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 #include "libavcodec/codec_id.h"
  10
  11 typedef struct {
  12     AVFormatContext *mux;
  13     AVStream *stream;
  14     AVFilterContext *sink;
  15 } Stream;
  16
  17 static int create_sink(Stream *st, AVFilterGraph *graph,
  18                        AVFilterContext *f, int idx)
  19 {
  20     enum AVMediaType type = avfilter_pad_get_type(f->output_pads, idx);
  21     const char *sink_name;
  22     int ret;
  23
  24     switch (type) {
  25     case AVMEDIA_TYPE_VIDEO: sink_name =  "buffersink"; break;
  26     case AVMEDIA_TYPE_AUDIO: sink_name = "abuffersink"; break;
  27     default:
  28         av_log(NULL, AV_LOG_ERROR, "Stream type not supported\n");
  29         return AVERROR(EINVAL);
  30     }
  31     ret = avfilter_graph_create_filter(&st->sink,
  32                                        avfilter_get_by_name(sink_name),
  33                                        NULL, NULL, NULL, graph);
  34     if (ret < 0)
  35         return ret;
  36     ret = avfilter_link(f, idx, st->sink, 0);
  37     if (ret < 0)
  38         return ret;
  39     return 0;
  40 }
  41
  42 int main(int argc, char **argv)
  43 {
  44     char *in_graph_desc, **out_dev_name;
  45     int nb_out_dev = 0, nb_streams = 0;
  46     AVFilterGraph *in_graph = NULL;
  47     Stream *streams = NULL, *st;
  48     AVFrame *frame = NULL;
  49     int i, j, run = 1, ret;
  50
  51     //av_log_set_level(AV_LOG_DEBUG);
  52
  53     if (argc < 3) {
  54         av_log(NULL, AV_LOG_ERROR,
  55                "Usage: %s filter_graph dev:out [dev2:out2...]\n\n"
  56                "Examples:\n"
  57                "%s movie=file.nut:s=v+a xv:- alsa:default\n"
  58                "%s movie=file.nut:s=v+a uncodedframecrc:pipe:0\n",
  59                argv[0], argv[0], argv[0]);
  60         exit(1);
  61     }
  62     in_graph_desc = argv[1];
  63     out_dev_name = argv + 2;
  64     nb_out_dev = argc - 2;
  65
  66     avdevice_register_all();
  67
  68     /* Create input graph */
  69     if (!(in_graph = avfilter_graph_alloc())) {
  70         ret = AVERROR(ENOMEM);
  71         av_log(NULL, AV_LOG_ERROR, "Unable to alloc graph graph: %s\n",
  72                av_err2str(ret));
  73         goto fail;
  74     }
  75     ret = avfilter_graph_parse_ptr(in_graph, in_graph_desc, NULL, NULL, NULL);
  76     if (ret < 0) {
  77         av_log(NULL, AV_LOG_ERROR, "Unable to parse graph: %s\n",
  78                av_err2str(ret));
  79         goto fail;
  80     }
  81     nb_streams = 0;
  82     for (i = 0; i < in_graph->nb_filters; i++) {
  83         AVFilterContext *f = in_graph->filters[i];
  84         for (j = 0; j < f->nb_inputs; j++) {
  85             if (!f->inputs[j]) {
  86                 av_log(NULL, AV_LOG_ERROR, "Graph has unconnected inputs\n");
  87                 ret = AVERROR(EINVAL);
  88                 goto fail;
  89             }
  90         }
  91         for (j = 0; j < f->nb_outputs; j++)
  92             if (!f->outputs[j])
  93                 nb_streams++;
  94     }
  95     if (!nb_streams) {
  96         av_log(NULL, AV_LOG_ERROR, "Graph has no output stream\n");
  97         ret = AVERROR(EINVAL);
  98         goto fail;
  99     }
 100     if (nb_out_dev != 1 && nb_out_dev != nb_streams) {
 101         av_log(NULL, AV_LOG_ERROR,
 102                "Graph has %d output streams, %d devices given\n",
 103                nb_streams, nb_out_dev);
 104         ret = AVERROR(EINVAL);
 105         goto fail;
 106     }
 107
 108     if (!(streams = av_calloc(nb_streams, sizeof(*streams)))) {
 109         ret = AVERROR(ENOMEM);
 110         av_log(NULL, AV_LOG_ERROR, "Could not allocate streams\n");
 111     }
 112     st = streams;
 113     for (i = 0; i < in_graph->nb_filters; i++) {
 114         AVFilterContext *f = in_graph->filters[i];
 115         for (j = 0; j < f->nb_outputs; j++) {
 116             if (!f->outputs[j]) {
 117                 if ((ret = create_sink(st++, in_graph, f, j)) < 0)
 118                     goto fail;
 119             }
 120         }
 121     }
 122     av_assert0(st - streams == nb_streams);
 123     if ((ret = avfilter_graph_config(in_graph, NULL)) < 0) {
 124         av_log(NULL, AV_LOG_ERROR, "Failed to configure graph\n");
 125         goto fail;
 126     }
 127
 128     /* Create output devices */
 129     for (i = 0; i < nb_out_dev; i++) {
 130         char *fmt = NULL, *dev = out_dev_name[i];
 131         st = &streams[i];
 132         if ((dev = strchr(dev, ':'))) {
 133             *(dev++) = 0;
 134             fmt = out_dev_name[i];
 135         }
 136         ret = avformat_alloc_output_context2(&st->mux, NULL, fmt, dev);
 137         if (ret < 0) {
 138             av_log(NULL, AV_LOG_ERROR, "Failed to allocate output: %s\n",
 139                    av_err2str(ret));
 140             goto fail;
 141         }
 142         if (!(st->mux->oformat->flags & AVFMT_NOFILE)) {
 143             ret = avio_open2(&st->mux->pb, st->mux->url, AVIO_FLAG_WRITE,
 144                              NULL, NULL);
 145             if (ret < 0) {
 146                 av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
 147                        av_err2str(ret));
 148                 goto fail;
 149             }
 150         }
 151     }
