vpx/vp8cx.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10 #ifndef VPX_VP8CX_H_
  11 #define VPX_VP8CX_H_
  12
  13 /*!\defgroup vp8_encoder WebM VP8/VP9 Encoder
  14  * \ingroup vp8
  15  *
  16  * @{
  17  */
  18 #include "./vp8.h"
  19
  20 /*!\file
  21  * \brief Provides definitions for using VP8 or VP9 encoder algorithm within the
  22  *        vpx Codec Interface.
  23  */
  24
  25 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 /*!\name Algorithm interface for VP8
  30  *
  31  * This interface provides the capability to encode raw VP8 streams.
  32  * @{
  33  */
  34 extern vpx_codec_iface_t  vpx_codec_vp8_cx_algo;
  35 extern vpx_codec_iface_t *vpx_codec_vp8_cx(void);
  36 /*!@} - end algorithm interface member group*/
  37
  38 /*!\name Algorithm interface for VP9
  39  *
  40  * This interface provides the capability to encode raw VP9 streams.
  41  * @{
  42  */
  43 extern vpx_codec_iface_t  vpx_codec_vp9_cx_algo;
  44 extern vpx_codec_iface_t *vpx_codec_vp9_cx(void);
  45 /*!@} - end algorithm interface member group*/
  46
  47
  48 /*
  49  * Algorithm Flags
  50  */
  51
  52 /*!\brief Don't reference the last frame
  53  *
  54  * When this flag is set, the encoder will not use the last frame as a
  55  * predictor. When not set, the encoder will choose whether to use the
  56  * last frame or not automatically.
  57  */
  58 #define VP8_EFLAG_NO_REF_LAST      (1<<16)
  59
  60
  61 /*!\brief Don't reference the golden frame
  62  *
  63  * When this flag is set, the encoder will not use the golden frame as a
  64  * predictor. When not set, the encoder will choose whether to use the
  65  * golden frame or not automatically.
  66  */
  67 #define VP8_EFLAG_NO_REF_GF        (1<<17)
  68
  69
  70 /*!\brief Don't reference the alternate reference frame
  71  *
  72  * When this flag is set, the encoder will not use the alt ref frame as a
  73  * predictor. When not set, the encoder will choose whether to use the
  74  * alt ref frame or not automatically.
  75  */
  76 #define VP8_EFLAG_NO_REF_ARF       (1<<21)
  77
  78
  79 /*!\brief Don't update the last frame
  80  *
  81  * When this flag is set, the encoder will not update the last frame with
  82  * the contents of the current frame.
  83  */
  84 #define VP8_EFLAG_NO_UPD_LAST      (1<<18)
  85
  86
  87 /*!\brief Don't update the golden frame
  88  *
  89  * When this flag is set, the encoder will not update the golden frame with
  90  * the contents of the current frame.
  91  */
  92 #define VP8_EFLAG_NO_UPD_GF        (1<<22)
  93
  94
  95 /*!\brief Don't update the alternate reference frame
  96  *
  97  * When this flag is set, the encoder will not update the alt ref frame with
  98  * the contents of the current frame.
  99  */
 100 #define VP8_EFLAG_NO_UPD_ARF       (1<<23)
 101
 102
 103 /*!\brief Force golden frame update
 104  *
 105  * When this flag is set, the encoder copy the contents of the current frame
 106  * to the golden frame buffer.
 107  */
 108 #define VP8_EFLAG_FORCE_GF         (1<<19)
 109
 110
 111 /*!\brief Force alternate reference frame update
 112  *
 113  * When this flag is set, the encoder copy the contents of the current frame
 114  * to the alternate reference frame buffer.
 115  */
 116 #define VP8_EFLAG_FORCE_ARF        (1<<24)
 117
 118
 119 /*!\brief Disable entropy update
 120  *
 121  * When this flag is set, the encoder will not update its internal entropy
 122  * model based on the entropy of this frame.
 123  */
 124 #define VP8_EFLAG_NO_UPD_ENTROPY   (1<<20)
 125
 126
 127 /*!\brief VPx encoder control functions
 128  *
 129  * This set of macros define the control functions available for VPx
 130  * encoder interface.
