960 lines
31 KiB
C++
960 lines
31 KiB
C++
/*
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* Copyright (c) 2011 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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/*
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* A wrapper for resampling a numerous amount of sampling combinations.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "webrtc/common_audio/resampler/include/resampler.h"
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#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
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namespace webrtc {
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Resampler::Resampler()
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: state1_(nullptr),
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state2_(nullptr),
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state3_(nullptr),
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in_buffer_(nullptr),
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out_buffer_(nullptr),
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in_buffer_size_(0),
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out_buffer_size_(0),
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in_buffer_size_max_(0),
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out_buffer_size_max_(0),
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my_in_frequency_khz_(0),
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my_out_frequency_khz_(0),
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my_mode_(kResamplerMode1To1),
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num_channels_(0),
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slave_left_(nullptr),
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slave_right_(nullptr) {
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}
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Resampler::Resampler(int inFreq, int outFreq, size_t num_channels)
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: Resampler() {
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Reset(inFreq, outFreq, num_channels);
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}
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Resampler::~Resampler()
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{
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if (state1_)
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{
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free(state1_);
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}
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if (state2_)
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{
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free(state2_);
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}
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if (state3_)
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{
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free(state3_);
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}
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if (in_buffer_)
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{
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free(in_buffer_);
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}
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if (out_buffer_)
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{
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free(out_buffer_);
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}
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if (slave_left_)
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{
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delete slave_left_;
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}
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if (slave_right_)
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{
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delete slave_right_;
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}
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}
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int Resampler::ResetIfNeeded(int inFreq, int outFreq, size_t num_channels)
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{
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int tmpInFreq_kHz = inFreq / 1000;
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int tmpOutFreq_kHz = outFreq / 1000;
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if ((tmpInFreq_kHz != my_in_frequency_khz_) || (tmpOutFreq_kHz != my_out_frequency_khz_)
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|| (num_channels != num_channels_))
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{
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return Reset(inFreq, outFreq, num_channels);
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} else
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{
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return 0;
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}
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}
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int Resampler::Reset(int inFreq, int outFreq, size_t num_channels)
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{
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if (num_channels != 1 && num_channels != 2) {
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return -1;
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}
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num_channels_ = num_channels;
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if (state1_)
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{
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free(state1_);
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state1_ = NULL;
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}
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if (state2_)
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{
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free(state2_);
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state2_ = NULL;
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}
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if (state3_)
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{
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free(state3_);
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state3_ = NULL;
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}
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if (in_buffer_)
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{
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free(in_buffer_);
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in_buffer_ = NULL;
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}
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if (out_buffer_)
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{
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free(out_buffer_);
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out_buffer_ = NULL;
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}
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if (slave_left_)
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{
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delete slave_left_;
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slave_left_ = NULL;
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}
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if (slave_right_)
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{
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delete slave_right_;
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slave_right_ = NULL;
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}
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in_buffer_size_ = 0;
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out_buffer_size_ = 0;
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in_buffer_size_max_ = 0;
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out_buffer_size_max_ = 0;
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// Start with a math exercise, Euclid's algorithm to find the gcd:
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int a = inFreq;
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int b = outFreq;
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int c = a % b;
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while (c != 0)
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{
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a = b;
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b = c;
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c = a % b;
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}
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// b is now the gcd;
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// We need to track what domain we're in.
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my_in_frequency_khz_ = inFreq / 1000;
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my_out_frequency_khz_ = outFreq / 1000;
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// Scale with GCD
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inFreq = inFreq / b;
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outFreq = outFreq / b;
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if (num_channels_ == 2)
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{
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// Create two mono resamplers.
