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Ensures reuse of offset buffers.

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There seems to be some sort of epic race condition as the drawing pipeline lags though. Will need to investigate.
This commit is contained in:
Thomas Harte 2020-09-01 22:11:48 -04:00
parent 15296e43a4
commit c36247b609
1 changed files with 22 additions and 12 deletions
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34
OSBindings/Mac/Clock Signal/ScanTarget/CSScanTarget.mm
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@ -680,11 +680,16 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
[encoder endEncoding];
}
- (void)dispatchComputeCommandEncoder:(id<MTLComputeCommandEncoder>)encoder pipelineState:(id<MTLComputePipelineState>)pipelineState width:(NSUInteger)width height:(NSUInteger)height offset:(size_t)offset {
- (id<MTLBuffer>)bufferForOffset:(size_t)offset {
// Store and apply the offset.
const auto buffer = _lineOffsetBuffers[_lineOffsetBuffer];
*(reinterpret_cast<int *>(_lineOffsetBuffers[_lineOffsetBuffer].contents)) = int(offset);
[encoder setBuffer:_lineOffsetBuffers[_lineOffsetBuffer] offset:0 atIndex:1];
_lineOffsetBuffer = (_lineOffsetBuffer + 1) % NumBufferedLines;
return buffer;
}
- (void)dispatchComputeCommandEncoder:(id<MTLComputeCommandEncoder>)encoder pipelineState:(id<MTLComputePipelineState>)pipelineState width:(NSUInteger)width height:(NSUInteger)height offsetBuffer:(id<MTLBuffer>)offsetBuffer {
[encoder setBuffer:offsetBuffer offset:0 atIndex:1];
// This follows the recommendations at https://developer.apple.com/documentation/metal/calculating_threadgroup_and_grid_sizes ;
// I currently have no independent opinion whatsoever.
@ -769,44 +774,49 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
[computeEncoder setBuffer:_uniformsBuffer offset:0 atIndex:0];
if(outputArea.end.line > outputArea.start.line) {
[self dispatchComputeCommandEncoder:computeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line - outputArea.start.line offset:outputArea.start.line];
[self dispatchComputeCommandEncoder:computeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line - outputArea.start.line offsetBuffer:[self bufferForOffset:outputArea.start.line]];
} else {
[self dispatchComputeCommandEncoder:computeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:NumBufferedLines - outputArea.start.line offset:outputArea.start.line];
[self dispatchComputeCommandEncoder:computeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:NumBufferedLines - outputArea.start.line offsetBuffer:[self bufferForOffset:outputArea.start.line]];
if(outputArea.end.line) {
[self dispatchComputeCommandEncoder:computeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line offset:0];
[self dispatchComputeCommandEncoder:computeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line offsetBuffer:[self bufferForOffset:0]];
}
}
[computeEncoder endEncoding];
} else {
// Separate luma and then filter.
// Separate luminance.
id<MTLComputeCommandEncoder> separateComputeEncoder = [commandBuffer computeCommandEncoder];
[separateComputeEncoder setTexture:_compositionTexture atIndex:0];
[separateComputeEncoder setTexture:_separatedLumaTexture atIndex:1];
[separateComputeEncoder setBuffer:_uniformsBuffer offset:0 atIndex:0];
__unsafe_unretained id<MTLBuffer> offsetBuffers[2] = {nil, nil};
offsetBuffers[0] = [self bufferForOffset:outputArea.start.line];
if(outputArea.end.line > outputArea.start.line) {
[self dispatchComputeCommandEncoder:separateComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line - outputArea.start.line offset:outputArea.start.line];
[self dispatchComputeCommandEncoder:separateComputeEncoder pipelineState:_separatedLumaState width:_lineBufferPixelsPerLine height:outputArea.end.line - outputArea.start.line offsetBuffer:offsetBuffers[0]];
} else {
[self dispatchComputeCommandEncoder:separateComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:NumBufferedLines - outputArea.start.line offset:outputArea.start.line];
[self dispatchComputeCommandEncoder:separateComputeEncoder pipelineState:_separatedLumaState width:_lineBufferPixelsPerLine height:NumBufferedLines - outputArea.start.line offsetBuffer:offsetBuffers[0]];
if(outputArea.end.line) {
[self dispatchComputeCommandEncoder:separateComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line offset:0];
offsetBuffers[1] = [self bufferForOffset:0];
[self dispatchComputeCommandEncoder:separateComputeEncoder pipelineState:_separatedLumaState width:_lineBufferPixelsPerLine height:outputArea.end.line offsetBuffer:offsetBuffers[1]];
}
}
[separateComputeEncoder endEncoding];
// Filter resulting chrominance.
id<MTLComputeCommandEncoder> filterComputeEncoder = [commandBuffer computeCommandEncoder];
[filterComputeEncoder setTexture:_separatedLumaTexture atIndex:0];
[filterComputeEncoder setTexture:_finalisedLineTexture atIndex:1];
[filterComputeEncoder setBuffer:_uniformsBuffer offset:0 atIndex:0];
if(outputArea.end.line > outputArea.start.line) {
[self dispatchComputeCommandEncoder:filterComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line - outputArea.start.line offset:outputArea.start.line];
[self dispatchComputeCommandEncoder:filterComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line - outputArea.start.line offsetBuffer:offsetBuffers[0]];
} else {
[self dispatchComputeCommandEncoder:filterComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:NumBufferedLines - outputArea.start.line offset:outputArea.start.line];
[self dispatchComputeCommandEncoder:filterComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:NumBufferedLines - outputArea.start.line offsetBuffer:offsetBuffers[0]];
if(outputArea.end.line) {
[self dispatchComputeCommandEncoder:filterComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line offset:0];
[self dispatchComputeCommandEncoder:filterComputeEncoder pipelineState:_finalisedLineState width:_lineBufferPixelsPerLine height:outputArea.end.line offsetBuffer:offsetBuffers[1]];
}
}