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mixer.c

/*****************************************************************************
   mixer.c - mixer code
   Copyright (C) 2000 by Jaroslav Kysela <perex@suse.cz>
   
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
******************************************************************************/

#include "envy24control.h"
#include "midi.h"
#include "config.h"

#define     MULTI_PLAYBACK_SWITCH         "Multi Playback Switch"
#define MULTI_PLAYBACK_VOLUME       "Multi Playback Volume"

#define HW_MULTI_CAPTURE_SWITCH           "H/W Multi Capture Switch"
#define IEC958_MULTI_CAPTURE_SWITCH "IEC958 Multi Capture Switch"

#define HW_MULTI_CAPTURE_VOLUME           "H/W Multi Capture Volume"
#define IEC958_MULTI_CAPTURE_VOLUME "IEC958 Multi Capture Volume"

#define toggle_set(widget, state) \
      gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(widget), state);

static int stream_is_active[MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + \
                        MAX_INPUT_CHANNELS + MAX_SPDIF_CHANNELS];
extern int input_channels, output_channels, pcm_output_channels, spdif_channels, view_spdif_playback;

static int is_active(GtkWidget *widget)
{
      return GTK_TOGGLE_BUTTON(widget)->active ? 1 : 0;
}

void mixer_update_stream(int stream, int vol_flag, int sw_flag)
{
      int err;
      
      if (! stream_is_active[stream - 1])
            return;

      if (vol_flag) {
            snd_ctl_elem_value_t *vol;
            int v[2];
            snd_ctl_elem_value_alloca(&vol);
            snd_ctl_elem_value_set_interface(vol, SND_CTL_ELEM_IFACE_MIXER);
            snd_ctl_elem_value_set_name(vol, stream <= 10 ? MULTI_PLAYBACK_VOLUME : (stream <= 18 ? HW_MULTI_CAPTURE_VOLUME : IEC958_MULTI_CAPTURE_VOLUME));
            snd_ctl_elem_value_set_index(vol, stream <= 18 ? (stream - 1) % 10 : (stream - 1) % 18 );
            if ((err = snd_ctl_elem_read(ctl, vol)) < 0)
                  g_print("Unable to read multi playback volume: %s\n", snd_strerror(err));
            v[0] = snd_ctl_elem_value_get_integer(vol, 0);
            v[1] = snd_ctl_elem_value_get_integer(vol, 1);
            if (v[0] != v[1])
                  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-1)*2,   v[0]);
            midi_controller((stream-1)*2+1, v[1]);
      }
      if (sw_flag) {
            snd_ctl_elem_value_t *sw;
            int v[2];
            snd_ctl_elem_value_alloca(&sw);
            snd_ctl_elem_value_set_interface(sw, SND_CTL_ELEM_IFACE_MIXER);
            snd_ctl_elem_value_set_name(sw, stream <= 10 ? MULTI_PLAYBACK_SWITCH : (stream <= 18 ? HW_MULTI_CAPTURE_SWITCH : IEC958_MULTI_CAPTURE_SWITCH));
            snd_ctl_elem_value_set_index(sw, stream <= 18 ? (stream - 1) % 10 : (stream - 1) % 18 );
            if ((err = snd_ctl_elem_read(ctl, sw)) < 0)
                  g_print("Unable to read multi playback switch: %s\n", snd_strerror(err));
            v[0] = snd_ctl_elem_value_get_boolean(sw, 0);
            v[1] = snd_ctl_elem_value_get_boolean(sw, 1);
            if (v[0] != v[1])
                  toggle_set(mixer_stereo_toggle[stream-1], FALSE);
            toggle_set(mixer_mute_toggle[stream-1][0], !v[0] ? TRUE : FALSE);
            toggle_set(mixer_mute_toggle[stream-1][1], !v[1] ? TRUE : FALSE);
            midi_button((stream-1)*2, v[0]);
            midi_button((stream-1)*2+1, v[1]);
      }
}

static void set_switch1(int stream, int left, int right)
{
      snd_ctl_elem_value_t *sw;
      int err, changed = 0;
      
      snd_ctl_elem_value_alloca(&sw);
      snd_ctl_elem_value_set_interface(sw, SND_CTL_ELEM_IFACE_MIXER);
      snd_ctl_elem_value_set_name(sw, stream <= 10 ? MULTI_PLAYBACK_SWITCH : (stream <= 18 ? HW_MULTI_CAPTURE_SWITCH : IEC958_MULTI_CAPTURE_SWITCH));
      snd_ctl_elem_value_set_index(sw, stream <= 18 ? (stream - 1) % 10 : (stream - 1) % 18 );
      if ((err = snd_ctl_elem_read(ctl, sw)) < 0)
            g_print("Unable to read multi switch: %s\n", snd_strerror(err));
      if (left >= 0 && left != snd_ctl_elem_value_get_boolean(sw, 0)) {
            snd_ctl_elem_value_set_boolean(sw, 0, left);
            changed = 1;
            midi_button((stream-1)*2, left);
      }
      if (right >= 0 && right != snd_ctl_elem_value_get_boolean(sw, 1)) {
            snd_ctl_elem_value_set_boolean(sw, 1, right);
            changed = 1;
            midi_button((stream-1)*2+1, right);
      }
      if (changed) {
            err = snd_ctl_elem_write(ctl, sw);
            if (err < 0)
                  g_print("Unable to write multi switch: %s\n", snd_strerror(err));
      }
}

void mixer_toggled_mute(GtkWidget *togglebutton, gpointer data)
{
      int stream = (long)data >> 16;
      int button = (long)data & 1;
      int stereo = is_active(mixer_stereo_toggle[stream-1]) ? 1 : 0;
      int mute;
      int vol[2] = { -1, -1 };
      
