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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.     snd_ctl_t *ctl_handle;

  153.     char *alsa_driver;

  154. 

  155.     JSList *clock_sync_listeners;

  156.     pthread_mutex_t clock_sync_lock;

  157.     unsigned long next_clock_sync_listener_id;

  158. } alsa_device_t;

  159. 

  160. typedef struct _alsa_driver {

  161. 

  162.     JACK_DRIVER_NT_DECL

  163. 

  164. #ifndef __QNXNTO__

  165.     snd_pcm_hw_params_t          *playback_hw_params;

  166.     snd_pcm_sw_params_t          *playback_sw_params;

  167.     snd_pcm_hw_params_t          *capture_hw_params;

  168.     snd_pcm_sw_params_t          *capture_sw_params;

  169. #endif

  170.     int                           poll_timeout_ms;

  171.     jack_time_t                   poll_last;

  172.     jack_time_t                   poll_next;

  173.     struct pollfd                *pfd;

  174.     unsigned int                  playback_nfds;

  175.     unsigned int                  capture_nfds;

  176.     channel_t                     playback_nchannels;

  177.     channel_t                     capture_nchannels;

  178. 

  179.     jack_nframes_t                frame_rate;

  180.     jack_nframes_t                frames_per_cycle;

  181.     jack_nframes_t                capture_frame_latency;

  182.     jack_nframes_t                playback_frame_latency;

  183. 

  184.     unsigned long                 user_nperiods;

  185.     unsigned int                  playback_nperiods;

  186.     unsigned int                  capture_nperiods;

  187.     jack_client_t                *client;

  188. 

  189.     unsigned long input_monitor_mask;

  190. 

  191.     char soft_mode;

  192.     char hw_monitoring;

  193.     char hw_metering;

  194.     char all_monitor_in;

  195.     char with_monitor_ports;

  196.     char has_clock_sync_reporting;

  197.     char has_hw_monitoring;

  198.     char has_hw_metering;

  199. 

  200.     int             dither;

  201.     dither_state_t *dither_state;

  202. 

  203.     SampleClockMode clock_mode;

  204. 

  205.     int poll_late;

  206.     int xrun_count;

  207.     int process_count;

  208. 

  209.     alsa_midi_t *midi;

  210.     int xrun_recovery;

  211. 

  212.     alsa_device_t *devices;

  213.     int devices_count;

  214.     int devices_c_count;

  215.     int devices_p_count;

  216. 

  217.     int features;

  218. } alsa_driver_t;

  219. 

  220. typedef struct _alsa_device_info {

  221.     char *capture_name;

  222.     char *playback_name;

  223. 

  224.     int capture_channels;

  225.     int playback_channels;

  226. } alsa_device_info_t;

  227. 

  228. typedef struct _alsa_driver_info {

  229.     alsa_device_info_t *devices;

  230.     uint32_t devices_capture_size;

  231.     uint32_t devices_playback_size;

  232. 

  233.     char *midi_name;

  234.     alsa_midi_t *midi_driver;

  235. 

  236.     jack_nframes_t frame_rate;

  237.     jack_nframes_t frames_per_period;

  238.     int periods_n;

  239. 

  240.     DitherAlgorithm dither;

  241. 

  242.     int shorts_first;

  243. 

  244.     jack_nframes_t capture_latency;

  245.     jack_nframes_t playback_latency;

  246. 

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

  248.     int hw_monitoring;

  249.     int hw_metering;

  250.     int monitor;

  251.     int soft_mode;

  252. 

  253.     int features;

  254. } alsa_driver_info_t;

  255. 

  256. static inline void

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

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

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

  260. }

  261. 

  262. static inline void

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

  264. 				jack_nframes_t nframes) {

  265. 	if (device->playback_interleaved) {

  266. 		memset_interleave

  267. 			(device->playback_addr[chn],

  268. 			 0, nframes * device->playback_sample_bytes,

  269. 			 device->interleave_unit,

  270. 			 device->playback_interleave_skip[chn]);

  271. 	} else {

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

  273. 			nframes * device->playback_sample_bytes);

  274. 	}

  275.     alsa_driver_mark_channel_done (driver, device, chn);

  276. }

  277. 

  278. static inline void

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

  280. 					jack_nframes_t nframes) {

  281. 	if (device->playback_interleaved) {

  282. 		memset_interleave

  283. 			(device->playback_addr[chn],

  284. 			 0, nframes * device->playback_sample_bytes,

  285. 			 device->interleave_unit,

  286. 			 device->playback_interleave_skip[chn]);

  287. 	} else {

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

  289. 			nframes * device->playback_sample_bytes);

  290. 	}

  291. }

  292. 

  293. static inline void

  294. alsa_driver_read_from_channel (alsa_driver_t *driver,

  295.                    alsa_device_t *device,

  296. 			       channel_t channel,

  297. 			       jack_default_audio_sample_t *buf,

  298. 			       jack_nframes_t nsamples)

  299. {

  300. 	device->read_via_copy (buf,

  301. 			       device->capture_addr[channel],

  302. 			       nsamples,

  303. 			       device->capture_interleave_skip[channel]);

  304. }

  305. 

  306. static inline void

  307. alsa_driver_write_to_channel (alsa_driver_t *driver,

  308.                   alsa_device_t *device,

  309. 			      channel_t channel,

  310. 			      jack_default_audio_sample_t *buf,

  311. 			      jack_nframes_t nsamples)

  312. {

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

  314. 				buf,

  315. 				nsamples,

  316. 				device->playback_interleave_skip[channel],

  317. 				driver->dither_state+channel);

  318. 	alsa_driver_mark_channel_done (driver, device, channel);

  319. }

  320. 

  321. int

  322. alsa_driver_reset_parameters (alsa_driver_t *driver,

  323. 			      jack_nframes_t frames_per_cycle,

  324. 			      jack_nframes_t user_nperiods,

  325. 			      jack_nframes_t rate);

  326. 

  327. jack_driver_t *

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

  329. 

  330. void

  331. alsa_driver_delete (alsa_driver_t *driver);

  332. 

  333. int

  334. alsa_driver_open (alsa_driver_t *driver);

  335. 

  336. int

  337. alsa_driver_start (alsa_driver_t *driver);

  338. 

  339. int

  340. alsa_driver_stop (alsa_driver_t *driver);

  341. 

  342. int

  343. alsa_driver_close (alsa_driver_t *driver);

  344. 

  345. jack_nframes_t

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

  347. 		  *delayed_usecs);

  348. 

  349. int

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

  351. 

  352. int

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

  354. 

  355. // Code implemented in JackAlsaDriver.cpp

  356. 

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

  358. void MonitorInput();

  359. void ClearOutput();

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

  361. void SetTime(jack_time_t time);

  362. 

  363. int Restart();

  364. 

  365. #ifdef __cplusplus

  366. }

  367. #endif

  368. 

  369. 

  370. #endif /* __jack_alsa_driver_h__ */