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

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7.1 KiB
C++

/* -*- 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 "VorbisTrackEncoder.h"
#include "WebMWriter.h"
#include "MediaStreamGraph.h"
using namespace mozilla;
class TestVorbisTrackEncoder : public VorbisTrackEncoder
{
public:
// Return true if it has successfully initialized the vorbis encoder.
bool TestVorbisCreation(int aChannels, int aSamplingRate)
{
if (Init(aChannels, aSamplingRate) == NS_OK) {
return true;
}
return false;
}
};
static bool
TestVorbisInit(int aChannels, int aSamplingRate)
{
TestVorbisTrackEncoder encoder;
return encoder.TestVorbisCreation(aChannels, aSamplingRate);
}
static int
ReadLacing(const uint8_t* aInput, uint32_t aInputLength, uint32_t& aReadBytes)
{
aReadBytes = 0;
int packetSize = 0;
while (aReadBytes < aInputLength) {
if (aInput[aReadBytes] == 255) {
packetSize += 255;
aReadBytes++;
} else { // the last byte
packetSize += aInput[aReadBytes];
aReadBytes++;
break;
}
}
return packetSize;
}
static bool
parseVorbisMetadata(nsTArray<uint8_t>& aData, int aChannels, int aRate)
{
uint32_t offset = 0;
// the first byte should be 2.
if (aData.ElementAt(0) != 2) {
return false;
}
offset = 1;
// Read the length of header and header_comm
uint32_t readbytes;
ogg_packet header;
ogg_packet header_comm;
ogg_packet header_code;
memset(&header, 0, sizeof(ogg_packet));
memset(&header_comm, 0, sizeof(ogg_packet));
memset(&header_code, 0, sizeof(ogg_packet));
int header_length;
int header_comm_length;
int header_code_length;
EXPECT_TRUE(offset < aData.Length());
header_length = ReadLacing(aData.Elements()+offset, aData.Length()-offset,
readbytes);
offset += readbytes;
EXPECT_TRUE(offset < aData.Length());
header_comm_length = ReadLacing(aData.Elements()+offset,
aData.Length()-offset, readbytes);
offset += readbytes;
EXPECT_TRUE(offset < aData.Length());
// The rest length is header_code.
header_code_length = aData.Length() - offset - header_length
- header_comm_length;
EXPECT_TRUE(header_code_length >= 32);
// Verify the three header packets by vorbis_synthesis_headerin.
// Raise the b_o_s (begin of stream) flag.
header.b_o_s = true;
header.packet = aData.Elements() + offset;
header.bytes = header_length;
offset += header_length;
header_comm.packet = aData.Elements() + offset;
header_comm.bytes = header_comm_length;
offset += header_comm_length;
header_code.packet = aData.Elements() + offset;
header_code.bytes = header_code_length;
vorbis_info vi;
vorbis_comment vc;
vorbis_info_init(&vi);
vorbis_comment_init(&vc);
EXPECT_TRUE(0 == vorbis_synthesis_headerin(&vi, &vc, &header));
EXPECT_TRUE(0 == vorbis_synthesis_headerin(&vi, &vc, &header_comm));
EXPECT_TRUE(0 == vorbis_synthesis_headerin(&vi, &vc, &header_code));
EXPECT_TRUE(vi.channels == aChannels);
EXPECT_TRUE(vi.rate == aRate);
vorbis_info_clear(&vi);
vorbis_comment_clear(&vc);
return true;
}
// Test init function
TEST(VorbisTrackEncoder, Init)
{
// Channel number range test
// Expect false with 0 or negative channels of input signal.
