2 * Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
27 #include "libavutil/avstring.h"
28 #include "libavutil/base64.h"
29 #include "libavutil/bswap.h"
30 #include "libavutil/dict.h"
32 #include "libavcodec/bytestream.h"
33 #include "libavcodec/vorbis_parser.h"
36 #include "flac_picture.h"
39 #include "vorbiscomment.h"
40 #include "replaygain.h"
42 static int ogm_chapter(AVFormatContext *as, uint8_t *key, uint8_t *val)
44 int i, cnum, h, m, s, ms, keylen = strlen(key);
45 AVChapter *chapter = NULL;
47 if (keylen < 9 || av_strncasecmp(key, "CHAPTER", 7) || sscanf(key+7, "%03d", &cnum) != 1)
51 if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4)
54 avpriv_new_chapter(as, cnum, (AVRational) { 1, 1000 },
55 ms + 1000 * (s + 60 * (m + 60 * h)),
56 AV_NOPTS_VALUE, NULL);
58 } else if (!av_strcasecmp(key + keylen - 4, "NAME")) {
59 for (i = 0; i < as->nb_chapters; i++)
60 if (as->chapters[i]->id == cnum) {
61 chapter = as->chapters[i];
67 av_dict_set(&chapter->metadata, "title", val, AV_DICT_DONT_STRDUP_VAL);
75 int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st,
76 const uint8_t *buf, int size)
78 int updates = ff_vorbis_comment(as, &st->metadata, buf, size, 1);
81 st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
87 int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m,
88 const uint8_t *buf, int size,
91 const uint8_t *p = buf;
92 const uint8_t *end = buf + size;
97 /* must have vendor_length and user_comment_list_length */
99 return AVERROR_INVALIDDATA;
101 s = bytestream_get_le32(&p);
103 if (end - p - 4 < s || s < 0)
104 return AVERROR_INVALIDDATA;
108 n = bytestream_get_le32(&p);
110 while (end - p >= 4 && n > 0) {
114 s = bytestream_get_le32(&p);
116 if (end - p < s || s < 0)
123 v = memchr(t, '=', s);
134 tt = av_malloc(tl + 1);
135 ct = av_malloc(vl + 1);
139 return AVERROR(ENOMEM);
148 /* The format in which the pictures are stored is the FLAC format.
149 * Xiph says: "The binary FLAC picture structure is base64 encoded
150 * and placed within a VorbisComment with the tag name
151 * 'METADATA_BLOCK_PICTURE'. This is the preferred and
152 * recommended way of embedding cover art within VorbisComments."
154 if (!strcmp(tt, "METADATA_BLOCK_PICTURE") && parse_picture) {
155 int ret, len = AV_BASE64_DECODE_SIZE(vl);
156 char *pict = av_malloc(len);
159 av_log(as, AV_LOG_WARNING, "out-of-memory error. Skipping cover art block.\n");
164 ret = av_base64_decode(pict, ct, len);
168 ret = ff_flac_parse_picture(as, pict, ret);
171 av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
174 } else if (!ogm_chapter(as, tt, ct)) {
176 if (av_dict_get(*m, tt, NULL, 0)) {
177 av_dict_set(m, tt, ";", AV_DICT_APPEND);
179 av_dict_set(m, tt, ct,
180 AV_DICT_DONT_STRDUP_KEY |
188 av_log(as, AV_LOG_INFO,
189 "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p);
191 av_log(as, AV_LOG_INFO,
192 "truncated comment header, %i comments not found\n", n);
194 ff_metadata_conv(m, NULL, ff_vorbiscomment_metadata_conv);
200 * Parse the vorbis header
202 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
203 * [vorbis_version] = read 32 bits as unsigned integer | Not used
204 * [audio_channels] = read 8 bit integer as unsigned | Used
205 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
206 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
207 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
208 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
209 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
210 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
211 * [framing_flag] = read one bit | Not Used
