vlc: Add header #include when the types are used
[libav.git] / libavcodec / cook.c
CommitLineData
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1/*
2 * COOK compatible decoder
3 * Copyright (c) 2003 Sascha Sommer
4 * Copyright (c) 2005 Benjamin Larsson
5 *
2912e87a 6 * This file is part of Libav.
b78e7197 7 *
2912e87a 8 * Libav is free software; you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
b78e7197 11 * version 2.1 of the License, or (at your option) any later version.
e0f7e329 12 *
2912e87a 13 * Libav is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
2912e87a 19 * License along with Libav; if not, write to the Free Software
5509bffa 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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21 */
22
23/**
ba87f080 24 * @file
940d8f76 25 * Cook compatible decoder. Bastardization of the G.722.1 standard.
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26 * This decoder handles RealNetworks, RealAudio G2 data.
27 * Cook is identified by the codec name cook in RM files.
28 *
29 * To use this decoder, a calling application must supply the extradata
30 * bytes provided from the RM container; 8+ bytes for mono streams and
31 * 16+ for stereo streams (maybe more).
32 *
33 * Codec technicalities (all this assume a buffer length of 1024):
34 * Cook works with several different techniques to achieve its compression.
35 * In the timedomain the buffer is divided into 8 pieces and quantized. If
36 * two neighboring pieces have different quantization index a smooth
37 * quantization curve is used to get a smooth overlap between the different
38 * pieces.
39 * To get to the transformdomain Cook uses a modulated lapped transform.
40 * The transform domain has 50 subbands with 20 elements each. This
41 * means only a maximum of 50*20=1000 coefficients are used out of the 1024
42 * available.
43 */
44
a903f8f0 45#include "libavutil/channel_layout.h"
39b60944 46#include "libavutil/lfg.h"
9a9e2f1c
DB
47
48#include "audiodsp.h"
e0f7e329 49#include "avcodec.h"
942e84d2 50#include "bitstream.h"
862be28b 51#include "bytestream.h"
1429224b 52#include "fft.h"
594d4d5d 53#include "internal.h"
4538729a 54#include "sinewin.h"
73fc82f3 55#include "vlc.h"
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56
57#include "cookdata.h"
58
59/* the different Cook versions */
d7973906
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60#define MONO 0x1000001
61#define STEREO 0x1000002
e0f7e329 62#define JOINT_STEREO 0x1000003
c3513477 63#define MC_COOK 0x2000000 // multichannel Cook, not supported
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64
65#define SUBBAND_SIZE 20
0eec2875 66#define MAX_SUBPACKETS 5
e0f7e329 67
7f9f771e 68typedef struct cook_gains {
d0429b4f
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69 int *now;
70 int *previous;
71} cook_gains;
e0f7e329 72
7f9f771e 73typedef struct COOKSubpacket {
4a291c90 74 int ch_idx;
bdb8d996 75 int size;
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76 int num_channels;
77 int cookversion;
4a291c90
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78 int subbands;
79 int js_subband_start;
80 int js_vlc_bits;
81 int samples_per_channel;
82 int log2_numvector_size;
83 unsigned int channel_mask;
20015379 84 VLC channel_coupling;
4a291c90
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85 int joint_stereo;
86 int bits_per_subpacket;
87 int bits_per_subpdiv;
88 int total_subbands;
707f58f5 89 int numvector_size; // 1 << log2_numvector_size;
4a291c90
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90
91 float mono_previous_buffer1[1024];
92 float mono_previous_buffer2[1024];
707f58f5 93
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94 cook_gains gains1;
95 cook_gains gains2;
96 int gain_1[9];
97 int gain_2[9];
98 int gain_3[9];
99 int gain_4[9];
100} COOKSubpacket;
101
28d997f9
MH
102typedef struct cook {
103 /*
104 * The following 5 functions provide the lowlevel arithmetic on
105 * the internal audio buffers.
106 */
c3513477
SG
107 void (*scalar_dequant)(struct cook *q, int index, int quant_index,
108 int *subband_coef_index, int *subband_coef_sign,
109 float *mlt_p);
28d997f9 110
c3513477
SG
111 void (*decouple)(struct cook *q,
112 COOKSubpacket *p,
113 int subband,
114 float f1, float f2,
115 float *decode_buffer,
116 float *mlt_buffer1, float *mlt_buffer2);
28d997f9 117
c3513477
SG
118 void (*imlt_window)(struct cook *q, float *buffer1,
119 cook_gains *gains_ptr, float *previous_buffer);
28d997f9 120
c3513477
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121 void (*interpolate)(struct cook *q, float *buffer,
122 int gain_index, int gain_index_next);
28d997f9 123
cbf6ee78 124 void (*saturate_output)(struct cook *q, float *out);
28d997f9 125
d4b3d040 126 AVCodecContext* avctx;
9a9e2f1c 127 AudioDSPContext adsp;
942e84d2 128 BitstreamContext bc;
e0f7e329 129 /* stream data */
e0f7e329 130 int num_vectors;
4a291c90 131 int samples_per_channel;
e0f7e329 132 /* states */
39b60944 133 AVLFG random_state;
0eea2129 134 int discarded_packets;
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135
136 /* transform data */
01b22147 137 FFTContext mdct_ctx;
e0f7e329 138 float* mlt_window;
e0f7e329 139
e0f7e329 140 /* VLC data */
e0f7e329 141 VLC envelope_quant_index[13];
c3513477 142 VLC sqvh[7]; // scalar quantization
e0f7e329 143
41ed7ab4 144 /* generate tables and related variables */
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145 int gain_size_factor;
146 float gain_table[23];
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147
148 /* data buffers */
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149
150 uint8_t* decoded_bytes_buffer;
9d35fa52 151 DECLARE_ALIGNED(32, float, mono_mdct_output)[2048];
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152 float decode_buffer_1[1024];
153 float decode_buffer_2[1024];
8c9d2954 154 float decode_buffer_0[1060]; /* static allocation for joint decode */
dae92b62 155
29e15adc 156 const float *cplscales[5];
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157 int num_subpackets;
158 COOKSubpacket subpacket[MAX_SUBPACKETS];
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159} COOKContext;
160
0c542158
MN
161static float pow2tab[127];
162static float rootpow2tab[127];
163
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164/*************** init functions ***************/
165
166/* table generator */
c3513477
SG
167static av_cold void init_pow2table(void)
168{
e0f7e329 169 int i;
c3513477
SG
170 for (i = -63; i < 64; i++) {
171 pow2tab[63 + i] = pow(2, i);
172 rootpow2tab[63 + i] = sqrt(pow(2, i));
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173 }
174}
175
176/* table generator */
c3513477
SG
177static av_cold void init_gain_table(COOKContext *q)
178{
e0f7e329 179 int i;
c3513477
SG
180 q->gain_size_factor = q->samples_per_channel / 8;
181 for (i = 0; i < 23; i++)
182 q->gain_table[i] = pow(pow2tab[i + 52],
183 (1.0 / (double) q->gain_size_factor));
