aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* ARM-optimized IDCT functions
* Copyright (c) 2001 Lionel Ulmer
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stddef.h>
#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/arm/cpu.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/idctdsp.h"
#include "idct.h"
#include "idctdsp_arm.h"
void ff_add_pixels_clamped_arm(const int16_t *block, uint8_t *dest,
ptrdiff_t line_size);
/* XXX: those functions should be suppressed ASAP when all IDCTs are
* converted */
static void j_rev_dct_arm_put(uint8_t *dest, ptrdiff_t line_size,
int16_t *block)
{
ff_j_rev_dct_arm(block);
ff_put_pixels_clamped_c(block, dest, line_size);
}
static void j_rev_dct_arm_add(uint8_t *dest, ptrdiff_t line_size,
int16_t *block)
{
ff_j_rev_dct_arm(block);
ff_add_pixels_clamped_arm(block, dest, line_size);
}
static void simple_idct_arm_put(uint8_t *dest, ptrdiff_t line_size,
int16_t *block)
{
ff_simple_idct_arm(block);
ff_put_pixels_clamped_c(block, dest, line_size);
}
static void simple_idct_arm_add(uint8_t *dest, ptrdiff_t line_size,
int16_t *block)
{
ff_simple_idct_arm(block);
ff_add_pixels_clamped_arm(block, dest, line_size);
}
av_cold void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth)
{
int cpu_flags = av_get_cpu_flags();
if (!avctx->lowres && !high_bit_depth) {
if ((avctx->idct_algo == FF_IDCT_AUTO && !(avctx->flags & AV_CODEC_FLAG_BITEXACT)) ||
avctx->idct_algo == FF_IDCT_ARM) {
c->idct_put = j_rev_dct_arm_put;
c->idct_add = j_rev_dct_arm_add;
c->idct = ff_j_rev_dct_arm;
c->perm_type = FF_IDCT_PERM_LIBMPEG2;
} else if (avctx->idct_algo == FF_IDCT_SIMPLEARM) {
c->idct_put = simple_idct_arm_put;
c->idct_add = simple_idct_arm_add;
c->idct = ff_simple_idct_arm;
c->perm_type = FF_IDCT_PERM_NONE;
}
}
c->add_pixels_clamped = ff_add_pixels_clamped_arm;
if (have_armv5te(cpu_flags))
ff_idctdsp_init_armv5te(c, avctx, high_bit_depth);
if (have_armv6(cpu_flags))
ff_idctdsp_init_armv6(c, avctx, high_bit_depth);
if (have_neon(cpu_flags))
ff_idctdsp_init_neon(c, avctx, high_bit_depth);
}
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