324 lines
12 KiB
C++
324 lines
12 KiB
C++
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/*
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* Copyright (c) 2014 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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#include <limits>
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#include "testing/gtest/include/gtest/gtest.h"
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#include "webrtc/common_audio/wav_header.h"
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namespace webrtc {
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// Doesn't take ownership of the buffer.
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class ReadableWavBuffer : public ReadableWav {
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public:
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ReadableWavBuffer(const uint8_t* buf, size_t size)
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: buf_(buf),
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size_(size),
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pos_(0),
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buf_exhausted_(false),
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check_read_size_(true) {}
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ReadableWavBuffer(const uint8_t* buf, size_t size, bool check_read_size)
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: buf_(buf),
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size_(size),
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pos_(0),
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buf_exhausted_(false),
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check_read_size_(check_read_size) {}
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virtual ~ReadableWavBuffer() {
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// Verify the entire buffer has been read.
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if (check_read_size_)
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EXPECT_EQ(size_, pos_);
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}
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virtual size_t Read(void* buf, size_t num_bytes) {
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// Verify we don't try to read outside of a properly sized header.
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if (size_ >= kWavHeaderSize)
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EXPECT_GE(size_, pos_ + num_bytes);
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EXPECT_FALSE(buf_exhausted_);
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const size_t bytes_remaining = size_ - pos_;
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if (num_bytes > bytes_remaining) {
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// The caller is signalled about an exhausted buffer when we return fewer
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// bytes than requested. There should not be another read attempt after
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// this point.
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buf_exhausted_ = true;
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num_bytes = bytes_remaining;
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}
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memcpy(buf, &buf_[pos_], num_bytes);
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pos_ += num_bytes;
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return num_bytes;
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}
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private:
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const uint8_t* buf_;
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const size_t size_;
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size_t pos_;
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bool buf_exhausted_;
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const bool check_read_size_;
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};
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// Try various choices of WAV header parameters, and make sure that the good
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// ones are accepted and the bad ones rejected.
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TEST(WavHeaderTest, CheckWavParameters) {
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// Try some really stupid values for one parameter at a time.
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EXPECT_TRUE(CheckWavParameters(1, 8000, kWavFormatPcm, 1, 0));
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EXPECT_FALSE(CheckWavParameters(0, 8000, kWavFormatPcm, 1, 0));
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EXPECT_FALSE(CheckWavParameters(0x10000, 8000, kWavFormatPcm, 1, 0));
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EXPECT_FALSE(CheckWavParameters(1, 0, kWavFormatPcm, 1, 0));
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EXPECT_FALSE(CheckWavParameters(1, 8000, WavFormat(0), 1, 0));
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EXPECT_FALSE(CheckWavParameters(1, 8000, kWavFormatPcm, 0, 0));
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// Try invalid format/bytes-per-sample combinations.
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EXPECT_TRUE(CheckWavParameters(1, 8000, kWavFormatPcm, 2, 0));
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EXPECT_FALSE(CheckWavParameters(1, 8000, kWavFormatPcm, 4, 0));
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EXPECT_FALSE(CheckWavParameters(1, 8000, kWavFormatALaw, 2, 0));
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EXPECT_FALSE(CheckWavParameters(1, 8000, kWavFormatMuLaw, 2, 0));
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// Too large values.
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EXPECT_FALSE(CheckWavParameters(1 << 20, 1 << 20, kWavFormatPcm, 1, 0));
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EXPECT_FALSE(CheckWavParameters(
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1, 8000, kWavFormatPcm, 1, std::numeric_limits<uint32_t>::max()));
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// Not the same number of samples for each channel.
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EXPECT_FALSE(CheckWavParameters(3, 8000, kWavFormatPcm, 1, 5));
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}
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TEST(WavHeaderTest, ReadWavHeaderWithErrors) {
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size_t num_channels = 0;
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int sample_rate = 0;
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WavFormat format = kWavFormatPcm;
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size_t bytes_per_sample = 0;
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size_t num_samples = 0;
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// Test a few ways the header can be invalid. We start with the valid header
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// used in WriteAndReadWavHeader, and invalidate one field per test. The
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// invalid field is indicated in the array name, and in the comments with
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// *BAD*.
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{
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static const uint8_t kBadRiffID[] = {
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'R', 'i', 'f', 'f', // *BAD*
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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16, 0, 0, 0, // size of fmt block - 8: 24 - 8
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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};
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ReadableWavBuffer r(kBadRiffID, sizeof(kBadRiffID));
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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{
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static const uint8_t kBadBitsPerSample[] = {
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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16, 0, 0, 0, // size of fmt block - 8: 24 - 8
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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1, 0, // bits per sample: *BAD*
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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};
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ReadableWavBuffer r(kBadBitsPerSample, sizeof(kBadBitsPerSample));
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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{
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static const uint8_t kBadByteRate[] = {
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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16, 0, 0, 0, // size of fmt block - 8: 24 - 8
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0x00, 0x33, 0x03, 0, // byte rate: *BAD*
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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};
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ReadableWavBuffer r(kBadByteRate, sizeof(kBadByteRate));
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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{
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static const uint8_t kBadFmtHeaderSize[] = {
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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17, 0, 0, 0, // size of fmt block *BAD*. Only 16 and 18 permitted.
