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_pcma.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 ACMPCMA::ACMPCMA(int16_t codec_id) { codec_id_ = codec_id; } 24 25 ACMPCMA::~ACMPCMA() { return; } 26 27 int16_t ACMPCMA::InternalEncode(uint8_t* bitstream, 28 int16_t* bitstream_len_byte) { 29 *bitstream_len_byte = WebRtcG711_EncodeA( 30 NULL, &in_audio_[in_audio_ix_read_], frame_len_smpl_ * num_channels_, 31 reinterpret_cast<int16_t*>(bitstream)); 32 // Increment the read index this tell the caller that how far 33 // we have gone forward in reading the audio buffer. 34 in_audio_ix_read_ += frame_len_smpl_ * num_channels_; 35 return *bitstream_len_byte; 36 } 37 38 int16_t ACMPCMA::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) { 39 // This codec does not need initialization, PCM has no instance. 40 return 0; 41 } 42 43 ACMGenericCodec* ACMPCMA::CreateInstance(void) { return NULL; } 44 45 int16_t ACMPCMA::InternalCreateEncoder() { 46 // PCM has no instance. 47 return 0; 48 } 49 50 void ACMPCMA::InternalDestructEncoderInst(void* /* ptr_inst */) { 51 // PCM has no instance. 52 return; 53 } 54 55 void ACMPCMA::DestructEncoderSafe() { 56 // PCM has no instance. 57 return; 58 } 59 60 } // namespace acm2 61 62 } // namespace webrtc 63
