libvpx: Add VP9 decoder.

source/libvpx/vpx/vpx_decoder.h

Index: source/libvpx/vpx/vpx_decoder.h
===================================================================
--- source/libvpx/vpx/vpx_decoder.h	(revision 172621)
+++ source/libvpx/vpx/vpx_decoder.h	(working copy)
@@ -32,299 +32,297 @@
 #define VPX_DECODER_H
 #include "vpx_codec.h"
 
-    /*!\brief Current ABI version number
-     *
-     * \internal
-     * If this file is altered in any way that changes the ABI, this value
-     * must be bumped.  Examples include, but are not limited to, changing
-     * types, removing or reassigning enums, adding/removing/rearranging
-     * fields to structures
-     */
+  /*!\brief Current ABI version number
+   *
+   * \internal
+   * If this file is altered in any way that changes the ABI, this value
+   * must be bumped.  Examples include, but are not limited to, changing
+   * types, removing or reassigning enums, adding/removing/rearranging
+   * fields to structures
+   */
 #define VPX_DECODER_ABI_VERSION (2 + VPX_CODEC_ABI_VERSION) /**<\hideinitializer*/
 
-    /*! \brief Decoder capabilities bitfield
-     *
-     *  Each decoder advertises the capabilities it supports as part of its
-     *  ::vpx_codec_iface_t interface structure. Capabilities are extra interfaces
-     *  or functionality, and are not required to be supported by a decoder.
-     *
-     *  The available flags are specified by VPX_CODEC_CAP_* defines.
-     */
+  /*! \brief Decoder capabilities bitfield
+   *
+   *  Each decoder advertises the capabilities it supports as part of its
+   *  ::vpx_codec_iface_t interface structure. Capabilities are extra interfaces
+   *  or functionality, and are not required to be supported by a decoder.
+   *
+   *  The available flags are specified by VPX_CODEC_CAP_* defines.
+   */
 #define VPX_CODEC_CAP_PUT_SLICE  0x10000 /**< Will issue put_slice callbacks */
 #define VPX_CODEC_CAP_PUT_FRAME  0x20000 /**< Will issue put_frame callbacks */
 #define VPX_CODEC_CAP_POSTPROC   0x40000 /**< Can postprocess decoded frame */
 #define VPX_CODEC_CAP_ERROR_CONCEALMENT   0x80000 /**< Can conceal errors due to
-                                                       packet loss */
+  packet loss */
 #define VPX_CODEC_CAP_INPUT_FRAGMENTS   0x100000 /**< Can receive encoded frames
-                                                    one fragment at a time */
+  one fragment at a time */
 
-    /*! \brief Initialization-time Feature Enabling
-     *
-     *  Certain codec features must be known at initialization time, to allow for
-     *  proper memory allocation.
-     *
-     *  The available flags are specified by VPX_CODEC_USE_* defines.
-     */
+  /*! \brief Initialization-time Feature Enabling
+   *
+   *  Certain codec features must be known at initialization time, to allow for
+   *  proper memory allocation.
+   *
+   *  The available flags are specified by VPX_CODEC_USE_* defines.
+   */
 #define VPX_CODEC_USE_POSTPROC   0x10000 /**< Postprocess decoded frame */
 #define VPX_CODEC_USE_ERROR_CONCEALMENT 0x20000 /**< Conceal errors in decoded
-                                                     frames */
+  frames */
 #define VPX_CODEC_USE_INPUT_FRAGMENTS   0x40000 /**< The input frame should be
-                                                    passed to the decoder one
-                                                    fragment at a time */
+  passed to the decoder one
+  fragment at a time */
 
