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ALSA: pcm: Simplify snd_pcm_playback_silence() 

Use the existing silence helper codes for simplification.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2017-05-24 18:18:15 +02:00
parent 5c7264cfbb
commit a9cd29e799
1 changed files with 20 additions and 30 deletions
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50
sound/core/pcm_lib.c
View File

@ -44,6 +44,9 @@
#define trace_hw_ptr_error(substream, reason)
#endif
static int fill_silence_frames(struct snd_pcm_substream *substream,
snd_pcm_uframes_t off, snd_pcm_uframes_t frames);
/*
* fill ring buffer with silence
* runtime->silence_start: starting pointer to silence area
@ -57,7 +60,6 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t frames, ofs, transfer;
char *hwbuf;
int err;
if (runtime->silence_size < runtime->boundary) {
@ -111,35 +113,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
ofs = runtime->silence_start % runtime->buffer_size;
while (frames > 0) {
transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames;
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) {
if (substream->ops->fill_silence) {
err = substream->ops->fill_silence(substream, 0,
frames_to_bytes(runtime, ofs),
frames_to_bytes(runtime, transfer));
snd_BUG_ON(err < 0);
} else {
hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs);
snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels);
}
} else {
unsigned int c;
unsigned int channels = runtime->channels;
if (substream->ops->fill_silence) {
for (c = 0; c < channels; ++c) {
err = substream->ops->fill_silence(substream, c,
samples_to_bytes(runtime, ofs),
samples_to_bytes(runtime, transfer));
snd_BUG_ON(err < 0);
}
} else {
size_t dma_csize = runtime->dma_bytes / channels;
for (c = 0; c < channels; ++c) {
hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs);
snd_pcm_format_set_silence(runtime->format, hwbuf, transfer);
}
}
}
err = fill_silence_frames(substream, ofs, transfer);
snd_BUG_ON(err < 0);
runtime->silence_filled += transfer;
frames -= transfer;
ofs = 0;
@ -2103,6 +2078,21 @@ static int noninterleaved_copy(struct snd_pcm_substream *substream,
return 0;
}
/* fill silence on the given buffer position;
* called from snd_pcm_playback_silence()
*/
static int fill_silence_frames(struct snd_pcm_substream *substream,
snd_pcm_uframes_t off, snd_pcm_uframes_t frames)
{
if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED)
return interleaved_copy(substream, off, NULL, 0, frames,
fill_silence);
else
return noninterleaved_copy(substream, off, NULL, 0, frames,
fill_silence);
}
/* sanity-check for read/write methods */
static int pcm_sanity_check(struct snd_pcm_substream *substream)
{