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jack2/linux/alsa/alsa_driver.h

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  1. /*

  2.     Copyright (C) 2001 Paul Davis

  3. 

  4.     This program is free software; you can redistribute it and/or modify

  5.     it under the terms of the GNU General Public License as published by

  6.     the Free Software Foundation; either version 2 of the License, or

  7.     (at your option) any later version.

  8. 

  9.     This program is distributed in the hope that it will be useful,

  10.     but WITHOUT ANY WARRANTY; without even the implied warranty of

  11.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  12.     GNU General Public License for more details.

  13. 

  14.     You should have received a copy of the GNU General Public License

  15.     along with this program; if not, write to the Free Software

  16.     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  17. 

  18.     $Id: alsa_driver.h 945 2006-05-04 15:14:45Z pbd $

  19. */

  20. 

  21. #ifndef __jack_alsa_driver_h__

  22. #define __jack_alsa_driver_h__

  23. 

  24. #include <alsa/asoundlib.h>

  25. #include "bitset.h"

  26. 

  27. #if __BYTE_ORDER == __LITTLE_ENDIAN

  28. #define IS_LE 0

  29. #define IS_BE 1

  30. #elif __BYTE_ORDER == __BIG_ENDIAN

  31. #define IS_LE 1

  32. #define IS_BE 0

  33. #endif

  34. 

  35. #define TRUE 1

  36. #define FALSE 0

  37. 

  38. #include "types.h"

  39. #include "hardware.h"

  40. #include "driver.h"

  41. #include "memops.h"

  42. #include "alsa_midi.h"

  43. 

  44. typedef void (*ReadCopyFunction)  (jack_default_audio_sample_t *dst, char *src,

  45.                                    unsigned long src_bytes,

  46.                                    unsigned long src_skip_bytes);

  47. typedef void (*WriteCopyFunction) (char *dst, jack_default_audio_sample_t *src,

  48.                                    unsigned long src_bytes,

  49.                                    unsigned long dst_skip_bytes,

  50.                                    dither_state_t *state);

  51. 

  52. typedef struct _alsa_driver {

  53. 

  54.     JACK_DRIVER_NT_DECL

  55. 

  56.     int                           poll_timeout;

  57.     jack_time_t                   poll_last;

  58.     jack_time_t                   poll_next;

  59.     char                        **playback_addr;

  60.     char                        **capture_addr;

  61.     const snd_pcm_channel_area_t *capture_areas;

  62.     const snd_pcm_channel_area_t *playback_areas;

  63.     struct pollfd                *pfd;

  64.     unsigned int                  playback_nfds;

  65.     unsigned int                  capture_nfds;

  66.     unsigned long                 interleave_unit;

  67.     unsigned long                *capture_interleave_skip;

  68.     unsigned long                *playback_interleave_skip;

  69.     channel_t                     max_nchannels;

  70.     channel_t                     user_nchannels;

  71.     channel_t                     playback_nchannels;

  72.     channel_t                     capture_nchannels;

  73.     unsigned long                 playback_sample_bytes;

  74.     unsigned long                 capture_sample_bytes;

  75. 

  76.     jack_nframes_t                frame_rate;

  77.     jack_nframes_t                frames_per_cycle;

  78.     jack_nframes_t                capture_frame_latency;

  79.     jack_nframes_t                playback_frame_latency;

  80. 

  81.     unsigned long                *silent;

  82.     char                         *alsa_name_playback;

  83.     char                         *alsa_name_capture;

  84.     char                         *alsa_driver;

  85.     bitset_t			  channels_not_done;

  86.     bitset_t			  channels_done;

  87.     snd_pcm_format_t              playback_sample_format;

  88.     snd_pcm_format_t              capture_sample_format;

  89.     float                         max_sample_val;

  90.     unsigned long                 user_nperiods;

  91.     unsigned int                  playback_nperiods;

  92.     unsigned int                  capture_nperiods;

  93.     unsigned long                 last_mask;

  94.     snd_ctl_t                    *ctl_handle;

  95.     snd_pcm_t                    *playback_handle;

  96.     snd_pcm_t                    *capture_handle;

  97.     snd_pcm_hw_params_t          *playback_hw_params;

  98.     snd_pcm_sw_params_t          *playback_sw_params;

  99.     snd_pcm_hw_params_t          *capture_hw_params;

  100.     snd_pcm_sw_params_t          *capture_sw_params;

  101.     jack_hardware_t              *hw;  

  102.     ClockSyncStatus              *clock_sync_data;

  103.     jack_client_t                *client;

  104.     JSList                       *capture_ports;

  105.     JSList                       *playback_ports;

  106.     JSList                       *monitor_ports;

  107. 

