Also documents all options supported by the hwdevice.
This lets users enable all extensions they need without writing their own
instance initialization code.
Patch attached.
>From cf91acc2a907a5ff7af753bf3b2ab495dbc37db0 Mon Sep 17 00:00:00 2001
From: Lynne <d...@lynne.ee>
Date: Sun, 10 May 2020 11:26:40 +0100
Subject: [PATCH 1/2] hwcontext_vulkan: let users enable device and instance
extensions using options
Also documents all options supported by the hwdevice.
This lets users enable all extensions they need without writing their own
instance initialization code.
---
doc/ffmpeg.texi | 15 +++++++++++++++
libavutil/hwcontext_vulkan.c | 31 ++++++++++++++++++++++++++++---
2 files changed, 43 insertions(+), 3 deletions(-)
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index 29753f06ca..d2a30fc868 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -1034,6 +1034,18 @@ If @var{device} is an integer, it selects the device by its index in a
system-dependent list of devices. If @var{device} is any other string, it
selects the first device with a name containing that string as a substring.
+The following options are recognized:
+@table @option
+@item debug
+If set to 1, enables the validation layer, if installed.
+@item linear_images
+If set to 1, images allocated by the hwcontext will be linear and locally mappable.
+@item instance_extensions
+A vertical bar separated list of additional instance extensions to enable.
+@item device_extensions
+A vertical bar separated list of additional device extensions to enable.
+@end table
+
Examples:
@table @emph
@item -init_hw_device vulkan:1
@@ -1041,6 +1053,9 @@ Choose the second device on the system.
@item -init_hw_device vulkan:RADV
Choose the first device with a name containing the string @emph{RADV}.
+
+@item -init_hw_device vulkan:0,instance_extensions=VK_KHR_wayland_surface|VK_KHR_xcb_surface
+Choose the first device and enable the Wayland and XCB instance extensions.
@end table
@end table
diff --git a/libavutil/hwcontext_vulkan.c b/libavutil/hwcontext_vulkan.c
index 43e7cddbc5..a35c1d3a4f 100644
--- a/libavutil/hwcontext_vulkan.c
+++ b/libavutil/hwcontext_vulkan.c
@@ -261,7 +261,7 @@ static VkBool32 vk_dbg_callback(VkDebugUtilsMessageSeverityFlagBitsEXT severity,
return 0;
}
-static int check_extensions(AVHWDeviceContext *ctx, int dev,
+static int check_extensions(AVHWDeviceContext *ctx, int dev, AVDictionary *opts,
const char * const **dst, uint32_t *num, int debug)
{
const char *tstr;
@@ -274,12 +274,14 @@ static int check_extensions(AVHWDeviceContext *ctx, int dev,
int optional_exts_num;
uint32_t sup_ext_count;
VkExtensionProperties *sup_ext;
+ AVDictionaryEntry *user_exts = NULL;
const VulkanOptExtension *optional_exts;
if (!dev) {
mod = "instance";
optional_exts = optional_instance_exts;
optional_exts_num = FF_ARRAY_ELEMS(optional_instance_exts);
+ user_exts = av_dict_get(opts, "instance_extensions", NULL, 0);
vkEnumerateInstanceExtensionProperties(NULL, &sup_ext_count, NULL);
sup_ext = av_malloc_array(sup_ext_count, sizeof(VkExtensionProperties));
if (!sup_ext)
@@ -289,6 +291,7 @@ static int check_extensions(AVHWDeviceContext *ctx, int dev,
mod = "device";
optional_exts = optional_device_exts;
optional_exts_num = FF_ARRAY_ELEMS(optional_device_exts);
+ user_exts = av_dict_get(opts, "device_extensions", NULL, 0);
vkEnumerateDeviceExtensionProperties(hwctx->phys_dev, NULL,
&sup_ext_count, NULL);
sup_ext = av_malloc_array(sup_ext_count, sizeof(VkExtensionProperties));
@@ -345,6 +348,28 @@ static int check_extensions(AVHWDeviceContext *ctx, int dev,
}
}
+ if (user_exts) {
+ char *save, *token = av_strtok(user_exts->value, "|", &save);
+ while (token) {
+ found = 0;
+ for (int j = 0; j < sup_ext_count; j++) {
+ if (!strcmp(token, sup_ext[j].extensionName)) {
+ found = 1;
+ break;
+ }
+ }
+ if (found) {
+ ADD_VAL_TO_LIST(extension_names, extensions_found, token);
+ } else {
+ av_log(ctx, AV_LOG_ERROR, "%s extension \"%s\" not found!\n",
+ mod, token);
+ err = AVERROR(EINVAL);
+ goto end;
+ }
+ token = av_strtok(NULL, "|", &save);
+ }
+ }
+
*dst = extension_names;
*num = extensions_found;
@@ -376,7 +401,7 @@ static int create_instance(AVHWDeviceContext *ctx, AVDictionary *opts)
};
/* Check for present/missing extensions */
- err = check_extensions(ctx, 0, &inst_props.ppEnabledExtensionNames,
+ err = check_extensions(ctx, 0, opts, &inst_props.ppEnabledExtensionNames,
&inst_props.enabledExtensionCount, debug_mode);
if (err < 0)
return err;
@@ -777,7 +802,7 @@ static int vulkan_device_create_internal(AVHWDeviceContext *ctx,
if ((err = search_queue_families(ctx, &dev_info)))
goto end;
- if ((err = check_extensions(ctx, 1, &dev_info.ppEnabledExtensionNames,
+ if ((err = check_extensions(ctx, 1, opts, &dev_info.ppEnabledExtensionNames,
&dev_info.enabledExtensionCount, 0)))
goto end;
--
2.26.2
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