qsv.h (3844B)
1 /* 2 * Intel MediaSDK QSV public API 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #ifndef AVCODEC_QSV_H 22 #define AVCODEC_QSV_H 23 24 #include <mfxvideo.h> 25 26 #include "libavutil/buffer.h" 27 28 /** 29 * This struct is used for communicating QSV parameters between libavcodec and 30 * the caller. It is managed by the caller and must be assigned to 31 * AVCodecContext.hwaccel_context. 32 * - decoding: hwaccel_context must be set on return from the get_format() 33 * callback 34 * - encoding: hwaccel_context must be set before avcodec_open2() 35 */ 36 typedef struct AVQSVContext { 37 /** 38 * If non-NULL, the session to use for encoding or decoding. 39 * Otherwise, libavcodec will try to create an internal session. 40 */ 41 mfxSession session; 42 43 /** 44 * The IO pattern to use. 45 */ 46 int iopattern; 47 48 /** 49 * Extra buffers to pass to encoder or decoder initialization. 50 */ 51 mfxExtBuffer **ext_buffers; 52 int nb_ext_buffers; 53 54 /** 55 * Encoding only. If this field is set to non-zero by the caller, libavcodec 56 * will create an mfxExtOpaqueSurfaceAlloc extended buffer and pass it to 57 * the encoder initialization. This only makes sense if iopattern is also 58 * set to MFX_IOPATTERN_IN_OPAQUE_MEMORY. 59 * 60 * The number of allocated opaque surfaces will be the sum of the number 61 * required by the encoder and the user-provided value nb_opaque_surfaces. 62 * The array of the opaque surfaces will be exported to the caller through 63 * the opaque_surfaces field. 64 * 65 * The caller must set this field to zero for oneVPL (MFX_VERSION >= 2.0) 66 */ 67 int opaque_alloc; 68 69 /** 70 * Encoding only, and only if opaque_alloc is set to non-zero. Before 71 * calling avcodec_open2(), the caller should set this field to the number 72 * of extra opaque surfaces to allocate beyond what is required by the 73 * encoder. 74 * 75 * On return from avcodec_open2(), this field will be set by libavcodec to 76 * the total number of allocated opaque surfaces. 77 */ 78 int nb_opaque_surfaces; 79 80 /** 81 * Encoding only, and only if opaque_alloc is set to non-zero. On return 82 * from avcodec_open2(), this field will be used by libavcodec to export the 83 * array of the allocated opaque surfaces to the caller, so they can be 84 * passed to other parts of the pipeline. 85 * 86 * The buffer reference exported here is owned and managed by libavcodec, 87 * the callers should make their own reference with av_buffer_ref() and free 88 * it with av_buffer_unref() when it is no longer needed. 89 * 90 * The buffer data is an nb_opaque_surfaces-sized array of mfxFrameSurface1. 91 */ 92 AVBufferRef *opaque_surfaces; 93 94 /** 95 * Encoding only, and only if opaque_alloc is set to non-zero. On return 96 * from avcodec_open2(), this field will be set to the surface type used in 97 * the opaque allocation request. 98 */ 99 int opaque_alloc_type; 100 } AVQSVContext; 101 102 /** 103 * Allocate a new context. 104 * 105 * It must be freed by the caller with av_free(). 106 */ 107 AVQSVContext *av_qsv_alloc_context(void); 108 109 #endif /* AVCODEC_QSV_H */