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 || sscanf(key, "CHAPTER%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 (!strcmp(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);
142 for (j = 0; j < tl; j++)
143 tt[j] = av_toupper(t[j]);
149 /* The format in which the pictures are stored is the FLAC format.
150 * Xiph says: "The binary FLAC picture structure is base64 encoded
151 * and placed within a VorbisComment with the tag name
152 * 'METADATA_BLOCK_PICTURE'. This is the preferred and
153 * recommended way of embedding cover art within VorbisComments."
155 if (!strcmp(tt, "METADATA_BLOCK_PICTURE") && parse_picture) {
156 int ret, len = AV_BASE64_DECODE_SIZE(vl);
157 char *pict = av_malloc(len);
160 av_log(as, AV_LOG_WARNING, "out-of-memory error. Skipping cover art block.\n");
165 ret = av_base64_decode(pict, ct, len);
169 ret = ff_flac_parse_picture(as, pict, ret);
172 av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
175 } else if (!ogm_chapter(as, tt, ct)) {
177 if (av_dict_get(*m, tt, NULL, 0)) {
178 av_dict_set(m, tt, ";", AV_DICT_APPEND);
180 av_dict_set(m, tt, ct,
181 AV_DICT_DONT_STRDUP_KEY |
189 av_log(as, AV_LOG_INFO,
190 "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p);
192 av_log(as, AV_LOG_INFO,
193 "truncated comment header, %i comments not found\n", n);
195 ff_metadata_conv(m, NULL, ff_vorbiscomment_metadata_conv);
201 * Parse the vorbis header
203 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
204 * [vorbis_version] = read 32 bits as unsigned integer | Not used
205 * [audio_channels] = read 8 bit integer as unsigned | Used
206 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
207 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
208 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
209 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
210 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
211 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
212 * [framing_flag] = read one bit | Not Used
215 struct oggvorbis_private {
217 unsigned char *packet[3];
218 AVVorbisParseContext *vp;
223 static int fixup_vorbis_headers(AVFormatContext *as,
224 struct oggvorbis_private *priv,
227 int i, offset, len, err;
231 len = priv->len[0] + priv->len[1] + priv->len[2];
232 buf_len = len + len / 255 + 64;
235 return AVERROR_INVALIDDATA;
237 ptr = *buf = av_realloc(NULL, buf_len);
239 return AVERROR(ENOMEM);
240 memset(*buf, '\0', buf_len);
244 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
245 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
246 for (i = 0; i < 3; i++) {
247 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
248 offset += priv->len[i];
249 av_freep(&priv->packet[i]);
251 if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0)
256 static void vorbis_cleanup(AVFormatContext *s, int idx)
258 struct ogg *ogg = s->priv_data;
259 struct ogg_stream *os = ogg->streams + idx;
260 struct oggvorbis_private *priv = os->private;
263 av_vorbis_parse_free(&priv->vp);
264 for (i = 0; i < 3; i++)
265 av_freep(&priv->packet[i]);
269 static int vorbis_update_metadata(AVFormatContext *s, int idx)
271 struct ogg *ogg = s->priv_data;
272 struct ogg_stream *os = ogg->streams + idx;
273 AVStream *st = s->streams[idx];
279 /* New metadata packet; release old data. */
280 av_dict_free(&st->metadata);
281 ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
286 /* Update the metadata if possible. */
287 av_freep(&os->new_metadata);
289 os->new_metadata = av_packet_pack_dictionary(st->metadata, &os->new_metadata_size);
290 /* Send an empty dictionary to indicate that metadata has been cleared. */
292 os->new_metadata = av_malloc(1);
293 os->new_metadata_size = 0;
299 static int vorbis_header(AVFormatContext *s, int idx)
301 struct ogg *ogg = s->priv_data;
302 AVStream *st = s->streams[idx];
303 struct ogg_stream *os = ogg->streams + idx;
304 struct oggvorbis_private *priv;
305 int pkt_type = os->buf[os->pstart];
308 os->private = av_mallocz(sizeof(struct oggvorbis_private));
310 return AVERROR(ENOMEM);
316 return priv->vp ? 0 : AVERROR_INVALIDDATA;
318 if (os->psize < 1 || pkt_type > 5)
319 return AVERROR_INVALIDDATA;
321 if (priv->packet[pkt_type >> 1])
322 return AVERROR_INVALIDDATA;
323 if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
324 return priv->vp ? 0 : AVERROR_INVALIDDATA;
326 priv->len[pkt_type >> 1] = os->psize;
327 priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
328 if (!priv->packet[pkt_type >> 1])
329 return AVERROR(ENOMEM);
330 memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
331 if (os->buf[os->pstart] == 1) {
