[vlc-commits] doc: add a sample app to demo D3D9 callbacks
Steve Lhomme
git at videolan.org
Sat May 11 07:36:11 CEST 2019
vlc | branch: master | Steve Lhomme <robux4 at ycbcr.xyz> | Wed Mar 20 15:13:11 2019 +0100| [5ef4b70f9ae0b63ed2e98ed2edae66c62dfa8c9a] | committer: Steve Lhomme
doc: add a sample app to demo D3D9 callbacks
> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=5ef4b70f9ae0b63ed2e98ed2edae66c62dfa8c9a
---
doc/libvlc/d3d9_player.c | 380 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 380 insertions(+)
diff --git a/doc/libvlc/d3d9_player.c b/doc/libvlc/d3d9_player.c
new file mode 100644
index 0000000000..1264e63daf
--- /dev/null
+++ b/doc/libvlc/d3d9_player.c
@@ -0,0 +1,380 @@
+/* compile using: gcc d3d9_player.c -o d3d9_player.exe -I <path/liblc> -llibvlc -ld3d9 */
+
+#include <windows.h>
+#include <windowsx.h>
+#define COBJMACROS
+#include <d3d9.h>
+
+#include <vlc/vlc.h>
+
+#define SCREEN_WIDTH 900
+#define SCREEN_HEIGHT 900
+#define BORDER_LEFT ( 20)
+#define BORDER_RIGHT (700 + BORDER_LEFT)
+#define BORDER_TOP ( 10)
+#define BORDER_BOTTOM (700 + BORDER_TOP)
+
+struct render_context
+{
+ HWND hWnd;
+
+ IDirect3D9Ex *d3d;
+ IDirect3DDevice9 *d3ddev; /* the host app device */
+ IDirect3DDevice9 *libvlc_d3d; /* the device where VLC can do its rendering */
+
+ /* surface we'll use to display on our backbuffer */
+ IDirect3DTexture9 *renderTexture;
+ HANDLE sharedHandled;
+ /* surface that VLC will render to, which is a shared version of renderTexture
+ * on libvlc_d3d */
+ IDirect3DTexture9 *sharedRenderTexture;
+ IDirect3DSurface9 *sharedRenderSurface;
+
+ /* our swapchain backbuffer */
+ IDirect3DSurface9 *backBuffer;
+
+ IDirect3DVertexBuffer9 *rectangleFVFVertexBuf;
+};
+
+struct CUSTOMVERTEX {FLOAT X, Y, Z, RHW; DWORD COLOR;
+ FLOAT tu, tv; /* texture relative coordinates */};
+#define CUSTOMFVF (D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1)
+
+/**
+ * Callback called just before VLC starts drawing the video.
+ *
+ * Set the surface VLC will render to (could be the backbuffer if nothing else
+ * needs to be displayed). And then call BeginScene().
+ *
+ * This is called outside of the UI thread (in the VLC rendering thread).
+ */
+static bool StartRender(struct render_context *ctx)
+{
+ HRESULT hr;
+
+ hr = IDirect3DDevice9_SetRenderTarget(ctx->libvlc_d3d, 0, ctx->sharedRenderSurface);
+ if (FAILED(hr)) return false;
+
+ /* clear the vlc destination texture to black alternatively */
+ hr = IDirect3DDevice9_Clear(ctx->libvlc_d3d, 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);
+ if (FAILED(hr)) return false;
+
+ hr = IDirect3DDevice9_BeginScene(ctx->libvlc_d3d);
+ if (hr == D3DERR_DEVICENOTRESET)
+ {
+ /* TODO reset the device, this may not work with hardware decoding */
+ return false;
+ }
+ if (FAILED(hr)) return false;
+
+ return true;
+}
+
+/**
+ * Callback called after VLC has finished drawing the video.
+ *
+ * This is called outside of the UI thread (in the VLC rendering thread).
+ */
+static void EndRender(struct render_context *ctx)
+{
+ IDirect3DDevice9_EndScene(ctx->libvlc_d3d);
+
+ IDirect3DDevice9_Present(ctx->libvlc_d3d, NULL, NULL, NULL, NULL);
+}
+
+/**
+ * Callback called when it's time to display the video, in sync with the audio.
