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jack1/drivers/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. */

  19. 

  20. #ifndef __jack_alsa_driver_h__

  21. #define __jack_alsa_driver_h__

  22. 

  23. #include <alsa/asoundlib.h>

  24. #include <alsa/pcm.h>

  25. #include <jack/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. #include <jack/types.h>

  36. #include <jack/hardware.h>

  37. #include <jack/driver.h>

  38. #include <jack/jack.h>

  39. #include <jack/memops.h>

  40. 

  41. #include "../alsa-midi/alsa_midi.h"

  42. 

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

  44. 				   unsigned long src_bytes,

  45. 				   unsigned long src_skip_bytes);

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

  47. 				   unsigned long src_bytes,

  48. 				   unsigned long dst_skip_bytes,

  49. 				   dither_state_t *state);

  50. typedef void (*CopyCopyFunction)  (char *dst, char *src,

  51. 				   unsigned long src_bytes,

  52. 				   unsigned long dst_skip_bytes,

  53. 				   unsigned long src_skip_byte);

  54. 

  55. typedef struct _alsa_driver {

  56. 

  57.     JACK_DRIVER_NT_DECL

  58. 

  59.     int                           poll_timeout;

  60.     jack_time_t                   poll_last;

  61.     jack_time_t                   poll_next;

  62.     char                        **playback_addr;

  63.     char                        **capture_addr;

  64.     const snd_pcm_channel_area_t *capture_areas;

  65.     const snd_pcm_channel_area_t *playback_areas;

  66.     struct pollfd                *pfd;

  67.     unsigned int                  playback_nfds;

  68.     unsigned int                  capture_nfds;

  69.     unsigned long                 interleave_unit;

  70.     unsigned long                *capture_interleave_skip;

  71.     unsigned long                *playback_interleave_skip;

  72.     channel_t                     max_nchannels;

  73.     channel_t                     user_nchannels;

  74.     channel_t                     playback_nchannels;

  75.     channel_t                     capture_nchannels;

  76.     unsigned long                 playback_sample_bytes;

  77.     unsigned long                 capture_sample_bytes;

  78. 

  79.     jack_nframes_t                frame_rate;

  80.     jack_nframes_t                frames_per_cycle;

  81.     jack_nframes_t                capture_frame_latency;

  82.     jack_nframes_t                playback_frame_latency;

  83. 

  84.     unsigned long                *silent;

  85.     char                         *alsa_name_playback;

  86.     char                         *alsa_name_capture;

  87.     char                         *alsa_driver;

  88.     bitset_t			  channels_not_done;

  89.     bitset_t			  channels_done;

  90.     snd_pcm_format_t              playback_sample_format;

  91.     snd_pcm_format_t              capture_sample_format;

  92.     float                         max_sample_val;

  93.     unsigned long                 user_nperiods;

  94.     unsigned int                  playback_nperiods;

  95.     unsigned int                  capture_nperiods;

  96.     unsigned long                 last_mask;

  97.     snd_ctl_t                    *ctl_handle;

  98.     snd_pcm_t                    *playback_handle;

  99.     snd_pcm_t                    *capture_handle;

  100.     snd_pcm_hw_params_t          *playback_hw_params;

  101.     snd_pcm_sw_params_t          *playback_sw_params;

  102.     snd_pcm_hw_params_t          *capture_hw_params;

  103.     snd_pcm_sw_params_t          *capture_sw_params;

  104.     jack_hardware_t              *hw;  

  105.     ClockSyncStatus              *clock_sync_data;

  106.     jack_client_t                *client;

  107.     JSList                       *capture_ports;

  108.     JSList                       *playback_ports;

  109.     JSList                       *monitor_ports;

  110. 

  111.     unsigned long input_monitor_mask;

  112. 

  113.     char soft_mode;

  114.     char hw_monitoring;

  115.     char hw_metering;

  116.     char all_monitor_in;

  117.     char capture_and_playback_not_synced;

  118.     char playback_interleaved;

  119.     char capture_interleaved;

  120.     char with_monitor_ports;

  121.     char has_clock_sync_reporting;

  122.     char has_hw_monitoring;

  123.     char has_hw_metering;

  124.     char quirk_bswap;

  125. 

  126.     ReadCopyFunction read_via_copy;

  127.     WriteCopyFunction write_via_copy;

  128.     CopyCopyFunction channel_copy;

  129. 