-    /*!\brief Stream properties
-     *
-     * This structure is used to query or set properties of the decoded
-     * stream. Algorithms may extend this structure with data specific
-     * to their bitstream by setting the sz member appropriately.
-     */
-    typedef struct vpx_codec_stream_info
-    {
-        unsigned int sz;     /**< Size of this structure */
-        unsigned int w;      /**< Width (or 0 for unknown/default) */
-        unsigned int h;      /**< Height (or 0 for unknown/default) */
-        unsigned int is_kf;  /**< Current frame is a keyframe */
-    } vpx_codec_stream_info_t;
+  /*!\brief Stream properties
+   *
+   * This structure is used to query or set properties of the decoded
+   * stream. Algorithms may extend this structure with data specific
+   * to their bitstream by setting the sz member appropriately.
+   */
+  typedef struct vpx_codec_stream_info {
+    unsigned int sz;     /**< Size of this structure */
+    unsigned int w;      /**< Width (or 0 for unknown/default) */
+    unsigned int h;      /**< Height (or 0 for unknown/default) */
+    unsigned int is_kf;  /**< Current frame is a keyframe */
+  } vpx_codec_stream_info_t;
 
-    /* REQUIRED FUNCTIONS
-     *
-     * The following functions are required to be implemented for all decoders.
-     * They represent the base case functionality expected of all decoders.
-     */
+  /* REQUIRED FUNCTIONS
+   *
+   * The following functions are required to be implemented for all decoders.
+   * They represent the base case functionality expected of all decoders.
+   */
 
 
-    /*!\brief Initialization Configurations
-     *
-     * This structure is used to pass init time configuration options to the
-     * decoder.
-     */
-    typedef struct vpx_codec_dec_cfg
-    {
-        unsigned int threads; /**< Maximum number of threads to use, default 1 */
-        unsigned int w;      /**< Width */
-        unsigned int h;      /**< Height */
-    } vpx_codec_dec_cfg_t; /**< alias for struct vpx_codec_dec_cfg */
+  /*!\brief Initialization Configurations
+   *
+   * This structure is used to pass init time configuration options to the
+   * decoder.
+   */
+  typedef struct vpx_codec_dec_cfg {
+    unsigned int threads; /**< Maximum number of threads to use, default 1 */
+    unsigned int w;      /**< Width */
+    unsigned int h;      /**< Height */
+  } vpx_codec_dec_cfg_t; /**< alias for struct vpx_codec_dec_cfg */
 
 
-    /*!\brief Initialize a decoder instance
-     *
-     * Initializes a decoder context using the given interface. Applications
-     * should call the vpx_codec_dec_init convenience macro instead of this
-     * function directly, to ensure that the ABI version number parameter
-     * is properly initialized.
-     *
-     * If the library was configured with --disable-multithread, this call
-     * is not thread safe and should be guarded with a lock if being used
-     * in a multithreaded context.
-     *
-     * In XMA mode (activated by setting VPX_CODEC_USE_XMA in the flags
-     * parameter), the storage pointed to by the cfg parameter must be
-     * kept readable and stable until all memory maps have been set.
-     *
-     * \param[in]    ctx     Pointer to this instance's context.
-     * \param[in]    iface   Pointer to the algorithm interface to use.
-     * \param[in]    cfg     Configuration to use, if known. May be NULL.
-     * \param[in]    flags   Bitfield of VPX_CODEC_USE_* flags
-     * \param[in]    ver     ABI version number. Must be set to
-     *                       VPX_DECODER_ABI_VERSION
-     * \retval #VPX_CODEC_OK
-     *     The decoder algorithm initialized.
-     * \retval #VPX_CODEC_MEM_ERROR
-     *     Memory allocation failed.
-     */
-    vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t      *ctx,
-                                           vpx_codec_iface_t    *iface,
-                                           vpx_codec_dec_cfg_t  *cfg,
-                                           vpx_codec_flags_t     flags,
-                                           int                   ver);
+  /*!\brief Initialize a decoder instance
+   *
+   * Initializes a decoder context using the given interface. Applications
+   * should call the vpx_codec_dec_init convenience macro instead of this
+   * function directly, to ensure that the ABI version number parameter
+   * is properly initialized.
+   *
+   * If the library was configured with --disable-multithread, this call
+   * is not thread safe and should be guarded with a lock if being used
+   * in a multithreaded context.
+   *
+   * In XMA mode (activated by setting VPX_CODEC_USE_XMA in the flags
+   * parameter), the storage pointed to by the cfg parameter must be
+   * kept readable and stable until all memory maps have been set.
+   *
+   * \param[in]    ctx     Pointer to this instance's context.
+   * \param[in]    iface   Pointer to the algorithm interface to use.
+   * \param[in]    cfg     Configuration to use, if known. May be NULL.
+   * \param[in]    flags   Bitfield of VPX_CODEC_USE_* flags
+   * \param[in]    ver     ABI version number. Must be set to
+   *                       VPX_DECODER_ABI_VERSION
+   * \retval #VPX_CODEC_OK
+   *     The decoder algorithm initialized.
+   * \retval #VPX_CODEC_MEM_ERROR
+   *     Memory allocation failed.
+   */
+  vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t      *ctx,
+                                         vpx_codec_iface_t    *iface,
+                                         vpx_codec_dec_cfg_t  *cfg,
+                                         vpx_codec_flags_t     flags,
+                                         int                   ver);
 
