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More seek support

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This commit is contained in:
Abramo Bagnara 2000-05-29 19:53:30 +00:00
parent d134c45c4e
commit da9be8d3a8
5 changed files with 72 additions and 35 deletions
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23
src/pcm/pcm_plug.c
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@ -612,6 +612,28 @@ static int snd_pcm_plug_channel_setup(snd_pcm_t *pcm, int stream, snd_pcm_channe
return 0;
}
static ssize_t snd_pcm_plug_stream_seek(snd_pcm_t *pcm, int stream, off_t offset)
{
ssize_t ret;
snd_pcm_plug_t *plug = (snd_pcm_plug_t*) &pcm->private;
if (snd_pcm_plug_direct(pcm, stream))
return snd_pcm_seek(plug->slave, stream, offset);
if (offset < 0) {
offset = snd_pcm_plug_slave_size(pcm, stream, -offset);
if (offset < 0)
return offset;
offset = -offset;
} else {
offset = snd_pcm_plug_slave_size(pcm, stream, offset);
if (offset < 0)
return offset;
}
ret = snd_pcm_seek(plug->slave, stream, offset);
if (ret < 0)
return ret;
return snd_pcm_plug_client_size(pcm, stream, ret);
}
ssize_t snd_pcm_plug_writev(snd_pcm_t *pcm, const struct iovec *vector, unsigned long count)
{
snd_pcm_plug_t *plug = (snd_pcm_plug_t*) &pcm->private;
@ -776,6 +798,7 @@ struct snd_pcm_ops snd_pcm_plug_ops = {
stream_drain: snd_pcm_plug_stream_drain,
stream_flush: snd_pcm_plug_stream_flush,
stream_pause: snd_pcm_plug_stream_pause,
stream_seek: snd_pcm_plug_stream_seek,
write: snd_pcm_plug_write,
writev: snd_pcm_plug_writev,
read: snd_pcm_plug_read,