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184}
185
186
c3513477
SG
187static av_cold int init_cook_vlc_tables(COOKContext *q)
188{
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189 int i, result;
190
191 result = 0;
c3513477
SG
192 for (i = 0; i < 13; i++) {
193 result |= init_vlc(&q->envelope_quant_index[i], 9, 24,
194 envelope_quant_index_huffbits[i], 1, 1,
195 envelope_quant_index_huffcodes[i], 2, 2, 0);
e0f7e329 196 }
c3513477
SG
197 av_log(q->avctx, AV_LOG_DEBUG, "sqvh VLC init\n");
198 for (i = 0; i < 7; i++) {
199 result |= init_vlc(&q->sqvh[i], vhvlcsize_tab[i], vhsize_tab[i],
200 cvh_huffbits[i], 1, 1,
201 cvh_huffcodes[i], 2, 2, 0);
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202 }
203
c3513477
SG
204 for (i = 0; i < q->num_subpackets; i++) {
205 if (q->subpacket[i].joint_stereo == 1) {
20015379
DB
206 result |= init_vlc(&q->subpacket[i].channel_coupling, 6,
207 (1 << q->subpacket[i].js_vlc_bits) - 1,
c3513477
SG
208 ccpl_huffbits[q->subpacket[i].js_vlc_bits - 2], 1, 1,
209 ccpl_huffcodes[q->subpacket[i].js_vlc_bits - 2], 2, 2, 0);
210 av_log(q->avctx, AV_LOG_DEBUG, "subpacket %i Joint-stereo VLC used.\n", i);
4a291c90 211 }
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212 }
213
c3513477 214 av_log(q->avctx, AV_LOG_DEBUG, "VLC tables initialized.\n");
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215 return result;
216}
217
c3513477
SG
218static av_cold int init_cook_mlt(COOKContext *q)
219{
f193c96f 220 int j, ret;
e7485bf3 221 int mlt_size = q->samples_per_channel;
e0f7e329 222
e694831f 223 if ((q->mlt_window = av_malloc(mlt_size * sizeof(*q->mlt_window))) == 0)
f193c96f 224 return AVERROR(ENOMEM);
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225
226 /* Initialize the MLT window: simple sine window. */
9146e4d6 227 ff_sine_window_init(q->mlt_window, mlt_size);
c3513477 228 for (j = 0; j < mlt_size; j++)
9146e4d6 229 q->mlt_window[j] *= sqrt(2.0 / q->samples_per_channel);
e7485bf3
IB
230
231 /* Initialize the MDCT. */
c3513477 232 if ((ret = ff_mdct_init(&q->mdct_ctx, av_log2(mlt_size) + 1, 1, 1.0 / 32768.0))) {
f193c96f
JR
233 av_free(q->mlt_window);
234 return ret;
e0f7e329 235 }
c3513477
SG
236 av_log(q->avctx, AV_LOG_DEBUG, "MDCT initialized, order = %d.\n",
237 av_log2(mlt_size) + 1);
e0f7e329 238
e7485bf3 239 return 0;
e0f7e329
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240}
241
c3513477
SG
242static av_cold void init_cplscales_table(COOKContext *q)
243{
dae92b62 244 int i;
c3513477 245 for (i = 0; i < 5; i++)
8a61ba0e 246 q->cplscales[i] = cplscales[i];
dae92b62
MH
247}
248
e0f7e329
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249/*************** init functions end ***********/
250
c3513477 251#define DECODE_BYTES_PAD1(bytes) (3 - ((bytes) + 3) % 4)
34630b93
DB
252#define DECODE_BYTES_PAD2(bytes) ((bytes) % 4 + DECODE_BYTES_PAD1(2 * (bytes)))
253
e0f7e329
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254/**
255 * Cook indata decoding, every 32 bits are XORed with 0x37c511f2.
256 * Why? No idea, some checksum/error detection method maybe.
70ab75eb
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257 *
258 * Out buffer size: extra bytes are needed to cope with
df3a80b5 259 * padding/misalignment.
70ab75eb
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260 * Subpackets passed to the decoder can contain two, consecutive
261 * half-subpackets, of identical but arbitrary size.
262 * 1234 1234 1234 1234 extraA extraB
263 * Case 1: AAAA BBBB 0 0
264 * Case 2: AAAA ABBB BB-- 3 3
265 * Case 3: AAAA AABB BBBB 2 2
266 * Case 4: AAAA AAAB BBBB BB-- 1 5
267 *
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268 * Nice way to waste CPU cycles.
269 *
70ab75eb
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270 * @param inbuffer pointer to byte array of indata
271 * @param out pointer to byte array of outdata
272 * @param bytes number of bytes
e0f7e329 273 */
c3513477
SG
274static inline int decode_bytes(const uint8_t *inbuffer, uint8_t *out, int bytes)
275{
b7581b5c 276 static const uint32_t tab[4] = {
b5d2bf96
AC
277 AV_BE2NE32C(0x37c511f2u), AV_BE2NE32C(0xf237c511u),
278 AV_BE2NE32C(0x11f237c5u), AV_BE2NE32C(0xc511f237u),
b7581b5c 279 };
70ab75eb
BL
280 int i, off;
281 uint32_t c;
c3513477
SG
282 const uint32_t *buf;
283 uint32_t *obuf = (uint32_t *) out;
e0f7e329
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284 /* FIXME: 64 bit platforms would be able to do 64 bits at a time.
285 * I'm too lazy though, should be something like
c3513477
SG
286 * for (i = 0; i < bitamount / 64; i++)
287 * (int64_t) out[i] = 0x37c511f237c511f2 ^ av_be2ne64(int64_t) in[i]);
e0f7e329
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288 * Buffer alignment needs to be checked. */
289
c3513477
SG
290 off = (intptr_t) inbuffer & 3;
291 buf = (const uint32_t *) (inbuffer - off);
b7581b5c 292 c = tab[off];
70ab75eb 293 bytes += 3 + off;
c3513477 294 for (i = 0; i < bytes / 4; i++)
70ab75eb 295 obuf[i] = c ^ buf[i];
e0f7e329 296
70ab75eb 297 return off;
e0f7e329
BL
298}
299
5ef251e5 300static av_cold int cook_decode_close(AVCodecContext *avctx)
e0f7e329
BL
301{
302 int i;
303 COOKContext *q = avctx->priv_data;
c3513477 304 av_log(avctx, AV_LOG_DEBUG, "Deallocating memory.\n");
e0f7e329
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305
306 /* Free allocated memory buffers. */
307 av_free(q->mlt_window);
e0f7e329
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308 av_free(q->decoded_bytes_buffer);
309
310 /* Free the transform. */
e7485bf3 311 ff_mdct_end(&q->mdct_ctx);
e0f7e329
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312
313 /* Free the VLC tables. */
c3513477 314 for (i = 0; i < 13; i++)
e96b4a53 315 ff_free_vlc(&q->envelope_quant_index[i]);
c3513477 316 for (i = 0; i < 7; i++)
e96b4a53 317 ff_free_vlc(&q->sqvh[i]);
c3513477 318 for (i = 0; i < q->num_subpackets; i++)
20015379 319 ff_free_vlc(&q->subpacket[i].channel_coupling);
e0f7e329 320
c3513477 321 av_log(avctx, AV_LOG_DEBUG, "Memory deallocated.\n");
e0f7e329
BL
322
323 return 0;
324}
325
326/**
d0429b4f 327 * Fill the gain array for the timedomain quantization.
e0f7e329 328 *
942e84d2 329 * @param bc pointer to the BitstreamContext
ff993cd7 330 * @param gaininfo array[9] of gain indexes
e0f7e329 331 */
942e84d2 332static void decode_gain_info(BitstreamContext *bc, int *gaininfo)
d0429b4f
IB
333{
334 int i, n;
e0f7e329 335
942e84d2 336 while (bitstream_read_bit(bc)) {
c3513477
SG
337 /* NOTHING */
338 }
339
942e84d2 340 n = bitstream_tell(bc) - 1; // amount of elements * 2 to update
e0f7e329 341
d0429b4f
IB
342 i = 0;
343 while (n--) {
942e84d2
AH
344 int index = bitstream_read(bc, 3);
345 int gain = bitstream_read_bit(bc) ? bitstream_read(bc, 4) - 7 : -1;
e0f7e329 346
c3513477
SG
347 while (i <= index)
348 gaininfo[i++] = gain;
e0f7e329 349 }
c3513477
SG
350 while (i <= 8)
351 gaininfo[i++] = 0;
e0f7e329
BL
352}
353
354/**
355 * Create the quant index table needed for the envelope.
