git.sesse.net Git - ffmpeg/blob - tools/uncoded_frame.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include "libavutil/avassert.h"
   5 #include "libavdevice/avdevice.h"
   6 #include "libavfilter/avfilter.h"
   7 #include "libavfilter/buffersink.h"
   8 #include "libavformat/avformat.h"
   9
  10 typedef struct {
  11     AVFormatContext *mux;
  12     AVStream *stream;
  13     AVFilterContext *sink;
  14 } Stream;
  15
  16 static int create_sink(Stream *st, AVFilterGraph *graph,
  17                        AVFilterContext *f, int idx)
  18 {
  19     enum AVMediaType type = avfilter_pad_get_type(f->output_pads, idx);
  20     const char *sink_name;
  21     int ret;
  22
  23     switch (type) {
  24     case AVMEDIA_TYPE_VIDEO: sink_name =  "buffersink"; break;
  25     case AVMEDIA_TYPE_AUDIO: sink_name = "abuffersink"; break;
  26     default:
  27         av_log(NULL, AV_LOG_ERROR, "Stream type not supported\n");
  28         return AVERROR(EINVAL);
  29     }
  30     ret = avfilter_graph_create_filter(&st->sink,
  31                                        avfilter_get_by_name(sink_name),
  32                                        NULL, NULL, NULL, graph);
  33     if (ret < 0)
  34         return ret;
  35     ret = avfilter_link(f, idx, st->sink, 0);
  36     if (ret < 0)
  37         return ret;
  38     return 0;
  39 }
  40
  41 int main(int argc, char **argv)
  42 {
  43     char *in_graph_desc, **out_dev_name;
  44     int nb_out_dev = 0, nb_streams = 0;
  45     AVFilterGraph *in_graph = NULL;
  46     Stream *streams = NULL, *st;
  47     AVFrame *frame = NULL;
  48     int i, j, run = 1, ret;
  49
  50     //av_log_set_level(AV_LOG_DEBUG);
  51
  52     if (argc < 3) {
  53         av_log(NULL, AV_LOG_ERROR,
  54                "Usage: %s filter_graph dev:out [dev2:out2...]\n\n"
  55                "Examples:\n"
  56                "%s movie=file.nut:s=v+a xv:- alsa:default\n"
  57                "%s movie=file.nut:s=v+a uncodedframecrc:pipe:0\n",
  58                argv[0], argv[0], argv[0]);
  59         exit(1);
  60     }
  61     in_graph_desc = argv[1];
  62     out_dev_name = argv + 2;
  63     nb_out_dev = argc - 2;
  64
  65     avdevice_register_all();
  66
  67     /* Create input graph */
  68     if (!(in_graph = avfilter_graph_alloc())) {
  69         ret = AVERROR(ENOMEM);
  70         av_log(NULL, AV_LOG_ERROR, "Unable to alloc graph graph: %s\n",
  71                av_err2str(ret));
  72         goto fail;
  73     }
  74     ret = avfilter_graph_parse_ptr(in_graph, in_graph_desc, NULL, NULL, NULL);
  75     if (ret < 0) {
  76         av_log(NULL, AV_LOG_ERROR, "Unable to parse graph: %s\n",
  77                av_err2str(ret));
  78         goto fail;
  79     }
  80     nb_streams = 0;
  81     for (i = 0; i < in_graph->nb_filters; i++) {
  82         AVFilterContext *f = in_graph->filters[i];
  83         for (j = 0; j < f->nb_inputs; j++) {
  84             if (!f->inputs[j]) {
  85                 av_log(NULL, AV_LOG_ERROR, "Graph has unconnected inputs\n");
  86                 ret = AVERROR(EINVAL);
  87                 goto fail;
  88             }
  89         }
  90         for (j = 0; j < f->nb_outputs; j++)
  91             if (!f->outputs[j])
  92                 nb_streams++;
  93     }
  94     if (!nb_streams) {
  95         av_log(NULL, AV_LOG_ERROR, "Graph has no output stream\n");
  96         ret = AVERROR(EINVAL);
  97         goto fail;
  98     }
  99     if (nb_out_dev != 1 && nb_out_dev != nb_streams) {
 100         av_log(NULL, AV_LOG_ERROR,
 101                "Graph has %d output streams, %d devices given\n",
 102                nb_streams, nb_out_dev);
 103         ret = AVERROR(EINVAL);
 104         goto fail;
 105     }
 106
 107     if (!(streams = av_calloc(nb_streams, sizeof(*streams)))) {
 108         ret = AVERROR(ENOMEM);
 109         av_log(NULL, AV_LOG_ERROR, "Could not allocate streams\n");
 110     }
 111     st = streams;
 112     for (i = 0; i < in_graph->nb_filters; i++) {
 113         AVFilterContext *f = in_graph->filters[i];
 114         for (j = 0; j < f->nb_outputs; j++) {
 115             if (!f->outputs[j]) {
 116                 if ((ret = create_sink(st++, in_graph, f, j)) < 0)
 117                     goto fail;
 118             }
 119         }
 120     }
 121     av_assert0(st - streams == nb_streams);
 122     if ((ret = avfilter_graph_config(in_graph, NULL)) < 0) {
 123         av_log(NULL, AV_LOG_ERROR, "Failed to configure graph\n");
 124         goto fail;
 125     }
 126
 127     /* Create output devices */
 128     for (i = 0; i < nb_out_dev; i++) {
 129         char *fmt = NULL, *dev = out_dev_name[i];
 130         st = &streams[i];
 131         if ((dev = strchr(dev, ':'))) {
 132             *(dev++) = 0;
 133             fmt = out_dev_name[i];
 134         }
 135         ret = avformat_alloc_output_context2(&st->mux, NULL, fmt, dev);
 136         if (ret < 0) {
 137             av_log(NULL, AV_LOG_ERROR, "Failed to allocate output: %s\n",
 138                    av_err2str(ret));
 139             goto fail;
 140         }
 141         if (!(st->mux->oformat->flags & AVFMT_NOFILE)) {
 142             ret = avio_open2(&st->mux->pb, st->mux->url, AVIO_FLAG_WRITE,
 143                              NULL, NULL);
 144             if (ret < 0) {
 145                 av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
 146                        av_err2str(ret));
