seq_clientmgr.h 2.9 KB

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  1. /*
  2. * ALSA sequencer Client Manager
  3. * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
  4. *
  5. *
  6. * This program is free software; you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License as published by
  8. * the Free Software Foundation; either version 2 of the License, or
  9. * (at your option) any later version.
  10. *
  11. * This program is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with this program; if not, write to the Free Software
  18. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19. *
  20. */
  21. #ifndef __SND_SEQ_CLIENTMGR_H
  22. #define __SND_SEQ_CLIENTMGR_H
  23. #include <sound/seq_kernel.h>
  24. #include <linux/bitops.h>
  25. #include "seq_fifo.h"
  26. #include "seq_ports.h"
  27. #include "seq_lock.h"
  28. /* client manager */
  29. struct snd_seq_user_client {
  30. struct file *file; /* file struct of client */
  31. /* ... */
  32. /* fifo */
  33. struct snd_seq_fifo *fifo; /* queue for incoming events */
  34. int fifo_pool_size;
  35. };
  36. struct snd_seq_kernel_client {
  37. /* ... */
  38. };
  39. struct snd_seq_client {
  40. snd_seq_client_type_t type;
  41. unsigned int accept_input: 1,
  42. accept_output: 1;
  43. char name[64]; /* client name */
  44. int number; /* client number */
  45. unsigned int filter; /* filter flags */
  46. DECLARE_BITMAP(event_filter, 256);
  47. snd_use_lock_t use_lock;
  48. int event_lost;
  49. /* ports */
  50. int num_ports; /* number of ports */
  51. struct list_head ports_list_head;
  52. rwlock_t ports_lock;
  53. struct mutex ports_mutex;
  54. int convert32; /* convert 32->64bit */
  55. /* output pool */
  56. struct snd_seq_pool *pool; /* memory pool for this client */
  57. union {
  58. struct snd_seq_user_client user;
  59. struct snd_seq_kernel_client kernel;
  60. } data;
  61. };
  62. /* usage statistics */
  63. struct snd_seq_usage {
  64. int cur;
  65. int peak;
  66. };
  67. int client_init_data(void);
  68. int snd_sequencer_device_init(void);
  69. void snd_sequencer_device_done(void);
  70. /* get locked pointer to client */
  71. struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
  72. /* unlock pointer to client */
  73. #define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
  74. /* dispatch event to client(s) */
  75. int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
  76. /* exported to other modules */
  77. int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
  78. int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
  79. struct file *file, int atomic, int hop);
  80. int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
  81. int snd_seq_client_notify_subscription(int client, int port,
  82. struct snd_seq_port_subscribe *info, int evtype);
  83. #endif