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/* |
/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
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Sound Channel Process Functions - libao-driver |
Sound Channel Process Functions - libao-driver |
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Copyright (C) Matthew Chapman 2003 |
Copyright (C) Matthew Chapman 2003 |
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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 <ao/ao.h> |
#include <ao/ao.h> |
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#include <sys/time.h> |
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#define MAX_QUEUE 10 |
#define MAX_QUEUE 10 |
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#define WAVEOUTBUF 64 |
#define WAVEOUTBUF 16 |
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int g_dsp_fd; |
int g_dsp_fd; |
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ao_device *o_device = NULL; |
ao_device *o_device = NULL; |
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int g_samplerate; |
int g_samplerate; |
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int g_channels; |
int g_channels; |
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BOOL g_dsp_busy = False; |
BOOL g_dsp_busy = False; |
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static BOOL g_reopened; |
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static short g_samplewidth; |
static short g_samplewidth; |
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static struct audio_packet |
static struct audio_packet |
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g_dsp_fd = 0; |
g_dsp_fd = 0; |
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queue_lo = queue_hi = 0; |
queue_lo = queue_hi = 0; |
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g_reopened = True; |
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return True; |
return True; |
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} |
} |
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return False; |
return False; |
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} |
} |
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g_reopened = True; |
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return True; |
return True; |
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} |
} |
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{ |
{ |
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struct audio_packet *packet; |
struct audio_packet *packet; |
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STREAM out; |
STREAM out; |
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unsigned char outbuf[WAVEOUTBUF]; |
char outbuf[WAVEOUTBUF]; |
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int offset, len, i; |
int offset, len, i; |
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static long prev_s, prev_us; |
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unsigned int duration; |
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struct timeval tv; |
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int next_tick; |
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if (g_reopened) |
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{ |
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g_reopened = False; |
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gettimeofday(&tv, NULL); |
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prev_s = tv.tv_sec; |
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prev_us = tv.tv_usec; |
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} |
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if (queue_lo == queue_hi) |
if (queue_lo == queue_hi) |
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{ |
{ |
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packet = &packet_queue[queue_lo]; |
packet = &packet_queue[queue_lo]; |
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out = &packet->s; |
out = &packet->s; |
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if (((queue_lo + 1) % MAX_QUEUE) != queue_hi) |
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{ |
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next_tick = packet_queue[(queue_lo + 1) % MAX_QUEUE].tick; |
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} |
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else |
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{ |
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next_tick = (packet->tick + 65535) % 65536; |
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} |
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len = 0; |
len = 0; |
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if (g_samplerate == 22050) |
if (g_samplerate == 22050) |
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ao_play(o_device, outbuf, len); |
ao_play(o_device, outbuf, len); |
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if (out->p == out->end) |
gettimeofday(&tv, NULL); |
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duration = ((tv.tv_sec - prev_s) * 1000000 + (tv.tv_usec - prev_us)) / 1000; |
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if (packet->tick > next_tick) |
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next_tick += 65536; |
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if ((out->p == out->end) || duration > next_tick - packet->tick + 500) |
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{ |
{ |
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rdpsnd_send_completion(packet->tick, packet->index); |
prev_s = tv.tv_sec; |
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prev_us = tv.tv_usec; |
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if (abs((next_tick - packet->tick) - duration) > 20) |
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{ |
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DEBUG(("duration: %d, calc: %d, ", duration, next_tick - packet->tick)); |
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DEBUG(("last: %d, is: %d, should: %d\n", packet->tick, |
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(packet->tick + duration) % 65536, next_tick % 65536)); |
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} |
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/* Until all drivers are using the windows sound-ticks, we need to |
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substract the 50 ticks added later by rdpsnd.c */ |
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rdpsnd_send_completion(((packet->tick + duration) % 65536) - 50, packet->index); |
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free(out->data); |
free(out->data); |
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queue_lo = (queue_lo + 1) % MAX_QUEUE; |
queue_lo = (queue_lo + 1) % MAX_QUEUE; |
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} |
} |