6c6b3a470c95cff857d81dd22505509e7a45a6b7
[ffmpeg.git] / tools / sidxindex.c
1 /*
2  * Copyright (c) 2014 Martin Storsjo
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; 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     int64_t  earliest_presentation;
47     uint32_t earliest_presentation_timescale;
48 };
49
50 struct Tracks {
51     int nb_tracks;
52     int64_t duration;
53     struct Track **tracks;
54     int multiple_tracks_per_file;
55 };
56
57 static void set_codec_str(AVCodecContext *codec, char *str, int size)
58 {
59     switch (codec->codec_id) {
60     case AV_CODEC_ID_H264:
61         snprintf(str, size, "avc1");
62         if (codec->extradata_size >= 4 && codec->extradata[0] == 1) {
63             av_strlcatf(str, size, ".%02x%02x%02x",
64                         codec->extradata[1], codec->extradata[2], codec->extradata[3]);
65         }
66         break;
67     case AV_CODEC_ID_AAC:
68         snprintf(str, size, "mp4a.40"); // 0x40 is the mp4 object type for AAC
69         if (codec->extradata_size >= 2) {
70             int aot = codec->extradata[0] >> 3;
71             if (aot == 31)
72                 aot = ((AV_RB16(codec->extradata) >> 5) & 0x3f) + 32;
73             av_strlcatf(str, size, ".%d", aot);
74         }
75         break;
76     }
77 }
78
79 static int find_sidx(struct Tracks *tracks, int start_index,
80                      const char *file)
81 {
82     int err = 0;
83     AVIOContext *f = NULL;
84     int i;
85
86     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
87         goto fail;
88
89     while (!f->eof_reached) {
90         int64_t pos = avio_tell(f);
91         int32_t size, tag;
92
93         size = avio_rb32(f);
94         tag  = avio_rb32(f);
95         if (size < 8)
96             break;
97         if (tag == MKBETAG('s', 'i', 'd', 'x')) {
98             int version, track_id;
99             uint32_t timescale;
100             int64_t earliest_presentation;
101             version = avio_r8(f);
102             avio_rb24(f); /* flags */
103             track_id = avio_rb32(f);
104             timescale = avio_rb32(f);
105             earliest_presentation = version ? avio_rb64(f) : avio_rb32(f);
106             for (i = start_index; i < tracks->nb_tracks; i++) {
107                 struct Track *track = tracks->tracks[i];
108                 if (!track->sidx_start) {
109                     track->sidx_start  = pos;
110                     track->sidx_length = size;
111                 } else if (pos == track->sidx_start + track->sidx_length) {
112                     track->sidx_length = pos + size - track->sidx_start;
113                 }
114                 if (track->track_id == track_id) {
115                     track->earliest_presentation = earliest_presentation;
116                     track->earliest_presentation_timescale = timescale;
117                 }
118             }
119         }
120         if (avio_seek(f, pos + size, SEEK_SET) != pos + size)
121             break;
122     }
123
124 fail:
125     if (f)
126         avio_close(f);
127     return err;
128 }
129
130 static int handle_file(struct Tracks *tracks, const char *file)
131 {
132     AVFormatContext *ctx = NULL;
133     int err = 0, i, orig_tracks = tracks->nb_tracks;
134     char errbuf[50], *ptr;
135     struct Track *track;
136
137     err = avformat_open_input(&ctx, file, NULL, NULL);
138     if (err < 0) {
139         av_strerror(err, errbuf, sizeof(errbuf));
140         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
141         return 1;
142     }
143
144     err = avformat_find_stream_info(ctx, NULL);
145     if (err < 0) {
146         av_strerror(err, errbuf, sizeof(errbuf));
147         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
148         goto fail;
149     }
150
151     if (ctx->nb_streams < 1) {
152         fprintf(stderr, "No streams found in %s\n", file);
153         goto fail;
154     }
155     if (ctx->nb_streams > 1)
156         tracks->multiple_tracks_per_file = 1;
157
158     for (i = 0; i < ctx->nb_streams; i++) {
159         struct Track **temp;
160         AVStream *st = ctx->streams[i];
161
162         if (st->codec->bit_rate == 0) {
163             fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
164                     st->id, file);
165             continue;
166         }
167
