diff options
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 2407 |
1 files changed, 1132 insertions, 1275 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 0503980c23d..9acc77eae48 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -1,6 +1,6 @@ /* * Digital Audio (PCM) abstract layer - * Copyright (c) by Jaroslav Kysela <perex@suse.cz> + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> * Abramo Bagnara <abramo@alsa-project.org> * * @@ -20,11 +20,13 @@ * */ -#include <sound/driver.h> #include <linux/slab.h> #include <linux/time.h> +#include <linux/math64.h> +#include <linux/export.h> #include <sound/core.h> #include <sound/control.h> +#include <sound/tlv.h> #include <sound/info.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -39,9 +41,9 @@ * * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately */ -void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr) +void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t frames, ofs, transfer; if (runtime->silence_size < runtime->boundary) { @@ -56,9 +58,8 @@ void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t runtime->silence_filled = 0; runtime->silence_start = runtime->control->appl_ptr; } - if (runtime->silence_filled == runtime->buffer_size) + if (runtime->silence_filled >= runtime->buffer_size) return; - snd_assert(runtime->silence_filled <= runtime->buffer_size, return); noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) return; @@ -68,6 +69,8 @@ void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t } else { if (new_hw_ptr == ULONG_MAX) { /* initialization */ snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); + if (avail > runtime->buffer_size) + avail = runtime->buffer_size; runtime->silence_filled = avail > 0 ? avail : 0; runtime->silence_start = (runtime->status->hw_ptr + runtime->silence_filled) % @@ -80,19 +83,18 @@ void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t runtime->silence_filled -= frames; if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { runtime->silence_filled = 0; - runtime->silence_start = (ofs + frames) - runtime->buffer_size; + runtime->silence_start = new_hw_ptr; } else { - runtime->silence_start = ofs - runtime->silence_filled; + runtime->silence_start = ofs; } - if ((snd_pcm_sframes_t)runtime->silence_start < 0) - runtime->silence_start += runtime->boundary; } frames = runtime->buffer_size - runtime->silence_filled; } - snd_assert(frames <= runtime->buffer_size, return); + if (snd_BUG_ON(frames > runtime->buffer_size)) + return; if (frames == 0) return; - ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size; + ofs = runtime->silence_start % runtime->buffer_size; while (frames > 0) { transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || @@ -100,7 +102,7 @@ void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t if (substream->ops->silence) { int err; err = substream->ops->silence(substream, -1, ofs, transfer); - snd_assert(err >= 0, ); + snd_BUG_ON(err < 0); } else { char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); @@ -112,7 +114,7 @@ void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t for (c = 0; c < channels; ++c) { int err; err = substream->ops->silence(substream, c, ofs, transfer); - snd_assert(err >= 0, ); + snd_BUG_ON(err < 0); } } else { size_t dma_csize = runtime->dma_bytes / channels; @@ -128,43 +130,152 @@ void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t } } -static void xrun(snd_pcm_substream_t *substream) +#ifdef CONFIG_SND_DEBUG +void snd_pcm_debug_name(struct snd_pcm_substream *substream, + char *name, size_t len) +{ + snprintf(name, len, "pcmC%dD%d%c:%d", + substream->pcm->card->number, + substream->pcm->device, + substream->stream ? 'c' : 'p', + substream->number); +} +EXPORT_SYMBOL(snd_pcm_debug_name); +#endif + +#define XRUN_DEBUG_BASIC (1<<0) +#define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ +#define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ +#define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ +#define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ +#define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ +#define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ + +#ifdef CONFIG_SND_PCM_XRUN_DEBUG + +#define xrun_debug(substream, mask) \ + ((substream)->pstr->xrun_debug & (mask)) +#else +#define xrun_debug(substream, mask) 0 +#endif + +#define dump_stack_on_xrun(substream) do { \ + if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ + dump_stack(); \ + } while (0) + +static void xrun(struct snd_pcm_substream *substream) { + struct snd_pcm_runtime *runtime = substream->runtime; + + if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) + snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); -#ifdef CONFIG_SND_DEBUG - if (substream->pstr->xrun_debug) { - snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n", - substream->pcm->card->number, - substream->pcm->device, - substream->stream ? 'c' : 'p'); - if (substream->pstr->xrun_debug > 1) - dump_stack(); + if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { + char name[16]; + snd_pcm_debug_name(substream, name, sizeof(name)); + pcm_warn(substream->pcm, "XRUN: %s\n", name); + dump_stack_on_xrun(substream); } -#endif } -static inline snd_pcm_uframes_t snd_pcm_update_hw_ptr_pos(snd_pcm_substream_t *substream, - snd_pcm_runtime_t *runtime) -{ +#ifdef CONFIG_SND_PCM_XRUN_DEBUG +#define hw_ptr_error(substream, fmt, args...) \ + do { \ + if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ + xrun_log_show(substream); \ + pr_err_ratelimited("ALSA: PCM: " fmt, ##args); \ + dump_stack_on_xrun(substream); \ + } \ + } while (0) + +#define XRUN_LOG_CNT 10 + +struct hwptr_log_entry { + unsigned int in_interrupt; + unsigned long jiffies; snd_pcm_uframes_t pos; + snd_pcm_uframes_t period_size; + snd_pcm_uframes_t buffer_size; + snd_pcm_uframes_t old_hw_ptr; + snd_pcm_uframes_t hw_ptr_base; +}; + +struct snd_pcm_hwptr_log { + unsigned int idx; + unsigned int hit: 1; + struct hwptr_log_entry entries[XRUN_LOG_CNT]; +}; + +static void xrun_log(struct snd_pcm_substream *substream, + snd_pcm_uframes_t pos, int in_interrupt) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_pcm_hwptr_log *log = runtime->hwptr_log; + struct hwptr_log_entry *entry; + + if (log == NULL) { + log = kzalloc(sizeof(*log), GFP_ATOMIC); + if (log == NULL) + return; + runtime->hwptr_log = log; + } else { + if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) + return; + } + entry = &log->entries[log->idx]; + entry->in_interrupt = in_interrupt; + entry->jiffies = jiffies; + entry->pos = pos; + entry->period_size = runtime->period_size; + entry->buffer_size = runtime->buffer_size; + entry->old_hw_ptr = runtime->status->hw_ptr; + entry->hw_ptr_base = runtime->hw_ptr_base; + log->idx = (log->idx + 1) % XRUN_LOG_CNT; +} - pos = substream->ops->pointer(substream); - if (pos == SNDRV_PCM_POS_XRUN) - return pos; /* XRUN */ - if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) - snd_timestamp_now((snd_timestamp_t*)&runtime->status->tstamp, runtime->tstamp_timespec); -#ifdef CONFIG_SND_DEBUG - if (pos >= runtime->buffer_size) { - snd_printk(KERN_ERR "BUG: stream = %i, pos = 0x%lx, buffer size = 0x%lx, period size = 0x%lx\n", substream->stream, pos, runtime->buffer_size, runtime->period_size); - } else -#endif - snd_runtime_check(pos < runtime->buffer_size, return 0); - pos -= pos % runtime->min_align; - return pos; +static void xrun_log_show(struct snd_pcm_substream *substream) +{ + struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; + struct hwptr_log_entry *entry; + char name[16]; + unsigned int idx; + int cnt; + + if (log == NULL) + return; + if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) + return; + snd_pcm_debug_name(substream, name, sizeof(name)); + for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { + entry = &log->entries[idx]; + if (entry->period_size == 0) + break; + pr_info("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " + "hwptr=%ld/%ld\n", + name, entry->in_interrupt ? "[Q] " : "", + entry->jiffies, + (unsigned long)entry->pos, + (unsigned long)entry->period_size, + (unsigned long)entry->buffer_size, + (unsigned long)entry->old_hw_ptr, + (unsigned long)entry->hw_ptr_base); + idx++; + idx %= XRUN_LOG_CNT; + } + log->hit = 1; } -static inline int snd_pcm_update_hw_ptr_post(snd_pcm_substream_t *substream, - snd_pcm_runtime_t *runtime) +#else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ + +#define hw_ptr_error(substream, fmt, args...) do { } while (0) +#define xrun_log(substream, pos, in_interrupt) do { } while (0) +#define xrun_log_show(substream) do { } while (0) + +#endif + +int snd_pcm_update_state(struct snd_pcm_substream *substream, + struct snd_pcm_runtime *runtime) { snd_pcm_uframes_t avail; @@ -174,104 +285,277 @@ static inline int snd_pcm_update_hw_ptr_post(snd_pcm_substream_t *substream, avail = snd_pcm_capture_avail(runtime); if (avail > runtime->avail_max) runtime->avail_max = avail; - if (avail >= runtime->stop_threshold) { - if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING) + if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { + if (avail >= runtime->buffer_size) { snd_pcm_drain_done(substream); - else + return -EPIPE; + } + } else { + if (avail >= runtime->stop_threshold) { xrun(substream); - return -EPIPE; + return -EPIPE; + } } - if (avail >= runtime->control->avail_min) + if (runtime->twake) { + if (avail >= runtime->twake) + wake_up(&runtime->tsleep); + } else if (avail >= runtime->control->avail_min) wake_up(&runtime->sleep); return 0; } -static inline int snd_pcm_update_hw_ptr_interrupt(snd_pcm_substream_t *substream) +static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, + unsigned int in_interrupt) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t pos; - snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt; - snd_pcm_sframes_t delta; + snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; + snd_pcm_sframes_t hdelta, delta; + unsigned long jdelta; + unsigned long curr_jiffies; + struct timespec curr_tstamp; + struct timespec audio_tstamp; + int crossed_boundary = 0; + + old_hw_ptr = runtime->status->hw_ptr; + + /* + * group pointer, time and jiffies reads to allow for more + * accurate correlations/corrections. + * The values are stored at the end of this routine after + * corrections for hw_ptr position + */ + pos = substream->ops->pointer(substream); + curr_jiffies = jiffies; + if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { + snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); + + if ((runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) && + (substream->ops->wall_clock)) + substream->ops->wall_clock(substream, &audio_tstamp); + } - pos = snd_pcm_update_hw_ptr_pos(substream, runtime); if (pos == SNDRV_PCM_POS_XRUN) { xrun(substream); return -EPIPE; } - if (runtime->period_size == runtime->buffer_size) - goto __next_buf; - new_hw_ptr = runtime->hw_ptr_base + pos; - hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size; - - delta = hw_ptr_interrupt - new_hw_ptr; - if (delta > 0) { - if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) { -#ifdef CONFIG_SND_DEBUG - if (runtime->periods > 1 && substream->pstr->xrun_debug) { - snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2); - if (substream->pstr->xrun_debug > 1) - dump_stack(); + if (pos >= runtime->buffer_size) { + if (printk_ratelimit()) { + char name[16]; + snd_pcm_debug_name(substream, name, sizeof(name)); + xrun_log_show(substream); + pcm_err(substream->pcm, + "XRUN: %s, pos = %ld, buffer size = %ld, period size = %ld\n", + name, pos, runtime->buffer_size, + runtime->period_size); + } + pos = 0; + } + pos -= pos % runtime->min_align; + if (xrun_debug(substream, XRUN_DEBUG_LOG)) + xrun_log(substream, pos, in_interrupt); + hw_base = runtime->hw_ptr_base; + new_hw_ptr = hw_base + pos; + if (in_interrupt) { + /* we know that one period was processed */ + /* delta = "expected next hw_ptr" for in_interrupt != 0 */ + delta = runtime->hw_ptr_interrupt + runtime->period_size; + if (delta > new_hw_ptr) { + /* check for double acknowledged interrupts */ + hdelta = curr_jiffies - runtime->hw_ptr_jiffies; + if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) { + hw_base = 0; + crossed_boundary++; + } + new_hw_ptr = hw_base + pos; + goto __delta; } -#endif - return 0; } - __next_buf: - runtime->hw_ptr_base += runtime->buffer_size; - if (runtime->hw_ptr_base == runtime->boundary) - runtime->hw_ptr_base = 0; - new_hw_ptr = runtime->hw_ptr_base + pos; } + /* new_hw_ptr might be lower than old_hw_ptr in case when */ + /* pointer crosses the end of the ring buffer */ + if (new_hw_ptr < old_hw_ptr) { + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) { + hw_base = 0; + crossed_boundary++; + } + new_hw_ptr = hw_base + pos; + } + __delta: + delta = new_hw_ptr - old_hw_ptr; + if (delta < 0) + delta += runtime->boundary; + if (xrun_debug(substream, in_interrupt ? + XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { + char name[16]; + snd_pcm_debug_name(substream, name, sizeof(name)); + pcm_dbg(substream->pcm, + "%s_update: %s: pos=%u/%u/%u, hwptr=%ld/%ld/%ld/%ld\n", + in_interrupt ? "period" : "hwptr", + name, + (unsigned int)pos, + (unsigned int)runtime->period_size, + (unsigned int)runtime->buffer_size, + (unsigned long)delta, + (unsigned long)old_hw_ptr, + (unsigned long)new_hw_ptr, + (unsigned long)runtime->hw_ptr_base); + } + + if (runtime->no_period_wakeup) { + snd_pcm_sframes_t xrun_threshold; + /* + * Without regular period interrupts, we have to check + * the elapsed time to detect xruns. + */ + jdelta = curr_jiffies - runtime->hw_ptr_jiffies; + if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) + goto no_delta_check; + hdelta = jdelta - delta * HZ / runtime->rate; + xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; + while (hdelta > xrun_threshold) { + delta += runtime->buffer_size; + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) { + hw_base = 0; + crossed_boundary++; + } + new_hw_ptr = hw_base + pos; + hdelta -= runtime->hw_ptr_buffer_jiffies; + } + goto no_delta_check; + } + + /* something must be really wrong */ + if (delta >= runtime->buffer_size + runtime->period_size) { + hw_ptr_error(substream, + "Unexpected hw_pointer value %s" + "(stream=%i, pos=%ld, new_hw_ptr=%ld, " + "old_hw_ptr=%ld)\n", + in_interrupt ? "[Q] " : "[P]", + substream->stream, (long)pos, + (long)new_hw_ptr, (long)old_hw_ptr); + return 0; + } + + /* Do jiffies check only in xrun_debug mode */ + if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) + goto no_jiffies_check; + + /* Skip the jiffies check for hardwares with BATCH flag. + * Such hardware usually just increases the position at each IRQ, + * thus it can't give any strange position. + */ + if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) + goto no_jiffies_check; + hdelta = delta; + if (hdelta < runtime->delay) + goto no_jiffies_check; + hdelta -= runtime->delay; + jdelta = curr_jiffies - runtime->hw_ptr_jiffies; + if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { + delta = jdelta / + (((runtime->period_size * HZ) / runtime->rate) + + HZ/100); + /* move new_hw_ptr according jiffies not pos variable */ + new_hw_ptr = old_hw_ptr; + hw_base = delta; + /* use loop to avoid checks for delta overflows */ + /* the delta value is small or zero in most cases */ + while (delta > 0) { + new_hw_ptr += runtime->period_size; + if (new_hw_ptr >= runtime->boundary) { + new_hw_ptr -= runtime->boundary; + crossed_boundary--; + } + delta--; + } + /* align hw_base to buffer_size */ + hw_ptr_error(substream, + "hw_ptr skipping! %s" + "(pos=%ld, delta=%ld, period=%ld, " + "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", + in_interrupt ? "[Q] " : "", + (long)pos, (long)hdelta, + (long)runtime->period_size, jdelta, + ((hdelta * HZ) / runtime->rate), hw_base, + (unsigned long)old_hw_ptr, + (unsigned long)new_hw_ptr); + /* reset values to proper state */ + delta = 0; + hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); + } + no_jiffies_check: + if (delta > runtime->period_size + runtime->period_size / 2) { + hw_ptr_error(substream, + "Lost interrupts? %s" + "(stream=%i, delta=%ld, new_hw_ptr=%ld, " + "old_hw_ptr=%ld)\n", + in_interrupt ? "[Q] " : "", + substream->stream, (long)delta, + (long)new_hw_ptr, + (long)old_hw_ptr); + } + + no_delta_check: + if (runtime->status->hw_ptr == new_hw_ptr) + return 0; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) snd_pcm_playback_silence(substream, new_hw_ptr); + if (in_interrupt) { + delta = new_hw_ptr - runtime->hw_ptr_interrupt; + if (delta < 0) + delta += runtime->boundary; + delta -= (snd_pcm_uframes_t)delta % runtime->period_size; + runtime->hw_ptr_interrupt += delta; + if (runtime->hw_ptr_interrupt >= runtime->boundary) + runtime->hw_ptr_interrupt -= runtime->boundary; + } + runtime->hw_ptr_base = hw_base; runtime->status->hw_ptr = new_hw_ptr; - runtime->hw_ptr_interrupt = new_hw_ptr - new_hw_ptr % runtime->period_size; + runtime->hw_ptr_jiffies = curr_jiffies; + if (crossed_boundary) { + snd_BUG_ON(crossed_boundary != 1); + runtime->hw_ptr_wrap += runtime->boundary; + } + if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { + runtime->status->tstamp = curr_tstamp; + + if (!(runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)) { + /* + * no wall clock available, provide audio timestamp + * derived from pointer position+delay + */ + u64 audio_frames, audio_nsecs; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + audio_frames = runtime->hw_ptr_wrap + + runtime->status->hw_ptr + - runtime->delay; + else + audio_frames = runtime->hw_ptr_wrap + + runtime->status->hw_ptr + + runtime->delay; + audio_nsecs = div_u64(audio_frames * 1000000000LL, + runtime->rate); + audio_tstamp = ns_to_timespec(audio_nsecs); + } + runtime->status->audio_tstamp = audio_tstamp; + } - return snd_pcm_update_hw_ptr_post(substream, runtime); + return snd_pcm_update_state(substream, runtime); } /* CAUTION: call it with irq disabled */ -int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream) +int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) { - snd_pcm_runtime_t *runtime = substream->runtime; - snd_pcm_uframes_t pos; - snd_pcm_uframes_t old_hw_ptr, new_hw_ptr; - snd_pcm_sframes_t delta; - - old_hw_ptr = runtime->status->hw_ptr; - pos = snd_pcm_update_hw_ptr_pos(substream, runtime); - if (pos == SNDRV_PCM_POS_XRUN) { - xrun(substream); - return -EPIPE; - } - new_hw_ptr = runtime->hw_ptr_base + pos; - - delta = old_hw_ptr - new_hw_ptr; - if (delta > 0) { - if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) { -#ifdef CONFIG_SND_DEBUG - if (runtime->periods > 2 && substream->pstr->xrun_debug) { - snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2); - if (substream->pstr->xrun_debug > 1) - dump_stack(); - } -#endif - return 0; - } - runtime->hw_ptr_base += runtime->buffer_size; - if (runtime->hw_ptr_base == runtime->boundary) - runtime->hw_ptr_base = 0; - new_hw_ptr = runtime->hw_ptr_base + pos; - } - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && - runtime->silence_size > 0) - snd_pcm_playback_silence(substream, new_hw_ptr); - - runtime->status->hw_ptr = new_hw_ptr; - - return snd_pcm_update_hw_ptr_post(substream, runtime); + return snd_pcm_update_hw_ptr0(substream, 0); } /** @@ -282,15 +566,17 @@ int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream) * * Sets the given PCM operators to the pcm instance. */ -void snd_pcm_set_ops(snd_pcm_t *pcm, int direction, snd_pcm_ops_t *ops) +void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, + const struct snd_pcm_ops *ops) { - snd_pcm_str_t *stream = &pcm->streams[direction]; - snd_pcm_substream_t *substream; + struct snd_pcm_str *stream = &pcm->streams[direction]; + struct snd_pcm_substream *substream; for (substream = stream->substream; substream != NULL; substream = substream->next) substream->ops = ops; } +EXPORT_SYMBOL(snd_pcm_set_ops); /** * snd_pcm_sync - set the PCM sync id @@ -298,9 +584,9 @@ void snd_pcm_set_ops(snd_pcm_t *pcm, int direction, snd_pcm_ops_t *ops) * * Sets the PCM sync identifier for the card. */ -void snd_pcm_set_sync(snd_pcm_substream_t * substream) +void snd_pcm_set_sync(struct snd_pcm_substream *substream) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; runtime->sync.id32[0] = substream->pcm->card->number; runtime->sync.id32[1] = -1; @@ -308,13 +594,12 @@ void snd_pcm_set_sync(snd_pcm_substream_t * substream) runtime->sync.id32[3] = -1; } +EXPORT_SYMBOL(snd_pcm_set_sync); + /* * Standard ioctl routine */ -/* Code taken from alsa-lib */ -#define assert(a) snd_assert((a), return -EINVAL) - static inline unsigned int div32(unsigned int a, unsigned int b, unsigned int *r) { @@ -359,11 +644,11 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b, { u_int64_t n = (u_int64_t) a * b; if (c == 0) { - snd_assert(n > 0, ); + snd_BUG_ON(!n); *r = 0; return UINT_MAX; } - div64_32(&n, c, r); + n = div_u64_rem(n, c, r); if (n >= UINT_MAX) { *r = 0; return UINT_MAX; @@ -371,56 +656,6 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b, return n; } -static int snd_interval_refine_min(snd_interval_t *i, unsigned int min, int openmin) -{ - int changed = 0; - assert(!snd_interval_empty(i)); - if (i->min < min) { - i->min = min; - i->openmin = openmin; - changed = 1; - } else if (i->min == min && !i->openmin && openmin) { - i->openmin = 1; - changed = 1; - } - if (i->integer) { - if (i->openmin) { - i->min++; - i->openmin = 0; - } - } - if (snd_interval_checkempty(i)) { - snd_interval_none(i); - return -EINVAL; - } - return changed; -} - -static int snd_interval_refine_max(snd_interval_t *i, unsigned int max, int openmax) -{ - int changed = 0; - assert(!snd_interval_empty(i)); - if (i->max > max) { - i->max = max; - i->openmax = openmax; - changed = 1; - } else if (i->max == max && !i->openmax && openmax) { - i->openmax = 1; - changed = 1; - } - if (i->integer) { - if (i->openmax) { - i->max--; - i->openmax = 0; - } - } - if (snd_interval_checkempty(i)) { - snd_interval_none(i); - return -EINVAL; - } - return changed; -} - /** * snd_interval_refine - refine the interval value of configurator * @i: the interval value to refine @@ -430,12 +665,14 @@ static int snd_interval_refine_max(snd_interval_t *i, unsigned int max, int open * The interval is changed to the range satisfying both intervals. * The interval status (min, max, integer, etc.) are evaluated. * - * Returns non-zero if the value is changed, zero if not changed. + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. */ -int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v) +int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) { int changed = 0; - assert(!snd_interval_empty(i)); + if (snd_BUG_ON(snd_interval_empty(i))) + return -EINVAL; if (i->min < v->min) { i->min = v->min; i->openmin = v->openmin; @@ -474,9 +711,12 @@ int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v) return changed; } -static int snd_interval_refine_first(snd_interval_t *i) +EXPORT_SYMBOL(snd_interval_refine); + +static int snd_interval_refine_first(struct snd_interval *i) { - assert(!snd_interval_empty(i)); + if (snd_BUG_ON(snd_interval_empty(i))) + return -EINVAL; if (snd_interval_single(i)) return 0; i->max = i->min; @@ -486,9 +726,10 @@ static int snd_interval_refine_first(snd_interval_t *i) return 1; } -static int snd_interval_refine_last(snd_interval_t *i) +static int snd_interval_refine_last(struct snd_interval *i) { - assert(!snd_interval_empty(i)); + if (snd_BUG_ON(snd_interval_empty(i))) + return -EINVAL; if (snd_interval_single(i)) return 0; i->min = i->max; @@ -498,17 +739,7 @@ static int snd_interval_refine_last(snd_interval_t *i) return 1; } -static int snd_interval_refine_set(snd_interval_t *i, unsigned int val) -{ - snd_interval_t t; - t.empty = 0; - t.min = t.max = val; - t.openmin = t.openmax = 0; - t.integer = 1; - return snd_interval_refine(i, &t); -} - -void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c) +void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) { if (a->empty || b->empty) { snd_interval_none(c); @@ -532,7 +763,7 @@ void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_inte * * Returns non-zero if the value is changed, zero if not changed. */ -void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c) +void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) { unsigned int r; if (a->empty || b->empty) { @@ -567,8 +798,8 @@ void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_inte * * Returns non-zero if the value is changed, zero if not changed. */ -void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, - unsigned int k, snd_interval_t *c) +void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, + unsigned int k, struct snd_interval *c) { unsigned int r; if (a->empty || b->empty) { @@ -598,8 +829,8 @@ void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, * * Returns non-zero if the value is changed, zero if not changed. */ -void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k, - const snd_interval_t *b, snd_interval_t *c) +void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, + const struct snd_interval *b, struct snd_interval *c) { unsigned int r; if (a->empty || b->empty) { @@ -623,7 +854,6 @@ void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k, c->integer = 0; } -#undef assert /* ---- */ @@ -635,16 +865,20 @@ void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k, * @nump: pointer to store the resultant numerator * @denp: pointer to store the resultant denominator * - * Returns non-zero if the value is changed, zero if not changed. + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. */ -int snd_interval_ratnum(snd_interval_t *i, - unsigned int rats_count, ratnum_t *rats, - unsigned int *nump, unsigned int *denp) +int snd_interval_ratnum(struct snd_interval *i, + unsigned int rats_count, struct snd_ratnum *rats, + unsigned int *nump, unsigned int *denp) { - unsigned int best_num, best_diff, best_den; + unsigned int best_num, best_den; + int best_diff; unsigned int k; - snd_interval_t t; + struct snd_interval t; int err; + unsigned int result_num, result_den; + int result_diff; best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { @@ -654,7 +888,7 @@ int snd_interval_ratnum(snd_interval_t *i, int diff; if (q == 0) q = 1; - den = div_down(num, q); + den = div_up(num, q); if (den < rats[k].den_min) continue; if (den > rats[k].den_max) @@ -666,6 +900,8 @@ int snd_interval_ratnum(snd_interval_t *i, den -= r; } diff = num - q * den; + if (diff < 0) + diff = -diff; if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; @@ -680,6 +916,9 @@ int snd_interval_ratnum(snd_interval_t *i, t.min = div_down(best_num, best_den); t.openmin = !!(best_num % best_den); + result_num = best_num; + result_diff = best_diff; + result_den = best_den; best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num = rats[k].num; @@ -690,7 +929,7 @@ int snd_interval_ratnum(snd_interval_t *i, i->empty = 1; return -EINVAL; } - den = div_up(num, q); + den = div_down(num, q); if (den > rats[k].den_max) continue; if (den < rats[k].den_min) @@ -702,6 +941,8 @@ int snd_interval_ratnum(snd_interval_t *i, den += rats[k].den_step - r; } diff = q * den - num; + if (diff < 0) + diff = -diff; if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; @@ -721,31 +962,38 @@ int snd_interval_ratnum(snd_interval_t *i, return err; if (snd_interval_single(i)) { + if (best_diff * result_den < result_diff * best_den) { + result_num = best_num; + result_den = best_den; + } if (nump) - *nump = best_num; + *nump = result_num; if (denp) - *denp = best_den; + *denp = result_den; } return err; } +EXPORT_SYMBOL(snd_interval_ratnum); + /** * snd_interval_ratden - refine the interval value * @i: interval to refine - * @rats_count: number of ratden_t - * @rats: ratden_t array + * @rats_count: number of struct ratden + * @rats: struct ratden array * @nump: pointer to store the resultant numerator * @denp: pointer to store the resultant denominator * - * Returns non-zero if the value is changed, zero if not changed. + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. */ -static int snd_interval_ratden(snd_interval_t *i, - unsigned int rats_count, ratden_t *rats, +static int snd_interval_ratden(struct snd_interval *i, + unsigned int rats_count, struct snd_ratden *rats, unsigned int *nump, unsigned int *denp) { unsigned int best_num, best_diff, best_den; unsigned int k; - snd_interval_t t; + struct snd_interval t; int err; best_num = best_den = best_diff = 0; @@ -836,50 +1084,36 @@ static int snd_interval_ratden(snd_interval_t *i, * When mask is non-zero, only the elements corresponding to bit 1 are * evaluated. * - * Returns non-zero if the value is changed, zero if not changed. + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. */ -int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask) +int snd_interval_list(struct snd_interval *i, unsigned int count, + const unsigned int *list, unsigned int mask) { unsigned int k; - int changed = 0; + struct snd_interval list_range; + + if (!count) { + i->empty = 1; + return -EINVAL; + } + snd_interval_any(&list_range); + list_range.min = UINT_MAX; + list_range.max = 0; for (k = 0; k < count; k++) { if (mask && !(mask & (1 << k))) continue; - if (i->min == list[k] && !i->openmin) - goto _l1; - if (i->min < list[k]) { - i->min = list[k]; - i->openmin = 0; - changed = 1; - goto _l1; - } - } - i->empty = 1; - return -EINVAL; - _l1: - for (k = count; k-- > 0;) { - if (mask && !(mask & (1 << k))) + if (!snd_interval_test(i, list[k])) continue; - if (i->max == list[k] && !i->openmax) - goto _l2; - if (i->max > list[k]) { - i->max = list[k]; - i->openmax = 0; - changed = 1; - goto _l2; - } + list_range.min = min(list_range.min, list[k]); + list_range.max = max(list_range.max, list[k]); } - i->empty = 1; - return -EINVAL; - _l2: - if (snd_interval_checkempty(i)) { - i->empty = 1; - return -EINVAL; - } - return changed; + return snd_interval_refine(i, &list_range); } -static int snd_interval_step(snd_interval_t *i, unsigned int min, unsigned int step) +EXPORT_SYMBOL(snd_interval_list); + +static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) { unsigned int n; int changed = 0; @@ -911,24 +1145,26 @@ static int snd_interval_step(snd_interval_t *i, unsigned int min, unsigned int s * @private: the private data pointer passed to function * @dep: the dependent variables * - * Returns zero if successful, or a negative error code on failure. + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, unsigned int cond, +int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, int var, snd_pcm_hw_rule_func_t func, void *private, int dep, ...) { - snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; - snd_pcm_hw_rule_t *c; + struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; + struct snd_pcm_hw_rule *c; unsigned int k; va_list args; va_start(args, dep); if (constrs->rules_num >= constrs->rules_all) { - snd_pcm_hw_rule_t *new; + struct snd_pcm_hw_rule *new; unsigned int new_rules = constrs->rules_all + 16; new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); - if (!new) + if (!new) { + va_end(args); return -ENOMEM; + } if (constrs->rules) { memcpy(new, constrs->rules, constrs->rules_num * sizeof(*c)); @@ -944,7 +1180,10 @@ int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, unsigned int cond, c->private = private; k = 0; while (1) { - snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL); + if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { + va_end(args); + return -EINVAL; + } c->deps[k++] = dep; if (dep < 0) break; @@ -953,21 +1192,25 @@ int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, unsigned int cond, constrs->rules_num++; va_end(args); return 0; -} +} + +EXPORT_SYMBOL(snd_pcm_hw_rule_add); /** - * snd_pcm_hw_constraint_mask + * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint * @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the bitmap mask * - * Apply the constraint of the given bitmap mask to a mask parameter. + * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, +int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, u_int32_t mask) { - snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; - snd_mask_t *maskp = constrs_mask(constrs, var); + struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; + struct snd_mask *maskp = constrs_mask(constrs, var); *maskp->bits &= mask; memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ if (*maskp->bits == 0) @@ -976,18 +1219,20 @@ int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t va } /** - * snd_pcm_hw_constraint_mask64 + * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint * @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the 64bit bitmap mask * - * Apply the constraint of the given bitmap mask to a mask parameter. + * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, +int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, u_int64_t mask) { - snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; - snd_mask_t *maskp = constrs_mask(constrs, var); + struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; + struct snd_mask *maskp = constrs_mask(constrs, var); maskp->bits[0] &= (u_int32_t)mask; maskp->bits[1] &= (u_int32_t)(mask >> 32); memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ @@ -995,34 +1240,43 @@ int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t return -EINVAL; return 0; } +EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); /** - * snd_pcm_hw_constraint_integer + * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval * @runtime: PCM runtime instance * @var: hw_params variable to apply the integer constraint * * Apply the constraint of integer to an interval parameter. + * + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. */ -int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var) +int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) { - snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; + struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; return snd_interval_setinteger(constrs_interval(constrs, var)); } +EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); + /** - * snd_pcm_hw_constraint_minmax + * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval * @runtime: PCM runtime instance * @var: hw_params variable to apply the range * @min: the minimal value * @max: the maximal value * * Apply the min/max range constraint to an interval parameter. + * + * Return: Positive if the value is changed, zero if it's not changed, or a + * negative error code. */ -int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, +int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, unsigned int min, unsigned int max) { - snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; - snd_interval_t t; + struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; + struct snd_interval t; t.min = min; t.max = max; t.openmin = t.openmax = 0; @@ -1030,37 +1284,43 @@ int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t return snd_interval_refine(constrs_interval(constrs, var), &t); } -static int snd_pcm_hw_rule_list(snd_pcm_hw_params_t *params, - snd_pcm_hw_rule_t *rule) +EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); + +static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) { - snd_pcm_hw_constraint_list_t *list = rule->private; + struct snd_pcm_hw_constraint_list *list = rule->private; return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); } /** - * snd_pcm_hw_constraint_list + * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter * @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the list constraint * @l: list * * Apply the list of constraints to an interval parameter. + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, +int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, - snd_pcm_hw_constraint_list_t *l) + const struct snd_pcm_hw_constraint_list *l) { return snd_pcm_hw_rule_add(runtime, cond, var, - snd_pcm_hw_rule_list, l, + snd_pcm_hw_rule_list, (void *)l, var, -1); } -static int snd_pcm_hw_rule_ratnums(snd_pcm_hw_params_t *params, - snd_pcm_hw_rule_t *rule) +EXPORT_SYMBOL(snd_pcm_hw_constraint_list); + +static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) { - snd_pcm_hw_constraint_ratnums_t *r = rule->private; + struct snd_pcm_hw_constraint_ratnums *r = rule->private; unsigned int num = 0, den = 0; int err; err = snd_interval_ratnum(hw_param_interval(params, rule->var), @@ -1073,26 +1333,30 @@ static int snd_pcm_hw_rule_ratnums(snd_pcm_hw_params_t *params, } /** - * snd_pcm_hw_constraint_ratnums + * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter * @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratnums constraint - * @r: ratnums_t constriants + * @r: struct snd_ratnums constriants + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, +int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, - snd_pcm_hw_constraint_ratnums_t *r) + struct snd_pcm_hw_constraint_ratnums *r) { return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratnums, r, var, -1); } -static int snd_pcm_hw_rule_ratdens(snd_pcm_hw_params_t *params, - snd_pcm_hw_rule_t *rule) +EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); + +static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) { - snd_pcm_hw_constraint_ratdens_t *r = rule->private; + struct snd_pcm_hw_constraint_ratdens *r = rule->private; unsigned int num = 0, den = 0; int err = snd_interval_ratden(hw_param_interval(params, rule->var), r->nrats, r->rats, &num, &den); @@ -1104,42 +1368,48 @@ static int snd_pcm_hw_rule_ratdens(snd_pcm_hw_params_t *params, } /** - * snd_pcm_hw_constraint_ratdens + * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter * @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratdens constraint - * @r: ratdens_t constriants + * @r: struct snd_ratdens constriants + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, +int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, - snd_pcm_hw_constraint_ratdens_t *r) + struct snd_pcm_hw_constraint_ratdens *r) { return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratdens, r, var, -1); } -static int snd_pcm_hw_rule_msbits(snd_pcm_hw_params_t *params, - snd_pcm_hw_rule_t *rule) +EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); + +static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) { unsigned int l = (unsigned long) rule->private; int width = l & 0xffff; unsigned int msbits = l >> 16; - snd_interval_t *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); + struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); if (snd_interval_single(i) && snd_interval_value(i) == width) params->msbits = msbits; return 0; } /** - * snd_pcm_hw_constraint_msbits + * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule * @runtime: PCM runtime instance * @cond: condition bits * @width: sample bits width * @msbits: msbits width + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, +int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, unsigned int cond, unsigned int width, unsigned int msbits) @@ -1151,21 +1421,25 @@ int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); } -static int snd_pcm_hw_rule_step(snd_pcm_hw_params_t *params, - snd_pcm_hw_rule_t *rule) +EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); + +static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) { unsigned long step = (unsigned long) rule->private; return snd_interval_step(hw_param_interval(params, rule->var), 0, step); } /** - * snd_pcm_hw_constraint_step + * snd_pcm_hw_constraint_step - add a hw constraint step rule * @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the step constraint * @step: step size + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime, +int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, unsigned long step) @@ -1175,9 +1449,11 @@ int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime, var, -1); } -static int snd_pcm_hw_rule_pow2(snd_pcm_hw_params_t *params, snd_pcm_hw_rule_t *rule) +EXPORT_SYMBOL(snd_pcm_hw_constraint_step); + +static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { - static int pow2_sizes[] = { + static unsigned int pow2_sizes[] = { 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, @@ -1188,12 +1464,14 @@ static int snd_pcm_hw_rule_pow2(snd_pcm_hw_params_t *params, snd_pcm_hw_rule_t * } /** - * snd_pcm_hw_constraint_pow2 + * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule * @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the power-of-2 constraint + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime, +int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var) { @@ -1202,14 +1480,37 @@ int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime, var, -1); } -/* To use the same code we have in alsa-lib */ -#define snd_pcm_t snd_pcm_substream_t -#define assert(i) snd_assert((i), return -EINVAL) -#ifndef INT_MIN -#define INT_MIN ((int)((unsigned int)INT_MAX+1)) -#endif +EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); + +static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; + struct snd_interval *rate; + + rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + return snd_interval_list(rate, 1, &base_rate, 0); +} + +/** + * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling + * @runtime: PCM runtime instance + * @base_rate: the rate at which the hardware does not resample + * + * Return: Zero if successful, or a negative error code on failure. + */ +int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, + unsigned int base_rate) +{ + return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, + SNDRV_PCM_HW_PARAM_RATE, + snd_pcm_hw_rule_noresample_func, + (void *)(uintptr_t)base_rate, + SNDRV_PCM_HW_PARAM_RATE, -1); +} +EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); -static void _snd_pcm_hw_param_any(snd_pcm_hw_params_t *params, +static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { if (hw_is_mask(var)) { @@ -1227,19 +1528,7 @@ static void _snd_pcm_hw_param_any(snd_pcm_hw_params_t *params, snd_BUG(); } -#if 0 -/* - * snd_pcm_hw_param_any - */ -int snd_pcm_hw_param_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var) -{ - _snd_pcm_hw_param_any(params, var); - return snd_pcm_hw_refine(pcm, params); -} -#endif /* 0 */ - -void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params) +void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) { unsigned int k; memset(params, 0, sizeof(*params)); @@ -1250,33 +1539,22 @@ void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params) params->info = ~0U; } -#if 0 -/* - * snd_pcm_hw_params_any - * - * Fill PARAMS with full configuration space boundaries - */ -int snd_pcm_hw_params_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params) -{ - _snd_pcm_hw_params_any(params); - return snd_pcm_hw_refine(pcm, params); -} -#endif /* 0 */ +EXPORT_SYMBOL(_snd_pcm_hw_params_any); /** - * snd_pcm_hw_param_value + * snd_pcm_hw_param_value - return @params field @var value * @params: the hw_params instance * @var: parameter to retrieve - * @dir: pointer to the direction (-1,0,1) or NULL + * @dir: pointer to the direction (-1,0,1) or %NULL * - * Return the value for field PAR if it's fixed in configuration space - * defined by PARAMS. Return -EINVAL otherwise + * Return: The value for field @var if it's fixed in configuration space + * defined by @params. -%EINVAL otherwise. */ -static int snd_pcm_hw_param_value(const snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, int *dir) +int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var, int *dir) { if (hw_is_mask(var)) { - const snd_mask_t *mask = hw_param_mask_c(params, var); + const struct snd_mask *mask = hw_param_mask_c(params, var); if (!snd_mask_single(mask)) return -EINVAL; if (dir) @@ -1284,70 +1562,19 @@ static int snd_pcm_hw_param_value(const snd_pcm_hw_params_t *params, return snd_mask_value(mask); } if (hw_is_interval(var)) { - const snd_interval_t *i = hw_param_interval_c(params, var); + const struct snd_interval *i = hw_param_interval_c(params, var); if (!snd_interval_single(i)) return -EINVAL; if (dir) *dir = i->openmin; return snd_interval_value(i); } - assert(0); - return -EINVAL; -} - -/** - * snd_pcm_hw_param_value_min - * @params: the hw_params instance - * @var: parameter to retrieve - * @dir: pointer to the direction (-1,0,1) or NULL - * - * Return the minimum value for field PAR. - */ -unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, int *dir) -{ - if (hw_is_mask(var)) { - if (dir) - *dir = 0; - return snd_mask_min(hw_param_mask_c(params, var)); - } - if (hw_is_interval(var)) { - const snd_interval_t *i = hw_param_interval_c(params, var); - if (dir) - *dir = i->openmin; - return snd_interval_min(i); - } - assert(0); return -EINVAL; } -/** - * snd_pcm_hw_param_value_max - * @params: the hw_params instance - * @var: parameter to retrieve - * @dir: pointer to the direction (-1,0,1) or NULL - * - * Return the maximum value for field PAR. - */ -unsigned int snd_pcm_hw_param_value_max(const snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, int *dir) -{ - if (hw_is_mask(var)) { - if (dir) - *dir = 0; - return snd_mask_max(hw_param_mask_c(params, var)); - } - if (hw_is_interval(var)) { - const snd_interval_t *i = hw_param_interval_c(params, var); - if (dir) - *dir = - (int) i->openmax; - return snd_interval_max(i); - } - assert(0); - return -EINVAL; -} +EXPORT_SYMBOL(snd_pcm_hw_param_value); -void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, +void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { if (hw_is_mask(var)) { @@ -1363,44 +1590,9 @@ void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, } } -int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var) -{ - int changed; - assert(hw_is_interval(var)); - changed = snd_interval_setinteger(hw_param_interval(params, var)); - if (changed) { - params->cmask |= 1 << var; - params->rmask |= 1 << var; - } - return changed; -} - -#if 0 -/* - * snd_pcm_hw_param_setinteger - * - * Inside configuration space defined by PARAMS remove from PAR all - * non integer values. Reduce configuration space accordingly. - * Return -EINVAL if the configuration space is empty - */ -int snd_pcm_hw_param_setinteger(snd_pcm_t *pcm, - snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var) -{ - int changed = _snd_pcm_hw_param_setinteger(params, var); - if (changed < 0) - return changed; - if (params->rmask) { - int err = snd_pcm_hw_refine(pcm, params); - if (err < 0) - return err; - } - return 0; -} -#endif /* 0 */ +EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); -static int _snd_pcm_hw_param_first(snd_pcm_hw_params_t *params, +static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { int changed; @@ -1408,10 +1600,8 @@ static int _snd_pcm_hw_param_first(snd_pcm_hw_params_t *params, changed = snd_mask_refine_first(hw_param_mask(params, var)); else if (hw_is_interval(var)) changed = snd_interval_refine_first(hw_param_interval(params, var)); - else { - assert(0); + else return -EINVAL; - } if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; @@ -1421,31 +1611,35 @@ static int _snd_pcm_hw_param_first(snd_pcm_hw_params_t *params, /** - * snd_pcm_hw_param_first + * snd_pcm_hw_param_first - refine config space and return minimum value * @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve - * @dir: pointer to the direction (-1,0,1) or NULL + * @dir: pointer to the direction (-1,0,1) or %NULL * - * Inside configuration space defined by PARAMS remove from PAR all + * Inside configuration space defined by @params remove from @var all * values > minimum. Reduce configuration space accordingly. - * Return the minimum. + * + * Return: The minimum, or a negative error code on failure. */ -static int snd_pcm_hw_param_first(snd_pcm_t *pcm, - snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, int *dir) +int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, + struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var, int *dir) { int changed = _snd_pcm_hw_param_first(params, var); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); - assert(err >= 0); + if (snd_BUG_ON(err < 0)) + return err; } return snd_pcm_hw_param_value(params, var, dir); } -static int _snd_pcm_hw_param_last(snd_pcm_hw_params_t *params, +EXPORT_SYMBOL(snd_pcm_hw_param_first); + +static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { int changed; @@ -1453,10 +1647,8 @@ static int _snd_pcm_hw_param_last(snd_pcm_hw_params_t *params, changed = snd_mask_refine_last(hw_param_mask(params, var)); else if (hw_is_interval(var)) changed = snd_interval_refine_last(hw_param_interval(params, var)); - else { - assert(0); + else return -EINVAL; - } if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; @@ -1466,456 +1658,95 @@ static int _snd_pcm_hw_param_last(snd_pcm_hw_params_t *params, /** - * snd_pcm_hw_param_last + * snd_pcm_hw_param_last - refine config space and return maximum value * @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve - * @dir: pointer to the direction (-1,0,1) or NULL + * @dir: pointer to the direction (-1,0,1) or %NULL * - * Inside configuration space defined by PARAMS remove from PAR all + * Inside configuration space defined by @params remove from @var all * values < maximum. Reduce configuration space accordingly. - * Return the maximum. - */ -static int snd_pcm_hw_param_last(snd_pcm_t *pcm, - snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, int *dir) -{ - int changed = _snd_pcm_hw_param_last(params, var); - if (changed < 0) - return changed; - if (params->rmask) { - int err = snd_pcm_hw_refine(pcm, params); - assert(err >= 0); - } - return snd_pcm_hw_param_value(params, var, dir); -} - -int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int val, int dir) -{ - int changed; - int open = 0; - if (dir) { - if (dir > 0) { - open = 1; - } else if (dir < 0) { - if (val > 0) { - open = 1; - val--; - } - } - } - if (hw_is_mask(var)) - changed = snd_mask_refine_min(hw_param_mask(params, var), val + !!open); - else if (hw_is_interval(var)) - changed = snd_interval_refine_min(hw_param_interval(params, var), val, open); - else { - assert(0); - return -EINVAL; - } - if (changed) { - params->cmask |= 1 << var; - params->rmask |= 1 << var; - } - return changed; -} - -/** - * snd_pcm_hw_param_min - * @pcm: PCM instance - * @params: the hw_params instance - * @var: parameter to retrieve - * @val: minimal value - * @dir: pointer to the direction (-1,0,1) or NULL - * - * Inside configuration space defined by PARAMS remove from PAR all - * values < VAL. Reduce configuration space accordingly. - * Return new minimum or -EINVAL if the configuration space is empty - */ -static int snd_pcm_hw_param_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int val, - int *dir) -{ - int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); - if (changed < 0) - return changed; - if (params->rmask) { - int err = snd_pcm_hw_refine(pcm, params); - if (err < 0) - return err; - } - return snd_pcm_hw_param_value_min(params, var, dir); -} - -static int _snd_pcm_hw_param_max(snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int val, - int dir) -{ - int changed; - int open = 0; - if (dir) { - if (dir < 0) { - open = 1; - } else if (dir > 0) { - open = 1; - val++; - } - } - if (hw_is_mask(var)) { - if (val == 0 && open) { - snd_mask_none(hw_param_mask(params, var)); - changed = -EINVAL; - } else - changed = snd_mask_refine_max(hw_param_mask(params, var), val - !!open); - } else if (hw_is_interval(var)) - changed = snd_interval_refine_max(hw_param_interval(params, var), val, open); - else { - assert(0); - return -EINVAL; - } - if (changed) { - params->cmask |= 1 << var; - params->rmask |= 1 << var; - } - return changed; -} - -/** - * snd_pcm_hw_param_max - * @pcm: PCM instance - * @params: the hw_params instance - * @var: parameter to retrieve - * @val: maximal value - * @dir: pointer to the direction (-1,0,1) or NULL * - * Inside configuration space defined by PARAMS remove from PAR all - * values >= VAL + 1. Reduce configuration space accordingly. - * Return new maximum or -EINVAL if the configuration space is empty + * Return: The maximum, or a negative error code on failure. */ -static int snd_pcm_hw_param_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int val, - int *dir) +int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, + struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var, int *dir) { - int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); - if (changed < 0) - return changed; - if (params->rmask) { - int err = snd_pcm_hw_refine(pcm, params); - if (err < 0) - return err; - } - return snd_pcm_hw_param_value_max(params, var, dir); -} - -int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int val, int dir) -{ - int changed; - if (hw_is_mask(var)) { - snd_mask_t *m = hw_param_mask(params, var); - if (val == 0 && dir < 0) { - changed = -EINVAL; - snd_mask_none(m); - } else { - if (dir > 0) - val++; - else if (dir < 0) - val--; - changed = snd_mask_refine_set(hw_param_mask(params, var), val); - } - } else if (hw_is_interval(var)) { - snd_interval_t *i = hw_param_interval(params, var); - if (val == 0 && dir < 0) { - changed = -EINVAL; - snd_interval_none(i); - } else if (dir == 0) - changed = snd_interval_refine_set(i, val); - else { - snd_interval_t t; - t.openmin = 1; - t.openmax = 1; - t.empty = 0; - t.integer = 0; - if (dir < 0) { - t.min = val - 1; - t.max = val; - } else { - t.min = val; - t.max = val+1; - } - changed = snd_interval_refine(i, &t); - } - } else { - assert(0); - return -EINVAL; - } - if (changed) { - params->cmask |= 1 << var; - params->rmask |= 1 << var; - } - return changed; -} - -/** - * snd_pcm_hw_param_set - * @pcm: PCM instance - * @params: the hw_params instance - * @var: parameter to retrieve - * @val: value to set - * @dir: pointer to the direction (-1,0,1) or NULL - * - * Inside configuration space defined by PARAMS remove from PAR all - * values != VAL. Reduce configuration space accordingly. - * Return VAL or -EINVAL if the configuration space is empty - */ -int snd_pcm_hw_param_set(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int val, int dir) -{ - int changed = _snd_pcm_hw_param_set(params, var, val, dir); - if (changed < 0) - return changed; - if (params->rmask) { - int err = snd_pcm_hw_refine(pcm, params); - if (err < 0) - return err; - } - return snd_pcm_hw_param_value(params, var, NULL); -} - -static int _snd_pcm_hw_param_mask(snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, const snd_mask_t *val) -{ - int changed; - assert(hw_is_mask(var)); - changed = snd_mask_refine(hw_param_mask(params, var), val); - if (changed) { - params->cmask |= 1 << var; - params->rmask |= 1 << var; - } - return changed; -} - -/** - * snd_pcm_hw_param_mask - * @pcm: PCM instance - * @params: the hw_params instance - * @var: parameter to retrieve - * @val: mask to apply - * - * Inside configuration space defined by PARAMS remove from PAR all values - * not contained in MASK. Reduce configuration space accordingly. - * This function can be called only for SNDRV_PCM_HW_PARAM_ACCESS, - * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. - * Return 0 on success or -EINVAL - * if the configuration space is empty - */ -int snd_pcm_hw_param_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, const snd_mask_t *val) -{ - int changed = _snd_pcm_hw_param_mask(params, var, val); + int changed = _snd_pcm_hw_param_last(params, var); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); - if (err < 0) + if (snd_BUG_ON(err < 0)) return err; } - return 0; -} - -static int boundary_sub(int a, int adir, - int b, int bdir, - int *c, int *cdir) -{ - adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); - bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); - *c = a - b; - *cdir = adir - bdir; - if (*cdir == -2) { - assert(*c > INT_MIN); - (*c)--; - } else if (*cdir == 2) { - assert(*c < INT_MAX); - (*c)++; - } - return 0; -} - -static int boundary_lt(unsigned int a, int adir, - unsigned int b, int bdir) -{ - assert(a > 0 || adir >= 0); - assert(b > 0 || bdir >= 0); - if (adir < 0) { - a--; - adir = 1; - } else if (adir > 0) - adir = 1; - if (bdir < 0) { - b--; - bdir = 1; - } else if (bdir > 0) - bdir = 1; - return a < b || (a == b && adir < bdir); -} - -/* Return 1 if min is nearer to best than max */ -static int boundary_nearer(int min, int mindir, - int best, int bestdir, - int max, int maxdir) -{ - int dmin, dmindir; - int dmax, dmaxdir; - boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); - boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); - return boundary_lt(dmin, dmindir, dmax, dmaxdir); + return snd_pcm_hw_param_value(params, var, dir); } -/** - * snd_pcm_hw_param_near - * @pcm: PCM instance - * @params: the hw_params instance - * @var: parameter to retrieve - * @best: value to set - * @dir: pointer to the direction (-1,0,1) or NULL - * - * Inside configuration space defined by PARAMS set PAR to the available value - * nearest to VAL. Reduce configuration space accordingly. - * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, - * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. - * Return the value found. - */ -int snd_pcm_hw_param_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, unsigned int best, int *dir) -{ - snd_pcm_hw_params_t *save = NULL; - int v; - unsigned int saved_min; - int last = 0; - int min, max; - int mindir, maxdir; - int valdir = dir ? *dir : 0; - /* FIXME */ - if (best > INT_MAX) - best = INT_MAX; - min = max = best; - mindir = maxdir = valdir; - if (maxdir > 0) - maxdir = 0; - else if (maxdir == 0) - maxdir = -1; - else { - maxdir = 1; - max--; - } - save = kmalloc(sizeof(*save), GFP_KERNEL); - if (save == NULL) - return -ENOMEM; - *save = *params; - saved_min = min; - min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); - if (min >= 0) { - snd_pcm_hw_params_t *params1; - if (max < 0) - goto _end; - if ((unsigned int)min == saved_min && mindir == valdir) - goto _end; - params1 = kmalloc(sizeof(*params1), GFP_KERNEL); - if (params1 == NULL) { - kfree(save); - return -ENOMEM; - } - *params1 = *save; - max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); - if (max < 0) { - kfree(params1); - goto _end; - } - if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { - *params = *params1; - last = 1; - } - kfree(params1); - } else { - *params = *save; - max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); - assert(max >= 0); - last = 1; - } - _end: - kfree(save); - if (last) - v = snd_pcm_hw_param_last(pcm, params, var, dir); - else - v = snd_pcm_hw_param_first(pcm, params, var, dir); - assert(v >= 0); - return v; -} +EXPORT_SYMBOL(snd_pcm_hw_param_last); /** - * snd_pcm_hw_param_choose + * snd_pcm_hw_param_choose - choose a configuration defined by @params * @pcm: PCM instance * @params: the