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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/audio_processing/transient/file_utils.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/system_wrappers/include/file_wrapper.h"
#include "webrtc/typedefs.h"
namespace webrtc {
int ConvertByteArrayToFloat(const uint8_t bytes[4], float* out) {
if (!bytes || !out) {
return -1;
}
uint32_t binary_value = 0;
for (int i = 3; i >= 0; --i) {
binary_value <<= 8;
binary_value += bytes[i];
}
*out = bit_cast<float>(binary_value);
return 0;
}
int ConvertByteArrayToDouble(const uint8_t bytes[8], double* out) {
if (!bytes || !out) {
return -1;
}
uint64_t binary_value = 0;
for (int i = 7; i >= 0; --i) {
binary_value <<= 8;
binary_value += bytes[i];
}
*out = bit_cast<double>(binary_value);
return 0;
}
int ConvertFloatToByteArray(float value, uint8_t out_bytes[4]) {
if (!out_bytes) {
return -1;
}
uint32_t binary_value = bit_cast<uint32_t>(value);
for (size_t i = 0; i < 4; ++i) {
out_bytes[i] = binary_value;
binary_value >>= 8;
}
return 0;
}
int ConvertDoubleToByteArray(double value, uint8_t out_bytes[8]) {
if (!out_bytes) {
return -1;
}
uint64_t binary_value = bit_cast<uint64_t>(value);
for (size_t i = 0; i < 8; ++i) {
out_bytes[i] = binary_value;
binary_value >>= 8;
}
return 0;
}
size_t ReadInt16BufferFromFile(FileWrapper* file,
size_t length,
int16_t* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<uint8_t[]> byte_array(new uint8_t[2]);
size_t int16s_read = 0;
while (int16s_read < length) {
size_t bytes_read = file->Read(byte_array.get(), 2);
if (bytes_read < 2) {
break;
}
int16_t value = byte_array[1];
value <<= 8;
value += byte_array[0];
buffer[int16s_read] = value;
++int16s_read;
}
return int16s_read;
}
size_t ReadInt16FromFileToFloatBuffer(FileWrapper* file,
size_t length,
float* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<int16_t[]> buffer16(new int16_t[length]);
size_t int16s_read = ReadInt16BufferFromFile(file, length, buffer16.get());
for (size_t i = 0; i < int16s_read; ++i) {
buffer[i] = buffer16[i];
}
return int16s_read;
}
size_t ReadInt16FromFileToDoubleBuffer(FileWrapper* file,
size_t length,
double* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<int16_t[]> buffer16(new int16_t[length]);
size_t int16s_read = ReadInt16BufferFromFile(file, length, buffer16.get());
for (size_t i = 0; i < int16s_read; ++i) {
buffer[i] = buffer16[i];
}
return int16s_read;
}
size_t ReadFloatBufferFromFile(FileWrapper* file,
size_t length,
float* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<uint8_t[]> byte_array(new uint8_t[4]);
size_t floats_read = 0;
while (floats_read < length) {
size_t bytes_read = file->Read(byte_array.get(), 4);
if (bytes_read < 4) {
break;
}
ConvertByteArrayToFloat(byte_array.get(), &buffer[floats_read]);
++floats_read;
}
return floats_read;
}
size_t ReadDoubleBufferFromFile(FileWrapper* file,
size_t length,
double* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<uint8_t[]> byte_array(new uint8_t[8]);
size_t doubles_read = 0;
while (doubles_read < length) {
size_t bytes_read = file->Read(byte_array.get(), 8);
if (bytes_read < 8) {
break;
}
ConvertByteArrayToDouble(byte_array.get(), &buffer[doubles_read]);
++doubles_read;
}
return doubles_read;
}
size_t WriteInt16BufferToFile(FileWrapper* file,
size_t length,
const int16_t* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<uint8_t[]> byte_array(new uint8_t[2]);
size_t int16s_written = 0;
for (int16s_written = 0; int16s_written < length; ++int16s_written) {
// Get byte representation.
byte_array[0] = buffer[int16s_written] & 0xFF;
byte_array[1] = (buffer[int16s_written] >> 8) & 0xFF;
file->Write(byte_array.get(), 2);
}
file->Flush();
return int16s_written;
}
size_t WriteFloatBufferToFile(FileWrapper* file,
size_t length,
const float* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<uint8_t[]> byte_array(new uint8_t[4]);
size_t floats_written = 0;
for (floats_written = 0; floats_written < length; ++floats_written) {
// Get byte representation.
ConvertFloatToByteArray(buffer[floats_written], byte_array.get());
file->Write(byte_array.get(), 4);
}
file->Flush();
return floats_written;
}
size_t WriteDoubleBufferToFile(FileWrapper* file,
size_t length,
const double* buffer) {
if (!file || !file->Open() || !buffer || length <= 0) {
return 0;
}
rtc::scoped_ptr<uint8_t[]> byte_array(new uint8_t[8]);
size_t doubles_written = 0;
for (doubles_written = 0; doubles_written < length; ++doubles_written) {
// Get byte representation.
ConvertDoubleToByteArray(buffer[doubles_written], byte_array.get());
file->Write(byte_array.get(), 8);
}
file->Flush();
return doubles_written;
}
} // namespace webrtc
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