hwcontext_vulkan: support threadsafe queue and frame operations

libavutil/hwcontext_vulkan.c

@@ -27,6 +27,7 @@
 #include <dlfcn.h>
 #endif
 
+#include "thread.h"
 #include <unistd.h>
 
 #include "config.h"
@@ -92,8 +93,10 @@ typedef struct VulkanDevicePriv {
     VkPhysicalDeviceVulkan13Features device_features_1_3;
 
     /* Queues */
-    uint32_t qfs[5];
+    pthread_mutex_t **qf_mutex;
-    int num_qfs;
+    uint32_t nb_tot_qfs;
+    uint32_t img_qfs[5];
+    uint32_t nb_img_qfs;
 
     /* Debug callback */
     VkDebugUtilsMessengerEXT debug_ctx;
@@ -127,6 +130,8 @@ typedef struct VulkanFramesPriv {
 } VulkanFramesPriv;
 
 typedef struct AVVkFrameInternal {
+    pthread_mutex_t update_mutex;
+
 #if CONFIG_CUDA
     /* Importing external memory into cuda is really expensive so we keep the
      * memory imported all the time */
@@ -1305,6 +1310,12 @@ static void vulkan_device_free(AVHWDeviceContext *ctx)
     if (p->libvulkan)
         dlclose(p->libvulkan);
 
+    for (uint32_t i = 0; i < p->nb_tot_qfs; i++) {
+        pthread_mutex_destroy(p->qf_mutex[i]);
+        av_freep(&p->qf_mutex[i]);
+    }
+    av_freep(&p->qf_mutex);
+
     RELEASE_PROPS(hwctx->enabled_inst_extensions, hwctx->nb_enabled_inst_extensions);
     RELEASE_PROPS(hwctx->enabled_dev_extensions, hwctx->nb_enabled_dev_extensions);
 }
@@ -1437,13 +1448,26 @@ end:
     return err;
 }
 
+static void lock_queue(AVHWDeviceContext *ctx, uint32_t queue_family, uint32_t index)
+{
+    VulkanDevicePriv *p = ctx->internal->priv;
+    pthread_mutex_lock(&p->qf_mutex[queue_family][index]);
+}
+
+static void unlock_queue(AVHWDeviceContext *ctx, uint32_t queue_family, uint32_t index)
+{
+    VulkanDevicePriv *p = ctx->internal->priv;
+    pthread_mutex_unlock(&p->qf_mutex[queue_family][index]);
+}
+
 static int vulkan_device_init(AVHWDeviceContext *ctx)
 {
     int err;
-    uint32_t queue_num;
+    uint32_t qf_num;
     AVVulkanDeviceContext *hwctx = ctx->hwctx;
     VulkanDevicePriv *p = ctx->internal->priv;
     FFVulkanFunctions *vk = &p->vkfn;
+    VkQueueFamilyProperties *qf;
     int graph_index, comp_index, tx_index, enc_index, dec_index;
 
     /* Set device extension flags */
@@ -1482,12 +1506,37 @@ static int vulkan_device_init(AVHWDeviceContext *ctx)
     p->dev_is_nvidia = (p->props.properties.vendorID == 0x10de);
     p->dev_is_intel  = (p->props.properties.vendorID == 0x8086);
 
-    vk->GetPhysicalDeviceQueueFamilyProperties(hwctx->phys_dev, &queue_num, NULL);
+    vk->GetPhysicalDeviceQueueFamilyProperties(hwctx->phys_dev, &qf_num, NULL);
-    if (!queue_num) {
+    if (!qf_num) {
         av_log(ctx, AV_LOG_ERROR, "Failed to get queues!\n");
         return AVERROR_EXTERNAL;
     }
 
