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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/audio_coding/main/source/acm_pcm16b.h"
#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h"
#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
#include "webrtc/system_wrappers/interface/trace.h"
#ifdef WEBRTC_CODEC_PCM16
#include "webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
#endif
namespace webrtc {
namespace acm1 {
#ifndef WEBRTC_CODEC_PCM16
ACMPCM16B::ACMPCM16B(int16_t /* codec_id */) {
return;
}
ACMPCM16B::~ACMPCM16B() {
return;
}
int16_t ACMPCM16B::InternalEncode(
uint8_t* /* bitstream */,
int16_t* /* bitstream_len_byte */) {
return -1;
}
int16_t ACMPCM16B::DecodeSafe(uint8_t* /* bitstream */,
int16_t /* bitstream_len_byte */,
int16_t* /* audio */,
int16_t* /* audio_samples */,
int8_t* /* speech_type */) {
return -1;
}
int16_t ACMPCM16B::InternalInitEncoder(
WebRtcACMCodecParams* /* codec_params */) {
return -1;
}
int16_t ACMPCM16B::InternalInitDecoder(
WebRtcACMCodecParams* /* codec_params */) {
return -1;
}
int32_t ACMPCM16B::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
const CodecInst& /* codec_inst */) {
return -1;
}
ACMGenericCodec* ACMPCM16B::CreateInstance(void) {
return NULL;
}
int16_t ACMPCM16B::InternalCreateEncoder() {
return -1;
}
int16_t ACMPCM16B::InternalCreateDecoder() {
return -1;
}
void ACMPCM16B::InternalDestructEncoderInst(void* /* ptr_inst */) {
return;
}
void ACMPCM16B::DestructEncoderSafe() {
return;
}
void ACMPCM16B::DestructDecoderSafe() {
return;
}
void ACMPCM16B::SplitStereoPacket(uint8_t* /*payload*/,
int32_t* /*payload_length*/) {
}
#else //===================== Actual Implementation =======================
ACMPCM16B::ACMPCM16B(int16_t codec_id) {
codec_id_ = codec_id;
sampling_freq_hz_ = ACMCodecDB::CodecFreq(codec_id_);
}
ACMPCM16B::~ACMPCM16B() {
return;
}
int16_t ACMPCM16B::InternalEncode(uint8_t* bitstream,
int16_t* bitstream_len_byte) {
*bitstream_len_byte = WebRtcPcm16b_Encode(&in_audio_[in_audio_ix_read_],
frame_len_smpl_ * num_channels_,
bitstream);
// Increment the read index to tell the caller that how far
// we have gone forward in reading the audio buffer.
in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
return *bitstream_len_byte;
}
int16_t ACMPCM16B::DecodeSafe(uint8_t* /* bitstream */,
int16_t /* bitstream_len_byte */,
int16_t* /* audio */,
int16_t* /* audio_samples */,
int8_t* /* speech_type */) {
return 0;
}
int16_t ACMPCM16B::InternalInitEncoder(
WebRtcACMCodecParams* /* codec_params */) {
// This codec does not need initialization, PCM has no instance.
return 0;
}
int16_t ACMPCM16B::InternalInitDecoder(
WebRtcACMCodecParams* /* codec_params */) {
// This codec does not need initialization, PCM has no instance.
return 0;
}
int32_t ACMPCM16B::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
const CodecInst& codec_inst) {
// Fill up the structure by calling "SET_CODEC_PAR" & "SET_PCMU_FUNCTION".
// Then call NetEQ to add the codec to it's database.
if (codec_inst.channels == 1) {
switch (sampling_freq_hz_) {
case 8000: {
SET_CODEC_PAR(codec_def, kDecoderPCM16B, codec_inst.pltype, NULL, 8000);
SET_PCM16B_FUNCTIONS(codec_def);
break;
}
case 16000: {
SET_CODEC_PAR(codec_def, kDecoderPCM16Bwb, codec_inst.pltype, NULL,
16000);
SET_PCM16B_WB_FUNCTIONS(codec_def);
break;
}
case 32000: {
SET_CODEC_PAR(codec_def, kDecoderPCM16Bswb32kHz, codec_inst.pltype,
NULL, 32000);
SET_PCM16B_SWB32_FUNCTIONS(codec_def);
break;
}
default: {
return -1;
}
}
} else {
switch (sampling_freq_hz_) {
case 8000: {
SET_CODEC_PAR(codec_def, kDecoderPCM16B_2ch, codec_inst.pltype, NULL,
8000);
SET_PCM16B_FUNCTIONS(codec_def);
break;
}
case 16000: {
SET_CODEC_PAR(codec_def, kDecoderPCM16Bwb_2ch, codec_inst.pltype,
NULL, 16000);
SET_PCM16B_WB_FUNCTIONS(codec_def);
break;
}
case 32000: {
SET_CODEC_PAR(codec_def, kDecoderPCM16Bswb32kHz_2ch, codec_inst.pltype,
NULL, 32000);
SET_PCM16B_SWB32_FUNCTIONS(codec_def);
break;
}
default: {
return -1;
}
}
}
return 0;
}
ACMGenericCodec* ACMPCM16B::CreateInstance(void) {
return NULL;
}
int16_t ACMPCM16B::InternalCreateEncoder() {
// PCM has no instance.
return 0;
}
int16_t ACMPCM16B::InternalCreateDecoder() {
// PCM has no instance.
return 0;
}
void ACMPCM16B::InternalDestructEncoderInst(void* /* ptr_inst */) {
// PCM has no instance.
return;
}
void ACMPCM16B::DestructEncoderSafe() {
// PCM has no instance.
encoder_exist_ = false;
encoder_initialized_ = false;
return;
}
void ACMPCM16B::DestructDecoderSafe() {
// PCM has no instance.
decoder_exist_ = false;
decoder_initialized_ = false;
return;
}
// Split the stereo packet and place left and right channel after each other
// in the payload vector.
void ACMPCM16B::SplitStereoPacket(uint8_t* payload, int32_t* payload_length) {
uint8_t right_byte_msb;
uint8_t right_byte_lsb;
// Check for valid inputs.
assert(payload != NULL);
assert(*payload_length > 0);
// Move two bytes representing right channel each loop, and place it at the
// end of the bytestream vector. After looping the data is reordered to:
// l1 l2 l3 l4 ... l(N-1) lN r1 r2 r3 r4 ... r(N-1) r(N),
// where N is the total number of samples.
for (int i = 0; i < *payload_length / 2; i += 2) {
right_byte_msb = payload[i + 2];
right_byte_lsb = payload[i + 3];
memmove(&payload[i + 2], &payload[i + 4], *payload_length - i - 4);
payload[*payload_length - 2] = right_byte_msb;
payload[*payload_length - 1] = right_byte_lsb;
}
}
#endif
} // namespace acm1
} // namespace webrtc