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Split mmap-emulation code from hw layer

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Move out mmap-emulation code from hw layer to its own plugin.
This cleans up the mess in pcm_hw.c.
This commit is contained in:
Takashi Iwai 2007-07-11 17:44:09 +02:00
parent 9bb7211f21
commit 4cdb17c601
10 changed files with 534 additions and 253 deletions
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10
src/pcm/pcm_mmap.c
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@ -531,7 +531,8 @@ int snd_pcm_munmap(snd_pcm_t *pcm)
return 0;
}
snd_pcm_sframes_t snd_pcm_write_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t size)
snd_pcm_sframes_t snd_pcm_write_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_uframes_t xfer = 0;
snd_pcm_sframes_t err = 0;
@ -539,7 +540,6 @@ snd_pcm_sframes_t snd_pcm_write_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t size)
return 0;
while (xfer < size) {
snd_pcm_uframes_t frames = size - xfer;
snd_pcm_uframes_t offset = snd_pcm_mmap_hw_offset(pcm);
snd_pcm_uframes_t cont = pcm->buffer_size - offset;
if (cont < frames)
frames = cont;
@ -575,13 +575,15 @@ snd_pcm_sframes_t snd_pcm_write_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t size)
if (err < 0)
break;
xfer += frames;
offset += frames;
}
if (xfer > 0)
return xfer;
return err;
}
snd_pcm_sframes_t snd_pcm_read_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t size)
snd_pcm_sframes_t snd_pcm_read_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_uframes_t xfer = 0;
snd_pcm_sframes_t err = 0;
@ -589,7 +591,6 @@ snd_pcm_sframes_t snd_pcm_read_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t size)
return 0;
while (xfer < size) {
snd_pcm_uframes_t frames = size - xfer;
snd_pcm_uframes_t offset = snd_pcm_mmap_hw_offset(pcm);
snd_pcm_uframes_t cont = pcm->buffer_size - offset;
if (cont < frames)
frames = cont;
@ -624,6 +625,7 @@ snd_pcm_sframes_t snd_pcm_read_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t size)
if (err < 0)
break;
xfer += frames;
offset += frames;
}
if (xfer > 0)
return xfer;