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pcm: add support for get/set_audio_htstamp_config

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Enable kernel-side functionality by letting user select what sort of
timestamp it desires

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Pierre-Louis Bossart 2015-07-01 15:40:55 -05:00 • committed by Takashi Iwai
parent 6cb31b4444
commit 6ec2464f39
2 changed files with 82 additions and 0 deletions
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44
include/pcm.h
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@ -330,6 +330,26 @@ typedef enum _snd_pcm_tstamp_type {
SND_PCM_TSTAMP_TYPE_LAST = SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW,
} snd_pcm_tstamp_type_t;
typedef struct _snd_pcm_audio_tstamp_config {
/* 5 of max 16 bits used */
unsigned int type_requested:4;
unsigned int report_delay:1; /* add total delay to A/D or D/A */
} snd_pcm_audio_tstamp_config_t;
typedef struct _snd_pcm_audio_tstamp_report {
/* 6 of max 16 bits used for bit-fields */
/* for backwards compatibility */
unsigned int valid:1;
/* actual type if hardware could not support requested timestamp */
unsigned int actual_type:4;
/* accuracy represented in ns units */
unsigned int accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
unsigned int accuracy; /* up to 4.29s, will be packed in separate field */
} snd_pcm_audio_tstamp_report_t;
/** Unsigned frames quantity */
typedef unsigned long snd_pcm_uframes_t;
/** Signed frames quantity */
@ -981,6 +1001,30 @@ void snd_pcm_status_get_trigger_htstamp(const snd_pcm_status_t *obj, snd_htimest
void snd_pcm_status_get_tstamp(const snd_pcm_status_t *obj, snd_timestamp_t *ptr);
void snd_pcm_status_get_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
void snd_pcm_status_get_audio_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
void snd_pcm_status_get_driver_htstamp(const snd_pcm_status_t *obj, snd_htimestamp_t *ptr);
void snd_pcm_status_get_audio_htstamp_report(const snd_pcm_status_t *obj,
snd_pcm_audio_tstamp_report_t *audio_tstamp_report);
void snd_pcm_status_set_audio_htstamp_config(snd_pcm_status_t *obj,
snd_pcm_audio_tstamp_config_t *audio_tstamp_config);
static inline void snd_pcm_pack_audio_tstamp_config(unsigned int *data,
snd_pcm_audio_tstamp_config_t *config)
{
*data = config->report_delay;
*data <<= 4;
*data |= config->type_requested;
}
static inline void snd_pcm_unpack_audio_tstamp_report(unsigned int data, unsigned int accuracy,
snd_pcm_audio_tstamp_report_t *report)
{
data >>= 16;
report->valid = data & 1;
report->actual_type = (data >> 1) & 0xF;
report->accuracy_report = (data >> 5) & 1;
report->accuracy = accuracy;
}
snd_pcm_sframes_t snd_pcm_status_get_delay(const snd_pcm_status_t *obj);
snd_pcm_uframes_t snd_pcm_status_get_avail(const snd_pcm_status_t *obj);
snd_pcm_uframes_t snd_pcm_status_get_avail_max(const snd_pcm_status_t *obj);