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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. #ifdef __cplusplus

  45. extern "C"

  46. {

  47. #endif

  48. 

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

  50.                                    unsigned long src_bytes,

  51.                                    unsigned long src_skip_bytes);

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

  53.                                    unsigned long src_bytes,

  54.                                    unsigned long dst_skip_bytes,

  55.                                    dither_state_t *state);

  56. 

  57. typedef struct _alsa_driver {

  58. 

  59.     JACK_DRIVER_NT_DECL

  60. 

  61.     int                           poll_timeout;

  62.     jack_time_t                   poll_last;

  63.     jack_time_t                   poll_next;

  64.     char                        **playback_addr;

  65.     char                        **capture_addr;

  66.     const snd_pcm_channel_area_t *capture_areas;

  67.     const snd_pcm_channel_area_t *playback_areas;

  68.     struct pollfd                *pfd;

  69.     unsigned int                  playback_nfds;

  70.     unsigned int                  capture_nfds;

  71.     unsigned long                 interleave_unit;

  72.     unsigned long                *capture_interleave_skip;

  73.     unsigned long                *playback_interleave_skip;

  74.     channel_t                     max_nchannels;

  75.     channel_t                     user_nchannels;

  76.     channel_t                     playback_nchannels;

  77.     channel_t                     capture_nchannels;

  78.     unsigned long                 playback_sample_bytes;

  79.     unsigned long                 capture_sample_bytes;

  80. 

  81.     jack_nframes_t                frame_rate;

  82.     jack_nframes_t                frames_per_cycle;

  83.     jack_nframes_t                capture_frame_latency;

  84.     jack_nframes_t                playback_frame_latency;

  85. 

  86.     unsigned long                *silent;

  87.     char                         *alsa_name_playback;

  88.     char                         *alsa_name_capture;

  89.     char                         *alsa_driver;

  90.     bitset_t			  channels_not_done;

  91.     bitset_t			  channels_done;

  92.     snd_pcm_format_t              playback_sample_format;

  93.     snd_pcm_format_t              capture_sample_format;

  94.     float                         max_sample_val;

  95.     unsigned long                 user_nperiods;

  96.     unsigned int                  playback_nperiods;

  97.     unsigned int                  capture_nperiods;

  98.     unsigned long                 last_mask;

  99.     snd_ctl_t                    *ctl_handle;

  100.     snd_pcm_t                    *playback_handle;

  101.     snd_pcm_t                    *capture_handle;

  102.     snd_pcm_hw_params_t          *playback_hw_params;

  103.     snd_pcm_sw_params_t          *playback_sw_params;

  104.     snd_pcm_hw_params_t          *capture_hw_params;

  105.     snd_pcm_sw_params_t          *capture_sw_params;

  106.     jack_hardware_t              *hw;

  107.     ClockSyncStatus              *clock_sync_data;

  108.     jack_client_t                *client;

  109.     JSList                       *capture_ports;

  110.     JSList                       *playback_ports;

  111.     JSList                       *monitor_ports;

  112. 

  113.     unsigned long input_monitor_mask;

  114. 

  115.     char soft_mode;

  116.     char hw_monitoring;

  117.     char hw_metering;

  118.     char all_monitor_in;

  119.     char capture_and_playback_not_synced;

  120.     char playback_interleaved;

  121.     char capture_interleaved;

  122.     char with_monitor_ports;

  123.     char has_clock_sync_reporting;

  124.     char has_hw_monitoring;

  125.     char has_hw_metering;

  126.     char quirk_bswap;

  127. 

  128.     ReadCopyFunction read_via_copy;

  129.     WriteCopyFunction write_via_copy;

  130. 

  131.     int             dither;

  132.     dither_state_t *dither_state;

  133. 

  134.     SampleClockMode clock_mode;

  135.     JSList *clock_sync_listeners;

  136.     pthread_mutex_t clock_sync_lock;

  137.     unsigned long next_clock_sync_listener_id;

  138. 

  139.     int running;

  140.     int run;

  141. 

  142.     int poll_late;

  143.     int xrun_count;

  144.     int process_count;

  145. 

  146.     alsa_midi_t *midi;

  147.     int xrun_recovery;

  148. 

  149. } alsa_driver_t;

  150. 

  151. static inline void

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

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

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

  155. }

  156. 

  157. static inline void

  158. alsa_driver_silence_on_channel (alsa_driver_t *driver, channel_t chn,

  159. 				jack_nframes_t nframes) {

  160. 	if (driver->playback_interleaved) {

  161. 		memset_interleave

  162. 			(driver->playback_addr[chn],

  163. 			 0, nframes * driver->playback_sample_bytes,

  164. 			 driver->interleave_unit,

  165. 			 driver->playback_interleave_skip[chn]);

  166. 	} else {

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

  168. 			nframes * driver->playback_sample_bytes);

  169. 	}

  170. 	alsa_driver_mark_channel_done (driver,chn);

  171. }

  172. 

