AUDIO: Add support for AAC audio

3 files changed, 296 insertions, 20 deletions

diff --git a/audio/decoders/aac.cpp b/audio/decoders/aac.cpp
new file mode 100644
index 0000000000..fb867250b7
--- /dev/null
+++ b/audio/decoders/aac.cpp
@@ -0,0 +1,178 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "audio/decoders/aac.h"
+
+#ifdef USE_FAAD
+
+#include "common/debug.h"
+#include "common/stream.h"
+#include "common/util.h"
+
+#include "audio/audiostream.h"
+
+#include <neaacdec.h>
+
+namespace Audio {
+
+class AACStream : public AudioStream {
+public:
+	AACStream(Common::SeekableReadStream *stream,
+	          DisposeAfterUse::Flag disposeStream,
+	          Common::SeekableReadStream *extraData,
+	          DisposeAfterUse::Flag disposeExtraData);
+	~AACStream();
+
+	int readBuffer(int16 *buffer, const int numSamples);
+
+	bool endOfData() const { return _inBufferPos >= _inBufferSize; }
+	bool isStereo() const { return _channels == 2; }
+	int getRate() const { return _rate; }
+
+private:
+	Common::SeekableReadStream *_stream;
+	DisposeAfterUse::Flag _disposeAfterUse;
+
+	NeAACDecHandle _handle;
+	byte _channels;
+	unsigned long _rate;
+
+	byte *_inBuffer;
+	uint32 _inBufferSize;
+	uint32 _inBufferPos;
+
+	int16 *_remainingSamples;
+	uint32 _remainingSamplesSize;
+	uint32 _remainingSamplesPos;
+
+	void init(Common::SeekableReadStream *extraData);
+};
+
+AACStream::AACStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeStream,
+		Common::SeekableReadStream *extraData, DisposeAfterUse::Flag disposeExtraData) {
+
+	_stream = stream;
+	_disposeAfterUse = disposeStream;
+	_remainingSamples = 0;
+	_inBufferPos = 0;
+
+	init(extraData);
+
+	// Copy all the data to a pointer so it can be passed through
+	// (At least MPEG-4 chunks shouldn't be large)
+	_inBufferSize = stream->size();
+	_inBuffer = new byte[_inBufferSize];
+	stream->read(_inBuffer, _inBufferSize);
+
+	if (disposeStream == DisposeAfterUse::YES)
+		delete stream;
+
+	if (disposeExtraData == DisposeAfterUse::YES)
+		delete extraData;
+}
+
+AACStream::~AACStream() {
+	NeAACDecClose(_handle);
+	delete[] _inBuffer;
+	delete[] _remainingSamples;
+}
+
+void AACStream::init(Common::SeekableReadStream *extraData) {
+	// 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));
+}
+
+int AACStream::readBuffer(int16 *buffer, const int numSamples) {
+	int samples = 0;
+
+	assert((numSamples % _channels) == 0);
+
+	if (_remainingSamples) {
+		samples = MIN<int>(numSamples, _remainingSamplesSize - _remainingSamplesPos);
+	
+		memcpy(buffer, _remainingSamples + _remainingSamplesPos, samples * 2);
+		_remainingSamplesPos += samples;
+
+		if (_remainingSamplesPos == _remainingSamplesSize) {
+			delete[] _remainingSamples;
+			_remainingSamples = 0;
+		}
+	}
+
+	while (samples < numSamples && !endOfData()) {
+		NeAACDecFrameInfo frameInfo;
+		uint16 *decodedSamples = (uint16 *)NeAACDecDecode(_handle, &frameInfo, _inBuffer + _inBufferPos, _inBufferSize - _inBufferPos);
+
+		if (frameInfo.error != 0)
+			error("Failed to decode AAC frame: %s", NeAACDecGetErrorMessage(frameInfo.error));
+
+		int decodedSampleSize = frameInfo.samples;
+		int copySamples = (decodedSampleSize > (numSamples - samples)) ? (numSamples - samples) : decodedSampleSize;
+
+		memcpy(buffer + samples, decodedSamples, copySamples * 2);
+		samples += copySamples;
+
+		if (copySamples != decodedSampleSize) {
+			_remainingSamplesSize = decodedSampleSize - copySamples;
+			_remainingSamples = new int16[_remainingSamplesSize];
+			_remainingSamplesPos = 0;
+			memcpy(_remainingSamples, decodedSamples + copySamples, _remainingSamplesSize * 2);
+		}
+
+		_inBufferPos += frameInfo.bytesconsumed;
+	}
+
+	return samples;
+}
+
+// Factory function
+AudioStream *makeAACStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeStream,
+		Common::SeekableReadStream *extraData, DisposeAfterUse::Flag disposeExtraData) {
+
+	return new AACStream(stream, disposeStream, extraData, disposeExtraData);
+}
+
+} // End of namespace Audio
+
+#endif // #ifdef USE_FAAD
diff --git a/audio/decoders/aac.h b/audio/decoders/aac.h
new file mode 100644
index 0000000000..f14fa9488b
--- /dev/null
+++ b/audio/decoders/aac.h
@@ -0,0 +1,66 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+/**
+ * @file
+ * Sound decoder used in engines:
+ *  - groovie
+ */
+
+#ifndef SOUND_AAC_H
+#define SOUND_AAC_H
+
+#include "common/scummsys.h"
+#include "common/types.h"
+
+#ifdef USE_FAAD
+
+namespace Common {
+	class SeekableReadStream;
+}
+
+namespace Audio {
+
+class AudioStream;
+
+/**
+ * Create a new AudioStream from the AAC data in the given stream.
+ *
+ * @param stream			the SeekableReadStream from which to read the AAC data
+ * @param disposeStream     whether to delete the stream after use
+ * @param extraData         the SeekableReadStream from which to read the AAC extra data
+ * @param disposeExtraData  whether to delete the extra data stream after use
+ * @return	a new AudioStream, or NULL, if an error occurred
+ */
+AudioStream *makeAACStream(
+	Common::SeekableReadStream *stream,
+	DisposeAfterUse::Flag disposeStream,
+	Common::SeekableReadStream *extraData,
+	DisposeAfterUse::Flag disposeExtraData = DisposeAfterUse::NO);
+
+} // End of namespace Audio
+
+#endif // #ifdef USE_FAAD
+#endif // #ifndef SOUND_AAC_H
diff --git a/audio/decoders/quicktime.cpp b/audio/decoders/quicktime.cpp
index e18ba7c480..9b69012c7a 100644
--- a/audio/decoders/quicktime.cpp
+++ b/audio/decoders/quicktime.cpp
@@ -32,6 +32,7 @@
 #include "audio/decoders/quicktime.h"
 
