mpv/video/out/gl_rpi.c

220 lines
6.2 KiB
C
Raw Normal View History

RPI support This requires FFmpeg git master for accelerated hardware decoding. Keep in mind that FFmpeg must be compiled with --enable-mmal. Libav will also work. Most things work. Screenshots don't work with accelerated/opaque decoding (except using full window screenshot mode). Subtitles are very slow - even simple but huge overlays can cause frame drops. This always uses fullscreen mode. It uses dispmanx and mmal directly, and there are no window managers or anything on this level. vo_opengl also kind of works, but is pretty useless and slow. It can't use opaque hardware decoding (copy back can be used by forcing the option --vd=lavc:h264_mmal). Keep in mind that the dispmanx backend is preferred over the X11 ones in case you're trying on X11; but X11 is even more useless on RPI. This doesn't correctly reject extended h264 profiles and thus doesn't fallback to software decoding. The hw supports only up to the high profile, and will e.g. return garbage for Hi10P video. This sets a precedent of enabling hw decoding by default, but only if RPI support is compiled (which most hopefully it will be disabled on desktop Linux platforms). While it's more or less required to use hw decoding on the weak RPI, it causes more problems than it solves on real platforms (Linux has the Intel GPU problem, OSX still has some cases with broken decoding.) So I can live with this compromise of having different defaults depending on the platform. Raspberry Pi 2 is required. This wasn't tested on the original RPI, though at least decoding itself seems to work (but full playback was not tested).
2015-03-29 13:12:11 +00:00
/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*
* You can alternatively redistribute this file and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*/
#include <stddef.h>
#include <assert.h>
#include <bcm_host.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "common/common.h"
#include "x11_common.h"
#include "gl_common.h"
struct priv {
EGLDisplay egl_display;
EGLContext egl_context;
EGLSurface egl_surface;
DISPMANX_DISPLAY_HANDLE_T display;
DISPMANX_ELEMENT_HANDLE_T window;
DISPMANX_UPDATE_HANDLE_T update;
// yep, the API keeps a pointer to it
EGL_DISPMANX_WINDOW_T egl_window;
int w, h;
};
static void *get_proc_address(const GLubyte *name)
{
void *p = eglGetProcAddress(name);
// It looks like eglGetProcAddress() should work even for builtin
// functions, but it doesn't work at least with RPI/Broadcom crap.
// (EGL 1.4, which current RPI firmware pretends to support, definitely
// is required to return non-extension functions.)
if (!p) {
void *h = dlopen("/opt/vc/lib/libGLESv2.so", RTLD_LAZY);
if (h) {
p = dlsym(h, name);
dlclose(h);
}
}
return p;
}
static EGLConfig select_fb_config_egl(struct MPGLContext *ctx)
{
struct priv *p = ctx->priv;
EGLint attributes[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_DEPTH_SIZE, 0,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE
};
EGLint config_count;
EGLConfig config;
eglChooseConfig(p->egl_display, attributes, &config, 1, &config_count);
if (!config_count) {
MP_FATAL(ctx->vo, "Could find EGL configuration!\n");
return NULL;
}
return config;
}
static bool sc_config_window(struct MPGLContext *ctx, int flags)
{
struct priv *p = ctx->priv;
struct vo *vo = ctx->vo;
if (p->egl_context) {
vo->dwidth = p->w;
vo->dheight = p->h;
return true;
}
bcm_host_init();
p->display = vc_dispmanx_display_open(0);
p->update = vc_dispmanx_update_start(0);
if (!p->display || !p->update) {
MP_FATAL(ctx->vo, "Could not get DISPMANX objects.\n");
return false;
}
uint32_t w, h;
if (graphics_get_display_size(0, &w, &h) < 0) {
MP_FATAL(ctx->vo, "Could not get display size.\n");
return false;
}
// dispmanx is like a neanderthal version of Wayland - you can add an
// overlay any place on the screen. Just use the whole screen.
VC_RECT_T dst = {.width = w, .height = h};
VC_RECT_T src = {.width = w << 16, .height = h << 16};
VC_DISPMANX_ALPHA_T alpha = {
.flags = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS,
.opacity = 0xFF,
};
p->window = vc_dispmanx_element_add(p->update, p->display, 1, &dst, 0,
&src, DISPMANX_PROTECTION_NONE, &alpha, 0, 0);
if (!p->window) {
MP_FATAL(ctx->vo, "Could not add DISPMANX element.\n");
return false;
}
vc_dispmanx_update_submit_sync(p->update);
p->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (!eglInitialize(p->egl_display, NULL, NULL)) {
MP_FATAL(ctx->vo, "EGL failed to initialize.\n");
return false;
}
eglBindAPI(EGL_OPENGL_ES_API);
EGLConfig config = select_fb_config_egl(ctx);
if (!config)
return false;
p->egl_window = (EGL_DISPMANX_WINDOW_T){.element = p->window, .width = w, .height = h};
p->egl_surface = eglCreateWindowSurface(p->egl_display, config, &p->egl_window, NULL);
if (p->egl_surface == EGL_NO_SURFACE) {
MP_FATAL(ctx->vo, "Could not create EGL surface!\n");
return false;
}
EGLint context_attributes[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
p->egl_context = eglCreateContext(p->egl_display, config,
EGL_NO_CONTEXT, context_attributes);
if (p->egl_context == EGL_NO_CONTEXT) {
MP_FATAL(ctx->vo, "Could not create EGL context!\n");
return false;
}
eglMakeCurrent(p->egl_display, p->egl_surface, p->egl_surface,
p->egl_context);
const char *exts = eglQueryString(p->egl_display, EGL_EXTENSIONS);
mpgl_load_functions(ctx->gl, get_proc_address, exts, vo->log);
vo->dwidth = p->w = w;
vo->dheight = p->h = h;
return true;
}
static void sc_releaseGlContext(MPGLContext *ctx)
{
struct priv *p = ctx->priv;
if (p->egl_context) {
eglMakeCurrent(p->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
eglDestroyContext(p->egl_display, p->egl_context);
}
p->egl_context = EGL_NO_CONTEXT;
eglTerminate(p->egl_display);
vc_dispmanx_display_close(p->display);
}
static void sc_swapGlBuffers(MPGLContext *ctx)
{
struct priv *p = ctx->priv;
eglSwapBuffers(p->egl_display, p->egl_surface);
}
static int sc_vo_init(struct vo *vo)
{
return 1;
}
static void sc_vo_uninit(struct vo *vo)
{
}
static int sc_vo_control(struct vo *vo, int *events, int request, void *arg)
{
return VO_NOTIMPL;
}
void mpgl_set_backend_rpi(MPGLContext *ctx)
{
ctx->priv = talloc_zero(ctx, struct priv);
ctx->config_window = sc_config_window;
ctx->releaseGlContext = sc_releaseGlContext;
ctx->swapGlBuffers = sc_swapGlBuffers;
ctx->vo_init = sc_vo_init;
ctx->vo_uninit = sc_vo_uninit;
ctx->vo_control = sc_vo_control;
}