+ w = pv->job->title->width;
+ h = pv->job->title->height;
+ }
+ hb_buffer_t *buf = hb_video_buffer_init( w, h );
+ uint8_t *dst = buf->data;
+
+ if ( context->pix_fmt != PIX_FMT_YUV420P || w != context->width ||
+ h != context->height )
+ {
+ // have to convert to our internal color space and/or rescale
+ AVPicture dstpic;
+ avpicture_fill( &dstpic, dst, PIX_FMT_YUV420P, w, h );
+
+ if ( ! pv->sws_context )
+ {
+ pv->sws_context = sws_getContext( context->width, context->height, context->pix_fmt,
+ w, h, PIX_FMT_YUV420P,
+ SWS_LANCZOS|SWS_ACCURATE_RND,
+ NULL, NULL, NULL );
+ }
+ sws_scale( pv->sws_context, frame->data, frame->linesize, 0, h,
+ dstpic.data, dstpic.linesize );
+ }
+ else
+ {
+ dst = copy_plane( dst, frame->data[0], w, frame->linesize[0], h );
+ w = (w + 1) >> 1; h = (h + 1) >> 1;
+ dst = copy_plane( dst, frame->data[1], w, frame->linesize[1], h );
+ dst = copy_plane( dst, frame->data[2], w, frame->linesize[2], h );
+ }
+ return buf;
+}
+
+static int get_frame_buf( AVCodecContext *context, AVFrame *frame )
+{
+ hb_work_private_t *pv = context->opaque;
+ frame->pts = pv->pts;
+ pv->pts = -1;
+ return avcodec_default_get_buffer( context, frame );
+}
+
+static int reget_frame_buf( AVCodecContext *context, AVFrame *frame )
+{
+ hb_work_private_t *pv = context->opaque;
+ frame->pts = pv->pts;
+ pv->pts = -1;
+ return avcodec_default_reget_buffer( context, frame );
+}
+
+static void log_chapter( hb_work_private_t *pv, int chap_num, int64_t pts )
+{
+ hb_chapter_t *c = hb_list_item( pv->job->title->list_chapter, chap_num - 1 );
+ if ( c && c->title )
+ {
+ hb_log( "%s: \"%s\" (%d) at frame %u time %"PRId64,
+ pv->context->codec->name, c->title, chap_num, pv->nframes, pts );
+ }
+ else
+ {
+ hb_log( "%s: Chapter %d at frame %u time %"PRId64,
+ pv->context->codec->name, chap_num, pv->nframes, pts );
+ }
+}
+
+static void flushDelayQueue( hb_work_private_t *pv )
+{
+ hb_buffer_t *buf;
+ int slot = pv->nframes & (HEAP_SIZE-1);
+
+ // flush all the video packets left on our timestamp-reordering delay q
+ while ( ( buf = pv->delayq[slot] ) != NULL )
+ {
+ buf->start = heap_pop( &pv->pts_heap );
+ hb_list_add( pv->list, buf );
+ pv->delayq[slot] = NULL;
+ slot = ( slot + 1 ) & (HEAP_SIZE-1);
+ }
+}
+
+/*
+ * Decodes a video frame from the specified raw packet data ('data', 'size', 'sequence').
+ * The output of this function is stored in 'pv->list', which contains a list
+ * of zero or more decoded packets.
+ *
+ * The returned packets are guaranteed to have their timestamps in the correct order,
+ * even if the original packets decoded by libavcodec have misordered timestamps,
+ * due to the use of 'packed B-frames'.
+ *
+ * Internally the set of decoded packets may be buffered in 'pv->delayq'
+ * until enough packets have been decoded so that the timestamps can be
+ * correctly rewritten, if this is necessary.
+ */
+static int decodeFrame( hb_work_private_t *pv, uint8_t *data, int size, int sequence )
+{
+ int got_picture, oldlevel = 0;
+ AVFrame frame;
+ AVPacket avp;
+
+ if ( global_verbosity_level <= 1 )
+ {
+ oldlevel = av_log_get_level();
+ av_log_set_level( AV_LOG_QUIET );
+ }
+
+ av_init_packet( &avp );
+ avp.data = data;
+ avp.size = size;
+ if ( avcodec_decode_video2( pv->context, &frame, &got_picture, &avp ) < 0 )
+ {
+ ++pv->decode_errors;
+ }
+ if ( global_verbosity_level <= 1 )
+ {
+ av_log_set_level( oldlevel );
+ }
+ if( got_picture )
+ {
+ // ffmpeg makes it hard to attach a pts to a frame. if the MPEG ES
+ // packet had a pts we handed it to av_parser_parse (if the packet had
+ // no pts we set it to -1 but before the parse we can't distinguish between
+ // the start of a video frame with no pts & an intermediate packet of
+ // some frame which never has a pts). we hope that when parse returns
+ // the frame to us the pts we originally handed it will be in parser->pts.
+ // we put this pts into pv->pts so that when a avcodec_decode_video
+ // finally gets around to allocating an AVFrame to hold the decoded
+ // frame we can stuff that pts into the frame. if all of these relays
+ // worked at this point frame.pts should hold the frame's pts from the
+ // original data stream or -1 if it didn't have one. in the latter case
+ // we generate the next pts in sequence for it.
