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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_decoder WebM VP8/VP9 Decoder
+ * \ingroup vp8
+ *
+ * @{
+ */
+/*!\file
+ * \brief Provides definitions for using VP8 or VP9 within the vpx Decoder
+ *        interface.
+ */
+#ifndef VPX_VPX_VP8DX_H_
+#define VPX_VPX_VP8DX_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Include controls common to both the encoder and decoder */
+#include "./vp8.h"
+
+/*!\name Algorithm interface for VP8
+ *
+ * This interface provides the capability to decode VP8 streams.
+ * @{
+ */
+
+/*!\brief A single instance of the VP8 decoder.
+ *\deprecated This access mechanism is provided for backwards compatibility;
+ * prefer vpx_codec_vp8_dx().
+ */
+extern vpx_codec_iface_t vpx_codec_vp8_dx_algo;
+
+/*!\brief The interface to the VP8 decoder.
+ */
+extern vpx_codec_iface_t *vpx_codec_vp8_dx(void);
+/*!@} - end algorithm interface member group*/
+
+/*!\name Algorithm interface for VP9
+ *
+ * This interface provides the capability to decode VP9 streams.
+ * @{
+ */
+
+/*!\brief A single instance of the VP9 decoder.
+ *\deprecated This access mechanism is provided for backwards compatibility;
+ * prefer vpx_codec_vp9_dx().
+ */
+extern vpx_codec_iface_t vpx_codec_vp9_dx_algo;
+
+/*!\brief The interface to the VP9 decoder.
+ */
+extern vpx_codec_iface_t *vpx_codec_vp9_dx(void);
+/*!@} - end algorithm interface member group*/
+
+/*!\enum vp8_dec_control_id
+ * \brief VP8 decoder control functions
+ *
+ * This set of macros define the control functions available for the VP8
+ * decoder interface.
+ *
+ * \sa #vpx_codec_control
+ */
+enum vp8_dec_control_id {
+  /** control function to get info on which reference frames were updated
+   *  by the last decode
+   */
+  VP8D_GET_LAST_REF_UPDATES = VP8_DECODER_CTRL_ID_START,
+
+  /** check if the indicated frame is corrupted */
+  VP8D_GET_FRAME_CORRUPTED,
+
+  /** control function to get info on which reference frames were used
+   *  by the last decode
+   */
+  VP8D_GET_LAST_REF_USED,
+
+  /** decryption function to decrypt encoded buffer data immediately
+   * before decoding. Takes a vpx_decrypt_init, which contains
+   * a callback function and opaque context pointer.
+   */
+  VPXD_SET_DECRYPTOR,
+  VP8D_SET_DECRYPTOR = VPXD_SET_DECRYPTOR,
+
+  /** control function to get the dimensions that the current frame is decoded
+   * at. This may be different to the intended display size for the frame as
+   * specified in the wrapper or frame header (see VP9D_GET_DISPLAY_SIZE). */
+  VP9D_GET_FRAME_SIZE,
+
+  /** control function to get the current frame's intended display dimensions
+   * (as specified in the wrapper or frame header). This may be different to
+   * the decoded dimensions of this frame (see VP9D_GET_FRAME_SIZE). */
+  VP9D_GET_DISPLAY_SIZE,
+
+  /** control function to get the bit depth of the stream. */
+  VP9D_GET_BIT_DEPTH,
+
+  /** control function to set the byte alignment of the planes in the reference
+   * buffers. Valid values are power of 2, from 32 to 1024. A value of 0 sets
+   * legacy alignment. I.e. Y plane is aligned to 32 bytes, U plane directly
+   * follows Y plane, and V plane directly follows U plane. Default value is 0.
+   */
+  VP9_SET_BYTE_ALIGNMENT,
+
+  /** control function to invert the decoding order to from right to left. The
+   * function is used in a test to confirm the decoding independence of tile
+   * columns. The function may be used in application where this order
+   * of decoding is desired.
+   *
+   * TODO(yaowu): Rework the unit test that uses this control, and in a future
+   *              release, this test-only control shall be removed.
+   */
+  VP9_INVERT_TILE_DECODE_ORDER,
+
+  /** control function to set the skip loop filter flag. Valid values are
+   * integers. The decoder will skip the loop filter when its value is set to
+   * nonzero. If the loop filter is skipped the decoder may accumulate decode
+   * artifacts. The default value is 0.
+   */
+  VP9_SET_SKIP_LOOP_FILTER,
+
+  /** control function to decode SVC stream up to the x spatial layers,
+   * where x is passed in through the control, and is 0 for base layer.
+   */
+  VP9_DECODE_SVC_SPATIAL_LAYER,
+
+  /*!\brief Codec control function to get last decoded frame quantizer.
