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
create_sink(Stream * st,AVFilterGraph * graph,AVFilterContext * f,int idx)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
main(int argc,char ** argv)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 }
276