/[rdesktop]/sourceforge.net/rdesktop/trunk/rdpsnd.c
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revision 1263 by stargo, Sun Sep 17 18:08:51 2006 UTC revision 1337 by ossman_, Wed Dec 6 12:31:58 2006 UTC
# Line 19  Line 19 
19     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */  */
21    
22    #include <assert.h>
23    
24  #include "rdesktop.h"  #include "rdesktop.h"
25  #include "rdpsnd.h"  #include "rdpsnd.h"
26  #include "rdpsnd_dsp.h"  #include "rdpsnd_dsp.h"
# Line 45  static BOOL device_open; Line 47  static BOOL device_open;
47  static WAVEFORMATEX formats[MAX_FORMATS];  static WAVEFORMATEX formats[MAX_FORMATS];
48  static unsigned int format_count;  static unsigned int format_count;
49  static unsigned int current_format;  static unsigned int current_format;
50  unsigned int queue_hi, queue_lo;  unsigned int queue_hi, queue_lo, queue_pending;
51  struct audio_packet packet_queue[MAX_QUEUE];  struct audio_packet packet_queue[MAX_QUEUE];
52    
53  void (*wave_out_play) (void);  void (*wave_out_play) (void);
54    
55    static void rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index);
56    static void rdpsnd_queue_init(void);
57    static void rdpsnd_queue_complete_pending(void);
58    static long rdpsnd_queue_next_completion(void);
59    
60  static STREAM  static STREAM
61  rdpsnd_init_packet(uint16 type, uint16 size)  rdpsnd_init_packet(uint16 type, uint16 size)
62  {  {
# Line 72  rdpsnd_send(STREAM s) Line 79  rdpsnd_send(STREAM s)
79          channel_send(s, rdpsnd_channel);          channel_send(s, rdpsnd_channel);
80  }  }
81    
82  void  static void
83  rdpsnd_send_completion(uint16 tick, uint8 packet_index)  rdpsnd_send_completion(uint16 tick, uint8 packet_index)
84  {  {
85          STREAM s;          STREAM s;
# Line 194  rdpsnd_process(STREAM s) Line 201  rdpsnd_process(STREAM s)
201          static uint16 tick, format;          static uint16 tick, format;
202          static uint8 packet_index;          static uint8 packet_index;
203          static BOOL awaiting_data_packet;          static BOOL awaiting_data_packet;
204            static unsigned char missing_bytes[4] = { 0, 0, 0, 0 };
205    
206  #ifdef RDPSND_DEBUG  #ifdef RDPSND_DEBUG
207          printf("RDPSND recv:\n");          printf("RDPSND recv:\n");
# Line 226  rdpsnd_process(STREAM s) Line 234  rdpsnd_process(STREAM s)
234                          current_format = format;                          current_format = format;
235                  }                  }
236    
237                  current_driver->                  /* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */
238                          wave_out_write(rdpsnd_dsp_process                  memcpy(s->data, missing_bytes, 4);
239                                         (s, current_driver, &formats[current_format]), tick,  
240                                         packet_index);                  rdpsnd_queue_write(rdpsnd_dsp_process
241                                       (s, current_driver, &formats[current_format]), tick,
242                                       packet_index);
243                  awaiting_data_packet = False;                  awaiting_data_packet = False;
244                  return;                  return;
245          }          }
# Line 244  rdpsnd_process(STREAM s) Line 254  rdpsnd_process(STREAM s)
254                          in_uint16_le(s, tick);                          in_uint16_le(s, tick);
255                          in_uint16_le(s, format);                          in_uint16_le(s, format);
256                          in_uint8(s, packet_index);                          in_uint8(s, packet_index);
257                            /* Here are our lost bytes, but why? */
258                            memcpy(missing_bytes, s->end - 4, 4);
259                          awaiting_data_packet = True;                          awaiting_data_packet = True;
260                          break;                          break;
261                  case RDPSND_CLOSE:                  case RDPSND_CLOSE:
# Line 270  rdpsnd_process(STREAM s) Line 282  rdpsnd_process(STREAM s)
282          }          }
283  }  }
284    
285  BOOL  static BOOL
 rdpsnd_init(void)  
 {  
         rdpsnd_channel =  
                 channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,  
                                  rdpsnd_process);  
   
         return (rdpsnd_channel != NULL);  
 }  
   
 BOOL  
286  rdpsnd_auto_open(void)  rdpsnd_auto_open(void)
287  {  {
288          current_driver = drivers;          static BOOL failed = False;
289          while (current_driver != NULL)  
290            if (!failed)
291          {          {
292                  DEBUG(("trying %s...\n", current_driver->name));                  struct audio_driver *auto_driver = current_driver;
293                  if (current_driver->wave_out_open())  
294                    current_driver = drivers;
295                    while (current_driver != NULL)
296                  {                  {
297                          DEBUG(("selected %s\n", current_driver->name));                          DEBUG(("trying %s...\n", current_driver->name));
