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