| 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 | AVFilterLink *link; |
| 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 | st->link = st->sink->inputs[0]; |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | int main(int argc, char **argv) |
| 44 | { |
| 45 | char *in_graph_desc, **out_dev_name; |
| 46 | int nb_out_dev = 0, nb_streams = 0; |
| 47 | AVFilterGraph *in_graph = NULL; |
| 48 | Stream *streams = NULL, *st; |
| 49 | AVFrame *frame = NULL; |
| 50 | int i, j, run = 1, ret; |
| 51 | |
| 52 | //av_log_set_level(AV_LOG_DEBUG); |
| 53 | |
| 54 | if (argc < 3) { |
| 55 | av_log(NULL, AV_LOG_ERROR, |
| 56 | "Usage: %s filter_graph dev:out [dev2:out2...]\n\n" |
| 57 | "Examples:\n" |
| 58 | "%s movie=file.nut:s=v+a xv:- alsa:default\n" |
| 59 | "%s movie=file.nut:s=v+a uncodedframecrc:pipe:0\n", |
| 60 | argv[0], argv[0], argv[0]); |
| 61 | exit(1); |
| 62 | } |
| 63 | in_graph_desc = argv[1]; |
| 64 | out_dev_name = argv + 2; |
| 65 | nb_out_dev = argc - 2; |
| 66 | |
| 67 | av_register_all(); |
| 68 | avdevice_register_all(); |
| 69 | avfilter_register_all(); |
| 70 | |
| 71 | /* Create input graph */ |
| 72 | if (!(in_graph = avfilter_graph_alloc())) { |
| 73 | ret = AVERROR(ENOMEM); |
| 74 | av_log(NULL, AV_LOG_ERROR, "Unable to alloc graph graph: %s\n", |
| 75 | av_err2str(ret)); |
| 76 | goto fail; |
| 77 | } |
| 78 | ret = avfilter_graph_parse_ptr(in_graph, in_graph_desc, NULL, NULL, NULL); |
| 79 | if (ret < 0) { |
| 80 | av_log(NULL, AV_LOG_ERROR, "Unable to parse graph: %s\n", |
| 81 | av_err2str(ret)); |
| 82 | goto fail; |
| 83 | } |
| 84 | nb_streams = 0; |
| 85 | for (i = 0; i < in_graph->nb_filters; i++) { |
| 86 | AVFilterContext *f = in_graph->filters[i]; |
| 87 | for (j = 0; j < f->nb_inputs; j++) { |
| 88 | if (!f->inputs[j]) { |
| 89 | av_log(NULL, AV_LOG_ERROR, "Graph has unconnected inputs\n"); |
| 90 | ret = AVERROR(EINVAL); |
| 91 | goto fail; |
| 92 | } |
| 93 | } |
| 94 | for (j = 0; j < f->nb_outputs; j++) |
| 95 | if (!f->outputs[j]) |
| 96 | nb_streams++; |
| 97 | } |
| 98 | if (!nb_streams) { |
| 99 | av_log(NULL, AV_LOG_ERROR, "Graph has no output stream\n"); |
| 100 | ret = AVERROR(EINVAL); |
| 101 | goto fail; |
| 102 | } |
| 103 | if (nb_out_dev != 1 && nb_out_dev != nb_streams) { |
| 104 | av_log(NULL, AV_LOG_ERROR, |
| 105 | "Graph has %d output streams, %d devices given\n", |
| 106 | nb_streams, nb_out_dev); |
| 107 | ret = AVERROR(EINVAL); |
| 108 | goto fail; |
| 109 | } |
| 110 | |
| 111 | if (!(streams = av_calloc(nb_streams, sizeof(*streams)))) { |
| 112 | ret = AVERROR(ENOMEM); |
| 113 | av_log(NULL, AV_LOG_ERROR, "Could not allocate streams\n"); |
| 114 | } |
| 115 | st = streams; |
| 116 | for (i = 0; i < in_graph->nb_filters; i++) { |
| 117 | AVFilterContext *f = in_graph->filters[i]; |
| 118 | for (j = 0; j < f->nb_outputs; j++) { |
| 119 | if (!f->outputs[j]) { |
| 120 | if ((ret = create_sink(st++, in_graph, f, j)) < 0) |
| 121 | goto fail; |
| 122 | } |
| 123 | } |
| 124 | } |
| 125 | av_assert0(st - streams == nb_streams); |
| 126 | if ((ret = avfilter_graph_config(in_graph, NULL)) < 0) { |
| 127 | av_log(NULL, AV_LOG_ERROR, "Failed to configure graph\n"); |
| 128 | goto fail; |
| 129 | } |
| 130 | |
| 131 | /* Create output devices */ |
| 132 | for (i = 0; i < nb_out_dev; i++) { |
| 133 | char *fmt = NULL, *dev = out_dev_name[i]; |
| 134 | st = &streams[i]; |
| 135 | if ((dev = strchr(dev, ':'))) { |
| 136 | *(dev++) = 0; |
| 137 | fmt = out_dev_name[i]; |
| 138 | } |
| 139 | ret = avformat_alloc_output_context2(&st->mux, NULL, fmt, dev); |
| 140 | if (ret < 0) { |
| 141 | av_log(NULL, AV_LOG_ERROR, "Failed to allocate output: %s\n", |
| 142 | av_err2str(ret)); |
| 143 | goto fail; |
| 144 | } |
| 145 | if (!(st->mux->oformat->flags & AVFMT_NOFILE)) { |
| 146 | ret = avio_open2(&st->mux->pb, st->mux->filename, AVIO_FLAG_WRITE, |
| 147 | NULL, NULL); |
| 148 | if (ret < 0) { |
| 149 | av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n", |
| 150 | av_err2str(ret)); |
| 151 | goto fail; |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | for (; i < nb_streams; i++) |
| 156 | streams[i].mux = streams[0].mux; |
| 157 | |
| 158 | /* Create output device streams */ |
