/***********************************************************************
* ReaderFunc
***********************************************************************
*
**********************************************************************/
static void ReaderFunc( void * _r )
{
hb_reader_t * r = _r;
hb_fifo_t ** fifos;
hb_buffer_t * buf;
hb_list_t * list;
int n;
int chapter = -1;
int chapter_end = r->job->chapter_end;
if ( r->title->type == HB_BD_TYPE )
{
if ( !( r->bd = hb_bd_init( r->title->path ) ) )
return;
}
else if ( r->title->type == HB_DVD_TYPE )
{
if ( !( r->dvd = hb_dvd_init( r->title->path ) ) )
return;
}
else if ( r->title->type == HB_STREAM_TYPE ||
r->title->type == HB_FF_STREAM_TYPE )
{
if ( !( r->stream = hb_stream_open( r->title->path, r->title ) ) )
return;
}
else
{
// Unknown type, should never happen
return;
}
if (r->bd)
{
if( !hb_bd_start( r->bd, r->title ) )
{
hb_bd_close( &r->bd );
return;
}
if ( r->job->start_at_preview )
{
// XXX code from DecodePreviews - should go into its own routine
hb_bd_seek( r->bd, (float)r->job->start_at_preview /
( r->job->seek_points ? ( r->job->seek_points + 1.0 ) : 11.0 ) );
}
else if ( r->job->pts_to_start )
{
// Note, bd seeks always put us to an i-frame. no need
// to start decoding early using r->pts_to_start
hb_bd_seek_pts( r->bd, r->job->pts_to_start );
r->job->pts_to_start = 0;
r->start_found = 1;
}
else
{
hb_bd_seek_chapter( r->bd, r->job->chapter_start );
}
if (r->job->angle > 1)
{
hb_bd_set_angle( r->bd, r->job->angle - 1 );
}
}
else if (r->dvd)
{
/*
* XXX this code is a temporary hack that should go away if/when
* chapter merging goes away in libhb/dvd.c
* map the start and end chapter numbers to on-media chapter
* numbers since chapter merging could cause the handbrake numbers
* to diverge from the media numbers and, if our chapter_end is after
* a media chapter that got merged, we'll stop ripping too early.
*/
int start = r->job->chapter_start;
hb_chapter_t *chap = hb_list_item( r->title->list_chapter, chapter_end - 1 );
chapter_end = chap->index;
if (start > 1)
{
chap = hb_list_item( r->title->list_chapter, start - 1 );
start = chap->index;
}
/* end chapter mapping XXX */
if( !hb_dvd_start( r->dvd, r->title, start ) )
{
hb_dvd_close( &r->dvd );
return;
}
if (r->job->angle)
{
hb_dvd_set_angle( r->dvd, r->job->angle );
}
if ( r->job->start_at_preview )
{
// XXX code from DecodePreviews - should go into its own routine
hb_dvd_seek( r->dvd, (float)r->job->start_at_preview /
( r->job->seek_points ? ( r->job->seek_points + 1.0 ) : 11.0 ) );
}
}
else if ( r->stream && r->job->start_at_preview )
{
// XXX code from DecodePreviews - should go into its own routine
hb_stream_seek( r->stream, (float)( r->job->start_at_preview - 1 ) /
( r->job->seek_points ? ( r->job->seek_points + 1.0 ) : 11.0 ) );
}
else if ( r->stream && r->job->pts_to_start )
{
int64_t pts_to_start = r->job->pts_to_start;
// Find out what the first timestamp of the stream is
// and then seek to the appropriate offset from it
if ( ( buf = hb_stream_read( r->stream ) ) )
{
if ( buf->start > 0 )
{
pts_to_start += buf->start;
r->pts_to_start += buf->start;
r->job->pts_to_start += buf->start;
}
}
if ( hb_stream_seek_ts( r->stream, pts_to_start ) >= 0 )
{
// Seek takes us to the nearest I-frame before the timestamp
// that we want. So we will retrieve the start time of the
// first packet we get, subtract that from pts_to_start, and
// inspect the reset of the frames in sync.
r->start_found = 2;
r->job->pts_to_start = pts_to_start;
}
}
else if( r->stream )
{
/*
* Standard stream, seek to the starting chapter, if set, and track the
* end chapter so that we end at the right time.
*/
int start = r->job->chapter_start;
hb_chapter_t *chap = hb_list_item( r->title->list_chapter, chapter_end - 1 );
chapter_end = chap->index;
if (start > 1)
{
chap = hb_list_item( r->title->list_chapter, start - 1 );
start = chap->index;
}
/*
* Seek to the start chapter.
