mpv/core/av_common.c

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core: redo how codecs are mapped, remove codecs.conf Use codec names instead of FourCCs to identify codecs. Rewrite how codecs are selected and initialized. Now each decoder exports a list of decoders (and the codec it supports) via add_decoders(). The order matters, and the first decoder for a given decoder is preferred over the other decoders. E.g. all ad_mpg123 decoders are preferred over ad_lavc, because it comes first in the mpcodecs_ad_drivers array. Likewise, decoders within ad_lavc that are enumerated first by libavcodec (using av_codec_next()) are preferred. (This is actually critical to select h264 software decoding by default instead of vdpau. libavcodec and ffmpeg/avconv use the same method to select decoders by default, so we hope this is sane.) The codec names follow libavcodec's codec names as defined by AVCodecDescriptor.name (see libavcodec/codec_desc.c). Some decoders have names different from the canonical codec name. The AVCodecDescriptor API is relatively new, so we need a compatibility layer for older libavcodec versions for codec names that are referenced internally, and which are different from the decoder name. (Add a configure check for that, because checking versions is getting way too messy.) demux/codec_tags.c is generated from the former codecs.conf (minus "special" decoders like vdpau, and excluding the mappings that are the same as the mappings libavformat's exported RIFF tables). It contains all the mappings from FourCCs to codec name. This is needed for demux_mkv, demux_mpg, demux_avi and demux_asf. demux_lavf will set the codec as determined by libavformat, while the other demuxers have to do this on their own, using the mp_set_audio/video_codec_from_tag() functions. Note that the sh_audio/video->format members don't uniquely identify the codec anymore, and sh->codec takes over this role. Replace the --ac/--vc/--afm/--vfm with new --vd/--ad options, which provide cover the functionality of the removed switched. Note: there's no CODECS_FLAG_FLIP flag anymore. This means some obscure container/video combinations (e.g. the sample Film_200_zygo_pro.mov) are played flipped. ffplay/avplay doesn't handle this properly either, so we don't care and blame ffmeg/libav instead.
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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
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#include <libavutil/common.h>
core: redo how codecs are mapped, remove codecs.conf Use codec names instead of FourCCs to identify codecs. Rewrite how codecs are selected and initialized. Now each decoder exports a list of decoders (and the codec it supports) via add_decoders(). The order matters, and the first decoder for a given decoder is preferred over the other decoders. E.g. all ad_mpg123 decoders are preferred over ad_lavc, because it comes first in the mpcodecs_ad_drivers array. Likewise, decoders within ad_lavc that are enumerated first by libavcodec (using av_codec_next()) are preferred. (This is actually critical to select h264 software decoding by default instead of vdpau. libavcodec and ffmpeg/avconv use the same method to select decoders by default, so we hope this is sane.) The codec names follow libavcodec's codec names as defined by AVCodecDescriptor.name (see libavcodec/codec_desc.c). Some decoders have names different from the canonical codec name. The AVCodecDescriptor API is relatively new, so we need a compatibility layer for older libavcodec versions for codec names that are referenced internally, and which are different from the decoder name. (Add a configure check for that, because checking versions is getting way too messy.) demux/codec_tags.c is generated from the former codecs.conf (minus "special" decoders like vdpau, and excluding the mappings that are the same as the mappings libavformat's exported RIFF tables). It contains all the mappings from FourCCs to codec name. This is needed for demux_mkv, demux_mpg, demux_avi and demux_asf. demux_lavf will set the codec as determined by libavformat, while the other demuxers have to do this on their own, using the mp_set_audio/video_codec_from_tag() functions. Note that the sh_audio/video->format members don't uniquely identify the codec anymore, and sh->codec takes over this role. Replace the --ac/--vc/--afm/--vfm with new --vd/--ad options, which provide cover the functionality of the removed switched. Note: there's no CODECS_FLAG_FLIP flag anymore. This means some obscure container/video combinations (e.g. the sample Film_200_zygo_pro.mov) are played flipped. ffplay/avplay doesn't handle this properly either, so we don't care and blame ffmeg/libav instead.
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#include "config.h"
#include "core/mp_talloc.h"
#include "av_common.h"
#include "codecs.h"
// Copy the codec-related fields from st into avctx. This does not set the
// codec itself, only codec related header data provided by libavformat.
// The goal is to initialize a new decoder with the header data provided by
// libavformat, and unlike avcodec_copy_context(), allow the user to create
// a clean AVCodecContext for a manually selected AVCodec.
// This is strictly for decoding only.
