virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

vulkan: add support for encode and decode queues and refactor queue code

Browse Source 
This simplifies and makes queue family picking simpler and more robust.
The requirements on the device context are relaxed. They made no sense
in the first place.

The video encode/decode extension is still in beta, at least on paper,
but I really doubt they'd change needing a separate queue family.
This commit is contained in:
Lynne 2021-11-07 08:16:11 +01:00
parent dfc61800a2
commit 6bf9a6539e
No known key found for this signature in database
GPG Key ID: A2FEA5F03F034464
7 changed files with 207 additions and 146 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavfilter/vf_avgblur_vulkan.c
View File

@ -99,8 +99,7 @@ static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
return AVERROR_EXTERNAL;
s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
s->vkctx.cur_queue_idx = av_get_random_seed() % s->vkctx.queue_count;
s->vkctx.queue_count = s->vkctx.hwctx->nb_comp_queues;
{ /* Create shader for the horizontal pass */
desc_i[0].updater = s->input_images;

3
libavfilter/vf_chromaber_vulkan.c
View File

@ -75,8 +75,7 @@ static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
return AVERROR_EXTERNAL;
s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
s->vkctx.cur_queue_idx = av_get_random_seed() % s->vkctx.queue_count;
s->vkctx.queue_count = s->vkctx.hwctx->nb_comp_queues;
s->pl = ff_vk_create_pipeline(ctx);
if (!s->pl)

3
libavfilter/vf_overlay_vulkan.c
View File

@ -89,8 +89,7 @@ static av_cold int init_filter(AVFilterContext *ctx)
return AVERROR(ENOMEM);
s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
s->vkctx.cur_queue_idx = av_get_random_seed() % s->vkctx.queue_count;
s->vkctx.queue_count = s->vkctx.hwctx->nb_comp_queues;
{ /* Create the shader */
const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);

3
libavfilter/vf_scale_vulkan.c
View File

@ -117,8 +117,7 @@ static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
int crop_h = in->height - (in->crop_top + in->crop_bottom);
s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
s->vkctx.cur_queue_idx = av_get_random_seed() % s->vkctx.queue_count;
s->vkctx.queue_count = s->vkctx.hwctx->nb_comp_queues;
switch (s->scaler) {
case F_NEAREST:

11
libavfilter/vulkan.h
View File

@ -49,17 +49,6 @@
goto fail; \
} while (0)
/* Gets the queues count for a single queue family */
#define GET_QUEUE_COUNT(hwctx, graph, comp, tx) ( \
graph ? hwctx->nb_graphics_queues : \
comp ? (hwctx->nb_comp_queues ? \
hwctx->nb_comp_queues : hwctx->nb_graphics_queues) : \
tx ? (hwctx->nb_tx_queues ? hwctx->nb_tx_queues : \
(hwctx->nb_comp_queues ? \
hwctx->nb_comp_queues : hwctx->nb_graphics_queues)) : \
0 \
)
/* Useful for attaching immutable samplers to arrays */
#define DUP_SAMPLER_ARRAY4(x) (VkSampler []){ x, x, x, x, }

