avcodec/vulkan_decode: Un-sparse extensions table

Only three of the 226 (== AV_CODEC_ID_AV1) entries
have been used. Unsparsing this table is especially
important given that this array lives in .data.rel.ro.

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/vulkan_av1.c

@@ -24,6 +24,7 @@
 #define MAX_TILES 256
 
 const FFVulkanDecodeDescriptor ff_vk_dec_av1_desc = {
+    .codec_id         = AV_CODEC_ID_AV1,
     .decode_extension = FF_VK_EXT_VIDEO_DECODE_AV1,
     .decode_op        = 0x01000000, /* TODO fix this */
     .ext_props = {

libavcodec/vulkan_decode.c

@@ -20,6 +20,7 @@
 #include "vulkan_video.h"
 #include "vulkan_decode.h"
 #include "config_components.h"
+#include "libavutil/avassert.h"
 #include "libavutil/vulkan_loader.h"
 
 #if CONFIG_H264_VULKAN_HWACCEL
@@ -34,19 +35,23 @@ extern const FFVulkanDecodeDescriptor ff_vk_dec_av1_desc;
 
 static const FFVulkanDecodeDescriptor *dec_descs[] = {
 #if CONFIG_H264_VULKAN_HWACCEL
-    [AV_CODEC_ID_H264] = &ff_vk_dec_h264_desc,
+    &ff_vk_dec_h264_desc,
 #endif
 #if CONFIG_HEVC_VULKAN_HWACCEL
-    [AV_CODEC_ID_HEVC] = &ff_vk_dec_hevc_desc,
+    &ff_vk_dec_hevc_desc,
 #endif
 #if CONFIG_AV1_VULKAN_HWACCEL
-    [AV_CODEC_ID_AV1] = &ff_vk_dec_av1_desc,
+    &ff_vk_dec_av1_desc,
 #endif
 };
 
 static const FFVulkanDecodeDescriptor *get_codecdesc(enum AVCodecID codec_id)
 {
-    return dec_descs[codec_id];
+    for (size_t i = 0; i < FF_ARRAY_ELEMS(dec_descs); i++)
+        if (dec_descs[i]->codec_id == codec_id)
+            return dec_descs[i];
+    av_assert1(!"no codec descriptor");
+    return NULL;
 }
 
 static const VkVideoProfileInfoKHR *get_video_profile(FFVulkanDecodeShared *ctx, enum AVCodecID codec_id)

libavcodec/vulkan_decode.h

@@ -19,6 +19,7 @@
 #ifndef AVCODEC_VULKAN_DECODE_H
 #define AVCODEC_VULKAN_DECODE_H
 
+#include "codec_id.h"
 #include "decode.h"
 #include "hwaccel_internal.h"
 #include "internal.h"
@@ -26,6 +27,7 @@
 #include "vulkan_video.h"
 
 typedef struct FFVulkanDecodeDescriptor {
+    enum AVCodecID                   codec_id;
     FFVulkanExtensions               decode_extension;
     VkVideoCodecOperationFlagBitsKHR decode_op;
 

libavcodec/vulkan_h264.c

@@ -22,6 +22,7 @@
 #include "vulkan_decode.h"
 
 const FFVulkanDecodeDescriptor ff_vk_dec_h264_desc = {
+    .codec_id         = AV_CODEC_ID_H264,
     .decode_extension = FF_VK_EXT_VIDEO_DECODE_H264,
     .decode_op        = VK_VIDEO_CODEC_OPERATION_DECODE_H264_BIT_KHR,
     .ext_props = {

libavcodec/vulkan_hevc.c

@@ -23,6 +23,7 @@
 #include "vulkan_decode.h"
 
 const FFVulkanDecodeDescriptor ff_vk_dec_hevc_desc = {
+    .codec_id         = AV_CODEC_ID_HEVC,
     .decode_extension = FF_VK_EXT_VIDEO_DECODE_H265,
     .decode_op        = VK_VIDEO_CODEC_OPERATION_DECODE_H265_BIT_KHR,
     .ext_props = {