zmqsend: Initialize ret to 0
[ffmpeg.git] / tools / sidxindex.c
1 /*
2  * Copyright (c) 2014 Martin Storsjo
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 #include <stdio.h>
22 #include <string.h>
23
24 #include "libavformat/avformat.h"
25 #include "libavutil/avstring.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/mathematics.h"
28
29 static int usage(const char *argv0, int ret)
30 {
31     fprintf(stderr, "%s -out foo.mpd file1\n", argv0);
32     return ret;
33 }
34
35 struct Track {
36     const char *name;
37     int64_t duration;
38     int bitrate;
39     int track_id;
40     int is_audio, is_video;
41     int width, height;
42     int sample_rate, channels;
43     int timescale;
44     char codec_str[30];
45     int64_t sidx_start, sidx_length;
46 };
47
48 struct Tracks {
49     int nb_tracks;
50     int64_t duration;
51     struct Track **tracks;
52     int multiple_tracks_per_file;
53 };
54
55 static void set_codec_str(AVCodecParameters *codecpar, char *str, int size)
56 {
57     switch (codecpar->codec_id) {
58     case AV_CODEC_ID_H264:
59         snprintf(str, size, "avc1");
60         if (codecpar->extradata_size >= 4 && codecpar->extradata[0] == 1) {
61             av_strlcatf(str, size, ".%02x%02x%02x",
62                         codecpar->extradata[1], codecpar->extradata[2],
63                         codecpar->extradata[3]);
64         }
65         break;
66     case AV_CODEC_ID_AAC:
67         snprintf(str, size, "mp4a.40"); // 0x40 is the mp4 object type for AAC
68         if (codecpar->extradata_size >= 2) {
69             int aot = codecpar->extradata[0] >> 3;
70             if (aot == 31)
71                 aot = ((AV_RB16(codecpar->extradata) >> 5) & 0x3f) + 32;
72             av_strlcatf(str, size, ".%d", aot);
73         }
74         break;
75     }
76 }
77
78 static int find_sidx(struct Tracks *tracks, int start_index,
79                      const char *file)
80 {
81     int err = 0;
82     AVIOContext *f = NULL;
83     int i;
84
85     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
86         goto fail;
87
88     while (!f->eof_reached) {
89         int64_t pos = avio_tell(f);
90         int32_t size, tag;
91
92         size = avio_rb32(f);
93         tag  = avio_rb32(f);
94         if (size < 8)
95             break;
96         if (tag == MKBETAG('s', 'i', 'd', 'x')) {
97             for (i = start_index; i < tracks->nb_tracks; i++) {
98                 struct Track *track = tracks->tracks[i];
99                 if (!track->sidx_start) {
100                     track->sidx_start  = pos;
101                     track->sidx_length = size;
102                 } else if (pos == track->sidx_start + track->sidx_length) {
103                     track->sidx_length = pos + size - track->sidx_start;
104                 }
105             }
106         }
107         if (avio_seek(f, pos + size, SEEK_SET) != pos + size)
108             break;
109     }
110
111 fail:
112     if (f)
113         avio_close(f);
114     return err;
115 }
116
117 static int handle_file(struct Tracks *tracks, const char *file)
118 {
119     AVFormatContext *ctx = NULL;
120     int err = 0, i, orig_tracks = tracks->nb_tracks;
121     char errbuf[50], *ptr;
122     struct Track *track;
123
124     err = avformat_open_input(&ctx, file, NULL, NULL);
125     if (err < 0) {
126         av_strerror(err, errbuf, sizeof(errbuf));
127         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
128         return 1;
129     }
130
131     err = avformat_find_stream_info(ctx, NULL);
132     if (err < 0) {
133         av_strerror(err, errbuf, sizeof(errbuf));
134         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
135         goto fail;
136     }
137
138     if (ctx->nb_streams < 1) {
139         fprintf(stderr, "No streams found in %s\n", file);
140         goto fail;
141     }
142     if (ctx->nb_streams > 1)
143         tracks->multiple_tracks_per_file = 1;
144
145     for (i = 0; i < ctx->nb_streams; i++) {
146         struct Track **temp;
147         AVStream *st = ctx->streams[i];
148
149         if (st->codecpar->bit_rate == 0) {
150             fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
151                     st->id, file);
152             continue;
153         }
154
155         track = av_mallocz(sizeof(*track));
156         if (!track) {
