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 unsigned int codec_thread_id
;
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 **/
131 #define PCM_NUM_CHUNKS 16 /* Power of 2 */
133 #define PCM_NUM_CHUNKS 256 /* Power of 2 */
135 #define PCM_CHUNK_SIZE 8192 /* Power of 2 */
136 #define PCM_CHUNK_MASK (PCM_NUM_CHUNKS*PCM_CHUNK_SIZE - 1)
138 #define GET_PCM_CHUNK(offset) ((long *)(pcm_buffer + (offset)))
139 #define GET_ENC_CHUNK(index) ENC_CHUNK_HDR(enc_buffer + enc_chunk_size*(index))
140 #define INC_ENC_INDEX(index) \
141 { if (++index >= enc_num_chunks) index = 0; }
142 #define DEC_ENC_INDEX(index) \
143 { if (--index < 0) index = enc_num_chunks - 1; }
145 static size_t rec_buffer_size
; /* size of available buffer */
146 static unsigned char *pcm_buffer
; /* circular recording buffer */
147 static unsigned char *enc_buffer
; /* circular encoding buffer */
149 static unsigned long *wrap_id_p
; /* magic at wrap position - a debugging
150 aid to check if the encoder data
151 spilled out of its chunk */
153 static volatile int dma_wr_pos
; /* current DMA write pos */
154 static int pcm_rd_pos
; /* current PCM read pos */
155 static int pcm_enc_pos
; /* position encoder is processing */
156 static volatile bool dma_lock
; /* lock DMA write position */
157 static int enc_wr_index
; /* encoder chunk write index */
158 static int enc_rd_index
; /* encoder chunk read index */
159 static int enc_num_chunks
; /* number of chunks in ringbuffer */
160 static size_t enc_chunk_size
; /* maximum encoder chunk size */
161 static unsigned long enc_sample_rate
; /* sample rate used by encoder */
162 static bool pcmrec_context
= false; /* called by pcmrec thread? */
163 static bool pcm_buffer_empty
; /* all pcm chunks processed? */
165 /** file flushing **/
166 static int low_watermark
; /* Low watermark to stop flush */
167 static int high_watermark
; /* max chunk limit for data flush */
168 static unsigned long spinup_time
= 35*HZ
/10; /* Fudged spinup time */
169 static int last_storage_spinup_time
= -1;/* previous spin time used */
170 #ifdef HAVE_PRIORITY_SCHEDULING
171 static int flood_watermark
; /* boost thread priority when here */
174 /* Constants that control watermarks */
175 #define MINI_CHUNKS 10 /* chunk count for mini flush */
176 #ifdef HAVE_PRIORITY_SCHEDULING
177 #define PRIO_SECONDS 10 /* max flush time before priority boost */
180 /* fractions must be integer fractions of 4 because they are evaluated with
181 * X*4*XXX_SECONDS, that way we avoid float calculation */
182 #define LOW_SECONDS 1/4 /* low watermark time till empty */
183 #define PANIC_SECONDS 1/2 /* flood watermark time until full */
184 #define FLUSH_SECONDS 1 /* flush watermark time until full */
186 #define LOW_SECONDS 1 /* low watermark time till empty */
187 #define PANIC_SECONDS 5 /* flood watermark time until full */
188 #define FLUSH_SECONDS 7 /* flush watermark time until full */
190 #define LOW_SECONDS 1 /* low watermark time till empty */
191 #define PANIC_SECONDS 8
192 #define FLUSH_SECONDS 10
195 /** encoder events **/
196 static void (*enc_events_callback
)(enum enc_events event
, void *data
);
198 /** Path queue for files to write **/
199 #define FNQ_MIN_NUM_PATHS 16 /* minimum number of paths to hold */
200 #define FNQ_MAX_NUM_PATHS 64 /* maximum number of paths to hold */
201 static unsigned char *fn_queue
; /* pointer to first filename */
202 static ssize_t fnq_size
; /* capacity of queue in bytes */
203 static int fnq_rd_pos
; /* current read position */
204 static int fnq_wr_pos
; /* current write position */
205 #define FNQ_NEXT(pos) \
206 ({ int p = (pos) + MAX_PATH; \
210 #define FNQ_PREV(pos) \
211 ({ int p = (pos) - MAX_PATH; \
213 p = fnq_size - MAX_PATH; \
218 PCMREC_FLUSH_INTERRUPTABLE
= 0x8000000, /* Flush can be interrupted by
219 incoming messages - combine
220 with other constants */
221 PCMREC_FLUSH_ALL
= 0x7ffffff, /* Flush all files */
222 PCMREC_FLUSH_MINI
= 0x7fffffe, /* Flush a small number of
224 PCMREC_FLUSH_IF_HIGH
= 0x0000000, /* Flush if high watermark
228 /***************************************************************************/
230 static struct event_queue pcmrec_queue SHAREDBSS_ATTR
;
231 static struct queue_sender_list pcmrec_queue_send SHAREDBSS_ATTR
;
232 static long pcmrec_stack
[3*DEFAULT_STACK_SIZE
/sizeof(long)];
233 static const char pcmrec_thread_name
[] = "pcmrec";
234 static unsigned int pcmrec_thread_id
= 0;
236 static void pcmrec_thread(void);
241 PCMREC_INIT
, /* enable recording */
242 PCMREC_CLOSE
, /* close recording */
243 PCMREC_OPTIONS
, /* set recording options */
244 PCMREC_RECORD
, /* record a new file */
245 PCMREC_STOP
, /* stop the current recording */
246 PCMREC_PAUSE
, /* pause the current recording */
247 PCMREC_RESUME