 147                 goto fail;
 148             }
 149         }
 150     }
 151     for (; i < nb_streams; i++)
 152         streams[i].mux = streams[0].mux;
 153
 154     /* Create output device streams */
 155     for (i = 0; i < nb_streams; i++) {
 156         st = &streams[i];
 157         if (!(st->stream = avformat_new_stream(st->mux, NULL))) {
 158             ret = AVERROR(ENOMEM);
 159             av_log(NULL, AV_LOG_ERROR, "Failed to create output stream\n");
 160             goto fail;
 161         }
 162         st->stream->codecpar->codec_type = av_buffersink_get_type(st->sink);
 163         st->stream->time_base = av_buffersink_get_time_base(st->sink);
 164         switch (av_buffersink_get_type(st->sink)) {
 165         case AVMEDIA_TYPE_VIDEO:
 166             st->stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
 167             st->stream->avg_frame_rate =
 168             st->stream->  r_frame_rate = av_buffersink_get_frame_rate(st->sink);
 169             st->stream->codecpar->width               = av_buffersink_get_w(st->sink);
 170             st->stream->codecpar->height              = av_buffersink_get_h(st->sink);
 171             st->stream->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(st->sink);
 172             st->stream->codecpar->format              = av_buffersink_get_format(st->sink);
 173             break;
 174         case AVMEDIA_TYPE_AUDIO:
 175             st->stream->codecpar->channel_layout = av_buffersink_get_channel_layout(st->sink);
 176             st->stream->codecpar->channels       = av_buffersink_get_channels(st->sink);
 177             st->stream->codecpar->sample_rate    = av_buffersink_get_sample_rate(st->sink);
 178             st->stream->codecpar->format         = av_buffersink_get_format(st->sink);
 179             st->stream->codecpar->codec_id       = av_get_pcm_codec(st->stream->codecpar->format, -1);
 180             break;
 181         default:
 182             av_assert0(!"reached");
 183         }
 184     }
 185
 186     /* Init output devices */
 187     for (i = 0; i < nb_out_dev; i++) {
 188         st = &streams[i];
 189         if ((ret = avformat_write_header(st->mux, NULL)) < 0) {
 190             av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
 191                    av_err2str(ret));
 192             goto fail;
 193         }
 194     }
 195
 196     /* Check output devices */
 197     for (i = 0; i < nb_streams; i++) {
 198         st = &streams[i];
 199         ret = av_write_uncoded_frame_query(st->mux, st->stream->index);
 200         if (ret < 0) {
 201             av_log(st->mux, AV_LOG_ERROR,
 202                    "Uncoded frames not supported on stream #%d: %s\n",
 203                    i, av_err2str(ret));
 204             goto fail;
 205         }
 206     }
 207
 208     while (run) {
 209         ret = avfilter_graph_request_oldest(in_graph);
 210         if (ret < 0) {
 211             if (ret == AVERROR_EOF) {
 212                 run = 0;
 213             } else {
 214                 av_log(NULL, AV_LOG_ERROR, "Error filtering: %s\n",
 215                        av_err2str(ret));
 216                 break;
 217             }
 218         }
 219         for (i = 0; i < nb_streams; i++) {
 220             st = &streams[i];
 221             while (1) {
 222                 if (!frame && !(frame = av_frame_alloc())) {
 223                     ret = AVERROR(ENOMEM);
 224                     av_log(NULL, AV_LOG_ERROR, "Could not allocate frame\n");
 225                     goto fail;
 226                 }
 227                 ret = av_buffersink_get_frame_flags(st->sink, frame,
 228                                                     AV_BUFFERSINK_FLAG_NO_REQUEST);
 229                 if (ret < 0) {
 230                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
 231                         av_log(NULL, AV_LOG_WARNING, "Error in sink: %s\n",
 232                                av_err2str(ret));
 233                     break;
 234                 }
 235                 if (frame->pts != AV_NOPTS_VALUE)
 236                     frame->pts = av_rescale_q(frame->pts,
 237                                               av_buffersink_get_time_base(st->sink),
 238                                               st->stream->time_base);
 239                 ret = av_interleaved_write_uncoded_frame(st->mux,
 240                                                          st->stream->index,
 241                                                          frame);
 242                 frame = NULL;
 243                 if (ret < 0) {
 244                     av_log(st->mux, AV_LOG_ERROR,
 245                            "Error writing frame: %s\n", av_err2str(ret));
 246                     goto fail;
 247                 }
 248             }
 249         }
 250     }
 251     ret = 0;
 252
 253     for (i = 0; i < nb_out_dev; i++) {
 254         st = &streams[i];
 255         av_write_trailer(st->mux);
 256     }
 257
 258 fail:
 259     av_frame_free(&frame);
 260     avfilter_graph_free(&in_graph);
 261     if (streams) {
 262         for (i = 0; i < nb_out_dev; i++) {
 263             st = &streams[i];
 264             if (st->mux) {
 265                 if (st->mux->pb)
 266                     avio_closep(&st->mux->pb);
 267                 avformat_free_context(st->mux);
 268             }
 269         }
 270     }
 271     av_freep(&streams);
 272     return ret < 0;
 273 }