/[rdesktop]/jpeg/rdesktop/trunk/rdpsnd_libao.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Diff of /jpeg/rdesktop/trunk/rdpsnd_libao.c

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revision 1290 by stargo, Sun Oct 1 22:30:34 2006 UTC revision 1373 by stargo, Mon Jan 8 12:38:34 2007 UTC
# Line 1  Line 1 
1  /* -*- c-basic-offset: 8 -*-  /* -*- c-basic-offset: 8 -*-
2     rdesktop: A Remote Desktop Protocol client.     rdesktop: A Remote Desktop Protocol client.
3     Sound Channel Process Functions - libao-driver     Sound Channel Process Functions - libao-driver
4     Copyright (C) Matthew Chapman 2003     Copyright (C) Matthew Chapman 2003-2007
5     Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003     Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6     Copyright (C) Michael Gernoth mike@zerfleddert.de 2005-2006     Copyright (C) Michael Gernoth mike@zerfleddert.de 2005-2007
7    
8     This program is free software; you can redistribute it and/or modify     This program is free software; you can redistribute it and/or modify
9     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
# Line 29  Line 29 
29  #include <ao/ao.h>  #include <ao/ao.h>
30  #include <sys/time.h>  #include <sys/time.h>
31    
32  #define WAVEOUTLEN      1024  #define WAVEOUTLEN      16
33    
34  static ao_device *o_device = NULL;  static ao_device *o_device = NULL;
35  static int default_driver;  static int default_driver;
36  static BOOL reopened;  static RD_BOOL reopened;
37  static char *libao_device = NULL;  static char *libao_device = NULL;
38    
39  BOOL  void libao_play(void);
40    
41    void
42    libao_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
43    {
44            /* We need to be called rather often... */
45            FD_SET(0, wfds);
46    }
47    
48    void
49    libao_check_fds(fd_set * rfds, fd_set * wfds)
50    {
51            if (o_device == NULL)
52                    return;
53    
54            if (!rdpsnd_queue_empty())
55                    libao_play();
56    }
57    
58    RD_BOOL
59  libao_open(void)  libao_open(void)
60  {  {
61          ao_sample_format format;          ao_sample_format format;
# Line 64  libao_open(void) Line 83  libao_open(void)
83                  return False;                  return False;
84          }          }
85    
         g_dsp_fd = 0;  
         rdpsnd_queue_init();  
   
86          reopened = True;          reopened = True;
87    
88          return True;          return True;
# Line 78  libao_close(void) Line 94  libao_close(void)
94          /* Ack all remaining packets */          /* Ack all remaining packets */
95          while (!rdpsnd_queue_empty())          while (!rdpsnd_queue_empty())
96          {          {
97                  rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,                  rdpsnd_queue_next(0);
                                        rdpsnd_queue_current_packet()->index);  
                 rdpsnd_queue_next();  
98          }          }
99    
100          if (o_device != NULL)          if (o_device != NULL)
101                  ao_close(o_device);                  ao_close(o_device);
102    
103            o_device = NULL;
104    
105          ao_shutdown();          ao_shutdown();
106  }  }
107    
108  BOOL  RD_BOOL
109  libao_set_format(WAVEFORMATEX * pwfx)  libao_set_format(RD_WAVEFORMATEX * pwfx)
110  {  {
111          ao_sample_format format;          ao_sample_format format;
112    
# Line 137  libao_play(void) Line 153  libao_play(void)
153                  prev_us = tv.tv_usec;                  prev_us = tv.tv_usec;
154          }          }
155    
156            /* We shouldn't be called if the queue is empty, but still */
157          if (rdpsnd_queue_empty())          if (rdpsnd_queue_empty())
         {  
                 g_dsp_busy = 0;  
158                  return;                  return;
         }  
159    
160          packet = rdpsnd_queue_current_packet();          packet = rdpsnd_queue_current_packet();
161          out = &packet->s;          out = &packet->s;
# Line 161  libao_play(void) Line 175  libao_play(void)
175    
176          if ((out->p == out->end) || duration > next_tick - packet->tick + 500)          if ((out->p == out->end) || duration > next_tick - packet->tick + 500)
177          {          {
178                    unsigned int delay_us;
179    
180                  prev_s = tv.tv_sec;                  prev_s = tv.tv_sec;
181                  prev_us = tv.tv_usec;                  prev_us = tv.tv_usec;
182    
# Line 171  libao_play(void) Line 187  libao_play(void)
187                                 (packet->tick + duration) % 65536, next_tick % 65536));                                 (packet->tick + duration) % 65536, next_tick % 65536));
188                  }                  }
189    
190                  rdpsnd_send_completion(((packet->tick + duration) % 65536), packet->index);                  delay_us = ((out->size / 4) * (1000000 / 44100));
                 rdpsnd_queue_next();  
         }  
191    
192          g_dsp_busy = 1;                  rdpsnd_queue_next(delay_us);
193          return;          }
194  }  }
195    
196  struct audio_driver *  struct audio_driver *
197  libao_register(char *options)  libao_register(char *options)
198  {  {
199          static struct audio_driver libao_driver;          static struct audio_driver libao_driver;
         struct ao_info *libao_info;  
         static char description[101];  
200    
201          libao_driver.wave_out_write = rdpsnd_queue_write;          memset(&libao_driver, 0, sizeof(libao_driver));
202    
203            libao_driver.name = "libao";
204            libao_driver.description = "libao output driver, default device: system dependent";
205    
206            libao_driver.add_fds = libao_add_fds;
207            libao_driver.check_fds = libao_check_fds;
208    
209          libao_driver.wave_out_open = libao_open;          libao_driver.wave_out_open = libao_open;
210          libao_driver.wave_out_close = libao_close;          libao_driver.wave_out_close = libao_close;
211          libao_driver.wave_out_format_supported = rdpsnd_dsp_resample_supported;          libao_driver.wave_out_format_supported = rdpsnd_dsp_resample_supported;
212          libao_driver.wave_out_set_format = libao_set_format;          libao_driver.wave_out_set_format = libao_set_format;
213          libao_driver.wave_out_volume = rdpsnd_dsp_softvol_set;          libao_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
214          libao_driver.wave_out_play = libao_play;  
         libao_driver.name = xstrdup("libao");  
         libao_driver.description = description;  
215          libao_driver.need_byteswap_on_be = 1;          libao_driver.need_byteswap_on_be = 1;
216          libao_driver.need_resampling = 1;          libao_driver.need_resampling = 1;
         libao_driver.next = NULL;  
   
         ao_initialize();  
   
         libao_info = ao_driver_info(ao_default_driver_id());  
   
         if (libao_info)  
         {  
                 snprintf(description, 100, "libao output driver, default device: %s",  
                          libao_info->short_name);  
         }  
         else  
         {  
                 snprintf(description, 100, "libao output driver, default device: none");  
         }  
   
         ao_shutdown();  
217    
218          if (options)          if (options)
219          {          {
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