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 <mfx/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 */ 36typedef 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 int opaque_alloc; 66 67 /** 68 * Encoding only, and only if opaque_alloc is set to non-zero. Before 69 * calling avcodec_open2(), the caller should set this field to the number 70 * of extra opaque surfaces to allocate beyond what is required by the 71 * encoder. 72 * 73 * On return from avcodec_open2(), this field will be set by libavcodec to 74 * the total number of allocated opaque surfaces. 75 */ 76 int nb_opaque_surfaces; 77 78 /** 79 * Encoding only, and only if opaque_alloc is set to non-zero. On return 80 * from avcodec_open2(), this field will be used by libavcodec to export the 81 * array of the allocated opaque surfaces to the caller, so they can be 82 * passed to other parts of the pipeline. 83 * 84 * The buffer reference exported here is owned and managed by libavcodec, 85 * the callers should make their own reference with av_buffer_ref() and free 86 * it with av_buffer_unref() when it is no longer needed. 87 * 88 * The buffer data is an nb_opaque_surfaces-sized array of mfxFrameSurface1. 89 */ 90 AVBufferRef *opaque_surfaces; 91 92 /** 93 * Encoding only, and only if opaque_alloc is set to non-zero. On return 94 * from avcodec_open2(), this field will be set to the surface type used in 95 * the opaque allocation request. 96 */ 97 int opaque_alloc_type; 98} AVQSVContext; 99 100/** 101 * Allocate a new context. 102 * 103 * It must be freed by the caller with av_free(). 104 */ 105AVQSVContext *av_qsv_alloc_context(void); 106 107#endif /* AVCODEC_QSV_H */ 108