int64_t
WaveReader::TimeToBytes(double aTime) const
{
MOZ_ASSERT(OnTaskQueue());
MOZ_ASSERT(aTime >= 0.0f, "Must be >= 0");
return RoundDownToFrame(int64_t(aTime * mSampleRate * mFrameSize));
}
nsresult WaveReader::Seek(int64_t aTarget, int64_t aStartTime, int64_t aEndTime, int64_t aCurrentTime)
{
NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
LOG(PR_LOG_DEBUG, ("%p About to seek to %lld", mDecoder, aTarget));
if (NS_FAILED(ResetDecode())) {
return NS_ERROR_FAILURE;
}
double d = BytesToTime(GetDataLength());
NS_ASSERTION(d < INT64_MAX / USECS_PER_S, "Duration overflow");
int64_t duration = static_cast<int64_t>(d * USECS_PER_S);
double seekTime = NS_MIN(aTarget, duration) / static_cast<double>(USECS_PER_S);
int64_t position = RoundDownToFrame(static_cast<int64_t>(TimeToBytes(seekTime)));
NS_ASSERTION(INT64_MAX - mWavePCMOffset > position, "Integer overflow during wave seek");
position += mWavePCMOffset;
return mDecoder->GetResource()->Seek(nsISeekableStream::NS_SEEK_SET, position);
}
nsRefPtr<MediaDecoderReader::SeekPromise>
WaveReader::Seek(int64_t aTarget, int64_t aEndTime)
{
MOZ_ASSERT(OnTaskQueue());
LOG(LogLevel::Debug, ("%p About to seek to %lld", mDecoder, aTarget));
if (NS_FAILED(ResetDecode())) {
return SeekPromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
double d = BytesToTime(GetDataLength());
NS_ASSERTION(d < INT64_MAX / USECS_PER_S, "Duration overflow");
int64_t duration = static_cast<int64_t>(d * USECS_PER_S);
double seekTime = std::min(aTarget, duration) / static_cast<double>(USECS_PER_S);
int64_t position = RoundDownToFrame(static_cast<int64_t>(TimeToBytes(seekTime)));
NS_ASSERTION(INT64_MAX - mWavePCMOffset > position, "Integer overflow during wave seek");
position += mWavePCMOffset;
nsresult res = mDecoder->GetResource()->Seek(nsISeekableStream::NS_SEEK_SET, position);
if (NS_FAILED(res)) {
return SeekPromise::CreateAndReject(res, __func__);
} else {
return SeekPromise::CreateAndResolve(aTarget, __func__);
}
}
int64_t
WaveReader::TimeToBytes(double aTime) const
{
NS_ABORT_IF_FALSE(aTime >= 0.0f, "Must be >= 0");
return RoundDownToFrame(int64_t(aTime * mSampleRate * mFrameSize));
}