Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 1 | /* |
| 2 | * RKA decoder |
| 3 | * Copyright (c) 2023 Paul B Mahol |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "libavutil/channel_layout.h" |
| 23 | #include "libavutil/intreadwrite.h" |
| 24 | |
| 25 | #include "avcodec.h" |
| 26 | #include "codec_internal.h" |
| 27 | #include "bytestream.h" |
| 28 | #include "decode.h" |
| 29 | |
| 30 | typedef struct ACoder { |
| 31 | GetByteContext gb; |
| 32 | uint32_t low, high; |
| 33 | uint32_t value; |
| 34 | } ACoder; |
| 35 | |
| 36 | typedef struct FiltCoeffs { |
| 37 | int32_t coeffs[257]; |
| 38 | unsigned size; |
| 39 | } FiltCoeffs; |
| 40 | |
| 41 | typedef struct Model64 { |
| 42 | uint32_t zero[2]; |
| 43 | uint32_t sign[2]; |
| 44 | unsigned size; |
| 45 | int bits; |
| 46 | |
| 47 | uint16_t val4[65]; |
| 48 | uint16_t val1[65]; |
| 49 | } Model64; |
| 50 | |
| 51 | typedef struct AdaptiveModel { |
| 52 | int last; |
| 53 | int total; |
| 54 | int buf_size; |
| 55 | int16_t sum; |
| 56 | uint16_t aprob0; |
| 57 | uint16_t aprob1; |
| 58 | uint16_t *prob[2]; |
| 59 | } AdaptiveModel; |
| 60 | |
| 61 | typedef struct ChContext { |
| 62 | int cmode; |
| 63 | int cmode2; |
| 64 | int last_nb_decoded; |
| 65 | unsigned srate_pad; |
| 66 | unsigned pos_idx; |
| 67 | |
| 68 | AdaptiveModel *filt_size; |
| 69 | AdaptiveModel *filt_bits; |
| 70 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 71 | uint32_t *bprob[2]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 72 | |
| 73 | AdaptiveModel position; |
| 74 | AdaptiveModel fshift; |
| 75 | AdaptiveModel nb_segments; |
| 76 | AdaptiveModel coeff_bits[11]; |
| 77 | |
| 78 | Model64 mdl64[4][11]; |
| 79 | |
Paul B Mahol | cb35036 | 2023-02-15 12:54:11 | [diff] [blame] | 80 | int32_t buf0[131072+2560]; |
| 81 | int32_t buf1[131072+2560]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 82 | } ChContext; |
| 83 | |
| 84 | typedef struct RKAContext { |
| 85 | AVClass *class; |
| 86 | |
| 87 | ACoder ac; |
| 88 | ChContext ch[2]; |
| 89 | |
| 90 | int bps; |
| 91 | int align; |
| 92 | int channels; |
Paul B Mahol | 83a2007 | 2023-02-15 13:08:28 | [diff] [blame] | 93 | int correlated; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 94 | int frame_samples; |
| 95 | int last_nb_samples; |
| 96 | uint32_t total_nb_samples; |
| 97 | uint32_t samples_left; |
| 98 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 99 | uint32_t bprob[2][257]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 100 | |
| 101 | AdaptiveModel filt_size; |
| 102 | AdaptiveModel filt_bits; |
| 103 | } RKAContext; |
| 104 | |
| 105 | static int adaptive_model_init(AdaptiveModel *am, int buf_size) |
| 106 | { |
| 107 | am->buf_size = buf_size; |
| 108 | am->sum = 2000; |
| 109 | am->aprob0 = 0; |
| 110 | am->aprob1 = 0; |
| 111 | am->total = 0; |
| 112 | |
| 113 | if (!am->prob[0]) |
| 114 | am->prob[0] = av_malloc_array(buf_size + 5, sizeof(*am->prob[0])); |
| 115 | if (!am->prob[1]) |
| 116 | am->prob[1] = av_malloc_array(buf_size + 5, sizeof(*am->prob[1])); |
| 117 | |
| 118 | if (!am->prob[0] || !am->prob[1]) |
| 119 | return AVERROR(ENOMEM); |
| 120 | memset(am->prob[0], 0, (buf_size + 5) * sizeof(*am->prob[0])); |
| 121 | memset(am->prob[1], 0, (buf_size + 5) * sizeof(*am->prob[1])); |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static void adaptive_model_free(AdaptiveModel *am) |
| 126 | { |
| 127 | av_freep(&am->prob[0]); |
| 128 | av_freep(&am->prob[1]); |
| 129 | } |
| 130 | |
| 131 | static av_cold int rka_decode_init(AVCodecContext *avctx) |
| 132 | { |
| 133 | RKAContext *s = avctx->priv_data; |
| 134 | int cmode; |
| 135 | |
| 136 | if (avctx->extradata_size < 16) |
| 137 | return AVERROR_INVALIDDATA; |
| 138 | |
| 139 | s->bps = avctx->bits_per_raw_sample = avctx->extradata[13]; |
| 140 | |
| 141 | switch (s->bps) { |
| 142 | case 8: |
| 143 | avctx->sample_fmt = AV_SAMPLE_FMT_U8P; |
| 144 | break; |
| 145 | case 16: |
| 146 | avctx->sample_fmt = AV_SAMPLE_FMT_S16P; |
| 147 | break; |
| 148 | default: |
| 149 | return AVERROR_INVALIDDATA; |
| 150 | } |
| 151 | |
Paul B Mahol | 05b859a | 2023-02-15 13:11:16 | [diff] [blame] | 152 | av_channel_layout_uninit(&avctx->ch_layout); |
| 153 | s->channels = avctx->ch_layout.nb_channels = avctx->extradata[12]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 154 | if (s->channels < 1 || s->channels > 2) |