+ double frame_dur = pv->duration;
+ if ( frame_dur <= 0 )
+ {
+ frame_dur = 90000. * (double)pv->context->time_base.num /
+ (double)pv->context->time_base.den;
+ pv->duration = frame_dur;
+ }
+ if ( frame.repeat_pict )
+ {
+ frame_dur += frame.repeat_pict * frame_dur * 0.5;
+ }
+ // XXX Unlike every other video decoder, the Raw decoder doesn't
+ // use the standard buffer allocation routines so we never
+ // get to put a PTS in the frame. Do it now.
+ if ( pv->context->codec_id == CODEC_ID_RAWVIDEO )
+ {
+ frame.pts = pv->pts;
+ pv->pts = -1;
+ }
+ // If there was no pts for this frame, assume constant frame rate
+ // video & estimate the next frame time from the last & duration.
+ double pts = frame.pts;
+ if ( pts < 0 )
+ {
+ pts = pv->pts_next;
+ }
+ pv->pts_next = pts + frame_dur;
+
+ hb_buffer_t *buf;
+
+ // if we're doing a scan or this content couldn't have been broken
+ // by Microsoft we don't worry about timestamp reordering
+ if ( ! pv->job || ! pv->brokenByMicrosoft )
+ {
+ buf = copy_frame( pv, &frame );
+ buf->start = pts;
+ buf->sequence = sequence;
+ hb_list_add( pv->list, buf );
+ ++pv->nframes;
+ return got_picture;
+ }
+
+ // XXX This following probably addresses a libavcodec bug but I don't
+ // see an easy fix so we workaround it here.
+ //
+ // The M$ 'packed B-frames' atrocity results in decoded frames with
+ // the wrong timestamp. E.g., if there are 2 b-frames the timestamps
+ // we see here will be "2 3 1 5 6 4 ..." instead of "1 2 3 4 5 6".
+ // The frames are actually delivered in the right order but with
+ // the wrong timestamp. To get the correct timestamp attached to
+ // each frame we have a delay queue (longer than the max number of
+ // b-frames) & a sorting heap for the timestamps. As each frame
+ // comes out of the decoder the oldest frame in the queue is removed
+ // and associated with the smallest timestamp. Then the new frame is
+ // added to the queue & its timestamp is pushed on the heap.
+ // This does nothing if the timestamps are correct (i.e., the video
+ // uses a codec that Micro$oft hasn't broken yet) but the frames
+ // get timestamped correctly even when M$ has munged them.
+
+ // remove the oldest picture from the frame queue (if any) &
+ // give it the smallest timestamp from our heap. The queue size
+ // is a power of two so we get the slot of the oldest by masking
+ // the frame count & this will become the slot of the newest
+ // once we've removed & processed the oldest.
+ int slot = pv->nframes & (HEAP_SIZE-1);
+ if ( ( buf = pv->delayq[slot] ) != NULL )
+ {
+ buf->start = heap_pop( &pv->pts_heap );
+
+ if ( pv->new_chap && buf->start >= pv->chap_time )
+ {
+ buf->new_chap = pv->new_chap;
+ pv->new_chap = 0;
+ pv->chap_time = 0;
+ log_chapter( pv, buf->new_chap, buf->start );
+ }
+ else if ( pv->nframes == 0 )
+ {
+ log_chapter( pv, pv->job->chapter_start, buf->start );
+ }
+ hb_list_add( pv->list, buf );
+ }
+
+ // add the new frame to the delayq & push its timestamp on the heap
+ buf = copy_frame( pv, &frame );
+ buf->sequence = sequence;
+ pv->delayq[slot] = buf;
+ heap_push( &pv->pts_heap, pts );
+
+ ++pv->nframes;
+ }
+
+ return got_picture;
+}
+
+static void decodeVideo( hb_work_private_t *pv, uint8_t *data, int size, int sequence,
+ int64_t pts, int64_t dts )
+{
+ /*
+ * The following loop is a do..while because we need to handle both
+ * data & the flush at the end (signaled by size=0). At the end there's
+ * generally a frame in the parser & one or more frames in the decoder
+ * (depending on the bframes setting).
+ */
+ int pos = 0;
+ do {
+ uint8_t *pout;
+ int pout_len;
+ int len = av_parser_parse2( pv->parser, pv->context, &pout, &pout_len,
+ data + pos, size - pos, pts, dts, AV_NOPTS_VALUE );
+ pos += len;
+
+ if ( pout_len > 0 )
+ {
+ pv->pts = pv->parser->pts;
+ decodeFrame( pv, pout, pout_len, sequence );
+ }
+ } while ( pos < size );
+
+ /* the stuff above flushed the parser, now flush the decoder */
+ if ( size <= 0 )
+ {
+ while ( decodeFrame( pv, NULL, 0, sequence ) )
+ {
+ }
+ flushDelayQueue( pv );
+ }
+}
+
+/*
+ * Removes all packets from 'pv->list', links them together into
+ * a linked-list, and returns the first packet in the list.
+ */
+static hb_buffer_t *link_buf_list( hb_work_private_t *pv )
+{
+ hb_buffer_t *head = hb_list_item( pv->list, 0 );
+
+ if ( head )
+ {
+ hb_list_rem( pv->list, head );
+
+ hb_buffer_t *last = head, *buf;
+
+ while ( ( buf = hb_list_item( pv->list, 0 ) ) != NULL )
+ {
+ hb_list_rem( pv->list, buf );
+ last->next = buf;
+ last = buf;
+ }