-    /*!\brief Convenience macro for vpx_codec_dec_init_ver()
-     *
-     * Ensures the ABI version parameter is properly set.
-     */
+  /*!\brief Convenience macro for vpx_codec_dec_init_ver()
+   *
+   * Ensures the ABI version parameter is properly set.
+   */
 #define vpx_codec_dec_init(ctx, iface, cfg, flags) \
-    vpx_codec_dec_init_ver(ctx, iface, cfg, flags, VPX_DECODER_ABI_VERSION)
+  vpx_codec_dec_init_ver(ctx, iface, cfg, flags, VPX_DECODER_ABI_VERSION)
 
 
-    /*!\brief Parse stream info from a buffer
-     *
-     * Performs high level parsing of the bitstream. Construction of a decoder
-     * context is not necessary. Can be used to determine if the bitstream is
-     * of the proper format, and to extract information from the stream.
-     *
-     * \param[in]      iface   Pointer to the algorithm interface
-     * \param[in]      data    Pointer to a block of data to parse
-     * \param[in]      data_sz Size of the data buffer
-     * \param[in,out]  si      Pointer to stream info to update. The size member
-     *                         \ref MUST be properly initialized, but \ref MAY be
-     *                         clobbered by the algorithm. This parameter \ref MAY
-     *                         be NULL.
-     *
-     * \retval #VPX_CODEC_OK
-     *     Bitstream is parsable and stream information updated
-     */
-    vpx_codec_err_t vpx_codec_peek_stream_info(vpx_codec_iface_t       *iface,
-            const uint8_t           *data,
-            unsigned int             data_sz,
-            vpx_codec_stream_info_t *si);
+  /*!\brief Parse stream info from a buffer
+   *
+   * Performs high level parsing of the bitstream. Construction of a decoder
+   * context is not necessary. Can be used to determine if the bitstream is
+   * of the proper format, and to extract information from the stream.
+   *
+   * \param[in]      iface   Pointer to the algorithm interface
+   * \param[in]      data    Pointer to a block of data to parse
+   * \param[in]      data_sz Size of the data buffer
+   * \param[in,out]  si      Pointer to stream info to update. The size member
+   *                         \ref MUST be properly initialized, but \ref MAY be
+   *                         clobbered by the algorithm. This parameter \ref MAY
+   *                         be NULL.
+   *
+   * \retval #VPX_CODEC_OK
+   *     Bitstream is parsable and stream information updated
+   */
+  vpx_codec_err_t vpx_codec_peek_stream_info(vpx_codec_iface_t       *iface,
+                                             const uint8_t           *data,
+                                             unsigned int             data_sz,
+                                             vpx_codec_stream_info_t *si);
 
