| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "libavutil/avassert.h" |
| #include "libavdevice/avdevice.h" |
| #include "libavfilter/avfilter.h" |
| #include "libavfilter/buffersink.h" |
| #include "libavformat/avformat.h" |
| |
| typedef struct { |
| AVFormatContext *mux; |
| AVStream *stream; |
| AVFilterContext *sink; |
| } Stream; |
| |
| static int create_sink(Stream *st, AVFilterGraph *graph, |
| AVFilterContext *f, int idx) |
| { |
| enum AVMediaType type = avfilter_pad_get_type(f->output_pads, idx); |
| const char *sink_name; |
| int ret; |
| |
| switch (type) { |
| case AVMEDIA_TYPE_VIDEO: sink_name = "buffersink"; break; |
| case AVMEDIA_TYPE_AUDIO: sink_name = "abuffersink"; break; |
| default: |
| av_log(NULL, AV_LOG_ERROR, "Stream type not supported\n"); |
| return AVERROR(EINVAL); |
| } |
| ret = avfilter_graph_create_filter(&st->sink, |
| avfilter_get_by_name(sink_name), |
| NULL, NULL, NULL, graph); |
| if (ret < 0) |
| return ret; |
| ret = avfilter_link(f, idx, st->sink, 0); |
| if (ret < 0) |
| return ret; |
| return 0; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| char *in_graph_desc, **out_dev_name; |
| int nb_out_dev = 0, nb_streams = 0; |
| AVFilterGraph *in_graph = NULL; |
| Stream *streams = NULL, *st; |
| AVFrame *frame = NULL; |
| int i, j, run = 1, ret; |
| |
| //av_log_set_level(AV_LOG_DEBUG); |
| |
| if (argc < 3) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Usage: %s filter_graph dev:out [dev2:out2...]\n\n" |
| "Examples:\n" |
| "%s movie=file.nut:s=v+a xv:- alsa:default\n" |
| "%s movie=file.nut:s=v+a uncodedframecrc:pipe:0\n", |
| argv[0], argv[0], argv[0]); |
| exit(1); |
| } |
| in_graph_desc = argv[1]; |
| out_dev_name = argv + 2; |
| nb_out_dev = argc - 2; |
| |
| avdevice_register_all(); |
| |
| /* Create input graph */ |
| if (!(in_graph = avfilter_graph_alloc())) { |
| ret = AVERROR(ENOMEM); |
| av_log(NULL, AV_LOG_ERROR, "Unable to alloc graph graph: %s\n", |
| av_err2str(ret)); |
| goto fail; |
| } |
| ret = avfilter_graph_parse_ptr(in_graph, in_graph_desc, NULL, NULL, NULL); |
| if (ret < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Unable to parse graph: %s\n", |
| av_err2str(ret)); |
| goto fail; |
| } |
| nb_streams = 0; |
| for (i = 0; i < in_graph->nb_filters; i++) { |
| AVFilterContext *f = in_graph->filters[i]; |
| for (j = 0; j < f->nb_inputs; j++) { |
| if (!f->inputs[j]) { |
| av_log(NULL, AV_LOG_ERROR, "Graph has unconnected inputs\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| } |
| for (j = 0; j < f->nb_outputs; j++) |
| if (!f->outputs[j]) |
| nb_streams++; |
| } |
| if (!nb_streams) { |
| av_log(NULL, AV_LOG_ERROR, "Graph has no output stream\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| if (nb_out_dev != 1 && nb_out_dev != nb_streams) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Graph has %d output streams, %d devices given\n", |
| nb_streams, nb_out_dev); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| |
| if (!(streams = av_calloc(nb_streams, sizeof(*streams)))) { |
| ret = AVERROR(ENOMEM); |
| av_log(NULL, AV_LOG_ERROR, "Could not allocate streams\n"); |
| } |
| st = streams; |
| for (i = 0; i < in_graph->nb_filters; i++) { |
| AVFilterContext *f = in_graph->filters[i]; |
| for (j = 0; j < f->nb_outputs; j++) { |
| if (!f->outputs[j]) { |
| if ((ret = create_sink(st++, in_graph, f, j)) < 0) |
| goto fail; |
| } |
| } |
| } |
| av_assert0(st - streams == nb_streams); |
| if ((ret = avfilter_graph_config(in_graph, NULL)) < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Failed to configure graph\n"); |
| goto fail; |
| } |
| |
| /* Create output devices */ |
| for (i = 0; i < nb_out_dev; i++) { |
| char *fmt = NULL, *dev = out_dev_name[i]; |
| st = &streams[i]; |
| if ((dev = strchr(dev, ':'))) { |
| *(dev++) = 0; |
| fmt = out_dev_name[i]; |
| } |
| ret = avformat_alloc_output_context2(&st->mux, NULL, fmt, dev); |
| if (ret < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Failed to allocate output: %s\n", |
| av_err2str(ret)); |