+ *
+ * This is called outside of the UI thread (in the VLC rendering thread).
+ */
+static void Swap(struct render_context *ctx)
+{
+ /* finished drawing to our swap surface, now render that surface to the backbuffer */
+ IDirect3DDevice9_SetRenderTarget(ctx->d3ddev, 0, ctx->backBuffer);
+
+ /* clear the backbuffer to orange */
+ IDirect3DDevice9_Clear(ctx->d3ddev, 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 120, 0), 1.0f, 0);
+
+ IDirect3DDevice9_BeginScene(ctx->d3ddev);
+ IDirect3DDevice9_SetTexture(ctx->d3ddev, 0, (IDirect3DBaseTexture9*)ctx->renderTexture);
+
+ IDirect3DDevice9_SetStreamSource(ctx->d3ddev, 0, ctx->rectangleFVFVertexBuf, 0, sizeof(struct CUSTOMVERTEX));
+ IDirect3DDevice9_SetFVF(ctx->d3ddev, CUSTOMFVF);
+ IDirect3DDevice9_DrawPrimitive(ctx->d3ddev, D3DPT_TRIANGLEFAN, 0, 2);
+ IDirect3DDevice9_EndScene(ctx->d3ddev);
+
+ IDirect3DDevice9_Present(ctx->d3ddev, NULL, NULL, ctx->hWnd, NULL);
+}
+
+/**
+ * Callback called to tell the size of the surface that should be available
+ * to VLC to draw into.
+ *
+ * This is called outside of the UI thread (not the VLC rendering thread).
+ */
+static bool Resize(struct render_context *ctx, unsigned width, unsigned height,
+ libvlc_video_output_cfg_t *out)
+{
+ HRESULT hr;
+ D3DDISPLAYMODE d3ddm;
+
+ hr = IDirect3D9Ex_GetAdapterDisplayMode(ctx->d3d, 0, &d3ddm);
+
+ /* create the output surface VLC will write to */
+ if (ctx->renderTexture)
+ {
+ IDirect3DTexture9_Release(ctx->renderTexture);
+ ctx->renderTexture = NULL;
+ ctx->sharedHandled = NULL;
+ }
+ if (ctx->sharedRenderSurface)
+ {
+ IDirect3DSurface9_Release(ctx->sharedRenderSurface);
+ ctx->sharedRenderSurface = NULL;
+ }
+ if (ctx->sharedRenderTexture)
+ {
+ IDirect3DTexture9_Release(ctx->sharedRenderTexture);
+ ctx->sharedRenderTexture = NULL;
+ }
+
+ /* texture we can use on our device */
+ hr = IDirect3DDevice9_CreateTexture(ctx->d3ddev, width, height, 1, D3DUSAGE_RENDERTARGET,
+ d3ddm.Format,
+ D3DPOOL_DEFAULT,
+ &ctx->renderTexture,
+ &ctx->sharedHandled);
+ if (FAILED(hr))
+ return false;
+
+ /* texture/surface that is set as the render target for libvlc on its device */
+ hr = IDirect3DDevice9_CreateTexture(ctx->libvlc_d3d, width, height, 1, D3DUSAGE_RENDERTARGET,
+ d3ddm.Format,
+ D3DPOOL_DEFAULT,
+ &ctx->sharedRenderTexture,
+ &ctx->sharedHandled);
+ if (FAILED(hr))
+ return false;
+
+ hr = IDirect3DTexture9_GetSurfaceLevel(ctx->sharedRenderTexture, 0, &ctx->sharedRenderSurface);
+ if (FAILED(hr))
+ return false;
+
+ out->surface_format = d3ddm.Format;
+ out->full_range = true;
+ out->colorspace = libvlc_video_colorspace_BT709;
+ out->primaries = libvlc_video_primaries_BT709;
+ out->transfer = libvlc_video_transfer_func_SRGB;
+
+ return true;
+}
+
+static void init_direct3d(struct render_context *ctx, HWND hWnd)
