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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. #ifdef __QNXNTO__

  25. #include <sys/asoundlib.h>

  26. #else

  27. #include <alsa/asoundlib.h>

  28. #endif

  29. 

  30. #include "bitset.h"

  31. 

  32. #if __BYTE_ORDER == __LITTLE_ENDIAN

  33. #define IS_LE 0

  34. #define IS_BE 1

  35. #elif __BYTE_ORDER == __BIG_ENDIAN

  36. #define IS_LE 1

  37. #define IS_BE 0

  38. #endif

  39. 

  40. #define TRUE 1

  41. #define FALSE 0

  42. 

  43. #include "types.h"

  44. #include "hardware.h"

  45. #include "driver.h"

  46. #include "memops.h"

  47. #include "alsa_midi.h"

  48. 

  49. #ifdef __QNXNTO__

  50. #define SND_PCM_FORMAT_S16_LE      SND_PCM_SFMT_S16_LE

  51. #define SND_PCM_FORMAT_S16_BE      SND_PCM_SFMT_S16_BE

  52. #define SND_PCM_FORMAT_S24_LE      SND_PCM_SFMT_S24_LE

  53. #define SND_PCM_FORMAT_S24_BE      SND_PCM_SFMT_S24_BE

  54. #define SND_PCM_FORMAT_S32_LE      SND_PCM_SFMT_S32_LE

  55. #define SND_PCM_FORMAT_S32_BE      SND_PCM_SFMT_S32_BE

  56. #define SND_PCM_FORMAT_FLOAT_LE    SND_PCM_SFMT_FLOAT_LE

  57. #define SND_PCM_STATE_PREPARED     SND_PCM_STATUS_PREPARED

  58. #define SND_PCM_STATE_SUSPENDED    SND_PCM_STATUS_SUSPENDED

  59. #define SND_PCM_STATE_XRUN         SND_PCM_STATUS_UNDERRUN

  60. #define SND_PCM_STATE_RUNNING      SND_PCM_STATUS_RUNNING

  61. #define SND_PCM_STATE_NOTREADY     SND_PCM_STATUS_NOTREADY

  62. #define SND_PCM_STREAM_PLAYBACK    SND_PCM_CHANNEL_PLAYBACK

  63. #define SND_PCM_STREAM_CAPTURE     SND_PCM_CHANNEL_CAPTURE

  64. 

  65. typedef unsigned long              snd_pcm_uframes_t;

  66. typedef signed long                snd_pcm_sframes_t;

  67. typedef int32_t                    alsa_driver_default_format_t;

  68. #else

  69. #define SND_PCM_STATE_NOTREADY     (SND_PCM_STATE_LAST + 1)

  70. #endif

  71. 

  72. #define ALSA_DRIVER_FEAT_CLOSE_IDLE_DEVS   (1 << 1)

  73. 

  74. #ifdef __cplusplus

  75. extern "C"

  76. {

  77. #endif

  78. 

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

  80.                                    unsigned long src_bytes,

  81.                                    unsigned long src_skip_bytes);

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

  83.                                    unsigned long src_bytes,

  84.                                    unsigned long dst_skip_bytes,

  85.                                    dither_state_t *state);

  86. 

  87. typedef struct _alsa_device {

  88. #ifdef __QNXNTO__

  89.     unsigned int                  playback_sample_format;

  90.     unsigned int                  capture_sample_format;

  91.     void                          *capture_areas;

  92.     void                          *playback_areas;

  93.     void                          *capture_areas_ptr;

  94.     void                          *playback_areas_ptr;

  95. #else

  96.     snd_pcm_format_t              playback_sample_format;

  97.     snd_pcm_format_t              capture_sample_format;

  98.     const snd_pcm_channel_area_t *capture_areas;

  99.     const snd_pcm_channel_area_t *playback_areas;

  100. #endif

  101.     snd_pcm_t *playback_handle;

  102.     snd_pcm_t *capture_handle;

  103. 

  104.     char *playback_name;

  105.     char *capture_name;

  106. 

  107.     char **playback_addr;

  108.     char **capture_addr;

  109. 

  110.     channel_t playback_channel_offset;

  111.     channel_t capture_channel_offset;

  112. 

  113.     channel_t playback_nchannels;

  114.     channel_t capture_nchannels;

  115.     channel_t max_nchannels;

  116.     channel_t user_nchannels;

  117. 

  118.     bitset_t channels_not_done;

  119.     bitset_t channels_done;

  120. 