  130.     int             dither;

  131.     dither_state_t *dither_state;

  132. 

  133.     SampleClockMode clock_mode;

  134.     JSList *clock_sync_listeners;

  135.     pthread_mutex_t clock_sync_lock;

  136.     unsigned long next_clock_sync_listener_id;

  137. 

  138.     int running;

  139.     int run;

  140. 

  141.     int poll_late;

  142.     int xrun_count;

  143.     int process_count;

  144. 

  145.     alsa_midi_t *midi;

  146.     int xrun_recovery;

  147. 

  148. } alsa_driver_t;

  149. 

  150. static inline void 

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

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

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

  154. }

  155. 

  156. static inline void 

  157. alsa_driver_silence_on_channel (alsa_driver_t *driver, channel_t chn,

  158. 				jack_nframes_t nframes) {

  159. 	if (driver->playback_interleaved) {

  160. 		memset_interleave 

  161. 			(driver->playback_addr[chn],

  162. 			 0, nframes * driver->playback_sample_bytes,

  163. 			 driver->interleave_unit,

  164. 			 driver->playback_interleave_skip[chn]);

  165. 	} else {

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

  167. 			nframes * driver->playback_sample_bytes);

  168. 	}

  169. 	alsa_driver_mark_channel_done (driver,chn);

  170. }

  171. 

  172. static inline void 

  173. alsa_driver_silence_on_channel_no_mark (alsa_driver_t *driver, channel_t chn,

  174. 					jack_nframes_t nframes) {

  175. 	if (driver->playback_interleaved) {

  176. 		memset_interleave 

  177. 			(driver->playback_addr[chn],

  178. 			 0, nframes * driver->playback_sample_bytes,

  179. 			 driver->interleave_unit,

  180. 			 driver->playback_interleave_skip[chn]);

  181. 	} else {

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

  183. 			nframes * driver->playback_sample_bytes);

  184. 	}

  185. }

  186. 

  187. static inline void 

  188. alsa_driver_read_from_channel (alsa_driver_t *driver,

  189. 			       channel_t channel,

  190. 			       jack_default_audio_sample_t *buf,

  191. 			       jack_nframes_t nsamples)

  192. {

  193. 	driver->read_via_copy (buf, 

  194. 			       driver->capture_addr[channel],

  195. 			       nsamples, 

  196. 			       driver->capture_interleave_skip[channel]);

  197. }

  198. 

  199. static inline void 

  200. alsa_driver_write_to_channel (alsa_driver_t *driver,

  201. 			      channel_t channel, 

  202. 			      jack_default_audio_sample_t *buf, 

  203. 			      jack_nframes_t nsamples)

  204. {

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

  206. 				buf, 

  207. 				nsamples, 

  208. 				driver->playback_interleave_skip[channel],

  209. 				driver->dither_state+channel);

  210. 	alsa_driver_mark_channel_done (driver, channel);

  211. }

  212. 

  213. static inline void 

  214. alsa_driver_copy_channel (alsa_driver_t *driver, 

  215. 			  channel_t input_channel, 

  216. 			  channel_t output_channel,

  217. 			  jack_nframes_t nsamples) {

  218. 

  219. 	driver->channel_copy (driver->playback_addr[output_channel],

  220. 			      driver->capture_addr[input_channel],

  221. 			      nsamples * driver->playback_sample_bytes,

  222. 			      driver->playback_interleave_skip[output_channel],

  223. 			      driver->capture_interleave_skip[input_channel]);

  224. 	alsa_driver_mark_channel_done (driver, output_channel);

  225. }

  226. 

  227. void  alsa_driver_silence_untouched_channels (alsa_driver_t *driver,

  228. 					      jack_nframes_t nframes);

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

  230. 					 ClockSyncStatus status);

  231. int   alsa_driver_listen_for_clock_sync_status (alsa_driver_t *,

  232. 						ClockSyncListenerFunction,

  233. 						void *arg);

  234. int   alsa_driver_stop_listen_for_clock_sync_status (alsa_driver_t *,

  235. 						     unsigned int);

  236. void  alsa_driver_clock_sync_notify (alsa_driver_t *, channel_t chn,

  237. 				     ClockSyncStatus);

  238. 

  239. #endif /* __jack_alsa_driver_h__ */