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slave_left_ = new Resampler(inFreq, outFreq, 1);
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slave_right_ = new Resampler(inFreq, outFreq, 1);
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}
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if (inFreq == outFreq)
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{
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my_mode_ = kResamplerMode1To1;
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} else if (inFreq == 1)
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{
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switch (outFreq)
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{
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case 2:
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my_mode_ = kResamplerMode1To2;
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break;
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case 3:
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my_mode_ = kResamplerMode1To3;
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break;
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case 4:
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my_mode_ = kResamplerMode1To4;
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break;
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case 6:
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my_mode_ = kResamplerMode1To6;
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break;
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case 12:
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my_mode_ = kResamplerMode1To12;
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break;
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default:
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return -1;
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}
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} else if (outFreq == 1)
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{
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switch (inFreq)
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{
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case 2:
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my_mode_ = kResamplerMode2To1;
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break;
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case 3:
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my_mode_ = kResamplerMode3To1;
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break;
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case 4:
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my_mode_ = kResamplerMode4To1;
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break;
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case 6:
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my_mode_ = kResamplerMode6To1;
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break;
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case 12:
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my_mode_ = kResamplerMode12To1;
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break;
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default:
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return -1;
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}
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} else if ((inFreq == 2) && (outFreq == 3))
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{
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my_mode_ = kResamplerMode2To3;
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} else if ((inFreq == 2) && (outFreq == 11))
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{
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my_mode_ = kResamplerMode2To11;
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} else if ((inFreq == 4) && (outFreq == 11))
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{
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my_mode_ = kResamplerMode4To11;
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} else if ((inFreq == 8) && (outFreq == 11))
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{
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my_mode_ = kResamplerMode8To11;
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} else if ((inFreq == 3) && (outFreq == 2))
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{
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my_mode_ = kResamplerMode3To2;
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} else if ((inFreq == 11) && (outFreq == 2))
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{
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my_mode_ = kResamplerMode11To2;
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} else if ((inFreq == 11) && (outFreq == 4))
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{
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my_mode_ = kResamplerMode11To4;
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} else if ((inFreq == 11) && (outFreq == 16))
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{
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my_mode_ = kResamplerMode11To16;
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} else if ((inFreq == 11) && (outFreq == 32))
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{
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my_mode_ = kResamplerMode11To32;
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} else if ((inFreq == 11) && (outFreq == 8))
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{
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my_mode_ = kResamplerMode11To8;
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} else
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{
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return -1;
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}
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// Now create the states we need
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switch (my_mode_)
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{
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case kResamplerMode1To1:
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// No state needed;
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break;
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case kResamplerMode1To2:
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode1To3:
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state1_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
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WebRtcSpl_ResetResample16khzTo48khz((WebRtcSpl_State16khzTo48khz *)state1_);
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break;
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case kResamplerMode1To4:
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// 1:2
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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// 2:4
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode1To6:
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// 1:2
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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// 2:6
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state2_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
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WebRtcSpl_ResetResample16khzTo48khz((WebRtcSpl_State16khzTo48khz *)state2_);
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break;
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case kResamplerMode1To12:
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// 1:2
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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// 2:4
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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// 4:12