 131  *
 132  * \sa #vpx_codec_control
 133  */
 134 enum vp8e_enc_control_id {
 135   VP8E_UPD_ENTROPY           = 5,  /**< control function to set mode of entropy update in encoder */
 136   VP8E_UPD_REFERENCE,              /**< control function to set reference update mode in encoder */
 137   VP8E_USE_REFERENCE,              /**< control function to set which reference frame encoder can use */
 138   VP8E_SET_ROI_MAP,                /**< control function to pass an ROI map to encoder */
 139   VP8E_SET_ACTIVEMAP,              /**< control function to pass an Active map to encoder */
 140   VP8E_SET_SCALEMODE         = 11, /**< control function to set encoder scaling mode */
 141   /*!\brief control function to set vp8 encoder cpuused
 142    *
 143    * Changes in this value influences, among others, the encoder's selection
 144    * of motion estimation methods. Values greater than 0 will increase encoder
 145    * speed at the expense of quality.
 146    * The full set of adjustments can be found in
 147    * onyx_if.c:vp8_set_speed_features().
 148    * \todo List highlights of the changes at various levels.
 149    *
 150    * \note Valid range: -16..16
 151    */
 152   VP8E_SET_CPUUSED           = 13,
 153   VP8E_SET_ENABLEAUTOALTREF,       /**< control function to enable vp8 to automatic set and use altref frame */
 154   /*!\brief control function to set noise sensitivity
 155    *
 156    * 0: off, 1: OnYOnly, 2: OnYUV,
 157    * 3: OnYUVAggressive, 4: Adaptive
 158    */
 159   VP8E_SET_NOISE_SENSITIVITY,
 160   VP8E_SET_SHARPNESS,              /**< control function to set sharpness */
 161   VP8E_SET_STATIC_THRESHOLD,       /**< control function to set the threshold for macroblocks treated static */
 162   VP8E_SET_TOKEN_PARTITIONS,       /**< control function to set the number of token partitions  */
 163   VP8E_GET_LAST_QUANTIZER,         /**< return the quantizer chosen by the
 164                                           encoder for the last frame using the internal
 165                                           scale */
 166   VP8E_GET_LAST_QUANTIZER_64,      /**< return the quantizer chosen by the
 167                                           encoder for the last frame, using the 0..63
 168                                           scale as used by the rc_*_quantizer config
 169                                           parameters */
 170   VP8E_SET_ARNR_MAXFRAMES,         /**< control function to set the max number of frames blurred creating arf*/
 171   VP8E_SET_ARNR_STRENGTH,          //!< control function to set the filter
 172                                    //!< strength for the arf
 173
 174   /*!\deprecated control function to set the filter type to use for the arf */
 175   VP8E_SET_ARNR_TYPE,
 176
 177   VP8E_SET_TUNING,                 /**< control function to set visual tuning */
 178   /*!\brief control function to set constrained quality level
 179    *
 180    * \attention For this value to be used vpx_codec_enc_cfg_t::g_usage must be
 181    *            set to #VPX_CQ.
 182    * \note Valid range: 0..63
 183    */
 184   VP8E_SET_CQ_LEVEL,
 185
 186   /*!\brief Max data rate for Intra frames
 187    *
 188    * This value controls additional clamping on the maximum size of a
 189    * keyframe. It is expressed as a percentage of the average
 190    * per-frame bitrate, with the special (and default) value 0 meaning
 191    * unlimited, or no additional clamping beyond the codec's built-in
 192    * algorithm.
 193    *
 194    * For example, to allocate no more than 4.5 frames worth of bitrate
 195    * to a keyframe, set this to 450.
 196    *
 197    */
 198   VP8E_SET_MAX_INTRA_BITRATE_PCT,
 199   VP8E_SET_FRAME_FLAGS,           /**< control function to set reference and update frame flags */
 200
 201   /*!\brief Max data rate for Inter frames
 202    *
 203    * This value controls additional clamping on the maximum size of an
 204    * inter frame. It is expressed as a percentage of the average
 205    * per-frame bitrate, with the special (and default) value 0 meaning
 206    * unlimited, or no additional clamping beyond the codec's built-in
 207    * algorithm.
 208    *
 209    * For example, to allow no more than 4.5 frames worth of bitrate
 210    * to an inter frame, set this to 450.
