mirror of https://github.com/FFmpeg/FFmpeg.git
All decoding code will be moved to this file in the future.pull/389/head
Anton Khirnov
2 years ago
parent
ff92ecad2f
commit
9ce1a041d8
4 changed files with 139 additions and 110 deletions
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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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#include "libavutil/dict.h" |
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#include "libavutil/error.h" |
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#include "libavutil/log.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/pixfmt.h" |
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#include "libavcodec/avcodec.h" |
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#include "libavcodec/codec.h" |
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#include "ffmpeg.h" |
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static void abort_codec_experimental(const AVCodec *c, int encoder) |
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{ |
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exit_program(1); |
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} |
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static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts) |
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{ |
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InputStream *ist = s->opaque; |
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const enum AVPixelFormat *p; |
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int ret; |
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for (p = pix_fmts; *p != AV_PIX_FMT_NONE; p++) { |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p); |
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const AVCodecHWConfig *config = NULL; |
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int i; |
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) |
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break; |
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if (ist->hwaccel_id == HWACCEL_GENERIC || |
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ist->hwaccel_id == HWACCEL_AUTO) { |
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for (i = 0;; i++) { |
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config = avcodec_get_hw_config(s->codec, i); |
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if (!config) |
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break; |
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if (!(config->methods & |
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AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)) |
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continue; |
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if (config->pix_fmt == *p) |
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break; |
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} |
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} |
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if (config && config->device_type == ist->hwaccel_device_type) { |
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ret = hwaccel_decode_init(s); |
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if (ret < 0) { |
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if (ist->hwaccel_id == HWACCEL_GENERIC) { |
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av_log(NULL, AV_LOG_FATAL, |
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"%s hwaccel requested for input stream #%d:%d, " |
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"but cannot be initialized.\n", |
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av_hwdevice_get_type_name(config->device_type), |
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ist->file_index, ist->st->index); |
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return AV_PIX_FMT_NONE; |
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} |
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continue; |
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} |
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ist->hwaccel_pix_fmt = *p; |
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break; |
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} |
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} |
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return *p; |
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} |
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int dec_open(InputStream *ist) |
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{ |
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const AVCodec *codec = ist->dec; |
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int ret; |
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if (!codec) { |
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av_log(ist, AV_LOG_ERROR, |
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"Decoding requested, but no decoder found for: %s\n", |
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avcodec_get_name(ist->dec_ctx->codec_id)); |
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return AVERROR(EINVAL); |
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} |
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ist->dec_ctx->opaque = ist; |
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ist->dec_ctx->get_format = get_format; |
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if (ist->dec_ctx->codec_id == AV_CODEC_ID_DVB_SUBTITLE && |
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(ist->decoding_needed & DECODING_FOR_OST)) { |
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av_dict_set(&ist->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE); |
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if (ist->decoding_needed & DECODING_FOR_FILTER) |
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av_log(NULL, AV_LOG_WARNING, "Warning using DVB subtitles for filtering and output at the same time is not fully supported, also see -compute_edt [0|1]\n"); |
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} |
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/* Useful for subtitles retiming by lavf (FIXME), skipping samples in
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* audio, and video decoders such as cuvid or mediacodec */ |
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ist->dec_ctx->pkt_timebase = ist->st->time_base; |
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if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0)) |
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av_dict_set(&ist->decoder_opts, "threads", "auto", 0); |
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/* Attached pics are sparse, therefore we would not want to delay their decoding till EOF. */ |
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if (ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC) |
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av_dict_set(&ist->decoder_opts, "threads", "1", 0); |
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ret = hw_device_setup_for_decode(ist); |
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if (ret < 0) { |
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av_log(ist, AV_LOG_ERROR, |
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"Hardware device setup failed for decoder: %s\n", |
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av_err2str(ret)); |
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return ret; |
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} |
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if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) { |
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if (ret == AVERROR_EXPERIMENTAL) |
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abort_codec_experimental(codec, 0); |
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av_log(ist, AV_LOG_ERROR, "Error while opening decoder: %s\n", |
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av_err2str(ret)); |
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return ret; |
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} |
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assert_avoptions(ist->decoder_opts); |
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return 0; |
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} |
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