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engines/ultima/ultima8/audio/speech_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/misc/common_types.h"
+#include "ultima/ultima8/audio/speech_flex.h"
+#include "ultima/ultima8/audio/audio_sample.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+SpeechFlex::SpeechFlex(Common::SeekableReadStream *rs) : SoundFlex(rs) {
+	uint32 size = getRawSize(0);
+	const uint8 *buf = getRawObject(0);
+
+	const char *cbuf = reinterpret_cast<const char *>(buf);
+
+	// Note: stream holds multiple null-terminated strings.
+	unsigned int off = 0;
+	while (off < size) {
+		unsigned int slen = 0;
+		while (off + slen < size && cbuf[off + slen])
+			slen++;
+		Std::string text(cbuf + off, slen);
+		text.replace('\t', ' ');
+		off += slen + 1;
+
+		Std::string::size_type pos1 = text.findFirstNotOf(' ');
+		if (pos1 == Std::string::npos) {
+			text = "";
+		}
+		else {
+			Std::string::size_type pos2 = text.findLastNotOf(' ');
+			text = text.substr(pos1, pos2 - pos1 + 1);
+		}
+
+		debug(6, "Found string: \"%s\"", text.c_str());
+		_phrases.push_back(text);
+	}
+
+	delete [] buf;
+
+}
+
+SpeechFlex::~SpeechFlex(void) {
+}
+
+int SpeechFlex::getIndexForPhrase(const Std::string &phrase,
+								  uint32 start, uint32 &end) const {
+	int i = 1;
+
+	Std::string text = phrase.substr(start);
+	text.replace('\t', ' ');
+
+	Std::string::size_type pos1 = text.findFirstNotOf(' ');
+	if (pos1 == Std::string::npos)
+		return 0;
+
+	Std::string::size_type pos2 = text.findLastNotOf(' ');
+	text = text.substr(pos1, pos2 - pos1 + 1);
+
+	debug(6, "Looking for string: \"%s\"", text.c_str());
+
+	for (const auto &p : _phrases) {
+		if (!p.empty() && text.hasPrefixIgnoreCase(p)) {
+			debug(6, "Found: %d", i);
+			end = p.size() + start + pos1;
+			if (end >= start + pos2)
+				end = phrase.size();
+			return i;
+		}
+		i++;
+	}
+
+	debug(6, "Not found");
+	return 0;
+}
+
+uint32 SpeechFlex::getSpeechLength(const Std::string &phrase) {
+	uint32 start = 0, end = 0;
+	uint32 length = 0;
+
+	while (end < phrase.size()) {
+		start = end;
+		int index = getIndexForPhrase(phrase, start, end);
+		if (!index) break;
+
+		const AudioSample *sample = getSample(index);
+		if (!sample) break;
+
+		uint32 samples = sample->getLength();
+		uint32 rate = sample->getRate();
+		bool stereo = sample->isStereo();
+		if (stereo) rate *= 2;
+
+		length += (samples * 1000) / rate;
+	}
+
+	return length;
+}
+
+} // End of namespace Ultima8
+} // End of namespace Ultima