lib/rbcodec/codecs/libfaad/README.rockbox


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Library: libfaad (FAAD2)
Imported: 2005-10-31 by Dave Chapman

This directory contains the libfaad library from the FAAD2 project.

LICENSING INFORMATION

FAAD2 is licensed under the GNU General Public License and is
Copyright (C) 2003 M. Bakker (mbakker(at)nero.com), Ahead Software AG

IMPORT DETAILS

The decoder is based on the CVS version of libfaad from 2 February 2005.

A non GPL compatible clause was added to the license as part of the
CVS commit on 2 February 2005 - so we are not able to use later
versions of that project in Rockbox.
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2007 Jonas Hurrelmann
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

/* Resizing test plugin. Loads /test.bmp (max 100x100) and displays a resized
 * version. Use the scrollwheel or the left/right keys to change the size of
 * the resizded version.
 */

#include "plugin.h"
#include "lib/pluginlib_actions.h"
#include "lib/pluginlib_bmp.h"


const struct button_mapping *plugin_contexts[]
= {pla_main_ctx};


/* Key assignement */
#define SIZE_INCREASE           PLA_UP
#define SIZE_INCREASE_REPEAT    PLA_UP_REPEAT
#define SIZE_DECREASE           PLA_DOWN
#define SIZE_DECREASE_REPEAT    PLA_DOWN_REPEAT

#define WIDTH_INCREASE           PLA_RIGHT
#define WIDTH_INCREASE_REPEAT    PLA_RIGHT_REPEAT
#define WIDTH_DECREASE           PLA_LEFT
#define WIDTH_DECREASE_REPEAT    PLA_LEFT_REPEAT

#define BUTTON_QUIT             PLA_EXIT
#define CHANGE_MODE             PLA_SELECT

#define MAX_OUTPUT_WIDTH    LCD_WIDTH
#define MAX_OUTPUT_HEIGHT   LCD_HEIGHT

static fb_data *b;

static struct bitmap input_bmp;
static struct bitmap output_bmp;

static fb_data input_bmp_data[200*200];
static fb_data output_bmp_data[MAX_OUTPUT_WIDTH*MAX_OUTPUT_HEIGHT];


/* this is the plugin entry point */
enum plugin_status plugin_start(const void* parameter)
{
    (void)parameter;

    b = rb->lcd_framebuffer;

    rb->lcd_set_background(LCD_RGBPACK(0,0,0));
    rb->lcd_clear_display(); // TODO: Optimizes this by e.g. invalidating rects

    input_bmp.data = (char*)input_bmp_data;
    output_bmp.data = (char*)output_bmp_data;

    int ret = rb->read_bmp_file("/test.bmp", &input_bmp, sizeof(input_bmp_data),
                                FORMAT_NATIVE, NULL);

    if (ret < 0) {
        rb->splash(HZ, "Could not load /test.bmp");
        return PLUGIN_ERROR;
    }

    int button;
    output_bmp.width = 50;
    output_bmp.height = 50;

    DEBUGF("input_bmp_data starts at %p\n", input_bmp_data);
    DEBUGF("output_bmp_data starts at %p\n", output_bmp_data);

    int scale_algorithm = 0;

    while(1) {
        rb->lcd_clear_display();
        rb->lcd_bitmap(input_bmp_data, 0, 0, input_bmp.width, input_bmp.height);

        switch ( scale_algorithm ) {
            case 0:
                smooth_resize_bitmap(&input_bmp, &output_bmp);
                rb->lcd_putsxy(0,0,"smooth_resize_bitmap");
                break;
            case 1:
                simple_resize_bitmap(&input_bmp, &output_bmp);
                rb->lcd_putsxy(0,0,"simple_resize_bitmap");
                break;
        }

        rb->lcd_bitmap(output_bmp_data, 0, 100, output_bmp.width,
                       output_bmp.height);

        rb->lcd_update();
        button = pluginlib_getaction(HZ, plugin_contexts,
                        ARRAYLEN(plugin_contexts));
        switch (button) {
            case BUTTON_QUIT:
                return PLUGIN_OK;
            case SIZE_INCREASE:
            case SIZE_INCREASE_REPEAT:
                if (output_bmp.width < MAX_OUTPUT_WIDTH - 2)
                    output_bmp.width += 2;
                if (output_bmp.height < MAX_OUTPUT_HEIGHT - 2)
                    output_bmp.height += 2;
                break;

            case SIZE_DECREASE:
            case SIZE_DECREASE_REPEAT:
                if (output_bmp.width > 2) output_bmp.width -= 2;
                if (output_bmp.height > 2) output_bmp.height -= 2;
                break;

            case WIDTH_INCREASE:
            case WIDTH_INCREASE_REPEAT:
                if (output_bmp.width < MAX_OUTPUT_WIDTH - 2)
                    output_bmp.width += 2;
                break;

            case WIDTH_DECREASE:
            case WIDTH_DECREASE_REPEAT:
                if (output_bmp.width > 2) output_bmp.width -= 2;
                break;

            case CHANGE_MODE:
                scale_algorithm = (scale_algorithm+1)%2;
                break;
        }
    }
    return PLUGIN_OK;
}