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fdctdsp.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/attributes.h"
20 #include "avcodec.h"
21 #include "dct.h"
22 #include "faandct.h"
23 #include "fdctdsp.h"
24 #include "config.h"
25 
27 {
28  const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
29 
30  if (avctx->bits_per_raw_sample == 10 || avctx->bits_per_raw_sample == 9) {
33  } else if (avctx->dct_algo == FF_DCT_FASTINT) {
34  c->fdct = ff_fdct_ifast;
36 #if CONFIG_FAANDCT
37  } else if (avctx->dct_algo == FF_DCT_FAAN) {
38  c->fdct = ff_faandct;
40 #endif /* CONFIG_FAANDCT */
41  } else {
42  c->fdct = ff_jpeg_fdct_islow_8; // slow/accurate/default
44  }
45 
46  if (ARCH_PPC)
47  ff_fdctdsp_init_ppc(c, avctx, high_bit_depth);
48  if (ARCH_X86)
49  ff_fdctdsp_init_x86(c, avctx, high_bit_depth);
50 }
void ff_jpeg_fdct_islow_10(int16_t *data)
void ff_fdct248_islow_10(int16_t *data)
void ff_fdct_ifast(int16_t *data)
Definition: jfdctfst.c:208
int dct_algo
DCT algorithm, see FF_DCT_* below.
Definition: avcodec.h:2670
void ff_faandct248(int16_t *data)
Definition: faandct.c:168
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2711
#define FF_DCT_FAAN
Definition: avcodec.h:2676
av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
Definition: fdctdsp.c:26
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
void ff_fdctdsp_init_x86(FDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition: fdctdsp_init.c:26
void ff_fdct248_islow_8(int16_t *data)
void ff_jpeg_fdct_islow_8(int16_t *data)
void ff_faandct(int16_t *data)
Definition: faandct.c:114
Libavcodec external API header.
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:27
main external API structure.
Definition: avcodec.h:1488
void ff_fdct_ifast248(int16_t *data)
Definition: jfdctfst.c:274
av_cold void ff_fdctdsp_init_ppc(FDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition: fdctdsp.c:464
static double c[64]
void(* fdct248)(int16_t *block)
Definition: fdctdsp.h:28
#define FF_DCT_FASTINT
Definition: avcodec.h:2672
Floating point AAN DCT