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Do not reallocate AVPacket's data when muxing a packet 

Originally committed as revision 16616 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Luca Abeni 2009-01-15 14:03:07 +00:00
parent 2ea512a6c2
commit 0a63a676ec
5 changed files with 36 additions and 34 deletions
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21
libavformat/avc.c
View File

@ -60,15 +60,11 @@ const uint8_t *ff_avc_find_startcode(const uint8_t *p, const uint8_t *end)
return end + 3;
}
int ff_avc_parse_nal_units(const uint8_t *buf_in, uint8_t **buf, int *size)
void ff_avc_parse_nal_units(ByteIOContext *pb, const uint8_t *buf_in, int size)
{
ByteIOContext *pb;
const uint8_t *p = buf_in;
const uint8_t *end = p + *size;
const uint8_t *end = p + size;
const uint8_t *nal_start, *nal_end;
int ret = url_open_dyn_buf(&pb);
if(ret < 0)
return ret;
nal_start = ff_avc_find_startcode(p, end);
while (nal_start < end) {
@ -78,6 +74,17 @@ int ff_avc_parse_nal_units(const uint8_t *buf_in, uint8_t **buf, int *size)
put_buffer(pb, nal_start, nal_end - nal_start);
nal_start = nal_end;
}
}
static int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
{
ByteIOContext *pb;
int ret = url_open_dyn_buf(&pb);
if(ret < 0)
return ret;
ff_avc_parse_nal_units(pb, buf_in, *size);
av_freep(buf);
*size = url_close_dyn_buf(pb, buf);
return 0;
@ -92,7 +99,7 @@ int ff_isom_write_avcc(ByteIOContext *pb, const uint8_t *data, int len)
uint32_t sps_size=0, pps_size=0;
uint8_t *sps=0, *pps=0;
int ret = ff_avc_parse_nal_units(data, &buf, &len);
int ret = ff_avc_parse_nal_units_buf(data, &buf, &len);
if (ret < 0)
return ret;
start = buf;

2
libavformat/avc.h
View File

@ -25,7 +25,7 @@
#include <stdint.h>
#include "avio.h"
int ff_avc_parse_nal_units(const uint8_t *buf_in, uint8_t **buf, int *size);
void ff_avc_parse_nal_units(ByteIOContext *s, const uint8_t *buf, int size);
int ff_isom_write_avcc(ByteIOContext *pb, const uint8_t *data, int len);
const uint8_t *ff_avc_find_startcode(const uint8_t *p, const uint8_t *end);

13
libavformat/flvenc.c
View File

@ -341,13 +341,6 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
}
if (enc->codec_id == CODEC_ID_H264) {
/* check if extradata looks like mp4 formated */
if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) {
if (ff_avc_parse_nal_units(pkt->data, &pkt->data, &pkt->size) < 0)
return -1;
assert(pkt->size);
size = pkt->size;
}
if (!flv->delay && pkt->dts < 0)
flv->delay = -pkt->dts;
}
@ -368,7 +361,13 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
put_byte(pb,1); // AVC NALU
put_be24(pb,pkt->pts - pkt->dts);
}
if (enc->codec_id == CODEC_ID_H264 &&
/* check if extradata looks like mp4 formated */
enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) {
ff_avc_parse_nal_units(pb, pkt->data, pkt->size);
} else {
put_buffer(pb, pkt->data, size);
}
put_be32(pb,size+flags_size+11); // previous tag size
flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration);

18
libavformat/matroskaenc.c
View File

@ -785,6 +785,7 @@ static void mkv_write_block(AVFormatContext *s, unsigned int blockid, AVPacket *
{
MatroskaMuxContext *mkv = s->priv_data;
ByteIOContext *pb = s->pb;
AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
"pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
@ -794,7 +795,14 @@ static void mkv_write_block(AVFormatContext *s, unsigned int blockid, AVPacket *
put_byte(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
put_be16(pb, pkt->pts - mkv->cluster_pts);
put_byte(pb, flags);
if (codec->codec_id == CODEC_ID_H264 &&
codec->extradata_size > 0 && AV_RB32(codec->extradata) == 0x00000001) {
/* from x264 or from bytestream h264 */
/* nal reformating needed */
ff_avc_parse_nal_units(pb, pkt->data, pkt->size);
} else {
put_buffer(pb, pkt->data, pkt->size);
}
}
static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
@ -822,16 +830,6 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
av_md5_update(mkv->md5_ctx, pkt->data, FFMIN(200, pkt->size));
}
if (codec->codec_id == CODEC_ID_H264 &&
codec->extradata_size > 0 && AV_RB32(codec->extradata) == 0x00000001) {
/* from x264 or from bytestream h264 */
/* nal reformating needed */
int ret = ff_avc_parse_nal_units(pkt->data, &pkt->data, &pkt->size);
if (ret < 0)
return ret;
assert(pkt->size);
}
if (codec->codec_type != CODEC_TYPE_SUBTITLE) {
mkv_write_block(s, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
} else if (codec->codec_id == CODEC_ID_SSA) {

16
libavformat/movenc.c
View File

@ -1732,15 +1732,7 @@ static int mov_write_packet(AVFormatContext *s, AVPacket *pkt)
memcpy(trk->vosData, enc->extradata, trk->vosLen);
}
if (enc->codec_id == CODEC_ID_H264 && trk->vosLen > 0 && *(uint8_t *)trk->vosData != 1) {
/* from x264 or from bytestream h264 */
/* nal reformating needed */
int ret = ff_avc_parse_nal_units(pkt->data, &pkt->data, &pkt->size);
if (ret < 0)
return ret;
assert(pkt->size);
size = pkt->size;
} else if ((enc->codec_id == CODEC_ID_DNXHD ||
if ((enc->codec_id == CODEC_ID_DNXHD ||
enc->codec_id == CODEC_ID_AC3) && !trk->vosLen) {
/* copy frame to create needed atoms */
trk->vosLen = size;
@ -1777,7 +1769,13 @@ static int mov_write_packet(AVFormatContext *s, AVPacket *pkt)
trk->sampleCount += samplesInChunk;
mov->mdat_size += size;
if (enc->codec_id == CODEC_ID_H264 && trk->vosLen > 0 && *(uint8_t *)trk->vosData != 1) {
/* from x264 or from bytestream h264 */
/* nal reformating needed */
ff_avc_parse_nal_units(pb, pkt->data, pkt->size);
} else {
put_buffer(pb, pkt->data, size);
}
put_flush_packet(pb);
return 0;