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/* |
/* -*- c-basic-offset: 8 -*- |
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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. |
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*/ |
*/ |
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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" |
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#include <unistd.h> |
#include <unistd.h> |
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#include <fcntl.h> |
#include <fcntl.h> |
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#include <errno.h> |
#include <errno.h> |
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#include <unistd.h> |
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#include <sys/time.h> |
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#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
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#include <sys/soundcard.h> |
#include <sys/soundcard.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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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; |
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BOOL g_dsp_busy; |
static short samplewidth; |
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static char *dsp_dev; |
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static struct audio_driver oss_driver; |
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static BOOL in_esddsp; |
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static struct audio_packet { |
static BOOL |
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struct stream s; |
detect_esddsp(void) |
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uint16 tick; |
{ |
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uint8 index; |
struct stat s; |
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} packet_queue[MAX_QUEUE]; |
char *preload; |
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static unsigned int queue_hi, queue_lo; |
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if (fstat(g_dsp_fd, &s) == -1) |
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return False; |
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if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) |
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return False; |
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preload = getenv("LD_PRELOAD"); |
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if (preload == NULL) |
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return False; |
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if (strstr(preload, "esddsp") == NULL) |
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return False; |
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return True; |
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} |
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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"; |
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if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1) |
if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -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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|
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/* Non-blocking so that user interface is responsive */ |
in_esddsp = detect_esddsp(); |
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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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|
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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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g_dsp_busy = 0; |
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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 speed, 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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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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perror("SNDCTL_DSP_SETFMT"); |
perror("SNDCTL_DSP_SETFMT"); |
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close(g_dsp_fd); |
oss_close(); |
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return False; |
return False; |
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} |
} |
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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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stereo = 1; |
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samplewidth *= 2; |
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} |
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else |
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{ |
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stereo = 0; |
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} |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1) |
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{ |
{ |
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perror("SNDCTL_DSP_CHANNELS"); |
perror("SNDCTL_DSP_CHANNELS"); |
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close(g_dsp_fd); |
oss_close(); |
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return False; |
return False; |
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} |
} |
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|
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speed = pwfx->nSamplesPerSec; |
oss_driver.need_resampling = 0; |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &speed) == -1) |
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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perror("SNDCTL_DSP_SPEED"); |
int rates[] = { 44100, 48000, 0 }; |
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close(g_dsp_fd); |
int *prates = rates; |
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return False; |
|
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while (*prates != 0) |
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{ |
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if ((pwfx->nSamplesPerSec != *prates) |
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&& (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, prates) != -1)) |
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{ |
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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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oss_close(); |
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return False; |
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} |
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break; |
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} |
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prates++; |
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} |
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if (*prates == 0) |
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{ |
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perror("SNDCTL_DSP_SPEED"); |
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oss_close(); |
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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 (!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("SNDCTL_DSP_GETOSPACE"); |
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oss_close(); |
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return False; |
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} |
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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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return True; |
return True; |
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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_lo]; |
uint32 volume; |
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unsigned int next_hi = (queue_lo + 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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/* 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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STREAM out; |
STREAM out; |
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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; |
238 |
{ |
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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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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packet = &packet_queue[queue_lo]; |
out->p += len; |
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out = &packet->s; |
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len = write(g_dsp_fd, out->p, out->end-out->p); |
if (out->p == out->end) |
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if (len == -1) |
{ |
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int delay_bytes; |
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unsigned long delay_us; |
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audio_buf_info info; |
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|
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if (in_esddsp) |
264 |
{ |
{ |
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if (errno != EWOULDBLOCK) |
/* EsounD has no way of querying buffer status, so we have to |
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perror("write audio"); |
* go with a fixed size. */ |
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g_dsp_busy = 1; |
delay_bytes = out->size; |
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return; |
|
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} |
} |
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else |
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{ |
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#ifdef SNDCTL_DSP_GETODELAY |
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delay_bytes = 0; |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_GETODELAY, &delay_bytes) == -1) |
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delay_bytes = -1; |
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#else |
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delay_bytes = -1; |
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#endif |
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if (delay_bytes == -1) |
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{ |
281 |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) != -1) |
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delay_bytes = info.fragstotal * info.fragsize - info.bytes; |
283 |
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else |
284 |
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delay_bytes = out->size; |
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} |
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} |
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delay_us = delay_bytes * (1000000 / (samplewidth * snd_rate)); |
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rdpsnd_queue_next(delay_us); |
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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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} |
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return; |
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} |
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struct audio_driver * |
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oss_register(char *options) |
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{ |
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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"); |
311 |
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oss_driver.need_byteswap_on_be = 0; |
312 |
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oss_driver.need_resampling = 0; |
313 |
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oss_driver.next = NULL; |
314 |
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|
315 |
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if (options) |
316 |
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{ |
317 |
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dsp_dev = xstrdup(options); |
318 |
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} |
319 |
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else |
320 |
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{ |
321 |
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dsp_dev = getenv("AUDIODEV"); |
322 |
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|
323 |
out->p += len; |
if (dsp_dev == NULL) |
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if (out->p == out->end) |
|
324 |
{ |
{ |
325 |
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; |
|
326 |
} |
} |
327 |
} |
} |
328 |
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return &oss_driver; |
330 |
} |
} |