mirrors/alsa-tools
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-tools.git synced 2025-10-29 05:40:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

envy24control: midi support for mixer

Browse source 
Hello devlopers,

I have made the mixer sliders in envy24control react to MIDI
controllers. This way the hardware mixer can be controlled from a
sequencer program or some external MIDI controller hardware.

envy24control became a standard ALSA sequencer client which you can
connect to arbitrary other MIDI sources/sinks.

Signed-off-by: Dirk Jagdmann <doj@cubic.org>
This commit is contained in:
Dirk Jagdmann 2004-11-17 11:41:56 +00:00 • committed by Takashi Iwai
parent 465acb88f4
commit 1be230856c
6 changed files with 269 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

7
envy24control/mixer.c
View file

@ -18,6 +18,7 @@
******************************************************************************/
#include "envy24control.h"
#include "midi.h"
#define MULTI_PLAYBACK_SWITCH "Multi Playback Switch"
#define MULTI_PLAYBACK_VOLUME "Multi Playback Volume"
@ -62,6 +63,8 @@ void mixer_update_stream(int stream, int vol_flag, int sw_flag)
toggle_set(mixer_stereo_toggle[stream-1], FALSE);
gtk_adjustment_set_value(GTK_ADJUSTMENT(mixer_adj[stream-1][0]), 96 - v[0]);
gtk_adjustment_set_value(GTK_ADJUSTMENT(mixer_adj[stream-1][1]), 96 - v[1]);
midi_controller(stream*2-1, v[0]);
midi_controller(stream*2, v[1]);
}
if (sw_flag) {
snd_ctl_elem_value_t *sw;
@ -139,10 +142,12 @@ static void set_volume1(int stream, int left, int right)
if (left >= 0) {
change |= (snd_ctl_elem_value_get_integer(vol, 0) != left);
snd_ctl_elem_value_set_integer(vol, 0, left);
midi_controller(stream*2-1, left);
}
if (right >= 0) {
change |= (snd_ctl_elem_value_get_integer(vol, 1) != right);
snd_ctl_elem_value_set_integer(vol, 1, right);
midi_controller(stream*2, right);
}
if (change) {
if ((err = snd_ctl_elem_write(ctl, vol)) < 0 && err != -EBUSY)
@ -176,6 +181,8 @@ void mixer_init(void)
int nb_active_channels;
snd_ctl_elem_value_t *val;
midi_maxstreams(sizeof(stream_is_active)/sizeof(stream_is_active[0]));
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_interface(val, SND_CTL_ELEM_IFACE_MIXER);
memset (stream_is_active, 0, (MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS + MAX_SPDIF_CHANNELS) * sizeof(int));