290
libavutil/hwcontext_vulkan.c
View File

@ -17,6 +17,7 @@
*/
#define VK_NO_PROTOTYPES
#define VK_ENABLE_BETA_EXTENSIONS
#include <unistd.h>
@ -25,6 +26,7 @@
#include "avstring.h"
#include "imgutils.h"
#include "hwcontext.h"
#include "avassert.h"
#include "hwcontext_internal.h"
#include "hwcontext_vulkan.h"
@ -204,7 +206,7 @@ typedef struct VulkanDevicePriv {
VkPhysicalDeviceVulkan12Features device_features_1_2;
/* Queues */
uint32_t qfs[3];
uint32_t qfs[5];
int num_qfs;
/* Debug callback */
@ -242,16 +244,6 @@ typedef struct AVVkFrameInternal {
#endif
} AVVkFrameInternal;
#define GET_QUEUE_COUNT(hwctx, graph, comp, tx) ( \
graph ? hwctx->nb_graphics_queues : \
comp ? (hwctx->nb_comp_queues ? \
hwctx->nb_comp_queues : hwctx->nb_graphics_queues) : \
tx ? (hwctx->nb_tx_queues ? hwctx->nb_tx_queues : \
(hwctx->nb_comp_queues ? \
hwctx->nb_comp_queues : hwctx->nb_graphics_queues)) : \
0 \
)
#define DEFAULT_USAGE_FLAGS (VK_IMAGE_USAGE_SAMPLED_BIT | \
VK_IMAGE_USAGE_STORAGE_BIT | \
VK_IMAGE_USAGE_TRANSFER_SRC_BIT | \
@ -903,16 +895,39 @@ end:
return err;
}
static int search_queue_families(AVHWDeviceContext *ctx, VkDeviceCreateInfo *cd)
/* Picks the least used qf with the fewest unneeded flags, or -1 if none found */
static inline int pick_queue_family(VkQueueFamilyProperties *qf, uint32_t num_qf,
VkQueueFlagBits flags)
{
int index = -1;
uint32_t min_score = UINT32_MAX;
for (int i = 0; i < num_qf; i++) {
const VkQueueFlagBits qflags = qf[i].queueFlags;
if (qflags & flags) {
uint32_t score = av_popcount(qflags) + qf[i].timestampValidBits;
if (score < min_score) {
index = i;
min_score = score;
}
}
}
if (index > -1)
qf[index].timestampValidBits++;
return index;
}
static int setup_queue_families(AVHWDeviceContext *ctx, VkDeviceCreateInfo *cd)
{
uint32_t num;
float *weights;
VkQueueFamilyProperties *qs = NULL;
VkQueueFamilyProperties *qf = NULL;
VulkanDevicePriv *p = ctx->internal->priv;
VulkanFunctions *vk = &p->vkfn;
AVVulkanDeviceContext *hwctx = ctx->hwctx;
int graph_index = -1, comp_index = -1, tx_index = -1;
VkDeviceQueueCreateInfo *pc = (VkDeviceQueueCreateInfo *)cd->pQueueCreateInfos;
int graph_index, comp_index, tx_index, enc_index, dec_index;
/* First get the number of queue families */
vk->GetPhysicalDeviceQueueFamilyProperties(hwctx->phys_dev, &num, NULL);
@ -922,81 +937,113 @@ static int search_queue_families(AVHWDeviceContext *ctx, VkDeviceCreateInfo *cd)
}
/* Then allocate memory */
qs = av_malloc_array(num, sizeof(VkQueueFamilyProperties));
if (!qs)
qf = av_malloc_array(num, sizeof(VkQueueFamilyProperties));
if (!qf)
return AVERROR(ENOMEM);
/* Finally retrieve the queue families */
vk->GetPhysicalDeviceQueueFamilyProperties(hwctx->phys_dev, &num, qs);
vk->GetPhysicalDeviceQueueFamilyProperties(hwctx->phys_dev, &num, qf);
#define SEARCH_FLAGS(expr, out) \
for (int i = 0; i < num; i++) { \
const VkQueueFlagBits flags = qs[i].queueFlags; \
if (expr) { \
out = i; \
break; \
av_log(ctx, AV_LOG_VERBOSE, "Queue families:\n");
for (int i = 0; i < num; i++) {
av_log(ctx, AV_LOG_VERBOSE, " %i:%s%s%s%s%s%s%s (queues: %i)\n", i,
((qf[i].queueFlags) & VK_QUEUE_GRAPHICS_BIT) ? " graphics" : "",
((qf[i].queueFlags) & VK_QUEUE_COMPUTE_BIT) ? " compute" : "",
((qf[i].queueFlags) & VK_QUEUE_TRANSFER_BIT) ? " transfer" : "",
