void
MediaParserGst::emitEncodedFrames()
{
while (!_enc_audio_frames.empty()) {
EncodedAudioFrame* frame = _enc_audio_frames.front();
pushEncodedAudioFrame(std::auto_ptr<EncodedAudioFrame>(frame));
_enc_audio_frames.pop_front();
}
while (!_enc_video_frames.empty()) {
EncodedVideoFrame* frame = _enc_video_frames.front();
pushEncodedVideoFrame(std::auto_ptr<EncodedVideoFrame>(frame));
_enc_video_frames.pop_front();
}
}
bool
MediaParserGst::emitEncodedFrames()
{
if (_enc_audio_frames.empty() && _enc_video_frames.empty()) {
return false;
}
while (!_enc_audio_frames.empty()) {
EncodedAudioFrame* frame = _enc_audio_frames.front();
pushEncodedAudioFrame(std::auto_ptr<EncodedAudioFrame>(frame));
_enc_audio_frames.pop_front();
}
while (!_enc_video_frames.empty()) {
EncodedVideoFrame* frame = _enc_video_frames.front();
pushEncodedVideoFrame(std::auto_ptr<EncodedVideoFrame>(frame));
_enc_video_frames.pop_front();
}
return true;
}
// would be called by parser thread
bool
FLVParser::parseNextTag(bool index_only)
{
// lock the stream while reading from it, so actionscript
// won't mess with the parser on seek or on getBytesLoaded
boost::mutex::scoped_lock streamLock(_streamMutex);
if ( index_only && _indexingCompleted ) return false;
if ( _parsingComplete ) return false;
if ( _seekRequest )
{
clearBuffers();
_seekRequest = false;
}
boost::uint64_t& position = index_only ? _nextPosToIndex : _lastParsedPosition;
bool& completed = index_only ? _indexingCompleted : _parsingComplete;
//log_debug("parseNextTag: _lastParsedPosition:%d, _nextPosToIndex:%d, index_only:%d", _lastParsedPosition, _nextPosToIndex, index_only);
unsigned long thisTagPos = position;
// Seek to next frame and skip the tag size
//log_debug("FLVParser::parseNextTag seeking to %d", thisTagPos+4);
if (!_stream->seek(thisTagPos+4))
{
log_error(_("FLVParser::parseNextTag: can't seek to %d"),
thisTagPos+4);
completed = true;
return false;
}
//log_debug("FLVParser::parseNextTag seeked to %d", thisTagPos+4);
// Read the tag info
boost::uint8_t chunk[12];
int actuallyRead = _stream->read(chunk, 12);
if ( actuallyRead < 12 )
{
if ( actuallyRead )
log_error(_("FLVParser::parseNextTag: can't read tag info "
"(needed 12 bytes, only got %d)"), actuallyRead);
// else { assert(_stream->eof(); } ?
completed = true;
// update bytes loaded
boost::mutex::scoped_lock lock(_bytesLoadedMutex);
_bytesLoaded = _stream->tell();
return false;
}
FLVTag flvtag(chunk);
// May be _lastParsedPosition OR _nextPosToIndex
position += 15 + flvtag.body_size;
bool doIndex = (_lastParsedPosition+4 > _nextPosToIndex) || index_only;
if ( _lastParsedPosition > _nextPosToIndex )
{
//log_debug("::parseNextTag setting _nextPosToIndex=%d", _lastParsedPosition+4);
_nextPosToIndex = _lastParsedPosition;
}
if ( position > _bytesLoaded ) {
boost::mutex::scoped_lock lock(_bytesLoadedMutex);
_bytesLoaded = position;
}
// check for empty tag
if (flvtag.body_size == 0) return true;
if (flvtag.type == FLV_AUDIO_TAG)
{
FLVAudioTag audiotag(chunk[11]);
if (doIndex) {
indexAudioTag(flvtag, thisTagPos);
if (index_only) {
return true;
}
}
std::auto_ptr<EncodedAudioFrame> frame =
parseAudioTag(flvtag, audiotag, thisTagPos);
if (!frame.get()) {
return false;
}
// Release the stream lock
// *before* pushing the frame as that
// might block us waiting for buffers flush
// the _qMutex...
// We've done using the stream for this tag parsing anyway
streamLock.unlock();
pushEncodedAudioFrame(frame);
}
else if (flvtag.type == FLV_VIDEO_TAG)
{
FLVVideoTag videotag(chunk[11]);
if (doIndex) {
indexVideoTag(flvtag, videotag, thisTagPos);
if (index_only) {
return true;
}
}
std::auto_ptr<EncodedVideoFrame> frame =
parseVideoTag(flvtag, videotag, thisTagPos);
if (!frame.get()) {
return false;
}
// Release the stream lock
// *before* pushing the frame as that
// might block us waiting for buffers flush
// the _qMutex...
streamLock.unlock();
pushEncodedVideoFrame(frame);
}
else if (flvtag.type == FLV_META_TAG)
{
if ( chunk[11] != 2 )
{
// ::processTags relies on the first AMF0 value being a string...
log_unimpl(_("First byte of FLV_META_TAG is %d, expected "
"0x02 (STRING AMF0 type)"),
static_cast<int>(chunk[11]));
}
// Extract information from the meta tag
std::auto_ptr<SimpleBuffer> metaTag(new SimpleBuffer(
flvtag.body_size-1));
size_t actuallyRead = _stream->read(metaTag->data(),
flvtag.body_size - 1);
if ( actuallyRead < flvtag.body_size-1 )
{
log_error(_("FLVParser::parseNextTag: can't read metaTag (%d) "
"body (needed %d bytes, only got %d)"),
FLV_META_TAG, flvtag.body_size, actuallyRead);
return false;
}
metaTag->resize(actuallyRead);
boost::uint32_t terminus = getUInt24(metaTag->data() +
actuallyRead - 3);
if (terminus != 9) {
log_error(_("Corrupt FLV: Meta tag unterminated!"));
}
boost::mutex::scoped_lock lock(_metaTagsMutex);
_metaTags.insert(std::make_pair(flvtag.timestamp, MetaTags::mapped_type(metaTag)));
}
else
{
log_error(_("FLVParser::parseNextTag: unknown FLV tag type %d"),
(int)chunk[0]);
return false;
}
_stream->read(chunk, 4);
boost::uint32_t prevtagsize = chunk[0] << 24 | chunk[1] << 16 |
chunk[2] << 8 | chunk[3];
if (prevtagsize != flvtag.body_size + 11) {
log_error(_("Corrupt FLV: previous tag size record (%1%) unexpected "
"(actual size: %2%)"), prevtagsize, flvtag.body_size + 11);
}
return true;
}
