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120 lines
3.4 KiB
120 lines
3.4 KiB
4 years ago
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/*
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* imgconvert.c - image format conversion routines
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* Written by Andrew Church <achurch@achurch.org>
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*
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* This file is part of transcode, a video stream processing tool.
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* transcode is free software, distributable under the terms of the GNU
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* General Public License (version 2 or later). See the file COPYING
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* for details.
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*/
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#include "ac.h"
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#include "imgconvert.h"
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#include "img_internal.h"
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#include <stdio.h>
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#include <stdlib.h>
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/*************************************************************************/
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static struct {
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ImageFormat srcfmt, destfmt;
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ConversionFunc func;
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} *conversions;
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static int n_conversions = 0;
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/*************************************************************************/
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/*************************************************************************/
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/* Image conversion routine. src and dest are arrays of pointers to planes
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* (for packed formats with only one plane, just use `&data'); srcfmt and
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* destfmt specify the source and destination image formats (IMG_*).
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* width and height are in pixels. Returns 1 on success, 0 on failure. */
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int ac_imgconvert(uint8_t **src, ImageFormat srcfmt,
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uint8_t **dest, ImageFormat destfmt,
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int width, int height)
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{
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int i;
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/* Hack to handle YV12 easily, because conversion routines don't get
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* format tags */
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uint8_t *newsrc[3], *newdest[3];
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if (srcfmt == IMG_YV12) {
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srcfmt = IMG_YUV420P;
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newsrc[0] = src[0];
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newsrc[1] = src[2];
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newsrc[2] = src[1];
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src = newsrc;
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}
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if (destfmt == IMG_YV12) {
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destfmt = IMG_YUV420P;
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newdest[0] = dest[0];
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newdest[1] = dest[2];
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newdest[2] = dest[1];
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dest = newdest;
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}
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for (i = 0; i < n_conversions; i++) {
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if (conversions[i].srcfmt==srcfmt && conversions[i].destfmt==destfmt)
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return (*conversions[i].func)(src, dest, width, height);
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}
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return 0;
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}
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/*************************************************************************/
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/*************************************************************************/
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/* Internal use only! */
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int ac_imgconvert_init(int accel)
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{
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if (!ac_imgconvert_init_yuv_planar(accel)
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|| !ac_imgconvert_init_yuv_packed(accel)
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|| !ac_imgconvert_init_yuv_mixed(accel)
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|| !ac_imgconvert_init_yuv_rgb(accel)
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|| !ac_imgconvert_init_rgb_packed(accel)
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) {
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fprintf(stderr, "ac_imgconvert_init() failed");
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return 0;
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}
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return 1;
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}
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int register_conversion(ImageFormat srcfmt, ImageFormat destfmt,
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ConversionFunc function)
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{
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int i;
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for (i = 0; i < n_conversions; i++) {
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if (conversions[i].srcfmt==srcfmt && conversions[i].destfmt==destfmt) {
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conversions[i].func = function;
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return 1;
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}
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}
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if (!(conversions = realloc(conversions,
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(n_conversions+1) * sizeof(*conversions)))) {
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fprintf(stderr, "register_conversion(): out of memory\n");
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return 0;
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}
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conversions[n_conversions].srcfmt = srcfmt;
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conversions[n_conversions].destfmt = destfmt;
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conversions[n_conversions].func = function;
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n_conversions++;
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return 1;
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}
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/*************************************************************************/
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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