298                          return True;                          if (current_driver->wave_out_open())
299                            {
300                                    DEBUG(("selected %s\n", current_driver->name));
301                                    return True;
302                            }
303                            g_dsp_fd = 0;
304                            current_driver = current_driver->next;
305                  }                  }
                 g_dsp_fd = 0;  
                 current_driver = current_driver->next;  
         }  
306    
307          warning("no working audio-driver found\n");                  warning("no working audio-driver found\n");
308                    failed = True;
309                    current_driver = auto_driver;
310            }
311    
312          return False;          return False;
313  }  }
314    
315  void  static void
316  rdpsnd_register_drivers(char *options)  rdpsnd_register_drivers(char *options)
317  {  {
318          struct audio_driver **reg;          struct audio_driver **reg;
# Line 311  rdpsnd_register_drivers(char *options) Line 322  rdpsnd_register_drivers(char *options)
322          reg = &drivers;          reg = &drivers;
323  #if defined(RDPSND_ALSA)  #if defined(RDPSND_ALSA)
324          *reg = alsa_register(options);          *reg = alsa_register(options);
325          reg = &((*reg)->next);          assert(*reg);
 #endif  
 #if defined(RDPSND_OSS)  
         *reg = oss_register(options);  
326          reg = &((*reg)->next);          reg = &((*reg)->next);
327  #endif  #endif
328  #if defined(RDPSND_SUN)  #if defined(RDPSND_SUN)
329          *reg = sun_register(options);          *reg = sun_register(options);
330            assert(*reg);
331            reg = &((*reg)->next);
332    #endif
333    #if defined(RDPSND_OSS)
334            *reg = oss_register(options);
335            assert(*reg);
336          reg = &((*reg)->next);          reg = &((*reg)->next);
337  #endif  #endif
338  #if defined(RDPSND_SGI)  #if defined(RDPSND_SGI)
339          *reg = sgi_register(options);          *reg = sgi_register(options);
340            assert(*reg);
341          reg = &((*reg)->next);          reg = &((*reg)->next);
342  #endif  #endif
343  #if defined(RDPSND_LIBAO)  #if defined(RDPSND_LIBAO)
344          *reg = libao_register(options);          *reg = libao_register(options);
345            assert(*reg);
346          reg = &((*reg)->next);          reg = &((*reg)->next);
347  #endif  #endif
348            *reg = NULL;
349  }  }
350    
351  BOOL  BOOL
352  rdpsnd_select_driver(char *driver, char *options)  rdpsnd_init(char *optarg)
353  {  {
354          static struct audio_driver auto_driver;          static struct audio_driver auto_driver;
355          struct audio_driver *pos;          struct audio_driver *pos;
356            char *driver = NULL, *options = NULL;
357    
358          drivers = NULL;          drivers = NULL;
359    
360            rdpsnd_channel =
361                    channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,
362                                     rdpsnd_process);
363    
364            if (rdpsnd_channel == NULL)
365            {
366                    error("channel_register\n");
367                    return False;
368            }
369    
370            rdpsnd_queue_init();
371    
372            if (optarg != NULL && strlen(optarg) > 0)
373            {
374                    driver = options = optarg;
375    
376                    while (*options != '\0' && *options != ':')
377                            options++;
378    
379                    if (*options == ':')
380                    {
381                            *options = '\0';
382                            options++;
383                    }
384    
385                    if (*options == '\0')
386                            options = NULL;
387            }
388    
389          rdpsnd_register_drivers(options);          rdpsnd_register_drivers(options);
390    
391          if (!driver)          if (!driver)
# Line 376  rdpsnd_show_help(void) Line 424  rdpsnd_show_help(void)
424          }          }
425  }  }
426    
427  inline void  void
428  rdpsnd_play(void)  rdpsnd_play(void)
429  {  {
430          current_driver->wave_out_play();          current_driver->wave_out_play();
431  }  }
432    
433  void  void
434    rdpsnd_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
435    {
436            long next_pending;
437    
438            if (g_dsp_busy)
439            {
440                    FD_SET(g_dsp_fd, wfds);
441                    *n = (g_dsp_fd > *n) ? g_dsp_fd : *n;
442            }
443    
444            next_pending = rdpsnd_queue_next_completion();
445            if (next_pending >= 0)
446            {
447                    long cur_timeout;
448    
449                    cur_timeout = tv->tv_sec * 1000000 + tv->tv_usec;
450                    if (cur_timeout > next_pending)
451                    {
452                            tv->tv_sec = next_pending / 1000000;
453                            tv->tv_usec = next_pending % 1000000;
454                    }
455            }
456    }
457    
458    void
