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Merge/split side data.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-04-20 03:25:48 +02:00
parent 007f773942
commit 94eadee7ef
4 changed files with 89 additions and 3 deletions
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5
libavcodec/avcodec.h
View File

@ -3229,6 +3229,11 @@ uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
int *size);
int av_packet_merge_side_data(AVPacket *pkt);
int av_packet_split_side_data(AVPacket *pkt);
/* resample.c */
struct ReSampleContext;

81
libavcodec/avpacket.c
View File

@ -21,7 +21,7 @@
#include "avcodec.h"
#include "libavutil/avassert.h"
#include "bytestream.h"
void av_destruct_packet_nofree(AVPacket *pkt)
{
@ -196,3 +196,82 @@ uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
}
return NULL;
}
#define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
int av_packet_merge_side_data(AVPacket *pkt){
if(pkt->side_data_elems){
int i;
uint8_t *p;
uint64_t size= pkt->size + 8LL + FF_INPUT_BUFFER_PADDING_SIZE;
AVPacket old= *pkt;
for (i=0; i<old.side_data_elems; i++) {
size += old.side_data[i].size + 5LL;
}
if (size > INT_MAX)
return AVERROR(EINVAL);
p = av_malloc(size);
if (!p)
return AVERROR(ENOMEM);
pkt->data = p;
pkt->destruct = av_destruct_packet;
pkt->size = size - FF_INPUT_BUFFER_PADDING_SIZE;
bytestream_put_buffer(&p, old.data, old.size);
for (i=old.side_data_elems-1; i>=0; i--) {
bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
bytestream_put_be32(&p, old.side_data[i].size);
*p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
}
bytestream_put_be64(&p, FF_MERGE_MARKER);
av_assert0(p-pkt->data == pkt->size);
memset(p, 0, FF_INPUT_BUFFER_PADDING_SIZE);
av_free_packet(&old);
pkt->side_data_elems = 0;
pkt->side_data = NULL;
return 1;
}
return 0;
}
int av_packet_split_side_data(AVPacket *pkt){
if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
int i;
unsigned int size;
uint8_t *p= pkt->data + pkt->size - 8 - 5;
av_dup_packet(pkt);
for (i=1; ; i++){
size = AV_RB32(p);
if (size>INT_MAX || p - pkt->data <= size)
return 0;
if (p[4]&128)
break;
p-= size+5;
}
pkt->side_data = av_malloc(i * sizeof(*pkt->side_data));
if (!pkt->side_data)
return AVERROR(ENOMEM);
p= pkt->data + pkt->size - 8 - 5;
for (i=0; ; i++){
size= AV_RB32(p);
av_assert0(size<=INT_MAX && p - pkt->data > size);
pkt->side_data[i].data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
pkt->side_data[i].size = size;
pkt->side_data[i].type = p[4]&127;
if (!pkt->side_data[i].data)
return AVERROR(ENOMEM);
memcpy(pkt->side_data[i].data, p-size, size);
pkt->size -= size + 5;
if(p[4]&128)
break;
p-= size+5;
}
pkt->size -= 8;
pkt->side_data_elems = i+1;
return 1;
}
return 0;
}

4
libavcodec/utils.c
View File

@ -733,9 +733,9 @@ int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *pi
if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
return -1;
avctx->pkt = avpkt;
if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
av_packet_split_side_data(avpkt);
avctx->pkt = avpkt;
if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
avpkt);

2
libavformat/utils.c
View File

@ -672,6 +672,8 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt)
s->streams[i]->request_probe = -1;
continue;
}
av_packet_merge_side_data(pkt);
st= s->streams[pkt->stream_index];
switch(st->codec->codec_type){