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Add cdda stream control for chapter commmands.

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Now we support seek cdda/cddb tracks by seek_chapter command.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25438 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
ulion 2007-12-17 15:20:28 +00:00
parent ab7d5a37ad
commit cc840ba8b2
1 changed files with 48 additions and 0 deletions
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48
stream/stream_cdda.c
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@ -96,6 +96,53 @@ static int seek(stream_t* s,off_t pos);
static int fill_buffer(stream_t* s, char* buffer, int max_len);
static void close_cdda(stream_t* s);
static int get_track_by_sector(cdda_priv *p, unsigned int sector) {
int i;
for (i = p->cd->tracks; i >= 0 ; --i)
if (p->cd->disc_toc[i].dwStartSector <= sector)
break;
return i;
}
static int control(stream_t *stream, int cmd, void *arg) {
cdda_priv* p = stream->priv;
switch(cmd) {
case STREAM_CTRL_GET_NUM_CHAPTERS:
{
int start_track = get_track_by_sector(p, p->start_sector);
int end_track = get_track_by_sector(p, p->end_sector);
*(unsigned int *)arg = end_track + 1 - start_track;
return STREAM_OK;
}
case STREAM_CTRL_SEEK_TO_CHAPTER:
{
int r;
unsigned int track = *(unsigned int *)arg;
int start_track = get_track_by_sector(p, p->start_sector);
int seek_sector;
track += start_track;
if (track >= p->cd->tracks) {
stream->eof = 1;
return STREAM_ERROR;
}
seek_sector = track <= 0 ? p->start_sector
: p->cd->disc_toc[track].dwStartSector;
r = seek(stream, seek_sector * CD_FRAMESIZE_RAW);
if (r)
return STREAM_OK;
break;
}
case STREAM_CTRL_GET_CURRENT_CHAPTER:
{
int start_track = get_track_by_sector(p, p->start_sector);
int cur_track = get_track_by_sector(p, p->sector);
*(unsigned int *)arg = cur_track - start_track;
return STREAM_OK;
}
}
return STREAM_UNSUPPORTED;
}
static int open_cdda(stream_t *st,int m, void* opts, int* file_format) {
struct cdda_params* p = (struct cdda_params*)opts;
int mode = p->paranoia_mode;
@ -267,6 +314,7 @@ static int open_cdda(stream_t *st,int m, void* opts, int* file_format) {
st->fill_buffer = fill_buffer;
st->seek = seek;
st->control = control;
st->close = close_cdda;
*file_format = DEMUXER_TYPE_RAWAUDIO;