/[rdesktop]/sourceforge.net/rdesktop/trunk/rdpsnd.c
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revision 1274 by stargo, Sun Oct 1 11:00:03 2006 UTC revision 1340 by ossman_, Wed Dec 6 13:11:35 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 28  Line 30 
30  #define RDPSND_SET_VOLUME       3  #define RDPSND_SET_VOLUME       3
31  #define RDPSND_UNKNOWN4         4  #define RDPSND_UNKNOWN4         4
32  #define RDPSND_COMPLETION       5  #define RDPSND_COMPLETION       5
33  #define RDPSND_SERVERTICK       6  #define RDPSND_PING                     6
34  #define RDPSND_NEGOTIATE        7  #define RDPSND_NEGOTIATE        7
35    
36  #define MAX_FORMATS             10  #define MAX_FORMATS             10
# 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 88  rdpsnd_send_completion(uint16 tick, uint Line 95  rdpsnd_send_completion(uint16 tick, uint
95  static void  static void
96  rdpsnd_process_negotiate(STREAM in)  rdpsnd_process_negotiate(STREAM in)
97  {  {
98          unsigned int in_format_count, i;          uint16 in_format_count, i;
99            uint8 pad;
100            uint16 version;
101          WAVEFORMATEX *format;          WAVEFORMATEX *format;
102          STREAM out;          STREAM out;
103          BOOL device_available = False;          BOOL device_available = False;
104          int readcnt;          int readcnt;
105          int discardcnt;          int discardcnt;
106    
107          in_uint8s(in, 14);      /* flags, volume, pitch, UDP port */          in_uint8s(in, 14);      /* initial bytes not valid from server */
108          in_uint16_le(in, in_format_count);          in_uint16_le(in, in_format_count);
109          in_uint8s(in, 4);       /* pad, status, pad */          in_uint8(in, pad);
110            in_uint16_le(in, version);
111            in_uint8s(in, 1);       /* padding */
112    
113          if (current_driver->wave_out_open())          if (current_driver->wave_out_open())
114          {          {
# Line 148  rdpsnd_process_negotiate(STREAM in) Line 159  rdpsnd_process_negotiate(STREAM in)
159          out_uint16(out, 0);     /* UDP port */          out_uint16(out, 0);     /* UDP port */
160    
161          out_uint16_le(out, format_count);          out_uint16_le(out, format_count);
162          out_uint8(out, 0x95);   /* pad? */          out_uint8(out, 0);      /* padding */
163          out_uint16_le(out, 2);  /* status */          out_uint16_le(out, 2);  /* version */
164          out_uint8(out, 0x77);   /* pad? */          out_uint8(out, 0);      /* padding */
165    
166          for (i = 0; i < format_count; i++)          for (i = 0; i < format_count; i++)
167          {          {
# Line 169  rdpsnd_process_negotiate(STREAM in) Line 180  rdpsnd_process_negotiate(STREAM in)
180  }  }
181    
182  static void  static void
183  rdpsnd_process_servertick(STREAM in)  rdpsnd_process_ping(STREAM in)
184  {  {
185          uint16 tick1, tick2;          uint16 tick;
186          STREAM out;          STREAM out;
187    
188          /* in_uint8s(in, 4); unknown */          in_uint16_le(in, tick);
189          in_uint16_le(in, tick1);  
190          in_uint16_le(in, tick2);          out = rdpsnd_init_packet(RDPSND_PING | 0x2300, 4);
191            out_uint16_le(out, tick);
192          out = rdpsnd_init_packet(RDPSND_SERVERTICK | 0x2300, 4);          out_uint16_le(out, 0);
         out_uint16_le(out, tick1);  
         out_uint16_le(out, tick2);  
193          s_mark_end(out);          s_mark_end(out);
194          rdpsnd_send(out);          rdpsnd_send(out);
195  }  }
# Line 230  rdpsnd_process(STREAM s) Line 239  rdpsnd_process(STREAM s)
239                  /* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */                  /* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */
240                  memcpy(s->data, missing_bytes, 4);                  memcpy(s->data, missing_bytes, 4);
241    
242                  current_driver->                  rdpsnd_queue_write(rdpsnd_dsp_process
243                          wave_out_write(rdpsnd_dsp_process                                     (s, current_driver, &formats[current_format]), tick,
244                                         (s, current_driver, &formats[current_format]), tick,                                     packet_index);
                                        packet_index);  
245                  awaiting_data_packet = False;                  awaiting_data_packet = False;
