linux/include/uapi/sound, branch v3.8

ALSA: Extend chmap definitions for UAC2

2012-11-26T15:18:59Z

USB audio class 2 has more channel map positions than we currently have. Let's add missing definitions. Signed-off-by: Takashi Iwai

ALSA: core: fix 64-bit SNDRV_PCM_IOCTL_STATUS ABI breakage

2012-10-28T08:52:37Z

Commit 4eeaaeaea (ALSA: core: add hooks for audio timestamps) added the new audio_tstamp field to struct snd_pcm_status. However, struct timespec requires 64-bit alignment, so the 64-bit compiler would insert 32 bits of padding before this field, which broke SNDRV_PCM_IOCTL_STATUS with error messages like this: kernel: unknown ioctl = 0x80984120 To solve this, insert the padding explicitly so that it can be taken into account when calculating the ABI structure size. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai

ALSA: core: add hooks for audio timestamps

2012-10-23T14:13:48Z

ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: Pierre-Louis Bossart Signed-off-by: Takashi Iwai

UAPI: (Scripted) Disintegrate include/sound

2012-10-09T08:49:13Z

Signed-off-by: David Howells Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner Acked-by: Michael Kerrisk Acked-by: Paul E. McKenney Acked-by: Dave Jones

UAPI: (Scripted) Set up UAPI Kbuild files

2012-10-02T17:01:35Z

Set up empty UAPI Kbuild files to be populated by the header splitter. Signed-off-by: David Howells Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner Acked-by: Paul E. McKenney Acked-by: Dave Jones