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arts/flow/audioiomas.cpp

620 lines
16 KiB

/*
Copyright (C) 2001-2003 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*
* Only compile this AudioIO class if we have MAS
*/
#ifdef HAVE_LIBMAS
extern "C" {
#include <mas/mas.h>
#include <mas/mas_getset.h>
#include <mas/mas_source.h>
}
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <algorithm>
#include "debug.h"
#include "audioio.h"
#include "audiosubsys.h"
#include "iomanager.h"
#include "dispatcher.h"
namespace Arts {
class AudioIOMAS : public AudioIO, public TimeNotify {
protected:
mas_channel_t audio_channel;
mas_port_t mix_sink;
mas_port_t srate_source, srate_sink;
mas_port_t audio_source, audio_sink;
mas_port_t endian_sink, endian_source;
mas_port_t sbuf_source, sbuf_sink;
mas_port_t squant_sink, squant_source;
mas_port_t open_source; /* (!) */
mas_device_t endian;
mas_device_t srate;
mas_device_t squant;
mas_device_t sbuf;
mas_data *data;
mas_package package;
int32 mas_error;
std::list<mas_channel_t> allocated_channels;
std::list<mas_port_t> allocated_ports;
std::list<mas_device_t> allocated_devices;
double lastUpdate, bytesPerSec;
int readBufferAvailable;
int writeBufferAvailable;
double currentTime();
void updateBufferSizes();
#ifdef WORDS_BIGENDIAN
static const int defaultFormat = 17;
#else
static const int defaultFormat = 16;
#endif
bool close_with_error(const std::string& text);
public:
AudioIOMAS();
// Timer callback
void notifyTime();
void setParam(AudioParam param, int& value);
int getParam(AudioParam param);
bool open();
void close();
int read(void *buffer, int size);
int write(void *buffer, int size);
};
REGISTER_AUDIO_IO(AudioIOMAS,"mas","MAS Audio Input/Output");
};
using namespace std;
using namespace Arts;
AudioIOMAS::AudioIOMAS()
{
/*
* default parameters
*/
param(samplingRate) = 44100;
paramStr(deviceName) = ""; // TODO
param(fragmentSize) = 4096;
param(fragmentCount) = 7;
param(channels) = 2;
param(direction) = 2;
param(format) = defaultFormat;
}
namespace {
int masInitCount = 0;
}
// Opens the audio device
bool AudioIOMAS::open()
{
string& _error = paramStr(lastError);
string& _deviceName = paramStr(deviceName);
int& _channels = param(channels);
int& _fragmentSize = param(fragmentSize);
int& _fragmentCount = param(fragmentCount);
int& _samplingRate = param(samplingRate);
int& _format = param(format);
/* FIXME: do we need to free what we allocate with mas_init() in close() */
if (!masInitCount)
{
mas_error = mas_init();
if (mas_error < 0)
return close_with_error("error connecting to MAS server");
}
masInitCount++;
if (param(direction) != 2)
{
_error = "unsupported direction (currently no full duplex support)";
return false;
}
/*
* data path
*
* audio_sink
* audio_channel: data_channel ("artsd")
* audio_source
* |
* V
* endian_sink
* endian: instantiate_device ("endian")
* open_source = endian_source
* |
* V
* [squant_sink]
* [squant]
* [squant_source]
* |
* V
* [srate_sink]
* [srate]
* [srate_source]
* |
* V
* sbuf_sink
* sbuf
* sbuf_source
* |
* V
* mix_sink: port ("default_mix_sink")
*/
// audio_channel, source & sink
mas_error = mas_make_data_channel("artsd", &audio_channel, &audio_source, &audio_sink);
if (mas_error < 0)
return close_with_error("error initializing MAS data channel");
allocated_channels.push_back(audio_channel);
allocated_ports.push_back(audio_source);
allocated_ports.push_back(audio_sink);
// endian, source & sink
mas_error = mas_asm_instantiate_device( "endian", 0, 0, &endian );
if ( mas_error < 0 )
return close_with_error("error initantiating MAS endian device");
allocated_devices.push_back(endian);
mas_error = mas_asm_get_port_by_name( endian, "sink", &endian_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS endian device sink port");
allocated_ports.push_back(endian_sink);
mas_error = mas_asm_get_port_by_name( endian, "source", &endian_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS endian device source port");
allocated_ports.push_back(endian_source);
char ratestring[16], resolutionstring[16];
sprintf (ratestring, "%u", _samplingRate);
sprintf (resolutionstring, "%u", _format);
mas_data_characteristic* dc;
dc = (mas_data_characteristic *)MAS_NEW( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc, "format", (_format==8) ? "ulinear":"linear" );
masc_append_dc_key_value( dc, "resolution", resolutionstring );
masc_append_dc_key_value( dc, "sampling rate", ratestring );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "little" );
mas_error = mas_asm_connect_source_sink( audio_source, endian_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting MAS net audio source to endian sink");