157             err = AVERROR(ENOMEM);
158             goto fail;
159         }
160         temp = av_realloc_array(tracks->tracks, tracks->nb_tracks + 1,
161                                 sizeof(*tracks->tracks));
162         if (!temp) {
163             av_free(track);
164             err = AVERROR(ENOMEM);
165             goto fail;
166         }
167         tracks->tracks = temp;
168         tracks->tracks[tracks->nb_tracks] = track;
169
170         track->name = file;
171         if ((ptr = strrchr(file, '/')))
172             track->name = ptr + 1;
173
174         track->bitrate   = st->codecpar->bit_rate;
175         track->track_id  = st->id;
176         track->timescale = st->time_base.den;
177         track->duration  = st->duration;
178         track->is_audio  = st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
179         track->is_video  = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
180
181         if (!track->is_audio && !track->is_video) {
182             fprintf(stderr,
183                     "Track %d in %s is neither video nor audio, skipping\n",
184                     track->track_id, file);
185             av_freep(&tracks->tracks[tracks->nb_tracks]);
186             continue;
187         }
188
189         tracks->duration = FFMAX(tracks->duration,
190                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
191                                                 track->timescale, AV_ROUND_UP));
192
193         if (track->is_audio) {
194             track->channels    = st->codecpar->channels;
195             track->sample_rate = st->codecpar->sample_rate;
196         }
197         if (track->is_video) {
198             track->width  = st->codecpar->width;
199             track->height = st->codecpar->height;
200         }
201         set_codec_str(st->codecpar, track->codec_str, sizeof(track->codec_str));
202
203         tracks->nb_tracks++;
204     }
205
206     avformat_close_input(&ctx);
207
208     err = find_sidx(tracks, orig_tracks, file);
209
210 fail:
211     if (ctx)
212         avformat_close_input(&ctx);
213     return err;
214 }
215
216 static void write_time(FILE *out, int64_t time, int decimals, enum AVRounding round)
217 {
218     int seconds = time / AV_TIME_BASE;
219     int fractions = time % AV_TIME_BASE;
220     int minutes = seconds / 60;
221     int hours = minutes / 60;
222     fractions = av_rescale_rnd(fractions, pow(10, decimals), AV_TIME_BASE, round);
223     seconds %= 60;
224     minutes %= 60;
225     fprintf(out, "PT");
226     if (hours)
227         fprintf(out, "%dH", hours);
228     if (hours || minutes)
229         fprintf(out, "%dM", minutes);
230     fprintf(out, "%d.%0*dS", seconds, decimals, fractions);
231 }
232
233 static int output_mpd(struct Tracks *tracks, const char *filename)
234 {
235     FILE *out;
236     int i, j, ret = 0;
237     struct Track **adaptation_sets_buf[2] = { NULL };
238     struct Track ***adaptation_sets;
239     int nb_tracks_buf[2] = { 0 };
240     int *nb_tracks;
241     int set, nb_sets;
242
243     if (!tracks->multiple_tracks_per_file) {
244         adaptation_sets = adaptation_sets_buf;
245         nb_tracks = nb_tracks_buf;
246         nb_sets = 2;
247         for (i = 0; i < 2; i++) {
248             adaptation_sets[i] = av_malloc_array(tracks->nb_tracks, sizeof(*adaptation_sets[i]));
249             if (!adaptation_sets[i]) {
250                 ret = AVERROR(ENOMEM);
251                 goto err;
252             }
253         }
254         for (i = 0; i < tracks->nb_tracks; i++) {
255             int set_index = -1;
256             if (tracks->tracks[i]->is_video)
257                 set_index = 0;
258             else if (tracks->tracks[i]->is_audio)
259                 set_index = 1;
260             else
261                 continue;
262             adaptation_sets[set_index][nb_tracks[set_index]++] = tracks->tracks[i];
263         }
264     } else {
265         adaptation_sets = &tracks->tracks;
266         nb_tracks = &tracks->nb_tracks;
267         nb_sets = 1;
268     }
269
270     out = fopen(filename, "w");
271     if (!out) {
272         ret = AVERROR(errno);
273         perror(filename);
274         return ret;
275     }
276     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
277     fprintf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
