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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_START_CLOSED      (1 << 0)

  73. #define ALSA_DRIVER_FEAT_CLOSE_IDLE_DEVS   (1 << 1)

  74. #define ALSA_DRIVER_FEAT_UNLINKED_DEVS     (1 << 2)

  75. 

  76. #ifdef __cplusplus

  77. extern "C"

  78. {

  79. #endif

  80. 

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

  82.                                    unsigned long src_bytes,

  83.                                    unsigned long src_skip_bytes);

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

  85.                                    unsigned long src_bytes,

  86.                                    unsigned long dst_skip_bytes,

  87.                                    dither_state_t *state);

  88. 

  89. typedef struct _alsa_device {

  90. #ifdef __QNXNTO__

  91.     unsigned int                  playback_sample_format;

  92.     unsigned int                  capture_sample_format;

  93.     void                          *capture_areas;

  94.     void                          *playback_areas;

  95.     void                          *capture_areas_ptr;

  96.     void                          *playback_areas_ptr;

  97. #else

  98.     snd_pcm_format_t              playback_sample_format;

  99.     snd_pcm_format_t              capture_sample_format;

  100.     const snd_pcm_channel_area_t *capture_areas;

  101.     const snd_pcm_channel_area_t *playback_areas;

  102. #endif

  103.     snd_pcm_t *playback_handle;

  104.     snd_pcm_t *capture_handle;

  105. 

  106.     char *playback_name;

  107.     char *capture_name;

  108. 

  109.     char **playback_addr;

  110.     char **capture_addr;

  111. 

  112.     channel_t playback_channel_offset;

  113.     channel_t capture_channel_offset;

  114. 

  115.     channel_t playback_nchannels;

  116.     channel_t capture_nchannels;

  117.     channel_t max_nchannels;

  118.     channel_t user_nchannels;

  119. 

  120.     bitset_t channels_not_done;

  121.     bitset_t channels_done;

  122. 

  123.     char quirk_bswap;

  124. 

  125.     ReadCopyFunction read_via_copy;

  126.     WriteCopyFunction write_via_copy;

  127. 

  128.     unsigned long interleave_unit;

  129.     unsigned long *capture_interleave_skip;

  130.     unsigned long *playback_interleave_skip;

  131. 

  132.     char playback_interleaved;

  133.     char capture_interleaved;

  134. 

  135.     unsigned long *silent;

  136. 

  137.     unsigned long playback_sample_bytes;

  138.     unsigned long capture_sample_bytes;

  139. 

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

  141.     int capture_linked;

  142.     int playback_linked;

  143. 

  144.     int capture_xrun_count;

  145.     int playback_xrun_count;

  146. 

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

  148.     int capture_target_state;

  149.     int playback_target_state;

  150. 

  151.     jack_hardware_t *hw;

  152.     char *alsa_driver;

  153. } alsa_device_t;

  154. 

  155. typedef struct _alsa_driver {

  156. 

  157.     JACK_DRIVER_NT_DECL

  158. 

  159. #ifndef __QNXNTO__

  160.     snd_pcm_hw_params_t          *playback_hw_params;

  161.     snd_pcm_sw_params_t          *playback_sw_params;

  162.     snd_pcm_hw_params_t          *capture_hw_params;

  163.     snd_pcm_sw_params_t          *capture_sw_params;

  164. #endif

  165.     int                           poll_timeout_ms;

  166.     jack_time_t                   poll_last;

  167.     jack_time_t                   poll_next;

  168.     struct pollfd                *pfd;

  169.     unsigned int                  playback_nfds;

  170.     unsigned int                  capture_nfds;

  171.     channel_t                     playback_nchannels;

  172.     channel_t                     capture_nchannels;

  173. 

  174.     jack_nframes_t                frame_rate;

  175.     jack_nframes_t                frames_per_cycle;

  176.     jack_nframes_t                capture_frame_latency;

  177.     jack_nframes_t                playback_frame_latency;

  178. 

  179.     unsigned long                 user_nperiods;

  180.     unsigned int                  playback_nperiods;

  181.     unsigned int                  capture_nperiods;

  182.     snd_ctl_t                    *ctl_handle;

  183.     jack_client_t                *client;

  184. 

  185.     unsigned long input_monitor_mask;

  186. 

  187.     char soft_mode;

  188.     char hw_monitoring;

  189.     char hw_metering;

  190.     char all_monitor_in;

  191.     char with_monitor_ports;

  192.     char has_clock_sync_reporting;

  193.     char has_hw_monitoring;

  194.     char has_hw_metering;

  195. 

  196.     int             dither;

  197.     dither_state_t *dither_state;

  198. 

  199.     SampleClockMode clock_mode;

  200.     JSList *clock_sync_listeners;

  201.     pthread_mutex_t clock_sync_lock;

  202. 

