/* * 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;}