common_audio/wav_file.cc - src - Git at Google

 /*
  *  Copyright (c) 2014 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 "common_audio/wav_file.h"

 #include <errno.h>

 #include <algorithm>
 #include <array>
 #include <cstdio>
 #include <type_traits>
 #include <utility>

 #include "common_audio/include/audio_util.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/system/arch.h"

 namespace webrtc {
 namespace {

 static_assert(std::is_trivially_destructible<WavFormat>::value, "");

 // Checks whether the format is supported or not.
 bool FormatSupported(WavFormat format) {
   // Only PCM and IEEE Float formats are supported.
   return format == WavFormat::kWavFormatPcm ||
          format == WavFormat::kWavFormatIeeeFloat;
 }

 // Doesn't take ownership of the file handle and won't close it.
 class WavHeaderFileReader : public WavHeaderReader {
  public:
   explicit WavHeaderFileReader(FileWrapper* file) : file_(file) {}

   WavHeaderFileReader(const WavHeaderFileReader&) = delete;
   WavHeaderFileReader& operator=(const WavHeaderFileReader&) = delete;

   size_t Read(void* buf, size_t num_bytes) override {
     size_t count = file_->Read(buf, num_bytes);
     pos_ += count;
     return count;
   }
   bool SeekForward(uint32_t num_bytes) override {
     bool success = file_->SeekRelative(num_bytes);
     if (success) {
       pos_ += num_bytes;
     }
     return success;
   }
   int64_t GetPosition() override { return pos_; }

  private:
   FileWrapper* file_;
   int64_t pos_ = 0;
 };

 constexpr size_t kMaxChunksize = 4096;

 }  // namespace

 WavReader::WavReader(const std::string& filename)
     : WavReader(FileWrapper::OpenReadOnly(filename)) {}

 WavReader::WavReader(FileWrapper file) : file_(std::move(file)) {
   RTC_CHECK(file_.is_open())
       << "Invalid file. Could not create file handle for wav file.";

   WavHeaderFileReader readable(&file_);
   size_t bytes_per_sample;
   RTC_CHECK(ReadWavHeader(&readable, &num_channels_, &sample_rate_, &format_,
                           &bytes_per_sample, &num_samples_in_file_,
                           &data_start_pos_));
   num_unread_samples_ = num_samples_in_file_;
   RTC_CHECK(FormatSupported(format_)) << "Non-implemented wav-format";
 }

 void WavReader::Reset() {
   RTC_CHECK(file_.SeekTo(data_start_pos_))
       << "Failed to set position in the file to WAV data start position";
   num_unread_samples_ = num_samples_in_file_;
 }

 size_t WavReader::ReadSamples(const size_t num_samples,
                               int16_t* const samples) {
 #ifndef WEBRTC_ARCH_LITTLE_ENDIAN
 #error "Need to convert samples to big-endian when reading from WAV file"
 #endif

   size_t num_samples_left_to_read = num_samples;
   size_t next_chunk_start = 0;
   while (num_samples_left_to_read > 0 && num_unread_samples_ > 0) {
     const size_t chunk_size = std::min(
         std::min(kMaxChunksize, num_samples_left_to_read), num_unread_samples_);
     size_t num_bytes_read;
     size_t num_samples_read;
     if (format_ == WavFormat::kWavFormatIeeeFloat) {
       std::array<float, kMaxChunksize> samples_to_convert;
       num_bytes_read = file_.Read(samples_to_convert.data(),
                                   chunk_size * sizeof(samples_to_convert[0]));
       num_samples_read = num_bytes_read / sizeof(samples_to_convert[0]);

       for (size_t j = 0; j < num_samples_read; ++j) {
         samples[next_chunk_start + j] = FloatToS16(samples_to_convert[j]);
       }
     } else {
       RTC_CHECK_EQ(format_, WavFormat::kWavFormatPcm);
       num_bytes_read = file_.Read(&samples[next_chunk_start],
                                   chunk_size * sizeof(samples[0]));
       num_samples_read = num_bytes_read / sizeof(samples[0]);
     }
     RTC_CHECK(num_samples_read == 0 || (num_bytes_read % num_samples_read) == 0)
         << "Corrupt file: file ended in the middle of a sample.";
     RTC_CHECK(num_samples_read == chunk_size || file_.ReadEof())
         << "Corrupt file: payload size does not match header.";

     next_chunk_start += num_samples_read;
     num_unread_samples_ -= num_samples_read;
     num_samples_left_to_read -= num_samples_read;
   }

