mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
/*
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* Copyright © 2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <cairo.h>
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#include "wcap-decode.h"
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static void
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wcap_decoder_decode_rectangle(struct wcap_decoder *decoder,
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struct wcap_rectangle *rect)
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{
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uint32_t v, *p = decoder->p, *d;
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int width = rect->x2 - rect->x1, height = rect->y2 - rect->y1;
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int x, i, j, k, l, count = width * height;
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unsigned char r, g, b, dr, dg, db;
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d = decoder->frame + (rect->y2 - 1) * decoder->width;
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x = rect->x1;
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i = 0;
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while (i < count) {
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v = *p++;
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l = v >> 24;
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if (l < 0xe0) {
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j = l + 1;
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} else {
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j = 1 << (l - 0xe0 + 7);
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}
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dr = (v >> 16);
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dg = (v >> 8);
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db = (v >> 0);
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for (k = 0; k < j; k++) {
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r = (d[x] >> 16) + dr;
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g = (d[x] >> 8) + dg;
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b = (d[x] >> 0) + db;
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d[x] = 0xff000000 | (r << 16) | (g << 8) | b;
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x++;
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if (x == rect->x2) {
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x = rect->x1;
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d -= decoder->width;
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}
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}
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i += j;
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}
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if (i != count)
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printf("rle encoding longer than expected (%d expected %d)\n",
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i, count);
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decoder->p = p;
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}
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int
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wcap_decoder_get_frame(struct wcap_decoder *decoder)
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{
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struct wcap_rectangle *rects;
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struct wcap_frame_header *header;
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uint32_t i;
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if (decoder->p == decoder->end)
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return 0;
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header = decoder->p;
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decoder->msecs = header->msecs;
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decoder->count++;
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rects = (void *) (header + 1);
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decoder->p = (uint32_t *) (rects + header->nrects);
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for (i = 0; i < header->nrects; i++)
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wcap_decoder_decode_rectangle(decoder, &rects[i]);
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return 1;
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}
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struct wcap_decoder *
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wcap_decoder_create(const char *filename)
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{
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struct wcap_decoder *decoder;
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struct wcap_header *header;
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int frame_size;
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struct stat buf;
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decoder = malloc(sizeof *decoder);
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if (decoder == NULL)
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return NULL;
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decoder->fd = open(filename, O_RDONLY);
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if (decoder->fd == -1) {
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free(decoder);
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return NULL;
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}
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fstat(decoder->fd, &buf);
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decoder->size = buf.st_size;
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decoder->map = mmap(NULL, decoder->size,
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PROT_READ, MAP_PRIVATE, decoder->fd, 0);
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if (decoder->map == MAP_FAILED) {
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fprintf(stderr, "mmap failed\n");
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free(decoder);
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return NULL;
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}
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header = decoder->map;
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decoder->format = header->format;
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decoder->count = 0;
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decoder->width = header->width;
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decoder->height = header->height;
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decoder->p = header + 1;
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decoder->end = decoder->map + decoder->size;
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frame_size = header->width * header->height * 4;
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decoder->frame = malloc(frame_size);
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if (decoder->frame == NULL) {
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free(decoder);
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return NULL;
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}
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memset(decoder->frame, 0, frame_size);
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return decoder;
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}
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void
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wcap_decoder_destroy(struct wcap_decoder *decoder)
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{
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munmap(decoder->map, decoder->size);
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close(decoder->fd);
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free(decoder->frame);
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free(decoder);
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}
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