int main()
{
clear_screen();
copy_file(INPUT_FILE, OUTPUT_FILE);
write2console(OUTPUT_FILE);
write2printer(OUTPUT_FILE);
write2serial(OUTPUT_FILE);
truncate_file(OUTPUT_FILE);
write_midi();
wait_enter();
return 0;
}
static void snd_echo_midi_output_write(unsigned long data)
{
struct echoaudio *chip = (struct echoaudio *)data;
unsigned long flags;
int bytes, sent, time;
unsigned char buf[MIDI_OUT_BUFFER_SIZE - 1];
DE_MID(("snd_echo_midi_output_write\n"));
/* No interrupts are involved: we have to check at regular intervals
if the card's output buffer has room for new data. */
sent = bytes = 0;
spin_lock_irqsave(&chip->lock, flags);
chip->midi_full = 0;
if (!snd_rawmidi_transmit_empty(chip->midi_out)) {
bytes = snd_rawmidi_transmit_peek(chip->midi_out, buf,
MIDI_OUT_BUFFER_SIZE - 1);
DE_MID(("Try to send %d bytes...\n", bytes));
sent = write_midi(chip, buf, bytes);
if (sent < 0) {
dev_err(chip->card->dev,
"write_midi() error %d\n", sent);
/* retry later */
sent = 9000;
chip->midi_full = 1;
} else if (sent > 0) {
DE_MID(("%d bytes sent\n", sent));
snd_rawmidi_transmit_ack(chip->midi_out, sent);
} else {
/* Buffer is full. DSP's internal buffer is 64 (128 ?)
bytes long. Let's wait until half of them are sent */
DE_MID(("Full\n"));
sent = 32;
chip->midi_full = 1;
}
}
/* We restart the timer only if there is some data left to send */
if (!snd_rawmidi_transmit_empty(chip->midi_out) && chip->tinuse) {
/* The timer will expire slightly after the data has been
sent */
time = (sent << 3) / 25 + 1; /* 8/25=0.32ms to send a byte */
mod_timer(&chip->timer, jiffies + (time * HZ + 999) / 1000);
DE_MID(("Timer armed(%d)\n", ((time * HZ + 999) / 1000)));
}
spin_unlock_irqrestore(&chip->lock, flags);
}
