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 11 12 /*!\defgroup vp8_decoder WebM VP8 Decoder 13 * \ingroup vp8 14 * 15 * @{ 16 */ 17 /*!\file 18 * \brief Provides definitions for using the VP8 algorithm within the vpx Decoder 19 * interface. 20 */ 21 #ifndef VPX_VP8DX_H_ 22 #define VPX_VP8DX_H_ 23 24 #ifdef __cplusplus 25 extern "C" { 26 #endif 27 28 /* Include controls common to both the encoder and decoder */ 29 #include "./vp8.h" 30 31 /*!\name Algorithm interface for VP8 32 * 33 * This interface provides the capability to decode raw VP8 streams, as would 34 * be found in AVI files and other non-Flash uses. 35 * @{ 36 */ 37 extern vpx_codec_iface_t vpx_codec_vp8_dx_algo; 38 extern vpx_codec_iface_t *vpx_codec_vp8_dx(void); 39 40 /* TODO(jkoleszar): These move to VP9 in a later patch set. */ 41 extern vpx_codec_iface_t vpx_codec_vp9_dx_algo; 42 extern vpx_codec_iface_t *vpx_codec_vp9_dx(void); 43 /*!@} - end algorithm interface member group*/ 44 45 46 /*!\enum vp8_dec_control_id 47 * \brief VP8 decoder control functions 48 * 49 * This set of macros define the control functions available for the VP8 50 * decoder interface. 51 * 52 * \sa #vpx_codec_control 53 */ 54 enum vp8_dec_control_id { 55 /** control function to get info on which reference frames were updated 56 * by the last decode 57 */ 58 VP8D_GET_LAST_REF_UPDATES = VP8_DECODER_CTRL_ID_START, 59 60 /** check if the indicated frame is corrupted */ 61 VP8D_GET_FRAME_CORRUPTED, 62 63 /** control function to get info on which reference frames were used 64 * by the last decode 65 */ 66 VP8D_GET_LAST_REF_USED, 67 68 /** decryption function to decrypt encoded buffer data immediately 69 * before decoding. Takes a vp8_decrypt_init, which contains 70 * a callback function and opaque context pointer. 71 */ 72 VP8D_SET_DECRYPTOR, 73 74 /** control function to get the display dimensions for the current frame. */ 75 VP9D_GET_DISPLAY_SIZE, 76 77 /** For testing. */ 78 VP9_INVERT_TILE_DECODE_ORDER, 79 80 VP8_DECODER_CTRL_ID_MAX 81 }; 82 83 /*!\brief Structure to hold decryption state 84 * 85 * Defines a structure to hold the decryption state and access function. 86 */ 87 typedef struct vp8_decrypt_init { 88 /** Decrypt n bytes of data from input -> output, using the decrypt_state 89 * passed in VP8D_SET_DECRYPTOR. 90 */ 91 void (*decrypt_cb)(void *decrypt_state, const unsigned char *input, 92 unsigned char *output, int count); 93 /*! Decryption state. */ 94 void *decrypt_state; 95 } vp8_decrypt_init; 96 97 /*!\brief VP8 decoder control function parameter type 98 * 99 * Defines the data types that VP8D control functions take. Note that 100 * additional common controls are defined in vp8.h 101 * 102 */ 103 104 105 VPX_CTRL_USE_TYPE(VP8D_GET_LAST_REF_UPDATES, int *) 106 VPX_CTRL_USE_TYPE(VP8D_GET_FRAME_CORRUPTED, int *) 107 VPX_CTRL_USE_TYPE(VP8D_GET_LAST_REF_USED, int *) 108 VPX_CTRL_USE_TYPE(VP8D_SET_DECRYPTOR, vp8_decrypt_init *) 109 VPX_CTRL_USE_TYPE(VP9D_GET_DISPLAY_SIZE, int *) 110 VPX_CTRL_USE_TYPE(VP9_INVERT_TILE_DECODE_ORDER, int) 111 112 /*! @} - end defgroup vp8_decoder */ 113 114 #ifdef __cplusplus 115 } // extern "C" 116 #endif 117 118 #endif // VPX_VP8DX_H_ 119
