gecko-dev/dom/media/gtest/TestMP3Demuxer.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <gtest/gtest.h>
#include <vector>
#include "MP3Demuxer.h"
#include "mozilla/ArrayUtils.h"
#include "MockMediaResource.h"
using namespace mozilla;
using namespace mozilla::mp3;
// Regular MP3 file mock resource.
class MockMP3MediaResource : public MockMediaResource {
public:
explicit MockMP3MediaResource(const char* aFileName)
: MockMediaResource(aFileName)
{}
protected:
virtual ~MockMP3MediaResource() {}
};
// MP3 stream mock resource.
class MockMP3StreamMediaResource : public MockMP3MediaResource {
public:
explicit MockMP3StreamMediaResource(const char* aFileName)
: MockMP3MediaResource(aFileName)
{}
int64_t GetLength() override { return -1; }
protected:
virtual ~MockMP3StreamMediaResource() {}
};
struct MP3Resource {
const char* mFilePath;
bool mIsVBR;
int64_t mFileSize;
int32_t mMPEGLayer;
int32_t mMPEGVersion;
uint8_t mID3MajorVersion;
uint8_t mID3MinorVersion;
uint8_t mID3Flags;
uint32_t mID3Size;
int64_t mDuration;
float mDurationError;
float mSeekError;
int32_t mSampleRate;
int32_t mSamplesPerFrame;
uint32_t mNumSamples;
// TODO: temp solution, we could parse them instead or account for them
// otherwise.
int32_t mNumTrailingFrames;
int32_t mBitrate;
int32_t mSlotSize;
int32_t mPrivate;
// The first n frame offsets.
std::vector<int32_t> mSyncOffsets;
nsRefPtr<MockMP3MediaResource> mResource;
nsRefPtr<MP3TrackDemuxer> mDemuxer;
};
class MP3DemuxerTest : public ::testing::Test {
protected:
void SetUp() override {
{
MP3Resource res;
res.mFilePath = "noise.mp3";
res.mIsVBR = false;
res.mFileSize = 965257;
res.mMPEGLayer = 3;
res.mMPEGVersion = 1;
res.mID3MajorVersion = 3;
res.mID3MinorVersion = 0;
res.mID3Flags = 0;
res.mID3Size = 2141;
res.mDuration = 30067000;
res.mDurationError = 0.001f;
res.mSeekError = 0.02f;
res.mSampleRate = 44100;
res.mSamplesPerFrame = 1152;
res.mNumSamples = 1325952;
res.mNumTrailingFrames = 2;
res.mBitrate = 256000;
res.mSlotSize = 1;
res.mPrivate = 0;
const int syncs[] = { 2151, 2987, 3823, 4659, 5495, 6331 };
res.mSyncOffsets.insert(res.mSyncOffsets.begin(), syncs, syncs + 6);
// No content length can be estimated for CBR stream resources.
MP3Resource streamRes = res;
streamRes.mFileSize = -1;
streamRes.mDuration = -1;
streamRes.mDurationError = 0.0f;
res.mResource = new MockMP3MediaResource(res.mFilePath);
res.mDemuxer = new MP3TrackDemuxer(res.mResource);
mTargets.push_back(res);
streamRes.mResource = new MockMP3StreamMediaResource(streamRes.mFilePath);
streamRes.mDemuxer = new MP3TrackDemuxer(streamRes.mResource);
mTargets.push_back(streamRes);
}
{
MP3Resource res;
// This file trips up the MP3 demuxer if ID3v2 tags aren't properly skipped. If skipping is
// not properly implemented, depending on the strictness of the MPEG frame parser a false
// sync will be detected somewhere within the metadata at or after 112087, or failing
// that, at the artificially added extraneous header at 114532.
res.mFilePath = "id3v2header.mp3";
res.mIsVBR = false;
res.mFileSize = 191302;
res.mMPEGLayer = 3;
res.mMPEGVersion = 1;
res.mID3MajorVersion = 3;
res.mID3MinorVersion = 0;
res.mID3Flags = 0;
res.mID3Size = 115304;
res.mDuration = 3160816;
res.mDurationError = 0.001f;
res.mSeekError = 0.02f;
res.mSampleRate = 44100;
res.mSamplesPerFrame = 1152;
res.mNumSamples = 139392;
res.mNumTrailingFrames = 0;
res.mBitrate = 192000;
res.mSlotSize = 1;
res.mPrivate = 1;
const int syncs[] = { 115314, 115941, 116568, 117195, 117822, 118449 };
res.mSyncOffsets.insert(res.mSyncOffsets.begin(), syncs, syncs + 6);
// No content length can be estimated for CBR stream resources.
