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https://git.ffmpeg.org/ffmpeg.git
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d527d23872
The current code assumes that we have unaligned rows, which hurts on platforms with slower unaligned accesses. (Also, this lets the compiler unroll manually, which it seems to do in practice.)
125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 <stdint.h>
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "pixblockdsp.h"
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static void get_pixels_16_c(int16_t *restrict block, const uint8_t *pixels,
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ptrdiff_t stride)
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{
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for (int i = 0; i < 8; i++)
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AV_COPY128(block + i * 8, pixels + i * stride);
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}
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static void get_pixels_unaligned_16_c(int16_t *restrict block,
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const uint8_t *pixels, ptrdiff_t stride)
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{
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AV_COPY128U(block + 0 * 8, pixels + 0 * stride);
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AV_COPY128U(block + 1 * 8, pixels + 1 * stride);
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AV_COPY128U(block + 2 * 8, pixels + 2 * stride);
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AV_COPY128U(block + 3 * 8, pixels + 3 * stride);
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AV_COPY128U(block + 4 * 8, pixels + 4 * stride);
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AV_COPY128U(block + 5 * 8, pixels + 5 * stride);
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AV_COPY128U(block + 6 * 8, pixels + 6 * stride);
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AV_COPY128U(block + 7 * 8, pixels + 7 * stride);
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}
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static void get_pixels_8_c(int16_t *restrict block, const uint8_t *pixels,
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ptrdiff_t stride)
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{
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int i;
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/* read the pixels */
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for (i = 0; i < 8; i++) {
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block[0] = pixels[0];
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block[1] = pixels[1];
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block[2] = pixels[2];
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block[3] = pixels[3];
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block[4] = pixels[4];
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block[5] = pixels[5];
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block[6] = pixels[6];
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block[7] = pixels[7];
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pixels += stride;
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block += 8;
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}
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}
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static void diff_pixels_c(int16_t *restrict block, const uint8_t *s1,
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const uint8_t *s2, ptrdiff_t stride)
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{
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int i;
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/* read the pixels */
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for (i = 0; i < 8; i++) {
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block[0] = s1[0] - s2[0];
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block[1] = s1[1] - s2[1];
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block[2] = s1[2] - s2[2];
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block[3] = s1[3] - s2[3];
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block[4] = s1[4] - s2[4];
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block[5] = s1[5] - s2[5];
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block[6] = s1[6] - s2[6];
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block[7] = s1[7] - s2[7];
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s1 += stride;
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s2 += stride;
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block += 8;
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}
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}
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av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
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{
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av_unused const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
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c->diff_pixels_unaligned =
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c->diff_pixels = diff_pixels_c;
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switch (avctx->bits_per_raw_sample) {
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case 9:
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case 10:
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case 12:
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case 14:
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c->get_pixels_unaligned = get_pixels_unaligned_16_c;
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c->get_pixels = get_pixels_16_c;
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break;
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default:
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if (avctx->bits_per_raw_sample<=8 || avctx->codec_type != AVMEDIA_TYPE_VIDEO) {
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c->get_pixels_unaligned =
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c->get_pixels = get_pixels_8_c;
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}
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break;
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}
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#if ARCH_AARCH64
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ff_pixblockdsp_init_aarch64(c, avctx, high_bit_depth);
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#elif ARCH_ARM
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ff_pixblockdsp_init_arm(c, avctx, high_bit_depth);
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#elif ARCH_PPC
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ff_pixblockdsp_init_ppc(c, avctx, high_bit_depth);
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#elif ARCH_RISCV
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ff_pixblockdsp_init_riscv(c, avctx, high_bit_depth);
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#elif ARCH_X86
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ff_pixblockdsp_init_x86(c, avctx, high_bit_depth);
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#elif ARCH_MIPS
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ff_pixblockdsp_init_mips(c, avctx, high_bit_depth);
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#endif
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}
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