Ejemplos de snd_rawmidi_input_params en C++ (Cpp)

Ejemplo n.º 1

/* open associated midi device for input */
static int midisynth_subscribe(void *private_data, struct snd_seq_port_subscribe *info)
{
    int err;
    struct seq_midisynth *msynth = private_data;
    struct snd_rawmidi_runtime *runtime;
    struct snd_rawmidi_params params;

    /* open midi port */
    if ((err = snd_rawmidi_kernel_open(msynth->card, msynth->device,
                                       msynth->subdevice,
                                       SNDRV_RAWMIDI_LFLG_INPUT,
                                       &msynth->input_rfile)) < 0) {
        pr_debug("ALSA: seq_midi: midi input open failed!!!\n");
        return err;
    }
    runtime = msynth->input_rfile.input->runtime;
    memset(&params, 0, sizeof(params));
    params.avail_min = 1;
    params.buffer_size = input_buffer_size;
    if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, &params)) < 0) {
        snd_rawmidi_kernel_release(&msynth->input_rfile);
        return err;
    }
    snd_midi_event_reset_encode(msynth->parser);
    runtime->event = snd_midi_input_event;
    runtime->private_data = msynth;
    snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0);
    return 0;
}

Ejemplo n.º 2

Archivo: seq_midi.c Proyecto: OS2World/DRV-UNIAUD

/* open associated midi device for input */
static int midisynth_subscribe(void *private_data, snd_seq_port_subscribe_t *info)
{
	int err;
	seq_midisynth_t *msynth = (seq_midisynth_t *)private_data;
	snd_rawmidi_runtime_t *runtime;
	snd_rawmidi_params_t params;

	/* open midi port */
	if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_INPUT, &msynth->input_rfile)) < 0) {
		snd_printd("midi input open failed!!!\n");
		return err;
	}
	runtime = msynth->input_rfile.input->runtime;
	memset(&params, 0, sizeof(params));
	params.avail_min = 1;
	params.buffer_size = input_buffer_size;
	if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, &params)) < 0) {
		snd_rawmidi_kernel_release(&msynth->input_rfile);
		return err;
	}
	runtime->event = snd_midi_input_event;
	runtime->private_data = msynth;
	snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0);
	return 0;
}

Ejemplo n.º 3

Archivo: rawmidi_compat.c Proyecto: 020gzh/linux

static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
					   struct snd_rawmidi_params32 __user *src)
{
	struct snd_rawmidi_params params;
	unsigned int val;

	if (rfile->output == NULL)
		return -EINVAL;
	if (get_user(params.stream, &src->stream) ||
	    get_user(params.buffer_size, &src->buffer_size) ||
	    get_user(params.avail_min, &src->avail_min) ||
	    get_user(val, &src->no_active_sensing))
		return -EFAULT;
	params.no_active_sensing = val;
	switch (params.stream) {
	case SNDRV_RAWMIDI_STREAM_OUTPUT:
		return snd_rawmidi_output_params(rfile->output, &params);
	case SNDRV_RAWMIDI_STREAM_INPUT:
		return snd_rawmidi_input_params(rfile->input, &params);
	}
	return -EINVAL;
}