 
-    /*!\brief Return information about the current stream.
-     *
-     * Returns information about the stream that has been parsed during decoding.
-     *
-     * \param[in]      ctx     Pointer to this instance's context
-     * \param[in,out]  si      Pointer to stream info to update. The size member
-     *                         \ref MUST be properly initialized, but \ref MAY be
-     *                         clobbered by the algorithm. This parameter \ref MAY
-     *                         be NULL.
-     *
-     * \retval #VPX_CODEC_OK
-     *     Bitstream is parsable and stream information updated
-     */
-    vpx_codec_err_t vpx_codec_get_stream_info(vpx_codec_ctx_t         *ctx,
-            vpx_codec_stream_info_t *si);
+  /*!\brief Return information about the current stream.
+   *
+   * Returns information about the stream that has been parsed during decoding.
+   *
+   * \param[in]      ctx     Pointer to this instance's context
+   * \param[in,out]  si      Pointer to stream info to update. The size member
+   *                         \ref MUST be properly initialized, but \ref MAY be
+   *                         clobbered by the algorithm. This parameter \ref MAY
+   *                         be NULL.
+   *
+   * \retval #VPX_CODEC_OK
+   *     Bitstream is parsable and stream information updated
+   */
+  vpx_codec_err_t vpx_codec_get_stream_info(vpx_codec_ctx_t         *ctx,
+                                            vpx_codec_stream_info_t *si);
 
 
-    /*!\brief Decode data
-     *
-     * Processes a buffer of coded data. If the processing results in a new
-     * decoded frame becoming available, PUT_SLICE and PUT_FRAME events may be
-     * generated, as appropriate. Encoded data \ref MUST be passed in DTS (decode
-     * time stamp) order. Frames produced will always be in PTS (presentation
-     * time stamp) order.
-     * If the decoder is configured with VPX_CODEC_USE_INPUT_FRAGMENTS enabled,
-     * data and data_sz can contain a fragment of the encoded frame. Fragment
-     * \#n must contain at least partition \#n, but can also contain subsequent
-     * partitions (\#n+1 - \#n+i), and if so, fragments \#n+1, .., \#n+i must
-     * be empty. When no more data is available, this function should be called
-     * with NULL as data and 0 as data_sz. The memory passed to this function
-     * must be available until the frame has been decoded.
-     *
-     * \param[in] ctx          Pointer to this instance's context
-     * \param[in] data         Pointer to this block of new coded data. If
-     *                         NULL, a VPX_CODEC_CB_PUT_FRAME event is posted
-     *                         for the previously decoded frame.
-     * \param[in] data_sz      Size of the coded data, in bytes.
-     * \param[in] user_priv    Application specific data to associate with
-     *                         this frame.
-     * \param[in] deadline     Soft deadline the decoder should attempt to meet,
-     *                         in us. Set to zero for unlimited.
-     *
-     * \return Returns #VPX_CODEC_OK if the coded data was processed completely
-     *         and future pictures can be decoded without error. Otherwise,
-     *         see the descriptions of the other error codes in ::vpx_codec_err_t
-     *         for recoverability capabilities.
-     */
-    vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t    *ctx,
-                                     const uint8_t        *data,
-                                     unsigned int            data_sz,
-                                     void               *user_priv,
-                                     long                deadline);
+  /*!\brief Decode data
+   *
+   * Processes a buffer of coded data. If the processing results in a new
+   * decoded frame becoming available, PUT_SLICE and PUT_FRAME events may be
+   * generated, as appropriate. Encoded data \ref MUST be passed in DTS (decode
+   * time stamp) order. Frames produced will always be in PTS (presentation
+   * time stamp) order.
+   * If the decoder is configured with VPX_CODEC_USE_INPUT_FRAGMENTS enabled,
+   * data and data_sz can contain a fragment of the encoded frame. Fragment
+   * \#n must contain at least partition \#n, but can also contain subsequent
+   * partitions (\#n+1 - \#n+i), and if so, fragments \#n+1, .., \#n+i must
+   * be empty. When no more data is available, this function should be called
+   * with NULL as data and 0 as data_sz. The memory passed to this function
+   * must be available until the frame has been decoded.
+   *
+   * \param[in] ctx          Pointer to this instance's context
+   * \param[in] data         Pointer to this block of new coded data. If
+   *                         NULL, a VPX_CODEC_CB_PUT_FRAME event is posted
+   *                         for the previously decoded frame.
+   * \param[in] data_sz      Size of the coded data, in bytes.
+   * \param[in] user_priv    Application specific data to associate with
+   *                         this frame.
+   * \param[in] deadline     Soft deadline the decoder should attempt to meet,
+   *                         in us. Set to zero for unlimited.
+   *
+   * \return Returns #VPX_CODEC_OK if the coded data was processed completely
+   *         and future pictures can be decoded without error. Otherwise,
+   *         see the descriptions of the other error codes in ::vpx_codec_err_t
+   *         for recoverability capabilities.
+   */
+  vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t    *ctx,
+                                   const uint8_t        *data,
+                                   unsigned int            data_sz,
+                                   void               *user_priv,
+                                   long                deadline);
 
