vo_opengl: separate hwdec context and mapping, port it to use ra

This does two separate rather intrusive things:

 1. Make the hwdec context (which does initialization, provides the
    device to the decoder, and other basic state) and frame mapping
    (getting textures from a mp_image) separate. This is more
    flexible, and you could map multiple images at once. It will
    help removing some hwdec special-casing from video.c.
 2. Switch all hwdec API use to ra. Of course all code is still
    GL specific, but in theory it would be possible to support other
    backends. The most important change is that the hwdec interop
    returns ra objects, instead of anything GL specific. This removes
    the last dependency on GL-specific header files from video.c.

I'm mixing these separate changes because both requires essentially
rewriting all the glue code, so better do them at once. For the same
reason, this change isn't done incrementally.

hwdec_ios.m is untested, since I can't test it. Apart from superficial
mistakes, this also requires dealing with Apple's texture format
fuckups: they force you to use GL_LUMINANCE[_ALPHA] instead of GL_RED
and GL_RG. We also need to report the correct format via ra_tex to
the renderer, which is done by find_la_variant(). It's unknown whether
this works correctly.

hwdec_rpi.c as well as vo_rpi.c are still broken. (I need to pull my
RPI out of a dusty pile of devices and cables, so, later.)

1 files changed, 76 insertions, 66 deletions

diff --git a/video/out/opengl/hwdec_d3d11eglrgb.c b/video/out/opengl/hwdec_d3d11eglrgb.c
index d1e96cf295..fa3976fec6 100644
--- a/video/out/opengl/hwdec_d3d11eglrgb.c
+++ b/video/out/opengl/hwdec_d3d11eglrgb.c
@@ -28,6 +28,7 @@
 #include "osdep/timer.h"
 #include "osdep/windows_utils.h"
 #include "hwdec.h"
+#include "ra_gl.h"
 #include "video/hwdec.h"
 #include "video/decode/d3d.h"
 
@@ -35,54 +36,38 @@
 #define EGL_D3D_TEXTURE_SUBRESOURCE_ID_ANGLE 0x3AAB
 #endif
 
-struct priv {
+struct priv_owner {
     struct mp_hwdec_ctx hwctx;
 
     ID3D11Device *d3d11_device;
 
     EGLDisplay egl_display;
     EGLConfig  egl_config;
-    EGLSurface egl_surface;
+};
 
+struct priv {
+    EGLSurface egl_surface;
     GLuint gl_texture;
 };
 
-static void unmap(struct gl_hwdec *hw)
+static void uninit(struct ra_hwdec *hw)
 {
-    struct priv *p = hw->priv;
-    if (p->egl_surface) {
-        eglReleaseTexImage(p->egl_display, p->egl_surface, EGL_BACK_BUFFER);
-        eglDestroySurface(p->egl_display, p->egl_surface);
-    }
-    p->egl_surface = NULL;
-}
+    struct priv_owner *p = hw->priv;
 
-static void destroy_objects(struct gl_hwdec *hw)
-{
-    struct priv *p = hw->priv;
-    GL *gl = hw->gl;
-
-    unmap(hw);
-
-    gl->DeleteTextures(1, &p->gl_texture);
-    p->gl_texture = 0;
-}
-
-static void destroy(struct gl_hwdec *hw)
-{
-    struct priv *p = hw->priv;
-
-    destroy_objects(hw);
-
-    hwdec_devices_remove(hw->devs, &p->hwctx);
+    if (p->hwctx.ctx)
+        hwdec_devices_remove(hw->devs, &p->hwctx);
 
     if (p->d3d11_device)
         ID3D11Device_Release(p->d3d11_device);
-    p->d3d11_device = NULL;
 }
 
-static int create(struct gl_hwdec *hw)
+static int init(struct ra_hwdec *hw)
 {
+    struct priv_owner *p = hw->priv;
+    HRESULT hr;
+
+    if (!ra_is_gl(hw->ra))
+        return -1;
     if (!angle_load())
         return -1;
 
@@ -99,10 +84,6 @@ static int create(struct gl_hwdec *hw)
     if (!exts || !strstr(exts, "EGL_ANGLE_d3d_share_handle_client_buffer"))
         return -1;
 
-    HRESULT hr;
-    struct priv *p = talloc_zero(hw, struct priv);
-    hw->priv = p;
-
     p->egl_display = egl_display;
 
     if (!d3d11_D3D11CreateDevice) {
@@ -165,16 +146,21 @@ static int create(struct gl_hwdec *hw)
 
     return 0;
 fail:
-    destroy(hw);
     return -1;
 }
 
-static int reinit(struct gl_hwdec *hw, struct mp_image_params *params)
+static void mapper_uninit(struct ra_hwdec_mapper *mapper)
 {
-    struct priv *p = hw->priv;
-    GL *gl = hw->gl;
+    struct priv *p = mapper->priv;
+    GL *gl = ra_gl_get(mapper->ra);
 