*/
hb_stream_seek_chapter( r->stream, start );
}
list = hb_list_init();
while( !*r->die && !r->job->done )
{
if (r->bd)
chapter = hb_bd_chapter( r->bd );
else if (r->dvd)
chapter = hb_dvd_chapter( r->dvd );
else if (r->stream)
chapter = hb_stream_chapter( r->stream );
if( chapter < 0 )
{
hb_log( "reader: end of the title reached" );
break;
}
if( chapter > chapter_end )
{
hb_log( "reader: end of chapter %d (media %d) reached at media chapter %d",
r->job->chapter_end, chapter_end, chapter );
break;
}
if (r->bd)
{
if( (buf = hb_bd_read( r->bd )) == NULL )
{
break;
}
}
else if (r->dvd)
{
if( (buf = hb_dvd_read( r->dvd )) == NULL )
{
break;
}
}
else if (r->stream)
{
if ( (buf = hb_stream_read( r->stream )) == NULL )
{
break;
}
if ( r->start_found == 2 )
{
// We will inspect the timestamps of each frame in sync
// to skip from this seek point to the timestamp we
// want to start at.
if ( buf->start > 0 && buf->start < r->job->pts_to_start )
{
r->job->pts_to_start -= buf->start;
}
else if ( buf->start >= r->job->pts_to_start )
{
r->job->pts_to_start = 0;
r->start_found = 1;
}
}
}
if( r->job->indepth_scan )
{
/*
* Need to update the progress during a subtitle scan
*/
hb_state_t state;
#define p state.param.working
state.state = HB_STATE_WORKING;
p.progress = (double)chapter / (double)r->job->chapter_end;
if( p.progress > 1.0 )
{
p.progress = 1.0;
}
p.rate_avg = 0.0;
p.hours = -1;
p.minutes = -1;
p.seconds = -1;
hb_set_state( r->job->h, &state );
}
(hb_demux[r->title->demuxer])( buf, list, &r->demux );
while( ( buf = hb_list_item( list, 0 ) ) )
{
hb_list_rem( list, buf );
fifos = GetFifoForId( r->job, buf->id );
if ( fifos && ! r->saw_video && !r->job->indepth_scan )
{
// The first data packet with a PTS from an audio or video stream
// that we're decoding defines 'time zero'. Discard packets until
// we get one.
if ( buf->start != -1 && buf->renderOffset != -1 &&
( buf->id == r->title->video_id || is_audio( r, buf->id ) ) )
{
// force a new scr offset computation
r->scr_changes = r->demux.scr_changes - 1;
// create a stream state if we don't have one so the
// offset will get computed correctly.
id_to_st( r, buf, 1 );
r->saw_video = 1;
hb_log( "reader: first SCR %"PRId64" id 0x%x DTS %"PRId64,
r->demux.last_scr, buf->id, buf->renderOffset );
}
else
{
fifos = NULL;
}
}
if( fifos )
{
if ( buf->renderOffset != -1 )
{
if ( r->scr_changes != r->demux.scr_changes )
{
// This is the first audio or video packet after an SCR
// change. Compute a new scr offset that would make this
// packet follow the last of this stream with the
// correct average spacing.
stream_timing_t *st = id_to_st( r, buf, 0 );
// if this is the video stream and we don't have
// audio yet or this is an audio stream
// generate a new scr
if ( st->is_audio ||
( st == r->stream_timing && !r->saw_audio ) )
{
new_scr_offset( r, buf );
}
else
{
// defer the scr change until we get some
// audio since audio has a timestamp per
// frame but video & subtitles don't. Clear
// the timestamps so the decoder will generate
// them from the frame durations.
buf->start = -1;
buf->renderOffset = -1;
}
}
}
if ( buf->start != -1 )
{
int64_t start = buf->start - r->scr_offset;
if ( !r->start_found )
UpdateState( r, start );
if ( !r->start_found &&
start >= r->pts_to_start )
{
// pts_to_start point found
r->start_found = 1;
}
// This log is handy when you need to debug timing problems
//hb_log("id %x scr_offset %ld start %ld --> %ld",
// buf->id, r->scr_offset, buf->start,
// buf->start - r->scr_offset);
buf->start -= r->scr_offset;
}
if ( buf->renderOffset != -1 )
{
if ( r->scr_changes == r->demux.scr_changes )
{
// This packet is referenced to the same SCR as the last.
