oggparsevorbis: fail on memory allocation error
[libav.git] / libavformat / oggparsevorbis.c
CommitLineData
49fe9c05
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1/*
2 * Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
3 *
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:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
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.
23 */
9146ca37
MR
24
25#include <stdlib.h>
49fe9c05 26
245976da 27#include "libavutil/avstring.h"
c18375ec 28#include "libavutil/base64.h"
245976da 29#include "libavutil/bswap.h"
d2d67e42 30#include "libavutil/dict.h"
245976da 31#include "libavcodec/bytestream.h"
49fe9c05 32#include "libavcodec/get_bits.h"
f63412fc 33#include "libavcodec/vorbis_parser.h"
9146ca37 34#include "avformat.h"
c18375ec 35#include "flac_picture.h"
19711af5 36#include "internal.h"
a0ddef24 37#include "oggdec.h"
fb66c31d 38#include "vorbiscomment.h"
9146ca37 39
8730fad5
DC
40static int ogm_chapter(AVFormatContext *as, uint8_t *key, uint8_t *val)
41{
42 int i, cnum, h, m, s, ms, keylen = strlen(key);
43 AVChapter *chapter = NULL;
44
9c15ef35 45 if (keylen < 9 || sscanf(key, "CHAPTER%03d", &cnum) != 1)
8730fad5
DC
46 return 0;
47
9c15ef35 48 if (keylen <= 10) {
8730fad5
DC
49 if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4)
50 return 0;
51
49fe9c05
VG
52 avpriv_new_chapter(as, cnum, (AVRational) { 1, 1000 },
53 ms + 1000 * (s + 60 * (m + 60 * h)),
54 AV_NOPTS_VALUE, NULL);
8730fad5 55 av_free(val);
9c15ef35 56 } else if (!strcmp(key + keylen - 4, "NAME")) {
49fe9c05 57 for (i = 0; i < as->nb_chapters; i++)
8730fad5
DC
58 if (as->chapters[i]->id == cnum) {
59 chapter = as->chapters[i];
60 break;
61 }
62 if (!chapter)
63 return 0;
64
49fe9c05 65 av_dict_set(&chapter->metadata, "title", val, AV_DICT_DONT_STRDUP_VAL);
8730fad5
DC
66 } else
67 return 0;
68
69 av_free(key);
70 return 1;
71}
72
49fe9c05
VG
73int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m,
74 const uint8_t *buf, int size)
9146ca37 75{
49fe9c05 76 const uint8_t *p = buf;
47a0513b 77 const uint8_t *end = buf + size;
98422c44
RD
78 unsigned n, j;
79 int s;
9146ca37 80
49fe9c05
VG
81 /* must have vendor_length and user_comment_list_length */
82 if (size < 8)
90e15e34 83 return AVERROR_INVALIDDATA;
9146ca37 84
0a770ae7 85 s = bytestream_get_le32(&p);
9146ca37 86
98422c44 87 if (end - p - 4 < s || s < 0)
90e15e34 88 return AVERROR_INVALIDDATA;
9146ca37
MR
89
90 p += s;
9146ca37 91
0a770ae7 92 n = bytestream_get_le32(&p);
9146ca37 93
98422c44 94 while (end - p >= 4 && n > 0) {
47a0513b 95 const char *t, *v;
9146ca37
MR
96 int tl, vl;
97
0a770ae7 98 s = bytestream_get_le32(&p);
9146ca37 99
98422c44 100 if (end - p < s || s < 0)
9146ca37
MR
101 break;
102
49fe9c05 103 t = p;
9146ca37 104 p += s;
9146ca37
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105 n--;
106
4bd684bc 107 v = memchr(t, '=', s);
9146ca37
MR
108 if (!v)
109 continue;
110
111 tl = v - t;
112 vl = s - tl - 1;
113 v++;
114
4bd684bc 115 if (tl && vl) {
e3b44649
JR
116 char *tt, *ct;
117
118 tt = av_malloc(tl + 1);
119 ct = av_malloc(vl + 1);
120 if (!tt || !ct) {
121 av_freep(&tt);
122 av_freep(&ct);
fd2384f0 123 return AVERROR(ENOMEM);
e3b44649 124 }
9146ca37
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125
126 for (j = 0; j < tl; j++)
efa7f420 127 tt[j] = av_toupper(t[j]);
9146ca37
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128 tt[tl] = 0;
129
4bd684bc 130 memcpy(ct, v, vl);
9146ca37
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131 ct[vl] = 0;
132
c18375ec
JA
133 /* The format in which the pictures are stored is the FLAC format.
