AVMediaType LibavSingleton::findPacketType(const AVFormatContext *formatContext,
const AVPacket *packet) const {
if (NULL == formatContext) {
throw IllegalArgumentException(
"The supplied format context for findPacketType(AVFormatContext*,AVPacket*) cannot be null.");
}
if (NULL == packet) {
throw IllegalArgumentException(
"The supplied packet for findPacketType(AVFormatContext*,AVPacket*) cannot be null.");
}
int packetIndex = packet->stream_index;
int streamNumber = formatContext->nb_streams;
// Check to make sure the packet index isn't out of bounds.
if (0 <= packetIndex && streamNumber < packetIndex) {
stringstream errorMessage;
errorMessage
<< "Packet index greater than stream number. Packet index: "
<< packetIndex << " Stream number: "
<< streamNumber << " File name: "
<< formatContext->filename << endl;
throw IllegalStateException(errorMessage.str());
}
return findStreamType(formatContext->streams[packetIndex]);
}
int DirectShowPlayerService::findStreamTypes(IBaseFilter *source) const
{
QVarLengthArray<IBaseFilter *, 16> filters;
source->AddRef();
filters.append(source);
int streamTypes = 0;
while (!filters.isEmpty()) {
IEnumPins *pins = 0;
IBaseFilter *filter = filters[filters.size() - 1];
filters.removeLast();
if (SUCCEEDED(filter->EnumPins(&pins))) {
for (IPin *pin = 0; pins->Next(1, &pin, 0) == S_OK; pin->Release()) {
PIN_DIRECTION direction;
if (pin->QueryDirection(&direction) == S_OK && direction == PINDIR_OUTPUT) {
AM_MEDIA_TYPE connectionType;
if (SUCCEEDED(pin->ConnectionMediaType(&connectionType))) {
IPin *peer = 0;
if (connectionType.majortype == MEDIATYPE_Audio) {
streamTypes |= AudioStream;
} else if (connectionType.majortype == MEDIATYPE_Video) {
streamTypes |= VideoStream;
} else if (SUCCEEDED(pin->ConnectedTo(&peer))) {
PIN_INFO peerInfo;
if (SUCCEEDED(peer->QueryPinInfo(&peerInfo)))
filters.append(peerInfo.pFilter);
peer->Release();
}
} else {
streamTypes |= findStreamType(pin);
}
}
}
}
filter->Release();
}
return streamTypes;
}