FFmpeg: libavcodec/tta.c Source File

FFmpeg
tta.c
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1 /*
2  * TTA (The Lossless True Audio) decoder
3  * Copyright (c) 2006 Alex Beregszaszi
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 /**
23  * @file
24  * TTA (The Lossless True Audio) decoder
25  * @see http://www.true-audio.com/
26  * @see http://tta.corecodec.org/
27  * @author Alex Beregszaszi
28  */
29 
30 #include <limits.h>
31 
32 #include "libavutil/crc.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/opt.h"
35 
36  #define BITSTREAM_READER_LE
37 #include "ttadata.h"
38 #include "ttadsp.h"
39 #include "avcodec.h"
40 #include "get_bits.h"
41 #include "thread.h"
42 #include "unary.h"
43 #include "internal.h"
44 
45  #define FORMAT_SIMPLE 1
46  #define FORMAT_ENCRYPTED 2
47 
48  typedef struct TTAContext {
49   AVClass *class;
50   AVCodecContext *avctx;
51   const AVCRC *crc_table;
52 
53   int format, channels, bps;
54   unsigned data_length;
55   int frame_length, last_frame_length;
56 
57   int32_t *decode_buffer;
58 
59   uint8_t crc_pass[8];
60   uint8_t *pass;
61   TTAChannel *ch_ctx;
62   TTADSPContext dsp;
63 } TTAContext;
64 
65  static const int64_t tta_channel_layouts[7] = {
66  AV_CH_LAYOUT_STEREO,
67  AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
68  AV_CH_LAYOUT_QUAD,
69  0,
70  AV_CH_LAYOUT_5POINT1_BACK,
71  AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
72  AV_CH_LAYOUT_7POINT1_WIDE
73 };
74 
75  static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
76 {
77  uint32_t crc, CRC;
78 
79  CRC = AV_RL32(buf + buf_size);
80  crc = av_crc(s->crc_table, 0xFFFFFFFFU, buf, buf_size);
81  if (CRC != (crc ^ 0xFFFFFFFFU)) {
82  av_log(s->avctx, AV_LOG_ERROR, "CRC error\n");
83  return AVERROR_INVALIDDATA;
84  }
85 
86  return 0;
87 }
88 
89  static uint64_t tta_check_crc64(uint8_t *pass)
90 {
91  uint64_t crc = UINT64_MAX, poly = 0x42F0E1EBA9EA3693U;
92  uint8_t *end = pass + strlen(pass);
93  int i;
94 
95  while (pass < end) {
96  crc ^= (uint64_t)*pass++ << 56;
97  for (i = 0; i < 8; i++)
98  crc = (crc << 1) ^ (poly & (((int64_t) crc) >> 63));
99  }
100 
101  return crc ^ UINT64_MAX;
102 }
103 
104  static int allocate_buffers(AVCodecContext *avctx)
105 {
106  TTAContext *s = avctx->priv_data;
107 
108  if (s->bps < 3) {
109  s->decode_buffer = av_mallocz_array(sizeof(int32_t)*s->frame_length, s->channels);
110  if (!s->decode_buffer)
111  return AVERROR(ENOMEM);
112  } else
113  s->decode_buffer = NULL;
114  s->ch_ctx = av_malloc_array(avctx->channels, sizeof(*s->ch_ctx));
115  if (!s->ch_ctx) {
116  av_freep(&s->decode_buffer);
117  return AVERROR(ENOMEM);
118  }
119 
120  return 0;
121 }
122 
123  static av_cold int tta_decode_init(AVCodecContext * avctx)
124 {
125  TTAContext *s = avctx->priv_data;
126  GetBitContext gb;
127  int total_frames;
128  int ret;
129 
130  s->avctx = avctx;
131 
132  // 30bytes includes TTA1 header
133  if (avctx->extradata_size < 22)
134  return AVERROR_INVALIDDATA;
135 
136  s->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
137  ret = init_get_bits8(&gb, avctx->extradata, avctx->extradata_size);
138  if (ret < 0)
139  return ret;
140 
141  if (show_bits_long(&gb, 32) == AV_RL32("TTA1")) {
142  /* signature */
143  skip_bits_long(&gb, 32);
144 
145  s->format = get_bits(&gb, 16);
146  if (s->format > 2) {
147  av_log(avctx, AV_LOG_ERROR, "Invalid format\n");
148  return AVERROR_INVALIDDATA;
149  }
150  if (s->format == FORMAT_ENCRYPTED) {
151  if (!s->pass) {
152  av_log(avctx, AV_LOG_ERROR, "Missing password for encrypted stream. Please use the -password option\n");
153  return AVERROR(EINVAL);
154  }
155  AV_WL64(s->crc_pass, tta_check_crc64(s->pass));
156  }
157  avctx->channels = s->channels = get_bits(&gb, 16);
158  if (s->channels > 1 && s->channels < 9)
