1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2005 by Linus Nielsen Feltzing
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
21 #include "pcm_record.h"
38 /***************************************************************************/
40 extern struct thread_entry
*codec_thread_p
;
42 /** General recording state **/
43 static bool is_recording
; /* We are recording */
44 static bool is_paused
; /* We have paused */
45 static unsigned long errors
; /* An error has occured */
46 static unsigned long warnings
; /* Warning */
47 static int flush_interrupts
= 0; /* Number of messages queued that
48 should interrupt a flush in
50 for a safety net and a prompt
51 response to stop, split and pause
53 only interrupts a flush initiated
56 /* Utility functions for setting/clearing flushing interrupt flag */
57 static inline void flush_interrupt(void)
60 logf("flush int: %d", flush_interrupts
);
63 static inline void clear_flush_interrupt(void)
65 if (--flush_interrupts
< 0)
69 /** Stats on encoded data for current file **/
70 static size_t num_rec_bytes
; /* Num bytes recorded */
71 static unsigned long num_rec_samples
; /* Number of PCM samples recorded */
73 /** Stats on encoded data for all files from start to stop **/
75 static unsigned long long accum_rec_bytes
; /* total size written to chunks */
76 static unsigned long long accum_pcm_samples
; /* total pcm count processed */
79 /* Keeps data about current file and is sent as event data for codec */
80 static struct enc_file_event_data rec_fdata IDATA_ATTR
=
89 /** These apply to current settings **/
90 static int rec_source
; /* current rec_source setting */
91 static int rec_frequency
; /* current frequency setting */
92 static unsigned long sample_rate
; /* Sample rate in HZ */
93 static int num_channels
; /* Current number of channels */
94 static int rec_mono_mode
; /* how mono is created */
95 static struct encoder_config enc_config
; /* Current encoder configuration */
96 static unsigned long pre_record_ticks
; /* pre-record time in ticks */
98 /****************************************************************************
99 use 2 circular buffers:
100 pcm_buffer=DMA output buffer: chunks (8192 Bytes) of raw pcm audio data
101 enc_buffer=encoded audio buffer: storage for encoder output data
104 1. when entering recording_screen DMA feeds the ringbuffer pcm_buffer
105 2. if enough pcm data are available the encoder codec does encoding of pcm
106 chunks (4-8192 Bytes) into ringbuffer enc_buffer in codec_thread
107 3. pcmrec_callback detects enc_buffer 'near full' and writes data to disk
109 Functions calls (basic encoder steps):
110 1.main: audio_load_encoder(); start the encoder
111 2.encoder: enc_get_inputs(); get encoder recording settings
112 3.encoder: enc_set_parameters(); set the encoder parameters
113 4.encoder: enc_get_pcm_data(); get n bytes of unprocessed pcm data
114 5.encoder: enc_unget_pcm_data(); put n bytes of data back (optional)
115 6.encoder: enc_get_chunk(); get a ptr to next enc chunk
116 7.encoder: <process enc chunk> compress and store data to enc chunk
117 8.encoder: enc_finish_chunk(); inform main about chunk processed and
118 is available to be written to a file.
119 Encoder can place any number of chunks
120 of PCM data in a single output chunk
121 but must stay within its output chunk
123 9.encoder: repeat 4. to 8.
124 A.pcmrec: enc_events_callback(); called for certain events
127 ****************************************************************************/
129 /** buffer parameters where incoming PCM data is placed **/
130 #define PCM_NUM_CHUNKS 256 /* Power of 2 */
131 #define PCM_CHUNK_SIZE 8192 /* Power of 2 */
132 #define PCM_CHUNK_MASK (PCM_NUM_CHUNKS*PCM_CHUNK_SIZE - 1)
134 #define GET_PCM_CHUNK(offset) ((long *)(pcm_buffer + (offset)))
135 #define GET_ENC_CHUNK(index) ENC_CHUNK_HDR(enc_buffer + enc_chunk_size*(index))
136 #define INC_ENC_INDEX(index) \
137 { if (++index >= enc_num_chunks) index = 0; }
138 #define DEC_ENC_INDEX(index) \
139 { if (--index < 0) index = enc_num_chunks - 1; }
141 static size_t rec_buffer_size
; /* size of available buffer */
142 static unsigned char *pcm_buffer
; /* circular recording buffer */
143 static unsigned char *enc_buffer
; /* circular encoding buffer */
145 static unsigned long *wrap_id_p
; /* magic at wrap position - a debugging
146 aid to check if the encoder data
147 spilled out of its chunk */
149 static volatile int dma_wr_pos
; /* current DMA write pos */
150 static int pcm_rd_pos
; /* current PCM read pos */
151 static int pcm_enc_pos
; /* position encoder is processing */
152 static volatile bool dma_lock
; /* lock DMA write position */
153 static int enc_wr_index
; /* encoder chunk write index */
154 static int enc_rd_index
; /* encoder chunk read index */
155 static int enc_num_chunks
; /* number of chunks in ringbuffer */
156 static size_t enc_chunk_size
; /* maximum encoder chunk size */
157 static unsigned long enc_sample_rate
; /* sample rate used by encoder */
158 static bool pcmrec_context
= false; /* called by pcmrec thread? */
159 static bool pcm_buffer_empty
; /* all pcm chunks processed? */
161 /** file flushing **/
162 static int low_watermark
; /* Low watermark to stop flush */
163 static int high_watermark
; /* max chunk limit for data flush */
164 static unsigned long spinup_time
= 35*HZ
/10; /* Fudged spinup time */
165 static int last_storage_spinup_time
= -1;/* previous spin time used */
166 #ifdef HAVE_PRIORITY_SCHEDULING
167 static int flood_watermark
; /* boost thread priority when here */
170 /* Constants that control watermarks */
171 #define LOW_SECONDS 1 /* low watermark time till empty */
172 #define MINI_CHUNKS 10 /* chunk count for mini flush */
173 #ifdef HAVE_PRIORITY_SCHEDULING
174 #define PRIO_SECONDS 10 /* max flush time before priority boost */
177 #define PANIC_SECONDS 5 /* flood watermark time until full */
178 #define FLUSH_SECONDS 7 /* flush watermark time until full */
180 #define PANIC_SECONDS 8
181 #define FLUSH_SECONDS 10
184 /** encoder events **/
185 static void (*enc_events_callback
)(enum enc_events event
, void *data
);
187 /** Path queue for files to write **/
188 #define FNQ_MIN_NUM_PATHS 16 /* minimum number of paths to hold */
