From 734eee1af2c21976e8f57c4ca498593a305fb22e Mon Sep 17 00:00:00 2001 From: Xavier Del Campo Romero Date: Sun, 3 Jan 2021 02:06:58 +0100 Subject: Remove ffmpeg binary from project --- Music/ffmpeg/doc/examples/transcoding.c | 585 -------------------------------- 1 file changed, 585 deletions(-) delete mode 100644 Music/ffmpeg/doc/examples/transcoding.c (limited to 'Music/ffmpeg/doc/examples/transcoding.c') diff --git a/Music/ffmpeg/doc/examples/transcoding.c b/Music/ffmpeg/doc/examples/transcoding.c deleted file mode 100644 index 8633362..0000000 --- a/Music/ffmpeg/doc/examples/transcoding.c +++ /dev/null @@ -1,585 +0,0 @@ -/* - * Copyright (c) 2010 Nicolas George - * Copyright (c) 2011 Stefano Sabatini - * Copyright (c) 2014 Andrey Utkin - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -/** - * @file - * API example for demuxing, decoding, filtering, encoding and muxing - * @example transcoding.c - */ - -#include -#include -#include -#include -#include -#include -#include - -static AVFormatContext *ifmt_ctx; -static AVFormatContext *ofmt_ctx; -typedef struct FilteringContext { - AVFilterContext *buffersink_ctx; - AVFilterContext *buffersrc_ctx; - AVFilterGraph *filter_graph; -} FilteringContext; -static FilteringContext *filter_ctx; - -static int open_input_file(const char *filename) -{ - int ret; - unsigned int i; - - ifmt_ctx = NULL; - if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, NULL)) < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n"); - return ret; - } - - if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n"); - return ret; - } - - for (i = 0; i < ifmt_ctx->nb_streams; i++) { - AVStream *stream; - AVCodecContext *codec_ctx; - stream = ifmt_ctx->streams[i]; - codec_ctx = stream->codec; - /* Reencode video & audio and remux subtitles etc. */ - if (codec_ctx->codec_type == AVMEDIA_TYPE_VIDEO - || codec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { - /* Open decoder */ - ret = avcodec_open2(codec_ctx, - avcodec_find_decoder(codec_ctx->codec_id), NULL); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Failed to open decoder for stream #%u\n", i); - return ret; - } - } - } - - av_dump_format(ifmt_ctx, 0, filename, 0); - return 0; -} - -static int open_output_file(const char *filename) -{ - AVStream *out_stream; - AVStream *in_stream; - AVCodecContext *dec_ctx, *enc_ctx; - AVCodec *encoder; - int ret; - unsigned int i; - - ofmt_ctx = NULL; - avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, filename); - if (!ofmt_ctx) { - av_log(NULL, AV_LOG_ERROR, "Could not create output context\n"); - return AVERROR_UNKNOWN; - } - - - for (i = 0; i < ifmt_ctx->nb_streams; i++) { - out_stream = avformat_new_stream(ofmt_ctx, NULL); - if (!out_stream) { - av_log(NULL, AV_LOG_ERROR, "Failed allocating output stream\n"); - return AVERROR_UNKNOWN; - } - - in_stream = ifmt_ctx->streams[i]; - dec_ctx = in_stream->codec; - enc_ctx = out_stream->codec; - - if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO - || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { - /* in this example, we choose transcoding to same codec */ - encoder = avcodec_find_encoder(dec_ctx->codec_id); - if (!encoder) { - av_log(NULL, AV_LOG_FATAL, "Necessary encoder not found\n"); - return AVERROR_INVALIDDATA; - } - - /* In this example, we transcode to same properties (picture size, - * sample rate etc.). These properties can be changed for output - * streams easily using filters */ - if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { - enc_ctx->height = dec_ctx->height; - enc_ctx->width = dec_ctx->width; - enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio; - /* take first format from list of supported formats */ - if (encoder->pix_fmts) - enc_ctx->pix_fmt = encoder->pix_fmts[0]; - else - enc_ctx->pix_fmt = dec_ctx->pix_fmt; - /* video time_base can be set to whatever is handy and supported by encoder */ - enc_ctx->time_base = dec_ctx->time_base; - } else { - enc_ctx->sample_rate = dec_ctx->sample_rate; - enc_ctx->channel_layout = dec_ctx->channel_layout; - enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); - /* take first format from list of supported formats */ - enc_ctx->sample_fmt = encoder->sample_fmts[0]; - enc_ctx->time_base = (AVRational){1, enc_ctx->sample_rate}; - } - - /* Third parameter can be used to pass settings to encoder */ - ret = avcodec_open2(enc_ctx, encoder, NULL); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot open video encoder for stream #%u\n", i); - return ret; - } - } else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) { - av_log(NULL, AV_LOG_FATAL, "Elementary stream #%d is of unknown type, cannot proceed\n", i); - return AVERROR_INVALIDDATA; - } else { - /* if this stream must be remuxed */ - ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec, - ifmt_ctx->streams[i]->codec); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Copying stream context failed\n"); - return ret; - } - } - - if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER) - enc_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; - - } - av_dump_format(ofmt_ctx, 0, filename, 1); - - if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) { - ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Could not open output file '%s'", filename); - return ret; - } - } - - /* init muxer, write output file header */ - ret = avformat_write_header(ofmt_ctx, NULL); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Error occurred when opening output file\n"); - return ret; - } - - return 0; -} - -static int init_filter(FilteringContext* fctx, AVCodecContext *dec_ctx, - AVCodecContext *enc_ctx, const char *filter_spec) -{ - char args[512]; - int ret = 0; - AVFilter *buffersrc = NULL; - AVFilter *buffersink = NULL; - AVFilterContext *buffersrc_ctx = NULL; - AVFilterContext *buffersink_ctx = NULL; - AVFilterInOut *outputs = avfilter_inout_alloc(); - AVFilterInOut *inputs = avfilter_inout_alloc(); - AVFilterGraph *filter_graph = avfilter_graph_alloc(); - - if (!outputs || !inputs || !filter_graph) { - ret = AVERROR(ENOMEM); - goto end; - } - - if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) { - buffersrc = avfilter_get_by_name("buffer"); - buffersink = avfilter_get_by_name("buffersink"); - if (!buffersrc || !buffersink) { - av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); - ret = AVERROR_UNKNOWN; - goto end; - } - - snprintf(args, sizeof(args), - "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d", - dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt, - dec_ctx->time_base.num, dec_ctx->time_base.den, - dec_ctx->sample_aspect_ratio.num, - dec_ctx->sample_aspect_ratio.den); - - ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", - args, NULL, filter_graph); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n"); - goto end; - } - - ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", - NULL, NULL, filter_graph); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n"); - goto end; - } - - ret = av_opt_set_bin(buffersink_ctx, "pix_fmts", - (uint8_t*)&enc_ctx->pix_fmt, sizeof(enc_ctx->pix_fmt), - AV_OPT_SEARCH_CHILDREN); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot set output pixel format\n"); - goto end; - } - } else if (dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { - buffersrc = avfilter_get_by_name("abuffer"); - buffersink = avfilter_get_by_name("abuffersink"); - if (!buffersrc || !buffersink) { - av_log(NULL, AV_LOG_ERROR, "filtering source or sink element not found\n"); - ret = AVERROR_UNKNOWN; - goto end; - } - - if (!dec_ctx->channel_layout) - dec_ctx->channel_layout = - av_get_default_channel_layout(dec_ctx->channels); - snprintf(args, sizeof(args), - "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64, - dec_ctx->time_base.num, dec_ctx->time_base.den, dec_ctx->sample_rate, - av_get_sample_fmt_name(dec_ctx->sample_fmt), - dec_ctx->channel_layout); - ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in", - args, NULL, filter_graph); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer source\n"); - goto end; - } - - ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out", - NULL, NULL, filter_graph); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n"); - goto end; - } - - ret = av_opt_set_bin(buffersink_ctx, "sample_fmts", - (uint8_t*)&enc_ctx->sample_fmt, sizeof(enc_ctx->sample_fmt), - AV_OPT_SEARCH_CHILDREN); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot set output sample format\n"); - goto end; - } - - ret = av_opt_set_bin(buffersink_ctx, "channel_layouts", - (uint8_t*)&enc_ctx->channel_layout, - sizeof(enc_ctx->channel_layout), AV_OPT_SEARCH_CHILDREN); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot set output channel layout\n"); - goto end; - } - - ret = av_opt_set_bin(buffersink_ctx, "sample_rates", - (uint8_t*)&enc_ctx->sample_rate, sizeof(enc_ctx->sample_rate), - AV_OPT_SEARCH_CHILDREN); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Cannot set output sample rate\n"); - goto end; - } - } else { - ret = AVERROR_UNKNOWN; - goto end; - } - - /* Endpoints for the filter graph. */ - outputs->name = av_strdup("in"); - outputs->filter_ctx = buffersrc_ctx; - outputs->pad_idx = 0; - outputs->next = NULL; - - inputs->name = av_strdup("out"); - inputs->filter_ctx = buffersink_ctx; - inputs->pad_idx = 0; - inputs->next = NULL; - - if (!outputs->name || !inputs->name) { - ret = AVERROR(ENOMEM); - goto end; - } - - if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_spec, - &inputs, &outputs, NULL)) < 0) - goto end; - - if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0) - goto end; - - /* Fill FilteringContext */ - fctx->buffersrc_ctx = buffersrc_ctx; - fctx->buffersink_ctx = buffersink_ctx; - fctx->filter_graph = filter_graph; - -end: - avfilter_inout_free(&inputs); - avfilter_inout_free(&outputs); - - return ret; -} - -static int init_filters(void) -{ - const char *filter_spec; - unsigned int i; - int ret; - filter_ctx = av_malloc_array(ifmt_ctx->nb_streams, sizeof(*filter_ctx)); - if (!filter_ctx) - return AVERROR(ENOMEM); - - for (i = 0; i < ifmt_ctx->nb_streams; i++) { - filter_ctx[i].buffersrc_ctx = NULL; - filter_ctx[i].buffersink_ctx = NULL; - filter_ctx[i].filter_graph = NULL; - if (!(ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO - || ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)) - continue; - - - if (ifmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) - filter_spec = "null"; /* passthrough (dummy) filter for video */ - else - filter_spec = "anull"; /* passthrough (dummy) filter for audio */ - ret = init_filter(&filter_ctx[i], ifmt_ctx->streams[i]->codec, - ofmt_ctx->streams[i]->codec, filter_spec); - if (ret) - return ret; - } - return 0; -} - -static int encode_write_frame(AVFrame *filt_frame, unsigned int stream_index, int *got_frame) { - int ret; - int got_frame_local; - AVPacket enc_pkt; - int (*enc_func)(AVCodecContext *, AVPacket *, const AVFrame *, int *) = - (ifmt_ctx->streams[stream_index]->codec->codec_type == - AVMEDIA_TYPE_VIDEO) ? avcodec_encode_video2 : avcodec_encode_audio2; - - if (!got_frame) - got_frame = &got_frame_local; - - av_log(NULL, AV_LOG_INFO, "Encoding frame\n"); - /* encode filtered frame */ - enc_pkt.data = NULL; - enc_pkt.size = 0; - av_init_packet(&enc_pkt); - ret = enc_func(ofmt_ctx->streams[stream_index]->codec, &enc_pkt, - filt_frame, got_frame); - av_frame_free(&filt_frame); - if (ret < 0) - return ret; - if (!(*got_frame)) - return 0; - - /* prepare packet for muxing */ - enc_pkt.stream_index = stream_index; - av_packet_rescale_ts(&enc_pkt, - ofmt_ctx->streams[stream_index]->codec->time_base, - ofmt_ctx->streams[stream_index]->time_base); - - av_log(NULL, AV_LOG_DEBUG, "Muxing frame\n"); - /* mux encoded frame */ - ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt); - return ret; -} - -static int filter_encode_write_frame(AVFrame *frame, unsigned int stream_index) -{ - int ret; - AVFrame *filt_frame; - - av_log(NULL, AV_LOG_INFO, "Pushing decoded frame to filters\n"); - /* push the decoded frame into the filtergraph */ - ret = av_buffersrc_add_frame_flags(filter_ctx[stream_index].buffersrc_ctx, - frame, 0); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Error while feeding the filtergraph\n"); - return ret; - } - - /* pull filtered frames from the filtergraph */ - while (1) { - filt_frame = av_frame_alloc(); - if (!filt_frame) { - ret = AVERROR(ENOMEM); - break; - } - av_log(NULL, AV_LOG_INFO, "Pulling filtered frame from filters\n"); - ret = av_buffersink_get_frame(filter_ctx[stream_index].buffersink_ctx, - filt_frame); - if (ret < 0) { - /* if no more frames for output - returns AVERROR(EAGAIN) - * if flushed and no more frames for output - returns AVERROR_EOF - * rewrite retcode to 0 to show it as normal procedure completion - */ - if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) - ret = 0; - av_frame_free(&filt_frame); - break; - } - - filt_frame->pict_type = AV_PICTURE_TYPE_NONE; - ret = encode_write_frame(filt_frame, stream_index, NULL); - if (ret < 0) - break; - } - - return ret; -} - -static int flush_encoder(unsigned int stream_index) -{ - int ret; - int got_frame; - - if (!