159  avctx->channel_layout = tta_channel_layouts[s->channels-2];
160  avctx->bits_per_raw_sample = get_bits(&gb, 16);
161  s->bps = (avctx->bits_per_raw_sample + 7) / 8;
162  avctx->sample_rate = get_bits_long(&gb, 32);
163  s->data_length = get_bits_long(&gb, 32);
164  skip_bits_long(&gb, 32); // CRC32 of header
165 
166  if (s->channels == 0) {
167  av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
168  return AVERROR_INVALIDDATA;
169  } else if (avctx->sample_rate == 0) {
170  av_log(avctx, AV_LOG_ERROR, "Invalid samplerate\n");
171  return AVERROR_INVALIDDATA;
172  }
173 
174  switch(s->bps) {
175  case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
176  case 2:
177  avctx->sample_fmt = AV_SAMPLE_FMT_S16;
178  break;
179  case 3:
180  avctx->sample_fmt = AV_SAMPLE_FMT_S32;
181  break;
182  //case 4: avctx->sample_fmt = AV_SAMPLE_FMT_S32; break;
183  default:
184  av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported sample format.\n");
185  return AVERROR_INVALIDDATA;
186  }
187 
188  // prevent overflow
189  if (avctx->sample_rate > 0x7FFFFFu) {
190  av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
191  return AVERROR(EINVAL);
192  }
193  s->frame_length = 256 * avctx->sample_rate / 245;
194 
195  s->last_frame_length = s->data_length % s->frame_length;
196  total_frames = s->data_length / s->frame_length +
197  (s->last_frame_length ? 1 : 0);
198 
199  av_log(avctx, AV_LOG_DEBUG, "format: %d chans: %d bps: %d rate: %d block: %d\n",
200  s->format, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
201  avctx->block_align);
202  av_log(avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
203  s->data_length, s->frame_length, s->last_frame_length, total_frames);
204 
205  if(s->frame_length >= UINT_MAX / (s->channels * sizeof(int32_t))){
206  av_log(avctx, AV_LOG_ERROR, "frame_length too large\n");
207  return AVERROR_INVALIDDATA;
208  }
209  } else {
210  av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\n");
211  return AVERROR_INVALIDDATA;
212  }
213 
214  ff_ttadsp_init(&s->dsp);
215 
216  return allocate_buffers(avctx);
217 }
218 
219  static int tta_decode_frame(AVCodecContext *avctx, void *data,
220  int *got_frame_ptr, AVPacket *avpkt)
221 {
222  AVFrame *frame = data;
223  ThreadFrame tframe = { .f = data };
224  const uint8_t *buf = avpkt->data;
225  int buf_size = avpkt->size;
226  TTAContext *s = avctx->priv_data;
227  GetBitContext gb;
228  int i, ret;
229  int cur_chan = 0, framelen = s->frame_length;
230  int32_t *p;
231 
232  if (avctx->err_recognition & AV_EF_CRCCHECK) {
233  if (buf_size < 4 ||
234  (tta_check_crc(s, buf, buf_size - 4) && avctx->err_recognition & AV_EF_EXPLODE))
235  return AVERROR_INVALIDDATA;
236  }
237 
238  if ((ret = init_get_bits8(&gb, avpkt->data, avpkt->size)) < 0)
239  return ret;
240 
241  /* get output buffer */
242  frame->nb_samples = framelen;
243  if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
244  return ret;
245 
246  // decode directly to output buffer for 24-bit sample format
247  if (s->bps == 3)
248  s->decode_buffer = (int32_t *)frame->data[0];
249 
250  // init per channel states
251  for (i = 0; i < s->channels; i++) {
252  TTAFilter *filter = &s->ch_ctx[i].filter;
253  s->ch_ctx[i].predictor = 0;
254  ff_tta_filter_init(filter, ff_tta_filter_configs[s->bps-1]);
255  if (s->format == FORMAT_ENCRYPTED) {
256  int i;
257  for (i = 0; i < 8; i++)
258  filter->qm[i] = sign_extend(s->crc_pass[i], 8);
259  }
260  ff_tta_rice_init(&s->ch_ctx[i].rice, 10, 10);
261  }
262 
263  i = 0;
264  for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
265  int32_t *predictor = &s->ch_ctx[cur_chan].predictor;
266  TTAFilter *filter = &s->ch_ctx[cur_chan].filter;
267  TTARice *rice = &s->ch_ctx[cur_chan].rice;
268  uint32_t unary, depth, k;
269  int32_t value;