246                  return;                  return;
247          }          }
# Line 259  rdpsnd_process(STREAM s) Line 267  rdpsnd_process(STREAM s)
267                  case RDPSND_NEGOTIATE:                  case RDPSND_NEGOTIATE:
268                          rdpsnd_process_negotiate(s);                          rdpsnd_process_negotiate(s);
269                          break;                          break;
270                  case RDPSND_SERVERTICK:                  case RDPSND_PING:
271                          rdpsnd_process_servertick(s);                          rdpsnd_process_ping(s);
272                          break;                          break;
273                  case RDPSND_SET_VOLUME:                  case RDPSND_SET_VOLUME:
274                          in_uint32(s, volume);                          in_uint32(s, volume);
# Line 316  rdpsnd_register_drivers(char *options) Line 324  rdpsnd_register_drivers(char *options)
324          reg = &drivers;          reg = &drivers;
325  #if defined(RDPSND_ALSA)  #if defined(RDPSND_ALSA)
326          *reg = alsa_register(options);          *reg = alsa_register(options);
327            assert(*reg);
328          reg = &((*reg)->next);          reg = &((*reg)->next);
329  #endif  #endif
330  #if defined(RDPSND_SUN)  #if defined(RDPSND_SUN)
331          *reg = sun_register(options);          *reg = sun_register(options);
332            assert(*reg);
333          reg = &((*reg)->next);          reg = &((*reg)->next);
334  #endif  #endif
335  #if defined(RDPSND_OSS)  #if defined(RDPSND_OSS)
336          *reg = oss_register(options);          *reg = oss_register(options);
337            assert(*reg);
338          reg = &((*reg)->next);          reg = &((*reg)->next);
339  #endif  #endif
340  #if defined(RDPSND_SGI)  #if defined(RDPSND_SGI)
341          *reg = sgi_register(options);          *reg = sgi_register(options);
342            assert(*reg);
343          reg = &((*reg)->next);          reg = &((*reg)->next);
344  #endif  #endif
345  #if defined(RDPSND_LIBAO)  #if defined(RDPSND_LIBAO)
346          *reg = libao_register(options);          *reg = libao_register(options);
347            assert(*reg);
348          reg = &((*reg)->next);          reg = &((*reg)->next);
349  #endif  #endif
350            *reg = NULL;
351  }  }
352    
353  BOOL  BOOL
# Line 355  rdpsnd_init(char *optarg) Line 369  rdpsnd_init(char *optarg)
369                  return False;                  return False;
370          }          }
371    
372            rdpsnd_queue_init();
373    
374          if (optarg != NULL && strlen(optarg) > 0)          if (optarg != NULL && strlen(optarg) > 0)
375          {          {
376                  driver = options = optarg;                  driver = options = optarg;
# Line 416  rdpsnd_play(void) Line 432  rdpsnd_play(void)
432          current_driver->wave_out_play();          current_driver->wave_out_play();
433  }  }
434    
435  inline void  void
436    rdpsnd_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
437    {
438            long next_pending;
439    
440            if (g_dsp_busy)
441            {
442                    FD_SET(g_dsp_fd, wfds);
443                    *n = (g_dsp_fd > *n) ? g_dsp_fd : *n;
444            }
445    
446            next_pending = rdpsnd_queue_next_completion();
447            if (next_pending >= 0)
448            {
449                    long cur_timeout;
450    
451                    cur_timeout = tv->tv_sec * 1000000 + tv->tv_usec;
452                    if (cur_timeout > next_pending)
453                    {
454                            tv->tv_sec = next_pending / 1000000;
455                            tv->tv_usec = next_pending % 1000000;
456                    }
457            }
458    }
459    
460    void
461    rdpsnd_check_fds(fd_set * rfds, fd_set * wfds)
462    {
463            rdpsnd_queue_complete_pending();
464    
465            if (g_dsp_busy && FD_ISSET(g_dsp_fd, wfds))
466                    rdpsnd_play();
467    }
468    
469    static void
470  rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)  rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)
471  {  {
472          struct audio_packet *packet = &packet_queue[queue_hi];          struct audio_packet *packet = &packet_queue[queue_hi];
473          unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;          unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
474    
475          if (next_hi == queue_lo)          if (next_hi == queue_pending)
