* 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 <string.h>
+#include "libavutil/avassert.h"
+#include "libavutil/common.h"
+#include "libavutil/internal.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/mem.h"
+#include "avcodec.h"
+#if FF_API_DESTRUCT_PACKET
-void av_destruct_packet_nofree(AVPacket *pkt)
+void av_destruct_packet(AVPacket *pkt)
{
- pkt->data = NULL; pkt->size = 0;
+ av_free(pkt->data);
+ pkt->data = NULL;
+ pkt->size = 0;
}
-void av_destruct_packet(AVPacket *pkt)
+/* a dummy destruct callback for the callers that assume AVPacket.destruct ==
+ * NULL => static data */
+static void dummy_destruct_packet(AVPacket *pkt)
{
- av_free(pkt->data);
- pkt->data = NULL; pkt->size = 0;
+ av_assert0(0);
}
+#endif
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;
+#if FF_API_DESTRUCT_PACKET
+FF_DISABLE_DEPRECATION_WARNINGS
+ pkt->destruct = NULL;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ pkt->buf = NULL;
+ pkt->side_data = NULL;
+ pkt->side_data_elems = 0;
+}
+
+static int packet_alloc(AVBufferRef **buf, int size)
+{
+ int ret;
+ if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
+ return AVERROR(EINVAL);
+
+ ret = av_buffer_realloc(buf, size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (ret < 0)
+ return ret;
+
+ memset((*buf)->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ return 0;
}
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);
+ AVBufferRef *buf = NULL;
+ int ret = packet_alloc(&buf, size);
+ if (ret < 0)
+ return ret;
av_init_packet(pkt);
- pkt->data = data;
- pkt->size = size;
- pkt->destruct = av_destruct_packet;
+ pkt->buf = buf;
+ pkt->data = buf->data;
+ pkt->size = size;
+#if FF_API_DESTRUCT_PACKET
+FF_DISABLE_DEPRECATION_WARNINGS
+ pkt->destruct = dummy_destruct_packet;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
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);
}
-int av_dup_packet(AVPacket *pkt)
+int av_grow_packet(AVPacket *pkt, int grow_by)
{
- 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)
+ int new_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))
+ return -1;
+
+ new_size = pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE;
+ if (pkt->buf) {
+ int ret = av_buffer_realloc(&pkt->buf, new_size);
+ if (ret < 0)
+ return ret;
+ } else {
+ pkt->buf = av_buffer_alloc(new_size);
+ if (!pkt->buf)
return AVERROR(ENOMEM);
- data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!data) {
+ memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by));
+#if FF_API_DESTRUCT_PACKET
+FF_DISABLE_DEPRECATION_WARNINGS
+ pkt->destruct = dummy_destruct_packet;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ }
+ pkt->data = pkt->buf->data;
+ pkt->size += grow_by;
+ memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ return 0;
+}
+
+int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
+{
+ if (size >= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
+ return AVERROR(EINVAL);
+
+ pkt->buf = av_buffer_create(data, size + FF_INPUT_BUFFER_PADDING_SIZE,
+ av_buffer_default_free, NULL, 0);
+ if (!pkt->buf)
+ return AVERROR(ENOMEM);
+
+ pkt->data = data;
+ pkt->size = size;
+#if FF_API_DESTRUCT_PACKET
+FF_DISABLE_DEPRECATION_WARNINGS
+ pkt->destruct = dummy_destruct_packet;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ return 0;
+}
+
+#define ALLOC_MALLOC(data, size) data = av_malloc(size)
+#define ALLOC_BUF(data, size) \
+do { \
+ av_buffer_realloc(&pkt->buf, size); \
+ data = pkt->buf ? pkt->buf->data : NULL; \
+} while (0)
+
+#define DUP_DATA(dst, src, size, padding, ALLOC) \
+ do { \
