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) {
157 char *pict = av_malloc(vl);
162 return AVERROR(ENOMEM);
164 if ((ret = av_base64_decode(pict, ct, vl)) > 0)
165 ret = ff_flac_parse_picture(as, pict, ret);
170 av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
173 } else if (!ogm_chapter(as, tt, ct)) {
175 av_dict_set(m, tt, ct,
176 AV_DICT_DONT_STRDUP_KEY |
177 AV_DICT_DONT_STRDUP_VAL);
183 av_log(as, AV_LOG_INFO,
184 "%ti bytes of comment header remain\n", end - p);
186 av_log(as, AV_LOG_INFO,
187 "truncated comment header, %i comments not found\n", n);
189 ff_metadata_conv(m, NULL, ff_vorbiscomment_metadata_conv);
195 * Parse the vorbis header
197 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
198 * [vorbis_version] = read 32 bits as unsigned integer | Not used
199 * [audio_channels] = read 8 bit integer as unsigned | Used
200 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
201 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
202 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
203 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
204 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
205 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
206 * [framing_flag] = read one bit | Not Used
209 struct oggvorbis_private {
211 unsigned char *packet[3];
212 AVVorbisParseContext *vp;
217 static int fixup_vorbis_headers(AVFormatContext *as,
218 struct oggvorbis_private *priv,
221 int i, offset, len, err;
224 len = priv->len[0] + priv->len[1] + priv->len[2];
225 ptr = *buf = av_mallocz(len + len / 255 + 64);
227 return AVERROR(ENOMEM);
231 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
232 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
233 for (i = 0; i < 3; i++) {
234 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
235 offset += priv->len[i];
236 av_freep(&priv->packet[i]);
238 if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0)
243 static void vorbis_cleanup(AVFormatContext *s, int idx)
245 struct ogg *ogg = s->priv_data;
246 struct ogg_stream *os = ogg->streams + idx;
247 struct oggvorbis_private *priv = os->private;
250 av_vorbis_parse_free(&priv->vp);
251 for (i = 0; i < 3; i++)
252 av_freep(&priv->packet[i]);
256 static int vorbis_header(AVFormatContext *s, int idx)
258 struct ogg *ogg = s->priv_data;
259 AVStream *st = s->streams[idx];
260 struct ogg_stream *os = ogg->streams + idx;
261 struct oggvorbis_private *priv;
262 int pkt_type = os->buf[os->pstart];
265 os->private = av_mallocz(sizeof(struct oggvorbis_private));
267 return AVERROR(ENOMEM);
273 if (os->psize < 1 || pkt_type > 5)
274 return AVERROR_INVALIDDATA;
278 if (priv->packet[pkt_type >> 1])
279 return AVERROR_INVALIDDATA;
280 if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
281 return AVERROR_INVALIDDATA;
283 priv->len[pkt_type >> 1] = os->psize;
284 priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
285 if (!priv->packet[pkt_type >> 1])
286 return AVERROR(ENOMEM);
287 memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
288 if (os->buf[os->pstart] == 1) {
289 const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
290 unsigned blocksize, bs0, bs1;
294 return AVERROR_INVALIDDATA;
296 if (bytestream_get_le32(&p) != 0) /* vorbis_version */
297 return AVERROR_INVALIDDATA;
299 st->codecpar->channels = bytestream_get_byte(&p);
300 srate = bytestream_get_le32(&p);
301 p += 4; // skip maximum bitrate
302 st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate
303 p += 4; // skip minimum bitrate
305 blocksize = bytestream_get_byte(&p);
306 bs0 = blocksize & 15;
307 bs1 = blocksize >> 4;
310 return AVERROR_INVALIDDATA;
311 if (bs0 < 6 || bs1 > 13)
312 return AVERROR_INVALIDDATA;
314 if (bytestream_get_byte(&p) != 1) /* framing_flag */
315 return AVERROR_INVALIDDATA;
317 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
318 st->codecpar->codec_id = AV_CODEC_ID_VORBIS;
321 st->codecpar->sample_rate = srate;
322 avpriv_set_pts_info(st, 64, 1, srate);
324 } else if (os->buf[os->pstart] == 3) {
326 ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
327 os->psize - 8) >= 0) {
330 int ret = ff_replaygain_export(st, st->metadata);
334 // drop all metadata we parsed and which is not required by libvorbis
335 new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
336 if (new_len >= 16 && new_len < os->psize) {
337 AV_WL32(priv->packet[1] + new_len - 5, 0);
338 priv->packet[1][new_len - 1] = 1;
339 priv->len[1] = new_len;
343 int ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata);
345 st->codecpar->extradata_size = 0;
348 st->codecpar->extradata_size = ret;
350 priv->vp = av_vorbis_parse_init(st->codecpar->extradata, st->codecpar->extradata_size);
352 av_freep(&st->codecpar->extradata);
353 st->codecpar->extradata_size = 0;
361 static int vorbis_packet(AVFormatContext *s, int idx)
363 struct ogg *ogg = s->priv_data;
364 struct ogg_stream *os = ogg->streams + idx;
365 struct oggvorbis_private *priv = os->private;
369 return AVERROR_INVALIDDATA;
371 /* first packet handling
372 * here we parse the duration of each packet in the first page and compare
373 * the total duration to the page granule to find the encoder delay and
374 * set the first timestamp */
377 uint8_t *last_pkt = os->buf + os->pstart;
378 uint8_t *next_pkt = last_pkt;
379 int first_duration = 0;
381 av_vorbis_parse_reset(priv->vp);
383 for (seg = 0; seg < os->nsegs; seg++) {
384 if (os->segments[seg] < 255) {
385 int d = av_vorbis_parse_frame(priv->vp, last_pkt, 1);
387 duration = os->granule;
393 last_pkt = next_pkt + os->segments[seg];
395 next_pkt += os->segments[seg];
398 os->lastdts = os->granule - duration;
399 s->streams[idx]->start_time = os->lastpts + first_duration;
400 if (s->streams[idx]->duration)
401 s->streams[idx]->duration -= s->streams[idx]->start_time;
402 s->streams[idx]->cur_dts = AV_NOPTS_VALUE;
403 priv->final_pts = AV_NOPTS_VALUE;
404 av_vorbis_parse_reset(priv->vp);
407 /* parse packet duration */
409 duration = av_vorbis_parse_frame(priv->vp, os->buf + os->pstart, 1);
411 os->pflags |= AV_PKT_FLAG_CORRUPT;
414 os->pduration = duration;
417 /* final packet handling
418 * here we save the pts of the first packet in the final page, sum up all
419 * packet durations in the final page except for the last one, and compare
420 * to the page granule to find the duration of the final packet */
421 if (os->flags & OGG_FLAG_EOS) {
422 if (os->lastpts != AV_NOPTS_VALUE) {
423 priv->final_pts = os->lastpts;
424 priv->final_duration = 0;
426 if (os->segp == os->nsegs)
427 os->pduration = os->granule - priv->final_pts - priv->final_duration;
428 priv->final_duration += os->pduration;
434 const struct ogg_codec ff_vorbis_codec = {
435 .magic = "\001vorbis",
437 .header = vorbis_header,
438 .packet = vorbis_packet,
439 .cleanup = vorbis_cleanup,