(ofmt_ctx->streams[stream_index]->codec->codec->capabilities & - AV_CODEC_CAP_DELAY)) - return 0; - - while (1) { - av_log(NULL, AV_LOG_INFO, "Flushing stream #%u encoder\n", stream_index); - ret = encode_write_frame(NULL, stream_index, &got_frame); - if (ret < 0) - break; - if (!got_frame) - return 0; - } - return ret; -} - -int main(int argc, char **argv) -{ - int ret; - AVPacket packet = { .data = NULL, .size = 0 }; - AVFrame *frame = NULL; - enum AVMediaType type; - unsigned int stream_index; - unsigned int i; - int got_frame; - int (*dec_func)(AVCodecContext *, AVFrame *, int *, const AVPacket *); - - if (argc != 3) { - av_log(NULL, AV_LOG_ERROR, "Usage: %s \n", argv[0]); - return 1; - } - - av_register_all(); - avfilter_register_all(); - - if ((ret = open_input_file(argv[1])) < 0) - goto end; - if ((ret = open_output_file(argv[2])) < 0) - goto end; - if ((ret = init_filters()) < 0) - goto end; - - /* read all packets */ - while (1) { - if ((ret = av_read_frame(ifmt_ctx, &packet)) < 0) - break; - stream_index = packet.stream_index; - type = ifmt_ctx->streams[packet.stream_index]->codec->codec_type; - av_log(NULL, AV_LOG_DEBUG, "Demuxer gave frame of stream_index %u\n", - stream_index); - - if (filter_ctx[stream_index].filter_graph) { - av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter the frame\n"); - frame = av_frame_alloc(); - if (!frame) { - ret = AVERROR(ENOMEM); - break; - } - av_packet_rescale_ts(&packet, - ifmt_ctx->streams[stream_index]->time_base, - ifmt_ctx->streams[stream_index]->codec->time_base); - dec_func = (type == AVMEDIA_TYPE_VIDEO) ? avcodec_decode_video2 : - avcodec_decode_audio4; - ret = dec_func(ifmt_ctx->streams[stream_index]->codec, frame, - &got_frame, &packet); - if (ret < 0) { - av_frame_free(&frame); - av_log(NULL, AV_LOG_ERROR, "Decoding failed\n"); - break; - } - - if (got_frame) { - frame->pts = av_frame_get_best_effort_timestamp(frame); - ret = filter_encode_write_frame(frame, stream_index); - av_frame_free(&frame); - if (ret < 0) - goto end; - } else { - av_frame_free(&frame); - } - } else { - /* remux this frame without reencoding */ - av_packet_rescale_ts(&packet, - ifmt_ctx->streams[stream_index]->time_base, - ofmt_ctx->streams[stream_index]->time_base); - - ret = av_interleaved_write_frame(ofmt_ctx, &packet); - if (ret < 0) - goto end; - } - av_packet_unref(&packet); - } - - /* flush filters and encoders */ - for (i = 0; i < ifmt_ctx->nb_streams; i++) { - /* flush filter */ - if (!filter_ctx[i].filter_graph) - continue; - ret = filter_encode_write_frame(NULL, i); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Flushing filter failed\n"); - goto end; - } - - /* flush encoder */ - ret = flush_encoder(i); - if (ret < 0) { - av_log(NULL, AV_LOG_ERROR, "Flushing encoder failed\n"); - goto end; - } - } - - av_write_trailer(ofmt_ctx); -end: - av_packet_unref(&packet); - av_frame_free(&frame); - for (i = 0; i < ifmt_ctx->nb_streams; i++) { - avcodec_close(ifmt_ctx->streams[i]->codec); - if (ofmt_ctx && ofmt_ctx->nb_streams > i && ofmt_ctx->streams[i] && ofmt_ctx->streams[i]->codec) - avcodec_close(ofmt_ctx->streams[i]->codec); - if (filter_ctx && filter_ctx[i].filter_graph) - avfilter_graph_free(&filter_ctx[i].filter_graph); - } - av_free(filter_ctx); - avformat_close_input(&ifmt_ctx); - if (ofmt_ctx && !(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) - avio_closep(&ofmt_ctx->pb); - avformat_free_context(ofmt_ctx); - - if (ret < 0) - av_log(NULL, AV_LOG_ERROR, "Error occurred: %s\n", av_err2str(ret)); - - return ret ? 1 : 0; -} -- cgit v1.2.3