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// ------------------------------------------------------------------------
// audioio-mikmod.cpp: Interface class for MikMod input. Uses FIFO pipes.
// Copyright (C) 1999-2000,2004-2006,2008,2009 Kai Vehmanen
//
// 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 <string>
#include <unistd.h> /* stat() */
#include <sys/stat.h> /* stat() */
#include <kvu_numtostr.h>
#include "audioio-mikmod.h"
#include "eca-logger.h"
using namespace std;
string MIKMOD_INTERFACE::default_mikmod_cmd = "mikmod -d stdout -o 16s -q -f %s -p 0 --noloops %f";
void MIKMOD_INTERFACE::set_mikmod_cmd(const std::string& value)
{
MIKMOD_INTERFACE::default_mikmod_cmd = value;
}
MIKMOD_INTERFACE::MIKMOD_INTERFACE(const std::string& name)
: triggered_rep(false),
finished_rep(false)
{
}
MIKMOD_INTERFACE::~MIKMOD_INTERFACE(void)
{
clean_child(true);
if (is_open() == true) {
close();
}
}
void MIKMOD_INTERFACE::open(void) throw (AUDIO_IO::SETUP_ERROR &)
{
std::string urlprefix;
triggered_rep = false;
finished_rep = false;
string real_filename = label();
if (real_filename == "mikmod") {
real_filename = opt_filename_rep;
}
struct stat buf;
int ret = ::stat(real_filename.c_str(), &buf);
if (ret != 0) {
size_t offset = real_filename.find_first_of("://");
if (offset == std::string::npos) {
throw(SETUP_ERROR(SETUP_ERROR::io_mode, "AUDIOIO-MIKMOD: Can't open file " + real_filename + "."));
}
else {
urlprefix = std::string(real_filename, 0, offset);
ECA_LOG_MSG(ECA_LOGGER::user_objects, "(audioio-mikmod) Found url; protocol '" + urlprefix + "'.");
}
}
/* decoder supports: s16 samples, 2 channels, srate configurable
no support for: endianess (use native) */
set_sample_format(ECA_AUDIO_FORMAT::sfmt_s16);
set_channels(2);
AUDIO_IO::open();
}
void MIKMOD_INTERFACE::close(void)
{
if (pid_of_child() > 0) {
if (io_mode() == io_read) {
kill_mikmod();
}
}
AUDIO_IO::close();
}
long int MIKMOD_INTERFACE::read_samples(void* target_buffer, long int samples)
{
if (triggered_rep != true) {
ECA_LOG_MSG(ECA_LOGGER::info, "WARNING: triggering an external program in real-time context");
triggered_rep = true;
fork_mikmod();
}
bytes_read_rep = ::fread(target_buffer, 1, frame_size() * samples, f1_rep);
if (bytes_read_rep < samples * frame_size() || bytes_read_rep == 0) {
if (position_in_samples() == 0)
ECA_LOG_MSG(ECA_LOGGER::info, "(audioio-mikmod) Can't start process \"" + MIKMOD_INTERFACE::default_mikmod_cmd + "\". Please check your ~/.ecasound/ecasoundrc.");
finished_rep = true;
triggered_rep = false;
}
else finished_rep = false;
return(bytes_read_rep / frame_size());
}
void MIKMOD_INTERFACE::kill_mikmod(void)
{
ECA_LOG_MSG(ECA_LOGGER::user_objects, "(audioio-mikmod) Cleaning mikmod-child with pid " + kvu_numtostr(pid_of_child()) + ".");
clean_child();
triggered_rep = false;
}
void MIKMOD_INTERFACE::fork_mikmod(void)
{
string real_filename = label();
if (real_filename == "mikmod") {
real_filename = opt_filename_rep;
}
set_fork_command(MIKMOD_INTERFACE::default_mikmod_cmd);
set_fork_file_name(real_filename);
set_fork_sample_rate(samples_per_second());
fork_child_for_read();
if (child_fork_succeeded() == true) {
/* NOTE: the file description will be closed by
* AUDIO_IO_FORKED_STREAM::clean_child() */
filedes_rep = file_descriptor();
f1_rep = fdopen(filedes_rep, "r"); /* not part of <cstdio> */
if (f1_rep == 0) {
finished_rep = true;
triggered_rep = false;
}
}
}
void MIKMOD_INTERFACE::set_parameter(int param,
string value)
{
switch (param) {
case 1:
set_label(value);
break;
case 2:
opt_filename_rep = value;
break;
}
}
string MIKMOD_INTERFACE::get_parameter(int param) const
{
switch (param) {
case 1:
return(label());
case 2:
return(opt_filename_rep);
}
return("");
}
void MIKMOD_INTERFACE::start_io(void)
{
if (triggered_rep != true) {
if (io_mode() == io_read)
fork_mikmod();
triggered_rep = true;
}
}
void MIKMOD_INTERFACE::stop_io(void)
{
if (triggered_rep == true) {
if (io_mode() == io_read)
clean_child(true);
triggered_rep = false;
}
}
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