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wmaenc.c
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1 /*
2  * WMA compatible encoder
3  * Copyright (c) 2007 Michael Niedermayer
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/attributes.h"
23 #include "libavutil/ffmath.h"
24 
25 #include "avcodec.h"
26 #include "internal.h"
27 #include "wma.h"
28 #include "libavutil/avassert.h"
29 
30 
32 {
33  WMACodecContext *s = avctx->priv_data;
34  int i, flags1, flags2, block_align;
35  uint8_t *extradata;
36  int ret;
37 
38  s->avctx = avctx;
39 
40  if (avctx->channels > MAX_CHANNELS) {
41  av_log(avctx, AV_LOG_ERROR,
42  "too many channels: got %i, need %i or fewer\n",
43  avctx->channels, MAX_CHANNELS);
44  return AVERROR(EINVAL);
45  }
46 
47  if (avctx->sample_rate > 48000) {
48  av_log(avctx, AV_LOG_ERROR, "sample rate is too high: %d > 48kHz\n",
49  avctx->sample_rate);
50  return AVERROR(EINVAL);
51  }
52 
53  if (avctx->bit_rate < 24 * 1000) {
54  av_log(avctx, AV_LOG_ERROR,
55  "bitrate too low: got %"PRId64", need 24000 or higher\n",
56  (int64_t)avctx->bit_rate);
57  return AVERROR(EINVAL);
58  }
59 
60  /* extract flag infos */
61  flags1 = 0;
62  flags2 = 1;
63  if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
64  extradata = av_malloc(4);
65  if (!extradata)
66  return AVERROR(ENOMEM);
67  avctx->extradata_size = 4;
68  AV_WL16(extradata, flags1);
69  AV_WL16(extradata + 2, flags2);
70  } else if (avctx->codec->id == AV_CODEC_ID_WMAV2) {
71  extradata = av_mallocz(10);
72  if (!extradata)
73  return AVERROR(ENOMEM);
74  avctx->extradata_size = 10;
75  AV_WL32(extradata, flags1);
76  AV_WL16(extradata + 4, flags2);
77  } else {
78  av_assert0(0);
79  }
80  avctx->extradata = extradata;
81  s->use_exp_vlc = flags2 & 0x0001;
82  s->use_bit_reservoir = flags2 & 0x0002;
83  s->use_variable_block_len = flags2 & 0x0004;
84  if (avctx->channels == 2)
85  s->ms_stereo = 1;
86 
87  if ((ret = ff_wma_init(avctx, flags2)) < 0)
88  return ret;
89 
90  /* init MDCT */
91  for (i = 0; i < s->nb_block_sizes; i++)
92  ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 0, 1.0);
93 
94  block_align = avctx->bit_rate * (int64_t) s->frame_len /
95  (avctx->sample_rate * 8);
96  block_align = FFMIN(block_align, MAX_CODED_SUPERFRAME_SIZE);
97  avctx->block_align = block_align;
98  avctx->frame_size = avctx->initial_padding = s->frame_len;
99 
100  return 0;
101 }
102 
104 {
105  WMACodecContext *s = avctx->priv_data;
106  float **audio = (float **) frame->extended_data;
107  int len = frame->nb_samples;
108  int window_index = s->frame_len_bits - s->block_len_bits;
109  FFTContext *mdct = &s->mdct_ctx[window_index];
110  int ch;
111  const float *win = s->windows[window_index];
112  int window_len = 1 << s->block_len_bits;
113  float n = 2.0 * 32768.0 / window_len;
114 
115  for (ch = 0; ch < avctx->channels; ch++) {
116  memcpy(s->output, s->frame_out[ch], window_len * sizeof(*s->output));
117  s->fdsp->vector_fmul_scalar(s->frame_out[ch], audio[ch], n, len);
118  s->fdsp->vector_fmul_reverse(&s->output[window_len], s->frame_out[ch],
119  win, len);
120  s->fdsp->vector_fmul(s->frame_out[ch], s->frame_out[ch], win, len);
121  mdct->mdct_calc(mdct, s->coefs[ch], s->output);
122  if (!isfinite(s->coefs[ch][0])) {
123  av_log(avctx, AV_LOG_ERROR, "Input contains NaN/+-Inf\n");
124  return AVERROR(EINVAL);
125  }
126  }
127 
128  return 0;
129 }
130 
131 // FIXME use for decoding too
132 static void init_exp(WMACodecContext *s, int ch, const int *exp_param)
133 {
134  int n;
135  const uint16_t *ptr;
136  float v, *q, max_scale, *q_end;
137 
138  ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
139  q = s->exponents[ch];