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state3_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
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WebRtcSpl_ResetResample16khzTo48khz(
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(WebRtcSpl_State16khzTo48khz*) state3_);
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break;
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case kResamplerMode2To3:
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// 2:6
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state1_ = malloc(sizeof(WebRtcSpl_State16khzTo48khz));
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WebRtcSpl_ResetResample16khzTo48khz((WebRtcSpl_State16khzTo48khz *)state1_);
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// 6:3
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode2To11:
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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state2_ = malloc(sizeof(WebRtcSpl_State8khzTo22khz));
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WebRtcSpl_ResetResample8khzTo22khz((WebRtcSpl_State8khzTo22khz *)state2_);
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break;
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case kResamplerMode4To11:
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state1_ = malloc(sizeof(WebRtcSpl_State8khzTo22khz));
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WebRtcSpl_ResetResample8khzTo22khz((WebRtcSpl_State8khzTo22khz *)state1_);
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break;
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case kResamplerMode8To11:
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state1_ = malloc(sizeof(WebRtcSpl_State16khzTo22khz));
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WebRtcSpl_ResetResample16khzTo22khz((WebRtcSpl_State16khzTo22khz *)state1_);
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break;
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case kResamplerMode11To16:
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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state2_ = malloc(sizeof(WebRtcSpl_State22khzTo16khz));
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WebRtcSpl_ResetResample22khzTo16khz((WebRtcSpl_State22khzTo16khz *)state2_);
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break;
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case kResamplerMode11To32:
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// 11 -> 22
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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// 22 -> 16
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state2_ = malloc(sizeof(WebRtcSpl_State22khzTo16khz));
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WebRtcSpl_ResetResample22khzTo16khz((WebRtcSpl_State22khzTo16khz *)state2_);
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// 16 -> 32
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state3_ = malloc(8 * sizeof(int32_t));
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memset(state3_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode2To1:
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode3To1:
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state1_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
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WebRtcSpl_ResetResample48khzTo16khz((WebRtcSpl_State48khzTo16khz *)state1_);
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break;
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case kResamplerMode4To1:
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// 4:2
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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// 2:1
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode6To1:
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// 6:2
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state1_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
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WebRtcSpl_ResetResample48khzTo16khz((WebRtcSpl_State48khzTo16khz *)state1_);
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// 2:1
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode12To1:
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// 12:4
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state1_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
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WebRtcSpl_ResetResample48khzTo16khz(
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(WebRtcSpl_State48khzTo16khz*) state1_);
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// 4:2
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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// 2:1
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state3_ = malloc(8 * sizeof(int32_t));
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memset(state3_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode3To2:
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// 3:6
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state1_ = malloc(8 * sizeof(int32_t));
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memset(state1_, 0, 8 * sizeof(int32_t));
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// 6:2
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state2_ = malloc(sizeof(WebRtcSpl_State48khzTo16khz));
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WebRtcSpl_ResetResample48khzTo16khz((WebRtcSpl_State48khzTo16khz *)state2_);
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break;
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case kResamplerMode11To2:
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state1_ = malloc(sizeof(WebRtcSpl_State22khzTo8khz));
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WebRtcSpl_ResetResample22khzTo8khz((WebRtcSpl_State22khzTo8khz *)state1_);
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state2_ = malloc(8 * sizeof(int32_t));
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memset(state2_, 0, 8 * sizeof(int32_t));
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break;
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case kResamplerMode11To4:
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state1_ = malloc(sizeof(WebRtcSpl_State22khzTo8khz));
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WebRtcSpl_ResetResample22khzTo8khz((WebRtcSpl_State22khzTo8khz *)state1_);
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break;
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case kResamplerMode11To8:
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state1_ = malloc(sizeof(WebRtcSpl_State22khzTo16khz));
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WebRtcSpl_ResetResample22khzTo16khz((WebRtcSpl_State22khzTo16khz *)state1_);
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break;
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}
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return 0;
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}
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// Synchronous resampling, all output samples are written to samplesOut
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int Resampler::Push(const int16_t * samplesIn, size_t lengthIn,
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int16_t* samplesOut, size_t maxLen, size_t &outLen)
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{
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if (num_channels_ == 2)
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{
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// Split up the signal and call the slave object for each channel
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int16_t* left = (int16_t*)malloc(lengthIn * sizeof(int16_t) / 2);
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int16_t* right = (int16_t*)malloc(lengthIn * sizeof(int16_t) / 2);
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int16_t* out_left = (int16_t*)malloc(maxLen / 2 * sizeof(int16_t));
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int16_t* out_right =
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(int16_t*)malloc(maxLen / 2 * sizeof(int16_t));
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int res = 0;
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for (size_t i = 0; i < lengthIn; i += 2)
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{
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left[i >> 1] = samplesIn[i];
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right[i >> 1] = samplesIn[i + 1];
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}
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// It's OK to overwrite the local parameter, since it's just a copy
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lengthIn = lengthIn / 2;
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size_t actualOutLen_left = 0;
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size_t actualOutLen_right = 0;
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// Do resampling for right channel
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res |= slave_left_->Push(left, lengthIn, out_left, maxLen / 2, actualOutLen_left);
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res |= slave_right_->Push(right, lengthIn, out_right, maxLen / 2, actualOutLen_right);
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if (res || (actualOutLen_left != actualOutLen_right))
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{
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free(left);
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free(right);
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free(out_left);
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free(out_right);
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return -1;
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}
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// Reassemble the signal
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for (size_t i = 0; i < actualOutLen_left; i++)
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{
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samplesOut[i * 2] = out_left[i];
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samplesOut[i * 2 + 1] = out_right[i];
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}
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outLen = 2 * actualOutLen_left;
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free(left);
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free(right);
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free(out_left);
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free(out_right);
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return 0;
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}
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// Containers for temp samples
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int16_t* tmp;
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int16_t* tmp_2;
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// tmp data for resampling routines
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int32_t* tmp_mem;
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switch (my_mode_)
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{
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case kResamplerMode1To1:
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memcpy(samplesOut, samplesIn, lengthIn * sizeof(int16_t));
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outLen = lengthIn;
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break;
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case kResamplerMode1To2:
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if (maxLen < (lengthIn * 2))
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{
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return -1;
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}
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WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, samplesOut, (int32_t*)state1_);
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outLen = lengthIn * 2;
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return 0;
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case kResamplerMode1To3:
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// We can only handle blocks of 160 samples
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// Can be fixed, but I don't think it's needed
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if ((lengthIn % 160) != 0)
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{
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return -1;
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}
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if (maxLen < (lengthIn * 3))
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{
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return -1;
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}
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tmp_mem = (int32_t*)malloc(336 * sizeof(int32_t));
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for (size_t i = 0; i < lengthIn; i += 160)
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{
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WebRtcSpl_Resample16khzTo48khz(samplesIn + i, samplesOut + i * 3,
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(WebRtcSpl_State16khzTo48khz *)state1_,
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tmp_mem);
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}
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outLen = lengthIn * 3;
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free(tmp_mem);
|
|
return 0;
|
|
case kResamplerMode1To4:
|
|
if (maxLen < (lengthIn * 4))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
tmp = (int16_t*)malloc(sizeof(int16_t) * 2 * lengthIn);
|
|
// 1:2
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp, (int32_t*)state1_);
|
|
// 2:4
|
|
WebRtcSpl_UpsampleBy2(tmp, lengthIn * 2, samplesOut, (int32_t*)state2_);
|
|
outLen = lengthIn * 4;
|
|
free(tmp);
|
|
return 0;
|
|
case kResamplerMode1To6:
|
|
// We can only handle blocks of 80 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 80) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < (lengthIn * 6))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
//1:2
|
|
|
|
tmp_mem = (int32_t*)malloc(336 * sizeof(int32_t));
|
|
tmp = (int16_t*)malloc(sizeof(int16_t) * 2 * lengthIn);
|
|
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp, (int32_t*)state1_);
|
|
outLen = lengthIn * 2;
|
|
|
|
for (size_t i = 0; i < outLen; i += 160)
|
|
{
|
|
WebRtcSpl_Resample16khzTo48khz(tmp + i, samplesOut + i * 3,
|
|
(WebRtcSpl_State16khzTo48khz *)state2_,
|
|
tmp_mem);
|
|
}
|
|
outLen = outLen * 3;
|
|
free(tmp_mem);
|
|
free(tmp);
|
|
|
|
return 0;
|
|
case kResamplerMode1To12:
|
|
// We can only handle blocks of 40 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 40) != 0) {
|
|
return -1;
|
|
}
|
|
if (maxLen < (lengthIn * 12)) {
|
|
return -1;
|
|
}
|
|
|
|
tmp_mem = (int32_t*) malloc(336 * sizeof(int32_t));
|
|
tmp = (int16_t*) malloc(sizeof(int16_t) * 4 * lengthIn);
|
|
//1:2
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, samplesOut,
|
|
(int32_t*) state1_);
|
|
outLen = lengthIn * 2;
|
|
//2:4
|
|
WebRtcSpl_UpsampleBy2(samplesOut, outLen, tmp, (int32_t*) state2_);
|
|
outLen = outLen * 2;
|
|
// 4:12
|
|
for (size_t i = 0; i < outLen; i += 160) {
|
|
// WebRtcSpl_Resample16khzTo48khz() takes a block of 160 samples
|
|
// as input and outputs a resampled block of 480 samples. The
|
|
// data is now actually in 32 kHz sampling rate, despite the
|
|
// function name, and with a resampling factor of three becomes
|
|
// 96 kHz.
|
|
WebRtcSpl_Resample16khzTo48khz(tmp + i, samplesOut + i * 3,
|
|
(WebRtcSpl_State16khzTo48khz*) state3_,
|
|
tmp_mem);
|
|
}
|
|
outLen = outLen * 3;
|
|
free(tmp_mem);
|
|
free(tmp);
|
|
|
|
return 0;
|
|
case kResamplerMode2To3:
|
|
if (maxLen < (lengthIn * 3 / 2))
|
|
{
|
|
return -1;
|
|
}
|
|
// 2:6
|
|
// We can only handle blocks of 160 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 160) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
tmp = static_cast<int16_t*> (malloc(sizeof(int16_t) * lengthIn * 3));
|
|
tmp_mem = (int32_t*)malloc(336 * sizeof(int32_t));
|
|
for (size_t i = 0; i < lengthIn; i += 160)
|
|
{
|
|
WebRtcSpl_Resample16khzTo48khz(samplesIn + i, tmp + i * 3,
|
|
(WebRtcSpl_State16khzTo48khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
lengthIn = lengthIn * 3;
|
|
// 6:3
|
|
WebRtcSpl_DownsampleBy2(tmp, lengthIn, samplesOut, (int32_t*)state2_);
|
|
outLen = lengthIn / 2;
|
|
free(tmp);
|
|
free(tmp_mem);
|
|
return 0;
|
|
case kResamplerMode2To11:
|
|
|
|
// We can only handle blocks of 80 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 80) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 11) / 2))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp = (int16_t*)malloc(sizeof(int16_t) * 2 * lengthIn);
|
|
// 1:2
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp, (int32_t*)state1_);
|
|
lengthIn *= 2;
|
|
|
|
tmp_mem = (int32_t*)malloc(98 * sizeof(int32_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 80)
|
|
{
|
|
WebRtcSpl_Resample8khzTo22khz(tmp + i, samplesOut + (i * 11) / 4,
|
|
(WebRtcSpl_State8khzTo22khz *)state2_,
|
|
tmp_mem);
|
|
}
|
|
outLen = (lengthIn * 11) / 4;
|
|
free(tmp_mem);
|
|
free(tmp);
|
|
return 0;
|
|
case kResamplerMode4To11:
|
|
|
|
// We can only handle blocks of 80 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 80) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 11) / 4))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(98 * sizeof(int32_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 80)
|
|
{
|
|
WebRtcSpl_Resample8khzTo22khz(samplesIn + i, samplesOut + (i * 11) / 4,
|
|
(WebRtcSpl_State8khzTo22khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = (lengthIn * 11) / 4;
|
|
free(tmp_mem);
|
|
return 0;
|
|
case kResamplerMode8To11:
|
|
// We can only handle blocks of 160 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 160) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 11) / 8))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(88 * sizeof(int32_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 160)
|
|
{
|
|
WebRtcSpl_Resample16khzTo22khz(samplesIn + i, samplesOut + (i * 11) / 8,
|
|
(WebRtcSpl_State16khzTo22khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = (lengthIn * 11) / 8;
|
|
free(tmp_mem);
|
|
return 0;
|
|
|
|
case kResamplerMode11To16:
|
|
// We can only handle blocks of 110 samples
|
|
if ((lengthIn % 110) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 16) / 11))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
tmp_mem = (int32_t*)malloc(104 * sizeof(int32_t));
|
|
tmp = (int16_t*)malloc((sizeof(int16_t) * lengthIn * 2));
|
|
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp, (int32_t*)state1_);
|
|
|
|
for (size_t i = 0; i < (lengthIn * 2); i += 220)
|
|
{
|
|
WebRtcSpl_Resample22khzTo16khz(tmp + i, samplesOut + (i / 220) * 160,
|
|
(WebRtcSpl_State22khzTo16khz *)state2_,
|
|
tmp_mem);
|
|
}
|
|
|
|
outLen = (lengthIn * 16) / 11;
|
|
|
|
free(tmp_mem);
|
|
free(tmp);
|
|
return 0;
|
|
|
|