, /* resume the current recording */
249 PCMREC_FLUSH_NUM
, /* flush a number of files out */
253 /*******************************************************************/
254 /* Functions that are not executing in the pcmrec_thread first */
255 /*******************************************************************/
257 /* Callback for when more data is ready - called in interrupt context */
258 static int pcm_rec_have_more(int status
)
262 /* some error condition */
263 if (status
== DMA_REC_ERROR_DMA
)
265 /* Flush recorded data to disk and stop recording */
266 queue_post(&pcmrec_queue
, PCMREC_STOP
, 0);
269 /* else try again next transmission */
273 /* advance write position */
274 int next_pos
= (dma_wr_pos
+ PCM_CHUNK_SIZE
) & PCM_CHUNK_MASK
;
276 /* set pcm ovf if processing start position is inside current
278 if ((unsigned)(pcm_enc_pos
- next_pos
) < PCM_CHUNK_SIZE
)
279 warnings
|= PCMREC_W_PCM_BUFFER_OVF
;
281 dma_wr_pos
= next_pos
;
284 pcm_record_more(GET_PCM_CHUNK(dma_wr_pos
), PCM_CHUNK_SIZE
);
286 } /* pcm_rec_have_more */
288 static void reset_hardware(void)
290 /* reset pcm to defaults (playback only) */
291 pcm_set_frequency(HW_SAMPR_DEFAULT
);
292 audio_set_output_source(AUDIO_SRC_PLAYBACK
);
293 pcm_apply_settings();
296 /** pcm_rec_* group **/
299 * Clear all errors and warnings
301 void pcm_rec_error_clear(void)
303 errors
= warnings
= 0;
304 } /* pcm_rec_error_clear */
307 * Check mode, errors and warnings
309 unsigned long pcm_rec_status(void)
311 unsigned long ret
= 0;
314 ret
|= AUDIO_STATUS_RECORD
;
315 else if (pre_record_ticks
)
316 ret
|= AUDIO_STATUS_PRERECORD
;
319 ret
|= AUDIO_STATUS_PAUSE
;
322 ret
|= AUDIO_STATUS_ERROR
;
325 ret
|= AUDIO_STATUS_WARNING
;
328 } /* pcm_rec_status */
331 * Return warnings that have occured since recording started
333 unsigned long pcm_rec_get_warnings(void)
339 int pcm_rec_current_bitrate(void)
341 if (accum_pcm_samples
== 0)
344 return (int)(8*accum_rec_bytes
*enc_sample_rate
/ (1000*accum_pcm_samples
));
345 } /* pcm_rec_current_bitrate */
349 int pcm_rec_encoder_afmt(void)
351 return enc_config
.afmt
;
352 } /* pcm_rec_encoder_afmt */
356 int pcm_rec_rec_format(void)
358 return afmt_rec_format
[enc_config
.afmt
];
359 } /* pcm_rec_rec_format */
363 unsigned long pcm_rec_sample_rate(void)
365 /* Which is better ?? */
367 return enc_sample_rate
;
370 } /* audio_get_sample_rate */
374 * Creates pcmrec_thread
376 void pcm_rec_init(void)
378 queue_init(&pcmrec_queue
, true);
380 create_thread(pcmrec_thread
, pcmrec_stack
, sizeof(pcmrec_stack
),
381 0, pcmrec_thread_name
IF_PRIO(, PRIORITY_RECORDING
)
383 queue_enable_queue_send(&pcmrec_queue
, &pcmrec_queue_send
,
387 /** audio_* group **/
390 * Initializes recording - call before calling any other recording function
392 void audio_init_recording(unsigned int buffer_offset
)
394 logf("audio_init_recording");
395 queue_send(&pcmrec_queue
, PCMREC_INIT
, 0);
396 logf("audio_init_recording done");
398 } /* audio_init_recording */
401 * Closes recording - call audio_stop_recording first
403 void audio_close_recording(void)
405 logf("audio_close_recording");
406 queue_send(&pcmrec_queue
, PCMREC_CLOSE
, 0);
407 logf("audio_close_recording done");
408 } /* audio_close_recording */
411 * Sets recording parameters
413 void audio_set_recording_options(struct audio_recording_options
*options
)
415 logf("audio_set_recording_options");
416 queue_send(&pcmrec_queue
, PCMREC_OPTIONS
, (intptr_t)options
);
417 logf("audio_set_recording_options done");
418 } /* audio_set_recording_options */
421 * Start recording if not recording or else split
423 void audio_record(const char *filename
)
425 logf("audio_record: %s", filename
);
427 queue_send(&pcmrec_queue
, PCMREC_RECORD
, (intptr_t)filename
);
428 logf("audio_record_done");
432 * audio_record wrapper for API compatibility with HW codec
434 void audio_new_file(const char *filename
)
436 audio_record(filename
);
437 } /* audio_new_file */
440 * Stop current recording if recording
442 void audio_stop_recording(void)
444 logf("audio_stop_recording");
446 queue_post(&pcmrec_queue
, PCMREC_STOP
, 0);
447 logf("audio_stop_recording done");
448 } /* audio_stop_recording */
451 * Pause current recording
453 void audio_pause_recording(void)
455 logf("audio_pause_recording");
457 queue_post(&pcmrec_queue
, PCMREC_PAUSE
, 0);
458 logf("audio_pause_recording done");
459 } /* audio_pause_recording */
462 * Resume current recording if paused
464 void audio_resume_recording(void)
466 logf("audio_resume_recording");
467 queue_post(&pcmrec_queue
, PCMREC_RESUME
, 0);
468 logf("audio_resume_recording done");
469 } /* audio_resume_recording */
472 * Note that microphone is mono, only left value is used
473 * See audiohw_set_recvol() for exact ranges.