+    qf = av_malloc_array(qf_num, sizeof(VkQueueFamilyProperties));
+    if (!qf)
+        return AVERROR(ENOMEM);
+
+    vk->GetPhysicalDeviceQueueFamilyProperties(hwctx->phys_dev, &qf_num, qf);
+
+    p->qf_mutex = av_calloc(qf_num, sizeof(*p->qf_mutex));
+    if (!p->qf_mutex)
+        return AVERROR(ENOMEM);
+    p->nb_tot_qfs = qf_num;
+
+    for (uint32_t i = 0; i < qf_num; i++) {
+        p->qf_mutex[i] = av_calloc(qf[i].queueCount, sizeof(**p->qf_mutex));
+        if (!p->qf_mutex[i])
+            return AVERROR(ENOMEM);
+        for (uint32_t j = 0; j < qf[i].queueCount; j++) {
+            err = pthread_mutex_init(&p->qf_mutex[i][j], NULL);
+            if (err != 0) {
+                av_log(ctx, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n",
+                       av_err2str(err));
+                return AVERROR(err);
+            }
+        }
+    }
+
     graph_index = hwctx->queue_family_index;
     comp_index  = hwctx->queue_family_comp_index;
     tx_index    = hwctx->queue_family_tx_index;
@@ -1502,9 +1551,9 @@ static int vulkan_device_init(AVHWDeviceContext *ctx)
             return AVERROR(EINVAL);                                                             \
         } else if (fidx < 0 || ctx_qf < 0) {                                                    \
             break;                                                                              \
-        } else if (ctx_qf >= queue_num) {                                                       \
+        } else if (ctx_qf >= qf_num) {                                                          \
             av_log(ctx, AV_LOG_ERROR, "Invalid %s family index %i (device has %i families)!\n", \
-                   type, ctx_qf, queue_num);                                                    \
+                   type, ctx_qf, qf_num);                                                       \
             return AVERROR(EINVAL);                                                             \
         }                                                                                       \
                                                                                                 \
@@ -1521,7 +1570,7 @@ static int vulkan_device_init(AVHWDeviceContext *ctx)
         tx_index    = (ctx_qf == tx_index)    ? -1 : tx_index;                                  \
         enc_index   = (ctx_qf == enc_index)   ? -1 : enc_index;                                 \
         dec_index   = (ctx_qf == dec_index)   ? -1 : dec_index;                                 \
-        p->qfs[p->num_qfs++] = ctx_qf;                                                          \
+        p->img_qfs[p->nb_img_qfs++] = ctx_qf;                                                   \
     } while (0)
 
     CHECK_QUEUE("graphics", 0, graph_index, hwctx->queue_family_index,        hwctx->nb_graphics_queues);
@@ -1532,6 +1581,11 @@ static int vulkan_device_init(AVHWDeviceContext *ctx)
 
 #undef CHECK_QUEUE
 
+    if (!hwctx->lock_queue)
+        hwctx->lock_queue = lock_queue;
+    if (!hwctx->unlock_queue)
+        hwctx->unlock_queue = unlock_queue;
+
     /* Get device capabilities */
     vk->GetPhysicalDeviceMemoryProperties(hwctx->phys_dev, &p->mprops);
 
@@ -1733,9 +1787,6 @@ static void vulkan_free_internal(AVVkFrame *f)
 {
     AVVkFrameInternal *internal = f->internal;
 
-    if (!internal)
-        return;
-
 #if CONFIG_CUDA
     if (internal->cuda_fc_ref) {
         AVHWFramesContext *cuda_fc = (AVHWFramesContext *)internal->cuda_fc_ref->data;
@@ -1764,6 +1815,7 @@ static void vulkan_free_internal(AVVkFrame *f)
     }
 #endif
 
+    pthread_mutex_destroy(&internal->update_mutex);
     av_freep(&f->internal);
 }
 
@@ -1924,9 +1976,11 @@ static int prepare_frame(AVHWFramesContext *hwfc, VulkanExecCtx *ectx,
     uint32_t src_qf, dst_qf;
     VkImageLayout new_layout;
     VkAccessFlags new_access;
+    AVVulkanFramesContext *vkfc = hwfc->hwctx;
     const int planes = av_pix_fmt_count_planes(hwfc->sw_format);
     VulkanDevicePriv *p = hwfc->device_ctx->internal->priv;
     FFVulkanFunctions *vk = &p->vkfn;
+    AVFrame tmp = { .data[0] = (uint8_t *)frame };
     uint64_t sem_sig_val[AV_NUM_DATA_POINTERS];
 
     VkImageMemoryBarrier img_bar[AV_NUM_DATA_POINTERS] = { 0 };
@@ -1945,6 +1999,12 @@ static int prepare_frame(AVHWFramesContext *hwfc, VulkanExecCtx *ectx,
     };
 
     VkPipelineStageFlagBits wait_st[AV_NUM_DATA_POINTERS];
+
+    if ((err = wait_start_exec_ctx(hwfc, ectx)))
+        return err;
+
+    vkfc->lock_frame(hwfc, frame);
+
     for (int i = 0; i < planes; i++) {
         wait_st[i] = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
         sem_sig_val[i] = frame->sem_value[i] + 1;
@@ -1981,9 +2041,6 @@ static int prepare_frame(AVHWFramesContext *hwfc, VulkanExecCtx *ectx,
         break;
     }
 
-    if ((err = wait_start_exec_ctx(hwfc, ectx)))
-        return err;
-
     /* Change the image layout to something more optimal for writes.
      * This also signals the newly created semaphore, making it usable
      * for synchronization */
@@ -2009,7 +2066,10 @@ static int prepare_frame(AVHWFramesContext *hwfc, VulkanExecCtx *ectx,
                            VK_PIPELINE_STAGE_TRANSFER_BIT,
                            0, 0, NULL, 0, NULL, planes, img_bar);
 
-    return submit_exec_ctx(hwfc, ectx, &s_info, frame, 0);
+    err = submit_exec_ctx(hwfc, ectx, &s_info, frame, 0);
+    vkfc->unlock_frame(hwfc, frame);
+
+    return err;
 }
 
 static inline void get_plane_wh(int *w, int *h, enum AVPixelFormat format,
@@ -2091,10 +2151,10 @@ static int create_frame(AVHWFramesContext *hwfc, AVVkFrame **frame,
             .initialLayout         = VK_IMAGE_LAYOUT_UNDEFINED,
             .usage                 = usage,
             .samples               = VK_SAMPLE_COUNT_1_BIT,
-            .pQueueFamilyIndices   = p->qfs,
+            .pQueueFamilyIndices   = p->img_qfs,
-            .queueFamilyIndexCount = p->num_qfs,
+            .queueFamilyIndexCount = p->nb_img_qfs,
-            .sharingMode           = p->num_qfs > 1 ? VK_SHARING_MODE_CONCURRENT :
+            .sharingMode           = p->nb_img_qfs > 1 ? VK_SHARING_MODE_CONCURRENT :
-                                                      VK_SHARING_MODE_EXCLUSIVE,
+                                                         VK_SHARING_MODE_EXCLUSIVE,
         };
 
         get_plane_wh(&create_info.extent.width, &create_info.extent.height,
@@ -2118,6 +2178,7 @@ static int create_frame(AVHWFramesContext *hwfc, AVVkFrame **frame,
             return AVERROR_EXTERNAL;
         }
 
+        f->queue_family[i] = p->nb_img_qfs > 1 ? VK_QUEUE_FAMILY_IGNORED : p->img_qfs[0];
         f->layout[i] = create_info.initialLayout;
         f->access[i] = 0x0;
         f->sem_value[i] = 0;
@@ -2162,10 +2223,10 @@ static void try_export_flags(AVHWFramesContext *hwfc,
     VkPhysicalDeviceImageDrmFormatModifierInfoEXT phy_dev_mod_info = {
         .sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_DRM_FORMAT_MODIFIER_INFO_EXT,
         .pNext = NULL,
-        .pQueueFamilyIndices   = p->qfs,
+        .pQueueFamilyIndices   = p->img_qfs,
-        .queueFamilyIndexCount = p->num_qfs,
+        .queueFamilyIndexCount = p->nb_img_qfs,
-        .sharingMode           = p->num_qfs > 1 ? VK_SHARING_MODE_CONCURRENT :
+        .sharingMode           = p->nb_img_qfs > 1 ? VK_SHARING_MODE_CONCURRENT :
-                                                  VK_SHARING_MODE_EXCLUSIVE,
+                                                     VK_SHARING_MODE_EXCLUSIVE,
     };
     VkPhysicalDeviceExternalImageFormatInfo enext = {
         .sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_IMAGE_FORMAT_INFO,
@@ -2260,6 +2321,16 @@ fail:
     return NULL;
 }
 
+static void lock_frame(AVHWFramesContext *fc, AVVkFrame *vkf)
+{
+    pthread_mutex_lock(&vkf->internal->update_mutex);
+}
+
+static void unlock_frame(AVHWFramesContext *fc, AVVkFrame *vkf)
+{
+    pthread_mutex_unlock(&vkf->internal->update_mutex);
+}
+
 static void vulkan_frames_uninit(AVHWFramesContext *hwfc)
 {
     VulkanFramesPriv *fp = hwfc->internal->priv;
@@ -2422,6 +2493,11 @@ static int vulkan_frames_init(AVHWFramesContext *hwfc)
             return AVERROR(ENOMEM);
     }
 
+    if (!hwctx->lock_frame)
+        hwctx->lock_frame = lock_frame;
+    if (!hwctx->unlock_frame)
+        hwctx->unlock_frame = unlock_frame;
+
     return 0;
 }
 