      mute = is_active(mixer_mute_toggle[stream-1][button]);
      vol[button] = !mute;
      if (stereo) {
            toggle_set(mixer_mute_toggle[stream-1][button^1], mute);
            vol[button^1] = !mute;
      }
      set_switch1(stream, vol[0], vol[1]);
}

void mixer_set_mute(int stream, int left, int right)
{
      int stereo = is_active(mixer_stereo_toggle[stream-1]) ? 1 : 0;
      if (left >= 0 || stereo) {
            toggle_set(mixer_mute_toggle[stream-1][0], left ? TRUE : FALSE);
            if(stereo && left<0) left=right;
      }
      if (right >= 0 || stereo) {
            toggle_set(mixer_mute_toggle[stream-1][1], right ? TRUE : FALSE);
            if(stereo && right<0) right=left;
      }
      set_switch1(stream, left, right);
}

static void set_volume1(int stream, int left, int right)
{
      snd_ctl_elem_value_t *vol;
      int change = 0;
      int err;
      
      snd_ctl_elem_value_alloca(&vol);
      snd_ctl_elem_value_set_interface(vol, SND_CTL_ELEM_IFACE_MIXER);
      snd_ctl_elem_value_set_name(vol, stream <= 10 ? MULTI_PLAYBACK_VOLUME : (stream <= 18 ? HW_MULTI_CAPTURE_VOLUME : IEC958_MULTI_CAPTURE_VOLUME));
      snd_ctl_elem_value_set_index(vol, stream <= 18 ? (stream - 1) % 10 : (stream - 1) % 18 );
      if ((err = snd_ctl_elem_read(ctl, vol)) < 0)
            g_print("Unable to read multi volume: %s\n", snd_strerror(err));
      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-1)*2, 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-1)*2+1, right);
      }
      if (change) {
            if ((err = snd_ctl_elem_write(ctl, vol)) < 0 && err != -EBUSY)
                  g_print("Unable to write multi volume: %s\n", snd_strerror(err));
      }
}

void mixer_adjust(GtkAdjustment *adj, gpointer data)
{
      int stream = (long)data >> 16;
      int button = (long)data & 1;
      int stereo = is_active(mixer_stereo_toggle[stream-1]) ? 1 : 0;
      int vol[2] = { -1, -1 };
      
      vol[button] = 96 - adj->value;
      if (stereo) {
            gtk_adjustment_set_value(GTK_ADJUSTMENT(mixer_adj[stream-1][button ^ 1]), adj->value);
            vol[button ^ 1] = 96 - adj->value;
      }
      set_volume1(stream, vol[0], vol[1]);
}

int mixer_stream_is_active(int stream)
{
      return stream_is_active[stream - 1];
}

void mixer_init(void)
{
      int i;
      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));
      snd_ctl_elem_value_set_name(val, MULTI_PLAYBACK_SWITCH);
      nb_active_channels = 0;
      for (i = 0; i < pcm_output_channels; i++) {
            snd_ctl_elem_value_set_numid(val, 0);
            snd_ctl_elem_value_set_index(val, i);
            if (snd_ctl_elem_read(ctl, val) < 0)
                  continue;

            stream_is_active[i] = 1;
            nb_active_channels++;
      }
      pcm_output_channels = nb_active_channels;
      for (i = MAX_PCM_OUTPUT_CHANNELS; i < MAX_PCM_OUTPUT_CHANNELS + spdif_channels; i++) {
            snd_ctl_elem_value_set_numid(val, 0);
            snd_ctl_elem_value_set_index(val, i);
            if (snd_ctl_elem_read(ctl, val) < 0)
                  continue;
            stream_is_active[i] = 1;
      }
      snd_ctl_elem_value_set_name(val, HW_MULTI_CAPTURE_SWITCH);
      nb_active_channels = 0;
      for (i = 0; i < input_channels; i++) {
            snd_ctl_elem_value_set_numid(val, 0);
            snd_ctl_elem_value_set_index(val, i);
            if (snd_ctl_elem_read(ctl, val) < 0)
                  continue;

            stream_is_active[i + MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS] = 1;
            nb_active_channels++;
      }
      input_channels = nb_active_channels;
      snd_ctl_elem_value_set_name(val, IEC958_MULTI_CAPTURE_SWITCH);
      for (i = 0; i < spdif_channels; i++) {
            snd_ctl_elem_value_set_numid(val, 0);
            snd_ctl_elem_value_set_index(val, i);
            if (snd_ctl_elem_read(ctl, val) < 0)
                  continue;
            stream_is_active[i + MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS] = 1;
      }
}

void mixer_postinit(void)
{
      int stream;

      for (stream = 1; stream <= pcm_output_channels; stream++) {
            if (stream_is_active[stream - 1])
                  mixer_update_stream(stream, 1, 1);
      }
      for (stream = MAX_PCM_OUTPUT_CHANNELS + 1; \
            stream <= MAX_PCM_OUTPUT_CHANNELS + spdif_channels; stream++) {
            if (stream_is_active[stream - 1] && view_spdif_playback)
                  mixer_update_stream(stream, 1, 1);
      }
      for (stream = MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + 1; \
            stream <= MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + input_channels; stream++) {
            if (stream_is_active[stream - 1])
                  mixer_update_stream(stream, 1, 1);
      }
      for (stream = MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS + 1; \
            stream <= MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS + spdif_channels; stream++) {
            if (stream_is_active[stream - 1])
                  mixer_update_stream(stream, 1, 1);
      }

      config_restore_stereo();
}

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