+{
+ ctx->hWnd = hWnd;
+ HRESULT hr = Direct3DCreate9Ex(D3D_SDK_VERSION, &ctx->d3d);
+
+ D3DPRESENT_PARAMETERS d3dpp = { 0 };
+ d3dpp.Windowed = TRUE;
+ d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
+ d3dpp.hDeviceWindow = hWnd;
+
+ IDirect3D9Ex_CreateDevice(ctx->d3d, D3DADAPTER_DEFAULT,
+ D3DDEVTYPE_HAL,
+ NULL,
+ D3DCREATE_MULTITHREADED| D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE,
+ &d3dpp,
+ &ctx->d3ddev);
+
+ d3dpp.hDeviceWindow = 0;
+
+ IDirect3D9Ex_CreateDevice(ctx->d3d, D3DADAPTER_DEFAULT,
+ D3DDEVTYPE_HAL,
+ NULL,
+ D3DCREATE_MULTITHREADED| D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE,
+ &d3dpp,
+ &ctx->libvlc_d3d);
+
+ IDirect3DDevice9_GetRenderTarget(ctx->d3ddev, 0, &ctx->backBuffer);
+
+ struct CUSTOMVERTEX rectangleVertices[] =
+ {
+ { BORDER_LEFT, BORDER_TOP, 0.0f, 1.0f, D3DCOLOR_ARGB(255, 255, 255, 255), 0.0f, 0.0f },
+ { BORDER_RIGHT, BORDER_TOP, 0.0f, 1.0f, D3DCOLOR_ARGB(255, 255, 255, 255), 1.0f, 0.0f },
+ { BORDER_RIGHT, BORDER_BOTTOM, 0.0f, 1.0f, D3DCOLOR_ARGB(255, 255, 255, 255), 1.0f, 1.0f },
+ { BORDER_LEFT, BORDER_BOTTOM, 0.0f, 1.0f, D3DCOLOR_ARGB(255, 255, 255, 255), 0.0f, 1.0f },
+ };
+ IDirect3DDevice9Ex_CreateVertexBuffer(ctx->d3ddev, sizeof(rectangleVertices),
+ D3DUSAGE_DYNAMIC|D3DUSAGE_WRITEONLY,
+ CUSTOMFVF,
+ D3DPOOL_DEFAULT,
+ &ctx->rectangleFVFVertexBuf,
+ NULL);
+
+ LPVOID pVoid;
+ IDirect3DVertexBuffer9_Lock(ctx->rectangleFVFVertexBuf, 0, 0, (void**)&pVoid, 0);
+ memcpy(pVoid, rectangleVertices, sizeof(rectangleVertices));
+ IDirect3DVertexBuffer9_Unlock(ctx->rectangleFVFVertexBuf);
+}
+
+static void release_direct3d(struct render_context *ctx)
+{
+ if (ctx->backBuffer)
+ IDirect3DSurface9_Release(ctx->backBuffer);
+ if (ctx->renderTexture)
+ IDirect3DTexture9_Release(ctx->renderTexture);
+ if (ctx->sharedRenderSurface)
+ IDirect3DSurface9_Release(ctx->sharedRenderSurface);
+ if (ctx->sharedRenderTexture)
+ IDirect3DTexture9_Release(ctx->sharedRenderTexture);
+ if (ctx->rectangleFVFVertexBuf)
+ IDirect3DVertexBuffer9_Release(ctx->rectangleFVFVertexBuf);
+ IDirect3DDevice9_Release(ctx->libvlc_d3d);
+ IDirect3DDevice9_Release(ctx->d3ddev);
+ IDirect3D9_Release(ctx->d3d);
+}
+
+static bool Setup_cb( void **opaque, const libvlc_video_direct3d_device_cfg_t *cfg, libvlc_video_direct3d_device_setup_t *out )
+{
+ struct render_context *ctx = *opaque;
+ out->device_context = ctx->libvlc_d3d;
+ return true;
+}
+
+static void Cleanup_cb( void *opaque )
+{
+ /* here we can release all things Direct3D9 for good (if playing only one file) */
+ struct render_context *ctx = opaque;
+}
+
+static bool UpdateOutput_cb( void *opaque, const libvlc_video_direct3d_cfg_t *cfg, libvlc_video_output_cfg_t *out )
+{
+ struct render_context *ctx = opaque;