  108.     unsigned long input_monitor_mask;

  109. 

  110.     char soft_mode;

  111.     char hw_monitoring;

  112.     char hw_metering;

  113.     char all_monitor_in;

  114.     char capture_and_playback_not_synced;

  115.     char playback_interleaved;

  116.     char capture_interleaved;

  117.     char with_monitor_ports;

  118.     char has_clock_sync_reporting;

  119.     char has_hw_monitoring;

  120.     char has_hw_metering;

  121.     char quirk_bswap;

  122. 

  123.     ReadCopyFunction read_via_copy;

  124.     WriteCopyFunction write_via_copy;

  125. 

  126.     int             dither;

  127.     dither_state_t *dither_state;

  128. 

  129.     SampleClockMode clock_mode;

  130.     JSList *clock_sync_listeners;

  131.     pthread_mutex_t clock_sync_lock;

  132.     unsigned long next_clock_sync_listener_id;

  133. 

  134.     int running;

  135.     int run;

  136. 

  137.     int poll_late;

  138.     int xrun_count;

  139.     int process_count;

  140. 

  141.     alsa_midi_t *midi;

  142.     int xrun_recovery;

  143. 

  144. } alsa_driver_t;

  145. 

  146. static inline void 

  147. alsa_driver_mark_channel_done (alsa_driver_t *driver, channel_t chn) {

  148. 	bitset_remove (driver->channels_not_done, chn);

  149. 	driver->silent[chn] = 0;

  150. }

  151. 

  152. static inline void 

  153. alsa_driver_silence_on_channel (alsa_driver_t *driver, channel_t chn,

  154. 				jack_nframes_t nframes) {

  155. 	if (driver->playback_interleaved) {

  156. 		memset_interleave 

  157. 			(driver->playback_addr[chn],

  158. 			 0, nframes * driver->playback_sample_bytes,

  159. 			 driver->interleave_unit,

  160. 			 driver->playback_interleave_skip[chn]);

  161. 	} else {

  162. 		memset (driver->playback_addr[chn], 0,

  163. 			nframes * driver->playback_sample_bytes);

  164. 	}

  165. 	alsa_driver_mark_channel_done (driver,chn);

  166. }

  167. 

  168. static inline void 

  169. alsa_driver_silence_on_channel_no_mark (alsa_driver_t *driver, channel_t chn,

  170. 					jack_nframes_t nframes) {

  171. 	if (driver->playback_interleaved) {

  172. 		memset_interleave 

  173. 			(driver->playback_addr[chn],

  174. 			 0, nframes * driver->playback_sample_bytes,

  175. 			 driver->interleave_unit,

  176. 			 driver->playback_interleave_skip[chn]);

  177. 	} else {

  178. 		memset (driver->playback_addr[chn], 0,

  179. 			nframes * driver->playback_sample_bytes);

  180. 	}

  181. }

  182. 

  183. static inline void 

  184. alsa_driver_read_from_channel (alsa_driver_t *driver,

  185. 			       channel_t channel,

  186. 			       jack_default_audio_sample_t *buf,

  187. 			       jack_nframes_t nsamples)

  188. {

  189. 	driver->read_via_copy (buf, 

  190. 			       driver->capture_addr[channel],

  191. 			       nsamples, 

  192. 			       driver->capture_interleave_skip[channel]);

  193. }

  194. 

  195. static inline void 

  196. alsa_driver_write_to_channel (alsa_driver_t *driver,

  197. 			      channel_t channel, 

  198. 			      jack_default_audio_sample_t *buf, 

  199. 			      jack_nframes_t nsamples)

  200. {

  201. 	driver->write_via_copy (driver->playback_addr[channel],

  202. 				buf, 

  203. 				nsamples, 

  204. 				driver->playback_interleave_skip[channel],

  205. 				driver->dither_state+channel);

  206. 	alsa_driver_mark_channel_done (driver, channel);

  207. }

  208. 

  209. void  alsa_driver_silence_untouched_channels (alsa_driver_t *driver,

  210. 					      jack_nframes_t nframes);

  211. void  alsa_driver_set_clock_sync_status (alsa_driver_t *driver, channel_t chn,

  212. 					 ClockSyncStatus status);

  213. int   alsa_driver_listen_for_clock_sync_status (alsa_driver_t *,

  214. 						ClockSyncListenerFunction,

  215. 						void *arg);

  216. int   alsa_driver_stop_listen_for_clock_sync_status (alsa_driver_t *,

  217. 						     unsigned int);

  218. void  alsa_driver_clock_sync_notify (alsa_driver_t *, channel_t chn,

  219. 				     ClockSyncStatus);

  220. 

  221. #endif /* __jack_alsa_driver_h__ */