mirror of
https://github.com/RetroDECK/ES-DE.git
synced 2024-11-24 07:05:39 +00:00
332 lines
9.1 KiB
C++
332 lines
9.1 KiB
C++
#include "components/VideoVlcComponent.h"
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#include "Renderer.h"
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#include "ThemeData.h"
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#include "Util.h"
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#include "Settings.h"
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#ifdef WIN32
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#include <codecvt>
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#endif
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libvlc_instance_t* VideoVlcComponent::mVLC = NULL;
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// VLC prepares to render a video frame.
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static void *lock(void *data, void **p_pixels) {
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struct VideoContext *c = (struct VideoContext *)data;
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SDL_LockMutex(c->mutex);
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SDL_LockSurface(c->surface);
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*p_pixels = c->surface->pixels;
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return NULL; // Picture identifier, not needed here.
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}
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// VLC just rendered a video frame.
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static void unlock(void *data, void *id, void *const *p_pixels) {
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struct VideoContext *c = (struct VideoContext *)data;
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SDL_UnlockSurface(c->surface);
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SDL_UnlockMutex(c->mutex);
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}
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// VLC wants to display a video frame.
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static void display(void *data, void *id) {
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//Data to be displayed
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}
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VideoVlcComponent::VideoVlcComponent(Window* window) :
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VideoComponent(window),
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mMediaPlayer(nullptr)
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{
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memset(&mContext, 0, sizeof(mContext));
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// Get an empty texture for rendering the video
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mTexture = TextureResource::get("");
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// Make sure VLC has been initialised
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setupVLC();
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}
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VideoVlcComponent::~VideoVlcComponent()
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{
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stopVideo();
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}
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void VideoVlcComponent::setResize(float width, float height)
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{
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mTargetSize << width, height;
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mTargetIsMax = false;
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mStaticImage.setResize(width, height);
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resize();
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}
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void VideoVlcComponent::setMaxSize(float width, float height)
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{
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mTargetSize << width, height;
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mTargetIsMax = true;
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mStaticImage.setMaxSize(width, height);
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resize();
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}
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void VideoVlcComponent::resize()
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{
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if(!mTexture)
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return;
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const Eigen::Vector2f textureSize(mVideoWidth, mVideoHeight);
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if(textureSize.isZero())
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return;
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// SVG rasterization is determined by height (see SVGResource.cpp), and rasterization is done in terms of pixels
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// if rounding is off enough in the rasterization step (for images with extreme aspect ratios), it can cause cutoff when the aspect ratio breaks
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// so, we always make sure the resultant height is an integer to make sure cutoff doesn't happen, and scale width from that
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// (you'll see this scattered throughout the function)
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// this is probably not the best way, so if you're familiar with this problem and have a better solution, please make a pull request!
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if(mTargetIsMax)
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{
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mSize = textureSize;
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Eigen::Vector2f resizeScale((mTargetSize.x() / mSize.x()), (mTargetSize.y() / mSize.y()));
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if(resizeScale.x() < resizeScale.y())
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{
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mSize[0] *= resizeScale.x();
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mSize[1] *= resizeScale.x();
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}else{
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mSize[0] *= resizeScale.y();
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mSize[1] *= resizeScale.y();
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}
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// for SVG rasterization, always calculate width from rounded height (see comment above)
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mSize[1] = round(mSize[1]);
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mSize[0] = (mSize[1] / textureSize.y()) * textureSize.x();
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}else{
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// if both components are set, we just stretch
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// if no components are set, we don't resize at all
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mSize = mTargetSize.isZero() ? textureSize : mTargetSize;
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// if only one component is set, we resize in a way that maintains aspect ratio
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// for SVG rasterization, we always calculate width from rounded height (see comment above)
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if(!mTargetSize.x() && mTargetSize.y())
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{
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mSize[1] = round(mTargetSize.y());
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mSize[0] = (mSize.y() / textureSize.y()) * textureSize.x();
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}else if(mTargetSize.x() && !mTargetSize.y())
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{
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mSize[1] = round((mTargetSize.x() / textureSize.x()) * textureSize.y());
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mSize[0] = (mSize.y() / textureSize.y()) * textureSize.x();
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}
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}
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// mSize.y() should already be rounded
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mTexture->rasterizeAt((int)round(mSize.x()), (int)round(mSize.y()));
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onSizeChanged();
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}
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void VideoVlcComponent::render(const Eigen::Affine3f& parentTrans)
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{
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VideoComponent::render(parentTrans);
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float x, y;
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Eigen::Affine3f trans = parentTrans * getTransform();
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GuiComponent::renderChildren(trans);
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Renderer::setMatrix(trans);
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if (mIsPlaying && mContext.valid)
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{
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float tex_offs_x = 0.0f;
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float tex_offs_y = 0.0f;
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float x2;
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float y2;
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x = -(float)mSize.x() * mOrigin.x();
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y = -(float)mSize.y() * mOrigin.y();
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x2 = x+mSize.x();
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y2 = y+mSize.y();
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// Define a structure to contain the data for each vertex
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struct Vertex
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{
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Eigen::Vector2f pos;
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Eigen::Vector2f tex;
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Eigen::Vector4f colour;
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} vertices[6];
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// We need two triangles to cover the rectangular area
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vertices[0].pos[0] = x; vertices[0].pos[1] = y;
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vertices[1].pos[0] = x; vertices[1].pos[1] = y2;
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vertices[2].pos[0] = x2; vertices[2].pos[1] = y;
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vertices[3].pos[0] = x2; vertices[3].pos[1] = y;
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vertices[4].pos[0] = x; vertices[4].pos[1] = y2;
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vertices[5].pos[0] = x2; vertices[5].pos[1] = y2;
