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demux: add functions to simplify demuxers

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Some preparations to simplify demux_mkv and demux_lavf.

struct demux_stream manages state for each stream type that is being
demuxed (audio/video/sub). demux_stream is rather annoying, especially
the id and sh members, which are often used by the demuxers to determine
current stream and so on. Demuxers don't really have to access this,
except for testing whether a stream is selected and to add packets.

Add a new_sh_stream(), which allows creating streams without having the
caller specify any kind of stream ID. Demuxers should just use sh_stream
pointers, instead of multiple kinds of IDs and indexes.
This commit is contained in:
wm4 2013-04-14 19:19:35 +02:00
parent 06eee1b675
commit 654c34f771
3 changed files with 47 additions and 7 deletions
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49
demux/demux.c
View File

@ -287,11 +287,16 @@ const char *sh_sub_type2str(int type)
return "unknown";
}
static struct sh_stream *new_sh_stream(demuxer_t *demuxer,
enum stream_type type,
int stream_index,
int tid)
static struct sh_stream *new_sh_stream_id(demuxer_t *demuxer,
enum stream_type type,
int stream_index,
int tid)
{
if (demuxer->num_streams > MAX_SH_STREAMS) {
mp_msg(MSGT_DEMUXER, MSGL_WARN, "Too many streams.");
return NULL;
}
struct sh_stream *sh = talloc_struct(demuxer, struct sh_stream, {
.type = type,
.demuxer = demuxer,
@ -339,6 +344,17 @@ static struct sh_stream *new_sh_stream(demuxer_t *demuxer,
return sh;
}
// This is what "modern" demuxers are supposed to use.
struct sh_stream *new_sh_stream(demuxer_t *demuxer, enum stream_type type)
{
int num = 0;
for (int n = 0; n < demuxer->num_streams; n++) {
if (demuxer->streams[n]->type == type)
num++;
}
return new_sh_stream_id(demuxer, type, demuxer->num_streams, num);
}
static void free_sh_stream(struct sh_stream *sh)
{
if (sh->lav_headers) {
@ -358,7 +374,7 @@ sh_sub_t *new_sh_sub_sid(demuxer_t *demuxer, int id, int sid)
if (demuxer->s_streams[id])
mp_msg(MSGT_DEMUXER, MSGL_WARN, "Sub stream %i redefined\n", id);
else {
new_sh_stream(demuxer, STREAM_SUB, id, sid);
new_sh_stream_id(demuxer, STREAM_SUB, id, sid);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SUBTITLE_ID=%d\n", sid);
}
return demuxer->s_streams[id];
@ -395,7 +411,7 @@ sh_audio_t *new_sh_audio_aid(demuxer_t *demuxer, int id, int aid)
mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "WARNING: Audio stream header %d redefined.\n", id);
} else {
mp_tmsg(MSGT_DEMUXER, MSGL_V, "==> Found audio stream: %d\n", id);
new_sh_stream(demuxer, STREAM_AUDIO, id, aid);
new_sh_stream_id(demuxer, STREAM_AUDIO, id, aid);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AUDIO_ID=%d\n", aid);
}
return demuxer->a_streams[id];
@ -424,7 +440,7 @@ sh_video_t *new_sh_video_vid(demuxer_t *demuxer, int id, int vid)
mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "WARNING: Video stream header %d redefined.\n", id);
else {
mp_tmsg(MSGT_DEMUXER, MSGL_V, "==> Found video stream: %d\n", id);
new_sh_stream(demuxer, STREAM_VIDEO, id, vid);
new_sh_stream_id(demuxer, STREAM_VIDEO, id, vid);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VIDEO_ID=%d\n", vid);
}
return demuxer->v_streams[id];
@ -463,6 +479,15 @@ void free_demuxer(demuxer_t *demuxer)
talloc_free(demuxer);
}
void demuxer_add_packet(demuxer_t *demuxer, struct sh_stream *stream,
demux_packet_t *dp)
{
if (!demuxer_stream_is_selected(demuxer, stream)) {
free_demux_packet(dp);
} else {
ds_add_packet(demuxer->ds[stream->type], dp);
}
}
void ds_add_packet(demux_stream_t *ds, demux_packet_t *dp)
{
@ -1261,6 +1286,16 @@ void demuxer_switch_track(struct demuxer *demuxer, enum stream_type type,
}
}
bool demuxer_stream_is_selected(struct demuxer *d, struct sh_stream *stream)
{
if (!stream)
return false;
int st_id = stream->tid;
if (stream->type == STREAM_SUB) // major braindeath
st_id = stream->stream_index;
return d->ds[stream->type]->id == st_id;
}
int demuxer_add_attachment(demuxer_t *demuxer, struct bstr name,
struct bstr type, struct bstr data)
{

4
demux/demux.h
View File

@ -311,6 +311,8 @@ void free_demuxer(struct demuxer *demuxer);
struct sh_stream *ds_gsh(struct demux_stream *ds);
void demuxer_add_packet(demuxer_t *demuxer, struct sh_stream *stream,
demux_packet_t *dp);
void ds_add_packet(struct demux_stream *ds, struct demux_packet *dp);
void ds_read_packet(struct demux_stream *ds, struct stream *stream, int len,
double pts, int64_t pos, bool keyframe);
@ -419,4 +421,6 @@ int demuxer_angles_count(struct demuxer *demuxer);
struct sh_stream *demuxer_stream_by_demuxer_id(struct demuxer *d,
enum stream_type t, int id);
bool demuxer_stream_is_selected(struct demuxer *d, struct sh_stream *stream);
#endif /* MPLAYER_DEMUXER_H */

1
demux/stheader.h
View File

@ -190,6 +190,7 @@ struct sh_video *new_sh_video_vid(struct demuxer *demuxer, int id, int vid);
struct sh_sub *new_sh_sub_sid(struct demuxer *demuxer, int id, int sid);
struct sh_sub *new_sh_sub_sid_lang(struct demuxer *demuxer, int id, int sid,
const char *lang);
struct sh_stream *new_sh_stream(struct demuxer *demuxer, enum stream_type type);
const char *sh_sub_type2str(int type);