diff options
Diffstat (limited to 'media/ffvpx/libavcodec/avpacket.c')
| -rw-r--r-- | media/ffvpx/libavcodec/avpacket.c | 664 |
1 files changed, 664 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/avpacket.c b/media/ffvpx/libavcodec/avpacket.c new file mode 100644 index 000000000..921868923 --- /dev/null +++ b/media/ffvpx/libavcodec/avpacket.c @@ -0,0 +1,664 @@ +/* + * 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/mathematics.h" +#include "libavutil/mem.h" +#include "avcodec.h" +#include "bytestream.h" +#include "internal.h" + +void av_init_packet(AVPacket *pkt) +{ + pkt->pts = AV_NOPTS_VALUE; + pkt->dts = AV_NOPTS_VALUE; + pkt->pos = -1; + pkt->duration = 0; +#if FF_API_CONVERGENCE_DURATION +FF_DISABLE_DEPRECATION_WARNINGS + pkt->convergence_duration = 0; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + pkt->flags = 0; + pkt->stream_index = 0; + pkt->buf = NULL; + pkt->side_data = NULL; + pkt->side_data_elems = 0; +} + +AVPacket *av_packet_alloc(void) +{ + AVPacket *pkt = av_mallocz(sizeof(AVPacket)); + if (!pkt) + return pkt; + + av_packet_unref(pkt); + + return pkt; +} + +void av_packet_free(AVPacket **pkt) +{ + if (!pkt || !*pkt) + return; + + av_packet_unref(*pkt); + av_freep(pkt); +} + +static int packet_alloc(AVBufferRef **buf, int size) +{ + int ret; + if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) + return AVERROR(EINVAL); + + ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE); + if (ret < 0) + return ret; + + memset((*buf)->data + size, 0, AV_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; + + return 0; +} + +void av_shrink_packet(AVPacket *pkt, int size) +{ + if (pkt->size <= size) + return; + pkt->size = size; + memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE); +} + +int av_grow_packet(AVPacket *pkt, int grow_by) +{ + int new_size; + av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE); + if ((unsigned)grow_by > + INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE)) + return -1; + + new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE; + if (pkt->buf) { + size_t data_offset; + uint8_t *old_data = pkt->data; + if (pkt->data == NULL) { + data_offset = 0; + pkt->data = pkt->buf->data; + } else { + data_offset = pkt->data - pkt->buf->data; + if (data_offset > INT_MAX - new_size) + return -1; + } + + if (new_size + data_offset > pkt->buf->size) { + int ret = av_buffer_realloc(&pkt->buf, new_size + data_offset); + if (ret < 0) { + pkt->data = old_data; + return ret; + } + pkt->data = pkt->buf->data + data_offset; + } + } else { + pkt->buf = av_buffer_alloc(new_size); + if (!pkt->buf) + return AVERROR(ENOMEM); + memcpy(pkt->buf->data, pkt->data, pkt->size); + pkt->data = pkt->buf->data; + } + pkt->size += grow_by; + memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE); + + return 0; +} + +int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size) +{ + if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) + return AVERROR(EINVAL); + + pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE, + av_buffer_default_free, NULL, 0); + if (!pkt->buf) + return AVERROR(ENOMEM); + + pkt->data = data; + pkt->size = size; + + return 0; +} + +#if FF_API_AVPACKET_OLD_API +FF_DISABLE_DEPRECATION_WARNINGS +#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) + AV_INPUT_BUFFER_PADDING_SIZE) \ + goto failed_alloc; \ + ALLOC(data, size + AV_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, \ + AV_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, const 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 (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_packet_unref(pkt); + return AVERROR(ENOMEM); +} + +int av_copy_packet_side_data(AVPacket *pkt, const 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_packet_unref(pkt); + return AVERROR(ENOMEM); +} +FF_ENABLE_DEPRECATION_WARNINGS +#endif + +int av_dup_packet(AVPacket *pkt) +{ + AVPacket tmp_pkt; + + if (!pkt->buf && pkt->data) { + tmp_pkt = *pkt; + return copy_packet_data(pkt, &tmp_pkt, 1); + } + return 0; +} + +int av_copy_packet(AVPacket *dst, const 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_freep(&pkt->side_data[i].data); + av_freep(&pkt->side_data); + pkt->side_data_elems = 0; +} + +#if FF_API_AVPACKET_OLD_API +FF_DISABLE_DEPRECATION_WARNINGS +void av_free_packet(AVPacket *pkt) +{ + if (pkt) { + if (pkt->buf) + av_buffer_unref(&pkt->buf); + pkt->data = NULL; + pkt->size = 0; + + av_packet_free_side_data(pkt); + } +} +FF_ENABLE_DEPRECATION_WARNINGS +#endif + +int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, + uint8_t *data, size_t size) +{ + int elems = pkt->side_data_elems; + + if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data)) + return AVERROR(ERANGE); + + pkt->side_data = av_realloc(pkt->side_data, + (elems + 1) * sizeof(*pkt->side_data)); + if (!pkt->side_data) + return AVERROR(ENOMEM); + + pkt->side_data[elems].data = data; + pkt->side_data[elems].size = size; + pkt->side_data[elems].type = type; + pkt->side_data_elems++; + + return 0; +} + + +uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, + int size) +{ + int ret; + uint8_t *data; + + if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) + return NULL; + data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE); + if (!data) + return NULL; + + ret = av_packet_add_side_data(pkt, type, data, size); + if (ret < 0) { + av_freep(&data); + return NULL; + } + + return 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; +} + +const char *av_packet_side_data_name(enum AVPacketSideDataType type) +{ + switch(type) { + case AV_PKT_DATA_PALETTE: return "Palette"; + case AV_PKT_DATA_NEW_EXTRADATA: return "New Extradata"; + case AV_PKT_DATA_PARAM_CHANGE: return "Param Change"; + case AV_PKT_DATA_H263_MB_INFO: return "H263 MB Info"; + case AV_PKT_DATA_REPLAYGAIN: return "Replay Gain"; + case AV_PKT_DATA_DISPLAYMATRIX: return "Display Matrix"; + case AV_PKT_DATA_STEREO3D: return "Stereo 3D"; + case AV_PKT_DATA_AUDIO_SERVICE_TYPE: return "Audio Service Type"; + case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples"; + case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono"; + case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata"; + case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position"; + case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional"; + case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID"; + case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings"; + case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update"; + case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID"; + case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata"; + } + 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 + AV_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; + pkt->size = size - AV_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, AV_INPUT_BUFFER_PADDING_SIZE); + av_packet_unref(&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 - 5 || p - pkt->data < size) + return 0; + if (p[4]&128) + break; + if (p - pkt->data < size + 5) + return 0; + p-= size+5; + } + + pkt->side_data = av_malloc_array(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 - 5 && p - pkt->data >= size); + pkt->side_data[i].data = av_mallocz(size + AV_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; +#if FF_API_CONVERGENCE_DURATION +FF_DISABLE_DEPRECATION_WARNINGS + dst->convergence_duration = src->convergence_duration; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + 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(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, const 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); + + dst->data = dst->buf->data; + } else { + dst->buf = av_buffer_ref(src->buf); + if (!dst->buf) { + ret = AVERROR(ENOMEM); + goto fail; + } + dst->data = src->data; + } + + dst->size = src->size; + + return 0; +fail: + av_packet_free_side_data(dst); + return ret; +} + +AVPacket *av_packet_clone(AVPacket *src) +{ + AVPacket *ret = av_packet_alloc(); + + if (!ret) + return ret; + + if (av_packet_ref(ret, src)) + av_packet_free(&ret); + + return ret; +} + +void av_packet_move_ref(AVPacket *dst, AVPacket *src) +{ + *dst = *src; + av_init_packet(src); + src->data = NULL; + src->size = 0; +} + +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 FF_API_CONVERGENCE_DURATION +FF_DISABLE_DEPRECATION_WARNINGS + if (pkt->convergence_duration > 0) + pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb); +FF_ENABLE_DEPRECATION_WARNINGS +#endif +} + +int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type) +{ + uint8_t *side_data; + int side_data_size; + int i; + + side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size); + if (!side_data) { + side_data_size = 4+4+8*error_count; + side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, + side_data_size); + } + + if (!side_data || side_data_size < 4+4+8*error_count) + return AVERROR(ENOMEM); + + AV_WL32(side_data , quality ); + side_data[4] = pict_type; + side_data[5] = error_count; + for (i = 0; i<error_count; i++) + AV_WL64(side_data+8 + 8*i , error[i]); + + return 0; +} |