189 #define FNQ_MAX_NUM_PATHS 64 /* maximum number of paths to hold */
190 static unsigned char *fn_queue
; /* pointer to first filename */
191 static ssize_t fnq_size
; /* capacity of queue in bytes */
192 static int fnq_rd_pos
; /* current read position */
193 static int fnq_wr_pos
; /* current write position */
194 #define FNQ_NEXT(pos) \
195 ({ int p = (pos) + MAX_PATH; \
199 #define FNQ_PREV(pos) \
200 ({ int p = (pos) - MAX_PATH; \
202 p = fnq_size - MAX_PATH; \
207 PCMREC_FLUSH_INTERRUPTABLE
= 0x8000000, /* Flush can be interrupted by
208 incoming messages - combine
209 with other constants */
210 PCMREC_FLUSH_ALL
= 0x7ffffff, /* Flush all files */
211 PCMREC_FLUSH_MINI
= 0x7fffffe, /* Flush a small number of
213 PCMREC_FLUSH_IF_HIGH
= 0x0000000, /* Flush if high watermark
217 /***************************************************************************/
219 static struct event_queue pcmrec_queue SHAREDBSS_ATTR
;
220 static struct queue_sender_list pcmrec_queue_send SHAREDBSS_ATTR
;
221 static long pcmrec_stack
[3*DEFAULT_STACK_SIZE
/sizeof(long)];
222 static const char pcmrec_thread_name
[] = "pcmrec";
223 static struct thread_entry
*pcmrec_thread_p
;
225 static void pcmrec_thread(void);
230 PCMREC_INIT
, /* enable recording */
231 PCMREC_CLOSE
, /* close recording */
232 PCMREC_OPTIONS
, /* set recording options */
233 PCMREC_RECORD
, /* record a new file */
234 PCMREC_STOP
, /* stop the current recording */
235 PCMREC_PAUSE
, /* pause the current recording */
236 PCMREC_RESUME
, /* resume the current recording */
238 PCMREC_FLUSH_NUM
, /* flush a number of files out */
242 /*******************************************************************/
243 /* Functions that are not executing in the pcmrec_thread first */
244 /*******************************************************************/
246 /* Callback for when more data is ready - called in interrupt context */
247 static int pcm_rec_have_more(int status
)
251 /* some error condition */
252 if (status
== DMA_REC_ERROR_DMA
)
254 /* Flush recorded data to disk and stop recording */
255 queue_post(&pcmrec_queue
, PCMREC_STOP
, 0);
258 /* else try again next transmission */
262 /* advance write position */
263 int next_pos
= (dma_wr_pos
+ PCM_CHUNK_SIZE
) & PCM_CHUNK_MASK
;
265 /* set pcm ovf if processing start position is inside current
267 if ((unsigned)(pcm_enc_pos
- next_pos
) < PCM_CHUNK_SIZE
)
268 warnings
|= PCMREC_W_PCM_BUFFER_OVF
;
270 dma_wr_pos
= next_pos
;
273 pcm_record_more(GET_PCM_CHUNK(dma_wr_pos
), PCM_CHUNK_SIZE
);
275 } /* pcm_rec_have_more */
277 static void reset_hardware(void)
279 /* reset pcm to defaults (playback only) */
280 pcm_set_frequency(HW_SAMPR_DEFAULT
);
281 audio_set_output_source(AUDIO_SRC_PLAYBACK
);
282 pcm_apply_settings();
285 /** pcm_rec_* group **/
288 * Clear all errors and warnings
290 void pcm_rec_error_clear(void)
292 errors
= warnings
= 0;
293 } /* pcm_rec_error_clear */
296 * Check mode, errors and warnings
298 unsigned long pcm_rec_status(void)
300 unsigned long ret
= 0;
303 ret
|= AUDIO_STATUS_RECORD
;
304 else if (pre_record_ticks
)
305 ret
|= AUDIO_STATUS_PRERECORD
;
308 ret
|= AUDIO_STATUS_PAUSE
;
311 ret
|= AUDIO_STATUS_ERROR
;
314 ret
|= AUDIO_STATUS_WARNING
;
317 } /* pcm_rec_status */
320 * Return warnings that have occured since recording started
322 unsigned long pcm_rec_get_warnings(void)
328 int pcm_rec_current_bitrate(void)
330 if (accum_pcm_samples
== 0)
333 return (int)(8*accum_rec_bytes
*enc_sample_rate
/ (1000*accum_pcm_samples
));
334 } /* pcm_rec_current_bitrate */
338 int pcm_rec_encoder_afmt(void)
340 return enc_config
.afmt
;
341 } /* pcm_rec_encoder_afmt */
345 int pcm_rec_rec_format(void)
347 return afmt_rec_format
[enc_config
.afmt
];
348 } /* pcm_rec_rec_format */
352 unsigned long pcm_rec_sample_rate(void)
354 /* Which is better ?? */
356 return enc_sample_rate
;
359 } /* audio_get_sample_rate */
363 * Creates pcmrec_thread
365 void pcm_rec_init(void)
367 queue_init(&pcmrec_queue
, true);
369 create_thread(pcmrec_thread
, pcmrec_stack
, sizeof(pcmrec_stack
),
370 0, pcmrec_thread_name
IF_PRIO(, PRIORITY_RECORDING
)
372 queue_enable_queue_send(&pcmrec_queue
, &pcmrec_queue_send
,
376 /** audio_* group **/
379 * Initializes recording - call before calling any other recording function
381 void audio_init_recording(unsigned int buffer_offset
)
383 logf("audio_init_recording");
384 queue_send(&pcmrec_queue
, PCMREC_INIT
, 0);
385 logf("audio_init_recording done");
387 } /* audio_init_recording */
390 * Closes recording - call audio_stop_recording first
392 void audio_close_recording(void)
394 logf("audio_close_recording");
395 queue_send(&pcmrec_queue
, PCMREC_CLOSE
, 0);
396 logf("audio_close_recording done");
397 } /* audio_close_recording */
400 * Sets recording parameters
402 void audio_set_recording_options(struct audio_recording_options
*options
)
404 logf("audio_set_recording_options");
405 queue_send(&pcmrec_queue
, PCMREC_OPTIONS
, (intptr_t)options
);
406 logf("audio_set_recording_options done");
407 } /* audio_set_recording_options */
410 * Start recording if not recording or else split
412 void audio_record(const char *filename
)
414 logf("audio_record: %s", filename
);
416 queue_send(&pcmrec_queue
, PCMREC_RECORD
, (intptr_t)filename
);
417 logf("audio_record_done");
421 * audio_record wrapper for API compatibility with HW codec
423 void audio_new_file(const char *filename
)
425 audio_record(filename
);
426 } /* audio_new_file */
429 * Stop current recording if recording
431 void audio_stop_recording(void)
433 logf("audio_stop_recording");
435 queue_post(&pcmrec_queue
, PCMREC_STOP
, 0);
436 logf("audio_stop_recording done");
437 } /* audio_stop_recording */
440 * Pause current recording
442 void audio_pause_recording(void)
444 logf("audio_pause_recording");
446 queue_post(&pcmrec_queue
, PCMREC_PAUSE
, 0);
447 logf("audio_pause_recording done");
448 } /* audio_pause_recording */
451 * Resume current recording if paused
453 void audio_resume_recording(void)
455 logf("audio_resume_recording");
456 queue_post(&pcmrec_queue
, PCMREC_RESUME
, 0);
457 logf("audio_resume_recording done");
458 } /* audio_resume_recording */
461 * Note that microphone is mono, only left value is used
462 * See audiohw_set_recvol() for exact ranges.
