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.
26 #include "libavutil/avstring.h"
27 #include "libavutil/bswap.h"
28 #include "libavcodec/get_bits.h"
29 #include "libavcodec/bytestream.h"
33 static int ogm_chapter(AVFormatContext *as, uint8_t *key, uint8_t *val)
35 int i, cnum, h, m, s, ms, keylen = strlen(key);
36 AVChapter *chapter = NULL;
38 if (keylen < 9 || sscanf(key, "CHAPTER%02d", &cnum) != 1)
42 if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4)
45 ff_new_chapter(as, cnum, (AVRational){1,1000},
46 ms + 1000*(s + 60*(m + 60*h)),
47 AV_NOPTS_VALUE, NULL);
49 } else if (!strcmp(key+9, "NAME")) {
50 for(i = 0; i < as->nb_chapters; i++)
51 if (as->chapters[i]->id == cnum) {
52 chapter = as->chapters[i];
58 av_metadata_set2(&chapter->metadata, "title", val,
59 AV_METADATA_DONT_STRDUP_VAL);
68 ff_vorbis_comment(AVFormatContext * as, AVMetadata **m, const uint8_t *buf, int size)
70 const uint8_t *p = buf;
71 const uint8_t *end = buf + size;
75 if (size < 8) /* must have vendor_length and user_comment_list_length */
78 s = bytestream_get_le32(&p);
80 if (end - p - 4 < s || s < 0)
85 n = bytestream_get_le32(&p);
87 while (end - p >= 4 && n > 0) {
91 s = bytestream_get_le32(&p);
93 if (end - p < s || s < 0)
100 v = memchr(t, '=', s);
111 tt = av_malloc(tl + 1);
112 ct = av_malloc(vl + 1);
116 av_log(as, AV_LOG_WARNING, "out-of-memory error. skipping VorbisComment tag.\n");
120 for (j = 0; j < tl; j++)
121 tt[j] = toupper(t[j]);
127 if (!ogm_chapter(as, tt, ct))
128 av_metadata_set2(m, tt, ct,
129 AV_METADATA_DONT_STRDUP_KEY |
130 AV_METADATA_DONT_STRDUP_VAL);
135 av_log(as, AV_LOG_INFO, "%ti bytes of comment header remain\n", end-p);
137 av_log(as, AV_LOG_INFO,
138 "truncated comment header, %i comments not found\n", n);
144 /** Parse the vorbis header
145 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
146 * [vorbis_version] = read 32 bits as unsigned integer | Not used
147 * [audio_channels] = read 8 bit integer as unsigned | Used
148 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
149 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
150 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
151 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
152 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
153 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
154 * [framing_flag] = read one bit | Not Used
157 struct oggvorbis_private {
159 unsigned char *packet[3];
164 fixup_vorbis_headers(AVFormatContext * as, struct oggvorbis_private *priv,
170 len = priv->len[0] + priv->len[1] + priv->len[2];
171 ptr = *buf = av_mallocz(len + len/255 + 64);
175 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
176 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
177 for (i = 0; i < 3; i++) {
178 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
179 offset += priv->len[i];
180 av_freep(&priv->packet[i]);
182 *buf = av_realloc(*buf, offset + FF_INPUT_BUFFER_PADDING_SIZE);
188 vorbis_header (AVFormatContext * s, int idx)
190 struct ogg *ogg = s->priv_data;
191 struct ogg_stream *os = ogg->streams + idx;
192 AVStream *st = s->streams[idx];
193 struct oggvorbis_private *priv;
194 int pkt_type = os->buf[os->pstart];
200 os->private = av_mallocz(sizeof(struct oggvorbis_private));
205 if (os->psize < 1 || pkt_type > 5)
209 priv->len[pkt_type >> 1] = os->psize;
210 priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
211 memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
212 if (os->buf[os->pstart] == 1) {
213 const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
214 unsigned blocksize, bs0, bs1;
219 if (bytestream_get_le32(&p) != 0) /* vorbis_version */
222 st->codec->channels = bytestream_get_byte(&p);
223 st->codec->sample_rate = bytestream_get_le32(&p);
224 p += 4; // skip maximum bitrate
225 st->codec->bit_rate = bytestream_get_le32(&p); // nominal bitrate
226 p += 4; // skip minimum bitrate
228 blocksize = bytestream_get_byte(&p);
229 bs0 = blocksize & 15;
230 bs1 = blocksize >> 4;
234 if (bs0 < 6 || bs1 > 13)
237 if (bytestream_get_byte(&p) != 1) /* framing_flag */
240 st->codec->codec_type = CODEC_TYPE_AUDIO;
241 st->codec->codec_id = CODEC_ID_VORBIS;
243 st->time_base.num = 1;
244 st->time_base.den = st->codec->sample_rate;
245 } else if (os->buf[os->pstart] == 3) {
247 ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 7, os->psize - 8);
249 st->codec->extradata_size =
250 fixup_vorbis_headers(s, priv, &st->codec->extradata);
256 const struct ogg_codec ff_vorbis_codec = {
257 .magic = "\001vorbis",
259 .header = vorbis_header