EXPECT_FALSE(TestVorbisInit(0, 16000));
EXPECT_FALSE(TestVorbisInit(-1, 16000));
EXPECT_FALSE(TestVorbisInit(8 + 1, 16000));
// Sample rate and channel range test.
for (int i = 1; i <= 8; i++) {
EXPECT_FALSE(TestVorbisInit(i, -1));
EXPECT_FALSE(TestVorbisInit(i, 2000));
EXPECT_FALSE(TestVorbisInit(i, 4000));
EXPECT_FALSE(TestVorbisInit(i, 7999));
EXPECT_TRUE(TestVorbisInit(i, 8000));
EXPECT_TRUE(TestVorbisInit(i, 11000));
EXPECT_TRUE(TestVorbisInit(i, 16000));
EXPECT_TRUE(TestVorbisInit(i, 22050));
EXPECT_TRUE(TestVorbisInit(i, 32000));
EXPECT_TRUE(TestVorbisInit(i, 44100));
EXPECT_TRUE(TestVorbisInit(i, 48000));
EXPECT_TRUE(TestVorbisInit(i, 96000));
EXPECT_TRUE(TestVorbisInit(i, 192000));
EXPECT_FALSE(TestVorbisInit(i, 192001));
EXPECT_FALSE(TestVorbisInit(i, 200000 + 1));
}
}
// Test metadata
TEST(VorbisTrackEncoder, Metadata)
{
// Initiate vorbis encoder.
TestVorbisTrackEncoder encoder;
int channels = 1;
int rate = 44100;
encoder.TestVorbisCreation(channels, rate);
nsRefPtr<TrackMetadataBase> meta = encoder.GetMetadata();
nsRefPtr<VorbisMetadata> vorbisMetadata(static_cast<VorbisMetadata*>(meta.get()));
// According to initialization parameters, verify the correctness
// of vorbisMetadata.
EXPECT_TRUE(vorbisMetadata->mChannels == channels);
EXPECT_TRUE(vorbisMetadata->mSamplingFrequency == rate);
EXPECT_TRUE(parseVorbisMetadata(vorbisMetadata->mData, channels, rate));
}
// Test encode function
TEST(VorbisTrackEncoder, EncodedFrame)
{
// Initiate vorbis encoder
TestVorbisTrackEncoder encoder;
int channels = 1;
int rate = 44100;
encoder.TestVorbisCreation(channels, rate);
// Generate 1 second samples.
// Reference PeerConnectionMedia.h::Fake_AudioGenerator
nsRefPtr<mozilla::SharedBuffer> samples =
mozilla::SharedBuffer::Create(rate * sizeof(AudioDataValue));
AudioDataValue* data = static_cast<AudioDataValue*>(samples->Data());
for (int i = 0; i < rate; i++) {
data[i] = ((i%8)*4000) - (7*4000)/2;
}
nsAutoTArray<const AudioDataValue*,1> channelData;
channelData.AppendElement(data);
AudioSegment segment;
segment.AppendFrames(samples.forget(), channelData, 44100);
// Track change notification.
encoder.NotifyQueuedTrackChanges(nullptr, 0, 0, 0, segment);
// Pull Encoded data back from encoder and verify encoded samples.
EncodedFrameContainer container;
EXPECT_TRUE(NS_SUCCEEDED(encoder.GetEncodedTrack(container)));
// Should have some encoded data.
EXPECT_TRUE(container.GetEncodedFrames().Length() > 0);
EXPECT_TRUE(container.GetEncodedFrames().ElementAt(0)->GetFrameData().Length()
> 0);
EXPECT_TRUE(container.GetEncodedFrames().ElementAt(0)->GetFrameType() ==
EncodedFrame::FrameType::VORBIS_AUDIO_FRAME);
// Encoded data doesn't have duration and timestamp.
EXPECT_TRUE(container.GetEncodedFrames().ElementAt(0)->GetDuration() == 0);
EXPECT_TRUE(container.GetEncodedFrames().ElementAt(0)->GetTimeStamp() == 0);
}
// EOS test
TEST(VorbisTrackEncoder, EncodeComplete)
{
// Initiate vorbis encoder
TestVorbisTrackEncoder encoder;
int channels = 1;
int rate = 44100;
encoder.TestVorbisCreation(channels, rate);
// Track end notification.
AudioSegment segment;
encoder.NotifyQueuedTrackChanges(nullptr, 0, 0,
MediaStreamListener::TRACK_EVENT_ENDED,
segment);
// Pull Encoded Data back from encoder. Since we had send out
// EOS to encoder, encoder.GetEncodedTrack should return
// NS_OK immidiately.
EncodedFrameContainer container;
EXPECT_TRUE(NS_SUCCEEDED(encoder.GetEncodedTrack(container)));
}