   return num_samples - num_samples_left_to_read;
 }

 size_t WavReader::ReadSamples(const size_t num_samples, float* const samples) {
 #ifndef WEBRTC_ARCH_LITTLE_ENDIAN
 #error "Need to convert samples to big-endian when reading from WAV file"
 #endif

   size_t num_samples_left_to_read = num_samples;
   size_t next_chunk_start = 0;
   while (num_samples_left_to_read > 0 && num_unread_samples_ > 0) {
     const size_t chunk_size = std::min(
         std::min(kMaxChunksize, num_samples_left_to_read), num_unread_samples_);
     size_t num_bytes_read;
     size_t num_samples_read;
     if (format_ == WavFormat::kWavFormatPcm) {
       std::array<int16_t, kMaxChunksize> samples_to_convert;
       num_bytes_read = file_.Read(samples_to_convert.data(),
                                   chunk_size * sizeof(samples_to_convert[0]));
       num_samples_read = num_bytes_read / sizeof(samples_to_convert[0]);

       for (size_t j = 0; j < num_samples_read; ++j) {
         samples[next_chunk_start + j] =
             static_cast<float>(samples_to_convert[j]);
       }
     } else {
       RTC_CHECK_EQ(format_, WavFormat::kWavFormatIeeeFloat);
       num_bytes_read = file_.Read(&samples[next_chunk_start],
                                   chunk_size * sizeof(samples[0]));
       num_samples_read = num_bytes_read / sizeof(samples[0]);

       for (size_t j = 0; j < num_samples_read; ++j) {
         samples[next_chunk_start + j] =
             FloatToFloatS16(samples[next_chunk_start + j]);
       }
     }
     RTC_CHECK(num_samples_read == 0 || (num_bytes_read % num_samples_read) == 0)
         << "Corrupt file: file ended in the middle of a sample.";
     RTC_CHECK(num_samples_read == chunk_size || file_.ReadEof())
         << "Corrupt file: payload size does not match header.";

     next_chunk_start += num_samples_read;
     num_unread_samples_ -= num_samples_read;
     num_samples_left_to_read -= num_samples_read;
   }

   return num_samples - num_samples_left_to_read;
 }

 void WavReader::Close() {
   file_.Close();
 }

 WavWriter::WavWriter(const std::string& filename,
                      int sample_rate,
                      size_t num_channels,
                      SampleFormat sample_format)
     // Unlike plain fopen, OpenWriteOnly takes care of filename utf8 ->
     // wchar conversion on windows.
     : WavWriter(FileWrapper::OpenWriteOnly(filename),
                 sample_rate,
                 num_channels,
                 sample_format) {}

 WavWriter::WavWriter(FileWrapper file,
                      int sample_rate,
                      size_t num_channels,
                      SampleFormat sample_format)
     : sample_rate_(sample_rate),
       num_channels_(num_channels),
       num_samples_written_(0),
       format_(sample_format == SampleFormat::kInt16
                   ? WavFormat::kWavFormatPcm
                   : WavFormat::kWavFormatIeeeFloat),
       file_(std::move(file)) {
   // Handle errors from the OpenWriteOnly call in above constructor.
   RTC_CHECK(file_.is_open()) << "Invalid file. Could not create wav file.";

   RTC_CHECK(CheckWavParameters(num_channels_, sample_rate_, format_,
                                num_samples_written_));

   // Write a blank placeholder header, since we need to know the total number
   // of samples before we can fill in the real data.
   static const uint8_t blank_header[MaxWavHeaderSize()] = {0};
   RTC_CHECK(file_.Write(blank_header, WavHeaderSize(format_)));
 }

 void WavWriter::WriteSamples(const int16_t* samples, size_t num_samples) {
 #ifndef WEBRTC_ARCH_LITTLE_ENDIAN
 #error "Need to convert samples to little-endian when writing to WAV file"
 #endif

   for (size_t i = 0; i < num_samples; i += kMaxChunksize) {
     const size_t num_remaining_samples = num_samples - i;
     const size_t num_samples_to_write =
         std::min(kMaxChunksize, num_remaining_samples);

     if (format_ == WavFormat::kWavFormatPcm) {
       RTC_CHECK(
           file_.Write(&samples[i], num_samples_to_write * sizeof(samples[0])));
     } else {
       RTC_CHECK_EQ(format_, WavFormat::kWavFormatIeeeFloat);
       std::array<float, kMaxChunksize> converted_samples;
       for (size_t j = 0; j < num_samples_to_write; ++j) {
         converted_samples[j] = S16ToFloat(samples[i + j]);
       }
       RTC_CHECK(
           file_.Write(converted_samples.data(),
                       num_samples_to_write * sizeof(converted_samples[0])));
     }