case kResamplerMode11To32:
|
|
|
|
// We can only handle blocks of 110 samples
|
|
if ((lengthIn % 110) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 32) / 11))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
tmp_mem = (int32_t*)malloc(104 * sizeof(int32_t));
|
|
tmp = (int16_t*)malloc((sizeof(int16_t) * lengthIn * 2));
|
|
|
|
// 11 -> 22 kHz in samplesOut
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, samplesOut, (int32_t*)state1_);
|
|
|
|
// 22 -> 16 in tmp
|
|
for (size_t i = 0; i < (lengthIn * 2); i += 220)
|
|
{
|
|
WebRtcSpl_Resample22khzTo16khz(samplesOut + i, tmp + (i / 220) * 160,
|
|
(WebRtcSpl_State22khzTo16khz *)state2_,
|
|
tmp_mem);
|
|
}
|
|
|
|
// 16 -> 32 in samplesOut
|
|
WebRtcSpl_UpsampleBy2(tmp, (lengthIn * 16) / 11, samplesOut,
|
|
(int32_t*)state3_);
|
|
|
|
outLen = (lengthIn * 32) / 11;
|
|
|
|
free(tmp_mem);
|
|
free(tmp);
|
|
return 0;
|
|
|
|
case kResamplerMode2To1:
|
|
if (maxLen < (lengthIn / 2))
|
|
{
|
|
return -1;
|
|
}
|
|
WebRtcSpl_DownsampleBy2(samplesIn, lengthIn, samplesOut, (int32_t*)state1_);
|
|
outLen = lengthIn / 2;
|
|
return 0;
|
|
case kResamplerMode3To1:
|
|
// We can only handle blocks of 480 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 480) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < (lengthIn / 3))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(496 * sizeof(int32_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 480)
|
|
{
|
|
WebRtcSpl_Resample48khzTo16khz(samplesIn + i, samplesOut + i / 3,
|
|
(WebRtcSpl_State48khzTo16khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = lengthIn / 3;
|
|
free(tmp_mem);
|
|
return 0;
|
|
case kResamplerMode4To1:
|
|
if (maxLen < (lengthIn / 4))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp = (int16_t*)malloc(sizeof(int16_t) * lengthIn / 2);
|
|
// 4:2
|
|
WebRtcSpl_DownsampleBy2(samplesIn, lengthIn, tmp, (int32_t*)state1_);
|
|
// 2:1
|
|
WebRtcSpl_DownsampleBy2(tmp, lengthIn / 2, samplesOut, (int32_t*)state2_);
|
|
outLen = lengthIn / 4;
|
|
free(tmp);
|
|
return 0;
|
|
|
|
case kResamplerMode6To1:
|
|
// We can only handle blocks of 480 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 480) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < (lengthIn / 6))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
tmp_mem = (int32_t*)malloc(496 * sizeof(int32_t));
|
|
tmp = (int16_t*)malloc((sizeof(int16_t) * lengthIn) / 3);
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 480)
|
|
{
|
|
WebRtcSpl_Resample48khzTo16khz(samplesIn + i, tmp + i / 3,
|
|
(WebRtcSpl_State48khzTo16khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = lengthIn / 3;
|
|
free(tmp_mem);
|
|
WebRtcSpl_DownsampleBy2(tmp, outLen, samplesOut, (int32_t*)state2_);
|
|
free(tmp);
|
|
outLen = outLen / 2;
|
|
return 0;
|
|
case kResamplerMode12To1:
|
|
// We can only handle blocks of 480 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 480) != 0) {
|
|
return -1;
|
|
}
|
|
if (maxLen < (lengthIn / 12)) {
|
|
return -1;
|
|
}
|
|
|
|
tmp_mem = (int32_t*) malloc(496 * sizeof(int32_t));
|
|
tmp = (int16_t*) malloc((sizeof(int16_t) * lengthIn) / 3);
|
|
tmp_2 = (int16_t*) malloc((sizeof(int16_t) * lengthIn) / 6);
|
|
// 12:4
|
|
for (size_t i = 0; i < lengthIn; i += 480) {
|
|
// WebRtcSpl_Resample48khzTo16khz() takes a block of 480 samples
|
|
// as input and outputs a resampled block of 160 samples. The
|
|
// data is now actually in 96 kHz sampling rate, despite the
|
|
// function name, and with a resampling factor of 1/3 becomes
|
|
// 32 kHz.
