vo_gpu_next: factor out context-specific code to gpu_next/context.c

This is done to avoid cluttering vo_gpu_next.c with more ifdeffery and context-specific code
when additional backends are added in the near future.
Eventually gpu_ctx is intended to take the place of ra_ctx to further separate gpu and gpu_next.

meson.build

@@ -979,7 +979,8 @@ if libplacebo.found()
         features += 'libplacebo-v4'
         libplacebo_v4 = true
         message('libplacebo v4.170+ found! Enabling vo_gpu_next.')
-        sources += files('video/out/vo_gpu_next.c')
+        sources += files('video/out/vo_gpu_next.c',
+                         'video/out/gpu_next/context.c')
     else
         message('libplacebo v4.170+ not found! Disabling vo_gpu_next.')
     endif

video/out/gpu_next/context.c

@@ -0,0 +1,80 @@
+/*
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include <libplacebo/config.h>
+
+#include "context.h"
+#include "config.h"
+#include "common/common.h"
+#include "options/m_config.h"
+#include "video/out/placebo/utils.h"
+#include "video/out/gpu/video.h"
+
+#if HAVE_VULKAN
+#include "video/out/vulkan/context.h"
+#endif
+
+struct priv {
+    char dummy;
+};
+
+struct gpu_ctx *gpu_ctx_create(struct vo *vo, struct gl_video_opts *gl_opts)
+{
+    struct gpu_ctx *ctx = talloc_zero(NULL, struct gpu_ctx);
+    ctx->log = vo->log;
+    ctx->priv = talloc_zero(ctx, struct priv);
+
+    struct ra_ctx_opts *ctx_opts = mp_get_config_group(ctx, vo->global, &ra_ctx_conf);
+    ctx_opts->want_alpha = gl_opts->alpha_mode == ALPHA_YES;
+    ctx->ra_ctx = ra_ctx_create(vo, *ctx_opts);
+    if (!ctx->ra_ctx)
+        goto err_out;
+
+#if HAVE_VULKAN
+    struct mpvk_ctx *vkctx = ra_vk_ctx_get(ctx->ra_ctx);
+    if (vkctx) {
+        ctx->pllog = vkctx->ctx;
+        ctx->gpu = vkctx->gpu;
+        ctx->swapchain = vkctx->swapchain;
+        return ctx;
+    }
+#endif
+
+    // TODO: wrap GL contexts
+
+err_out:
+    gpu_ctx_destroy(&ctx);
+    return NULL;
+}
+
+bool gpu_ctx_resize(struct gpu_ctx *ctx, int w, int h)
+{
+    // Not (yet) used
+    return true;
+}
+
+void gpu_ctx_destroy(struct gpu_ctx **ctxp)
+{
+    struct gpu_ctx *ctx = *ctxp;
+    if (!ctx)
+        return;
+
+    ra_ctx_destroy(&ctx->ra_ctx);
+
+    talloc_free(ctx);
+    *ctxp = NULL;
+}

video/out/gpu_next/context.h

@@ -0,0 +1,41 @@
+/*
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <libplacebo/renderer.h>
+
+struct mp_log;
+struct ra_ctx;
+struct vo;
+struct gl_video_opts;
+
+struct gpu_ctx {
+    struct mp_log *log;
+
+    struct ra_ctx *ra_ctx;
+
+    pl_log pllog;
+    pl_gpu gpu;
+    pl_swapchain swapchain;
+
+    void *priv;
+};
+
+struct gpu_ctx *gpu_ctx_create(struct vo *vo, struct gl_video_opts *gl_opts);
+bool gpu_ctx_resize(struct gpu_ctx *ctx, int w, int h);
+void gpu_ctx_destroy(struct gpu_ctx **ctxp);

video/out/vo_gpu_next.c

@@ -39,10 +39,7 @@
 #include "gpu/video.h"
 #include "gpu/video_shaders.h"
 #include "sub/osd.h"
-
-#if HAVE_VULKAN
-#include "vulkan/context.h"
-#endif
+#include "gpu_next/context.h"
 
 struct osd_entry {
     pl_tex tex;
@@ -77,6 +74,7 @@ struct priv {
     struct mp_log *log;
     struct mpv_global *global;
     struct ra_ctx *ra_ctx;
+    struct gpu_ctx *context;
 
     pl_log pllog;
     pl_gpu gpu;
@@ -809,6 +807,7 @@ static void resize(struct vo *vo)
 {
     struct priv *p = vo->priv;
     vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd_res);
+    gpu_ctx_resize(p->context, vo->dwidth, vo->dheight);
     vo->want_redraw = true;
 }
 
@@ -966,7 +965,12 @@ static void uninit(struct vo *vo)
     }
 
     pl_renderer_destroy(&p->rr);
-    ra_ctx_destroy(&p->ra_ctx);
+
+    p->ra_ctx = NULL;
+    p->pllog = NULL;
+    p->gpu = NULL;
+    p->sw = NULL;
+    gpu_ctx_destroy(&p->context);
 }
 
 static int preinit(struct vo *vo)
@@ -978,30 +982,16 @@ static int preinit(struct vo *vo)
     p->log = vo->log;
 
     struct gl_video_opts *gl_opts = p->opts_cache->opts;
-    struct ra_ctx_opts *ctx_opts = mp_get_config_group(p, vo->global, &ra_ctx_conf);
-    struct ra_ctx_opts opts = *ctx_opts;
-    opts.context_type = "vulkan";
-    opts.context_name = NULL;
-    opts.want_alpha = gl_opts->alpha_mode == ALPHA_YES;
-    p->ra_ctx = ra_ctx_create(vo, opts);
-    if (!p->ra_ctx)
+
+    p->context = gpu_ctx_create(vo, gl_opts);
+    if (!p->context)
         goto err_out;
+    // For the time being
+    p->ra_ctx = p->context->ra_ctx;
+    p->pllog = p->context->pllog;
+    p->gpu = p->context->gpu;
+    p->sw = p->context->swapchain;
 
-#if HAVE_VULKAN
-    struct mpvk_ctx *vkctx = ra_vk_ctx_get(p->ra_ctx);
-    if (vkctx) {
-        p->pllog = vkctx->ctx;
-        p->gpu = vkctx->gpu;
-        p->sw = vkctx->swapchain;
-        goto done;
-    }
-#endif
-
-    // TODO: wrap GL contexts
-
-    goto err_out;
-
-done:
     p->rr = pl_renderer_create(p->pllog, p->gpu);
     p->queue = pl_queue_create(p->gpu);
     p->osd_fmt[SUBBITMAP_LIBASS] = pl_find_named_fmt(p->gpu, "r8");

wscript_build.py

@@ -451,6 +451,7 @@ def build(ctx):
         ( "video/out/gpu/utils.c" ),
         ( "video/out/gpu/video.c" ),
         ( "video/out/gpu/video_shaders.c" ),
+        ( "video/out/gpu_next/context.c",        "libplacebo-v4" ),
         ( "video/out/hwdec/hwdec_cuda.c",        "cuda-interop" ),
         ( "video/out/hwdec/hwdec_cuda_gl.c",     "cuda-interop && gl" ),
         ( "video/out/hwdec/hwdec_cuda_vk.c",     "cuda-interop && vulkan" ),