V4LCameraAdapter: Adding support for JPEG decoding using libjpeg

Most of the USBCameras support higher resolutions in MJPEG format only.
To decode MJPEG frames, this patch adds support for libjpeg.

Change-Id: Ifef19a16fddcc8bd56894ed67829f76a63e86a97
Signed-off-by: Saravanan Solaiyappan <saravanan.s@ti.com>
Signed-off-by: Andriy Chepurnyy <x0155536@ti.com>
Signed-off-by: Anu Sundararajan <sanuradha@ti.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/camera/inc/Decoder_libjpeg.h b/camera/inc/Decoder_libjpeg.h
new file mode 100755
index 0000000..8d5b649
--- /dev/null
+++ b/camera/inc/Decoder_libjpeg.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_CAMERA_HARDWARE_DECODER_LIBJPEG_H
+#define ANDROID_CAMERA_HARDWARE_DECODER_LIBJPEG_H
+
+#include "CameraHal.h"
+
+extern "C" {
+#include "jhead.h"
+
+#undef TRUE
+#undef FALSE
+
+}
+
+
+namespace Ti {
+namespace Camera {
+
+class Decoder_libjpeg
+{
+
+public:
+    Decoder_libjpeg();
+    ~Decoder_libjpeg();
+    int readDHTSize();
+    int appendDHT(unsigned char *jpeg_src, int filled_len, unsigned char *jpeg_with_dht_buffer, int buff_size);
+    bool decode(unsigned char *jpeg_src, int filled_len, unsigned char *nv12_buffer, int stride);
+
+private:
+    void release();
+    unsigned char **Y_Plane;
+    unsigned char **U_Plane;
+    unsigned char **V_Plane;
+    unsigned char *UV_Plane;
+    unsigned int mWidth, mHeight;
+};
+
+} // namespace Camera
+} // namespace Ti
+
+#endif
+