332 const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
333 unsigned blocksize, bs0, bs1;
338 return AVERROR_INVALIDDATA;
340 if (bytestream_get_le32(&p) != 0) /* vorbis_version */
341 return AVERROR_INVALIDDATA;
343 channels = bytestream_get_byte(&p);
344 if (st->codecpar->channels && channels != st->codecpar->channels) {
345 av_log(s, AV_LOG_ERROR, "Channel change is not supported\n");
346 return AVERROR_PATCHWELCOME;
348 st->codecpar->channels = channels;
349 srate = bytestream_get_le32(&p);
350 p += 4; // skip maximum bitrate
351 st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate
352 p += 4; // skip minimum bitrate
354 blocksize = bytestream_get_byte(&p);
355 bs0 = blocksize & 15;
356 bs1 = blocksize >> 4;
359 return AVERROR_INVALIDDATA;
360 if (bs0 < 6 || bs1 > 13)
361 return AVERROR_INVALIDDATA;
363 if (bytestream_get_byte(&p) != 1) /* framing_flag */
364 return AVERROR_INVALIDDATA;
366 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
367 st->codecpar->codec_id = AV_CODEC_ID_VORBIS;
370 st->codecpar->sample_rate = srate;
371 avpriv_set_pts_info(st, 64, 1, srate);
373 } else if (os->buf[os->pstart] == 3) {
374 if (vorbis_update_metadata(s, idx) >= 0 && priv->len[1] > 10) {
377 int ret = ff_replaygain_export(st, st->metadata);
381 // drop all metadata we parsed and which is not required by libvorbis
382 new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
383 if (new_len >= 16 && new_len < os->psize) {
384 AV_WL32(priv->packet[1] + new_len - 5, 0);
385 priv->packet[1][new_len - 1] = 1;
386 priv->len[1] = new_len;
390 int ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata);
392 st->codecpar->extradata_size = 0;
395 st->codecpar->extradata_size = ret;
397 priv->vp = av_vorbis_parse_init(st->codecpar->extradata, st->codecpar->extradata_size);
399 av_freep(&st->codecpar->extradata);
400 st->codecpar->extradata_size = 0;
401 return AVERROR_UNKNOWN;
408 static int vorbis_packet(AVFormatContext *s, int idx)
410 struct ogg *ogg = s->priv_data;
411 struct ogg_stream *os = ogg->streams + idx;
412 struct oggvorbis_private *priv = os->private;
413 int duration, flags = 0;
416 return AVERROR_INVALIDDATA;
418 /* first packet handling
419 * here we parse the duration of each packet in the first page and compare
420 * the total duration to the page granule to find the encoder delay and
421 * set the first timestamp */
422 if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS) && (int64_t)os->granule>=0) {
424 uint8_t *last_pkt = os->buf + os->pstart;
425 uint8_t *next_pkt = last_pkt;
427 av_vorbis_parse_reset(priv->vp);
430 d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
432 os->pflags |= AV_PKT_FLAG_CORRUPT;
434 } else if (flags & VORBIS_FLAG_COMMENT) {
435 vorbis_update_metadata(s, idx);
439 last_pkt = next_pkt = next_pkt + os->psize;
440 for (; seg < os->nsegs; seg++) {
441 if (os->segments[seg] < 255) {
442 int d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
444 duration = os->granule;
446 } else if (flags & VORBIS_FLAG_COMMENT) {
447 vorbis_update_metadata(s, idx);
451 last_pkt = next_pkt + os->segments[seg];
453 next_pkt += os->segments[seg];
456 os->lastdts = os->granule - duration;
458 if (!os->granule && duration) //hack to deal with broken files (Ticket3710)
459 os->lastpts = os->lastdts = AV_NOPTS_VALUE;
461 if (s->streams[idx]->start_time == AV_NOPTS_VALUE) {
462 s->streams[idx]->start_time = FFMAX(os->lastpts, 0);
463 if (s->streams[idx]->duration != AV_NOPTS_VALUE)
464 s->streams[idx]->duration -= s->streams[idx]->start_time;
466 priv->final_pts = AV_NOPTS_VALUE;
467 av_vorbis_parse_reset(priv->vp);
470 /* parse packet duration */
472 duration = av_vorbis_parse_frame_flags(priv->vp, os->buf + os->pstart, 1, &flags);
474 os->pflags |= AV_PKT_FLAG_CORRUPT;
476 } else if (flags & VORBIS_FLAG_COMMENT) {
477 vorbis_update_metadata(s, idx);
480 os->pduration = duration;
483 /* final packet handling
484 * here we save the pts of the first packet in the final page, sum up all
485 * packet durations in the final page except for the last one, and compare
486 * to the page granule to find the duration of the final packet */
487 if (os->flags & OGG_FLAG_EOS) {
488 if (os->lastpts != AV_NOPTS_VALUE) {
489 priv->final_pts = os->lastpts;
490 priv->final_duration = 0;
492 if (os->segp == os->nsegs)
493 os->pduration = os->granule - priv->final_pts - priv->final_duration;
494 priv->final_duration += os->pduration;
500 const struct ogg_codec ff_vorbis_codec = {
501 .magic = "\001vorbis",
503 .header = vorbis_header,
504 .packet = vorbis_packet,
505 .cleanup = vorbis_cleanup,