  173. static inline void

  174. alsa_driver_silence_on_channel_no_mark (alsa_driver_t *driver, channel_t chn,

  175. 					jack_nframes_t nframes) {

  176. 	if (driver->playback_interleaved) {

  177. 		memset_interleave

  178. 			(driver->playback_addr[chn],

  179. 			 0, nframes * driver->playback_sample_bytes,

  180. 			 driver->interleave_unit,

  181. 			 driver->playback_interleave_skip[chn]);

  182. 	} else {

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

  184. 			nframes * driver->playback_sample_bytes);

  185. 	}

  186. }

  187. 

  188. static inline void

  189. alsa_driver_read_from_channel (alsa_driver_t *driver,

  190. 			       channel_t channel,

  191. 			       jack_default_audio_sample_t *buf,

  192. 			       jack_nframes_t nsamples)

  193. {

  194. 	driver->read_via_copy (buf,

  195. 			       driver->capture_addr[channel],

  196. 			       nsamples,

  197. 			       driver->capture_interleave_skip[channel]);

  198. }

  199. 

  200. static inline void

  201. alsa_driver_write_to_channel (alsa_driver_t *driver,

  202. 			      channel_t channel,

  203. 			      jack_default_audio_sample_t *buf,

  204. 			      jack_nframes_t nsamples)

  205. {

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

  207. 				buf,

  208. 				nsamples,

  209. 				driver->playback_interleave_skip[channel],

  210. 				driver->dither_state+channel);

  211. 	alsa_driver_mark_channel_done (driver, channel);

  212. }

  213. 

  214. void  alsa_driver_silence_untouched_channels (alsa_driver_t *driver,

  215. 					      jack_nframes_t nframes);

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

  217. 					 ClockSyncStatus status);

  218. int   alsa_driver_listen_for_clock_sync_status (alsa_driver_t *,

  219. 						ClockSyncListenerFunction,

  220. 						void *arg);

  221. int   alsa_driver_stop_listen_for_clock_sync_status (alsa_driver_t *,

  222. 						     unsigned int);

  223. void  alsa_driver_clock_sync_notify (alsa_driver_t *, channel_t chn,

  224. 				     ClockSyncStatus);

  225. 

  226. int

  227. alsa_driver_reset_parameters (alsa_driver_t *driver,

  228. 			      jack_nframes_t frames_per_cycle,

  229. 			      jack_nframes_t user_nperiods,

  230. 			      jack_nframes_t rate);

  231. 

  232. jack_driver_t *

  233. alsa_driver_new (char *name, char *playback_alsa_device,

  234. 		 char *capture_alsa_device,

  235. 		 jack_client_t *client,

  236. 		 jack_nframes_t frames_per_cycle,

  237. 		 jack_nframes_t user_nperiods,

  238. 		 jack_nframes_t rate,

  239. 		 int hw_monitoring,

  240. 		 int hw_metering,

  241. 		 int capturing,

  242. 		 int playing,

  243. 		 DitherAlgorithm dither,

  244. 		 int soft_mode,

  245. 		 int monitor,

  246. 		 int user_capture_nchnls,

  247. 		 int user_playback_nchnls,

  248. 		 int shorts_first,

  249. 		 jack_nframes_t capture_latency,

  250. 		 jack_nframes_t playback_latency,

  251. 		 alsa_midi_t *midi_driver

  252. 		 );

  253. void

  254. alsa_driver_delete (alsa_driver_t *driver);

  255. 

  256. int

  257. alsa_driver_start (alsa_driver_t *driver);

  258. 

  259. int

  260. alsa_driver_stop (alsa_driver_t *driver);

  261. 

  262. jack_nframes_t

  263. alsa_driver_wait (alsa_driver_t *driver, int extra_fd, int *status, float

  264. 		  *delayed_usecs);

  265. 

  266. int

  267. alsa_driver_read (alsa_driver_t *driver, jack_nframes_t nframes);

  268. 

  269. int

  270. alsa_driver_write (alsa_driver_t* driver, jack_nframes_t nframes);

  271. 

  272. jack_time_t jack_get_microseconds(void);

  273. 

  274. // Code implemented in JackAlsaDriver.cpp

  275. 

  276. void ReadInput(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nread);

  277. void MonitorInput();

  278. void ClearOutput();

  279. void WriteOutput(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nwritten);

  280. void SetTime(jack_time_t time);

  281. int Restart();

  282. 

  283. #ifdef __cplusplus

  284. }

  285. #endif

  286. 

  287. 

  288. #endif /* __jack_alsa_driver_h__ */