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- /*
- Copyright (C) 2001 Paul Davis
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
- */
-
- #ifndef __jack_alsa_driver_h__
- #define __jack_alsa_driver_h__
-
- #include <alsa/asoundlib.h>
-
- #include <jack/types.h>
- #include <jack/hardware.h>
- #include <jack/driver.h>
- #include <jack/memops.h>
- #include <jack/jack.h>
-
- typedef void (*ReadCopyFunction) (sample_t *dst, char *src,
- unsigned long src_bytes,
- unsigned long src_skip_bytes);
- typedef void (*WriteCopyFunction) (char *dst, sample_t *src,
- unsigned long src_bytes,
- unsigned long dst_skip_bytes,
- gain_t gain);
- typedef void (*CopyCopyFunction) (char *dst, char *src,
- unsigned long src_bytes,
- unsigned long dst_skip_bytes,
- unsigned long src_skip_byte);
-
- typedef struct {
-
- JACK_DRIVER_DECL
-
- char **playback_addr;
- char **capture_addr;
- const snd_pcm_channel_area_t *capture_areas;
- const snd_pcm_channel_area_t *playback_areas;
- struct pollfd *pfd;
- unsigned int playback_nfds;
- unsigned int capture_nfds;
- unsigned long interleave_unit;
- unsigned long capture_interleave_skip;
- unsigned long playback_interleave_skip;
- unsigned long max_nchannels;
- unsigned long user_nchannels;
- unsigned long playback_nchannels;
- unsigned long capture_nchannels;
- unsigned long sample_bytes;
-
- nframes_t frame_rate;
- nframes_t frames_per_cycle;
- nframes_t capture_frame_latency;
- nframes_t playback_frame_latency;
-
- unsigned long *silent;
- char *alsa_name;
- char *alsa_driver;
- snd_pcm_uframes_t buffer_frames;
- unsigned long bytes_per_cycle; /* per channel */
- unsigned long channels_not_done;
- unsigned long channel_done_bits;
- snd_pcm_format_t sample_format;
- float max_sample_val;
- unsigned long user_nperiods;
- unsigned long nfragments;
- int max_level;
- int min_level;
- unsigned long last_mask;
- unsigned long silence_pending;
- snd_ctl_t *ctl_handle;
- snd_pcm_t *playback_handle;
- snd_pcm_t *capture_handle;
- snd_pcm_hw_params_t *playback_hw_params;
- snd_pcm_sw_params_t *playback_sw_params;
- snd_pcm_hw_params_t *capture_hw_params;
- snd_pcm_sw_params_t *capture_sw_params;
- jack_hardware_t *hw;
- ClockSyncStatus *clock_sync_data;
- struct _jack_engine *engine;
- jack_client_t *client;
- GSList *capture_ports;
- GSList *playback_ports;
-
- unsigned long input_monitor_mask;
-
- char hw_monitoring : 1;
- char all_monitor_in : 1;
- char capture_and_playback_not_synced : 1;
- char interleaved : 1;
-
- ReadCopyFunction read_via_copy;
- WriteCopyFunction write_via_copy;
- CopyCopyFunction channel_copy;
-
- SampleClockMode clock_mode;
- GSList *clock_sync_listeners;
- pthread_mutex_t clock_sync_lock;
- unsigned long next_clock_sync_listener_id;
- char has_clock_sync_reporting : 1;
- char has_hw_monitoring : 1;
-
- } alsa_driver_t;
-
- static __inline__ void alsa_driver_mark_channel_done (alsa_driver_t *driver, channel_t chn) {
- driver->channels_not_done &= ~(1<<chn);
- driver->silent[chn] = 0;
- }
-
- static __inline__ void alsa_driver_silence_on_channel (alsa_driver_t *driver, channel_t chn, nframes_t nframes) {
- if (driver->interleaved) {
- memset_interleave
- (driver->playback_addr[chn],
- 0, nframes * driver->sample_bytes,
- driver->interleave_unit,
- driver->playback_interleave_skip);
- } else {
- memset (driver->playback_addr[chn], 0, nframes * driver->sample_bytes);
- }
- alsa_driver_mark_channel_done (driver,chn);
- }
-
- static __inline__ void alsa_driver_silence_on_channel_no_mark (alsa_driver_t *driver, channel_t chn, nframes_t nframes) {
- if (driver->interleaved) {
- memset_interleave
- (driver->playback_addr[chn],
- 0, nframes * driver->sample_bytes,
- driver->interleave_unit,
- driver->playback_interleave_skip);
- } else {
- memset (driver->playback_addr[chn], 0, nframes * driver->sample_bytes);
- }
- }
-
- static __inline__ void alsa_driver_read_from_channel (alsa_driver_t *driver,
- channel_t channel, sample_t *buf,
- nframes_t nsamples,
- unsigned long offset)
- {
- driver->read_via_copy (buf,
- driver->capture_addr[channel] + offset,
- nsamples,
- driver->capture_interleave_skip);
- }
-
- static __inline__ void alsa_driver_write_to_channel (alsa_driver_t *driver,
- channel_t channel,
- sample_t *buf,
- nframes_t nsamples,
- unsigned long offset,
- gain_t gain)
- {
- driver->write_via_copy (driver->playback_addr[channel] + offset,
- buf,
- nsamples,
- driver->playback_interleave_skip,
- gain);
- alsa_driver_mark_channel_done (driver, channel);
- }
-
- static __inline__ void alsa_driver_copy_channel (alsa_driver_t *driver,
- channel_t input_channel,
- channel_t output_channel,
- nframes_t nsamples) {
-
- driver->channel_copy (driver->playback_addr[output_channel],
- driver->capture_addr[input_channel],
- nsamples * driver->sample_bytes,
- driver->playback_interleave_skip,
- driver->capture_interleave_skip);
- alsa_driver_mark_channel_done (driver, output_channel);
- }
-
- void alsa_driver_set_clock_sync_status (alsa_driver_t *driver, channel_t chn, ClockSyncStatus status);
- int alsa_driver_listen_for_clock_sync_status (alsa_driver_t *, ClockSyncListenerFunction, void *arg);
- int alsa_driver_stop_listen_for_clock_sync_status (alsa_driver_t *, int);
- void alsa_driver_clock_sync_notify (alsa_driver_t *, channel_t chn, ClockSyncStatus);
-
-
- #endif /* __jack_alsa_driver_h__ */
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