     num_samples_written_ += num_samples_to_write;
     RTC_CHECK_GE(num_samples_written_,
                  num_samples_to_write);  // detect size_t overflow
   }
 }

 void WavWriter::WriteSamples(const float* samples, size_t num_samples) {
 #ifndef WEBRTC_ARCH_LITTLE_ENDIAN
 #error "Need to convert samples to little-endian when writing to WAV file"
 #endif

   for (size_t i = 0; i < num_samples; i += kMaxChunksize) {
     const size_t num_remaining_samples = num_samples - i;
     const size_t num_samples_to_write =
         std::min(kMaxChunksize, num_remaining_samples);

     if (format_ == WavFormat::kWavFormatPcm) {
       std::array<int16_t, kMaxChunksize> converted_samples;
       for (size_t j = 0; j < num_samples_to_write; ++j) {
         converted_samples[j] = FloatS16ToS16(samples[i + j]);
       }
       RTC_CHECK(
           file_.Write(converted_samples.data(),
                       num_samples_to_write * sizeof(converted_samples[0])));
     } else {
       RTC_CHECK_EQ(format_, WavFormat::kWavFormatIeeeFloat);
       std::array<float, kMaxChunksize> converted_samples;
       for (size_t j = 0; j < num_samples_to_write; ++j) {
         converted_samples[j] = FloatS16ToFloat(samples[i + j]);
       }
       RTC_CHECK(
           file_.Write(converted_samples.data(),
                       num_samples_to_write * sizeof(converted_samples[0])));
     }

     num_samples_written_ += num_samples_to_write;
     RTC_CHECK(num_samples_written_ >=
               num_samples_to_write);  // detect size_t overflow
   }
 }

 void WavWriter::Close() {
   RTC_CHECK(file_.Rewind());
   std::array<uint8_t, MaxWavHeaderSize()> header;
   size_t header_size;
   WriteWavHeader(num_channels_, sample_rate_, format_, num_samples_written_,
                  header.data(), &header_size);
   RTC_CHECK(file_.Write(header.data(), header_size));
   RTC_CHECK(file_.Close());
 }

 }  // namespace webrtc
	/*
	* Copyright (c) 2014 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 "common_audio/wav_file.h"

	#include <errno.h>

	#include <algorithm>
	#include <array>
	#include <cstdio>
	#include <type_traits>
	#include <utility>

	#include "common_audio/include/audio_util.h"
	#include "rtc_base/checks.h"
	#include "rtc_base/system/arch.h"

	namespace webrtc {
	namespace {

	static_assert(std::is_trivially_destructible<WavFormat>::value, "");

	// Checks whether the format is supported or not.
	bool FormatSupported(WavFormat format) {
	// Only PCM and IEEE Float formats are supported.
	return format == WavFormat::kWavFormatPcm \|\|
	format == WavFormat::kWavFormatIeeeFloat;
	}

	// Doesn't take ownership of the file handle and won't close it.
	class WavHeaderFileReader : public WavHeaderReader {
	public:
	explicit WavHeaderFileReader(FileWrapper* file) : file_(file) {}

	WavHeaderFileReader(const WavHeaderFileReader&) = delete;
	WavHeaderFileReader& operator=(const WavHeaderFileReader&) = delete;

	size_t Read(void* buf, size_t num_bytes) override {
	size_t count = file_->Read(buf, num_bytes);
	pos_ += count;
	return count;
	}
	bool SeekForward(uint32_t num_bytes) override {
	bool success = file_->SeekRelative(num_bytes);
	if (success) {
	pos_ += num_bytes;
	}
	return success;
	}
	int64_t GetPosition() override { return pos_; }

	private:
	FileWrapper* file_;
	int64_t pos_ = 0;
	};

	constexpr size_t kMaxChunksize = 4096;

	} // namespace

	WavReader::WavReader(const std::string& filename)
	: WavReader(FileWrapper::OpenReadOnly(filename)) {}

	WavReader::WavReader(FileWrapper file) : file_(std::move(file)) {
	RTC_CHECK(file_.is_open())
	<< "Invalid file. Could not create file handle for wav file.";

