FFmpeg
avdct.c
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1 /*
2  * Copyright (c) 2014 Michael Niedermayer <michaelni@gmx.at>
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 #include "avcodec.h"
22 #include "idctdsp.h"
23 #include "fdctdsp.h"
24 #include "pixblockdsp.h"
25 #include "avdct.h"
26 
27 #define OFFSET(x) offsetof(AVDCT,x)
28 #define DEFAULT 0 //should be NAN but it does not work as it is not a constant in glibc as required by ANSI/ISO C
29 //these names are too long to be readable
30 #define V AV_OPT_FLAG_VIDEO_PARAM
31 #define A AV_OPT_FLAG_AUDIO_PARAM
32 #define E AV_OPT_FLAG_ENCODING_PARAM
33 #define D AV_OPT_FLAG_DECODING_PARAM
34 
35 static const AVOption avdct_options[] = {
36 {"dct", "DCT algorithm", OFFSET(dct_algo), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, 0, INT_MAX, V|E, "dct"},
37 {"auto", "autoselect a good one", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_AUTO }, INT_MIN, INT_MAX, V|E, "dct"},
38 {"fastint", "fast integer (experimental / for debugging)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_FASTINT }, INT_MIN, INT_MAX, V|E, "dct"},
39 {"int", "accurate integer", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_INT }, INT_MIN, INT_MAX, V|E, "dct"},
40 {"mmx", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_MMX }, INT_MIN, INT_MAX, V|E, "dct"},
41 {"altivec", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_ALTIVEC }, INT_MIN, INT_MAX, V|E, "dct"},
42 {"faan", "floating point AAN DCT (experimental / for debugging)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_FAAN }, INT_MIN, INT_MAX, V|E, "dct"},
43 
44 {"idct", "select IDCT implementation", OFFSET(idct_algo), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, 0, INT_MAX, V|E|D, "idct"},
45 {"auto", "autoselect a good one", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_AUTO }, INT_MIN, INT_MAX, V|E|D, "idct"},
46 {"int", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_INT }, INT_MIN, INT_MAX, V|E|D, "idct"},
47 {"simple", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLE }, INT_MIN, INT_MAX, V|E|D, "idct"},
48 {"simplemmx", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEMMX }, INT_MIN, INT_MAX, V|E|D, "idct"},
49 {"arm", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_ARM }, INT_MIN, INT_MAX, V|E|D, "idct"},
50 {"altivec", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_ALTIVEC }, INT_MIN, INT_MAX, V|E|D, "idct"},
51 {"simplearm", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEARM }, INT_MIN, INT_MAX, V|E|D, "idct"},
52 {"simplearmv5te", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEARMV5TE }, INT_MIN, INT_MAX, V|E|D, "idct"},
53 {"simplearmv6", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEARMV6 }, INT_MIN, INT_MAX, V|E|D, "idct"},
54 {"simpleneon", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLENEON }, INT_MIN, INT_MAX, V|E|D, "idct"},
55 {"xvid", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_XVID }, INT_MIN, INT_MAX, V|E|D, "idct"},
56 {"xvidmmx", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_XVID }, INT_MIN, INT_MAX, V|E|D, "idct"},
57 {"faani", "floating point AAN IDCT (experimental / for debugging)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_FAAN }, INT_MIN, INT_MAX, V|D|E, "idct"},
58 {"simpleauto", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEAUTO }, INT_MIN, INT_MAX, V|E|D, "idct"},
59 
60 {"bits_per_sample", "", OFFSET(bits_per_sample), AV_OPT_TYPE_INT, {.i64 = 8 }, 0, 14, 0,},
61 {NULL},
62 };
63 
64 static const AVClass avdct_class = {
65  .class_name = "AVDCT",
66  .option = avdct_options,
67  .version = LIBAVUTIL_VERSION_INT,
68 };
69 
71 {