475 * @param type AUDIO_GAIN_MIC, AUDIO_GAIN_LINEIN
478 void audio_set_recording_gain(int left
, int right
, int type
)
480 //logf("rcmrec: t=%d l=%d r=%d", type, left, right);
481 audiohw_set_recvol(left
, right
, type
);
482 } /* audio_set_recording_gain */
484 /** Information about current state **/
487 * Return current recorded time in ticks (playback eqivalent time)
489 unsigned long audio_recorded_time(void)
491 if (!is_recording
|| enc_sample_rate
== 0)
494 /* return actual recorded time a la encoded data even if encoder rate
495 doesn't match the pcm rate */
496 return (long)(HZ
*(unsigned long long)num_rec_samples
/ enc_sample_rate
);
497 } /* audio_recorded_time */
500 * Return number of bytes encoded to output
502 unsigned long audio_num_recorded_bytes(void)
507 return num_rec_bytes
;
508 } /* audio_num_recorded_bytes */
510 /***************************************************************************/
512 /* Functions that execute in the context of pcmrec_thread */
514 /***************************************************************************/
516 /** Filename Queue **/
518 /* returns true if the queue is empty */
519 static inline bool pcmrec_fnq_is_empty(void)
521 return fnq_rd_pos
== fnq_wr_pos
;
522 } /* pcmrec_fnq_is_empty */
524 /* empties the filename queue */
525 static inline void pcmrec_fnq_set_empty(void)
527 fnq_rd_pos
= fnq_wr_pos
;
528 } /* pcmrec_fnq_set_empty */
530 /* returns true if the queue is full */
531 static bool pcmrec_fnq_is_full(void)
533 ssize_t size
= fnq_wr_pos
- fnq_rd_pos
;
537 return size
>= fnq_size
- MAX_PATH
;
538 } /* pcmrec_fnq_is_full */
540 /* queue another filename - will overwrite oldest one if full */
541 static bool pcmrec_fnq_add_filename(const char *filename
)
543 strlcpy(fn_queue
+ fnq_wr_pos
, filename
, MAX_PATH
);
544 fnq_wr_pos
= FNQ_NEXT(fnq_wr_pos
);
546 if (fnq_rd_pos
!= fnq_wr_pos
)
550 fnq_rd_pos
= FNQ_NEXT(fnq_rd_pos
);
552 } /* pcmrec_fnq_add_filename */
554 /* replace the last filename added */
555 static bool pcmrec_fnq_replace_tail(const char *filename
)
559 if (pcmrec_fnq_is_empty())
562 pos
= FNQ_PREV(fnq_wr_pos
);
564 strlcpy(fn_queue
+ pos
, filename
, MAX_PATH
);
567 } /* pcmrec_fnq_replace_tail */
569 /* pulls the next filename from the queue */
570 static bool pcmrec_fnq_get_filename(char *filename
)
572 if (pcmrec_fnq_is_empty())
576 strlcpy(filename
, fn_queue
+ fnq_rd_pos
, MAX_PATH
);
578 fnq_rd_pos
= FNQ_NEXT(fnq_rd_pos
);
580 } /* pcmrec_fnq_get_filename */
582 /* close the file number pointed to by fd_p */
583 static void pcmrec_close_file(int *fd_p
)
586 return; /* preserve error */
588 if (close(*fd_p
) != 0)
589 errors
|= PCMREC_E_IO
;
592 } /* pcmrec_close_file */
594 /** Data Flushing **/
597 * called after callback to update sizes if codec changed the amount of data
600 static inline void pcmrec_update_sizes_inl(size_t prev_enc_size
,
601 unsigned long prev_num_pcm
)
603 if (rec_fdata
.new_enc_size
!= prev_enc_size
)
605 ssize_t size_diff
= rec_fdata
.new_enc_size
- prev_enc_size
;
606 num_rec_bytes
+= size_diff
;
608 accum_rec_bytes
+= size_diff
;
612 if (rec_fdata
.new_num_pcm
!= prev_num_pcm
)
614 unsigned long pcm_diff
= rec_fdata
.new_num_pcm
- prev_num_pcm
;
615 num_rec_samples
+= pcm_diff
;
617 accum_pcm_samples
+= pcm_diff
;
620 } /* pcmrec_update_sizes_inl */
622 /* don't need to inline every instance */
623 static void pcmrec_update_sizes(size_t prev_enc_size
,
624 unsigned long prev_num_pcm
)
626 pcmrec_update_sizes_inl(prev_enc_size
, prev_num_pcm
);
627 } /* pcmrec_update_sizes */
629 static void pcmrec_start_file(void)
631 size_t enc_size
= rec_fdata
.new_enc_size
;
632 unsigned long num_pcm
= rec_fdata
.new_num_pcm
;
633 int curr_rec_file
= rec_fdata
.rec_file
;
634 char filename
[MAX_PATH
];
636 /* must always pull the filename that matches with this queue */
637 if (!pcmrec_fnq_get_filename(filename
))
639 logf("start file: fnq empty");
641 errors
|= PCMREC_E_FNQ_DESYNC
;
643 else if (errors
!= 0)
645 logf("start file: error already");
647 else if (curr_rec_file
>= 0)
649 /* Any previous file should have been closed */
650 logf("start file: file already open");
651 errors
|= PCMREC_E_FNQ_DESYNC
;
655 rec_fdata
.chunk
->flags
|= CHUNKF_ERROR
;
657 /* encoder can set error flag here and should increase
658 enc_new_size and pcm_new_size to reflect additional
659 data written if any */
660 rec_fdata
.filename
= filename
;
661 enc_events_callback(ENC_START_FILE
, &rec_fdata
);
663 if (errors
== 0 && (rec_fdata
.chunk
->flags
& CHUNKF_ERROR
))
665 logf("start file: enc error");
666 errors
|= PCMREC_E_ENCODER
;
671 pcmrec_close_file(&curr_rec_file
);
672 /* Write no more to this file */
673 rec_fdata
.chunk
->flags
|= CHUNKF_END_FILE
;
677 pcmrec_update_sizes(enc_size
, num_pcm
);
680 rec_fdata
.chunk
->flags
&= ~CHUNKF_START_FILE
;
681 } /* pcmrec_start_file */
683 static inline void pcmrec_write_chunk(void)
685 size_t enc_size
= rec_fdata
.new_enc_size
;
686 unsigned long num_pcm
= rec_fdata
.new_num_pcm
;
689 rec_fdata
.chunk
->flags
|= CHUNKF_ERROR
;
691 enc_events_callback(ENC_WRITE_CHUNK
, &rec_fdata
);
693 if ((long)rec_fdata
.chunk
->flags
>= 0)
695 pcmrec_update_sizes_inl(enc_size
, num_pcm
);
697 else if (errors
== 0)
699 logf("wr chk enc error %lu %lu",
700 rec_fdata
.chunk
->enc_size
, rec_fdata
.chunk
->num_pcm
);
701 errors
|= PCMREC_E_ENCODER
;
703 } /* pcmrec_write_chunk */
705 static void pcmrec_end_file(void)
707 /* all data in output buffer for current file will have been
708 written and encoder can now do any nescessary steps to
709 finalize the written file */
710 size_t enc_size
= rec_fdata
.new_enc_size
;
711 unsigned long num_pcm
= rec_fdata
.new_num_pcm
;
713 enc_events_callback(ENC_END_FILE
, &rec_fdata
);
717 if (rec_fdata
.chunk
->flags
& CHUNKF_ERROR
)
719 logf("end file: enc error");
720 errors
|= PCMREC_E_ENCODER
;
724 pcmrec_update_sizes(enc_size
, num_pcm
);
728 /* Force file close if error */
730 pcmrec_close_file(&rec_fdata
.rec_file
);
732 rec_fdata
.chunk
->flags
&= ~CHUNKF_END_FILE
;
733 } /* pcmrec_end_file */
736 * Update buffer watermarks with spinup time compensation
738 * All this assumes reasonable data rates, chunk sizes and sufficient
739 * memory for the most part. Some dumb checks are included but perhaps
740 * are pointless since this all will break down at extreme limits that
741 * are currently not applicable to any supported device.
