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author | Colin Snover | 2017-02-21 15:11:12 -0600 |
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committer | Colin Snover | 2017-04-22 19:38:12 -0500 |
commit | 5231541e7ca5fa74da01d6c60f46f51ff10b3d78 (patch) | |
tree | 7d99a8a49346e0328bf58d6c19f55a9dd4fa7c90 /engines | |
parent | f6c4e0c7c7278d643cd723cebae812d2894e27c1 (diff) | |
download | scummvm-rg350-5231541e7ca5fa74da01d6c60f46f51ff10b3d78.tar.gz scummvm-rg350-5231541e7ca5fa74da01d6c60f46f51ff10b3d78.tar.bz2 scummvm-rg350-5231541e7ca5fa74da01d6c60f46f51ff10b3d78.zip |
SCI32: Add and divide instead of performing two divisions
This should make things trivially faster, and matches more
accurately how the original engine worked.
Diffstat (limited to 'engines')
-rw-r--r-- | engines/sci/video/robot_decoder.cpp | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/engines/sci/video/robot_decoder.cpp b/engines/sci/video/robot_decoder.cpp index 0cb4831159..d052929eeb 100644 --- a/engines/sci/video/robot_decoder.cpp +++ b/engines/sci/video/robot_decoder.cpp @@ -134,7 +134,7 @@ bool RobotAudioStream::addPacket(const RobotAudioPacket &packet) { return true; } - const int32 packetEndByte = packet.position + (packet.dataSize * sizeof(int16) * kEOSExpansion); + const int32 packetEndByte = packet.position + (packet.dataSize * (sizeof(int16) + kEOSExpansion)); // Already read all the way past this packet (or already wrote valid samples // to this channel all the way past this packet), so discard it @@ -228,12 +228,12 @@ void RobotAudioStream::fillRobotBuffer(const RobotAudioPacket &packet, const int targetBytePosition = _jointMin[bufferIndex] % _loopBufferSize; if (targetBytePosition >= packetEndByte) { numBytesToEnd = _loopBufferSize - targetBytePosition; - interpolateChannel((int16 *)(_loopBuffer + targetBytePosition), numBytesToEnd / sizeof(int16) / kEOSExpansion, 0); + interpolateChannel((int16 *)(_loopBuffer + targetBytePosition), numBytesToEnd / (sizeof(int16) + kEOSExpansion), 0); targetBytePosition = bufferIndex ? 2 : 0; } numBytesToEnd = packetEndByte - targetBytePosition; if (numBytesToEnd > 0) { - interpolateChannel((int16 *)(_loopBuffer + targetBytePosition), numBytesToEnd / sizeof(int16) / kEOSExpansion, 0); + interpolateChannel((int16 *)(_loopBuffer + targetBytePosition), numBytesToEnd / (sizeof(int16) + kEOSExpansion), 0); } } @@ -246,13 +246,13 @@ void RobotAudioStream::fillRobotBuffer(const RobotAudioPacket &packet, const int copyEveryOtherSample((int16 *)(_loopBuffer + targetBytePosition), (int16 *)(_decompressionBuffer + sourceByte), numBytesToEnd / kEOSExpansion); targetBytePosition = bufferIndex ? 2 : 0; } - copyEveryOtherSample((int16 *)(_loopBuffer + targetBytePosition), (int16 *)(_decompressionBuffer + sourceByte + numBytesToEnd), (packetEndByte - targetBytePosition) / sizeof(int16) / kEOSExpansion); + copyEveryOtherSample((int16 *)(_loopBuffer + targetBytePosition), (int16 *)(_decompressionBuffer + sourceByte + numBytesToEnd), (packetEndByte - targetBytePosition) / (sizeof(int16) + kEOSExpansion)); } _jointMin[bufferIndex] = endByte; } void RobotAudioStream::interpolateMissingSamples(int32 numSamples) { - int32 numBytes = numSamples * sizeof(int16) * kEOSExpansion; + int32 numBytes = numSamples * (sizeof(int16) + kEOSExpansion); int32 targetPosition = _readHead; if (_readHeadAbs > _jointMin[1]) { @@ -268,7 +268,7 @@ void RobotAudioStream::interpolateMissingSamples(int32 numSamples) { _jointMin[1] += numBytes; } else { if (targetPosition + numBytes >= _loopBufferSize) { - const int32 numSamplesToEdge = (_loopBufferSize - targetPosition) / sizeof(int16) / kEOSExpansion; + const int32 numSamplesToEdge = (_loopBufferSize - targetPosition) / (sizeof(int16) + kEOSExpansion); interpolateChannel((int16 *)(_loopBuffer + targetPosition), numSamplesToEdge, 1); numSamples -= numSamplesToEdge; targetPosition = 0; @@ -278,7 +278,7 @@ void RobotAudioStream::interpolateMissingSamples(int32 numSamples) { } } else if (_readHeadAbs > _jointMin[0]) { if (targetPosition + numBytes >= _loopBufferSize) { - const int32 numSamplesToEdge = (_loopBufferSize - targetPosition) / sizeof(int16) / kEOSExpansion; + const int32 numSamplesToEdge = (_loopBufferSize - targetPosition) / (sizeof(int16) + kEOSExpansion); interpolateChannel((int16 *)(_loopBuffer + targetPosition), numSamplesToEdge, 0); numSamples -= numSamplesToEdge; targetPosition = 2; |