((qf[i].queueFlags) & VK_QUEUE_VIDEO_ENCODE_BIT_KHR) ? " encode" : "",
((qf[i].queueFlags) & VK_QUEUE_VIDEO_DECODE_BIT_KHR) ? " decode" : "",
((qf[i].queueFlags) & VK_QUEUE_SPARSE_BINDING_BIT) ? " sparse" : "",
((qf[i].queueFlags) & VK_QUEUE_PROTECTED_BIT) ? " protected" : "",
qf[i].queueCount);
/* We use this field to keep a score of how many times we've used that
* queue family in order to make better choices. */
qf[i].timestampValidBits = 0;
}
/* Pick each queue family to use */
graph_index = pick_queue_family(qf, num, VK_QUEUE_GRAPHICS_BIT);
comp_index = pick_queue_family(qf, num, VK_QUEUE_COMPUTE_BIT);
tx_index = pick_queue_family(qf, num, VK_QUEUE_TRANSFER_BIT);
enc_index = pick_queue_family(qf, num, VK_QUEUE_VIDEO_ENCODE_BIT_KHR);
dec_index = pick_queue_family(qf, num, VK_QUEUE_VIDEO_DECODE_BIT_KHR);
hwctx->queue_family_index = -1;
hwctx->queue_family_comp_index = -1;
hwctx->queue_family_tx_index = -1;
hwctx->queue_family_encode_index = -1;
hwctx->queue_family_decode_index = -1;
#define SETUP_QUEUE(qf_idx) \
if (qf_idx > -1) { \
int fidx = qf_idx; \
int qc = qf[fidx].queueCount; \
VkDeviceQueueCreateInfo *pc; \
\
if (fidx == graph_index) { \
hwctx->queue_family_index = fidx; \
hwctx->nb_graphics_queues = qc; \
graph_index = -1; \
} \
if (fidx == comp_index) { \
hwctx->queue_family_comp_index = fidx; \
hwctx->nb_comp_queues = qc; \
comp_index = -1; \
} \
if (fidx == tx_index) { \
hwctx->queue_family_tx_index = fidx; \
hwctx->nb_tx_queues = qc; \
tx_index = -1; \
} \
if (fidx == enc_index) { \
hwctx->queue_family_encode_index = fidx; \
hwctx->nb_encode_queues = qc; \
enc_index = -1; \
} \
if (fidx == dec_index) { \
hwctx->queue_family_decode_index = fidx; \
hwctx->nb_decode_queues = qc; \
dec_index = -1; \
} \
\
pc = av_realloc((void *)cd->pQueueCreateInfos, \
sizeof(*pc) * (cd->queueCreateInfoCount + 1)); \
if (!pc) { \
av_free(qf); \
return AVERROR(ENOMEM); \
} \
cd->pQueueCreateInfos = pc; \
pc = &pc[cd->queueCreateInfoCount]; \
\
weights = av_malloc(qc * sizeof(float)); \
if (!weights) { \
av_free(qf); \
return AVERROR(ENOMEM); \
} \
\
memset(pc, 0, sizeof(*pc)); \
pc->sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO; \
pc->queueFamilyIndex = fidx; \
pc->queueCount = qc; \
pc->pQueuePriorities = weights; \
\
for (int i = 0; i < qc; i++) \
weights[i] = 1.0f / qc; \
\
cd->queueCreateInfoCount++; \
}
SEARCH_FLAGS(flags & VK_QUEUE_GRAPHICS_BIT, graph_index)
SEARCH_FLAGS((flags & VK_QUEUE_COMPUTE_BIT) && (i != graph_index),
comp_index)
SEARCH_FLAGS((flags & VK_QUEUE_TRANSFER_BIT) && (i != graph_index) &&
(i != comp_index), tx_index)
#undef SEARCH_FLAGS
#define ADD_QUEUE(fidx, graph, comp, tx) \
av_log(ctx, AV_LOG_VERBOSE, "Using queue family %i (total queues: %i) for %s%s%s\n", \
fidx, qs[fidx].queueCount, graph ? "graphics " : "", \
comp ? "compute " : "", tx ? "transfers " : ""); \
av_log(ctx, AV_LOG_VERBOSE, " QF %i flags: %s%s%s%s\n", fidx, \
((qs[fidx].queueFlags) & VK_QUEUE_GRAPHICS_BIT) ? "(graphics) " : "", \
((qs[fidx].queueFlags) & VK_QUEUE_COMPUTE_BIT) ? "(compute) " : "", \
((qs[fidx].queueFlags) & VK_QUEUE_TRANSFER_BIT) ? "(transfers) " : "", \
((qs[fidx].queueFlags) & VK_QUEUE_SPARSE_BINDING_BIT) ? "(sparse) " : ""); \
pc[cd->queueCreateInfoCount].queueFamilyIndex = fidx; \
pc[cd->queueCreateInfoCount].queueCount = qs[fidx].queueCount; \