134 * Xiph says: "The binary FLAC picture structure is base64 encoded
135 * and placed within a VorbisComment with the tag name
136 * 'METADATA_BLOCK_PICTURE'. This is the preferred and
137 * recommended way of embedding cover art within VorbisComments."
138 */
139 if (!strcmp(tt, "METADATA_BLOCK_PICTURE")) {
140 int ret;
141 char *pict = av_malloc(vl);
142
143 if (!pict) {
144 av_freep(&tt);
145 av_freep(&ct);
146 return AVERROR(ENOMEM);
147 }
148 if ((ret = av_base64_decode(pict, ct, vl)) > 0)
149 ret = ff_flac_parse_picture(as, pict, ret);
150 av_freep(&tt);
151 av_freep(&ct);
152 av_freep(&pict);
153 if (ret < 0) {
154 av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
155 continue;
156 }
157 } else if (!ogm_chapter(as, tt, ct))
d2d67e42 158 av_dict_set(m, tt, ct,
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159 AV_DICT_DONT_STRDUP_KEY |
160 AV_DICT_DONT_STRDUP_VAL);
9146ca37
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161 }
162 }
163
972c5f9e 164 if (p != end)
49fe9c05
VG
165 av_log(as, AV_LOG_INFO,
166 "%ti bytes of comment header remain\n", end - p);
9146ca37 167 if (n > 0)
4bd684bc
MR
168 av_log(as, AV_LOG_INFO,
169 "truncated comment header, %i comments not found\n", n);
9146ca37 170
ad7768f4 171 ff_metadata_conv(m, NULL, ff_vorbiscomment_metadata_conv);
03700d39 172
9146ca37
MR
173 return 0;
174}
175
49fe9c05
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176/*
177 * Parse the vorbis header
178 *
9146ca37
MR
179 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
180 * [vorbis_version] = read 32 bits as unsigned integer | Not used
181 * [audio_channels] = read 8 bit integer as unsigned | Used
115329f1 182 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
9146ca37
MR
183 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
184 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
185 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
186 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
187 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
188 * [framing_flag] = read one bit | Not Used
49fe9c05 189 */
9146ca37 190
77be08ee 191struct oggvorbis_private {
ad2b531d
MR
192 unsigned int len[3];
193 unsigned char *packet[3];
f63412fc
JR
194 VorbisParseContext vp;
195 int64_t final_pts;
196 int final_duration;
77be08ee 197};
ad2b531d 198
ed9245db
VG
199static int fixup_vorbis_headers(AVFormatContext *as,
200 struct oggvorbis_private *priv,
201 uint8_t **buf)
ad2b531d 202{
5626f994 203 int i, offset, len, err;
ad2b531d
MR
204 unsigned char *ptr;
205
206 len = priv->len[0] + priv->len[1] + priv->len[2];
49fe9c05 207 ptr = *buf = av_mallocz(len + len / 255 + 64);
ed9245db
VG
208 if (!ptr)
209 return AVERROR(ENOMEM);
ad2b531d 210
49fe9c05
VG
211 ptr[0] = 2;
212 offset = 1;
ad2b531d
MR
213 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
214 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
4bd684bc 215 for (i = 0; i < 3; i++) {
ad2b531d
MR
216 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
217 offset += priv->len[i];
2ac41150 218 av_freep(&priv->packet[i]);
ad2b531d 219 }
5626f994
AK
220 if ((err = av_reallocp(buf, offset + FF_INPUT_BUFFER_PADDING_SIZE)) < 0)
221 return err;
ad2b531d
MR
222 return offset;
223}
224
