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_pcmu.h" 12 13 #include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h" 14 #include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h" 15 #include "webrtc/system_wrappers/interface/trace.h" 16 17 // Codec interface. 18 19 namespace webrtc { 20 21 namespace acm2 { 22 23 ACMPCMU::ACMPCMU(int16_t codec_id) { codec_id_ = codec_id; } 24 25 ACMPCMU::~ACMPCMU() {} 26 27 int16_t ACMPCMU::InternalEncode(uint8_t* bitstream, 28 int16_t* bitstream_len_byte) { 29 *bitstream_len_byte = WebRtcG711_EncodeU( 30 NULL, &in_audio_[in_audio_ix_read_], frame_len_smpl_ * num_channels_, 31 reinterpret_cast<int16_t*>(bitstream)); 32 33 // Increment the read index this tell the caller that how far 34 // we have gone forward in reading the audio buffer. 35 in_audio_ix_read_ += frame_len_smpl_ * num_channels_; 36 return *bitstream_len_byte; 37 } 38 39 int16_t ACMPCMU::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) { 40 // This codec does not need initialization, PCM has no instance. 41 return 0; 42 } 43 44 ACMGenericCodec* ACMPCMU::CreateInstance(void) { return NULL; } 45 46 int16_t ACMPCMU::InternalCreateEncoder() { 47 // PCM has no instance. 48 return 0; 49 } 50 51 void ACMPCMU::DestructEncoderSafe() { 52 // PCM has no instance. 53 encoder_exist_ = false; 54 encoder_initialized_ = false; 55 } 56 57 } // namespace acm2 58 59 } // namespace webrtc 60
