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reorder pts of packets from tracks using V_MPEG* codecs

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Originally committed as revision 8334 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-03-11 23:40:57 +00:00
parent 3d20538d07
commit ac9073c926
1 changed files with 60 additions and 0 deletions
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60
libavformat/matroska.c
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@ -178,6 +178,7 @@ typedef enum {
MATROSKA_TRACK_DEFAULT = (1<<1),
MATROSKA_TRACK_LACING = (1<<2),
MATROSKA_TRACK_REAL_V = (1<<4),
MATROSKA_TRACK_REORDER = (1<<8),
MATROSKA_TRACK_SHIFT = (1<<16)
} MatroskaTrackFlags;
@ -336,6 +337,10 @@ typedef struct MatroskaDemuxContext {
/* The packet queue. */
AVPacket **packets;
int num_packets;
/* Second packet queue used to reorder pts of some video track. */
AVPacket **packets_reorder;
int num_packets_reorder;
uint64_t reorder_max_pts;
/* have we already parse metadata/cues/clusters? */
int metadata_parsed,
@ -1020,6 +1025,43 @@ matroska_queue_packet (MatroskaDemuxContext *matroska,
matroska->num_packets++;
}
/*
* Put a packet into our internal reordering queue. Will be moved to the
* main packet queue when enough packets are available to reorder pts.
*/
static void
matroska_queue_packet_reordered (MatroskaDemuxContext *matroska,
AVPacket *pkt,
int is_bframe)
{
if (matroska->num_packets_reorder && !is_bframe
&& pkt->pts > matroska->reorder_max_pts) {
/* reorder pts */
int i, j, k = 1;
for (j=matroska->num_packets_reorder-1; j && k; j--) {
k = 0;
for (i=0; i<j; i++) {
if (matroska->packets_reorder[i]->pts > matroska->packets_reorder[i+1]->pts) {
FFSWAP(uint64_t, matroska->packets_reorder[i]->pts, matroska->packets_reorder[i+1]->pts);
k = 1;
}
}
}
/* then really queue the packets */
for (i=0; i<matroska->num_packets_reorder; i++)
matroska_queue_packet (matroska, matroska->packets_reorder[i]);
matroska->num_packets_reorder = 0;
}
matroska->packets_reorder =
av_realloc(matroska->packets_reorder,
(matroska->num_packets_reorder + 1) * sizeof(AVPacket *));
matroska->packets_reorder[matroska->num_packets_reorder++] = pkt;
if (pkt->pts > matroska->reorder_max_pts)
matroska->reorder_max_pts = pkt->pts;
}
/*
* Autodetecting...
*/
@ -2245,6 +2287,14 @@ matroska_read_header (AVFormatContext *s,
}
else if (codec_id == CODEC_ID_MPEG1VIDEO ||
codec_id == CODEC_ID_MPEG2VIDEO ||
codec_id == CODEC_ID_MPEG4 ||
codec_id == CODEC_ID_MSMPEG4V3 ||
codec_id == CODEC_ID_H264) {
track->flags |= MATROSKA_TRACK_REORDER;
}
else if (codec_id == CODEC_ID_AAC && !track->codec_priv_size) {
MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track;
int profile = matroska_aac_profile(track->codec_id);
@ -2541,6 +2591,9 @@ matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size,
pkt->pts = timecode;
pkt->pos = pos;
if (matroska->tracks[track]->flags & MATROSKA_TRACK_REORDER)
matroska_queue_packet_reordered(matroska, pkt, is_bframe);
else
matroska_queue_packet(matroska, pkt);
}
data += lace_size[n];
@ -2775,6 +2828,13 @@ matroska_read_close (AVFormatContext *s)
}
av_free(matroska->packets);
}
if (matroska->packets_reorder) {
for (n = 0; n < matroska->num_packets_reorder; n++) {
av_free_packet(matroska->packets_reorder[n]);
av_free(matroska->packets_reorder[n]);
}
av_free(matroska->packets_reorder);
}
for (n = 0; n < matroska->num_tracks; n++) {
MatroskaTrack *track = matroska->tracks[n];