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mpv/video/out/gpu/context.c

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/*
* 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 <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#include <assert.h>
#include "config.h"
#include "common/common.h"
#include "common/msg.h"
#include "options/options.h"
#include "options/m_option.h"
#include "video/out/vo.h"
#include "context.h"
#include "spirv.h"
/* OpenGL */
extern const struct ra_ctx_fns ra_ctx_glx;
extern const struct ra_ctx_fns ra_ctx_x11_egl;
extern const struct ra_ctx_fns ra_ctx_drm_egl;
extern const struct ra_ctx_fns ra_ctx_wayland_egl;
extern const struct ra_ctx_fns ra_ctx_wgl;
extern const struct ra_ctx_fns ra_ctx_angle;
extern const struct ra_ctx_fns ra_ctx_dxgl;
extern const struct ra_ctx_fns ra_ctx_android;
/* Vulkan */
extern const struct ra_ctx_fns ra_ctx_vulkan_wayland;
extern const struct ra_ctx_fns ra_ctx_vulkan_win;
extern const struct ra_ctx_fns ra_ctx_vulkan_xlib;
extern const struct ra_ctx_fns ra_ctx_vulkan_android;
extern const struct ra_ctx_fns ra_ctx_vulkan_display;
extern const struct ra_ctx_fns ra_ctx_vulkan_mac;
/* Direct3D 11 */
extern const struct ra_ctx_fns ra_ctx_d3d11;
/* No API */
extern const struct ra_ctx_fns ra_ctx_wldmabuf;
/* Autoprobe dummy. Always fails to create. */
static bool dummy_init(struct ra_ctx *ctx)
{
return false;
}
static void dummy_uninit(struct ra_ctx *ctx)
{
}
static const struct ra_ctx_fns ra_ctx_dummy = {
.type = "auto",
.name = "auto",
.description = "Auto detect",
.init = dummy_init,
.uninit = dummy_uninit,
};
static const struct ra_ctx_fns *contexts[] = {
&ra_ctx_dummy,
// Direct3D contexts:
#if HAVE_D3D11
&ra_ctx_d3d11,
#endif
// OpenGL contexts:
#if HAVE_EGL_ANDROID
&ra_ctx_android,
#endif
#if HAVE_EGL_ANGLE_WIN32
&ra_ctx_angle,
#endif
#if HAVE_GL_WIN32
&ra_ctx_wgl,
#endif
#if HAVE_GL_DXINTEROP
&ra_ctx_dxgl,
#endif
#if HAVE_EGL_WAYLAND
&ra_ctx_wayland_egl,
#endif
#if HAVE_EGL_X11
&ra_ctx_x11_egl,
#endif
#if HAVE_GL_X11
&ra_ctx_glx,
#endif
#if HAVE_EGL_DRM
&ra_ctx_drm_egl,
#endif
// Vulkan contexts:
#if HAVE_VULKAN
#if HAVE_ANDROID
&ra_ctx_vulkan_android,
#endif
#if HAVE_WIN32_DESKTOP
&ra_ctx_vulkan_win,
#endif
#if HAVE_WAYLAND
&ra_ctx_vulkan_wayland,
#endif
#if HAVE_X11
&ra_ctx_vulkan_xlib,
#endif
#if HAVE_VK_KHR_DISPLAY
&ra_ctx_vulkan_display,
#endif
#if HAVE_COCOA && HAVE_SWIFT
&ra_ctx_vulkan_mac,
#endif
#endif
};
static const struct ra_ctx_fns *no_api_contexts[] = {
&ra_ctx_dummy,
/* No API contexts: */
#if HAVE_DMABUF_WAYLAND
&ra_ctx_wldmabuf,
#endif
};
static bool get_desc(struct m_obj_desc *dst, int index)
{
if (index >= MP_ARRAY_SIZE(contexts))
return false;
const struct ra_ctx_fns *ctx = contexts[index];
*dst = (struct m_obj_desc) {
.name = ctx->name,
.description = ctx->description,
};
return true;
}
static bool check_unknown_entry(const char *name)
{
return false;
}
const struct m_obj_list ra_ctx_obj_list = {
.get_desc = get_desc,
.check_unknown_entry = check_unknown_entry,
.description = "GPU contexts",
.allow_trailer = true,
.disallow_positional_parameters = true,
.use_global_options = true,
};
static bool get_type_desc(struct m_obj_desc *dst, int index)
{
int api_index = 0;
for (int i = 0; i < MP_ARRAY_SIZE(contexts); i++) {
if (i && strcmp(contexts[i - 1]->type, contexts[i]->type))
api_index++;
if (api_index == index) {
*dst = (struct m_obj_desc) {
.name = contexts[i]->type,
.description = "",
};
return true;
}
}
return false;
}
static void print_context_apis(struct mp_log *log)
{
mp_info(log, "Available GPU APIs and contexts:\n");
for (int n = 0; n < MP_ARRAY_SIZE(contexts); n++) {
mp_info(log, " %s %s\n", contexts[n]->type, contexts[n]->name);
}
}
