vo_gpu: vulkan: use libplacebo instead

This commit rips out the entire mpv vulkan implementation in favor of
exposing lightweight wrappers on top of libplacebo instead, which
provides much of the same except in a more up-to-date and polished form.

This (finally) unifies the code base between mpv and libplacebo, which
is something I've been hoping to do for a long time.

Note: The ra_pl wrappers are abstract enough from the actual libplacebo
device type that we can in theory re-use them for other devices like
d3d11 or even opengl in the future, so I moved them to a separate
directory for the time being. However, the rest of the code is still
vulkan-specific, so I've kept the "vulkan" naming and file paths, rather
than introducing a new `--gpu-api` type. (Which would have been ended up
with significantly more code duplicaiton)

Plus, the code and functionality is similar enough that for most users
this should just be a straight-up drop-in replacement.

Note: This commit excludes some changes; specifically, the updates to
context_win and hwdec_cuda are deferred to separate commits for
authorship reasons.

1 files changed, 25 insertions, 965 deletions

diff --git a/video/out/vulkan/utils.c b/video/out/vulkan/utils.c
index 62ac3e87f9..7d9c519c12 100644
--- a/video/out/vulkan/utils.c
+++ b/video/out/vulkan/utils.c
@@ -1,986 +1,46 @@
-#include <libavutil/macros.h>
-
-#include "video/out/gpu/spirv.h"
+#include "video/out/placebo/utils.h"
 #include "utils.h"
-#include "malloc.h"
-
-const char* vk_err(VkResult res)
-{
-    switch (res) {
-    // These are technically success codes, but include them nonetheless
-    case VK_SUCCESS:     return "VK_SUCCESS";
-    case VK_NOT_READY:   return "VK_NOT_READY";
-    case VK_TIMEOUT:     return "VK_TIMEOUT";
-    case VK_EVENT_SET:   return "VK_EVENT_SET";
-    case VK_EVENT_RESET: return "VK_EVENT_RESET";
-    case VK_INCOMPLETE:  return "VK_INCOMPLETE";
-    case VK_SUBOPTIMAL_KHR: return "VK_SUBOPTIMAL_KHR";
-
-    // Actual error codes
-    case VK_ERROR_OUT_OF_HOST_MEMORY:    return "VK_ERROR_OUT_OF_HOST_MEMORY";
-    case VK_ERROR_OUT_OF_DEVICE_MEMORY:  return "VK_ERROR_OUT_OF_DEVICE_MEMORY";
-    case VK_ERROR_INITIALIZATION_FAILED: return "VK_ERROR_INITIALIZATION_FAILED";
-    case VK_ERROR_DEVICE_LOST:           return "VK_ERROR_DEVICE_LOST";
-    case VK_ERROR_MEMORY_MAP_FAILED:     return "VK_ERROR_MEMORY_MAP_FAILED";
-    case VK_ERROR_LAYER_NOT_PRESENT:     return "VK_ERROR_LAYER_NOT_PRESENT";
-    case VK_ERROR_EXTENSION_NOT_PRESENT: return "VK_ERROR_EXTENSION_NOT_PRESENT";
-    case VK_ERROR_FEATURE_NOT_PRESENT:   return "VK_ERROR_FEATURE_NOT_PRESENT";
-    case VK_ERROR_INCOMPATIBLE_DRIVER:   return "VK_ERROR_INCOMPATIBLE_DRIVER";
-    case VK_ERROR_TOO_MANY_OBJECTS:      return "VK_ERROR_TOO_MANY_OBJECTS";
-    case VK_ERROR_FORMAT_NOT_SUPPORTED:  return "VK_ERROR_FORMAT_NOT_SUPPORTED";
-    case VK_ERROR_FRAGMENTED_POOL:       return "VK_ERROR_FRAGMENTED_POOL";
-    case VK_ERROR_INVALID_SHADER_NV:     return "VK_ERROR_INVALID_SHADER_NV";
-    case VK_ERROR_OUT_OF_DATE_KHR:       return "VK_ERROR_OUT_OF_DATE_KHR";
-    case VK_ERROR_SURFACE_LOST_KHR:      return "VK_ERROR_SURFACE_LOST_KHR";
-    }
-
-    return "Unknown error!";
-}
-
-static const char* vk_dbg_type(VkDebugReportObjectTypeEXT type)
-{
-    switch (type) {
-    case VK_DEBUG_REPORT_OBJECT_TYPE_INSTANCE_EXT:
-        return "VkInstance";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_PHYSICAL_DEVICE_EXT:
-        return "VkPhysicalDevice";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_EXT:
-        return "VkDevice";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_QUEUE_EXT:
-        return "VkQueue";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_SEMAPHORE_EXT:
-        return "VkSemaphore";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT:
-        return "VkCommandBuffer";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_FENCE_EXT:
-        return "VkFence";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_MEMORY_EXT:
-        return "VkDeviceMemory";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_EXT:
-        return "VkBuffer";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT:
-        return "VkImage";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_EVENT_EXT:
-        return "VkEvent";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_QUERY_POOL_EXT:
-        return "VkQueryPool";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_VIEW_EXT:
-        return "VkBufferView";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_VIEW_EXT:
-        return "VkImageView";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_SHADER_MODULE_EXT:
-        return "VkShaderModule";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_CACHE_EXT:
-        return "VkPipelineCache";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_LAYOUT_EXT:
-        return "VkPipelineLayout";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_RENDER_PASS_EXT:
-        return "VkRenderPass";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_EXT:
-        return "VkPipeline";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_LAYOUT_EXT:
-        return "VkDescriptorSetLayout";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_EXT:
-        return "VkSampler";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_POOL_EXT:
-        return "VkDescriptorPool";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_EXT:
-        return "VkDescriptorSet";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_FRAMEBUFFER_EXT:
-        return "VkFramebuffer";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_POOL_EXT:
-        return "VkCommandPool";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_SURFACE_KHR_EXT:
-        return "VkSurfaceKHR";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_SWAPCHAIN_KHR_EXT:
-        return "VkSwapchainKHR";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_DEBUG_REPORT_EXT:
-        return "VkDebugReportCallbackEXT";
-    case VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT:
-    default:
-        return "unknown object";
-    }
-}
-
-static VkBool32 vk_dbg_callback(VkDebugReportFlagsEXT flags,
-                                VkDebugReportObjectTypeEXT objType,
-                                uint64_t obj, size_t loc, int32_t msgCode,
-                                const char *layer, const char *msg, void *priv)
-{
-    struct mpvk_ctx *vk = priv;
-    int lev = MSGL_V;
-
-    switch (flags) {
-    case VK_DEBUG_REPORT_ERROR_BIT_EXT:               lev = MSGL_ERR;   break;
-    case VK_DEBUG_REPORT_WARNING_BIT_EXT:             lev = MSGL_WARN;  break;
-    case VK_DEBUG_REPORT_INFORMATION_BIT_EXT:         lev = MSGL_TRACE; break;
-    case VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT: lev = MSGL_WARN;  break;
-    case VK_DEBUG_REPORT_DEBUG_BIT_EXT:               lev = MSGL_DEBUG; break;
-    };
-
-    MP_MSG(vk, lev, "vk [%s] %d: %s (obj 0x%llx (%s), loc 0x%zx)\n",
-           layer, (int)msgCode, msg, (unsigned long long)obj,
-           vk_dbg_type(objType), loc);
-
-    // The return value of this function determines whether the call will
-    // be explicitly aborted (to prevent GPU errors) or not. In this case,
-    // we generally want this to be on for the errors.
-    return (flags & VK_DEBUG_REPORT_ERROR_BIT_EXT);
-}
 