270 
271  unary = get_unary(&gb, 0, get_bits_left(&gb));
272 
273  if (unary == 0) {
274  depth = 0;
275  k = rice->k0;
276  } else {
277  depth = 1;
278  k = rice->k1;
279  unary--;
280  }
281 
282  if (get_bits_left(&gb) < k) {
283  ret = AVERROR_INVALIDDATA;
284  goto error;
285  }
286 
287  if (k) {
288  if (k > MIN_CACHE_BITS || unary > INT32_MAX >> k) {
289  ret = AVERROR_INVALIDDATA;
290  goto error;
291  }
292  value = (unary << k) + get_bits(&gb, k);
293  } else
294  value = unary;
295 
296  // FIXME: copy paste from original
297  switch (depth) {
298  case 1:
299  rice->sum1 += value - (rice->sum1 >> 4);
300  if (rice->k1 > 0 && rice->sum1 < ff_tta_shift_16[rice->k1])
301  rice->k1--;
302  else if(rice->sum1 > ff_tta_shift_16[rice->k1 + 1])
303  rice->k1++;
304  value += ff_tta_shift_1[rice->k0];
305  default:
306  rice->sum0 += value - (rice->sum0 >> 4);
307  if (rice->k0 > 0 && rice->sum0 < ff_tta_shift_16[rice->k0])
308  rice->k0--;
309  else if(rice->sum0 > ff_tta_shift_16[rice->k0 + 1])
310  rice->k0++;
311  }
312 
313  // extract coded value
314  *p = 1 + ((value >> 1) ^ ((value & 1) - 1));
315 
316  // run hybrid filter
317  s->dsp.filter_process(filter->qm, filter->dx, filter->dl, &filter->error, p,
318  filter->shift, filter->round);
319 
320  // fixed order prediction
321 #define PRED(x, k) (int32_t)((((uint64_t)(x) << (k)) - (x)) >> (k))
322  switch (s->bps) {
323  case 1: *p += PRED(*predictor, 4); break;
324  case 2:
325  case 3: *p += PRED(*predictor, 5); break;
326  case 4: *p += *predictor; break;
327  }
328  *predictor = *p;
329 
330  // flip channels
331  if (cur_chan < (s->channels-1))
332  cur_chan++;
333  else {
334  // decorrelate in case of multiple channels
335  if (s->channels > 1) {
336  int32_t *r = p - 1;
337  for (*p += *r / 2; r > p - s->channels; r--)
338  *r = *(r + 1) - *r;
339  }
340  cur_chan = 0;
341  i++;
342  // check for last frame
343  if (i == s->last_frame_length && get_bits_left(&gb) / 8 == 4) {
344  frame->nb_samples = framelen = s->last_frame_length;
345  break;
346  }
347  }
348  }
349 
350  align_get_bits(&gb);
351  if (get_bits_left(&gb) < 32) {
352  ret = AVERROR_INVALIDDATA;
353  goto error;
354  }
355  skip_bits_long(&gb, 32); // frame crc
356 
357  // convert to output buffer
358  switch (s->bps) {
359  case 1: {
360  uint8_t *samples = (uint8_t *)frame->data[0];
361  for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
362  *samples++ = *p + 0x80;
363  break;
364  }
365  case 2: {
366  int16_t *samples = (int16_t *)frame->data[0];
367  for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
368  *samples++ = *p;
369  break;
370  }
371  case 3: {
372  // shift samples for 24-bit sample format
373  int32_t *samples = (int32_t *)frame->data[0];
374  for (i = 0; i < framelen * s->channels; i++)
375  *samples++ <<= 8;
376  // reset decode buffer
377  s->decode_buffer = NULL;
378  break;
379  }
380  }
381 
382  *got_frame_ptr = 1;
383 
384  return buf_size;
385 error:
386  // reset decode buffer
387  if (s->bps == 3)
388  s->decode_buffer = NULL;
389  return ret;
390 }
391 
392  static int init_thread_copy(AVCodecContext *avctx)
393 {
394  TTAContext *s = avctx->priv_data;
395  s->avctx = avctx;
396  return allocate_buffers(avctx);
397 }
398 
399  static av_cold int tta_decode_close(AVCodecContext *avctx) {
400  TTAContext *s = avctx->priv_data;
401 
402  if (s->bps < 3)
403  av_freep(&s->decode_buffer);
404  s->decode_buffer = NULL;
405  av_freep(&s->ch_ctx);
406 
407  return 0;
408 }
409 
410  #define OFFSET(x) offsetof(TTAContext, x)
411  #define DEC (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)
412  static const AVOption options[] = {
413  { "password", "Set decoding password", OFFSET(pass), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
414  { NULL },
415 };
416 