@@ -2728,10 +2804,10 @@ static int vulkan_map_from_drm_frame_desc(AVHWFramesContext *hwfc, AVVkFrame **f
             .usage                 = VK_IMAGE_USAGE_SAMPLED_BIT |
                                      VK_IMAGE_USAGE_TRANSFER_SRC_BIT,
             .samples               = VK_SAMPLE_COUNT_1_BIT,
-            .pQueueFamilyIndices   = p->qfs,
+            .pQueueFamilyIndices   = p->img_qfs,
-            .queueFamilyIndexCount = p->num_qfs,
+            .queueFamilyIndexCount = p->nb_img_qfs,
-            .sharingMode           = p->num_qfs > 1 ? VK_SHARING_MODE_CONCURRENT :
+            .sharingMode           = p->nb_img_qfs > 1 ? VK_SHARING_MODE_CONCURRENT :
-                                                      VK_SHARING_MODE_EXCLUSIVE,
+                                                         VK_SHARING_MODE_EXCLUSIVE,
         };
 
         /* Image format verification */
@@ -2810,6 +2886,7 @@ static int vulkan_map_from_drm_frame_desc(AVHWFramesContext *hwfc, AVVkFrame **f
          * offer us anything we could import and sync with, so instead
          * just signal the semaphore we created. */
 
+        f->queue_family[i] = p->nb_img_qfs > 1 ? VK_QUEUE_FAMILY_IGNORED : p->img_qfs[0];
         f->layout[i] = create_info.initialLayout;
         f->access[i] = 0x0;
         f->sem_value[i] = 0;
@@ -3018,20 +3095,12 @@ static int vulkan_export_to_cuda(AVHWFramesContext *hwfc,
                                                      CU_AD_FORMAT_UNSIGNED_INT8;
 
     dst_f = (AVVkFrame *)frame->data[0];
-
     dst_int = dst_f->internal;
-    if (!dst_int || !dst_int->cuda_fc_ref) {
-        if (!dst_f->internal)
-            dst_f->internal = dst_int = av_mallocz(sizeof(*dst_f->internal));
-
-        if (!dst_int)
-            return AVERROR(ENOMEM);
 
+    if (!dst_int->cuda_fc_ref) {
         dst_int->cuda_fc_ref = av_buffer_ref(cuda_hwfc);
-        if (!dst_int->cuda_fc_ref) {
+        if (!dst_int->cuda_fc_ref)
-            av_freep(&dst_f->internal);
             return AVERROR(ENOMEM);
-        }
 
         for (int i = 0; i < planes; i++) {
             CUDA_EXTERNAL_MEMORY_MIPMAPPED_ARRAY_DESC tex_desc = {
@@ -3705,13 +3774,14 @@ static int unmap_buffers(AVHWDeviceContext *ctx, AVBufferRef **bufs,
     return err;
 }
 
-static int transfer_image_buf(AVHWFramesContext *hwfc, const AVFrame *f,
+static int transfer_image_buf(AVHWFramesContext *hwfc, AVFrame *f,
                               AVBufferRef **bufs, size_t *buf_offsets,
                               const int *buf_stride, int w,
                               int h, enum AVPixelFormat pix_fmt, int to_buf)
 {
     int err;
     AVVkFrame *frame = (AVVkFrame *)f->data[0];
+    AVVulkanFramesContext *vkfc = hwfc->hwctx;
     VulkanFramesPriv *fp = hwfc->internal->priv;
     VulkanDevicePriv *p = hwfc->device_ctx->internal->priv;
     FFVulkanFunctions *vk = &p->vkfn;
@@ -3746,11 +3816,13 @@ static int transfer_image_buf(AVHWFramesContext *hwfc, const AVFrame *f,
         .waitSemaphoreCount   = planes,
     };
 
-    for (int i = 0; i < planes; i++)
+    vkfc->lock_frame(hwfc, frame);
-        sem_signal_values[i] = frame->sem_value[i] + 1;
 
     if ((err = wait_start_exec_ctx(hwfc, ectx)))
-        return err;
+        goto end;
+
+    for (int i = 0; i < planes; i++)
+        sem_signal_values[i] = frame->sem_value[i] + 1;
 
     /* Change the image layout to something more optimal for transfers */
     for (int i = 0; i < planes; i++) {
@@ -3825,14 +3897,18 @@ static int transfer_image_buf(AVHWFramesContext *hwfc, const AVFrame *f,
             if (!f->buf[ref])
                 break;
             if ((err = add_buf_dep_exec_ctx(hwfc, ectx, &f->buf[ref], 1)))
-                return err;
+                goto end;
         }
         if (ref && (err = add_buf_dep_exec_ctx(hwfc, ectx, bufs, planes)))
-            return err;
+            goto end;
-        return submit_exec_ctx(hwfc, ectx, &s_info, frame, !ref);
+        err = submit_exec_ctx(hwfc, ectx, &s_info, frame, !ref);
     } else {
-        return submit_exec_ctx(hwfc, ectx, &s_info, frame,    1);
+        err = submit_exec_ctx(hwfc, ectx, &s_info, frame,    1);
     }
+
+end:
+    vkfc->unlock_frame(hwfc, frame);
+    return err;
 }
 
 static int vulkan_transfer_data(AVHWFramesContext *hwfc, const AVFrame *vkf,
@@ -3961,8 +4037,9 @@ static int vulkan_transfer_data(AVHWFramesContext *hwfc, const AVFrame *vkf,
     }
 