fba8e5b6 225static void vorbis_cleanup(AVFormatContext *s, int idx)
d894f747
LB
226{
227 struct ogg *ogg = s->priv_data;
228 struct ogg_stream *os = ogg->streams + idx;
229 struct oggvorbis_private *priv = os->private;
230 int i;
231 if (os->private)
232 for (i = 0; i < 3; i++)
233 av_freep(&priv->packet[i]);
234}
ad2b531d 235
49fe9c05 236static int vorbis_header(AVFormatContext *s, int idx)
9146ca37 237{
77be08ee 238 struct ogg *ogg = s->priv_data;
49fe9c05 239 AVStream *st = s->streams[idx];
77be08ee 240 struct ogg_stream *os = ogg->streams + idx;
77be08ee 241 struct oggvorbis_private *priv;
8f8320d7 242 int pkt_type = os->buf[os->pstart];
9146ca37 243
8f8320d7 244 if (!os->private) {
77be08ee 245 os->private = av_mallocz(sizeof(struct oggvorbis_private));
4bd684bc 246 if (!os->private)
90e15e34 247 return AVERROR(ENOMEM);
ad2b531d 248 }
9146ca37 249
3562684d
LB
250 if (!(pkt_type & 1))
251 return 0;
252
8f8320d7 253 if (os->psize < 1 || pkt_type > 5)
90e15e34 254 return AVERROR_INVALIDDATA;
f5475e1b 255
ad2b531d 256 priv = os->private;
73c44cb2 257
49fe9c05 258 if (priv->packet[pkt_type >> 1])
90e15e34 259 return AVERROR_INVALIDDATA;
73c44cb2 260 if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
90e15e34 261 return AVERROR_INVALIDDATA;
73c44cb2 262
49fe9c05 263 priv->len[pkt_type >> 1] = os->psize;
8f8320d7 264 priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
ed9245db
VG
265 if (!priv->packet[pkt_type >> 1])
266 return AVERROR(ENOMEM);
8f8320d7 267 memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
9146ca37 268 if (os->buf[os->pstart] == 1) {
47a0513b 269 const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
736e63ed 270 unsigned blocksize, bs0, bs1;
ce20edb7 271 int srate;
f5475e1b
MR
272
273 if (os->psize != 30)
90e15e34 274 return AVERROR_INVALIDDATA;
f5475e1b 275
736e63ed 276 if (bytestream_get_le32(&p) != 0) /* vorbis_version */
90e15e34 277 return AVERROR_INVALIDDATA;
736e63ed 278
739587bf 279 st->codec->channels = bytestream_get_byte(&p);
49fe9c05 280 srate = bytestream_get_le32(&p);
739587bf
MR
281 p += 4; // skip maximum bitrate
282 st->codec->bit_rate = bytestream_get_le32(&p); // nominal bitrate
736e63ed
MR
283 p += 4; // skip minimum bitrate
284
285 blocksize = bytestream_get_byte(&p);
49fe9c05
VG
286 bs0 = blocksize & 15;
287 bs1 = blocksize >> 4;
736e63ed
MR
288
289 if (bs0 > bs1)
90e15e34 290 return AVERROR_INVALIDDATA;
736e63ed 291 if (bs0 < 6 || bs1 > 13)
90e15e34 292 return AVERROR_INVALIDDATA;
736e63ed
MR
293
294 if (bytestream_get_byte(&p) != 1) /* framing_flag */
90e15e34 295 return AVERROR_INVALIDDATA;
9146ca37 296
72415b2a 297 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
49fe9c05 298 st->codec->codec_id = AV_CODEC_ID_VORBIS;
9146ca37 299
ce20edb7
RD
300 if (srate > 0) {
301 st->codec->sample_rate = srate;
c3f9ebf7 302 avpriv_set_pts_info(st, 64, 1, srate);
ce20edb7 303 }
9146ca37 304 } else if (os->buf[os->pstart] == 3) {
8cb3c557 305 if (os->psize > 8 &&
49fe9c05
VG
306 ff_vorbis_comment(s, &st->metadata, os->buf + os->pstart + 7,
307 os->psize - 8) >= 0) {
8cb3c557
RD
308 // drop all metadata we parsed and which is not required by libvorbis
309 unsigned new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
310 if (new_len >= 16 && new_len < os->psize) {
