bool
EmbedSoundInst::reachedCustomEnd() const
{
if (_outPoint == std::numeric_limits<unsigned long>::max()) return false;
if (playbackPosition() >= _outPoint) return true;
return false;
}
void
EmbedSoundInst::decodeNextBlock()
{
assert(!decodingCompleted());
// this value is arbitrary, things would also work
// with a smaller value, but 2^16 seems fast enough
// to decode not to bother further streamlining it
// See https://savannah.gnu.org/bugs/?25456 for a testcase
// showing the benefit of chunked decoding.
const std::uint32_t chunkSize = 65535;
std::uint32_t inputSize = _soundDef.size() - decodingPosition;
if ( inputSize > chunkSize ) inputSize = chunkSize;
#ifdef GNASH_DEBUG_SOUNDS_DECODING
log_debug(" decoding %d bytes", inputSize);
#endif
assert(inputSize);
const std::uint8_t* input = _soundDef.data(decodingPosition);
std::uint32_t consumed = 0;
std::uint32_t decodedDataSize = 0;
std::uint8_t* decodedData = decoder().decode(input, inputSize,
decodedDataSize, consumed);
decodingPosition += consumed;
assert(!(decodedDataSize%2));
// @todo I hope there are no alignment issues in this cast from int8_t* to int16_t* !
std::int16_t* samples = reinterpret_cast<std::int16_t*>(decodedData);
unsigned int nSamples = decodedDataSize/2;
#ifdef GNASH_DEBUG_MIXING
log_debug(" applying volume/envelope to %d bytes (%d samples)"
"of decoded data", decodedDataSize, nSamples);
#endif
// Adjust volume
if (_soundDef.volume != 100) {
adjustVolume(samples, samples + nSamples, _soundDef.volume/100.0);
}
/// @todo is use of envelopes really mutually exclusive with
/// setting the volume ??
else if (envelopes) {
unsigned int firstSample = playbackPosition() / 2;
applyEnvelopes(samples, nSamples, firstSample, *envelopes);
}
#ifdef GNASH_DEBUG_MIXING
log_debug(" appending %d bytes to decoded buffer", decodedDataSize);
#endif
// decodedData ownership transferred here
appendDecodedData(SimpleBuffer(decodedDataSize, decodedData));
}
/*
* Play the current position of the loop
*/
void Midilooper_Loop::play() {
unsigned int _position = playbackPosition();
if (_position != _last_position) {
for (int i = 0; i < _current_instruction_position; i++) {
unsigned int check_time = _instruction_times[i];
if (check_time >= _last_position && check_time < _position) {
_instructions[i].run();
}
}
_last_position = _position;
}
}