| goto fail; |
| } |
| if (!(st->mux->oformat->flags & AVFMT_NOFILE)) { |
| ret = avio_open2(&st->mux->pb, st->mux->url, AVIO_FLAG_WRITE, |
| NULL, NULL); |
| if (ret < 0) { |
| av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n", |
| av_err2str(ret)); |
| goto fail; |
| } |
| } |
| } |
| for (; i < nb_streams; i++) |
| streams[i].mux = streams[0].mux; |
| |
| /* Create output device streams */ |
| for (i = 0; i < nb_streams; i++) { |
| st = &streams[i]; |
| if (!(st->stream = avformat_new_stream(st->mux, NULL))) { |
| ret = AVERROR(ENOMEM); |
| av_log(NULL, AV_LOG_ERROR, "Failed to create output stream\n"); |
| goto fail; |
| } |
| st->stream->codecpar->codec_type = av_buffersink_get_type(st->sink); |
| st->stream->time_base = av_buffersink_get_time_base(st->sink); |
| switch (av_buffersink_get_type(st->sink)) { |
| case AVMEDIA_TYPE_VIDEO: |
| st->stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO; |
| st->stream->avg_frame_rate = |
| st->stream-> r_frame_rate = av_buffersink_get_frame_rate(st->sink); |
| st->stream->codecpar->width = av_buffersink_get_w(st->sink); |
| st->stream->codecpar->height = av_buffersink_get_h(st->sink); |
| st->stream->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(st->sink); |
| st->stream->codecpar->format = av_buffersink_get_format(st->sink); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| st->stream->codecpar->channel_layout = av_buffersink_get_channel_layout(st->sink); |
| st->stream->codecpar->channels = av_buffersink_get_channels(st->sink); |
| st->stream->codecpar->sample_rate = av_buffersink_get_sample_rate(st->sink); |
| st->stream->codecpar->format = av_buffersink_get_format(st->sink); |
| st->stream->codecpar->codec_id = av_get_pcm_codec(st->stream->codecpar->format, -1); |
| break; |
| default: |
| av_assert0(!"reached"); |
| } |
| } |
| |
| /* Init output devices */ |
| for (i = 0; i < nb_out_dev; i++) { |
| st = &streams[i]; |
| if ((ret = avformat_write_header(st->mux, NULL)) < 0) { |
| av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n", |
| av_err2str(ret)); |
| goto fail; |
| } |
| } |
| |
| /* Check output devices */ |
| for (i = 0; i < nb_streams; i++) { |
| st = &streams[i]; |
| ret = av_write_uncoded_frame_query(st->mux, st->stream->index); |
| if (ret < 0) { |
| av_log(st->mux, AV_LOG_ERROR, |
| "Uncoded frames not supported on stream #%d: %s\n", |
| i, av_err2str(ret)); |
| goto fail; |
| } |
| } |
| |
| while (run) { |
| ret = avfilter_graph_request_oldest(in_graph); |
| if (ret < 0) { |
| if (ret == AVERROR_EOF) { |
| run = 0; |
| } else { |
| av_log(NULL, AV_LOG_ERROR, "Error filtering: %s\n", |
| av_err2str(ret)); |
| break; |
| } |
| } |
| for (i = 0; i < nb_streams; i++) { |
| st = &streams[i]; |
| while (1) { |
| if (!frame && !(frame = av_frame_alloc())) { |
| ret = AVERROR(ENOMEM); |
| av_log(NULL, AV_LOG_ERROR, "Could not allocate frame\n"); |
| goto fail; |
| } |
| ret = av_buffersink_get_frame_flags(st->sink, frame, |
| AV_BUFFERSINK_FLAG_NO_REQUEST); |
| if (ret < 0) { |
| if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) |
| av_log(NULL, AV_LOG_WARNING, "Error in sink: %s\n", |
| av_err2str(ret)); |
| break; |
| } |
| if (frame->pts != AV_NOPTS_VALUE) |
| frame->pts = av_rescale_q(frame->pts, |
| av_buffersink_get_time_base(st->sink), |
| st->stream->time_base); |
| ret = av_interleaved_write_uncoded_frame(st->mux, |
| st->stream->index, |
| frame); |
| frame = NULL; |
| if (ret < 0) { |
| av_log(st->mux, AV_LOG_ERROR, |
| "Error writing frame: %s\n", av_err2str(ret)); |
| goto fail; |
| } |
| } |
| } |
| } |
| ret = 0; |
| |
| for (i = 0; i < nb_out_dev; i++) { |
| st = &streams[i]; |
| av_write_trailer(st->mux); |
| } |
| |
| fail: |
| av_frame_free(&frame); |
| avfilter_graph_free(&in_graph); |
| if (streams) { |
| for (i = 0; i < nb_out_dev; i++) { |
| st = &streams[i]; |
| if (st->mux) { |
| if (st->mux->pb) |
| avio_closep(&st->mux->pb); |
| avformat_free_context(st->mux); |
| } |
| } |
| } |
| av_freep(&streams); |
| return ret < 0; |
| } |