214 struct oggvorbis_private {
216 unsigned char *packet[3];
217 AVVorbisParseContext *vp;
222 static int fixup_vorbis_headers(AVFormatContext *as,
223 struct oggvorbis_private *priv,
226 int i, offset, len, err;
230 len = priv->len[0] + priv->len[1] + priv->len[2];
231 buf_len = len + len / 255 + 64;
234 return AVERROR_INVALIDDATA;
236 ptr = *buf = av_realloc(NULL, buf_len);
238 return AVERROR(ENOMEM);
239 memset(*buf, '\0', buf_len);
243 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
244 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
245 for (i = 0; i < 3; i++) {
246 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
247 offset += priv->len[i];
248 av_freep(&priv->packet[i]);
250 if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0)
255 static void vorbis_cleanup(AVFormatContext *s, int idx)
257 struct ogg *ogg = s->priv_data;
258 struct ogg_stream *os = ogg->streams + idx;
259 struct oggvorbis_private *priv = os->private;
262 av_vorbis_parse_free(&priv->vp);
263 for (i = 0; i < 3; i++)
264 av_freep(&priv->packet[i]);
268 static int vorbis_update_metadata(AVFormatContext *s, int idx)
270 struct ogg *ogg = s->priv_data;
271 struct ogg_stream *os = ogg->streams + idx;
272 AVStream *st = s->streams[idx];
278 /* New metadata packet; release old data. */
279 av_dict_free(&st->metadata);
280 ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
285 /* Update the metadata if possible. */
286 av_freep(&os->new_metadata);
288 os->new_metadata = av_packet_pack_dictionary(st->metadata, &os->new_metadata_size);
289 /* Send an empty dictionary to indicate that metadata has been cleared. */
291 os->new_metadata = av_malloc(1);
292 os->new_metadata_size = 0;
298 static int vorbis_header(AVFormatContext *s, int idx)
300 struct ogg *ogg = s->priv_data;
301 AVStream *st = s->streams[idx];
302 struct ogg_stream *os = ogg->streams + idx;
303 struct oggvorbis_private *priv;
304 int pkt_type = os->buf[os->pstart];
307 os->private = av_mallocz(sizeof(struct oggvorbis_private));
309 return AVERROR(ENOMEM);
315 return priv->vp ? 0 : AVERROR_INVALIDDATA;
317 if (os->psize < 1 || pkt_type > 5)
318 return AVERROR_INVALIDDATA;
320 if (priv->packet[pkt_type >> 1])
321 return AVERROR_INVALIDDATA;
322 if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
323 return priv->vp ? 0 : AVERROR_INVALIDDATA;
325 priv->len[pkt_type >> 1] = os->psize;
326 priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
327 if (!priv->packet[pkt_type >> 1])
328 return AVERROR(ENOMEM);
329 memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
330 if (os->buf[os->pstart] == 1) {
331 const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
332 unsigned blocksize, bs0, bs1;
337 return AVERROR_INVALIDDATA;
339 if (bytestream_get_le32(&p) != 0) /* vorbis_version */
340 return AVERROR_INVALIDDATA;
342 channels = bytestream_get_byte(&p);
343 if (st->codecpar->channels && channels != st->codecpar->channels) {
344 av_log(s, AV_LOG_ERROR, "Channel change is not supported\n");
345 return AVERROR_PATCHWELCOME;
347 st->codecpar->channels = channels;
348 srate = bytestream_get_le32(&p);
349 p += 4; // skip maximum bitrate
350 st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate
351 p += 4; // skip minimum bitrate
353 blocksize = bytestream_get_byte(&p);
354 bs0 = blocksize & 15;
355 bs1 = blocksize >> 4;
358 return AVERROR_INVALIDDATA;
359 if (bs0 < 6 || bs1 > 13)
360 return AVERROR_INVALIDDATA;
362 if (bytestream_get_byte(&p) != 1) /* framing_flag */
363 return AVERROR_INVALIDDATA;
365 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
