aboutsummaryrefslogtreecommitdiff
path: root/audio/decoders/3do.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'audio/decoders/3do.cpp')
-rw-r--r--audio/decoders/3do.cpp343
1 files changed, 343 insertions, 0 deletions
diff --git a/audio/decoders/3do.cpp b/audio/decoders/3do.cpp
new file mode 100644
index 0000000000..6d558d4c8c
--- /dev/null
+++ b/audio/decoders/3do.cpp
@@ -0,0 +1,343 @@
+/* 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 "common/textconsole.h"
+#include "common/stream.h"
+#include "common/util.h"
+
+#include "audio/decoders/3do.h"
+#include "audio/decoders/raw.h"
+#include "audio/decoders/adpcm_intern.h"
+
+namespace Audio {
+
+// Reuses ADPCM table
+#define audio_3DO_ADP4_stepSizeTable Ima_ADPCMStream::_imaTable
+#define audio_3DO_ADP4_stepSizeIndex ADPCMStream::_stepAdjustTable
+
+RewindableAudioStream *make3DO_ADP4AudioStream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, uint32 *audioLengthMSecsPtr, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_ADP4_PersistentSpace *persistentSpace) {
+ if (stereo) {
+ warning("make3DO_ADP4Stream(): stereo currently not supported");
+ return 0;
+ }
+
+ if (audioLengthMSecsPtr) {
+ // Caller requires the milliseconds of audio
+ uint32 audioLengthMSecs = stream->size() * 2 * 1000 / sampleRate; // 1 byte == 2 16-bit sample
+ if (stereo) {
+ audioLengthMSecs /= 2;
+ }
+ *audioLengthMSecsPtr = audioLengthMSecs;
+ }
+
+ return new Audio3DO_ADP4_Stream(stream, sampleRate, stereo, disposeAfterUse, persistentSpace);
+}
+
+Audio3DO_ADP4_Stream::Audio3DO_ADP4_Stream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_ADP4_PersistentSpace *persistentSpace)
+ : _sampleRate(sampleRate), _stereo(stereo),
+ _stream(stream, disposeAfterUse) {
+
+ _callerDecoderData = persistentSpace;
+ memset(&_initialDecoderData, 0, sizeof(_initialDecoderData));
+ _initialRead = true;
+
+ reset();
+}
+
+void Audio3DO_ADP4_Stream::reset() {
+ memcpy(&_curDecoderData, &_initialDecoderData, sizeof(_curDecoderData));
+ _streamBytesLeft = _stream->size();
+ _stream->seek(0);
+}
+
+bool Audio3DO_ADP4_Stream::rewind() {
+ reset();
+ return true;
+}
+
+int16 Audio3DO_ADP4_Stream::decodeSample(byte compressedNibble) {
+ int16 currentStep = audio_3DO_ADP4_stepSizeTable[_curDecoderData.stepIndex];
+ int32 decodedSample = _curDecoderData.lastSample;
+ int16 delta = currentStep >> 3;
+
+ if (compressedNibble & 1)
+ delta += currentStep >> 2;
+
+ if (compressedNibble & 2)
+ delta += currentStep >> 1;
+
+ if (compressedNibble & 4)
+ delta += currentStep;
+
+ if (compressedNibble & 8) {
+ decodedSample -= delta;
+ } else {
+ decodedSample += delta;
+ }
+
+ _curDecoderData.lastSample = CLIP<int32>(decodedSample, -32768, 32767);
+
+ _curDecoderData.stepIndex += audio_3DO_ADP4_stepSizeIndex[compressedNibble & 0x07];
+ _curDecoderData.stepIndex = CLIP<int16>(_curDecoderData.stepIndex, 0, ARRAYSIZE(audio_3DO_ADP4_stepSizeTable) - 1);
+
+ return _curDecoderData.lastSample;
+}
+
+// Writes the requested amount (or less) of samples into buffer and returns the amount of samples, that got written
+int Audio3DO_ADP4_Stream::readBuffer(int16 *buffer, const int numSamples) {
+ int8 byteCache[AUDIO_3DO_CACHE_SIZE];
+ int8 *byteCachePtr = NULL;
+ int byteCacheSize = 0;
+ int requestedBytesLeft = 0;
+ int decodedSamplesCount = 0;
+
+ int8 compressedByte = 0;
+
+ if (endOfData())
+ return 0; // no more bytes left
+
+ if (_callerDecoderData) {
+ // copy caller decoder data over
+ memcpy(&_curDecoderData, _callerDecoderData, sizeof(_curDecoderData));
+ if (_initialRead) {
+ _initialRead = false;
+ memcpy(&_initialDecoderData, &_curDecoderData, sizeof(_initialDecoderData));
