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/* |
/* -*- c-basic-offset: 8 -*- |
2 |
rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
3 |
Sound Channel Process Functions - Open Sound System |
Sound Channel Process Functions - Open Sound System |
4 |
Copyright (C) Matthew Chapman 2003 |
Copyright (C) Matthew Chapman 2003 |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
*/ |
*/ |
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/* |
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This is a workaround for Esound bug 312665. |
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FIXME: Remove this when Esound is fixed. |
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*/ |
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#ifdef _FILE_OFFSET_BITS |
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#undef _FILE_OFFSET_BITS |
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#endif |
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#include "rdesktop.h" |
#include "rdesktop.h" |
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#include "rdpsnd.h" |
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#include "rdpsnd_dsp.h" |
33 |
#include <unistd.h> |
#include <unistd.h> |
34 |
#include <fcntl.h> |
#include <fcntl.h> |
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#include <errno.h> |
#include <errno.h> |
37 |
#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
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#include <sys/soundcard.h> |
#include <sys/soundcard.h> |
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|
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#define MAX_QUEUE 10 |
#define DEFAULTDEVICE "/dev/dsp" |
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#define MAX_LEN 512 |
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int g_dsp_fd; |
static int snd_rate; |
44 |
BOOL g_dsp_busy = False; |
static short samplewidth; |
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static int g_snd_rate; |
static char *dsp_dev; |
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static short g_samplewidth; |
static struct audio_driver oss_driver; |
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static struct audio_packet |
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{ |
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struct stream s; |
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uint16 tick; |
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uint8 index; |
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} packet_queue[MAX_QUEUE]; |
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static unsigned int queue_hi, queue_lo; |
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BOOL |
BOOL |
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wave_out_open(void) |
oss_open(void) |
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{ |
{ |
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char *dsp_dev = "/dev/dsp"; |
if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1) |
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if ((g_dsp_fd = open(dsp_dev, O_WRONLY | O_NONBLOCK)) == -1) |
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{ |
{ |
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perror(dsp_dev); |
perror(dsp_dev); |
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return False; |
return False; |
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} |
} |
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/* Non-blocking so that user interface is responsive */ |
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fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) | O_NONBLOCK); |
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return True; |
return True; |
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} |
} |
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void |
void |
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wave_out_close(void) |
oss_close(void) |
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{ |
{ |
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close(g_dsp_fd); |
close(g_dsp_fd); |
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} |
} |
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BOOL |
BOOL |
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wave_out_format_supported(WAVEFORMATEX * pwfx) |
oss_format_supported(WAVEFORMATEX * pwfx) |
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{ |
{ |
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if (pwfx->wFormatTag != WAVE_FORMAT_PCM) |
if (pwfx->wFormatTag != WAVE_FORMAT_PCM) |
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return False; |
return False; |
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} |
} |
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|
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BOOL |
BOOL |
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wave_out_set_format(WAVEFORMATEX * pwfx) |
oss_set_format(WAVEFORMATEX * pwfx) |
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{ |
{ |
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int channels, format; |
int stereo, format, fragments; |
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static BOOL driver_broken = False; |
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|
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ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL); |
ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL); |
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ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL); |
ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL); |
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else if (pwfx->wBitsPerSample == 16) |
else if (pwfx->wBitsPerSample == 16) |
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format = AFMT_S16_LE; |
format = AFMT_S16_LE; |
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g_samplewidth = pwfx->wBitsPerSample / 8; |
samplewidth = pwfx->wBitsPerSample / 8; |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1) |
if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1) |
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{ |
{ |
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return False; |
return False; |
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} |
} |
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channels = pwfx->nChannels; |
if (pwfx->nChannels == 2) |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_CHANNELS, &channels) == -1) |
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{ |
{ |
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perror("SNDCTL_DSP_CHANNELS"); |
stereo = 1; |
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close(g_dsp_fd); |
samplewidth *= 2; |
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return False; |
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} |
} |
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else |
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if (channels == 2) |
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{ |
{ |
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g_samplewidth *= 2; |
stereo = 0; |
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} |
} |
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g_snd_rate = pwfx->nSamplesPerSec; |
if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1) |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &g_snd_rate) == -1) |
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{ |
{ |
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perror("SNDCTL_DSP_SPEED"); |
