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));
109 av_log(as, AV_LOG_INFO, "%i bytes of comment header remain\n", size);
111 av_log(as, AV_LOG_INFO,
112 "truncated comment header, %i comments not found\n", n);
118 /** Parse the vorbis header
119 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
120 * [vorbis_version] = read 32 bits as unsigned integer | Not used
121 * [audio_channels] = read 8 bit integer as unsigned | Used
122 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
123 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
124 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
125 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
126 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
127 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
128 * [framing_flag] = read one bit | Not Used
133 unsigned char *packet[3];
134 } oggvorbis_private_t;
138 fixup_vorbis_headers(AVFormatContext * as, oggvorbis_private_t *priv,
144 len = priv->len[0] + priv->len[1] + priv->len[2];
145 ptr = *buf = av_mallocz(len + len/255 + 64);
149 offset += av_xiphlacing(&ptr[offset], priv->len[0]);
150 offset += av_xiphlacing(&ptr[offset], priv->len[1]);
151 for (i = 0; i < 3; i++) {
152 memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
153 offset += priv->len[i];
155 *buf = av_realloc(*buf, offset);
161 vorbis_header (AVFormatContext * s, int idx)
163 ogg_t *ogg = s->priv_data;
164 ogg_stream_t *os = ogg->streams + idx;
165 AVStream *st = s->streams[idx];
166 oggvorbis_private_t *priv;
172 os->private = av_mallocz(sizeof(oggvorbis_private_t));
178 priv->len[os->seq] = os->psize;
179 priv->packet[os->seq] = av_mallocz(os->psize);
180 memcpy(priv->packet[os->seq], os->buf + os->pstart, os->psize);
181 if (os->buf[os->pstart] == 1) {
182 uint8_t *p = os->buf + os->pstart + 11; //skip up to the audio channels
183 st->codec->channels = *p++;
184 st->codec->sample_rate = AV_RL32(p);
185 p += 8; //skip maximum and and nominal bitrate
186 st->codec->bit_rate = AV_RL32(p); //Minimum bitrate
188 st->codec->codec_type = CODEC_TYPE_AUDIO;
189 st->codec->codec_id = CODEC_ID_VORBIS;
191 st->time_base.num = 1;
192 st->time_base.den = st->codec->sample_rate;
193 } else if (os->buf[os->pstart] == 3) {
194 vorbis_comment (s, os->buf + os->pstart + 7, os->psize - 8);
196 st->codec->extradata_size =
197 fixup_vorbis_headers(s, priv, &st->codec->extradata);
203 ogg_codec_t vorbis_codec = {
204 .magic = "\001vorbis",
206 .header = vorbis_header