nv_dvp_bridge.cpp File Reference

Implementation of nv_dvp_bridge.h. Wraps NVIDIA's "GPUDirect for Video" (DVP) SDK so score's AJA GPU-direct output path can DMA encoder output from GPU memory to AJA-DMA-locked sysmem on Windows. More...

Detailed Description

Implementation of nv_dvp_bridge.h. Wraps NVIDIA's "GPUDirect for Video" (DVP) SDK so score's AJA GPU-direct output path can DMA encoder output from GPU memory to AJA-DMA-locked sysmem on Windows.

Reference implementation: AJA's ntv2glTextureTransferNV.cpp in 3rdparty/libajantv2/demos/NVIDIA/common/. This bridge collapses the demo's chunked-async transfer into one synchronous call per frame; the AJA strategies in score-plugin-gfx provide pipelining via their slot ring + the AJAConsumerThread instead of via DVP-side chunking.

Classes
struct	NvDvpContext_t

Macros
#define	DVP_CHECK(call, ctx, retval)

Functions
bool	nv_dvp_available (void)
const char *	nv_dvp_get_error_string (NvDvpContextHandle ctx)
NvDvpError	nv_dvp_init_d3d11 (NvDvpContextHandle *out_ctx, void *d3d11_device)
NvDvpError	nv_dvp_init_gl (NvDvpContextHandle *out_ctx)
NvDvpError	nv_dvp_init_cuda (NvDvpContextHandle *out_ctx)
void	nv_dvp_shutdown (NvDvpContextHandle ctx)
NvDvpError	nv_dvp_thread_begin (NvDvpContextHandle ctx)
NvDvpError	nv_dvp_thread_end (NvDvpContextHandle ctx)
NvDvpError	nv_dvp_register_d3d11_texture (NvDvpContextHandle ctx, void *d3d11_texture, NvDvpFormat, uint32_t width, uint32_t height, NvDvpResourceHandle *out_handle)
NvDvpError	nv_dvp_register_gl_texture (NvDvpContextHandle ctx, uint32_t gl_texture_id, NvDvpFormat, uint32_t width, uint32_t height, NvDvpResourceHandle *out_handle)
NvDvpError	nv_dvp_register_cuda_device_ptr (NvDvpContextHandle ctx, uint64_t cuda_device_ptr, NvDvpFormat, uint32_t width, uint32_t height, NvDvpResourceHandle *out_handle)
NvDvpError	nv_dvp_register_cuda_array (NvDvpContextHandle ctx, void *cuda_array, NvDvpFormat, uint32_t width, uint32_t height, NvDvpResourceHandle *out_handle)
NvDvpError	nv_dvp_register_sysmem_buffer (NvDvpContextHandle ctx, void *sysmem_ptr, NvDvpFormat format, uint32_t width, uint32_t height, uint32_t stride_bytes, NvDvpResourceHandle *out_handle)
void	nv_dvp_unregister (NvDvpContextHandle ctx, NvDvpResourceHandle handle)
NvDvpError	nv_dvp_acquire_texture (NvDvpContextHandle ctx, NvDvpResourceHandle texture)
NvDvpError	nv_dvp_release_texture (NvDvpContextHandle ctx, NvDvpResourceHandle texture)
NvDvpError	nv_dvp_copy_texture_to_buffer (NvDvpContextHandle ctx, NvDvpResourceHandle src_texture, NvDvpResourceHandle dst_buffer)
NvDvpError	nv_dvp_copy_buffer_to_texture (NvDvpContextHandle ctx, NvDvpResourceHandle src_buffer, NvDvpResourceHandle dst_texture)
NvDvpError	nv_dvp_copy_buffer_to_cuda (NvDvpContextHandle ctx, NvDvpResourceHandle src_buffer, NvDvpResourceHandle dst_cuda, void *cuda_stream)
NvDvpError	nv_dvp_copy_cuda_to_buffer (NvDvpContextHandle ctx, NvDvpResourceHandle src_cuda, NvDvpResourceHandle dst_buffer, void *cuda_stream)
void *	nv_dvp_aligned_alloc (uint64_t bytes)
void	nv_dvp_aligned_free (void *ptr)

Macro Definition Documentation

DVP_CHECK

#define DVP_CHECK	(		call,
			ctx,
			retval
	)

Value:

  do                                                                  \
  {                                                                   \
    DVPStatus _st = (call);                                           \
    if(_st != DVP_STATUS_OK)                                          \
    {                                                                 \
      setError((ctx), #call, _st);                                    \
      return (retval);                                                \
    }                                                                 \
  } while(0)