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714 user890104 1 
//
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//
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//    Copyright 2011 TheSeven, user890104
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//
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//
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//    This file is part of emCORE.
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//
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//    emCORE is free software: you can redistribute it and/or
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//    modify it under the terms of the GNU General Public License as
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//    published by the Free Software Foundation, either version 2 of the
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//    License, or (at your option) any later version.
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//
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//    emCORE 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.
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//    See the GNU General Public License for more details.
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//
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//    You should have received a copy of the GNU General Public License along
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//    with emCORE.  If not, see <http://www.gnu.org/licenses/>.
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//
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//
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#include "emcoreapp.h"
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#include "beep.h"
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void playsong(void *buf, size_t size);
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static void main()
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{
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    if (0x47324e49 != get_platform_id()) // IN2G
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    {
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        cputs(3, "Your device is not supported!\n");
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        return;
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    }
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    size_t size;
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    int fd;
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    void *buf;
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    unsigned char play;
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    play = 0;
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    fd = file_open("/song.dat", O_RDONLY);
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    if (fd <= 0)
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    {
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        cputs(3, "Unable to open /song.dat!\n");
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        return;
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    }
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    cputs(3, "File opened\n");
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    size = filesize(fd);
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    if (size <= 0)
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    {
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        close(fd);
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        cputs(3, "Unable to get file size or file is empty!\n");
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        return;
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    }
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    cprintf(3, "File size: %d bytes\n", size);
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    if (0 != size % 8)
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    {
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        close(fd);
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        cputs(3, "Invalid file, unable to continue!\n");
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        return;
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    }
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    buf = memalign(0x10, size);
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    if (!buf)
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    {
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        close(fd);
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        cputs(3, "Memory allocation failed!\n");
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        return;
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    }
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    if (size != read(fd, buf, size))
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    {
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        free(buf);
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        close(fd);
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        cputs(3, "Read error!\n");
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        return;
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    }
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    cputs(3, "Read successful\n");
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    close(fd);
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    cputs(3, "File closed\n");
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    playsong(buf, size);
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    free(buf);
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}
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void playsong(void *buf, size_t size) {
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    int i;
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    unsigned int cycles[size / 8], lengths[size / 8];
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    for (i = 0; i < size / 8; ++i)
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    {
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        cycles[i] = *((unsigned int *)(buf) + i + i);
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        lengths[i] = *((unsigned int *)(buf) + i + i + 1);
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    }
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    for (i = 0; i < size / 8; ++i)
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    {
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        if (0 == cycles[i])
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        {
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            sleep(lengths[i]);
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            continue;
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        }
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        singlebeep(cycles[i], lengths[i]);
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    }
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}
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EMCORE_APP_HEADER("Beeper", main, 127)