140  q_end = q + s->block_len;
141  max_scale = 0;
142  while (q < q_end) {
143  /* XXX: use a table */
144  v = ff_exp10(*exp_param++ *(1.0 / 16.0));
145  max_scale = FFMAX(max_scale, v);
146  n = *ptr++;
147  do {
148  *q++ = v;
149  } while (--n);
150  }
151  s->max_exponent[ch] = max_scale;
152 }
153 
154 static void encode_exp_vlc(WMACodecContext *s, int ch, const int *exp_param)
155 {
156  int last_exp;
157  const uint16_t *ptr;
158  float *q, *q_end;
159 
160  ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
161  q = s->exponents[ch];
162  q_end = q + s->block_len;
163  if (s->version == 1) {
164  last_exp = *exp_param++;
165  av_assert0(last_exp - 10 >= 0 && last_exp - 10 < 32);
166  put_bits(&s->pb, 5, last_exp - 10);
167  q += *ptr++;
168  } else
169  last_exp = 36;
170  while (q < q_end) {
171  int exp = *exp_param++;
172  int code = exp - last_exp + 60;
173  av_assert1(code >= 0 && code < 120);
176  /* XXX: use a table */
177  q += *ptr++;
178  last_exp = exp;
179  }
180 }
181 
182 static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
183  int total_gain)
184 {
185  int v, bsize, ch, coef_nb_bits, parse_exponents;
186  float mdct_norm;
187  int nb_coefs[MAX_CHANNELS];
188  static const int fixed_exp[25] = {
189  20, 20, 20, 20, 20,
190  20, 20, 20, 20, 20,
191  20, 20, 20, 20, 20,
192  20, 20, 20, 20, 20,
193  20, 20, 20, 20, 20
194  };
195 
196  // FIXME remove duplication relative to decoder
197  if (s->use_variable_block_len) {
198  av_assert0(0); // FIXME not implemented
199  } else {
200  /* fixed block len */
204  }
205 
206  s->block_len = 1 << s->block_len_bits;
207 // av_assert0((s->block_pos + s->block_len) <= s->frame_len);
208  bsize = s->frame_len_bits - s->block_len_bits;
209 
210  // FIXME factor
211  v = s->coefs_end[bsize] - s->coefs_start;
212  for (ch = 0; ch < s->avctx->channels; ch++)
213  nb_coefs[ch] = v;
214  {
215  int n4 = s->block_len / 2;
216  mdct_norm = 1.0 / (float) n4;
217  if (s->version == 1)
218  mdct_norm *= sqrt(n4);
219  }
220 
221  if (s->avctx->channels == 2)
222  put_bits(&s->pb, 1, !!s->ms_stereo);
223 
224  for (ch = 0; ch < s->avctx->channels; ch++) {
225  // FIXME only set channel_coded when needed, instead of always
226  s->channel_coded[ch] = 1;
227  if (s->channel_coded[ch])
228  init_exp(s, ch, fixed_exp);
229  }
230 
231  for (ch = 0; ch < s->avctx->channels; ch++) {
232  if (s->channel_coded[ch]) {
233  WMACoef *coefs1;
234  float *coefs, *exponents, mult;
235  int i, n;
236 
237  coefs1 = s->coefs1[ch];
238  exponents = s->exponents[ch];
239  mult = ff_exp10(total_gain * 0.05) / s->max_exponent[ch];
240  mult *= mdct_norm;
241  coefs = src_coefs[ch];
242  if (s->use_noise_coding && 0) {
243  av_assert0(0); // FIXME not implemented
244  } else {
245  coefs += s->coefs_start;
246  n = nb_coefs[ch];
247  for (i = 0; i < n; i++) {
248  double t = *coefs++ / (exponents[i] * mult);
249  if (t < -32768 || t > 32767)
250  return -1;
251 
252  coefs1[i] = lrint(t);
253  }
254  }
255  }
256  }
257 
258  v = 0;
259  for (ch = 0; ch < s->avctx->channels; ch++) {
260  int a = s->channel_coded[ch];
261  put_bits(&s->pb, 1, a);
262  v |= a;
263  }
264 
265  if (!v)
266  return 1;
267 
268  for (v = total_gain - 1; v >= 127; v -= 127)
269  put_bits(&s->pb, 7, 127);
270  put_bits(&s->pb, 7, v);
271 
272  coef_nb_bits = ff_wma_total_gain_to_bits(total_gain);
273 
274  if (s->use_noise_coding) {
275  for (ch = 0; ch < s->avctx->channels; ch++) {
276  if (s->channel_coded[ch]) {
277  int i, n;
278  n = s->exponent_high_sizes[bsize];
279  for (i = 0; i < n; i++) {
280  put_bits(&s->pb, 1, s->high_band_coded[ch][i] = 0);
281  if (0)
