2
Copyright (C) 2005 Michael Ahlberg, MƄns RullgƄrd
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 = AVMEDIA_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