+ void *data; \
+ if (padding) { \
+ if ((unsigned)(size) > \
+ (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \
+ goto failed_alloc; \
+ ALLOC(data, size + FF_INPUT_BUFFER_PADDING_SIZE); \
+ } else { \
+ ALLOC(data, 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)
+{
+ AVPacket tmp_pkt;
+
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (!pkt->buf && pkt->data
+#if FF_API_DESTRUCT_PACKET
+ && !pkt->destruct
+#endif
+ ) {
+FF_ENABLE_DEPRECATION_WARNINGS
+ tmp_pkt = *pkt;
+
+ pkt->data = NULL;
+ pkt->side_data = NULL;
+ DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1, ALLOC_BUF);
+#if FF_API_DESTRUCT_PACKET
+FF_DISABLE_DEPRECATION_WARNINGS
+ pkt->destruct = dummy_destruct_packet;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ 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, ALLOC_MALLOC);
+ 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,
+ tmp_pkt.side_data[i].size, 1, ALLOC_MALLOC);
+ pkt->side_data[i].size = tmp_pkt.side_data[i].size;
+ pkt->side_data[i].type = tmp_pkt.side_data[i].type;
+ }
+ }
+ }
+ return 0;
+
+failed_alloc:
+ av_free_packet(pkt);
+ return AVERROR(ENOMEM);
+}
+
+void av_packet_free_side_data(AVPacket *pkt)
+{
+ int i;
+ 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_free_packet(AVPacket *pkt)
+{
+ if (pkt) {
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (pkt->buf)
+ av_buffer_unref(&pkt->buf);
+#if FF_API_DESTRUCT_PACKET
+ else if (pkt->destruct)
+ pkt->destruct(pkt);
+ pkt->destruct = NULL;
+#endif
+FF_ENABLE_DEPRECATION_WARNINGS
+ pkt->data = NULL;
+ pkt->size = 0;
+
+ av_packet_free_side_data(pkt);
+ }
+}
+
+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);
+}
+
+int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
+{
+ int i;
+
+ dst->pts = src->pts;
+ dst->dts = src->dts;
+ dst->pos = src->pos;
+ dst->duration = src->duration;
+ dst->convergence_duration = src->convergence_duration;
+ dst->flags = src->flags;
+ dst->stream_index = src->stream_index;
+
+ for (i = 0; i < src->side_data_elems; i++) {
+ enum AVPacketSideDataType type = src->side_data[i].type;
+ int size = src->side_data[i].size;
+ uint8_t *src_data = src->side_data[i].data;
+ uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
+
+ if (!dst_data) {
+ av_packet_free_side_data(dst);
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;
+ memcpy(dst_data, src_data, size);
}
+
+ return 0;
+}
+
+void av_packet_unref(AVPacket *pkt)
+{
+ av_packet_free_side_data(pkt);
+ av_buffer_unref(&pkt->buf);
+ av_init_packet(pkt);
+ pkt->data = NULL;
+ pkt->size = 0;
+}
+
+int av_packet_ref(AVPacket *dst, AVPacket *src)
+{
+ int ret;
+
+ ret = av_packet_copy_props(dst, src);
+ if (ret < 0)
+ return ret;
+
+ if (!src->buf) {
+ ret = packet_alloc(&dst->buf, src->size);
+ if (ret < 0)
+ goto fail;
+ memcpy(dst->buf->data, src->data, src->size);
+ } else
+ dst->buf = av_buffer_ref(src->buf);
+
+ dst->size = src->size;
+ dst->data = dst->buf->data;
return 0;
+fail:
+ av_packet_free_side_data(dst);
+ return ret;
+}
+
+void av_packet_move_ref(AVPacket *dst, AVPacket *src)
+{
+ *dst = *src;
+ av_init_packet(src);
+}
+
+void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
+{
+ if (pkt->pts != AV_NOPTS_VALUE)
+ pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
+ if (pkt->dts != AV_NOPTS_VALUE)
+ pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
+ if (pkt->duration > 0)
+ pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
+ if (pkt->convergence_duration > 0)
+ pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
}
projects / ffmpeg / blobdiff