282  nb_coefs[ch] -= s->exponent_high_bands[bsize][i];
283  }
284  }
285  }
286  }
287 
288  parse_exponents = 1;
289  if (s->block_len_bits != s->frame_len_bits)
290  put_bits(&s->pb, 1, parse_exponents);
291 
292  if (parse_exponents) {
293  for (ch = 0; ch < s->avctx->channels; ch++) {
294  if (s->channel_coded[ch]) {
295  if (s->use_exp_vlc) {
296  encode_exp_vlc(s, ch, fixed_exp);
297  } else {
298  av_assert0(0); // FIXME not implemented
299 // encode_exp_lsp(s, ch);
300  }
301  }
302  }
303  } else
304  av_assert0(0); // FIXME not implemented
305 
306  for (ch = 0; ch < s->avctx->channels; ch++) {
307  if (s->channel_coded[ch]) {
308  int run, tindex;
309  WMACoef *ptr, *eptr;
310  tindex = (ch == 1 && s->ms_stereo);
311  ptr = &s->coefs1[ch][0];
312  eptr = ptr + nb_coefs[ch];
313 
314  run = 0;
315  for (; ptr < eptr; ptr++) {
316  if (*ptr) {
317  int level = *ptr;
318  int abs_level = FFABS(level);
319  int code = 0;
320  if (abs_level <= s->coef_vlcs[tindex]->max_level)
321  if (run < s->coef_vlcs[tindex]->levels[abs_level - 1])
322  code = run + s->int_table[tindex][abs_level - 1];
323 
324  av_assert2(code < s->coef_vlcs[tindex]->n);
325  put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code],
326  s->coef_vlcs[tindex]->huffcodes[code]);
327 
328  if (code == 0) {
329  if (1 << coef_nb_bits <= abs_level)
330  return -1;
331 
332  put_bits(&s->pb, coef_nb_bits, abs_level);
333  put_bits(&s->pb, s->frame_len_bits, run);
334  }
335  // FIXME the sign is flipped somewhere
336  put_bits(&s->pb, 1, level < 0);
337  run = 0;
338  } else
339  run++;
340  }
341  if (run)
342  put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1],
343  s->coef_vlcs[tindex]->huffcodes[1]);
344  }
345  if (s->version == 1 && s->avctx->channels >= 2)
347  }
348  return 0;
349 }
350 
351 static int encode_frame(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
352  uint8_t *buf, int buf_size, int total_gain)
353 {
354  init_put_bits(&s->pb, buf, buf_size);
355 
356  if (s->use_bit_reservoir)
357  av_assert0(0); // FIXME not implemented
358  else if (encode_block(s, src_coefs, total_gain) < 0)
359  return INT_MAX;
360 
362 
363  return put_bits_count(&s->pb) / 8 - s->avctx->block_align;
364 }
365 
366 static int encode_superframe(AVCodecContext *avctx, AVPacket *avpkt,
367  const AVFrame *frame, int *got_packet_ptr)
368 {
369  WMACodecContext *s = avctx->priv_data;
370  int i, total_gain, ret, error;
371 
372  s->block_len_bits = s->frame_len_bits; // required by non variable block len
373  s->block_len = 1 << s->block_len_bits;
374 
375  ret = apply_window_and_mdct(avctx, frame);
376 
377  if (ret < 0)
378  return ret;
379 
380  if (s->ms_stereo) {
381  float a, b;
382  int i;
383 
384  for (i = 0; i < s->block_len; i++) {
385  a = s->coefs[0][i] * 0.5;
386  b = s->coefs[1][i] * 0.5;
387  s->coefs[0][i] = a + b;
388  s->coefs[1][i] = a - b;
389  }
390  }
391 
392  if ((ret = ff_alloc_packet2(avctx, avpkt, 2 * MAX_CODED_SUPERFRAME_SIZE, 0)) < 0)
393  return ret;
394 
395  total_gain = 128;
396  for (i = 64; i; i >>= 1) {
397  error = encode_frame(s, s->coefs, avpkt->data, avpkt->size,
398  total_gain - i);
399  if (error <= 0)
400  total_gain -= i;
401  }
402 
403  while(total_gain <= 128 && error > 0)
404  error = encode_frame(s, s->coefs, avpkt->data, avpkt->size, total_gain++);
405  if (error > 0) {
406  av_log(avctx, AV_LOG_ERROR, "Invalid input data or requested bitrate too low, cannot encode\n");
407  avpkt->size = 0;
408  return AVERROR(EINVAL);
409  }
410  av_assert0((put_bits_count(&s->pb) & 7) == 0);
411  i= avctx->block_align - (put_bits_count(&s->pb)+7)/8;
412  av_assert0(i>=0);
413  while(i--)
414  put_bits(&s->pb, 8, 'N');
415 
