mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
80d403fc19
It is still used in comparisons to keep ABI compatibility. Originally committed as revision 18431 to svn://svn.ffmpeg.org/ffmpeg/trunk
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
|
|
* AVPacket functions for libavcodec
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
|
|
|
|
void av_destruct_packet_nofree(AVPacket *pkt)
|
|
{
|
|
pkt->data = NULL; pkt->size = 0;
|
|
}
|
|
|
|
void av_destruct_packet(AVPacket *pkt)
|
|
{
|
|
av_free(pkt->data);
|
|
pkt->data = NULL; pkt->size = 0;
|
|
}
|
|
|
|
void av_init_packet(AVPacket *pkt)
|
|
{
|
|
pkt->pts = AV_NOPTS_VALUE;
|
|
pkt->dts = AV_NOPTS_VALUE;
|
|
pkt->pos = -1;
|
|
pkt->duration = 0;
|
|
pkt->convergence_duration = 0;
|
|
pkt->flags = 0;
|
|
pkt->stream_index = 0;
|
|
pkt->destruct= NULL;
|
|
}
|
|
|
|
int av_new_packet(AVPacket *pkt, int size)
|
|
{
|
|
uint8_t *data;
|
|
if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
|
|
return AVERROR(ENOMEM);
|
|
data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
av_init_packet(pkt);
|
|
pkt->data = data;
|
|
pkt->size = size;
|
|
pkt->destruct = av_destruct_packet;
|
|
return 0;
|
|
}
|
|
|
|
void av_shrink_packet(AVPacket *pkt, int size)
|
|
{
|
|
if (pkt->size <= size) return;
|
|
pkt->size = size;
|
|
memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
}
|
|
|
|
int av_dup_packet(AVPacket *pkt)
|
|
{
|
|
if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) {
|
|
uint8_t *data;
|
|
/* We duplicate the packet and don't forget to add the padding again. */
|
|
if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
|
|
return AVERROR(ENOMEM);
|
|
data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!data) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(data, pkt->data, pkt->size);
|
|
memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
pkt->data = data;
|
|
pkt->destruct = av_destruct_packet;
|
|
}
|
|
return 0;
|
|
}
|