diff options
Diffstat (limited to 'engines/made/sound.cpp')
| -rw-r--r-- | engines/made/sound.cpp | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/engines/made/sound.cpp b/engines/made/sound.cpp index f73c580560..ad49031e7b 100644 --- a/engines/made/sound.cpp +++ b/engines/made/sound.cpp @@ -8,12 +8,12 @@ * 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. @@ -133,10 +133,10 @@ void ManholeEgaSoundDecompressor::update3() { _sample2 += _sample1; } -void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCount, SoundEnergyArray *soundEnergyArray) { +void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCount, SoundEnergyArray *soundEnergyArray, SoundDecoderData *soundDecoderData) { - int16 prevSample = 0, workSample = 0; - byte soundBuffer[1025]; + int16 prevSample, workSample; + byte* soundBuffer; byte deltaSoundBuffer[1024]; int16 soundBuffer2[16]; byte deltaType, type; @@ -159,6 +159,15 @@ void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCou if (soundEnergyArray) soundEnergyArray->clear(); + if (soundDecoderData) { + soundBuffer = soundDecoderData->_soundBuffer; + prevSample = soundDecoderData->_prevSample; + } else { + soundBuffer = new byte[1025]; + memset(soundBuffer, 0x80, 1025); + prevSample = 0; + } + while (chunkCount--) { deltaType = (*source) >> 6; workChunkSize = chunkSize; @@ -228,11 +237,16 @@ void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCou break; default: - return; + return; } if (deltaType > 0) { + // NB: The original did not add this extra value at the end (as far + // as I can tell), and so technically read past the filled part of + // soundBuffer. + soundBuffer[workChunkSize] = soundBuffer[workChunkSize - 1]; + if (deltaType == 1) { for (i = 0; i < chunkSize - 1; i += 2) { l = i / 2; @@ -255,9 +269,13 @@ void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCou prevSample = workSample; memcpy(dest, soundBuffer, chunkSize); dest += chunkSize; - } + if (soundDecoderData) { + soundDecoderData->_prevSample = prevSample; + } else { + delete[] soundBuffer; + } } } // End of namespace Made |