|
|
WebRtcSpl_Resample48khzTo16khz(samplesIn + i, tmp + i / 3,
|
|
(WebRtcSpl_State48khzTo16khz*) state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = lengthIn / 3;
|
|
free(tmp_mem);
|
|
// 4:2
|
|
WebRtcSpl_DownsampleBy2(tmp, outLen, tmp_2, (int32_t*) state2_);
|
|
outLen = outLen / 2;
|
|
free(tmp);
|
|
// 2:1
|
|
WebRtcSpl_DownsampleBy2(tmp_2, outLen, samplesOut,
|
|
(int32_t*) state3_);
|
|
free(tmp_2);
|
|
outLen = outLen / 2;
|
|
return 0;
|
|
case kResamplerMode3To2:
|
|
if (maxLen < (lengthIn * 2 / 3))
|
|
{
|
|
return -1;
|
|
}
|
|
// 3:6
|
|
tmp = static_cast<int16_t*> (malloc(sizeof(int16_t) * lengthIn * 2));
|
|
WebRtcSpl_UpsampleBy2(samplesIn, lengthIn, tmp, (int32_t*)state1_);
|
|
lengthIn *= 2;
|
|
// 6:2
|
|
// We can only handle blocks of 480 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 480) != 0)
|
|
{
|
|
free(tmp);
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(496 * sizeof(int32_t));
|
|
for (size_t i = 0; i < lengthIn; i += 480)
|
|
{
|
|
WebRtcSpl_Resample48khzTo16khz(tmp + i, samplesOut + i / 3,
|
|
(WebRtcSpl_State48khzTo16khz *)state2_,
|
|
tmp_mem);
|
|
}
|
|
outLen = lengthIn / 3;
|
|
free(tmp);
|
|
free(tmp_mem);
|
|
return 0;
|
|
case kResamplerMode11To2:
|
|
// We can only handle blocks of 220 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 220) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 2) / 11))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(126 * sizeof(int32_t));
|
|
tmp = (int16_t*)malloc((lengthIn * 4) / 11 * sizeof(int16_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 220)
|
|
{
|
|
WebRtcSpl_Resample22khzTo8khz(samplesIn + i, tmp + (i * 4) / 11,
|
|
(WebRtcSpl_State22khzTo8khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
lengthIn = (lengthIn * 4) / 11;
|
|
|
|
WebRtcSpl_DownsampleBy2(tmp, lengthIn, samplesOut,
|
|
(int32_t*)state2_);
|
|
outLen = lengthIn / 2;
|
|
|
|
free(tmp_mem);
|
|
free(tmp);
|
|
return 0;
|
|
case kResamplerMode11To4:
|
|
// We can only handle blocks of 220 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 220) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 4) / 11))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(126 * sizeof(int32_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 220)
|
|
{
|
|
WebRtcSpl_Resample22khzTo8khz(samplesIn + i, samplesOut + (i * 4) / 11,
|
|
(WebRtcSpl_State22khzTo8khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = (lengthIn * 4) / 11;
|
|
free(tmp_mem);
|
|
return 0;
|
|
case kResamplerMode11To8:
|
|
// We can only handle blocks of 160 samples
|
|
// Can be fixed, but I don't think it's needed
|
|
if ((lengthIn % 220) != 0)
|
|
{
|
|
return -1;
|
|
}
|
|
if (maxLen < ((lengthIn * 8) / 11))
|
|
{
|
|
return -1;
|
|
}
|
|
tmp_mem = (int32_t*)malloc(104 * sizeof(int32_t));
|
|
|
|
for (size_t i = 0; i < lengthIn; i += 220)
|
|
{
|
|
WebRtcSpl_Resample22khzTo16khz(samplesIn + i, samplesOut + (i * 8) / 11,
|
|
(WebRtcSpl_State22khzTo16khz *)state1_,
|
|
tmp_mem);
|
|
}
|
|
outLen = (lengthIn * 8) / 11;
|
|
free(tmp_mem);
|
|
return 0;
|
|
break;
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
} // namespace webrtc
|