/* * 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 #include "testing/gtest/include/gtest/gtest.h" #include "webrtc/common_audio/wav_header.h" #include "webrtc/system_wrappers/interface/compile_assert.h" // Try various choices of WAV header parameters, and make sure that the good // ones are accepted and the bad ones rejected. TEST(WavHeaderTest, CheckWavParameters) { // Try some really stupid values for one parameter at a time. EXPECT_TRUE(webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 1, 0)); EXPECT_FALSE( webrtc::CheckWavParameters(0, 8000, webrtc::kWavFormatPcm, 1, 0)); EXPECT_FALSE( webrtc::CheckWavParameters(-1, 8000, webrtc::kWavFormatPcm, 1, 0)); EXPECT_FALSE(webrtc::CheckWavParameters(1, 0, webrtc::kWavFormatPcm, 1, 0)); EXPECT_FALSE(webrtc::CheckWavParameters(1, 8000, webrtc::WavFormat(0), 1, 0)); EXPECT_FALSE( webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 0, 0)); // Try invalid format/bytes-per-sample combinations. EXPECT_TRUE(webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 2, 0)); EXPECT_FALSE( webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 4, 0)); EXPECT_FALSE( webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatALaw, 2, 0)); EXPECT_FALSE( webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatMuLaw, 2, 0)); // Too large values. EXPECT_FALSE(webrtc::CheckWavParameters( 1 << 20, 1 << 20, webrtc::kWavFormatPcm, 1, 0)); EXPECT_FALSE(webrtc::CheckWavParameters( 1, 8000, webrtc::kWavFormatPcm, 1, std::numeric_limits::max())); // Not the same number of samples for each channel. EXPECT_FALSE( webrtc::CheckWavParameters(3, 8000, webrtc::kWavFormatPcm, 1, 5)); } TEST(WavHeaderTest, ReadWavHeaderWithErrors) { int num_channels = 0; int sample_rate = 0; webrtc::WavFormat format = webrtc::kWavFormatPcm; int bytes_per_sample = 0; uint32_t num_samples = 0; // Test a few ways the header can be invalid. We start with the valid header // used in WriteAndReadWavHeader, and invalidate one field per test. The // invalid field is indicated in the array name, and in the comments with // *BAD*. static const uint8_t kBadRiffID[] = { 'R', 'i', 'f', 'f', // *BAD* 0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8 'W', 'A', 'V', 'E', 'f', 'm', 't', ' ', 16, 0, 0, 0, // size of fmt block - 8: 24 - 8 6, 0, // format: A-law (6) 17, 0, // channels: 17 0x39, 0x30, 0, 0, // sample rate: 12345 0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345 17, 0, // block align: NumChannels * BytesPerSample 8, 0, // bits per sample: 1 * 8 'd', 'a', 't', 'a', 0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes after header }; EXPECT_FALSE( webrtc::ReadWavHeader(kBadRiffID, &num_channels, &sample_rate, &format, &bytes_per_sample, &num_samples)); static const uint8_t kBadBitsPerSample[] = { 'R', 'I', 'F', 'F', 0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8 'W', 'A', 'V', 'E', 'f', 'm', 't', ' ', 16, 0, 0, 0, // size of fmt block - 8: 24 - 8 6, 0, // format: A-law (6) 17, 0, // channels: 17 0x39, 0x30, 0, 0, // sample rate: 12345 0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345 17, 0, // block align: NumChannels * BytesPerSample 1, 0, // bits per sample: *BAD* 'd', 'a', 't', 'a', 0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes after header }; EXPECT_FALSE( webrtc::ReadWavHeader(kBadBitsPerSample, &num_channels, &sample_rate, &format, &bytes_per_sample, &num_samples)); static const uint8_t kBadByteRate[] = { 'R', 'I', 'F', 'F', 0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8 'W', 'A', 'V', 'E', 'f', 'm', 't', ' ', 16, 0, 0, 0, // size of fmt block - 8: 24 - 8 6, 0, // format: A-law (6) 17, 0, // channels: 17 0x39, 0x30, 0, 0, // sample rate: 12345 0x00, 0x33, 0x03, 0, // byte rate: *BAD* 17, 0, // block align: NumChannels * BytesPerSample 8, 0, // bits per sample: 1 * 8 'd', 'a', 't', 'a', 0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes after header }; EXPECT_FALSE( webrtc::ReadWavHeader(kBadByteRate, &num_channels, &sample_rate, &format, &bytes_per_sample, &num_samples)); } // Try writing and reading a valid WAV header and make sure it looks OK. TEST(WavHeaderTest, WriteAndReadWavHeader) { static const int kSize = 4 + webrtc::kWavHeaderSize + 4; uint8_t buf[kSize]; memset(buf, 0xa4, sizeof(buf)); webrtc::WriteWavHeader( buf + 4, 17, 12345, webrtc::kWavFormatALaw, 1, 123457689); static const uint8_t kExpectedBuf[] = { 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes before header 'R', 'I', 'F', 'F', 0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8 'W', 'A', 'V', 'E', 'f', 'm', 't', ' ', 16, 0, 0, 0, // size of fmt block - 8: 24 - 8 6, 0, // format: A-law (6) 17, 0, // channels: 17 0x39, 0x30, 0, 0, // sample rate: 12345 0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345 17, 0, // block align: NumChannels * BytesPerSample 8, 0, // bits per sample: 1 * 8 'd', 'a', 't', 'a', 0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes after header }; COMPILE_ASSERT(sizeof(kExpectedBuf) == kSize, buf_size); EXPECT_EQ(0, memcmp(kExpectedBuf, buf, kSize)); int num_channels = 0; int sample_rate = 0; webrtc::WavFormat format = webrtc::kWavFormatPcm; int bytes_per_sample = 0; uint32_t num_samples = 0; EXPECT_TRUE( webrtc::ReadWavHeader(buf + 4, &num_channels, &sample_rate, &format, &bytes_per_sample, &num_samples)); EXPECT_EQ(17, num_channels); EXPECT_EQ(12345, sample_rate); EXPECT_EQ(webrtc::kWavFormatALaw, format); EXPECT_EQ(1, bytes_per_sample); EXPECT_EQ(123457689u, num_samples); }