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demux_mkv: support runtime video track switching 

Add code identical to the audio case to also support switching video
tracks at runtime.

Patch by "Hermi".
This commit is contained in:
Uoti Urpala 2011-04-08 02:33:57 +03:00
parent ca5399d04f
commit d4b5ee2cd5
1 changed files with 17 additions and 0 deletions
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17
libmpdemux/demux_mkv.c
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@ -184,6 +184,7 @@ typedef struct mkv_demuxer {
int v_skip_to_keyframe, a_skip_to_keyframe;
int num_audio_tracks;
int num_video_tracks;
} mkv_demuxer_t;
#define REALHEADER_SIZE 16
@ -1112,6 +1113,7 @@ static void display_create_tracks(demuxer_t *demuxer)
str);
}
mkv_d->num_audio_tracks = aid;
mkv_d->num_video_tracks = vid;
}
typedef struct {
@ -2482,6 +2484,21 @@ static int demux_mkv_control(demuxer_t *demuxer, int cmd, void *arg)
demuxer->audio->id = new_aid;
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_SWITCH_VIDEO:;
int new_vid = *(int *) arg;
int current_vid = demuxer->video->id;
if (current_vid < 0)
current_vid = -1;
if (new_vid == -1) // cycle to next
new_vid = (current_vid + 2) % (mkv_d->num_video_tracks + 1) - 1;
if (new_vid < 0 || new_vid >= mkv_d->num_video_tracks)
new_vid = -2;
*(int *) arg = new_vid;
if (current_vid != new_vid)
ds_free_packs(demuxer->video);
demuxer->video->id = new_vid;
return DEMUXER_CTRL_OK;
default:
return DEMUXER_CTRL_NOTIMPL;
}