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 "bitstream.h"
33 vorbis_comment(AVFormatContext * as, uint8_t *buf, int size)
71 v = memchr(t, '=', s);
83 for (j = 0; j < tl; j++)
84 tt[j] = toupper(t[j]);
90 // took from Vorbis_I_spec
91 if (!strcmp(tt, "AUTHOR") || !strcmp(tt, "ARTIST"))
92 av_strlcpy(as->author, ct, sizeof(as->author));
93 else if (!strcmp(tt, "TITLE"))
94 av_strlcpy(as->title, ct, sizeof(as->title));
95 else if (!strcmp(tt, "COPYRIGHT"))
96 av_strlcpy(as->copyright, ct, sizeof(as->copyright));
97 else if (!strcmp(tt, "DESCRIPTION"))
98 av_strlcpy(as->comment, ct, sizeof(as->comment));
99 else if (!strcmp(tt, "GENRE"))
100 av_strlcpy(as->genre, ct, sizeof(as->genre));
101 else if (!strcmp(tt, "TRACKNUMBER"))
102 as->track = atoi(ct);
103 else if (!strcmp(tt, "ALBUM"))
104 av_strlcpy(as->album, ct, sizeof(as->album));
105 else if (!strcmp(tt, "GENRE"))
106 av_strlcpy(as->genre, ct, sizeof(as->genre));
107 else if (!strcmp(tt, "DESCRIPTION"))
108 av_strlcpy(as->comment, ct, sizeof(as->comment));
113 av_log(as, AV_LOG_INFO, "%i bytes of comment header remain\n", size);
115 av_log(as, AV_LOG_INFO,
116 "truncated comment header, %i comments not found\n", n);
122 /** Parse the vorbis header
123 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
124 * [vorbis_version] = read 32 bits as unsigned integer | Not used
125 * [audio_channels] = read 8 bit integer as unsigned | Used
126 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
127 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
128 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
129 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
130 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
131 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
132 * [framing_flag] = read one bit | Not Used
137 unsigned char *packet[3];
138 } oggvorbis_private_t;
142 fixup_vorbis_headers(AVFormatContext * as, oggvorbis_private_t *priv,
148 len = priv->len[0] + priv->len[1] + priv->len[2];
149 ptr = *buf = av_mallocz(len + len/255 + 64);
153 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
154 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
155 for (i = 0; i < 3; i++) {
156 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
157 offset += priv->len[i];
159 *buf = av_realloc(*buf, offset);
165 vorbis_header (AVFormatContext * s, int idx)
167 ogg_t *ogg = s->priv_data;
168 ogg_stream_t *os = ogg->streams + idx;
169 AVStream *st = s->streams[idx];
170 oggvorbis_private_t *priv;
176 os->private = av_mallocz(sizeof(oggvorbis_private_t));
182 priv->len[os->seq] = os->psize;
183 priv->packet[os->seq] = av_mallocz(os->psize);
184 memcpy(priv->packet[os->seq], os->buf + os->pstart, os->psize);
185 if (os->buf[os->pstart] == 1) {
186 uint8_t *p = os->buf + os->pstart + 11; //skip up to the audio channels
187 st->codec->channels = *p++;
188 st->codec->sample_rate = AV_RL32(p);
189 p += 8; //skip maximum and and nominal bitrate
190 st->codec->bit_rate = AV_RL32(p); //Minimum bitrate
192 st->codec->codec_type = CODEC_TYPE_AUDIO;
193 st->codec->codec_id = CODEC_ID_VORBIS;
195 st->time_base.num = 1;
196 st->time_base.den = st->codec->sample_rate;
197 } else if (os->buf[os->pstart] == 3) {
198 vorbis_comment (s, os->buf + os->pstart + 7, os->psize - 8);
200 st->codec->extradata_size =
201 fixup_vorbis_headers(s, priv, &st->codec->extradata);
207 ogg_codec_t vorbis_codec = {
208 .magic = "\001vorbis",
210 .header = vorbis_header