464 * @param type AUDIO_GAIN_MIC, AUDIO_GAIN_LINEIN
467 void audio_set_recording_gain(int left
, int right
, int type
)
469 //logf("rcmrec: t=%d l=%d r=%d", type, left, right);
470 audiohw_set_recvol(left
, right
, type
);
471 } /* audio_set_recording_gain */
473 /** Information about current state **/
476 * Return current recorded time in ticks (playback eqivalent time)
478 unsigned long audio_recorded_time(void)
480 if (!is_recording
|| enc_sample_rate
== 0)
483 /* return actual recorded time a la encoded data even if encoder rate
484 doesn't match the pcm rate */
485 return (long)(HZ
*(unsigned long long)num_rec_samples
/ enc_sample_rate
);
486 } /* audio_recorded_time */
489 * Return number of bytes encoded to output
491 unsigned long audio_num_recorded_bytes(void)
496 return num_rec_bytes
;
497 } /* audio_num_recorded_bytes */
499 /***************************************************************************/
501 /* Functions that execute in the context of pcmrec_thread */
503 /***************************************************************************/
505 /** Filename Queue **/
507 /* returns true if the queue is empty */
508 static inline bool pcmrec_fnq_is_empty(void)
510 return fnq_rd_pos
== fnq_wr_pos
;
511 } /* pcmrec_fnq_is_empty */
513 /* empties the filename queue */
514 static inline void pcmrec_fnq_set_empty(void)
516 fnq_rd_pos
= fnq_wr_pos
;
517 } /* pcmrec_fnq_set_empty */
519 /* returns true if the queue is full */
520 static bool pcmrec_fnq_is_full(void)
522 ssize_t size
= fnq_wr_pos
- fnq_rd_pos
;
526 return size
>= fnq_size
- MAX_PATH
;
527 } /* pcmrec_fnq_is_full */
529 /* queue another filename - will overwrite oldest one if full */
530 static bool pcmrec_fnq_add_filename(const char *filename
)
532 strncpy(fn_queue
+ fnq_wr_pos
, filename
, MAX_PATH
);
533 fnq_wr_pos
= FNQ_NEXT(fnq_wr_pos
);
535 if (fnq_rd_pos
!= fnq_wr_pos
)
539 fnq_rd_pos
= FNQ_NEXT(fnq_rd_pos
);
541 } /* pcmrec_fnq_add_filename */
543 /* replace the last filename added */
544 static bool pcmrec_fnq_replace_tail(const char *filename
)
548 if (pcmrec_fnq_is_empty())
551 pos
= FNQ_PREV(fnq_wr_pos
);
553 strncpy(fn_queue
+ pos
, filename
, MAX_PATH
);
556 } /* pcmrec_fnq_replace_tail */
558 /* pulls the next filename from the queue */
559 static bool pcmrec_fnq_get_filename(char *filename
)
561 if (pcmrec_fnq_is_empty())
565 strncpy(filename
, fn_queue
+ fnq_rd_pos
, MAX_PATH
);
567 fnq_rd_pos
= FNQ_NEXT(fnq_rd_pos
);
569 } /* pcmrec_fnq_get_filename */
571 /* close the file number pointed to by fd_p */
572 static void pcmrec_close_file(int *fd_p
)
575 return; /* preserve error */
577 if (close(*fd_p
) != 0)
578 errors
|= PCMREC_E_IO
;
581 } /* pcmrec_close_file */
583 /** Data Flushing **/
586 * called after callback to update sizes if codec changed the amount of data
589 static inline void pcmrec_update_sizes_inl(size_t prev_enc_size
,
590 unsigned long prev_num_pcm
)
592 if (rec_fdata
.new_enc_size
!= prev_enc_size
)
594 ssize_t size_diff
= rec_fdata
.new_enc_size
- prev_enc_size
;
595 num_rec_bytes
+= size_diff
;
597 accum_rec_bytes
+= size_diff
;
601 if (rec_fdata
.new_num_pcm
!= prev_num_pcm
)
603 unsigned long pcm_diff
= rec_fdata
.new_num_pcm
- prev_num_pcm
;
604 num_rec_samples
+= pcm_diff
;
606 accum_pcm_samples
+= pcm_diff
;
609 } /* pcmrec_update_sizes_inl */
611 /* don't need to inline every instance */
612 static void pcmrec_update_sizes(size_t prev_enc_size
,
613 unsigned long prev_num_pcm
)
615 pcmrec_update_sizes_inl(prev_enc_size
, prev_num_pcm
);
616 } /* pcmrec_update_sizes */
618 static void pcmrec_start_file(void)
620 size_t enc_size
= rec_fdata
.new_enc_size
;
621 unsigned long num_pcm
= rec_fdata
.new_num_pcm
;
622 int curr_rec_file
= rec_fdata
.rec_file
;
623 char filename
[MAX_PATH
];
625 /* must always pull the filename that matches with this queue */
626 if (!pcmrec_fnq_get_filename(filename
))
628 logf("start file: fnq empty");
630 errors
|= PCMREC_E_FNQ_DESYNC
;
632 else if (errors
!= 0)
634 logf("start file: error already");
636 else if (curr_rec_file
>= 0)
638 /* Any previous file should have been closed */
639 logf("start file: file already open");
640 errors
|= PCMREC_E_FNQ_DESYNC
;
644 rec_fdata
.chunk
->flags
|= CHUNKF_ERROR
;
646 /* encoder can set error flag here and should increase
647 enc_new_size and pcm_new_size to reflect additional
648 data written if any */
649 rec_fdata
.filename
= filename
;
650 enc_events_callback(ENC_START_FILE
, &rec_fdata
);
652 if (errors
== 0 && (rec_fdata
.chunk
->flags
& CHUNKF_ERROR
))
654 logf("start file: enc error");
655 errors
|= PCMREC_E_ENCODER
;
660 pcmrec_close_file(&curr_rec_file
);
661 /* Write no more to this file */
662 rec_fdata
.chunk
->flags
|= CHUNKF_END_FILE
;
666 pcmrec_update_sizes(enc_size
, num_pcm
);
669 rec_fdata
.chunk
->flags
&= ~CHUNKF_START_FILE
;
670 } /* pcmrec_start_file */
672 static inline void pcmrec_write_chunk(void)
674 size_t enc_size
= rec_fdata
.new_enc_size
;
675 unsigned long num_pcm
= rec_fdata
.new_num_pcm
;
678 rec_fdata
.chunk
->flags
|= CHUNKF_ERROR
;
680 enc_events_callback(ENC_WRITE_CHUNK
, &rec_fdata
);
682 if ((long)rec_fdata
.chunk
->flags
>= 0)
684 pcmrec_update_sizes_inl(enc_size
, num_pcm
);
686 else if (errors
== 0)
688 logf("wr chk enc error %lu %lu",
689 rec_fdata
.chunk
->enc_size
, rec_fdata
.chunk
->num_pcm
);
690 errors
|= PCMREC_E_ENCODER
;
692 } /* pcmrec_write_chunk */
694 static void pcmrec_end_file(void)
696 /* all data in output buffer for current file will have been
697 written and encoder can now do any nescessary steps to
698 finalize the written file */
699 size_t enc_size
= rec_fdata
.new_enc_size
;
700 unsigned long num_pcm
= rec_fdata
.new_num_pcm
;
702 enc_events_callback(ENC_END_FILE
, &rec_fdata
);
706 if (rec_fdata
.chunk
->flags
& CHUNKF_ERROR
)
708 logf("end file: enc error");
709 errors
|= PCMREC_E_ENCODER
;
713 pcmrec_update_sizes(enc_size
, num_pcm
);
717 /* Force file close if error */
719 pcmrec_close_file(&rec_fdata
.rec_file
);
721 rec_fdata
.chunk
->flags
&= ~CHUNKF_END_FILE
;
722 } /* pcmrec_end_file */
725 * Update buffer watermarks with spinup time compensation
727 * All this assumes reasonable data rates, chunk sizes and sufficient
728 * memory for the most part. Some dumb checks are included but perhaps
729 * are pointless since this all will break down at extreme limits that
730 * are currently not applicable to any supported device.
