1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "webrtc/modules/audio_coding/main/acm2/acm_amrwb.h" 12 13 #ifdef WEBRTC_CODEC_AMRWB 14 // NOTE! GSM AMR-wb is not included in the open-source package. The 15 // following interface file is needed: 16 #include "webrtc/modules/audio_coding/main/codecs/amrwb/interface/amrwb_interface.h" 17 #include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h" 18 #include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h" 19 #include "webrtc/system_wrappers/interface/rw_lock_wrapper.h" 20 #include "webrtc/system_wrappers/interface/trace.h" 21 22 // The API in the header file should match the one below. 23 // 24 // int16_t WebRtcAmrWb_CreateEnc(AMRWB_encinst_t_** enc_inst); 25 // int16_t WebRtcAmrWb_CreateDec(AMRWB_decinst_t_** dec_inst); 26 // int16_t WebRtcAmrWb_FreeEnc(AMRWB_encinst_t_* enc_inst); 27 // int16_t WebRtcAmrWb_FreeDec(AMRWB_decinst_t_* dec_inst); 28 // int16_t WebRtcAmrWb_Encode(AMRWB_encinst_t_* enc_inst, int16_t* input, 29 // int16_t len, int16_t* output, int16_t mode); 30 // int16_t WebRtcAmrWb_EncoderInit(AMRWB_encinst_t_* enc_inst, 31 // int16_t dtx_mode); 32 // int16_t WebRtcAmrWb_EncodeBitmode(AMRWB_encinst_t_* enc_inst, 33 // int format); 34 // int16_t WebRtcAmrWb_Decode(AMRWB_decinst_t_* dec_inst); 35 // int16_t WebRtcAmrWb_DecodePlc(AMRWB_decinst_t_* dec_inst); 36 // int16_t WebRtcAmrWb_DecoderInit(AMRWB_decinst_t_* dec_inst); 37 // int16_t WebRtcAmrWb_DecodeBitmode(AMRWB_decinst_t_* dec_inst, 38 // int format); 39 #endif 40 41 namespace webrtc { 42 43 namespace acm2 { 44 45 #ifndef WEBRTC_CODEC_AMRWB 46 ACMAMRwb::ACMAMRwb(int16_t /* codec_id */) 47 : encoder_inst_ptr_(NULL), 48 encoding_mode_(-1), // invalid value 49 encoding_rate_(0), // invalid value 50 encoder_packing_format_(AMRBandwidthEfficient) {} 51 52 ACMAMRwb::~ACMAMRwb() {} 53 54 int16_t ACMAMRwb::InternalEncode(uint8_t* /* bitstream */, 55 int16_t* /* bitstream_len_byte */) { 56 return -1; 57 } 58 59 int16_t ACMAMRwb::EnableDTX() { return -1; } 60 61 int16_t ACMAMRwb::DisableDTX() { return -1; } 62 63 int16_t ACMAMRwb::InternalInitEncoder( 64 WebRtcACMCodecParams* /* codec_params */) { 65 return -1; 66 } 67 68 ACMGenericCodec* ACMAMRwb::CreateInstance(void) { return NULL; } 69 70 int16_t ACMAMRwb::InternalCreateEncoder() { return -1; } 71 72 void ACMAMRwb::DestructEncoderSafe() { return; } 73 74 int16_t ACMAMRwb::SetBitRateSafe(const int32_t /* rate */) { return -1; } 75 76 void ACMAMRwb::InternalDestructEncoderInst(void* /* ptr_inst */) { return; } 77 78 int16_t ACMAMRwb::SetAMRwbEncoderPackingFormat( 79 ACMAMRPackingFormat /* packing_format */) { 80 return -1; 81 } 82 83 ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const { 84 return AMRUndefined; 85 } 86 87 int16_t ACMAMRwb::SetAMRwbDecoderPackingFormat( 88 ACMAMRPackingFormat /* packing_format */) { 89 return -1; 90 } 91 92 ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const { 93 return AMRUndefined; 94 } 95 96 #else //===================== Actual Implementation ======================= 97 98 #define AMRWB_MODE_7k 0 99 #define AMRWB_MODE_9k 1 100 #define AMRWB_MODE_12k 2 101 #define AMRWB_MODE_14k 3 102 #define AMRWB_MODE_16k 4 103 #define AMRWB_MODE_18k 5 104 #define AMRWB_MODE_20k 6 105 #define AMRWB_MODE_23k 7 106 #define AMRWB_MODE_24k 8 107 108 ACMAMRwb::ACMAMRwb(int16_t codec_id) 109 : encoder_inst_ptr_(NULL), 110 encoding_mode_(-1), // invalid value 111 encoding_rate_(0) { // invalid value 112 codec_id_ = codec_id; 113 has_internal_dtx_ = true; 114 encoder_packing_format_ = AMRBandwidthEfficient; 115 return; 116 } 117 118 ACMAMRwb::~ACMAMRwb() { 119 if (encoder_inst_ptr_ != NULL) { 120 WebRtcAmrWb_FreeEnc(encoder_inst_ptr_); 121 encoder_inst_ptr_ = NULL; 122 } 123 return; 124 } 125 126 int16_t ACMAMRwb::InternalEncode(uint8_t* bitstream, 127 int16_t* bitstream_len_byte) { 128 int16_t vad_decision = 1; 129 // sanity check, if the rate is set correctly. we might skip this 130 // sanity check. if rate is not set correctly, initialization flag 131 // should be false and should not be here. 132 if ((encoding_mode_ < AMRWB_MODE_7k) || (encoding_mode_ > AMRWB_MODE_24k)) { 133 *bitstream_len_byte = 0; 134 return -1; 135 } 136 *bitstream_len_byte = WebRtcAmrWb_Encode( 137 encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], frame_len_smpl_, 138 reinterpret_cast<int16_t*>(bitstream), encoding_mode_); 139 140 // Update VAD, if internal DTX is used 141 if (has_internal_dtx_ && dtx_enabled_) { 142 if (*bitstream_len_byte <= (7 * frame_len_smpl_ / 160)) { 143 vad_decision = 0; 144 } 145 for (int16_t n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) { 146 vad_label_[n] = vad_decision; 147 } 148 } 149 // increment the read index this tell the caller that how far 150 // we have gone forward in reading the audio buffer 151 in_audio_ix_read_ += frame_len_smpl_; 152 return *bitstream_len_byte; 153 } 154 155 int16_t ACMAMRwb::EnableDTX() { 156 if (dtx_enabled_) { 157 return 0; 158 } else if (encoder_exist_) { // check if encoder exist 159 // enable DTX 160 if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 1) < 0) { 161 return -1; 162 } 163 dtx_enabled_ = true; 164 return 0; 165 } else { 166 return -1; 167 } 168 } 169 170 int16_t ACMAMRwb::DisableDTX() { 171 if (!dtx_enabled_) { 172 return 0; 173 } else if (encoder_exist_) { // check if encoder exist 174 // disable DTX 175 if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 0) < 0) { 176 return -1; 177 } 178 dtx_enabled_ = false; 179 return 0; 180 } else { 181 // encoder doesn't exists, therefore disabling is harmless 182 return 0; 183 } 184 } 185 186 int16_t ACMAMRwb::InternalInitEncoder(WebRtcACMCodecParams* codec_params) { 187 // sanity check 188 if (encoder_inst_ptr_ == NULL) { 189 return -1; 190 } 191 192 int16_t status = SetBitRateSafe((codec_params->codec_inst).rate); 193 status += (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 194 ((codec_params->enable_dtx) ? 1 : 0)) < 0) 195 ? -1 196 : 0; 197 status += (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_, 198 encoder_packing_format_) < 0) 199 ? -1 200 : 0; 201 return (status < 0) ? -1 : 0; 202 } 203 204 ACMGenericCodec* ACMAMRwb::CreateInstance(void) { return NULL; } 205 206 int16_t ACMAMRwb::InternalCreateEncoder() { 207 return WebRtcAmrWb_CreateEnc(&encoder_inst_ptr_); 208 } 209 210 void ACMAMRwb::DestructEncoderSafe() { 211 if (encoder_inst_ptr_ != NULL) { 212 WebRtcAmrWb_FreeEnc(encoder_inst_ptr_); 213 encoder_inst_ptr_ = NULL; 214 } 215 // there is no encoder set the following 216 encoder_exist_ = false; 217 encoder_initialized_ = false; 218 encoding_mode_ = -1; // invalid value 219 encoding_rate_ = 0; 220 } 221 222 int16_t ACMAMRwb::SetBitRateSafe(const int32_t rate) { 223 switch (rate) { 224 case 7000: { 225 encoding_mode_ = AMRWB_MODE_7k; 226 encoding_rate_ = 7000; 227 break; 228 } 229 case 9000: { 230 encoding_mode_ = AMRWB_MODE_9k; 231 encoding_rate_ = 9000; 232 break; 233 } 234 case 12000: { 235 encoding_mode_ = AMRWB_MODE_12k; 236 encoding_rate_ = 12000; 237 break; 238 } 239 case 14000: { 240 encoding_mode_ = AMRWB_MODE_14k; 241 encoding_rate_ = 14000; 242 break; 243 } 244 case 16000: { 245 encoding_mode_ = AMRWB_MODE_16k; 246 encoding_rate_ = 16000; 247 break; 248 } 249 case 18000: { 250 encoding_mode_ = AMRWB_MODE_18k; 251 encoding_rate_ = 18000; 252 break; 253 } 254 case 20000: { 255 encoding_mode_ = AMRWB_MODE_20k; 256 encoding_rate_ = 20000; 257 break; 258 } 259 case 23000: { 260 encoding_mode_ = AMRWB_MODE_23k; 261 encoding_rate_ = 23000; 262 break; 263 } 264 case 24000: { 265 encoding_mode_ = AMRWB_MODE_24k; 266 encoding_rate_ = 24000; 267 break; 268 } 269 default: { 270 return -1; 271 } 272 } 273 return 0; 274 } 275 276 void ACMAMRwb::InternalDestructEncoderInst(void* ptr_inst) { 277 if (ptr_inst != NULL) { 278 WebRtcAmrWb_FreeEnc(static_cast<AMRWB_encinst_t_*>(ptr_inst)); 279 } 280 return; 281 } 282 283 int16_t ACMAMRwb::SetAMRwbEncoderPackingFormat( 284 ACMAMRPackingFormat packing_format) { 285 if ((packing_format != AMRBandwidthEfficient) && 286 (packing_format != AMROctetAlligned) && 287 (packing_format != AMRFileStorage)) { 288 WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_, 289 "Invalid AMRwb encoder packing-format."); 290 return -1; 291 } else { 292 if (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_, packing_format) < 0) { 293 return -1; 294 } else { 295 encoder_packing_format_ = packing_format; 296 return 0; 297 } 298 } 299 } 300 301 ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const { 302 return encoder_packing_format_; 303 } 304 305 int16_t ACMAMRwb::SetAMRwbDecoderPackingFormat( 306 ACMAMRPackingFormat packing_format) { 307 // Not implemented. 308 return -1; 309 } 310 311 ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const { 312 // Not implemented. 313 return AMRUndefined; 314 } 315 316 #endif 317 318 } // namespace acm2 319 320 } // namespace webrtc 321
