mirror of
https://github.com/mpv-player/mpv
synced 2024-12-28 01:52:19 +00:00
21e4f1680c
We consider FFmpeg 1.x and Libav 0.9.x releases compatible. Support
for FFmpeg 0.9.x and Libav 0.8.x is considered infeasible and has been
dropped in the previous commits. The bits that break compatibility are
mainly the CodecID renaming (trivial, but would require nasty hacks
everywhere), the avcodec_encode_video2() function (missing in older
releases, mandatory in newer ones), and the resampler changes (older
releases miss lib{av,sw}resample, newer versions removed the
libavcodec resampler).
Remove some other compatibility bits that were needed to for releases
for which we drop support.
The comment about Libav 0.9 in compat/libav.h is incorrect and should
have been 0.8 (the symbol is present in Libav 0.9).
108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <libavutil/common.h>
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#include "core/mp_talloc.h"
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#include "av_common.h"
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#include "codecs.h"
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// Copy the codec-related fields from st into avctx. This does not set the
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// codec itself, only codec related header data provided by libavformat.
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// The goal is to initialize a new decoder with the header data provided by
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// libavformat, and unlike avcodec_copy_context(), allow the user to create
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// a clean AVCodecContext for a manually selected AVCodec.
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// This is strictly for decoding only.
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void mp_copy_lav_codec_headers(AVCodecContext *avctx, AVCodecContext *st)
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{
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if (st->extradata_size) {
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av_free(avctx->extradata);
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avctx->extradata_size = 0;
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avctx->extradata =
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av_mallocz(st->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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if (avctx->extradata) {
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avctx->extradata_size = st->extradata_size;
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memcpy(avctx->extradata, st->extradata, st->extradata_size);
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}
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}
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avctx->codec_tag = st->codec_tag;
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avctx->stream_codec_tag = st->stream_codec_tag;
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avctx->bit_rate = st->bit_rate;
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avctx->width = st->width;
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avctx->height = st->height;
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avctx->pix_fmt = st->pix_fmt;
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avctx->sample_aspect_ratio = st->sample_aspect_ratio;
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avctx->chroma_sample_location = st->chroma_sample_location;
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avctx->sample_rate = st->sample_rate;
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avctx->channels = st->channels;
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avctx->block_align = st->block_align;
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avctx->channel_layout = st->channel_layout;
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avctx->audio_service_type = st->audio_service_type;
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avctx->bits_per_coded_sample = st->bits_per_coded_sample;
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}
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void mp_add_lavc_decoders(struct mp_decoder_list *list, enum AVMediaType type)
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{
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AVCodec *cur = NULL;
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for (;;) {
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cur = av_codec_next(cur);
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if (!cur)
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break;
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if (av_codec_is_decoder(cur) && cur->type == type) {
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struct mp_decoder_entry entry = {
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.family = "lavc",
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.codec = mp_codec_from_av_codec_id(cur->id),
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.decoder = cur->name,
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.desc = cur->long_name,
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};
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assert(entry.family);
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MP_TARRAY_APPEND(list, list->entries, list->num_entries, entry);
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}
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}
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}
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int mp_codec_to_av_codec_id(const char *codec)
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{
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int id = AV_CODEC_ID_NONE;
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const AVCodecDescriptor *desc = avcodec_descriptor_get_by_name(codec);
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if (desc)
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id = desc->id;
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if (id == AV_CODEC_ID_NONE) {
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AVCodec *avcodec = avcodec_find_decoder_by_name(codec);
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if (avcodec)
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id = avcodec->id;
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}
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return id;
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}
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const char *mp_codec_from_av_codec_id(int codec_id)
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{
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const char *name = NULL;
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const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
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if (desc)
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name = desc->name;
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if (!name) {
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AVCodec *avcodec = avcodec_find_decoder(codec_id);
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if (avcodec)
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name = avcodec->name;
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}
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return name;
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}
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