weights = av_malloc(qs[fidx].queueCount * sizeof(float)); \
pc[cd->queueCreateInfoCount].pQueuePriorities = weights; \
if (!weights) \
goto fail; \
for (int i = 0; i < qs[fidx].queueCount; i++) \
weights[i] = 1.0f; \
cd->queueCreateInfoCount++;
ADD_QUEUE(graph_index, 1, comp_index < 0, tx_index < 0 && comp_index < 0)
hwctx->queue_family_index = graph_index;
hwctx->queue_family_comp_index = graph_index;
hwctx->queue_family_tx_index = graph_index;
hwctx->nb_graphics_queues = qs[graph_index].queueCount;
if (comp_index != -1) {
ADD_QUEUE(comp_index, 0, 1, tx_index < 0)
hwctx->queue_family_tx_index = comp_index;
hwctx->queue_family_comp_index = comp_index;
hwctx->nb_comp_queues = qs[comp_index].queueCount;
}
if (tx_index != -1) {
ADD_QUEUE(tx_index, 0, 0, 1)
hwctx->queue_family_tx_index = tx_index;
hwctx->nb_tx_queues = qs[tx_index].queueCount;
}
SETUP_QUEUE(graph_index)
SETUP_QUEUE(comp_index)
SETUP_QUEUE(tx_index)
SETUP_QUEUE(enc_index)
SETUP_QUEUE(dec_index)
#undef ADD_QUEUE
av_free(qs);
av_free(qf);
return 0;
fail:
av_freep(&pc[0].pQueuePriorities);
av_freep(&pc[1].pQueuePriorities);
av_freep(&pc[2].pQueuePriorities);
av_free(qs);
return AVERROR(ENOMEM);
}
static int create_exec_ctx(AVHWFramesContext *hwfc, VulkanExecCtx *cmd,
@ -1271,17 +1318,10 @@ static int vulkan_device_create_internal(AVHWDeviceContext *ctx,
.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2,
.pNext = &dev_features_1_1,
};
VkDeviceQueueCreateInfo queue_create_info[3] = {
{ .sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, },
{ .sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, },
{ .sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, },
};
VkDeviceCreateInfo dev_info = {
.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
.pNext = &hwctx->device_features,
.pQueueCreateInfos = queue_create_info,
.queueCreateInfoCount = 0,
};
hwctx->device_features.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2;
@ -1318,24 +1358,24 @@ static int vulkan_device_create_internal(AVHWDeviceContext *ctx,
}
p->device_features_1_2.timelineSemaphore = 1;
/* Search queue family */
if ((err = search_queue_families(ctx, &dev_info)))
/* Setup queue family */
if ((err = setup_queue_families(ctx, &dev_info)))
goto end;
if ((err = check_extensions(ctx, 1, opts, &dev_info.ppEnabledExtensionNames,
&dev_info.enabledExtensionCount, 0))) {
av_free((void *)queue_create_info[0].pQueuePriorities);
av_free((void *)queue_create_info[1].pQueuePriorities);
av_free((void *)queue_create_info[2].pQueuePriorities);
for (int i = 0; i < dev_info.queueCreateInfoCount; i++)
av_free((void *)dev_info.pQueueCreateInfos[i].pQueuePriorities);
av_free((void *)dev_info.pQueueCreateInfos);
goto end;
}
ret = vk->CreateDevice(hwctx->phys_dev, &dev_info, hwctx->alloc,
&hwctx->act_dev);
av_free((void *)queue_create_info[0].pQueuePriorities);
av_free((void *)queue_create_info[1].pQueuePriorities);
av_free((void *)queue_create_info[2].pQueuePriorities);
for (int i = 0; i < dev_info.queueCreateInfoCount; i++)
av_free((void *)dev_info.pQueueCreateInfos[i].pQueuePriorities);
av_free((void *)dev_info.pQueueCreateInfos);
if (ret != VK_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "Device creation failure: %s\n",
@ -1366,6 +1406,7 @@ static int vulkan_device_init(AVHWDeviceContext *ctx)
AVVulkanDeviceContext *hwctx = ctx->hwctx;
