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| 1 /* | |
| 2 * Copyright (c) 2014 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_processing/utility/lapped_transform.h" | |
| 12 | |
| 13 #include <algorithm> | |
| 14 #include <cstdlib> | |
| 15 #include <cstring> | |
| 16 | |
| 17 #include "webrtc/base/checks.h" | |
| 18 #include "webrtc/common_audio/real_fourier.h" | |
| 19 | |
| 20 namespace webrtc { | |
| 21 | |
| 22 void LappedTransform::BlockThunk::ProcessBlock(const float* const* input, | |
| 23 size_t num_frames, | |
| 24 size_t num_input_channels, | |
| 25 size_t num_output_channels, | |
| 26 float* const* output) { | |
| 27 RTC_CHECK_EQ(num_input_channels, parent_->num_in_channels_); | |
| 28 RTC_CHECK_EQ(num_output_channels, parent_->num_out_channels_); | |
| 29 RTC_CHECK_EQ(parent_->block_length_, num_frames); | |
| 30 | |
| 31 for (size_t i = 0; i < num_input_channels; ++i) { | |
| 32 memcpy(parent_->real_buf_.Row(i), input[i], | |
| 33 num_frames * sizeof(*input[0])); | |
| 34 parent_->fft_->Forward(parent_->real_buf_.Row(i), | |
| 35 parent_->cplx_pre_.Row(i)); | |
| 36 } | |
| 37 | |
| 38 size_t block_length = RealFourier::ComplexLength( | |
| 39 RealFourier::FftOrder(num_frames)); | |
| 40 RTC_CHECK_EQ(parent_->cplx_length_, block_length); | |
| 41 parent_->block_processor_->ProcessAudioBlock(parent_->cplx_pre_.Array(), | |
| 42 num_input_channels, | |
| 43 parent_->cplx_length_, | |
| 44 num_output_channels, | |
| 45 parent_->cplx_post_.Array()); | |
| 46 | |
| 47 for (size_t i = 0; i < num_output_channels; ++i) { | |
| 48 parent_->fft_->Inverse(parent_->cplx_post_.Row(i), | |
| 49 parent_->real_buf_.Row(i)); | |
| 50 memcpy(output[i], parent_->real_buf_.Row(i), | |
| 51 num_frames * sizeof(*input[0])); | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 LappedTransform::LappedTransform(size_t num_in_channels, | |
| 56 size_t num_out_channels, | |
| 57 size_t chunk_length, | |
| 58 const float* window, | |
| 59 size_t block_length, | |
| 60 size_t shift_amount, | |
| 61 Callback* callback) | |
| 62 : blocker_callback_(this), | |
| 63 num_in_channels_(num_in_channels), | |
| 64 num_out_channels_(num_out_channels), | |
| 65 block_length_(block_length), | |
| 66 chunk_length_(chunk_length), | |
| 67 block_processor_(callback), | |
| 68 blocker_(chunk_length_, | |
| 69 block_length_, | |
| 70 num_in_channels_, | |
| 71 num_out_channels_, | |
| 72 window, | |
| 73 shift_amount, | |
| 74 &blocker_callback_), | |
| 75 fft_(rtc::ScopedToUnique( | |
| 76 RealFourier::Create(RealFourier::FftOrder(block_length_)))), | |
| 77 cplx_length_(RealFourier::ComplexLength(fft_->order())), | |
| 78 real_buf_(num_in_channels, | |
| 79 block_length_, | |
| 80 RealFourier::kFftBufferAlignment), | |
| 81 cplx_pre_(num_in_channels, | |
| 82 cplx_length_, | |
| 83 RealFourier::kFftBufferAlignment), | |
| 84 cplx_post_(num_out_channels, | |
| 85 cplx_length_, | |
| 86 RealFourier::kFftBufferAlignment) { | |
| 87 RTC_CHECK(num_in_channels_ > 0 && num_out_channels_ > 0); | |
| 88 RTC_CHECK_GT(block_length_, 0u); | |
| 89 RTC_CHECK_GT(chunk_length_, 0u); | |
| 90 RTC_CHECK(block_processor_); | |
| 91 | |
| 92 // block_length_ power of 2? | |
| 93 RTC_CHECK_EQ(0u, block_length_ & (block_length_ - 1)); | |
| 94 } | |
| 95 | |
| 96 void LappedTransform::ProcessChunk(const float* const* in_chunk, | |
| 97 float* const* out_chunk) { | |
| 98 blocker_.ProcessChunk(in_chunk, chunk_length_, num_in_channels_, | |
| 99 num_out_channels_, out_chunk); | |
| 100 } | |
| 101 | |
| 102 } // namespace webrtc | |
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Chromium Code Reviews
Issue 1855393004:
Revert of Moved ring-buffer related files from common_audio to audio_processing" (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master