21 #ifndef __jack_alsa_driver_h__
22 #define __jack_alsa_driver_h__
24 #include <alsa/asoundlib.h>
27 #if __BYTE_ORDER == __LITTLE_ENDIAN
30 #elif __BYTE_ORDER == __BIG_ENDIAN
42 #include "alsa_midi.h"
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,
62 jack_time_t poll_last;
63 jack_time_t poll_next;
66 const snd_pcm_channel_area_t *capture_areas;
67 const snd_pcm_channel_area_t *playback_areas;
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;
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;
86 unsigned long *silent;
87 char *alsa_name_playback;
88 char *alsa_name_capture;
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;
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;
107 ClockSyncStatus *clock_sync_data;
108 jack_client_t *client;
113 unsigned long input_monitor_mask;
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;
128 ReadCopyFunction read_via_copy;
129 WriteCopyFunction write_via_copy;
134 SampleClockMode clock_mode;
135 JSList *clock_sync_listeners;
136 pthread_mutex_t clock_sync_lock;
137 unsigned long next_clock_sync_listener_id;
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;
158 alsa_driver_silence_on_channel (
alsa_driver_t *driver, channel_t chn,
159 jack_nframes_t nframes) {
160 if (driver->playback_interleaved) {
162 (driver->playback_addr[chn],
163 0, nframes * driver->playback_sample_bytes,
164 driver->interleave_unit,
165 driver->playback_interleave_skip[chn]);
167 memset (driver->playback_addr[chn], 0,
168 nframes * driver->playback_sample_bytes);
170 alsa_driver_mark_channel_done (driver,chn);
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) {
178 (driver->playback_addr[chn],
179 0, nframes * driver->playback_sample_bytes,
180 driver->interleave_unit,
181 driver->playback_interleave_skip[chn]);
183 memset (driver->playback_addr[chn], 0,
184 nframes * driver->playback_sample_bytes);
191 jack_default_audio_sample_t *buf,
192 jack_nframes_t nsamples)
194 driver->read_via_copy (buf,
195 driver->capture_addr[channel],
197 driver->capture_interleave_skip[channel]);
203 jack_default_audio_sample_t *buf,
204 jack_nframes_t nsamples)
206 driver->write_via_copy (driver->playback_addr[channel],
209 driver->playback_interleave_skip[channel],
210 driver->dither_state+channel);
211 alsa_driver_mark_channel_done (driver, channel);
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,
221 int alsa_driver_stop_listen_for_clock_sync_status (
alsa_driver_t *,
223 void alsa_driver_clock_sync_notify (
alsa_driver_t *, channel_t chn,
228 jack_nframes_t frames_per_cycle,
229 jack_nframes_t user_nperiods,
230 jack_nframes_t rate);
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,
243 DitherAlgorithm dither,
246 int user_capture_nchnls,
247 int user_playback_nchnls,
249 jack_nframes_t capture_latency,
250 jack_nframes_t playback_latency,
263 alsa_driver_wait (
alsa_driver_t *driver,
int extra_fd,
int *status,
float
267 alsa_driver_read (
alsa_driver_t *driver, jack_nframes_t nframes);
270 alsa_driver_write (
alsa_driver_t* driver, jack_nframes_t nframes);
272 jack_time_t jack_get_microseconds(
void);
276 void ReadInput(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nread);
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);