/* The next device is 'if needed' only. After the following if()
statement, open_source will contain the current unconnected
source in the path (will be either endian_source or
squant_source in this case)
*/
open_source = endian_source;
if ( _format != 16 )
{
arts_debug("MAS output: Sample resolution is not 16 bit/sample, instantiating squant device.");
// squant, source & sink
mas_error = mas_asm_instantiate_device( "squant", 0, 0, &squant );
if ( mas_error < 0 )
return close_with_error("error creating MAS squant device");
allocated_devices.push_back(squant);
mas_error = mas_asm_get_port_by_name( squant, "sink", &squant_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS squant device sink port");
allocated_ports.push_back(squant_sink);
mas_error = mas_asm_get_port_by_name( squant, "source", &squant_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS squant device source port");
allocated_ports.push_back(squant_source);
arts_debug( "MAS output: Connecting endian -> squant.");
masc_strike_dc( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc,"format",(_format==8) ? "ulinear":"linear" );
masc_append_dc_key_value( dc, "resolution", resolutionstring );
masc_append_dc_key_value( dc, "sampling rate", ratestring );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "host" );
mas_error = mas_asm_connect_source_sink( endian_source, squant_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting MAS endian output to squant device");
/* sneaky: the squant device is optional -> pretend it isn't there */
open_source = squant_source;
}
/* Another 'if necessary' device, as above */
if ( _samplingRate != 44100 )
{
arts_debug ("MAS output: Sample rate is not 44100, instantiating srate device.");
// srate, source & sink
mas_error = mas_asm_instantiate_device( "srate", 0, 0, &srate );
if ( mas_error < 0 )
return close_with_error("error initantiating MAS srate device");
allocated_devices.push_back(srate);
mas_error = mas_asm_get_port_by_name( srate, "sink", &srate_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS srate sink port");
allocated_ports.push_back(srate_sink);
mas_error = mas_asm_get_port_by_name( srate, "source", &srate_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS srate source port");
allocated_ports.push_back(srate_source);
arts_debug( "MAS output: Connecting to srate.");
masc_strike_dc( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc, "format", "linear" );
masc_append_dc_key_value( dc, "resolution", "16" );
masc_append_dc_key_value( dc, "sampling rate", ratestring );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "host" );
mas_error = mas_asm_connect_source_sink( open_source, srate_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting to MAS srate device");
open_source = srate_source;
}
// sbuf, source & sink
mas_error = mas_asm_instantiate_device( "sbuf", 0, 0, &sbuf );
if ( mas_error < 0 )
return close_with_error("error initantiating MAS sbuf device");
allocated_devices.push_back(sbuf);
mas_error = mas_asm_get_port_by_name( sbuf, "sink", &sbuf_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS sbuf device sink port");
allocated_ports.push_back(sbuf_sink);
mas_error = mas_asm_get_port_by_name( sbuf, "source", &sbuf_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS sbuf device source port");
allocated_ports.push_back(sbuf_source);
masc_strike_dc( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc, "format", "linear" );
masc_append_dc_key_value( dc, "resolution", "16" );
masc_append_dc_key_value( dc, "sampling rate", "44100" );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "host" );
arts_debug("MAS output: Connecting to sbuf.");
mas_error = mas_asm_connect_source_sink( open_source, sbuf_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting to MAS mixer device");
/* configure sbuf */
float BUFTIME_MS = _fragmentSize * _fragmentCount;
BUFTIME_MS *= 1000.0;
BUFTIME_MS /= (float)_channels;
if (_format > 8)
BUFTIME_MS /= 2.0;
BUFTIME_MS /= (float)_samplingRate;
arts_debug("MAS output: BUFTIME_MS = %f", BUFTIME_MS);
masc_setup_package( &package, NULL, 0, 0 );
masc_pushk_uint32( &package, "buftime_ms", (uint32) BUFTIME_MS );
masc_finalize_package( &package );
mas_set( sbuf, "buftime_ms", &package );
masc_strike_package( &package );
masc_setup_package( &package, NULL, 0, 0 );
masc_pushk_int32( &package, "mc_clkid", 9 );
masc_finalize_package( &package );
mas_set( sbuf, "mc_clkid", &package );
masc_strike_package( &package );
mas_source_play( sbuf );
// mix_sink
mas_error = mas_asm_get_port_by_name( 0, "default_mix_sink", &mix_sink );
if (mas_error < 0)
return close_with_error("error finding MAS default sink");
allocated_ports.push_back(mix_sink);
arts_debug("MAS output: Connecting sbuf to mix_sink.");
mas_error = mas_asm_connect_source_sink( sbuf_source, mix_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting to MAS mixer device");
data = (mas_data *)MAS_NEW( data );
masc_setup_data( data, _fragmentSize ); /* we can reuse this */
data->length = _fragmentSize;
data->allocated_length = data->length;
data->header.type = 10;
arts_debug("MAS output: playing.");
// Install the timer
Dispatcher::the()->ioManager()->addTimer(10, this);
bytesPerSec = _channels * _samplingRate;
if (_format > 8)
bytesPerSec *= 2;
lastUpdate = 0;
return true;
}
double AudioIOMAS::currentTime()
{
timeval tv;
gettimeofday(&tv,0);
return (double)tv.tv_sec + (double)tv.tv_usec/1000000.0;
}
bool AudioIOMAS::close_with_error(const string& text)
{
string& error = paramStr(lastError);
error = text;
error += masc_strmerror (mas_error);
return false;
}
void AudioIOMAS::close()
{
list<mas_port_t>::iterator pi;
for (pi = allocated_ports.begin(); pi != allocated_ports.end(); pi++)
mas_free_port (*pi);
allocated_ports.clear();
list<mas_channel_t>::iterator ci;
for (ci = allocated_channels.begin(); ci != allocated_channels.end(); ci++)
mas_free_channel (*ci);
allocated_channels.clear();
list<mas_device_t>::iterator di;
for (di = allocated_devices.begin(); di != allocated_devices.end(); di++)
{
mas_device_t device = *di;
mas_error = mas_asm_terminate_device_instance(device, 0);
if (mas_error < 0)
arts_warning ("MAS output: error while closing device: %s", masc_strmerror(mas_error));
mas_free_device(device);
}
allocated_devices.clear();
Dispatcher::the()->ioManager()->removeTimer(this);
}
void AudioIOMAS::updateBufferSizes()
{
double time = currentTime();
double waterMark = param(fragmentSize);
waterMark *= 1.3;
if ((time - lastUpdate) * bytesPerSec < waterMark)
return;
lastUpdate = time;
uint32 inbuf_ms;
int32 mas_error;
mas_error = mas_get( sbuf, "inbuf_ms", 0 , &package );
if ( mas_error < 0 )
arts_fatal ("MAS output: error getting size of buffer: %s", masc_strmerror(mas_error));
masc_pull_uint32( &package, &inbuf_ms );
masc_strike_package( &package );
//arts_debug(" inbuf_ms = %u", inbuf_ms);
float bytes = inbuf_ms;
bytes /= 1000.0;
bytes *= param(samplingRate);
bytes *= param(channels);
if(param(format) > 8)
bytes *= 2;
int bytesFree = param(fragmentSize) * param(fragmentCount) - (int)bytes;
if (bytesFree < param(fragmentSize))
bytesFree = 0;
writeBufferAvailable = bytesFree;
arts_debug ("MAS output buffer: %6d / %6d bytes used => %6d bytes free",
(int)bytes, param(fragmentSize) * param(fragmentCount), writeBufferAvailable);
}
// This is called on each timer tick
void AudioIOMAS::notifyTime()
{
updateBufferSizes();
int& _direction = param(direction);
int& _fragmentSize = param(fragmentSize);
for (;;) {
int todo = 0;
if ((_direction & directionRead) && (getParam(canRead) >= _fragmentSize))
todo |= AudioSubSystem::ioRead;
if ((_direction & directionWrite) && (getParam(canWrite) >= _fragmentSize))
todo |= AudioSubSystem::ioWrite;
if (!todo)
return;
AudioSubSystem::the()->handleIO(todo);
}
}
void AudioIOMAS::setParam(AudioParam p, int& value)
{
switch(p) {
#if 0
case fragmentSize:
param(p) = requestedFragmentSize = value;
break;
case fragmentCount:
param(p) = requestedFragmentCount = value;
break;
#endif
default:
param(p) = value;
break;
}
}
int AudioIOMAS::getParam(AudioParam p)
{
int bytes;
int count;
switch(p)
{
#if 0
case canRead:
if (ioctl(audio_fd, AUDIO_GETINFO, &auinfo) < 0)
return (0);
bytes = (auinfo.record.samples * bytesPerSample) - bytesRead;
if (bytes < 0) {
printf("Error: bytes %d < 0, samples=%u, bytesRead=%u\n",
bytes, auinfo.record.samples, bytesRead);
bytes = 0;
}
return bytes;
case canWrite:
if (ioctl(audio_fd, AUDIO_GETINFO, &auinfo) < 0)
return (0);
count = SUN_MAX_BUFFER_SIZE -
(bytesWritten - (auinfo.play.samples * bytesPerSample));
return count;
#endif
case canWrite:
return writeBufferAvailable;
case autoDetect:
/*
* Fairly small priority, for we haven't tested this a lot
*/
return 3;
default:
return param(p);
}
}
int AudioIOMAS::read(void *buffer, int size)
{
#if 0
size = ::read(audio_fd, buffer, size);
if (size < 0)
return 0;
bytesRead += size;
return size;
#endif
return 0;
}
int AudioIOMAS::write(void *buffer, int size)
{
static int ts = 0;
static int seq = 0;
data->header.sequence = seq++;
data->header.media_timestamp = ts;
ts += size / 4;
assert(size == data->length);
memcpy(data->segment, buffer, size);
int32 mas_error = mas_send( audio_channel , data );
if (mas_error < 0)
arts_fatal ("MAS output: problem during mas_send: %s", masc_strmerror(mas_error));
writeBufferAvailable -= size;
return size;
}
#endif /* HAVE_LIBMAS */