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/*
* 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 <limits>
#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<uint32_t>::max()));
// Not the same number of samples for each channel.
EXPECT_FALSE(
webrtc::CheckWavParameters(3, 8000, webrtc::kWavFormatPcm, 1, 5));
}
// Try writing a WAV header and make sure it looks OK.
TEST(WavHeaderTest, WriteWavHeader) {
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));
}
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