459    rdpsnd_check_fds(fd_set * rfds, fd_set * wfds)
460    {
461            rdpsnd_queue_complete_pending();
462    
463            if (g_dsp_busy && FD_ISSET(g_dsp_fd, wfds))
464                    rdpsnd_play();
465    }
466    
467    static void
468  rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)  rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)
469  {  {
470          struct audio_packet *packet = &packet_queue[queue_hi];          struct audio_packet *packet = &packet_queue[queue_hi];
471          unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;          unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
472    
473          if (next_hi == queue_lo)          if (next_hi == queue_pending)
474          {          {
475                  error("No space to queue audio packet\n");                  error("No space to queue audio packet\n");
476                  return;                  return;
# Line 400  rdpsnd_queue_write(STREAM s, uint16 tick Line 482  rdpsnd_queue_write(STREAM s, uint16 tick
482          packet->tick = tick;          packet->tick = tick;
483          packet->index = index;          packet->index = index;
484    
485            gettimeofday(&packet->arrive_tv, NULL);
486    
487          if (!g_dsp_busy)          if (!g_dsp_busy)
488                  current_driver->wave_out_play();                  current_driver->wave_out_play();
489  }  }
490    
491  inline struct audio_packet *  struct audio_packet *
492  rdpsnd_queue_current_packet(void)  rdpsnd_queue_current_packet(void)
493  {  {
494          return &packet_queue[queue_lo];          return &packet_queue[queue_lo];
495  }  }
496    
497  inline BOOL  BOOL
498  rdpsnd_queue_empty(void)  rdpsnd_queue_empty(void)
499  {  {
500          return (queue_lo == queue_hi);          return (queue_lo == queue_hi);
501  }  }
502    
503  inline void  static void
504  rdpsnd_queue_init(void)  rdpsnd_queue_init(void)
505  {  {
506          queue_lo = queue_hi = 0;          queue_pending = queue_lo = queue_hi = 0;
507  }  }
508    
509  inline void  void
510  rdpsnd_queue_next(void)  rdpsnd_queue_next(unsigned long completed_in_us)
511  {  {
512          xfree(packet_queue[queue_lo].s.data);          struct audio_packet *packet;
513    
514            assert(!rdpsnd_queue_empty());
515    
516            packet = &packet_queue[queue_lo];
517    
518            gettimeofday(&packet->completion_tv, NULL);
519    
520            packet->completion_tv.tv_usec += completed_in_us;
521            packet->completion_tv.tv_sec += packet->completion_tv.tv_usec / 1000000;
522            packet->completion_tv.tv_usec %= 1000000;
523    
524          queue_lo = (queue_lo + 1) % MAX_QUEUE;          queue_lo = (queue_lo + 1) % MAX_QUEUE;
525    
526            rdpsnd_queue_complete_pending();
527  }  }
528    
529  inline int  int
530  rdpsnd_queue_next_tick(void)  rdpsnd_queue_next_tick(void)
531  {  {
532          if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)          if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)
# Line 441  rdpsnd_queue_next_tick(void) Line 538  rdpsnd_queue_next_tick(void)
538                  return (packet_queue[queue_lo].tick + 65535) % 65536;                  return (packet_queue[queue_lo].tick + 65535) % 65536;
539          }          }
540  }  }
541    
542    static void
543    rdpsnd_queue_complete_pending(void)
544    {
545            struct timeval now;
546            long elapsed;
547            struct audio_packet *packet;
548    
549            gettimeofday(&now, NULL);
550    
551            while (queue_pending != queue_lo)
552            {
553                    packet = &packet_queue[queue_pending];
554    
555                    if (now.tv_sec < packet->completion_tv.tv_sec)
556                            break;
557    
558                    if ((now.tv_sec == packet->completion_tv.tv_sec) &&
559                        (now.tv_usec < packet->completion_tv.tv_usec))
560                            break;
561    
562                    elapsed = (packet->completion_tv.tv_sec - packet->arrive_tv.tv_sec) * 1000000 +
563                            (packet->completion_tv.tv_usec - packet->arrive_tv.tv_usec);
564                    elapsed /= 1000;
565    
566                    xfree(packet->s.data);
567                    rdpsnd_send_completion((packet->tick + elapsed) % 65536, packet->index);
568                    queue_pending = (queue_pending + 1) % MAX_QUEUE;
569            }
570    }
571    
572    static long
573    rdpsnd_queue_next_completion(void)
574    {
575            struct audio_packet *packet;
576            long remaining;
577            struct timeval now;
578    
579            if (queue_pending == queue_lo)
580                    return -1;
581    
582            gettimeofday(&now, NULL);
583    
584            packet = &packet_queue[queue_pending];
585    
586            remaining = (packet->completion_tv.tv_sec - now.tv_sec) * 1000000 +
587                    (packet->completion_tv.tv_usec - now.tv_usec);
588    
589            if (remaining < 0)
590                    return 0;
591    
592            return remaining;
593    }
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