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Refactoring NVDEC decoder

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2025-10-03 10:54:48 +09:00
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vav2/docs/working/NVDECAV1Decoder_CPP_Refactoring_Design.md Normal file
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# NVDECAV1Decoder C++ Refactoring Design
**Date**: 2025-10-03
**Status**: Design Phase
**Goal**: Refactor NVDECAV1Decoder internal C++ code for readability and maintainability
---
## Problem Analysis
### Current State
- **File**: `vav2/platforms/windows/vavcore/src/Decoder/NVDECAV1Decoder.cpp`
- **Lines**: 1,722 lines (too large)
- **Main Method**: `DecodeToSurface()` is 500+ lines with deeply nested logic
### Key Issues
1. **Monolithic Method**: `DecodeToSurface()` handles CPU, D3D11, D3D12, CUDA in one giant function
2. **Mixed Responsibilities**: Decoding + Surface copying + Memory management + Fence signaling all mixed
3. **Hard to Debug**: Pitch/stride bugs are difficult to trace due to complex nesting
4. **Difficult to Test**: Cannot unit test individual components in isolation
5. **Poor Readability**: Excessive debug logging makes logic hard to follow
---
## Design Goals
### Primary Goals
1. **Readability**: Each method should do ONE thing clearly
2. **Maintainability**: Easy to locate and fix bugs (like current NV12 stride issue)
3. **Testability**: Each component can be tested independently
4. **Performance**: Zero overhead - use inline functions where appropriate
### Non-Goals
- NOT creating a C API (VavCore already provides that)
- NOT changing external interface of NVDECAV1Decoder
- NOT over-engineering with complex patterns
---
## Proposed Architecture
### File Structure
```
NVDECAV1Decoder.h (Public interface - unchanged)
NVDECAV1Decoder.cpp (Main decoder - 400 lines)
└── Uses helper classes below
D3D12SurfaceHandler.h (D3D12-specific logic - 300 lines)
D3D12SurfaceHandler.cpp
├── ImportD3D12Resource()
├── CopyNV12Frame()
└── SignalFence()
ExternalMemoryCache.h (CUDA-D3D12 interop cache - 200 lines)
ExternalMemoryCache.cpp
├── GetOrCreate()
├── Release()
└── Clear()
```
### Class Diagram
```
NVDECAV1Decoder (Main decoder)
├── CUvideodecoder m_decoder
├── CUvideoparser m_parser
├── CUcontext m_cudaContext
├── D3D12SurfaceHandler* m_d3d12Handler (on-demand)
└── ExternalMemoryCache* m_memoryCache (on-demand)
D3D12SurfaceHandler
├── ID3D12Device* m_device
├── CUcontext m_cudaContext
├── ExternalMemoryCache* m_cache
└── Methods:
├── CopyNV12Frame(src, dst, width, height, srcPitch)
├── GetD3D12CUDAPointer(ID3D12Resource*)
└── SignalD3D12Fence(value)
ExternalMemoryCache
├── std::map<ID3D12Resource*, CachedEntry>
└── Methods:
├── GetOrCreateExternalMemory(resource)
└── ReleaseAll()
```
---
## Refactored Code Structure
### 1. NVDECAV1Decoder.cpp (Main decoder - simplified)
**Before**: 500+ lines in DecodeToSurface()
**After**: Clean routing logic
```cpp
bool NVDECAV1Decoder::DecodeToSurface(const uint8_t* packet_data, size_t packet_size,
void* target_surface, SurfaceType target_type)
{
// Step 1: Decode packet to NVDEC internal buffer
if (!DecodePacket(packet_data, packet_size)) {
return false;
}
// Step 2: Get decoded frame info
DecodedFrameInfo frame_info;
if (!GetDecodedFrame(&frame_info)) {
return false;
}
// Step 3: Copy to target surface based on type
bool result = false;
switch (target_type) {
case SURFACE_TYPE_CPU:
result = CopyToCPUSurface(frame_info, target_surface);
break;
case SURFACE_TYPE_D3D12:
result = CopyToD3D12Surface(frame_info, target_surface);
break;
case SURFACE_TYPE_D3D11:
result = CopyToD3D11Surface(frame_info, target_surface);
break;
case SURFACE_TYPE_CUDA:
result = CopyToCUDASurface(frame_info, target_surface);
break;
}
// Step 4: Cleanup
cuvidUnmapVideoFrame(m_decoder, frame_info.device_ptr);
return result;
}
```
### 2. Private Helper Methods (in NVDECAV1Decoder.cpp)
```cpp
// Decode packet using cuvidParseVideoData
// Returns: true on success
// Complexity: ~30 lines
private:
bool DecodePacket(const uint8_t* data, size_t size)
{
CUVIDSOURCEDATAPACKET packet = {};
packet.payload = data;
packet.payload_size = size;
packet.flags = CUVID_PKT_TIMESTAMP;
CUresult result = cuvidParseVideoData(m_parser, &packet);
if (result != CUDA_SUCCESS) {
LogError("cuvidParseVideoData failed: %d", result);
return false;
}
return true;
}
// Get decoded frame from internal queue
// Returns: true if frame available
// Complexity: ~40 lines
private:
struct DecodedFrameInfo {
CUdeviceptr device_ptr;
uint32_t pitch;
uint32_t width;
uint32_t height;
};
bool GetDecodedFrame(DecodedFrameInfo* out_info)
{
if (m_frameQueue.empty()) {
return false;
}
int frame_index = m_frameQueue.front();
m_frameQueue.pop();
CUVIDPROCPARAMS proc_params = {};
proc_params.progressive_frame = 1;
CUdeviceptr device_ptr;
unsigned int pitch;
CUresult result = cuvidMapVideoFrame(m_decoder, frame_index,
&device_ptr, &pitch, &proc_params);
if (result != CUDA_SUCCESS) {
LogError("cuvidMapVideoFrame failed: %d", result);
return false;
}
out_info->device_ptr = device_ptr;
out_info->pitch = pitch;
out_info->width = m_width;
out_info->height = m_height;
return true;
}
// Copy to D3D12 surface (delegates to handler)
// Returns: true on success
// Complexity: ~20 lines
private:
bool CopyToD3D12Surface(const DecodedFrameInfo& frame, void* surface)
{
auto* d3d12_resource = static_cast<ID3D12Resource*>(surface);
// Create handler on-demand
if (!m_d3d12Handler) {