-    destroy_objects(hw);
+    gl->DeleteTextures(1, &p->gl_texture);
+}
+
+static int mapper_init(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+    GL *gl = ra_gl_get(mapper->ra);
 
     gl->GenTextures(1, &p->gl_texture);
     gl->BindTexture(GL_TEXTURE_2D, p->gl_texture);
@@ -184,22 +170,35 @@ static int reinit(struct gl_hwdec *hw, struct mp_image_params *params)
     gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     gl->BindTexture(GL_TEXTURE_2D, 0);
 
-    params->imgfmt = IMGFMT_RGB0;
-    params->hw_subfmt = 0;
+    mapper->dst_params = mapper->src_params;
+    mapper->dst_params.imgfmt = IMGFMT_RGB0;
+    mapper->dst_params.hw_subfmt = 0;
     return 0;
 }
 
-static int map_frame(struct gl_hwdec *hw, struct mp_image *hw_image,
-                     struct gl_hwdec_frame *out_frame)
+static void mapper_unmap(struct ra_hwdec_mapper *mapper)
+{
+    struct priv_owner *o = mapper->owner->priv;
+    struct priv *p = mapper->priv;
+    ra_tex_free(mapper->ra, &mapper->tex[0]);
+    if (p->egl_surface) {
+        eglReleaseTexImage(o->egl_display, p->egl_surface, EGL_BACK_BUFFER);
+        eglDestroySurface(o->egl_display, p->egl_surface);
+    }
+    p->egl_surface = NULL;
+}
+
+static int mapper_map(struct ra_hwdec_mapper *mapper)
 {
-    struct priv *p = hw->priv;
-    GL *gl = hw->gl;
+    struct priv_owner *o = mapper->owner->priv;
+    struct priv *p = mapper->priv;
+    GL *gl = ra_gl_get(mapper->ra);
     HRESULT hr;
 
     if (!p->gl_texture)
         return -1;
 
-    ID3D11Texture2D *d3d_tex = (void *)hw_image->planes[0];
+    ID3D11Texture2D *d3d_tex = (void *)mapper->src->planes[0];
     if (!d3d_tex)
         return -1;
 
@@ -229,37 +228,48 @@ static int map_frame(struct gl_hwdec *hw, struct mp_image *hw_image,
         EGL_NONE
     };
     p->egl_surface = eglCreatePbufferFromClientBuffer(
-        p->egl_display, EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE,
-        share_handle, p->egl_config, attrib_list);
+        o->egl_display, EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE,
+        share_handle, o->egl_config, attrib_list);
     if (p->egl_surface == EGL_NO_SURFACE) {
-        MP_ERR(hw, "Failed to create EGL surface\n");
+        MP_ERR(mapper, "Failed to create EGL surface\n");
         return -1;
     }
 
     gl->BindTexture(GL_TEXTURE_2D, p->gl_texture);
-    eglBindTexImage(p->egl_display, p->egl_surface, EGL_BACK_BUFFER);
+    eglBindTexImage(o->egl_display, p->egl_surface, EGL_BACK_BUFFER);
     gl->BindTexture(GL_TEXTURE_2D, 0);
 
-    *out_frame = (struct gl_hwdec_frame){
-        .planes = {
-            {
-                .gl_texture = p->gl_texture,
-                .gl_target = GL_TEXTURE_2D,
-                .tex_w = texdesc.Width,
-                .tex_h = texdesc.Height,
-            },
-        },
+    struct ra_tex_params params = {
+        .dimensions = 2,
+        .w = mapper->src_params.w,
+        .h = mapper->src_params.h,
+        .d = 1,
+        .format = ra_find_unorm_format(mapper->ra, 1, 4),
+        .render_src = true,
+        .src_linear = true,
     };
+    if (!params.format)
+        return -1;
+
+    mapper->tex[0] = ra_create_wrapped_tex(mapper->ra, &params, p->gl_texture);
+    if (!mapper->tex[0])
+        return -1;
+
     return 0;
 }
 
-const struct gl_hwdec_driver gl_hwdec_d3d11eglrgb = {
+const struct ra_hwdec_driver ra_hwdec_d3d11eglrgb = {
     .name = "d3d11-egl-rgb",
+    .priv_size = sizeof(struct priv_owner),
     .api = HWDEC_D3D11VA,
-    .imgfmt = IMGFMT_D3D11RGB,
-    .create = create,
-    .reinit = reinit,
-    .map_frame = map_frame,
-    .unmap = unmap,
-    .destroy = destroy,
+    .imgfmts = {IMGFMT_D3D11RGB, 0},
+    .init = init,
+    .uninit = uninit,
+    .mapper = &(const struct ra_hwdec_mapper_driver){
+        .priv_size = sizeof(struct priv),
+        .init = mapper_init,
+        .uninit = mapper_uninit,
+        .map = mapper_map,
+        .unmap = mapper_unmap,
+    },
 };