 211    *
 212    */
 213   VP8E_SET_MAX_INTER_BITRATE_PCT,
 214
 215   /*!\brief Boost percentage for Golden Frame in CBR mode
 216    *
 217    * This value controls the amount of boost given to Golden Frame in
 218    * CBR mode. It is expressed as a percentage of the average
 219    * per-frame bitrate, with the special (and default) value 0 meaning
 220    * the feature is off, i.e., no golden frame boost in CBR mode and
 221    * average bitrate target is used.
 222    *
 223    * For example, to allow 100% more bits, i.e, 2X, in a golden frame
 224    * than average frame, set this to 100.
 225    *
 226    * Supported in codecs: VP9
 227    */
 228   VP9E_SET_GF_CBR_BOOST_PCT,
 229
 230   /*!\brief Codec control function to set the temporal layer id
 231    *
 232    * For temporal scalability: this control allows the application to set the
 233    * layer id for each frame to be encoded. Note that this control must be set
 234    * for every frame prior to encoding. The usage of this control function
 235    * supersedes the internal temporal pattern counter, which is now deprecated.
 236    */
 237   VP8E_SET_TEMPORAL_LAYER_ID,
 238
 239   VP8E_SET_SCREEN_CONTENT_MODE,  /**<control function to set encoder screen content mode */
 240
 241   /*!\brief Codec control function to set lossless encoding mode
 242    *
 243    * VP9 can operate in lossless encoding mode, in which the bitstream
 244    * produced will be able to decode and reconstruct a perfect copy of
 245    * input source. This control function provides a mean to switch encoder
 246    * into lossless coding mode(1) or normal coding mode(0) that may be lossy.
 247    *                          0 = lossy coding mode
 248    *                          1 = lossless coding mode
 249    *
 250    *  By default, encoder operates in normal coding mode (maybe lossy).
 251    */
 252   VP9E_SET_LOSSLESS,
 253
 254   /*!\brief Codec control function to set number of tile columns
 255    *
 256    * In encoding and decoding, VP9 allows an input image frame be partitioned
 257    * into separated vertical tile columns, which can be encoded or decoded
 258    * independently. This enables easy implementation of parallel encoding and
 259    * decoding. This control requests the encoder to use column tiles in
 260    * encoding an input frame, with number of tile columns (in Log2 unit) as
 261    * the parameter:
 262    *             0 = 1 tile column
 263    *             1 = 2 tile columns
 264    *             2 = 4 tile columns
 265    *             .....
 266    *             n = 2**n tile columns
 267    * The requested tile columns will be capped by encoder based on image size
 268    * limitation (The minimum width of a tile column is 256 pixel, the maximum
 269    * is 4096).
 270    *
 271    * By default, the value is 0, i.e. one single column tile for entire image.
 272    */
 273   VP9E_SET_TILE_COLUMNS,
 274
 275   /*!\brief Codec control function to set number of tile rows
 276    *
 277    * In encoding and decoding, VP9 allows an input image frame be partitioned
 278    * into separated horizontal tile rows. Tile rows are encoded or decoded
 279    * sequentially. Even though encoding/decoding of later tile rows depends on
 280    * earlier ones, this allows the encoder to output data packets for tile rows
 281    * prior to completely processing all tile rows in a frame, thereby reducing
 282    * the latency in processing between input and output. The parameter
 283    * for this control describes the number of tile rows, which has a valid
 284    * range [0, 2]:
 285    *            0 = 1 tile row
 286    *            1 = 2 tile rows
 287    *            2 = 4 tile rows
 288    *
 289    * By default, the value is 0, i.e. one single row tile for entire image.
 290    */
 291   VP9E_SET_TILE_ROWS,
 292
 293   /*!\brief Codec control function to enable frame parallel decoding feature
 294    *
 295    * VP9 has a bitstream feature to reduce decoding dependency between frames
 296    * by turning off backward update of probability context used in encoding
 297    * and decoding. This allows staged parallel processing of more than one
 298    * video frames in the decoder. This control function provides a mean to
 299    * turn this feature on or off for bitstreams produced by encoder.
 300    *
 301    * By default, this feature is off.
