269 lines
9.1 KiB
C
269 lines
9.1 KiB
C
/*
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* AVCodecParameters functions for libavcodec
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* AVCodecParameters functions for libavcodec.
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*/
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#include <string.h>
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#include "libavutil/mem.h"
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#include "avcodec.h"
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#include "codec_par.h"
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#include "packet.h"
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static void codec_parameters_reset(AVCodecParameters *par)
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{
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av_freep(&par->extradata);
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av_channel_layout_uninit(&par->ch_layout);
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av_packet_side_data_free(&par->coded_side_data, &par->nb_coded_side_data);
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memset(par, 0, sizeof(*par));
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par->codec_type = AVMEDIA_TYPE_UNKNOWN;
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par->codec_id = AV_CODEC_ID_NONE;
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par->format = -1;
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par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
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par->field_order = AV_FIELD_UNKNOWN;
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par->color_range = AVCOL_RANGE_UNSPECIFIED;
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par->color_primaries = AVCOL_PRI_UNSPECIFIED;
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par->color_trc = AVCOL_TRC_UNSPECIFIED;
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par->color_space = AVCOL_SPC_UNSPECIFIED;
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par->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
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par->sample_aspect_ratio = (AVRational){ 0, 1 };
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par->framerate = (AVRational){ 0, 1 };
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par->profile = AV_PROFILE_UNKNOWN;
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par->level = AV_LEVEL_UNKNOWN;
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}
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AVCodecParameters *avcodec_parameters_alloc(void)
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{
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AVCodecParameters *par = av_mallocz(sizeof(*par));
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if (!par)
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return NULL;
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codec_parameters_reset(par);
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return par;
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}
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void avcodec_parameters_free(AVCodecParameters **ppar)
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{
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AVCodecParameters *par = *ppar;
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if (!par)
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return;
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codec_parameters_reset(par);
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av_freep(ppar);
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}
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static int codec_parameters_copy_side_data(AVPacketSideData **pdst, int *pnb_dst,
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const AVPacketSideData *src, int nb_src)
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{
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AVPacketSideData *dst;
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int nb_dst = *pnb_dst;
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if (!src)
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return 0;
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*pdst = dst = av_calloc(nb_src, sizeof(*dst));
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if (!dst)
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return AVERROR(ENOMEM);
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for (int i = 0; i < nb_src; i++) {
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const AVPacketSideData *src_sd = &src[i];
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AVPacketSideData *dst_sd = &dst[i];
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dst_sd->data = av_memdup(src_sd->data, src_sd->size);
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if (!dst_sd->data)
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return AVERROR(ENOMEM);
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dst_sd->type = src_sd->type;
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dst_sd->size = src_sd->size;
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*pnb_dst = ++nb_dst;
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}
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return 0;
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}
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int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
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{
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int ret;
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codec_parameters_reset(dst);
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memcpy(dst, src, sizeof(*dst));
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dst->ch_layout = (AVChannelLayout){0};
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dst->extradata = NULL;
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dst->extradata_size = 0;
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dst->coded_side_data = NULL;
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dst->nb_coded_side_data = 0;
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if (src->extradata) {
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dst->extradata = av_mallocz(src->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!dst->extradata)
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return AVERROR(ENOMEM);
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memcpy(dst->extradata, src->extradata, src->extradata_size);
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dst->extradata_size = src->extradata_size;
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}
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ret = codec_parameters_copy_side_data(&dst->coded_side_data, &dst->nb_coded_side_data,
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src->coded_side_data, src->nb_coded_side_data);
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if (ret < 0)
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return ret;
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ret = av_channel_layout_copy(&dst->ch_layout, &src->ch_layout);
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if (ret < 0)
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return ret;
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return 0;
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}
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int avcodec_parameters_from_context(AVCodecParameters *par,
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const AVCodecContext *codec)
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{
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int ret;
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codec_parameters_reset(par);
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par->codec_type = codec->codec_type;
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par->codec_id = codec->codec_id;
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par->codec_tag = codec->codec_tag;
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par->bit_rate = codec->bit_rate;
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par->bits_per_coded_sample = codec->bits_per_coded_sample;
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par->bits_per_raw_sample = codec->bits_per_raw_sample;
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par->profile = codec->profile;
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par->level = codec->level;