476          {          {
477                  error("No space to queue audio packet\n");                  error("No space to queue audio packet\n");
478                  return;                  return;
# Line 434  rdpsnd_queue_write(STREAM s, uint16 tick Line 484  rdpsnd_queue_write(STREAM s, uint16 tick
484          packet->tick = tick;          packet->tick = tick;
485          packet->index = index;          packet->index = index;
486    
487            gettimeofday(&packet->arrive_tv, NULL);
488    
489          if (!g_dsp_busy)          if (!g_dsp_busy)
490                  current_driver->wave_out_play();                  current_driver->wave_out_play();
491  }  }
492    
493  inline struct audio_packet *  struct audio_packet *
494  rdpsnd_queue_current_packet(void)  rdpsnd_queue_current_packet(void)
495  {  {
496          return &packet_queue[queue_lo];          return &packet_queue[queue_lo];
497  }  }
498    
499  inline BOOL  BOOL
500  rdpsnd_queue_empty(void)  rdpsnd_queue_empty(void)
501  {  {
502          return (queue_lo == queue_hi);          return (queue_lo == queue_hi);
503  }  }
504    
505  inline void  static void
506  rdpsnd_queue_init(void)  rdpsnd_queue_init(void)
507  {  {
508          queue_lo = queue_hi = 0;          queue_pending = queue_lo = queue_hi = 0;
509  }  }
510    
511  inline void  void
512  rdpsnd_queue_next(void)  rdpsnd_queue_next(unsigned long completed_in_us)
513  {  {
514          xfree(packet_queue[queue_lo].s.data);          struct audio_packet *packet;
515    
516            assert(!rdpsnd_queue_empty());
517    
518            packet = &packet_queue[queue_lo];
519    
520            gettimeofday(&packet->completion_tv, NULL);
521    
522            packet->completion_tv.tv_usec += completed_in_us;
523            packet->completion_tv.tv_sec += packet->completion_tv.tv_usec / 1000000;
524            packet->completion_tv.tv_usec %= 1000000;
525    
526          queue_lo = (queue_lo + 1) % MAX_QUEUE;          queue_lo = (queue_lo + 1) % MAX_QUEUE;
527    
528            rdpsnd_queue_complete_pending();
529  }  }
530    
531  inline int  int
532  rdpsnd_queue_next_tick(void)  rdpsnd_queue_next_tick(void)
533  {  {
534          if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)          if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)
# Line 475  rdpsnd_queue_next_tick(void) Line 540  rdpsnd_queue_next_tick(void)
540                  return (packet_queue[queue_lo].tick + 65535) % 65536;                  return (packet_queue[queue_lo].tick + 65535) % 65536;
541          }          }
542  }  }
543    
544    static void
545    rdpsnd_queue_complete_pending(void)
546    {
547            struct timeval now;
548            long elapsed;
549            struct audio_packet *packet;
550    
551            gettimeofday(&now, NULL);
552    
553            while (queue_pending != queue_lo)
554            {
555                    packet = &packet_queue[queue_pending];
556    
557                    if (now.tv_sec < packet->completion_tv.tv_sec)
558                            break;
559    
560                    if ((now.tv_sec == packet->completion_tv.tv_sec) &&
561                        (now.tv_usec < packet->completion_tv.tv_usec))
562                            break;
563    
564                    elapsed = (packet->completion_tv.tv_sec - packet->arrive_tv.tv_sec) * 1000000 +
565                            (packet->completion_tv.tv_usec - packet->arrive_tv.tv_usec);
566                    elapsed /= 1000;
567    
568                    xfree(packet->s.data);
569                    rdpsnd_send_completion((packet->tick + elapsed) % 65536, packet->index);
570                    queue_pending = (queue_pending + 1) % MAX_QUEUE;
571            }
572    }
573    
574    static long
575    rdpsnd_queue_next_completion(void)
576    {
577            struct audio_packet *packet;
578            long remaining;
579            struct timeval now;
580    
581            if (queue_pending == queue_lo)
582                    return -1;
583    
584            gettimeofday(&now, NULL);
585    
586            packet = &packet_queue[queue_pending];
587    
588            remaining = (packet->completion_tv.tv_sec - now.tv_sec) * 1000000 +
589                    (packet->completion_tv.tv_usec - now.tv_usec);
590    
591            if (remaining < 0)
592                    return 0;
593    
594            return remaining;
595    }
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