-static void vk_cmdpool_destroy(struct mpvk_ctx *vk, struct vk_cmdpool *pool);
-static struct vk_cmdpool *vk_cmdpool_create(struct mpvk_ctx *vk,
-                                            VkDeviceQueueCreateInfo qinfo,
-                                            VkQueueFamilyProperties props);
-
-void mpvk_uninit(struct mpvk_ctx *vk)
-{
-    if (!vk->inst)
-        return;
-
-    if (vk->dev) {
-        mpvk_flush_commands(vk);
-        mpvk_poll_commands(vk, UINT64_MAX);
-        assert(vk->num_cmds_queued == 0);
-        assert(vk->num_cmds_pending == 0);
-        talloc_free(vk->cmds_queued);
-        talloc_free(vk->cmds_pending);
-        for (int i = 0; i < vk->num_pools; i++)
-            vk_cmdpool_destroy(vk, vk->pools[i]);
-        talloc_free(vk->pools);
-        for (int i = 0; i < vk->num_signals; i++)
-            vk_signal_destroy(vk, &vk->signals[i]);
-        talloc_free(vk->signals);
-        vk_malloc_uninit(vk);
-        vkDestroyDevice(vk->dev, MPVK_ALLOCATOR);
-    }
-
-    if (vk->dbg) {
-        // Same deal as creating the debug callback, we need to load this
-        // first.
-        VK_LOAD_PFN(vkDestroyDebugReportCallbackEXT)
-        pfn_vkDestroyDebugReportCallbackEXT(vk->inst, vk->dbg, MPVK_ALLOCATOR);
-    }
-
-    vkDestroySurfaceKHR(vk->inst, vk->surf, MPVK_ALLOCATOR);
-    vkDestroyInstance(vk->inst, MPVK_ALLOCATOR);
-
-    *vk = (struct mpvk_ctx){0};
-}
-
-bool mpvk_instance_init(struct mpvk_ctx *vk, struct mp_log *log,
-                        const char *surf_ext_name, bool debug)
+bool mpvk_init(struct mpvk_ctx *vk, struct ra_ctx *ctx, const char *surface_ext)
 {
-    *vk = (struct mpvk_ctx) {
-        .log = log,
-    };
-
-    VkInstanceCreateInfo info = {
-        .sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
-    };
-
-    if (debug) {
-        // Enables the LunarG standard validation layer, which
-        // is a meta-layer that loads lots of other validators
-        static const char* layers[] = {
-            "VK_LAYER_LUNARG_standard_validation",
-        };
-
-        info.ppEnabledLayerNames = layers;
-        info.enabledLayerCount = MP_ARRAY_SIZE(layers);
-    }
-
-    // Enable whatever extensions were compiled in.
-    const char *extensions[] = {
-        VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME,
-        VK_KHR_SURFACE_EXTENSION_NAME,
-        surf_ext_name,
-
-        // Extra extensions only used for debugging. These are toggled by
-        // decreasing the enabledExtensionCount, so the number needs to be
-        // synchronized with the code below.
-        VK_EXT_DEBUG_REPORT_EXTENSION_NAME,
-    };
-
-    const int debugExtensionCount = 1;
-
-    info.ppEnabledExtensionNames = extensions;
-    info.enabledExtensionCount = MP_ARRAY_SIZE(extensions);
-
-    if (!debug)
-        info.enabledExtensionCount -= debugExtensionCount;
-
-    MP_VERBOSE(vk, "Creating instance with extensions:\n");
-    for (int i = 0; i < info.enabledExtensionCount; i++)
-        MP_VERBOSE(vk, "    %s\n", info.ppEnabledExtensionNames[i]);
-
-    VkResult res = vkCreateInstance(&info, MPVK_ALLOCATOR, &vk->inst);
-    if (res != VK_SUCCESS) {
-        MP_VERBOSE(vk, "Failed creating instance: %s\n", vk_err(res));
-        return false;
-    }
-
-    if (debug) {
-        // Set up a debug callback to catch validation messages
-        VkDebugReportCallbackCreateInfoEXT dinfo = {
-            .sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT,
-            .flags = VK_DEBUG_REPORT_INFORMATION_BIT_EXT |
-                     VK_DEBUG_REPORT_WARNING_BIT_EXT |
-                     VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT |
-                     VK_DEBUG_REPORT_ERROR_BIT_EXT |
-                     VK_DEBUG_REPORT_DEBUG_BIT_EXT,
-            .pfnCallback = vk_dbg_callback,
-            .pUserData = vk,
-        };
-
-        // Since this is not part of the core spec, we need to load it. This
-        // can't fail because we've already successfully created an instance
-        // with this extension enabled.
-        VK_LOAD_PFN(vkCreateDebugReportCallbackEXT)
-        pfn_vkCreateDebugReportCallbackEXT(vk->inst, &dinfo, MPVK_ALLOCATOR,
-                                           &vk->dbg);
-    }
-
-    return true;
-}
-
-#define MPVK_MAX_DEVICES 16
-
-static bool physd_supports_surface(struct mpvk_ctx *vk, VkPhysicalDevice physd)
-{
-    uint32_t qfnum;
-    vkGetPhysicalDeviceQueueFamilyProperties(physd, &qfnum, NULL);
-
-    for (int i = 0; i < qfnum; i++) {
-        VkBool32 sup;
-        VK(vkGetPhysicalDeviceSurfaceSupportKHR(physd, i, vk->surf, &sup));
-        if (sup)
-            return true;
-    }
-
-error:
-    return false;
-}
-
-bool mpvk_find_phys_device(struct mpvk_ctx *vk, const char *name, bool sw)
-{
-    assert(vk->surf);
-
-    MP_VERBOSE(vk, "Probing for vulkan devices:\n");
