fftools/ffplay: add hwaccel decoding support

Add vulkan renderer via libplacebo.

Simple usage:
$ ffplay -hwaccel vulkan foo.mp4

Use cuda to vulkan map:
$ ffplay -hwaccel cuda foo.mp4

Create vulkan instance by libplacebo, and enable debug:
$ ffplay -hwaccel vulkan \
	-vulkan_params create_by_placebo=1:debug=1 foo.mp4

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

configure

@@ -3904,7 +3904,7 @@ ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
 ffmpeg_suggest="ole32 psapi shell32"
 ffplay_deps="avcodec avformat avfilter swscale swresample sdl2"
 ffplay_select="crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
-ffplay_suggest="shell32"
+ffplay_suggest="shell32 libplacebo vulkan"
 ffprobe_deps="avcodec avformat"
 ffprobe_suggest="shell32"
 

doc/ffplay.texi

@@ -196,6 +196,18 @@ will produce a thread pool with this many threads available for parallel
 processing. The default is 0 which means that the thread count will be
 determined by the number of available CPUs.
 
+@item -enable_vulkan
+Use vulkan renderer rather than SDL builtin renderer. Depends on libplacebo.
+
+@item -vulkan_params
+
+Vulkan configuration using a list of @var{key}=@var{value} pairs separated by
+":".
+
+@item -hwaccel
+Use HW accelerated decoding. Enable this option will enable vulkan renderer
+automatically.
+
 @end table
 
 @section While playing

fftools/Makefile

@@ -22,6 +22,8 @@ OBJS-ffmpeg +=                  \
     fftools/sync_queue.o        \
     fftools/thread_queue.o      \
 
+OBJS-ffplay += fftools/ffplay_renderer.o
+
 define DOFFTOOL
 OBJS-$(1) += fftools/cmdutils.o fftools/opt_common.o fftools/$(1).o $(OBJS-$(1)-yes)
 ifdef HAVE_GNU_WINDRES

fftools/ffplay.c

@@ -58,6 +58,7 @@
 #include <SDL_thread.h>
 
 #include "cmdutils.h"
+#include "ffplay_renderer.h"
 #include "opt_common.h"
 
 const char program_name[] = "ffplay";
@@ -350,6 +351,9 @@ static char *afilters = NULL;
 static int autorotate = 1;
 static int find_stream_info = 1;
 static int filter_nbthreads = 0;
+static int enable_vulkan = 0;
+static char *vulkan_params = NULL;
+static const char *hwaccel = NULL;
 
 /* current context */
 static int is_full_screen;
@@ -362,6 +366,8 @@ static SDL_Renderer *renderer;
 static SDL_RendererInfo renderer_info = {0};
 static SDL_AudioDeviceID audio_dev;
 
+static VkRenderer *vk_renderer;
+
 static const struct TextureFormatEntry {
     enum AVPixelFormat format;
     int texture_fmt;
@@ -954,6 +960,11 @@ static void video_image_display(VideoState *is)
     SDL_Rect rect;
 
     vp = frame_queue_peek_last(&is->pictq);
+    if (vk_renderer) {
+        vk_renderer_display(vk_renderer, vp->frame);
+        return;
+    }
+
     if (is->subtitle_st) {
         if (frame_queue_nb_remaining(&is->subpq) > 0) {
             sp = frame_queue_peek(&is->subpq);
@@ -1289,6 +1300,8 @@ static void do_exit(VideoState *is)
     }
     if (renderer)
         SDL_DestroyRenderer(renderer);
+    if (vk_renderer)
+        vk_renderer_destroy(vk_renderer);
     if (window)
         SDL_DestroyWindow(window);
     uninit_opts();
@@ -2546,6 +2559,37 @@ static int audio_open(void *opaque, AVChannelLayout *wanted_channel_layout, int
     return spec.size;
 }
 
+static int create_hwaccel(AVBufferRef **device_ctx)
+{
+    enum AVHWDeviceType type;
+    int ret;
+    AVBufferRef *vk_dev;
+
+    *device_ctx = NULL;
+
+    if (!hwaccel)
+        return 0;
+
+    type = av_hwdevice_find_type_by_name(hwaccel);
+    if (type == AV_HWDEVICE_TYPE_NONE)
+        return AVERROR(ENOTSUP);
+
+    ret = vk_renderer_get_hw_dev(vk_renderer, &vk_dev);
+    if (ret < 0)
+        return ret;
+
+    ret = av_hwdevice_ctx_create_derived(device_ctx, type, vk_dev, 0);
+    if (!ret)
+        return 0;
+
+    if (ret != AVERROR(ENOSYS))
+        return ret;
+
+    av_log(NULL, AV_LOG_WARNING, "Derive %s from vulkan not supported.\n", hwaccel);
+    ret = av_hwdevice_ctx_create(device_ctx, type, NULL, NULL, 0);
+    return ret;
+}
+
 /* open a given stream. Return 0 if OK */
 static int stream_component_open(VideoState *is, int stream_index)
 {
@@ -2613,6 +2657,12 @@ static int stream_component_open(VideoState *is, int stream_index)
 
     av_dict_set(&opts, "flags", "+copy_opaque", AV_DICT_MULTIKEY);
 