const struct m_obj_list ra_ctx_type_obj_list = {
.get_desc = get_type_desc,
.check_unknown_entry = check_unknown_entry,
.description = "GPU APIs",
.allow_trailer = true,
.disallow_positional_parameters = true,
.use_global_options = true,
.print_help_list = print_context_apis,
};
#define OPT_BASE_STRUCT struct ra_ctx_opts
const struct m_sub_options ra_ctx_conf = {
.opts = (const m_option_t[]) {
{"gpu-context",
OPT_SETTINGSLIST(context_list, &ra_ctx_obj_list)},
{"gpu-api",
OPT_SETTINGSLIST(context_type_list, &ra_ctx_type_obj_list)},
{"gpu-debug", OPT_BOOL(debug)},
{"gpu-sw", OPT_BOOL(allow_sw)},
{0}
},
.size = sizeof(struct ra_ctx_opts),
.change_flags = UPDATE_VO,
};
static struct ra_ctx *create_in_contexts(struct vo *vo, const char *name,
struct m_obj_settings *context_type_list,
const struct ra_ctx_fns *ctxs[], size_t size,
struct ra_ctx_opts opts)
{
for (int i = 0; i < size; i++) {
if (strcmp(name, ctxs[i]->name) != 0)
continue;
if (context_type_list) {
bool found = false;
for (int j = 0; context_type_list[j].name; j++) {
if (strcmp(context_type_list[j].name, "auto") == 0 ||
strcmp(context_type_list[j].name, ctxs[i]->type) == 0) {
found = true;
break;
}
}
if (!found)
continue;
}
struct ra_ctx *ctx = talloc_ptrtype(NULL, ctx);
*ctx = (struct ra_ctx) {
.vo = vo,
.global = vo->global,
.log = mp_log_new(ctx, vo->log, ctxs[i]->type),
.opts = opts,
.fns = ctxs[i],
};
MP_VERBOSE(ctx, "Initializing GPU context '%s'\n", ctx->fns->name);
if (ctxs[i]->init(ctx))
return ctx;
talloc_free(ctx);
}
return NULL;
}
struct ra_ctx *ra_ctx_create_by_name(struct vo *vo, const char *name)
{
struct ra_ctx_opts dummy = {0};
struct ra_ctx *ctx = create_in_contexts(vo, name, NULL, contexts,
MP_ARRAY_SIZE(contexts), dummy);
if (ctx)
return ctx;
return create_in_contexts(vo, name, NULL, no_api_contexts,
MP_ARRAY_SIZE(no_api_contexts), dummy);
}
// Create a VO window and create a RA context on it.
// vo_flags: passed to the backend's create window function
struct ra_ctx *ra_ctx_create(struct vo *vo, struct ra_ctx_opts opts)
{
bool ctx_auto = !opts.context_list ||
(opts.context_list[0].name &&
strcmp(opts.context_list[0].name, "auto") == 0);
if (ctx_auto) {
MP_VERBOSE(vo, "Probing for best GPU context.\n");
opts.probing = true;
}
// Hack to silence backend (X11/Wayland/etc.) errors. Kill it once backends
// are separate from `struct vo`
bool old_probing = vo->probing;
vo->probing = opts.probing;
struct ra_ctx *ctx = NULL;
if (opts.probing) {
struct m_obj_settings context_type_list[2] = {{.name = "auto"}, {0}};
for (int i = 0;
opts.context_type_list ? opts.context_type_list[i].name != NULL : i == 0;
i++) {
for (int j = 0; j < MP_ARRAY_SIZE(contexts); j++) {
if (opts.context_type_list)
context_type_list[0].name = opts.context_type_list[i].name;
ctx = create_in_contexts(vo, contexts[j]->name, context_type_list,
contexts, MP_ARRAY_SIZE(contexts),
opts);
if (ctx)
goto done;
}
}
}
for (int i = 0; opts.context_list && opts.context_list[i].name; i++) {
ctx = create_in_contexts(vo, opts.context_list[i].name,
opts.context_type_list, contexts,
MP_ARRAY_SIZE(contexts), opts);
if (ctx)
goto done;
}
done:
if (ctx) {
vo->probing = old_probing;
vo->context_name = ctx->fns->name;
return ctx;
}
vo->probing = old_probing;
// If we've reached this point, then none of the contexts matched the name
// requested, or the backend creation failed for all of them.
if (!vo->probing)
MP_ERR(vo, "Failed initializing any suitable GPU context!\n");
return NULL;
}
void ra_ctx_destroy(struct ra_ctx **ctx_ptr)
{
struct ra_ctx *ctx = *ctx_ptr;
if (!ctx)
return;
if (ctx->spirv && ctx->spirv->fns->uninit)
ctx->spirv->fns->uninit(ctx);
ctx->fns->uninit(ctx);
talloc_free(ctx);
*ctx_ptr = NULL;
}
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