+ }
+ }
+
+ requestedBytesLeft = numSamples >> 1; // 1 byte for 2 16-bit sample
+ if (requestedBytesLeft > _streamBytesLeft)
+ requestedBytesLeft = _streamBytesLeft; // not enough bytes left
+
+ // in case caller requests an uneven amount of samples, we will return an even amount
+
+ // buffering, so that direct decoding of files and such runs way faster
+ while (requestedBytesLeft) {
+ if (requestedBytesLeft > AUDIO_3DO_CACHE_SIZE) {
+ byteCacheSize = AUDIO_3DO_CACHE_SIZE;
+ } else {
+ byteCacheSize = requestedBytesLeft;
+ }
+
+ requestedBytesLeft -= byteCacheSize;
+ _streamBytesLeft -= byteCacheSize;
+
+ // Fill our byte cache
+ _stream->read(byteCache, byteCacheSize);
+
+ byteCachePtr = byteCache;
+
+ // Mono
+ while (byteCacheSize) {
+ compressedByte = *byteCachePtr++;
+ byteCacheSize--;
+
+ buffer[decodedSamplesCount] = decodeSample(compressedByte >> 4);
+ decodedSamplesCount++;
+ buffer[decodedSamplesCount] = decodeSample(compressedByte & 0x0f);
+ decodedSamplesCount++;
+ }
+ }
+
+ if (_callerDecoderData) {
+ // copy caller decoder data back
+ memcpy(_callerDecoderData, &_curDecoderData, sizeof(_curDecoderData));
+ }
+
+ return decodedSamplesCount;
+}
+
+// ============================================================================
+static int16 audio_3DO_SDX2_SquareTable[256] = {
+ -32768,-32258,-31752,-31250,-30752,-30258,-29768,-29282,-28800,-28322,
+ -27848,-27378,-26912,-26450,-25992,-25538,-25088,-24642,-24200,-23762,
+ -23328,-22898,-22472,-22050,-21632,-21218,-20808,-20402,-20000,-19602,
+ -19208,-18818,-18432,-18050,-17672,-17298,-16928,-16562,-16200,-15842,
+ -15488,-15138,-14792,-14450,-14112,-13778,-13448,-13122,-12800,-12482,
+ -12168,-11858,-11552,-11250,-10952,-10658,-10368,-10082, -9800, -9522,
+ -9248, -8978, -8712, -8450, -8192, -7938, -7688, -7442, -7200, -6962,
+ -6728, -6498, -6272, -6050, -5832, -5618, -5408, -5202, -5000, -4802,
+ -4608, -4418, -4232, -4050, -3872, -3698, -3528, -3362, -3200, -3042,
+ -2888, -2738, -2592, -2450, -2312, -2178, -2048, -1922, -1800, -1682,
+ -1568, -1458, -1352, -1250, -1152, -1058, -968, -882, -800, -722,
+ -648, -578, -512, -450, -392, -338, -288, -242, -200, -162,
+ -128, -98, -72, -50, -32, -18, -8, -2, 0, 2,
+ 8, 18, 32, 50, 72, 98, 128, 162, 200, 242,
+ 288, 338, 392, 450, 512, 578, 648, 722, 800, 882,
+ 968, 1058, 1152, 1250, 1352, 1458, 1568, 1682, 1800, 1922,
+ 2048, 2178, 2312, 2450, 2592, 2738, 2888, 3042, 3200, 3362,
+ 3528, 3698, 3872, 4050, 4232, 4418, 4608, 4802, 5000, 5202,
+ 5408, 5618, 5832, 6050, 6272, 6498, 6728, 6962, 7200, 7442,
+ 7688, 7938, 8192, 8450, 8712, 8978, 9248, 9522, 9800, 10082,
+ 10368, 10658, 10952, 11250, 11552, 11858, 12168, 12482, 12800, 13122,
+ 13448, 13778, 14112, 14450, 14792, 15138, 15488, 15842, 16200, 16562,
+ 16928, 17298, 17672, 18050, 18432, 18818, 19208, 19602, 20000, 20402,
+ 20808, 21218, 21632, 22050, 22472, 22898, 23328, 23762, 24200, 24642,
+ 25088, 25538, 25992, 26450, 26912, 27378, 27848, 28322, 28800, 29282,
+ 29768, 30258, 30752, 31250, 31752, 32258
+};
+
+Audio3DO_SDX2_Stream::Audio3DO_SDX2_Stream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_SDX2_PersistentSpace *persistentSpace)
+ : _sampleRate(sampleRate), _stereo(stereo),
+ _stream(stream, disposeAfterUse) {
+
+ _callerDecoderData = persistentSpace;
+ memset(&_initialDecoderData, 0, sizeof(_initialDecoderData));
+ _initialRead = true;
+
+ reset();
+}
+
+void Audio3DO_SDX2_Stream::reset() {
+ memcpy(&_curDecoderData, &_initialDecoderData, sizeof(_curDecoderData));
+ _streamBytesLeft = _stream->size();
+ _stream->seek(0);
+}
+
+bool Audio3DO_SDX2_Stream::rewind() {
+ reset();
+ return true;
+}
+
