FFmpeg
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/intreadwrite.h"
28 
29 #include "libavcodec/bytestream.h"
30 
31 #include "avformat.h"
32 #include "internal.h"
33 #include "oggdec.h"
34 #include "riff.h"
35 
36 static int
38 {
39  struct ogg *ogg = s->priv_data;
40  struct ogg_stream *os = ogg->streams + idx;
41  AVStream *st = s->streams[idx];
43  uint64_t time_unit;
44  uint64_t spu;
45  uint32_t size;
46 
47  bytestream2_init(&p, os->buf + os->pstart, os->psize);
48  if (!(bytestream2_peek_byte(&p) & 1))
49  return 0;
50 
51  if (bytestream2_peek_byte(&p) == 1) {
52  bytestream2_skip(&p, 1);
53 
54  if (bytestream2_peek_byte(&p) == 'v'){
55  int tag;
57  bytestream2_skip(&p, 8);
58  tag = bytestream2_get_le32(&p);
60  st->codecpar->codec_tag = tag;
63  } else if (bytestream2_peek_byte(&p) == 't') {
66  bytestream2_skip(&p, 12);
67  } else {
68  uint8_t acid[5] = { 0 };
69  int cid;
71  bytestream2_skip(&p, 8);
72  bytestream2_get_buffer(&p, acid, 4);
73  acid[4] = 0;
74  cid = strtol(acid, NULL, 16);
76  // our parser completely breaks AAC in Ogg
77  if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
79  }
80 
81  size = bytestream2_get_le32(&p);
82  size = FFMIN(size, os->psize);
83  time_unit = bytestream2_get_le64(&p);
84  spu = bytestream2_get_le64(&p);
85  if (!time_unit || !spu) {
86  av_log(s, AV_LOG_ERROR, "Invalid timing values.\n");
87  return AVERROR_INVALIDDATA;
88  }
89 
90  bytestream2_skip(&p, 4); /* default_len */
91  bytestream2_skip(&p, 8); /* buffersize + bits_per_sample */
92 
94  st->codecpar->width = bytestream2_get_le32(&p);
95  st->codecpar->height = bytestream2_get_le32(&p);
96  avpriv_set_pts_info(st, 64, time_unit, spu * 10000000);
97  } else {
98  st->codecpar->channels = bytestream2_get_le16(&p);
99  bytestream2_skip(&p, 2); /* block_align */
100  st->codecpar->bit_rate = bytestream2_get_le32(&p) * 8;
101  st->codecpar->sample_rate = spu * 10000000 / time_unit;
102  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
103  if (size >= 56 && st->codecpar->codec_id == AV_CODEC_ID_AAC) {
104  bytestream2_skip(&p, 4);
105  size -= 4;
106  }
107  if (size > 52) {
108  size -= 52;
110  return AVERROR_INVALIDDATA;
111  av_freep(&st->codecpar->extradata);
112  if (ff_alloc_extradata(st->codecpar, size) < 0)
113  return AVERROR(ENOMEM);
115  }
116  }
117 
118  // Update internal avctx with changes to codecpar above.
119  st->internal->need_context_update = 1;
120  } else if (bytestream2_peek_byte(&p) == 3) {
121  bytestream2_skip(&p, 7);
122  if (bytestream2_get_bytes_left(&p) > 1)
124  }
125 
126  return 1;
127 }
128 
129 static int
131 {
132  struct ogg *ogg = s->priv_data;
133  struct ogg_stream *os = ogg->streams + idx;
134  AVStream *st = s->streams[idx];
135  uint8_t *p = os->buf + os->pstart;
136  uint32_t t;
137 
138  if(!(*p & 1))
139  return 0;
140  if(*p != 1)
141  return 1;
142 
143  if (os->psize < 100)
144  return AVERROR_INVALIDDATA;
145  t = AV_RL32(p + 96);
146 
147  if(t == 0x05589f80){
148  if (os->psize < 184)
149  return AVERROR_INVALIDDATA;
150 
153  avpriv_set_pts_info(st, 64, AV_RL64(p + 164), 10000000);
154  st->codecpar->width = AV_RL32(p + 176);
155  st->codecpar->height = AV_RL32(p + 180);
156  } else if(t == 0x05589f81){
157  if (os->psize < 136)
158  return AVERROR_INVALIDDATA;
159 
162  st->codecpar->channels = AV_RL16(p + 126);
163  st->codecpar->sample_rate = AV_RL32(p + 128);
164  st->codecpar->bit_rate = AV_RL32(p + 132) * 8;
165  }
166 
167  return 1;
168 }
169 
170 static int
172 {
173  struct ogg *ogg = s->priv_data;
174  struct ogg_stream *os = ogg->streams + idx;
175  uint8_t *p = os->buf + os->pstart;
176  int lb;
177 
178  if(*p & 8)
179  os->pflags |= AV_PKT_FLAG_KEY;
180 
181  lb = ((*p & 2) << 1) | ((*p >> 6) & 3);
182  if (os->psize < lb + 1)
183  return AVERROR_INVALIDDATA;
184 
185  os->pstart += lb + 1;
186  os->psize -= lb + 1;
187 
188  while (lb--)
189  os->pduration += (uint64_t)p[lb+1] << (lb*8);
190 
191  return 0;
192 }
193 
195  .magic = "\001video",
196  .magicsize = 6,
197  .header = ogm_header,
198  .packet = ogm_packet,
199  .granule_is_start = 1,
200  .nb_header = 2,
201 };
202 
204  .magic = "\001audio",
205  .magicsize = 6,
206  .header = ogm_header,
207  .packet = ogm_packet,
208  .granule_is_start = 1,
209  .nb_header = 2,
210 };
211 
