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path: root/libavcodec/avdct.c (plain)
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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
35static 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#if FF_API_ARCH_SH4
52{"sh4", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SH4 }, INT_MIN, INT_MAX, V|E|D, "idct"},
53#endif
54{"simplearm", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEARM }, INT_MIN, INT_MAX, V|E|D, "idct"},
55{"simplearmv5te", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEARMV5TE }, INT_MIN, INT_MAX, V|E|D, "idct"},
56{"simplearmv6", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEARMV6 }, INT_MIN, INT_MAX, V|E|D, "idct"},
57{"simpleneon", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLENEON }, INT_MIN, INT_MAX, V|E|D, "idct"},
58#if FF_API_ARCH_ALPHA
59{"simplealpha", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEALPHA }, INT_MIN, INT_MAX, V|E|D, "idct"},
60#endif
61#if FF_API_UNUSED_MEMBERS
62{"ipp", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_IPP }, INT_MIN, INT_MAX, V|E|D, "idct"},
63#endif
64{"xvid", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_XVID }, INT_MIN, INT_MAX, V|E|D, "idct"},
65{"xvidmmx", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_XVID }, INT_MIN, INT_MAX, V|E|D, "idct"},
66{"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"},
67{"simpleauto", "experimental / for debugging", 0, AV_OPT_TYPE_CONST, {.i64 = FF_IDCT_SIMPLEAUTO }, INT_MIN, INT_MAX, V|E|D, "idct"},
68
69{"bits_per_sample", "", OFFSET(bits_per_sample), AV_OPT_TYPE_INT, {.i64 = 8 }, 0, 14, 0,},
70{NULL},
71};
72
73static const AVClass avdct_class = {
74 .class_name = "AVDCT",
75 .option = avdct_options,
76 .version = LIBAVUTIL_VERSION_INT,
77};
78
79const AVClass *avcodec_dct_get_class(void)
80{
81 return &avdct_class;
82}
83
84AVDCT *avcodec_dct_alloc(void)
85{
86 AVDCT *dsp = av_mallocz(sizeof(AVDCT));
87
88 if (!dsp)
89 return NULL;
90
91 dsp->av_class = &avdct_class;
92 av_opt_set_defaults(dsp);
93
94 return dsp;
95}
96
97int avcodec_dct_init(AVDCT *dsp)
98{
99 AVCodecContext *avctx = avcodec_alloc_context3(NULL);
100
101 if (!avctx)
102 return AVERROR(ENOMEM);
103
104 avctx->idct_algo = dsp->idct_algo;
105 avctx->dct_algo = dsp->dct_algo;
106 avctx->bits_per_raw_sample = dsp->bits_per_sample;
107
108#define COPY(src, name) memcpy(&dsp->name, &src.name, sizeof(dsp->name))
109
110#if CONFIG_IDCTDSP
111 {
112 IDCTDSPContext idsp;
113 ff_idctdsp_init(&idsp, avctx);
114 COPY(idsp, idct);
115 COPY(idsp, idct_permutation);
116 }
117#endif
118
119#if CONFIG_FDCTDSP
120 {
121 FDCTDSPContext fdsp;
122 ff_fdctdsp_init(&fdsp, avctx);
123 COPY(fdsp, fdct);
124 }
125#endif
126
127#if CONFIG_PIXBLOCKDSP
128 {
129 PixblockDSPContext pdsp;
130 ff_pixblockdsp_init(&pdsp, avctx);
131 COPY(pdsp, get_pixels);
132 }
133#endif
134
135 avcodec_close(avctx);
136 av_free(avctx);
137
138 return 0;
139}
140
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