     /* Copy buffers into/from image */
-    err = transfer_image_buf(hwfc, vkf, bufs, buf_offsets, tmp.linesize,
+    err = transfer_image_buf(hwfc, (AVFrame *)vkf, bufs, buf_offsets,
-                             swf->width, swf->height, swf->format, from);
+                             tmp.linesize, swf->width, swf->height, swf->format,
+                             from);
 
     if (from) {
         /* Map, copy buffer (which came FROM the VkImage) to the frame, unmap */
@@ -4143,7 +4220,25 @@ static int vulkan_frames_derive_to(AVHWFramesContext *dst_fc,
 
 AVVkFrame *av_vk_frame_alloc(void)
 {
-    return av_mallocz(sizeof(AVVkFrame));
+    int err;
+    AVVkFrame *f = av_mallocz(sizeof(AVVkFrame));
+    if (!f)
+        return NULL;
+
+    f->internal = av_mallocz(sizeof(*f->internal));
+    if (!f->internal) {
+        av_free(f);
+        return NULL;
+    }
+
+    err = pthread_mutex_init(&f->internal->update_mutex, NULL);
+    if (err != 0) {
+        av_free(f->internal);
+        av_free(f);
+        return NULL;
+    }
+
+    return f;
 }
 
 const HWContextType ff_hwcontext_type_vulkan = {

libavutil/hwcontext_vulkan.h

@@ -27,6 +27,8 @@
 #include "pixfmt.h"
 #include "frame.h"
 
+typedef struct AVVkFrame AVVkFrame;
+
 /**
  * @file
  * API-specific header for AV_HWDEVICE_TYPE_VULKAN.
@@ -135,6 +137,19 @@ typedef struct AVVulkanDeviceContext {
      */
     int queue_family_decode_index;
     int nb_decode_queues;
+
+    /**
+     * Locks a queue, preventing other threads from submitting any command
+     * buffers to this queue.
+     * If set to NULL, will be set to lavu-internal functions that utilize a
+     * mutex.
+     */
+    void (*lock_queue)(struct AVHWDeviceContext *ctx, uint32_t queue_family, uint32_t index);
+
+    /**
+     * Similar to lock_queue(), unlocks a queue. Must only be called after locking.
+     */
+    void (*unlock_queue)(struct AVHWDeviceContext *ctx, uint32_t queue_family, uint32_t index);
 } AVVulkanDeviceContext;
 
 /**
@@ -195,6 +210,21 @@ typedef struct AVVulkanFramesContext {
      * av_hwframe_ctx_init().
      */
     AVVkFrameFlags flags;
+
+    /**
+     * Locks a frame, preventing other threads from changing frame properties.
+     * Users SHOULD only ever lock just before command submission in order
+     * to get accurate frame properties, and unlock immediately after command
+     * submission without waiting for it to finish.
+     *
+     * If unset, will be set to lavu-internal functions that utilize a mutex.
+     */
+    void (*lock_frame)(struct AVHWFramesContext *fc, AVVkFrame *vkf);
+
+    /**
+     * Similar to lock_frame(), unlocks a frame. Must only be called after locking.
+     */
+    void (*unlock_frame)(struct AVHWFramesContext *fc, AVVkFrame *vkf);
 } AVVulkanFramesContext;
 
 /*
@@ -210,7 +240,7 @@ typedef struct AVVulkanFramesContext {
  * @note the size of this structure is not part of the ABI, to allocate
  * you must use @av_vk_frame_alloc().
  */
-typedef struct AVVkFrame {
+struct AVVkFrame {
     /**
      * Vulkan images to which the memory is bound to.
      */
@@ -264,6 +294,12 @@ typedef struct AVVkFrame {
      * Describes the binding offset of each plane to the VkDeviceMemory.
      */
     ptrdiff_t offset[AV_NUM_DATA_POINTERS];
+
+    /**
+     * Queue family of the images. Must be VK_QUEUE_FAMILY_IGNORED if
+     * the image was allocated with the CONCURRENT concurrency option.
+     */
+    uint32_t queue_family[AV_NUM_DATA_POINTERS];
 } AVVkFrame;
 
 /**