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- #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;
- AVFilterLink *link;
- } 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;
- st->link = st->sink->inputs[0];
- 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;
- av_register_all();
- avdevice_register_all();
- avfilter_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->filename, 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->codec->codec_type = st->link->type;
- st->stream->time_base = st->stream->codec->time_base =
- st->link->time_base;
- switch (st->link->type) {
- case AVMEDIA_TYPE_VIDEO:
- st->stream->codec->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->codec->width = st->link->w;
- st->stream->codec->height = st->link->h;
- st->stream->codec->sample_aspect_ratio = st->link->sample_aspect_ratio;
- st->stream->codec->pix_fmt = st->link->format;
- break;
- case AVMEDIA_TYPE_AUDIO:
- st->stream->codec->channel_layout = st->link->channel_layout;
- st->stream->codec->channels = avfilter_link_get_channels(st->link);
- st->stream->codec->sample_rate = st->link->sample_rate;
- st->stream->codec->sample_fmt = st->link->format;
- st->stream->codec->codec_id =
- av_get_pcm_codec(st->stream->codec->sample_fmt, -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,
- st->link ->time_base,
- st->stream->time_base);
- ret = av_interleaved_write_uncoded_frame(st->mux,
- st->stream->index,
- frame);
- frame = NULL;
- if (ret < 0) {
- av_log(st->stream->codec, 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;
- }
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