Lines Matching refs:dpcm
127 static inline unsigned int byte_pos(struct loopback_pcm *dpcm, unsigned int x) in byte_pos() argument
129 if (dpcm->pcm_rate_shift == NO_PITCH) { in byte_pos()
133 HZ * (unsigned long long)dpcm->pcm_rate_shift); in byte_pos()
135 return x - (x % dpcm->pcm_salign); in byte_pos()
138 static inline unsigned int frac_pos(struct loopback_pcm *dpcm, unsigned int x) in frac_pos() argument
140 if (dpcm->pcm_rate_shift == NO_PITCH) { /* no pitch */ in frac_pos()
143 x = div_u64(dpcm->pcm_rate_shift * (unsigned long long)x * HZ, in frac_pos()
149 static inline struct loopback_setup *get_setup(struct loopback_pcm *dpcm) in get_setup() argument
151 int device = dpcm->substream->pstr->pcm->device; in get_setup()
153 if (dpcm->substream->stream == SNDRV_PCM_STREAM_PLAYBACK) in get_setup()
155 return &dpcm->loopback->setup[dpcm->substream->number][device]; in get_setup()
158 static inline unsigned int get_notify(struct loopback_pcm *dpcm) in get_notify() argument
160 return get_setup(dpcm)->notify; in get_notify()
163 static inline unsigned int get_rate_shift(struct loopback_pcm *dpcm) in get_rate_shift() argument
165 return get_setup(dpcm)->rate_shift; in get_rate_shift()
169 static void loopback_timer_start(struct loopback_pcm *dpcm) in loopback_timer_start() argument
172 unsigned int rate_shift = get_rate_shift(dpcm); in loopback_timer_start()
174 if (rate_shift != dpcm->pcm_rate_shift) { in loopback_timer_start()
175 dpcm->pcm_rate_shift = rate_shift; in loopback_timer_start()
176 dpcm->period_size_frac = frac_pos(dpcm, dpcm->pcm_period_size); in loopback_timer_start()
178 if (dpcm->period_size_frac <= dpcm->irq_pos) { in loopback_timer_start()
179 dpcm->irq_pos %= dpcm->period_size_frac; in loopback_timer_start()
180 dpcm->period_update_pending = 1; in loopback_timer_start()
182 tick = dpcm->period_size_frac - dpcm->irq_pos; in loopback_timer_start()
183 tick = (tick + dpcm->pcm_bps - 1) / dpcm->pcm_bps; in loopback_timer_start()
184 dpcm->timer.expires = jiffies + tick; in loopback_timer_start()
185 add_timer(&dpcm->timer); in loopback_timer_start()
189 static inline void loopback_timer_stop(struct loopback_pcm *dpcm) in loopback_timer_stop() argument
191 del_timer(&dpcm->timer); in loopback_timer_stop()
192 dpcm->timer.expires = 0; in loopback_timer_stop()
249 static void loopback_active_notify(struct loopback_pcm *dpcm) in loopback_active_notify() argument
251 snd_ctl_notify(dpcm->loopback->card, in loopback_active_notify()
253 &get_setup(dpcm)->active_id); in loopback_active_notify()
259 struct loopback_pcm *dpcm = runtime->private_data; in loopback_trigger() local
260 struct loopback_cable *cable = dpcm->cable; in loopback_trigger()
268 dpcm->last_jiffies = jiffies; in loopback_trigger()
269 dpcm->pcm_rate_shift = 0; in loopback_trigger()
270 dpcm->last_drift = 0; in loopback_trigger()
274 loopback_timer_start(dpcm); in loopback_trigger()
277 loopback_active_notify(dpcm); in loopback_trigger()
283 loopback_timer_stop(dpcm); in loopback_trigger()
286 loopback_active_notify(dpcm); in loopback_trigger()
292 loopback_timer_stop(dpcm); in loopback_trigger()