 // Codecs
+#include "audio/decoders/aac.h"
 #include "audio/decoders/adpcm.h"
 #include "audio/decoders/qdm2.h"
 #include "audio/decoders/raw.h"
@@ -153,9 +154,13 @@ bool QuickTimeAudioDecoder::checkAudioCodecSupport(uint32 tag, byte objectTypeMP
 	if (tag == MKID_BE('mp4a')) {
 		Common::String audioType;
 		switch (objectTypeMP4) {
-		case 0x40:
+		case 0x40: // AAC
+#ifdef USE_FAAD
+			return true;
+#else
 			audioType = "AAC";
 			break;
+#endif
 		default:
 			audioType = "Unknown";
 			break;
@@ -190,6 +195,12 @@ AudioStream *QuickTimeAudioDecoder::createAudioStream(Common::SeekableReadStream
 	} else if (entry->codecTag == MKID_BE('ima4')) {
 		// Riven uses this codec (as do some Myst ME videos)
 		return makeADPCMStream(stream, DisposeAfterUse::YES, stream->size(), kADPCMApple, entry->sampleRate, entry->channels, 34);
+	} else if (entry->codecTag == MKID_BE('mp4a')) {
+		// The 7th Guest iOS uses an MPEG-4 codec
+#ifdef USE_FAAD
+		if (_streams[_audioStreamIndex]->objectTypeMP4 == 0x40)
+			return makeAACStream(stream, DisposeAfterUse::YES, _streams[_audioStreamIndex]->extradata);
+#endif
 #ifdef AUDIO_QDM2_H
 	} else if (entry->codecTag == MKID_BE('QDM2')) {
 		// Myst ME uses this codec for many videos
@@ -225,27 +236,48 @@ void QuickTimeAudioDecoder::queueNextAudioChunk() {
 	uint32 sampleCount = getAudioChunkSampleCount(_curAudioChunk);
 	assert(sampleCount);
 
-	// Then calculate the right sizes
-	while (sampleCount > 0) {
-		uint32 samples = 0, size = 0;
+	if (_streams[_audioStreamIndex]->stts_count == 1 && _streams[_audioStreamIndex]->stts_data[0].duration == 1) {
+		// Old-style audio demuxing
+
+		// Then calculate the right sizes
+		while (sampleCount > 0) {
+			uint32 samples = 0, size = 0;
+
+			if (entry->samplesPerFrame >= 160) {
+				samples = entry->samplesPerFrame;
+				size = entry->bytesPerFrame;
+			} else if (entry->samplesPerFrame > 1) {
+				samples = MIN<uint32>((1024 / entry->samplesPerFrame) * entry->samplesPerFrame, sampleCount);
+				size = (samples / entry->samplesPerFrame) * entry->bytesPerFrame;
+			} else {
+				samples = MIN<uint32>(1024, sampleCount);
+				size = samples * _streams[_audioStreamIndex]->sample_size;
+			}
 
-		if (entry->samplesPerFrame >= 160) {
-			samples = entry->samplesPerFrame;
-			size = entry->bytesPerFrame;
-		} else if (entry->samplesPerFrame > 1) {
-			samples = MIN<uint32>((1024 / entry->samplesPerFrame) * entry->samplesPerFrame, sampleCount);
-			size = (samples / entry->samplesPerFrame) * entry->bytesPerFrame;
-		} else {
-			samples = MIN<uint32>(1024, sampleCount);
-			size = samples * _streams[_audioStreamIndex]->sample_size;
+			// Now, we read in the data for this data and output it
+			byte *data = (byte *)malloc(size);
+			_fd->read(data, size);
+			wStream->write(data, size);
+			free(data);
+			sampleCount -= samples;
+		}
+	} else {
+		// New-style audio demuxing
+
+		// Find our starting sample
+		uint32 startSample = 0;
+		for (uint32 i = 0; i < _curAudioChunk; i++)
+			startSample += getAudioChunkSampleCount(i);
+
+		for (uint32 i = 0; i < sampleCount; i++) {
+			uint32 size = (_streams[_audioStreamIndex]->sample_size != 0) ? _streams[_audioStreamIndex]->sample_size : _streams[_audioStreamIndex]->sample_sizes[i + startSample];
+
+			// Now, we read in the data for this data and output it
+			byte *data = (byte *)malloc(size);
+			_fd->read(data, size);
+			wStream->write(data, size);
+			free(data);
 		}
-
-		// Now, we read in the data for this data and output it
-		byte *data = (byte *)malloc(size);
-		_fd->read(data, size);
-		wStream->write(data, size);
-		free(data);
-		sampleCount -= samples;
 	}
 
 	// Now queue the buffer