vda.h (4928B)
1 /* 2 * VDA HW acceleration 3 * 4 * copyright (c) 2011 Sebastien Zwickert 5 * 6 * This file is part of Libav. 7 * 8 * Libav is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * Libav is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with Libav; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 #ifndef AVCODEC_VDA_H 24 #define AVCODEC_VDA_H 25 26 /** 27 * @file 28 * @ingroup lavc_codec_hwaccel_vda 29 * Public libavcodec VDA header. 30 */ 31 32 #include "libavcodec/version.h" 33 34 #if FF_API_VDA_ASYNC 35 #include <pthread.h> 36 #endif 37 38 #include <stdint.h> 39 40 // emmintrin.h is unable to compile with -std=c99 -Werror=missing-prototypes 41 // http://openradar.appspot.com/8026390 42 #undef __GNUC_STDC_INLINE__ 43 44 #define Picture QuickdrawPicture 45 #include <VideoDecodeAcceleration/VDADecoder.h> 46 #undef Picture 47 48 /** 49 * @defgroup lavc_codec_hwaccel_vda VDA 50 * @ingroup lavc_codec_hwaccel 51 * 52 * @{ 53 */ 54 55 #if FF_API_VDA_ASYNC 56 /** 57 * This structure is used to store decoded frame information and data. 58 * 59 * @deprecated Use synchronous decoding mode. 60 */ 61 typedef struct vda_frame { 62 /** 63 * The PTS of the frame. 64 * 65 * - encoding: unused 66 * - decoding: Set/Unset by libavcodec. 67 */ 68 int64_t pts; 69 70 /** 71 * The CoreVideo buffer that contains the decoded data. 72 * 73 * - encoding: unused 74 * - decoding: Set/Unset by libavcodec. 75 */ 76 CVPixelBufferRef cv_buffer; 77 78 /** 79 * A pointer to the next frame. 80 * 81 * - encoding: unused 82 * - decoding: Set/Unset by libavcodec. 83 */ 84 struct vda_frame *next_frame; 85 } vda_frame; 86 #endif 87 88 /** 89 * This structure is used to provide the necessary configurations and data 90 * to the VDA Libav HWAccel implementation. 91 * 92 * The application must make it available as AVCodecContext.hwaccel_context. 93 */ 94 struct vda_context { 95 /** 96 * VDA decoder object. 97 * 98 * - encoding: unused 99 * - decoding: Set/Unset by libavcodec. 100 */ 101 VDADecoder decoder; 102 103 /** 104 * The Core Video pixel buffer that contains the current image data. 105 * 106 * encoding: unused 107 * decoding: Set by libavcodec. Unset by user. 108 */ 109 CVPixelBufferRef cv_buffer; 110 111 /** 112 * Use the hardware decoder in synchronous mode. 113 * 114 * encoding: unused 115 * decoding: Set by user. 116 */ 117 int use_sync_decoding; 118 119 #if FF_API_VDA_ASYNC 120 /** 121 * VDA frames queue ordered by presentation timestamp. 122 * 123 * @deprecated Use synchronous decoding mode. 124 * 125 * - encoding: unused 126 * - decoding: Set/Unset by libavcodec. 127 */ 128 vda_frame *queue; 129 130 /** 131 * Mutex for locking queue operations. 132 * 133 * @deprecated Use synchronous decoding mode. 134 * 135 * - encoding: unused 136 * - decoding: Set/Unset by libavcodec. 137 */ 138 pthread_mutex_t queue_mutex; 139 #endif 140 141 /** 142 * The frame width. 143 * 144 * - encoding: unused 145 * - decoding: Set/Unset by user. 146 */ 147 int width; 148 149 /** 150 * The frame height. 151 * 152 * - encoding: unused 153 * - decoding: Set/Unset by user. 154 */ 155 int height; 156 157 /** 158 * The frame format. 159 * 160 * - encoding: unused 161 * - decoding: Set/Unset by user. 162 */ 163 int format; 164 165 /** 166 * The pixel format for output image buffers. 167 * 168 * - encoding: unused 169 * - decoding: Set/Unset by user. 170 */ 171 OSType cv_pix_fmt_type; 172 173 /** 174 * The current bitstream buffer. 175 */ 176 uint8_t *priv_bitstream; 177 178 /** 179 * The current size of the bitstream. 180 */ 181 int priv_bitstream_size; 182 183 /** 184 * The reference size used for fast reallocation. 185 */ 186 int priv_allocated_size; 187 }; 188 189 /** Create the video decoder. */ 190 int ff_vda_create_decoder(struct vda_context *vda_ctx, 191 uint8_t *extradata, 192 int extradata_size); 193 194 /** Destroy the video decoder. */ 195 int ff_vda_destroy_decoder(struct vda_context *vda_ctx); 196 197 #if FF_API_VDA_ASYNC 198 /** 199 * Return the top frame of the queue. 200 * 201 * @deprecated Use synchronous decoding mode. 202 */ 203 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx); 204 205 /** 206 * Release the given frame. 207 * 208 * @deprecated Use synchronous decoding mode. 209 */ 210 void ff_vda_release_vda_frame(vda_frame *frame); 211 #endif 212 213 /** 214 * @} 215 */ 216 217 #endif /* AVCODEC_VDA_H */