416  flush_put_bits(&s->pb);
417  av_assert0(put_bits_ptr(&s->pb) - s->pb.buf == avctx->block_align);
418 
419  if (frame->pts != AV_NOPTS_VALUE)
420  avpkt->pts = frame->pts - ff_samples_to_time_base(avctx, avctx->initial_padding);
421 
422  avpkt->size = avctx->block_align;
423  *got_packet_ptr = 1;
424  return 0;
425 }
426 
427 #if CONFIG_WMAV1_ENCODER
428 AVCodec ff_wmav1_encoder = {
429  .name = "wmav1",
430  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
431  .type = AVMEDIA_TYPE_AUDIO,
432  .id = AV_CODEC_ID_WMAV1,
433  .priv_data_size = sizeof(WMACodecContext),
434  .init = encode_init,
435  .encode2 = encode_superframe,
436  .close = ff_wma_end,
437  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
439 };
440 #endif
441 #if CONFIG_WMAV2_ENCODER
442 AVCodec ff_wmav2_encoder = {
443  .name = "wmav2",
444  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
445  .type = AVMEDIA_TYPE_AUDIO,
446  .id = AV_CODEC_ID_WMAV2,
447  .priv_data_size = sizeof(WMACodecContext),
448  .init = encode_init,
449  .encode2 = encode_superframe,
450  .close = ff_wma_end,
451  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
453 };
454 #endif
float, planar
Definition: samplefmt.h:69
const struct AVCodec * codec
Definition: avcodec.h:1651
const char * s
Definition: avisynth_c.h:631
static int encode_superframe(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: wmaenc.c:366
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:206
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1707
int next_block_len_bits
log2 of next block length
Definition: wma.h:105
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define BLOCK_MAX_SIZE
Definition: wma.h:35
int size
Definition: avcodec.h:1578
const char * b
Definition: vf_curves.c:109
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:49
int block_len
block length in samples
Definition: wma.h:107
const uint8_t * huffbits
VLC bit size.
Definition: wma.h:63
void(* vector_fmul_reverse)(float *dst, const float *src0, const float *src1, int len)
Calculate the entry wise product of two vectors of floats, and store the result in a vector of floats...
Definition: float_dsp.h:138
uint8_t run
Definition: svq3.c:192
float exponents[MAX_CHANNELS][BLOCK_MAX_SIZE]
Definition: wma.h:113
AVCodec.
Definition: avcodec.h:3535
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2440
Macro definitions for various function/variable attributes.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
float WMACoef
type for decoded coefficients, int16_t would be enough for wma 1/2
Definition: wma.h:57
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:264
const uint8_t ff_aac_scalefactor_bits[121]
Definition: aactab.c:82
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1757
static AVFrame * frame
const uint32_t * huffcodes
VLC bit values.
Definition: wma.h:62
uint8_t * data
Definition: avcodec.h:1577
static int encode_frame(WMACodecContext *s, float(*src_coefs)[BLOCK_MAX_SIZE], uint8_t *buf, int buf_size, int total_gain)
Definition: wmaenc.c:351
#define av_log(a,...)
int nb_block_sizes
number of block sizes
Definition: wma.h:101
int ff_wma_total_gain_to_bits(int total_gain)
Definition: wma.c:364
uint16_t * int_table[2]
Definition: wma.h:96
enum AVCodecID id
Definition: avcodec.h:3549
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
Definition: ffmath.h:42
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:227
static void encode_exp_vlc(WMACodecContext *s, int ch, const int *exp_param)
Definition: wmaenc.c:154
void(* vector_fmul)(float *dst, const float *src0, const float *src1, int len)
Calculate the entry wise product of two vectors of floats and store the result in a vector of floats...