168         track = av_mallocz(sizeof(*track));
169         if (!track) {
170             err = AVERROR(ENOMEM);
171             goto fail;
172         }
173         temp = av_realloc(tracks->tracks,
174                           sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
175         if (!temp) {
176             av_free(track);
177             err = AVERROR(ENOMEM);
178             goto fail;
179         }
180         tracks->tracks = temp;
181         tracks->tracks[tracks->nb_tracks] = track;
182
183         track->name = file;
184         if ((ptr = strrchr(file, '/')))
185             track->name = ptr + 1;
186
187         track->bitrate   = st->codec->bit_rate;
188         track->track_id  = st->id;
189         track->timescale = st->time_base.den;
190         track->duration  = st->duration;
191         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
192         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
193
194         if (!track->is_audio && !track->is_video) {
195             fprintf(stderr,
196                     "Track %d in %s is neither video nor audio, skipping\n",
197                     track->track_id, file);
198             av_freep(&tracks->tracks[tracks->nb_tracks]);
199             continue;
200         }
201
202         tracks->duration = FFMAX(tracks->duration,
203                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
204                                                 track->timescale, AV_ROUND_UP));
205
206         if (track->is_audio) {
207             track->channels    = st->codec->channels;
208             track->sample_rate = st->codec->sample_rate;
209         }
210         if (track->is_video) {
211             track->width  = st->codec->width;
212             track->height = st->codec->height;
213         }
214         set_codec_str(st->codec, track->codec_str, sizeof(track->codec_str));
215
216         tracks->nb_tracks++;
217     }
218
219     avformat_close_input(&ctx);
220
221     err = find_sidx(tracks, orig_tracks, file);
222
223 fail:
224     if (ctx)
225         avformat_close_input(&ctx);
226     return err;
227 }
228
229 static void write_time(FILE *out, int64_t time, int decimals, enum AVRounding round)
230 {
231     int seconds = time / AV_TIME_BASE;
232     int fractions = time % AV_TIME_BASE;
233     int minutes = seconds / 60;
234     int hours = minutes / 60;
235     fractions = av_rescale_rnd(fractions, pow(10, decimals), AV_TIME_BASE, round);
236     seconds %= 60;
237     minutes %= 60;
238     fprintf(out, "PT");
239     if (hours)
240         fprintf(out, "%dH", hours);
241     if (hours || minutes)
242         fprintf(out, "%dM", minutes);
243     fprintf(out, "%d.%0*dS", seconds, decimals, fractions);
244 }
245
246 static int output_mpd(struct Tracks *tracks, const char *filename)
247 {
248     FILE *out;
249     int i, j, ret = 0;
250     struct Track **adaptation_sets_buf[2] = { NULL };
251     struct Track ***adaptation_sets;
252     int nb_tracks_buf[2] = { 0 };
253     int *nb_tracks;
254     int set, nb_sets;
255
256     if (!tracks->multiple_tracks_per_file) {
257         adaptation_sets = adaptation_sets_buf;
258         nb_tracks = nb_tracks_buf;
259         nb_sets = 2;
260         for (i = 0; i < 2; i++) {
261             adaptation_sets[i] = av_malloc(sizeof(*adaptation_sets[i]) * tracks->nb_tracks);
262             if (!adaptation_sets[i]) {
263                 ret = AVERROR(ENOMEM);
264                 goto err;
265             }
266         }
267         for (i = 0; i < tracks->nb_tracks; i++) {
268             int set_index = -1;
269             if (tracks->tracks[i]->is_video)
270                 set_index = 0;
271             else if (tracks->tracks[i]->is_audio)
272                 set_index = 1;
273             else
274                 continue;
275             adaptation_sets[set_index][nb_tracks[set_index]++] = tracks->tracks[i];
276         }
277     } else {
278         adaptation_sets = &tracks->tracks;
279         nb_tracks = &tracks->nb_tracks;
280         nb_sets = 1;
281     }
282
283     out = fopen(filename, "w");
284     if (!out) {
285         ret = AVERROR(errno);
286         perror(filename);
287         return ret;
288     }
289     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
290     fprintf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