-
-    VkPhysicalDevice *devices = NULL;
-    uint32_t num = 0;
-    VK(vkEnumeratePhysicalDevices(vk->inst, &num, NULL));
-    devices = talloc_array(NULL, VkPhysicalDevice, num);
-    VK(vkEnumeratePhysicalDevices(vk->inst, &num, devices));
-
-    // Sorted by "priority". Reuses some m_opt code for convenience
-    static const struct m_opt_choice_alternatives types[] = {
-        {"discrete",   VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU},
-        {"integrated", VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU},
-        {"virtual",    VK_PHYSICAL_DEVICE_TYPE_VIRTUAL_GPU},
-        {"software",   VK_PHYSICAL_DEVICE_TYPE_CPU},
-        {"unknown",    VK_PHYSICAL_DEVICE_TYPE_OTHER},
-        {0}
-    };
-
-    VkPhysicalDeviceProperties props[MPVK_MAX_DEVICES];
-    for (int i = 0; i < num; i++) {
-        vkGetPhysicalDeviceProperties(devices[i], &props[i]);
-        MP_VERBOSE(vk, "    GPU %d: %s (%s)\n", i, props[i].deviceName,
-                   m_opt_choice_str(types, props[i].deviceType));
-    }
-
-    // Iterate through each type in order of decreasing preference
-    for (int t = 0; types[t].name; t++) {
-        // Disallow SW rendering unless explicitly enabled
-        if (types[t].value == VK_PHYSICAL_DEVICE_TYPE_CPU && !sw)
-            continue;
-
-        for (int i = 0; i < num; i++) {
-            VkPhysicalDeviceProperties prop = props[i];
-            if (prop.deviceType != types[t].value)
-                continue;
-            if (name && strcmp(name, prop.deviceName) != 0)
-                continue;
-            if (!physd_supports_surface(vk, devices[i]))
-                continue;
-
-            MP_VERBOSE(vk, "Chose device:\n");
-            MP_VERBOSE(vk, "    Device Name: %s\n", prop.deviceName);
-            MP_VERBOSE(vk, "    Device ID: %x:%x\n",
-                       (unsigned)prop.vendorID, (unsigned)prop.deviceID);
-            MP_VERBOSE(vk, "    Driver version: %d\n", (int)prop.driverVersion);
-            MP_VERBOSE(vk, "    API version: %d.%d.%d\n",
-                    (int)VK_VERSION_MAJOR(prop.apiVersion),
-                    (int)VK_VERSION_MINOR(prop.apiVersion),
-                    (int)VK_VERSION_PATCH(prop.apiVersion));
-            vk->physd = devices[i];
-            vk->limits = prop.limits;
-            vkGetPhysicalDeviceFeatures(vk->physd, &vk->features);
-            talloc_free(devices);
-            return true;
-        }
-    }
-
-error:
-    MP_VERBOSE(vk, "Found no suitable device, giving up.\n");
-    talloc_free(devices);
-    return false;
-}
-
-bool mpvk_get_phys_device_uuid(struct mpvk_ctx *vk, uint8_t uuid_out[VK_UUID_SIZE])
-{
-    assert(vk->physd);
-
-    VkPhysicalDeviceIDPropertiesKHR idprops = {
-        .sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES_KHR,
-    };
-
-    VkPhysicalDeviceProperties2KHR props = {
-        .sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2_KHR,
-        .pNext = &idprops,
-    };
-
-    VK_LOAD_PFN(vkGetPhysicalDeviceProperties2KHR);
-    pfn_vkGetPhysicalDeviceProperties2KHR(vk->physd, &props);
-
-    memcpy(uuid_out, idprops.deviceUUID, VK_UUID_SIZE);
-
-    return true;
-}
-
-bool mpvk_pick_surface_format(struct mpvk_ctx *vk)
-{
-    assert(vk->physd);
-
-    VkSurfaceFormatKHR *formats = NULL;
-    int num;
-
-    // Enumerate through the surface formats and find one that we can map to
-    // a ra_format
-    VK(vkGetPhysicalDeviceSurfaceFormatsKHR(vk->physd, vk->surf, &num, NULL));
-    formats = talloc_array(NULL, VkSurfaceFormatKHR, num);
-    VK(vkGetPhysicalDeviceSurfaceFormatsKHR(vk->physd, vk->surf, &num, formats));
-
-    for (int i = 0; i < num; i++) {
-        // A value of VK_FORMAT_UNDEFINED means we can pick anything we want
-        if (formats[i].format == VK_FORMAT_UNDEFINED) {
-            vk->surf_format = (VkSurfaceFormatKHR) {
-                .colorSpace = VK_COLOR_SPACE_SRGB_NONLINEAR_KHR,
-                .format = VK_FORMAT_R16G16B16A16_UNORM,
-            };
-            break;
-        }
-
-        if (formats[i].colorSpace != VK_COLOR_SPACE_SRGB_NONLINEAR_KHR)
-            continue;
-
-        // Format whitelist, since we want only >= 8 bit _UNORM formats
-        switch (formats[i].format) {
-        case VK_FORMAT_R8G8B8_UNORM:
-        case VK_FORMAT_B8G8R8_UNORM:
-        case VK_FORMAT_R8G8B8A8_UNORM:
-        case VK_FORMAT_B8G8R8A8_UNORM:
-        case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
-        case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
-        case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
-        case VK_FORMAT_R16G16B16_UNORM:
-        case VK_FORMAT_R16G16B16A16_UNORM:
-             break; // accept
-        default: continue;
-        }
-
-        vk->surf_format = formats[i];
-        break;
-    }
-
-    talloc_free(formats);
-