417  static const AVClass tta_decoder_class = {
418  .class_name = "TTA Decoder",
419  .item_name = av_default_item_name,
420  .option = options,
421  .version = LIBAVUTIL_VERSION_INT,
422 };
423 
424  AVCodec ff_tta_decoder = {
425  .name = "tta",
426  .long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
427  .type = AVMEDIA_TYPE_AUDIO,
428  .id = AV_CODEC_ID_TTA,
429  .priv_data_size = sizeof(TTAContext),
430  .init = tta_decode_init,
431  .close = tta_decode_close,
432  .decode = tta_decode_frame,
433  .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
434  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
435  .priv_class = &tta_decoder_class,
436 };
show_bits_long
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:405
tta_check_crc
static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
Definition: tta.c:75
NULL
#define NULL
Definition: coverity.c:32
s
const char * s
Definition: avisynth_c.h:768
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
AVOption
AVOption.
Definition: opt.h:246
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
TTAContext::ch_ctx
TTAChannel * ch_ctx
Definition: tta.c:61
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:269
init_thread_copy
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:392
ThreadFrame::f
AVFrame * f
Definition: thread.h:35
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
skip_bits_long
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:212
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
tta_decode_init
static av_cold int tta_decode_init(AVCodecContext *avctx)
Definition: tta.c:123
tta_decode_frame
static int tta_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: tta.c:219
ff_tta_rice_init
void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1)
Definition: ttadata.c:40
AVPacket::size
int size
Definition: avcodec.h:1431
TTAChannel::predictor
int32_t predictor
Definition: ttadata.h:39
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
TTAContext
Definition: tta.c:48
TTAContext::format
int format
Definition: tta.c:53
TTAContext::bps
int bps
Definition: tta.c:53
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2741
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
tta_channel_layouts
static const int64_t tta_channel_layouts[7]
Definition: tta.c:65
AVCodec
AVCodec.
Definition: avcodec.h:3408
AVCodecContext::block_align
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2210
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
TTAFilter::error
int32_t error
Definition: ttadata.h:28
filter
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:114
TTAFilter::round
int32_t round
Definition: ttadata.h:28
tta_decode_close
static av_cold int tta_decode_close(AVCodecContext *avctx)
Definition: tta.c:399
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2181
uint8_t
uint8_t
Definition: audio_convert.c:194
TTARice
Definition: ttadata.h:34
av_cold
#define av_cold
Definition: attributes.h:82
AV_SAMPLE_FMT_U8
AV_SAMPLE_FMT_U8
Definition: audio_convert.c:194
AV_CRC_32_IEEE_LE
Definition: crc.h:54
opt.h
AVOptions.
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
thread.h
Multithreading support functions.
TTAContext::dsp
TTADSPContext dsp
Definition: tta.c:62
tta_check_crc64
static uint64_t tta_check_crc64(uint8_t *pass)
Definition: tta.c:89
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1618
AV_CH_LOW_FREQUENCY
#define AV_CH_LOW_FREQUENCY
Definition: channel_layout.h:52
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
crc.h
Public header for CRC hash function implementation.
AV_OPT_TYPE_STRING
Definition: opt.h:227
AVPacket::data
uint8_t * data
Definition: avcodec.h:1430
options
static const AVOption options[]
Definition: tta.c:412
TTAFilter::qm
int32_t qm[MAX_ORDER]
Definition: ttadata.h:29
get_bits.h
bitstream reader API header.