 302    */
 303   VP9E_SET_FRAME_PARALLEL_DECODING,
 304
 305   /*!\brief Codec control function to set adaptive quantization mode
 306    *
 307    * VP9 has a segment based feature that allows encoder to adaptively change
 308    * quantization parameter for each segment within a frame to improve the
 309    * subjective quality. This control makes encoder operate in one of the
 310    * several AQ_modes supported.
 311    *
 312    * By default, encoder operates with AQ_Mode 0(adaptive quantization off).
 313    */
 314   VP9E_SET_AQ_MODE,
 315
 316   /*!\brief Codec control function to enable/disable periodic Q boost
 317    *
 318    * One VP9 encoder speed feature is to enable quality boost by lowering
 319    * frame level Q periodically. This control function provides a mean to
 320    * turn on/off this feature.
 321    *               0 = off
 322    *               1 = on
 323    *
 324    * By default, the encoder is allowed to use this feature for appropriate
 325    * encoding modes.
 326    */
 327   VP9E_SET_FRAME_PERIODIC_BOOST,
 328
 329   /*!\brief control function to set noise sensitivity
 330    *
 331    *  0: off, 1: OnYOnly
 332    */
 333   VP9E_SET_NOISE_SENSITIVITY,
 334
 335   /*!\brief control function to turn on/off SVC in encoder.
 336    * \note Return value is VPX_CODEC_INVALID_PARAM if the encoder does not
 337    *       support SVC in its current encoding mode
 338    *  0: off, 1: on
 339    */
 340   VP9E_SET_SVC,
 341
 342   /*!\brief control function to set parameters for SVC.
 343    * \note Parameters contain min_q, max_q, scaling factor for each of the
 344    *       SVC layers.
 345    */
 346   VP9E_SET_SVC_PARAMETERS,
 347
 348   /*!\brief control function to set svc layer for spatial and temporal.
 349    * \note Valid ranges: 0..#vpx_codec_enc_cfg::ss_number_layers for spatial
 350    *                     layer and 0..#vpx_codec_enc_cfg::ts_number_layers for
 351    *                     temporal layer.
 352    */
 353   VP9E_SET_SVC_LAYER_ID,
 354
 355   /*!\brief control function to set content type.
 356    * \note Valid parameter range:
 357    *              VP9E_CONTENT_DEFAULT = Regular video content (Default)
 358    *              VP9E_CONTENT_SCREEN  = Screen capture content
 359    */
 360   VP9E_SET_TUNE_CONTENT,
 361
 362   /*!\brief control function to get svc layer ID.
 363    * \note The layer ID returned is for the data packet from the registered
 364    *       callback function.
 365    */
 366   VP9E_GET_SVC_LAYER_ID,
 367
 368   /*!\brief control function to register callback for getting per layer packet.
 369    * \note Parameter for this control function is a structure with a callback
 370    *       function and a pointer to private data used by the callback.
 371    */
 372   VP9E_REGISTER_CX_CALLBACK,
 373
 374   /*!\brief control function to set color space info.
 375    * \note Valid ranges: 0..7, default is "UNKNOWN".
 376    *                     0 = UNKNOWN,
 377    *                     1 = BT_601
 378    *                     2 = BT_709
 379    *                     3 = SMPTE_170
 380    *                     4 = SMPTE_240
 381    *                     5 = BT_2020
 382    *                     6 = RESERVED
 383    *                     7 = SRGB
 384    */
 385   VP9E_SET_COLOR_SPACE,
 386 };
 387
 388 /*!\brief vpx 1-D scaling mode
 389  *
 390  * This set of constants define 1-D vpx scaling modes
 391  */