-    if (!vk->surf_format.format)
-        goto error;
-
-    return true;
-
-error:
-    MP_ERR(vk, "Failed picking surface format!\n");
-    talloc_free(formats);
-    return false;
-}
-
-// Find the most specialized queue supported a combination of flags. In cases
-// where there are multiple queue families at the same specialization level,
-// this finds the one with the most queues. Returns -1 if no queue was found.
-static int find_qf(VkQueueFamilyProperties *qfs, int qfnum, VkQueueFlags flags)
-{
-    int idx = -1;
-    for (int i = 0; i < qfnum; i++) {
-        if (!(qfs[i].queueFlags & flags))
-            continue;
-
-        // QF is more specialized. Since we don't care about other bits like
-        // SPARSE_BIT, mask the ones we're interestew in
-        const VkQueueFlags mask = VK_QUEUE_GRAPHICS_BIT |
-                                  VK_QUEUE_TRANSFER_BIT |
-                                  VK_QUEUE_COMPUTE_BIT;
-
-        if (idx < 0 || (qfs[i].queueFlags & mask) < (qfs[idx].queueFlags & mask))
-            idx = i;
-
-        // QF has more queues (at the same specialization level)
-        if (qfs[i].queueFlags == qfs[idx].queueFlags &&
-            qfs[i].queueCount > qfs[idx].queueCount)
-            idx = i;
-    }
-
-    return idx;
-}
-
-static void add_qinfo(void *tactx, VkDeviceQueueCreateInfo **qinfos,
-                      int *num_qinfos, VkQueueFamilyProperties *qfs, int idx,
-                      int qcount)
-{
-    if (idx < 0)
-        return;
-
-    // Check to see if we've already added this queue family
-    for (int i = 0; i < *num_qinfos; i++) {
-        if ((*qinfos)[i].queueFamilyIndex == idx)
-            return;
-    }
-
-    float *priorities = talloc_zero_array(tactx, float, qcount);
-    VkDeviceQueueCreateInfo qinfo = {
-        .sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO,
-        .queueFamilyIndex = idx,
-        .queueCount = MPMIN(qcount, qfs[idx].queueCount),
-        .pQueuePriorities = priorities,
-    };
-
-    MP_TARRAY_APPEND(tactx, *qinfos, *num_qinfos, qinfo);
-}
-
-static bool detect_device_extensions(struct mpvk_ctx *vk)
-{
-    bool ret = false;
-    VkExtensionProperties *props = NULL;
-
-    uint32_t num_exts;
-    VK(vkEnumerateDeviceExtensionProperties(vk->physd, NULL,
-                                            &num_exts, NULL));
-
-    props = talloc_array(NULL, VkExtensionProperties, num_exts);
-    VK(vkEnumerateDeviceExtensionProperties(vk->physd,
-                                            NULL, &num_exts, props));
-
-    for (uint32_t i = 0; i < num_exts; i++) {
-        if (!strcmp(VK_KHR_EXTERNAL_MEMORY_EXTENSION_NAME,
-                    props[i].extensionName)) {
-            vk->has_ext_external_memory = true;
-            continue;
-        }
-        if (!strcmp(MP_VK_EXTERNAL_MEMORY_EXPORT_EXTENSION_NAME,
-                    props[i].extensionName)) {
-            vk->has_ext_external_memory_export = true;
-            continue;
-        }
-    }
-
-    ret = true;
-error:
-    talloc_free(props);
-    return ret;
-}
-
-bool mpvk_device_init(struct mpvk_ctx *vk, struct mpvk_device_opts opts)
-{
-    assert(vk->physd);
-    void *tmp = talloc_new(NULL);
-
-    // Enumerate the queue families and find suitable families for each task
-    int qfnum;
-    vkGetPhysicalDeviceQueueFamilyProperties(vk->physd, &qfnum, NULL);
-    VkQueueFamilyProperties *qfs = talloc_array(tmp, VkQueueFamilyProperties, qfnum);
-    vkGetPhysicalDeviceQueueFamilyProperties(vk->physd, &qfnum, qfs);
-
-    MP_VERBOSE(vk, "Queue families supported by device:\n");
-
-    for (int i = 0; i < qfnum; i++) {
-        MP_VERBOSE(vk, "    QF %d: flags 0x%x num %d\n", i,
-                   (unsigned)qfs[i].queueFlags, (int)qfs[i].queueCount);
-    }
-
-    int idx_gfx = -1, idx_comp = -1, idx_tf = -1;
-    idx_gfx = find_qf(qfs, qfnum, VK_QUEUE_GRAPHICS_BIT);
-    if (opts.async_compute)
-        idx_comp = find_qf(qfs, qfnum, VK_QUEUE_COMPUTE_BIT);
-    if (opts.async_transfer)
-        idx_tf = find_qf(qfs, qfnum, VK_QUEUE_TRANSFER_BIT);
-
-    // Vulkan requires at least one GRAPHICS queue, so if this fails something
-    // is horribly wrong.
-    assert(idx_gfx >= 0);
-    MP_VERBOSE(vk, "Using graphics queue (QF %d)\n", idx_gfx);
-
-    // Ensure we can actually present to the surface using this queue
-    VkBool32 sup;
-    VK(vkGetPhysicalDeviceSurfaceSupportKHR(vk->physd, idx_gfx, vk->surf, &sup));
-    if (!sup) {
-        MP_ERR(vk, "Queue family does not support surface presentation!\n");
+    vk->ctx = pl_context_create(PL_API_VER, NULL);
+    if (!vk->ctx)
         goto error;
-    }
-
-    if (idx_tf >= 0 && idx_tf != idx_gfx)
-        MP_VERBOSE(vk, "Using async transfer (QF %d)\n", idx_tf);
-    if (idx_comp >= 0 && idx_comp != idx_gfx)
-        MP_VERBOSE(vk, "Using async compute (QF %d)\n", idx_comp);
 