perror("SNDCTL_DSP_CHANNELS"); |
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close(g_dsp_fd); |
close(g_dsp_fd); |
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return False; |
return False; |
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} |
} |
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return True; |
oss_driver.need_resampling = 0; |
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} |
snd_rate = pwfx->nSamplesPerSec; |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1) |
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{ |
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int rates[] = { 44100, 48000, 0 }; |
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int *prates = rates; |
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void |
while (*prates != 0) |
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wave_out_volume(uint16 left, uint16 right) |
{ |
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{ |
if ((pwfx->nSamplesPerSec != *prates) |
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static BOOL use_dev_mixer = False; |
&& (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, prates) != -1)) |
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uint32 volume; |
{ |
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int fd_mix = -1; |
oss_driver.need_resampling = 1; |
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snd_rate = *prates; |
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if (rdpsnd_dsp_resample_set |
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(snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False) |
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{ |
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error("rdpsnd_dsp_resample_set failed"); |
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close(g_dsp_fd); |
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return False; |
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} |
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volume = left / (65536 / 100); |
break; |
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volume |= right / (65536 / 100) << 8; |
} |
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prates++; |
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} |
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if (use_dev_mixer) |
if (*prates == 0) |
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{ |
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if ((fd_mix = open("/dev/mixer", O_RDWR | O_NONBLOCK)) == -1) |
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{ |
{ |
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perror("open /dev/mixer"); |
perror("SNDCTL_DSP_SPEED"); |
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return; |
close(g_dsp_fd); |
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return False; |
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} |
} |
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} |
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/* try to get 12 fragments of 2^12 bytes size */ |
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fragments = (12 << 16) + 12; |
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ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments); |
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if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
if (!driver_broken) |
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{ |
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audio_buf_info info; |
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memset(&info, 0, sizeof(info)); |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) |
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{ |
{ |
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perror("MIXER_WRITE(SOUND_MIXER_PCM)"); |
perror("SNDCTL_DSP_GETOSPACE"); |
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return; |
close(g_dsp_fd); |
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return False; |
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} |
} |
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close(fd_mix); |
if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0) |
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{ |
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fprintf(stderr, |
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"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n", |
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info.fragments, info.fragstotal, info.fragsize); |
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driver_broken = True; |
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} |
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} |
} |
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if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
return True; |
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{ |
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perror("MIXER_WRITE(SOUND_MIXER_PCM)"); |
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use_dev_mixer = True; |
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return; |
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} |
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} |
} |
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void |
void |
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wave_out_write(STREAM s, uint16 tick, uint8 index) |
oss_volume(uint16 left, uint16 right) |
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{ |
{ |
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struct audio_packet *packet = &packet_queue[queue_hi]; |
uint32 volume; |
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unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; |
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if (next_hi == queue_lo) |
volume = left / (65536 / 100); |
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volume |= right / (65536 / 100) << 8; |
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if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
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{ |
{ |
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error("No space to queue audio packet\n"); |
warning("hardware volume control unavailable, falling back to software volume control!\n"); |
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oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set; |
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rdpsnd_dsp_softvol_set(left, right); |
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return; |
return; |
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} |
} |
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queue_hi = next_hi; |
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packet->s = *s; |
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packet->tick = tick; |
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packet->index = index; |
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packet->s.p += 4; |
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/* we steal the data buffer from s, give it a new one */ |
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s->data = malloc(s->size); |
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if (!g_dsp_busy) |
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wave_out_play(); |
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} |
} |
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void |
void |
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wave_out_play(void) |