 392 typedef enum vpx_scaling_mode_1d {
 393   VP8E_NORMAL      = 0,
 394   VP8E_FOURFIVE    = 1,
 395   VP8E_THREEFIVE   = 2,
 396   VP8E_ONETWO      = 3
 397 } VPX_SCALING_MODE;
 398
 399
 400 /*!\brief  vpx region of interest map
 401  *
 402  * These defines the data structures for the region of interest map
 403  *
 404  */
 405
 406 typedef struct vpx_roi_map {
 407   /*! An id between 0 and 3 for each 16x16 region within a frame. */
 408   unsigned char *roi_map;
 409   unsigned int rows;       /**< Number of rows. */
 410   unsigned int cols;       /**< Number of columns. */
 411   // TODO(paulwilkins): broken for VP9 which has 8 segments
 412   // q and loop filter deltas for each segment
 413   // (see MAX_MB_SEGMENTS)
 414   int delta_q[4];          /**< Quantizer deltas. */
 415   int delta_lf[4];         /**< Loop filter deltas. */
 416   /*! Static breakout threshold for each segment. */
 417   unsigned int static_threshold[4];
 418 } vpx_roi_map_t;
 419
 420 /*!\brief  vpx active region map
 421  *
 422  * These defines the data structures for active region map
 423  *
 424  */
 425
 426
 427 typedef struct vpx_active_map {
 428   unsigned char  *active_map; /**< specify an on (1) or off (0) each 16x16 region within a frame */
 429   unsigned int    rows;       /**< number of rows */
 430   unsigned int    cols;       /**< number of cols */
 431 } vpx_active_map_t;
 432
 433 /*!\brief  vpx image scaling mode
 434  *
 435  * This defines the data structure for image scaling mode
 436  *
 437  */
 438 typedef struct vpx_scaling_mode {
 439   VPX_SCALING_MODE    h_scaling_mode;  /**< horizontal scaling mode */
 440   VPX_SCALING_MODE    v_scaling_mode;  /**< vertical scaling mode   */
 441 } vpx_scaling_mode_t;
 442
 443 /*!\brief VP8 token partition mode
 444  *
 445  * This defines VP8 partitioning mode for compressed data, i.e., the number of
 446  * sub-streams in the bitstream. Used for parallelized decoding.
 447  *
 448  */
 449
 450 typedef enum {
 451   VP8_ONE_TOKENPARTITION   = 0,
 452   VP8_TWO_TOKENPARTITION   = 1,
 453   VP8_FOUR_TOKENPARTITION  = 2,
 454   VP8_EIGHT_TOKENPARTITION = 3
 455 } vp8e_token_partitions;
 456
 457 /*!brief VP9 encoder content type */
 458 typedef enum {
 459   VP9E_CONTENT_DEFAULT,
 460   VP9E_CONTENT_SCREEN,
 461   VP9E_CONTENT_INVALID
 462 } vp9e_tune_content;
 463
 464 /*!\brief VP8 model tuning parameters
 465  *
 466  * Changes the encoder to tune for certain types of input material.
 467  *
 468  */
 469 typedef enum {
 470   VP8_TUNE_PSNR,
 471   VP8_TUNE_SSIM
 472 } vp8e_tuning;
 473
 474 /*!\brief  vp9 svc layer parameters
 475  *
 476  * This defines the spatial and temporal layer id numbers for svc encoding.
 477  * This is used with the #VP9E_SET_SVC_LAYER_ID control to set the spatial and
 478  * temporal layer id for the current frame.
 479  *
 480  */
 481 typedef struct vpx_svc_layer_id {
 482   int spatial_layer_id;       /**< Spatial layer id number. */
 483   int temporal_layer_id;      /**< Temporal layer id number. */
 484 } vpx_svc_layer_id_t;
 485
 486 /*!\brief VP8 encoder control function parameter type
 487  *
 488  * Defines the data types that VP8E control functions take. Note that
 489  * additional common controls are defined in vp8.h
 490  *
 491  */
 492
 493
 494 /* These controls have been deprecated in favor of the flags parameter to
 495  * vpx_codec_encode(). See the definition of VP8_EFLAG_* above.