-    // Fall back to supporting compute shaders via the graphics pool for
-    // devices which support compute shaders but not async compute.
-    if (idx_comp < 0 && qfs[idx_gfx].queueFlags & VK_QUEUE_COMPUTE_BIT)
-        idx_comp = idx_gfx;
+    vk->pl_log = mp_log_new(ctx, ctx->log, "libplacebo");
+    mppl_ctx_set_log(vk->ctx, vk->pl_log, true);
 
-    // Now that we know which QFs we want, we can create the logical device
-    VkDeviceQueueCreateInfo *qinfos = NULL;
-    int num_qinfos = 0;
-    add_qinfo(tmp, &qinfos, &num_qinfos, qfs, idx_gfx, opts.queue_count);
-    add_qinfo(tmp, &qinfos, &num_qinfos, qfs, idx_comp, opts.queue_count);
-    add_qinfo(tmp, &qinfos, &num_qinfos, qfs, idx_tf, opts.queue_count);
-
-    if (!detect_device_extensions(vk)) {
-        MP_WARN(vk, "Failed to enumerate device extensions. "
-                    "Some features may be disabled.\n");
-    }
-
-    const char **exts = NULL;
-    int num_exts = 0;
-    MP_TARRAY_APPEND(tmp, exts, num_exts, VK_KHR_SWAPCHAIN_EXTENSION_NAME);
-    if (vk->has_ext_external_memory)
-        MP_TARRAY_APPEND(tmp, exts, num_exts, VK_KHR_EXTERNAL_MEMORY_EXTENSION_NAME);
-    if (vk->has_ext_external_memory_export)
-        MP_TARRAY_APPEND(tmp, exts, num_exts, MP_VK_EXTERNAL_MEMORY_EXPORT_EXTENSION_NAME);
-    if (vk->spirv->required_ext)
-        MP_TARRAY_APPEND(tmp, exts, num_exts, vk->spirv->required_ext);
-
-    // Enable all features we optionally use
-#define FEATURE(name) .name = vk->features.name
-    VkPhysicalDeviceFeatures feats = {
-        FEATURE(shaderImageGatherExtended),
-        FEATURE(shaderStorageImageExtendedFormats),
-    };
-#undef FEATURE
-
-    VkDeviceCreateInfo dinfo = {
-        .sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
-        .pQueueCreateInfos = qinfos,
-        .queueCreateInfoCount = num_qinfos,
-        .ppEnabledExtensionNames = exts,
-        .enabledExtensionCount = num_exts,
-        .pEnabledFeatures = &feats,
-    };
-
-    MP_VERBOSE(vk, "Creating vulkan device with extensions:\n");
-    for (int i = 0; i < num_exts; i++)
-        MP_VERBOSE(vk, "    %s\n", exts[i]);
-
-    VK(vkCreateDevice(vk->physd, &dinfo, MPVK_ALLOCATOR, &vk->dev));
-
-    // Create the command pools and memory allocator
-    for (int i = 0; i < num_qinfos; i++) {
-        int qf = qinfos[i].queueFamilyIndex;
-        struct vk_cmdpool *pool = vk_cmdpool_create(vk, qinfos[i], qfs[qf]);
-        if (!pool)
-            goto error;
-        MP_TARRAY_APPEND(NULL, vk->pools, vk->num_pools, pool);
-
-        // Update the pool_* pointers based on the corresponding QF index
-        if (qf == idx_gfx)
-            vk->pool_graphics = pool;
-        if (qf == idx_comp)
-            vk->pool_compute = pool;
-        if (qf == idx_tf)
-            vk->pool_transfer = pool;
-    }
-
-    vk_malloc_init(vk);
-    talloc_free(tmp);
-    return true;
-
-error:
-    MP_ERR(vk, "Failed creating logical device!\n");
-    talloc_free(tmp);
-    return false;
-}
-
-// returns VK_SUCCESS (completed), VK_TIMEOUT (not yet completed) or an error
-static VkResult vk_cmd_poll(struct mpvk_ctx *vk, struct vk_cmd *cmd,
-                            uint64_t timeout)
-{
-    return vkWaitForFences(vk->dev, 1, &cmd->fence, false, timeout);
-}
-
-static void vk_cmd_reset(struct mpvk_ctx *vk, struct vk_cmd *cmd)
-{
-    for (int i = 0; i < cmd->num_callbacks; i++) {
-        struct vk_callback *cb = &cmd->callbacks[i];
-        cb->run(cb->priv, cb->arg);
-    }
-
-    cmd->num_callbacks = 0;
-    cmd->num_deps = 0;
-    cmd->num_sigs = 0;
-
-    // also make sure to reset vk->last_cmd in case this was the last command
-    if (vk->last_cmd == cmd)
-        vk->last_cmd = NULL;
-}
-
-static void vk_cmd_destroy(struct mpvk_ctx *vk, struct vk_cmd *cmd)
-{
-    if (!cmd)
-        return;
-
-    vk_cmd_poll(vk, cmd, UINT64_MAX);
-    vk_cmd_reset(vk, cmd);
-    vkDestroyFence(vk->dev, cmd->fence, MPVK_ALLOCATOR);
-    vkFreeCommandBuffers(vk->dev, cmd->pool->pool, 1, &cmd->buf);
-
-    talloc_free(cmd);
-}
-
-static struct vk_cmd *vk_cmd_create(struct mpvk_ctx *vk, struct vk_cmdpool *pool)
-{
-    struct vk_cmd *cmd = talloc_zero(NULL, struct vk_cmd);
-    cmd->pool = pool;
-
-    VkCommandBufferAllocateInfo ainfo = {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
-        .commandPool = pool->pool,
-        .level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
-        .commandBufferCount = 1,
-    };
-
-    VK(vkAllocateCommandBuffers(vk->dev, &ainfo, &cmd->buf));
-
-    VkFenceCreateInfo finfo = {
-        .sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO,
-        .flags = VK_FENCE_CREATE_SIGNALED_BIT,
+    const char *exts[] = {
+        VK_KHR_SURFACE_EXTENSION_NAME,
+        surface_ext,
     };
 