356 *
357 * @param q pointer to the COOKContext
358 * @param quant_index_table pointer to the array
359 */
97e48b2f
RB
360static int decode_envelope(COOKContext *q, COOKSubpacket *p,
361 int *quant_index_table)
c3513477
SG
362{
363 int i, j, vlc_index;
e0f7e329 364
942e84d2 365 quant_index_table[0] = bitstream_read(&q->bc, 6) - 6; // This is used later in categorize
e0f7e329 366
c3513477
SG
367 for (i = 1; i < p->total_subbands; i++) {
368 vlc_index = i;
4a291c90 369 if (i >= p->js_subband_start * 2) {
c3513477 370 vlc_index -= p->js_subband_start;
e0f7e329 371 } else {
c3513477
SG
372 vlc_index /= 2;
373 if (vlc_index < 1)
374 vlc_index = 1;
e0f7e329 375 }
c3513477
SG
376 if (vlc_index > 13)
377 vlc_index = 13; // the VLC tables >13 are identical to No. 13
e0f7e329 378
942e84d2
AH
379 j = bitstream_read_vlc(&q->bc, q->envelope_quant_index[vlc_index - 1].table,
380 q->envelope_quant_index[vlc_index - 1].bits, 2);
c3513477 381 quant_index_table[i] = quant_index_table[i - 1] + j - 12; // differential encoding
97e48b2f
RB
382 if (quant_index_table[i] > 63 || quant_index_table[i] < -63) {
383 av_log(q->avctx, AV_LOG_ERROR,
384 "Invalid quantizer %d at position %d, outside [-63, 63] range\n",
385 quant_index_table[i], i);
386 return AVERROR_INVALIDDATA;
387 }
e0f7e329 388 }
97e48b2f
RB
389
390 return 0;
e0f7e329
BL
391}
392
393/**
e0f7e329
BL
394 * Calculate the category and category_index vector.
395 *
396 * @param q pointer to the COOKContext
397 * @param quant_index_table pointer to the array
398 * @param category pointer to the category array
399 * @param category_index pointer to the category_index array
400 */
c3513477
SG
401static void categorize(COOKContext *q, COOKSubpacket *p, int *quant_index_table,
402 int *category, int *category_index)
403{
6b019970 404 int exp_idx, bias, tmpbias1, tmpbias2, bits_left, num_bits, index, v, i, j;
a92be9b8
DB
405 int exp_index2[102] = { 0 };
406 int exp_index1[102] = { 0 };
e0f7e329 407
a92be9b8 408 int tmp_categorize_array[128 * 2] = { 0 };
c3513477
SG
409 int tmp_categorize_array1_idx = p->numvector_size;
410 int tmp_categorize_array2_idx = p->numvector_size;
e0f7e329 411
942e84d2 412 bits_left = p->bits_per_subpacket - bitstream_tell(&q->bc);
e0f7e329 413
6f6b0311 414 if (bits_left > q->samples_per_channel)
e0f7e329 415 bits_left = q->samples_per_channel +
c3513477 416 ((bits_left - q->samples_per_channel) * 5) / 8;
e0f7e329 417
c3513477 418 bias = -32;
e0f7e329
BL
419
420 /* Estimate bias. */
c3513477 421 for (i = 32; i > 0; i = i / 2) {
e0f7e329 422 num_bits = 0;
c3513477
SG
423 index = 0;
424 for (j = p->total_subbands; j > 0; j--) {
a31978e9 425 exp_idx = av_clip((i - quant_index_table[index] + bias) / 2, 0, 7);
e0f7e329 426 index++;
c3513477 427 num_bits += expbits_tab[exp_idx];
e0f7e329 428 }
c3513477
SG
429 if (num_bits >= bits_left - 32)
430 bias += i;
e0f7e329
BL
431 }
432
433 /* Calculate total number of bits. */
c3513477
SG
434 num_bits = 0;
435 for (i = 0; i < p->total_subbands; i++) {
a31978e9 436 exp_idx = av_clip((bias - quant_index_table[i]) / 2, 0, 7);
e0f7e329
BL
437 num_bits += expbits_tab[exp_idx];
438 exp_index1[i] = exp_idx;
439 exp_index2[i] = exp_idx;
440 }
6b019970 441 tmpbias1 = tmpbias2 = num_bits;
e0f7e329 442
c3513477
SG
443 for (j = 1; j < p->numvector_size; j++) {
444 if (tmpbias1 + tmpbias2 > 2 * bits_left) { /* ---> */
e0f7e329 445 int max = -999999;
c3513477
SG
446 index = -1;
447 for (i = 0; i < p->total_subbands; i++) {
e0f7e329 448 if (exp_index1[i] < 7) {
c3513477
SG
449 v = (-2 * exp_index1[i]) - quant_index_table[i] + bias;
450 if (v >= max) {
451 max = v;
e0f7e329
BL
452 index = i;
453 }
454 }
455 }
c3513477
SG
456 if (index == -1)
457 break;
de8e2c1d 458 tmp_categorize_array[tmp_categorize_array1_idx++] = index;
6b019970 459 tmpbias1 -= expbits_tab[exp_index1[index]] -
c3513477 460 expbits_tab[exp_index1[index] + 1];
e0f7e329
BL
461 ++exp_index1[index];
462 } else { /* <--- */
463 int min = 999999;
c3513477
SG
464 index = -1;
465 for (i = 0; i < p->total_subbands; i++) {
466 if (exp_index2[i] > 0) {
467 v = (-2 * exp_index2[i]) - quant_index_table[i] + bias;
468 if (v < min) {
469 min = v;
e0f7e329
BL
470 index = i;
471 }
472 }
473 }
c3513477
SG
474 if (index == -1)
475 break;
de8e2c1d 476 tmp_categorize_array[--tmp_categorize_array2_idx] = index;
6b019970 477 tmpbias2 -= expbits_tab[exp_index2[index]] -
c3513477 478 expbits_tab[exp_index2[index] - 1];
e0f7e329
BL
479 --exp_index2[index];
480 }
481 }
482
c3513477 483 for (i = 0; i < p->total_subbands; i++)
e0f7e329
BL
484 category[i] = exp_index2[i];
485
c3513477 486 for (i = 0; i < p->numvector_size - 1; i++)
de8e2c1d 487 category_index[i] = tmp_categorize_array[tmp_categorize_array2_idx++];
e0f7e329
BL
488}
489
490
491/**
492 * Expand the category vector.