hw_params instance * - * Choose one configuration from configuration space defined by PARAMS + * Choose one configuration from configuration space defined by @params. * The configuration chosen is that obtained fixing in this order: * first access, first format, first subformat, min channels, * min rate, min period time, max buffer size, min tick time + * + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_hw_params_choose(snd_pcm_t *pcm, snd_pcm_hw_params_t *params) -{ - int err; - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_ACCESS, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_FORMAT, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_SUBFORMAT, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_CHANNELS, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_RATE, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_PERIOD_TIME, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_last(pcm, params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL); - assert(err >= 0); - - err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_TICK_TIME, NULL); - assert(err >= 0); +int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, + struct snd_pcm_hw_params *params) +{ + static int vars[] = { + SNDRV_PCM_HW_PARAM_ACCESS, + SNDRV_PCM_HW_PARAM_FORMAT, + SNDRV_PCM_HW_PARAM_SUBFORMAT, + SNDRV_PCM_HW_PARAM_CHANNELS, + SNDRV_PCM_HW_PARAM_RATE, + SNDRV_PCM_HW_PARAM_PERIOD_TIME, + SNDRV_PCM_HW_PARAM_BUFFER_SIZE, + SNDRV_PCM_HW_PARAM_TICK_TIME, + -1 + }; + int err, *v; + for (v = vars; *v != -1; v++) { + if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) + err = snd_pcm_hw_param_first(pcm, params, *v, NULL); + else + err = snd_pcm_hw_param_last(pcm, params, *v, NULL); + if (snd_BUG_ON(err < 0)) + return err; + } return 0; } -#undef snd_pcm_t -#undef assert - -static int snd_pcm_lib_ioctl_reset(snd_pcm_substream_t *substream, +static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, void *arg) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; unsigned long flags; snd_pcm_stream_lock_irqsave(substream, flags); if (snd_pcm_running(substream) && snd_pcm_update_hw_ptr(substream) >= 0) runtime->status->hw_ptr %= runtime->buffer_size; - else + else { runtime->status->hw_ptr = 0; + runtime->hw_ptr_wrap = 0; + } snd_pcm_stream_unlock_irqrestore(substream, flags); return 0; } -static int snd_pcm_lib_ioctl_channel_info(snd_pcm_substream_t *substream, +static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, void *arg) { - snd_pcm_channel_info_t *info = arg; - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_channel_info *info = arg; + struct snd_pcm_runtime *runtime = substream->runtime; int width; if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { info->offset = -1; @@ -1946,6 +1777,23 @@ static int snd_pcm_lib_ioctl_channel_info(snd_pcm_substream_t *substream, return 0; } +static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, + void *arg) +{ + struct snd_pcm_hw_params *params = arg; + snd_pcm_format_t format; + int channels, width; + + params->fifo_size = substream->runtime->hw.fifo_size; + if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { + format = params_format(params); + channels = params_channels(params); + width = snd_pcm_format_physical_width(format); + params->fifo_size /= width * channels; + } + return 0; +} + /** * snd_pcm_lib_ioctl - a generic PCM ioctl callback * @substream: the pcm substream instance @@ -1955,9 +1803,9 @@ static int snd_pcm_lib_ioctl_channel_info(snd_pcm_substream_t *substream, * Processes the generic ioctl commands for PCM. * Can be passed as the ioctl callback for PCM ops. * - * Returns zero if successful, or a negative error code on failure. + * Return: Zero if successful, or a negative error code on failure. */ -int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream, +int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) { switch (cmd) { @@ -1967,104 +1815,13 @@ int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream, return snd_pcm_lib_ioctl_reset(substream, arg); case SNDRV_PCM_IOCTL1_CHANNEL_INFO: return snd_pcm_lib_ioctl_channel_info(substream, arg); + case SNDRV_PCM_IOCTL1_FIFO_SIZE: + return snd_pcm_lib_ioctl_fifo_size(substream, arg); } return -ENXIO; } -/* - * Conditions - */ - -static void snd_pcm_system_tick_set(snd_pcm_substream_t *substream, - unsigned long ticks) -{ - snd_pcm_runtime_t *runtime = substream->runtime; - if (ticks == 0) - del_timer(&runtime->tick_timer); - else { - ticks += (1000000 / HZ) - 1; - ticks /= (1000000 / HZ); - mod_timer(&runtime->tick_timer, jiffies + ticks); - } -} - -/* Temporary alias */ -void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks) -{ - snd_pcm_system_tick_set(substream, ticks); -} - -void snd_pcm_tick_prepare(snd_pcm_substream_t *substream) -{ - snd_pcm_runtime_t *runtime = substream->runtime; - snd_pcm_uframes_t frames = ULONG_MAX; - snd_pcm_uframes_t avail, dist; - unsigned int ticks; - u_int64_t n; - u_int32_t r; - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - if (runtime->silence_size >= runtime->boundary) { - frames = 1; - } else if (runtime->silence_size > 0 && - runtime->silence_filled < runtime->buffer_size) { - snd_pcm_sframes_t noise_dist; - noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; - snd_assert(noise_dist <= (snd_pcm_sframes_t)runtime->silence_threshold, ); - frames = noise_dist - runtime->silence_threshold; - } - avail = snd_pcm_playback_avail(runtime); - } else { - avail = snd_pcm_capture_avail(runtime); - } - if (avail < runtime->control->avail_min) { - snd_pcm_sframes_t n = runtime->control->avail_min - avail; - if (n > 0 && frames > (snd_pcm_uframes_t)n) - frames = n; - } - if (avail < runtime->buffer_size) { - snd_pcm_sframes_t n = runtime->buffer_size - avail; - if (n > 0 && frames > (snd_pcm_uframes_t)n) - frames = n; - } - if (frames == ULONG_MAX) { - snd_pcm_tick_set(substream, 0); - return; - } - dist = runtime->status->hw_ptr - runtime->hw_ptr_base; - /* Distance to next interrupt */ - dist = runtime->period_size - dist % runtime->period_size; - if (dist <= frames) { - snd_pcm_tick_set(substream, 0); - return; - } - /* the base time is us */ - n = frames; - n *= 1000000; - div64_32(&n, runtime->tick_time * runtime->rate, &r); - ticks = n + (r > 0 ? 1 : 0); - if (ticks < runtime->sleep_min) - ticks = runtime->sleep_min; - snd_pcm_tick_set(substream, (unsigned long) ticks); -} - -void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream) -{ - snd_pcm_runtime_t *runtime; - unsigned long flags; - - snd_assert(substream != NULL, return); - runtime = substream->runtime; - snd_assert(runtime != NULL, return); - - snd_pcm_stream_lock_irqsave(substream, flags); - if (!snd_pcm_running(substream) || - snd_pcm_update_hw_ptr(substream) < 0) - goto _end; - if (runtime->sleep_min) - snd_pcm_tick_prepare(substream); - _end: - snd_pcm_stream_unlock_irqrestore(substream, flags); -} +EXPORT_SYMBOL(snd_pcm_lib_ioctl); /** * snd_pcm_period_elapsed - update the pcm status for the next period @@ -2072,32 +1829,30 @@ void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream) * * This function is called from the interrupt handler when the * PCM has processed the period size. It will update the current - * pointer, set up the tick, wake up sleepers, etc. + * pointer, wake up sleepers, etc. * * Even if more than one periods have elapsed since the last call, you * have to call this only once. */ -void snd_pcm_period_elapsed(snd_pcm_substream_t *substream) +void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) { - snd_pcm_runtime_t *runtime; + struct snd_pcm_runtime *runtime; unsigned long flags; - snd_assert(substream != NULL, return); + if (PCM_RUNTIME_CHECK(substream)) + return; runtime = substream->runtime; - snd_assert(runtime != NULL, return); if (runtime->transfer_ack_begin) runtime->transfer_ack_begin(substream); snd_pcm_stream_lock_irqsave(substream, flags); if (!snd_pcm_running(substream) || - snd_pcm_update_hw_ptr_interrupt(substream) < 0) + snd_pcm_update_hw_ptr0(substream, 1) < 0) goto _end; if (substream->timer_running) snd_timer_interrupt(substream->timer, 1); - if (runtime->sleep_min) - snd_pcm_tick_prepare(substream); _end: snd_pcm_stream_unlock_irqrestore(substream, flags); if (runtime->transfer_ack_end) @@ -2105,12 +1860,106 @@ void snd_pcm_period_elapsed(snd_pcm_substream_t *substream) kill_fasync(&runtime->fasync, SIGIO, POLL_IN); } -static int snd_pcm_lib_write_transfer(snd_pcm_substream_t *substream, +EXPORT_SYMBOL(snd_pcm_period_elapsed); + +/* + * Wait until avail_min data becomes available + * Returns a negative error code if any error occurs during operation. + * The available space is stored on availp. When err = 0 and avail = 0 + * on the capture stream, it indicates the stream is in DRAINING state. + */ +static int wait_for_avail(struct snd_pcm_substream *substream, + snd_pcm_uframes_t *availp) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + wait_queue_t wait; + int err = 0; + snd_pcm_uframes_t avail = 0; + long wait_time, tout; + + init_waitqueue_entry(&wait, current); + set_current_state(TASK_INTERRUPTIBLE); + add_wait_queue(&runtime->tsleep, &wait); + + if (runtime->no_period_wakeup) + wait_time = MAX_SCHEDULE_TIMEOUT; + else { + wait_time = 10; + if (runtime->rate) { + long t = runtime->period_size * 2 / runtime->rate; + wait_time = max(t, wait_time); + } + wait_time = msecs_to_jiffies(wait_time * 1000); + } + + for (;;) { + if (signal_pending(current)) { + err = -ERESTARTSYS; + break; + } + + /* + * We need to check if space became available already + * (and thus the wakeup happened already) first to close + * the race of space already having become available. + * This check must happen after been added to the waitqueue + * and having current state be INTERRUPTIBLE. + */ + if (is_playback) + avail = snd_pcm_playback_avail(runtime); + else + avail = snd_pcm_capture_avail(runtime); + if (avail >= runtime->twake) + break; + snd_pcm_stream_unlock_irq(substream); + + tout = schedule_timeout(wait_time); + + snd_pcm_stream_lock_irq(substream); + set_current_state(TASK_INTERRUPTIBLE); + switch (runtime->status->state) { + case SNDRV_PCM_STATE_SUSPENDED: + err = -ESTRPIPE; + goto _endloop; + case SNDRV_PCM_STATE_XRUN: + err = -EPIPE; + goto _endloop; + case SNDRV_PCM_STATE_DRAINING: + if (is_playback) + err = -EPIPE; + else + avail = 0; /* indicate draining */ + goto _endloop; + case SNDRV_PCM_STATE_OPEN: + case SNDRV_PCM_STATE_SETUP: + case SNDRV_PCM_STATE_DISCONNECTED: + err = -EBADFD; + goto _endloop; + case SNDRV_PCM_STATE_PAUSED: + continue; + } + if (!tout) { + pcm_dbg(substream->pcm, + "%s write error (DMA or IRQ trouble?)