-    VK(vkCreateFence(vk->dev, &finfo, MPVK_ALLOCATOR, &cmd->fence));
-
-    return cmd;
-
-error:
-    vk_cmd_destroy(vk, cmd);
-    return NULL;
-}
-
-void vk_cmd_callback(struct vk_cmd *cmd, vk_cb callback, void *p, void *arg)
-{
-    MP_TARRAY_APPEND(cmd, cmd->callbacks, cmd->num_callbacks, (struct vk_callback) {
-        .run  = callback,
-        .priv = p,
-        .arg  = arg,
+    vk->vkinst = pl_vk_inst_create(vk->ctx, &(struct pl_vk_inst_params) {
+        .debug = ctx->opts.debug,
+        .extensions = exts,
+        .num_extensions = MP_ARRAY_SIZE(exts),
     });
-}
-
-void vk_cmd_dep(struct vk_cmd *cmd, VkSemaphore dep, VkPipelineStageFlags stage)
-{
-    int idx = cmd->num_deps++;
-    MP_TARRAY_GROW(cmd, cmd->deps, idx);
-    MP_TARRAY_GROW(cmd, cmd->depstages, idx);
-    cmd->deps[idx] = dep;
-    cmd->depstages[idx] = stage;
-}
-
-void vk_cmd_sig(struct vk_cmd *cmd, VkSemaphore sig)
-{
-    MP_TARRAY_APPEND(cmd, cmd->sigs, cmd->num_sigs, sig);
-}
-
-static void vk_cmdpool_destroy(struct mpvk_ctx *vk, struct vk_cmdpool *pool)
-{
-    if (!pool)
-        return;
 
