static int
vtx_read (DB_fileinfo_t *_info, char *bytes, int size) {
// try decode `size' bytes
// return number of decoded bytes
// return 0 on EOF
vtx_info_t *info = (vtx_info_t *)_info;
int initsize = size;
int donow = 0;
while (size > 0) {
if (info->left > 0) {
donow = (size > info->left) ? info->left : size;
info->left -= donow;
bytes = ayemu_gen_sound (&info->ay, (char *)bytes, donow);
size -= donow;
}
else {
if ((ayemu_vtx_get_next_frame (info) == 0)) {
break; // eof
}
else {
// number of samples it current frame
info->left = _info->fmt.samplerate / info->decoder->playerFreq;
// mul by rate to get number of bytes;
info->left *= info->rate;
ayemu_set_regs (&info->ay, info->regs);
donow = 0;
}
}
}
info->currentsample += (initsize - size) / 4;
_info->readpos = (float)info->currentsample / _info->fmt.samplerate;
return initsize - size;
}
void play (const char *filename)
{
ayemu_vtx_t *vtx;
int len;
vtx = ayemu_vtx_load_from_file(filename);
if (!vtx) return;
if (!qflag)
printf(" Title: %s\n Author: %s\n From: %s\n Comment: %s\n Year: %d\n",
vtx->title, vtx->author, vtx->from, vtx->comment, vtx->year);
int audio_bufsize = freq * chans * (bits >> 3) / vtx->playerFreq;
if ((audio_buf = malloc (audio_bufsize)) == NULL) {
fprintf (stderr, "Can't allocate sound buffer\n");
goto free_vtx;
}
ayemu_reset(&ay);
ayemu_set_chip_type(&ay, vtx->chiptype, NULL);
ayemu_set_chip_freq(&ay, vtx->chipFreq);
ayemu_set_stereo(&ay, vtx->stereo, NULL);
size_t pos = 0;
while (pos++ < vtx->frames) {
ayemu_vtx_getframe (vtx, pos, regs);
ayemu_set_regs (&ay, regs);
ayemu_gen_sound (&ay, audio_buf, audio_bufsize);
if ((len = write(audio_fd, audio_buf, audio_bufsize)) == -1) {
fprintf (stderr, "Error writting to sound device, break.\n");
break;
}
}
free_vtx:
ayemu_vtx_free(vtx);
}
static gboolean vtx_play(InputPlayback * playback, const gchar * filename,
VFSFile * file, gint start_time, gint stop_time, gboolean pause)
{
gboolean error = FALSE;
gboolean eof = FALSE;
void *stream; /* pointer to current position in sound buffer */
guchar regs[14];
gint need;
gint left; /* how many sound frames can play with current AY register frame */
gint donow;
gint rate;
left = 0;
rate = chans * (bits / 8);
memset(&ay, 0, sizeof(ay));
if (!ayemu_vtx_open(&vtx, filename))
{
g_print("libvtx: Error read vtx header from %s\n", filename);
error = TRUE;
goto ERR_NO_CLOSE;
}
else if (!ayemu_vtx_load_data(&vtx))
{
g_print("libvtx: Error read vtx data from %s\n", filename);
error = TRUE;
goto ERR_NO_CLOSE;
}
ayemu_init(&ay);
ayemu_set_chip_type(&ay, vtx.hdr.chiptype, NULL);
ayemu_set_chip_freq(&ay, vtx.hdr.chipFreq);
ayemu_set_stereo(&ay, vtx.hdr.stereo, NULL);
if (playback->output->open_audio(FMT_S16_NE, freq, chans) == 0)
{
g_print("libvtx: output audio error!\n");
error = TRUE;
goto ERR_NO_CLOSE;
}
if (pause)
playback->output->pause (TRUE);
stop_flag = FALSE;
playback->set_params(playback, 14 * 50 * 8, freq, bits / 8);
