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97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/audio_coding/main/acm2/acm_pcm16b.h"
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#ifdef WEBRTC_CODEC_PCM16
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#include "webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
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#include "webrtc/modules/audio_coding/main/acm2/acm_codec_database.h"
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#include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h"
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#include "webrtc/system_wrappers/interface/trace.h"
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#endif
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namespace webrtc {
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namespace acm2 {
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#ifndef WEBRTC_CODEC_PCM16
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ACMPCM16B::ACMPCM16B(int16_t /* codec_id */) { return; }
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ACMPCM16B::~ACMPCM16B() { return; }
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int16_t ACMPCM16B::InternalEncode(uint8_t* /* bitstream */,
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int16_t* /* bitstream_len_byte */) {
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return -1;
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}
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int16_t ACMPCM16B::InternalInitEncoder(
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WebRtcACMCodecParams* /* codec_params */) {
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return -1;
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}
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ACMGenericCodec* ACMPCM16B::CreateInstance(void) { return NULL; }
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int16_t ACMPCM16B::InternalCreateEncoder() { return -1; }
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void ACMPCM16B::InternalDestructEncoderInst(void* /* ptr_inst */) { return; }
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void ACMPCM16B::DestructEncoderSafe() { return; }
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#else //===================== Actual Implementation =======================
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ACMPCM16B::ACMPCM16B(int16_t codec_id) {
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codec_id_ = codec_id;
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sampling_freq_hz_ = ACMCodecDB::CodecFreq(codec_id_);
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}
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ACMPCM16B::~ACMPCM16B() { return; }
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int16_t ACMPCM16B::InternalEncode(uint8_t* bitstream,
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int16_t* bitstream_len_byte) {
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*bitstream_len_byte = WebRtcPcm16b_Encode(&in_audio_[in_audio_ix_read_],
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frame_len_smpl_ * num_channels_,
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bitstream);
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// Increment the read index to tell the caller that how far
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// we have gone forward in reading the audio buffer.
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in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
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return *bitstream_len_byte;
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}
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int16_t ACMPCM16B::InternalInitEncoder(
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WebRtcACMCodecParams* /* codec_params */) {
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// This codec does not need initialization, PCM has no instance.
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return 0;
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}
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ACMGenericCodec* ACMPCM16B::CreateInstance(void) { return NULL; }
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int16_t ACMPCM16B::InternalCreateEncoder() {
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// PCM has no instance.
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return 0;
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}
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void ACMPCM16B::InternalDestructEncoderInst(void* /* ptr_inst */) {
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// PCM has no instance.
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return;
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}
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void ACMPCM16B::DestructEncoderSafe() {
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// PCM has no instance.
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encoder_exist_ = false;
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encoder_initialized_ = false;
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return;
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}
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#endif
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} // namespace acm2
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} // namespace webrtc
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