	WavHeaderFileReader readable(&file_);
	size_t bytes_per_sample;
	RTC_CHECK(ReadWavHeader(&readable, &num_channels_, &sample_rate_, &format_,
	&bytes_per_sample, &num_samples_in_file_,
	&data_start_pos_));
	num_unread_samples_ = num_samples_in_file_;
	RTC_CHECK(FormatSupported(format_)) << "Non-implemented wav-format";
	}

	void WavReader::Reset() {
	RTC_CHECK(file_.SeekTo(data_start_pos_))
	<< "Failed to set position in the file to WAV data start position";
	num_unread_samples_ = num_samples_in_file_;
	}

	size_t WavReader::ReadSamples(const size_t num_samples,
	int16_t* const samples) {
	#ifndef WEBRTC_ARCH_LITTLE_ENDIAN
	#error "Need to convert samples to big-endian when reading from WAV file"
	#endif

	size_t num_samples_left_to_read = num_samples;
	size_t next_chunk_start = 0;
	while (num_samples_left_to_read > 0 && num_unread_samples_ > 0) {
	const size_t chunk_size = std::min(
	std::min(kMaxChunksize, num_samples_left_to_read), num_unread_samples_);
	size_t num_bytes_read;
	size_t num_samples_read;
	if (format_ == WavFormat::kWavFormatIeeeFloat) {
	std::array<float, kMaxChunksize> samples_to_convert;
	num_bytes_read = file_.Read(samples_to_convert.data(),
	chunk_size * sizeof(samples_to_convert[0]));
	num_samples_read = num_bytes_read / sizeof(samples_to_convert[0]);

	for (size_t j = 0; j < num_samples_read; ++j) {
	samples[next_chunk_start + j] = FloatToS16(samples_to_convert[j]);
	}
	} else {
	RTC_CHECK_EQ(format_, WavFormat::kWavFormatPcm);
	num_bytes_read = file_.Read(&samples[next_chunk_start],
	chunk_size * sizeof(samples[0]));
	num_samples_read = num_bytes_read / sizeof(samples[0]);
	}
	RTC_CHECK(num_samples_read == 0 \|\| (num_bytes_read % num_samples_read) == 0)
	<< "Corrupt file: file ended in the middle of a sample.";
	RTC_CHECK(num_samples_read == chunk_size \|\| file_.ReadEof())
	<< "Corrupt file: payload size does not match header.";

	next_chunk_start += num_samples_read;
	num_unread_samples_ -= num_samples_read;
	num_samples_left_to_read -= num_samples_read;
	}

	return num_samples - num_samples_left_to_read;
	}

	size_t WavReader::ReadSamples(const size_t num_samples, float* const samples) {
	#ifndef WEBRTC_ARCH_LITTLE_ENDIAN
	#error "Need to convert samples to big-endian when reading from WAV file"
	#endif

	size_t num_samples_left_to_read = num_samples;
	size_t next_chunk_start = 0;
	while (num_samples_left_to_read > 0 && num_unread_samples_ > 0) {
	const size_t chunk_size = std::min(
	std::min(kMaxChunksize, num_samples_left_to_read), num_unread_samples_);
	size_t num_bytes_read;
	size_t num_samples_read;
	if (format_ == WavFormat::kWavFormatPcm) {
	std::array<int16_t, kMaxChunksize> samples_to_convert;
	num_bytes_read = file_.Read(samples_to_convert.data(),
	chunk_size * sizeof(samples_to_convert[0]));
	num_samples_read = num_bytes_read / sizeof(samples_to_convert[0]);

	for (size_t j = 0; j < num_samples_read; ++j) {
	samples[next_chunk_start + j] =
	static_cast<float>(samples_to_convert[j]);
	}
	} else {
	RTC_CHECK_EQ(format_, WavFormat::kWavFormatIeeeFloat);
	num_bytes_read = file_.Read(&samples[next_chunk_start],
	chunk_size * sizeof(samples[0]));
	num_samples_read = num_bytes_read / sizeof(samples[0]);

	for (size_t j = 0; j < num_samples_read; ++j) {
	samples[next_chunk_start + j] =
	FloatToFloatS16(samples[next_chunk_start + j]);
	}
	}
	RTC_CHECK(num_samples_read == 0 \|\| (num_bytes_read % num_samples_read) == 0)
	<< "Corrupt file: file ended in the middle of a sample.";
	RTC_CHECK(num_samples_read == chunk_size \|\| file_.ReadEof())
	<< "Corrupt file: payload size does not match header.";

	next_chunk_start += num_samples_read;
	num_unread_samples_ -= num_samples_read;
	num_samples_left_to_read -= num_samples_read;
	}

	return num_samples - num_samples_left_to_read;
	}

	void WavReader::Close() {
	file_.Close();
	}

	WavWriter::WavWriter(const std::string& filename,
	int sample_rate,
	size_t num_channels,
	SampleFormat sample_format)
	// Unlike plain fopen, OpenWriteOnly takes care of filename utf8 ->
	// wchar conversion on windows.
	: WavWriter(FileWrapper::OpenWriteOnly(filename),
	sample_rate,
	num_channels,
	sample_format) {}