+   *
+   * Return value uses internal quantizer scale defined by the codec.
+   *
+   * Supported in codecs: VP8, VP9
+   */
+  VPXD_GET_LAST_QUANTIZER,
+
+  /*!\brief Codec control function to set row level multi-threading.
+   *
+   * 0 : off, 1 : on
+   *
+   * Supported in codecs: VP9
+   */
+  VP9D_SET_ROW_MT,
+
+  /*!\brief Codec control function to set loopfilter optimization.
+   *
+   * 0 : off, Loop filter is done after all tiles have been decoded
+   * 1 : on, Loop filter is done immediately after decode without
+   *     waiting for all threads to sync.
+   *
+   * Supported in codecs: VP9
+   */
+  VP9D_SET_LOOP_FILTER_OPT,
+
+  VP8_DECODER_CTRL_ID_MAX
+};
+
+/** Decrypt n bytes of data from input -> output, using the decrypt_state
+ *  passed in VPXD_SET_DECRYPTOR.
+ */
+typedef void (*vpx_decrypt_cb)(void *decrypt_state, const unsigned char *input,
+                               unsigned char *output, int count);
+
+/*!\brief Structure to hold decryption state
+ *
+ * Defines a structure to hold the decryption state and access function.
+ */
+typedef struct vpx_decrypt_init {
+  /*! Decrypt callback. */
+  vpx_decrypt_cb decrypt_cb;
+
+  /*! Decryption state. */
+  void *decrypt_state;
+} vpx_decrypt_init;
+
+/*!\cond */
+/*!\brief VP8 decoder control function parameter type
+ *
+ * Defines the data types that VP8D control functions take. Note that
+ * additional common controls are defined in vp8.h
+ *
+ */
+
+VPX_CTRL_USE_TYPE(VP8D_GET_LAST_REF_UPDATES, int *)
+#define VPX_CTRL_VP8D_GET_LAST_REF_UPDATES
+VPX_CTRL_USE_TYPE(VP8D_GET_FRAME_CORRUPTED, int *)
+#define VPX_CTRL_VP8D_GET_FRAME_CORRUPTED
+VPX_CTRL_USE_TYPE(VP8D_GET_LAST_REF_USED, int *)
+#define VPX_CTRL_VP8D_GET_LAST_REF_USED
+VPX_CTRL_USE_TYPE(VPXD_SET_DECRYPTOR, vpx_decrypt_init *)
+#define VPX_CTRL_VPXD_SET_DECRYPTOR
+VPX_CTRL_USE_TYPE(VP8D_SET_DECRYPTOR, vpx_decrypt_init *)
+#define VPX_CTRL_VP8D_SET_DECRYPTOR
+VPX_CTRL_USE_TYPE(VP9D_GET_FRAME_SIZE, int *)
+#define VPX_CTRL_VP9D_GET_FRAME_SIZE
+VPX_CTRL_USE_TYPE(VP9D_GET_DISPLAY_SIZE, int *)
+#define VPX_CTRL_VP9D_GET_DISPLAY_SIZE
+VPX_CTRL_USE_TYPE(VP9D_GET_BIT_DEPTH, unsigned int *)
+#define VPX_CTRL_VP9D_GET_BIT_DEPTH
+VPX_CTRL_USE_TYPE(VP9_SET_BYTE_ALIGNMENT, int)
+#define VPX_CTRL_VP9_SET_BYTE_ALIGNMENT
+VPX_CTRL_USE_TYPE(VP9_INVERT_TILE_DECODE_ORDER, int)
+#define VPX_CTRL_VP9_INVERT_TILE_DECODE_ORDER
+VPX_CTRL_USE_TYPE(VP9_SET_SKIP_LOOP_FILTER, int)
+#define VPX_CTRL_VP9_SET_SKIP_LOOP_FILTER
+VPX_CTRL_USE_TYPE(VP9_DECODE_SVC_SPATIAL_LAYER, int)
+#define VPX_CTRL_VP9_DECODE_SVC_SPATIAL_LAYER
+VPX_CTRL_USE_TYPE(VPXD_GET_LAST_QUANTIZER, int *)
+#define VPX_CTRL_VPXD_GET_LAST_QUANTIZER
+VPX_CTRL_USE_TYPE(VP9D_SET_ROW_MT, int)
+#define VPX_CTRL_VP9_DECODE_SET_ROW_MT
+VPX_CTRL_USE_TYPE(VP9D_SET_LOOP_FILTER_OPT, int)
+#define VPX_CTRL_VP9_SET_LOOP_FILTER_OPT
+
+/*!\endcond */
+/*! @} - end defgroup vp8_decoder */
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VPX_VPX_VP8DX_H_