298 dpcm->last_jiffies = jiffies; in loopback_trigger()
300 loopback_timer_start(dpcm); in loopback_trigger()
309 static void params_change_substream(struct loopback_pcm *dpcm, in params_change_substream() argument
314 if (dpcm == NULL || dpcm->substream == NULL) in params_change_substream()
316 dst_runtime = dpcm->substream->runtime; in params_change_substream()
319 dst_runtime->hw = dpcm->cable->hw; in params_change_substream()
325 struct loopback_pcm *dpcm = runtime->private_data; in params_change() local
326 struct loopback_cable *cable = dpcm->cable; in params_change()
342 struct loopback_pcm *dpcm = runtime->private_data; in loopback_prepare() local
343 struct loopback_cable *cable = dpcm->cable; in loopback_prepare()
352 dpcm->buf_pos = 0; in loopback_prepare()
353 dpcm->pcm_buffer_size = frames_to_bytes(runtime, runtime->buffer_size); in loopback_prepare()
356 dpcm->silent_size = dpcm->pcm_buffer_size; in loopback_prepare()
361 dpcm->irq_pos = 0; in loopback_prepare()
362 dpcm->period_update_pending = 0; in loopback_prepare()
363 dpcm->pcm_bps = bps; in loopback_prepare()
364 dpcm->pcm_salign = salign; in loopback_prepare()
365 dpcm->pcm_period_size = frames_to_bytes(runtime, runtime->period_size); in loopback_prepare()
367 mutex_lock(&dpcm->loopback->cable_lock); in loopback_prepare()
369 (get_setup(dpcm)->notify && in loopback_prepare()
373 mutex_unlock(&dpcm->loopback->cable_lock); in loopback_prepare()
378 static void clear_capture_buf(struct loopback_pcm *dpcm, unsigned int bytes) in clear_capture_buf() argument
380 struct snd_pcm_runtime *runtime = dpcm->substream->runtime; in clear_capture_buf()
382 unsigned int dst_off = dpcm->buf_pos; in clear_capture_buf()
384 if (dpcm->silent_size >= dpcm->pcm_buffer_size) in clear_capture_buf()
386 if (dpcm->silent_size + bytes > dpcm->pcm_buffer_size) in clear_capture_buf()
387 bytes = dpcm->pcm_buffer_size - dpcm->silent_size; in clear_capture_buf()
391 if (dst_off + size > dpcm->pcm_buffer_size) in clear_capture_buf()
392 size = dpcm->pcm_buffer_size - dst_off; in clear_capture_buf()
396 dpcm->silent_size += size; in clear_capture_buf()
453 static inline unsigned int bytepos_delta(struct loopback_pcm *dpcm, in bytepos_delta() argument
459 last_pos = byte_pos(dpcm, dpcm->irq_pos); in bytepos_delta()
460 dpcm->irq_pos += jiffies_delta * dpcm->pcm_bps; in bytepos_delta()
461 delta = byte_pos(dpcm, dpcm->irq_pos) - last_pos; in bytepos_delta()
462 if (delta >= dpcm->last_drift) in bytepos_delta()
463 delta -= dpcm->last_drift; in bytepos_delta()
464 dpcm->last_drift = 0; in bytepos_delta()
465 if (dpcm->irq_pos >= dpcm->period_size_frac) { in bytepos_delta()
466 dpcm->irq_pos %= dpcm->period_size_frac; in bytepos_delta()
467 dpcm->period_update_pending = 1; in bytepos_delta()
472 static inline void bytepos_finish(struct loopback_pcm *dpcm, in bytepos_finish() argument
475 dpcm->buf_pos += delta; in bytepos_finish()
476 dpcm->buf_pos %= dpcm->pcm_buffer_size; in bytepos_finish()
535 struct loopback_pcm *dpcm = (struct loopback_pcm *)data; in loopback_timer_function() local
538 spin_lock_irqsave(&dpcm->cable->lock, flags); in loopback_timer_function()
