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engines/ultima/ultima8/audio/sound_flex.cpp

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "ultima/ultima8/misc/debugger.h"
+
+#include "ultima/ultima8/audio/sound_flex.h"
+#include "ultima/ultima8/audio/sonarc_audio_sample.h"
+#include "ultima/ultima8/audio/raw_audio_sample.h"
+
+#include "common/memstream.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+SoundFlex::SoundFlex(Common::SeekableReadStream *rs) : Archive(rs), _samples(nullptr) {
+	uint32 size = 0;
+	uint8 *buf = getRawObject(0, &size);
+
+	if (!size || !buf) {
+		warning("couldn't load sound flex");
+		return;
+	}
+
+	Common::MemoryReadStream st(buf, size);
+
+	_index.push_back(SoundFlexEntry(""));
+	if (buf[0] == 0xFF) {
+		// Crusader flex has an index in the first object with the format:
+		// [00 or FF] [ 3 bytes, often 'oB0' or 'pB0' ] [ null-terminated name ]
+		// read this data in and work out how to interpret it - probably tells
+		// some info about how to play back the raw sounds (eg, loop points?)
+		while (!st.eos() && _index.size() < _count) {
+			uint32 data = st.readUint32LE();
+			Std::string str;
+			char c = st.readByte();
+			while (c != 0 && !st.eos()) {
+				str.push_back(c);
+				c = st.readByte();
+			}
+			_index.push_back(SoundFlexEntry(str.c_str(), data));
+		}
+	} else {
+		// In U8 the first object just has 8-byte names.
+		char name[9] = {0};
+		int entries = MIN(size / 8, _count);
+		for (int i = 0; i < entries; i++) {
+			st.read(name, 8);
+			_index.push_back(SoundFlexEntry(name));
+		}
+	}
+}
+
+SoundFlex::~SoundFlex() {
+	Archive::uncache();
+	delete [] _samples;
+}
+
+AudioSample *SoundFlex::getSample(uint32 index) {
+	if (index >= _count)
+		return nullptr;
+	cache(index);
+	return _samples[index];
+}
+
+void SoundFlex::cache(uint32 index) {
+	if (index >= _count) return;
+
+	if (!_samples) {
+		_samples = new AudioSample * [_count];
+		memset(_samples, 0, sizeof(AudioSample *) * _count);
+	}
+
+	if (_samples[index]) return;
+
+	// This will cache the data
+	uint32 size;
+	uint8 *buf = getRawObject(index, &size);
+
+	if (!buf || !size) return;
+
+	if (strncmp(reinterpret_cast<const char *>(buf), "ASFX", 4) == 0) {
+		// After the 32 byte header, ASFX (crusader audio) is just raw 11025 data
+		if (index < _index.size()) {
+			const SoundFlexEntry &entry = _index[index];
+			debug(6, "SoundFlex: Playing sfx %d (%s) with data 0x%04X", index, entry._name.c_str(), entry._data);
+		}
+		_samples[index] = new RawAudioSample(buf + 32, size - 32, 11025, true, false);
+	} else {
+		_samples[index] = new SonarcAudioSample(buf, size);
+	}
+}
+
+void SoundFlex::uncache(uint32 index) {
+	if (index >= _count) return;
+	if (!_samples) return;
+
+	delete _samples[index];
+	_samples[index] = nullptr;
+}
+
+bool SoundFlex::isCached(uint32 index) const {
+	if (index >= _count) return false;
+	if (!_samples) return false;
+
+	return (_samples[index] != nullptr);
+}
+
+} // End of namespace Ultima8
+} // End of namespace Ultima