732 static void pcmrec_refresh_watermarks(void)
734 logf("ata spinup: %d", storage_spinup_time());
736 /* set the low mark for when flushing stops if automatic */
737 low_watermark
= (LOW_SECONDS
*4*sample_rate
+ (enc_chunk_size
-1))
739 logf("low wmk: %d", low_watermark
);
741 #ifdef HAVE_PRIORITY_SCHEDULING
742 /* panic boost thread priority if 2 seconds of ground is lost -
743 this allows encoder to boost with just under a second of
744 pcm data (if not yet full enough to boost itself)
745 and not falsely trip the alarm. */
746 flood_watermark
= enc_num_chunks
-
747 (PANIC_SECONDS
*4*sample_rate
+ (enc_chunk_size
-1))
750 if (flood_watermark
< low_watermark
)
752 logf("warning: panic < low");
753 flood_watermark
= low_watermark
;
756 logf("flood at: %d", flood_watermark
);
758 spinup_time
= last_storage_spinup_time
= storage_spinup_time();
760 /* write at 8s + st remaining in enc_buffer - range 12s to
761 20s total - default to 3.5s spinup. */
762 if (spinup_time
== 0)
763 spinup_time
= 35*HZ
/10; /* default - cozy */
764 else if (spinup_time
< 2*HZ
)
765 spinup_time
= 2*HZ
; /* ludicrous - ramdisk? */
766 else if (spinup_time
> 10*HZ
)
767 spinup_time
= 10*HZ
; /* do you have a functioning HD? */
769 /* try to start writing with 10s remaining after disk spinup */
770 high_watermark
= enc_num_chunks
-
771 ((FLUSH_SECONDS
*HZ
+ spinup_time
)*4*sample_rate
+
772 (enc_chunk_size
-1)*HZ
) / (enc_chunk_size
*HZ
);
774 if (high_watermark
< low_watermark
)
776 high_watermark
= low_watermark
;
778 logf("warning: low 'write at'");
781 logf("write at: %d", high_watermark
);
782 } /* pcmrec_refresh_watermarks */
787 * This function is called when queue_get_w_tmo times out.
789 * Set flush_num to the number of files to flush to disk or to
790 * a PCMREC_FLUSH_* constant.
792 static void pcmrec_flush(unsigned flush_num
)
794 #ifdef HAVE_PRIORITY_SCHEDULING
795 static unsigned long last_flush_tick
; /* tick when function returned */
796 unsigned long start_tick
; /* When flush started */
797 unsigned long prio_tick
; /* Timeout for auto boost */
798 int prio_pcmrec
; /* Current thread priority for pcmrec */
799 int prio_codec
; /* Current thread priority for codec */
801 int num_ready
; /* Number of chunks ready at start */
802 unsigned remaining
; /* Number of file starts remaining */
803 unsigned chunks_flushed
; /* Chunks flushed (for mini flush only) */
804 bool interruptable
; /* Flush can be interupted */
806 num_ready
= enc_wr_index
- enc_rd_index
;
808 num_ready
+= enc_num_chunks
;
810 /* save interruptable flag and remove it to get the actual count */
811 interruptable
= (flush_num
& PCMREC_FLUSH_INTERRUPTABLE
) != 0;
812 flush_num
&= ~PCMREC_FLUSH_INTERRUPTABLE
;
819 if (storage_spinup_time() != last_storage_spinup_time
)
820 pcmrec_refresh_watermarks();
822 /* enough available? no? then leave */
823 if (num_ready
< high_watermark
)
825 } /* endif (flush_num == 0) */
827 #ifdef HAVE_PRIORITY_SCHEDULING
828 start_tick
= current_tick
;
829 prio_tick
= start_tick
+ PRIO_SECONDS
*HZ
+ spinup_time
;
831 if (flush_num
== 0 && TIME_BEFORE(current_tick
, last_flush_tick
+ HZ
/2))
833 /* if we're getting called too much and this isn't forced,
834 boost stat by expiring timeout in advance */
835 logf("too frequent flush");
836 prio_tick
= current_tick
- 1;
840 prio_codec
= -1; /* GCC is too stoopid to figure out it doesn't
844 logf("writing:%d(%d):%s%s", num_ready
, flush_num
,
845 interruptable
? "i" : "",
846 flush_num
== PCMREC_FLUSH_MINI
? "m" : "");
850 remaining
= flush_num
;
853 while (num_ready
> 0)
855 /* check current number of encoder chunks */
856 int num
= enc_wr_index
- enc_rd_index
;
858 num
+= enc_num_chunks
;
860 if (num
<= low_watermark
&&
861 (flush_num
== PCMREC_FLUSH_IF_HIGH
|| num
<= 0))
863 logf("low data: %d", num
);
864 break; /* data remaining is below threshold */
867 if (interruptable
&& flush_interrupts
> 0)
869 logf("int at: %d", num
);
870 break; /* interrupted */
873 #ifdef HAVE_PRIORITY_SCHEDULING
874 if (prio_pcmrec
== -1 && (num
>= flood_watermark
||
875 TIME_AFTER(current_tick
, prio_tick
)))
877 /* losing ground or holding without progress - boost
878 priority until finished */
879 logf("pcmrec: boost (%s)",
880 num
>= flood_watermark
? "num" : "time");
881 prio_pcmrec
= thread_set_priority(NULL
,
882 thread_get_priority(NULL
) - 4);
883 prio_codec
= thread_set_priority(codec_thread_p
,
884 thread_get_priority(codec_thread_p
) - 4);
888 rec_fdata
.chunk
= GET_ENC_CHUNK(enc_rd_index
);
889 rec_fdata
.new_enc_size
= rec_fdata
.chunk
->enc_size
;
890 rec_fdata
.new_num_pcm
= rec_fdata
.chunk
->num_pcm
;
892 if (rec_fdata
.chunk
->flags
& CHUNKF_START_FILE
)
895 if (--remaining
== 0)
896 num_ready
= 0; /* stop on next loop - must write this
897 chunk if it has data */
900 pcmrec_write_chunk();
902 if (rec_fdata
.chunk
->flags
& CHUNKF_END_FILE
)
905 INC_ENC_INDEX(enc_rd_index
);
913 if (flush_num
