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mediafoundation: mftransform async slices parsing, avoid heap allocation inside loop

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Reviewed-by: Pohsiang (John) Hsu <pohhsu@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37820>
This commit is contained in:
Silvio Vilerino 2025-09-29 13:11:54 -04:00 • committed by Pohsiang (John) Hsu
parent 6e189ba6c1
commit 5061b7ba1a
1 changed files with 4 additions and 1 deletions
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5
src/gallium/frontends/mediafoundation/mftransform.cpp
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@ -1200,6 +1200,9 @@ CDX12EncHMFT::xThreadProc( void *pCtx )
spMemoryBuffer->Lock( &lpBuffer, NULL, NULL );
uint32_t num_slice_buffers = static_cast<uint32_t>( pDX12EncodeContext->pSliceFences.size() );
std::vector<struct codec_unit_location_t> codec_unit_metadata;
const size_t max_default_init_alloc_count_nals = 64u;
codec_unit_metadata.reserve(max_default_init_alloc_count_nals);
for( uint32_t slice_idx = 0; slice_idx < num_slice_buffers; slice_idx++ )
{
assert( pDX12EncodeContext->pSliceFences[slice_idx] );
@ -1211,7 +1214,6 @@ CDX12EncHMFT::xThreadProc( void *pCtx )
pThis->m_pPipeVideoCodec->destroy_fence( pThis->m_pPipeVideoCodec, pDX12EncodeContext->pSliceFences[slice_idx] );
if( fenceWaitResult )
{
std::vector<struct codec_unit_location_t> codec_unit_metadata;
unsigned codec_unit_metadata_count = 0u;
pThis->m_pPipeVideoCodec->get_slice_bitstream_data( pThis->m_pPipeVideoCodec,
pDX12EncodeContext->pAsyncCookie,
@ -1219,6 +1221,7 @@ CDX12EncHMFT::xThreadProc( void *pCtx )
NULL /*get size*/,
&codec_unit_metadata_count );
assert( codec_unit_metadata_count > 0 );
codec_unit_metadata.clear();
codec_unit_metadata.resize( codec_unit_metadata_count, {} );
pThis->m_pPipeVideoCodec->get_slice_bitstream_data( pThis->m_pPipeVideoCodec,
pDX12EncodeContext->pAsyncCookie,