static int event_process_midi(snd_seq_event_t * ev, int direct,
void *private_data, int atomic, int hop)
{
seq_midisynth_t *msynth = (seq_midisynth_t *) private_data;
unsigned char msg[10]; /* buffer for constructing midi messages */
snd_rawmidi_substream_t *substream;
int res;
snd_assert(msynth != NULL, return -EINVAL);
substream = msynth->output_rfile.output;
if (substream == NULL)
return -EINVAL;
if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { /* special case, to save space */
if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) {
/* invalid event */
snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags);
return 0;
}
res = snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream);
snd_midi_event_reset_decode(msynth->parser);
if (res < 0)
return res;
} else {
if (msynth->parser == NULL)
return -EIO;
res = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev);
if (res < 0)
return res;
if ((res = dump_midi(substream, msg, res)) < 0) {
snd_midi_event_reset_decode(msynth->parser);
return res;
}
}
return 0;
}
int snd_seq_expand_var_event(const snd_seq_event_t *event, int count, char *buf, int in_kernel, int size_aligned)
{
int len, newlen;
int err;
if ((len = get_var_len(event)) < 0)
return len;
newlen = len;
if (size_aligned > 0)
newlen = ((len + size_aligned - 1) / size_aligned) * size_aligned;
if (count < newlen)
return -EAGAIN;
if (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR) {
if (! in_kernel)
return -EINVAL;
if (copy_from_user(buf, event->data.ext.ptr, len))
return -EFAULT;
return newlen;
}
err = snd_seq_dump_var_event(event,
in_kernel ? (snd_seq_dump_func_t)seq_copy_in_kernel :
(snd_seq_dump_func_t)seq_copy_in_user,
&buf);
return err < 0 ? err : newlen;
}
static int event_process_midi(struct snd_seq_event *ev, int direct,
void *private_data, int atomic, int hop)
{
struct seq_midisynth *msynth = private_data;
unsigned char msg[10]; /* buffer for constructing midi messages */
struct snd_rawmidi_substream *substream;
int len;
if (snd_BUG_ON(!msynth))
return -EINVAL;
substream = msynth->output_rfile.output;
if (substream == NULL)
return -ENODEV;
if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { /* special case, to save space */
if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) {
/* invalid event */
snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags);
return 0;
}
snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream);
snd_midi_event_reset_decode(msynth->parser);
} else {
if (msynth->parser == NULL)
return -EIO;
len = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev);
if (len < 0)
return 0;
if (dump_midi(substream, msg, len) < 0)
snd_midi_event_reset_decode(msynth->parser);
}
return 0;
}