+    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+        ret = create_hwaccel(&avctx->hw_device_ctx);
+        if (ret < 0)
+            goto fail;
+    }
+
     if ((ret = avcodec_open2(avctx, codec, &opts)) < 0) {
         goto fail;
     }
@@ -3447,6 +3497,8 @@ static void event_loop(VideoState *cur_stream)
                         SDL_DestroyTexture(cur_stream->vis_texture);
                         cur_stream->vis_texture = NULL;
                     }
+                    if (vk_renderer)
+                        vk_renderer_resize(vk_renderer, screen_width, screen_height);
                 case SDL_WINDOWEVENT_EXPOSED:
                     cur_stream->force_refresh = 1;
             }
@@ -3611,6 +3663,9 @@ static const OptionDef options[] = {
     { "find_stream_info", OPT_BOOL | OPT_INPUT | OPT_EXPERT, { &find_stream_info },
         "read and decode the streams to fill missing information with heuristics" },
     { "filter_threads", HAS_ARG | OPT_INT | OPT_EXPERT, { &filter_nbthreads }, "number of filter threads per graph" },
+    { "enable_vulkan", OPT_BOOL, { &enable_vulkan }, "enable vulkan renderer" },
+    { "vulkan_params", HAS_ARG | OPT_STRING | OPT_EXPERT, { &vulkan_params }, "vulkan configuration using a list of key=value pairs separated by ':'" },
+    { "hwaccel", HAS_ARG | OPT_STRING | OPT_EXPERT, { &hwaccel }, "use HW accelerated decoding" },
     { NULL, },
 };
 
@@ -3725,9 +3780,40 @@ int main(int argc, char **argv)
 #ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR
         SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 #endif
+        if (hwaccel && !enable_vulkan) {
+            av_log(NULL, AV_LOG_INFO, "Enable vulkan renderer to support hwaccel %s\n", hwaccel);
+            enable_vulkan = 1;
+        }
+        if (enable_vulkan) {
+            vk_renderer = vk_get_renderer();
+            if (vk_renderer) {
+#if SDL_VERSION_ATLEAST(2, 0, 6)
+                flags |= SDL_WINDOW_VULKAN;
+#endif
+            } else {
+                av_log(NULL, AV_LOG_WARNING, "Doesn't support vulkan renderer, fallback to SDL renderer\n");
+                enable_vulkan = 0;
+            }
+        }
         window = SDL_CreateWindow(program_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, default_width, default_height, flags);
         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
-        if (window) {
+        if (!window) {
+            av_log(NULL, AV_LOG_FATAL, "Failed to create window: %s", SDL_GetError());
+            do_exit(NULL);
+        }
+
+        if (vk_renderer) {
+            AVDictionary *dict = NULL;
+
+            if (vulkan_params)
+                av_dict_parse_string(&dict, vulkan_params, "=", ":", 0);
+            ret = vk_renderer_create(vk_renderer, window, dict);
+            av_dict_free(&dict);
+            if (ret < 0) {
+                av_log(NULL, AV_LOG_FATAL, "Failed to create vulkan renderer, %s\n", av_err2str(ret));
+                do_exit(NULL);
+            }
+        } else {
             renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
             if (!renderer) {
                 av_log(NULL, AV_LOG_WARNING, "Failed to initialize a hardware accelerated renderer: %s\n", SDL_GetError());
@@ -3737,10 +3823,10 @@ int main(int argc, char **argv)
                 if (!SDL_GetRendererInfo(renderer, &renderer_info))
                     av_log(NULL, AV_LOG_VERBOSE, "Initialized %s renderer.\n", renderer_info.name);
             }
-        }
-        if (!window || !renderer || !renderer_info.num_texture_formats) {
-            av_log(NULL, AV_LOG_FATAL, "Failed to create window or renderer: %s", SDL_GetError());
-            do_exit(NULL);
+            if (!renderer || !renderer_info.num_texture_formats) {
+                av_log(NULL, AV_LOG_FATAL, "Failed to create window or renderer: %s", SDL_GetError());
+                do_exit(NULL);
+            }
         }
     }
 

