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ALSA: pcm: Add timestamp type to sw_params 

For allowing adjusting the timestamp type on the fly, add it to
sw_params.  The existing ioctl is still kept for compatibility.

Along with this, increment the PCM protocol version.

The extension was suggested by Clemens Ladisch.

Acked-by: Jaroslav Kysela <perex@perex.cz>
Reviewed-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-07-10 09:50:19 +02:00
parent 0ac8a52d45
commit 5646eda585
2 changed files with 7 additions and 2 deletions
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6
include/uapi/sound/asound.h
View File

@ -139,7 +139,7 @@ struct snd_hwdep_dsp_image {
* *
*****************************************************************************/
#define SNDRV_PCM_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 11)
#define SNDRV_PCM_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 12)
typedef unsigned long snd_pcm_uframes_t;
typedef signed long snd_pcm_sframes_t;
@ -391,7 +391,9 @@ struct snd_pcm_sw_params {
snd_pcm_uframes_t silence_threshold; /* min distance from noise for silence filling */
snd_pcm_uframes_t silence_size; /* silence block size */
snd_pcm_uframes_t boundary; /* pointers wrap point */
unsigned char reserved[64]; /* reserved for future */
unsigned int tstamp_type; /* timestamp type */
int pads; /* alignment, reserved */
unsigned char reserved[56]; /* reserved for future */
};
struct snd_pcm_channel_info {

3
sound/core/pcm_native.c
View File

@ -543,6 +543,8 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
return -EINVAL;
if (params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
return -EINVAL;
if (params->avail_min == 0)
return -EINVAL;
if (params->silence_size >= runtime->boundary) {
@ -557,6 +559,7 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
err = 0;
snd_pcm_stream_lock_irq(substream);
runtime->tstamp_mode = params->tstamp_mode;
runtime->tstamp_type = params->tstamp_type;
runtime->period_step = params->period_step;
runtime->control->avail_min = params->avail_min;
runtime->start_threshold = params->start_threshold;