playback->set_pb_ready(playback);
while (!stop_flag)
{
g_mutex_lock(seek_mutex);
if (seek_value >= 0)
{
vtx.pos = seek_value * 50 / 1000; /* (time in sec) * 50 = offset in AY register data frames */
playback->output->flush(seek_value);
seek_value = -1;
g_cond_signal(seek_cond);
}
g_mutex_unlock(seek_mutex);
/* fill sound buffer */
stream = sndbuf;
for (need = SNDBUFSIZE / rate; need > 0; need -= donow)
if (left > 0)
{ /* use current AY register frame */
donow = (need > left) ? left : need;
left -= donow;
stream = ayemu_gen_sound(&ay, (char *)stream, donow * rate);
}
else
{ /* get next AY register frame */
if (ayemu_vtx_get_next_frame(&vtx, (char *)regs) == 0)
{
donow = need;
memset(stream, 0, donow * rate);
eof = TRUE;
}
else
{
left = freq / vtx.hdr.playerFreq;
ayemu_set_regs(&ay, regs);
donow = 0;
}
}
if (!stop_flag)
playback->output->write_audio(sndbuf, SNDBUFSIZE);
if (eof)
{
AUDDBG("EOF.\n");
while (!stop_flag && playback->output->buffer_playing())
g_usleep(10000);
goto CLEANUP;
}
}
CLEANUP:
ayemu_vtx_free(&vtx);
g_mutex_lock(seek_mutex);
stop_flag = TRUE;
g_cond_signal(seek_cond); /* wake up any waiting request */
g_mutex_unlock(seek_mutex);
playback->output->close_audio();
ERR_NO_CLOSE:
return !error;
}
static gboolean vtx_play(const gchar * filename, VFSFile * file)
{
gboolean eof = FALSE;
void *stream; /* pointer to current position in sound buffer */
guchar regs[14];
gint need;
gint left; /* how many sound frames can play with current AY register frame */
gint donow;
gint rate;
left = 0;
rate = chans * (bits / 8);
memset(&ay, 0, sizeof(ay));
if (!ayemu_vtx_open(&vtx, filename))
{
g_print("libvtx: Error read vtx header from %s\n", filename);
return FALSE;
}
else if (!ayemu_vtx_load_data(&vtx))
{
g_print("libvtx: Error read vtx data from %s\n", filename);
return FALSE;
}
ayemu_init(&ay);
ayemu_set_chip_type(&ay, vtx.hdr.chiptype, NULL);
ayemu_set_chip_freq(&ay, vtx.hdr.chipFreq);
ayemu_set_stereo(&ay, vtx.hdr.stereo, NULL);
if (aud_input_open_audio(FMT_S16_NE, freq, chans) == 0)
{
g_print("libvtx: output audio error!\n");
return FALSE;
}
aud_input_set_bitrate(14 * 50 * 8);
while (!aud_input_check_stop() && !eof)
{
/* (time in sec) * 50 = offset in AY register data frames */
int seek_value = aud_input_check_seek();
if (seek_value >= 0)
vtx.pos = seek_value / 20;
/* fill sound buffer */
stream = sndbuf;
for (need = SNDBUFSIZE / rate; need > 0; need -= donow)
{
if (left > 0)
{ /* use current AY register frame */
donow = (need > left) ? left : need;
left -= donow;
stream = ayemu_gen_sound(&ay, (char *)stream, donow * rate);
}
else
{ /* get next AY register frame */
if (ayemu_vtx_get_next_frame(&vtx, (char *)regs) == 0)
{
donow = need;
memset(stream, 0, donow * rate);
eof = TRUE;
}
else
{
left = freq / vtx.hdr.playerFreq;
ayemu_set_regs(&ay, regs);
donow = 0;
}
}
}
aud_input_write_audio(sndbuf, SNDBUFSIZE);
}
ayemu_vtx_free(&vtx);
return TRUE;
}