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tv: add hack in preparation of demux_stream removal

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Currently, all demuxer fill_buffer functions have a demux_stream
parameter. We want to remove that, but the TV code still depends on
it. Add a hack to remove that dependency.

The problem with the TV code is that reading video and audio frames
blocks, so in order to avoid a deadlock, you should read either of
them only if the decoder actually requests new data.
This commit is contained in:
wm4 2013-07-11 19:17:05 +02:00
parent 11383696db
commit fa74be880c
3 changed files with 25 additions and 4 deletions
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7
demux/demux.c
View File

@ -559,6 +559,13 @@ bool demux_has_packet(struct sh_stream *sh)
return ds && ds->head;
}
// Same as demux_has_packet, but to be called internally by demuxers, as
// opposed to the user of the demuxer.
bool demuxer_stream_has_packets_queued(struct demuxer *d, struct sh_stream *stream)
{
return demux_has_packet(stream);
}
// ====================================================================
void demuxer_help(void)

1
demux/demux.h
View File

@ -317,6 +317,7 @@ 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);
bool demuxer_stream_has_packets_queued(struct demuxer *d, struct sh_stream *stream);
void demux_packet_list_sort(struct demux_packet **pkts, int num_pkts);
void demux_packet_list_seek(struct demux_packet **pkts, int num_pkts,

21
stream/tv.c
View File

@ -215,10 +215,23 @@ static int demux_tv_fill_buffer(demuxer_t *demux, demux_stream_t *ds)
tvi_handle_t *tvh=(tvi_handle_t*)(demux->priv);
demux_packet_t* dp;
unsigned int len=0;
struct sh_stream *want_audio = NULL, *want_video = NULL;
for (int n = 0; n < demux->num_streams; n++) {
struct sh_stream *sh = demux->streams[n];
if (!demuxer_stream_has_packets_queued(demux, sh) &&
demuxer_stream_is_selected(demux, sh))
{
if (sh->type == STREAM_AUDIO)
want_audio = sh;
if (sh->type == STREAM_VIDEO)
want_video = sh;
}
}
/* ================== ADD AUDIO PACKET =================== */
if (ds==demux->audio && tvh->tv_param->noaudio == 0 &&
if (want_audio && tvh->tv_param->noaudio == 0 &&
tvh->functions->control(tvh->priv,
TVI_CONTROL_IS_AUDIO, 0) == TVI_CONTROL_TRUE)
{
@ -227,19 +240,19 @@ static int demux_tv_fill_buffer(demuxer_t *demux, demux_stream_t *ds)
dp=new_demux_packet(len);
dp->keyframe = true;
dp->pts=tvh->functions->grab_audio_frame(tvh->priv, dp->buffer,len);
ds_add_packet(demux->audio,dp);
demuxer_add_packet(demux, want_audio, dp);
}
/* ================== ADD VIDEO PACKET =================== */
if (ds==demux->video && tvh->functions->control(tvh->priv,
if (want_video && tvh->functions->control(tvh->priv,
TVI_CONTROL_IS_VIDEO, 0) == TVI_CONTROL_TRUE)
{
len = tvh->functions->get_video_framesize(tvh->priv);
dp=new_demux_packet(len);
dp->keyframe = true;
dp->pts=tvh->functions->grab_video_frame(tvh->priv, dp->buffer, len);
ds_add_packet(demux->video,dp);
demuxer_add_packet(demux, want_video, dp);
}
if (tvh->tv_param->scan) tv_scan(tvh);