diff options
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 142 |
1 files changed, 110 insertions, 32 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index f42c10a4331..9acc77eae48 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -174,7 +174,7 @@ static void xrun(struct snd_pcm_substream *substream) if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { char name[16]; snd_pcm_debug_name(substream, name, sizeof(name)); - snd_printd(KERN_DEBUG "XRUN: %s\n", name); + pcm_warn(substream->pcm, "XRUN: %s\n", name); dump_stack_on_xrun(substream); } } @@ -184,9 +184,7 @@ static void xrun(struct snd_pcm_substream *substream) do { \ if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ xrun_log_show(substream); \ - if (printk_ratelimit()) { \ - snd_printd("PCM: " fmt, ##args); \ - } \ + pr_err_ratelimited("ALSA: PCM: " fmt, ##args); \ dump_stack_on_xrun(substream); \ } \ } while (0) @@ -253,7 +251,7 @@ static void xrun_log_show(struct snd_pcm_substream *substream) entry = &log->entries[idx]; if (entry->period_size == 0) break; - snd_printd("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " + pr_info("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " "hwptr=%ld/%ld\n", name, entry->in_interrupt ? "[Q] " : "", entry->jiffies, @@ -316,6 +314,8 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, 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; @@ -327,9 +327,14 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, */ pos = substream->ops->pointer(substream); curr_jiffies = jiffies; - if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) + 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); + } + if (pos == SNDRV_PCM_POS_XRUN) { xrun(substream); return -EPIPE; @@ -339,10 +344,10 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, char name[16]; snd_pcm_debug_name(substream, name, sizeof(name)); xrun_log_show(substream); - snd_printd(KERN_ERR "BUG: %s, pos = %ld, " - "buffer size = %ld, period size = %ld\n", - name, pos, runtime->buffer_size, - runtime->period_size); + 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; } @@ -360,8 +365,10 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, 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) + if (hw_base >= runtime->boundary) { hw_base = 0; + crossed_boundary++; + } new_hw_ptr = hw_base + pos; goto __delta; } @@ -371,8 +378,10 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, /* 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) + if (hw_base >= runtime->boundary) { hw_base = 0; + crossed_boundary++; + } new_hw_ptr = hw_base + pos; } __delta: @@ -383,8 +392,8 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { char name[16]; snd_pcm_debug_name(substream, name, sizeof(name)); - snd_printd("%s_update: %s: pos=%u/%u/%u, " - "hwptr=%ld/%ld/%ld/%ld\n", + 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, @@ -410,8 +419,10 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, while (hdelta > xrun_threshold) { delta += runtime->buffer_size; hw_base += runtime->buffer_size; - if (hw_base >= runtime->boundary) + if (hw_base >= runtime->boundary) { hw_base = 0; + crossed_boundary++; + } new_hw_ptr = hw_base + pos; hdelta -= runtime->hw_ptr_buffer_jiffies; } @@ -456,8 +467,10 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, /* 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) + if (new_hw_ptr >= runtime->boundary) { new_hw_ptr -= runtime->boundary; + crossed_boundary--; + } delta--; } /* align hw_base to buffer_size */ @@ -507,9 +520,35 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, runtime->hw_ptr_base = hw_base; runtime->status->hw_ptr = new_hw_ptr; runtime->hw_ptr_jiffies = curr_jiffies; - if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) + 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_state(substream, runtime); } @@ -527,7 +566,8 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) * * Sets the given PCM operators to the pcm instance. */ -void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) +void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, + const struct snd_pcm_ops *ops) { struct snd_pcm_str *stream = &pcm->streams[direction]; struct snd_pcm_substream *substream; @@ -625,7 +665,8 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b, * 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(struct snd_interval *i, const struct snd_interval *v) { @@ -824,7 +865,8 @@ void snd_interval_mulkdiv(const struct snd_interval *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(struct snd_interval *i, unsigned int rats_count, struct snd_ratnum *rats, @@ -942,7 +984,8 @@ EXPORT_SYMBOL(snd_interval_ratnum); * @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(struct snd_interval *i, unsigned int rats_count, struct snd_ratden *rats, @@ -1041,7 +1084,8 @@ static int snd_interval_ratden(struct snd_interval *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(struct snd_interval *i, unsigned int count, const unsigned int *list, unsigned int mask) @@ -1101,7 +1145,7 @@ static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned * @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(struct snd_pcm_runtime *runtime, unsigned int cond, int var, @@ -1159,6 +1203,8 @@ EXPORT_SYMBOL(snd_pcm_hw_rule_add); * @mask: the bitmap mask * * 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(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, u_int32_t mask) @@ -1179,6 +1225,8 @@ int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param * @mask: the 64bit bitmap mask * * 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(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, u_int64_t mask) @@ -1192,6 +1240,7 @@ int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_par return -EINVAL; return 0; } +EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); /** * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval @@ -1199,6 +1248,9 @@ int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_par * @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(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) { @@ -1216,6 +1268,9 @@ EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); * @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(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, unsigned int min, unsigned int max) @@ -1247,6 +1302,8 @@ static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, * @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(struct snd_pcm_runtime *runtime, unsigned int cond, @@ -1281,6 +1338,8 @@ static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, * @cond: condition bits * @var: hw_params variable to apply the ratnums constraint * @r: struct snd_ratnums constriants + * + * Return: Zero if successful, or a negative error code on failure. */ int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, unsigned int cond, @@ -1314,6 +1373,8 @@ static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, * @cond: condition bits * @var: hw_params variable to apply the ratdens constraint * @r: struct snd_ratdens constriants + * + * Return: Zero if successful, or a negative error code on failure. */ int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, unsigned int cond, @@ -1345,6 +1406,8 @@ static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, * @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(struct snd_pcm_runtime *runtime, unsigned int cond, @@ -1373,6 +1436,8 @@ static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, * @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(struct snd_pcm_runtime *runtime, unsigned int cond, @@ -1403,6 +1468,8 @@ static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm * @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(struct snd_pcm_runtime *runtime, unsigned int cond, @@ -1429,6 +1496,8 @@ static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, * 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) @@ -1478,8 +1547,8 @@ EXPORT_SYMBOL(_snd_pcm_hw_params_any); * @var: parameter to retrieve * @dir: pointer to the direction (-1,0,1) or %NULL * - * Return the value for field @var 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. */ int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir) @@ -1550,7 +1619,8 @@ static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, * * 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. */ int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, @@ -1596,7 +1666,8 @@ static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, * * Inside configuration space defined by @params remove from @var all * values < maximum. Reduce configuration space accordingly. - * Return the maximum. + * + * Return: The maximum, or a negative error code on failure. */ int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, @@ -1624,6 +1695,8 @@ EXPORT_SYMBOL(snd_pcm_hw_param_last); * 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(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params) @@ -1661,8 +1734,10 @@ static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, 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; } @@ -1728,7 +1803,7 @@ static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *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(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) @@ -1861,10 +1936,13 @@ static int wait_for_avail(struct snd_pcm_substream *substream, case SNDRV_PCM_STATE_DISCONNECTED: err = -EBADFD; goto _endloop; + case SNDRV_PCM_STATE_PAUSED: + continue; } if (!tout) { - snd_printd("%s write error (DMA or IRQ trouble?)\n", - is_playback ? "playback" : "capture"); + pcm_dbg(substream->pcm, + "%s write error (DMA or IRQ trouble?)\n", + is_playback ? "playback" : "capture"); err = -EIO; break; } @@ -2467,7 +2545,7 @@ static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) * @info_ret: store struct snd_pcm_chmap instance if non-NULL * * Create channel-mapping control elements assigned to the given PCM stream(s). - * Returns zero if succeed, or a negative error value. + * 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, |