743 static void pcmrec_refresh_watermarks(void)
745 logf("ata spinup: %d", storage_spinup_time());
747 /* set the low mark for when flushing stops if automatic */
748 /* don't change the order in this expression, LOW_SECONDS can be an
749 * integer fraction of 4 */
750 low_watermark
= (sample_rate
*4*LOW_SECONDS
+ (enc_chunk_size
-1))
752 logf("low wmk: %d", low_watermark
);
754 #ifdef HAVE_PRIORITY_SCHEDULING
755 /* panic boost thread priority if 2 seconds of ground is lost -
756 this allows encoder to boost with just under a second of
757 pcm data (if not yet full enough to boost itself)
758 and not falsely trip the alarm. */
759 /* don't change the order in this expression, PANIC_SECONDS can be an
760 * integer fraction of 4 */
761 flood_watermark
= enc_num_chunks
-
762 (sample_rate
*4*PANIC_SECONDS
+ (enc_chunk_size
-1))
765 if (flood_watermark
< low_watermark
)
767 logf("warning: panic < low");
768 flood_watermark
= low_watermark
;
771 logf("flood at: %d", flood_watermark
);
773 spinup_time
= last_storage_spinup_time
= storage_spinup_time();
774 #if (CONFIG_STORAGE & STORAGE_ATA)
775 /* write at 8s + st remaining in enc_buffer - range 12s to
776 20s total - default to 3.5s spinup. */
777 if (spinup_time
== 0)
778 spinup_time
= 35*HZ
/10; /* default - cozy */
779 else if (spinup_time
< 2*HZ
)
780 spinup_time
= 2*HZ
; /* ludicrous - ramdisk? */
781 else if (spinup_time
> 10*HZ
)
782 spinup_time
= 10*HZ
; /* do you have a functioning HD? */
785 /* try to start writing with 10s remaining after disk spinup */
786 high_watermark
= enc_num_chunks
-
787 ((FLUSH_SECONDS
*HZ
+ spinup_time
)*4*sample_rate
+
788 (enc_chunk_size
-1)*HZ
) / (enc_chunk_size
*HZ
);
790 if (high_watermark
< low_watermark
)
792 logf("warning: low 'write at' (%d)", high_watermark
);
793 high_watermark
= low_watermark
;
797 logf("write at: %d", high_watermark
);
798 } /* pcmrec_refresh_watermarks */
803 * This function is called when queue_get_w_tmo times out.
805 * Set flush_num to the number of files to flush to disk or to
806 * a PCMREC_FLUSH_* constant.
808 static void pcmrec_flush(unsigned flush_num
)
810 #ifdef HAVE_PRIORITY_SCHEDULING
811 static unsigned long last_flush_tick
; /* tick when function returned */
812 unsigned long start_tick
; /* When flush started */
813 unsigned long prio_tick
; /* Timeout for auto boost */
814 int prio_pcmrec
; /* Current thread priority for pcmrec */
815 int prio_codec
; /* Current thread priority for codec */
817 int num_ready
; /* Number of chunks ready at start */
818 unsigned remaining
; /* Number of file starts remaining */
819 unsigned chunks_flushed
; /* Chunks flushed (for mini flush only) */
820 bool interruptable
; /* Flush can be interupted */
822 num_ready
= enc_wr_index
- enc_rd_index
;
824 num_ready
+= enc_num_chunks
;
826 /* save interruptable flag and remove it to get the actual count */
827 interruptable
= (flush_num
& PCMREC_FLUSH_INTERRUPTABLE
) != 0;
828 flush_num
&= ~PCMREC_FLUSH_INTERRUPTABLE
;
835 if (storage_spinup_time() != last_storage_spinup_time
)
836 pcmrec_refresh_watermarks();
838 /* enough available? no? then leave */
839 if (num_ready
< high_watermark
)
841 } /* endif (flush_num == 0) */
843 #ifdef HAVE_PRIORITY_SCHEDULING
844 start_tick
= current_tick
;
845 prio_tick
= start_tick
+ PRIO_SECONDS
*HZ
+ spinup_time
;
847 if (flush_num
== 0 && TIME_BEFORE(current_tick
, last_flush_tick
+ HZ
/2))
849 /* if we're getting called too much and this isn't forced,
850 boost stat by expiring timeout in advance */
851 logf("too frequent flush");
852 prio_tick
= current_tick
- 1;
856 prio_codec
= -1; /* GCC is too stoopid to figure out it doesn't
860 logf("writing:%d(%d):%s%s", num_ready
, flush_num
,
861 interruptable
? "i" : "",
862 flush_num
== PCMREC_FLUSH_MINI
? "m" : "");
866 remaining
= flush_num
;
869 while (num_ready
> 0)
871 /* check current number of encoder chunks */
872 int num
= enc_wr_index
- enc_rd_index
;
874 num
+= enc_num_chunks
;
876 if (num
<= low_watermark
&&
877 (flush_num
== PCMREC_FLUSH_IF_HIGH
|| num
<= 0))
879 logf("low data: %d", num
);
880 break; /* data remaining is below threshold */
883 if (interruptable
&& flush_interrupts
> 0)
885 logf("int at: %d", num
);
886 break; /* interrupted */
889 #ifdef HAVE_PRIORITY_SCHEDULING
890 if (prio_pcmrec
== -1 && (num
>= flood_watermark
||
891 TIME_AFTER(current_tick
, prio_tick
)))
893 /* losing ground or holding without progress - boost
894 priority until finished */
895 logf("pcmrec: boost (%s)",
896 num
>= flood_watermark
? "num" : "time");
897 prio_pcmrec
= thread_set_priority(THREAD_ID_CURRENT
,
898 thread_get_priority(THREAD_ID_CURRENT
) - 4);
899 prio_codec
= thread_set_priority(codec_thread_id
,
900 thread_get_priority(codec_thread_id
) - 4);
904 rec_fdata
.chunk
= GET_ENC_CHUNK(enc_rd_index
);
905 rec_fdata
.new_enc_size
= rec_fdata
.chunk
->enc_size
;
906 rec_fdata
.new_num_pcm
= rec_fdata
.chunk
->num_pcm
;
908 if (rec_fdata
.chunk
->flags
& CHUNKF_START_FILE
)
911 if (--remaining
== 0)
912 num_ready
= 0; /* stop on next loop - must write this
913 chunk if it has data */
916 pcmrec_write_chunk();
918 if (rec_fdata
.chunk
->flags
& CHUNKF_END_FILE
)
921 INC_ENC_INDEX(enc_rd_index
);
929 if (flush_num
== PCMREC_FLUSH_MINI
&&
930 ++chunks_flushed
>= MINI_CHUNKS
)
932 logf("mini flush break");
935 /* no yielding; the file apis called in the codecs do that
940 if (rec_fdata
.rec_file
>= 0 && fsync(rec_fdata
.rec_file
) != 0)
941 errors
|= PCMREC_E_IO
;
945 #ifdef HAVE_PRIORITY_SCHEDULING
946 if (prio_pcmrec
!= -1)
948 /* return to original priorities */
949 logf("pcmrec: unboost priority");
950 thread_set_priority(THREAD_ID_CURRENT
, prio_pcmrec
);
951 thread_set_priority(codec_thread_id
, prio_codec
);
954 last_flush_tick
= current_tick
; /* save tick when we left */
961 * Marks a new stream in the buffer and gives the encoder a chance for special
962 * handling of transition from one to the next. The encoder may change the
963 * chunk that ends the old stream by requesting more chunks and similiarly for
964 * the new but must always advance the position though the interface. It can
965 * later reject any data it cares to when writing the file but should mark the
966 * chunk so it can recognize this. ENC_WRITE_CHUNK event must be able to accept
967 * a NULL data pointer without error as well.