493 *
494 * @param q pointer to the COOKContext
495 * @param category pointer to the category array
496 * @param category_index pointer to the category_index array
497 */
c3513477
SG
498static inline void expand_category(COOKContext *q, int *category,
499 int *category_index)
500{
e0f7e329 501 int i;
c3513477 502 for (i = 0; i < q->num_vectors; i++)
442c3a8c
RB
503 {
504 int idx = category_index[i];
505 if (++category[idx] >= FF_ARRAY_ELEMS(dither_tab))
506 --category[idx];
507 }
e0f7e329
BL
508}
509
510/**
511 * The real requantization of the mltcoefs
512 *
513 * @param q pointer to the COOKContext
514 * @param index index
058ee0cf 515 * @param quant_index quantisation index
e0f7e329 516 * @param subband_coef_index array of indexes to quant_centroid_tab
baab2957 517 * @param subband_coef_sign signs of coefficients
058ee0cf 518 * @param mlt_p pointer into the mlt buffer
e0f7e329 519 */
b5f3f2b8 520static void scalar_dequant_float(COOKContext *q, int index, int quant_index,
c3513477
SG
521 int *subband_coef_index, int *subband_coef_sign,
522 float *mlt_p)
523{
e0f7e329
BL
524 int i;
525 float f1;
526
c3513477 527 for (i = 0; i < SUBBAND_SIZE; i++) {
e0f7e329 528 if (subband_coef_index[i]) {
058ee0cf 529 f1 = quant_centroid_tab[index][subband_coef_index[i]];
c3513477
SG
530 if (subband_coef_sign[i])
531 f1 = -f1;
e0f7e329 532 } else {
baab2957 533 /* noise coding if subband_coef_index[i] == 0 */
058ee0cf 534 f1 = dither_tab[index];
c3513477
SG
535 if (av_lfg_get(&q->random_state) < 0x80000000)
536 f1 = -f1;
e0f7e329 537 }
c3513477 538 mlt_p[i] = f1 * rootpow2tab[quant_index + 63];
e0f7e329
BL
539 }
540}
541/**
baab2957 542 * Unpack the subband_coef_index and subband_coef_sign vectors.
e0f7e329
BL
543 *
544 * @param q pointer to the COOKContext
545 * @param category pointer to the category array
546 * @param subband_coef_index array of indexes to quant_centroid_tab
baab2957 547 * @param subband_coef_sign signs of coefficients
e0f7e329 548 */
c3513477
SG
549static int unpack_SQVH(COOKContext *q, COOKSubpacket *p, int category,
550 int *subband_coef_index, int *subband_coef_sign)
551{
552 int i, j;
553 int vlc, vd, tmp, result;
e0f7e329
BL
554
555 vd = vd_tab[category];
556 result = 0;
c3513477 557 for (i = 0; i < vpr_tab[category]; i++) {
942e84d2
AH
558 vlc = bitstream_read_vlc(&q->bc, q->sqvh[category].table, q->sqvh[category].bits, 3);
559 if (p->bits_per_subpacket < bitstream_tell(&q->bc)) {
e0f7e329
BL
560 vlc = 0;
561 result = 1;
562 }
c3513477
SG
563 for (j = vd - 1; j >= 0; j--) {
564 tmp = (vlc * invradix_tab[category]) / 0x100000;
565 subband_coef_index[vd * i + j] = vlc - tmp * (kmax_tab[category] + 1);
e0f7e329
BL
566 vlc = tmp;
567 }
c3513477
SG
568 for (j = 0; j < vd; j++) {
569 if (subband_coef_index[i * vd + j]) {
942e84d2
AH
570 if (bitstream_tell(&q->bc) < p->bits_per_subpacket) {
571 subband_coef_sign[i * vd + j] = bitstream_read_bit(&q->bc);
e0f7e329 572 } else {
c3513477
SG
573 result = 1;
574 subband_coef_sign[i * vd + j] = 0;
e0f7e329
BL
575 }
576 } else {
c3513477 577 subband_coef_sign[i * vd + j] = 0;
e0f7e329
BL
578 }
579 }
580 }
581 return result;
582}
583
584
585/**
586 * Fill the mlt_buffer with mlt coefficients.
587 *
588 * @param q pointer to the COOKContext
589 * @param category pointer to the category array
058ee0cf 590 * @param quant_index_table pointer to the array
e0f7e329
BL
591 * @param mlt_buffer pointer to mlt coefficients
592 */
c3513477
SG
593static void decode_vectors(COOKContext *q, COOKSubpacket *p, int *category,
594 int *quant_index_table, float *mlt_buffer)
595{
e0f7e329
BL
596 /* A zero in this table means that the subband coefficient is
597 random noise coded. */
baab2957 598 int subband_coef_index[SUBBAND_SIZE];
e0f7e329
BL
599 /* A zero in this table means that the subband coefficient is a
600 positive multiplicator. */
baab2957 601 int subband_coef_sign[SUBBAND_SIZE];
e0f7e329 602 int band, j;
c3513477 603 int index = 0;
e0f7e329 604
c3513477 605 for (band = 0; band < p->total_subbands; band++) {
e0f7e329 606 index = category[band];
c3513477
SG
607 if (category[band] < 7) {
608 if (unpack_SQVH(q, p, category[band], subband_coef_index, subband_coef_sign)) {
609 index = 7;
610 for (j = 0; j < p->total_subbands; j++)
611 category[band + j] = 7;
e0f7e329
BL
612 }
613 }
c3513477 614 if (index >= 7) {
e0f7e329 615 memset(subband_coef_index, 0, sizeof(subband_coef_index));
c3513477 616 memset(subband_coef_sign, 0, sizeof(subband_coef_sign));
e0f7e329 617 }
28d997f9 618 q->scalar_dequant(q, index, quant_index_table[band],
f1639f69
MH
619 subband_coef_index, subband_coef_sign,
620 &mlt_buffer[band * SUBBAND_SIZE]);
e0f7e329
BL
621 }
622
c3513477
SG
623 /* FIXME: should this be removed, or moved into loop above? */
624 if (p->total_subbands * SUBBAND_SIZE >= q->samples_per_channel)
e0f7e329 625 return;
e0f7e329
BL
626}
627
628
97e48b2f 629static int mono_decode(COOKContext *q, COOKSubpacket *p, float *mlt_buffer)
c3513477 630{
a92be9b8
DB
631 int category_index[128] = { 0 };
632 int category[128] = { 0 };
e0f7e329 633 int quant_index_table[102];
97e48b2f 634 int res;
e0f7e329 635
97e48b2f
RB
636 if ((res = decode_envelope(q, p, quant_index_table)) < 0)
637 return res;
942e84d2 638 q->num_vectors = bitstream_read(&q->bc, p->log2_numvector_size);
4a291c90 639 categorize(q, p, quant_index_table, category, category_index);
e0f7e329 640 expand_category(q, category, category_index);
4a291c90 641 decode_vectors(q, p, category, quant_index_table, mlt_buffer);
97e48b2f
RB
642
643 return 0;
e0f7e329
BL
644}
645
646
647/**
e0f7e329
BL
648 * the actual requantization of the timedomain samples
649 *
650 * @param q pointer to the COOKContext
651 * @param buffer pointer to the timedomain buffer
652 * @param gain_index index for the block multiplier
653 * @param gain_index_next index for the next block multiplier
654 */
c3513477
SG
655static void interpolate_float(COOKContext *q, float *buffer,
656 int gain_index, int gain_index_next)
657{
e0f7e329
BL
658 int i;
659 float fc1, fc2;
c3513477
SG
660 fc1 = pow2tab[gain_index + 63];
661
662 if (gain_index == gain_index_next) { // static gain
663 for (i = 0; i < q->gain_size_factor; i++)
664 buffer[i] *= fc1;
665 } else { // smooth gain
666 fc2 = q->gain_table[11 + (gain_index_next - gain_index)];
667 for (i = 0; i < q->gain_size_factor; i++) {
668 buffer[i] *= fc1;
669 fc1 *= fc2;
e0f7e329 670 }
e0f7e329
BL
671 }
672}
673
e66442f4
MH
674/**
675 * Apply transform window, overlap buffers.
676 *
677 * @param q pointer to the COOKContext
65e3f89f 678 * @param inbuffer pointer to the mltcoefficients
e66442f4
MH
679 * @param gains_ptr current and previous gains
680 * @param previous_buffer pointer to the previous buffer to be used for overlapping
681 */
c3513477
SG
682static void imlt_window_float(COOKContext *q, float *inbuffer,
683 cook_gains *gains_ptr, float *previous_buffer)
e66442f4 684{
0c542158 685 const float fc = pow2tab[gains_ptr->previous[0] + 63];
e66442f4
MH
686 int i;
687 /* The weird thing here, is that the two halves of the time domain
688 * buffer are swapped. Also, the newest data, that we save away for
689 * next frame, has the wrong sign. Hence the subtraction below.