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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0, // extra (though invalid) header byte
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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};
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ReadableWavBuffer r(kBadFmtHeaderSize, sizeof(kBadFmtHeaderSize), false);
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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{
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static const uint8_t kNonZeroExtensionField[] = {
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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18, 0, 0, 0, // size of fmt block - 8: 24 - 8
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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1, 0, // non-zero extension field *BAD*
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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};
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ReadableWavBuffer r(kNonZeroExtensionField, sizeof(kNonZeroExtensionField),
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false);
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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{
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static const uint8_t kMissingDataChunk[] = {
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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16, 0, 0, 0, // size of fmt block - 8: 24 - 8
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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};
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ReadableWavBuffer r(kMissingDataChunk, sizeof(kMissingDataChunk));
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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{
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static const uint8_t kMissingFmtAndDataChunks[] = {
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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};
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ReadableWavBuffer r(kMissingFmtAndDataChunks,
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sizeof(kMissingFmtAndDataChunks));
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EXPECT_FALSE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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}
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}
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// Try writing and reading a valid WAV header and make sure it looks OK.
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TEST(WavHeaderTest, WriteAndReadWavHeader) {
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static const int kSize = 4 + kWavHeaderSize + 4;
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uint8_t buf[kSize];
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memset(buf, 0xa4, sizeof(buf));
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WriteWavHeader(buf + 4, 17, 12345, kWavFormatALaw, 1, 123457689);
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static const uint8_t kExpectedBuf[] = {
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0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes before header
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'R', 'I', 'F', 'F',
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0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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16, 0, 0, 0, // size of fmt block - 8: 24 - 8
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes after header
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};
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static_assert(sizeof(kExpectedBuf) == kSize, "buffer size");
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EXPECT_EQ(0, memcmp(kExpectedBuf, buf, kSize));
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size_t num_channels = 0;
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int sample_rate = 0;
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WavFormat format = kWavFormatPcm;
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size_t bytes_per_sample = 0;
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size_t num_samples = 0;
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ReadableWavBuffer r(buf + 4, sizeof(buf) - 8);
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EXPECT_TRUE(
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ReadWavHeader(&r, &num_channels, &sample_rate, &format,
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&bytes_per_sample, &num_samples));
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EXPECT_EQ(17u, num_channels);
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EXPECT_EQ(12345, sample_rate);
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EXPECT_EQ(kWavFormatALaw, format);
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EXPECT_EQ(1u, bytes_per_sample);
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EXPECT_EQ(123457689u, num_samples);
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}
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// Try reading an atypical but valid WAV header and make sure it's parsed OK.
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TEST(WavHeaderTest, ReadAtypicalWavHeader) {
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static const uint8_t kBuf[] = {
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'R', 'I', 'F', 'F',
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0x3d, 0xd1, 0x5b, 0x07, // size of whole file - 8 + an extra 128 bytes of
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// "metadata": 123457689 + 44 - 8 + 128. (atypical)
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'W', 'A', 'V', 'E',
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'f', 'm', 't', ' ',
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18, 0, 0, 0, // size of fmt block (with an atypical extension size field)
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6, 0, // format: A-law (6)
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17, 0, // channels: 17
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0x39, 0x30, 0, 0, // sample rate: 12345
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0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345
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17, 0, // block align: NumChannels * BytesPerSample
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8, 0, // bits per sample: 1 * 8
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0, 0, // zero extension size field (atypical)
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'd', 'a', 't', 'a',
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0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689
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};
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size_t num_channels = 0;
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int sample_rate = 0;
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WavFormat format = kWavFormatPcm;
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size_t bytes_per_sample = 0;
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size_t num_samples = 0;
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|
ReadableWavBuffer r(kBuf, sizeof(kBuf));
|
||
|
|
EXPECT_TRUE(
|
||
|
|
ReadWavHeader(&r, &num_channels, &sample_rate, &format,
|
||
|
|
&bytes_per_sample, &num_samples));
|
||
|
|
EXPECT_EQ(17u, num_channels);
|
||
|
|
EXPECT_EQ(12345, sample_rate);
|
||
|
|
EXPECT_EQ(kWavFormatALaw, format);
|
||
|
|
EXPECT_EQ(1u, bytes_per_sample);
|
||
|
|
EXPECT_EQ(123457689u, num_samples);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace webrtc
|