969 static int pcmrec_get_chunk_index(struct enc_chunk_hdr
*chunk
)
971 return ((char *)chunk
- (char *)enc_buffer
) / enc_chunk_size
;
972 } /* pcmrec_get_chunk_index */
974 static struct enc_chunk_hdr
* pcmrec_get_prev_chunk(int index
)
976 DEC_ENC_INDEX(index
);
977 return GET_ENC_CHUNK(index
);
978 } /* pcmrec_get_prev_chunk */
980 static void pcmrec_new_stream(const char *filename
, /* next file name */
981 unsigned long flags
, /* CHUNKF_* flags */
982 int pre_index
) /* index for prerecorded data */
984 logf("pcmrec_new_stream");
985 char path
[MAX_PATH
]; /* place to copy filename so sender can be released */
987 struct enc_buffer_event_data data
;
988 bool (*fnq_add_fn
)(const char *) = NULL
; /* function to use to add
990 struct enc_chunk_hdr
*start
= NULL
; /* pointer to starting chunk of
992 bool did_flush
= false; /* did a flush occurr? */
995 strlcpy(path
, filename
, MAX_PATH
);
996 queue_reply(&pcmrec_queue
, 0); /* We have all we need */
998 data
.pre_chunk
= NULL
;
999 data
.chunk
= GET_ENC_CHUNK(enc_wr_index
);
1002 if (flags
& CHUNKF_END_FILE
)
1004 data
.chunk
->flags
&= CHUNKF_START_FILE
| CHUNKF_END_FILE
;
1006 if (data
.chunk
->flags
& CHUNKF_START_FILE
)
1008 /* cannot start and end on same unprocessed chunk */
1009 logf("file end on start");
1010 flags
&= ~CHUNKF_END_FILE
;
1012 else if (enc_rd_index
== enc_wr_index
)
1014 /* all data flushed but file not ended - chunk will be left
1016 logf("end on dead end");
1017 data
.chunk
->flags
= 0;
1018 data
.chunk
->enc_size
= 0;
1019 data
.chunk
->num_pcm
= 0;
1020 data
.chunk
->enc_data
= NULL
;
1021 INC_ENC_INDEX(enc_wr_index
);
1022 data
.chunk
= GET_ENC_CHUNK(enc_wr_index
);
1026 struct enc_chunk_hdr
*last
= pcmrec_get_prev_chunk(enc_wr_index
);
1028 if (last
->flags
& CHUNKF_END_FILE
)
1030 /* end already processed and marked - can't end twice */
1031 logf("file end again");
1032 flags
&= ~CHUNKF_END_FILE
;
1038 if (flags
& CHUNKF_START_FILE
)
1040 bool pre
= flags
& CHUNKF_PRERECORD
;
1044 logf("stream prerecord start");
1045 start
= data
.pre_chunk
= GET_ENC_CHUNK(pre_index
);
1046 start
->flags
&= CHUNKF_START_FILE
| CHUNKF_PRERECORD
;
1050 logf("stream normal start");
1052 start
->flags
&= CHUNKF_START_FILE
;
1055 /* if encoder hasn't yet processed the last start - abort the start
1056 of the previous file queued or else it will be empty and invalid */
1057 if (start
->flags
& CHUNKF_START_FILE
)
1059 logf("replacing fnq tail: %s", filename
);
1060 fnq_add_fn
= pcmrec_fnq_replace_tail
;
1064 logf("adding filename: %s", filename
);
1065 fnq_add_fn
= pcmrec_fnq_add_filename
;
1070 pcmrec_context
= true; /* switch encoder context */
1071 enc_events_callback(ENC_REC_NEW_STREAM
, &data
);
1072 pcmrec_context
= false; /* switch back */
1074 if (flags
& CHUNKF_END_FILE
)
1076 int i
= pcmrec_get_chunk_index(data
.chunk
);
1077 pcmrec_get_prev_chunk(i
)->flags
|= CHUNKF_END_FILE
;
1082 if (!(flags
& CHUNKF_PRERECORD
))
1084 /* get stats on data added to start - sort of a prerecord
1086 int i
= pcmrec_get_chunk_index(data
.chunk
);
1087 struct enc_chunk_hdr
*chunk
= data
.chunk
;
1089 logf("start data: %d %d", i
, enc_wr_index
);
1092 num_rec_samples
= 0;
1094 while (i
!= enc_wr_index
)
1096 num_rec_bytes
+= chunk
->enc_size
;
1097 num_rec_samples
+= chunk
->num_pcm
;
1099 chunk
= GET_ENC_CHUNK(i
);
1102 start
->flags
&= ~CHUNKF_START_FILE
;
1106 start
->flags
|= CHUNKF_START_FILE
;
1108 /* flush all pending files out if full and adding */
1109 if (fnq_add_fn
== pcmrec_fnq_add_filename
&& pcmrec_fnq_is_full())
1112 pcmrec_flush(PCMREC_FLUSH_ALL
);
1119 /* Make sure to complete any interrupted high watermark */
1121 pcmrec_flush(PCMREC_FLUSH_IF_HIGH
);
1122 } /* pcmrec_new_stream */
1124 /** event handlers for pcmrec thread */
1127 static void pcmrec_init(void)
1129 unsigned char *buffer
;
1131 /* warings and errors */
1135 pcmrec_close_file(&rec_fdata
.rec_file
);
1136 rec_fdata
.rec_file
= -1;
1148 /* filename queue */
1154 num_rec_samples
= 0;
1156 accum_rec_bytes
= 0;
1157 accum_pcm_samples
= 0;
1160 pre_record_ticks
= 0;
1162 is_recording
= false;
1165 buffer
= audio_get_recording_buffer(&rec_buffer_size
);
1167 /* Line align pcm_buffer 2^5=32 bytes */
1168 pcm_buffer
= (unsigned char *)ALIGN_UP_P2((uintptr_t)buffer
, 5);
1169 enc_buffer
= pcm_buffer
+ ALIGN_UP_P2(PCM_NUM_CHUNKS
*PCM_CHUNK_SIZE
+
1170 PCM_MAX_FEED_SIZE
, 2);
1171 /* Adjust available buffer for possible align advancement */
1172 rec_buffer_size
-= pcm_buffer
- buffer
;
1174 pcm_init_recording();
1178 static void pcmrec_close(void)
1181 pre_record_ticks
= 0; /* Can't be prerecording any more */
1183 pcm_close_recording();
