| /* |
| * AVCodecParameters functions for libavcodec |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * AVCodecParameters functions for libavcodec. |
| */ |
| |
| #include <string.h> |
| #include "libavutil/mem.h" |
| #include "avcodec.h" |
| #include "codec_par.h" |
| #include "packet.h" |
| |
| static void codec_parameters_reset(AVCodecParameters *par) |
| { |
| av_freep(&par->extradata); |
| av_channel_layout_uninit(&par->ch_layout); |
| av_packet_side_data_free(&par->coded_side_data, &par->nb_coded_side_data); |
| |
| memset(par, 0, sizeof(*par)); |
| |
| par->codec_type = AVMEDIA_TYPE_UNKNOWN; |
| par->codec_id = AV_CODEC_ID_NONE; |
| par->format = -1; |
| par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; |
| par->field_order = AV_FIELD_UNKNOWN; |
| par->color_range = AVCOL_RANGE_UNSPECIFIED; |
| par->color_primaries = AVCOL_PRI_UNSPECIFIED; |
| par->color_trc = AVCOL_TRC_UNSPECIFIED; |
| par->color_space = AVCOL_SPC_UNSPECIFIED; |
| par->chroma_location = AVCHROMA_LOC_UNSPECIFIED; |
| par->sample_aspect_ratio = (AVRational){ 0, 1 }; |
| par->framerate = (AVRational){ 0, 1 }; |
| par->profile = AV_PROFILE_UNKNOWN; |
| par->level = AV_LEVEL_UNKNOWN; |
| } |
| |
| AVCodecParameters *avcodec_parameters_alloc(void) |
| { |
| AVCodecParameters *par = av_mallocz(sizeof(*par)); |
| |
| if (!par) |
| return NULL; |
| codec_parameters_reset(par); |
| return par; |
| } |
| |
| void avcodec_parameters_free(AVCodecParameters **ppar) |
| { |
| AVCodecParameters *par = *ppar; |
| |
| if (!par) |
| return; |
| codec_parameters_reset(par); |
| |
| av_freep(ppar); |
| } |
| |
| static int codec_parameters_copy_side_data(AVPacketSideData **pdst, int *pnb_dst, |
| const AVPacketSideData *src, int nb_src) |
| { |
| AVPacketSideData *dst; |
| int nb_dst = *pnb_dst; |
| |
| if (!src) |
| return 0; |
| |
| *pdst = dst = av_calloc(nb_src, sizeof(*dst)); |
| if (!dst) |
| return AVERROR(ENOMEM); |
| |
| for (int i = 0; i < nb_src; i++) { |
| const AVPacketSideData *src_sd = &src[i]; |
| AVPacketSideData *dst_sd = &dst[i]; |
| |
| dst_sd->data = av_memdup(src_sd->data, src_sd->size); |
| if (!dst_sd->data) |
| return AVERROR(ENOMEM); |
| |
| dst_sd->type = src_sd->type; |
| dst_sd->size = src_sd->size; |
| *pnb_dst = ++nb_dst; |
| } |
| |
| return 0; |
| } |
| |
| int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src) |
| { |
| int ret; |
| |
| codec_parameters_reset(dst); |
| memcpy(dst, src, sizeof(*dst)); |
| |
| dst->ch_layout = (AVChannelLayout){0}; |
| dst->extradata = NULL; |
| dst->extradata_size = 0; |
| dst->coded_side_data = NULL; |
| dst->nb_coded_side_data = 0; |
| if (src->extradata) { |
| dst->extradata = av_mallocz(src->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!dst->extradata) |
| return AVERROR(ENOMEM); |
| memcpy(dst->extradata, src->extradata, src->extradata_size); |
| dst->extradata_size = src->extradata_size; |
| } |
| ret = codec_parameters_copy_side_data(&dst->coded_side_data, &dst->nb_coded_side_data, |
| src->coded_side_data, src->nb_coded_side_data); |
| if (ret < 0) |
| return ret; |
| |
| ret = av_channel_layout_copy(&dst->ch_layout, &src->ch_layout); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| int avcodec_parameters_from_context(AVCodecParameters *par, |
| const AVCodecContext *codec) |
| { |
| int ret; |
| |
| codec_parameters_reset(par); |
| |
| par->codec_type = codec->codec_type; |
| par->codec_id = codec->codec_id; |
| par->codec_tag = codec->codec_tag; |
| |
| par->bit_rate = codec->bit_rate; |
| par->bits_per_coded_sample = codec->bits_per_coded_sample; |
| par->bits_per_raw_sample = codec->bits_per_raw_sample; |
| par->profile = codec->profile; |
| par->level = codec->level; |
| |
| switch (par->codec_type) { |
| case AVMEDIA_TYPE_VIDEO: |
| par->format = codec->pix_fmt; |
| par->width = codec->width; |