fftools/ffplay_renderer.c

@@ -0,0 +1,824 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#define VK_NO_PROTOTYPES
+#define VK_ENABLE_BETA_EXTENSIONS
+
+#include "config.h"
+#include "ffplay_renderer.h"
+
+#if (SDL_VERSION_ATLEAST(2, 0, 6) && CONFIG_LIBPLACEBO)
+/* Get PL_API_VER */
+#include <libplacebo/config.h>
+#define HAVE_VULKAN_RENDERER (PL_API_VER >= 278)
+#else
+#define HAVE_VULKAN_RENDERER 0
+#endif
+
+#if HAVE_VULKAN_RENDERER
+
+#if defined(_WIN32) && !defined(VK_USE_PLATFORM_WIN32_KHR)
+#define VK_USE_PLATFORM_WIN32_KHR
+#endif
+
+#include <libplacebo/vulkan.h>
+#include <libplacebo/utils/frame_queue.h>
+#include <libplacebo/utils/libav.h>
+#include <SDL_vulkan.h>
+
+#include "libavutil/bprint.h"
+
+#endif
+
+struct VkRenderer {
+    const AVClass *class;
+
+    int (*create)(VkRenderer *renderer, SDL_Window *window, AVDictionary *dict);
+
+    int (*get_hw_dev)(VkRenderer *renderer, AVBufferRef **dev);
+
+    int (*display)(VkRenderer *renderer, AVFrame *frame);
+
+    int (*resize)(VkRenderer *renderer, int width, int height);
+
+    void (*destroy)(VkRenderer *renderer);
+};
+
+#if HAVE_VULKAN_RENDERER
+
+typedef struct RendererContext {
+    VkRenderer api;
+
+    // Can be NULL when vulkan instance is created by avutil
+    pl_vk_inst placebo_instance;
+    pl_vulkan placebo_vulkan;
+    pl_swapchain swapchain;
+    VkSurfaceKHR vk_surface;
+    pl_renderer renderer;
+    pl_tex tex[4];
+
+    pl_log vk_log;
+
+    AVBufferRef *hw_device_ref;
+    AVBufferRef *hw_frame_ref;
+    enum AVPixelFormat *transfer_formats;
+    AVHWFramesConstraints *constraints;
+
+    PFN_vkGetInstanceProcAddr get_proc_addr;
+    // This field is a copy from pl_vk_inst->instance or hw_device_ref instance.
+    VkInstance inst;
+
+    AVFrame *vk_frame;
+} RendererContext;
+
+static void vk_log_cb(void *log_priv, enum pl_log_level level,
+                      const char *msg)
+{
+    static const int level_map[] = {
+            AV_LOG_QUIET,
+            AV_LOG_FATAL,
+            AV_LOG_ERROR,
+            AV_LOG_WARNING,
+            AV_LOG_INFO,
+            AV_LOG_DEBUG,
+            AV_LOG_TRACE,
+    };
+
+    if (level > 0 && level < FF_ARRAY_ELEMS(level_map))
+        av_log(log_priv, level_map[level], "%s\n", msg);
+}
+
+// Should keep sync with optional_device_exts inside hwcontext_vulkan.c
+static const char *optional_device_exts[] = {
+    /* Misc or required by other extensions */
+    VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME,
+    VK_KHR_PUSH_DESCRIPTOR_EXTENSION_NAME,
+    VK_KHR_SAMPLER_YCBCR_CONVERSION_EXTENSION_NAME,
+    VK_EXT_DESCRIPTOR_BUFFER_EXTENSION_NAME,
+    VK_EXT_PHYSICAL_DEVICE_DRM_EXTENSION_NAME,
+    VK_EXT_SHADER_ATOMIC_FLOAT_EXTENSION_NAME,
+    VK_KHR_COOPERATIVE_MATRIX_EXTENSION_NAME,
+
+    /* Imports/exports */
+    VK_KHR_EXTERNAL_MEMORY_FD_EXTENSION_NAME,
+    VK_EXT_EXTERNAL_MEMORY_DMA_BUF_EXTENSION_NAME,
+    VK_EXT_IMAGE_DRM_FORMAT_MODIFIER_EXTENSION_NAME,
+    VK_KHR_EXTERNAL_SEMAPHORE_FD_EXTENSION_NAME,
+    VK_EXT_EXTERNAL_MEMORY_HOST_EXTENSION_NAME,
+#ifdef _WIN32
+    VK_KHR_EXTERNAL_MEMORY_WIN32_EXTENSION_NAME,
+    VK_KHR_EXTERNAL_SEMAPHORE_WIN32_EXTENSION_NAME,
+#endif
+
+    /* Video encoding/decoding */
+    VK_KHR_VIDEO_QUEUE_EXTENSION_NAME,
+    VK_KHR_VIDEO_DECODE_QUEUE_EXTENSION_NAME,
+    VK_KHR_VIDEO_DECODE_H264_EXTENSION_NAME,
+    VK_KHR_VIDEO_DECODE_H265_EXTENSION_NAME,
+    "VK_MESA_video_decode_av1",
+};
+
+static inline int enable_debug(AVDictionary *opt)
+{
+    AVDictionaryEntry *entry = av_dict_get(opt, "debug", NULL, 0);
+    int debug = entry && strtol(entry->value, NULL, 10);
+    return debug;
+}
+
+static void hwctx_lock_queue(void *priv, uint32_t qf, uint32_t qidx)
+{
+    AVHWDeviceContext *avhwctx = priv;
+    const AVVulkanDeviceContext *hwctx = avhwctx->hwctx;
+    hwctx->lock_queue(avhwctx, qf, qidx);
+}
+
+static void hwctx_unlock_queue(void *priv, uint32_t qf, uint32_t qidx)
+{
+    AVHWDeviceContext *avhwctx = priv;
+    const AVVulkanDeviceContext *hwctx = avhwctx->hwctx;
+    hwctx->unlock_queue(avhwctx, qf, qidx);
+}
+
+static int add_instance_extension(const char **ext, unsigned num_ext,
+                                  const AVDictionary *opt,
+                                  AVDictionary **dict)
+{
+    const char *inst_ext_key = "instance_extensions";
+    AVDictionaryEntry *entry;
+    AVBPrint buf;
+    char *ext_list = NULL;
+    int ret;
+
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_AUTOMATIC);
+    for (int i = 0; i < num_ext; i++) {
+        if (i)
+            av_bprintf(&buf, "+%s", ext[i]);
+        else
+            av_bprintf(&buf, "%s", ext[i]);
+    }
+
+    entry = av_dict_get(opt, inst_ext_key, NULL, 0);
+    if (entry && entry->value && entry->value[0]) {
+        if (num_ext)
+            av_bprintf(&buf, "+");
+        av_bprintf(&buf, "%s", entry->value);
+    }
+
+    ret = av_bprint_finalize(&buf, &ext_list);
+    if (ret < 0)
+        return ret;
+    return av_dict_set(dict, inst_ext_key, ext_list, AV_DICT_DONT_STRDUP_VAL);
+}
+
+static int add_device_extension(const AVDictionary *opt,
+                                AVDictionary **dict)
+{
+    const char *dev_ext_key = "device_extensions";
+    AVDictionaryEntry *entry;
+    AVBPrint buf;
+    char *ext_list = NULL;
+    int ret;
+
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_AUTOMATIC);
+    av_bprintf(&buf, "%s", VK_KHR_SWAPCHAIN_EXTENSION_NAME);
+    for (int i = 0; i < pl_vulkan_num_recommended_extensions; i++)
+        av_bprintf(&buf, "+%s", pl_vulkan_recommended_extensions[i]);
+
+    entry = av_dict_get(opt, dev_ext_key, NULL, 0);
+    if (entry && entry->value && entry->value[0])
+        av_bprintf(&buf, "+%s", entry->value);
+
+    ret = av_bprint_finalize(&buf, &ext_list);
+    if (ret < 0)
+        return ret;
+    return av_dict_set(dict, dev_ext_key, ext_list, AV_DICT_DONT_STRDUP_VAL);
+}
+
+static int create_vk_by_hwcontext(VkRenderer *renderer,
+                                  const char **ext, unsigned num_ext,
+                                  const AVDictionary *opt)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    AVHWDeviceContext *dev;
+    AVVulkanDeviceContext *hwctx;
+    AVDictionary *dict = NULL;
+    int ret;
+
+    ret = add_instance_extension(ext, num_ext, opt, &dict);
+    if (ret < 0)
+        return ret;
+    ret = add_device_extension(opt, &dict);
+    if (ret) {
+        av_dict_free(&dict);
+        return ret;
+    }
+
+    ret = av_hwdevice_ctx_create(&ctx->hw_device_ref, AV_HWDEVICE_TYPE_VULKAN,
+                           NULL, dict, 0);
+    av_dict_free(&dict);
+    if (ret < 0)
+        return ret;
+
+    dev = (AVHWDeviceContext *) ctx->hw_device_ref->data;
+    hwctx = dev->hwctx;
+
+    // There is no way to pass SDL GetInstanceProcAddr to hwdevice.
+    // Check the result and return error if they don't match.
+    if (hwctx->get_proc_addr != SDL_Vulkan_GetVkGetInstanceProcAddr()) {
+        av_log(renderer, AV_LOG_ERROR,
+               "hwdevice and SDL use different get_proc_addr. "
+               "Try -vulkan_params create_by_placebo=1\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
+    ctx->get_proc_addr = hwctx->get_proc_addr;
+    ctx->inst = hwctx->inst;
+    ctx->placebo_vulkan = pl_vulkan_import(ctx->vk_log,
+        pl_vulkan_import_params(
+            .instance = hwctx->inst,
+            .get_proc_addr = hwctx->get_proc_addr,
+            .phys_device = hwctx->phys_dev,
+            .device         = hwctx->act_dev,
+            .extensions     = hwctx->enabled_dev_extensions,
+            .num_extensions = hwctx->nb_enabled_dev_extensions,
+            .features       = &hwctx->device_features,
+            .lock_queue     = hwctx_lock_queue,
+            .unlock_queue   = hwctx_unlock_queue,
+            .queue_ctx      = dev,
+            .queue_graphics = {
+                .index = hwctx->queue_family_index,
+                .count = hwctx->nb_graphics_queues,
+            },
+            .queue_compute = {
+                .index = hwctx->queue_family_comp_index,
+                .count = hwctx->nb_comp_queues,
+            },
+            .queue_transfer = {
+                .index = hwctx->queue_family_tx_index,
+                .count = hwctx->nb_tx_queues,
+            },
+        ));
+    if (!ctx->placebo_vulkan)
+        return AVERROR_EXTERNAL;
+
+    return 0;
+}
+
+static void placebo_lock_queue(struct AVHWDeviceContext *dev_ctx,
+                       uint32_t queue_family, uint32_t index)
+{
+    RendererContext *ctx = dev_ctx->user_opaque;
+    pl_vulkan vk = ctx->placebo_vulkan;
+    vk->lock_queue(vk, queue_family, index);
+}
+
+static void placebo_unlock_queue(struct AVHWDeviceContext *dev_ctx,
+                         uint32_t queue_family,
+                         uint32_t index)
+{
+    RendererContext *ctx = dev_ctx->user_opaque;
+    pl_vulkan vk = ctx->placebo_vulkan;
+    vk->unlock_queue(vk, queue_family, index);
+}
+
+static int get_decode_queue(VkRenderer *renderer, int *index, int *count)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    VkQueueFamilyProperties *queue_family_prop = NULL;
+    uint32_t num_queue_family_prop = 0;
+    PFN_vkGetPhysicalDeviceQueueFamilyProperties get_queue_family_prop;
+    PFN_vkGetInstanceProcAddr get_proc_addr = ctx->get_proc_addr;
+
+    *index = -1;
+    *count = 0;
+    get_queue_family_prop = (PFN_vkGetPhysicalDeviceQueueFamilyProperties)
+            get_proc_addr(ctx->placebo_instance->instance,
+                          "vkGetPhysicalDeviceQueueFamilyProperties");
+    get_queue_family_prop(ctx->placebo_vulkan->phys_device,
+                          &num_queue_family_prop, NULL);
+    if (!num_queue_family_prop)
+        return AVERROR_EXTERNAL;
+
+    queue_family_prop = av_calloc(num_queue_family_prop,
+                                  sizeof(*queue_family_prop));
+    if (!queue_family_prop)
+        return AVERROR(ENOMEM);
+
+    get_queue_family_prop(ctx->placebo_vulkan->phys_device,
+                          &num_queue_family_prop,
+                          queue_family_prop);
+
+    for (int i = 0; i < num_queue_family_prop; i++) {
+        if (queue_family_prop[i].queueFlags & VK_QUEUE_VIDEO_DECODE_BIT_KHR) {
+            *index = i;
+            *count = queue_family_prop[i].queueCount;
+            break;
+        }
+    }
+    av_free(queue_family_prop);
+
+    return 0;
+}
+
+static int create_vk_by_placebo(VkRenderer *renderer,
+                                const char **ext, unsigned num_ext,
+                                const AVDictionary *opt)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    AVHWDeviceContext *device_ctx;
+    AVVulkanDeviceContext *vk_dev_ctx;
+    int decode_index;
+    int decode_count;
+    int ret;
+
+    ctx->get_proc_addr = SDL_Vulkan_GetVkGetInstanceProcAddr();
+
+    ctx->placebo_instance = pl_vk_inst_create(ctx->vk_log, pl_vk_inst_params(
+            .get_proc_addr = ctx->get_proc_addr,
+            .debug = enable_debug(opt),
+            .extensions = ext,
+            .num_extensions = num_ext
+    ));
+    if (!ctx->placebo_instance) {
+        return AVERROR_EXTERNAL;
+    }
+    ctx->inst = ctx->placebo_instance->instance;
+
+    ctx->placebo_vulkan = pl_vulkan_create(ctx->vk_log, pl_vulkan_params(
+            .instance = ctx->placebo_instance->instance,
+            .get_proc_addr = ctx->placebo_instance->get_proc_addr,
+            .surface = ctx->vk_surface,
+            .allow_software = false,
+            .opt_extensions = optional_device_exts,
+            .num_opt_extensions = FF_ARRAY_ELEMS(optional_device_exts),
+            .extra_queues = VK_QUEUE_VIDEO_DECODE_BIT_KHR,
+    ));
+    if (!ctx->placebo_vulkan)
+        return AVERROR_EXTERNAL;
+    ctx->hw_device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_VULKAN);
+    if (!ctx->hw_device_ref) {
+        return AVERROR(ENOMEM);
+    }
+
+    device_ctx = (AVHWDeviceContext *) ctx->hw_device_ref->data;
+    device_ctx->user_opaque = ctx;
+
+    vk_dev_ctx = device_ctx->hwctx;
+    vk_dev_ctx->lock_queue = placebo_lock_queue,
+            vk_dev_ctx->unlock_queue = placebo_unlock_queue;
+
+    vk_dev_ctx->get_proc_addr = ctx->placebo_instance->get_proc_addr;
+
+    vk_dev_ctx->inst = ctx->placebo_instance->instance;
+    vk_dev_ctx->phys_dev = ctx->placebo_vulkan->phys_device;
+    vk_dev_ctx->act_dev = ctx->placebo_vulkan->device;
+
+    vk_dev_ctx->device_features = *ctx->placebo_vulkan->features;
+
+    vk_dev_ctx->enabled_inst_extensions = ctx->placebo_instance->extensions;
+    vk_dev_ctx->nb_enabled_inst_extensions = ctx->placebo_instance->num_extensions;
+
+    vk_dev_ctx->enabled_dev_extensions = ctx->placebo_vulkan->extensions;
+    vk_dev_ctx->nb_enabled_dev_extensions = ctx->placebo_vulkan->num_extensions;
+
+    vk_dev_ctx->queue_family_index = ctx->placebo_vulkan->queue_graphics.index;
+    vk_dev_ctx->nb_graphics_queues = ctx->placebo_vulkan->queue_graphics.count;
+
+    vk_dev_ctx->queue_family_tx_index = ctx->placebo_vulkan->queue_transfer.index;
+    vk_dev_ctx->nb_tx_queues = ctx->placebo_vulkan->queue_transfer.count;
+
+    vk_dev_ctx->queue_family_comp_index = ctx->placebo_vulkan->queue_compute.index;
+    vk_dev_ctx->nb_comp_queues = ctx->placebo_vulkan->queue_compute.count;
+
+    ret = get_decode_queue(renderer, &decode_index, &decode_count);
+    if (ret < 0)
+        return ret;
+
+    vk_dev_ctx->queue_family_decode_index = decode_index;
+    vk_dev_ctx->nb_decode_queues = decode_count;
+
+    ret = av_hwdevice_ctx_init(ctx->hw_device_ref);
+    if (ret < 0)
+        return ret;
+
+    return 0;
+}
+
+static int create(VkRenderer *renderer, SDL_Window *window, AVDictionary *opt)
+{
+    int ret = 0;
+    unsigned num_ext = 0;
+    const char **ext = NULL;
+    int w, h;
+    struct pl_log_params vk_log_params = {
+            .log_cb = vk_log_cb,
+            .log_level = PL_LOG_DEBUG,
+            .log_priv = renderer,
+    };
+    RendererContext *ctx = (RendererContext *) renderer;
+    AVDictionaryEntry *entry;
+
+    ctx->vk_log = pl_log_create(PL_API_VER, &vk_log_params);
+
+    if (!SDL_Vulkan_GetInstanceExtensions(window, &num_ext, NULL)) {
+        av_log(NULL, AV_LOG_FATAL, "Failed to get vulkan extensions: %s\n",
+               SDL_GetError());
+        return AVERROR_EXTERNAL;
+    }
+
+    ext = av_calloc(num_ext, sizeof(*ext));
+    if (!ext) {
+        ret = AVERROR(ENOMEM);
+        goto out;
+    }
+
+    SDL_Vulkan_GetInstanceExtensions(window, &num_ext, ext);
+
+    entry = av_dict_get(opt, "create_by_placebo", NULL, 0);
+    if (entry && strtol(entry->value, NULL, 10))
+        ret = create_vk_by_placebo(renderer, ext, num_ext, opt);
+    else
+        ret = create_vk_by_hwcontext(renderer, ext, num_ext, opt);
+    if (ret < 0)
+        goto out;
+
+    if (!SDL_Vulkan_CreateSurface(window, ctx->inst, &ctx->vk_surface)) {
+        ret = AVERROR_EXTERNAL;
+        goto out;
+    }
+
+    ctx->swapchain = pl_vulkan_create_swapchain(
+            ctx->placebo_vulkan,
+            pl_vulkan_swapchain_params(
+                    .surface = ctx->vk_surface,
+                    .present_mode = VK_PRESENT_MODE_FIFO_KHR));
+    if (!ctx->swapchain) {
+        ret = AVERROR_EXTERNAL;
+        goto out;
+    }
+
+    SDL_Vulkan_GetDrawableSize(window, &w, &h);
+    pl_swapchain_resize(ctx->swapchain, &w, &h);
+
+    ctx->renderer = pl_renderer_create(ctx->vk_log, ctx->placebo_vulkan->gpu);
+    if (!ctx->renderer) {
+        ret = AVERROR_EXTERNAL;
+        goto out;
+    }
+
+    ctx->vk_frame = av_frame_alloc();
+    if (!ctx->vk_frame) {
+        ret = AVERROR(ENOMEM);
+        goto out;
+    }
+
+    ret = 0;
+
+out:
+    av_free(ext);
+    return ret;
+}
+
+static int get_hw_dev(VkRenderer *renderer, AVBufferRef **dev)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+
+    *dev = ctx->hw_device_ref;
+    return 0;
+}
+
+static int create_hw_frame(VkRenderer *renderer, AVFrame *frame)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    AVHWFramesContext *src_hw_frame = (AVHWFramesContext *)
+            frame->hw_frames_ctx->data;
+    AVHWFramesContext *hw_frame;
+    AVVulkanFramesContext *vk_frame_ctx;
+    int ret;
+
+    if (ctx->hw_frame_ref) {
+        hw_frame = (AVHWFramesContext *) ctx->hw_frame_ref->data;
+
+        if (hw_frame->width == frame->width &&
+            hw_frame->height == frame->height &&
+            hw_frame->sw_format == src_hw_frame->sw_format)
+            return 0;
+
+        av_buffer_unref(&ctx->hw_frame_ref);
+    }
+
+    if (!ctx->constraints) {
+        ctx->constraints = av_hwdevice_get_hwframe_constraints(
+                ctx->hw_device_ref, NULL);
+        if (!ctx->constraints)
+            return AVERROR(ENOMEM);
+    }
+
+    // Check constraints and skip create hwframe. Don't take it as error since
+    // we can fallback to memory copy from GPU to CPU.
+    if ((ctx->constraints->max_width &&
+         ctx->constraints->max_width < frame->width) ||
+        (ctx->constraints->max_height &&
+         ctx->constraints->max_height < frame->height) ||
+        (ctx->constraints->min_width &&
+         ctx->constraints->min_width > frame->width) ||
+        (ctx->constraints->min_height &&
+         ctx->constraints->min_height > frame->height))
+        return 0;
+
