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+/*
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+/*!\defgroup vp8 VP8
+ * \ingroup codecs
+ * VP8 is vpx's newest video compression algorithm that uses motion
+ * compensated prediction, Discrete Cosine Transform (DCT) coding of the
+ * prediction error signal and context dependent entropy coding techniques
+ * based on arithmetic principles. It features:
+ * - YUV 4:2:0 image format
+ * - Macro-block based coding (16x16 luma plus two 8x8 chroma)
+ * - 1/4 (1/8) pixel accuracy motion compensated prediction
+ * - 4x4 DCT transform
+ * - 128 level linear quantizer
+ * - In loop deblocking filter
+ * - Context-based entropy coding
+ *
+ * @{
+ */
+/*!\file
+ * \brief Provides controls common to both the VP8 encoder and decoder.
+ */
+#ifndef VP8_H
+#define VP8_H
+
+#include "./vpx_codec.h"
+#include "./vpx_image.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*!\brief Control functions
+ *
+ * The set of macros define the control functions of VP8 interface
+ */
+enum vp8_com_control_id {
+ VP8_SET_REFERENCE = 1, /**< pass in an external frame into decoder to be used as reference frame */
+ VP8_COPY_REFERENCE = 2, /**< get a copy of reference frame from the decoder */
+ VP8_SET_POSTPROC = 3, /**< set the decoder's post processing settings */
+ VP8_SET_DBG_COLOR_REF_FRAME = 4, /**< set the reference frames to color for each macroblock */
+ VP8_SET_DBG_COLOR_MB_MODES = 5, /**< set which macro block modes to color */
+ VP8_SET_DBG_COLOR_B_MODES = 6, /**< set which blocks modes to color */
+ VP8_SET_DBG_DISPLAY_MV = 7, /**< set which motion vector modes to draw */
+
+ /* TODO(jkoleszar): The encoder incorrectly reuses some of these values (5+)
+ * for its control ids. These should be migrated to something like the
+ * VP8_DECODER_CTRL_ID_START range next time we're ready to break the ABI.
+ */
+ VP9_GET_REFERENCE = 128, /**< get a pointer to a reference frame */
+ VP8_COMMON_CTRL_ID_MAX,
+ VP8_DECODER_CTRL_ID_START = 256
+};
+
+/*!\brief post process flags
+ *
+ * The set of macros define VP8 decoder post processing flags
+ */
+enum vp8_postproc_level {
+ VP8_NOFILTERING = 0,
+ VP8_DEBLOCK = 1 << 0,
+ VP8_DEMACROBLOCK = 1 << 1,
+ VP8_ADDNOISE = 1 << 2,
+ VP8_DEBUG_TXT_FRAME_INFO = 1 << 3, /**< print frame information */
+ VP8_DEBUG_TXT_MBLK_MODES = 1 << 4, /**< print macro block modes over each macro block */
+ VP8_DEBUG_TXT_DC_DIFF = 1 << 5, /**< print dc diff for each macro block */
+ VP8_DEBUG_TXT_RATE_INFO = 1 << 6, /**< print video rate info (encoder only) */
+ VP8_MFQE = 1 << 10
+};
+
+/*!\brief post process flags
+ *
+ * This define a structure that describe the post processing settings. For
+ * the best objective measure (using the PSNR metric) set post_proc_flag
+ * to VP8_DEBLOCK and deblocking_level to 1.
+ */
+
+typedef struct vp8_postproc_cfg {
+ int post_proc_flag; /**< the types of post processing to be done, should be combination of "vp8_postproc_level" */
+ int deblocking_level; /**< the strength of deblocking, valid range [0, 16] */
+ int noise_level; /**< the strength of additive noise, valid range [0, 16] */
+} vp8_postproc_cfg_t;
+
+/*!\brief reference frame type
+ *
+ * The set of macros define the type of VP8 reference frames
+ */
+typedef enum vpx_ref_frame_type {
+ VP8_LAST_FRAME = 1,
+ VP8_GOLD_FRAME = 2,
+ VP8_ALTR_FRAME = 4
+} vpx_ref_frame_type_t;
+
+/*!\brief reference frame data struct
+ *
+ * Define the data struct to access vp8 reference frames.
+ */
+typedef struct vpx_ref_frame {
+ vpx_ref_frame_type_t frame_type; /**< which reference frame */
+ vpx_image_t img; /**< reference frame data in image format */
+} vpx_ref_frame_t;
+
+/*!\brief VP9 specific reference frame data struct
+ *
+ * Define the data struct to access vp9 reference frames.
+ */
+typedef struct vp9_ref_frame {
+ int idx; /**< frame index to get (input) */
+ vpx_image_t img; /**< img structure to populate (output) */
+} vp9_ref_frame_t;
+
+/*!\brief vp8 decoder control function parameter type
+ *
+ * defines the data type for each of VP8 decoder control function requires
+ */
+VPX_CTRL_USE_TYPE(VP8_SET_REFERENCE, vpx_ref_frame_t *)
+VPX_CTRL_USE_TYPE(VP8_COPY_REFERENCE, vpx_ref_frame_t *)
+VPX_CTRL_USE_TYPE(VP8_SET_POSTPROC, vp8_postproc_cfg_t *)
+VPX_CTRL_USE_TYPE(VP8_SET_DBG_COLOR_REF_FRAME, int)
+VPX_CTRL_USE_TYPE(VP8_SET_DBG_COLOR_MB_MODES, int)
+VPX_CTRL_USE_TYPE(VP8_SET_DBG_COLOR_B_MODES, int)
+VPX_CTRL_USE_TYPE(VP8_SET_DBG_DISPLAY_MV, int)
+VPX_CTRL_USE_TYPE(VP9_GET_REFERENCE, vp9_ref_frame_t *)
+
+/*! @} - end defgroup vp8 */
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif
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