539 if (loopback_pos_update(dpcm->cable) & (1 << dpcm->substream->stream)) { in loopback_timer_function()
540 loopback_timer_start(dpcm); in loopback_timer_function()
541 if (dpcm->period_update_pending) { in loopback_timer_function()
542 dpcm->period_update_pending = 0; in loopback_timer_function()
543 spin_unlock_irqrestore(&dpcm->cable->lock, flags); in loopback_timer_function()
545 snd_pcm_period_elapsed(dpcm->substream); in loopback_timer_function()
549 spin_unlock_irqrestore(&dpcm->cable->lock, flags); in loopback_timer_function()
555 struct loopback_pcm *dpcm = runtime->private_data; in loopback_pointer() local
558 spin_lock(&dpcm->cable->lock); in loopback_pointer()
559 loopback_pos_update(dpcm->cable); in loopback_pointer()
560 pos = dpcm->buf_pos; in loopback_pointer()
561 spin_unlock(&dpcm->cable->lock); in loopback_pointer()
590 struct loopback_pcm *dpcm = runtime->private_data; in loopback_runtime_free() local
591 kfree(dpcm); in loopback_runtime_free()
604 struct loopback_pcm *dpcm = runtime->private_data; in loopback_hw_free() local
605 struct loopback_cable *cable = dpcm->cable; in loopback_hw_free()
607 mutex_lock(&dpcm->loopback->cable_lock); in loopback_hw_free()
609 mutex_unlock(&dpcm->loopback->cable_lock); in loopback_hw_free()
666 struct loopback_pcm *dpcm; in loopback_open() local
672 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL); in loopback_open()
673 if (!dpcm) { in loopback_open()
677 dpcm->loopback = loopback; in loopback_open()
678 dpcm->substream = substream; in loopback_open()
679 setup_timer(&dpcm->timer, loopback_timer_function, in loopback_open()
680 (unsigned long)dpcm); in loopback_open()
686 kfree(dpcm); in loopback_open()
694 dpcm->cable = cable; in loopback_open()
695 cable->streams[substream->stream] = dpcm; in loopback_open()
721 runtime->private_data = dpcm; in loopback_open()
723 if (get_notify(dpcm)) in loopback_open()
735 struct loopback_pcm *dpcm = substream->runtime->private_data; in loopback_close() local
739 loopback_timer_stop(dpcm); in loopback_close()
1060 struct loopback_pcm *dpcm, in print_dpcm_info() argument
1064 if (dpcm == NULL) { in print_dpcm_info()
1068 snd_iprintf(buffer, " buffer_size:\t%u\n", dpcm->pcm_buffer_size); in print_dpcm_info()
1069 snd_iprintf(buffer, " buffer_pos:\t\t%u\n", dpcm->buf_pos); in print_dpcm_info()
1070 snd_iprintf(buffer, " silent_size:\t%u\n", dpcm->silent_size); in print_dpcm_info()
1071 snd_iprintf(buffer, " period_size:\t%u\n", dpcm->pcm_period_size); in print_dpcm_info()
1072 snd_iprintf(buffer, " bytes_per_sec:\t%u\n", dpcm->pcm_bps); in print_dpcm_info()
1073 snd_iprintf(buffer, " sample_align:\t%u\n", dpcm->pcm_salign); in print_dpcm_info()
1074 snd_iprintf(buffer, " rate_shift:\t\t%u\n", dpcm->pcm_rate_shift); in print_dpcm_info()
1076 dpcm->period_update_pending); in print_dpcm_info()
1077 snd_iprintf(buffer, " irq_pos:\t\t%u\n", dpcm->irq_pos); in print_dpcm_info()
1078 snd_iprintf(buffer, " period_frac:\t%u\n", dpcm->period_size_frac); in print_dpcm_info()
1080 dpcm->last_jiffies, jiffies); in print_dpcm_info()
1081 snd_iprintf(buffer, " timer_expires:\t%lu\n", dpcm->timer.expires); in print_dpcm_info()