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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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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
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Copyright (C) Michael Gernoth mike@zerfleddert.de 2005 |
Copyright (C) Michael Gernoth mike@zerfleddert.de 2005-2006 |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
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*/ |
*/ |
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#include "rdesktop.h" |
#include "rdesktop.h" |
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#include "rdpsnd.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 <ao/ao.h> |
#include <ao/ao.h> |
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#include <sys/time.h> |
#include <sys/time.h> |
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#define MAX_QUEUE 10 |
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#define WAVEOUTBUF 16 |
#define WAVEOUTBUF 16 |
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int g_dsp_fd; |
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BOOL g_dsp_busy = False; |
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static ao_device *o_device = NULL; |
static ao_device *o_device = NULL; |
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static int default_driver; |
static int default_driver; |
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static int samplerate; |
static int samplerate; |
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static BOOL reopened; |
static BOOL reopened; |
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static short samplewidth; |
static short samplewidth; |
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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) |
wave_out_open(void) |
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{ |
{ |
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} |
} |
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g_dsp_fd = 0; |
g_dsp_fd = 0; |
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queue_lo = queue_hi = 0; |
rdpsnd_queue_init(); |
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reopened = True; |
reopened = True; |
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wave_out_close(void) |
wave_out_close(void) |
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{ |
{ |
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/* Ack all remaining packets */ |
/* Ack all remaining packets */ |
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while (queue_lo != queue_hi) |
while (!rdpsnd_queue_empty()) |
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{ |
{ |
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rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index); |
rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick, |
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free(packet_queue[queue_lo].s.data); |
rdpsnd_queue_current_packet()->index); |
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queue_lo = (queue_lo + 1) % MAX_QUEUE; |
rdpsnd_queue_next(); |
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} |
} |
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if (o_device != NULL) |
if (o_device != NULL) |
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} |
} |
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void |
void |
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wave_out_write(STREAM s, uint16 tick, uint8 index) |
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{ |
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struct audio_packet *packet = &packet_queue[queue_hi]; |
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unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; |
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if (next_hi == queue_lo) |
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{ |
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error("No space to queue audio packet\n"); |
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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 |
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wave_out_play(void) |
wave_out_play(void) |
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{ |
{ |
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struct audio_packet *packet; |
struct audio_packet *packet; |
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prev_us = tv.tv_usec; |
prev_us = tv.tv_usec; |
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} |
} |
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if (queue_lo == queue_hi) |
if (rdpsnd_queue_empty()) |
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{ |
{ |
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g_dsp_busy = 0; |
g_dsp_busy = 0; |
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return; |
return; |
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} |
} |
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packet = &packet_queue[queue_lo]; |
packet = rdpsnd_queue_current_packet(); |
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out = &packet->s; |
out = &packet->s; |
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if (((queue_lo + 1) % MAX_QUEUE) != queue_hi) |
next_tick = rdpsnd_queue_next_tick(); |
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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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(packet->tick + duration) % 65536, next_tick % 65536)); |
(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 |
rdpsnd_send_completion(((packet->tick + duration) % 65536), packet->index); |
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substract the 50 ticks added later by rdpsnd.c */ |
rdpsnd_queue_next(); |
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rdpsnd_send_completion(((packet->tick + duration) % 65536) - 50, packet->index); |
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free(out->data); |
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queue_lo = (queue_lo + 1) % MAX_QUEUE; |
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} |
} |
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g_dsp_busy = 1; |
g_dsp_busy = 1; |