FFmpeg: libavcodec/avdct.c Source File

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