* AVPacket functions for libavcodec
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avcodec.h"
#include "libavutil/avassert.h"
-
+#include "avcodec.h"
void av_destruct_packet_nofree(AVPacket *pkt)
{
- pkt->data = NULL; pkt->size = 0;
+ pkt->data = NULL;
+ pkt->size = 0;
+ pkt->side_data = NULL;
+ pkt->side_data_elems = 0;
}
void av_destruct_packet(AVPacket *pkt)
{
+ int i;
+
av_free(pkt->data);
- pkt->data = NULL; pkt->size = 0;
+ pkt->data = NULL;
+ pkt->size = 0;
+
+ for (i = 0; i < pkt->side_data_elems; i++)
+ av_free(pkt->side_data[i].data);
+ av_freep(&pkt->side_data);
+ pkt->side_data_elems = 0;
}
void av_init_packet(AVPacket *pkt)
{
- pkt->pts = AV_NOPTS_VALUE;
- pkt->dts = AV_NOPTS_VALUE;
- pkt->pos = -1;
- pkt->duration = 0;
+ 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;
+ pkt->flags = 0;
+ pkt->stream_index = 0;
+ pkt->destruct = NULL;
+ pkt->side_data = NULL;
+ pkt->side_data_elems = 0;
}
int av_new_packet(AVPacket *pkt, int size)
{
- uint8_t *data= NULL;
- if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
+ uint8_t *data = NULL;
+ if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (data){
+ if (data) {
memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
- }else
- size=0;
+ } else
+ size = 0;
av_init_packet(pkt);
- pkt->data = data;
- pkt->size = size;
+ pkt->data = data;
+ pkt->size = size;
pkt->destruct = av_destruct_packet;
- if(!data)
+ if (!data)
return AVERROR(ENOMEM);
return 0;
}
void av_shrink_packet(AVPacket *pkt, int size)
{
- if (pkt->size <= size) return;
+ if (pkt->size <= size)
+ return;
pkt->size = size;
memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
}
av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE);
if (!pkt->size)
return av_new_packet(pkt, grow_by);
- if ((unsigned)grow_by > INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE))
+ if ((unsigned)grow_by >
+ INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE))
return -1;
- new_ptr = av_realloc(pkt->data, pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE);
+ new_ptr = av_realloc(pkt->data,
+ pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE);
if (!new_ptr)
return AVERROR(ENOMEM);
- pkt->data = new_ptr;
+ pkt->data = new_ptr;
pkt->size += grow_by;
memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return 0;
}
+#define DUP_DATA(dst, src, size, padding) \
+ do { \
+ void *data; \
+ if (padding) { \
+ if ((unsigned)(size) > \
+ (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \
+ goto failed_alloc; \
+ data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); \
+ } else { \
+ data = av_malloc(size); \
+ } \
+ if (!data) \
+ goto failed_alloc; \
+ memcpy(data, src, size); \
+ if (padding) \
+ memset((uint8_t *)data + size, 0, \
+ FF_INPUT_BUFFER_PADDING_SIZE); \
+ dst = data; \
+ } while (0)
+
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;
+ AVPacket tmp_pkt;
+
+ if (((pkt->destruct == av_destruct_packet_nofree) ||
+ (pkt->destruct == NULL)) && pkt->data) {
+ tmp_pkt = *pkt;
+
+ pkt->data = NULL;
+ pkt->side_data = NULL;
+ DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1);
pkt->destruct = av_destruct_packet;
+
+ if (pkt->side_data_elems) {
+ int i;
+
+ DUP_DATA(pkt->side_data, tmp_pkt.side_data,
+ pkt->side_data_elems * sizeof(*pkt->side_data), 0);
+ memset(pkt->side_data, 0,
+ pkt->side_data_elems * sizeof(*pkt->side_data));
+ for (i = 0; i < pkt->side_data_elems; i++)
+ DUP_DATA(pkt->side_data[i].data, tmp_pkt.side_data[i].data,
+ pkt->side_data[i].size, 1);
+ }
}
return 0;
+
+failed_alloc:
+ av_destruct_packet(pkt);
+ return AVERROR(ENOMEM);
}
void av_free_packet(AVPacket *pkt)
{
if (pkt) {
- if (pkt->destruct) pkt->destruct(pkt);
- pkt->data = NULL; pkt->size = 0;
+ if (pkt->destruct)
+ pkt->destruct(pkt);
+ pkt->data = NULL;
+ pkt->size = 0;
+ pkt->side_data = NULL;
+ pkt->side_data_elems = 0;
+ }
+}
+
+uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+ int size)
+{
+ int elems = pkt->side_data_elems;
+
+ if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data))
+ return NULL;
+ if ((unsigned)size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
+ return NULL;
+
+ pkt->side_data = av_realloc(pkt->side_data,
+ (elems + 1) * sizeof(*pkt->side_data));
+ if (!pkt->side_data)
+ return NULL;
+
+ pkt->side_data[elems].data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!pkt->side_data[elems].data)
+ return NULL;
+ pkt->side_data[elems].size = size;
+ pkt->side_data[elems].type = type;
+ pkt->side_data_elems++;
+
+ return pkt->side_data[elems].data;
+}
+
+uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+ int *size)
+{
+ int i;
+
+ for (i = 0; i < pkt->side_data_elems; i++) {
+ if (pkt->side_data[i].type == type) {
+ if (size)
+ *size = pkt->side_data[i].size;
+ return pkt->side_data[i].data;
+ }
+ }
+ return NULL;
+}
+
+int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+ int size)
+{
+ int i;
+
+ for (i = 0; i < pkt->side_data_elems; i++) {
+ if (pkt->side_data[i].type == type) {
+ if (size > pkt->side_data[i].size)
+ return AVERROR(ENOMEM);
+ pkt->side_data[i].size = size;
+ return 0;
+ }
}
+ return AVERROR(ENOENT);
}
projects / ffmpeg / blobdiff