== PCMREC_FLUSH_MINI
&&
914 ++chunks_flushed
>= MINI_CHUNKS
)
916 logf("mini flush break");
919 /* no yielding; the file apis called in the codecs do that
924 if (rec_fdata
.rec_file
>= 0 && fsync(rec_fdata
.rec_file
) != 0)
925 errors
|= PCMREC_E_IO
;
929 #ifdef HAVE_PRIORITY_SCHEDULING
930 if (prio_pcmrec
!= -1)
932 /* return to original priorities */
933 logf("pcmrec: unboost priority");
934 thread_set_priority(NULL
, prio_pcmrec
);
935 thread_set_priority(codec_thread_p
, prio_codec
);
938 last_flush_tick
= current_tick
; /* save tick when we left */
945 * Marks a new stream in the buffer and gives the encoder a chance for special
946 * handling of transition from one to the next. The encoder may change the
947 * chunk that ends the old stream by requesting more chunks and similiarly for
948 * the new but must always advance the position though the interface. It can
949 * later reject any data it cares to when writing the file but should mark the
950 * chunk so it can recognize this. ENC_WRITE_CHUNK event must be able to accept
951 * a NULL data pointer without error as well.
953 static int pcmrec_get_chunk_index(struct enc_chunk_hdr
*chunk
)
955 return ((char *)chunk
- (char *)enc_buffer
) / enc_chunk_size
;
956 } /* pcmrec_get_chunk_index */
958 static struct enc_chunk_hdr
* pcmrec_get_prev_chunk(int index
)
960 DEC_ENC_INDEX(index
);
961 return GET_ENC_CHUNK(index
);
962 } /* pcmrec_get_prev_chunk */
964 static void pcmrec_new_stream(const char *filename
, /* next file name */
965 unsigned long flags
, /* CHUNKF_* flags */
966 int pre_index
) /* index for prerecorded data */
968 logf("pcmrec_new_stream");
969 char path
[MAX_PATH
]; /* place to copy filename so sender can be released */
971 struct enc_buffer_event_data data
;
972 bool (*fnq_add_fn
)(const char *) = NULL
; /* function to use to add
974 struct enc_chunk_hdr
*start
= NULL
; /* pointer to starting chunk of
976 bool did_flush
= false; /* did a flush occurr? */
979 strncpy(path
, filename
, MAX_PATH
);
980 queue_reply(&pcmrec_queue
, 0); /* We have all we need */
982 data
.pre_chunk
= NULL
;
983 data
.chunk
= GET_ENC_CHUNK(enc_wr_index
);
986 if (flags
& CHUNKF_END_FILE
)
988 data
.chunk
->flags
&= CHUNKF_START_FILE
| CHUNKF_END_FILE
;
990 if (data
.chunk
->flags
& CHUNKF_START_FILE
)
992 /* cannot start and end on same unprocessed chunk */
993 logf("file end on start");
994 flags
&= ~CHUNKF_END_FILE
;
996 else if (enc_rd_index
== enc_wr_index
)
998 /* all data flushed but file not ended - chunk will be left
1000 logf("end on dead end");
1001 data
.chunk
->flags
= 0;
1002 data
.chunk
->enc_size
= 0;
1003 data
.chunk
->num_pcm
= 0;
1004 data
.chunk
->enc_data
= NULL
;
1005 INC_ENC_INDEX(enc_wr_index
);
1006 data
.chunk
= GET_ENC_CHUNK(enc_wr_index
);
1010 struct enc_chunk_hdr
*last
= pcmrec_get_prev_chunk(enc_wr_index
);
1012 if (last
->flags
& CHUNKF_END_FILE
)
1014 /* end already processed and marked - can't end twice */
1015 logf("file end again");
1016 flags
&= ~CHUNKF_END_FILE
;
1022 if (flags
& CHUNKF_START_FILE
)
1024 bool pre
= flags
& CHUNKF_PRERECORD
;
1028 logf("stream prerecord start");
1029 start
= data
.pre_chunk
= GET_ENC_CHUNK(pre_index
);
1030 start
->flags
&= CHUNKF_START_FILE
| CHUNKF_PRERECORD
;
1034 logf("stream normal start");
1036 start
->flags
&= CHUNKF_START_FILE
;
1039 /* if encoder hasn't yet processed the last start - abort the start
1040 of the previous file queued or else it will be empty and invalid */
1041 if (start
->flags
& CHUNKF_START_FILE
)
1043 logf("replacing fnq tail: %s", filename
);
1044 fnq_add_fn
= pcmrec_fnq_replace_tail
;
1048 logf("adding filename: %s", filename
);
1049 fnq_add_fn
= pcmrec_fnq_add_filename
;
1054 pcmrec_context
= true; /* switch encoder context */
1055 enc_events_callback(ENC_REC_NEW_STREAM
, &data
);
1056 pcmrec_context
= false; /* switch back */
1058 if (flags
& CHUNKF_END_FILE
)
1060 int i
= pcmrec_get_chunk_index(data
.chunk
);
1061 pcmrec_get_prev_chunk(i
)->flags
|= CHUNKF_END_FILE
;
1066 if (!(flags
& CHUNKF_PRERECORD
))
1068 /* get stats on data added to start - sort of a prerecord
1070 int i
= pcmrec_get_chunk_index(data
.chunk
);
1071 struct enc_chunk_hdr
*chunk
= data
.chunk
;
1073 logf("start data: %d %d", i
, enc_wr_index
);
1076 num_rec_samples
= 0;
1078 while (i
!= enc_wr_index
)
1080 num_rec_bytes
+= chunk
->enc_size
;
1081 num_rec_samples
+= chunk
->num_pcm
;
1083 chunk
= GET_ENC_CHUNK(i
);
1086 start
->flags
&= ~CHUNKF_START_FILE
;
1090 start
->flags
|= CHUNKF_START_FILE
;
1092 /* flush all pending files out if full and adding */
1093 if (fnq_add_fn
== pcmrec_fnq_add_filename
&& pcmrec_fnq_is_full())
1096 pcmrec_flush(PCMREC_FLUSH_ALL
);
1103 /* Make sure to complete any interrupted high watermark */
1105 pcmrec_flush(PCMREC_FLUSH_IF_HIGH
);
1106 } /* pcmrec_new_stream */
1108 /** event handlers for pcmrec thread */
1111 static void pcmrec_init(void)
1113 unsigned char *buffer