m_d3d12Handler = std::make_unique<D3D12SurfaceHandler>(
m_d3d12Device, m_cudaContext
);
}
return m_d3d12Handler->CopyNV12Frame(
frame.device_ptr,
frame.pitch,
d3d12_resource,
frame.width,
frame.height
);
}
```
### 3. D3D12SurfaceHandler.h (D3D12-specific operations)
```cpp
#pragma once
#include <d3d12.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <memory>
namespace VavCore {
// Forward declaration
class ExternalMemoryCache;
class D3D12SurfaceHandler {
public:
D3D12SurfaceHandler(ID3D12Device* device, CUcontext cuda_context);
~D3D12SurfaceHandler();
// Copy NV12 frame from CUDA to D3D12 texture
// Returns: true on success
bool CopyNV12Frame(CUdeviceptr src_frame,
uint32_t src_pitch,
ID3D12Resource* dst_texture,
uint32_t width,
uint32_t height);
// Signal D3D12 fence from CUDA stream
// Returns: true on success
bool SignalD3D12Fence(uint64_t fence_value);
private:
// Get CUDA device pointer for D3D12 resource (uses cache)
bool GetD3D12CUDAPointer(ID3D12Resource* resource, CUdeviceptr* out_ptr);
// Copy Y plane (8-bit single channel)
bool CopyYPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height);
// Copy UV plane (8-bit dual channel, interleaved)
bool CopyUVPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height);
private:
ID3D12Device* m_device;
CUcontext m_cudaContext;
std::unique_ptr<ExternalMemoryCache> m_cache;
};
} // namespace VavCore
```
### 4. D3D12SurfaceHandler.cpp (Implementation)
```cpp
#include "D3D12SurfaceHandler.h"
#include "ExternalMemoryCache.h"
#include <stdio.h>
namespace VavCore {
D3D12SurfaceHandler::D3D12SurfaceHandler(ID3D12Device* device, CUcontext cuda_context)
: m_device(device)
, m_cudaContext(cuda_context)
, m_cache(std::make_unique<ExternalMemoryCache>(device, cuda_context))
{
}
D3D12SurfaceHandler::~D3D12SurfaceHandler()
{
}
bool D3D12SurfaceHandler::CopyNV12Frame(CUdeviceptr src_frame,
uint32_t src_pitch,
ID3D12Resource* dst_texture,
uint32_t width,
uint32_t height)
{
// Get CUDA pointer for D3D12 resource
CUdeviceptr dst_ptr = 0;
if (!GetD3D12CUDAPointer(dst_texture, &dst_ptr)) {
return false;
}
// Get D3D12 texture layout
D3D12_RESOURCE_DESC desc = dst_texture->GetDesc();
D3D12_PLACED_SUBRESOURCE_FOOTPRINT layouts[2];
UINT num_rows[2] = {0};
UINT64 row_sizes[2] = {0};
UINT64 total_bytes = 0;
m_device->GetCopyableFootprints(&desc, 0, 2, 0,
layouts, num_rows, row_sizes, &total_bytes);
// Copy Y plane
if (!CopyYPlane(src_frame, src_pitch,
dst_ptr, layouts[0].Footprint.RowPitch,
width, height)) {
return false;
}
// Copy UV plane
CUdeviceptr src_uv = src_frame + (src_pitch * height);
CUdeviceptr dst_uv = dst_ptr + layouts[1].Offset;
if (!CopyUVPlane(src_uv, src_pitch,
dst_uv, layouts[1].Footprint.RowPitch,
width, height / 2)) {
return false;
}
return true;
}
bool D3D12SurfaceHandler::GetD3D12CUDAPointer(ID3D12Resource* resource,
CUdeviceptr* out_ptr)
{
return m_cache->GetOrCreateExternalMemory(resource, out_ptr);
}
bool D3D12SurfaceHandler::CopyYPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height)
{
cudaError_t err = cudaMemcpy2D(
(void*)dst, dst_pitch,
(void*)src, src_pitch,
width, height, // Copy only valid pixels, not padding
cudaMemcpyDeviceToDevice
);
if (err != cudaSuccess) {
printf("[D3D12] Y plane copy failed: %d\n", err);
return false;
}
return true;
}
bool D3D12SurfaceHandler::CopyUVPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height)
{
// NV12 UV plane: interleaved U and V, so width in bytes = width of Y plane
cudaError_t err = cudaMemcpy2D(
(void*)dst, dst_pitch,
(void*)src, src_pitch,
width, height, // UV plane has same width in bytes, half height
cudaMemcpyDeviceToDevice
);
if (err != cudaSuccess) {
printf("[D3D12] UV plane copy failed: %d\n", err);
return false;
}
return true;
}
} // namespace VavCore
```
### 5. ExternalMemoryCache.h (CUDA-D3D12 interop cache)
```cpp
#pragma once
#include <d3d12.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <map>
namespace VavCore {
class ExternalMemoryCache {
public:
ExternalMemoryCache(ID3D12Device* device, CUcontext cuda_context);
~ExternalMemoryCache();
// Get or create CUDA device pointer for D3D12 resource
// Returns: true on success
bool GetOrCreateExternalMemory(ID3D12Resource* resource, CUdeviceptr* out_ptr);
// Release specific resource
void Release(ID3D12Resource* resource);
// Release all cached resources
void ReleaseAll();
private:
struct CachedEntry {
cudaExternalMemory_t external_memory;
CUdeviceptr device_ptr;
size_t size;
};
bool ImportD3D12Resource(ID3D12Resource* resource,
cudaExternalMemory_t* out_ext_mem,
CUdeviceptr* out_ptr);
private:
ID3D12Device* m_device;
CUcontext m_cudaContext;
std::map<ID3D12Resource*, CachedEntry> m_cache;
};
} // namespace VavCore
```
---
## Key Improvements
### Readability
**Before**:
- `DecodeToSurface()`: 500+ lines with 5 levels of nesting
- Mixed concerns: decoding, copying, caching, signaling
**After**:
- `DecodeToSurface()`: 40 lines, clear 4-step process
- Each helper method: 20-60 lines, single responsibility
### Debugging
**Before**:
- NV12 stride bug hidden in 500 lines of mixed logic
- Hard to locate which `cudaMemcpy2D` call is wrong
**After**:
- `CopyYPlane()` and `CopyUVPlane()` are separate methods
- Easy to add breakpoint and inspect parameters
- Clear separation of Y and UV plane logic
### Testing
**Before**:
- Cannot test D3D12 copying without full decoder setup
- Cannot mock CUDA operations
**After**:
- Can unit test `D3D12SurfaceHandler` independently
- Can test `ExternalMemoryCache` in isolation
