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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.     $Id$

  19. */

  20. 

  21. #ifndef __jack_alsa_driver_h__

  22. #define __jack_alsa_driver_h__

  23. 

  24. #define ALSA_PCM_OLD_HW_PARAMS_API

  25. #define ALSA_PCM_OLD_SW_PARAMS_API

  26. #include <alsa/asoundlib.h>

  27. 

  28. #if __BYTE_ORDER == __LITTLE_ENDIAN

  29. 	#define	SND_PCM_FORMAT_S24_3 SND_PCM_FORMAT_S24_3LE

  30. #elif __BYTE_ORDER == __BIG_ENDIAN

  31. 	#define	SND_PCM_FORMAT_S24_3 SND_PCM_FORMAT_S24_3BE

  32. #endif

  33. 

  34. 

  35. 

  36. #include <jack/types.h>

  37. #include <jack/hardware.h>

  38. #include <jack/driver.h>

  39. #include <jack/memops.h>

  40. #include <jack/jack.h>

  41. 

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

  43. 				   unsigned long src_bytes,

  44. 				   unsigned long src_skip_bytes);

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

  46. 				   unsigned long src_bytes,

  47. 				   unsigned long dst_skip_bytes,

  48. 				   dither_state_t *state);

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

  50. 				   unsigned long src_bytes,

  51. 				   unsigned long dst_skip_bytes,

  52. 				   unsigned long src_skip_byte);

  53. 

  54. typedef struct {

  55. 

  56.     JACK_DRIVER_NT_DECL

  57. 

  58.     int                           poll_timeout;

  59.     jack_time_t                   poll_last;

  60.     jack_time_t                   poll_next;

  61.     char                        **playback_addr;

  62.     char                        **capture_addr;

  63.     const snd_pcm_channel_area_t *capture_areas;

  64.     const snd_pcm_channel_area_t *playback_areas;

  65.     struct pollfd                *pfd;

  66.     unsigned int                  playback_nfds;

  67.     unsigned int                  capture_nfds;

  68.     unsigned long                 interleave_unit;

  69.     unsigned long                 capture_interleave_skip;

  70.     unsigned long                 playback_interleave_skip;

  71.     channel_t                     max_nchannels;

  72.     channel_t                     user_nchannels;

  73.     channel_t                     playback_nchannels;

  74.     channel_t                     capture_nchannels;

  75.     unsigned long                 playback_sample_bytes;

  76.     unsigned long                 capture_sample_bytes;

  77. 

  78.     jack_nframes_t                frame_rate;

  79.     jack_nframes_t                frames_per_cycle;

  80.     jack_nframes_t                capture_frame_latency;

  81.     jack_nframes_t                playback_frame_latency;

  82. 

  83.     unsigned long                *silent;

  84.     char                         *alsa_name_playback;

  85.     char                         *alsa_name_capture;

  86.     char                         *alsa_driver;

  87.     unsigned long                 channels_not_done;

  88.     unsigned long                 channel_done_bits;

  89.     snd_pcm_format_t              playback_sample_format;

  90.     snd_pcm_format_t              capture_sample_format;

  91.     float                         max_sample_val;

  92.     unsigned long                 user_nperiods;

  93.     unsigned int                  playback_nperiods;

  94.     unsigned int                  capture_nperiods;

  95.     unsigned long                 last_mask;

  96.     snd_ctl_t                    *ctl_handle;

  97.     snd_pcm_t                    *playback_handle;

  98.     snd_pcm_t                    *capture_handle;

  99.     snd_pcm_hw_params_t          *playback_hw_params;

  100.     snd_pcm_sw_params_t          *playback_sw_params;

  101.     snd_pcm_hw_params_t          *capture_hw_params;

  102.     snd_pcm_sw_params_t          *capture_sw_params;

  103.     jack_hardware_t              *hw;  

  104.     ClockSyncStatus              *clock_sync_data;

  105.     jack_client_t                *client;

  106.     JSList                       *capture_ports;

  107.     JSList                       *playback_ports;

  108. 

  109.     unsigned long input_monitor_mask;

  110. 

  111.     char   soft_mode : 1;

  112.     char   hw_monitoring : 1;

  113.     char   hw_metering : 1;

  114.     char   all_monitor_in : 1;

  115.     char   capture_and_playback_not_synced : 1;

  116.     char   playback_interleaved : 1;

  117.     char   capture_interleaved : 1;

  118.     char   with_monitor_ports : 1;

  119. 