 
-    /*!\brief Decoded frames iterator
-     *
-     * Iterates over a list of the frames available for display. The iterator
-     * storage should be initialized to NULL to start the iteration. Iteration is
-     * complete when this function returns NULL.
-     *
-     * The list of available frames becomes valid upon completion of the
-     * vpx_codec_decode call, and remains valid until the next call to vpx_codec_decode.
-     *
-     * \param[in]     ctx      Pointer to this instance's context
-     * \param[in,out] iter     Iterator storage, initialized to NULL
-     *
-     * \return Returns a pointer to an image, if one is ready for display. Frames
-     *         produced will always be in PTS (presentation time stamp) order.
-     */
-    vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t  *ctx,
-                                     vpx_codec_iter_t *iter);
+  /*!\brief Decoded frames iterator
+   *
+   * Iterates over a list of the frames available for display. The iterator
+   * storage should be initialized to NULL to start the iteration. Iteration is
+   * complete when this function returns NULL.
+   *
+   * The list of available frames becomes valid upon completion of the
+   * vpx_codec_decode call, and remains valid until the next call to vpx_codec_decode.
+   *
+   * \param[in]     ctx      Pointer to this instance's context
+   * \param[in,out] iter     Iterator storage, initialized to NULL
+   *
+   * \return Returns a pointer to an image, if one is ready for display. Frames
+   *         produced will always be in PTS (presentation time stamp) order.
+   */
+  vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t  *ctx,
+                                   vpx_codec_iter_t *iter);
 
 
-    /*!\defgroup cap_put_frame Frame-Based Decoding Functions
-     *
-     * The following functions are required to be implemented for all decoders
-     * that advertise the VPX_CODEC_CAP_PUT_FRAME capability. Calling these functions
-     * for codecs that don't advertise this capability will result in an error
-     * code being returned, usually VPX_CODEC_ERROR
-     * @{
-     */
+  /*!\defgroup cap_put_frame Frame-Based Decoding Functions
+   *
+   * The following functions are required to be implemented for all decoders
+   * that advertise the VPX_CODEC_CAP_PUT_FRAME capability. Calling these functions
+   * for codecs that don't advertise this capability will result in an error
+   * code being returned, usually VPX_CODEC_ERROR
+   * @{
+   */
 
-    /*!\brief put frame callback prototype
-     *
-     * This callback is invoked by the decoder to notify the application of
-     * the availability of decoded image data.
-     */
-    typedef void (*vpx_codec_put_frame_cb_fn_t)(void        *user_priv,
-            const vpx_image_t *img);
+  /*!\brief put frame callback prototype
+   *
+   * This callback is invoked by the decoder to notify the application of
+   * the availability of decoded image data.
+   */
+  typedef void (*vpx_codec_put_frame_cb_fn_t)(void        *user_priv,
+                                              const vpx_image_t *img);
 
 
-    /*!\brief Register for notification of frame completion.
-     *
-     * Registers a given function to be called when a decoded frame is
-     * available.
-     *
-     * \param[in] ctx          Pointer to this instance's context
-     * \param[in] cb           Pointer to the callback function
-     * \param[in] user_priv    User's private data
-     *
-     * \retval #VPX_CODEC_OK
-     *     Callback successfully registered.
-     * \retval #VPX_CODEC_ERROR
-     *     Decoder context not initialized, or algorithm not capable of
-     *     posting slice completion.
-     */
-    vpx_codec_err_t vpx_codec_register_put_frame_cb(vpx_codec_ctx_t             *ctx,
-            vpx_codec_put_frame_cb_fn_t  cb,
-            void                        *user_priv);
+  /*!\brief Register for notification of frame completion.
+   *
+   * Registers a given function to be called when a decoded frame is
+   * available.
+   *
+   * \param[in] ctx          Pointer to this instance's context
+   * \param[in] cb           Pointer to the callback function
+   * \param[in] user_priv    User's private data
+   *
+   * \retval #VPX_CODEC_OK
+   *     Callback successfully registered.
+   * \retval #VPX_CODEC_ERROR
+   *     Decoder context not initialized, or algorithm not capable of
+   *     posting slice completion.
+   */
+  vpx_codec_err_t vpx_codec_register_put_frame_cb(vpx_codec_ctx_t             *ctx,
+                                                  vpx_codec_put_frame_cb_fn_t  cb,
+                                                  void                        *user_priv);
 