311 AV_WL32(priv->packet[1] + new_len - 5, 0);
312 priv->packet[1][new_len - 1] = 1;
49fe9c05 313 priv->len[1] = new_len;
8cb3c557
RD
314 }
315 }
ad2b531d 316 } else {
d872fb0f
MS
317 int ret = fixup_vorbis_headers(s, priv, &st->codec->extradata);
318 if (ret < 0) {
319 st->codec->extradata_size = 0;
320 return ret;
321 }
322 st->codec->extradata_size = ret;
f63412fc
JR
323 if ((ret = avpriv_vorbis_parse_extradata(st->codec, &priv->vp))) {
324 av_freep(&st->codec->extradata);
325 st->codec->extradata_size = 0;
326 return ret;
327 }
9146ca37
MR
328 }
329
8f8320d7 330 return 1;
9146ca37
MR
331}
332
f63412fc
JR
333static int vorbis_packet(AVFormatContext *s, int idx)
334{
335 struct ogg *ogg = s->priv_data;
336 struct ogg_stream *os = ogg->streams + idx;
337 struct oggvorbis_private *priv = os->private;
338 int duration;
339
340 /* first packet handling
49fe9c05
VG
341 * here we parse the duration of each packet in the first page and compare
342 * the total duration to the page granule to find the encoder delay and
343 * set the first timestamp */
f63412fc
JR
344 if (!os->lastpts) {
345 int seg;
49fe9c05
VG
346 uint8_t *last_pkt = os->buf + os->pstart;
347 uint8_t *next_pkt = last_pkt;
f63412fc
JR
348 int first_duration = 0;
349
350 avpriv_vorbis_parse_reset(&priv->vp);
351 duration = 0;
352 for (seg = 0; seg < os->nsegs; seg++) {
353 if (os->segments[seg] < 255) {
354 int d = avpriv_vorbis_parse_frame(&priv->vp, last_pkt, 1);
355 if (d < 0) {
356 duration = os->granule;
357 break;
358 }
359 if (!duration)
360 first_duration = d;
361 duration += d;
49fe9c05 362 last_pkt = next_pkt + os->segments[seg];
f63412fc
JR
363 }
364 next_pkt += os->segments[seg];
365 }
49fe9c05
VG
366 os->lastpts =
367 os->lastdts = os->granule - duration;
f63412fc
JR
368 s->streams[idx]->start_time = os->lastpts + first_duration;
369 if (s->streams[idx]->duration)
370 s->streams[idx]->duration -= s->streams[idx]->start_time;
49fe9c05
VG
371 s->streams[idx]->cur_dts = AV_NOPTS_VALUE;
372 priv->final_pts = AV_NOPTS_VALUE;
f63412fc
JR
373 avpriv_vorbis_parse_reset(&priv->vp);
374 }
375
376 /* parse packet duration */
377 if (os->psize > 0) {
378 duration = avpriv_vorbis_parse_frame(&priv->vp, os->buf + os->pstart, 1);
379 if (duration <= 0) {
380 os->pflags |= AV_PKT_FLAG_CORRUPT;
381 return 0;
382 }
383 os->pduration = duration;
384 }
385
386 /* final packet handling
49fe9c05
VG
387 * here we save the pts of the first packet in the final page, sum up all
388 * packet durations in the final page except for the last one, and compare
389 * to the page granule to find the duration of the final packet */
f63412fc
JR
390 if (os->flags & OGG_FLAG_EOS) {
391 if (os->lastpts != AV_NOPTS_VALUE) {
49fe9c05 392 priv->final_pts = os->lastpts;
f63412fc
JR
393 priv->final_duration = 0;
394 }
395 if (os->segp == os->nsegs)
396 os->pduration = os->granule - priv->final_pts - priv->final_duration;
397 priv->final_duration += os->pduration;
398 }
399
400 return 0;
401}
402
77be08ee 403const struct ogg_codec ff_vorbis_codec = {
49fe9c05 404 .magic = "\001vorbis",
9146ca37 405 .magicsize = 7,
49fe9c05
VG
406 .header = vorbis_header,
407 .packet = vorbis_packet,
408 .cleanup = vorbis_cleanup,
7751e469 409 .nb_header = 3,
9146ca37 410};