+ return Resize(ctx, cfg->width, cfg->height, out);
+}
+
+static void Swap_cb( void* opaque )
+{
+ struct render_context *ctx = opaque;
+ Swap( ctx );
+}
+
+static bool StartRendering_cb( void *opaque, bool enter )
+{
+ struct render_context *ctx = opaque;
+ if ( enter )
+ {
+ return StartRender( ctx );
+ }
+
+ EndRender( ctx );
+ return true;
+}
+
+static LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+ switch(message)
+ {
+ case WM_DESTROY:
+ {
+ PostQuitMessage(0);
+ return 0;
+ } break;
+ }
+
+ return DefWindowProc (hWnd, message, wParam, lParam);
+}
+
+int WINAPI WinMain(HINSTANCE hInstance,
+ HINSTANCE hPrevInstance,
+ LPSTR lpCmdLine,
+ int nCmdShow)
+{
+ HWND hWnd;
+ WNDCLASSEX wc;
+ struct render_context Context = { 0 };
+ char *file_path;
+ libvlc_instance_t *p_libvlc;
+ libvlc_media_t *p_media;
+ libvlc_media_player_t *p_mp;
+ (void)hPrevInstance;
+
+ /* remove "" around the given path */
+ if (lpCmdLine[0] == '"')
+ {
+ file_path = strdup( lpCmdLine+1 );
+ if (file_path[strlen(file_path)-1] == '"')
+ file_path[strlen(file_path)-1] = '\0';
+ }
+ else
+ file_path = strdup( lpCmdLine );
+
+ p_libvlc = libvlc_new( 0, NULL );
+ p_media = libvlc_media_new_path( p_libvlc, file_path );
+ free( file_path );
+ p_mp = libvlc_media_player_new_from_media( p_media );
+
+ ZeroMemory(&wc, sizeof(WNDCLASSEX));
+
+ wc.cbSize = sizeof(WNDCLASSEX);
+ wc.style = CS_HREDRAW | CS_VREDRAW;
+ wc.lpfnWndProc = WindowProc;
+ wc.hInstance = hInstance;
+ wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+ wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
+ wc.lpszClassName = "WindowClass";
+
+ RegisterClassEx(&wc);
+
+ RECT wr = {0, 0, SCREEN_WIDTH, SCREEN_HEIGHT};
+ AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);
+
+ hWnd = CreateWindowEx(0,
+ "WindowClass",
+ "libvlc Demo app",
+ WS_OVERLAPPEDWINDOW,
+ CW_USEDEFAULT, CW_USEDEFAULT,
+ wr.right - wr.left,
+ wr.bottom - wr.top,
+ NULL,
+ NULL,
+ hInstance,
+ p_mp);
+
+ ShowWindow(hWnd, nCmdShow);
+
+ init_direct3d(&Context, hWnd);
+
+ // DON'T use with callbacks libvlc_media_player_set_hwnd(p_mp, hWnd);
+
+ /* Tell VLC to render into our D3D9 environment */
+ libvlc_video_direct3d_set_callbacks( p_mp, libvlc_video_direct3d_engine_d3d9,
+ Setup_cb, Cleanup_cb, UpdateOutput_cb, Swap_cb, StartRendering_cb,
+ &Context );
+
+ libvlc_media_player_play( p_mp );
+
+ MSG msg;
+
+ while(TRUE)
+ {
+ while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+ {
+ TranslateMessage(&msg);
+ DispatchMessage(&msg);
+ }
+
+ if(msg.message == WM_QUIT)
+ break;
+ }
+
+ libvlc_media_player_stop( p_mp );
+
+ libvlc_media_player_release( p_mp );
+ libvlc_media_release( p_media );
+ libvlc_release( p_libvlc );
+
+ release_direct3d(&Context);
+
+ return msg.wParam;
+}
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