commit b95c1efcaa86f54a6cc67c49f1ac39c92a2c2e9d
author Marissa Wall <marissaw@google.com> Wed Dec 18 14:57:31 2019 -0800
committer Marissa Wall <marissaw@google.com> Fri Dec 20 11:06:09 2019 -0800
tree a0371769e440b7586f122dc970f4c3d6f56d0f1a
parent 85d423a79e6a8c5f8f6214339d837c05d860f1c0

gralloc: add vendor encode/decode helpers

Add helper functions so vendors can encode and decode
basic C++ types without writing their own encode/decode
functions.

Test: Gralloc4_test and libgralloctypes_fuzzer
Bug: 145624669

Change-Id: I91f7a69c76a8ff633fe88f0deb6be6996b789ba0

libs/gralloc/types/include/gralloctypes/Gralloc4.h

diff --git a/libs/gralloc/types/include/gralloctypes/Gralloc4.h b/libs/gralloc/types/include/gralloctypes/Gralloc4.h
index 61c9f1c..ca0d4b5 100644
--- a/libs/gralloc/types/include/gralloctypes/Gralloc4.h
+++ b/libs/gralloc/types/include/gralloctypes/Gralloc4.h
@@ -489,6 +489,58 @@
                             std::optional<std::vector<uint8_t>>* outSmpte2094_40);
 
 /**
+ * The functions below can be used to encode and decode vendor metadata types.
+ */
+status_t encodeUint32(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        uint32_t input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeUint32(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, uint32_t* output);
+
+status_t encodeInt32(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        int32_t input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeInt32(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, int32_t* output);
+
+status_t encodeUint64(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        uint64_t input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeUint64(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, uint64_t* output);
+
+status_t encodeInt64(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        int64_t input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeInt64(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, int64_t* output);
+
+status_t encodeFloat(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        float input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeFloat(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, float* output);
+
+status_t encodeDouble(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        double input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeDouble(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, double* output);
+
+status_t encodeString(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const std::string& input, android::hardware::hidl_vec<uint8_t>* output);
+status_t decodeString(
+        const android::hardware::graphics::mapper::V4_0::IMapper::MetadataType& metadataType,
+        const android::hardware::hidl_vec<uint8_t>& input, std::string* output);
+
+/**
  * The functions below can be used to parse extendable types.
  */
 bool isStandardMetadataType(