  121.     char quirk_bswap;

  122. 

  123.     ReadCopyFunction read_via_copy;

  124.     WriteCopyFunction write_via_copy;

  125. 

  126.     unsigned long interleave_unit;

  127.     unsigned long *capture_interleave_skip;

  128.     unsigned long *playback_interleave_skip;

  129. 

  130.     char playback_interleaved;

  131.     char capture_interleaved;

  132. 

  133.     unsigned long *silent;

  134. 

  135.     unsigned long playback_sample_bytes;

  136.     unsigned long capture_sample_bytes;

  137. 

  138.     /* device is 'snd_pcm_link' to a group, only 1 group of linked devices is allowed */

  139.     int capture_linked;

  140.     int playback_linked;

  141. 

  142.     int capture_xrun_count;

  143.     int playback_xrun_count;

  144. 

  145.     /* desired state of device, decided by JackAlsaDriver */

  146.     int capture_target_state;

  147.     int playback_target_state;

  148. 

  149.     jack_hardware_t *hw;

  150.     char *alsa_driver;

  151. } alsa_device_t;

  152. 

  153. typedef struct _alsa_driver {

  154. 

  155.     JACK_DRIVER_NT_DECL

  156. 

  157. #ifndef __QNXNTO__

  158.     snd_pcm_hw_params_t          *playback_hw_params;

  159.     snd_pcm_sw_params_t          *playback_sw_params;

  160.     snd_pcm_hw_params_t          *capture_hw_params;

  161.     snd_pcm_sw_params_t          *capture_sw_params;

  162. #endif

  163.     int                           poll_timeout_ms;

  164.     jack_time_t                   poll_last;

  165.     jack_time_t                   poll_next;

  166.     struct pollfd                *pfd;

  167.     unsigned int                  playback_nfds;

  168.     unsigned int                  capture_nfds;

  169.     channel_t                     playback_nchannels;

  170.     channel_t                     capture_nchannels;

  171. 

  172.     jack_nframes_t                frame_rate;

  173.     jack_nframes_t                frames_per_cycle;

  174.     jack_nframes_t                capture_frame_latency;

  175.     jack_nframes_t                playback_frame_latency;

  176. 

  177.     unsigned long                 user_nperiods;

  178.     unsigned int                  playback_nperiods;

  179.     unsigned int                  capture_nperiods;

  180.     snd_ctl_t                    *ctl_handle;

  181.     jack_client_t                *client;

  182. 

  183.     unsigned long input_monitor_mask;

  184. 

  185.     char soft_mode;

  186.     char hw_monitoring;

  187.     char hw_metering;

  188.     char all_monitor_in;

  189.     char with_monitor_ports;

  190.     char has_clock_sync_reporting;

  191.     char has_hw_monitoring;

  192.     char has_hw_metering;

  193. 

  194.     int             dither;

  195.     dither_state_t *dither_state;

  196. 

  197.     SampleClockMode clock_mode;

  198.     JSList *clock_sync_listeners;

  199.     pthread_mutex_t clock_sync_lock;

  200. 

  201.     int poll_late;

  202.     int xrun_count;

  203.     int process_count;

  204. 

  205.     alsa_midi_t *midi;

  206.     int xrun_recovery;

  207. 

  208.     alsa_device_t *devices;

  209.     int devices_count;

  210.     int devices_c_count;

  211.     int devices_p_count;

  212. 

  213.     int features;

  214. } alsa_driver_t;

  215. 

  216. typedef struct _alsa_device_info {

  217.     char *capture_name;

  218.     char *playback_name;

  219. 

  220.     int capture_channels;

  221.     int playback_channels;

  222. } alsa_device_info_t;

  223. 

  224. typedef struct _alsa_driver_info {

  225.     alsa_device_info_t *devices;

  226.     uint32_t devices_capture_size;

  227.     uint32_t devices_playback_size;

  228. 

  229.     char *midi_name;

  230.     alsa_midi_t *midi_driver;

  231. 

  232.     jack_nframes_t frame_rate;

  233.     jack_nframes_t frames_per_period;

  234.     int periods_n;

  235. 

  236.     DitherAlgorithm dither;

  237. 

  238.     int shorts_first;

  239. 

  240.     jack_nframes_t capture_latency;

  241.     jack_nframes_t playback_latency;

  242. 

  243.     // these 4 should be reworked as struct.features

  244.     int hw_monitoring;

  245.     int hw_metering;

  246.     int monitor;

  247.     int soft_mode;

  248. 