;
1115 /* warings and errors */
1119 pcmrec_close_file(&rec_fdata
.rec_file
);
1120 rec_fdata
.rec_file
= -1;
1132 /* filename queue */
1138 num_rec_samples
= 0;
1140 accum_rec_bytes
= 0;
1141 accum_pcm_samples
= 0;
1144 pre_record_ticks
= 0;
1146 is_recording
= false;
1149 buffer
= audio_get_recording_buffer(&rec_buffer_size
);
1151 /* Line align pcm_buffer 2^4=16 bytes */
1152 pcm_buffer
= (unsigned char *)ALIGN_UP_P2((uintptr_t)buffer
, 4);
1153 enc_buffer
= pcm_buffer
+ ALIGN_UP_P2(PCM_NUM_CHUNKS
*PCM_CHUNK_SIZE
+
1154 PCM_MAX_FEED_SIZE
, 2);
1155 /* Adjust available buffer for possible align advancement */
1156 rec_buffer_size
-= pcm_buffer
- buffer
;
1158 pcm_init_recording();
1162 static void pcmrec_close(void)
1165 pre_record_ticks
= 0; /* Can't be prerecording any more */
1167 pcm_close_recording();
1169 audio_remove_encoder();
1170 } /* pcmrec_close */
1172 /* PCMREC_OPTIONS */
1173 static void pcmrec_set_recording_options(
1174 struct audio_recording_options
*options
)
1176 /* stop DMA transfer */
1178 pcm_stop_recording();
1180 rec_frequency
= options
->rec_frequency
;
1181 rec_source
= options
->rec_source
;
1182 num_channels
= options
->rec_channels
== 1 ? 1 : 2;
1183 rec_mono_mode
= options
->rec_mono_mode
;
1184 pre_record_ticks
= options
->rec_prerecord_time
* HZ
;
1185 enc_config
= options
->enc_config
;
1186 enc_config
.afmt
= rec_format_afmt
[enc_config
.rec_format
];
1188 #ifdef HAVE_SPDIF_IN
1189 if (rec_source
== AUDIO_SRC_SPDIF
)
1191 /* must measure SPDIF sample rate before configuring codecs */
1192 unsigned long sr
= spdif_measure_frequency();
1193 /* round to master list for SPDIF rate */
1194 int index
= round_value_to_list32(sr
, audio_master_sampr_list
,
1195 SAMPR_NUM_FREQ
, false);
1196 sample_rate
= audio_master_sampr_list
[index
];
1197 /* round to HW playback rates for monitoring */
1198 index
= round_value_to_list32(sr
, hw_freq_sampr
,
1199 HW_NUM_FREQ
, false);
1200 pcm_set_frequency(hw_freq_sampr
[index
]);
1201 /* encoders with a limited number of rates do their own rounding */
1206 /* set sample rate from frequency selection */
1207 sample_rate
= rec_freq_sampr
[rec_frequency
];
1208 pcm_set_frequency(sample_rate
);
1211 /* set monitoring */
1212 audio_set_output_source(rec_source
);
1214 /* apply hardware setting to start monitoring now */
1215 pcm_apply_settings();
1217 queue_reply(&pcmrec_queue
, 0); /* Release sender */
1219 if (audio_load_encoder(enc_config
.afmt
))
1221 /* start DMA transfer */
1222 dma_lock
= pre_record_ticks
== 0;
1223 pcm_record_data(pcm_rec_have_more
, GET_PCM_CHUNK(dma_wr_pos
),
1228 logf("set rec opt: enc load failed");
1229 errors
|= PCMREC_E_LOAD_ENCODER
;
1231 } /* pcmrec_set_recording_options */
1233 /* PCMREC_RECORD - start recording (not gapless)
1234 or split stream (gapless) */
1235 static void pcmrec_record(const char *filename
)
1237 unsigned long pre_sample_ticks
;
1239 unsigned long flags
;
1242 logf("pcmrec_record: %s", filename
);
1246 num_rec_samples
= 0;
1251 accum_rec_bytes
= 0;
1252 accum_pcm_samples
= 0;
1254 warnings
= 0; /* reset warnings */
1256 rd_start
= enc_wr_index
;
1257 pre_sample_ticks
= 0;
1259 pcmrec_refresh_watermarks();
1261 if (pre_record_ticks
)
1264 /* calculate number of available chunks */
1265 unsigned long avail_pre_chunks
= (enc_wr_index
- enc_rd_index
+
1266 enc_num_chunks
) % enc_num_chunks
;
1267 /* overflow at 974 seconds of prerecording at 44.1kHz */
1268 unsigned long pre_record_sample_ticks
=
1269 enc_sample_rate
*pre_record_ticks
;
1270 int pre_chunks
= 0; /* Counter to limit prerecorded time to
1271 prevent flood state at outset */
1273 logf("pre-st: %ld", pre_record_sample_ticks
);
1275 /* Get exact measure of recorded data as number of samples aren't
1276 nescessarily going to be the max for each chunk */
1277 for (; avail_pre_chunks
-- > 0;)
1279 struct enc_chunk_hdr
*chunk
;
1280 unsigned long chunk_sample_ticks
;
1284 chunk
= GET_ENC_CHUNK(i
);
1286 /* must have data to be counted */
1287 if (chunk
->enc_data
== NULL
)
1290 chunk_sample_ticks
= chunk
->num_pcm
*HZ
;
1293 pre_sample_ticks
+= chunk_sample_ticks
;
1294 num_rec_bytes
+= chunk
->enc_size
;
1295 num_rec_samples
+= chunk
->num_pcm
;
1298 /* stop here if enough already */
1299 if (pre_chunks
>= high_watermark
||
1300 pre_sample_ticks
>= pre_record_sample_ticks
)
1302 logf("pre-chks: %d", pre_chunks
);
1308 accum_rec_bytes
= num_rec_bytes
;
1309 accum_pcm_samples
= num_rec_samples
;
1313 enc_rd_index
= rd_start
;
1315 /* filename queue should be empty */
1316 if (!pcmrec_fnq_is_empty())
1318 logf("fnq: not empty!");
1319 pcmrec_fnq_set_empty();
1322 flags
= CHUNKF_START_FILE
;
1323 if (pre_sample_ticks
> 0)
1324 flags
|= CHUNKF_PRERECORD
;
1326 pre_index
= enc_rd_index
;
1330 is_recording
= true;
1334 /* already recording, just split the stream */
1335 logf("inserting split");
1336 flags
= CHUNKF_START_FILE
| CHUNKF_END_FILE