// Adjust timestamp to remove the System Clock Reference
// offset then update the average inter-packet time
// for this stream.
buf->renderOffset -= r->scr_offset;
update_ipt( r, buf );
}
}
if ( !r->start_found )
{
hb_buffer_close( &buf );
continue;
}
buf->sequence = r->sequence++;
/* if there are mutiple output fifos, send a copy of the
* buffer down all but the first (we have to not ship the
* original buffer or we'll race with the thread that's
* consuming the buffer & inject garbage into the data stream). */
for( n = 1; fifos[n] != NULL; n++)
{
hb_buffer_t *buf_copy = hb_buffer_init( buf->size );
hb_buffer_copy_settings( buf_copy, buf );
memcpy( buf_copy->data, buf->data, buf->size );
push_buf( r, fifos[n], buf_copy );
}
push_buf( r, fifos[0], buf );
}
else
{
hb_buffer_close( &buf );
}
}
}
// send empty buffers downstream to video & audio decoders to signal we're done.
if( !*r->die && !r->job->done )
{
push_buf( r, r->job->fifo_mpeg2, hb_buffer_init(0) );
hb_audio_t *audio;
for( n = 0; (audio = hb_list_item( r->job->title->list_audio, n)); ++n )
{
if ( audio->priv.fifo_in )
push_buf( r, audio->priv.fifo_in, hb_buffer_init(0) );
}
hb_subtitle_t *subtitle;
for( n = 0; (subtitle = hb_list_item( r->job->title->list_subtitle, n)); ++n )
{
if ( subtitle->fifo_in && subtitle->source == VOBSUB)
push_buf( r, subtitle->fifo_in, hb_buffer_init(0) );
}
}
hb_list_empty( &list );
if (r->bd)
{
hb_bd_stop( r->bd );
hb_bd_close( &r->bd );
}
else if (r->dvd)
{
hb_dvd_stop( r->dvd );
hb_dvd_close( &r->dvd );
}
else if (r->stream)
{
hb_stream_close(&r->stream);
}
if ( r->stream_timing )
{
free( r->stream_timing );
}
hb_log( "reader: done. %d scr changes", r->demux.scr_changes );
if ( r->demux.dts_drops )
{
hb_log( "reader: %d drops because DTS out of range", r->demux.dts_drops );
}
free( r );
_r = NULL;
}
static int reader_work( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out)
{
hb_work_private_t * r = w->private_data;
hb_fifo_t ** fifos;
hb_buffer_t * buf;
hb_buffer_list_t list;
int ii, chapter = -1;
hb_buffer_list_clear(&list);
if (r->bd)
chapter = hb_bd_chapter( r->bd );
else if (r->dvd)
chapter = hb_dvd_chapter( r->dvd );
else if (r->stream)
chapter = hb_stream_chapter( r->stream );
if( chapter < 0 )
{
hb_log( "reader: end of the title reached" );
reader_send_eof(r);
return HB_WORK_DONE;
}
if( chapter > r->chapter_end )
{
hb_log("reader: end of chapter %d (media %d) reached at media chapter %d",
r->job->chapter_end, r->chapter_end, chapter);
reader_send_eof(r);
return HB_WORK_DONE;
}
if (r->bd)
{
if( (buf = hb_bd_read( r->bd )) == NULL )
{
reader_send_eof(r);
return HB_WORK_DONE;
}
}
else if (r->dvd)
{
if( (buf = hb_dvd_read( r->dvd )) == NULL )
{
reader_send_eof(r);
return HB_WORK_DONE;
}
}
else if (r->stream)
{
if ( (buf = hb_stream_read( r->stream )) == NULL )
{
reader_send_eof(r);
return HB_WORK_DONE;
}
}
(hb_demux[r->title->demuxer])(buf, &list, &r->demux);
while ((buf = hb_buffer_list_rem_head(&list)) != NULL)
{
fifos = GetFifoForId( r, buf->s.id );
if (fifos && r->stream && r->start_found == 2 )
{
// We will inspect the timestamps of each frame in sync
// to skip from this seek point to the timestamp we
// want to start at.
if (buf->s.start != AV_NOPTS_VALUE &&
buf->s.start < r->job->pts_to_start)
{
r->job->pts_to_start -= buf->s.start;
}
else if ( buf->s.start >= r->job->pts_to_start )
{
r->job->pts_to_start = 0;
}
r->start_found = 1;
}
if ( fifos && ! r->saw_video && !r->job->indepth_scan )
{
// The first data packet with a PTS from an audio or video stream
// that we're decoding defines 'time zero'. Discard packets until
// we get one.
if (buf->s.start != AV_NOPTS_VALUE &&
buf->s.renderOffset != AV_NOPTS_VALUE &&
(buf->s.id == r->title->video_id ||
is_audio( r, buf->s.id)))
{
// force a new scr offset computation
r->scr_changes = r->demux.scr_changes - 1;
// create a stream state if we don't have one so the
// offset will get computed correctly.
id_to_st( r, buf, 1 );
r->saw_video = 1;
hb_log( "reader: first SCR %"PRId64" id 0x%x DTS %"PRId64,
r->demux.last_scr, buf->s.id, buf->s.renderOffset );
}
else
{
fifos = NULL;
}
}
if ( r->job->indepth_scan || fifos )
{
if ( buf->s.renderOffset != AV_NOPTS_VALUE )
{
if ( r->scr_changes != r->demux.scr_changes )
{
// This is the first audio or video packet after an SCR
// change. Compute a new scr offset that would make this
// packet follow the last of this stream with the
// correct average spacing.
