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FFmpeg/libavcodec/codec_par.c
James Almer 21d7cc6fa9 avcodec/codec_par: add side data to AVCodecParameters 
This will simplify the propagation of side data to decoders and from encoders.
Global side data will now reside in the AVCodecContext, thus be available
during init(), removing the need to propagate it inside packets.

Global and frame specific side data will therefore be distinct.

Signed-off-by: James Almer <jamrial@gmail.com>
2023-10-06 09:56:41 -03:00

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/*
* 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;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
// if the old/new fields are set inconsistently, prefer the old ones
if ((codec->channels && codec->channels != codec->ch_layout.nb_channels) ||
(codec->channel_layout && (codec->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
codec->ch_layout.u.mask != codec->channel_layout))) {
if (codec->channel_layout)
av_channel_layout_from_mask(&par->ch_layout, codec->channel_layout);
else {
par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
par->ch_layout.nb_channels = codec->channels;
}
FF_ENABLE_DEPRECATION_WARNINGS
} else {
#endif
ret = av_channel_layout_copy(&par->ch_layout, &codec->ch_layout);
if (ret < 0)
return ret;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
}
par->channel_layout = par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
par->ch_layout.u.mask : 0;
par->channels = par->ch_layout.nb_channels;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
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;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
// if the old/new fields are set inconsistently, prefer the old ones
if ((par->channels && par->channels != par->ch_layout.nb_channels) ||
(par->channel_layout && (par->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
par->ch_layout.u.mask != par->channel_layout))) {
if (par->channel_layout)
av_channel_layout_from_mask(&codec->ch_layout, par->channel_layout);
else {
codec->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
codec->ch_layout.nb_channels = par->channels;
}
FF_ENABLE_DEPRECATION_WARNINGS
} else {
#endif
ret = av_channel_layout_copy(&codec->ch_layout, &par->ch_layout);
if (ret < 0)
return ret;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
}
codec->channel_layout = codec->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
codec->ch_layout.u.mask : 0;
codec->channels = codec->ch_layout.nb_channels;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
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);
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;
}
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