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Code Issues Releases Activity

pass dts and pts through ffm, should fix streaming b frames

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Originally committed as revision 13725 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier
2008-06-09 07:43:14 +00:00
parent 8983aa337c
commit 3c6a9f66b9
5 changed files with 29 additions and 20 deletions
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libavformat/ffm.h
+3 -3
View File
@@ -29,8 +29,9 @@
#define PACKET_ID 0x666d
/* each packet contains frames (which can span several packets */
#define FRAME_HEADER_SIZE 8
#define FRAME_HEADER_SIZE 16
#define FLAG_KEY_FRAME 0x01
#define FLAG_DTS 0x02
enum {
READ_HEADER,
@@ -41,11 +42,10 @@ typedef struct FFMContext {
/* only reading mode */
offset_t write_index, file_size;
int read_state;
uint8_t header[FRAME_HEADER_SIZE];
uint8_t header[FRAME_HEADER_SIZE+4];
/* read and write */
int first_packet; /* true if first packet, needed to set the discontinuity tag */
int first_frame_in_packet; /* true if first frame in packet, needed to know if PTS information is valid */
int packet_size;
int frame_offset;
int64_t pts;
libavformat/ffmdec.c
+9 -7
View File
@@ -100,7 +100,6 @@ static int ffm_read_data(AVFormatContext *s,
get_be16(pb); /* PACKET_ID */
fill_size = get_be16(pb);
ffm->pts = get_be64(pb);
ffm->first_frame_in_packet = 1;
frame_offset = get_be16(pb);
get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
@@ -361,7 +360,7 @@ static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
switch(ffm->read_state) {
case READ_HEADER:
if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) {
return AVERROR(EAGAIN);
}
dprintf(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
@@ -369,6 +368,9 @@ static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
FRAME_HEADER_SIZE)
return AVERROR(EAGAIN);
if (ffm->header[1] & FLAG_DTS)
if (ffm_read_data(s, ffm->header+16, 4, 1) != 4)
return AVERROR(EAGAIN);
#if 0
av_hexdump_log(s, AV_LOG_DEBUG, ffm->header, FRAME_HEADER_SIZE);
#endif
@@ -400,11 +402,11 @@ static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
av_free_packet(pkt);
return AVERROR(EAGAIN);
}
if (ffm->first_frame_in_packet)
{
pkt->pts = ffm->pts;
ffm->first_frame_in_packet = 0;
}
pkt->pts = AV_RB64(ffm->header+8);
if (ffm->header[1] & FLAG_DTS)
pkt->dts = pkt->pts - AV_RB32(ffm->header+16);
else
pkt->dts = pkt->pts;
pkt->duration = duration;
break;
}
libavformat/ffmenc.c
+8 -1
View File
@@ -197,6 +197,7 @@ static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
AVStream *st = s->streams[pkt->stream_index];
int64_t pts;
uint8_t header[FRAME_HEADER_SIZE];
int header_size = FRAME_HEADER_SIZE;
pts = s->timestamp + pkt->pts;
/* packet size & key_frame */
@@ -206,7 +207,13 @@ static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
header[1] |= FLAG_KEY_FRAME;
AV_WB24(header+2, pkt->size);
AV_WB24(header+5, pkt->duration);
ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1);
AV_WB64(header+8, pts);
if (pkt->pts != pkt->dts) {
header[1] |= FLAG_DTS;
AV_WB32(header+16, pkt->pts - pkt->dts);
header_size += 4;
}
ffm_write_data(s, header, header_size, pts, 1);
ffm_write_data(s, pkt->data, pkt->size, pts, 0);
return 0;