| 1 | /* |
| 2 | * AMR Audio decoder stub |
| 3 | * Copyright (c) 2003 The FFmpeg Project |
| 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/avstring.h" |
| 23 | #include "libavutil/channel_layout.h" |
| 24 | #include "libavutil/common.h" |
| 25 | #include "libavutil/opt.h" |
| 26 | #include "avcodec.h" |
| 27 | #include "audio_frame_queue.h" |
| 28 | #include "internal.h" |
| 29 | |
| 30 | static int amr_decode_fix_avctx(AVCodecContext *avctx) |
| 31 | { |
| 32 | const int is_amr_wb = 1 + (avctx->codec_id == AV_CODEC_ID_AMR_WB); |
| 33 | |
| 34 | if (!avctx->sample_rate) |
| 35 | avctx->sample_rate = 8000 * is_amr_wb; |
| 36 | |
| 37 | if (avctx->channels > 1) { |
| 38 | avpriv_report_missing_feature(avctx, "multi-channel AMR"); |
| 39 | return AVERROR_PATCHWELCOME; |
| 40 | } |
| 41 | |
| 42 | avctx->channels = 1; |
| 43 | avctx->channel_layout = AV_CH_LAYOUT_MONO; |
| 44 | avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | #if CONFIG_LIBOPENCORE_AMRNB |
| 49 | |
| 50 | #include <opencore-amrnb/interf_dec.h> |
| 51 | #include <opencore-amrnb/interf_enc.h> |
| 52 | |
| 53 | typedef struct AMRContext { |
| 54 | AVClass *av_class; |
| 55 | void *dec_state; |
| 56 | void *enc_state; |
| 57 | int enc_bitrate; |
| 58 | int enc_mode; |
| 59 | int enc_dtx; |
| 60 | int enc_last_frame; |
| 61 | AudioFrameQueue afq; |
| 62 | } AMRContext; |
| 63 | |
| 64 | #if CONFIG_LIBOPENCORE_AMRNB_DECODER |
| 65 | static av_cold int amr_nb_decode_init(AVCodecContext *avctx) |
| 66 | { |
| 67 | AMRContext *s = avctx->priv_data; |
| 68 | int ret; |
| 69 | |
| 70 | if ((ret = amr_decode_fix_avctx(avctx)) < 0) |
| 71 | return ret; |
| 72 | |
| 73 | s->dec_state = Decoder_Interface_init(); |
| 74 | if (!s->dec_state) { |
| 75 | av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n"); |
| 76 | return -1; |
| 77 | } |
| 78 | |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static av_cold int amr_nb_decode_close(AVCodecContext *avctx) |
| 83 | { |
| 84 | AMRContext *s = avctx->priv_data; |
| 85 | |
| 86 | Decoder_Interface_exit(s->dec_state); |
| 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | static int amr_nb_decode_frame(AVCodecContext *avctx, void *data, |
| 92 | int *got_frame_ptr, AVPacket *avpkt) |
| 93 | { |
| 94 | AVFrame *frame = data; |
| 95 | const uint8_t *buf = avpkt->data; |
| 96 | int buf_size = avpkt->size; |
| 97 | AMRContext *s = avctx->priv_data; |
| 98 | static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 }; |
| 99 | enum Mode dec_mode; |
| 100 | int packet_size, ret; |
| 101 | |
| 102 | av_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n", |
| 103 | buf, buf_size, avctx->frame_number); |
| 104 | |
| 105 | /* get output buffer */ |
| 106 | frame->nb_samples = 160; |
| 107 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 108 | return ret; |
| 109 | |
| 110 | dec_mode = (buf[0] >> 3) & 0x000F; |
| 111 | packet_size = block_size[dec_mode] + 1; |
| 112 | |
| 113 | if (packet_size > buf_size) { |
| 114 | av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", |
| 115 | buf_size, packet_size); |
| 116 | return AVERROR_INVALIDDATA; |
| 117 | } |
| 118 | |
| 119 | av_dlog(avctx, "packet_size=%d buf= 0x%X %X %X %X\n", |
| 120 | packet_size, buf[0], buf[1], buf[2], buf[3]); |
| 121 | /* call decoder */ |
| 122 | Decoder_Interface_Decode(s->dec_state, buf, (short *)frame->data[0], 0); |
| 123 | |
| 124 | *got_frame_ptr = 1; |
| 125 | |
| 126 | return packet_size; |
| 127 | } |
| 128 | |
| 129 | AVCodec ff_libopencore_amrnb_decoder = { |
| 130 | .name = "libopencore_amrnb", |
| 131 | .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"), |
| 132 | .type = AVMEDIA_TYPE_AUDIO, |
| 133 | .id = AV_CODEC_ID_AMR_NB, |
| 134 | .priv_data_size = sizeof(AMRContext), |
| 135 | .init = amr_nb_decode_init, |
| 136 | .close = amr_nb_decode_close, |
| 137 | .decode = amr_nb_decode_frame, |
| 138 | .capabilities = CODEC_CAP_DR1, |
| 139 | }; |
| 140 | #endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */ |
| 141 | |
| 142 | #if CONFIG_LIBOPENCORE_AMRNB_ENCODER |
| 143 | /* Common code for fixed and float version*/ |