690 * Almost sounds like a complex conjugate/reverse data/FFT effect.
691 */
692
693 /* Apply window and overlap */
c3513477 694 for (i = 0; i < q->samples_per_channel; i++)
65e3f89f 695 inbuffer[i] = inbuffer[i] * fc * q->mlt_window[i] -
c3513477 696 previous_buffer[i] * q->mlt_window[q->samples_per_channel - 1 - i];
e66442f4 697}
e0f7e329
BL
698
699/**
85e7386a
IB
700 * The modulated lapped transform, this takes transform coefficients
701 * and transforms them into timedomain samples.
702 * Apply transform window, overlap buffers, apply gain profile
703 * and buffer management.
e0f7e329
BL
704 *
705 * @param q pointer to the COOKContext
85e7386a 706 * @param inbuffer pointer to the mltcoefficients
d0429b4f 707 * @param gains_ptr current and previous gains
e0f7e329 708 * @param previous_buffer pointer to the previous buffer to be used for overlapping
e0f7e329 709 */
85e7386a 710static void imlt_gain(COOKContext *q, float *inbuffer,
c3513477 711 cook_gains *gains_ptr, float *previous_buffer)
d0429b4f 712{
85e7386a
IB
713 float *buffer0 = q->mono_mdct_output;
714 float *buffer1 = q->mono_mdct_output + q->samples_per_channel;
e0f7e329 715 int i;
e0f7e329 716
85e7386a 717 /* Inverse modified discrete cosine transform */
26f548bb 718 q->mdct_ctx.imdct_calc(&q->mdct_ctx, q->mono_mdct_output, inbuffer);
85e7386a 719
c3513477 720 q->imlt_window(q, buffer1, gains_ptr, previous_buffer);
d0429b4f
IB
721
722 /* Apply gain profile */
c3513477 723 for (i = 0; i < 8; i++)
d0429b4f 724 if (gains_ptr->now[i] || gains_ptr->now[i + 1])
28d997f9 725 q->interpolate(q, &buffer1[q->gain_size_factor * i],
f1639f69 726 gains_ptr->now[i], gains_ptr->now[i + 1]);
e0f7e329
BL
727
728 /* Save away the current to be previous block. */
e694831f
JR
729 memcpy(previous_buffer, buffer0,
730 q->samples_per_channel * sizeof(*previous_buffer));
e0f7e329
BL
731}
732
733
734/**
735 * function for getting the jointstereo coupling information
736 *
737 * @param q pointer to the COOKContext
738 * @param decouple_tab decoupling array
e0f7e329 739 */
c9c841e2
JR
740static void decouple_info(COOKContext *q, COOKSubpacket *p, int *decouple_tab)
741{
742 int i;
942e84d2 743 int vlc = bitstream_read_bit(&q->bc);
c9c841e2 744 int start = cplband[p->js_subband_start];
c3513477 745 int end = cplband[p->subbands - 1];
c9c841e2 746 int length = end - start + 1;
e0f7e329 747
c9c841e2 748 if (start > end)
e0f7e329 749 return;
e0f7e329 750
c3513477 751 if (vlc)
c9c841e2 752 for (i = 0; i < length; i++)
942e84d2
AH
753 decouple_tab[start + i] =
754 bitstream_read_vlc(&q->bc,
755 p->channel_coupling.table,
756 p->channel_coupling.bits, 2);
c3513477 757 else
c9c841e2 758 for (i = 0; i < length; i++)
942e84d2 759 decouple_tab[start + i] = bitstream_read(&q->bc, p->js_vlc_bits);
e0f7e329
BL
760}
761
dc0c20f9
MH
762/*
763 * function decouples a pair of signals from a single signal via multiplication.
764 *
765 * @param q pointer to the COOKContext
766 * @param subband index of the current subband
767 * @param f1 multiplier for channel 1 extraction
768 * @param f2 multiplier for channel 2 extraction
769 * @param decode_buffer input buffer
770 * @param mlt_buffer1 pointer to left channel mlt coefficients
771 * @param mlt_buffer2 pointer to right channel mlt coefficients
772 */
c3513477
SG
773static void decouple_float(COOKContext *q,
774 COOKSubpacket *p,
775 int subband,
776 float f1, float f2,
777 float *decode_buffer,
778 float *mlt_buffer1, float *mlt_buffer2)
dc0c20f9
MH
779{
780 int j, tmp_idx;
c3513477
SG
781 for (j = 0; j < SUBBAND_SIZE; j++) {
782 tmp_idx = ((p->js_subband_start + subband) * SUBBAND_SIZE) + j;
783 mlt_buffer1[SUBBAND_SIZE * subband + j] = f1 * decode_buffer[tmp_idx];
784 mlt_buffer2[SUBBAND_SIZE * subband + j] = f2 * decode_buffer[tmp_idx];
dc0c20f9
MH
785 }
786}
e0f7e329
BL
787
788/**
789 * function for decoding joint stereo data
790 *
791 * @param q pointer to the COOKContext
792 * @param mlt_buffer1 pointer to left channel mlt coefficients
793 * @param mlt_buffer2 pointer to right channel mlt coefficients
794 */
f23b4a06
DB
795static int joint_decode(COOKContext *q, COOKSubpacket *p,
796 float *mlt_buffer_left, float *mlt_buffer_right)
c3513477 797{
97e48b2f 798 int i, j, res;
a92be9b8 799 int decouple_tab[SUBBAND_SIZE] = { 0 };
8c9d2954 800 float *decode_buffer = q->decode_buffer_0;
31991973 801 int idx, cpl_tmp;
c3513477
SG
802 float f1, f2;
803 const float *cplscale;
e0f7e329 804
e694831f 805 memset(decode_buffer, 0, sizeof(q->decode_buffer_0));
e0f7e329
BL
806
807 /* Make sure the buffers are zeroed out. */
f23b4a06
DB
808 memset(mlt_buffer_left, 0, 1024 * sizeof(*mlt_buffer_left));
809 memset(mlt_buffer_right, 0, 1024 * sizeof(*mlt_buffer_right));
4a291c90 810 decouple_info(q, p, decouple_tab);
97e48b2f
RB
811 if ((res = mono_decode(q, p, decode_buffer)) < 0)
812 return res;
e0f7e329
BL
813
814 /* The two channels are stored interleaved in decode_buffer. */
c3513477
SG
815 for (i = 0; i < p->js_subband_start; i++) {
816 for (j = 0; j < SUBBAND_SIZE; j++) {
f23b4a06
DB
817 mlt_buffer_left[i * 20 + j] = decode_buffer[i * 40 + j];
818 mlt_buffer_right[i * 20 + j] = decode_buffer[i * 40 + 20 + j];
e0f7e329
BL
819 }
820 }
821
822 /* When we reach js_subband_start (the higher frequencies)
823 the coefficients are stored in a coupling scheme. */
4a291c90 824 idx = (1 << p->js_vlc_bits) - 1;
c3513477 825 for (i = p->js_subband_start; i < p->subbands; i++) {
70220035 826 cpl_tmp = cplband[i];
c3513477
SG
827 idx -= decouple_tab[cpl_tmp];
828 cplscale = q->cplscales[p->js_vlc_bits - 2]; // choose decoupler table
37cc8600
RB
829 f1 = cplscale[decouple_tab[cpl_tmp] + 1];
830 f2 = cplscale[idx];
f23b4a06
DB
831 q->decouple(q, p, i, f1, f2, decode_buffer,
832 mlt_buffer_left, mlt_buffer_right);
4a291c90 833 idx = (1 << p->js_vlc_bits) - 1;
e0f7e329 834 }
97e48b2f
RB
835
836 return 0;
e0f7e329
BL
837}
838
839/**
70ab75eb
BL
840 * First part of subpacket decoding:
841 * decode raw stream bytes and read gain info.
842 *
843 * @param q pointer to the COOKContext
844 * @param inbuffer pointer to raw stream data
9a58234f 845 * @param gains_ptr array of current/prev gain pointers
70ab75eb 846 */
c3513477
SG
847static inline void decode_bytes_and_gain(COOKContext *q, COOKSubpacket *p,
848 const uint8_t *inbuffer,
849 cook_gains *gains_ptr)
70ab75eb
BL
850{
851 int offset;
852
853 offset = decode_bytes(inbuffer, q->decoded_bytes_buffer,
c3513477 854 p->bits_per_subpacket / 8);
942e84d2
AH
855 bitstream_init(&q->bc, q->decoded_bytes_buffer + offset,
856 p->bits_per_subpacket);
857 decode_gain_info(&q->bc, gains_ptr->now);
a5b8a69c
BL
858
859 /* Swap current and previous gains */
d0429b4f 860 FFSWAP(int *, gains_ptr->now, gains_ptr->previous);
a5b8a69c
BL
861}
862
c3513477 863/**
c25df223 864 * Saturate the output signal and interleave.
29b4b835
MH
865 *
866 * @param q pointer to the COOKContext
29b4b835
MH
867 * @param out pointer to the output vector
868 */
cbf6ee78 869static void saturate_output_float(COOKContext *q, float *out)
29b4b835 870{
9a9e2f1c 871 q->adsp.vector_clipf(out, q->mono_mdct_output + q->samples_per_channel,
683da86a 872 FFALIGN(q->samples_per_channel, 8), -1.0f, 1.0f);
29b4b835
MH
873}
874
cbf6ee78 875
a5b8a69c
BL
876/**
877 * Final part of subpacket decoding:
878 * Apply modulated lapped transform, gain compensation,
879 * clip and convert to integer.
880 *
881 * @param q pointer to the COOKContext
882 * @param decode_buffer pointer to the mlt coefficients
65e3f89f 883 * @param gains_ptr array of current/prev gain pointers
a5b8a69c
BL
884 * @param previous_buffer pointer to the previous buffer to be used for overlapping
885 * @param out pointer to the output buffer
a5b8a69c 886 */
c3513477
SG
887static inline void mlt_compensate_output(COOKContext *q, float *decode_buffer,
888 cook_gains *gains_ptr, float *previous_buffer,
cbf6ee78 889 float *out)
a5b8a69c 890{
65e3f89f 891 imlt_gain(q, decode_buffer, gains_ptr, previous_buffer);
0eea2129 892 if (out)
cbf6ee78 893 q->saturate_output(q, out);
70ab75eb
BL
894}
895
896
897/**
e0f7e329
BL
898 * Cook subpacket decoding. This function returns one decoded subpacket,
899 * usually 1024 samples per channel.
900 *
901 * @param q pointer to the COOKContext
902 * @param inbuffer pointer to the inbuffer
e0f7e329 903 * @param outbuffer pointer to the outbuffer
e0f7e329 904 */
97e48b2f 905static int decode_subpacket(COOKContext *q, COOKSubpacket *p,
cbf6ee78 906 const uint8_t *inbuffer, float **outbuffer)
c25df223 907{
4a291c90 908 int sub_packet_size = p->size;
97e48b2f 909 int res;
6f6b0311 910
c3513477 911 memset(q->decode_buffer_1, 0, sizeof(q->decode_buffer_1));
4a291c90 912 decode_bytes_and_gain(q, p, inbuffer, &p->gains1);
e0f7e329 913
4a291c90 914 if (p->joint_stereo) {
97e48b2f
RB
915 if ((res = joint_decode(q, p, q->decode_buffer_1, q->decode_buffer_2)) < 0)
916 return res;
a5b8a69c 917 } else {
97e48b2f
RB
918 if ((res = mono_decode(q, p, q->decode_buffer_1)) < 0)
919 return res;
b7c24ff6 920
4a291c90 921 if (p->num_channels == 2) {
c3513477 922 decode_bytes_and_gain(q, p, inbuffer + sub_packet_size / 2, &p->gains2);
97e48b2f
RB
923 if ((res = mono_decode(q, p, q->decode_buffer_2)) < 0)
924 return res;
a5b8a69c
BL
925 }
926 }
560b10a6 927
4a291c90 928 mlt_compensate_output(q, q->decode_buffer_1, &p->gains1,
cbf6ee78
JR
929 p->mono_previous_buffer1,
930 outbuffer ? outbuffer[p->ch_idx] : NULL);
4a291c90 931
c3513477
SG
932 if (p->num_channels == 2)
933 if (p->joint_stereo)
4a291c90 934 mlt_compensate_output(q, q->decode_buffer_2, &p->gains1,
cbf6ee78
JR
935 p->mono_previous_buffer2,
936 outbuffer ? outbuffer[p->ch_idx + 1] : NULL);
c3513477 937 else
4a291c90 938 mlt_compensate_output(q, q->decode_buffer_2, &p->gains2,
cbf6ee78
JR
939 p->mono_previous_buffer2,
940 outbuffer ? outbuffer[p->ch_idx + 1] : NULL);
97e48b2f
RB
941
942 return 0;
e0f7e329
BL
943}
944
945
0eea2129
JR
946static int cook_decode_frame(AVCodecContext *avctx, void *data,
947 int *got_frame_ptr, AVPacket *avpkt)
948{
7b783215 949 AVFrame *frame = data;
7a00bbad
TB
950 const uint8_t *buf = avpkt->data;
951 int buf_size = avpkt->size;
e0f7e329 952 COOKContext *q = avctx->priv_data;
cbf6ee78 953 float **samples = NULL;
0eea2129 954 int i, ret;
4a291c90
BL
955 int offset = 0;
956 int chidx = 0;
e0f7e329
BL
957
958 if (buf_size < avctx->block_align)
959 return buf_size;
960
0eea2129
JR
961 /* get output buffer */
962 if (q->discarded_packets >= 2) {
7b783215 963 frame->nb_samples = q->samples_per_channel;
759001c5 964 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
0eea2129
JR
965 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
966 return ret;
967 }
7b783215 968 samples = (float **)frame->extended_data;
e34c6c97
JR
969 }
970
4a291c90
BL
971 /* estimate subpacket sizes */
972 q->subpacket[0].size = avctx->block_align;
973
c3513477 974 for (i = 1; i < q->num_subpackets; i++) {
da75426b 975 q->subpacket[i].size = 2 * buf[avctx->block_align - q->num_subpackets + i];
bb1135c8 976 q->subpacket[0].size -= q->subpacket[i].size + 1;
bdb8d996 977 if (q->subpacket[0].size < 0) {
c3513477
SG
978 av_log(avctx, AV_LOG_DEBUG,
979 "frame subpacket size total > avctx->block_align!\n");
f193c96f 980 return AVERROR_INVALIDDATA;
bdb8d996 981 }
da75426b 982 }
67da3182 983
4a291c90 984 /* decode supbackets */
c3513477
SG
985 for (i = 0; i < q->num_subpackets; i++) {
986 q->subpacket[i].bits_per_subpacket = (q->subpacket[i].size * 8) >>
987 q->subpacket[i].bits_per_subpdiv;
4a291c90 988 q->subpacket[i].ch_idx = chidx;
c3513477
SG
989 av_log(avctx, AV_LOG_DEBUG,
990 "subpacket[%i] size %i js %i %i block_align %i\n",
991 i, q->subpacket[i].size, q->subpacket[i].joint_stereo, offset,
992 avctx->block_align);
993
97e48b2f
RB
994 if ((ret = decode_subpacket(q, &q->subpacket[i], buf + offset, samples)) < 0)
995 return ret;
4a291c90
BL
996 offset += q->subpacket[i].size;
997 chidx += q->subpacket[i].num_channels;
c3513477 998 av_log(avctx, AV_LOG_DEBUG, "subpacket[%i] %i %i\n",
942e84d2 999 i, q->subpacket[i].size * 8, bitstream_tell(&q->bc));
4a291c90 1000 }
e0f7e329 1001
4ff5e656 1002 /* Discard the first two frames: no valid audio. */
0eea2129
JR
1003 if (q->discarded_packets < 2) {
1004 q->discarded_packets++;
1005 *got_frame_ptr = 0;
1006 return avctx->block_align;
1007 }
1008
7b783215 1009 *got_frame_ptr = 1;
4ff5e656 1010
e0f7e329
BL
1011 return avctx->block_align;
1012}
7f129a33 1013
f190f676 1014#ifdef DEBUG
862be28b 1015static void dump_cook_context(COOKContext *q)
e0f7e329
BL
1016{
1017 //int i=0;
6a85dfc8
VG
1018#define PRINT(a, b) ff_dlog(q->avctx, " %s = %d\n", a, b);
1019 ff_dlog(q->avctx, "COOKextradata\n");
1020 ff_dlog(q->avctx, "cookversion=%x\n", q->subpacket[0].cookversion);
7204850e 1021 if (q->subpacket[0].cookversion > STEREO) {
c3513477
SG
1022 PRINT("js_subband_start", q->subpacket[0].js_subband_start);
1023 PRINT("js_vlc_bits", q->subpacket[0].js_vlc_bits);
e0f7e329 1024 }
6a85dfc8 1025 ff_dlog(q->avctx, "COOKContext\n");
3509eee1 1026 PRINT("nb_channels", q->avctx->channels);
8aa5b8c5 1027 PRINT("bit_rate", q->avctx->bit_rate);
926e9d28 1028 PRINT("sample_rate", q->avctx->sample_rate);
c3513477 1029 PRINT("samples_per_channel", q->subpacket[0].samples_per_channel);
c3513477
SG
1030 PRINT("subbands", q->subpacket[0].subbands);
1031 PRINT("js_subband_start", q->subpacket[0].js_subband_start);
1032 PRINT("log2_numvector_size", q->subpacket[0].log2_numvector_size);
1033 PRINT("numvector_size", q->subpacket[0].numvector_size);
1034 PRINT("total_subbands", q->subpacket[0].total_subbands);
e0f7e329
BL
1035}
1036#endif
7f129a33 1037
e0f7e329
BL
1038/**
1039 * Cook initialization
1040 *
1041 * @param avctx pointer to the AVCodecContext
1042 */
4b81366b 1043static av_cold int cook_decode_init(AVCodecContext *avctx)
e0f7e329 1044{
e0f7e329 1045 COOKContext *q = avctx->priv_data;
409d1cd2 1046 GetByteContext gb;
4a291c90 1047 int s = 0;
67da3182 1048 unsigned int channel_mask = 0;
8f173ef0 1049 int samples_per_frame;
f193c96f 1050 int ret;
d4b3d040 1051 q->avctx = avctx;
e0f7e329
BL
1052
1053 /* Take care of the codec specific extradata. */
409d1cd2 1054 if (avctx->extradata_size < 8) {
c3513477 1055 av_log(avctx, AV_LOG_ERROR, "Necessary extradata missing!\n");
f193c96f 1056 return AVERROR_INVALIDDATA;
e0f7e329 1057 }
c3513477 1058 av_log(avctx, AV_LOG_DEBUG, "codecdata_length=%d\n", avctx->extradata_size);
e0f7e329 1059
409d1cd2
AK
1060 bytestream2_init(&gb, avctx->extradata, avctx->extradata_size);
1061
e0f7e329 1062 /* Take data from the AVCodecContext (RM container). */
3509eee1 1063 if (!avctx->channels) {
941fc1ea
RB
1064 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
1065 return AVERROR_INVALIDDATA;
1066 }
e0f7e329 1067
058ee0cf 1068 /* Initialize RNG. */
2d2e72b1 1069 av_lfg_init(&q->random_state, 0);
e0f7e329 1070
9a9e2f1c 1071 ff_audiodsp_init(&q->adsp);
cbf6ee78 1072
409d1cd2 1073 while (bytestream2_get_bytes_left(&gb)) {
4a291c90
BL
1074 /* 8 for mono, 16 for stereo, ? for multichannel
1075 Swap to right endianness so we don't need to care later on. */
409d1cd2
AK
1076 q->subpacket[s].cookversion = bytestream2_get_be32(&gb);
1077 samples_per_frame = bytestream2_get_be16(&gb);
1078 q->subpacket[s].subbands = bytestream2_get_be16(&gb);
1079 bytestream2_get_be32(&gb); // Unknown unused
1080 q->subpacket[s].js_subband_start = bytestream2_get_be16(&gb);
1081 q->subpacket[s].js_vlc_bits = bytestream2_get_be16(&gb);
4a291c90
BL
1082
1083 /* Initialize extradata related variables. */
8f173ef0 1084 q->subpacket[s].samples_per_channel = samples_per_frame / avctx->channels;
4a291c90
BL
1085 q->subpacket[s].bits_per_subpacket = avctx->block_align * 8;
1086
1087 /* Initialize default data states. */
1088 q->subpacket[s].log2_numvector_size = 5;
1089 q->subpacket[s].total_subbands = q->subpacket[s].subbands;
1090 q->subpacket[s].num_channels = 1;
1091
1092 /* Initialize version-dependent variables */
1093
c3513477
SG
1094 av_log(avctx, AV_LOG_DEBUG, "subpacket[%i].cookversion=%x\n", s,
1095 q->subpacket[s].cookversion);
4a291c90
BL
1096 q->subpacket[s].joint_stereo = 0;
1097 switch (q->subpacket[s].cookversion) {
c3513477 1098 case MONO:
3509eee1 1099 if (avctx->channels != 1) {
6d97484d 1100 avpriv_request_sample(avctx, "Container channels != 1");
c3513477
SG
1101 return AVERROR_PATCHWELCOME;
1102 }
1103 av_log(avctx, AV_LOG_DEBUG, "MONO\n");
1104 break;
1105 case STEREO:
3509eee1 1106 if (avctx->channels != 1) {
c3513477
SG
1107 q->subpacket[s].bits_per_subpdiv = 1;
1108 q->subpacket[s].num_channels = 2;
1109 }
1110 av_log(avctx, AV_LOG_DEBUG, "STEREO\n");
1111 break;
1112 case JOINT_STEREO:
3509eee1 1113 if (avctx->channels != 2) {
6d97484d 1114 avpriv_request_sample(avctx, "Container channels != 2");
c3513477
SG
1115 return AVERROR_PATCHWELCOME;
1116 }
1117 av_log(avctx, AV_LOG_DEBUG, "JOINT_STEREO\n");
1118 if (avctx->extradata_size >= 16) {
1119 q->subpacket[s].total_subbands = q->subpacket[s].subbands +
1120 q->subpacket[s].js_subband_start;
1121 q->subpacket[s].joint_stereo = 1;
1122 q->subpacket[s].num_channels = 2;
1123 }
1124 if (q->subpacket[s].samples_per_channel > 256) {
1125 q->subpacket[s].log2_numvector_size = 6;
1126 }
1127 if (q->subpacket[s].samples_per_channel > 512) {
1128 q->subpacket[s].log2_numvector_size = 7;
1129 }
1130 break;
1131 case MC_COOK:
1132 av_log(avctx, AV_LOG_DEBUG, "MULTI_CHANNEL\n");
409d1cd2 1133 channel_mask |= q->subpacket[s].channel_mask = bytestream2_get_be32(&gb);
c3513477 1134
7efbba2e 1135 if (av_get_channel_layout_nb_channels(q->subpacket[s].channel_mask) > 1) {
c3513477
SG
1136 q->subpacket[s].total_subbands = q->subpacket[s].subbands +
1137 q->subpacket[s].js_subband_start;
1138 q->subpacket[s].joint_stereo = 1;
1139 q->subpacket[s].num_channels = 2;
8f173ef0 1140 q->subpacket[s].samples_per_channel = samples_per_frame >> 1;
c3513477 1141
4a291c90 1142 if (q->subpacket[s].samples_per_channel > 256) {
c3513477 1143 q->subpacket[s].log2_numvector_size = 6;
4a291c90
BL
1144 }
1145 if (q->subpacket[s].samples_per_channel > 512) {
c3513477 1146 q->subpacket[s].log2_numvector_size = 7;
4a291c90 1147 }
c3513477 1148 } else
8f173ef0 1149 q->subpacket[s].samples_per_channel = samples_per_frame;
67da3182 1150
c3513477
SG
1151 break;
1152 default:
6d97484d
DB
1153 avpriv_request_sample(avctx, "Cook version %d",
1154 q->subpacket[s].cookversion);
c3513477 1155 return AVERROR_PATCHWELCOME;
4a291c90
BL
1156 }
1157
c3513477
SG
1158 if (s > 1 && q->subpacket[s].samples_per_channel != q->samples_per_channel) {
1159 av_log(avctx, AV_LOG_ERROR, "different number of samples per channel!\n");
f193c96f 1160 return AVERROR_INVALIDDATA;
4a291c90
BL
1161 } else
1162 q->samples_per_channel = q->subpacket[0].samples_per_channel;
1163
1164
1165 /* Initialize variable relations */
1166 q->subpacket[s].numvector_size = (1 << q->subpacket[s].log2_numvector_size);
1167
41ed7ab4 1168 /* Try to catch some obviously faulty streams, otherwise it might be exploitable */
4a291c90 1169 if (q->subpacket[s].total_subbands > 53) {
6d97484d 1170 avpriv_request_sample(avctx, "total_subbands > 53");
5c353eb8 1171 return AVERROR_PATCHWELCOME;
4a291c90
BL
1172 }
1173
c3513477
SG
1174 if ((q->subpacket[s].js_vlc_bits > 6) ||
1175 (q->subpacket[s].js_vlc_bits < 2 * q->subpacket[s].joint_stereo)) {
1176 av_log(avctx, AV_LOG_ERROR, "js_vlc_bits = %d, only >= %d and <= 6 allowed!\n",
1177 q->subpacket[s].js_vlc_bits, 2 * q->subpacket[s].joint_stereo);
f193c96f 1178 return AVERROR_INVALIDDATA;
4a291c90 1179 }
e0f7e329 1180
4a291c90 1181 if (q->subpacket[s].subbands > 50) {
6d97484d 1182 avpriv_request_sample(avctx, "subbands > 50");
5c353eb8 1183 return AVERROR_PATCHWELCOME;
4a291c90
BL
1184 }
1185 q->subpacket[s].gains1.now = q->subpacket[s].gain_1;
1186 q->subpacket[s].gains1.previous = q->subpacket[s].gain_2;
1187 q->subpacket[s].gains2.now = q->subpacket[s].gain_3;
1188 q->subpacket[s].gains2.previous = q->subpacket[s].gain_4;
e0f7e329 1189
4a291c90
BL
1190 q->num_subpackets++;
1191 s++;
ec32cfd2 1192 if (s > MAX_SUBPACKETS) {
6d97484d 1193 avpriv_request_sample(avctx, "subpackets > %d", MAX_SUBPACKETS);
5c353eb8 1194 return AVERROR_PATCHWELCOME;
ec32cfd2 1195 }
4a291c90 1196 }
e0f7e329 1197 /* Generate tables */
0c542158 1198 init_pow2table();
e0f7e329 1199 init_gain_table(q);
dae92b62 1200 init_cplscales_table(q);
e0f7e329 1201
f193c96f
JR
1202 if ((ret = init_cook_vlc_tables(q)))
1203 return ret;
e0f7e329 1204
3a1a7e32 1205
c3513477 1206 if (avctx->block_align >= UINT_MAX / 2)
f193c96f 1207 return AVERROR(EINVAL);
3a1a7e32 1208
70ab75eb
BL
1209 /* Pad the databuffer with:
1210 DECODE_BYTES_PAD1 or DECODE_BYTES_PAD2 for decode_bytes(),
059a9348 1211 AV_INPUT_BUFFER_PADDING_SIZE, for the bitstreamreader. */
c3513477
SG
1212 q->decoded_bytes_buffer =
1213 av_mallocz(avctx->block_align
1214 + DECODE_BYTES_PAD1(avctx->block_align)
059a9348 1215 + AV_INPUT_BUFFER_PADDING_SIZE);
f929ab05 1216 if (!q->decoded_bytes_buffer)
f193c96f 1217 return AVERROR(ENOMEM);
e0f7e329 1218
e0f7e329 1219 /* Initialize transform. */
f193c96f
JR
1220 if ((ret = init_cook_mlt(q)))
1221 return ret;
560b10a6 1222
28d997f9
MH
1223 /* Initialize COOK signal arithmetic handling */
1224 if (1) {
b5f3f2b8 1225 q->scalar_dequant = scalar_dequant_float;
28d997f9
MH
1226 q->decouple = decouple_float;
1227 q->imlt_window = imlt_window_float;
b5f3f2b8 1228 q->interpolate = interpolate_float;
28d997f9
MH
1229 q->saturate_output = saturate_output_float;
1230 }
1231
41ed7ab4 1232 /* Try to catch some obviously faulty streams, otherwise it might be exploitable */
d21b2e47
JR
1233 if (q->samples_per_channel != 256 && q->samples_per_channel != 512 &&
1234 q->samples_per_channel != 1024) {
6d97484d 1235 avpriv_request_sample(avctx, "samples_per_channel = %d",
d9dee728 1236 q->samples_per_channel);
5c353eb8 1237 return AVERROR_PATCHWELCOME;
2e9c78d3 1238 }
560b10a6 1239
cbf6ee78 1240 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
67da3182
BL
1241 if (channel_mask)
1242 avctx->channel_layout = channel_mask;
1243 else
c3513477 1244 avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
fd76c37f 1245
f190f676 1246#ifdef DEBUG
862be28b 1247 dump_cook_context(q);
70220035 1248#endif
e0f7e329
BL
1249 return 0;
1250}
1251
c3513477
SG
1252AVCodec ff_cook_decoder = {
1253 .name = "cook",
b2bed932 1254 .long_name = NULL_IF_CONFIG_SMALL("Cook / Cooker / Gecko (RealAudio G2)"),
c3513477 1255 .type = AVMEDIA_TYPE_AUDIO,
36ef5369 1256 .id = AV_CODEC_ID_COOK,
e0f7e329 1257 .priv_data_size = sizeof(COOKContext),
c3513477
SG
1258 .init = cook_decode_init,
1259 .close = cook_decode_close,
1260 .decode = cook_decode_frame,
def97856 1261 .capabilities = AV_CODEC_CAP_DR1,
cbf6ee78
JR
1262 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1263 AV_SAMPLE_FMT_NONE },
e0f7e329 1264};