278                 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
279                 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
280                 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
281                 "\tprofiles=\"urn:mpeg:dash:profile:isoff-on-demand:2011\"\n"
282                 "\ttype=\"static\"\n");
283     fprintf(out, "\tmediaPresentationDuration=\"");
284     write_time(out, tracks->duration, 1, AV_ROUND_DOWN);
285     fprintf(out, "\"\n");
286     fprintf(out, "\tminBufferTime=\"PT5S\">\n");
287
288     fprintf(out, "\t<Period start=\"PT0.0S\">\n");
289
290     for (set = 0; set < nb_sets; set++) {
291         if (nb_tracks[set] == 0)
292             continue;
293         fprintf(out, "\t\t<AdaptationSet segmentAlignment=\"true\">\n");
294         if (nb_sets == 1) {
295             for (i = 0; i < nb_tracks[set]; i++) {
296                 struct Track *track = adaptation_sets[set][i];
297                 if (strcmp(track->name, adaptation_sets[set][0]->name))
298                     break;
299                 fprintf(out, "\t\t\t<ContentComponent id=\"%d\" contentType=\"%s\" />\n", track->track_id, track->is_audio ? "audio" : "video");
300             }
301         }
302
303         for (i = 0; i < nb_tracks[set]; ) {
304             struct Track *first_track = adaptation_sets[set][i];
305             int width = 0, height = 0, sample_rate = 0, channels = 0, bitrate = 0;
306             fprintf(out, "\t\t\t<Representation id=\"%d\" codecs=\"", i);
307             for (j = i; j < nb_tracks[set]; j++) {
308                 struct Track *track = adaptation_sets[set][j];
309                 if (strcmp(track->name, first_track->name))
310                     break;
311                 if (track->is_audio) {
312                     sample_rate = track->sample_rate;
313                     channels = track->channels;
314                 }
315                 if (track->is_video) {
316                     width = track->width;
317                     height = track->height;
318                 }
319                 bitrate += track->bitrate;
320                 if (j > i)
321                     fprintf(out, ",");
322                 fprintf(out, "%s", track->codec_str);
323             }
324             fprintf(out, "\" mimeType=\"%s/mp4\" bandwidth=\"%d\"",
325                     width ? "video" : "audio", bitrate);
326             if (width > 0 && height > 0)
327                 fprintf(out, " width=\"%d\" height=\"%d\"", width, height);
328             if (sample_rate > 0)
329                 fprintf(out, " audioSamplingRate=\"%d\"", sample_rate);
330             fprintf(out, ">\n");
331             if (channels > 0)
332                 fprintf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n", channels);
333             fprintf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", first_track->name);
334             fprintf(out, "\t\t\t\t<SegmentBase indexRange=\"%"PRId64"-%"PRId64"\" />\n", first_track->sidx_start, first_track->sidx_start + first_track->sidx_length - 1);
335             fprintf(out, "\t\t\t</Representation>\n");
336             i = j;
337         }
338         fprintf(out, "\t\t</AdaptationSet>\n");
339     }
340     fprintf(out, "\t</Period>\n");
341     fprintf(out, "</MPD>\n");
342
343     fclose(out);
344 err:
345     for (i = 0; i < 2; i++)
346         av_free(adaptation_sets_buf[i]);
347     return ret;
348 }
349
350 static void clean_tracks(struct Tracks *tracks)
351 {
352     int i;
353     for (i = 0; i < tracks->nb_tracks; i++) {
354         av_freep(&tracks->tracks[i]);
355     }
356     av_freep(&tracks->tracks);
357     tracks->nb_tracks = 0;
358 }
359
360 int main(int argc, char **argv)
361 {
362     const char *out = NULL;
363     struct Tracks tracks = { 0 };
364     int i;
365
366     av_register_all();
367
368     for (i = 1; i < argc; i++) {
369         if (!strcmp(argv[i], "-out")) {
370             out = argv[i + 1];
371             i++;
372         } else if (argv[i][0] == '-') {
373             return usage(argv[0], 1);
374         } else {
375             if (handle_file(&tracks, argv[i]))
376                 return 1;
377         }
378     }
379     if (!tracks.nb_tracks || !out)
380         return usage(argv[0], 1);
381
382     output_mpd(&tracks, out);
383
384     clean_tracks(&tracks);
385
386     return 0;
387 }