| 159 | for (i = 0; i < nb_streams; i++) { |
| 160 | st = &streams[i]; |
| 161 | if (!(st->stream = avformat_new_stream(st->mux, NULL))) { |
| 162 | ret = AVERROR(ENOMEM); |
| 163 | av_log(NULL, AV_LOG_ERROR, "Failed to create output stream\n"); |
| 164 | goto fail; |
| 165 | } |
| 166 | st->stream->codec->codec_type = st->link->type; |
| 167 | st->stream->time_base = st->stream->codec->time_base = |
| 168 | st->link->time_base; |
| 169 | switch (st->link->type) { |
| 170 | case AVMEDIA_TYPE_VIDEO: |
| 171 | st->stream->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
| 172 | st->stream->avg_frame_rate = |
| 173 | st->stream-> r_frame_rate = av_buffersink_get_frame_rate(st->sink); |
| 174 | st->stream->codec->width = st->link->w; |
| 175 | st->stream->codec->height = st->link->h; |
| 176 | st->stream->codec->sample_aspect_ratio = st->link->sample_aspect_ratio; |
| 177 | st->stream->codec->pix_fmt = st->link->format; |
| 178 | break; |
| 179 | case AVMEDIA_TYPE_AUDIO: |
| 180 | st->stream->codec->channel_layout = st->link->channel_layout; |
| 181 | st->stream->codec->channels = avfilter_link_get_channels(st->link); |
| 182 | st->stream->codec->sample_rate = st->link->sample_rate; |
| 183 | st->stream->codec->sample_fmt = st->link->format; |
| 184 | st->stream->codec->codec_id = |
| 185 | av_get_pcm_codec(st->stream->codec->sample_fmt, -1); |
| 186 | break; |
| 187 | default: |
| 188 | av_assert0(!"reached"); |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | /* Init output devices */ |
| 193 | for (i = 0; i < nb_out_dev; i++) { |
| 194 | st = &streams[i]; |
| 195 | if ((ret = avformat_write_header(st->mux, NULL)) < 0) { |
| 196 | av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n", |
| 197 | av_err2str(ret)); |
| 198 | goto fail; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /* Check output devices */ |
| 203 | for (i = 0; i < nb_streams; i++) { |
| 204 | st = &streams[i]; |
| 205 | ret = av_write_uncoded_frame_query(st->mux, st->stream->index); |
| 206 | if (ret < 0) { |
| 207 | av_log(st->mux, AV_LOG_ERROR, |
| 208 | "Uncoded frames not supported on stream #%d: %s\n", |
| 209 | i, av_err2str(ret)); |
| 210 | goto fail; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | while (run) { |
| 215 | ret = avfilter_graph_request_oldest(in_graph); |
| 216 | if (ret < 0) { |
| 217 | if (ret == AVERROR_EOF) { |
| 218 | run = 0; |
| 219 | } else { |
| 220 | av_log(NULL, AV_LOG_ERROR, "Error filtering: %s\n", |
| 221 | av_err2str(ret)); |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | for (i = 0; i < nb_streams; i++) { |
| 226 | st = &streams[i]; |
| 227 | while (1) { |
| 228 | if (!frame && !(frame = av_frame_alloc())) { |
| 229 | ret = AVERROR(ENOMEM); |
| 230 | av_log(NULL, AV_LOG_ERROR, "Could not allocate frame\n"); |
| 231 | goto fail; |
| 232 | } |
| 233 | ret = av_buffersink_get_frame_flags(st->sink, frame, |
| 234 | AV_BUFFERSINK_FLAG_NO_REQUEST); |
| 235 | if (ret < 0) { |
| 236 | if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) |
| 237 | av_log(NULL, AV_LOG_WARNING, "Error in sink: %s\n", |
| 238 | av_err2str(ret)); |
| 239 | break; |
| 240 | } |
| 241 | if (frame->pts != AV_NOPTS_VALUE) |
| 242 | frame->pts = av_rescale_q(frame->pts, |
| 243 | st->link ->time_base, |
| 244 | st->stream->time_base); |
| 245 | ret = av_interleaved_write_uncoded_frame(st->mux, |
| 246 | st->stream->index, |
| 247 | frame); |
| 248 | frame = NULL; |
| 249 | if (ret < 0) { |
| 250 | av_log(st->stream->codec, AV_LOG_ERROR, |
| 251 | "Error writing frame: %s\n", av_err2str(ret)); |
| 252 | goto fail; |
| 253 | } |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | ret = 0; |
| 258 | |
| 259 | for (i = 0; i < nb_out_dev; i++) { |
| 260 | st = &streams[i]; |
| 261 | av_write_trailer(st->mux); |
| 262 | } |
| 263 | |
| 264 | fail: |
| 265 | av_frame_free(&frame); |
| 266 | avfilter_graph_free(&in_graph); |
| 267 | if (streams) { |
| 268 | for (i = 0; i < nb_out_dev; i++) { |
| 269 | st = &streams[i]; |
| 270 | if (st->mux) { |
| 271 | if (st->mux->pb) |
| 272 | avio_close(st->mux->pb); |
| 273 | avformat_free_context(st->mux); |
| 274 | } |
| 275 | } |
| 276 | } |
| 277 | av_freep(&streams); |
| 278 | return ret < 0; |
| 279 | } |