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 int16_t ACMAMRwb::SetAMRwbEncoderPackingFormat( 77 ACMAMRPackingFormat /* packing_format */) { 78 return -1; 79 } 80 81 ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const { 82 return AMRUndefined; 83 } 84 85 int16_t ACMAMRwb::SetAMRwbDecoderPackingFormat( 86 ACMAMRPackingFormat /* packing_format */) { 87 return -1; 88 } 89 90 ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const { 91 return AMRUndefined; 92 } 93 94 #else //===================== Actual Implementation ======================= 95 96 #define AMRWB_MODE_7k 0 97 #define AMRWB_MODE_9k 1 98 #define AMRWB_MODE_12k 2 99 #define AMRWB_MODE_14k 3 100 #define AMRWB_MODE_16k 4 101 #define AMRWB_MODE_18k 5 102 #define AMRWB_MODE_20k 6 103 #define AMRWB_MODE_23k 7 104 #define AMRWB_MODE_24k 8 105 106 ACMAMRwb::ACMAMRwb(int16_t codec_id) 107 : encoder_inst_ptr_(NULL), 108 encoding_mode_(-1), // invalid value 109 encoding_rate_(0) { // invalid value 110 codec_id_ = codec_id; 111 has_internal_dtx_ = true; 112 encoder_packing_format_ = AMRBandwidthEfficient; 113 return; 114 } 115 116 ACMAMRwb::~ACMAMRwb() { 117 if (encoder_inst_ptr_ != NULL) { 118 WebRtcAmrWb_FreeEnc(encoder_inst_ptr_); 119 encoder_inst_ptr_ = NULL; 120 } 121 return; 122 } 123 124 int16_t ACMAMRwb::InternalEncode(uint8_t* bitstream, 125 int16_t* bitstream_len_byte) { 126 int16_t vad_decision = 1; 127 // sanity check, if the rate is set correctly. we might skip this 128 // sanity check. if rate is not set correctly, initialization flag 129 // should be false and should not be here. 130 if ((encoding_mode_ < AMRWB_MODE_7k) || (encoding_mode_ > AMRWB_MODE_24k)) { 131 *bitstream_len_byte = 0; 132 return -1; 133 } 134 *bitstream_len_byte = WebRtcAmrWb_Encode( 135 encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], frame_len_smpl_, 136 reinterpret_cast<int16_t*>(bitstream), encoding_mode_); 137 138 // Update VAD, if internal DTX is used 139 if (has_internal_dtx_ && dtx_enabled_) { 140 if (*bitstream_len_byte <= (7 * frame_len_smpl_ / 160)) { 141 vad_decision = 0; 142 } 143 for (int16_t n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) { 144 vad_label_[n] = vad_decision; 145 } 146 } 147 // increment the read index this tell the caller that how far 148 // we have gone forward in reading the audio buffer 149 in_audio_ix_read_ += frame_len_smpl_; 150 return *bitstream_len_byte; 151 } 152 153 int16_t ACMAMRwb::EnableDTX() { 154 if (dtx_enabled_) { 155 return 0; 156 } else if (encoder_exist_) { // check if encoder exist 157 // enable DTX 158 if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 1) < 0) { 159 return -1; 160 } 161 dtx_enabled_ = true; 162 return 0; 163 } else { 164 return -1; 165 } 166 } 167 168 int16_t ACMAMRwb::DisableDTX() { 169 if (!dtx_enabled_) { 170 return 0; 171 } else if (encoder_exist_) { // check if encoder exist 172 // disable DTX 173 if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 0) < 0) { 174 return -1; 175 } 176 dtx_enabled_ = false; 177 return 0; 178 } else { 179 // encoder doesn't exists, therefore disabling is harmless 180 return 0; 181 } 182 } 183 184 int16_t ACMAMRwb::InternalInitEncoder(WebRtcACMCodecParams* codec_params) { 185 // sanity check 186 if (encoder_inst_ptr_ == NULL) { 187 return -1; 188 } 189 190 int16_t status = SetBitRateSafe((codec_params->codec_inst).rate); 191 status += (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 192 ((codec_params->enable_dtx) ? 1 : 0)) < 0) 193 ? -1 194 : 0; 195 status += (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_, 196 encoder_packing_format_) < 0) 197 ? -1 198 : 0; 199 return (status < 0) ? -1 : 0; 200 } 201 202 ACMGenericCodec* ACMAMRwb::CreateInstance(void) { return NULL; } 203 204 int16_t ACMAMRwb::InternalCreateEncoder() { 205 return WebRtcAmrWb_CreateEnc(&encoder_inst_ptr_); 206 } 207 208 void ACMAMRwb::DestructEncoderSafe() { 209 if (encoder_inst_ptr_ != NULL) { 210 WebRtcAmrWb_FreeEnc(encoder_inst_ptr_); 211 encoder_inst_ptr_ = NULL; 212 } 213 // there is no encoder set the following 214 encoder_exist_ = false; 215 encoder_initialized_ = false; 216 encoding_mode_ = -1; // invalid value 217 encoding_rate_ = 0; 218 } 219 220 int16_t ACMAMRwb::SetBitRateSafe(const int32_t rate) { 221 switch (rate) { 222 case 7000: { 223 encoding_mode_ = AMRWB_MODE_7k; 224 encoding_rate_ = 7000; 225 break; 226 } 227 case 9000: { 228 encoding_mode_ = AMRWB_MODE_9k; 229 encoding_rate_ = 9000; 230 break; 231 } 232 case 12000: { 233 encoding_mode_ = AMRWB_MODE_12k; 234 encoding_rate_ = 12000; 235 break; 236 } 237 case 14000: { 238 encoding_mode_ = AMRWB_MODE_14k; 239 encoding_rate_ = 14000; 240 break; 241 } 242 case 16000: { 243 encoding_mode_ = AMRWB_MODE_16k; 244 encoding_rate_ = 16000; 245 break; 246 } 247 case 18000: { 248 encoding_mode_ = AMRWB_MODE_18k; 249 encoding_rate_ = 18000; 250 break; 251 } 252 case 20000: { 253 encoding_mode_ = AMRWB_MODE_20k; 254 encoding_rate_ = 20000; 255 break; 256 } 257 case 23000: { 258 encoding_mode_ = AMRWB_MODE_23k; 259 encoding_rate_ = 23000; 260 break; 261 } 262 case 24000: { 263 encoding_mode_ = AMRWB_MODE_24k; 264 encoding_rate_ = 24000; 265 break; 266 } 267 default: { 268 return -1; 269 } 270 } 271 return 0; 272 } 273 274 int16_t ACMAMRwb::SetAMRwbEncoderPackingFormat( 275 ACMAMRPackingFormat packing_format) { 276 if ((packing_format != AMRBandwidthEfficient) && 277 (packing_format != AMROctetAlligned) && 278 (packing_format != AMRFileStorage)) { 279 WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_, 280 "Invalid AMRwb encoder packing-format."); 281 return -1; 282 } else { 283 if (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_, packing_format) < 0) { 284 return -1; 285 } else { 286 encoder_packing_format_ = packing_format; 287 return 0; 288 } 289 } 290 } 291 292 ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const { 293 return encoder_packing_format_; 294 } 295 296 int16_t ACMAMRwb::SetAMRwbDecoderPackingFormat( 297 ACMAMRPackingFormat packing_format) { 298 // Not implemented. 299 return -1; 300 } 301 302 ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const { 303 // Not implemented. 304 return AMRUndefined; 305 } 306 307 #endif 308 309 } // namespace acm2 310 311 } // namespace webrtc 312