1185 audio_remove_encoder();
1186 } /* pcmrec_close */
1188 /* PCMREC_OPTIONS */
1189 static void pcmrec_set_recording_options(
1190 struct audio_recording_options
*options
)
1192 /* stop DMA transfer */
1194 pcm_stop_recording();
1196 rec_frequency
= options
->rec_frequency
;
1197 rec_source
= options
->rec_source
;
1198 num_channels
= options
->rec_channels
== 1 ? 1 : 2;
1199 rec_mono_mode
= options
->rec_mono_mode
;
1200 pre_record_ticks
= options
->rec_prerecord_time
* HZ
;
1201 enc_config
= options
->enc_config
;
1202 enc_config
.afmt
= rec_format_afmt
[enc_config
.rec_format
];
1204 #ifdef HAVE_SPDIF_IN
1205 if (rec_source
== AUDIO_SRC_SPDIF
)
1207 /* must measure SPDIF sample rate before configuring codecs */
1208 unsigned long sr
= spdif_measure_frequency();
1209 /* round to master list for SPDIF rate */
1210 int index
= round_value_to_list32(sr
, audio_master_sampr_list
,
1211 SAMPR_NUM_FREQ
, false);
1212 sample_rate
= audio_master_sampr_list
[index
];
1213 /* round to HW playback rates for monitoring */
1214 index
= round_value_to_list32(sr
, hw_freq_sampr
,
1215 HW_NUM_FREQ
, false);
1216 pcm_set_frequency(hw_freq_sampr
[index
]);
1217 /* encoders with a limited number of rates do their own rounding */
1222 /* set sample rate from frequency selection */
1223 sample_rate
= rec_freq_sampr
[rec_frequency
];
1224 pcm_set_frequency(sample_rate
);
1227 /* set monitoring */
1228 audio_set_output_source(rec_source
);
1230 /* apply hardware setting to start monitoring now */
1231 pcm_apply_settings();
1233 queue_reply(&pcmrec_queue
, 0); /* Release sender */
1235 if (audio_load_encoder(enc_config
.afmt
))
1237 /* start DMA transfer */
1238 dma_lock
= pre_record_ticks
== 0;
1239 pcm_record_data(pcm_rec_have_more
, GET_PCM_CHUNK(dma_wr_pos
),
1244 logf("set rec opt: enc load failed");
1245 errors
|= PCMREC_E_LOAD_ENCODER
;
1247 } /* pcmrec_set_recording_options */
1249 /* PCMREC_RECORD - start recording (not gapless)
1250 or split stream (gapless) */
1251 static void pcmrec_record(const char *filename
)
1253 unsigned long pre_sample_ticks
;
1255 unsigned long flags
;
1258 logf("pcmrec_record: %s", filename
);
1262 num_rec_samples
= 0;
1267 accum_rec_bytes
= 0;
1268 accum_pcm_samples
= 0;
1270 warnings
= 0; /* reset warnings */
1272 rd_start
= enc_wr_index
;
1273 pre_sample_ticks
= 0;
1275 pcmrec_refresh_watermarks();
1277 if (pre_record_ticks
)
1280 /* calculate number of available chunks */
1281 unsigned long avail_pre_chunks
= (enc_wr_index
- enc_rd_index
+
1282 enc_num_chunks
) % enc_num_chunks
;
1283 /* overflow at 974 seconds of prerecording at 44.1kHz */
1284 unsigned long pre_record_sample_ticks
=
1285 enc_sample_rate
*pre_record_ticks
;
1286 int pre_chunks
= 0; /* Counter to limit prerecorded time to
1287 prevent flood state at outset */
1289 logf("pre-st: %ld", pre_record_sample_ticks
);
1291 /* Get exact measure of recorded data as number of samples aren't
1292 nescessarily going to be the max for each chunk */
1293 for (; avail_pre_chunks
-- > 0;)
1295 struct enc_chunk_hdr
*chunk
;
1296 unsigned long chunk_sample_ticks
;
1300 chunk
= GET_ENC_CHUNK(i
);
1302 /* must have data to be counted */
1303 if (chunk
->enc_data
== NULL
)
1306 chunk_sample_ticks
= chunk
->num_pcm
*HZ
;
1309 pre_sample_ticks
+= chunk_sample_ticks
;
1310 num_rec_bytes
+= chunk
->enc_size
;
1311 num_rec_samples
+= chunk
->num_pcm
;
1314 /* stop here if enough already */
1315 if (pre_chunks
>= high_watermark
||
1316 pre_sample_ticks
>= pre_record_sample_ticks
)
1318 logf("pre-chks: %d", pre_chunks
);
1324 accum_rec_bytes
= num_rec_bytes
;
1325 accum_pcm_samples
= num_rec_samples
;
1329 enc_rd_index
= rd_start
;
1331 /* filename queue should be empty */
1332 if (!pcmrec_fnq_is_empty())
1334 logf("fnq: not empty!");
1335 pcmrec_fnq_set_empty();
1338 flags
= CHUNKF_START_FILE
;
1339 if (pre_sample_ticks
> 0)
1340 flags
|= CHUNKF_PRERECORD
;
1342 pre_index
= enc_rd_index
;
1346 is_recording
= true;
1350 /* already recording, just split the stream */
1351 logf("inserting split");
1352 flags
= CHUNKF_START_FILE
| CHUNKF_END_FILE
;
1356 pcmrec_new_stream(filename
, flags
, pre_index
);
1357 logf("pcmrec_record done");
1358 } /* pcmrec_record */
1361 static void pcmrec_stop(void)
1363 logf("pcmrec_stop");
1367 dma_lock
= true; /* lock dma write position */
1369 /* flush all available data first to avoid overflow while waiting
1370 for encoding to finish */
1371 pcmrec_flush(PCMREC_FLUSH_ALL
);
1373 /* wait for encoder to finish remaining data */
1374 while (errors
== 0 && !pcm_buffer_empty
)
1377 /* end stream at last data */
1378 pcmrec_new_stream(NULL
, CHUNKF_END_FILE
, 0);
1380 /* flush anything else encoder added */
1381 pcmrec_flush(PCMREC_FLUSH_ALL
);
1383 /* remove any pending file start not yet processed - should be at
1384 most one at enc_wr_index */
1385 pcmrec_fnq_get_filename(NULL
);
1386 /* encoder should abort any chunk it was in midst of processing */
1387 GET_ENC_CHUNK(enc_wr_index
)->flags
= CHUNKF_ABORT
;
1389 /* filename queue should be empty */
1390 if (!pcmrec_fnq_is_empty())
1392 logf("fnq: not empty!");
1393 pcmrec_fnq_set_empty();
1396 /* be absolutely sure the file is closed */
1398 pcmrec_close_file(&rec_fdata
.rec_file
);
1399 rec_fdata
.rec_file
= -1;
1401 is_recording
= false;
1403 dma_lock
= pre_record_ticks
== 0;
1407 logf("not recording");
1410 logf("pcmrec_stop done");
1414 static void pcmrec_pause(void)
1416 logf("pcmrec_pause");
1420 logf("not recording");
1424 logf("already paused");
1432 logf("pcmrec_pause done");
1433 } /* pcmrec_pause */
1436 static void pcmrec_resume(void)
1438 logf("pcmrec_resume");
1442 logf("not recording");
1444 else if (!is_paused
)
1451 is_recording
= true;
1455 logf("pcmrec_resume done");
1456 } /* pcmrec_resume */
1458 static void pcmrec_thread(void) __attribute__((noreturn
));
1459 static void pcmrec_thread(void)
1461 struct queue_event ev
;
1463 logf("thread pcmrec start");
1469 /* Poll periodically to flush data */
1470 queue_wait_w_tmo(&pcmrec_queue
, &ev
, HZ
/5);
1472 if (ev
.id
== SYS_TIMEOUT
)
1474 /* Messages that interrupt this will complete it */
1475 pcmrec_flush(PCMREC_FLUSH_IF_HIGH
|
1476 PCMREC_FLUSH_INTERRUPTABLE
);
1482 /* Not doing anything - sit and wait for commands */
1483 queue_wait(&pcmrec_queue
, &ev
);
1496 case PCMREC_OPTIONS
:
1497 pcmrec_set_recording_options(
1498 (struct audio_recording_options
*)ev
.data
);
1502 clear_flush_interrupt();
1503 pcmrec_record((const char *)ev
.data
);
1507 clear_flush_interrupt();
1512 clear_flush_interrupt();
1520 case PCMREC_FLUSH_NUM
:
1521 pcmrec_flush((unsigned)ev
.data
);
1524 case SYS_USB_CONNECTED
:
1528 usb_acknowledge(SYS_USB_CONNECTED_ACK
);
1529 usb_wait_for_disconnect(&pcmrec_queue
);
1530 flush_interrupts
= 0;
1534 } /* pcmrec_thread */
1536 /****************************************************************************/
1538 /* following functions will be called by the encoder codec */
1539 /* in a free-threaded manner */
1541 /****************************************************************************/
1543 /* pass the encoder settings to the encoder */
1544 void enc_get_inputs(struct enc_inputs
*inputs
)
1546 inputs
->sample_rate
= sample_rate
;
1547 inputs
->num_channels
= num_channels
;
1548 inputs
->rec_mono_mode
= rec_mono_mode
;
1549 inputs
->config
= &enc_config
;
1550 } /* enc_get_inputs */
1552 /* set the encoder dimensions (called by encoder codec at initialization and
1554 void enc_set_parameters(struct enc_parameters
*params
)
1556 size_t bufsize
, resbytes
;
1558 logf("enc_set_parameters");
1563 /* Encoder is terminating */
1564 memset(&enc_config
, 0, sizeof (enc_config
));
1565 enc_sample_rate
= 0;
1566 cancel_cpu_boost(); /* Make sure no boost remains */
1570 enc_sample_rate
= params
->enc_sample_rate
;
1571 logf("enc sampr:%lu", enc_sample_rate
);
1573 pcm_rd_pos
= dma_wr_pos
;
1574 pcm_enc_pos
= pcm_rd_pos
;
1576 enc_config
.afmt
= params
->afmt
;
1577 /* addition of the header is always implied - chunk size 4-byte aligned */
1579 ALIGN_UP_P2(ENC_CHUNK_HDR_SIZE
+ params
->chunk_size
, 2);
1580 enc_events_callback
= params
->events_callback
;
1582 logf("chunk size:%lu", enc_chunk_size
);
1584 /*** Configure the buffers ***/
1586 /* Layout of recording buffer:
1587 * [ax] = possible alignment x multiple
1588 * [sx] = possible size alignment of x multiple
1589 * |[a16]|[s4]:PCM Buffer+PCM Guard|[s4 each]:Encoder Chunks|->
1590 * |[[s4]:Reserved Bytes]|Filename Queue->|[space]|
1592 resbytes
= ALIGN_UP_P2(params
->reserve_bytes
, 2);
1593 logf("resbytes:%lu", resbytes
);
1595 bufsize
= rec_buffer_size
- (enc_buffer
- pcm_buffer
) -
1596 resbytes
- FNQ_MIN_NUM_PATHS
*MAX_PATH
1598 - sizeof (*wrap_id_p
)
1602 enc_num_chunks
= bufsize
/ enc_chunk_size
;
1603 logf("num chunks:%d", enc_num_chunks
);
1605 /* get real amount used by encoder chunks */
1606 bufsize
= enc_num_chunks
*enc_chunk_size
;
1607 logf("enc size:%lu", bufsize
);
1610 /* add magic at wraparound for spillover checks */
1611 wrap_id_p
= SKIPBYTES((unsigned long *)enc_buffer
, bufsize
);
1612 bufsize
+= sizeof (*wrap_id_p
);
1613 *wrap_id_p
= ENC_CHUNK_MAGIC
;
1616 /** set OUT parameters **/
1617 params
->enc_buffer
= enc_buffer
;
1618 params
->buf_chunk_size
= enc_chunk_size
;
1619 params
->num_chunks
= enc_num_chunks
;
1621 /* calculate reserve buffer start and return pointer to encoder */
1622 params
->reserve_buffer
= NULL
;
1625 params
->reserve_buffer
= enc_buffer
+ bufsize
;
1626 bufsize
+= resbytes
;
1629 /* place filename queue at end of buffer using up whatever remains */
1630 fnq_rd_pos
= 0; /* reset */
1631 fnq_wr_pos
= 0; /* reset */
1632 fn_queue
= enc_buffer
+ bufsize
;
1633 fnq_size
= pcm_buffer
+ rec_buffer_size
- fn_queue
;
1634 fnq_size
/= MAX_PATH
;
1635 if (fnq_size
> FNQ_MAX_NUM_PATHS
)
1636 fnq_size
= FNQ_MAX_NUM_PATHS
;
1637 fnq_size
*= MAX_PATH
;
1638 logf("fnq files:%ld", fnq_size
/ MAX_PATH
);
1641 logf("ab :%08lX", (uintptr_t)audiobuf
);
1642 logf("pcm:%08lX", (uintptr_t)pcm_buffer
);
1643 logf("enc:%08lX", (uintptr_t)enc_buffer
);
1644 logf("res:%08lX", (uintptr_t)params
->reserve_buffer
);
1645 logf("wip:%08lX", (uintptr_t)wrap_id_p
);
1646 logf("fnq:%08lX", (uintptr_t)fn_queue
);
1647 logf("end:%08lX", (uintptr_t)fn_queue
+ fnq_size
);
1648 logf("abe:%08lX", (uintptr_t)audiobufend
);
1651 /* init all chunk headers and reset indexes */
1653 for (enc_wr_index
= enc_num_chunks
; enc_wr_index
> 0; )
1655 struct enc_chunk_hdr
*chunk
= GET_ENC_CHUNK(--enc_wr_index
);
1657 chunk
->id
= ENC_CHUNK_MAGIC
;
1662 logf("enc_set_parameters done");
1663 } /* enc_set_parameters */
1665 /* return encoder chunk at current write position -
1666 NOTE: can be called by pcmrec thread when splitting streams */
1667 struct enc_chunk_hdr
* enc_get_chunk(void)
1669 struct enc_chunk_hdr
*chunk
= GET_ENC_CHUNK(enc_wr_index
);
1672 if (chunk
->id
!= ENC_CHUNK_MAGIC
|| *wrap_id_p
!= ENC_CHUNK_MAGIC
)
1674 errors
|= PCMREC_E_CHUNK_OVF
;
1675 logf("finish chk ovf: %d", enc_wr_index
);
1679 chunk
->flags
&= CHUNKF_START_FILE
;
1682 chunk
->flags
|= CHUNKF_PRERECORD
;
1685 } /* enc_get_chunk */
1687 /* releases the current chunk into the available chunks -
1688 NOTE: can be called by pcmrec thread when splitting streams */
1689 void enc_finish_chunk(void)
1691 struct enc_chunk_hdr
*chunk
= GET_ENC_CHUNK(enc_wr_index
);
1693 if ((long)chunk
->flags
< 0)
1695 /* encoder set error flag */
1696 errors
|= PCMREC_E_ENCODER
;
1697 logf("finish chk enc error");
1700 /* advance enc_wr_index to the next encoder chunk */
1701 INC_ENC_INDEX(enc_wr_index
);
1703 if (enc_rd_index
!= enc_wr_index
)
1705 num_rec_bytes
+= chunk
->enc_size
;
1706 num_rec_samples
+= chunk
->num_pcm
;
1708 accum_rec_bytes
+= chunk
->enc_size
;
1709 accum_pcm_samples
+= chunk
->num_pcm
;
1712 else if (is_recording
) /* buffer full */
1714 /* keep current position and put up warning flag */
1715 warnings
|= PCMREC_W_ENC_BUFFER_OVF
;
1716 logf("enc_buffer ovf");
1717 DEC_ENC_INDEX(enc_wr_index
);
1720 /* if stream splitting, keep this out of circulation and
1721 flush a small number, then readd - cannot risk losing
1724 pcmrec_flush(PCMREC_FLUSH_MINI
);
1725 INC_ENC_INDEX(enc_wr_index
);
1730 /* advance enc_rd_index for prerecording */
1731 INC_ENC_INDEX(enc_rd_index
);
1733 } /* enc_finish_chunk */
1735 /* passes a pointer to next chunk of unprocessed wav data */
1736 /* TODO: this really should give the actual size returned */
1737 unsigned char * enc_get_pcm_data(size_t size
)
1739 int wp
= dma_wr_pos
;
1740 size_t avail
= (wp
- pcm_rd_pos
) & PCM_CHUNK_MASK
;
1742 /* limit the requested pcm data size */
1743 if (size
> PCM_MAX_FEED_SIZE
)
1744 size
= PCM_MAX_FEED_SIZE
;
1748 unsigned char *ptr
= pcm_buffer
+ pcm_rd_pos
;
1749 int next_pos
= (pcm_rd_pos
+ size
) & PCM_CHUNK_MASK
;
1751 pcm_enc_pos
= pcm_rd_pos
;
1752 pcm_rd_pos
= next_pos
;
1754 /* ptr must point to continous data at wraparound position */
1755 if ((size_t)pcm_rd_pos
< size
)
1757 memcpy(pcm_buffer
+ PCM_NUM_CHUNKS
*PCM_CHUNK_SIZE
,
1758 pcm_buffer
, pcm_rd_pos
);
1761 if (avail
>= (sample_rate
<< 2))
1763 /* Filling up - boost codec */
1764 trigger_cpu_boost();
1767 pcm_buffer_empty
= false;
1771 /* not enough data available - encoder should idle */
1772 pcm_buffer_empty
= true;
1776 /* Sleep long enough to allow one frame on average */
1780 } /* enc_get_pcm_data */
1782 /* puts some pcm data back in the queue */
1783 size_t enc_unget_pcm_data(size_t size
)
1785 int wp
= dma_wr_pos
;
1786 size_t old_avail
= ((pcm_rd_pos
- wp
) & PCM_CHUNK_MASK
) -
1789 /* allow one interrupt to occur during this call and not have the
1790 new read position inside the DMA destination chunk */
1791 if ((ssize_t
)old_avail
> 0)
1793 /* limit size to amount of old data remaining */
1794 if (size
> old_avail
)
1797 pcm_enc_pos
= (pcm_rd_pos
- size
) & PCM_CHUNK_MASK
;
1798 pcm_rd_pos
= pcm_enc_pos
;
1804 } /* enc_unget_pcm_data */