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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> |
#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 DEFAULTDEVICE "/dev/dsp" |
#define DEFAULTDEVICE "/dev/dsp" |
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#define MAX_LEN 512 |
#define MAX_LEN 512 |
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static int dsp_fd = -1; |
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static BOOL dsp_busy; |
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static int snd_rate; |
static int snd_rate; |
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static short samplewidth; |
static short samplewidth; |
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static char *dsp_dev; |
static char *dsp_dev; |
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static BOOL in_esddsp; |
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/* This is a just a forward declaration */ |
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static struct audio_driver oss_driver; |
static struct audio_driver oss_driver; |
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void oss_play(void); |
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void |
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oss_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv) |
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{ |
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if (dsp_fd == -1) |
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return; |
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if (rdpsnd_queue_empty()) |
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return; |
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FD_SET(dsp_fd, wfds); |
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if (dsp_fd > *n) |
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*n = dsp_fd; |
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} |
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void |
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oss_check_fds(fd_set * rfds, fd_set * wfds) |
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{ |
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if (FD_ISSET(dsp_fd, wfds)) |
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oss_play(); |
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} |
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static BOOL |
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detect_esddsp(void) |
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{ |
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struct stat s; |
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char *preload; |
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if (fstat(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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oss_open(void) |
oss_open(void) |
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{ |
{ |
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if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1) |
if ((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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in_esddsp = detect_esddsp(); |
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return True; |
return True; |
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} |
} |
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void |
void |
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oss_close(void) |
oss_close(void) |
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{ |
{ |
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close(g_dsp_fd); |
close(dsp_fd); |
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dsp_fd = -1; |
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dsp_busy = False; |
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} |
} |
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BOOL |
BOOL |
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int stereo, format, fragments; |
int stereo, format, fragments; |
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static BOOL driver_broken = False; |
static BOOL driver_broken = False; |
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ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL); |
ioctl(dsp_fd, SNDCTL_DSP_RESET, NULL); |
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ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL); |
ioctl(dsp_fd, SNDCTL_DSP_SYNC, NULL); |
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if (pwfx->wBitsPerSample == 8) |
if (pwfx->wBitsPerSample == 8) |
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format = AFMT_U8; |
format = AFMT_U8; |
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samplewidth = pwfx->wBitsPerSample / 8; |
samplewidth = pwfx->wBitsPerSample / 8; |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1) |
if (ioctl(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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stereo = 0; |
stereo = 0; |
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} |
} |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1) |
if (ioctl(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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oss_driver.need_resampling = 0; |
oss_driver.need_resampling = 0; |
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snd_rate = pwfx->nSamplesPerSec; |
snd_rate = pwfx->nSamplesPerSec; |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1) |
if (ioctl(dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1) |
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{ |
{ |
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int rates[] = { 44100, 48000, 0 }; |
int rates[] = { 44100, 48000, 0 }; |
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int *prates = rates; |
int *prates = rates; |
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while (*prates != 0) |
while (*prates != 0) |
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{ |
{ |
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if ((pwfx->nSamplesPerSec != *prates) |
if ((pwfx->nSamplesPerSec != *prates) |
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&& (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, prates) != -1)) |
&& (ioctl(dsp_fd, SNDCTL_DSP_SPEED, prates) != -1)) |
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{ |
{ |
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oss_driver.need_resampling = 1; |
oss_driver.need_resampling = 1; |
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snd_rate = *prates; |
snd_rate = *prates; |
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(snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False) |
(snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False) |
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{ |
{ |
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error("rdpsnd_dsp_resample_set failed"); |
error("rdpsnd_dsp_resample_set failed"); |
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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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if (*prates == 0) |
if (*prates == 0) |
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{ |
{ |
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perror("SNDCTL_DSP_SPEED"); |
perror("SNDCTL_DSP_SPEED"); |
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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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/* try to get 12 fragments of 2^12 bytes size */ |
/* try to get 12 fragments of 2^12 bytes size */ |
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fragments = (12 << 16) + 12; |
fragments = (12 << 16) + 12; |
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ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments); |
ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments); |
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if (!driver_broken) |
if (!driver_broken) |
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{ |
{ |
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audio_buf_info info; |
audio_buf_info info; |
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memset(&info, 0, sizeof(info)); |
memset(&info, 0, sizeof(info)); |
