MADS: Implement the audio player

This is used for all digital samples, plus voices in talkie versions.
Currently, it's only hooked to the "play_audio" debugger command

1 files changed, 129 insertions, 0 deletions

diff --git a/engines/mads/audio.cpp b/engines/mads/audio.cpp
new file mode 100644
index 0000000000..0a9637bfcf
--- /dev/null
+++ b/engines/mads/audio.cpp
@@ -0,0 +1,129 @@
+/* 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 "mads/audio.h"
+#include "mads/compression.h"
+
+#include "common/stream.h"
+#include "audio/audiostream.h"
+#include "audio/mixer.h"
+#include "audio/decoders/raw.h"
+
+namespace MADS {
+
+AudioPlayer::AudioPlayer(Audio::Mixer *mixer, uint32 gameID) : _mixer(mixer), _gameID(gameID) {
+	setVolume(Audio::Mixer::kMaxChannelVolume);
+	setDefaultSoundGroup();
+}
+
+AudioPlayer::~AudioPlayer() {
+	_dsrEntries.clear();
+}
+
+bool AudioPlayer::isPlaying() const {
+	return _mixer->isSoundHandleActive(_handle);
+}
+
+void AudioPlayer::setVolume(int volume) {
+	_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, volume);
+	_mixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, volume);
+}
+
+void AudioPlayer::setDefaultSoundGroup() {
+	switch (_gameID) {
+	case GType_RexNebular:
+		setSoundGroup("rex009.dsr");
+		break;
+	case GType_Dragonsphere:
+		setSoundGroup("drag009.dsr");
+		break;
+	case GType_Phantom:
+		setSoundGroup("phan009.dsr");
+		break;
+	default:
+		error("setDefaultSoundGroup: Unknown game");
+	}
+}
+
+void AudioPlayer::setSoundGroup(const Common::String &filename) {
+	_dsrEntries.clear();
+
+	_filename = filename;
+	_dsrFile.open(filename);
+
+	// Read header
+	uint16 entryCount = _dsrFile.readUint16LE();
+
+	for (uint16 i = 0; i < entryCount; i++) {
+		DSREntry newEntry;
+		newEntry.frequency = _dsrFile.readUint16LE();
+		newEntry.channels = _dsrFile.readUint32LE();
+		newEntry.compSize = _dsrFile.readUint32LE();
+		newEntry.uncompSize = _dsrFile.readUint32LE();
+		newEntry.offset = _dsrFile.readUint32LE();
+		_dsrEntries.push_back(newEntry);
+	}
+
+	_dsrFile.close();
+}
+
+void AudioPlayer::playSound(int soundIndex, bool loop) {
+	if (_dsrEntries.empty()) {
+		warning("DSR file not loaded, not playing sound");
+		return;
+	}
+
+	if (soundIndex < 0 || soundIndex > _dsrEntries.size() - 1) {
+		warning("Invalid sound index: %i (max %i), not playing sound", soundIndex, _dsrEntries.size() - 1);
+		return;
+	}
+
+	// Get sound data
+	FabDecompressor fab;
+	int32 compSize = _dsrEntries[soundIndex].compSize;
+	int32 uncompSize = _dsrEntries[soundIndex].uncompSize;
+	int32 offset = _dsrEntries[soundIndex].offset;
+	int16 frequency = _dsrEntries[soundIndex].frequency;
+	byte *compData = new byte[compSize];
+	byte *buffer = new byte[uncompSize];
+	_dsrFile.open(_filename);
+	_dsrFile.seek(offset, SEEK_SET);
+	_dsrFile.read(compData, compSize);
+	_dsrFile.close();
+
+	fab.decompress(compData, compSize, buffer, uncompSize);
+
+	// Play sound
+	Audio::AudioStream *stream = Audio::makeLoopingAudioStream(
+				Audio::makeRawStream(buffer, uncompSize, frequency, Audio::FLAG_UNSIGNED),
+				loop ? 0 : 1);
+	_mixer->playStream(Audio::Mixer::kSFXSoundType, &_handle, stream, -1,  Audio::Mixer::kMaxChannelVolume);
+
+	/*
+	// Dump the sound file
+	FILE *destFile = fopen("sound.raw", "wb");
+	fwrite(_dsrFile.dsrEntries[soundIndex]->data, _dsrFile.dsrEntries[soundIndex].uncompSize, 1, destFile);
+	fclose(destFile);
+	*/
+}
+
+} // End of namespace M4