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takdec.c
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1 /*
2  * Raw TAK demuxer
3  * Copyright (c) 2012 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/crc.h"
23 
24 #define BITSTREAM_READER_LE
25 #include "libavcodec/tak.h"
26 
27 #include "apetag.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "internal.h"
31 #include "rawdec.h"
32 
33 typedef struct TAKDemuxContext {
35  int64_t data_end;
37 
38 static int tak_probe(AVProbeData *p)
39 {
40  if (!memcmp(p->buf, "tBaK", 4))
42  return 0;
43 }
44 
45 static unsigned long tak_check_crc(unsigned long checksum, const uint8_t *buf,
46  unsigned int len)
47 {
48  return av_crc(av_crc_get_table(AV_CRC_24_IEEE), checksum, buf, len);
49 }
50 
52 {
54  AVIOContext *pb = s->pb;
55  GetBitContext gb;
56  AVStream *st;
57  uint8_t *buffer = NULL;
58  int ret;
59 
60  st = avformat_new_stream(s, 0);
61  if (!st)
62  return AVERROR(ENOMEM);
63 
67 
68  tc->mlast_frame = 0;
69  if (avio_rl32(pb) != MKTAG('t', 'B', 'a', 'K')) {
70  avio_seek(pb, -4, SEEK_CUR);
71  return 0;
72  }
73 
74  while (!avio_feof(pb)) {
75  enum TAKMetaDataType type;
76  int size;
77 
78  type = avio_r8(pb) & 0x7f;
79  size = avio_rl24(pb);
80 
81  switch (type) {
85  if (size <= 3)
86  return AVERROR_INVALIDDATA;
87 
88  buffer = av_malloc(size - 3 + AV_INPUT_BUFFER_PADDING_SIZE);
89  if (!buffer)
90  return AVERROR(ENOMEM);
91  memset(buffer + size - 3, 0, AV_INPUT_BUFFER_PADDING_SIZE);
92 
93  ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
94  if (avio_read(pb, buffer, size - 3) != size - 3) {
95  av_freep(&buffer);
96  return AVERROR(EIO);
97  }
98  if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
99  av_log(s, AV_LOG_ERROR, "%d metadata block CRC error.\n", type);
100  if (s->error_recognition & AV_EF_EXPLODE) {
101  av_freep(&buffer);
102  return AVERROR_INVALIDDATA;
103  }
104  }
105 
106  break;
107  case TAK_METADATA_MD5: {
108  uint8_t md5[16];
109  int i;
110 
111  if (size != 19)
112  return AVERROR_INVALIDDATA;
113  ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
114  avio_read(pb, md5, 16);
115  if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
116  av_log(s, AV_LOG_ERROR, "MD5 metadata block CRC error.\n");
118  return AVERROR_INVALIDDATA;
119  }
120 
121  av_log(s, AV_LOG_VERBOSE, "MD5=");
122  for (i = 0; i < 16; i++)
123  av_log(s, AV_LOG_VERBOSE, "%02x", md5[i]);
124  av_log(s, AV_LOG_VERBOSE, "\n");
125  break;
126  }
127  case TAK_METADATA_END: {
128  int64_t curpos = avio_tell(pb);
129 
130  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
131  ff_ape_parse_tag(s);
132  avio_seek(pb, curpos, SEEK_SET);
133  }
134 
135  tc->data_end += curpos;
136  return 0;
137  }
138  default:
139  ret = avio_skip(pb, size);
140  if (ret < 0)
141  return ret;
142  }
143 
144  if (type == TAK_METADATA_STREAMINFO) {
145  TAKStreamInfo ti;
146 
147  ret = avpriv_tak_parse_streaminfo(&ti, buffer, size -3);
148  if (ret < 0)
149  return AVERROR_INVALIDDATA;
150  if (ti.samples > 0)
151  st->duration = ti.samples;
153  if (ti.ch_layout)
155  st->codecpar->sample_rate = ti.sample_rate;
156  st->codecpar->channels = ti.channels;
157  st->start_time = 0;
158  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
159  st->codecpar->extradata = buffer;
160  st->codecpar->extradata_size = size - 3;
161  buffer = NULL;
162  } else if (type == TAK_METADATA_LAST_FRAME) {
163  if (size != 11)
164  return AVERROR_INVALIDDATA;
165  init_get_bits8(&gb, buffer, size - 3);
166  tc->mlast_frame = 1;
169  av_freep(&buffer);
170  } else if (type == TAK_METADATA_ENCODER) {
171  init_get_bits8(&gb, buffer, size - 3);
172  av_log(s, AV_LOG_VERBOSE, "encoder version: %0X\n",
174  av_freep(&buffer);
175  }
176  }
177 
178  return AVERROR_EOF;
179 }
180 
182 {
184  int ret;
185 
186  if (tc->mlast_frame) {
187  AVIOContext *pb = s->pb;
188  int64_t size, left;
189 
190  left = tc->data_end - avio_tell(pb);
191  size = FFMIN(left, 1024);
192  if (size <= 0)
193  return AVERROR_EOF;
194 
195  ret = av_get_packet(pb, pkt, size);
196  if (ret < 0)
197  return ret;
198 
199  pkt->stream_index = 0;
200  } else {
201  ret = ff_raw_read_partial_packet(s, pkt);
202  }
203 
204  return ret;
205 }
206 
208  .name = "tak",
209  .long_name = NULL_IF_CONFIG_SMALL("raw TAK"),