| 144 | typedef struct AMR_bitrates { |
| 145 | int rate; |
| 146 | enum Mode mode; |
| 147 | } AMR_bitrates; |
| 148 | |
| 149 | /* Match desired bitrate */ |
| 150 | static int get_bitrate_mode(int bitrate, void *log_ctx) |
| 151 | { |
| 152 | /* make the correspondance between bitrate and mode */ |
| 153 | static const AMR_bitrates rates[] = { |
| 154 | { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 }, |
| 155 | { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 } |
| 156 | }; |
| 157 | int i, best = -1, min_diff = 0; |
| 158 | char log_buf[200]; |
| 159 | |
| 160 | for (i = 0; i < 8; i++) { |
| 161 | if (rates[i].rate == bitrate) |
| 162 | return rates[i].mode; |
| 163 | if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) { |
| 164 | best = i; |
| 165 | min_diff = abs(rates[i].rate - bitrate); |
| 166 | } |
| 167 | } |
| 168 | /* no bitrate matching exactly, log a warning */ |
| 169 | snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of "); |
| 170 | for (i = 0; i < 8; i++) |
| 171 | av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f); |
| 172 | av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f); |
| 173 | av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf); |
| 174 | |
| 175 | return best; |
| 176 | } |
| 177 | |
| 178 | static const AVOption options[] = { |
| 179 | { "dtx", "Allow DTX (generate comfort noise)", offsetof(AMRContext, enc_dtx), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM }, |
| 180 | { NULL } |
| 181 | }; |
| 182 | |
| 183 | static const AVClass amrnb_class = { |
| 184 | "libopencore_amrnb", av_default_item_name, options, LIBAVUTIL_VERSION_INT |
| 185 | }; |
| 186 | |
| 187 | static av_cold int amr_nb_encode_init(AVCodecContext *avctx) |
| 188 | { |
| 189 | AMRContext *s = avctx->priv_data; |
| 190 | |
| 191 | if (avctx->sample_rate != 8000 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) { |
| 192 | av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n"); |
| 193 | return AVERROR(ENOSYS); |
| 194 | } |
| 195 | |
| 196 | if (avctx->channels != 1) { |
| 197 | av_log(avctx, AV_LOG_ERROR, "Only mono supported\n"); |
| 198 | return AVERROR(ENOSYS); |
| 199 | } |
| 200 | |
| 201 | avctx->frame_size = 160; |
| 202 | avctx->delay = 50; |
| 203 | ff_af_queue_init(avctx, &s->afq); |
| 204 | |
| 205 | s->enc_state = Encoder_Interface_init(s->enc_dtx); |
| 206 | if (!s->enc_state) { |
| 207 | av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n"); |
| 208 | return -1; |
| 209 | } |
| 210 | |
| 211 | s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx); |
| 212 | s->enc_bitrate = avctx->bit_rate; |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | static av_cold int amr_nb_encode_close(AVCodecContext *avctx) |
| 218 | { |
| 219 | AMRContext *s = avctx->priv_data; |
| 220 | |
| 221 | Encoder_Interface_exit(s->enc_state); |
| 222 | ff_af_queue_close(&s->afq); |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, |
| 227 | const AVFrame *frame, int *got_packet_ptr) |
| 228 | { |
| 229 | AMRContext *s = avctx->priv_data; |
| 230 | int written, ret; |
| 231 | int16_t *flush_buf = NULL; |
| 232 | const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL; |
| 233 | |
| 234 | if (s->enc_bitrate != avctx->bit_rate) { |
| 235 | s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx); |
| 236 | s->enc_bitrate = avctx->bit_rate; |
| 237 | } |
| 238 | |
| 239 | if ((ret = ff_alloc_packet2(avctx, avpkt, 32)) < 0) |
| 240 | return ret; |
| 241 | |
| 242 | if (frame) { |
| 243 | if (frame->nb_samples < avctx->frame_size) { |
| 244 | flush_buf = av_mallocz_array(avctx->frame_size, sizeof(*flush_buf)); |
| 245 | if (!flush_buf) |
| 246 | return AVERROR(ENOMEM); |
| 247 | memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf)); |
| 248 | samples = flush_buf; |
| 249 | if (frame->nb_samples < avctx->frame_size - avctx->delay) |
| 250 | s->enc_last_frame = -1; |
| 251 | } |
| 252 | if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) { |
| 253 | av_freep(&flush_buf); |
| 254 | return ret; |
| 255 | } |
| 256 | } else { |
| 257 | if (s->enc_last_frame < 0) |
| 258 | return 0; |
