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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->codecpar->codec_tag = tag;
62  } else if (bytestream2_peek_byte(&p) == 't') {
65  bytestream2_skip(&p, 12);
66  } else {
67  uint8_t acid[5] = { 0 };
68  int cid;
70  bytestream2_skip(&p, 8);
71  bytestream2_get_buffer(&p, acid, 4);
72  acid[4] = 0;
73  cid = strtol(acid, NULL, 16);
75  // our parser completely breaks AAC in Ogg
76  if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
78  }
79 
80  size = bytestream2_get_le32(&p);
81  size = FFMIN(size, os->psize);
82  time_unit = bytestream2_get_le64(&p);
83  spu = bytestream2_get_le64(&p);
84  if (!time_unit || !spu) {
85  av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
86  return AVERROR_INVALIDDATA;
87  }
88 
89  bytestream2_skip(&p, 4); /* default_len */
90  bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
91 
93  st->codecpar->width = bytestream2_get_le32(&p);
94  st->codecpar->height = bytestream2_get_le32(&p);
95  avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
96  } else {
97  st->codecpar->channels = bytestream2_get_le16(&p);
98  bytestream2_skip(&p, 2); /* block_align */
99  st->codecpar->bit_rate = bytestream2_get_le32(&p) * 8;
100  st->codecpar->sample_rate = spu * 10000000 / time_unit;
101  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
102  if (size >= 56 && st->codecpar->codec_id == AV_CODEC_ID_AAC) {
103  bytestream2_skip(&p, 4);
104  size -= 4;
105  }
106  if (size > 52) {
108  size -= 52;
109  ff_alloc_extradata(st->codecpar, size);
111  }
112  }
113  } else if (bytestream2_peek_byte(&p) == 3) {
114  bytestream2_skip(&p, 7);
115  if (bytestream2_get_bytes_left(&p) > 1)
117  }
118 
119  return 1;
120 }
121 
122 static int
124 {
125  struct ogg *ogg = s->priv_data;
126  struct ogg_stream *os = ogg->streams + idx;
127  AVStream *st = s->streams[idx];
128  uint8_t *p = os->buf + os->pstart;
129  uint32_t t;
130 
131  if(!(*p & 1))
132  return 0;
133  if(*p != 1)
134  return 1;
135 
136  if (os->psize < 100)
137  return AVERROR_INVALIDDATA;
138  t = AV_RL32(p + 96);
139 
140  if(t == 0x05589f80){
141  if (os->psize < 184)
142  return AVERROR_INVALIDDATA;
143 
146  avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
147  st->codecpar->width = AV_RL32(p + 176);
148  st->codecpar->height = AV_RL32(p + 180);
149  } else if(t == 0x05589f81){
150  if (os->psize < 136)
151  return AVERROR_INVALIDDATA;
152 
155  st->codecpar->channels = AV_RL16(p + 126);
156  st->codecpar->sample_rate = AV_RL32(p + 128);
157  st->codecpar->bit_rate = AV_RL32(p + 132) * 8;
158  }
159 
160  return 1;
161 }
162 
163 static int
165 {
166  struct ogg *ogg = s->priv_data;
167  struct ogg_stream *os = ogg->streams + idx;
168  uint8_t *p = os->buf + os->pstart;
169  int lb;
170 
171  if(*p & 8)
172  os->pflags |= AV_PKT_FLAG_KEY;
173 
174  lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
175  os->pstart += lb + 1;
176  os->psize -= lb + 1;
177 
178  while (lb--)
179  os->pduration += p[lb+1] << (lb*8);
180 
181  return 0;
182 }
183 
185  .magic = "\001video",
186  .magicsize = 6,
187  .header = ogm_header,
188  .packet = ogm_packet,
189  .granule_is_start = 1,
190  .nb_header = 2,
191 };
192 
194  .magic = "\001audio",
195  .magicsize = 6,
196  .header = ogm_header,
197  .packet = ogm_packet,
198  .granule_is_start = 1,
199  .nb_header = 2,
200 };
201 
202 const struct ogg_codec ff_ogm_text_codec = {
203  .magic = "\001text",
204  .magicsize = 5,
205  .header = ogm_header,
206  .packet = ogm_packet,
207  .granule_is_start = 1,
208  .nb_header = 2,
209 };
210 
211 const struct ogg_codec ff_ogm_old_codec = {
212  .magic = "\001Direct Show Samples embedded in Ogg",
213  .magicsize = 35,
214  .header = ogm_dshow_header,
215  .packet = ogm_packet,
216  .granule_is_start = 1,
217  .nb_header = 1,
218 };
#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:211
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:2944
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:4404
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3915
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:123
Format I/O context.
Definition: avformat.h:1319
unsigned int psize
Definition: oggdec.h:66
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
int width
Video only.
Definition: avcodec.h:3981
const struct ogg_codec ff_ogm_text_codec
Definition: oggparseogm.c:202
enum AVStreamParseType need_parsing
Definition: avformat.h:1074
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
const uint8_t * buffer
Definition: bytestream.h:34
uint32_t tag
Definition: movenc.c:1353
bitstream reader API header.
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3944
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
#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
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3911
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:428
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3933
Only parse headers, do not repack.
Definition: avformat.h:807
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3105
#define FFMIN(a, b)
Definition: common.h:96
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
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:184
Stream structure.
Definition: avformat.h:876
unsigned int pduration
Definition: oggdec.h:68
static int ogm_packet(AVFormatContext *s, int idx)
Definition: oggparseogm.c:164
const int8_t * magic
Definition: oggdec.h:32
int sample_rate
Audio only.
Definition: avcodec.h:4025
uint8_t * buf
Definition: oggdec.h:62
full parsing and repack
Definition: avformat.h:806
Main libavformat public API header.
raw UTF-8 text
Definition: avcodec.h:601
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:728
Definition: oggdec.h:101
void * priv_data
Format private data.
Definition: avformat.h:1347
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3929
int channels
Audio only.
Definition: avcodec.h:4021
AVCodecParameters * codecpar
Definition: avformat.h:1006
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3919
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:193