210  .priv_data_size = sizeof(TAKDemuxContext),
215  .extensions = "tak",
216  .raw_codec_id = AV_CODEC_ID_TAK,
217 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int channels
Definition: tak.h:133
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
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:4748
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3838
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:244
#define tc
Definition: regdef.h:69
uint64_t ch_layout
Definition: tak.h:138
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
static AVPacket pkt
TAKMetaDataType
Definition: tak.h:104
Format I/O context.
Definition: avformat.h:1325
uint8_t
#define av_malloc(s)
enum AVStreamParseType need_parsing
Definition: avformat.h:1085
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4378
int64_t data_end
Definition: takdec.c:35
Public header for CRC hash function implementation.
struct AVMD5 * md5
Definition: movenc.c:56
static int flags
Definition: log.c:57
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:293
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:797
uint64_t channel_layout
Audio only.
Definition: avcodec.h:3940
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:646
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:367
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:768
#define AVERROR(e)
Definition: error.h:43
int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawdec.c:35
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3834
static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: takdec.c:181
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3856
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:637
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int bps
Definition: tak.h:134
int64_t samples
Definition: tak.h:139
void ffio_init_checksum(AVIOContext *s, unsigned long(*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum)
Definition: aviobuf.c:625
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:792
#define FFMIN(a, b)
Definition: common.h:96
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
Definition: crc.c:366
AVInputFormat ff_tak_demuxer
Definition: takdec.c:207
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2637
static volatile int checksum
Definition: adler32.c:30
#define TAK_LAST_FRAME_SIZE_BITS
Definition: tak.h:44
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:528
Stream structure.
Definition: avformat.h:872
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:456
static int tak_probe(AVProbeData *p)
Definition: takdec.c:38
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:470
TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions.
unsigned long ffio_get_checksum(AVIOContext *s)
Definition: aviobuf.c:617
int mlast_frame
Definition: takdec.c:34
static unsigned long tak_check_crc(unsigned long checksum, const uint8_t *buf, unsigned int len)
Definition: takdec.c:45
static int tak_read_header(AVFormatContext *s)
Definition: takdec.c:51
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:458
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:346
int sample_rate
Definition: tak.h:132
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:921
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:349
int sample_rate
Audio only.
Definition: avcodec.h:3948
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:911
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1570
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:770
int len
void * priv_data
Format private data.
Definition: avformat.h:1353
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3880
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3852
int channels
Audio only.
Definition: avcodec.h:3944
int avpriv_tak_parse_streaminfo(TAKStreamInfo *s, const uint8_t *buf, int size)
Parse the Streaminfo metadata block.
Definition: tak.c:128
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1014
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:356
#define TAK_ENCODER_VERSION_BITS
Definition: tak.h:47
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:760
int stream_index
Definition: avcodec.h:1416
#define TAK_LAST_FRAME_POS_BITS
Definition: tak.h:43
#define MKTAG(a, b, c, d)
Definition: common.h:366
This structure stores compressed data.
Definition: avcodec.h:1391
GLuint buffer
Definition: opengl_enc.c:102