291                 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
292                 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
293                 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
294                 "\tprofiles=\"urn:mpeg:dash:profile:isoff-on-demand:2011\"\n"
295                 "\ttype=\"static\"\n");
296     fprintf(out, "\tmediaPresentationDuration=\"");
297     write_time(out, tracks->duration, 1, AV_ROUND_DOWN);
298     fprintf(out, "\"\n");
299     fprintf(out, "\tminBufferTime=\"PT5S\">\n");
300
301     fprintf(out, "\t<Period start=\"PT0.0S\">\n");
302
303     for (set = 0; set < nb_sets; set++) {
304         if (nb_tracks[set] == 0)
305             continue;
306         fprintf(out, "\t\t<AdaptationSet segmentAlignment=\"true\">\n");
307         if (nb_sets == 1) {
308             for (i = 0; i < nb_tracks[set]; i++) {
309                 struct Track *track = adaptation_sets[set][i];
310                 if (strcmp(track->name, adaptation_sets[set][0]->name))
311                     break;
312                 fprintf(out, "\t\t\t<ContentComponent id=\"%d\" contentType=\"%s\" />\n", track->track_id, track->is_audio ? "audio" : "video");
313             }
314         }
315
316         for (i = 0; i < nb_tracks[set]; ) {
317             struct Track *first_track = adaptation_sets[set][i];
318             int width = 0, height = 0, sample_rate = 0, channels = 0, bitrate = 0;
319             fprintf(out, "\t\t\t<Representation id=\"%d\" codecs=\"", i);
320             for (j = i; j < nb_tracks[set]; j++) {
321                 struct Track *track = adaptation_sets[set][j];
322                 if (strcmp(track->name, first_track->name))
323                     break;
324                 if (track->is_audio) {
325                     sample_rate = track->sample_rate;
326                     channels = track->channels;
327                 }
328                 if (track->is_video) {
329                     width = track->width;
330                     height = track->height;
331                 }
332                 bitrate += track->bitrate;
333                 if (j > i)
334                     fprintf(out, ",");
335                 fprintf(out, "%s", track->codec_str);
336             }
337             fprintf(out, "\" mimeType=\"%s/mp4\" bandwidth=\"%d\"",
338                     width ? "video" : "audio", bitrate);
339             if (width > 0 && height > 0)
340                 fprintf(out, " width=\"%d\" height=\"%d\"", width, height);
341             if (sample_rate > 0)
342                 fprintf(out, " audioSamplingRate=\"%d\"", sample_rate);
343             fprintf(out, ">\n");
344             if (channels > 0)
345                 fprintf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n", channels);
346             fprintf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", first_track->name);
347             fprintf(out, "\t\t\t\t<SegmentBase indexRange=\"%"PRId64"-%"PRId64"\" />\n", first_track->sidx_start, first_track->sidx_start + first_track->sidx_length - 1);
348             fprintf(out, "\t\t\t</Representation>\n");
349             i = j;
350         }
351         fprintf(out, "\t\t</AdaptationSet>\n");
352     }
353     fprintf(out, "\t</Period>\n");
354     fprintf(out, "</MPD>\n");
355
356     fclose(out);
357 err:
358     for (i = 0; i < 2; i++)
359         av_free(adaptation_sets_buf[i]);
360     return ret;
361 }
362
363 static void clean_tracks(struct Tracks *tracks)
364 {
365     int i;
366     for (i = 0; i < tracks->nb_tracks; i++) {
367         av_freep(&tracks->tracks[i]);
368     }
369     av_freep(&tracks->tracks);
370     tracks->nb_tracks = 0;
371 }
372
373 int main(int argc, char **argv)
374 {
375     const char *out = NULL;
376     struct Tracks tracks = { 0 };
377     int i;
378
379     av_register_all();
380
381     for (i = 1; i < argc; i++) {
382         if (!strcmp(argv[i], "-out")) {
383             out = argv[i + 1];
384             i++;
385         } else if (argv[i][0] == '-') {
386             return usage(argv[0], 1);
387         } else {
388             if (handle_file(&tracks, argv[i]))
389                 return 1;
390         }
391     }
392     if (!tracks.nb_tracks || !out)
393         return usage(argv[0], 1);
394
395     output_mpd(&tracks, out);
396
397     clean_tracks(&tracks);
398
399     return 0;
400 }