VulkanDevicePriv *p = ctx->internal->priv;
VulkanFunctions *vk = &p->vkfn;
int graph_index, comp_index, tx_index, enc_index, dec_index;
/* Set device extension flags */
for (int i = 0; i < hwctx->nb_enabled_dev_extensions; i++) {
@ -1410,27 +1451,50 @@ static int vulkan_device_init(AVHWDeviceContext *ctx)
return AVERROR_EXTERNAL;
}
#define CHECK_QUEUE(type, n) \
if (n >= queue_num) { \
av_log(ctx, AV_LOG_ERROR, "Invalid %s queue index %i (device has %i queues)!\n", \
type, n, queue_num); \
return AVERROR(EINVAL); \
}
graph_index = hwctx->queue_family_index;
comp_index = hwctx->queue_family_comp_index;
tx_index = hwctx->queue_family_tx_index;
enc_index = hwctx->queue_family_encode_index;
dec_index = hwctx->queue_family_decode_index;
CHECK_QUEUE("graphics", hwctx->queue_family_index)
CHECK_QUEUE("upload", hwctx->queue_family_tx_index)
CHECK_QUEUE("compute", hwctx->queue_family_comp_index)
#define CHECK_QUEUE(type, required, fidx, ctx_qf, qc) \
do { \
if (ctx_qf < 0 && required) { \
av_log(ctx, AV_LOG_ERROR, "%s queue family is required, but marked as missing" \
" in the context!\n", type); \
return AVERROR(EINVAL); \
} else if (fidx < 0 || ctx_qf < 0) { \
break; \
} else if (ctx_qf >= queue_num) { \
av_log(ctx, AV_LOG_ERROR, "Invalid %s family index %i (device has %i families)!\n", \
type, ctx_qf, queue_num); \
return AVERROR(EINVAL); \
} \
\
av_log(ctx, AV_LOG_VERBOSE, "Using queue family %i (queues: %i)" \
" for%s%s%s%s%s\n", \
ctx_qf, qc, \
ctx_qf == graph_index ? " graphics" : "", \
ctx_qf == comp_index ? " compute" : "", \
ctx_qf == tx_index ? " transfers" : "", \
ctx_qf == enc_index ? " encode" : "", \
ctx_qf == dec_index ? " decode" : ""); \
graph_index = (ctx_qf == graph_index) ? -1 : graph_index; \
comp_index = (ctx_qf == comp_index) ? -1 : comp_index; \
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; \
} while (0)
CHECK_QUEUE("graphics", 0, graph_index, hwctx->queue_family_index, hwctx->nb_graphics_queues);
CHECK_QUEUE("upload", 1, tx_index, hwctx->queue_family_tx_index, hwctx->nb_tx_queues);
CHECK_QUEUE("compute", 1, comp_index, hwctx->queue_family_comp_index, hwctx->nb_comp_queues);
CHECK_QUEUE("encode", 0, enc_index, hwctx->queue_family_encode_index, hwctx->nb_encode_queues);
CHECK_QUEUE("decode", 0, dec_index, hwctx->queue_family_decode_index, hwctx->nb_decode_queues);
#undef CHECK_QUEUE
p->qfs[p->num_qfs++] = hwctx->queue_family_index;
if ((hwctx->queue_family_tx_index != hwctx->queue_family_index) &&
(hwctx->queue_family_tx_index != hwctx->queue_family_comp_index))
p->qfs[p->num_qfs++] = hwctx->queue_family_tx_index;
if ((hwctx->queue_family_comp_index != hwctx->queue_family_index) &&
(hwctx->queue_family_comp_index != hwctx->queue_family_tx_index))
p->qfs[p->num_qfs++] = hwctx->queue_family_comp_index;
/* Get device capabilities */
vk->GetPhysicalDeviceMemoryProperties(hwctx->phys_dev, &p->mprops);
@ -2076,13 +2140,13 @@ static int vulkan_frames_init(AVHWFramesContext *hwfc)
err = create_exec_ctx(hwfc, &fp->conv_ctx,
dev_hwctx->queue_family_comp_index,
GET_QUEUE_COUNT(dev_hwctx, 0, 1, 0));
dev_hwctx->nb_comp_queues);
if (err)
return err;
err = create_exec_ctx(hwfc, &fp->upload_ctx,
dev_hwctx->queue_family_tx_index,
GET_QUEUE_COUNT(dev_hwctx, 0, 0, 1));
dev_hwctx->nb_tx_queues);
if (err)
return err;