| 259 | flush_buf = av_mallocz_array(avctx->frame_size, sizeof(*flush_buf)); |
| 260 | if (!flush_buf) |
| 261 | return AVERROR(ENOMEM); |
| 262 | samples = flush_buf; |
| 263 | s->enc_last_frame = -1; |
| 264 | } |
| 265 | |
| 266 | written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples, |
| 267 | avpkt->data, 0); |
| 268 | av_dlog(avctx, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n", |
| 269 | written, s->enc_mode, avpkt->data[0]); |
| 270 | |
| 271 | /* Get the next frame pts/duration */ |
| 272 | ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts, |
| 273 | &avpkt->duration); |
| 274 | |
| 275 | avpkt->size = written; |
| 276 | *got_packet_ptr = 1; |
| 277 | av_freep(&flush_buf); |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | AVCodec ff_libopencore_amrnb_encoder = { |
| 282 | .name = "libopencore_amrnb", |
| 283 | .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"), |
| 284 | .type = AVMEDIA_TYPE_AUDIO, |
| 285 | .id = AV_CODEC_ID_AMR_NB, |
| 286 | .priv_data_size = sizeof(AMRContext), |
| 287 | .init = amr_nb_encode_init, |
| 288 | .encode2 = amr_nb_encode_frame, |
| 289 | .close = amr_nb_encode_close, |
| 290 | .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME, |
| 291 | .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16, |
| 292 | AV_SAMPLE_FMT_NONE }, |
| 293 | .priv_class = &amrnb_class, |
| 294 | }; |
| 295 | #endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */ |
| 296 | |
| 297 | #endif /* CONFIG_LIBOPENCORE_AMRNB */ |
| 298 | |
| 299 | /* -----------AMR wideband ------------*/ |
| 300 | #if CONFIG_LIBOPENCORE_AMRWB_DECODER |
| 301 | |
| 302 | #include <opencore-amrwb/dec_if.h> |
| 303 | #include <opencore-amrwb/if_rom.h> |
| 304 | |
| 305 | typedef struct AMRWBContext { |
| 306 | void *state; |
| 307 | } AMRWBContext; |
| 308 | |
| 309 | static av_cold int amr_wb_decode_init(AVCodecContext *avctx) |
| 310 | { |
| 311 | AMRWBContext *s = avctx->priv_data; |
| 312 | int ret; |
| 313 | |
| 314 | if ((ret = amr_decode_fix_avctx(avctx)) < 0) |
| 315 | return ret; |
| 316 | |
| 317 | s->state = D_IF_init(); |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static int amr_wb_decode_frame(AVCodecContext *avctx, void *data, |
| 323 | int *got_frame_ptr, AVPacket *avpkt) |
| 324 | { |
| 325 | AVFrame *frame = data; |
| 326 | const uint8_t *buf = avpkt->data; |
| 327 | int buf_size = avpkt->size; |
| 328 | AMRWBContext *s = avctx->priv_data; |
| 329 | int mode, ret; |
| 330 | int packet_size; |
| 331 | static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1}; |
| 332 | |
| 333 | /* get output buffer */ |
| 334 | frame->nb_samples = 320; |
| 335 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 336 | return ret; |
| 337 | |
| 338 | mode = (buf[0] >> 3) & 0x000F; |
| 339 | packet_size = block_size[mode]; |
| 340 | |
| 341 | if (packet_size > buf_size) { |
| 342 | av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", |
| 343 | buf_size, packet_size + 1); |
| 344 | return AVERROR_INVALIDDATA; |
| 345 | } |
| 346 | if (!packet_size) { |
| 347 | av_log(avctx, AV_LOG_ERROR, "amr packet_size invalid\n"); |
| 348 | return AVERROR_INVALIDDATA; |
| 349 | } |
| 350 | |
| 351 | D_IF_decode(s->state, buf, (short *)frame->data[0], _good_frame); |
| 352 | |
| 353 | *got_frame_ptr = 1; |
| 354 | |
| 355 | return packet_size; |
| 356 | } |
| 357 | |
| 358 | static int amr_wb_decode_close(AVCodecContext *avctx) |
| 359 | { |
| 360 | AMRWBContext *s = avctx->priv_data; |
| 361 | |
| 362 | D_IF_exit(s->state); |
| 363 | return 0; |
| 364 | } |
| 365 | |
| 366 | AVCodec ff_libopencore_amrwb_decoder = { |
| 367 | .name = "libopencore_amrwb", |
| 368 | .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"), |
| 369 | .type = AVMEDIA_TYPE_AUDIO, |
| 370 | .id = AV_CODEC_ID_AMR_WB, |
| 371 | .priv_data_size = sizeof(AMRWBContext), |
| 372 | .init = amr_wb_decode_init, |
| 373 | .close = amr_wb_decode_close, |
| 374 | .decode = amr_wb_decode_frame, |
| 375 | .capabilities = CODEC_CAP_DR1, |
| 376 | }; |
| 377 | |
| 378 | #endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */ |