diff options
| author | Jaroslav Kysela <perex@perex.cz> | 2024-06-25 19:25:47 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-07-02 09:53:21 +0200 |
| commit | d712c58c55d9a4b4cc88ec2e1f8cd2e3b82359b5 (patch) | |
| tree | 7b818b58b95868265b0d22540667294500266362 /include/sound | |
| parent | f05c1ffc274516ef101d2e0f860bcb9b08c6c622 (diff) | |
ALSA: pcm: optimize and clarify stream synchronization ID API
Optimize the memory usage in struct snd_pcm_runtime - use boolean
value for the standard sync ID scheme.
Introduce snd_pcm_set_sync_per_card function to build synchronization
IDs.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20240625172836.589380-3-perex@perex.cz
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/pcm.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index dbce137d8806..ac8f3aef9205 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -402,7 +402,7 @@ struct snd_pcm_runtime { snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ snd_pcm_uframes_t silence_filled; /* already filled part of silence area */ - unsigned char sync[16]; /* hardware synchronization ID */ + bool std_sync_id; /* hardware synchronization - standard per card ID */ /* -- mmap -- */ struct snd_pcm_mmap_status *status; @@ -1156,7 +1156,18 @@ int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, const struct snd_pcm_ops *ops); -void snd_pcm_set_sync(struct snd_pcm_substream *substream); +void snd_pcm_set_sync_per_card(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, + const unsigned char *id, unsigned int len); +/** + * snd_pcm_set_sync - set the PCM sync id + * @substream: the pcm substream + * + * Use the default PCM sync identifier for the specific card. + */ +static inline void snd_pcm_set_sync(struct snd_pcm_substream *substream) +{ + substream->runtime->std_sync_id = true; +} int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream); |