- Easy to add mock implementations
### Maintenance
**Before**:
- Adding D3D11 support requires modifying 500+ line method
- Risk of breaking existing D3D12 code
**After**:
- Add new `D3D11SurfaceHandler` class
- Existing D3D12 code untouched
- Clean separation of concerns
---
## File Size Comparison
| File | Before | After |
|------|--------|-------|
| NVDECAV1Decoder.cpp | 1,722 lines | ~600 lines |
| D3D12SurfaceHandler.cpp | - | ~300 lines |
| ExternalMemoryCache.cpp | - | ~200 lines |
| **Total** | 1,722 lines | 1,100 lines |
**Reduction**: 36% code reduction while improving readability
---
## Implementation Plan
### Phase 1: Extract D3D12 Handler (2-3 hours)
1. Create `D3D12SurfaceHandler.h/.cpp`
2. Move D3D12 resource import logic
3. Move NV12 plane copying logic
4. Test with existing Vav2Player
**Acceptance Criteria**:
- Vav2Player displays video correctly
- No memory leaks
- Performance same or better
### Phase 2: Extract External Memory Cache (1-2 hours)
1. Create `ExternalMemoryCache.h/.cpp`
2. Move external memory caching logic
3. Add proper cleanup on resource release
4. Test memory management
**Acceptance Criteria**:
- Cache hit/miss working correctly
- No memory leaks on repeated loads
- Cache cleared on decoder cleanup
### Phase 3: Refactor Main Decoder (1-2 hours)
1. Simplify `DecodeToSurface()` to routing logic
2. Extract `DecodePacket()` method
3. Extract `GetDecodedFrame()` method
4. Extract `CopyToCPUSurface()` method
5. Test all surface types
**Acceptance Criteria**:
- All surface types working
- Code passes all existing tests
- Debug logging reduced
### Phase 4: Fix NV12 Stride Bug (30 minutes)
1. Fix `CopyYPlane()` width parameter
2. Fix `CopyUVPlane()` width parameter
3. Verify with test video
**Acceptance Criteria**:
- No stripe pattern in displayed video
- Correct colors displayed
- Performance maintained
---
## Testing Strategy
### Unit Tests
```cpp
TEST(D3D12SurfaceHandler, CopiesNV12FrameCorrectly)
{
auto handler = CreateTestHandler();
auto src_frame = CreateTestNV12Frame(1920, 1080);
auto dst_texture = CreateTestD3D12Texture(1920, 1080);
bool result = handler->CopyNV12Frame(
src_frame.device_ptr, src_frame.pitch,
dst_texture, 1920, 1080
);
EXPECT_TRUE(result);
VerifyNV12Data(dst_texture);
}
TEST(ExternalMemoryCache, ReusesExistingEntry)
{
auto cache = CreateTestCache();
auto resource = CreateTestD3D12Resource();
CUdeviceptr ptr1, ptr2;
cache->GetOrCreateExternalMemory(resource, &ptr1);
cache->GetOrCreateExternalMemory(resource, &ptr2);
EXPECT_EQ(ptr1, ptr2); // Should return same pointer
}
```
### Integration Tests
- Load video file
- Decode multiple frames
- Verify no memory leaks
- Verify correct video display
---
## Success Criteria
- [x] Design document complete
- [ ] Phase 1 complete: D3D12SurfaceHandler working
- [ ] Phase 2 complete: ExternalMemoryCache working
- [ ] Phase 3 complete: Main decoder simplified
- [ ] Phase 4 complete: NV12 stripe bug fixed
- [ ] All existing tests passing
- [ ] No performance regression
- [ ] Code review passed
- [ ] Documentation updated
---
**Next Step**: Start Phase 1 - Extract D3D12SurfaceHandler
**Last Updated**: 2025-10-03

4
vav2/platforms/windows/vavcore/VavCore.vcxproj
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@@ -125,6 +125,8 @@
<ClInclude Include="src\Decoder\AdaptiveAV1Decoder.h" />
<ClInclude Include="src\Decoder\AdaptiveNVDECDecoder.h" />
<ClInclude Include="src\Decoder\NVDECAV1Decoder.h" />
<ClInclude Include="src\Decoder\D3D12SurfaceHandler.h" />
<ClInclude Include="src\Decoder\ExternalMemoryCache.h" />
<ClInclude Include="src\Decoder\MediaFoundationAV1Decoder.h" />
<ClInclude Include="src\Decoder\AMFAV1Decoder.h" />
<ClInclude Include="src\Decoder\VPLAV1Decoder.h" />
@@ -143,6 +145,8 @@
<ClCompile Include="src\Decoder\AdaptiveAV1Decoder.cpp" />
<ClCompile Include="src\Decoder\AdaptiveNVDECDecoder.cpp" />
<ClCompile Include="src\Decoder\NVDECAV1Decoder.cpp" />
<ClCompile Include="src\Decoder\D3D12SurfaceHandler.cpp" />
<ClCompile Include="src\Decoder\ExternalMemoryCache.cpp" />
<ClCompile Include="src\Decoder\MediaFoundationAV1Decoder.cpp" />
<ClCompile Include="src\Decoder\AMFAV1Decoder.cpp" />
<ClCompile Include="src\Decoder\VPLAV1Decoder.cpp" />

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vav2/platforms/windows/vavcore/src/Decoder/D3D12SurfaceHandler.cpp Normal file
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#include "pch.h"
#include "D3D12SurfaceHandler.h"
#include "ExternalMemoryCache.h"
#include <stdio.h>
namespace VavCore {
D3D12SurfaceHandler::D3D12SurfaceHandler(ID3D12Device* device, CUcontext cuda_context)
: m_device(device)
, m_cudaContext(cuda_context)
, m_cache(std::make_unique<ExternalMemoryCache>(device, cuda_context))
{
OutputDebugStringA("[D3D12SurfaceHandler] Created\n");
}
D3D12SurfaceHandler::~D3D12SurfaceHandler()
{
OutputDebugStringA("[D3D12SurfaceHandler] Destroyed\n");
}
bool D3D12SurfaceHandler::CopyNV12Frame(CUdeviceptr src_frame,
uint32_t src_pitch,
ID3D12Resource* dst_texture,
uint32_t width,
uint32_t height)
{
// Get CUDA pointer for D3D12 resource
CUdeviceptr dst_ptr = 0;
if (!GetD3D12CUDAPointer(dst_texture, &dst_ptr)) {
OutputDebugStringA("[D3D12SurfaceHandler] Failed to get CUDA pointer for D3D12 resource\n");
return false;
}
// Get D3D12 texture layout for both Y and UV planes
D3D12_RESOURCE_DESC desc = dst_texture->GetDesc();
D3D12_PLACED_SUBRESOURCE_FOOTPRINT layouts[2];
UINT num_rows[2] = {0};
UINT64 row_sizes[2] = {0};
UINT64 total_bytes = 0;