\n", + is_playback ? "playback" : "capture"); + err = -EIO; + break; + } + } + _endloop: + set_current_state(TASK_RUNNING); + remove_wait_queue(&runtime->tsleep, &wait); + *availp = avail; + return err; +} + +static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; int err; char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); if (substream->ops->copy) { @@ -2118,32 +1967,30 @@ static int snd_pcm_lib_write_transfer(snd_pcm_substream_t *substream, return err; } else { char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); - snd_assert(runtime->dma_area, return -EFAULT); if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } -typedef int (*transfer_f)(snd_pcm_substream_t *substream, unsigned int hwoff, +typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t size); -static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream, +static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; + snd_pcm_uframes_t avail; int err = 0; if (size == 0) return 0; - if (size > runtime->xfer_align) - size -= size % runtime->xfer_align; snd_pcm_stream_lock_irq(substream); switch (runtime->status->state) { @@ -2162,99 +2009,40 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream, goto _end_unlock; } + runtime->twake = runtime->control->avail_min ? : 1; + if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) + snd_pcm_update_hw_ptr(substream); + avail = snd_pcm_playback_avail(runtime); while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; - snd_pcm_uframes_t avail; snd_pcm_uframes_t cont; - if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING) - snd_pcm_update_hw_ptr(substream); - avail = snd_pcm_playback_avail(runtime); - if (((avail < runtime->control->avail_min && size > avail) || - (size >= runtime->xfer_align && avail < runtime->xfer_align))) { - wait_queue_t wait; - enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state; - long tout; - + if (!avail) { if (nonblock) { err = -EAGAIN; goto _end_unlock; } - - init_waitqueue_entry(&wait, current); - add_wait_queue(&runtime->sleep, &wait); - while (1) { - if (signal_pending(current)) { - state = SIGNALED; - break; - } - set_current_state(TASK_INTERRUPTIBLE); - snd_pcm_stream_unlock_irq(substream); - tout = schedule_timeout(10 * HZ); - snd_pcm_stream_lock_irq(substream); - if (tout == 0) { - if (runtime->status->state != SNDRV_PCM_STATE_PREPARED && - runtime->status->state != SNDRV_PCM_STATE_PAUSED) { - state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED; - break; - } - } - switch (runtime->status->state) { - case SNDRV_PCM_STATE_XRUN: - case SNDRV_PCM_STATE_DRAINING: - state = ERROR; - goto _end_loop; - case SNDRV_PCM_STATE_SUSPENDED: - state = SUSPENDED; - goto _end_loop; - case SNDRV_PCM_STATE_SETUP: - state = DROPPED; - goto _end_loop; - default: - break; - } - avail = snd_pcm_playback_avail(runtime); - if (avail >= runtime->control->avail_min) { - state = READY; - break; - } - } - _end_loop: - remove_wait_queue(&runtime->sleep, &wait); - - switch (state) { - case ERROR: - err = -EPIPE; - goto _end_unlock; - case SUSPENDED: - err = -ESTRPIPE; - goto _end_unlock; - case SIGNALED: - err = -ERESTARTSYS; - goto _end_unlock; - case EXPIRED: - snd_printd("playback write error (DMA or IRQ trouble?)\n"); - err = -EIO; - goto _end_unlock; - case DROPPED: - err = -EBADFD; + runtime->twake = min_t(snd_pcm_uframes_t, size, + runtime->control->avail_min ? : 1); + err = wait_for_avail(substream, &avail); + if (err < 0) goto _end_unlock; - default: - break; - } } - if (avail > runtime->xfer_align) - avail -= avail % runtime->xfer_align; frames = size > avail ? avail : size; cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; if (frames > cont) frames = cont; - snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL); + if (snd_BUG_ON(!frames)) { + runtime->twake = 0; + snd_pcm_stream_unlock_irq(substream); + return -EINVAL; + } appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); - if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) - goto _end; + err = transfer(substream, appl_ofs, data, offset, frames); snd_pcm_stream_lock_irq(substream); + if (err < 0) + goto _end_unlock; switch (runtime->status->state) { case SNDRV_PCM_STATE_XRUN: err = -EPIPE; @@ -2275,47 +2063,47 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream, offset += frames; size -= frames; xfer += frames; + avail -= frames; if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { err = snd_pcm_start(substream); if (err < 0) goto _end_unlock; } - if (runtime->sleep_min && - runtime->status->state == SNDRV_PCM_STATE_RUNNING) - snd_pcm_tick_prepare(substream); } _end_unlock: + runtime->twake = 0; + if (xfer > 0 && err >= 0) + snd_pcm_update_state(substream, runtime); snd_pcm_stream_unlock_irq(substream); - _end: return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } -snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream, const void __user *buf, snd_pcm_uframes_t size) +/* sanity-check for read/write methods */ +static int pcm_sanity_check(struct snd_pcm_substream *substream) { - snd_pcm_runtime_t *runtime; - int nonblock; - - snd_assert(substream != NULL, return -ENXIO); + struct snd_pcm_runtime *runtime; + if (PCM_RUNTIME_CHECK(substream)) + return -ENXIO; runtime = substream->runtime; - snd_assert(runtime != NULL, return -ENXIO); - snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); + if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) + return -EINVAL; if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; + return 0; +} - snd_assert(substream->ffile != NULL, return -ENXIO); - nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); -#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) - if (substream->oss.oss) { - snd_pcm_oss_setup_t *setup = substream->oss.setup; - if (setup != NULL) { - if (setup->nonblock) - nonblock = 1; - else if (setup->block) - nonblock = 0; - } - } -#endif +snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) +{ + struct snd_pcm_runtime *runtime; + int nonblock; + int err; + + err = pcm_sanity_check(substream); + if (err < 0) + return err; + runtime = substream->runtime; + nonblock = !!(substream->f_flags & O_NONBLOCK); if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && runtime->channels > 1) @@ -2324,18 +2112,21 @@ snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream, const void _ snd_pcm_lib_write_transfer); } -static int snd_pcm_lib_writev_transfer(snd_pcm_substream_t *substream, +EXPORT_SYMBOL(snd_pcm_lib_write); + +static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; int err; void __user **bufs = (void __user **)data; int channels = runtime->channels; int c; if (substream->ops->copy) { - snd_assert(substream->ops->silence != NULL, return -EINVAL); + if (snd_BUG_ON(!substream->ops->silence)) + return -EINVAL; for (c = 0; c < channels; ++c, ++bufs) { if (*bufs == NULL) { if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) @@ -2349,7 +2140,6 @@ static int snd_pcm_lib_writev_transfer(snd_pcm_substream_t *substream, } else { /* default transfer behaviour */ size_t dma_csize = runtime->dma_bytes / channels; - snd_assert(runtime->dma_area, return -EFAULT); for (c = 0; c < channels; ++c, ++bufs) { char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); if (*bufs == NULL) { @@ -2364,33 +2154,19 @@ static int snd_pcm_lib_writev_transfer(snd_pcm_substream_t *substream, return 0; } -snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream, +snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, void __user **bufs, snd_pcm_uframes_t frames) { - snd_pcm_runtime_t *runtime; + struct snd_pcm_runtime *runtime; int nonblock; + int err; - snd_assert(substream != NULL, return -ENXIO); + err = pcm_sanity_check(substream); + if (err < 0) + return err; runtime = substream->runtime; - snd_assert(runtime != NULL, return -ENXIO); - snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); - if (runtime->status->state == SNDRV_PCM_STATE_OPEN) - return -EBADFD; - - snd_assert(substream->ffile != NULL, return -ENXIO); - nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); -#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) - if (substream->oss.oss) { - snd_pcm_oss_setup_t *setup = substream->oss.setup; - if (setup != NULL) { - if (setup->nonblock) - nonblock = 1; - else if (setup->block) - nonblock = 0; - } - } -#endif + nonblock = !!(substream->f_flags & O_NONBLOCK); if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) return -EINVAL; @@ -2398,12 +2174,14 @@ snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream, nonblock, snd_pcm_lib_writev_transfer); } -static int snd_pcm_lib_read_transfer(snd_pcm_substream_t *substream, +EXPORT_SYMBOL(snd_pcm_lib_writev); + +static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; int err; char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); if (substream->ops->copy) { @@ -2411,28 +2189,26 @@ static int snd_pcm_lib_read_transfer(snd_pcm_substream_t *substream, return err; } else { char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); - snd_assert(runtime->dma_area, return -EFAULT); if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } -static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream, +static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; + snd_pcm_uframes_t avail; int err = 0; if (size == 0) return 0; - if (size > runtime->xfer_align) - size -= size % runtime->xfer_align; snd_pcm_stream_lock_irq(substream); switch (runtime->status->state) { @@ -2458,106 +2234,47 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream, goto _end_unlock; } + runtime->twake = runtime->control->avail_min ? : 1; + if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) + snd_pcm_update_hw_ptr(substream); + avail = snd_pcm_capture_avail(runtime); while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; - snd_pcm_uframes_t avail; snd_pcm_uframes_t cont; - if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING) - snd_pcm_update_hw_ptr(substream); - __draining: - avail = snd_pcm_capture_avail(runtime); - if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { - if (avail < runtime->xfer_align) { - err = -EPIPE; + if (!avail) { + if (runtime->status->state == + SNDRV_PCM_STATE_DRAINING) { + snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); goto _end_unlock; } - } else if ((avail < runtime->control->avail_min && size > avail) || - (size >= runtime->xfer_align && avail < runtime->xfer_align)) { - wait_queue_t wait; - enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state; - long tout; - if (nonblock) { err = -EAGAIN; goto _end_unlock; } - - init_waitqueue_entry(&wait, current); - add_wait_queue(&runtime->sleep, &wait); - while (1) { - if (signal_pending(current)) { - state = SIGNALED; - break; - } - set_current_state(TASK_INTERRUPTIBLE); - snd_pcm_stream_unlock_irq(substream); - tout = schedule_timeout(10 * HZ); - snd_pcm_stream_lock_irq(substream); - if (tout == 0) { - if (runtime->status->state != SNDRV_PCM_STATE_PREPARED && - runtime->status->state != SNDRV_PCM_STATE_PAUSED) { - state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED; - break; - } - } - switch (runtime->status->state) { - case SNDRV_PCM_STATE_XRUN: - state = ERROR; - goto _end_loop; - case SNDRV_PCM_STATE_SUSPENDED: - state = SUSPENDED; - goto _end_loop; - case SNDRV_PCM_STATE_DRAINING: - goto __draining; - case SNDRV_PCM_STATE_SETUP: - state = DROPPED; - goto _end_loop; - default: - break; - } - avail = snd_pcm_capture_avail(runtime); - if (avail >= runtime->control->avail_min) { - state = READY; - break; - } - } - _end_loop: - remove_wait_queue(&runtime->sleep, &wait); - - switch (state) { - case ERROR: - err = -EPIPE; - goto _end_unlock; - case SUSPENDED: - err = -ESTRPIPE; - goto _end_unlock; - case SIGNALED: - err = -ERESTARTSYS; - goto _end_unlock; - case EXPIRED: - snd_printd("capture read error (DMA or IRQ trouble?)