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"
34 * VorbisComment metadata conversion mapping.
35 * from Ogg Vorbis I format specification: comment field and header specification
36 * http://xiph.org/vorbis/doc/v-comment.html
38 const AVMetadataConv ff_vorbiscomment_metadata_conv
[] = {
39 { "ARTIST" , "author" },
40 { "TITLE" , "title" },
41 { "ALBUM" , "album" },
43 { "TRACKNUMBER", "track" },
44 { "GENRE" , "genre" },
49 vorbis_comment(AVFormatContext
* as
, uint8_t *buf
, int size
)
51 const uint8_t *p
= buf
;
52 const uint8_t *end
= buf
+ size
;
56 if (size
< 8) /* must have vendor_length and user_comment_list_length */
59 s
= bytestream_get_le32(&p
);
61 if (end
- p
- 4 < s
|| s
< 0)
66 n
= bytestream_get_le32(&p
);
68 while (end
- p
>= 4 && n
> 0) {
72 s
= bytestream_get_le32(&p
);
74 if (end
- p
< s
|| s
< 0)
81 v
= memchr(t
, '=', s
);
92 tt
= av_malloc(tl
+ 1);
93 ct
= av_malloc(vl
+ 1);
97 av_log(as
, AV_LOG_WARNING
, "out-of-memory error. skipping VorbisComment tag.\n");
101 for (j
= 0; j
< tl
; j
++)
102 tt
[j
] = toupper(t
[j
]);
108 av_metadata_set(&as
->metadata
, tt
, ct
);
116 av_log(as
, AV_LOG_INFO
, "%ti bytes of comment header remain\n", end
-p
);
118 av_log(as
, AV_LOG_INFO
,
119 "truncated comment header, %i comments not found\n", n
);
125 /** Parse the vorbis header
126 * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
127 * [vorbis_version] = read 32 bits as unsigned integer | Not used
128 * [audio_channels] = read 8 bit integer as unsigned | Used
129 * [audio_sample_rate] = read 32 bits as unsigned integer | Used
130 * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
131 * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
132 * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
133 * [blocksize_0] = read 4 bits as unsigned integer | Not Used
134 * [blocksize_1] = read 4 bits as unsigned integer | Not Used
135 * [framing_flag] = read one bit | Not Used
138 struct oggvorbis_private
{
140 unsigned char *packet
[3];
145 fixup_vorbis_headers(AVFormatContext
* as
, struct oggvorbis_private
*priv
,
151 len
= priv
->len
[0] + priv
->len
[1] + priv
->len
[2];
152 ptr
= *buf
= av_mallocz(len
+ len
/255 + 64);
156 offset
+= av_xiphlacing(&ptr
[offset
], priv
->len
[0]);
157 offset
+= av_xiphlacing(&ptr
[offset
], priv
->len
[1]);
158 for (i
= 0; i
< 3; i
++) {
159 memcpy(&ptr
[offset
], priv
->packet
[i
], priv
->len
[i
]);
160 offset
+= priv
->len
[i
];
162 *buf
= av_realloc(*buf
, offset
+ FF_INPUT_BUFFER_PADDING_SIZE
);
168 vorbis_header (AVFormatContext
* s
, int idx
)
170 struct ogg
*ogg
= s
->priv_data
;
171 struct ogg_stream
*os
= ogg
->streams
+ idx
;
172 AVStream
*st
= s
->streams
[idx
];
173 struct oggvorbis_private
*priv
;
179 os
->private = av_mallocz(sizeof(struct oggvorbis_private
));
188 priv
->len
[os
->seq
] = os
->psize
;
189 priv
->packet
[os
->seq
] = av_mallocz(os
->psize
);
190 memcpy(priv
->packet
[os
->seq
], os
->buf
+ os
->pstart
, os
->psize
);
191 if (os
->buf
[os
->pstart
] == 1) {
192 const uint8_t *p
= os
->buf
+ os
->pstart
+ 7; /* skip "\001vorbis" tag */
193 unsigned blocksize
, bs0
, bs1
;
198 if (bytestream_get_le32(&p
) != 0) /* vorbis_version */
201 st
->codec
->channels
= bytestream_get_byte(&p
);
202 st
->codec
->sample_rate
= bytestream_get_le32(&p
);
203 p
+= 4; // skip maximum bitrate
204 st
->codec
->bit_rate
= bytestream_get_le32(&p
); // nominal bitrate
205 p
+= 4; // skip minimum bitrate
207 blocksize
= bytestream_get_byte(&p
);
208 bs0
= blocksize
& 15;
209 bs1
= blocksize
>> 4;
213 if (bs0
< 6 || bs1
> 13)
216 if (bytestream_get_byte(&p
) != 1) /* framing_flag */
219 st
->codec
->codec_type
= CODEC_TYPE_AUDIO
;
220 st
->codec
->codec_id
= CODEC_ID_VORBIS
;
222 st
->time_base
.num
= 1;
223 st
->time_base
.den
= st
->codec
->sample_rate
;
224 } else if (os
->buf
[os
->pstart
] == 3) {
226 vorbis_comment (s
, os
->buf
+ os
->pstart
+ 7, os
->psize
- 8);
228 st
->codec
->extradata_size
=
229 fixup_vorbis_headers(s
, priv
, &st
->codec
->extradata
);
235 const struct ogg_codec ff_vorbis_codec
= {
236 .magic
= "\001vorbis",
238 .header
= vorbis_header