212 const struct ogg_codec ff_ogm_text_codec = {
213  .magic = "\001text",
214  .magicsize = 5,
215  .header = ogm_header,
216  .packet = ogm_packet,
217  .granule_is_start = 1,
218  .nb_header = 2,
219 };
220 
221 const struct ogg_codec ff_ogm_old_codec = {
222  .magic = "\001Direct Show Samples embedded in Ogg",
223  .magicsize = 35,
224  .header = ogm_dshow_header,
225  .packet = ogm_packet,
226  .granule_is_start = 1,
227  .nb_header = 1,
228 };
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
GetByteContext
Definition: bytestream.h:33
AV_RL64
uint64_t_TMPL AV_RL64
Definition: bytestream.h:87
ff_ogm_old_codec
const struct ogg_codec ff_ogm_old_codec
Definition: oggparseogm.c:221
AV_CODEC_ID_MPEG4
@ AV_CODEC_ID_MPEG4
Definition: avcodec.h:230
AVStream::internal
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1227
ff_codec_wav_tags
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:499
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
ogg_stream::buf
uint8_t * buf
Definition: oggdec.h:62
ogg
Definition: oggdec.h:101
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
bytestream2_get_bytes_left
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4063
ogg_stream::pstart
unsigned int pstart
Definition: oggdec.h:65
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:4023
GetByteContext::buffer
const uint8_t * buffer
Definition: bytestream.h:34
AVStream::need_parsing
enum AVStreamParseType need_parsing
Definition: avformat.h:1088
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:90
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1017
ff_ogm_text_codec
const struct ogg_codec ff_ogm_text_codec
Definition: oggparseogm.c:212
NULL
#define NULL
Definition: coverity.c:32
bytestream2_get_buffer
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
ogg::streams
struct ogg_stream * streams
Definition: oggdec.h:102
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:4067
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3975
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: avcodec.h:566
ogm_header
static int ogm_header(AVFormatContext *s, int idx)
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggparseogm.c:37
cid
int cid
Definition: mxfenc.c:2072
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3146
avpriv_set_pts_info
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:4910
size
int size
Definition: twinvq_data.h:11134
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
ff_ogm_video_codec
const struct ogg_codec ff_ogm_video_codec
Definition: oggparseogm.c:194
ogg_stream::pflags
unsigned int pflags
Definition: oggdec.h:67
ogg_stream
Definition: oggdec.h:61
AVCodecParameters::height
int height
Definition: avcodec.h:4024
ogm_dshow_header
static int ogm_dshow_header(AVFormatContext *s, int idx)
Definition: oggparseogm.c:130
uint8_t
uint8_t
Definition: audio_convert.c:194
tag
uint32_t tag
Definition: movenc.c:1496
AVStream
Stream structure.
Definition: avformat.h:870
AVSTREAM_PARSE_HEADERS
@ AVSTREAM_PARSE_HEADERS
Only parse headers, do not repack.
Definition: avformat.h:792
avformat.h
AV_CODEC_ID_TEXT
@ AV_CODEC_ID_TEXT
raw UTF-8 text
Definition: avcodec.h:660
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:88
oggdec.h
ff_codec_bmp_tags
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
ff_ogm_audio_codec
const struct ogg_codec ff_ogm_audio_codec
Definition: oggparseogm.c:203
ogm_packet
static int ogm_packet(AVFormatContext *s, int idx)
Definition: oggparseogm.c:171
ff_vorbis_stream_comment
int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, const uint8_t *buf, int size)
Definition: oggparsevorbis.c:75
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVStreamInternal::need_context_update
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:192
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
riff.h
ogg_stream::psize
unsigned int psize
Definition: oggdec.h:66
ogg_codec
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggdec.h:31
bytestream.h
AVSTREAM_PARSE_FULL
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:791
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
ogg_codec::magic
const int8_t * magic
Definition: oggdec.h:32
ogg_stream::pduration
unsigned int pduration
Definition: oggdec.h:68
ff_alloc_extradata
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:3309