// CRITICAL: Use actual video height, not texture allocation height
// Texture was allocated with height * 1.5 for NV12 layout, but GetCopyableFootprints
// should use actual video height to calculate correct plane offsets
D3D12_RESOURCE_DESC actual_video_desc = desc;
actual_video_desc.Height = height; // Use actual video height, not allocation height
// CRITICAL: Query BOTH subresources in a SINGLE call to get correct relative offsets
// NV12 has 2 subresources (plane 0: Y, plane 1: UV)
m_device->GetCopyableFootprints(&actual_video_desc, 0, 2, 0,
layouts, num_rows, row_sizes, &total_bytes);
uint32_t y_dst_pitch = layouts[0].Footprint.RowPitch;
uint32_t uv_dst_pitch = layouts[1].Footprint.RowPitch;
UINT64 uv_offset = layouts[1].Offset;
char buf[512];
sprintf_s(buf, "[D3D12SurfaceHandler] Y: width=%u, height=%u, srcPitch=%u, dstPitch=%u\n",
width, height, src_pitch, y_dst_pitch);
OutputDebugStringA(buf);
sprintf_s(buf, "[D3D12SurfaceHandler] UV: width=%u, height=%u, srcPitch=%u, dstPitch=%u, offset=%llu\n",
width, height / 2, src_pitch, uv_dst_pitch, uv_offset);
OutputDebugStringA(buf);
// Copy Y plane
if (!CopyYPlane(src_frame, src_pitch,
dst_ptr, y_dst_pitch,
width, height)) {
return false;
}
// Copy UV plane
CUdeviceptr src_uv = src_frame + (src_pitch * height);
CUdeviceptr dst_uv = dst_ptr + uv_offset;
if (!CopyUVPlane(src_uv, src_pitch,
dst_uv, uv_dst_pitch,
width, height / 2)) {
return false;
}
OutputDebugStringA("[D3D12SurfaceHandler] NV12 frame copied successfully\n");
return true;
}
bool D3D12SurfaceHandler::SignalD3D12Fence(uint64_t fence_value)
{
// TODO: Implement fence signaling
OutputDebugStringA("[D3D12SurfaceHandler] Fence signaling not implemented\n");
return true;
}
bool D3D12SurfaceHandler::GetD3D12CUDAPointer(ID3D12Resource* resource, CUdeviceptr* out_ptr)
{
return m_cache->GetOrCreateExternalMemory(resource, out_ptr);
}
bool D3D12SurfaceHandler::CopyYPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height)
{
// Copy Y plane: single 8-bit channel
// Width parameter is in bytes (same as pixel width for 8-bit format)
cudaError_t err = cudaMemcpy2D(
(void*)dst, dst_pitch,
(void*)src, src_pitch,
width, height,
cudaMemcpyDeviceToDevice
);
if (err != cudaSuccess) {
char buf[256];
sprintf_s(buf, "[D3D12SurfaceHandler] Y plane copy failed: %d (%s)\n",
err, cudaGetErrorString(err));
OutputDebugStringA(buf);
return false;
}
OutputDebugStringA("[D3D12SurfaceHandler] Y plane copied\n");
return true;
}
bool D3D12SurfaceHandler::CopyUVPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height)
{
// Copy UV plane: interleaved U and V (NV12 format)
// Width in bytes = width of Y plane (because U and V are interleaved)
// Height = half of Y plane height
cudaError_t err = cudaMemcpy2D(
(void*)dst, dst_pitch,
(void*)src, src_pitch,
width, height,
cudaMemcpyDeviceToDevice
);
if (err != cudaSuccess) {
char buf[256];
sprintf_s(buf, "[D3D12SurfaceHandler] UV plane copy failed: %d (%s)\n",
err, cudaGetErrorString(err));
OutputDebugStringA(buf);
return false;
}
OutputDebugStringA("[D3D12SurfaceHandler] UV plane copied\n");
return true;
}
} // namespace VavCore

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vav2/platforms/windows/vavcore/src/Decoder/D3D12SurfaceHandler.h Normal file
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#pragma once
#include <d3d12.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <memory>
namespace VavCore {
// Forward declaration
class ExternalMemoryCache;
// Handler for D3D12 surface operations
// Manages CUDA-D3D12 interop and NV12 frame copying
class D3D12SurfaceHandler {
public:
D3D12SurfaceHandler(ID3D12Device* device, CUcontext cuda_context);
~D3D12SurfaceHandler();
// Copy NV12 frame from CUDA to D3D12 texture
// Returns true on success
bool CopyNV12Frame(CUdeviceptr src_frame,
uint32_t src_pitch,
ID3D12Resource* dst_texture,
uint32_t width,
uint32_t height);
// Signal D3D12 fence from CUDA stream (not implemented yet)
bool SignalD3D12Fence(uint64_t fence_value);
private:
// Get CUDA device pointer for D3D12 resource (uses cache)
bool GetD3D12CUDAPointer(ID3D12Resource* resource, CUdeviceptr* out_ptr);
// Copy Y plane (8-bit single channel)
bool CopyYPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height);
// Copy UV plane (8-bit dual channel, interleaved)
bool CopyUVPlane(CUdeviceptr src, uint32_t src_pitch,
CUdeviceptr dst, uint32_t dst_pitch,
uint32_t width, uint32_t height);
private:
ID3D12Device* m_device;
CUcontext m_cudaContext;
std::unique_ptr<ExternalMemoryCache> m_cache;
};
} // namespace VavCore

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vav2/platforms/windows/vavcore/src/Decoder/ExternalMemoryCache.cpp Normal file
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#include "pch.h"
#include "ExternalMemoryCache.h"
#include <windows.h>
#include <stdio.h>
namespace VavCore {
ExternalMemoryCache::ExternalMemoryCache(ID3D12Device* device, CUcontext cuda_context)
: m_device(device)
, m_cudaContext(cuda_context)
{
}
ExternalMemoryCache::~ExternalMemoryCache()
{
ReleaseAll();
}
bool ExternalMemoryCache::GetOrCreateExternalMemory(ID3D12Resource* resource, CUdeviceptr* out_ptr)
{
if (!resource || !out_ptr) {
return false;
}
// Check cache first
auto it = m_cache.find(resource);
if (it != m_cache.end()) {
*out_ptr = it->second.device_ptr;
return true;
}
// Not in cache, import resource
cudaExternalMemory_t external_memory;
CUdeviceptr device_ptr;
if (!ImportD3D12Resource(resource, &external_memory, &device_ptr)) {