366 st->codecpar->codec_id = AV_CODEC_ID_VORBIS;
369 st->codecpar->sample_rate = srate;
370 avpriv_set_pts_info(st, 64, 1, srate);
372 } else if (os->buf[os->pstart] == 3) {
373 if (vorbis_update_metadata(s, idx) >= 0 && priv->len[1] > 10) {
376 int ret = ff_replaygain_export(st, st->metadata);
380 // drop all metadata we parsed and which is not required by libvorbis
381 new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
382 if (new_len >= 16 && new_len < os->psize) {
383 AV_WL32(priv->packet[1] + new_len - 5, 0);
384 priv->packet[1][new_len - 1] = 1;
385 priv->len[1] = new_len;
389 int ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata);
391 st->codecpar->extradata_size = 0;
394 st->codecpar->extradata_size = ret;
396 priv->vp = av_vorbis_parse_init(st->codecpar->extradata, st->codecpar->extradata_size);
398 av_freep(&st->codecpar->extradata);
399 st->codecpar->extradata_size = 0;
400 return AVERROR_UNKNOWN;
407 static int vorbis_packet(AVFormatContext *s, int idx)
409 struct ogg *ogg = s->priv_data;
410 struct ogg_stream *os = ogg->streams + idx;
411 struct oggvorbis_private *priv = os->private;
412 int duration, flags = 0;
415 return AVERROR_INVALIDDATA;
417 /* first packet handling
418 * here we parse the duration of each packet in the first page and compare
419 * the total duration to the page granule to find the encoder delay and
420 * set the first timestamp */
421 if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS) && (int64_t)os->granule>=0) {
423 uint8_t *last_pkt = os->buf + os->pstart;
424 uint8_t *next_pkt = last_pkt;
426 av_vorbis_parse_reset(priv->vp);
429 d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
431 os->pflags |= AV_PKT_FLAG_CORRUPT;
433 } else if (flags & VORBIS_FLAG_COMMENT) {
434 vorbis_update_metadata(s, idx);
438 last_pkt = next_pkt = next_pkt + os->psize;
439 for (; seg < os->nsegs; seg++) {
440 if (os->segments[seg] < 255) {
441 int d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
443 duration = os->granule;
445 } else if (flags & VORBIS_FLAG_COMMENT) {
446 vorbis_update_metadata(s, idx);
450 last_pkt = next_pkt + os->segments[seg];
452 next_pkt += os->segments[seg];
455 os->lastdts = os->granule - duration;
457 if (!os->granule && duration) //hack to deal with broken files (Ticket3710)
458 os->lastpts = os->lastdts = AV_NOPTS_VALUE;
460 if (s->streams[idx]->start_time == AV_NOPTS_VALUE) {
461 s->streams[idx]->start_time = FFMAX(os->lastpts, 0);
462 if (s->streams[idx]->duration != AV_NOPTS_VALUE)
463 s->streams[idx]->duration -= s->streams[idx]->start_time;
465 priv->final_pts = AV_NOPTS_VALUE;
466 av_vorbis_parse_reset(priv->vp);
469 /* parse packet duration */
471 duration = av_vorbis_parse_frame_flags(priv->vp, os->buf + os->pstart, 1, &flags);
473 os->pflags |= AV_PKT_FLAG_CORRUPT;
475 } else if (flags & VORBIS_FLAG_COMMENT) {
476 vorbis_update_metadata(s, idx);
479 os->pduration = duration;
482 /* final packet handling
483 * here we save the pts of the first packet in the final page, sum up all
484 * packet durations in the final page except for the last one, and compare
485 * to the page granule to find the duration of the final packet */
486 if (os->flags & OGG_FLAG_EOS) {
487 if (os->lastpts != AV_NOPTS_VALUE) {
488 priv->final_pts = os->lastpts;
489 priv->final_duration = 0;
491 if (os->segp == os->nsegs)
492 os->pduration = os->granule - priv->final_pts - priv->final_duration;
493 priv->final_duration += os->pduration;
499 const struct ogg_codec ff_vorbis_codec = {
500 .magic = "\001vorbis",
502 .header = vorbis_header,
503 .packet = vorbis_packet,
504 .cleanup = vorbis_cleanup,