  120.     ReadCopyFunction read_via_copy;

  121.     WriteCopyFunction write_via_copy;

  122.     CopyCopyFunction channel_copy;

  123. 

  124.     int             dither;

  125.     dither_state_t *dither_state;

  126. 

  127.     SampleClockMode clock_mode;

  128.     JSList *clock_sync_listeners;

  129.     pthread_mutex_t clock_sync_lock;

  130.     unsigned long next_clock_sync_listener_id;

  131.     char has_clock_sync_reporting : 1;

  132.     char has_hw_monitoring : 1;

  133.     char has_hw_metering : 1;

  134. 

  135.     int running;

  136.     int run;

  137. 

  138.     int xrun_count;

  139.     int process_count;

  140. 

  141. } alsa_driver_t;

  142. 

  143. static __inline__ void alsa_driver_mark_channel_done (alsa_driver_t *driver, channel_t chn) {

  144. 	driver->channels_not_done &= ~(1<<chn);

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

  146. }

  147. 

  148. static __inline__ void alsa_driver_silence_on_channel (alsa_driver_t *driver, channel_t chn, jack_nframes_t nframes) {

  149. 	if (driver->playback_interleaved) {

  150. 		memset_interleave 

  151. 			(driver->playback_addr[chn],

  152. 			 0, nframes * driver->playback_sample_bytes,

  153. 			 driver->interleave_unit,

  154. 			 driver->playback_interleave_skip);

  155. 	} else {

  156. 		memset (driver->playback_addr[chn], 0, nframes * driver->playback_sample_bytes);

  157. 	}

  158. 	alsa_driver_mark_channel_done (driver,chn);

  159. }

  160. 

  161. static __inline__ void alsa_driver_silence_on_channel_no_mark (alsa_driver_t *driver, channel_t chn, jack_nframes_t nframes) {

  162. 	if (driver->playback_interleaved) {

  163. 		memset_interleave 

  164. 			(driver->playback_addr[chn],

  165. 			 0, nframes * driver->playback_sample_bytes,

  166. 			 driver->interleave_unit,

  167. 			 driver->playback_interleave_skip);

  168. 	} else {

  169. 		memset (driver->playback_addr[chn], 0, nframes * driver->playback_sample_bytes);

  170. 	}

  171. }

  172. 

  173. static __inline__ void alsa_driver_read_from_channel (alsa_driver_t *driver, 

  174. 					   channel_t channel, jack_default_audio_sample_t *buf, 

  175. 					   jack_nframes_t nsamples)

  176. {

  177. 	driver->read_via_copy (buf, 

  178. 			       driver->capture_addr[channel],

  179. 			       nsamples, 

  180. 			       driver->capture_interleave_skip);

  181. }

  182. 

  183. static __inline__ void alsa_driver_write_to_channel (alsa_driver_t *driver,

  184. 				   channel_t channel, 

  185. 				   jack_default_audio_sample_t *buf, 

  186. 				   jack_nframes_t nsamples)

  187. {

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

  189. 				buf, 

  190. 				nsamples, 

  191. 				driver->playback_interleave_skip,

  192. 				driver->dither_state+channel);

  193. 	alsa_driver_mark_channel_done (driver, channel);

  194. }

  195. 

  196. static __inline__ void alsa_driver_copy_channel (alsa_driver_t *driver, 

  197. 			       channel_t input_channel, 

  198. 			       channel_t output_channel,

  199. 			       jack_nframes_t nsamples) {

  200. 

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

  202. 			      driver->capture_addr[input_channel],

  203. 			      nsamples * driver->playback_sample_bytes,

  204. 			      driver->playback_interleave_skip,

  205. 			      driver->capture_interleave_skip);

  206. 	alsa_driver_mark_channel_done (driver, output_channel);

  207. }

  208. 

  209. void  alsa_driver_set_clock_sync_status (alsa_driver_t *driver, channel_t chn, ClockSyncStatus status);

  210. int   alsa_driver_listen_for_clock_sync_status (alsa_driver_t *, ClockSyncListenerFunction, void *arg);

  211. int   alsa_driver_stop_listen_for_clock_sync_status (alsa_driver_t *, unsigned int);

  212. void  alsa_driver_clock_sync_notify (alsa_driver_t *, channel_t chn, ClockSyncStatus);

  213. 

  214. 

  215. #endif /* __jack_alsa_driver_h__ */