;
1340 pcmrec_new_stream(filename
, flags
, pre_index
);
1341 logf("pcmrec_record done");
1342 } /* pcmrec_record */
1345 static void pcmrec_stop(void)
1347 logf("pcmrec_stop");
1351 dma_lock
= true; /* lock dma write position */
1353 /* flush all available data first to avoid overflow while waiting
1354 for encoding to finish */
1355 pcmrec_flush(PCMREC_FLUSH_ALL
);
1357 /* wait for encoder to finish remaining data */
1358 while (errors
== 0 && !pcm_buffer_empty
)
1361 /* end stream at last data */
1362 pcmrec_new_stream(NULL
, CHUNKF_END_FILE
, 0);
1364 /* flush anything else encoder added */
1365 pcmrec_flush(PCMREC_FLUSH_ALL
);
1367 /* remove any pending file start not yet processed - should be at
1368 most one at enc_wr_index */
1369 pcmrec_fnq_get_filename(NULL
);
1370 /* encoder should abort any chunk it was in midst of processing */
1371 GET_ENC_CHUNK(enc_wr_index
)->flags
= CHUNKF_ABORT
;
1373 /* filename queue should be empty */
1374 if (!pcmrec_fnq_is_empty())
1376 logf("fnq: not empty!");
1377 pcmrec_fnq_set_empty();
1380 /* be absolutely sure the file is closed */
1382 pcmrec_close_file(&rec_fdata
.rec_file
);
1383 rec_fdata
.rec_file
= -1;
1385 is_recording
= false;
1387 dma_lock
= pre_record_ticks
== 0;
1391 logf("not recording");
1394 logf("pcmrec_stop done");
1398 static void pcmrec_pause(void)
1400 logf("pcmrec_pause");
1404 logf("not recording");
1408 logf("already paused");
1416 logf("pcmrec_pause done");
1417 } /* pcmrec_pause */
1420 static void pcmrec_resume(void)
1422 logf("pcmrec_resume");
1426 logf("not recording");
1428 else if (!is_paused
)
1435 is_recording
= true;
1439 logf("pcmrec_resume done");
1440 } /* pcmrec_resume */
1442 static void pcmrec_thread(void) __attribute__((noreturn
));
1443 static void pcmrec_thread(void)
1445 struct queue_event ev
;
1447 logf("thread pcmrec start");
1453 /* Poll periodically to flush data */
1454 queue_wait_w_tmo(&pcmrec_queue
, &ev
, HZ
/5);
1456 if (ev
.id
== SYS_TIMEOUT
)
1458 /* Messages that interrupt this will complete it */
1459 pcmrec_flush(PCMREC_FLUSH_IF_HIGH
|
1460 PCMREC_FLUSH_INTERRUPTABLE
);
1466 /* Not doing anything - sit and wait for commands */
1467 queue_wait(&pcmrec_queue
, &ev
);
1480 case PCMREC_OPTIONS
:
1481 pcmrec_set_recording_options(
1482 (struct audio_recording_options
*)ev
.data
);
1486 clear_flush_interrupt();
1487 pcmrec_record((const char *)ev
.data
);
1491 clear_flush_interrupt();
1496 clear_flush_interrupt();
1504 case PCMREC_FLUSH_NUM
:
1505 pcmrec_flush((unsigned)ev
.data
);
1508 case SYS_USB_CONNECTED
:
1512 usb_acknowledge(SYS_USB_CONNECTED_ACK
);
1513 usb_wait_for_disconnect(&pcmrec_queue
);
1514 flush_interrupts
= 0;
1518 } /* pcmrec_thread */
1520 /****************************************************************************/
1522 /* following functions will be called by the encoder codec */
1523 /* in a free-threaded manner */
1525 /****************************************************************************/
1527 /* pass the encoder settings to the encoder */
1528 void enc_get_inputs(struct enc_inputs
*inputs
)
1530 inputs
->sample_rate
= sample_rate
;
1531 inputs
->num_channels
= num_channels
;
1532 inputs
->rec_mono_mode
= rec_mono_mode
;
1533 inputs
->config
= &enc_config
;
1534 } /* enc_get_inputs */
1536 /* set the encoder dimensions (called by encoder codec at initialization and
1538 void enc_set_parameters(struct enc_parameters
*params
)
1540 size_t bufsize
, resbytes
;
1542 logf("enc_set_parameters");
1547 /* Encoder is terminating */
1548 memset(&enc_config
, 0, sizeof (enc_config
));
1549 enc_sample_rate
= 0;
1550 cancel_cpu_boost(); /* Make sure no boost remains */
1554 enc_sample_rate
= params
->enc_sample_rate
;
1555 logf("enc sampr:%lu", enc_sample_rate
);
1557 pcm_rd_pos
= dma_wr_pos
;
1558 pcm_enc_pos
= pcm_rd_pos
;
1560 enc_config
.afmt
= params
->afmt
;
1561 /* addition of the header is always implied - chunk size 4-byte aligned */
1563 ALIGN_UP_P2(ENC_CHUNK_HDR_SIZE
+ params
->chunk_size
, 2);
1564 enc_events_callback
= params
->events_callback
;
1566 logf("chunk size:%lu", enc_chunk_size
);
1568 /*** Configure the buffers ***/
1570 /* Layout of recording buffer:
1571 * [ax] = possible alignment x multiple
1572 * [sx] = possible size alignment of x multiple
1573 * |[a16]|[s4]:PCM Buffer+PCM Guard|[s4 each]:Encoder Chunks|->
1574 * |[[s4]:Reserved Bytes]|Filename Queue->|[space]|
1576 resbytes
= ALIGN_UP_P2(params
->reserve_bytes
, 2);
1577 logf("resbytes:%lu", resbytes
);
1579 bufsize
= rec_buffer_size
- (enc_buffer
- pcm_buffer
) -
1580 resbytes
- FNQ_MIN_NUM_PATHS
*MAX_PATH
1582 - sizeof (*wrap_id_p
)
1586 enc_num_chunks
= bufsize
/ enc_chunk_size
;
1587 logf("num chunks:%d", enc_num_chunks
);
1589 /* get real amount used by encoder chunks */
1590 bufsize
= enc_num_chunks
*enc_chunk_size
;
1591 logf("enc size:%lu", bufsize
);
1594 /* add magic at wraparound for spillover checks */