| 155 | return AVERROR_INVALIDDATA; |
| 156 | |
| 157 | s->align = (s->channels * (avctx->bits_per_raw_sample >> 3)); |
| 158 | s->samples_left = s->total_nb_samples = (AV_RL32(avctx->extradata + 4)) / s->align; |
| 159 | s->frame_samples = 131072 / s->align; |
| 160 | s->last_nb_samples = s->total_nb_samples % s->frame_samples; |
Paul B Mahol | 83a2007 | 2023-02-15 13:08:28 | [diff] [blame] | 161 | s->correlated = avctx->extradata[15] & 1; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 162 | |
| 163 | cmode = avctx->extradata[14] & 0xf; |
| 164 | if ((avctx->extradata[15] & 4) != 0) |
| 165 | cmode = -cmode; |
| 166 | |
Paul B Mahol | b5534b9 | 2023-02-14 08:46:46 | [diff] [blame] | 167 | s->ch[0].cmode = s->ch[1].cmode = cmode < 0 ? 2 : cmode; |
| 168 | s->ch[0].cmode2 = cmode < 0 ? FFABS(cmode) : 0; |
| 169 | s->ch[1].cmode2 = cmode < 0 ? FFABS(cmode) : 0; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 170 | av_log(avctx, AV_LOG_DEBUG, "cmode: %d\n", cmode); |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | static void model64_init(Model64 *m, unsigned bits) |
| 176 | { |
| 177 | unsigned x; |
| 178 | |
| 179 | m->bits = bits; |
| 180 | m->size = 64; |
| 181 | m->zero[0] = 1; |
| 182 | |
| 183 | x = (1 << (bits >> 1)) + 3; |
| 184 | x = FFMIN(x, 20); |
| 185 | |
| 186 | m->zero[1] = x; |
| 187 | m->sign[0] = 1; |
| 188 | m->sign[1] = 1; |
| 189 | |
| 190 | for (int i = 0; i < FF_ARRAY_ELEMS(m->val4); i++) { |
| 191 | m->val4[i] = 4; |
| 192 | m->val1[i] = 1; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | static int chctx_init(RKAContext *s, ChContext *c, |
| 197 | int sample_rate, int bps) |
| 198 | { |
| 199 | int ret; |
| 200 | |
| 201 | memset(c->buf0, 0, sizeof(c->buf0)); |
| 202 | memset(c->buf1, 0, sizeof(c->buf1)); |
| 203 | |
| 204 | c->filt_size = &s->filt_size; |
| 205 | c->filt_bits = &s->filt_bits; |
| 206 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 207 | c->bprob[0] = s->bprob[0]; |
| 208 | c->bprob[1] = s->bprob[1]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 209 | |
| 210 | c->srate_pad = (sample_rate << 13) / 44100 & 0xFFFFFFFCU; |
| 211 | c->pos_idx = 1; |
| 212 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 213 | for (int i = 0; i < FF_ARRAY_ELEMS(s->bprob[0]); i++) |
| 214 | c->bprob[0][i] = c->bprob[1][i] = 1; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 215 | |
| 216 | for (int i = 0; i < 11; i++) { |
| 217 | ret = adaptive_model_init(&c->coeff_bits[i], 32); |
| 218 | if (ret < 0) |
| 219 | return ret; |
| 220 | |
| 221 | model64_init(&c->mdl64[0][i], i); |
| 222 | model64_init(&c->mdl64[1][i], i); |
| 223 | model64_init(&c->mdl64[2][i], i+1); |
| 224 | model64_init(&c->mdl64[3][i], i+1); |
| 225 | } |
| 226 | |
| 227 | ret = adaptive_model_init(c->filt_size, 256); |
| 228 | if (ret < 0) |
| 229 | return ret; |
| 230 | ret = adaptive_model_init(c->filt_bits, 16); |
| 231 | if (ret < 0) |
| 232 | return ret; |
| 233 | ret = adaptive_model_init(&c->position, 16); |
| 234 | if (ret < 0) |
| 235 | return ret; |
| 236 | ret = adaptive_model_init(&c->nb_segments, 8); |
| 237 | if (ret < 0) |
| 238 | return ret; |
| 239 | return adaptive_model_init(&c->fshift, 32); |
| 240 | } |
| 241 | |
| 242 | static void init_acoder(ACoder *ac) |
| 243 | { |
| 244 | ac->low = 0x0; |
| 245 | ac->high = 0xffffffff; |
| 246 | ac->value = bytestream2_get_be32(&ac->gb); |
| 247 | } |
| 248 | |
| 249 | static int ac_decode_bool(ACoder *ac, int freq1, int freq2) |
| 250 | { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 251 | unsigned help, add, high, value; |
| 252 | int low; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 253 | |
| 254 | low = ac->low; |
| 255 | help = ac->high / (unsigned)(freq2 + freq1); |
| 256 | value = ac->value; |
| 257 | add = freq1 * help; |
| 258 | ac->high = help; |
| 259 | |
| 260 | if (value - low >= add) { |
| 261 | ac->low = low = add + low; |
| 262 | ac->high = high = freq2 * help; |
| 263 | while (1) { |
| 264 | if ((low ^ (high + low)) > 0xFFFFFF) { |
| 265 | if (high > 0xFFFF) |
| 266 | return 1; |
| 267 | ac->high = (uint16_t)-(int16_t)low; |
| 268 | } |
| 269 | |
| 270 | if (bytestream2_get_bytes_left(&ac->gb) <= 0) |
| 271 | break; |
| 272 | ac->value = bytestream2_get_byteu(&ac->gb) | (ac->value << 8); |
| 273 | ac->high = high = ac->high << 8; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 274 | low = ac->low = ac->low << 8; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 275 | } |
| 276 | return -1; |
| 277 | } |
| 278 | |
| 279 | ac->high = add; |
| 280 | while (1) { |
| 281 | if ((low ^ (add + low)) > 0xFFFFFF) { |
| 282 | if (add > 0xFFFF) |
| 283 | return 0; |
| 284 | ac->high = (uint16_t)-(int16_t)low; |
| 285 | } |
| 286 | |
| 287 | if (bytestream2_get_bytes_left(&ac->gb) <= 0) |
| 288 | break; |
| 289 | ac->value = bytestream2_get_byteu(&ac->gb) | (ac->value << 8); |
| 290 | ac->high = add = ac->high << 8; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 291 | low = ac->low = ac->low << 8; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 292 | } |
| 293 | return -1; |
| 294 | } |
| 295 | |
| 296 | static int decode_bool(ACoder *ac, ChContext *c, int idx) |
| 297 | { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 298 | uint32_t x; |
| 299 | int b; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 300 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 301 | x = c->bprob[0][idx]; |
| 302 | if (x + c->bprob[1][idx] > 4096) { |
| 303 | c->bprob[0][idx] = (x >> 1) + 1; |
| 304 | c->bprob[1][idx] = (c->bprob[1][idx] >> 1) + 1; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 305 | } |
| 306 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 307 | b = ac_decode_bool(ac, c->bprob[0][idx], c->bprob[1][idx]); |
| 308 | if (b < 0) |
| 309 | return b; |
| 310 | |
| 311 | c->bprob[b][idx]++; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 312 | |
| 313 | return b; |
| 314 | } |
| 315 | |
| 316 | static int ac_get_freq(ACoder *ac, unsigned freq, int *result) |
| 317 | { |
| 318 | uint32_t new_high; |
| 319 | |
| 320 | if (freq == 0) |
| 321 | return -1; |
| 322 | |
| 323 | new_high = ac->high / freq; |
| 324 | ac->high = new_high; |
| 325 | |
| 326 | if (new_high == 0) |
| 327 | return -1; |
| 328 | |
| 329 | *result = (ac->value - ac->low) / new_high; |
| 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | static int ac_update(ACoder *ac, int freq, int mul) |
| 335 | { |
| 336 | uint32_t low, high; |
| 337 | |
| 338 | low = ac->low = ac->high * freq + ac->low; |
| 339 | high = ac->high = ac->high * mul; |
| 340 | |
| 341 | while (1) { |
| 342 | if (((high + low) ^ low) > 0xffffff) { |
| 343 | if (high > 0xffff) |
| 344 | return 0; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 345 | ac->high = (uint16_t)-(int16_t)low; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | if (bytestream2_get_bytes_left(&ac->gb) <= 0) |
| 349 | break; |
| 350 | |
| 351 | ac->value = (ac->value << 8) | bytestream2_get_byteu(&ac->gb); |
| 352 | low = ac->low = ac->low << 8; |
| 353 | high = ac->high = ac->high << 8; |
| 354 | } |
| 355 | |
| 356 | return -1; |
| 357 | } |
| 358 | |
| 359 | static void amdl_update_prob(AdaptiveModel *am, int val, int diff) |
| 360 | { |
| 361 | am->aprob0 += diff; |
| 362 | if (val <= 0) { |
| 363 | am->prob[0][0] += diff; |
| 364 | } else { |
| 365 | do { |
| 366 | am->prob[0][val] += diff; |
| 367 | val += (val & -val); |
| 368 | } while (val < am->buf_size); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | static void update_ch_subobj(AdaptiveModel *am) |
| 373 | { |
| 374 | int idx2, idx = am->buf_size - 1; |
| 375 | |
| 376 | if (idx >= 0) { |
| 377 | do { |
| 378 | uint16_t *prob = am->prob[0]; |
| 379 | int diff, prob_idx = prob[idx]; |
| 380 | |
| 381 | idx2 = idx - 1; |
| 382 | if (idx > 0) { |
| 383 | int idx3 = idx - 1; |
| 384 | |
| 385 | if ((idx2 & idx) != idx2) { |
| 386 | do { |
| 387 | prob_idx -= prob[idx3]; |
| 388 | idx3 &= idx3 - 1; |
| 389 | } while ((idx2 & idx) != idx3); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | diff = ((prob_idx > 0) - prob_idx) >> 1; |
| 394 | amdl_update_prob(am, idx, diff); |
| 395 | idx--; |
| 396 | } while (idx2 >= 0); |
| 397 | } |
| 398 | |
| 399 | if (am->sum < 8000) |
| 400 | am->sum += 200; |
| 401 | |
| 402 | am->aprob1 = (am->aprob1 + 1) >> 1; |
| 403 | } |
| 404 | |
| 405 | static int amdl_decode_int(AdaptiveModel *am, ACoder *ac, unsigned *dst, unsigned size) |
| 406 | { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 407 | unsigned freq, size2, val, mul; |
| 408 | int j; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 409 | |
| 410 | size = FFMIN(size, am->buf_size - 1); |
| 411 | |
| 412 | if (am->aprob0 >= am->sum) |
| 413 | update_ch_subobj(am); |
| 414 | |
| 415 | if (am->aprob1 && (am->total == am->buf_size || |
| 416 | ac_decode_bool(ac, am->aprob0, am->aprob1) == 0)) { |
| 417 | if (am->total <= 1) { |
| 418 | dst[0] = am->last; |
| 419 | amdl_update_prob(am, dst[0], 1); |
| 420 | return 0; |
| 421 | } |
| 422 | if (size == am->buf_size - 1) { |
| 423 | freq = am->aprob0; |
| 424 | } else { |
| 425 | freq = am->prob[0][0]; |
| 426 | for (int j = size; j > 0; j &= (j - 1) ) |
| 427 | freq += am->prob[0][j]; |
| 428 | } |
| 429 | ac_get_freq(ac, freq, &freq); |
| 430 | size2 = am->buf_size >> 1; |
| 431 | val = am->prob[0][0]; |
| 432 | if (freq >= val) { |
| 433 | int sum = 0; |
| 434 | for (j = freq - val; size2; size2 >>= 1) { |
| 435 | unsigned v = am->prob[0][size2 + sum]; |
| 436 | if (j >= v) { |
| 437 | sum += size2; |
| 438 | j -= v; |
| 439 | } |
| 440 | } |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 441 | freq -= j; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 442 | val = sum + 1; |
| 443 | } else { |
| 444 | freq = 0; |
| 445 | val = 0; |
| 446 | } |
| 447 | dst[0] = val; |
| 448 | mul = am->prob[0][val]; |
| 449 | if (val > 0) { |
| 450 | for (int k = val - 1; (val & (val - 1)) != k; k &= k - 1) |
| 451 | mul -= am->prob[0][k]; |
| 452 | } |
| 453 | ac_update(ac, freq, mul); |
| 454 | amdl_update_prob(am, dst[0], 1); |
| 455 | return 0; |
| 456 | } |
| 457 | am->aprob1++; |
| 458 | if (size == am->buf_size - 1) { |
| 459 | ac_get_freq(ac, am->buf_size - am->total, &val); |
| 460 | } else { |
| 461 | freq = 1; |
| 462 | for (dst[0] = 0; dst[0] < size; dst[0]++) { |
| 463 | if (!am->prob[1][dst[0]]) |
| 464 | freq++; |
| 465 | } |
| 466 | ac_get_freq(ac, freq, &val); |
| 467 | } |
| 468 | freq = 0; |
| 469 | dst[0] = 0; |
| 470 | if (val > 0 && am->buf_size > 0) { |
| 471 | for (dst[0] = 0; dst[0] < size & freq < val; dst[0]++) { |
| 472 | if (!am->prob[1][dst[0]]) |
| 473 | freq++; |
| 474 | } |
| 475 | } |
| 476 | if (am->prob[1][dst[0]]) { |
| 477 | do { |
| 478 | val = dst[0]++; |
| 479 | } while (val + 1 < am->buf_size && am->prob[1][val + 1]); |
| 480 | } |
| 481 | ac_update(ac, freq, 1); |
| 482 | am->prob[1][dst[0]]++; |
| 483 | am->total++; |
| 484 | amdl_update_prob(am, dst[0], 1); |
| 485 | am->last = dst[0]; |
| 486 | |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | static int decode_filt_coeffs(RKAContext *s, ChContext *ctx, ACoder *ac, FiltCoeffs *dst) |
| 491 | { |
| 492 | unsigned val, bits; |
| 493 | int idx = 0; |
| 494 | |
| 495 | if (amdl_decode_int(ctx->filt_size, ac, &dst->size, 256) < 0) |
| 496 | return -1; |
| 497 | |
| 498 | if (dst->size == 0) |
| 499 | return 0; |
| 500 | |
| 501 | if (amdl_decode_int(ctx->filt_bits, ac, &bits, 10) < 0) |
| 502 | return -1; |
| 503 | |
| 504 | do { |
| 505 | if (((idx == 8) || (idx == 20)) && (0 < bits)) |
| 506 | bits--; |
| 507 | |
| 508 | if (bits > 10) |
| 509 | return -1; |
| 510 | |
| 511 | if (amdl_decode_int(&ctx->coeff_bits[bits], ac, &val, 31) < 0) |
| 512 | return -1; |
| 513 | |
| 514 | if (val == 31) { |
| 515 | ac_get_freq(ac, 65536, &val); |
| 516 | ac_update(ac, val, 1); |
| 517 | } |
| 518 | |
| 519 | if (val == 0) { |
| 520 | dst->coeffs[idx++] = 0; |
| 521 | } else { |
| 522 | unsigned freq = 0; |
| 523 | int sign; |
| 524 | |
| 525 | if (bits > 0) { |
| 526 | ac_get_freq(ac, 1 << bits, &freq); |
| 527 | ac_update(ac, freq, 1); |
| 528 | } |
| 529 | dst->coeffs[idx] = freq + 1 + ((val - 1U) << bits); |
| 530 | sign = decode_bool(ac, ctx, idx); |
| 531 | if (sign < 0) |
| 532 | return -1; |
| 533 | if (sign == 1) |
| 534 | dst->coeffs[idx] = -dst->coeffs[idx]; |
| 535 | idx++; |
| 536 | } |
| 537 | } while (idx < dst->size); |
| 538 | |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | static int ac_dec_bit(ACoder *ac) |
| 543 | { |
| 544 | uint32_t high, low; |
| 545 | |
| 546 | low = ac->low; |
| 547 | ac->high = high = ac->high >> 1; |
| 548 | if (ac->value - low < high) { |
| 549 | do { |
| 550 | if (((high + low) ^ low) > 0xffffff) { |
| 551 | if (high > 0xffff) |
| 552 | return 0; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 553 | ac->high = (uint16_t)-(int16_t)low; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | if (bytestream2_get_bytes_left(&ac->gb) <= 0) |
| 557 | break; |
| 558 | |
| 559 | ac->value = (ac->value << 8) | bytestream2_get_byteu(&ac->gb); |
| 560 | ac->high = high = ac->high << 8; |
| 561 | ac->low = low = ac->low << 8; |
| 562 | } while (1); |
| 563 | |
| 564 | return -1; |
| 565 | } |
| 566 | ac->low = low = low + high; |
| 567 | do { |
| 568 | if (((high + low) ^ low) > 0xffffff) { |
| 569 | if (high > 0xffff) |
| 570 | return 1; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 571 | ac->high = (uint16_t)-(int16_t)low; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | if (bytestream2_get_bytes_left(&ac->gb) <= 0) |
| 575 | break; |
| 576 | |
| 577 | ac->value = (ac->value << 8) | bytestream2_get_byteu(&ac->gb); |
| 578 | ac->high = high = ac->high << 8; |
| 579 | ac->low = low = ac->low << 8; |
| 580 | } while (1); |
| 581 | |
| 582 | return -1; |
| 583 | } |
| 584 | |
| 585 | static int mdl64_decode(ACoder *ac, Model64 *ctx, int *dst) |
| 586 | { |
| 587 | int sign, idx, bits; |
| 588 | unsigned val = 0; |
| 589 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 590 | if (ctx->zero[0] + ctx->zero[1] > 4000U) { |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 591 | ctx->zero[0] = (ctx->zero[0] >> 1) + 1; |
| 592 | ctx->zero[1] = (ctx->zero[1] >> 1) + 1; |
| 593 | } |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 594 | if (ctx->sign[0] + ctx->sign[1] > 4000U) { |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 595 | ctx->sign[0] = (ctx->sign[0] >> 1) + 1; |
| 596 | ctx->sign[1] = (ctx->sign[1] >> 1) + 1; |
| 597 | } |
| 598 | sign = ac_decode_bool(ac, ctx->zero[0], ctx->zero[1]); |
| 599 | if (sign == 0) { |
| 600 | ctx->zero[0] += 2; |
| 601 | dst[0] = 0; |
| 602 | return 0; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 603 | } else if (sign < 0) { |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 604 | return -1; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 605 | } |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 606 | |
| 607 | ctx->zero[1] += 2; |
| 608 | sign = ac_decode_bool(ac, ctx->sign[0], ctx->sign[1]); |
| 609 | if (sign < 0) |
| 610 | return -1; |
| 611 | ctx->sign[sign]++; |
| 612 | bits = ctx->bits; |
| 613 | if (bits > 0) { |
| 614 | if (bits < 13) { |
| 615 | ac_get_freq(ac, 1 << bits, &val); |
| 616 | ac_update(ac, val, 1); |
| 617 | } else { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 618 | int hbits = bits / 2; |
| 619 | ac_get_freq(ac, 1 << hbits, &val); |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 620 | ac_update(ac, val, 1); |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 621 | ac_get_freq(ac, 1 << (ctx->bits - (hbits)), &bits); |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 622 | ac_update(ac, val, 1); |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 623 | val += (bits << hbits); |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 624 | } |
| 625 | } |
| 626 | bits = ctx->size; |
| 627 | idx = 0; |
| 628 | if (bits >= 0) { |
| 629 | do { |
| 630 | uint16_t *val4 = ctx->val4; |
| 631 | int b; |
| 632 | |
| 633 | if (val4[idx] + ctx->val1[idx] > 2000U) { |
| 634 | val4[idx] = (val4[idx] >> 1) + 1; |
| 635 | ctx->val1[idx] = (ctx->val1[idx] >> 1) + 1; |
| 636 | } |
| 637 | b = ac_decode_bool(ac, ctx->val4[idx], ctx->val1[idx]); |
| 638 | if (b == 1) { |
| 639 | ctx->val1[idx] += 4; |
| 640 | break; |
| 641 | } else if (b < 0) { |
| 642 | return -1; |
| 643 | } |
| 644 | ctx->val4[idx] += 4; |
| 645 | idx++; |
| 646 | } while (idx <= ctx->size); |
| 647 | bits = ctx->size; |
| 648 | if (idx <= bits) { |
| 649 | dst[0] = val + 1 + (idx << ctx->bits); |
| 650 | if (sign) |
| 651 | dst[0] = -dst[0]; |
| 652 | return 0; |
| 653 | } |
| 654 | } |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 655 | bits++; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 656 | while (ac_dec_bit(ac) == 0) |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 657 | bits += 64; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 658 | ac_get_freq(ac, 64, &idx); |
| 659 | ac_update(ac, idx, 1); |
| 660 | idx += bits; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 661 | dst[0] = val + 1 + (idx << ctx->bits); |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 662 | if (sign) |
| 663 | dst[0] = -dst[0]; |
| 664 | |
| 665 | return 0; |
| 666 | } |
| 667 | |
Paul B Mahol | b5534b9 | 2023-02-14 08:46:46 | [diff] [blame] | 668 | static const uint8_t tab[16] = { |
| 669 | 0, 3, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 |
| 670 | }; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 671 | |
| 672 | static int decode_filter(RKAContext *s, ChContext *ctx, ACoder *ac, int off, unsigned size) |
| 673 | { |
| 674 | FiltCoeffs filt; |
| 675 | Model64 *mdl64; |
| 676 | int m = 0, split, val, last_val = 0, ret; |
| 677 | unsigned idx = 3, bits = 0; |
| 678 | |
| 679 | if (ctx->cmode == 0) { |
| 680 | if (amdl_decode_int(&ctx->fshift, ac, &bits, 15) < 0) |
| 681 | return -1; |
| 682 | bits &= 31U; |
| 683 | } |
| 684 | |
| 685 | ret = decode_filt_coeffs(s, ctx, ac, &filt); |
| 686 | if (ret < 0) |
| 687 | return ret; |
| 688 | |
| 689 | if (size < 512) |
| 690 | split = size / 2; |
| 691 | else |
| 692 | split = size >> 4; |
| 693 | |
Michael Niedermayer | 8874cfa | 2023-02-20 19:00:44 | [diff] [blame] | 694 | if (size <= 1) |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 695 | return 0; |
| 696 | |
| 697 | for (int x = 0; x < size;) { |
| 698 | if (amdl_decode_int(&ctx->position, ac, &idx, 10) < 0) |
| 699 | return -1; |
| 700 | |
| 701 | idx = (ctx->pos_idx + idx) % 11; |
| 702 | ctx->pos_idx = idx; |
| 703 | |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 704 | for (int y = 0; y < FFMIN(split, size - x); y++, off++) { |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 705 | int midx, shift = idx, *src, sum = 16; |
| 706 | |
Paul B Mahol | cb35036 | 2023-02-15 12:54:11 | [diff] [blame] | 707 | if (off >= FF_ARRAY_ELEMS(ctx->buf0)) |
| 708 | return -1; |
| 709 | |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 710 | midx = FFABS(last_val) >> shift; |
| 711 | if (midx >= 15) { |
| 712 | mdl64 = &ctx->mdl64[3][idx]; |
| 713 | } else if (midx >= 7) { |
| 714 | mdl64 = &ctx->mdl64[2][idx]; |
| 715 | } else if (midx >= 4) { |
| 716 | mdl64 = &ctx->mdl64[1][idx]; |
| 717 | } else { |
| 718 | mdl64 = &ctx->mdl64[0][idx]; |
| 719 | } |
| 720 | ret = mdl64_decode(ac, mdl64, &val); |
| 721 | if (ret < 0) |
| 722 | return -1; |
| 723 | last_val = val; |
| 724 | src = &ctx->buf1[off + -1]; |
| 725 | for (int i = 0; i < filt.size && i < 15; i++) |
Michael Niedermayer | d495747 | 2023-02-20 18:53:19 | [diff] [blame] | 726 | sum += filt.coeffs[i] * (unsigned)src[-i]; |
Michael Niedermayer | a02e45a | 2023-02-20 19:09:36 | [diff] [blame^] | 727 | sum = sum * 2U; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 728 | for (int i = 15; i < filt.size; i++) |
Michael Niedermayer | d495747 | 2023-02-20 18:53:19 | [diff] [blame] | 729 | sum += filt.coeffs[i] * (unsigned)src[-i]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 730 | sum = sum >> 6; |
| 731 | if (ctx->cmode == 0) { |
| 732 | if (bits == 0) { |
| 733 | ctx->buf1[off] = sum + val; |
| 734 | } else { |
Michael Niedermayer | d495747 | 2023-02-20 18:53:19 | [diff] [blame] | 735 | ctx->buf1[off] = (val + (sum >> bits)) * (1 << bits) + |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 736 | (((1U << bits) - 1U) & ctx->buf1[off + -1]); |
| 737 | } |
| 738 | ctx->buf0[off] = ctx->buf1[off] + ctx->buf0[off + -1]; |
| 739 | } else { |
Michael Niedermayer | a5d4e7e | 2023-02-20 19:04:18 | [diff] [blame] | 740 | val *= 1 << ctx->cmode; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 741 | sum += ctx->buf0[off + -1] + val; |
| 742 | switch (s->bps) { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 743 | case 16: sum = av_clip_int16(sum); break; |
| 744 | case 8: sum = av_clip_int8(sum); break; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 745 | } |
| 746 | ctx->buf1[off] = sum - ctx->buf0[off + -1]; |
| 747 | ctx->buf0[off] = sum; |
| 748 | m += FFABS(ctx->buf1[off]); |
| 749 | } |
| 750 | } |
| 751 | if (ctx->cmode2 != 0) { |
| 752 | int sum = 0; |
| 753 | for (int i = (m << 6) / split; i > 0; i = i >> 1) |
| 754 | sum++; |
| 755 | sum = sum - (ctx->cmode2 + 7); |
| 756 | ctx->cmode = FFMAX(sum, tab[ctx->cmode2]); |
| 757 | } |
| 758 | |
| 759 | x += split; |
| 760 | } |
| 761 | |
| 762 | return 0; |
| 763 | } |
| 764 | |
| 765 | static int decode_samples(AVCodecContext *avctx, ACoder *ac, ChContext *ctx, int offset) |
| 766 | { |
| 767 | RKAContext *s = avctx->priv_data; |
| 768 | int segment_size, offset2, mode, ret; |
| 769 | |
| 770 | ret = amdl_decode_int(&ctx->nb_segments, ac, &mode, 5); |
| 771 | if (ret < 0) |
| 772 | return ret; |
| 773 | |
| 774 | if (mode == 5) { |
| 775 | ret = ac_get_freq(ac, ctx->srate_pad >> 2, &segment_size); |
| 776 | if (ret < 0) |
| 777 | return ret; |
| 778 | ac_update(ac, segment_size, 1); |
| 779 | segment_size *= 4; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 780 | ret = decode_filter(s, ctx, ac, offset, segment_size); |
| 781 | if (ret < 0) |
| 782 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 783 | } else { |
| 784 | segment_size = ctx->srate_pad; |
| 785 | |
| 786 | if (mode) { |
| 787 | if (mode > 2) { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 788 | ret = decode_filter(s, ctx, ac, offset, segment_size / 4); |
| 789 | if (ret < 0) |
| 790 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 791 | offset2 = segment_size / 4 + offset; |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 792 | ret = decode_filter(s, ctx, ac, offset2, segment_size / 4); |
| 793 | if (ret < 0) |
| 794 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 795 | offset2 = segment_size / 4 + offset2; |
| 796 | } else { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 797 | ret = decode_filter(s, ctx, ac, offset, segment_size / 2); |
| 798 | if (ret < 0) |
| 799 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 800 | offset2 = segment_size / 2 + offset; |
| 801 | } |
| 802 | if (mode & 1) { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 803 | ret = decode_filter(s, ctx, ac, offset2, segment_size / 2); |
| 804 | if (ret < 0) |
| 805 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 806 | } else { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 807 | ret = decode_filter(s, ctx, ac, offset2, segment_size / 4); |
| 808 | if (ret < 0) |
| 809 | return ret; |
| 810 | ret = decode_filter(s, ctx, ac, segment_size / 4 + offset2, segment_size / 4); |
| 811 | if (ret < 0) |
| 812 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 813 | } |
| 814 | } else { |
Paul B Mahol | 7c41a08 | 2023-02-13 17:21:56 | [diff] [blame] | 815 | ret = decode_filter(s, ctx, ac, offset, ctx->srate_pad); |
| 816 | if (ret < 0) |
| 817 | return ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 818 | } |
| 819 | } |
| 820 | |
| 821 | return segment_size; |
| 822 | } |
| 823 | |
| 824 | static int decode_ch_samples(AVCodecContext *avctx, ChContext *c) |
| 825 | { |
| 826 | RKAContext *s = avctx->priv_data; |
| 827 | ACoder *ac = &s->ac; |
| 828 | int nb_decoded = 0; |
| 829 | |
| 830 | if (bytestream2_get_bytes_left(&ac->gb) <= 0) |
| 831 | return 0; |
| 832 | |
| 833 | memmove(c->buf0, &c->buf0[c->last_nb_decoded], 2560 * sizeof(*c->buf0)); |
| 834 | memmove(c->buf1, &c->buf1[c->last_nb_decoded], 2560 * sizeof(*c->buf1)); |
| 835 | |
| 836 | nb_decoded = decode_samples(avctx, ac, c, 2560); |
| 837 | if (nb_decoded < 0) |
| 838 | return nb_decoded; |
| 839 | c->last_nb_decoded = nb_decoded; |
| 840 | |
| 841 | return nb_decoded; |
| 842 | } |
| 843 | |
| 844 | static int rka_decode_frame(AVCodecContext *avctx, AVFrame *frame, |
| 845 | int *got_frame_ptr, AVPacket *avpkt) |
| 846 | { |
| 847 | RKAContext *s = avctx->priv_data; |
| 848 | ACoder *ac = &s->ac; |
| 849 | int ret; |
| 850 | |
| 851 | bytestream2_init(&ac->gb, avpkt->data, avpkt->size); |
| 852 | init_acoder(ac); |
| 853 | |
| 854 | for (int ch = 0; ch < s->channels; ch++) { |
| 855 | ret = chctx_init(s, &s->ch[ch], avctx->sample_rate, |
| 856 | avctx->bits_per_raw_sample); |
| 857 | if (ret < 0) |
| 858 | return ret; |
| 859 | } |
| 860 | |
| 861 | frame->nb_samples = s->frame_samples; |
| 862 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 863 | return ret; |
| 864 | |
Paul B Mahol | 83a2007 | 2023-02-15 13:08:28 | [diff] [blame] | 865 | if (s->channels == 2 && s->correlated) { |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 866 | int16_t *l16 = (int16_t *)frame->extended_data[0]; |
| 867 | int16_t *r16 = (int16_t *)frame->extended_data[1]; |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 868 | uint8_t *l8 = frame->extended_data[0]; |
| 869 | uint8_t *r8 = frame->extended_data[1]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 870 | |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 871 | for (int n = 0; n < frame->nb_samples;) { |
| 872 | ret = decode_ch_samples(avctx, &s->ch[0]); |
| 873 | if (ret == 0) { |
| 874 | frame->nb_samples = n; |
| 875 | break; |
| 876 | } |
| 877 | if (ret < 0 || n + ret > frame->nb_samples) |
| 878 | return AVERROR_INVALIDDATA; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 879 | |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 880 | ret = decode_ch_samples(avctx, &s->ch[1]); |
| 881 | if (ret == 0) { |
| 882 | frame->nb_samples = n; |
| 883 | break; |
| 884 | } |
| 885 | if (ret < 0 || n + ret > frame->nb_samples) |
| 886 | return AVERROR_INVALIDDATA; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 887 | |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 888 | switch (avctx->sample_fmt) { |
| 889 | case AV_SAMPLE_FMT_S16P: |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 890 | for (int i = 0; i < ret; i++) { |
| 891 | int l = s->ch[0].buf0[2560 + i]; |
| 892 | int r = s->ch[1].buf0[2560 + i]; |
| 893 | |
| 894 | l16[n + i] = (l * 2 + r + 1) >> 1; |
| 895 | r16[n + i] = (l * 2 - r + 1) >> 1; |
| 896 | } |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 897 | break; |
| 898 | case AV_SAMPLE_FMT_U8P: |
| 899 | for (int i = 0; i < ret; i++) { |
| 900 | int l = s->ch[0].buf0[2560 + i]; |
| 901 | int r = s->ch[1].buf0[2560 + i]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 902 | |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 903 | l8[n + i] = ((l * 2 + r + 1) >> 1) + 0x7f; |
| 904 | r8[n + i] = ((l * 2 - r + 1) >> 1) + 0x7f; |
| 905 | } |
| 906 | break; |
| 907 | default: |
| 908 | return AVERROR_INVALIDDATA; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 909 | } |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 910 | |
| 911 | n += ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 912 | } |
| 913 | } else { |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 914 | for (int n = 0; n < frame->nb_samples;) { |
Paul B Mahol | 83a2007 | 2023-02-15 13:08:28 | [diff] [blame] | 915 | for (int ch = 0; ch < s->channels; ch++) { |
| 916 | int16_t *m16 = (int16_t *)frame->data[ch]; |
| 917 | uint8_t *m8 = frame->data[ch]; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 918 | |
Paul B Mahol | 83a2007 | 2023-02-15 13:08:28 | [diff] [blame] | 919 | ret = decode_ch_samples(avctx, &s->ch[ch]); |
| 920 | if (ret == 0) { |
| 921 | frame->nb_samples = n; |
| 922 | break; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 923 | } |
| 924 | |
Paul B Mahol | 83a2007 | 2023-02-15 13:08:28 | [diff] [blame] | 925 | if (ret < 0 || n + ret > frame->nb_samples) |
| 926 | return AVERROR_INVALIDDATA; |
| 927 | |
| 928 | switch (avctx->sample_fmt) { |
| 929 | case AV_SAMPLE_FMT_S16P: |
| 930 | for (int i = 0; i < ret; i++) { |
| 931 | int m = s->ch[ch].buf0[2560 + i]; |
| 932 | |
| 933 | m16[n + i] = m; |
| 934 | } |
| 935 | break; |
| 936 | case AV_SAMPLE_FMT_U8P: |
| 937 | for (int i = 0; i < ret; i++) { |
| 938 | int m = s->ch[ch].buf0[2560 + i]; |
| 939 | |
| 940 | m8[n + i] = m + 0x7f; |
| 941 | } |
| 942 | break; |
| 943 | default: |
| 944 | return AVERROR_INVALIDDATA; |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 945 | } |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 946 | } |
Paul B Mahol | 052674f | 2023-02-13 20:03:13 | [diff] [blame] | 947 | |
| 948 | n += ret; |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 949 | } |
| 950 | } |
| 951 | |
| 952 | *got_frame_ptr = 1; |
| 953 | |
| 954 | return avpkt->size; |
| 955 | } |
| 956 | |
| 957 | static av_cold int rka_decode_close(AVCodecContext *avctx) |
| 958 | { |
| 959 | RKAContext *s = avctx->priv_data; |
| 960 | |
| 961 | for (int ch = 0; ch < 2; ch++) { |
| 962 | ChContext *c = &s->ch[ch]; |
| 963 | |
| 964 | for (int i = 0; i < 11; i++) |
| 965 | adaptive_model_free(&c->coeff_bits[i]); |
| 966 | |
| 967 | adaptive_model_free(&c->position); |
| 968 | adaptive_model_free(&c->nb_segments); |
| 969 | adaptive_model_free(&c->fshift); |
| 970 | } |
| 971 | |
| 972 | adaptive_model_free(&s->filt_size); |
| 973 | adaptive_model_free(&s->filt_bits); |
| 974 | |
| 975 | return 0; |
| 976 | } |
| 977 | |
| 978 | const FFCodec ff_rka_decoder = { |
| 979 | .p.name = "rka", |
Paul B Mahol | 5247dab | 2023-02-15 13:13:38 | [diff] [blame] | 980 | CODEC_LONG_NAME("RKA (RK Audio)"), |
Paul B Mahol | b8c0802 | 2023-01-31 20:03:38 | [diff] [blame] | 981 | .p.type = AVMEDIA_TYPE_AUDIO, |
| 982 | .p.id = AV_CODEC_ID_RKA, |
| 983 | .priv_data_size = sizeof(RKAContext), |
| 984 | .init = rka_decode_init, |
| 985 | .close = rka_decode_close, |
| 986 | FF_CODEC_DECODE_CB(rka_decode_frame), |
| 987 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, |
| 988 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
| 989 | }; |