	WavWriter::WavWriter(FileWrapper file,
	int sample_rate,
	size_t num_channels,
	SampleFormat sample_format)
	: sample_rate_(sample_rate),
	num_channels_(num_channels),
	num_samples_written_(0),
	format_(sample_format == SampleFormat::kInt16
	? WavFormat::kWavFormatPcm
	: WavFormat::kWavFormatIeeeFloat),
	file_(std::move(file)) {
	// Handle errors from the OpenWriteOnly call in above constructor.
	RTC_CHECK(file_.is_open()) << "Invalid file. Could not create wav file.";

	RTC_CHECK(CheckWavParameters(num_channels_, sample_rate_, format_,
	num_samples_written_));

	// Write a blank placeholder header, since we need to know the total number
	// of samples before we can fill in the real data.
	static const uint8_t blank_header[MaxWavHeaderSize()] = {0};
	RTC_CHECK(file_.Write(blank_header, WavHeaderSize(format_)));
	}

	void WavWriter::WriteSamples(const int16_t* samples, size_t num_samples) {
	#ifndef WEBRTC_ARCH_LITTLE_ENDIAN
	#error "Need to convert samples to little-endian when writing to WAV file"
	#endif

	for (size_t i = 0; i < num_samples; i += kMaxChunksize) {
	const size_t num_remaining_samples = num_samples - i;
	const size_t num_samples_to_write =
	std::min(kMaxChunksize, num_remaining_samples);

	if (format_ == WavFormat::kWavFormatPcm) {
	RTC_CHECK(
	file_.Write(&samples[i], num_samples_to_write * sizeof(samples[0])));
	} else {
	RTC_CHECK_EQ(format_, WavFormat::kWavFormatIeeeFloat);
	std::array<float, kMaxChunksize> converted_samples;
	for (size_t j = 0; j < num_samples_to_write; ++j) {
	converted_samples[j] = S16ToFloat(samples[i + j]);
	}
	RTC_CHECK(
	file_.Write(converted_samples.data(),
	num_samples_to_write * sizeof(converted_samples[0])));
	}

	num_samples_written_ += num_samples_to_write;
	RTC_CHECK_GE(num_samples_written_,
	num_samples_to_write); // detect size_t overflow
	}
	}

	void WavWriter::WriteSamples(const float* samples, size_t num_samples) {
	#ifndef WEBRTC_ARCH_LITTLE_ENDIAN
	#error "Need to convert samples to little-endian when writing to WAV file"
	#endif

	for (size_t i = 0; i < num_samples; i += kMaxChunksize) {
	const size_t num_remaining_samples = num_samples - i;
	const size_t num_samples_to_write =
	std::min(kMaxChunksize, num_remaining_samples);

	if (format_ == WavFormat::kWavFormatPcm) {
	std::array<int16_t, kMaxChunksize> converted_samples;
	for (size_t j = 0; j < num_samples_to_write; ++j) {
	converted_samples[j] = FloatS16ToS16(samples[i + j]);
	}
	RTC_CHECK(
	file_.Write(converted_samples.data(),
	num_samples_to_write * sizeof(converted_samples[0])));
	} else {
	RTC_CHECK_EQ(format_, WavFormat::kWavFormatIeeeFloat);
	std::array<float, kMaxChunksize> converted_samples;
	for (size_t j = 0; j < num_samples_to_write; ++j) {
	converted_samples[j] = FloatS16ToFloat(samples[i + j]);
	}
	RTC_CHECK(
	file_.Write(converted_samples.data(),
	num_samples_to_write * sizeof(converted_samples[0])));
	}

	num_samples_written_ += num_samples_to_write;
	RTC_CHECK(num_samples_written_ >=
	num_samples_to_write); // detect size_t overflow
	}
	}

	void WavWriter::Close() {
	RTC_CHECK(file_.Rewind());
	std::array<uint8_t, MaxWavHeaderSize()> header;
	size_t header_size;
	WriteWavHeader(num_channels_, sample_rate_, format_, num_samples_written_,
	header.data(), &header_size);
	RTC_CHECK(file_.Write(header.data(), header_size));
	RTC_CHECK(file_.Close());
	}

	} // namespace webrtc