return false;
}
// Add to cache
CachedEntry entry;
entry.external_memory = external_memory;
entry.device_ptr = device_ptr;
entry.size = 0; // Size is stored but not used currently
m_cache[resource] = entry;
*out_ptr = device_ptr;
OutputDebugStringA("[ExternalMemoryCache] New resource cached\n");
return true;
}
void ExternalMemoryCache::Release(ID3D12Resource* resource)
{
auto it = m_cache.find(resource);
if (it == m_cache.end()) {
return;
}
// Destroy external memory
cudaDestroyExternalMemory(it->second.external_memory);
m_cache.erase(it);
OutputDebugStringA("[ExternalMemoryCache] Resource released\n");
}
void ExternalMemoryCache::ReleaseAll()
{
for (auto& pair : m_cache) {
cudaDestroyExternalMemory(pair.second.external_memory);
}
m_cache.clear();
OutputDebugStringA("[ExternalMemoryCache] All resources released\n");
}
bool ExternalMemoryCache::ImportD3D12Resource(ID3D12Resource* resource,
cudaExternalMemory_t* out_ext_mem,
CUdeviceptr* out_ptr)
{
// Create shared handle for D3D12 resource
HANDLE shared_handle = nullptr;
HRESULT hr = m_device->CreateSharedHandle(resource, nullptr, GENERIC_ALL, nullptr, &shared_handle);
if (FAILED(hr)) {
char buf[256];
sprintf_s(buf, "[ExternalMemoryCache] CreateSharedHandle failed: 0x%08X\n", hr);
OutputDebugStringA(buf);
return false;
}
// Get resource allocation size
D3D12_RESOURCE_DESC desc = resource->GetDesc();
D3D12_RESOURCE_ALLOCATION_INFO alloc_info = m_device->GetResourceAllocationInfo(0, 1, &desc);
// Import external memory
cudaExternalMemoryHandleDesc mem_desc = {};
mem_desc.type = cudaExternalMemoryHandleTypeD3D12Heap; // Use heap type for shared resources
mem_desc.handle.win32.handle = shared_handle;
mem_desc.handle.win32.name = nullptr; // No name for unnamed shared handle
mem_desc.size = alloc_info.SizeInBytes;
mem_desc.flags = cudaExternalMemoryDedicated; // Mark as dedicated allocation
cudaExternalMemory_t external_memory;
cudaError_t err = cudaImportExternalMemory(&external_memory, &mem_desc);
CloseHandle(shared_handle);
if (err != cudaSuccess) {
char buf[512];
sprintf_s(buf, "[ExternalMemoryCache] cudaImportExternalMemory failed: %d (%s)\n"
" type=%d, handle=%p, size=%llu, flags=%u\n",
err, cudaGetErrorString(err),
mem_desc.type, mem_desc.handle.win32.handle, mem_desc.size, mem_desc.flags);
OutputDebugStringA(buf);
return false;
}
// Map to device pointer
cudaExternalMemoryBufferDesc buffer_desc = {};
buffer_desc.size = mem_desc.size;
CUdeviceptr device_ptr;
err = cudaExternalMemoryGetMappedBuffer((void**)&device_ptr, external_memory, &buffer_desc);
if (err != cudaSuccess) {
char buf[256];
sprintf_s(buf, "[ExternalMemoryCache] cudaExternalMemoryGetMappedBuffer failed: %d\n", err);
OutputDebugStringA(buf);
cudaDestroyExternalMemory(external_memory);
return false;
}
*out_ext_mem = external_memory;
*out_ptr = device_ptr;
return true;
}
} // namespace VavCore

48
vav2/platforms/windows/vavcore/src/Decoder/ExternalMemoryCache.h Normal file
View File

@@ -0,0 +1,48 @@
#pragma once
#include <d3d12.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <map>
namespace VavCore {
// Cache for CUDA-D3D12 interop external memory
// Manages cudaExternalMemory_t objects and their associated CUDA device pointers
class ExternalMemoryCache {
public:
ExternalMemoryCache(ID3D12Device* device, CUcontext cuda_context);
~ExternalMemoryCache();
// Get or create CUDA device pointer for D3D12 resource
// Returns true on success, false on failure
bool GetOrCreateExternalMemory(ID3D12Resource* resource, CUdeviceptr* out_ptr);
// Release specific resource from cache
void Release(ID3D12Resource* resource);
// Release all cached resources
void ReleaseAll();
// Get cache size
size_t GetCacheSize() const { return m_cache.size(); }
private:
struct CachedEntry {
cudaExternalMemory_t external_memory;
CUdeviceptr device_ptr;
size_t size;
};
// Import D3D12 resource as CUDA external memory
bool ImportD3D12Resource(ID3D12Resource* resource,
cudaExternalMemory_t* out_ext_mem,
CUdeviceptr* out_ptr);
private:
ID3D12Device* m_device;
CUcontext m_cudaContext;
std::map<ID3D12Resource*, CachedEntry> m_cache;
};
} // namespace VavCore

342
vav2/platforms/windows/vavcore/src/Decoder/NVDECAV1Decoder.cpp
View File

@@ -18,6 +18,7 @@
// 3rd: User defined
#include "NVDECAV1Decoder.h"
#include "D3D12SurfaceHandler.h"
#include "VideoDecoderFactory.h"
const char* g_deinterleave_kernel_ptx = R"PTX(
@@ -183,14 +184,9 @@ bool NVDECAV1Decoder::Initialize(const VideoMetadata& metadata) {
}
void NVDECAV1Decoder::Cleanup() {
// Clean up cached external memory
if (m_cachedExternalMemory != nullptr) {
OutputDebugStringA("[NVDECAV1Decoder::Cleanup] Destroying cached external memory\n");
cudaDestroyExternalMemory(m_cachedExternalMemory);
m_cachedExternalMemory = nullptr;
m_cachedDevicePtr = nullptr;
m_cachedD3D12Resource = nullptr;
}
// Clean up D3D12 surface handler (releases all cached external memory)
m_d3d12Handler.reset();
OutputDebugStringA("[NVDECAV1Decoder::Cleanup] D3D12SurfaceHandler released\n");
// Clean up D3D12 synchronization objects
if (m_cudaSemaphore != nullptr) {
@@ -1165,7 +1161,7 @@ bool NVDECAV1Decoder::DecodeToSurface(const uint8_t* packet_data, size_t packet_
output_frame.frame_index = m_framesDecoded;
output_frame.timestamp_seconds = static_cast<double>(m_framesDecoded) / 30.0;
} else if (target_type == VAVCORE_SURFACE_D3D12_RESOURCE) {
// D3D12 resource path using CUDA External Memory API
// D3D12 resource path using D3D12SurfaceHandler
