diff options
Diffstat (limited to 'ffmpeg/libavcodec/avpacket.c')
| -rw-r--r-- | ffmpeg/libavcodec/avpacket.c | 565 |
1 files changed, 0 insertions, 565 deletions
diff --git a/ffmpeg/libavcodec/avpacket.c b/ffmpeg/libavcodec/avpacket.c deleted file mode 100644 index f966bfe..0000000 --- a/ffmpeg/libavcodec/avpacket.c +++ /dev/null @@ -1,565 +0,0 @@ -/* - * 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 <string.h> - -#include "libavutil/avassert.h" -#include "libavutil/common.h" -#include "libavutil/internal.h" -#include "libavutil/mem.h" -#include "avcodec.h" -#include "bytestream.h" -#include "internal.h" - -#if FF_API_DESTRUCT_PACKET - -void av_destruct_packet(AVPacket *pkt) -{ - av_free(pkt->data); - pkt->data = NULL; - pkt->size = 0; -} - -/* a dummy destruct callback for the callers that assume AVPacket.destruct == - * NULL => static data */ -static void dummy_destruct_packet(AVPacket *pkt) -{ - 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->convergence_duration = 0; - 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) -{ - AVBufferRef *buf = NULL; - int ret = packet_alloc(&buf, size); - if (ret < 0) - return ret; - - av_init_packet(pkt); - 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; - pkt->size = size; - memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); -} - -int av_grow_packet(AVPacket *pkt, int grow_by) -{ - 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); - 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) - -/* Makes duplicates of data, side_data, but does not copy any other fields */ -static int copy_packet_data(AVPacket *pkt, AVPacket *src, int dup) -{ - pkt->data = NULL; - pkt->side_data = NULL; - if (pkt->buf) { - AVBufferRef *ref = av_buffer_ref(src->buf); - if (!ref) - return AVERROR(ENOMEM); - pkt->buf = ref; - pkt->data = ref->data; - } else { - DUP_DATA(pkt->data, src->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 && dup) - pkt->side_data = src->side_data; - if (pkt->side_data_elems && !dup) { - return av_copy_packet_side_data(pkt, src); - } - return 0; - -failed_alloc: - av_free_packet(pkt); - return AVERROR(ENOMEM); -} - -int av_copy_packet_side_data(AVPacket *pkt, AVPacket *src) -{ - if (src->side_data_elems) { - int i; - DUP_DATA(pkt->side_data, src->side_data, - src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC); - if (src != pkt) { - memset(pkt->side_data, 0, - src->side_data_elems * sizeof(*src->side_data)); - } - for (i = 0; i < src->side_data_elems; i++) { - DUP_DATA(pkt->side_data[i].data, src->side_data[i].data, - src->side_data[i].size, 1, ALLOC_MALLOC); - pkt->side_data[i].size = src->side_data[i].size; - pkt->side_data[i].type = src->side_data[i].type; - } - } - pkt->side_data_elems = src->side_data_elems; - return 0; - -failed_alloc: - av_free_packet(pkt); - return AVERROR(ENOMEM); -} - -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; - return copy_packet_data(pkt, &tmp_pkt, 1); - } - return 0; -} - -int av_copy_packet(AVPacket *dst, AVPacket *src) -{ - *dst = *src; - return copy_packet_data(dst, src, 0); -} - -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_mallocz(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; -} - -#define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL - -int av_packet_merge_side_data(AVPacket *pkt){ - if(pkt->side_data_elems){ - AVBufferRef *buf; - 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); - buf = av_buffer_alloc(size); - if (!buf) - return AVERROR(ENOMEM); - pkt->buf = buf; - pkt->data = p = buf->data; -#if FF_API_DESTRUCT_PACKET -FF_DISABLE_DEPRECATION_WARNINGS - pkt->destruct = dummy_destruct_packet; -FF_ENABLE_DEPRECATION_WARNINGS -#endif - 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; - - p = pkt->data + pkt->size - 8 - 5; - 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_mallocz(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; -} - -uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size) -{ - AVDictionaryEntry *t = NULL; - uint8_t *data = NULL; - *size = 0; - - if (!dict) - return NULL; - - while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) { - const size_t keylen = strlen(t->key); - const size_t valuelen = strlen(t->value); - const size_t new_size = *size + keylen + 1 + valuelen + 1; - uint8_t *const new_data = av_realloc(data, new_size); - - if (!new_data) - goto fail; - data = new_data; - if (new_size > INT_MAX) - goto fail; - - memcpy(data + *size, t->key, keylen + 1); - memcpy(data + *size + keylen + 1, t->value, valuelen + 1); - - *size = new_size; - } - - return data; - -fail: - av_freep(&data); - *size = 0; - return NULL; -} - -int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict) -{ - const uint8_t *end = data + size; - int ret = 0; - - if (!dict || !data || !size) - return ret; - if (size && end[-1]) - return AVERROR_INVALIDDATA; - while (data < end) { - const uint8_t *key = data; - const uint8_t *val = data + strlen(key) + 1; - - if (val >= end) - return AVERROR_INVALIDDATA; - - ret = av_dict_set(dict, key, val, 0); - if (ret < 0) - break; - data = val + strlen(val) + 1; - } - - return ret; -} - -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; - dst->side_data_elems = src->side_data_elems; - - 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(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); -} |