1595 wrap_id_p
= SKIPBYTES((unsigned long *)enc_buffer
, bufsize
);
1596 bufsize
+= sizeof (*wrap_id_p
);
1597 *wrap_id_p
= ENC_CHUNK_MAGIC
;
1600 /** set OUT parameters **/
1601 params
->enc_buffer
= enc_buffer
;
1602 params
->buf_chunk_size
= enc_chunk_size
;
1603 params
->num_chunks
= enc_num_chunks
;
1605 /* calculate reserve buffer start and return pointer to encoder */
1606 params
->reserve_buffer
= NULL
;
1609 params
->reserve_buffer
= enc_buffer
+ bufsize
;
1610 bufsize
+= resbytes
;
1613 /* place filename queue at end of buffer using up whatever remains */
1614 fnq_rd_pos
= 0; /* reset */
1615 fnq_wr_pos
= 0; /* reset */
1616 fn_queue
= enc_buffer
+ bufsize
;
1617 fnq_size
= pcm_buffer
+ rec_buffer_size
- fn_queue
;
1618 fnq_size
/= MAX_PATH
;
1619 if (fnq_size
> FNQ_MAX_NUM_PATHS
)
1620 fnq_size
= FNQ_MAX_NUM_PATHS
;
1621 fnq_size
*= MAX_PATH
;
1622 logf("fnq files:%ld", fnq_size
/ MAX_PATH
);
1625 logf("ab :%08lX", (uintptr_t)audiobuf
);
1626 logf("pcm:%08lX", (uintptr_t)pcm_buffer
);
1627 logf("enc:%08lX", (uintptr_t)enc_buffer
);
1628 logf("res:%08lX", (uintptr_t)params
->reserve_buffer
);
1629 logf("wip:%08lX", (uintptr_t)wrap_id_p
);
1630 logf("fnq:%08lX", (uintptr_t)fn_queue
);
1631 logf("end:%08lX", (uintptr_t)fn_queue
+ fnq_size
);
1632 logf("abe:%08lX", (uintptr_t)audiobufend
);
1635 /* init all chunk headers and reset indexes */
1637 for (enc_wr_index
= enc_num_chunks
; enc_wr_index
> 0; )
1639 struct enc_chunk_hdr
*chunk
= GET_ENC_CHUNK(--enc_wr_index
);
1641 chunk
->id
= ENC_CHUNK_MAGIC
;
1646 logf("enc_set_parameters done");
1647 } /* enc_set_parameters */
1649 /* return encoder chunk at current write position -
1650 NOTE: can be called by pcmrec thread when splitting streams */
1651 struct enc_chunk_hdr
* enc_get_chunk(void)
1653 struct enc_chunk_hdr
*chunk
= GET_ENC_CHUNK(enc_wr_index
);
1656 if (chunk
->id
!= ENC_CHUNK_MAGIC
|| *wrap_id_p
!= ENC_CHUNK_MAGIC
)
1658 errors
|= PCMREC_E_CHUNK_OVF
;
1659 logf("finish chk ovf: %d", enc_wr_index
);
1663 chunk
->flags
&= CHUNKF_START_FILE
;
1666 chunk
->flags
|= CHUNKF_PRERECORD
;
1669 } /* enc_get_chunk */
1671 /* releases the current chunk into the available chunks -
1672 NOTE: can be called by pcmrec thread when splitting streams */
1673 void enc_finish_chunk(void)
1675 struct enc_chunk_hdr
*chunk
= GET_ENC_CHUNK(enc_wr_index
);
1677 if ((long)chunk
->flags
< 0)
1679 /* encoder set error flag */
1680 errors
|= PCMREC_E_ENCODER
;
1681 logf("finish chk enc error");
1684 /* advance enc_wr_index to the next encoder chunk */
1685 INC_ENC_INDEX(enc_wr_index
);
1687 if (enc_rd_index
!= enc_wr_index
)
1689 num_rec_bytes
+= chunk
->enc_size
;
1690 num_rec_samples
+= chunk
->num_pcm
;
1692 accum_rec_bytes
+= chunk
->enc_size
;
1693 accum_pcm_samples
+= chunk
->num_pcm
;
1696 else if (is_recording
) /* buffer full */
1698 /* keep current position and put up warning flag */
1699 warnings
|= PCMREC_W_ENC_BUFFER_OVF
;
1700 logf("enc_buffer ovf");
1701 DEC_ENC_INDEX(enc_wr_index
);
1704 /* if stream splitting, keep this out of circulation and
1705 flush a small number, then readd - cannot risk losing
1708 pcmrec_flush(PCMREC_FLUSH_MINI
);
1709 INC_ENC_INDEX(enc_wr_index
);
1714 /* advance enc_rd_index for prerecording */
1715 INC_ENC_INDEX(enc_rd_index
);
1717 } /* enc_finish_chunk */
1719 /* passes a pointer to next chunk of unprocessed wav data */
1720 /* TODO: this really should give the actual size returned */
1721 unsigned char * enc_get_pcm_data(size_t size
)
1723 int wp
= dma_wr_pos
;
1724 size_t avail
= (wp
- pcm_rd_pos
) & PCM_CHUNK_MASK
;
1726 /* limit the requested pcm data size */
1727 if (size
> PCM_MAX_FEED_SIZE
)
1728 size
= PCM_MAX_FEED_SIZE
;
1732 unsigned char *ptr
= pcm_buffer
+ pcm_rd_pos
;
1733 int next_pos
= (pcm_rd_pos
+ size
) & PCM_CHUNK_MASK
;
1735 pcm_enc_pos
= pcm_rd_pos
;
1736 pcm_rd_pos
= next_pos
;
1738 /* ptr must point to continous data at wraparound position */
1739 if ((size_t)pcm_rd_pos
< size
)
1741 memcpy(pcm_buffer
+ PCM_NUM_CHUNKS
*PCM_CHUNK_SIZE
,
1742 pcm_buffer
, pcm_rd_pos
);
1745 if (avail
>= (sample_rate
<< 2))
1747 /* Filling up - boost codec */
1748 trigger_cpu_boost();
1751 pcm_buffer_empty
= false;
1755 /* not enough data available - encoder should idle */
1756 pcm_buffer_empty
= true;
1760 /* Sleep long enough to allow one frame on average */
1764 } /* enc_get_pcm_data */
1766 /* puts some pcm data back in the queue */
1767 size_t enc_unget_pcm_data(size_t size
)
1769 int wp
= dma_wr_pos
;
1770 size_t old_avail
= ((pcm_rd_pos
- wp
) & PCM_CHUNK_MASK
) -
1773 /* allow one interrupt to occur during this call and not have the
1774 new read position inside the DMA destination chunk */
1775 if ((ssize_t
)old_avail
> 0)
1777 /* limit size to amount of old data remaining */
1778 if (size
> old_avail
)
1781 pcm_enc_pos
= (pcm_rd_pos
- size
) & PCM_CHUNK_MASK
;
1782 pcm_rd_pos
= pcm_enc_pos
;
1788 } /* enc_unget_pcm_data */