 152     for (; i < nb_streams; i++)
 153         streams[i].mux = streams[0].mux;
 154
 155     /* Create output device streams */
 156     for (i = 0; i < nb_streams; i++) {
 157         st = &streams[i];
 158         if (!(st->stream = avformat_new_stream(st->mux, NULL))) {
 159             ret = AVERROR(ENOMEM);
 160             av_log(NULL, AV_LOG_ERROR, "Failed to create output stream\n");
 161             goto fail;
 162         }
 163         st->stream->codecpar->codec_type = av_buffersink_get_type(st->sink);
 164         st->stream->time_base = av_buffersink_get_time_base(st->sink);
 165         switch (av_buffersink_get_type(st->sink)) {
 166         case AVMEDIA_TYPE_VIDEO:
 167             st->stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
 168             st->stream->avg_frame_rate =
 169             st->stream->  r_frame_rate = av_buffersink_get_frame_rate(st->sink);
 170             st->stream->codecpar->width               = av_buffersink_get_w(st->sink);
 171             st->stream->codecpar->height              = av_buffersink_get_h(st->sink);
 172             st->stream->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(st->sink);
 173             st->stream->codecpar->format              = av_buffersink_get_format(st->sink);
 174             break;
 175         case AVMEDIA_TYPE_AUDIO:
 176             ret = av_buffersink_get_ch_layout(st->sink, &st->stream->codecpar->ch_layout);
 177             if (ret < 0)
 178                 goto fail;
 179             st->stream->codecpar->sample_rate    = av_buffersink_get_sample_rate(st->sink);
 180             st->stream->codecpar->format         = av_buffersink_get_format(st->sink);
 181             st->stream->codecpar->codec_id       = av_get_pcm_codec(st->stream->codecpar->format, -1);
 182             break;
 183         default:
 184             av_assert0(!"reached");
 185         }
 186     }
 187
 188     /* Init output devices */
 189     for (i = 0; i < nb_out_dev; i++) {
 190         st = &streams[i];
 191         if ((ret = avformat_write_header(st->mux, NULL)) < 0) {
 192             av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
 193                    av_err2str(ret));
 194             goto fail;
 195         }
 196     }
 197
 198     /* Check output devices */
 199     for (i = 0; i < nb_streams; i++) {
 200         st = &streams[i];
 201         ret = av_write_uncoded_frame_query(st->mux, st->stream->index);
 202         if (ret < 0) {
 203             av_log(st->mux, AV_LOG_ERROR,
 204                    "Uncoded frames not supported on stream #%d: %s\n",
 205                    i, av_err2str(ret));
 206             goto fail;
 207         }
 208     }
 209
 210     while (run) {
 211         ret = avfilter_graph_request_oldest(in_graph);
 212         if (ret < 0) {
 213             if (ret == AVERROR_EOF) {
 214                 run = 0;
 215             } else {
 216                 av_log(NULL, AV_LOG_ERROR, "Error filtering: %s\n",
 217                        av_err2str(ret));
 218                 break;
 219             }
 220         }
 221         for (i = 0; i < nb_streams; i++) {
 222             st = &streams[i];
 223             while (1) {
 224                 if (!frame && !(frame = av_frame_alloc())) {
 225                     ret = AVERROR(ENOMEM);
 226                     av_log(NULL, AV_LOG_ERROR, "Could not allocate frame\n");
 227                     goto fail;
 228                 }
 229                 ret = av_buffersink_get_frame_flags(st->sink, frame,
 230                                                     AV_BUFFERSINK_FLAG_NO_REQUEST);
 231                 if (ret < 0) {
 232                     if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
 233                         av_log(NULL, AV_LOG_WARNING, "Error in sink: %s\n",
 234                                av_err2str(ret));
 235                     break;
 236                 }
 237                 if (frame->pts != AV_NOPTS_VALUE)
 238                     frame->pts = av_rescale_q(frame->pts,
 239                                               av_buffersink_get_time_base(st->sink),
 240                                               st->stream->time_base);
 241                 ret = av_interleaved_write_uncoded_frame(st->mux,
 242                                                          st->stream->index,
 243                                                          frame);
 244                 frame = NULL;
 245                 if (ret < 0) {
 246                     av_log(st->mux, AV_LOG_ERROR,
 247                            "Error writing frame: %s\n", av_err2str(ret));
 248                     goto fail;
 249                 }
 250             }
 251         }
 252     }
 253     ret = 0;
 254
 255     for (i = 0; i < nb_out_dev; i++) {
 256         st = &streams[i];
 257         av_write_trailer(st->mux);
 258     }
 259
 260 fail:
 261     av_frame_free(&frame);
 262     avfilter_graph_free(&in_graph);
 263     if (streams) {
 264         for (i = 0; i < nb_out_dev; i++) {
 265             st = &streams[i];
 266             if (st->mux) {
 267                 if (st->mux->pb)
 268                     avio_closep(&st->mux->pb);
 269                 avformat_free_context(st->mux);
 270             }
 271         }
 272     }
 273     av_freep(&streams);
 274     return ret < 0;
 275 }