stream_timing_t *st = id_to_st( r, buf, 0 );
// if this is the video stream and we don't have
// audio yet or this is an audio stream
// generate a new scr
if ( st->is_audio ||
( st == r->stream_timing && !r->saw_audio ) )
{
new_scr_offset( r, buf );
r->sub_scr_set = 0;
}
else
{
// defer the scr change until we get some
// audio since audio has a timestamp per
// frame but video & subtitles don't. Clear
// the timestamps so the decoder will generate
// them from the frame durations.
if (is_subtitle(r, buf->s.id) &&
buf->s.start != AV_NOPTS_VALUE)
{
if (!r->sub_scr_set)
{
// We can't generate timestamps in the
// subtitle decoder as we can for
// audio & video. So we need to make
// the closest guess that we can
// for the subtitles start time here.
int64_t last = r->stream_timing[0].last;
r->scr_offset = buf->s.start - last;
r->sub_scr_set = 1;
}
}
else
{
buf->s.start = AV_NOPTS_VALUE;
buf->s.renderOffset = AV_NOPTS_VALUE;
}
}
}
}
if ( buf->s.start != AV_NOPTS_VALUE )
{
int64_t start = buf->s.start - r->scr_offset;
if (!r->start_found || r->job->indepth_scan)
{
UpdateState( r, start );
}
if (r->job->indepth_scan && r->job->pts_to_stop &&
start >= r->pts_to_start + r->job->pts_to_stop)
{
// sync normally would terminate p-to-p
// but sync doesn't run during indepth scan
hb_log("reader: reached pts %"PRId64", exiting early", start);
reader_send_eof(r);
hb_buffer_list_close(&list);
return HB_WORK_DONE;
}
if (!r->start_found && start >= r->pts_to_start)
{
// pts_to_start point found
// Note that this code path only gets executed for
// medai where we have not performed an initial seek
// to get close to the start time. So the 'start' time
// is the time since the first frame.
if (r->stream)
{
// libav multi-threaded decoders can get into
// a bad state if the initial data is not
// decodable. So try to improve the chances of
// a good start by waiting for an initial iframe
hb_stream_set_need_keyframe(r->stream, 1);
hb_buffer_close( &buf );
continue;
}
r->start_found = 1;
// sync.c also pays attention to job->pts_to_start
// It eats up the 10 second slack that we build in
// to the start time here in reader (so that video
// decode is clean at the start time).
// sync.c expects pts_to_start to be relative to the
// first timestamp it sees.
if (r->job->pts_to_start > start)
{
r->job->pts_to_start -= start;
}
else
{
r->job->pts_to_start = 0;
}
}
// This log is handy when you need to debug timing problems
//hb_log("id %x scr_offset %"PRId64
// " start %"PRId64" --> %"PRId64"",
// buf->s.id, r->scr_offset, buf->s.start,
// buf->s.start - r->scr_offset);
buf->s.start -= r->scr_offset;
if ( buf->s.stop != AV_NOPTS_VALUE )
{
buf->s.stop -= r->scr_offset;
}
}
if ( buf->s.renderOffset != AV_NOPTS_VALUE )
{
// This packet is referenced to the same SCR as the last.
// Adjust timestamp to remove the System Clock Reference
// offset then update the average inter-packet time
// for this stream.
buf->s.renderOffset -= r->scr_offset;
update_ipt( r, buf );
}
#if 0
// JAS: This was added to fix a rare "audio time went backward"
// sync error I found in one sample. But it has a bad side
// effect on DVDs, causing frequent "adding silence" sync
// errors. So I am disabling it.
else
{
update_ipt( r, buf );
}
#endif
}
buf = splice_discontinuity(r, buf);
if( fifos && buf != NULL )
{
if ( !r->start_found )
{
hb_buffer_close( &buf );
continue;
}
buf->sequence = r->sequence++;
/* if there are mutiple output fifos, send a copy of the
* buffer down all but the first (we have to not ship the
* original buffer or we'll race with the thread that's
* consuming the buffer & inject garbage into the data stream). */
for (ii = 1; fifos[ii] != NULL; ii++)
{
hb_buffer_t *buf_copy = hb_buffer_init(buf->size);
buf_copy->s = buf->s;
memcpy(buf_copy->data, buf->data, buf->size);
push_buf(r, fifos[ii], buf_copy);
}
push_buf(r, fifos[0], buf);
buf = NULL;
}
else
{
hb_buffer_close(&buf);
}
}
hb_buffer_list_close(&list);
return HB_WORK_OK;
}