mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 04:34:50 +00:00
131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
|
|
#include "audio/decoders/aac.h"
|
|
|
|
#ifdef USE_FAAD
|
|
|
|
#include "common/debug.h"
|
|
#include "common/memstream.h"
|
|
#include "common/stream.h"
|
|
#include "common/textconsole.h"
|
|
#include "common/util.h"
|
|
|
|
#include "audio/audiostream.h"
|
|
#include "audio/decoders/codec.h"
|
|
#include "audio/decoders/raw.h"
|
|
|
|
#include <neaacdec.h>
|
|
|
|
namespace Audio {
|
|
|
|
class AACDecoder : public Codec {
|
|
public:
|
|
AACDecoder(Common::SeekableReadStream *extraData,
|
|
DisposeAfterUse::Flag disposeExtraData);
|
|
~AACDecoder();
|
|
|
|
AudioStream *decodeFrame(Common::SeekableReadStream &stream);
|
|
|
|
private:
|
|
NeAACDecHandle _handle;
|
|
byte _channels;
|
|
unsigned long _rate;
|
|
};
|
|
|
|
AACDecoder::AACDecoder(Common::SeekableReadStream *extraData, DisposeAfterUse::Flag disposeExtraData) {
|
|
// Open the library
|
|
_handle = NeAACDecOpen();
|
|
|
|
// Configure the library to our needs
|
|
NeAACDecConfigurationPtr conf = NeAACDecGetCurrentConfiguration(_handle);
|
|
conf->outputFormat = FAAD_FMT_16BIT; // We only support 16bit audio
|
|
conf->downMatrix = 1; // Convert from 5.1 to stereo if required
|
|
NeAACDecSetConfiguration(_handle, conf);
|
|
|
|
// Copy the extra data to a buffer
|
|
extraData->seek(0);
|
|
byte *extraDataBuf = new byte[extraData->size()];
|
|
extraData->read(extraDataBuf, extraData->size());
|
|
|
|
// Initialize with our extra data
|
|
// NOTE: This code assumes the extra data is coming from an MPEG-4 file!
|
|
int err = NeAACDecInit2(_handle, extraDataBuf, extraData->size(), &_rate, &_channels);
|
|
delete[] extraDataBuf;
|
|
|
|
if (err < 0)
|
|
error("Could not initialize AAC decoder: %s", NeAACDecGetErrorMessage(err));
|
|
|
|
if (disposeExtraData == DisposeAfterUse::YES)
|
|
delete extraData;
|
|
}
|
|
|
|
AACDecoder::~AACDecoder() {
|
|
NeAACDecClose(_handle);
|
|
}
|
|
|
|
AudioStream *AACDecoder::decodeFrame(Common::SeekableReadStream &stream) {
|
|
// read everything into a buffer
|
|
uint32 inBufferPos = 0;
|
|
uint32 inBufferSize = stream.size();
|
|
byte *inBuffer = new byte[inBufferSize];
|
|
stream.read(inBuffer, inBufferSize);
|
|
|
|
QueuingAudioStream *audioStream = makeQueuingAudioStream(_rate, _channels == 2);
|
|
|
|
// Decode until we have enough samples (or there's no more left)
|
|
while (inBufferPos < inBufferSize) {
|
|
NeAACDecFrameInfo frameInfo;
|
|
void *decodedSamples = NeAACDecDecode(_handle, &frameInfo, inBuffer + inBufferPos, inBufferSize - inBufferPos);
|
|
|
|
if (frameInfo.error != 0)
|
|
error("Failed to decode AAC frame: %s", NeAACDecGetErrorMessage(frameInfo.error));
|
|
|
|
byte *buffer = (byte *)malloc(frameInfo.samples * 2);
|
|
memcpy(buffer, decodedSamples, frameInfo.samples * 2);
|
|
|
|
byte flags = FLAG_16BITS;
|
|
|
|
if (_channels == 2)
|
|
flags |= FLAG_STEREO;
|
|
|
|
#ifdef SCUMM_LITTLE_ENDIAN
|
|
flags |= FLAG_LITTLE_ENDIAN;
|
|
#endif
|
|
|
|
audioStream->queueBuffer(buffer, frameInfo.samples * 2, DisposeAfterUse::YES, flags);
|
|
|
|
inBufferPos += frameInfo.bytesconsumed;
|
|
}
|
|
|
|
return audioStream;
|
|
}
|
|
|
|
// Factory function
|
|
Codec *makeAACDecoder(Common::SeekableReadStream *extraData, DisposeAfterUse::Flag disposeExtraData) {
|
|
return new AACDecoder(extraData, disposeExtraData);
|
|
}
|
|
|
|
} // End of namespace Audio
|
|
|
|
#endif // #ifdef USE_FAAD
|