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/*
* Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it 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.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <IOSurface/IOSurface.h>
#include <CoreVideo/CoreVideo.h>
#include <OpenGL/OpenGL.h>
#include <OpenGL/CGLIOSurface.h>
#include <libavutil/hwcontext.h>
#include "video/mp_image_pool.h"
#include "video/out/gpu/hwdec.h"
#include "video/out/opengl/ra_gl.h"
#include "hwdec_vt.h"
static bool check_hwdec(const struct ra_hwdec *hw)
{
if (!ra_is_gl(hw->ra_ctx->ra))
return false;
GL *gl = ra_gl_get(hw->ra_ctx->ra);
if (gl->version < 300) {
MP_ERR(hw, "need >= OpenGL 3.0 for core rectangle texture support\n");
return false;
}
if (!CGLGetCurrentContext()) {
MP_ERR(hw, "need cocoa opengl backend to be active");
return false;
}
return true;
}
static int mapper_init(struct ra_hwdec_mapper *mapper)
{
struct priv *p = mapper->priv;
GL *gl = ra_gl_get(mapper->ra);
gl->GenTextures(MP_MAX_PLANES, p->gl_planes);
for (int n = 0; n < p->desc.num_planes; n++) {
if (p->desc.planes[n]->ctype != RA_CTYPE_UNORM) {
MP_ERR(mapper, "Format unsupported.\n");
return -1;
}
}
return 0;
}
static void mapper_unmap(struct ra_hwdec_mapper *mapper)
{
struct priv *p = mapper->priv;
// Is this sane? No idea how to release the texture without deleting it.
CVPixelBufferRelease(p->pbuf);
p->pbuf = NULL;
for (int i = 0; i < p->desc.num_planes; i++)
ra_tex_free(mapper->ra, &mapper->tex[i]);
}
static int mapper_map(struct ra_hwdec_mapper *mapper)
{
struct priv *p = mapper->priv;
GL *gl = ra_gl_get(mapper->ra);
CVPixelBufferRelease(p->pbuf);
p->pbuf = (CVPixelBufferRef)mapper->src->planes[3];
CVPixelBufferRetain(p->pbuf);
IOSurfaceRef surface = CVPixelBufferGetIOSurface(p->pbuf);
if (!surface) {
MP_ERR(mapper, "CVPixelBuffer has no IOSurface\n");
return -1;
}
const bool planar = CVPixelBufferIsPlanar(p->pbuf);
const int planes = CVPixelBufferGetPlaneCount(p->pbuf);
assert((planar && planes == p->desc.num_planes) || p->desc.num_planes == 1);
GLenum gl_target = GL_TEXTURE_RECTANGLE;
for (int i = 0; i < p->desc.num_planes; i++) {
const struct ra_format *fmt = p->desc.planes[i];
GLint internal_format;
GLenum format;
GLenum type;
ra_gl_get_format(fmt, &internal_format, &format, &type);
gl->BindTexture(gl_target, p->gl_planes[i]);
CGLError err = CGLTexImageIOSurface2D(
CGLGetCurrentContext(), gl_target,
internal_format,
IOSurfaceGetWidthOfPlane(surface, i),
IOSurfaceGetHeightOfPlane(surface, i),
format, type, surface, i);
gl->BindTexture(gl_target, 0);
if (err != kCGLNoError) {
MP_ERR(mapper,
"error creating IOSurface texture for plane %d: %s (%x)\n",
i, CGLErrorString(err), gl->GetError());
return -1;
}
struct ra_tex_params params = {
.dimensions = 2,
.w = IOSurfaceGetWidthOfPlane(surface, i),
.h = IOSurfaceGetHeightOfPlane(surface, i),
.d = 1,
.format = fmt,
.render_src = true,
.src_linear = true,
.non_normalized = gl_target == GL_TEXTURE_RECTANGLE,
};
mapper->tex[i] = ra_create_wrapped_tex(mapper->ra, ¶ms,
p->gl_planes[i]);
if (!mapper->tex[i])
return -1;
}
return 0;
}
static void mapper_uninit(struct ra_hwdec_mapper *mapper)
{
struct priv *p = mapper->priv;
GL *gl = ra_gl_get(mapper->ra);
gl->DeleteTextures(MP_MAX_PLANES, p->gl_planes);
}
bool vt_gl_init(const struct ra_hwdec *hw)
{
struct priv_owner *p = hw->priv;
if (!check_hwdec(hw))
return false;
p->interop_init = mapper_init;
p->interop_uninit = mapper_uninit;
p->interop_map = mapper_map;
p->interop_unmap = mapper_unmap;
return true;
}
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