  203.     int poll_late;

  204.     int xrun_count;

  205.     int process_count;

  206. 

  207.     alsa_midi_t *midi;

  208.     int xrun_recovery;

  209. 

  210.     alsa_device_t *devices;

  211.     int devices_count;

  212.     int devices_c_count;

  213.     int devices_p_count;

  214. 

  215.     int features;

  216. } alsa_driver_t;

  217. 

  218. typedef struct _alsa_device_info {

  219.     char *capture_name;

  220.     char *playback_name;

  221. 

  222.     int capture_channels;

  223.     int playback_channels;

  224. } alsa_device_info_t;

  225. 

  226. typedef struct _alsa_driver_info {

  227.     alsa_device_info_t *devices;

  228.     uint32_t devices_capture_size;

  229.     uint32_t devices_playback_size;

  230. 

  231.     char *midi_name;

  232.     alsa_midi_t *midi_driver;

  233. 

  234.     jack_nframes_t frame_rate;

  235.     jack_nframes_t frames_per_period;

  236.     int periods_n;

  237. 

  238.     DitherAlgorithm dither;

  239. 

  240.     int shorts_first;

  241. 

  242.     jack_nframes_t capture_latency;

  243.     jack_nframes_t playback_latency;

  244. 

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

  246.     int hw_monitoring;

  247.     int hw_metering;

  248.     int monitor;

  249.     int soft_mode;

  250. 

  251.     int features;

  252. } alsa_driver_info_t;

  253. 

  254. static inline void

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

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

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

  258. }

  259. 

  260. static inline void

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

  262. 				jack_nframes_t nframes) {

  263. 	if (device->playback_interleaved) {

  264. 		memset_interleave

  265. 			(device->playback_addr[chn],

  266. 			 0, nframes * device->playback_sample_bytes,

  267. 			 device->interleave_unit,

  268. 			 device->playback_interleave_skip[chn]);

  269. 	} else {

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

  271. 			nframes * device->playback_sample_bytes);

  272. 	}

  273.     alsa_driver_mark_channel_done (driver, device, chn);

  274. }

  275. 

  276. static inline void

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

  278. 					jack_nframes_t nframes) {

  279. 	if (device->playback_interleaved) {

  280. 		memset_interleave

  281. 			(device->playback_addr[chn],

  282. 			 0, nframes * device->playback_sample_bytes,

  283. 			 device->interleave_unit,

  284. 			 device->playback_interleave_skip[chn]);

  285. 	} else {

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

  287. 			nframes * device->playback_sample_bytes);

  288. 	}

  289. }

  290. 

  291. static inline void

  292. alsa_driver_read_from_channel (alsa_driver_t *driver,

  293.                    alsa_device_t *device,

  294. 			       channel_t channel,

  295. 			       jack_default_audio_sample_t *buf,

  296. 			       jack_nframes_t nsamples)

  297. {

  298. 	device->read_via_copy (buf,

  299. 			       device->capture_addr[channel],

  300. 			       nsamples,

  301. 			       device->capture_interleave_skip[channel]);

  302. }

  303. 

  304. static inline void

  305. alsa_driver_write_to_channel (alsa_driver_t *driver,

  306.                   alsa_device_t *device,

  307. 			      channel_t channel,

  308. 			      jack_default_audio_sample_t *buf,

  309. 			      jack_nframes_t nsamples)

  310. {

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

  312. 				buf,

  313. 				nsamples,

  314. 				device->playback_interleave_skip[channel],

  315. 				driver->dither_state+channel);

  316. 	alsa_driver_mark_channel_done (driver, device, channel);

  317. }

  318. 

  319. int

  320. alsa_driver_reset_parameters (alsa_driver_t *driver,

  321. 			      jack_nframes_t frames_per_cycle,

  322. 			      jack_nframes_t user_nperiods,

  323. 			      jack_nframes_t rate);

  324. 

  325. jack_driver_t *

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

  327. 

  328. void

  329. alsa_driver_delete (alsa_driver_t *driver);

  330. 

  331. int

  332. alsa_driver_open (alsa_driver_t *driver);

  333. 

  334. int

  335. alsa_driver_start (alsa_driver_t *driver);

  336. 

  337. int

  338. alsa_driver_stop (alsa_driver_t *driver);

  339. 

  340. int

  341. alsa_driver_close (alsa_driver_t *driver);

  342. 

  343. jack_nframes_t

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

  345. 		  *delayed_usecs);

  346. 

  347. int

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

  349. 

  350. int

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

  352. 

  353. // Code implemented in JackAlsaDriver.cpp

  354. 

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

  356. void MonitorInput();

  357. void ClearOutput();

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

  359. void SetTime(jack_time_t time);

  360. 

  361. int Restart();

  362. 

  363. #ifdef __cplusplus

  364. }

  365. #endif

  366. 

  367. 

  368. #endif /* __jack_alsa_driver_h__ */