\n"); - err = -EIO; - goto _end_unlock; - case DROPPED: - err = -EBADFD; + runtime->twake = min_t(snd_pcm_uframes_t, size, + runtime->control->avail_min ? : 1); + err = wait_for_avail(substream, &avail); + if (err < 0) goto _end_unlock; - default: - break; - } + if (!avail) + continue; /* draining */ } - if (avail > runtime->xfer_align) - avail -= avail % runtime->xfer_align; frames = size > avail ? avail : size; cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; if (frames > cont) frames = cont; - snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL); + if (snd_BUG_ON(!frames)) { + runtime->twake = 0; + snd_pcm_stream_unlock_irq(substream); + return -EINVAL; + } appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); - if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) - goto _end; + err = transfer(substream, appl_ofs, data, offset, frames); snd_pcm_stream_lock_irq(substream); + if (err < 0) + goto _end_unlock; switch (runtime->status->state) { case SNDRV_PCM_STATE_XRUN: err = -EPIPE; @@ -2578,52 +2295,40 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream, offset += frames; size -= frames; xfer += frames; - if (runtime->sleep_min && - runtime->status->state == SNDRV_PCM_STATE_RUNNING) - snd_pcm_tick_prepare(substream); + avail -= frames; } _end_unlock: + runtime->twake = 0; + if (xfer > 0 && err >= 0) + snd_pcm_update_state(substream, runtime); snd_pcm_stream_unlock_irq(substream); - _end: return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } -snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream, void __user *buf, snd_pcm_uframes_t size) +snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) { - snd_pcm_runtime_t *runtime; + struct snd_pcm_runtime *runtime; int nonblock; + int err; - snd_assert(substream != NULL, return -ENXIO); + err = pcm_sanity_check(substream); + if (err < 0) + return err; runtime = substream->runtime; - snd_assert(runtime != NULL, return -ENXIO); - snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); - if (runtime->status->state == SNDRV_PCM_STATE_OPEN) - return -EBADFD; - - snd_assert(substream->ffile != NULL, return -ENXIO); - nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); -#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) - if (substream->oss.oss) { - snd_pcm_oss_setup_t *setup = substream->oss.setup; - if (setup != NULL) { - if (setup->nonblock) - nonblock = 1; - else if (setup->block) - nonblock = 0; - } - } -#endif + nonblock = !!(substream->f_flags & O_NONBLOCK); if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) return -EINVAL; return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); } -static int snd_pcm_lib_readv_transfer(snd_pcm_substream_t *substream, +EXPORT_SYMBOL(snd_pcm_lib_read); + +static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { - snd_pcm_runtime_t *runtime = substream->runtime; + struct snd_pcm_runtime *runtime = substream->runtime; int err; void __user **bufs = (void __user **)data; int channels = runtime->channels; @@ -2639,7 +2344,6 @@ static int snd_pcm_lib_readv_transfer(snd_pcm_substream_t *substream, } } else { snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; - snd_assert(runtime->dma_area, return -EFAULT); for (c = 0; c < channels; ++c, ++bufs) { char *hwbuf; char __user *buf; @@ -2655,85 +2359,238 @@ static int snd_pcm_lib_readv_transfer(snd_pcm_substream_t *substream, return 0; } -snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream, +snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, void __user **bufs, snd_pcm_uframes_t frames) { - snd_pcm_runtime_t *runtime; + struct snd_pcm_runtime *runtime; int nonblock; + int err; - snd_assert(substream != NULL, return -ENXIO); + err = pcm_sanity_check(substream); + if (err < 0) + return err; runtime = substream->runtime; - snd_assert(runtime != NULL, return -ENXIO); - snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; - snd_assert(substream->ffile != NULL, return -ENXIO); - nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); -#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) - if (substream->oss.oss) { - snd_pcm_oss_setup_t *setup = substream->oss.setup; - if (setup != NULL) { - if (setup->nonblock) - nonblock = 1; - else if (setup->block) - nonblock = 0; - } - } -#endif - + nonblock = !!(substream->f_flags & O_NONBLOCK); if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) return -EINVAL; return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); } +EXPORT_SYMBOL(snd_pcm_lib_readv); + /* - * Exported symbols + * standard channel mapping helpers */ -EXPORT_SYMBOL(snd_interval_refine); -EXPORT_SYMBOL(snd_interval_list); -EXPORT_SYMBOL(snd_interval_ratnum); -EXPORT_SYMBOL(_snd_pcm_hw_params_any); -EXPORT_SYMBOL(_snd_pcm_hw_param_min); -EXPORT_SYMBOL(_snd_pcm_hw_param_set); -EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); -EXPORT_SYMBOL(_snd_pcm_hw_param_setinteger); -EXPORT_SYMBOL(snd_pcm_hw_param_value_min); -EXPORT_SYMBOL(snd_pcm_hw_param_value_max); -EXPORT_SYMBOL(snd_pcm_hw_param_mask); -EXPORT_SYMBOL(snd_pcm_hw_param_first); -EXPORT_SYMBOL(snd_pcm_hw_param_last); -EXPORT_SYMBOL(snd_pcm_hw_param_near); -EXPORT_SYMBOL(snd_pcm_hw_param_set); -EXPORT_SYMBOL(snd_pcm_hw_refine); -EXPORT_SYMBOL(snd_pcm_hw_constraints_init); -EXPORT_SYMBOL(snd_pcm_hw_constraints_complete); -EXPORT_SYMBOL(snd_pcm_hw_constraint_list); -EXPORT_SYMBOL(snd_pcm_hw_constraint_step); -EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); -EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); -EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); -EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); -EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); -EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); -EXPORT_SYMBOL(snd_pcm_hw_rule_add); -EXPORT_SYMBOL(snd_pcm_set_ops); -EXPORT_SYMBOL(snd_pcm_set_sync); -EXPORT_SYMBOL(snd_pcm_lib_ioctl); -EXPORT_SYMBOL(snd_pcm_stop); -EXPORT_SYMBOL(snd_pcm_period_elapsed); -EXPORT_SYMBOL(snd_pcm_lib_write); -EXPORT_SYMBOL(snd_pcm_lib_read); -EXPORT_SYMBOL(snd_pcm_lib_writev); -EXPORT_SYMBOL(snd_pcm_lib_readv); -EXPORT_SYMBOL(snd_pcm_lib_buffer_bytes); -EXPORT_SYMBOL(snd_pcm_lib_period_bytes); -/* pcm_memory.c */ -EXPORT_SYMBOL(snd_pcm_lib_preallocate_free_for_all); -EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages); -EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages_for_all); -EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page); -EXPORT_SYMBOL(snd_pcm_lib_malloc_pages); -EXPORT_SYMBOL(snd_pcm_lib_free_pages); +/* default channel maps for multi-channel playbacks, up to 8 channels */ +const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { + { .channels = 1, + .map = { SNDRV_CHMAP_MONO } }, + { .channels = 2, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, + { .channels = 4, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, + SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, + { .channels = 6, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, + SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, + SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, + { .channels = 8, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, + SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, + SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, + SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, + { } +}; +EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); + +/* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ +const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { + { .channels = 1, + .map = { SNDRV_CHMAP_MONO } }, + { .channels = 2, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, + { .channels = 4, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, + SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, + { .channels = 6, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, + SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, + SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, + { .channels = 8, + .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, + SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, + SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, + SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, + { } +}; +EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); + +static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) +{ + if (ch > info->max_channels) + return false; + return !info->channel_mask || (info->channel_mask & (1U << ch)); +} + +static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); + + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 0; + uinfo->count = info->max_channels; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = SNDRV_CHMAP_LAST; + return 0; +} + +/* get callback for channel map ctl element + * stores the channel position firstly matching with the current channels + */ +static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); + unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); + struct snd_pcm_substream *substream; + const struct snd_pcm_chmap_elem *map; + + if (snd_BUG_ON(!info->chmap)) + return -EINVAL; + substream = snd_pcm_chmap_substream(info, idx); + if (!substream) + return -ENODEV; + memset(ucontrol->value.integer.value, 0, + sizeof(ucontrol->value.integer.value)); + if (!substream->runtime) + return 0; /* no channels set */ + for (map = info->chmap; map->channels; map++) { + int i; + if (map->channels == substream->runtime->channels && + valid_chmap_channels(info, map->channels)) { + for (i = 0; i < map->channels; i++) + ucontrol->value.integer.value[i] = map->map[i]; + return 0; + } + } + return -EINVAL; +} + +/* tlv callback for channel map ctl element + * expands the pre-defined channel maps in a form of TLV + */ +static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, + unsigned int size, unsigned int __user *tlv) +{ + struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); + const struct snd_pcm_chmap_elem *map; + unsigned int __user *dst; + int c, count = 0; + + if (snd_BUG_ON(!info->chmap)) + return -EINVAL; + if (size < 8) + return -ENOMEM; + if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) + return -EFAULT; + size -= 8; + dst = tlv + 2; + for (map = info->chmap; map->channels; map++) { + int chs_bytes = map->channels * 4; + if (!valid_chmap_channels(info, map->channels)) + continue; + if (size < 8) + return -ENOMEM; + if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || + put_user(chs_bytes, dst + 1)) + return -EFAULT; + dst += 2; + size -= 8; + count += 8; + if (size < chs_bytes) + return -ENOMEM; + size -= chs_bytes; + count += chs_bytes; + for (c = 0; c < map->channels; c++) { + if (put_user(map->map[c], dst)) + return -EFAULT; + dst++; + } + } + if (put_user(count, tlv + 1)) + return -EFAULT; + return 0; +} + +static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) +{ + struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); + info->pcm->streams[info->stream].chmap_kctl = NULL; + kfree(info); +} + +/** + * snd_pcm_add_chmap_ctls - create channel-mapping control elements + * @pcm: the assigned PCM instance + * @stream: stream direction + * @chmap: channel map elements (for query) + * @max_channels: the max number of channels for the stream + * @private_value: the value passed to each kcontrol's private_value field + * @info_ret: store struct snd_pcm_chmap instance if non-NULL + * + * Create channel-mapping control elements assigned to the given PCM stream(s). + * Return: Zero if successful, or a negative error value. + */ +int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, + const struct snd_pcm_chmap_elem *chmap, + int max_channels, + unsigned long private_value, + struct snd_pcm_chmap **info_ret) +{ + struct snd_pcm_chmap *info; + struct snd_kcontrol_new knew = { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .access = SNDRV_CTL_ELEM_ACCESS_READ | + SNDRV_CTL_ELEM_ACCESS_TLV_READ | + SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, + .info = pcm_chmap_ctl_info, + .get = pcm_chmap_ctl_get, + .tlv.c = pcm_chmap_ctl_tlv, + }; + int err; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + info->pcm = pcm; + info->stream = stream; + info->chmap = chmap; + info->max_channels = max_channels; + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + knew.name = "Playback Channel Map"; + else + knew.name = "Capture Channel Map"; + knew.device = pcm->device; + knew.count = pcm->streams[stream].substream_count; + knew.private_value = private_value; + info->kctl = snd_ctl_new1(&knew, info); + if (!info->kctl) { + kfree(info); + return -ENOMEM; + } + info->kctl->private_free = pcm_chmap_ctl_private_free; + err = snd_ctl_add(pcm->card, info->kctl); + if (err < 0) + return err; + pcm->streams[stream].chmap_kctl = info->kctl; + if (info_ret) + *info_ret = info; + return 0; +} +EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |