| 1 | /* |
| 2 | * G.726 ADPCM audio codec |
| 3 | * Copyright (c) 2004 Roman Shaposhnik |
| 4 | * |
| 5 | * This is a very straightforward rendition of the G.726 |
| 6 | * Section 4 "Computational Details". |
| 7 | * |
| 8 | * This file is part of FFmpeg. |
| 9 | * |
| 10 | * FFmpeg is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU Lesser General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2.1 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * FFmpeg is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public |
| 21 | * License along with FFmpeg; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 23 | */ |
| 24 | #include <limits.h> |
| 25 | |
| 26 | #include "libavutil/avassert.h" |
| 27 | #include "libavutil/channel_layout.h" |
| 28 | #include "libavutil/opt.h" |
| 29 | #include "avcodec.h" |
| 30 | #include "internal.h" |
| 31 | #include "get_bits.h" |
| 32 | #include "put_bits.h" |
| 33 | |
| 34 | /** |
| 35 | * G.726 11bit float. |
| 36 | * G.726 Standard uses rather odd 11bit floating point arithmentic for |
| 37 | * numerous occasions. It's a mystery to me why they did it this way |
| 38 | * instead of simply using 32bit integer arithmetic. |
| 39 | */ |
| 40 | typedef struct Float11 { |
| 41 | uint8_t sign; /**< 1bit sign */ |
| 42 | uint8_t exp; /**< 4bit exponent */ |
| 43 | uint8_t mant; /**< 6bit mantissa */ |
| 44 | } Float11; |
| 45 | |
| 46 | static inline Float11* i2f(int i, Float11* f) |
| 47 | { |
| 48 | f->sign = (i < 0); |
| 49 | if (f->sign) |
| 50 | i = -i; |
| 51 | f->exp = av_log2_16bit(i) + !!i; |
| 52 | f->mant = i? (i<<6) >> f->exp : 1<<5; |
| 53 | return f; |
| 54 | } |
| 55 | |
| 56 | static inline int16_t mult(Float11* f1, Float11* f2) |
| 57 | { |
| 58 | int res, exp; |
| 59 | |
| 60 | exp = f1->exp + f2->exp; |
| 61 | res = (((f1->mant * f2->mant) + 0x30) >> 4); |
| 62 | res = exp > 19 ? res << (exp - 19) : res >> (19 - exp); |
| 63 | return (f1->sign ^ f2->sign) ? -res : res; |
| 64 | } |
| 65 | |
| 66 | static inline int sgn(int value) |
| 67 | { |
| 68 | return (value < 0) ? -1 : 1; |
| 69 | } |
| 70 | |
| 71 | typedef struct G726Tables { |
| 72 | const int* quant; /**< quantization table */ |
| 73 | const int16_t* iquant; /**< inverse quantization table */ |
| 74 | const int16_t* W; /**< special table #1 ;-) */ |
| 75 | const uint8_t* F; /**< special table #2 */ |
| 76 | } G726Tables; |
| 77 | |
| 78 | typedef struct G726Context { |
| 79 | AVClass *class; |
| 80 | G726Tables tbls; /**< static tables needed for computation */ |
| 81 | |
| 82 | Float11 sr[2]; /**< prev. reconstructed samples */ |
| 83 | Float11 dq[6]; /**< prev. difference */ |
| 84 | int a[2]; /**< second order predictor coeffs */ |
| 85 | int b[6]; /**< sixth order predictor coeffs */ |
| 86 | int pk[2]; /**< signs of prev. 2 sez + dq */ |
| 87 | |
| 88 | int ap; /**< scale factor control */ |
| 89 | int yu; /**< fast scale factor */ |
| 90 | int yl; /**< slow scale factor */ |
| 91 | int dms; /**< short average magnitude of F[i] */ |
| 92 | int dml; /**< long average magnitude of F[i] */ |
| 93 | int td; /**< tone detect */ |
| 94 | |
| 95 | int se; /**< estimated signal for the next iteration */ |
| 96 | int sez; /**< estimated second order prediction */ |
| 97 | int y; /**< quantizer scaling factor for the next iteration */ |
| 98 | int code_size; |
| 99 | int little_endian; /**< little-endian bitstream as used in aiff and Sun AU */ |
| 100 | } G726Context; |
| 101 | |
| 102 | static const int quant_tbl16[] = /**< 16kbit/s 2bits per sample */ |
| 103 | { 260, INT_MAX }; |
| 104 | static const int16_t iquant_tbl16[] = |
| 105 | { 116, 365, 365, 116 }; |
| 106 | static const int16_t W_tbl16[] = |
| 107 | { -22, 439, 439, -22 }; |
| 108 | static const uint8_t F_tbl16[] = |
| 109 | { 0, 7, 7, 0 }; |
| 110 | |
| 111 | static const int quant_tbl24[] = /**< 24kbit/s 3bits per sample */ |
| 112 | { 7, 217, 330, INT_MAX }; |
| 113 | static const int16_t iquant_tbl24[] = |
| 114 | { INT16_MIN, 135, 273, 373, 373, 273, 135, INT16_MIN }; |
| 115 | static const int16_t W_tbl24[] = |
| 116 | { -4, 30, 137, 582, 582, 137, 30, -4 }; |
| 117 | static const uint8_t F_tbl24[] = |
| 118 | { 0, 1, 2, 7, 7, 2, 1, 0 }; |
| 119 | |
| 120 | static const int quant_tbl32[] = /**< 32kbit/s 4bits per sample */ |
| 121 | { -125, 79, 177, 245, 299, 348, 399, INT_MAX }; |
| 122 | static const int16_t iquant_tbl32[] = |
| 123 | { INT16_MIN, 4, 135, 213, 273, 323, 373, 425, |
| 124 | 425, 373, 323, 273, 213, 135, 4, INT16_MIN }; |
| 125 | static const int16_t W_tbl32[] = |
| 126 | { -12, 18, 41, 64, 112, 198, 355, 1122, |
| 127 | 1122, 355, 198, 112, 64, 41, 18, -12}; |
| 128 | static const uint8_t F_tbl32[] = |
| 129 | { 0, 0, 0, 1, 1, 1, 3, 7, 7, 3, 1, 1, 1, 0, 0, 0 }; |
| 130 | |
| 131 | static const int quant_tbl40[] = /**< 40kbit/s 5bits per sample */ |
| 132 | { -122, -16, 67, 138, 197, 249, 297, 338, |
| 133 | 377, 412, 444, 474, 501, 527, 552, INT_MAX }; |
| 134 | static const int16_t iquant_tbl40[] = |
| 135 | { INT16_MIN, -66, 28, 104, 169, 224, 274, 318, |
| 136 | 358, 395, 429, 459, 488, 514, 539, 566, |
| 137 | 566, 539, 514, 488, 459, 429, 395, 358, |
| 138 | 318, 274, 224, 169, 104, 28, -66, INT16_MIN }; |
| 139 | static const int16_t W_tbl40[] = |
| 140 | { 14, 14, 24, 39, 40, 41, 58, 100, |
| 141 | 141, 179, 219, 280, 358, 440, 529, 696, |
| 142 | 696, 529, 440, 358, 280, 219, 179, 141, |
| 143 | 100, 58, 41, 40, 39, 24, 14, 14 }; |
| 144 | static const uint8_t F_tbl40[] = |
| 145 | { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 6, |
| 146 | 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; |
| 147 | |
| 148 | static const G726Tables G726Tables_pool[] = |
| 149 | {{ quant_tbl16, iquant_tbl16, W_tbl16, F_tbl16 }, |
| 150 | { quant_tbl24, iquant_tbl24, W_tbl24, F_tbl24 }, |
| 151 | { quant_tbl32, iquant_tbl32, W_tbl32, F_tbl32 }, |
| 152 | { quant_tbl40, iquant_tbl40, W_tbl40, F_tbl40 }}; |
| 153 | |
| 154 | |
| 155 | /** |
| 156 | * Para 4.2.2 page 18: Adaptive quantizer. |
| 157 | */ |
| 158 | static inline uint8_t quant(G726Context* c, int d) |
| 159 | { |
| 160 | int sign, exp, i, dln; |
| 161 | |
| 162 | sign = i = 0; |
| 163 | if (d < 0) { |
| 164 | sign = 1; |
| 165 | d = -d; |
| 166 | } |
| 167 | exp = av_log2_16bit(d); |
| 168 | dln = ((exp<<7) + (((d<<7)>>exp)&0x7f)) - (c->y>>2); |
| 169 | |
| 170 | while (c->tbls.quant[i] < INT_MAX && c->tbls.quant[i] < dln) |
| 171 | ++i; |
| 172 | |
| 173 | if (sign) |
| 174 | i = ~i; |
| 175 | if (c->code_size != 2 && i == 0) /* I'm not sure this is a good idea */ |
| 176 | i = 0xff; |
| 177 | |
| 178 | return i; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Para 4.2.3 page 22: Inverse adaptive quantizer. |
| 183 | */ |
| 184 | static inline int16_t inverse_quant(G726Context* c, int i) |
| 185 | { |
| 186 | int dql, dex, dqt; |
| 187 | |
| 188 | dql = c->tbls.iquant[i] + (c->y >> 2); |
| 189 | dex = (dql>>7) & 0xf; /* 4bit exponent */ |
| 190 | dqt = (1<<7) + (dql & 0x7f); /* log2 -> linear */ |
| 191 | return (dql < 0) ? 0 : ((dqt<<dex) >> 7); |
| 192 | } |
| 193 | |
| 194 | static int16_t g726_decode(G726Context* c, int I) |
| 195 | { |
| 196 | int dq, re_signal, pk0, fa1, i, tr, ylint, ylfrac, thr2, al, dq0; |
| 197 | Float11 f; |
| 198 | int I_sig= I >> (c->code_size - 1); |
| 199 | |
| 200 | dq = inverse_quant(c, I); |
| 201 | |
| 202 | /* Transition detect */ |
| 203 | ylint = (c->yl >> 15); |
| 204 | ylfrac = (c->yl >> 10) & 0x1f; |
| 205 | thr2 = (ylint > 9) ? 0x1f << 10 : (0x20 + ylfrac) << ylint; |
| 206 | tr= (c->td == 1 && dq > ((3*thr2)>>2)); |
| 207 | |
| 208 | if (I_sig) /* get the sign */ |
| 209 | dq = -dq; |
| 210 | re_signal = c->se + dq; |
| 211 | |
| 212 | /* Update second order predictor coefficient A2 and A1 */ |
| 213 | pk0 = (c->sez + dq) ? sgn(c->sez + dq) : 0; |
| 214 | dq0 = dq ? sgn(dq) : 0; |
| 215 | if (tr) { |
| 216 | c->a[0] = 0; |
| 217 | c->a[1] = 0; |
| 218 | for (i=0; i<6; i++) |
| 219 | c->b[i] = 0; |
| 220 | } else { |
| 221 | /* This is a bit crazy, but it really is +255 not +256 */ |
| 222 | fa1 = av_clip((-c->a[0]*c->pk[0]*pk0)>>5, -256, 255); |
| 223 | |
| 224 | c->a[1] += 128*pk0*c->pk[1] + fa1 - (c->a[1]>>7); |
| 225 | c->a[1] = av_clip(c->a[1], -12288, 12288); |
| 226 | c->a[0] += 64*3*pk0*c->pk[0] - (c->a[0] >> 8); |
| 227 | c->a[0] = av_clip(c->a[0], -(15360 - c->a[1]), 15360 - c->a[1]); |
| 228 | |
| 229 | for (i=0; i<6; i++) |
| 230 | c->b[i] += 128*dq0*sgn(-c->dq[i].sign) - (c->b[i]>>8); |
| 231 | } |
| 232 | |
| 233 | /* Update Dq and Sr and Pk */ |
| 234 | c->pk[1] = c->pk[0]; |
| 235 | c->pk[0] = pk0 ? pk0 : 1; |
| 236 | c->sr[1] = c->sr[0]; |
| 237 | i2f(re_signal, &c->sr[0]); |
| 238 | for (i=5; i>0; i--) |
| 239 | c->dq[i] = c->dq[i-1]; |
| 240 | i2f(dq, &c->dq[0]); |
| 241 | c->dq[0].sign = I_sig; /* Isn't it crazy ?!?! */ |
| 242 | |
| 243 | c->td = c->a[1] < -11776; |
| 244 | |
| 245 | /* Update Ap */ |
| 246 | c->dms += (c->tbls.F[I]<<4) + ((- c->dms) >> 5); |
| 247 | c->dml += (c->tbls.F[I]<<4) + ((- c->dml) >> 7); |
| 248 | if (tr) |
| 249 | c->ap = 256; |
| 250 | else { |
| 251 | c->ap += (-c->ap) >> 4; |
| 252 | if (c->y <= 1535 || c->td || abs((c->dms << 2) - c->dml) >= (c->dml >> 3)) |
| 253 | c->ap += 0x20; |
| 254 | } |
| 255 | |
| 256 | /* Update Yu and Yl */ |
| 257 | c->yu = av_clip(c->y + c->tbls.W[I] + ((-c->y)>>5), 544, 5120); |
| 258 | c->yl += c->yu + ((-c->yl)>>6); |
| 259 | |
| 260 | /* Next iteration for Y */ |
| 261 | al = (c->ap >= 256) ? 1<<6 : c->ap >> 2; |
| 262 | c->y = (c->yl + (c->yu - (c->yl>>6))*al) >> 6; |
| 263 | |
| 264 | /* Next iteration for SE and SEZ */ |
| 265 | c->se = 0; |
| 266 | for (i=0; i<6; i++) |
| 267 | c->se += mult(i2f(c->b[i] >> 2, &f), &c->dq[i]); |
| 268 | c->sez = c->se >> 1; |
| 269 | for (i=0; i<2; i++) |
| 270 | c->se += mult(i2f(c->a[i] >> 2, &f), &c->sr[i]); |
| 271 | c->se >>= 1; |
| 272 | |
| 273 | return av_clip(re_signal << 2, -0xffff, 0xffff); |
| 274 | } |
| 275 | |
| 276 | static av_cold int g726_reset(G726Context *c) |
| 277 | { |
| 278 | int i; |
| 279 | |
| 280 | c->tbls = G726Tables_pool[c->code_size - 2]; |
| 281 | for (i=0; i<2; i++) { |
| 282 | c->sr[i].mant = 1<<5; |
| 283 | c->pk[i] = 1; |
| 284 | } |
| 285 | for (i=0; i<6; i++) { |
| 286 | c->dq[i].mant = 1<<5; |
| 287 | } |
| 288 | c->yu = 544; |
| 289 | c->yl = 34816; |
| 290 | |
| 291 | c->y = 544; |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | #if CONFIG_ADPCM_G726_ENCODER |
| 297 | static int16_t g726_encode(G726Context* c, int16_t sig) |
| 298 | { |
| 299 | uint8_t i; |
| 300 | |
| 301 | i = quant(c, sig/4 - c->se) & ((1<<c->code_size) - 1); |
| 302 | g726_decode(c, i); |
| 303 | return i; |
| 304 | } |
| 305 | |
| 306 | /* Interfacing to the libavcodec */ |
| 307 | |
| 308 | static av_cold int g726_encode_init(AVCodecContext *avctx) |
| 309 | { |
| 310 | G726Context* c = avctx->priv_data; |
| 311 | |
| 312 | if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && |
| 313 | avctx->sample_rate != 8000) { |
| 314 | av_log(avctx, AV_LOG_ERROR, "Sample rates other than 8kHz are not " |
| 315 | "allowed when the compliance level is higher than unofficial. " |
| 316 | "Resample or reduce the compliance level.\n"); |
| 317 | return AVERROR(EINVAL); |
| 318 | } |
| 319 | av_assert0(avctx->sample_rate > 0); |
| 320 | |
| 321 | if(avctx->channels != 1){ |
| 322 | av_log(avctx, AV_LOG_ERROR, "Only mono is supported\n"); |
| 323 | return AVERROR(EINVAL); |
| 324 | } |
| 325 | |
| 326 | if (avctx->bit_rate) |
| 327 | c->code_size = (avctx->bit_rate + avctx->sample_rate/2) / avctx->sample_rate; |
