1/* 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include <limits> 12 13#include "testing/gtest/include/gtest/gtest.h" 14#include "webrtc/common_audio/wav_header.h" 15#include "webrtc/system_wrappers/interface/compile_assert.h" 16 17// Try various choices of WAV header parameters, and make sure that the good 18// ones are accepted and the bad ones rejected. 19TEST(WavHeaderTest, CheckWavParameters) { 20 // Try some really stupid values for one parameter at a time. 21 EXPECT_TRUE(webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 1, 0)); 22 EXPECT_FALSE( 23 webrtc::CheckWavParameters(0, 8000, webrtc::kWavFormatPcm, 1, 0)); 24 EXPECT_FALSE( 25 webrtc::CheckWavParameters(-1, 8000, webrtc::kWavFormatPcm, 1, 0)); 26 EXPECT_FALSE(webrtc::CheckWavParameters(1, 0, webrtc::kWavFormatPcm, 1, 0)); 27 EXPECT_FALSE(webrtc::CheckWavParameters(1, 8000, webrtc::WavFormat(0), 1, 0)); 28 EXPECT_FALSE( 29 webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 0, 0)); 30 31 // Try invalid format/bytes-per-sample combinations. 32 EXPECT_TRUE(webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 2, 0)); 33 EXPECT_FALSE( 34 webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatPcm, 4, 0)); 35 EXPECT_FALSE( 36 webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatALaw, 2, 0)); 37 EXPECT_FALSE( 38 webrtc::CheckWavParameters(1, 8000, webrtc::kWavFormatMuLaw, 2, 0)); 39 40 // Too large values. 41 EXPECT_FALSE(webrtc::CheckWavParameters( 42 1 << 20, 1 << 20, webrtc::kWavFormatPcm, 1, 0)); 43 EXPECT_FALSE(webrtc::CheckWavParameters( 44 1, 8000, webrtc::kWavFormatPcm, 1, std::numeric_limits<uint32_t>::max())); 45 46 // Not the same number of samples for each channel. 47 EXPECT_FALSE( 48 webrtc::CheckWavParameters(3, 8000, webrtc::kWavFormatPcm, 1, 5)); 49} 50 51// Try writing a WAV header and make sure it looks OK. 52TEST(WavHeaderTest, WriteWavHeader) { 53 static const int kSize = 4 + webrtc::kWavHeaderSize + 4; 54 uint8_t buf[kSize]; 55 memset(buf, 0xa4, sizeof(buf)); 56 webrtc::WriteWavHeader( 57 buf + 4, 17, 12345, webrtc::kWavFormatALaw, 1, 123457689); 58 static const uint8_t kExpectedBuf[] = { 59 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes before header 60 'R', 'I', 'F', 'F', 61 0xbd, 0xd0, 0x5b, 0x07, // size of whole file - 8: 123457689 + 44 - 8 62 'W', 'A', 'V', 'E', 63 'f', 'm', 't', ' ', 64 16, 0, 0, 0, // size of fmt block - 8: 24 - 8 65 6, 0, // format: A-law (6) 66 17, 0, // channels: 17 67 0x39, 0x30, 0, 0, // sample rate: 12345 68 0xc9, 0x33, 0x03, 0, // byte rate: 1 * 17 * 12345 69 17, 0, // block align: NumChannels * BytesPerSample 70 8, 0, // bits per sample: 1 * 8 71 'd', 'a', 't', 'a', 72 0x99, 0xd0, 0x5b, 0x07, // size of payload: 123457689 73 0xa4, 0xa4, 0xa4, 0xa4, // untouched bytes after header 74 }; 75 COMPILE_ASSERT(sizeof(kExpectedBuf) == kSize, buf_size); 76 EXPECT_EQ(0, memcmp(kExpectedBuf, buf, kSize)); 77} 78