-    for (int i = 0; i < pool->num_cmds; i++)
-        vk_cmd_destroy(vk, pool->cmds[i]);
-
-    vkDestroyCommandPool(vk->dev, pool->pool, MPVK_ALLOCATOR);
-    talloc_free(pool);
-}
-
-static struct vk_cmdpool *vk_cmdpool_create(struct mpvk_ctx *vk,
-                                            VkDeviceQueueCreateInfo qinfo,
-                                            VkQueueFamilyProperties props)
-{
-    struct vk_cmdpool *pool = talloc_ptrtype(NULL, pool);
-    *pool = (struct vk_cmdpool) {
-        .props = props,
-        .qf = qinfo.queueFamilyIndex,
-        .queues = talloc_array(pool, VkQueue, qinfo.queueCount),
-        .num_queues = qinfo.queueCount,
-    };
-
-    for (int n = 0; n < pool->num_queues; n++)
-        vkGetDeviceQueue(vk->dev, pool->qf, n, &pool->queues[n]);
-
-    VkCommandPoolCreateInfo cinfo = {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
-        .flags = VK_COMMAND_POOL_CREATE_TRANSIENT_BIT |
-                 VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
-        .queueFamilyIndex = pool->qf,
-    };
-
-    VK(vkCreateCommandPool(vk->dev, &cinfo, MPVK_ALLOCATOR, &pool->pool));
-
-    return pool;
-
-error:
-    vk_cmdpool_destroy(vk, pool);
-    return NULL;
-}
-
-void mpvk_poll_commands(struct mpvk_ctx *vk, uint64_t timeout)
-{
-    while (vk->num_cmds_pending > 0) {
-        struct vk_cmd *cmd = vk->cmds_pending[0];
-        struct vk_cmdpool *pool = cmd->pool;
-        VkResult res = vk_cmd_poll(vk, cmd, timeout);
-        if (res == VK_TIMEOUT)
-            break;
-        vk_cmd_reset(vk, cmd);
-        MP_TARRAY_REMOVE_AT(vk->cmds_pending, vk->num_cmds_pending, 0);
-        MP_TARRAY_APPEND(pool, pool->cmds, pool->num_cmds, cmd);
-    }
-}
-
-bool mpvk_flush_commands(struct mpvk_ctx *vk)
-{
-    bool ret = true;
-
-    for (int i = 0; i < vk->num_cmds_queued; i++) {
-        struct vk_cmd *cmd = vk->cmds_queued[i];
-        struct vk_cmdpool *pool = cmd->pool;
-
-        VkSubmitInfo sinfo = {
-            .sType = VK_STRUCTURE_TYPE_SUBMIT_INFO,
-            .commandBufferCount = 1,
-            .pCommandBuffers = &cmd->buf,
-            .waitSemaphoreCount = cmd->num_deps,
-            .pWaitSemaphores = cmd->deps,
-            .pWaitDstStageMask = cmd->depstages,
-            .signalSemaphoreCount = cmd->num_sigs,
-            .pSignalSemaphores = cmd->sigs,
-        };
-
-        VK(vkQueueSubmit(cmd->queue, 1, &sinfo, cmd->fence));
-        MP_TARRAY_APPEND(NULL, vk->cmds_pending, vk->num_cmds_pending, cmd);
-
-        if (mp_msg_test(vk->log, MSGL_TRACE)) {
-            MP_TRACE(vk, "Submitted command on queue %p (QF %d):\n",
-                     (void *)cmd->queue, pool->qf);
-            for (int n = 0; n < cmd->num_deps; n++)
-                MP_TRACE(vk, "    waits on semaphore %p\n", (void *)cmd->deps[n]);
-            for (int n = 0; n < cmd->num_sigs; n++)
-                MP_TRACE(vk, "    signals semaphore %p\n", (void *)cmd->sigs[n]);
-        }
-        continue;
-
-error:
-        vk_cmd_reset(vk, cmd);
-        MP_TARRAY_APPEND(pool, pool->cmds, pool->num_cmds, cmd);
-        ret = false;
-    }
-
-    vk->num_cmds_queued = 0;
-
-    return ret;
-}
-
-void vk_dev_callback(struct mpvk_ctx *vk, vk_cb callback, void *p, void *arg)
-{
-    if (vk->last_cmd) {
-        vk_cmd_callback(vk->last_cmd, callback, p, arg);
-    } else {
-        // The device was already idle, so we can just immediately call it
-        callback(p, arg);
-    }
-}
-
-struct vk_cmd *vk_cmd_begin(struct mpvk_ctx *vk, struct vk_cmdpool *pool)
-{
-    // garbage collect the cmdpool first, to increase the chances of getting
-    // an already-available command buffer
-    mpvk_poll_commands(vk, 0);
-
-    struct vk_cmd *cmd = NULL;
-    if (MP_TARRAY_POP(pool->cmds, pool->num_cmds, &cmd))
-        goto done;
-
-    // No free command buffers => allocate another one
-    cmd = vk_cmd_create(vk, pool);
-    if (!cmd)
+    if (!vk->vkinst)
         goto error;
 