+    if (ctx->constraints->valid_sw_formats) {
+        enum AVPixelFormat *sw_formats = ctx->constraints->valid_sw_formats;
+        while (*sw_formats != AV_PIX_FMT_NONE) {
+            if (*sw_formats == src_hw_frame->sw_format)
+                break;
+            sw_formats++;
+        }
+        if (*sw_formats == AV_PIX_FMT_NONE)
+            return 0;
+    }
+
+    ctx->hw_frame_ref = av_hwframe_ctx_alloc(ctx->hw_device_ref);
+    if (!ctx->hw_frame_ref)
+        return AVERROR(ENOMEM);
+
+    hw_frame = (AVHWFramesContext *) ctx->hw_frame_ref->data;
+    hw_frame->format = AV_PIX_FMT_VULKAN;
+    hw_frame->sw_format = src_hw_frame->sw_format;
+    hw_frame->width = frame->width;
+    hw_frame->height = frame->height;
+
+    if (frame->format == AV_PIX_FMT_CUDA) {
+        vk_frame_ctx = hw_frame->hwctx;
+        vk_frame_ctx->flags = AV_VK_FRAME_FLAG_DISABLE_MULTIPLANE;
+    }
+
+    ret = av_hwframe_ctx_init(ctx->hw_frame_ref);
+    if (ret < 0) {
+        av_log(renderer, AV_LOG_ERROR, "Create hwframe context failed, %s\n",
+               av_err2str(ret));
+        return ret;
+    }
+
+    av_hwframe_transfer_get_formats(ctx->hw_frame_ref,
+                                    AV_HWFRAME_TRANSFER_DIRECTION_TO,
+                                    &ctx->transfer_formats, 0);
+
+    return 0;
+}
+
+static inline int check_hw_transfer(RendererContext *ctx, AVFrame *frame)
+{
+    if (!ctx->hw_frame_ref || !ctx->transfer_formats)
+        return 0;
+
+    for (int i = 0; ctx->transfer_formats[i] != AV_PIX_FMT_NONE; i++)
+        if (ctx->transfer_formats[i] == frame->format)
+            return 1;
+
+    return 0;
+}
+
+static inline int move_to_output_frame(RendererContext *ctx, AVFrame *frame)
+{
+    int ret = av_frame_copy_props(ctx->vk_frame, frame);
+    if (ret < 0)
+        return ret;
+    av_frame_unref(frame);
+    av_frame_move_ref(frame, ctx->vk_frame);
+    return 0;
+}
+
+static int map_frame(VkRenderer *renderer, AVFrame *frame, int use_hw_frame)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    int ret;
+
+    if (use_hw_frame && !ctx->hw_frame_ref)
+        return AVERROR(ENOSYS);
+
+    // Try map data first
+    av_frame_unref(ctx->vk_frame);
+    if (use_hw_frame) {
+        ctx->vk_frame->hw_frames_ctx = av_buffer_ref(ctx->hw_frame_ref);
+        ctx->vk_frame->format = AV_PIX_FMT_VULKAN;
+    }
+    ret = av_hwframe_map(ctx->vk_frame, frame, 0);
+    if (!ret)
+        return move_to_output_frame(ctx, frame);
+
+    if (ret != AVERROR(ENOSYS))
+        av_log(NULL, AV_LOG_FATAL, "Map frame failed: %s\n", av_err2str(ret));
+    return ret;
+}
+
+static int transfer_frame(VkRenderer *renderer, AVFrame *frame, int use_hw_frame)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    int ret;
+
+    if (use_hw_frame && !check_hw_transfer(ctx, frame))
+        return AVERROR(ENOSYS);
+
+    av_frame_unref(ctx->vk_frame);
+    if (use_hw_frame)
+        av_hwframe_get_buffer(ctx->hw_frame_ref, ctx->vk_frame, 0);
+    ret = av_hwframe_transfer_data(ctx->vk_frame, frame, 1);
+    if (!ret)
+        return move_to_output_frame(ctx, frame);
+
+    if (ret != AVERROR(ENOSYS))
+        av_log(NULL, AV_LOG_FATAL, "Transfer frame failed: %s\n",
+               av_err2str(ret));
+    return ret;
+}
+
+static int convert_frame(VkRenderer *renderer, AVFrame *frame)
+{
+    int ret;
+
+    if (!frame->hw_frames_ctx)
+        return 0;
+
+    if (frame->format == AV_PIX_FMT_VULKAN)
+        return 0;
+
+    ret = create_hw_frame(renderer, frame);
+    if (ret < 0)
+        return ret;
+
+    for (int use_hw = 1; use_hw >=0; use_hw--) {
+        ret = map_frame(renderer, frame, use_hw);
+        if (!ret)
+            return 0;
+        if (ret != AVERROR(ENOSYS))
+            return ret;
+
+        ret = transfer_frame(renderer, frame, use_hw);
+        if (!ret)
+            return 0;
+        if (ret != AVERROR(ENOSYS))
+            return ret;
+    }
+
+    return ret;
+}
+
+static int display(VkRenderer *renderer, AVFrame *frame)
+{
+    struct pl_swapchain_frame swap_frame = {0};
+    struct pl_frame pl_frame = {0};
+    struct pl_frame target = {0};
+    RendererContext *ctx = (RendererContext *) renderer;
+    int ret = 0;
+
+    ret = convert_frame(renderer, frame);
+    if (ret < 0)
+        return ret;
+
