| /* |
| * 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 |