reactos/modules/rosapps/applications/net/tsclient/rdesktop/rdpsnd_oss.c

320 lines
6.3 KiB
C

/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Sound Channel Process Functions - Open Sound System
Copyright (C) Matthew Chapman 2003
Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
This is a workaround for Esound bug 312665.
FIXME: Remove this when Esound is fixed.
*/
#ifdef _FILE_OFFSET_BITS
#undef _FILE_OFFSET_BITS
#endif
#include "rdesktop.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#define MAX_QUEUE 10
int This->dsp_;
BOOL This->dsp_bu = False;
static int g_snd_rate;
static short g_samplewidth;
static BOOL g_driver_broken = False;
static struct audio_packet
{
struct stream s;
uint16 tick;
uint8 index;
} packet_queue[MAX_QUEUE];
static unsigned int queue_hi, queue_lo;
BOOL
wave_out_open(void)
{
char *dsp_dev = getenv("AUDIODEV");
if (dsp_dev == NULL)
{
dsp_dev = xstrdup("/dev/dsp");
}
if ((This->dsp_ = open(dsp_dev, O_WRONLY | O_NONBLOCK)) == -1)
{
perror(dsp_dev);
return False;
}
/* Non-blocking so that user interface is responsive */
fcntl(This->dsp_, F_SETFL, fcntl(This->dsp_, F_GETFL) | O_NONBLOCK);
return True;
}
void
wave_out_close(void)
{
close(This->dsp_);
}
BOOL
wave_out_format_supported(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;
}
BOOL
wave_out_set_format(WAVEFORMATEX * pwfx)
{
int stereo, format, fragments;
ioctl(This->dsp_, SNDCTL_DSP_RESET, NULL);
ioctl(This->dsp_, SNDCTL_DSP_SYNC, NULL);
if (pwfx->wBitsPerSample == 8)
format = AFMT_U8;
else if (pwfx->wBitsPerSample == 16)
format = AFMT_S16_LE;
g_samplewidth = pwfx->wBitsPerSample / 8;
if (ioctl(This->dsp_, SNDCTL_DSP_SETFMT, &format) == -1)
{
perror("SNDCTL_DSP_SETFMT");
close(This->dsp_);
return False;
}
if (pwfx->nChannels == 2)
{
stereo = 1;
g_samplewidth *= 2;
}
else
{
stereo = 0;
}
if (ioctl(This->dsp_, SNDCTL_DSP_STEREO, &stereo) == -1)
{
perror("SNDCTL_DSP_CHANNELS");
close(This->dsp_);
return False;
}
g_snd_rate = pwfx->nSamplesPerSec;
if (ioctl(This->dsp_, SNDCTL_DSP_SPEED, &g_snd_rate) == -1)
{
perror("SNDCTL_DSP_SPEED");
close(This->dsp_);
return False;
}
/* try to get 7 fragments of 2^12 bytes size */
fragments = (7 << 16) + 12;
ioctl(This->dsp_, SNDCTL_DSP_SETFRAGMENT, &fragments);
if (!g_driver_broken)
{
audio_buf_info info;
memset(&info, 0, sizeof(info));
if (ioctl(This->dsp_, SNDCTL_DSP_GETOSPACE, &info) == -1)
{
perror("SNDCTL_DSP_GETOSPACE");
close(This->dsp_);
return False;
}
if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0)
{
fprintf(stderr,
"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
info.fragments, info.fragstotal, info.fragsize);
g_driver_broken = True;
}
}
return True;
}
void
wave_out_volume(uint16 left, uint16 right)
{
static BOOL use_dev_mixer = False;
uint32 volume;
int fd_mix = -1;
volume = left / (65536 / 100);
volume |= right / (65536 / 100) << 8;
if (use_dev_mixer)
{
if ((fd_mix = open("/dev/mixer", O_RDWR | O_NONBLOCK)) == -1)
{
perror("open /dev/mixer");
return;
}
if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
{
perror("MIXER_WRITE(SOUND_MIXER_PCM)");
return;
}
close(fd_mix);
}
if (ioctl(This->dsp_, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
{
perror("MIXER_WRITE(SOUND_MIXER_PCM)");
use_dev_mixer = True;
return;
}
}
void
wave_out_write(STREAM s, uint16 tick, uint8 index)
{
struct audio_packet *packet = &packet_queue[queue_hi];
unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
if (next_hi == queue_lo)
{
error("No space to queue audio packet\n");
return;
}
queue_hi = next_hi;
packet->s = *s;
packet->tick = tick;
packet->index = index;
packet->s.p += 4;
/* we steal the data buffer from s, give it a new one */
s->data = (uint8 *) malloc(s->size);
if (!This->dsp_bu)
wave_out_play();
}
void
wave_out_play(void)
{
struct audio_packet *packet;
ssize_t len;
STREAM out;
static long startedat_us;
static long startedat_s;
static BOOL started = False;
struct timeval tv;
audio_buf_info info;
while (1)
{
if (queue_lo == queue_hi)
{
This->dsp_bu = 0;
return;
}
packet = &packet_queue[queue_lo];
out = &packet->s;
if (!started)
{
gettimeofday(&tv, NULL);
startedat_us = tv.tv_usec;
startedat_s = tv.tv_sec;
started = True;
}
len = out->end - out->p;
if (!g_driver_broken)
{
memset(&info, 0, sizeof(info));
if (ioctl(This->dsp_, SNDCTL_DSP_GETOSPACE, &info) == -1)
{
perror("SNDCTL_DSP_GETOSPACE");
return;
}
if (info.fragments == 0)
{
This->dsp_bu = 1;
return;
}
if (info.fragments * info.fragsize < len
&& info.fragments * info.fragsize > 0)
{
len = info.fragments * info.fragsize;
}
}
len = write(This->dsp_, out->p, len);
if (len == -1)
{
if (errno != EWOULDBLOCK)
perror("write audio");
This->dsp_bu = 1;
return;
}
out->p += len;
if (out->p == out->end)
{
long long duration;
long elapsed;
gettimeofday(&tv, NULL);
duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate)));
elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
if (elapsed >= (duration * 85) / 100)
{
rdpsnd_send_completion(packet->tick, packet->index);
free(out->data);
queue_lo = (queue_lo + 1) % MAX_QUEUE;
started = False;
}
else
{
This->dsp_bu = 1;
return;
}
}
}
}