48af652ea5
ACM1 code is wrapped in namespace acm1. Inculde paths and define guards of ACM2 source codes are corrected. gypi file of ACM2 is changed so that ACM1 will later on depends on ACM2. BUG= R=andrew@webrtc.org Review URL: https://webrtc-codereview.appspot.com/2206004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4743 4adac7df-926f-26a2-2b94-8c16560cd09d
135 lines
4.0 KiB
C++
135 lines
4.0 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/source/acm_pcma.h"
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#include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h"
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#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
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#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
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#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
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#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
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#include "webrtc/system_wrappers/interface/trace.h"
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// Codec interface
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namespace webrtc {
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namespace acm1 {
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ACMPCMA::ACMPCMA(int16_t codec_id) {
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codec_id_ = codec_id;
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}
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ACMPCMA::~ACMPCMA() {
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return;
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}
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int16_t ACMPCMA::InternalEncode(uint8_t* bitstream,
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int16_t* bitstream_len_byte) {
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*bitstream_len_byte = WebRtcG711_EncodeA(NULL, &in_audio_[in_audio_ix_read_],
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frame_len_smpl_ * num_channels_,
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(int16_t*) bitstream);
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// Increment the read index this 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 ACMPCMA::DecodeSafe(uint8_t* /* bitstream */,
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int16_t /* bitstream_len_byte */,
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int16_t* /* audio */,
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int16_t* /* audio_samples */,
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int8_t* /* speech_type */) {
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return 0;
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}
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int16_t ACMPCMA::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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int16_t ACMPCMA::InternalInitDecoder(
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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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int32_t ACMPCMA::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
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const CodecInst& codec_inst) {
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// Fill up the structure by calling
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// "SET_CODEC_PAR" & "SET_PCMA_FUNCTION."
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// Then call NetEQ to add the codec to it's database.
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if (codec_inst.channels == 1) {
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// Mono mode.
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SET_CODEC_PAR(codec_def, kDecoderPCMa, codec_inst.pltype, NULL, 8000);
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} else {
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// Stereo mode.
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SET_CODEC_PAR(codec_def, kDecoderPCMa_2ch, codec_inst.pltype, NULL, 8000);
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}
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SET_PCMA_FUNCTIONS(codec_def);
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return 0;
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}
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ACMGenericCodec* ACMPCMA::CreateInstance(void) {
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return NULL;
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}
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int16_t ACMPCMA::InternalCreateEncoder() {
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// PCM has no instance.
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return 0;
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}
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int16_t ACMPCMA::InternalCreateDecoder() {
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// PCM has no instance.
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return 0;
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}
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void ACMPCMA::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 ACMPCMA::DestructEncoderSafe() {
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// PCM has no instance.
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return;
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}
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void ACMPCMA::DestructDecoderSafe() {
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// PCM has no instance.
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decoder_initialized_ = false;
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decoder_exist_ = false;
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return;
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}
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// Split the stereo packet and place left and right channel after each other
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// in the payload vector.
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void ACMPCMA::SplitStereoPacket(uint8_t* payload, int32_t* payload_length) {
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uint8_t right_byte;
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// Check for valid inputs.
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assert(payload != NULL);
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assert(*payload_length > 0);
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// Move one bytes representing right channel each loop, and place it at the
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// end of the bytestream vector. After looping the data is reordered to:
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// l1 l2 l3 l4 ... l(N-1) lN r1 r2 r3 r4 ... r(N-1) r(N),
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// where N is the total number of samples.
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for (int i = 0; i < *payload_length / 2; i++) {
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right_byte = payload[i + 1];
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memmove(&payload[i + 1], &payload[i + 2], *payload_length - i - 2);
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payload[*payload_length - 1] = right_byte;
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}
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}
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} // namespace acm1
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} // namespace webrtc
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