+// Writes the requested amount (or less) of samples into buffer and returns the amount of samples, that got written
+int Audio3DO_SDX2_Stream::readBuffer(int16 *buffer, const int numSamples) {
+ int8 byteCache[AUDIO_3DO_CACHE_SIZE];
+ int8 *byteCachePtr = NULL;
+ int byteCacheSize = 0;
+ int requestedBytesLeft = numSamples; // 1 byte per 16-bit sample
+ int decodedSamplesCount = 0;
+
+ int8 compressedByte = 0;
+ uint8 squareTableOffset = 0;
+ int16 decodedSample = 0;
+
+ if (endOfData())
+ return 0; // no more bytes left
+
+ if (_stereo) {
+ // We expect numSamples to be even in case of Stereo audio
+ assert((numSamples & 1) == 0);
+ }
+
+ if (_callerDecoderData) {
+ // copy caller decoder data over
+ memcpy(&_curDecoderData, _callerDecoderData, sizeof(_curDecoderData));
+ if (_initialRead) {
+ _initialRead = false;
+ memcpy(&_initialDecoderData, &_curDecoderData, sizeof(_initialDecoderData));
+ }
+ }
+
+ requestedBytesLeft = numSamples;
+ if (requestedBytesLeft > _streamBytesLeft)
+ requestedBytesLeft = _streamBytesLeft; // not enough bytes left
+
+ // buffering, so that direct decoding of files and such runs way faster
+ while (requestedBytesLeft) {
+ if (requestedBytesLeft > AUDIO_3DO_CACHE_SIZE) {
+ byteCacheSize = AUDIO_3DO_CACHE_SIZE;
+ } else {
+ byteCacheSize = requestedBytesLeft;
+ }
+
+ requestedBytesLeft -= byteCacheSize;
+ _streamBytesLeft -= byteCacheSize;
+
+ // Fill our byte cache
+ _stream->read(byteCache, byteCacheSize);
+
+ byteCachePtr = byteCache;
+
+ if (!_stereo) {
+ // Mono
+ while (byteCacheSize) {
+ compressedByte = *byteCachePtr++;
+ byteCacheSize--;
+ squareTableOffset = compressedByte + 128;
+
+ if (!(compressedByte & 1))
+ _curDecoderData.lastSample1 = 0;
+
+ decodedSample = _curDecoderData.lastSample1 + audio_3DO_SDX2_SquareTable[squareTableOffset];
+ _curDecoderData.lastSample1 = decodedSample;
+
+ buffer[decodedSamplesCount] = decodedSample;
+ decodedSamplesCount++;
+ }
+ } else {
+ // Stereo
+ while (byteCacheSize) {
+ compressedByte = *byteCachePtr++;
+ byteCacheSize--;
+ squareTableOffset = compressedByte + 128;
+
+ if (!(decodedSamplesCount & 1)) {
+ // First channel
+ if (!(compressedByte & 1))
+ _curDecoderData.lastSample1 = 0;
+
+ decodedSample = _curDecoderData.lastSample1 + audio_3DO_SDX2_SquareTable[squareTableOffset];
+ _curDecoderData.lastSample1 = decodedSample;
+ } else {
+ // Second channel
+ if (!(compressedByte & 1))
+ _curDecoderData.lastSample2 = 0;
+
+ decodedSample = _curDecoderData.lastSample2 + audio_3DO_SDX2_SquareTable[squareTableOffset];
+ _curDecoderData.lastSample2 = decodedSample;
+ }
+
+ buffer[decodedSamplesCount] = decodedSample;
+ decodedSamplesCount++;
+ }
+ }
+ }
+
+ if (_callerDecoderData) {
+ // copy caller decoder data back
+ memcpy(_callerDecoderData, &_curDecoderData, sizeof(_curDecoderData));
+ }
+
+ return decodedSamplesCount;
+}
+
+RewindableAudioStream *make3DO_SDX2AudioStream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, uint32 *audioLengthMSecsPtr, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_SDX2_PersistentSpace *persistentSpace) {
+ if (stereo) {
+ if (stream->size() & 1) {
+ warning("make3DO_SDX2Stream(): stereo data is uneven size");
+ return 0;
+ }
+ }
+
+ if (audioLengthMSecsPtr) {
+ // Caller requires the milliseconds of audio
+ uint32 audioLengthMSecs = stream->size() * 1000 / sampleRate; // 1 byte == 1 16-bit sample
+ if (stereo) {
+ audioLengthMSecs /= 2;
+ }
+ *audioLengthMSecsPtr = audioLengthMSecs;
+ }
+
+ return new Audio3DO_SDX2_Stream(stream, sampleRate, stereo, disposeAfterUse, persistentSpace);
+}
+
+} // End of namespace Audio
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 04:09:31 +0000