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oggparseogm.c
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1 /**
2  Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
3 
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:
11 
12  The above copyright notice and this permission notice shall be
13  included in all copies or substantial portions of the Software.
14 
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.
23 **/
24 
25 #include <stdlib.h>
26 #include "libavutil/avassert.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavcodec/get_bits.h"
29 #include "libavcodec/bytestream.h"
30 #include "avformat.h"
31 #include "internal.h"
32 #include "oggdec.h"
33 #include "riff.h"
34 
35 static int
37 {
38  struct ogg *ogg = s->priv_data;
39  struct ogg_stream *os = ogg->streams + idx;
40  AVStream *st = s->streams[idx];
42  uint64_t time_unit;
43  uint64_t spu;
44  uint32_t size;
45 
46  bytestream2_init(&p, os->buf + os->pstart, os->psize);
47  if (!(bytestream2_peek_byte(&p) & 1))
48  return 0;
49 
50  if (bytestream2_peek_byte(&p) == 1) {
51  bytestream2_skip(&p, 1);
52 
53  if (bytestream2_peek_byte(&p) == 'v'){
54  int tag;
56  bytestream2_skip(&p, 8);
57  tag = bytestream2_get_le32(&p);
59  st->codec->codec_tag = tag;
60  } else if (bytestream2_peek_byte(&p) == 't') {
63  bytestream2_skip(&p, 12);
64  } else {
65  uint8_t acid[5] = { 0 };
66  int cid;
68  bytestream2_skip(&p, 8);
69  bytestream2_get_buffer(&p, acid, 4);
70  acid[4] = 0;
71  cid = strtol(acid, NULL, 16);
73  // our parser completely breaks AAC in Ogg
74  if (st->codec->codec_id != AV_CODEC_ID_AAC)
76  }
77 
78  size = bytestream2_get_le32(&p);
79  size = FFMIN(size, os->psize);
80  time_unit = bytestream2_get_le64(&p);
81  spu = bytestream2_get_le64(&p);
82  if (!time_unit || !spu) {
83  av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
84  return AVERROR_INVALIDDATA;
85  }
86 
87  bytestream2_skip(&p, 4); /* default_len */
88  bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
89 
91  st->codec->width = bytestream2_get_le32(&p);
92  st->codec->height = bytestream2_get_le32(&p);
93  avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
94  } else {
95  st->codec->channels = bytestream2_get_le16(&p);
96  bytestream2_skip(&p, 2); /* block_align */
97  st->codec->bit_rate = bytestream2_get_le32(&p) * 8;
98  st->codec->sample_rate = spu * 10000000 / time_unit;
99  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
100  if (size >= 56 && st->codec->codec_id == AV_CODEC_ID_AAC) {
101  bytestream2_skip(&p, 4);
102  size -= 4;
103  }
104  if (size > 52) {
106  size -= 52;
107  ff_alloc_extradata(st->codec, size);
109  }
110  }
111  } else if (bytestream2_peek_byte(&p) == 3) {
112  bytestream2_skip(&p, 7);
113  if (bytestream2_get_bytes_left(&p) > 1)
115  }
116 
117  return 1;
118 }
119 
120 static int
122 {
123  struct ogg *ogg = s->priv_data;
124  struct ogg_stream *os = ogg->streams + idx;
125  AVStream *st = s->streams[idx];
126  uint8_t *p = os->buf + os->pstart;
127  uint32_t t;
128 
129  if(!(*p & 1))
130  return 0;
131  if(*p != 1)
132  return 1;
133 
134  if (os->psize < 100)
135  return AVERROR_INVALIDDATA;
136  t = AV_RL32(p + 96);
137 
138  if(t == 0x05589f80){
139  if (os->psize < 184)
140  return AVERROR_INVALIDDATA;
141 
144  avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
145  st->codec->width = AV_RL32(p + 176);
146  st->codec->height = AV_RL32(p + 180);
147  } else if(t == 0x05589f81){
148  if (os->psize < 136)
149  return AVERROR_INVALIDDATA;
150 
153  st->codec->channels = AV_RL16(p + 126);
154  st->codec->sample_rate = AV_RL32(p + 128);
155  st->codec->bit_rate = AV_RL32(p + 132) * 8;
156  }
157 
158  return 1;
159 }
160 
161 static int
163 {
164  struct ogg *ogg = s->priv_data;
165  struct ogg_stream *os = ogg->streams + idx;
166  uint8_t *p = os->buf + os->pstart;
167  int lb;
168 
169  if(*p & 8)
170  os->pflags |= AV_PKT_FLAG_KEY;
171 
172  lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
173  os->pstart += lb + 1;
174  os->psize -= lb + 1;
175 
176  while (lb--)
177  os->pduration += p[lb+1] << (lb*8);
178 
179  return 0;
180 }
181 
183  .magic = "\001video",
184  .magicsize = 6,
185  .header = ogm_header,
186  .packet = ogm_packet,
187  .granule_is_start = 1,
188  .nb_header = 2,
189 };
190 
192  .magic = "\001audio",
193  .magicsize = 6,
194  .header = ogm_header,
195  .packet = ogm_packet,
196  .granule_is_start = 1,
197  .nb_header = 2,
198 };
199 
200 const struct ogg_codec ff_ogm_text_codec = {
201  .magic = "\001text",
202  .magicsize = 5,
203  .header = ogm_header,
204  .packet = ogm_packet,
205  .granule_is_start = 1,
206  .nb_header = 2,
207 };
208 
209 const struct ogg_codec ff_ogm_old_codec = {
210  .magic = "\001Direct Show Samples embedded in Ogg",
211  .magicsize = 35,
212  .header = ogm_dshow_header,
213  .packet = ogm_packet,
214  .granule_is_start = 1,
215  .nb_header = 1,
216 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
const struct ogg_codec ff_ogm_old_codec
Definition: oggparseogm.c:209
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggdec.h:31
unsigned int pflags
Definition: oggdec.h:67
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2773
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4083
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
uint64_t_TMPL AV_RL64
Definition: bytestream.h:87
static int ogm_header(AVFormatContext *s, int idx)
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggparseogm.c:36
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static int ogm_dshow_header(AVFormatContext *s, int idx)
Definition: oggparseogm.c:121
Format I/O context.
Definition: avformat.h:1273
unsigned int psize
Definition: oggdec.h:66
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
const struct ogg_codec ff_ogm_text_codec
Definition: oggparseogm.c:200
enum AVStreamParseType need_parsing
Definition: avformat.h:1034
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1617
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
const uint8_t * buffer
Definition: bytestream.h:34
uint32_t tag
Definition: movenc.c:1334
bitstream reader API header.
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, const uint8_t *buf, int size)
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
simple assert() macros that are a bit more flexible than ISO C assert().
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:378
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
int bit_rate
the average bitrate
Definition: avcodec.h:1567
#define FFMIN(a, b)
Definition: common.h:81
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
int width
picture width / height.
Definition: avcodec.h:1681
unsigned int pstart
Definition: oggdec.h:65
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
struct ogg_stream * streams
Definition: oggdec.h:102
const struct ogg_codec ff_ogm_video_codec
Definition: oggparseogm.c:182
Stream structure.
Definition: avformat.h:842
enum AVMediaType codec_type
Definition: avcodec.h:1510
unsigned int pduration
Definition: oggdec.h:68
enum AVCodecID codec_id
Definition: avcodec.h:1519
int sample_rate
samples per second
Definition: avcodec.h:2262
static int ogm_packet(AVFormatContext *s, int idx)
Definition: oggparseogm.c:162
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1534
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2924
int extradata_size
Definition: avcodec.h:1618
const int8_t * magic
Definition: oggdec.h:32
uint8_t * buf
Definition: oggdec.h:62
full parsing and repack
Definition: avformat.h:774
Main libavformat public API header.
raw UTF-8 text
Definition: avcodec.h:512
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:636
Definition: oggdec.h:101
int channels
number of audio channels
Definition: avcodec.h:2263
void * priv_data
Format private data.
Definition: avformat.h:1301
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
const struct ogg_codec ff_ogm_audio_codec
Definition: oggparseogm.c:191