40
libavutil/hwcontext_vulkan.h
View File

@ -94,32 +94,44 @@ typedef struct AVVulkanDeviceContext {
int nb_enabled_dev_extensions;
/**
* Queue family index for graphics
* @note av_hwdevice_create() will set all 3 queue indices if unset
* If there is no dedicated queue for compute or transfer operations,
* they will be set to the graphics queue index which can handle both.
* nb_graphics_queues indicates how many queues were enabled for the
* graphics queue (must be at least 1)
* Queue family index for graphics operations, and the number of queues
* enabled for it. If unavaiable, will be set to -1. Not required.
* av_hwdevice_create() will attempt to find a dedicated queue for each
* queue family, or pick the one with the least unrelated flags set.
* Queue indices here may overlap if a queue has to share capabilities.
*/
int queue_family_index;
int nb_graphics_queues;
/**
* Queue family index to use for transfer operations, and the amount of queues
* enabled. In case there is no dedicated transfer queue, nb_tx_queues
* must be 0 and queue_family_tx_index must be the same as either the graphics
* queue or the compute queue, if available.
* Queue family index for transfer operations and the number of queues
* enabled. Required.
*/
int queue_family_tx_index;
int nb_tx_queues;
/**
* Queue family index for compute ops, and the amount of queues enabled.
* In case there are no dedicated compute queues, nb_comp_queues must be
* 0 and its queue family index must be set to the graphics queue.
* Queue family index for compute operations and the number of queues
* enabled. Required.
*/
int queue_family_comp_index;
int nb_comp_queues;
/**
* Queue family index for video encode ops, and the amount of queues enabled.
* If the device doesn't support such, queue_family_encode_index will be -1.
* Not required.
*/
int queue_family_encode_index;
int nb_encode_queues;
/**
* Queue family index for video decode ops, and the amount of queues enabled.
* If the device doesn't support such, queue_family_decode_index will be -1.
* Not required.
*/
int queue_family_decode_index;
int nb_decode_queues;
} AVVulkanDeviceContext;
/**
@ -158,7 +170,7 @@ typedef struct AVVulkanFramesContext {
* All frames, imported or allocated, will be created with the
* VK_IMAGE_CREATE_ALIAS_BIT flag set, so the memory may be aliased if needed.
*
* If all three queue family indices in the device context are the same,
* If all queue family indices in the device context are the same,
* images will be created with the EXCLUSIVE sharing mode. Otherwise, all images
* will be created using the CONCURRENT sharing mode.
*