72  return &avdct_class;
73 }
74 
76 {
77  AVDCT *dsp = av_mallocz(sizeof(AVDCT));
78 
79  if (!dsp)
80  return NULL;
81 
82  dsp->av_class = &avdct_class;
84 
85  return dsp;
86 }
87 
89 {
91 
92  if (!avctx)
93  return AVERROR(ENOMEM);
94 
95  avctx->idct_algo = dsp->idct_algo;
96  avctx->dct_algo = dsp->dct_algo;
98 
99 #define COPY(src, name) memcpy(&dsp->name, &src.name, sizeof(dsp->name))
100 
101 #if CONFIG_IDCTDSP
102  {
103  IDCTDSPContext idsp;
104  ff_idctdsp_init(&idsp, avctx);
105  COPY(idsp, idct);
106  COPY(idsp, idct_permutation);
107  }
108 #endif
109 
110 #if CONFIG_FDCTDSP
111  {
112  FDCTDSPContext fdsp;
113  ff_fdctdsp_init(&fdsp, avctx);
114  COPY(fdsp, fdct);
115  }
116 #endif
117 
118 #if CONFIG_PIXBLOCKDSP
119  {
120  PixblockDSPContext pdsp;
121  ff_pixblockdsp_init(&pdsp, avctx);
122  COPY(pdsp, get_pixels);
123  }
124 #endif
125 
126  avcodec_free_context(&avctx);
127 
128  return 0;
129 }
#define FF_IDCT_SIMPLEARMV5TE
Definition: avcodec.h:2780
#define NULL
Definition: coverity.c:32
#define FF_DCT_INT
Definition: avcodec.h:2761
static void idct(int16_t block[64])
Definition: 4xm.c:163
int dct_algo
DCT algorithm, see FF_DCT_* below.
Definition: avcodec.h:2758
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define FF_IDCT_SIMPLE
Definition: avcodec.h:2774
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1328
#define FF_IDCT_ALTIVEC
Definition: avcodec.h:2777
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2799
#define FF_DCT_FAAN
Definition: avcodec.h:2764
av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
Definition: fdctdsp.c:26
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define DEFAULT
Definition: avdct.c:28
#define D
Definition: avdct.c:33
#define FF_IDCT_INT
Definition: avcodec.h:2773
#define FF_IDCT_ARM
Definition: avcodec.h:2776
static const AVOption avdct_options[]
Definition: avdct.c:35
#define FF_IDCT_AUTO
Definition: avcodec.h:2772
#define FF_IDCT_SIMPLEARM
Definition: avcodec.h:2778
#define FF_IDCT_SIMPLEAUTO
Definition: avcodec.h:2785
#define FF_DCT_MMX
Definition: avcodec.h:2762
#define FF_IDCT_XVID
Definition: avcodec.h:2779
static const AVClass avdct_class
Definition: avdct.c:64
int avcodec_dct_init(AVDCT *dsp)
Definition: avdct.c:88
av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
Definition: pixblockdsp.c:81
AVDCT * avcodec_dct_alloc(void)
Allocates a AVDCT context.
Definition: avdct.c:75
#define E
Definition: avdct.c:32
#define FF_DCT_ALTIVEC
Definition: avcodec.h:2763
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
#define FF_IDCT_SIMPLEARMV6
Definition: avcodec.h:2781
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2771
int dct_algo
DCT algorithm.
Definition: avdct.h:57
const AVClass * avcodec_dct_get_class(void)
Definition: avdct.c:70
Libavcodec external API header.
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer...
Definition: options.c:171
#define FF_IDCT_SIMPLENEON
Definition: avcodec.h:2783
main external API structure.
Definition: avcodec.h:1568
Describe the class of an AVClass context structure.
Definition: log.h:67
#define COPY(src, name)
#define OFFSET(x)
Definition: avdct.c:27
AVDCT context.
Definition: avdct.h:29
#define FF_IDCT_FAAN
Definition: avcodec.h:2782
#define FF_IDCT_SIMPLEMMX
Definition: avcodec.h:2775
const AVClass * av_class
Definition: avdct.h:30
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:238
#define FF_DCT_FASTINT
Definition: avcodec.h:2760
int idct_algo
IDCT algorithm.
Definition: avdct.h:63
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int bits_per_sample
Definition: avdct.h:69
#define FF_DCT_AUTO
Definition: avcodec.h:2759
#define V
Definition: avdct.c:30