| 328 | |
| 329 | c->code_size = av_clip(c->code_size, 2, 5); |
| 330 | avctx->bit_rate = c->code_size * avctx->sample_rate; |
| 331 | avctx->bits_per_coded_sample = c->code_size; |
| 332 | |
| 333 | g726_reset(c); |
| 334 | |
| 335 | /* select a frame size that will end on a byte boundary and have a size of |
| 336 | approximately 1024 bytes */ |
| 337 | avctx->frame_size = ((int[]){ 4096, 2736, 2048, 1640 })[c->code_size - 2]; |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | static int g726_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, |
| 343 | const AVFrame *frame, int *got_packet_ptr) |
| 344 | { |
| 345 | G726Context *c = avctx->priv_data; |
| 346 | const int16_t *samples = (const int16_t *)frame->data[0]; |
| 347 | PutBitContext pb; |
| 348 | int i, ret, out_size; |
| 349 | |
| 350 | out_size = (frame->nb_samples * c->code_size + 7) / 8; |
| 351 | if ((ret = ff_alloc_packet2(avctx, avpkt, out_size)) < 0) |
| 352 | return ret; |
| 353 | init_put_bits(&pb, avpkt->data, avpkt->size); |
| 354 | |
| 355 | for (i = 0; i < frame->nb_samples; i++) |
| 356 | put_bits(&pb, c->code_size, g726_encode(c, *samples++)); |
| 357 | |
| 358 | flush_put_bits(&pb); |
| 359 | |
| 360 | avpkt->size = out_size; |
| 361 | *got_packet_ptr = 1; |
| 362 | return 0; |
| 363 | } |
| 364 | |
| 365 | #define OFFSET(x) offsetof(G726Context, x) |
| 366 | #define AE AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| 367 | static const AVOption options[] = { |
| 368 | { "code_size", "Bits per code", OFFSET(code_size), AV_OPT_TYPE_INT, { .i64 = 4 }, 2, 5, AE }, |
| 369 | { NULL }, |
| 370 | }; |
| 371 | |
| 372 | static const AVClass g726_class = { |
| 373 | .class_name = "g726", |
| 374 | .item_name = av_default_item_name, |
| 375 | .option = options, |
| 376 | .version = LIBAVUTIL_VERSION_INT, |
| 377 | }; |
| 378 | |
| 379 | static const AVCodecDefault defaults[] = { |
| 380 | { "b", "0" }, |
| 381 | { NULL }, |
| 382 | }; |
| 383 | |
| 384 | AVCodec ff_adpcm_g726_encoder = { |
| 385 | .name = "g726", |
| 386 | .long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM"), |
| 387 | .type = AVMEDIA_TYPE_AUDIO, |
| 388 | .id = AV_CODEC_ID_ADPCM_G726, |
| 389 | .priv_data_size = sizeof(G726Context), |
| 390 | .init = g726_encode_init, |
| 391 | .encode2 = g726_encode_frame, |
| 392 | .capabilities = CODEC_CAP_SMALL_LAST_FRAME, |
| 393 | .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16, |
| 394 | AV_SAMPLE_FMT_NONE }, |
| 395 | .priv_class = &g726_class, |
| 396 | .defaults = defaults, |
| 397 | }; |
| 398 | #endif |
| 399 | |
| 400 | #if CONFIG_ADPCM_G726_DECODER || CONFIG_ADPCM_G726LE_DECODER |
| 401 | static av_cold int g726_decode_init(AVCodecContext *avctx) |
| 402 | { |
| 403 | G726Context* c = avctx->priv_data; |
| 404 | |
| 405 | if(avctx->channels > 1){ |
| 406 | avpriv_request_sample(avctx, "Decoding more than one channel"); |