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] D3D12 resource path\n");
if (!target_surface || !m_d3d12Device) {
@@ -1174,107 +1170,14 @@ bool NVDECAV1Decoder::DecodeToSurface(const uint8_t* packet_data, size_t packet_
return false;
}
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] target_surface=%p, m_d3d12Device=%p\n",
target_surface, m_d3d12Device);
OutputDebugStringA(debug_buf);
// Cast target_surface to ID3D12Resource*
ID3D12Resource* d3d12Resource = static_cast<ID3D12Resource*>(target_surface);
// Check if we can reuse cached external memory
cudaExternalMemory_t externalMemory = nullptr;
void* devicePtr = nullptr;
HANDLE sharedHandle = nullptr;
ID3D12Device* device = static_cast<ID3D12Device*>(m_d3d12Device);
D3D12_RESOURCE_DESC d3d12Desc = d3d12Resource->GetDesc();
D3D12_RESOURCE_ALLOCATION_INFO allocInfo = device->GetResourceAllocationInfo(0, 1, &d3d12Desc);
if (m_cachedD3D12Resource == d3d12Resource && m_cachedExternalMemory != nullptr && m_cachedDevicePtr != nullptr) {
// Reuse cached external memory
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Reusing cached external memory (resource=%p)\n", d3d12Resource);
OutputDebugStringA(debug_buf);
externalMemory = m_cachedExternalMemory;
devicePtr = m_cachedDevicePtr;
} else {
// Create new external memory import
if (m_cachedExternalMemory != nullptr) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Resource changed (%p -> %p), destroying old external memory\n",
m_cachedD3D12Resource, d3d12Resource);
OutputDebugStringA(debug_buf);
// Clean up old external memory
cudaDestroyExternalMemory(m_cachedExternalMemory);
m_cachedExternalMemory = nullptr;
m_cachedDevicePtr = nullptr;
m_cachedD3D12Resource = nullptr;
}
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Creating new external memory import...\n");
// Get Windows shared handle for D3D12 resource
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Getting shared handle for D3D12 resource...\n");
HRESULT hr = device->CreateSharedHandle(d3d12Resource, nullptr, GENERIC_ALL, nullptr, &sharedHandle);
if (FAILED(hr)) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] CreateSharedHandle failed with HRESULT 0x%08X\n", hr);
OutputDebugStringA(debug_buf);
return false;
}
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Shared handle created: %p\n", sharedHandle);
OutputDebugStringA(debug_buf);
// Import D3D12 resource as CUDA external memory using CUDA Runtime API
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Importing D3D12 resource as CUDA external memory...\n");
cudaExternalMemoryHandleDesc externalMemoryHandleDesc = {};
externalMemoryHandleDesc.type = cudaExternalMemoryHandleTypeD3D12Heap; // Use heap type for shared resources
externalMemoryHandleDesc.handle.win32.handle = sharedHandle;
externalMemoryHandleDesc.handle.win32.name = nullptr; // No name for unnamed shared handle
externalMemoryHandleDesc.size = allocInfo.SizeInBytes; // Use actual D3D12 allocation size
externalMemoryHandleDesc.flags = cudaExternalMemoryDedicated; // Mark as dedicated allocation
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] D3D12 allocation size: %llu bytes (vs naive %u bytes)\n",
allocInfo.SizeInBytes, m_width * (m_height + m_height / 2));
OutputDebugStringA(debug_buf);
cudaError_t cudaStatus = cudaImportExternalMemory(&externalMemory, &externalMemoryHandleDesc);
if (cudaStatus != cudaSuccess) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cudaImportExternalMemory failed with code %d: %s\n",
cudaStatus, cudaGetErrorString(cudaStatus));
OutputDebugStringA(debug_buf);
CloseHandle(sharedHandle);
return false;
}
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] D3D12 resource imported as CUDA external memory\n");
// Map external memory to CUDA device pointer
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Mapping CUDA external memory to device pointer...\n");
cudaExternalMemoryBufferDesc externalMemoryBufferDesc = {};
externalMemoryBufferDesc.offset = 0;
externalMemoryBufferDesc.size = externalMemoryHandleDesc.size;
externalMemoryBufferDesc.flags = 0;
cudaStatus = cudaExternalMemoryGetMappedBuffer(&devicePtr, externalMemory, &externalMemoryBufferDesc);
if (cudaStatus != cudaSuccess) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cudaExternalMemoryGetMappedBuffer failed with code %d: %s\n",
cudaStatus, cudaGetErrorString(cudaStatus));
OutputDebugStringA(debug_buf);
cudaDestroyExternalMemory(externalMemory);
CloseHandle(sharedHandle);
return false;
}
// Cache the external memory for reuse
m_cachedD3D12Resource = d3d12Resource;
m_cachedExternalMemory = externalMemory;
m_cachedDevicePtr = devicePtr;
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Cached external memory (resource=%p, extMem=%p, devPtr=%p)\n",
d3d12Resource, externalMemory, devicePtr);
OutputDebugStringA(debug_buf);
// Create D3D12 surface handler on-demand
if (!m_d3d12Handler) {
m_d3d12Handler = std::make_unique<D3D12SurfaceHandler>(
static_cast<ID3D12Device*>(m_d3d12Device),
m_cuContext
);
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] D3D12SurfaceHandler created\n");
}
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] CUDA device pointer mapped: %p\n", devicePtr);
OutputDebugStringA(debug_buf);
// Wait for decoded frame to be available (blocks until callback completes)
int frameIdx = -1;
@@ -1299,18 +1202,11 @@ bool NVDECAV1Decoder::DecodeToSurface(const uint8_t* packet_data, size_t packet_
CUdeviceptr srcDevicePtr = 0;
unsigned int srcPitch = 0;
