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// ------------------------------------------------------------------------
// audioio-timidity.cpp: Interface class for Timidity++ input.
// Copyright (C) 2000,2002,2004-2006,2008,2009 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-timidity.h"
#include "eca-logger.h"
string TIMIDITY_INTERFACE::default_timidity_cmd = "timidity -Or1S -id -s %s -o - %f";
void TIMIDITY_INTERFACE::set_timidity_cmd(const std::string& value) { TIMIDITY_INTERFACE::default_timidity_cmd = value; }
TIMIDITY_INTERFACE::TIMIDITY_INTERFACE(const std::string& name)
: triggered_rep(false),
finished_rep(false)
{
}
TIMIDITY_INTERFACE::~TIMIDITY_INTERFACE(void)
{
clean_child(true);
if (is_open() == true) {
close();
}
}
void TIMIDITY_INTERFACE::open(void) throw (AUDIO_IO::SETUP_ERROR &)
{
std::string urlprefix;
struct stat buf;
int ret = ::stat(label().c_str(), &buf);
if (ret != 0) {
size_t offset = label().find_first_of("://");
if (offset == std::string::npos) {
throw(SETUP_ERROR(SETUP_ERROR::io_mode, "AUDIOIO-TIMIDITY: Can't open file " + label() + "."));
}
else {
urlprefix = std::string(label(), 0, offset);
ECA_LOG_MSG(ECA_LOGGER::user_objects, "(audioio-timidity) 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);
triggered_rep = false;
finished_rep = false;
AUDIO_IO::open();
}
void TIMIDITY_INTERFACE::close(void)
{
if (pid_of_child() > 0) {
if (io_mode() == io_read) {
kill_timidity();
}
}
AUDIO_IO::close();
}
long int TIMIDITY_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_timidity();
}
bytes_read_rep = std::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, "Can't start process \"" + TIMIDITY_INTERFACE::default_timidity_cmd + "\". Please check your ~/.ecasound/ecasoundrc.");
finished_rep = true;
triggered_rep = false;
}
else finished_rep = false;
return(bytes_read_rep / frame_size());
}
void TIMIDITY_INTERFACE::kill_timidity(void)
{
ECA_LOG_MSG(ECA_LOGGER::user_objects, "(audioio-timidity) Cleaning Timidity++-child with pid=" + kvu_numtostr(pid_of_child()) + ".");
clean_child();
triggered_rep = false;
}
void TIMIDITY_INTERFACE::fork_timidity(void)
{
set_fork_command(TIMIDITY_INTERFACE::default_timidity_cmd);
set_fork_file_name(label());
set_fork_bits(bits());
set_fork_channels(channels());
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;
}
}
if (wait_for_child() != true) {
finished_rep = true;
triggered_rep = false;
}
}
void TIMIDITY_INTERFACE::start_io(void)
{
if (triggered_rep != true) {
if (io_mode() == io_read)
fork_timidity();
triggered_rep = true;
}
}
void TIMIDITY_INTERFACE::stop_io(void)
{
if (triggered_rep == true) {
if (io_mode() == io_read)
clean_child(true);
triggered_rep = false;
}
}
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