/* -*- c-basic-offset: 8 -*-

rdesktop: A Remote Desktop Protocol client.

Sound Channel Process Functions - SGI/IRIX

Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 2003-2008

Copyright (C) GuoJunBo <guojunbo@ict.ac.cn> 2003

Copyright (C) Jeremy Meng <void.foo@gmail.com> 2004-2005

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 3 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, see <http://www.gnu.org/licenses/>.

*/

#include "rdesktop.h"

#include "rdpsnd.h"

#include <errno.h>

#include <dmedia/audio.h>

#include <unistd.h>

/* #define IRIX_DEBUG 1 */

#define IRIX_MAX_VOL 65535

ALconfig audioconfig;

ALport output_port;

static int g_snd_rate;

static int width = AL_SAMPLE_16;

static char *sgi_output_device = NULL;

double min_volume, max_volume, volume_range;

int resource, maxFillable;

int combinedFrameSize;

void sgi_play(void);

void

sgi_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)

{

/* We need to be called rather often... */

if (output_port != (ALport) 0 && !rdpsnd_queue_empty())

FD_SET(0, wfds);

}

void

sgi_check_fds(fd_set * rfds, fd_set * wfds)

{

if (output_port == (ALport) 0)

return;

if (!rdpsnd_queue_empty())

sgi_play();

}

RD_BOOL

sgi_open(void)

{

ALparamInfo pinfo;

static int warned = 0;

#if (defined(IRIX_DEBUG))

logger(Sound, Debug, "sgi_open()");

#endif

if (!warned && sgi_output_device)

{

logger(Sound, Warning, "sgi_open(), device-options not supported for libao-driver");

warned = 1;

}

if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)

{

logger(Sound, Error, "sgi_open(), alGetParamInfo failed: %s",

alGetErrorString(oserror()));

}

min_volume = alFixedToDouble(pinfo.min.ll);

max_volume = alFixedToDouble(pinfo.max.ll);

volume_range = (max_volume - min_volume);

logger(Sound, Debug, "sgi_open(), minvol = %lf, maxvol= %lf, range = %lf",

min_volume, max_volume, volume_range);

audioconfig = alNewConfig();

if (audioconfig == (ALconfig) 0)

{

logger(Sound, Error, "sgi_open(), alNewConfig failed: %s",

alGetErrorString(oserror()));

return False;

}

output_port = alOpenPort("rdpsnd", "w", 0);

if (output_port == (ALport) 0)

{

logger(Sound, Error, "sgi_open(), alOpenPort failed: %s",

alGetErrorString(oserror()));

return False;

}

logger(Sound, Debug, "sgi_open(), done");

return True;

}

void

sgi_close(void)

{

/* Ack all remaining packets */

logger(Sound, Debug, "sgi_close()");

while (!rdpsnd_queue_empty())

rdpsnd_queue_next(0);

alDiscardFrames(output_port, 0);

alClosePort(output_port);

output_port = (ALport) 0;

alFreeConfig(audioconfig);

logger(Sound, Debug, "sgi_close(), done");

}

RD_BOOL

sgi_format_supported(RD_WAVEFORMATEX * pwfx)

{

if (pwfx->wFormatTag != WAVE_FORMAT_PCM)

return False;

if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))

return False;

if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))

return False;

return True;

}

RD_BOOL

sgi_set_format(RD_WAVEFORMATEX * pwfx)

{

int channels;

int frameSize, channelCount;

ALpv params;

logger(Sound, Debug, "sgi_set_format()");

if (pwfx->wBitsPerSample == 8)

width = AL_SAMPLE_8;

else if (pwfx->wBitsPerSample == 16)

width = AL_SAMPLE_16;

/* Limited support to configure an opened audio port in IRIX. The

number of channels is a static setting and can not be changed after

a port is opened. So if the number of channels remains the same, we

can configure other settings; otherwise we have to reopen the audio

port, using same config. */

channels = pwfx->nChannels;

g_snd_rate = pwfx->nSamplesPerSec;

alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);

alSetWidth(audioconfig, width);

if (channels != alGetChannels(audioconfig))

{

alClosePort(output_port);

alSetChannels(audioconfig, channels);

output_port = alOpenPort("rdpsnd", "w", audioconfig);

if (output_port == (ALport) 0)

{

logger(Sound, Error, "sgi_set_format(), alOpenPort failed: %s",

alGetErrorString(oserror()));

return False;

}

}

resource = alGetResource(output_port);

maxFillable = alGetFillable(output_port);

channelCount = alGetChannels(audioconfig);

frameSize = alGetWidth(audioconfig);

if (frameSize == 0 || channelCount == 0)

{

logger(Sound, Error, "sgi_set_format(), bad frameSize or channelCount");

return False;

}

combinedFrameSize = frameSize * channelCount;

params.param = AL_RATE;

params.value.ll = (long long) g_snd_rate << 32;

if (alSetParams(resource, &params, 1) < 0)

{

logger(Sound, Error, "sgi_set_format(), alSetParams failed: %s",

alGetErrorString(oserror()));

return False;

}

if (params.sizeOut < 0)

{

logger(Sound, Error, "sgi_set_format(), invalid rate %d", g_snd_rate);

return False;

}

logger(Sound, Debug, "sgi_set_format(), done");

return True;

}

void

sgi_volume(uint16 left, uint16 right)

{

double gainleft, gainright;

ALpv pv[1];

ALfixed gain[8];

logger(Sound, Debug, "sgi_volume(), left=%d, right=%d", left, right);

gainleft = (double) left / IRIX_MAX_VOL;

gainright = (double) right / IRIX_MAX_VOL;

gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);

gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);

pv[0].param = AL_GAIN;

pv[0].value.ptr = gain;

pv[0].sizeIn = 8;

if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)

{

logger(Sound, Error, "sgi_volume(), alSetParams failed: %s",

alGetErrorString(oserror()));

return;

}

logger(Sound, Debug, "sgi_volume(), done");

}

void

sgi_play(void)

{

struct audio_packet *packet;

ssize_t len;

STREAM out;

unsigned char *data;

int gf;

while (1)

{

if (rdpsnd_queue_empty())

return;

packet = rdpsnd_queue_current_packet();

out = packet->s;

len = s_remaining(out);

in_uint8p(out, data, len);

alWriteFrames(output_port, data, len / combinedFrameSize);

if (s_check_end(out))

{

gf = alGetFilled(output_port);

if (gf < (4 * maxFillable / 10))

{

rdpsnd_queue_next(0);

}

else

{

/* logger(Sound,Debug, "sgi_play(), busy playing..."); */

usleep(10);

return;

}

}

}

}

struct audio_driver *

sgi_register(char *options)

{

static struct audio_driver sgi_driver;

memset(&sgi_driver, 0, sizeof(sgi_driver));

sgi_driver.name = "sgi";

sgi_driver.description = "SGI output driver";

sgi_driver.add_fds = sgi_add_fds;

sgi_driver.check_fds = sgi_check_fds;

sgi_driver.wave_out_open = sgi_open;

sgi_driver.wave_out_close = sgi_close;

sgi_driver.wave_out_format_supported = sgi_format_supported;

sgi_driver.wave_out_set_format = sgi_set_format;

sgi_driver.wave_out_volume = sgi_volume;

sgi_driver.need_byteswap_on_be = 1;

sgi_driver.need_resampling = 0;

if (options)

{

sgi_output_device = xstrdup(options);

}

return &sgi_driver;

}