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if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) |
if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) |
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{ |
{ |
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perror("SNDCTL_DSP_GETOSPACE"); |
perror("SNDCTL_DSP_GETOSPACE"); |
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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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volume = left / (65536 / 100); |
volume = left / (65536 / 100); |
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volume |= right / (65536 / 100) << 8; |
volume |= right / (65536 / 100) << 8; |
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if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
if (ioctl(dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
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{ |
{ |
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warning("hardware volume control unavailable, falling back to software volume control!\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; |
oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set; |
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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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static long startedat_us; |
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static long startedat_s; |
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static BOOL started = False; |
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struct timeval tv; |
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/* We shouldn't be called if the queue is empty, but still */ |
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if (rdpsnd_queue_empty()) |
if (rdpsnd_queue_empty()) |
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{ |
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g_dsp_busy = 0; |
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return; |
return; |
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} |
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packet = rdpsnd_queue_current_packet(); |
packet = rdpsnd_queue_current_packet(); |
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out = &packet->s; |
out = &packet->s; |
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if (!started) |
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{ |
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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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len = out->end - out->p; |
len = out->end - out->p; |
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len = write(g_dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len); |
len = write(dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len); |
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if (len == -1) |
if (len == -1) |
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{ |
{ |
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if (errno != EWOULDBLOCK) |
if (errno != EWOULDBLOCK) |
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perror("write audio"); |
perror("write audio"); |
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g_dsp_busy = 1; |
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return; |
return; |
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} |
} |
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out->p += len; |
out->p += len; |
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if (out->p == out->end) |
if (out->p == out->end) |
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{ |
{ |
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long long duration; |
int delay_bytes; |
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long elapsed; |
unsigned long delay_us; |
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audio_buf_info info; |
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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) |
if (in_esddsp) |
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{ |
{ |
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/* We need to add 50 to tell windows that time has passed while |
/* EsounD has no way of querying buffer status, so we have to |
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* playing this packet */ |
* go with a fixed size. */ |
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rdpsnd_send_completion(packet->tick + 50, packet->index); |
delay_bytes = out->size; |
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rdpsnd_queue_next(); |
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started = False; |
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} |
} |
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else |
else |
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{ |
{ |
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g_dsp_busy = 1; |
#ifdef SNDCTL_DSP_GETODELAY |
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return; |
delay_bytes = 0; |
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if (ioctl(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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{ |
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if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) != -1) |
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delay_bytes = info.fragstotal * info.fragsize - info.bytes; |
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else |
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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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g_dsp_busy = 1; |
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return; |
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} |
} |
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struct audio_driver * |
struct audio_driver * |
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oss_register(char *options) |
oss_register(char *options) |
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{ |
{ |
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oss_driver.wave_out_write = rdpsnd_queue_write; |
memset(&oss_driver, 0, sizeof(oss_driver)); |
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oss_driver.name = "oss"; |
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oss_driver.description = |
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"OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV"; |
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oss_driver.add_fds = oss_add_fds; |
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oss_driver.check_fds = oss_check_fds; |
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oss_driver.wave_out_open = oss_open; |
oss_driver.wave_out_open = oss_open; |
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oss_driver.wave_out_close = oss_close; |
oss_driver.wave_out_close = oss_close; |
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oss_driver.wave_out_format_supported = oss_format_supported; |
oss_driver.wave_out_format_supported = oss_format_supported; |
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oss_driver.wave_out_set_format = oss_set_format; |
oss_driver.wave_out_set_format = oss_set_format; |
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oss_driver.wave_out_volume = oss_volume; |
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"); |
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oss_driver.need_byteswap_on_be = 0; |
oss_driver.need_byteswap_on_be = 0; |
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oss_driver.need_resampling = 0; |
oss_driver.need_resampling = 0; |
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oss_driver.next = NULL; |
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if (options) |
if (options) |
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{ |
{ |
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if (dsp_dev == NULL) |
if (dsp_dev == NULL) |
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{ |
{ |
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dsp_dev = xstrdup(DEFAULTDEVICE); |
dsp_dev = DEFAULTDEVICE; |
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} |
} |
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} |
} |
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