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/*
* This file is part of din.
*
* din is copyright (c) 2006 - 2012 S Jagannathan <jag@dinisnoise.org>
* For more information, please visit http://dinisnoise.org
*
* din 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.
*
* din 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 din. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __AUDIO
#define __AUDIO
#include <jack/jack.h>
#include <jack/midiport.h>
#include <jack/ringbuffer.h>
#include <vector>
#include "console.h"
typedef jack_default_audio_sample_t sample_t;
struct audio_out {
static int AUTO_CONNECT_OUTPUTS; // auto connect din to system audio outputs?
sample_t sample_rate;
static const int num_channels = 2;
int samples_per_buffer; // has 2 channels
int samples_channel_size, samples_buffer_size;
int samples_per_channel;
// written by the main thread
//
// a multi buffer scheme
//
// main thread writes a buffer, while audio thread streams another to audio card
//
sample_t * samples_buffers; // a bunch of sample buffers
int num_samples_buffers;
int* available; // buffer available for streaming?
sample_t *readp, *writep;
int readi, writei;
inline int can_write () {return !available [writei];}
// reuseable buffers
sample_t *result, *ams, *fms, *gatr, *vol; // result, AM & FM, gater, volume
//
// jack
//
jack_client_t *client;
// L and R connections
int lcons, rcons; // l and r connected?
jack_port_t *out_left, *out_right;
const char **con_left, **con_right;
// midi input
jack_port_t *midi_in;
jack_ringbuffer_t *midi_rb;
int num_midi_con;
// jack preferences
std::string prefs_name;
void load_prefs ();
void save_prefs ();
void defaults ();
audio_out ();
~audio_out ();
void alloc ();
int open ();
int close ();
int start ();
void set_callbacks ();
void set_sample_rate (int s);
void stream (float* lbuf, float* rbuf, float* sbuf);
static int audio_wanted (jack_nframes_t nsamples, void *arg);
};
int buffer_size_changed (jack_nframes_t nframes, void *arg);
int sample_rate_changed (jack_nframes_t nframes, void *arg);
void midi ();
void applyfx (float* out0, float* out1, int delay = 1, int compress = 1);
void update_audio ();
console& operator<< (console& c, const audio_out& ao);
void run_midi_cmd (const std::string& c, size_t length, jack_midi_data_t *buffer, std::vector<unsigned char>& args);
void connection_changed (jack_port_id_t a, jack_port_id_t b, int connect, void *arg);
#endif
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