oss_play(void) |
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{ |
{ |
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struct audio_packet *packet; |
struct audio_packet *packet; |
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ssize_t len; |
ssize_t len; |
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static BOOL started = False; |
static BOOL started = False; |
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struct timeval tv; |
struct timeval tv; |
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|
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while (1) |
if (rdpsnd_queue_empty()) |
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{ |
{ |
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if (queue_lo == queue_hi) |
g_dsp_busy = 0; |
213 |
{ |
return; |
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g_dsp_busy = 0; |
} |
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return; |
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} |
packet = rdpsnd_queue_current_packet(); |
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out = &packet->s; |
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packet = &packet_queue[queue_lo]; |
if (!started) |
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out = &packet->s; |
{ |
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gettimeofday(&tv, NULL); |
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startedat_us = tv.tv_usec; |
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startedat_s = tv.tv_sec; |
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started = True; |
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} |
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if (!started) |
len = out->end - out->p; |
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len = write(g_dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len); |
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if (len == -1) |
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{ |
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if (errno != EWOULDBLOCK) |
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perror("write audio"); |
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g_dsp_busy = 1; |
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return; |
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} |
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out->p += len; |
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if (out->p == out->end) |
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{ |
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long long duration; |
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long elapsed; |
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gettimeofday(&tv, NULL); |
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duration = (out->size * (1000000 / (samplewidth * snd_rate))); |
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elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us); |
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if (elapsed >= (duration * 85) / 100) |
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{ |
{ |
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gettimeofday(&tv, NULL); |
/* We need to add 50 to tell windows that time has passed while |
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startedat_us = tv.tv_usec; |
* playing this packet */ |
252 |
startedat_s = tv.tv_sec; |
rdpsnd_send_completion(packet->tick + 50, packet->index); |
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started = True; |
rdpsnd_queue_next(); |
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started = False; |
255 |
} |
} |
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else |
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len = write(g_dsp_fd, out->p, out->end - out->p); |
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if (len == -1) |
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{ |
{ |
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if (errno != EWOULDBLOCK) |
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perror("write audio"); |
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g_dsp_busy = 1; |
g_dsp_busy = 1; |
259 |
return; |
return; |
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} |
} |
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} |
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g_dsp_busy = 1; |
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return; |
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} |
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out->p += len; |
struct audio_driver * |
267 |
if (out->p == out->end) |
oss_register(char *options) |
268 |
{ |
{ |
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long long duration; |
oss_driver.wave_out_write = rdpsnd_queue_write; |
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long elapsed; |
oss_driver.wave_out_open = oss_open; |
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oss_driver.wave_out_close = oss_close; |
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oss_driver.wave_out_format_supported = oss_format_supported; |
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oss_driver.wave_out_set_format = oss_set_format; |
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oss_driver.wave_out_volume = oss_volume; |
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oss_driver.wave_out_play = oss_play; |
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oss_driver.name = xstrdup("oss"); |
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oss_driver.description = |
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xstrdup("OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV"); |
279 |
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oss_driver.need_byteswap_on_be = 0; |
280 |
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oss_driver.need_resampling = 0; |
281 |
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oss_driver.next = NULL; |
282 |
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|
283 |
gettimeofday(&tv, NULL); |
if (options) |
284 |
duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate))); |
{ |
285 |
elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us); |
dsp_dev = xstrdup(options); |
286 |
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} |
287 |
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else |
288 |
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{ |
289 |
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dsp_dev = getenv("AUDIODEV"); |
290 |
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291 |
if (elapsed >= (duration * 7) / 10) |
if (dsp_dev == NULL) |
292 |
{ |
{ |
293 |
rdpsnd_send_completion(packet->tick, packet->index); |
dsp_dev = xstrdup(DEFAULTDEVICE); |
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free(out->data); |
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queue_lo = (queue_lo + 1) % MAX_QUEUE; |
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started = False; |
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} |
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else |
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{ |
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g_dsp_busy = 1; |
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return; |
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} |
|
294 |
} |
} |
295 |
} |
} |
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297 |
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return &oss_driver; |
298 |
} |
} |