void mp_copy_lav_codec_headers(AVCodecContext *avctx, AVCodecContext *st)
{
if (st->extradata_size) {
av_free(avctx->extradata);
avctx->extradata_size = 0;
avctx->extradata =
av_mallocz(st->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (avctx->extradata) {
avctx->extradata_size = st->extradata_size;
memcpy(avctx->extradata, st->extradata, st->extradata_size);
}
}
avctx->codec_tag = st->codec_tag;
avctx->stream_codec_tag = st->stream_codec_tag;
avctx->bit_rate = st->bit_rate;
avctx->width = st->width;
avctx->height = st->height;
avctx->pix_fmt = st->pix_fmt;
avctx->sample_aspect_ratio = st->sample_aspect_ratio;
avctx->chroma_sample_location = st->chroma_sample_location;
avctx->sample_rate = st->sample_rate;
avctx->channels = st->channels;
avctx->block_align = st->block_align;
avctx->channel_layout = st->channel_layout;
avctx->audio_service_type = st->audio_service_type;
avctx->bits_per_coded_sample = st->bits_per_coded_sample;
}
core: redo how codecs are mapped, remove codecs.conf Use codec names instead of FourCCs to identify codecs. Rewrite how codecs are selected and initialized. Now each decoder exports a list of decoders (and the codec it supports) via add_decoders(). The order matters, and the first decoder for a given decoder is preferred over the other decoders. E.g. all ad_mpg123 decoders are preferred over ad_lavc, because it comes first in the mpcodecs_ad_drivers array. Likewise, decoders within ad_lavc that are enumerated first by libavcodec (using av_codec_next()) are preferred. (This is actually critical to select h264 software decoding by default instead of vdpau. libavcodec and ffmpeg/avconv use the same method to select decoders by default, so we hope this is sane.) The codec names follow libavcodec's codec names as defined by AVCodecDescriptor.name (see libavcodec/codec_desc.c). Some decoders have names different from the canonical codec name. The AVCodecDescriptor API is relatively new, so we need a compatibility layer for older libavcodec versions for codec names that are referenced internally, and which are different from the decoder name. (Add a configure check for that, because checking versions is getting way too messy.) demux/codec_tags.c is generated from the former codecs.conf (minus "special" decoders like vdpau, and excluding the mappings that are the same as the mappings libavformat's exported RIFF tables). It contains all the mappings from FourCCs to codec name. This is needed for demux_mkv, demux_mpg, demux_avi and demux_asf. demux_lavf will set the codec as determined by libavformat, while the other demuxers have to do this on their own, using the mp_set_audio/video_codec_from_tag() functions. Note that the sh_audio/video->format members don't uniquely identify the codec anymore, and sh->codec takes over this role. Replace the --ac/--vc/--afm/--vfm with new --vd/--ad options, which provide cover the functionality of the removed switched. Note: there's no CODECS_FLAG_FLIP flag anymore. This means some obscure container/video combinations (e.g. the sample Film_200_zygo_pro.mov) are played flipped. ffplay/avplay doesn't handle this properly either, so we don't care and blame ffmeg/libav instead.
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#if !HAVE_AVCODEC_IS_DECODER_API
static int av_codec_is_decoder(AVCodec *codec)
{
return !!codec->decode;
}
#endif
void mp_add_lavc_decoders(struct mp_decoder_list *list, enum AVMediaType type)
{
AVCodec *cur = NULL;
for (;;) {
cur = av_codec_next(cur);
if (!cur)
break;
if (av_codec_is_decoder(cur) && cur->type == type) {
struct mp_decoder_entry entry = {
.family = "lavc",
.codec = mp_codec_from_av_codec_id(cur->id),
.decoder = cur->name,
.desc = cur->long_name,
};
assert(entry.family);
MP_TARRAY_APPEND(list, list->entries, list->num_entries, entry);
}
}
}
#if HAVE_AVCODEC_CODEC_DESC_API
int mp_codec_to_av_codec_id(const char *codec)
{
const AVCodecDescriptor *desc = avcodec_descriptor_get_by_name(codec);
return desc ? desc->id : CODEC_ID_NONE;
}
const char *mp_codec_from_av_codec_id(int codec_id)
{
const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
return desc ? desc->name : NULL;
}
#else
struct mp_av_codec {
const char *name;
int codec_id;
};
// Some decoders have a different name from the canonical codec name, for
// example the codec "dts" CODEC_ID_DTS has the decoder named "dca", and
// avcodec_find_decoder_by_name("dts") would return 0. We always want the
// canonical name.
// On newer lavc versions, avcodec_descriptor_get_by_name("dts") will return
// CODEC_ID_DTS, which is what we want, but for older versions we need this
// lookup table.
struct mp_av_codec mp_av_codec_id_list[] = {
{"ra_144", CODEC_ID_RA_144},
{"ra_288", CODEC_ID_RA_288},
{"smackaudio", CODEC_ID_SMACKAUDIO},
{"dts", CODEC_ID_DTS},
{"musepack7", CODEC_ID_MUSEPACK7},
{"musepack8", CODEC_ID_MUSEPACK8},
{"amr_nb", CODEC_ID_AMR_NB},
{"amr_wb", CODEC_ID_AMR_WB},
{"adpcm_g722", CODEC_ID_ADPCM_G722},
{"adpcm_g726", CODEC_ID_ADPCM_G726},
{"westwood_snd1", CODEC_ID_WESTWOOD_SND1},
{"mp4als", CODEC_ID_MP4ALS},
{"vixl", CODEC_ID_VIXL},
{"flv1", CODEC_ID_FLV1},
{"msmpeg4v3", CODEC_ID_MSMPEG4V3},
{"jpeg2000", CODEC_ID_JPEG2000},
{"ulti", CODEC_ID_ULTI},
{"smackvideo", CODEC_ID_SMACKVIDEO},
{"tscc", CODEC_ID_TSCC},
{"cscd", CODEC_ID_CSCD},
{"tgv", CODEC_ID_TGV},
{"roq", CODEC_ID_ROQ},
{"idcin", CODEC_ID_IDCIN},
{"ws_vqa", CODEC_ID_WS_VQA},
{0},
};
int mp_codec_to_av_codec_id(const char *codec)
{
for (int n = 0; mp_av_codec_id_list[n].name; n++) {
if (strcmp(mp_av_codec_id_list[n].name, codec) == 0)
return mp_av_codec_id_list[n].codec_id;
}
AVCodec *avcodec = avcodec_find_decoder_by_name(codec);
return avcodec ? avcodec->id : CODEC_ID_NONE;
}
const char *mp_codec_from_av_codec_id(int codec_id)
{
for (int n = 0; mp_av_codec_id_list[n].name; n++) {
if (mp_av_codec_id_list[n].codec_id == codec_id)
return mp_av_codec_id_list[n].name;
}
AVCodec *avcodec = avcodec_find_decoder(codec_id);
return avcodec ? avcodec->name : NULL;
}
#endif