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switch (par->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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par->format = codec->pix_fmt;
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par->width = codec->width;
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par->height = codec->height;
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par->field_order = codec->field_order;
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par->color_range = codec->color_range;
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par->color_primaries = codec->color_primaries;
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par->color_trc = codec->color_trc;
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par->color_space = codec->colorspace;
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par->chroma_location = codec->chroma_sample_location;
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par->sample_aspect_ratio = codec->sample_aspect_ratio;
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par->video_delay = codec->has_b_frames;
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par->framerate = codec->framerate;
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break;
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case AVMEDIA_TYPE_AUDIO:
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par->format = codec->sample_fmt;
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ret = av_channel_layout_copy(&par->ch_layout, &codec->ch_layout);
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if (ret < 0)
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return ret;
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par->sample_rate = codec->sample_rate;
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par->block_align = codec->block_align;
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par->frame_size = codec->frame_size;
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par->initial_padding = codec->initial_padding;
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par->trailing_padding = codec->trailing_padding;
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par->seek_preroll = codec->seek_preroll;
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break;
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case AVMEDIA_TYPE_SUBTITLE:
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par->width = codec->width;
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par->height = codec->height;
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break;
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}
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if (codec->extradata) {
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par->extradata = av_mallocz(codec->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!par->extradata)
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return AVERROR(ENOMEM);
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memcpy(par->extradata, codec->extradata, codec->extradata_size);
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par->extradata_size = codec->extradata_size;
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}
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ret = codec_parameters_copy_side_data(&par->coded_side_data, &par->nb_coded_side_data,
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codec->coded_side_data, codec->nb_coded_side_data);
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if (ret < 0)
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return ret;
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return 0;
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}
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int avcodec_parameters_to_context(AVCodecContext *codec,
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const AVCodecParameters *par)
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{
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int ret;
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codec->codec_type = par->codec_type;
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codec->codec_id = par->codec_id;
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codec->codec_tag = par->codec_tag;
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codec->bit_rate = par->bit_rate;
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codec->bits_per_coded_sample = par->bits_per_coded_sample;
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codec->bits_per_raw_sample = par->bits_per_raw_sample;
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codec->profile = par->profile;
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codec->level = par->level;
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switch (par->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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codec->pix_fmt = par->format;
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codec->width = par->width;
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codec->height = par->height;
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codec->field_order = par->field_order;
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codec->color_range = par->color_range;
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codec->color_primaries = par->color_primaries;
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codec->color_trc = par->color_trc;
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codec->colorspace = par->color_space;
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codec->chroma_sample_location = par->chroma_location;
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codec->sample_aspect_ratio = par->sample_aspect_ratio;
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codec->has_b_frames = par->video_delay;
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codec->framerate = par->framerate;
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break;
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case AVMEDIA_TYPE_AUDIO:
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codec->sample_fmt = par->format;
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ret = av_channel_layout_copy(&codec->ch_layout, &par->ch_layout);
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if (ret < 0)
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return ret;
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codec->sample_rate = par->sample_rate;
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codec->block_align = par->block_align;
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codec->frame_size = par->frame_size;
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codec->delay =
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codec->initial_padding = par->initial_padding;
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codec->trailing_padding = par->trailing_padding;
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codec->seek_preroll = par->seek_preroll;
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break;
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case AVMEDIA_TYPE_SUBTITLE:
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codec->width = par->width;
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codec->height = par->height;
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break;
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}
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av_freep(&codec->extradata);
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if (par->extradata) {
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codec->extradata = av_mallocz(par->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!codec->extradata)
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return AVERROR(ENOMEM);
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memcpy(codec->extradata, par->extradata, par->extradata_size);
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codec->extradata_size = par->extradata_size;
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}
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av_packet_side_data_free(&codec->coded_side_data, &codec->nb_coded_side_data);
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ret = codec_parameters_copy_side_data(&codec->coded_side_data, &codec->nb_coded_side_data,
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par->coded_side_data, par->nb_coded_side_data);
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if (ret < 0)
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return ret;
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return 0;
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}
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