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"
32 #include "vorbiscomment.h"
34 static int ogm_chapter(AVFormatContext *as, uint8_t *key, uint8_t *val)
36 int i, cnum, h, m, s, ms, keylen = strlen(key);
37 AVChapter *chapter = NULL;
39 if (keylen < 9 || sscanf(key, "CHAPTER%02d", &cnum) != 1)
43 if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4)
46 ff_new_chapter(as, cnum, (AVRational){1,1000},
47 ms + 1000*(s + 60*(m + 60*h)),
48 AV_NOPTS_VALUE, NULL);
50 } else if (!strcmp(key+9, "NAME")) {
51 for(i = 0; i < as->nb_chapters; i++)
52 if (as->chapters[i]->id == cnum) {
53 chapter = as->chapters[i];
59 av_metadata_set2(&chapter->metadata, "title", val,
60 AV_METADATA_DONT_STRDUP_VAL);
69 ff_vorbis_comment(AVFormatContext * as, AVMetadata **m, const uint8_t *buf, int size)
71 const uint8_t *p = buf;
72 const uint8_t *end = buf + size;
76 if (size < 8) /* must have vendor_length and user_comment_list_length */
79 s = bytestream_get_le32(&p);
81 if (end - p - 4 < s || s < 0)
86 n = bytestream_get_le32(&p);
88 while (end - p >= 4 && n > 0) {
92 s = bytestream_get_le32(&p);
94 if (end - p < s || s < 0)
101 v = memchr(t, '=', s);
112 tt = av_malloc(tl + 1);
113 ct = av_malloc(vl + 1);
117 av_log(as, AV_LOG_WARNING, "out-of-memory error. skipping VorbisComment tag.\n");
121 for (j = 0; j < tl; j++)
122 tt[j] = toupper(t[j]);
128 if (!ogm_chapter(as, tt, ct))
129 av_metadata_set2(m, tt, ct,
130 AV_METADATA_DONT_STRDUP_KEY |
131 AV_METADATA_DONT_STRDUP_VAL);
136 av_log(as, AV_LOG_INFO, "%ti bytes of comment header remain\n", end-p);
138 av_log(as, AV_LOG_INFO,
139 "truncated comment header, %i comments not found\n", n);
141 ff_metadata_conv(m, NULL, ff_vorbiscomment_metadata_conv);
147 /** Parse the vorbis header
148 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
149 * [vorbis_version] = read 32 bits as unsigned integer | Not used
150 * [audio_channels] = read 8 bit integer as unsigned | Used
151 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
152 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
153 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
154 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
155 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
156 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
157 * [framing_flag] = read one bit | Not Used
160 struct oggvorbis_private {
162 unsigned char *packet[3];
167 fixup_vorbis_headers(AVFormatContext * as, struct oggvorbis_private *priv,
173 len = priv->len[0] + priv->len[1] + priv->len[2];
174 ptr = *buf = av_mallocz(len + len/255 + 64);
178 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
179 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
180 for (i = 0; i < 3; i++) {
181 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
182 offset += priv->len[i];
183 av_freep(&priv->packet[i]);
185 *buf = av_realloc(*buf, offset + FF_INPUT_BUFFER_PADDING_SIZE);
191 vorbis_header (AVFormatContext * s, int idx)
193 struct ogg *ogg = s->priv_data;
194 struct ogg_stream *os = ogg->streams + idx;
195 AVStream *st = s->streams[idx];
196 struct oggvorbis_private *priv;
197 int pkt_type = os->buf[os->pstart];
203 os->private = av_mallocz(sizeof(struct oggvorbis_private));
208 if (os->psize < 1 || pkt_type > 5)
213 if (priv->packet[pkt_type>>1])
215 if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
218 priv->len[pkt_type >> 1] = os->psize;
219 priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
220 memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
221 if (os->buf[os->pstart] == 1) {
222 const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
223 unsigned blocksize, bs0, bs1;
228 if (bytestream_get_le32(&p) != 0) /* vorbis_version */
231 st->codec->channels = bytestream_get_byte(&p);
232 st->codec->sample_rate = bytestream_get_le32(&p);
233 p += 4; // skip maximum bitrate
234 st->codec->bit_rate = bytestream_get_le32(&p); // nominal bitrate
235 p += 4; // skip minimum bitrate
237 blocksize = bytestream_get_byte(&p);
238 bs0 = blocksize & 15;
239 bs1 = blocksize >> 4;
243 if (bs0 < 6 || bs1 > 13)
246 if (bytestream_get_byte(&p) != 1) /* framing_flag */
249 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
250 st->codec->codec_id = CODEC_ID_VORBIS;
252 st->time_base.num = 1;
253 st->time_base.den = st->codec->sample_rate;
254 } else if (os->buf[os->pstart] == 3) {
256 ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 7, os->psize - 8);
258 st->codec->extradata_size =
259 fixup_vorbis_headers(s, priv, &st->codec->extradata);
265 const struct ogg_codec ff_vorbis_codec = {
266 .magic = "\001vorbis",
268 .header = vorbis_header