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libavcodec
fdctdsp.c
Go to the documentation of this file.
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/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
libavutil/attributes.h
"
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#include "
avcodec.h
"
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#include "
dct.h
"
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#include "
faandct.h
"
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#include "
fdctdsp.h
"
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#include "config.h"
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av_cold
void
ff_fdctdsp_init
(
FDCTDSPContext
*c,
AVCodecContext
*avctx)
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{
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const
unsigned
high_bit_depth = avctx->
bits_per_raw_sample
> 8;
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if
(avctx->
bits_per_raw_sample
== 10) {
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c->
fdct
=
ff_jpeg_fdct_islow_10
;
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c->
fdct248
=
ff_fdct248_islow_10
;
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}
else
{
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if
(avctx->
dct_algo
==
FF_DCT_FASTINT
) {
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c->
fdct
=
ff_fdct_ifast
;
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c->
fdct248
=
ff_fdct_ifast248
;
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}
else
if
(avctx->
dct_algo
==
FF_DCT_FAAN
) {
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c->
fdct
=
ff_faandct
;
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c->
fdct248
=
ff_faandct248
;
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}
else
{
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c->
fdct
=
ff_jpeg_fdct_islow_8
;
// slow/accurate/default
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c->
fdct248
=
ff_fdct248_islow_8
;
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}
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}
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if
(
ARCH_PPC
)
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ff_fdctdsp_init_ppc
(c, avctx, high_bit_depth);
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if
(
ARCH_X86
)
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ff_fdctdsp_init_x86
(c, avctx, high_bit_depth);
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}
ff_jpeg_fdct_islow_10
void ff_jpeg_fdct_islow_10(int16_t *data)
ff_fdct248_islow_10
void ff_fdct248_islow_10(int16_t *data)
ff_fdct_ifast
void ff_fdct_ifast(int16_t *data)
Definition:
jfdctfst.c:208
AVCodecContext::dct_algo
int dct_algo
DCT algorithm, see FF_DCT_* below.
Definition:
avcodec.h:2474
ARCH_X86
#define ARCH_X86
Definition:
config.h:33
ff_faandct248
void ff_faandct248(int16_t *data)
Definition:
faandct.c:181
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition:
avcodec.h:2530
FF_DCT_FAAN
#define FF_DCT_FAAN
Definition:
avcodec.h:2482
ff_fdctdsp_init
av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
Definition:
fdctdsp.c:26
FDCTDSPContext
Definition:
fdctdsp.h:26
attributes.h
Macro definitions for various function/variable attributes.
av_cold
#define av_cold
Definition:
attributes.h:66
dct.h
fdctdsp.h
ff_fdctdsp_init_x86
void ff_fdctdsp_init_x86(FDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition:
fdctdsp_init.c:26
ff_fdct248_islow_8
void ff_fdct248_islow_8(int16_t *data)
ff_jpeg_fdct_islow_8
void ff_jpeg_fdct_islow_8(int16_t *data)
ff_faandct
void ff_faandct(int16_t *data)
Definition:
faandct.c:121
avcodec.h
Libavcodec external API header.
FDCTDSPContext::fdct
void(* fdct)(int16_t *block)
Definition:
fdctdsp.h:27
AVCodecContext
main external API structure.
Definition:
avcodec.h:1050
ff_fdct_ifast248
void ff_fdct_ifast248(int16_t *data)
Definition:
jfdctfst.c:274
ARCH_PPC
#define ARCH_PPC
Definition:
config.h:24
ff_fdctdsp_init_ppc
av_cold void ff_fdctdsp_init_ppc(FDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition:
fdctdsp.c:465
FDCTDSPContext::fdct248
void(* fdct248)(int16_t *block)
Definition:
fdctdsp.h:28
FF_DCT_FASTINT
#define FF_DCT_FASTINT
Definition:
avcodec.h:2476
faandct.h
Floating point AAN DCT
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