TTAFilter::shift
int32_t shift
Definition: ttadata.h:28
ff_ttadsp_init
av_cold void ff_ttadsp_init(TTADSPContext *c)
Definition: ttadsp.c:53
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2734
TTAContext::crc_pass
uint8_t crc_pass[8]
Definition: tta.c:59
AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:62
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
U
#define U(x)
Definition: vp56_arith.h:37
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
AV_WL64
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
allocate_buffers
static int allocate_buffers(AVCodecContext *avctx)
Definition: tta.c:104
AVERROR
#define AVERROR(e)
Definition: error.h:43
ff_tta_decoder
AVCodec ff_tta_decoder
Definition: tta.c:424
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
r
const char * r
Definition: vf_curves.c:111
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CH_LAYOUT_QUAD
#define AV_CH_LAYOUT_QUAD
Definition: channel_layout.h:94
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1015
OFFSET
#define OFFSET(x)
Definition: tta.c:410
TTAContext::crc_table
const AVCRC * crc_table
Definition: tta.c:51
TTARice::sum1
uint32_t sum1
Definition: ttadata.h:35
AVCodecContext::channel_layout
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2224
pass
#define pass
Definition: fft_template.c:593
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
TTAContext::data_length
unsigned data_length
Definition: tta.c:54
ff_tta_shift_1
const uint32_t ff_tta_shift_1[]
Definition: ttadata.c:23
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2642
value
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
ff_tta_shift_16
const uint32_t *const ff_tta_shift_16
Definition: ttadata.c:36
int32_t
int32_t
Definition: audio_convert.c:194
av_crc
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:392
TTADSPContext::filter_process
void(* filter_process)(int32_t *qm, int32_t *dx, int32_t *dl, int32_t *error, int32_t *in, int32_t shift, int32_t round)
Definition: ttadsp.h:25
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2653
AV_CH_LAYOUT_5POINT1_BACK
#define AV_CH_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:98
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:59
TTARice::k1
uint32_t k1
Definition: ttadata.h:35
avcodec.h
Libavcodec external API header.
TTAContext::avctx
AVCodecContext * avctx
Definition: tta.c:50
TTAFilter
Definition: ttadata.h:27
tta_decoder_class
static const AVClass tta_decoder_class
Definition: tta.c:417
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:2173
ff_tta_filter_configs
const uint8_t ff_tta_filter_configs[]
Definition: ttadata.c:38
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:464
ff_thread_get_buffer
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:965
AVCodecContext
main external API structure.
Definition: avcodec.h:1518
TTAFilter::dx
int32_t dx[MAX_ORDER]
Definition: ttadata.h:30
buf
void * buf
Definition: avisynth_c.h:690
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1619
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AV_CODEC_ID_TTA
Definition: avcodec.h:573
DEC
#define DEC
Definition: tta.c:411
AV_EF_CRCCHECK
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data...
Definition: avcodec.h:2650
TTAContext::pass
uint8_t * pass
Definition: tta.c:60
TTAContext::frame_length
int frame_length
Definition: tta.c:55
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:354
TTAContext::last_frame_length
int last_frame_length
Definition: tta.c:55
MIN_CACHE_BITS
#define MIN_CACHE_BITS
Definition: get_bits.h:113
sign_extend
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
AV_CH_BACK_CENTER
#define AV_CH_BACK_CENTER
Definition: channel_layout.h:57
AV_CH_LAYOUT_7POINT1_WIDE
#define AV_CH_LAYOUT_7POINT1_WIDE
Definition: channel_layout.h:108
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
av_crc_get_table
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
TTARice::k0
uint32_t k0
Definition: ttadata.h:35
PRED
#define PRED(x, k)
TTAContext::channels
int channels
Definition: tta.c:53
internal.h
common internal api header.
get_unary
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:33
AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
TTAContext::decode_buffer
int32_t * decode_buffer
Definition: tta.c:57
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1545
TTAChannel::filter
TTAFilter filter
Definition: ttadata.h:40
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:2174
TTAFilter::dl
int32_t dl[MAX_ORDER]
Definition: ttadata.h:31
FORMAT_ENCRYPTED
#define FORMAT_ENCRYPTED
Definition: tta.c:46
align_get_bits
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:472
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
TTAChannel::rice
TTARice rice
Definition: ttadata.h:41
ff_tta_filter_init
void ff_tta_filter_init(TTAFilter *c, int32_t shift)
Definition: ttadata.c:48
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:284
AVCRC
uint32_t AVCRC
Definition: crc.h:47
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
TTARice::sum0
uint32_t sum0
Definition: ttadata.h:35
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
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