mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2026-11-06 05:17:42 +00:00
Mark Thompson
693195b518
Adds a new dsp function to compute a constants buffer in the form most suitable to the specific implementation. This gets called once per tile component to prepare the constants buffer, and then the transquant functions get a pointer to that buffer to use. CPU: Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz Before: decode_transquant_10_c: 333.2 decode_transquant_10_avx2: 65.5 ( 5.09x) After: decode_transquant_10_c: 330.9 decode_transquant_10_avx2: 57.3 ( 5.78x) No significant difference on ARM Cortex-A53/A73.
67 lines
2.2 KiB
C
67 lines
2.2 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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#ifndef AVCODEC_APV_DSP_H
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#define AVCODEC_APV_DSP_H
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#include <stddef.h>
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#include <stdint.h>
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/**
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* Size of the buffer holding constants for decode_transquant(), which
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* must be large enough for the layout used by any implementation.
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* The buffer must be 32-byte aligned.
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*/
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#define APV_DSP_CONSTANTS_SIZE 512
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typedef struct APVDSPContext {
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/**
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* Fill the constants buffer used by decode_transquant() for all
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* blocks with the same quantisation parameters. The layout of the
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* buffer is private to the implementation.
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*/
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void (*prepare_constants)(void *constants,
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const int16_t *qmatrix,
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int bit_depth,
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int qp_shift);
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/**
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* Run transquant for a single block. The constants argument must
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* have been prepared by a call to prepare_constants() matching the
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* implementation being used.
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*/
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void (*decode_transquant)(void *output,
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ptrdiff_t pitch,
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const int16_t *input,
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const void *constants);
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} APVDSPContext;
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void ff_apv_dsp_init(APVDSPContext *dsp);
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void ff_apv_prepare_constants_c(void *constants,
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const int16_t *qmatrix,
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int bit_depth,
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int qp_shift);
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void ff_apv_dsp_init_x86_64(APVDSPContext *dsp);
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void ff_apv_dsp_init_aarch64(APVDSPContext *dsp);
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#endif /* AVCODEC_APV_DSP_H */
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