MP3Resource streamRes = res;
streamRes.mFileSize = -1;
streamRes.mDuration = -1;
streamRes.mDurationError = 0.0f;
res.mResource = new MockMP3MediaResource(res.mFilePath);
res.mDemuxer = new MP3TrackDemuxer(res.mResource);
mTargets.push_back(res);
streamRes.mResource = new MockMP3StreamMediaResource(streamRes.mFilePath);
streamRes.mDemuxer = new MP3TrackDemuxer(streamRes.mResource);
mTargets.push_back(streamRes);
}
{
MP3Resource res;
res.mFilePath = "noise_vbr.mp3";
res.mIsVBR = true;
res.mFileSize = 583679;
res.mMPEGLayer = 3;
res.mMPEGVersion = 1;
res.mID3MajorVersion = 3;
res.mID3MinorVersion = 0;
res.mID3Flags = 0;
res.mID3Size = 2221;
res.mDuration = 30081000;
res.mDurationError = 0.005f;
res.mSeekError = 0.02f;
res.mSampleRate = 44100;
res.mSamplesPerFrame = 1152;
res.mNumSamples = 1326575;
res.mNumTrailingFrames = 3;
res.mBitrate = 154000;
res.mSlotSize = 1;
res.mPrivate = 0;
const int syncs[] = { 2231, 2648, 2752, 3796, 4318, 4735 };
res.mSyncOffsets.insert(res.mSyncOffsets.begin(), syncs, syncs + 6);
// VBR stream resources contain header info on total frames numbers, which
// is used to estimate the total duration.
MP3Resource streamRes = res;
streamRes.mFileSize = -1;
res.mResource = new MockMP3MediaResource(res.mFilePath);
res.mDemuxer = new MP3TrackDemuxer(res.mResource);
mTargets.push_back(res);
streamRes.mResource = new MockMP3StreamMediaResource(streamRes.mFilePath);
streamRes.mDemuxer = new MP3TrackDemuxer(streamRes.mResource);
mTargets.push_back(streamRes);
}
for (auto& target: mTargets) {
ASSERT_EQ(NS_OK, target.mResource->Open(nullptr));
ASSERT_TRUE(target.mDemuxer->Init());
}
}
std::vector<MP3Resource> mTargets;
};
TEST_F(MP3DemuxerTest, ID3Tags) {
for (const auto& target: mTargets) {
nsRefPtr<MediaRawData> frame(target.mDemuxer->DemuxSample());
ASSERT_TRUE(frame);
const auto& id3 = target.mDemuxer->ID3Header();
ASSERT_TRUE(id3.IsValid());
EXPECT_EQ(target.mID3MajorVersion, id3.MajorVersion());
EXPECT_EQ(target.mID3MinorVersion, id3.MinorVersion());
EXPECT_EQ(target.mID3Flags, id3.Flags());
EXPECT_EQ(target.mID3Size, id3.Size());
}
}
TEST_F(MP3DemuxerTest, VBRHeader) {
for (const auto& target: mTargets) {
nsRefPtr<MediaRawData> frame(target.mDemuxer->DemuxSample());
ASSERT_TRUE(frame);
const auto& vbr = target.mDemuxer->VBRInfo();
if (target.mIsVBR) {
EXPECT_EQ(FrameParser::VBRHeader::XING, vbr.Type());
// TODO: find reference number which accounts for trailing headers.