+    if (!pl_map_avframe_ex(ctx->placebo_vulkan->gpu, &pl_frame, pl_avframe_params(
+            .frame = frame,
+            .tex = ctx->tex))) {
+        av_log(NULL, AV_LOG_ERROR, "pl_map_avframe_ex failed\n");
+        return AVERROR_EXTERNAL;
+    }
+
+    if (!pl_swapchain_start_frame(ctx->swapchain, &swap_frame)) {
+        av_log(NULL, AV_LOG_ERROR, "start frame failed\n");
+        ret = AVERROR_EXTERNAL;
+        goto out;
+    }
+
+    pl_frame_from_swapchain(&target, &swap_frame);
+    if (!pl_render_image(ctx->renderer, &pl_frame, &target,
+                         &pl_render_default_params)) {
+        av_log(NULL, AV_LOG_ERROR, "pl_render_image failed\n");
+        ret = AVERROR_EXTERNAL;
+        goto out;
+    }
+
+    if (!pl_swapchain_submit_frame(ctx->swapchain)) {
+        av_log(NULL, AV_LOG_ERROR, "pl_swapchain_submit_frame failed\n");
+        ret = AVERROR_EXTERNAL;
+        goto out;
+    }
+    pl_swapchain_swap_buffers(ctx->swapchain);
+
+out:
+    pl_unmap_avframe(ctx->placebo_vulkan->gpu, &pl_frame);
+    return ret;
+}
+
+static int resize(VkRenderer *renderer, int width, int height)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+
+    if (!pl_swapchain_resize(ctx->swapchain, &width, &height))
+        return AVERROR_EXTERNAL;
+    return 0;
+}
+
+static void destroy(VkRenderer *renderer)
+{
+    RendererContext *ctx = (RendererContext *) renderer;
+    PFN_vkDestroySurfaceKHR vkDestroySurfaceKHR;
+
+    av_frame_free(&ctx->vk_frame);
+    av_freep(&ctx->transfer_formats);
+    av_hwframe_constraints_free(&ctx->constraints);
+    av_buffer_unref(&ctx->hw_frame_ref);
+
+    if (ctx->placebo_vulkan) {
+        for (int i = 0; i < FF_ARRAY_ELEMS(ctx->tex); i++)
+            pl_tex_destroy(ctx->placebo_vulkan->gpu, &ctx->tex[i]);
+        pl_renderer_destroy(&ctx->renderer);
+        pl_swapchain_destroy(&ctx->swapchain);
+        pl_vulkan_destroy(&ctx->placebo_vulkan);
+    }
+
+    if (ctx->vk_surface) {
+        vkDestroySurfaceKHR = (PFN_vkDestroySurfaceKHR)
+                ctx->get_proc_addr(ctx->inst, "vkDestroySurfaceKHR");
+        vkDestroySurfaceKHR(ctx->inst, ctx->vk_surface, NULL);
+        ctx->vk_surface = NULL;
+    }
+
+    av_buffer_unref(&ctx->hw_device_ref);
+    pl_vk_inst_destroy(&ctx->placebo_instance);
+
+    pl_log_destroy(&ctx->vk_log);
+}
+
+static const AVClass vulkan_renderer_class = {
+        .class_name = "Vulkan Renderer",
+        .item_name  = av_default_item_name,
+        .version    = LIBAVUTIL_VERSION_INT,
+};
+
+VkRenderer *vk_get_renderer(void)
+{
+    RendererContext *ctx = av_mallocz(sizeof(*ctx));
+    VkRenderer *renderer;
+
+    if (!ctx)
+        return NULL;
+
+    renderer = &ctx->api;
+    renderer->class = &vulkan_renderer_class;
+    renderer->get_hw_dev = get_hw_dev;
+    renderer->create = create;
+    renderer->display = display;
+    renderer->resize = resize;
+    renderer->destroy = destroy;
+
+    return renderer;
+}
+
+#else
+
+VkRenderer *vk_get_renderer(void)
+{
+    return NULL;
+}
+
+#endif
+
+int vk_renderer_create(VkRenderer *renderer, SDL_Window *window,
+                       AVDictionary *opt)
+{
+    return renderer->create(renderer, window, opt);
+}
+
+int vk_renderer_get_hw_dev(VkRenderer *renderer, AVBufferRef **dev)
+{
+    return renderer->get_hw_dev(renderer, dev);
+}
+
+int vk_renderer_display(VkRenderer *renderer, AVFrame *frame)
+{
+    return renderer->display(renderer, frame);
+}
+
+int vk_renderer_resize(VkRenderer *renderer, int width, int height)
+{
+    return renderer->resize(renderer, width, height);
+}
+
+void vk_renderer_destroy(VkRenderer *renderer)
+{
+    renderer->destroy(renderer);
+}

fftools/ffplay_renderer.h

@@ -0,0 +1,41 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef FFTOOLS_FFPLAY_RENDERER_H
+#define FFTOOLS_FFPLAY_RENDERER_H
+
+#include <SDL.h>
+
+#include "libavutil/frame.h"
+
+typedef struct VkRenderer VkRenderer;
+
+VkRenderer *vk_get_renderer(void);
+
+int vk_renderer_create(VkRenderer *renderer, SDL_Window *window,
+                       AVDictionary *opt);
+
+int vk_renderer_get_hw_dev(VkRenderer *renderer, AVBufferRef **dev);
+
+int vk_renderer_display(VkRenderer *renderer, AVFrame *frame);
+
+int vk_renderer_resize(VkRenderer *renderer, int width, int height);
+
+void vk_renderer_destroy(VkRenderer *renderer);
+
+#endif /* FFTOOLS_FFPLAY_RENDERER_H */