void MediaOmxReader::NotifyDataArrivedInternal(uint32_t aLength, int64_t aOffset)
{
MOZ_ASSERT(OnTaskQueue());
nsRefPtr<AbstractMediaDecoder> decoder = SafeGetDecoder();
if (!decoder) { // reader has shut down
return;
}
if (HasVideo()) {
return;
}
if (!mMP3FrameParser.NeedsData()) {
return;
}
nsRefPtr<MediaByteBuffer> bytes =
mDecoder->GetResource()->MediaReadAt(aOffset, aLength);
NS_ENSURE_TRUE_VOID(bytes);
mMP3FrameParser.Parse(bytes->Elements(), aLength, aOffset);
if (!mMP3FrameParser.IsMP3()) {
return;
}
int64_t duration = mMP3FrameParser.GetDuration();
if (duration != mLastParserDuration) {
mLastParserDuration = duration;
decoder->DispatchUpdateEstimatedMediaDuration(mLastParserDuration);
}
}
int64_t MediaOmxReader::ProcessCachedData(int64_t aOffset)
{
// Could run on decoder thread or IO thread.
nsRefPtr<AbstractMediaDecoder> decoder = SafeGetDecoder();
if (!decoder) { // reader has shut down
return -1;
}
// We read data in chunks of 32 KiB. We can reduce this
// value if media, such as sdcards, is too slow.
// Because of SD card's slowness, need to keep sReadSize to small size.
// See Bug 914870.
static const int64_t sReadSize = 32 * 1024;
NS_ASSERTION(!NS_IsMainThread(), "Should not be on main thread.");
MOZ_ASSERT(decoder->GetResource());
int64_t resourceLength = decoder->GetResource()->GetCachedDataEnd(0);
NS_ENSURE_TRUE(resourceLength >= 0, -1);
if (aOffset >= resourceLength) {
return 0; // Cache is empty, nothing to do
}
int64_t bufferLength = std::min<int64_t>(resourceLength-aOffset, sReadSize);
nsRefPtr<NotifyDataArrivedRunnable> runnable(
new NotifyDataArrivedRunnable(this, bufferLength, aOffset, resourceLength));
if (OnTaskQueue()) {
runnable->Run();
} else {
OwnerThread()->Dispatch(runnable.forget());
}
return resourceLength - aOffset - bufferLength;
}
void MediaOmxReader::NotifyDataArrivedInternal()
{
MOZ_ASSERT(OnTaskQueue());
RefPtr<AbstractMediaDecoder> decoder = SafeGetDecoder();
if (!decoder) { // reader has shut down
return;
}
if (HasVideo()) {
return;
}
if (!mMP3FrameParser.NeedsData()) {
return;
}
AutoPinned<MediaResource> resource(mDecoder->GetResource());
MediaByteRangeSet byteRanges;
nsresult rv = resource->GetCachedRanges(byteRanges);
if (NS_FAILED(rv)) {
return;
}
if (byteRanges == mLastCachedRanges) {
return;
}
MediaByteRangeSet intervals = byteRanges - mLastCachedRanges;
mLastCachedRanges = byteRanges;
for (const auto& interval : intervals) {
RefPtr<MediaByteBuffer> bytes =
resource->MediaReadAt(interval.mStart, interval.Length());
NS_ENSURE_TRUE_VOID(bytes);
mMP3FrameParser.Parse(bytes->Elements(), interval.Length(), interval.mStart);
if (!mMP3FrameParser.IsMP3()) {
return;
}
}
int64_t duration = mMP3FrameParser.GetDuration();
if (duration != mLastParserDuration) {
mLastParserDuration = duration;
decoder->DispatchUpdateEstimatedMediaDuration(mLastParserDuration);
}
}