Add YV12 color converter interface for VideoEditor.

The original assumption in VideoEditor is that the decoder output
and encoder input are in YV12 format. However on different
hardware platform the actual formats may be different. So now we
load a platform-specific YV12 color conversion module which
knows the actual format and can convert to/from YV12, which is
the format used in VideoEditor internally for processing.

Bug: 5061733
Change-Id: I852f85efd30c05cf6c42810059ee4d2ef37ee3da

1 files changed, 126 insertions, 0 deletions

diff --git a/libvideoeditor/include/IYV12ColorConverter.h b/libvideoeditor/include/IYV12ColorConverter.h
new file mode 100644
index 0000000..e8f497a
--- /dev/null
+++ b/libvideoeditor/include/IYV12ColorConverter.h
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2011 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 IYV12_COLOR_CONVERTER_H
+
+#define IYV12_COLOR_CONVERTER_H
+
+#include <stdint.h>
+#include <android/rect.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct IYV12ColorConverter {
+
+    /*
+     * getDecoderOutputFormat
+     * Returns the color format (OMX_COLOR_FORMATTYPE) of the decoder output.
+     * If it is YV12 (OMX_COLOR_FormatYUV420Planar), no conversion is needed,
+     * and convertDecoderOutputToYV12() can be a no-op.
+     */
+    int (*getDecoderOutputFormat)();
+
+    /*
+     * convertDecoderOutputToYV12
+     * @Desc     Converts from the decoder output format to YV12 format.
+     * @note     Caller (e.g. VideoEditor) owns the buffers
+     * @param    decoderBits   (IN) Pointer to the buffer contains decoder output
+     * @param    decoderWidth  (IN) Buffer width, as reported by the decoder
+     *                              metadata (kKeyWidth)
+     * @param    decoderHeight (IN) Buffer height, as reported by the decoder
+     *                              metadata (kKeyHeight)
+     * @param    decoderRect   (IN) The rectangle of the actual frame, as
+     *                              reported by decoder metadata (kKeyCropRect)
+     * @param    dstBits      (OUT) Pointer to the output YV12 buffer
+     * @return   -1 Any error
+     * @return   0  No Error
+     */
+    int (*convertDecoderOutputToYV12)(
+        void* decoderBits, int decoderWidth, int decoderHeight,
+        ARect decoderRect, void* dstBits);
+
+    /*
+     * getEncoderIntputFormat
+     * Returns the color format (OMX_COLOR_FORMATTYPE) of the encoder input.
+     * If it is YV12 (OMX_COLOR_FormatYUV420Planar), no conversion is needed,
+     * and convertYV12ToEncoderInput() and getEncoderInputBufferInfo() can
+     * be no-ops.
+     */
+    int (*getEncoderInputFormat)();
+
+    /* convertYV12ToEncoderInput
+     * @Desc     This function converts from YV12 to the encoder input format
+     * @note     Caller (e.g. VideoEditor) owns the buffers
+     * @param    srcBits       (IN) Pointer to the input YV12 buffer
+     * @param    srcWidth      (IN) Width of the YV12 frame
+     * @param    srcHeight     (IN) Height of the YV12 frame
+     * @param    encoderWidth  (IN) Encoder buffer width, as calculated by
+     *                              getEncoderBufferInfo()
+     * @param    encoderHeight (IN) Encoder buffer height, as calculated by
+     *                              getEncoderBufferInfo()
+     * @param    encoderRect   (IN) Rect coordinates of the actual frame inside
+     *                              the encoder buffer, as calculated by
+     *                              getEncoderBufferInfo().
+     * @param    encoderBits  (OUT) Pointer to the output buffer. The size of
+     *                              this buffer is calculated by
+     *                              getEncoderBufferInfo()
+     * @return   -1 Any error
+     * @return   0  No Error
+     */
+    int (*convertYV12ToEncoderInput)(
+        void* srcBits, int srcWidth, int srcHeight,
+        int encoderWidth, int encoderHeight, ARect encoderRect,
+        void* encoderBits);
+
+    /* getEncoderInputBufferInfo
+     * @Desc     This function returns metadata for the encoder input buffer
+     *           based on the actual YV12 frame width and height.
+     * @note     This API should be be used to obtain the necessary information
+     *           before calling convertYV12ToEncoderInput().
+     *           VideoEditor knows only the width and height of the YV12 buffer,
+     *           but it also needs know the width, height, and size of the
+     *           encoder input buffer. The encoder input buffer width and height
+     *           are used to set the metadata for the encoder.
+     * @param    srcWidth      (IN) Width of the YV12 frame
+     * @param    srcHeight     (IN) Height of the YV12 frame
+     * @param    encoderWidth  (OUT) Encoder buffer width needed
+     * @param    encoderHeight (OUT) Encoder buffer height needed
+     * @param    encoderRect   (OUT) Rect coordinates of the actual frame inside
+     *                               the encoder buffer
+     * @param    encoderBufferSize  (OUT) The size of the buffer that need to be
+     *                              allocated by the caller before invoking
+     *                              convertYV12ToEncoderInput().
+     * @return   -1 Any error
+     * @return   0  No Error
+     */
+    int (*getEncoderInputBufferInfo)(
+        int srcWidth, int srcHeight,
+        int* encoderWidth, int* encoderHeight,
+        ARect* encoderRect, int* encoderBufferSize);
+
+} IYV12ColorConverter;
+
+/* The only function that the shared library needs to expose: It fills the
+   function pointers in IYV12ColorConverter */
+void getYV12ColorConverter(IYV12ColorConverter *converter);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif  // IYV12_COLOR_CONVERTER_H