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238 lines
7.2 KiB
C++
238 lines
7.2 KiB
C++
/*
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Copyright (c) 2015, Dimitri Diakopoulos All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "Common.h"
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using namespace nqr;
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NyquistFileBuffer nqr::ReadFile(std::string pathToFile)
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{
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//std::cout << "[Debug] Open: " << pathToFile << std::endl;
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FILE * audioFile = fopen(pathToFile.c_str(), "rb");
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if (!audioFile)
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{
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throw std::runtime_error("file not found");
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}
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fseek(audioFile, 0, SEEK_END);
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size_t lengthInBytes = ftell(audioFile);
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fseek(audioFile, 0, SEEK_SET);
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// Allocate temporary buffer
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std::vector<uint8_t> fileBuffer(lengthInBytes);
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size_t elementsRead = fread(fileBuffer.data(), 1, lengthInBytes, audioFile);
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if (elementsRead == 0 || fileBuffer.size() < 64)
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{
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throw std::runtime_error("error reading file or file too small");
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}
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NyquistFileBuffer data = {std::move(fileBuffer), elementsRead};
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fclose(audioFile);
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// Copy out to user
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return data;
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}
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// Src data is aligned to PCMFormat
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// @todo normalize?
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void nqr::ConvertToFloat32(float * dst, const uint8_t * src, const size_t N, PCMFormat f)
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{
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assert(f != PCM_END);
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if (f == PCM_U8)
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{
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const uint8_t * dataPtr = reinterpret_cast<const uint8_t *>(src);
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for (size_t i = 0; i < N; ++i)
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dst[i] = uint8_to_float32(dataPtr[i]);
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}
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else if (f == PCM_S8)
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{
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const int8_t * dataPtr = reinterpret_cast<const int8_t *>(src);
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for (size_t i = 0; i < N; ++i)
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dst[i] = int8_to_float32(dataPtr[i]);
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}
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else if (f == PCM_16)
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{
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const int16_t * dataPtr = reinterpret_cast<const int16_t *>(src);
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for (size_t i = 0; i < N; ++i)
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dst[i] = int16_to_float32(Read16(dataPtr[i]));
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}
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else if (f == PCM_24)
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{
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const uint8_t * dataPtr = reinterpret_cast<const uint8_t *>(src);
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size_t c = 0;
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for (size_t i = 0; i < N; ++i)
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{
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int32_t sample = Pack(dataPtr[c], dataPtr[c+1], dataPtr[c+2]);
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dst[i] = int24_to_float32(sample); // Packed types don't need addtional endian helpers
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c += 3;
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}
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}
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else if (f == PCM_32)
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{
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const int32_t * dataPtr = reinterpret_cast<const int32_t *>(src);
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for (size_t i = 0; i < N; ++i)
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dst[i] = int32_to_float32(Read32(dataPtr[i]));
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}
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//@todo add int64 format
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else if (f == PCM_FLT)
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{
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const float * dataPtr = reinterpret_cast<const float *>(src);
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for (size_t i = 0; i < N; ++i)
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dst[i] = (float) Read32(dataPtr[i]);
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}
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else if (f == PCM_DBL)
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{
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const double * dataPtr = reinterpret_cast<const double *>(src);
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for (size_t i = 0; i < N; ++i)
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dst[i] = (float) Read64(dataPtr[i]);
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}
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}
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// Src data is always aligned to 4 bytes (WavPack, primarily)
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void nqr::ConvertToFloat32(float * dst, const int32_t * src, const size_t N, PCMFormat f)
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{
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assert(f != PCM_END);
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if (f == PCM_16)
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{
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for (size_t i = 0; i < N; ++i)
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dst[i] = int16_to_float32(Read32(src[i]));
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}
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else if (f == PCM_24)
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{
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const uint8_t * dataPtr = reinterpret_cast<const uint8_t *>(src);
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size_t c = 0;
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for (size_t i = 0; i < N; ++i)
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{
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int32_t sample = Pack(dataPtr[c], dataPtr[c+1], dataPtr[c+2]);
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dst[i] = int24_to_float32(sample);
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c += 4; // +4 for next 4 byte boundary
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}
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}
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else if (f == PCM_32)
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{
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for (size_t i = 0; i < N; ++i)
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dst[i] = int32_to_float32(Read32(src[i]));
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}
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}
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void nqr::ConvertToFloat32(float * dst, const int16_t * src, const size_t N, PCMFormat f)
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{
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assert(f != PCM_END);
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if (f == PCM_16)
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{
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for (size_t i = 0; i < N; ++i)
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dst[i] = int16_to_float32(Read16(src[i]));
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}
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}
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void nqr::ConvertFromFloat32(uint8_t * dst, const float * src, const size_t N, PCMFormat f, DitherType t)
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{
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assert(f != PCM_END);
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Dither dither(t);
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if (f == PCM_U8)
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{
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uint8_t * destPtr = reinterpret_cast<uint8_t *>(dst);
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for (size_t i = 0; i < N; ++i)
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destPtr[i] = (uint8_t) dither(lroundf(float32_to_uint8(src[i])));
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}
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else if (f == PCM_S8)
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{
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int8_t * destPtr = reinterpret_cast<int8_t *>(dst);
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for (size_t i = 0; i < N; ++i)
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destPtr[i] = (int8_t) dither(lroundf(float32_to_int8(src[i])));
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}
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else if (f == PCM_16)
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{
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int16_t * destPtr = reinterpret_cast<int16_t *>(dst);
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for (size_t i = 0; i < N; ++i)
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destPtr[i] =(int16_t) dither(lroundf(float32_to_int16(src[i])));
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}
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else if (f == PCM_24)
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{
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uint8_t * destPtr = reinterpret_cast<uint8_t *>(dst);
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size_t c = 0;
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for (size_t i = 0; i < N; ++i)
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{
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int32_t sample = (int32_t) dither(lroundf(float32_to_int24(src[i])));
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auto unpacked = Unpack(sample); // Handles endian swap
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destPtr[c] = unpacked[0];
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destPtr[c+1] = unpacked[1];
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destPtr[c+2] = unpacked[2];
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c += 3;
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}
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}
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else if (f == PCM_32)
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{
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int32_t * destPtr = reinterpret_cast<int32_t *>(dst);
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for (size_t i = 0; i < N; ++i)
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destPtr[i] = (int32_t) dither(lroundf(float32_to_int32(src[i])));
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}
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}
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int nqr::GetFormatBitsPerSample(PCMFormat f)
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{
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switch(f)
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{
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case PCM_U8:
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case PCM_S8:
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return 8;
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case PCM_16:
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return 16;
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case PCM_24:
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return 24;
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case PCM_32:
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case PCM_FLT:
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return 32;
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case PCM_64:
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case PCM_DBL:
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return 64;
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default:
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return 0;
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}
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}
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PCMFormat nqr::MakeFormatForBits(int bits, bool floatingPt, bool isSigned)
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{
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switch(bits)
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{
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case 8: return (isSigned) ? PCM_S8 : PCM_U8;
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case 16: return PCM_16;
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case 24: return PCM_24;
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case 32: return (floatingPt) ? PCM_FLT : PCM_32;
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case 64: return (floatingPt) ? PCM_DBL : PCM_64;
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default: return PCM_END;
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}
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}
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