Definition: float_dsp.h:38
#define isfinite(x)
Definition: libm.h:359
#define AVERROR(e)
Definition: error.h:43
uint16_t exponent_bands[BLOCK_NB_SIZES][25]
Definition: wma.h:79
uint8_t channel_coded[MAX_CHANNELS]
true if channel is coded
Definition: wma.h:111
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
int initial_padding
Audio only.
Definition: avcodec.h:3322
uint8_t * buf
Definition: put_bits.h:38
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3542
FFTSample output[BLOCK_MAX_SIZE *2]
Definition: wma.h:117
#define ff_mdct_init
Definition: fft.h:169
#define FFMAX(a, b)
Definition: common.h:94
int8_t exp
Definition: eval.c:64
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]
Definition: wma.h:84
int ff_wma_end(AVCodecContext *avctx)
Definition: wma.c:378
AVFloatDSPContext * fdsp
Definition: wma.h:134
Definition: fft.h:88
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define FFMIN(a, b)
Definition: common.h:96
int use_bit_reservoir
Definition: wma.h:72
#define MAX_CODED_SUPERFRAME_SIZE
Definition: wma.h:45
av_cold int ff_wma_init(AVCodecContext *avctx, int flags2)
Definition: wma.c:81
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
int version
1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
Definition: wma.h:71
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
Definition: float_dsp.h:69
int n
Definition: avisynth_c.h:547
int frame_len
frame length in samples
Definition: wma.h:99
static void init_exp(WMACodecContext *s, int ch, const int *exp_param)
Definition: wmaenc.c:132
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2423
int frame_len_bits
frame_len = 1 << frame_len_bits
Definition: wma.h:100
Libavcodec external API header.
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
int sample_rate
samples per second
Definition: avcodec.h:2403
static int apply_window_and_mdct(AVCodecContext *avctx, const AVFrame *frame)
Definition: wmaenc.c:103
int use_exp_vlc
exponent coding: 0 = lsp, 1 = vlc + delta
Definition: wma.h:74
main external API structure.
Definition: avcodec.h:1642
AVCodecContext * avctx
Definition: wma.h:68
void * buf
Definition: avisynth_c.h:553
float frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE *2]
Definition: wma.h:121
static int16_t mult(Float11 *f1, Float11 *f2)
Definition: g726.c:55
int extradata_size
Definition: avcodec.h:1758
int exponent_high_sizes[BLOCK_NB_SIZES]
Definition: wma.h:83
static int fixed_exp(int x)
Definition: aacsbr_fixed.c:112
int use_noise_coding
true if perceptual noise is added
Definition: wma.h:75
#define MAX_CHANNELS
Definition: aac.h:47
int use_variable_block_len
Definition: wma.h:73
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1683
uint8_t ms_stereo
true if mid/side stereo mode
Definition: wma.h:110
static av_cold int encode_init(AVCodecContext *avctx)
Definition: wmaenc.c:31
FFTContext mdct_ctx[BLOCK_NB_SIZES]
Definition: wma.h:118
const uint32_t ff_aac_scalefactor_code[121]
Definition: aactab.c:63
float coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]
Definition: wma.h:116
uint8_t level
Definition: svq3.c:193
int prev_block_len_bits
log2 of prev block length
Definition: wma.h:106
static int encode_block(WMACodecContext *s, float(*src_coefs)[BLOCK_MAX_SIZE], int total_gain)
Definition: wmaenc.c:182
int coefs_end[BLOCK_NB_SIZES]
max number of coded coefficients
Definition: wma.h:82
internal math functions header
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
void * priv_data
Definition: avcodec.h:1684
int len
int channels
number of audio channels
Definition: avcodec.h:2404
WMACoef coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]
Definition: wma.h:115
#define lrint
Definition: tablegen.h:53
static const CoefVLCTable coef_vlcs[6]
Definition: wmadata.h:1375
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
float max_exponent[MAX_CHANNELS]
Definition: wma.h:114
int coefs_start
first coded coef
Definition: wma.h:81
static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx, int64_t samples)
Rescale from sample rate to AVCodecContext.time_base.
Definition: internal.h:248
int block_len_bits
log2 of current block length
Definition: wma.h:104
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:227
This structure stores compressed data.
Definition: avcodec.h:1554
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:237
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]
Definition: wma.h:88
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1570
for(j=16;j >0;--j)
const CoefVLCTable * coef_vlcs[2]
Definition: wma.h:97
PutBitContext pb
Definition: wma.h:70
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
const float * windows[BLOCK_NB_SIZES]
Definition: wma.h:119