Implement kms vaapi capture

include/kms/kms_shared.h

@@ -0,0 +1,45 @@
+#ifndef GSR_KMS_SHARED_H
+#define GSR_KMS_SHARED_H
+
+#include <stdint.h>
+
+typedef enum {
+    KMS_REQUEST_TYPE_GET_KMS
+} gsr_kms_request_type;
+
+typedef enum {
+    KMS_RESULT_OK,
+    KMS_RESULT_INVALID_REQUEST,
+    KMS_RESULT_FAILED_TO_OPEN_CARD,
+    KMS_RESULT_INSUFFICIENT_PERMISSIONS,
+    KMS_RESULT_FAILED_TO_GET_KMS,
+    KMS_RESULT_NO_KMS_AVAILABLE,
+    KMS_RESULT_FAILED_TO_SEND
+} gsr_kms_result;
+
+typedef struct {
+    int type; /* gsr_kms_request_type */
+    union {
+        char card_path[255];
+    } data;
+} gsr_kms_request;
+
+typedef struct {
+    int fd;
+    uint32_t width;
+    uint32_t height;
+    uint32_t pitch;
+    uint32_t offset;
+    uint32_t pixel_format;
+    uint64_t modifier;
+} gsr_kms_response_fd;
+
+typedef struct {
+    int result; /* gsr_kms_result */
+    union {
+        char err_msg[128];
+        gsr_kms_response_fd fd;
+    } data;
+} gsr_kms_response;
+
+#endif /* #define GSR_KMS_SHARED_H */