| par->height = codec->height; |
| par->field_order = codec->field_order; |
| par->color_range = codec->color_range; |
| par->color_primaries = codec->color_primaries; |
| par->color_trc = codec->color_trc; |
| par->color_space = codec->colorspace; |
| par->chroma_location = codec->chroma_sample_location; |
| par->sample_aspect_ratio = codec->sample_aspect_ratio; |
| par->video_delay = codec->has_b_frames; |
| par->framerate = codec->framerate; |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| par->format = codec->sample_fmt; |
| ret = av_channel_layout_copy(&par->ch_layout, &codec->ch_layout); |
| if (ret < 0) |
| return ret; |
| par->sample_rate = codec->sample_rate; |
| par->block_align = codec->block_align; |
| par->frame_size = codec->frame_size; |
| par->initial_padding = codec->initial_padding; |
| par->trailing_padding = codec->trailing_padding; |
| par->seek_preroll = codec->seek_preroll; |
| break; |
| case AVMEDIA_TYPE_SUBTITLE: |
| par->width = codec->width; |
| par->height = codec->height; |
| break; |
| } |
| |
| if (codec->extradata) { |
| par->extradata = av_mallocz(codec->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!par->extradata) |
| return AVERROR(ENOMEM); |
| memcpy(par->extradata, codec->extradata, codec->extradata_size); |
| par->extradata_size = codec->extradata_size; |
| } |
| |
| ret = codec_parameters_copy_side_data(&par->coded_side_data, &par->nb_coded_side_data, |
| codec->coded_side_data, codec->nb_coded_side_data); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| int avcodec_parameters_to_context(AVCodecContext *codec, |
| const AVCodecParameters *par) |
| { |
| int ret; |
| |
| codec->codec_type = par->codec_type; |
| codec->codec_id = par->codec_id; |
| codec->codec_tag = par->codec_tag; |
| |
| codec->bit_rate = par->bit_rate; |
| codec->bits_per_coded_sample = par->bits_per_coded_sample; |
| codec->bits_per_raw_sample = par->bits_per_raw_sample; |
| codec->profile = par->profile; |
| codec->level = par->level; |
| |
| switch (par->codec_type) { |
| case AVMEDIA_TYPE_VIDEO: |
| codec->pix_fmt = par->format; |
| codec->width = par->width; |
| codec->height = par->height; |
| codec->field_order = par->field_order; |
| codec->color_range = par->color_range; |
| codec->color_primaries = par->color_primaries; |
| codec->color_trc = par->color_trc; |
| codec->colorspace = par->color_space; |
| codec->chroma_sample_location = par->chroma_location; |
| codec->sample_aspect_ratio = par->sample_aspect_ratio; |
| codec->has_b_frames = par->video_delay; |
| codec->framerate = par->framerate; |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| codec->sample_fmt = par->format; |
| ret = av_channel_layout_copy(&codec->ch_layout, &par->ch_layout); |
| if (ret < 0) |
| return ret; |
| codec->sample_rate = par->sample_rate; |
| codec->block_align = par->block_align; |
| codec->frame_size = par->frame_size; |
| codec->delay = |
| codec->initial_padding = par->initial_padding; |
| codec->trailing_padding = par->trailing_padding; |
| codec->seek_preroll = par->seek_preroll; |
| break; |
| case AVMEDIA_TYPE_SUBTITLE: |
| codec->width = par->width; |
| codec->height = par->height; |
| break; |
| } |
| |
| av_freep(&codec->extradata); |
| codec->extradata_size = 0; |
| if (par->extradata) { |
| codec->extradata = av_mallocz(par->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!codec->extradata) |
| return AVERROR(ENOMEM); |
| memcpy(codec->extradata, par->extradata, par->extradata_size); |
| codec->extradata_size = par->extradata_size; |
| } |
| |
| av_packet_side_data_free(&codec->coded_side_data, &codec->nb_coded_side_data); |
| ret = codec_parameters_copy_side_data(&codec->coded_side_data, &codec->nb_coded_side_data, |
| par->coded_side_data, par->nb_coded_side_data); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |