[ALSA] PCM interface - rename SNDRV_PCM_TSTAMP_MMAP to SNDRV_PCM_TSTAMP_ENABLE
Change semantics for SNDRV_PCM_TSTAMP_MMAP. Doing timestamping only in the interrupt handler might cause that hw_ptr is not related to actual timestamp. With this change, grab timestamp at every hw_ptr update to have always valid timestamp + ring buffer position pair. With this change, SNDRV_PCM_TSTAMP_MMAP was renamed to SNDRV_PCM_TSTAMP_ENABLE. It's no regression (I think). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
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@@ -144,6 +144,8 @@ static inline snd_pcm_uframes_t snd_pcm_update_hw_ptr_pos(struct snd_pcm_substre
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{
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snd_pcm_uframes_t pos;
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if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
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snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
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pos = substream->ops->pointer(substream);
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if (pos == SNDRV_PCM_POS_XRUN)
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return pos; /* XRUN */
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@@ -186,8 +188,6 @@ static inline int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *subs
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snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt;
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snd_pcm_sframes_t delta;
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if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_MMAP)
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snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
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pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
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if (pos == SNDRV_PCM_POS_XRUN) {
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xrun(substream);
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