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qsvdec.h
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1 /*
2  * Intel MediaSDK QSV utility functions
3  *
4  * copyright (c) 2013 Luca Barbato
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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_QSVDEC_H
24 #define AVCODEC_QSVDEC_H
25 
26 #include <stdint.h>
27 #include <sys/types.h>
28 
29 #include <mfx/mfxvideo.h>
30 
31 #include "libavutil/fifo.h"
32 #include "libavutil/frame.h"
33 #include "libavutil/pixfmt.h"
34 
35 #include "avcodec.h"
36 #include "qsv_internal.h"
37 
38 typedef struct QSVContext {
39  // the session used for decoding
40  mfxSession session;
41 
42  // the session we allocated internally, in case the caller did not provide
43  // one
45 
46  /**
47  * a linked list of frames currently being used by QSV
48  */
50 
53 
54  // we should to buffer input packets at some cases
55  // else it is not possible to handle dynamic stream changes correctly
56  // this fifo uses for input packets buffering
58 
59  // this flag indicates that header parsed,
60  // decoder instance created and ready to general decoding
62 
63  // we can not just re-init decoder if different sequence header arrived
64  // we should to deliver all buffered frames but we can not decode new packets
65  // this time. So when reinit_pending is non-zero we flushing decoder and
66  // accumulate new arrived packets into pkt_fifo
68 
69  // options set by the caller
71  int iopattern;
72 
73  char *load_plugins;
74 
75  mfxExtBuffer **ext_buffers;
77 } QSVContext;
78 
80 
82  AVFrame *frame, int *got_frame,
83  AVPacket *avpkt);
84 
86 
88 
89 #endif /* AVCODEC_QSVDEC_H */
int iopattern
Definition: qsvdec.h:71
const char * s
Definition: avisynth_c.h:768
int reinit_pending
Definition: qsvdec.h:67
AVFifoBuffer * pkt_fifo
Definition: qsvdec.h:57
AVFifoBuffer * input_fifo
Definition: qsvdec.h:52
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
mfxExtBuffer ** ext_buffers
Definition: qsvdec.h:75
QSVSession internal_qs
Definition: qsvdec.h:44
static AVFrame * frame
reference-counted frame API
void ff_qsv_decode_reset(AVCodecContext *avctx, QSVContext *q)
Definition: qsvdec.c:547
int engine_ready
Definition: qsvdec.h:61
int ff_qsv_map_pixfmt(enum AVPixelFormat format)
Definition: qsvdec.c:41
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1676
a very simple circular buffer FIFO implementation
static const char * format
Definition: movenc.c:47
char * load_plugins
Definition: qsvdec.h:73
int ff_qsv_decode_close(QSVContext *q)
Definition: qsvdec.c:592
int ff_qsv_decode(AVCodecContext *s, QSVContext *q, AVFrame *frame, int *got_frame, AVPacket *avpkt)
Definition: qsvdec.c:491
pixel format definitions
mfxSession session
Definition: ffmpeg_qsv.c:32
AVFifoBuffer * async_fifo
Definition: qsvdec.h:51
int async_depth
Definition: qsvdec.h:70
QSVFrame * work_frames
a linked list of frames currently being used by QSV
Definition: qsvdec.h:49
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1578
int nb_ext_buffers
Definition: qsvdec.h:76