 
-    /*!@} - end defgroup cap_put_frame */
+  /*!@} - end defgroup cap_put_frame */
 
-    /*!\defgroup cap_put_slice Slice-Based Decoding Functions
-     *
-     * The following functions are required to be implemented for all decoders
-     * that advertise the VPX_CODEC_CAP_PUT_SLICE capability. Calling these functions
-     * for codecs that don't advertise this capability will result in an error
-     * code being returned, usually VPX_CODEC_ERROR
-     * @{
-     */
+  /*!\defgroup cap_put_slice Slice-Based Decoding Functions
+   *
+   * The following functions are required to be implemented for all decoders
+   * that advertise the VPX_CODEC_CAP_PUT_SLICE capability. Calling these functions
+   * for codecs that don't advertise this capability will result in an error
+   * code being returned, usually VPX_CODEC_ERROR
+   * @{
+   */
 
-    /*!\brief put slice callback prototype
-     *
-     * This callback is invoked by the decoder to notify the application of
-     * the availability of partially decoded image data. The
-     */
-    typedef void (*vpx_codec_put_slice_cb_fn_t)(void         *user_priv,
-            const vpx_image_t      *img,
-            const vpx_image_rect_t *valid,
-            const vpx_image_rect_t *update);
+  /*!\brief put slice callback prototype
+   *
+   * This callback is invoked by the decoder to notify the application of
+   * the availability of partially decoded image data. The
+   */
+  typedef void (*vpx_codec_put_slice_cb_fn_t)(void         *user_priv,
+                                              const vpx_image_t      *img,
+                                              const vpx_image_rect_t *valid,
+                                              const vpx_image_rect_t *update);
 
 
-    /*!\brief Register for notification of slice completion.
-     *
-     * Registers a given function to be called when a decoded slice is
-     * available.
-     *
-     * \param[in] ctx          Pointer to this instance's context
-     * \param[in] cb           Pointer to the callback function
-     * \param[in] user_priv    User's private data
-     *
-     * \retval #VPX_CODEC_OK
-     *     Callback successfully registered.
-     * \retval #VPX_CODEC_ERROR
-     *     Decoder context not initialized, or algorithm not capable of
-     *     posting slice completion.
-     */
-    vpx_codec_err_t vpx_codec_register_put_slice_cb(vpx_codec_ctx_t             *ctx,
-            vpx_codec_put_slice_cb_fn_t  cb,
-            void                        *user_priv);
+  /*!\brief Register for notification of slice completion.
+   *
+   * Registers a given function to be called when a decoded slice is
+   * available.
+   *
+   * \param[in] ctx          Pointer to this instance's context
+   * \param[in] cb           Pointer to the callback function
+   * \param[in] user_priv    User's private data
+   *
+   * \retval #VPX_CODEC_OK
+   *     Callback successfully registered.
+   * \retval #VPX_CODEC_ERROR
+   *     Decoder context not initialized, or algorithm not capable of
+   *     posting slice completion.
+   */
+  vpx_codec_err_t vpx_codec_register_put_slice_cb(vpx_codec_ctx_t             *ctx,
+                                                  vpx_codec_put_slice_cb_fn_t  cb,
+                                                  void                        *user_priv);
 
 
-    /*!@} - end defgroup cap_put_slice*/
+  /*!@} - end defgroup cap_put_slice*/
 
-    /*!@} - end defgroup decoder*/
+  /*!@} - end defgroup decoder*/
 
 #endif