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Calling cuvidMapVideoFrame (frameIdx=%d)\n", frameIdx);
OutputDebugStringA(debug_buf);
result = cuvidMapVideoFrame(m_decoder, frameIdx, &srcDevicePtr, &srcPitch, &procParams);
if (result != CUDA_SUCCESS) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cuvidMapVideoFrame failed with code %d\n", result);
OutputDebugStringA(debug_buf);
LogCUDAError(result, "cuvidMapVideoFrame");
// Don't destroy cached external memory on error - it will be cleaned up in Cleanup()
if (sharedHandle != nullptr) {
CloseHandle(sharedHandle);
}
return false;
}
@@ -1318,212 +1214,32 @@ bool NVDECAV1Decoder::DecodeToSurface(const uint8_t* packet_data, size_t packet_
(void*)srcDevicePtr, srcPitch);
OutputDebugStringA(debug_buf);
// Query D3D12 NV12 texture pitch (may be larger than width due to alignment)
D3D12_PLACED_SUBRESOURCE_FOOTPRINT layout = {};
UINT numRows = 0;
UINT64 rowSizeInBytes = 0;
UINT64 totalBytes = 0;
device->GetCopyableFootprints(&d3d12Desc, 0, 1, 0, &layout, &numRows, &rowSizeInBytes, &totalBytes);
UINT d3d12Pitch = layout.Footprint.RowPitch;
// Copy NV12 frame from CUDA to D3D12 texture using D3D12SurfaceHandler
ID3D12Resource* d3d12Resource = static_cast<ID3D12Resource*>(target_surface);
bool copySuccess = m_d3d12Handler->CopyNV12Frame(
srcDevicePtr, srcPitch,
d3d12Resource,
m_width, m_height
);
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] D3D12 NV12 texture pitch: %u (width: %u, srcPitch: %u)\n",
d3d12Pitch, m_width, srcPitch);
OutputDebugStringA(debug_buf);
// Copy Y plane from NVDEC to D3D12 NV12 texture (via CUDA device pointer)
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Copying Y plane to D3D12 texture...\n");
cudaError_t cudaStatus = cudaMemcpy2D(devicePtr, d3d12Pitch, // Use D3D12 texture pitch
(void*)srcDevicePtr, srcPitch,
srcPitch, m_height, // Use pitch as width to copy the entire row
cudaMemcpyDeviceToDevice);
if (cudaStatus != cudaSuccess) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cudaMemcpy2D (Y plane) failed with code %d: %s\n",
cudaStatus, cudaGetErrorString(cudaStatus));
OutputDebugStringA(debug_buf);
cuvidUnmapVideoFrame(m_decoder, srcDevicePtr);
// Don't destroy cached external memory on error - it will be cleaned up in Cleanup()
if (sharedHandle != nullptr) {
CloseHandle(sharedHandle);
}
return false;
}
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Y plane copied successfully to D3D12 texture\n");
// Copy UV plane from NVDEC to D3D12 NV12 texture
// Calculate proper UV plane offset using D3D12 footprint
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Calculating D3D12 UV plane offset...\n");
// Get proper layout for both Y and UV planes
D3D12_RESOURCE_DESC texDesc = d3d12Resource->GetDesc();
D3D12_PLACED_SUBRESOURCE_FOOTPRINT planeLayouts[2];
UINT planeNumRows[2] = { 0, };
UINT64 planeRowSizes[2] = { 0, };
UINT64 planeTotalBytes = 0;
// Zero out the layout arrays to avoid reading garbage data from uninitialized memory
memset(planeLayouts, 0, sizeof(planeLayouts));
// CRITICAL: Use actual video height, not texture allocation height
// Texture was allocated with height * 1.5 for NV12 layout, but GetCopyableFootprints
// should use actual video height to calculate correct plane offsets
D3D12_RESOURCE_DESC actualVideoDesc = texDesc;
actualVideoDesc.Height = m_height; // Use actual video height (2160), not allocation height (3240)
// CRITICAL: Query BOTH subresources in a SINGLE call to get correct relative offsets
// NV12 has 2 subresources (plane 0: Y, plane 1: UV)
// When querying separately, each starts at offset 0
// When querying together, planeLayouts[1].Offset will be the actual offset from base
device->GetCopyableFootprints(&actualVideoDesc, 0, 2, 0, planeLayouts, planeNumRows, planeRowSizes, &planeTotalBytes);
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] GetCopyableFootprints total bytes: %llu (allocation size: %llu)\n",
planeTotalBytes, allocInfo.SizeInBytes);
OutputDebugStringA(debug_buf);
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Y plane: offset=%llu, pitch=%u, width=%u, height=%u, rows=%u\n",
planeLayouts[0].Offset, planeLayouts[0].Footprint.RowPitch,
planeLayouts[0].Footprint.Width, planeLayouts[0].Footprint.Height, planeNumRows[0]);
OutputDebugStringA(debug_buf);
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] UV plane: offset=%llu, pitch=%u, width=%u, height=%u, rows=%u, rowSize=%llu\n",
planeLayouts[1].Offset, planeLayouts[1].Footprint.RowPitch,
planeLayouts[1].Footprint.Width, planeLayouts[1].Footprint.Height, planeNumRows[1], planeRowSizes[1]);
OutputDebugStringA(debug_buf);
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Copying UV plane to D3D12 texture...\n");
// CRITICAL: Use the EXACT UV plane offset from GetCopyableFootprints
// planeLayouts[1].Offset is the correct offset accounting for alignment
void* uvDstPtr = static_cast<uint8_t*>(devicePtr) + planeLayouts[1].Offset;
// NVDEC UV plane offset: For NV12, UV plane starts at Y_height * Y_pitch
void* uvSrcPtr = (void*)(srcDevicePtr + (srcPitch * m_height));
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] NVDEC UV source: srcDevicePtr=%p, Y_offset=%llu, UV_srcPtr=%p\n",
(void*)srcDevicePtr, (uint64_t)(srcPitch * m_height), uvSrcPtr);
OutputDebugStringA(debug_buf);
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] UV plane offset from GetCopyableFootprints: %llu bytes\n", planeLayouts[1].Offset);
OutputDebugStringA(debug_buf);
// UV plane: NV12 format has interleaved UV (UVUVUV...)
