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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 
27 #include "libavutil/avassert.h"
28 #include "libavutil/intreadwrite.h"
29 
30 #include "libavcodec/bytestream.h"
31 
32 #include "avformat.h"
33 #include "internal.h"
34 #include "oggdec.h"
35 #include "riff.h"
36 
37 static int
39 {
40  struct ogg *ogg = s->priv_data;
41  struct ogg_stream *os = ogg->streams + idx;
42  AVStream *st = s->streams[idx];
44  uint64_t time_unit;
45  uint64_t spu;
46  uint32_t size;
47 
48  bytestream2_init(&p, os->buf + os->pstart, os->psize);
49  if (!(bytestream2_peek_byte(&p) & 1))
50  return 0;
51 
52  if (bytestream2_peek_byte(&p) == 1) {
53  bytestream2_skip(&p, 1);
54 
55  if (bytestream2_peek_byte(&p) == 'v'){
56  int tag;
58  bytestream2_skip(&p, 8);
59  tag = bytestream2_get_le32(&p);
61  st->codecpar->codec_tag = tag;
64  } else if (bytestream2_peek_byte(&p) == 't') {
67  bytestream2_skip(&p, 12);
68  } else {
69  uint8_t acid[5] = { 0 };
70  int cid;
72  bytestream2_skip(&p, 8);
73  bytestream2_get_buffer(&p, acid, 4);
74  acid[4] = 0;
75  cid = strtol(acid, NULL, 16);
77  // our parser completely breaks AAC in Ogg
78  if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
80  }
81 
82  size = bytestream2_get_le32(&p);
83  size = FFMIN(size, os->psize);
84  time_unit = bytestream2_get_le64(&p);
85  spu = bytestream2_get_le64(&p);
86  if (!time_unit || !spu) {
87  av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
88  return AVERROR_INVALIDDATA;
89  }
90 
91  bytestream2_skip(&p, 4); /* default_len */
92  bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
93 
95  st->codecpar->width = bytestream2_get_le32(&p);
96  st->codecpar->height = bytestream2_get_le32(&p);
97  avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
98  } else {
99  st->codecpar->channels = bytestream2_get_le16(&p);
100  bytestream2_skip(&p, 2); /* block_align */
101  st->codecpar->bit_rate = bytestream2_get_le32(&p) * 8;
102  st->codecpar->sample_rate = spu * 10000000 / time_unit;
103  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
104  if (size >= 56 && st->codecpar->codec_id == AV_CODEC_ID_AAC) {
105  bytestream2_skip(&p, 4);
106  size -= 4;
107  }
108  if (size > 52) {
110  size -= 52;
111  ff_alloc_extradata(st->codecpar, size);
113  }
114  }
115  } else if (bytestream2_peek_byte(&p) == 3) {
116  bytestream2_skip(&p, 7);
117  if (bytestream2_get_bytes_left(&p) > 1)
119  }
120 
121  return 1;
122 }
123 
124 static int
126 {
127  struct ogg *ogg = s->priv_data;
128  struct ogg_stream *os = ogg->streams + idx;
129  AVStream *st = s->streams[idx];
130  uint8_t *p = os->buf + os->pstart;
131  uint32_t t;
132 
133  if(!(*p & 1))
134  return 0;
135  if(*p != 1)
136  return 1;
137 
138  if (os->psize < 100)
139  return AVERROR_INVALIDDATA;
140  t = AV_RL32(p + 96);
141 
142  if(t == 0x05589f80){
143  if (os->psize < 184)
144  return AVERROR_INVALIDDATA;
145 
148  avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
149  st->codecpar->width = AV_RL32(p + 176);
150  st->codecpar->height = AV_RL32(p + 180);
151  } else if(t == 0x05589f81){
152  if (os->psize < 136)
153  return AVERROR_INVALIDDATA;
154 
157  st->codecpar->channels = AV_RL16(p + 126);
158  st->codecpar->sample_rate = AV_RL32(p + 128);
159  st->codecpar->bit_rate = AV_RL32(p + 132) * 8;
160  }
161 
162  return 1;
163 }
164 
165 static int
167 {
168  struct ogg *ogg = s->priv_data;
169  struct ogg_stream *os = ogg->streams + idx;
170  uint8_t *p = os->buf + os->pstart;
171  int lb;
172 
173  if(*p & 8)
174  os->pflags |= AV_PKT_FLAG_KEY;
175 
176  lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
177  os->pstart += lb + 1;
178  os->psize -= lb + 1;
179 
180  while (lb--)
181  os->pduration += p[lb+1] << (lb*8);
182 
183  return 0;
184 }
185 
187  .magic = "\001video",
188  .magicsize = 6,
189  .header = ogm_header,
190  .packet = ogm_packet,
191  .granule_is_start = 1,
192  .nb_header = 2,
193 };
194 
196  .magic = "\001audio",
197  .magicsize = 6,
198  .header = ogm_header,
199  .packet = ogm_packet,
200  .granule_is_start = 1,
201  .nb_header = 2,
202 };
203 
204 const struct ogg_codec ff_ogm_text_codec = {
205  .magic = "\001text",
206  .magicsize = 5,
207  .header = ogm_header,
208  .packet = ogm_packet,
209  .granule_is_start = 1,
210  .nb_header = 2,
211 };
212 
213 const struct ogg_codec ff_ogm_old_codec = {
214  .magic = "\001Direct Show Samples embedded in Ogg",
215  .magicsize = 35,
216  .header = ogm_dshow_header,
217  .packet = ogm_packet,
218  .granule_is_start = 1,
219  .nb_header = 1,
220 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
const struct ogg_codec ff_ogm_old_codec
Definition: oggparseogm.c:213
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:3002
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:4549
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3979
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:38
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:125
Format I/O context.
Definition: avformat.h:1330
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:4045
const struct ogg_codec ff_ogm_text_codec
Definition: oggparseogm.c:204
enum AVStreamParseType need_parsing
Definition: avformat.h:1068
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1398
const uint8_t * buffer
Definition: bytestream.h:34
uint32_t tag
Definition: movenc.c:1382
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:4008
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1632
#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:3975
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:435
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3997
Only parse headers, do not repack.
Definition: avformat.h:809
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:3165
#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:186
Stream structure.
Definition: avformat.h:881
unsigned int pduration
Definition: oggdec.h:68
static int ogm_packet(AVFormatContext *s, int idx)
Definition: oggparseogm.c:166
const int8_t * magic
Definition: oggdec.h:32
int sample_rate
Audio only.
Definition: avcodec.h:4089
uint8_t * buf
Definition: oggdec.h:62
full parsing and repack
Definition: avformat.h:808
Main libavformat public API header.
raw UTF-8 text
Definition: avcodec.h:606
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:733
Definition: oggdec.h:101
void * priv_data
Format private data.
Definition: avformat.h:1358
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3993
int channels
Audio only.
Definition: avcodec.h:4085
AVCodecParameters * codecpar
Definition: avformat.h:1233
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3983
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:195