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/*
Copyright (C) 2001 Paul Davis
Copyright (C) 2002 Dave LaRose
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "hardware.h"
#include "alsa_driver.h"
#include "hdsp.h"
#include "internal.h"
/* Constants to make working with the hdsp matrix mixer easier */
static const int HDSP_MINUS_INFINITY_GAIN = 0;
static const int HDSP_UNITY_GAIN = 32768;
static const int HDSP_MAX_GAIN = 65535;
/*
* Use these two arrays to choose the value of the input_channel
* argument to hsdp_set_mixer_gain(). hdsp_physical_input_index[n]
* selects the nth optical/analog input. audio_stream_index[n]
* selects the nth channel being received from the host via pci/pccard.
*/
static const int hdsp_num_input_channels = 52;
static const int hdsp_physical_input_index[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25};
static const int hdsp_audio_stream_index[] = {
26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51};
/*
* Use this array to choose the value of the output_channel
* argument to hsdp_set_mixer_gain(). hdsp_physical_output_index[26]
* and hdsp_physical_output_index[27] refer to the two "line out"
* channels (1/4" phone jack on the front of digiface/multiface).
*/
static const int hdsp_num_output_channels = 28;
static const int hdsp_physical_output_index[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27};
/* Function for checking argument values */
static int clamp_int(int value, int lower_bound, int upper_bound)
{
if(value < lower_bound) {
return lower_bound;
}
if(value > upper_bound) {
return upper_bound;
}
return value;
}
/* Note(XXX): Maybe should share this code with hammerfall.c? */
static void
set_control_id (snd_ctl_elem_id_t *ctl, const char *name)
{
snd_ctl_elem_id_set_name (ctl, name);
snd_ctl_elem_id_set_numid (ctl, 0);
snd_ctl_elem_id_set_interface (ctl, SND_CTL_ELEM_IFACE_HWDEP);
snd_ctl_elem_id_set_device (ctl, 0);
snd_ctl_elem_id_set_subdevice (ctl, 0);
snd_ctl_elem_id_set_index (ctl, 0);
}
/* The hdsp matrix mixer lets you connect pretty much any input to */
/* any output with gain from -inf to about +2dB. Pretty slick. */
/* This routine makes a convenient way to set the gain from */
/* input_channel to output_channel (see hdsp_physical_input_index */
/* etc. above. */
/* gain is an int from 0 to 65535, with 0 being -inf gain, and */
/* 65535 being about +2dB. */
static int hdsp_set_mixer_gain(jack_hardware_t *hw, int input_channel,
int output_channel, int gain)
{
hdsp_t *h = (hdsp_t *) hw->private;
snd_ctl_elem_value_t *ctl;
snd_ctl_elem_id_t *ctl_id;
int err;
/* Check args */
input_channel = clamp_int(input_channel, 0, hdsp_num_input_channels);
output_channel = clamp_int(output_channel, 0, hdsp_num_output_channels);
gain = clamp_int(gain, HDSP_MINUS_INFINITY_GAIN, HDSP_MAX_GAIN);
/* Allocate control element and select "Mixer" control */
snd_ctl_elem_value_alloca (&ctl);
snd_ctl_elem_id_alloca (&ctl_id);
set_control_id (ctl_id, "Mixer");
snd_ctl_elem_value_set_id (ctl, ctl_id);
/* Apparently non-standard and unstable interface for the */
/* mixer control. */
snd_ctl_elem_value_set_integer (ctl, 0, input_channel);
snd_ctl_elem_value_set_integer (ctl, 1, output_channel);
snd_ctl_elem_value_set_integer (ctl, 2, gain);
/* Commit the mixer value and check for errors */
if ((err = snd_ctl_elem_write (h->driver->ctl_handle, ctl)) != 0) {
jack_error ("ALSA/HDSP: cannot set mixer gain (%s)", snd_strerror (err));
return -1;
}
/* Note (XXX): Perhaps we should maintain a cache of the current */
/* mixer values, since it's not clear how to query them from the */
/* hdsp hardware. We'll leave this out until a little later. */
return 0;
}
static int hdsp_set_input_monitor_mask (jack_hardware_t *hw, unsigned long mask)
{
int i;
/* For each input channel */
for (i = 0; i < 26; i++) {
/* Monitoring requested for this channel? */
if(mask & (1<<i)) {
/* Yes. Connect physical input to output */
if(hdsp_set_mixer_gain (hw, hdsp_physical_input_index[i],
hdsp_physical_output_index[i],
HDSP_UNITY_GAIN) != 0) {
return -1;
}
#ifdef CANNOT_HEAR_SOFTWARE_STREAM_WHEN_MONITORING
/* ...and disconnect the corresponding software */
/* channel */
if(hdsp_set_mixer_gain (hw, hdsp_audio_stream_index[i],
hdsp_physical_output_index[i],
HDSP_MINUS_INFINITY_GAIN) != 0) {
return -1;
}
#endif
} else {
/* No. Disconnect physical input from output */
if(hdsp_set_mixer_gain (hw, hdsp_physical_input_index[i],
hdsp_physical_output_index[i],
HDSP_MINUS_INFINITY_GAIN) != 0) {
return -1;
}
#ifdef CANNOT_HEAR_SOFTWARE_STREAM_WHEN_MONITORING
/* ...and connect the corresponding software */
/* channel */
if(hdsp_set_mixer_gain (hw, hdsp_audio_stream_index[i],
hdsp_physical_output_index[i],
HDSP_UNITY_GAIN) != 0) {
return -1;
}
#endif
}
}
/* Cache the monitor mask */
hw->input_monitor_mask = mask;
return 0;
}
static int hdsp_change_sample_clock (jack_hardware_t *hw, SampleClockMode mode)
{
// Empty for now, until Dave understands more about clock sync so
// he can test.
return -1;
}
static double hdsp_get_hardware_peak (jack_port_t *port, jack_nframes_t frame)
{
return 0;
}
static double hdsp_get_hardware_power (jack_port_t *port, jack_nframes_t frame)
{
return 0;
}
static void
hdsp_release (jack_hardware_t *hw)
{
hdsp_t *h = (hdsp_t *) hw->private;
if (h != 0) {
free (h);
}
}
/* Mostly copied directly from hammerfall.c */
jack_hardware_t *
jack_alsa_hdsp_hw_new (alsa_driver_t *driver)
{
jack_hardware_t *hw;
hdsp_t *h;
hw = (jack_hardware_t *) malloc (sizeof (jack_hardware_t));
/* Not using clock lock-sync-whatever in home hardware setup */
/* yet. Will write this code when can test it. */
/* hw->capabilities = Cap_HardwareMonitoring|Cap_AutoSync|Cap_WordClock|Cap_ClockMaster|Cap_ClockLockReporting; */
hw->capabilities = Cap_HardwareMonitoring | Cap_HardwareMetering;
hw->input_monitor_mask = 0;
hw->private = 0;
hw->set_input_monitor_mask = hdsp_set_input_monitor_mask;
hw->change_sample_clock = hdsp_change_sample_clock;
hw->release = hdsp_release;
hw->get_hardware_peak = hdsp_get_hardware_peak;
hw->get_hardware_power = hdsp_get_hardware_power;
h = (hdsp_t *) malloc (sizeof (hdsp_t));
h->driver = driver;
hw->private = h;
return hw;
}
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