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85 lines
3.2 KiB
C
85 lines
3.2 KiB
C
/**
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* @file utils/parallel_conv.c
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* @author Martin Pulec <pulec@cesnet.cz>
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*/
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/*
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* Copyright (c) 2021 CESNET, z. s. p. o.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, is permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of CESNET nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#include "config_unix.h"
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#include "config_win32.h"
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#endif
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#include "utils/parallel_conv.h"
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#include "utils/worker.h"
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struct parallel_pix_conv_data {
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decoder_t decode;
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int height;
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unsigned char *out_data;
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int out_linesize;
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const unsigned char *in_data;
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int in_linesize;
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};
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static void *parallel_pix_conv_task(void *arg) {
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struct parallel_pix_conv_data *data = arg;
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for (int y = 0; y < data->height; ++y) {
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data->decode(data->out_data, data->in_data, data->out_linesize, DEFAULT_R_SHIFT, DEFAULT_G_SHIFT, DEFAULT_B_SHIFT);
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data->out_data += data->out_linesize;
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data->in_data += data->in_linesize;
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}
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return NULL;
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}
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void parallel_pix_conv(int height, char *out, int out_linesize, const char *in, int in_linesize, decoder_t decode, int threads)
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{
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struct parallel_pix_conv_data data[threads];
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for (int i = 0; i < threads; ++i) {
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data[i].decode = decode;
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data[i].height = height / threads;
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data[i].out_data = (unsigned char *) out + i * data[i].height * out_linesize;
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data[i].out_linesize = out_linesize;
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data[i].in_data = (const unsigned char *) in + i * data[i].height * in_linesize;
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data[i].in_linesize = in_linesize;
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if (i == threads - 1) {
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data[i].height = height - (threads - 1) * (height / threads);
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}
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}
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task_run_parallel(parallel_pix_conv_task, threads, data, sizeof data[0], NULL);
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}
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