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winealsa.drv: Special-case copying common sample sizes in a tight loop.

This commit is contained in:
Andrew Eikum 2012-08-21 13:38:44 -05:00 committed by Alexandre Julliard
parent e282d418e3
commit 19e9de7dde
1 changed files with 51 additions and 6 deletions
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55
dlls/winealsa.drv/mmdevdrv.c
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@ -1828,22 +1828,67 @@ static BYTE *remap_channels(ACImpl *This, BYTE *buf, snd_pcm_uframes_t frames)
if(!This->remapping_buf){
This->remapping_buf = HeapAlloc(GetProcessHeap(), 0,
(This->fmt->wBitsPerSample / 8) * This->alsa_channels * frames);
bytes_per_sample * This->alsa_channels * frames);
This->remapping_buf_frames = frames;
}else if(This->remapping_buf_frames < frames){
This->remapping_buf = HeapReAlloc(GetProcessHeap(), 0, This->remapping_buf,
(This->fmt->wBitsPerSample / 8) * This->alsa_channels * frames);
bytes_per_sample * This->alsa_channels * frames);
This->remapping_buf_frames = frames;
}
snd_pcm_format_set_silence(This->alsa_format, This->remapping_buf,
frames * This->alsa_channels);
switch(This->fmt->wBitsPerSample){
case 8: {
UINT8 *tgt_buf, *src_buf;
tgt_buf = This->remapping_buf;
src_buf = buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < This->fmt->nChannels; ++c){
memcpy(&This->remapping_buf[(i * This->alsa_channels + This->alsa_channel_map[c]) * bytes_per_sample],
&buf[(i * This->fmt->nChannels + c) * bytes_per_sample], bytes_per_sample);
for(c = 0; c < This->fmt->nChannels; ++c)
tgt_buf[This->alsa_channel_map[c]] = src_buf[c];
tgt_buf += This->alsa_channels;
src_buf += This->fmt->nChannels;
}
break;
}
case 16: {
UINT16 *tgt_buf, *src_buf;
tgt_buf = (UINT16*)This->remapping_buf;
src_buf = (UINT16*)buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < This->fmt->nChannels; ++c)
tgt_buf[This->alsa_channel_map[c]] = src_buf[c];
tgt_buf += This->alsa_channels;
src_buf += This->fmt->nChannels;
}
}
break;
case 32: {
UINT32 *tgt_buf, *src_buf;
tgt_buf = (UINT32*)This->remapping_buf;
src_buf = (UINT32*)buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < This->fmt->nChannels; ++c)
tgt_buf[This->alsa_channel_map[c]] = src_buf[c];
tgt_buf += This->alsa_channels;
src_buf += This->fmt->nChannels;
}
}
break;
default: {
BYTE *tgt_buf, *src_buf;
tgt_buf = This->remapping_buf;
src_buf = buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < This->fmt->nChannels; ++c)
memcpy(&tgt_buf[This->alsa_channel_map[c] * bytes_per_sample],
&src_buf[c * bytes_per_sample], bytes_per_sample);
tgt_buf += This->alsa_channels * bytes_per_sample;
src_buf += This->fmt->nChannels * bytes_per_sample;
}
}
break;
}
return This->remapping_buf;