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Implement libplacebo on MoltenVK

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This commit is contained in:
Cameron Gutman
2026-06-14 15:45:38 -05:00
parent ec75f0d8de
commit 8c6b422040
6 changed files with 237 additions and 15 deletions
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app/streaming/video/ffmpeg-renderers/plvk.cpp
+43 -10
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@@ -177,6 +177,9 @@ PlVkRenderer::~PlVkRenderer()
pl_renderer_destroy(&m_Renderer);
pl_swapchain_destroy(&m_Swapchain);
#ifdef Q_OS_DARWIN
m_MetalTextureFactory.reset();
#endif
pl_vulkan_destroy(&m_Vulkan);
// This surface was created by SDL, so there's no libplacebo API to destroy it
@@ -358,7 +361,10 @@ bool PlVkRenderer::tryInitializeDevice(VkPhysicalDevice device, VkPhysicalDevice
vkParams.device = device;
if (m_HwDeviceType == AV_HWDEVICE_TYPE_VULKAN) {
#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(60, 26, 100)
#if defined(Q_OS_DARWIN)
vkParams.opt_extensions = nullptr;
vkParams.num_opt_extensions = 0;
#elif LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(60, 26, 100)
vkParams.opt_extensions = av_vk_get_optional_device_extensions(&vkParams.num_opt_extensions);
#else
vkParams.opt_extensions = k_OptionalDeviceExtensions;
@@ -602,6 +608,10 @@ bool PlVkRenderer::initialize(PDECODER_PARAMETERS params)
}
}
#ifdef Q_OS_DARWIN
m_MetalTextureFactory = std::make_unique<MetalVulkanTextureFactory>(m_Vulkan);
#endif
return true;
}
@@ -625,13 +635,23 @@ bool PlVkRenderer::prepareDecoderContext(AVCodecContext *context, AVDictionary *
bool PlVkRenderer::mapAvFrameToPlacebo(const AVFrame *frame, pl_frame* mappedFrame)
{
pl_avframe_params mapParams = {};
mapParams.frame = frame;
mapParams.tex = m_Textures;
if (!pl_map_avframe_ex(m_Vulkan->gpu, mappedFrame, &mapParams)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"pl_map_avframe_ex() failed");
return false;
#ifdef Q_OS_DARWIN
if (frame->format == AV_PIX_FMT_VIDEOTOOLBOX) {
if (!m_MetalTextureFactory->mapVideoToolboxToPlacebo(frame, mappedFrame)) {
return false;
}
}
else
#endif
{
pl_avframe_params mapParams = {};
mapParams.frame = frame;
mapParams.tex = m_Textures;
if (!pl_map_avframe_ex(m_Vulkan->gpu, mappedFrame, &mapParams)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"pl_map_avframe_ex() failed");
return false;
}
}
// libplacebo assumes a minimum luminance value of 0 means the actual value was unknown.
@@ -653,6 +673,19 @@ bool PlVkRenderer::mapAvFrameToPlacebo(const AVFrame *frame, pl_frame* mappedFra
return true;
}
void PlVkRenderer::unmapAvFrameFromPlacebo(const AVFrame *frame, pl_frame* mappedFrame)
{
#ifdef Q_OS_DARWIN
if (frame->format == AV_PIX_FMT_VIDEOTOOLBOX) {
m_MetalTextureFactory->unmapVideoToolboxFromPlacebo(mappedFrame);
}
else
#endif
{
pl_unmap_avframe(m_Vulkan->gpu, mappedFrame);
}
}
bool PlVkRenderer::populateQueues(int videoFormat)
{
auto vkDeviceContext = (AVVulkanDeviceContext*)((AVHWDeviceContext *)m_HwDeviceCtx->data)->hwctx;
@@ -971,7 +1004,7 @@ UnmapExit:
pl_tex_destroy(m_Vulkan->gpu, &texture);
}
pl_unmap_avframe(m_Vulkan->gpu, &mappedFrame);
unmapAvFrameFromPlacebo(frame, &mappedFrame);
}
bool PlVkRenderer::testRenderFrame(AVFrame *frame)
@@ -995,7 +1028,7 @@ bool PlVkRenderer::testRenderFrame(AVFrame *frame)
return false;
}
pl_unmap_avframe(m_Vulkan->gpu, &mappedFrame);
unmapAvFrameFromPlacebo(frame, &mappedFrame);
return true;
}