 496  */
 497 VPX_CTRL_USE_TYPE_DEPRECATED(VP8E_UPD_ENTROPY,            int)
 498 VPX_CTRL_USE_TYPE_DEPRECATED(VP8E_UPD_REFERENCE,          int)
 499 VPX_CTRL_USE_TYPE_DEPRECATED(VP8E_USE_REFERENCE,          int)
 500
 501 VPX_CTRL_USE_TYPE(VP8E_SET_FRAME_FLAGS,        int)
 502 VPX_CTRL_USE_TYPE(VP8E_SET_TEMPORAL_LAYER_ID,  int)
 503 VPX_CTRL_USE_TYPE(VP8E_SET_ROI_MAP,            vpx_roi_map_t *)
 504 VPX_CTRL_USE_TYPE(VP8E_SET_ACTIVEMAP,          vpx_active_map_t *)
 505 VPX_CTRL_USE_TYPE(VP8E_SET_SCALEMODE,          vpx_scaling_mode_t *)
 506
 507 VPX_CTRL_USE_TYPE(VP9E_SET_SVC,                int)
 508 VPX_CTRL_USE_TYPE(VP9E_SET_SVC_PARAMETERS,     void *)
 509 VPX_CTRL_USE_TYPE(VP9E_REGISTER_CX_CALLBACK,   void *)
 510 VPX_CTRL_USE_TYPE(VP9E_SET_SVC_LAYER_ID,       vpx_svc_layer_id_t *)
 511
 512 VPX_CTRL_USE_TYPE(VP8E_SET_CPUUSED,            int)
 513 VPX_CTRL_USE_TYPE(VP8E_SET_ENABLEAUTOALTREF,   unsigned int)
 514 VPX_CTRL_USE_TYPE(VP8E_SET_NOISE_SENSITIVITY,  unsigned int)
 515 VPX_CTRL_USE_TYPE(VP8E_SET_SHARPNESS,          unsigned int)
 516 VPX_CTRL_USE_TYPE(VP8E_SET_STATIC_THRESHOLD,   unsigned int)
 517 VPX_CTRL_USE_TYPE(VP8E_SET_TOKEN_PARTITIONS,   int) /* vp8e_token_partitions */
 518
 519 VPX_CTRL_USE_TYPE(VP8E_SET_ARNR_MAXFRAMES,     unsigned int)
 520 VPX_CTRL_USE_TYPE(VP8E_SET_ARNR_STRENGTH,     unsigned int)
 521 VPX_CTRL_USE_TYPE_DEPRECATED(VP8E_SET_ARNR_TYPE,     unsigned int)
 522 VPX_CTRL_USE_TYPE(VP8E_SET_TUNING,             int) /* vp8e_tuning */
 523 VPX_CTRL_USE_TYPE(VP8E_SET_CQ_LEVEL,      unsigned int)
 524
 525 VPX_CTRL_USE_TYPE(VP9E_SET_TILE_COLUMNS,  int)
 526 VPX_CTRL_USE_TYPE(VP9E_SET_TILE_ROWS,  int)
 527
 528 VPX_CTRL_USE_TYPE(VP8E_GET_LAST_QUANTIZER,     int *)
 529 VPX_CTRL_USE_TYPE(VP8E_GET_LAST_QUANTIZER_64,  int *)
 530 VPX_CTRL_USE_TYPE(VP9E_GET_SVC_LAYER_ID,  vpx_svc_layer_id_t *)
 531
 532 VPX_CTRL_USE_TYPE(VP8E_SET_MAX_INTRA_BITRATE_PCT, unsigned int)
 533 VPX_CTRL_USE_TYPE(VP8E_SET_MAX_INTER_BITRATE_PCT, unsigned int)
 534
 535 VPX_CTRL_USE_TYPE(VP8E_SET_SCREEN_CONTENT_MODE, unsigned int)
 536
 537 VPX_CTRL_USE_TYPE(VP9E_SET_GF_CBR_BOOST_PCT, unsigned int)
 538
 539 VPX_CTRL_USE_TYPE(VP9E_SET_LOSSLESS, unsigned int)
 540
 541 VPX_CTRL_USE_TYPE(VP9E_SET_FRAME_PARALLEL_DECODING, unsigned int)
 542
 543 VPX_CTRL_USE_TYPE(VP9E_SET_AQ_MODE, unsigned int)
 544
 545 VPX_CTRL_USE_TYPE(VP9E_SET_FRAME_PERIODIC_BOOST, unsigned int)
 546
 547 VPX_CTRL_USE_TYPE(VP9E_SET_NOISE_SENSITIVITY,  unsigned int)
 548
 549 VPX_CTRL_USE_TYPE(VP9E_SET_TUNE_CONTENT, int) /* vp9e_tune_content */
 550
 551 VPX_CTRL_USE_TYPE(VP9E_SET_COLOR_SPACE, int)
 552 /*! @} - end defgroup vp8_encoder */
 553 #ifdef __cplusplus
 554 }  // extern "C"
 555 #endif
 556
 557 #endif  // VPX_VP8CX_H_