Add support for rocJpegDecodeBatched API - part 1 of 2 (#31)

* Add initial support for batch decoding

* Add support for reading and parsing the images in batches and allocating the output buffers

* Add initial support for the rocJpegDecodeBatched API

* use recursive_mutex to allow DecodeBatched and Decode functions called concurrently

* code cleanup

* Add a CTEST for jpegdecodebatched

* modify the help message

* code clean up

[ROCm/rocjpeg commit: c660aeab43]

projects/rocjpeg/test/CMakeLists.txt

@@ -120,4 +120,16 @@ add_test(
             --build-generator "${CMAKE_GENERATOR}"
             --test-command "jpegdecodemultithreads"
             -i ${ROCM_PATH}/share/rocjpeg/images/ -t 2
+)
+
+add_test(
+  NAME
+    jpeg-decode-batch-fmt-native
+  COMMAND
+    "${CMAKE_CTEST_COMMAND}"
+            --build-and-test "${ROCM_PATH}/share/rocjpeg/samples/jpegDecodeBatched"
+                              "${CMAKE_CURRENT_BINARY_DIR}/jpegDecodeBatched"
+            --build-generator "${CMAKE_GENERATOR}"
+            --test-command "jpegdecodebatched"
+            -i ${ROCM_PATH}/share/rocjpeg/images/
 )