bool
VideoInput::switchInput(const std::string& resource)
{
DEBUG("MRL: '%s'", resource.c_str());
if (switchPending_) {
ERROR("Video switch already requested");
return false;
}
// Switch off video input?
if (resource.empty()) {
clearOptions();
switchPending_ = true;
if (!loop_.isRunning())
loop_.start();
return true;
}
// Supported MRL schemes
static const std::string sep = "://";
const auto pos = resource.find(sep);
if (pos == std::string::npos)
return false;
const auto prefix = resource.substr(0, pos);
if ((pos + sep.size()) >= resource.size())
return false;
const auto suffix = resource.substr(pos + sep.size());
bool valid = false;
if (prefix == "v4l2") {
/* Video4Linux2 */
valid = initCamera(suffix);
} else if (prefix == "display") {
/* X11 display name */
valid = initX11(suffix);
} else if (prefix == "file") {
/* Pathname */
valid = initFile(suffix);
}
/* Unsupported MRL or failed initialization */
if (valid) {
switchPending_ = true;
if (!loop_.isRunning())
loop_.start();
}
else
ERROR("Failed to init input for MRL '%s'\n", resource.c_str());
return valid;
}
void eglInit(int width, int height)
{
m_width = width;
m_height = height;
#ifdef EGL_USE_X11
initX11();
#else
initEglOnly();
#endif
EGLint ContextAttribList[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
m_eglcontext = eglCreateContext( m_egldisplay, m_eglconfig, EGL_NO_CONTEXT, ContextAttribList);
eglMakeCurrent(m_egldisplay, m_eglsurface, m_eglsurface, m_eglcontext);
EGLint h, w;
eglQuerySurface(m_egldisplay, m_eglsurface, EGL_WIDTH, &w);
eglQuerySurface(m_egldisplay, m_eglsurface, EGL_HEIGHT, &h);
m_ymax = 0.1f * tan(45.0f * M_PI/360.0f);
m_ymin = -m_ymax;
m_xmin = m_ymin * ((GLfloat)w/(GLfloat)h);
m_xmax = m_ymax * ((GLfloat)w/(GLfloat)h);
}
int initEGL(int n_buf)
{
#ifdef GLES_20
EGLint context_attr[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
#else
typedef NativeDisplayType EGLNativeDisplayType;
typedef NativeWindowType EGLNativeWindowType;
#endif
EGLint disp_w, disp_h;
EGLNativeDisplayType disp_type;
EGLNativeWindowType window;
EGLConfig cfgs[2];
EGLint n_cfgs;
EGLint egl_attr[] = {
EGL_BUFFER_SIZE, EGL_DONT_CARE,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_DEPTH_SIZE, 8,
#ifdef GLES_20
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
#endif
EGL_NONE };
#ifdef X11
if (initX11(&disp_w, &disp_h))
return -1;
disp_type = (EGLNativeDisplayType)x11Display;
window = (EGLNativeWindowType)x11Window;
#else
if (get_disp_resolution(&disp_w, &disp_h)) {
printf("ERROR: get display resolution failed\n");
return -1;
}
printf("\n\nliuxu, 04/21/2014, get_disp_resolution, disp_w=%d, disp_h=%d\n\n", disp_w, disp_h);
disp_type = (EGLNativeDisplayType)EGL_DEFAULT_DISPLAY;
window = 0;
#endif
dpy = eglGetDisplay(disp_type);
if (eglInitialize(dpy, NULL, NULL) != EGL_TRUE) {
print_err("eglInitialize");
return -1;
}
if (eglGetConfigs(dpy, cfgs, 2, &n_cfgs) != EGL_TRUE) {
print_err("eglGetConfigs");
goto cleanup;
}
if (eglChooseConfig(dpy, egl_attr, cfgs, 2, &n_cfgs) != EGL_TRUE) {
print_err("eglChooseConfig");
goto cleanup;
}
surface = eglCreateWindowSurface(dpy, cfgs[0], window, NULL);
if (surface == EGL_NO_SURFACE) {
print_err("eglCreateWindowSurface");
goto cleanup;
}
#ifdef GLES_20
context = eglCreateContext(dpy, cfgs[0], EGL_NO_CONTEXT, context_attr);
#else
context = eglCreateContext(dpy, cfgs[0], EGL_NO_CONTEXT, NULL);
#endif
if (context == EGL_NO_CONTEXT) {
print_err("eglCreateContext");
goto cleanup;
}
if (eglMakeCurrent(dpy, surface, surface, context) != EGL_TRUE) {
print_err("eglMakeCurrent");
goto cleanup;
}
/* 0 - do not sync with video frame */
if (profiling == TRUE) {
if (eglSwapInterval(dpy, 0) != EGL_TRUE) {
print_err("eglSwapInterval");
goto cleanup;
}
}
#ifndef GLES_20
glShadeModel(GL_FLAT);
glTexParameterf(GL_TEXTURE_STREAM_IMG, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_STREAM_IMG, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFrontFace(GL_CW);
glCullFace(GL_FRONT);
glEnable(GL_CULL_FACE);
glEnable(GL_NORMALIZE);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrthof(-CUBE_V_LEN * disp_w / disp_h, CUBE_V_LEN * disp_w / disp_h,
-CUBE_V_LEN, CUBE_V_LEN, -CUBE_V_LEN * 2, CUBE_V_LEN * 2);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
#endif
return 0;
cleanup:
deInitEGL(n_buf);
#ifdef X11
deInitX11();
#endif
return -1;
}