// CRITICAL: For cudaMemcpy2D, width parameter is in BYTES, not pixels
// UV plane stores U and V interleaved: each row has (width/2) UV pairs = width bytes total
// Even though D3D12 sees it as (width/2) R8G8 pixels, the memory layout is still width bytes per row
UINT uvCopyWidth = m_width; // Copy full width in bytes (includes both U and V channels)
UINT uvCopyHeight = m_height / 2; // UV plane has half height
// Verify we won't exceed allocation bounds
size_t uvPlaneNeededSize = static_cast<size_t>(planeLayouts[1].Footprint.RowPitch) * uvCopyHeight;
size_t totalNeededSize = planeLayouts[1].Offset + uvPlaneNeededSize;
size_t availableForUV = allocInfo.SizeInBytes - planeLayouts[1].Offset;
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Memory check: uvOffset=%llu, uvSize=%llu, total=%llu, allocated=%llu, available=%llu\n",
planeLayouts[1].Offset, uvPlaneNeededSize, totalNeededSize, allocInfo.SizeInBytes, availableForUV);
OutputDebugStringA(debug_buf);
// Clamp UV copy to fit within allocated memory
UINT maxUVRows = static_cast<UINT>(availableForUV / planeLayouts[1].Footprint.RowPitch);
if (maxUVRows < uvCopyHeight) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] WARNING: Clamping UV rows from %u to %u to fit allocation\n",
uvCopyHeight, maxUVRows);
OutputDebugStringA(debug_buf);
uvCopyHeight = maxUVRows;
}
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] UV copy params: width=%u, height=%u, dstPitch=%u, srcPitch=%u\n",
uvCopyWidth, uvCopyHeight, planeLayouts[1].Footprint.RowPitch, srcPitch);
OutputDebugStringA(debug_buf);
cudaStatus = cudaMemcpy2D(uvDstPtr, planeLayouts[1].Footprint.RowPitch,
uvSrcPtr, srcPitch,
srcPitch, uvCopyHeight, // Use pitch as width to copy the entire row
cudaMemcpyDeviceToDevice);
if (cudaStatus != cudaSuccess) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cudaMemcpy2D (UV plane) failed with code %d: %s\n",
cudaStatus, cudaGetErrorString(cudaStatus));
OutputDebugStringA(debug_buf);
cuvidUnmapVideoFrame(m_decoder, srcDevicePtr);
// Don't destroy cached external memory on error - it will be cleaned up in Cleanup()
if (sharedHandle != nullptr) {
CloseHandle(sharedHandle);
}
return false;
}
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] UV plane copied successfully to D3D12 texture\n");
// Asynchronously signal the D3D12 fence from CUDA when copies are complete
if (m_cudaSemaphore != nullptr) {
// Ensure we're in the correct CUDA context
CUcontext currentContext = nullptr;
cuCtxGetCurrent(&currentContext);
char debug_buf[256];
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Current CUDA context: %p, Expected: %p\n",
currentContext, m_cuContext);
OutputDebugStringA(debug_buf);
if (currentContext != m_cuContext) {
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] WARNING: CUDA context mismatch, setting correct context\n");
cuCtxSetCurrent(m_cuContext);
}
m_fenceValue++;
cudaExternalSemaphoreSignalParams signalParams = {};
signalParams.params.fence.value = m_fenceValue;
signalParams.flags = 0;
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] Signaling fence with value: %llu, semaphore: %p, stream: %p\n",
m_fenceValue, m_cudaSemaphore, m_stream);
OutputDebugStringA(debug_buf);
cudaStatus = cudaSignalExternalSemaphoresAsync(&m_cudaSemaphore, &signalParams, 1, m_stream);
if (cudaStatus != cudaSuccess) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cudaSignalExternalSemaphoresAsync failed: %s (error code: %d)\n",
cudaGetErrorString(cudaStatus), cudaStatus);
OutputDebugStringA(debug_buf);
// Try synchronizing the stream and signaling the fence from CPU instead
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Falling back to CPU fence signaling\n");
cudaStreamSynchronize(m_stream);
if (m_d3d12Fence != nullptr) {
HRESULT hr = static_cast<ID3D12Fence*>(m_d3d12Fence)->Signal(m_fenceValue);
if (SUCCEEDED(hr)) {
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] CPU fence signal succeeded\n");
output_frame.sync_fence_value = m_fenceValue;
} else {
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] CPU fence signal also failed\n");
output_frame.sync_fence_value = 0;
}
} else {
output_frame.sync_fence_value = 0;
}
} else {
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] CUDA fence signal enqueued successfully\n");
// Pass the fence value to the caller
output_frame.sync_fence_value = m_fenceValue;
}
} else {
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] No CUDA semaphore available, skipping fence signal\n");
// No synchronization available
output_frame.sync_fence_value = 0;
}
// Unmap frame and close shared handle (if newly created)
// Unmap frame
result = cuvidUnmapVideoFrame(m_decoder, srcDevicePtr);
if (result != CUDA_SUCCESS) {
sprintf_s(debug_buf, "[NVDECAV1Decoder::DecodeToSurface] cuvidUnmapVideoFrame failed with code %d\n", result);
OutputDebugStringA(debug_buf);
LogCUDAError(result, "cuvidUnmapVideoFrame");
// Even if unmap fails, try to continue and close the handle
}
if (sharedHandle != nullptr) {
CloseHandle(sharedHandle);
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] Shared handle closed\n");
if (!copySuccess) {
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] D3D12SurfaceHandler::CopyNV12Frame failed\n");
return false;
}
// External memory is cached and will be reused for next frame
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] D3D12 frame processing complete (external memory cached, GPU synchronized)\n");
// Signal D3D12 fence (not yet implemented in D3D12SurfaceHandler)
m_d3d12Handler->SignalD3D12Fence(++m_fenceValue);
output_frame.sync_fence_value = m_fenceValue;
OutputDebugStringA("[NVDECAV1Decoder::DecodeToSurface] D3D12 frame processing complete\n");
// Fill output frame metadata
output_frame.width = m_width;

11
vav2/platforms/windows/vavcore/src/Decoder/NVDECAV1Decoder.h
View File

@@ -6,6 +6,11 @@
#include <mutex>
#include <condition_variable>
// Forward declarations
namespace VavCore {
class D3D12SurfaceHandler;
}
//// Prevent TIMECODE conflicts by defining it before Windows headers
//#define WIN32_LEAN_AND_MEAN
//#define NOMINMAX
@@ -118,10 +123,8 @@ private:
cudaExternalSemaphore_t m_cudaSemaphore = {};
uint64_t m_fenceValue = 0;
// External memory caching for D3D12 interop
void* m_cachedD3D12Resource = nullptr; // ID3D12Resource*
cudaExternalMemory_t m_cachedExternalMemory = nullptr;
void* m_cachedDevicePtr = nullptr;
// D3D12 surface handler (created on-demand)
std::unique_ptr<D3D12SurfaceHandler> m_d3d12Handler;
// Decoder configuration
CUVIDPARSERPARAMS m_parserParams = {};