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// Texture coordinates
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vertices[0].tex[0] = -tex_offs_x; vertices[0].tex[1] = -tex_offs_y;
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vertices[1].tex[0] = -tex_offs_x; vertices[1].tex[1] = 1.0f + tex_offs_y;
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vertices[2].tex[0] = 1.0f + tex_offs_x; vertices[2].tex[1] = -tex_offs_y;
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vertices[3].tex[0] = 1.0f + tex_offs_x; vertices[3].tex[1] = -tex_offs_y;
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vertices[4].tex[0] = -tex_offs_x; vertices[4].tex[1] = 1.0f + tex_offs_y;
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vertices[5].tex[0] = 1.0f + tex_offs_x; vertices[5].tex[1] = 1.0f + tex_offs_y;
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// Colours - use this to fade the video in and out
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for (int i = 0; i < (4 * 6); ++i) {
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if ((i%4) < 3)
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vertices[i / 4].colour[i % 4] = mFadeIn;
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else
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vertices[i / 4].colour[i % 4] = 1.0f;
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}
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glEnable(GL_TEXTURE_2D);
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// Build a texture for the video frame
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mTexture->initFromPixels((unsigned char*)mContext.surface->pixels, mContext.surface->w, mContext.surface->h);
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mTexture->bind();
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// Render it
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glEnableClientState(GL_COLOR_ARRAY);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glColorPointer(4, GL_FLOAT, sizeof(Vertex), &vertices[0].colour);
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glVertexPointer(2, GL_FLOAT, sizeof(Vertex), &vertices[0].pos);
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glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), &vertices[0].tex);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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glDisableClientState(GL_COLOR_ARRAY);
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glDisable(GL_TEXTURE_2D);
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}
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}
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void VideoVlcComponent::setupContext()
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{
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if (!mContext.valid)
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{
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// Create an RGBA surface to render the video into
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mContext.surface = SDL_CreateRGBSurface(SDL_SWSURFACE, (int)mVideoWidth, (int)mVideoHeight, 32, 0xff000000, 0x00ff0000, 0x0000ff00, 0x000000ff);
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mContext.mutex = SDL_CreateMutex();
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mContext.valid = true;
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resize();
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}
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}
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void VideoVlcComponent::freeContext()
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{
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if (mContext.valid)
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{
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SDL_FreeSurface(mContext.surface);
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SDL_DestroyMutex(mContext.mutex);
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mContext.valid = false;
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}
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}
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void VideoVlcComponent::setupVLC()
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{
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// If VLC hasn't been initialised yet then do it now
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if (!mVLC)
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{
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const char* args[] = { "--quiet" };
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mVLC = libvlc_new(sizeof(args) / sizeof(args[0]), args);
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}
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}
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void VideoVlcComponent::handleLooping()
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{
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if (mIsPlaying && mMediaPlayer)
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{
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libvlc_state_t state = libvlc_media_player_get_state(mMediaPlayer);
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if (state == libvlc_Ended)
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{
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//libvlc_media_player_set_position(mMediaPlayer, 0.0f);
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libvlc_media_player_set_media(mMediaPlayer, mMedia);
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libvlc_media_player_play(mMediaPlayer);
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}
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}
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}
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void VideoVlcComponent::startVideo()
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{
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if (!mIsPlaying) {
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mVideoWidth = 0;
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mVideoHeight = 0;
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#ifdef WIN32
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std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> wton;
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std::string path = wton.to_bytes(mVideoPath.c_str());
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#else
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std::string path(mVideoPath.c_str());
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#endif
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// Make sure we have a video path
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if (mVLC && (path.size() > 0))
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{
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// Set the video that we are going to be playing so we don't attempt to restart it
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mPlayingVideoPath = mVideoPath;
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// Open the media
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mMedia = libvlc_media_new_path(mVLC, path.c_str());
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if (mMedia)
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{
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unsigned track_count;
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// Get the media metadata so we can find the aspect ratio
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libvlc_media_parse(mMedia);
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libvlc_media_track_t** tracks;
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track_count = libvlc_media_tracks_get(mMedia, &tracks);
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for (unsigned track = 0; track < track_count; ++track)
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{
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if (tracks[track]->i_type == libvlc_track_video)
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{
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mVideoWidth = tracks[track]->video->i_width;
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mVideoHeight = tracks[track]->video->i_height;
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break;
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}
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}
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libvlc_media_tracks_release(tracks, track_count);
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// Make sure we found a valid video track
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if ((mVideoWidth > 0) && (mVideoHeight > 0))
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{
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setupContext();
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// Setup the media player
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mMediaPlayer = libvlc_media_player_new_from_media(mMedia);
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if (!Settings::getInstance()->getBool("VideoAudio"))
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{
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libvlc_audio_set_mute(mMediaPlayer, 1);
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}
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libvlc_media_player_play(mMediaPlayer);
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libvlc_video_set_callbacks(mMediaPlayer, lock, unlock, display, (void*)&mContext);
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libvlc_video_set_format(mMediaPlayer, "RGBA", (int)mVideoWidth, (int)mVideoHeight, (int)mVideoWidth * 4);
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// Update the playing state
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mIsPlaying = true;
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mFadeIn = 0.0f;
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}
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}
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}
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}
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}
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void VideoVlcComponent::stopVideo()
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{
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mIsPlaying = false;
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mStartDelayed = false;
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// Release the media player so it stops calling back to us
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if (mMediaPlayer)
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{
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libvlc_media_player_stop(mMediaPlayer);
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libvlc_media_player_release(mMediaPlayer);
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libvlc_media_release(mMedia);
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mMediaPlayer = NULL;
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freeContext();
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}
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}
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