// EXPECT_EQ(target.mNumSamples / target.mSamplesPerFrame, vbr.NumFrames());
} else {
EXPECT_EQ(FrameParser::VBRHeader::NONE, vbr.Type());
EXPECT_EQ(-1, vbr.NumFrames());
}
}
}
TEST_F(MP3DemuxerTest, FrameParsing) {
for (const auto& target: mTargets) {
nsRefPtr<MediaRawData> frameData(target.mDemuxer->DemuxSample());
ASSERT_TRUE(frameData);
EXPECT_EQ(target.mFileSize, target.mDemuxer->StreamLength());
const auto& id3 = target.mDemuxer->ID3Header();
ASSERT_TRUE(id3.IsValid());
int64_t parsedLength = id3.Size();
int64_t bitrateSum = 0;
int32_t numFrames = 0;
int32_t numSamples = 0;
while (frameData) {
if (static_cast<int64_t>(target.mSyncOffsets.size()) > numFrames) {
// Test sync offsets.
EXPECT_EQ(target.mSyncOffsets[numFrames], frameData->mOffset);
}
++numFrames;
parsedLength += frameData->Size();
const auto& frame = target.mDemuxer->LastFrame();
const auto& header = frame.Header();
ASSERT_TRUE(header.IsValid());
numSamples += header.SamplesPerFrame();
EXPECT_EQ(target.mMPEGLayer, header.Layer());
EXPECT_EQ(target.mSampleRate, header.SampleRate());
EXPECT_EQ(target.mSamplesPerFrame, header.SamplesPerFrame());
EXPECT_EQ(target.mSlotSize, header.SlotSize());
EXPECT_EQ(target.mPrivate, header.Private());
if (target.mIsVBR) {
// Used to compute the average bitrate for VBR streams.
bitrateSum += target.mBitrate;
} else {
EXPECT_EQ(target.mBitrate, header.Bitrate());
}
frameData = target.mDemuxer->DemuxSample();
}
// TODO: find reference number which accounts for trailing headers.
// EXPECT_EQ(target.mNumSamples / target.mSamplesPerFrame, numFrames);
// EXPECT_EQ(target.mNumSamples, numSamples);
// There may be trailing headers which we don't parse, so the stream length
// is the upper bound.
if (target.mFileSize > 0) {
EXPECT_GE(target.mFileSize, parsedLength);
}
if (target.mIsVBR) {
ASSERT_TRUE(numFrames);
EXPECT_EQ(target.mBitrate, static_cast<int32_t>(bitrateSum / numFrames));
}
}
}
TEST_F(MP3DemuxerTest, Duration) {
for (const auto& target: mTargets) {
nsRefPtr<MediaRawData> frameData(target.mDemuxer->DemuxSample());
ASSERT_TRUE(frameData);
EXPECT_EQ(target.mFileSize, target.mDemuxer->StreamLength());
while (frameData) {
EXPECT_NEAR(target.mDuration, target.mDemuxer->Duration().ToMicroseconds(),
target.mDurationError * target.mDuration);
frameData = target.mDemuxer->DemuxSample();
}
}
}
TEST_F(MP3DemuxerTest, Seek) {
using media::TimeUnit;
for (const auto& target: mTargets) {
nsRefPtr<MediaRawData> frameData(target.mDemuxer->DemuxSample());
ASSERT_TRUE(frameData);
const int64_t seekTime = TimeUnit::FromSeconds(1).ToMicroseconds();
int64_t pos = target.mDemuxer->SeekPosition().ToMicroseconds();
while (frameData) {
EXPECT_NEAR(pos, target.mDemuxer->SeekPosition().ToMicroseconds(),
target.mSeekError * pos);
pos += seekTime;
target.mDemuxer->Seek(TimeUnit::FromMicroseconds(pos));
frameData = target.mDemuxer->DemuxSample();
}
}
// Seeking should work with in-between resets, too.
for (const auto& target: mTargets) {
target.mDemuxer->Reset();
nsRefPtr<MediaRawData> frameData(target.mDemuxer->DemuxSample());
ASSERT_TRUE(frameData);
const int64_t seekTime = TimeUnit::FromSeconds(1).ToMicroseconds();
int64_t pos = target.mDemuxer->SeekPosition().ToMicroseconds();
while (frameData) {
EXPECT_NEAR(pos, target.mDemuxer->SeekPosition().ToMicroseconds(),
target.mSeekError * pos);
pos += seekTime;
target.mDemuxer->Reset();
target.mDemuxer->Seek(TimeUnit::FromMicroseconds(pos));
frameData = target.mDemuxer->DemuxSample();
}
}
}