  249.     int features;

  250. } alsa_driver_info_t;

  251. 

  252. static inline void

  253. alsa_driver_mark_channel_done (alsa_driver_t *driver, alsa_device_t *device, channel_t chn) {

  254. 	bitset_remove (device->channels_not_done, chn);

  255. 	device->silent[chn] = 0;

  256. }

  257. 

  258. static inline void

  259. alsa_driver_silence_on_channel (alsa_driver_t *driver, alsa_device_t *device, channel_t chn,

  260. 				jack_nframes_t nframes) {

  261. 	if (device->playback_interleaved) {

  262. 		memset_interleave

  263. 			(device->playback_addr[chn],

  264. 			 0, nframes * device->playback_sample_bytes,

  265. 			 device->interleave_unit,

  266. 			 device->playback_interleave_skip[chn]);

  267. 	} else {

  268. 		memset (device->playback_addr[chn], 0,

  269. 			nframes * device->playback_sample_bytes);

  270. 	}

  271.     alsa_driver_mark_channel_done (driver, device, chn);

  272. }

  273. 

  274. static inline void

  275. alsa_driver_silence_on_channel_no_mark (alsa_driver_t *driver, alsa_device_t *device, channel_t chn,

  276. 					jack_nframes_t nframes) {

  277. 	if (device->playback_interleaved) {

  278. 		memset_interleave

  279. 			(device->playback_addr[chn],

  280. 			 0, nframes * device->playback_sample_bytes,

  281. 			 device->interleave_unit,

  282. 			 device->playback_interleave_skip[chn]);

  283. 	} else {

  284. 		memset (device->playback_addr[chn], 0,

  285. 			nframes * device->playback_sample_bytes);

  286. 	}

  287. }

  288. 

  289. static inline void

  290. alsa_driver_read_from_channel (alsa_driver_t *driver,

  291.                    alsa_device_t *device,

  292. 			       channel_t channel,

  293. 			       jack_default_audio_sample_t *buf,

  294. 			       jack_nframes_t nsamples)

  295. {

  296. 	device->read_via_copy (buf,

  297. 			       device->capture_addr[channel],

  298. 			       nsamples,

  299. 			       device->capture_interleave_skip[channel]);

  300. }

  301. 

  302. static inline void

  303. alsa_driver_write_to_channel (alsa_driver_t *driver,

  304.                   alsa_device_t *device,

  305. 			      channel_t channel,

  306. 			      jack_default_audio_sample_t *buf,

  307. 			      jack_nframes_t nsamples)

  308. {

  309. 	device->write_via_copy (device->playback_addr[channel],

  310. 				buf,

  311. 				nsamples,

  312. 				device->playback_interleave_skip[channel],

  313. 				driver->dither_state+channel);

  314. 	alsa_driver_mark_channel_done (driver, device, channel);

  315. }

  316. 

  317. int

  318. alsa_driver_reset_parameters (alsa_driver_t *driver,

  319. 			      jack_nframes_t frames_per_cycle,

  320. 			      jack_nframes_t user_nperiods,

  321. 			      jack_nframes_t rate);

  322. 

  323. jack_driver_t *

  324. alsa_driver_new (char *name, alsa_driver_info_t info, jack_client_t *client);

  325. 

  326. void

  327. alsa_driver_delete (alsa_driver_t *driver);

  328. 

  329. int

  330. alsa_driver_open (alsa_driver_t *driver);

  331. 

  332. int

  333. alsa_driver_start (alsa_driver_t *driver);

  334. 

  335. int

  336. alsa_driver_stop (alsa_driver_t *driver);

  337. 

  338. int

  339. alsa_driver_close (alsa_driver_t *driver);

  340. 

  341. jack_nframes_t

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

  343. 		  *delayed_usecs);

  344. 

  345. int

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

  347. 

  348. int

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

  350. 

  351. // Code implemented in JackAlsaDriver.cpp

  352. 

  353. void ReadInput(alsa_device_t *device, jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nread);

  354. void MonitorInput();

  355. void ClearOutput();

  356. void WriteOutput(alsa_device_t *device, jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nwritten);

  357. void SetTime(jack_time_t time);

  358. 

  359. int Restart();

  360. 

  361. #ifdef __cplusplus

  362. }

  363. #endif

  364. 

  365. 

  366. #endif /* __jack_alsa_driver_h__ */