| 407 | return AVERROR_PATCHWELCOME; |
| 408 | } |
| 409 | avctx->channels = 1; |
| 410 | avctx->channel_layout = AV_CH_LAYOUT_MONO; |
| 411 | |
| 412 | c->little_endian = !strcmp(avctx->codec->name, "g726le"); |
| 413 | |
| 414 | c->code_size = avctx->bits_per_coded_sample; |
| 415 | if (c->code_size < 2 || c->code_size > 5) { |
| 416 | av_log(avctx, AV_LOG_ERROR, "Invalid number of bits %d\n", c->code_size); |
| 417 | return AVERROR(EINVAL); |
| 418 | } |
| 419 | g726_reset(c); |
| 420 | |
| 421 | avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int g726_decode_frame(AVCodecContext *avctx, void *data, |
| 427 | int *got_frame_ptr, AVPacket *avpkt) |
| 428 | { |
| 429 | AVFrame *frame = data; |
| 430 | const uint8_t *buf = avpkt->data; |
| 431 | int buf_size = avpkt->size; |
| 432 | G726Context *c = avctx->priv_data; |
| 433 | int16_t *samples; |
| 434 | GetBitContext gb; |
| 435 | int out_samples, ret; |
| 436 | |
| 437 | out_samples = buf_size * 8 / c->code_size; |
| 438 | |
| 439 | /* get output buffer */ |
| 440 | frame->nb_samples = out_samples; |
| 441 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 442 | return ret; |
| 443 | samples = (int16_t *)frame->data[0]; |
| 444 | |
| 445 | init_get_bits(&gb, buf, buf_size * 8); |
| 446 | |
| 447 | while (out_samples--) |
| 448 | *samples++ = g726_decode(c, c->little_endian ? |
| 449 | get_bits_le(&gb, c->code_size) : |
| 450 | get_bits(&gb, c->code_size)); |
| 451 | |
| 452 | if (get_bits_left(&gb) > 0) |
| 453 | av_log(avctx, AV_LOG_ERROR, "Frame invalidly split, missing parser?\n"); |
| 454 | |
| 455 | *got_frame_ptr = 1; |
| 456 | |
| 457 | return buf_size; |
| 458 | } |
| 459 | |
| 460 | static void g726_decode_flush(AVCodecContext *avctx) |
| 461 | { |
| 462 | G726Context *c = avctx->priv_data; |
| 463 | g726_reset(c); |
| 464 | } |
| 465 | #endif |
| 466 | |
| 467 | #if CONFIG_ADPCM_G726_DECODER |
| 468 | AVCodec ff_adpcm_g726_decoder = { |
| 469 | .name = "g726", |
| 470 | .long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM"), |
| 471 | .type = AVMEDIA_TYPE_AUDIO, |
| 472 | .id = AV_CODEC_ID_ADPCM_G726, |
| 473 | .priv_data_size = sizeof(G726Context), |
| 474 | .init = g726_decode_init, |
| 475 | .decode = g726_decode_frame, |
| 476 | .flush = g726_decode_flush, |
| 477 | .capabilities = CODEC_CAP_DR1, |
| 478 | }; |
| 479 | #endif |
| 480 | |
| 481 | #if CONFIG_ADPCM_G726LE_DECODER |
| 482 | AVCodec ff_adpcm_g726le_decoder = { |
| 483 | .name = "g726le", |
| 484 | .type = AVMEDIA_TYPE_AUDIO, |
| 485 | .id = AV_CODEC_ID_ADPCM_G726LE, |
| 486 | .priv_data_size = sizeof(G726Context), |
| 487 | .init = g726_decode_init, |
| 488 | .decode = g726_decode_frame, |
| 489 | .flush = g726_decode_flush, |
| 490 | .capabilities = CODEC_CAP_DR1, |
| 491 | .long_name = NULL_IF_CONFIG_SMALL("G.726 ADPCM little-endian"), |
| 492 | }; |
| 493 | #endif |