-done: ;
-
-    VkCommandBufferBeginInfo binfo = {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
-        .flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT,
-    };
-
-    VK(vkBeginCommandBuffer(cmd->buf, &binfo));
-
-    cmd->queue = pool->queues[pool->idx_queues];
-    return cmd;
-
-error:
-    // Something has to be seriously messed up if we get to this point
-    vk_cmd_destroy(vk, cmd);
-    return NULL;
-}
-
-void vk_cmd_queue(struct mpvk_ctx *vk, struct vk_cmd *cmd)
-{
-    struct vk_cmdpool *pool = cmd->pool;
-
-    VK(vkEndCommandBuffer(cmd->buf));
-
-    VK(vkResetFences(vk->dev, 1, &cmd->fence));
-    MP_TARRAY_APPEND(NULL, vk->cmds_queued, vk->num_cmds_queued, cmd);
-    vk->last_cmd = cmd;
-    return;
-
-error:
-    vk_cmd_reset(vk, cmd);
-    MP_TARRAY_APPEND(pool, pool->cmds, pool->num_cmds, cmd);
-}
-
-void vk_signal_destroy(struct mpvk_ctx *vk, struct vk_signal **sig)
-{
-    if (!*sig)
-        return;
-
-    vkDestroySemaphore(vk->dev, (*sig)->semaphore, MPVK_ALLOCATOR);
-    vkDestroyEvent(vk->dev, (*sig)->event, MPVK_ALLOCATOR);
-    talloc_free(*sig);
-    *sig = NULL;
-}
-
-struct vk_signal *vk_cmd_signal(struct mpvk_ctx *vk, struct vk_cmd *cmd,
-                                VkPipelineStageFlags stage)
-{
-    struct vk_signal *sig = NULL;
-    if (MP_TARRAY_POP(vk->signals, vk->num_signals, &sig))
-        goto done;
-
-    // no available signal => initialize a new one
-    sig = talloc_zero(NULL, struct vk_signal);
-    static const VkSemaphoreCreateInfo sinfo = {
-        .sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO,
-    };
-
-    VK(vkCreateSemaphore(vk->dev, &sinfo, MPVK_ALLOCATOR, &sig->semaphore));
-
-    static const VkEventCreateInfo einfo = {
-        .sType = VK_STRUCTURE_TYPE_EVENT_CREATE_INFO,
-    };
-
-    VK(vkCreateEvent(vk->dev, &einfo, MPVK_ALLOCATOR, &sig->event));
-
-done:
-    // Signal both the semaphore and the event if possible. (We will only
-    // end up using one or the other)
-    vk_cmd_sig(cmd, sig->semaphore);
-
-    VkQueueFlags req = VK_QUEUE_GRAPHICS_BIT | VK_QUEUE_COMPUTE_BIT;
-    if (cmd->pool->props.queueFlags & req) {
-        vkCmdSetEvent(cmd->buf, sig->event, stage);
-        sig->event_source = cmd->queue;
-    }
-
-    return sig;
+    mppl_ctx_set_log(vk->ctx, vk->pl_log, false); // disable probing
+    return true;
 
 error:
-    vk_signal_destroy(vk, &sig);
-    return NULL;
-}
-
-static bool unsignal_cmd(struct vk_cmd *cmd, VkSemaphore sem)
-{
-    for (int n = 0; n < cmd->num_sigs; n++) {
-        if (cmd->sigs[n] == sem) {
-            MP_TARRAY_REMOVE_AT(cmd->sigs, cmd->num_sigs, n);
-            return true;
-        }
-    }
-
+    mpvk_uninit(vk);
     return false;
 }
 
-// Attempts to remove a queued signal operation. Returns true if sucessful,
-// i.e. the signal could be removed before it ever got fired.
-static bool unsignal(struct mpvk_ctx *vk, struct vk_cmd *cmd, VkSemaphore sem)
-{
-    if (unsignal_cmd(cmd, sem))
-        return true;
-
-    // Attempt to remove it from any queued commands
-    for (int i = 0; i < vk->num_cmds_queued; i++) {
-        if (unsignal_cmd(vk->cmds_queued[i], sem))
-            return true;
-    }
-
-    return false;
-}
-
-static void release_signal(struct mpvk_ctx