| feeder_rate.c (110108) | feeder_rate.c (110466) |
|---|---|
| 1/* 2 * Copyright (c) 2003 Orion Hodson <orion@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 34 unchanged lines hidden (view full) --- 43 * testing revisions. 44 */ 45 46#ifdef _KERNEL 47 48#include <dev/sound/pcm/sound.h> 49#include "feeder_if.h" 50 | 1/* 2 * Copyright (c) 2003 Orion Hodson <orion@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 34 unchanged lines hidden (view full) --- 43 * testing revisions. 44 */ 45 46#ifdef _KERNEL 47 48#include <dev/sound/pcm/sound.h> 49#include "feeder_if.h" 50 |
| 51SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pcm/feeder_rate.c 110108 2003-01-30 16:32:56Z orion $"); | 51SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pcm/feeder_rate.c 110466 2003-02-06 17:32:02Z orion $"); 52 53#endif /* _KERNEL */ 54 |
| 52MALLOC_DEFINE(M_RATEFEEDER, "ratefeed", "pcm rate feeder"); 53 | 55MALLOC_DEFINE(M_RATEFEEDER, "ratefeed", "pcm rate feeder"); 56 |
| 54#define RATE_ASSERT(x, y) /* KASSERT(x,y) */ 55#define RATE_TRACE(x...) /* printf(x) */ | 57#ifndef RATE_ASSERT 58#define RATE_ASSERT(x, y) /* KASSERT(x) */ 59#endif /* RATE_ASSERT */ |
| 56 | 60 |
| 57#endif /* _KERNEL */ | 61#ifndef RATE_TRACE 62#define RATE_TRACE(x...) /* printf(x) */ 63#endif |
| 58 59/*****************************************************************************/ | 64 65/*****************************************************************************/ |
| 60/* All of the following coefficients are coupled. They are chosen to be 61 * good in the operating space 4000-96000kHz work. Decreasing the 62 * granularity increases the required buffer size and affects the gain 63 * values at different points in the space. These values were found by 64 * running the test program with -p (probe) and some trial and error. | 66 67/* The following coefficients are coupled. They are chosen to be 68 * guarantee calculable factors for the interpolation routine. They 69 * have been tested over the range of RATEMIN-RATEMAX Hz. Decreasing 70 * the granularity increases the required buffer size and affects the 71 * gain values at different points in the space. These values were 72 * found by running the test program with -p (probe) and some trial 73 * and error. |
| 65 * 66 * ROUNDHZ the granularity of sample rates (fits n*11025 and n*8000). 67 * FEEDBUFSZ the amount of buffer space. 68 * MINGAIN the minimum acceptable gain in coefficients search. 69 */ 70#define ROUNDHZ 25 | 74 * 75 * ROUNDHZ the granularity of sample rates (fits n*11025 and n*8000). 76 * FEEDBUFSZ the amount of buffer space. 77 * MINGAIN the minimum acceptable gain in coefficients search. 78 */ 79#define ROUNDHZ 25 |
| 71#define FEEDBUFSZ 8192 | 80#define FEEDBUFSZ 8192 |
| 72#define MINGAIN 92 73 | 81#define MINGAIN 92 82 |
| 74#define RATEMIN 4000 75#define RATEMAX 96000 | 83#define RATEMIN 4000 84#define RATEMAX 48000 |
| 76 77struct feed_rate_info; 78 79typedef int (*rate_convert_method)(struct feed_rate_info *, 80 uint32_t, uint32_t, int16_t *); 81 82static int 83convert_stereo_up(struct feed_rate_info *info, --- 342 unchanged lines hidden (view full) --- 426 d_ticks = info->convert(info, s_ticks, d_ticks, 427 (int16_t*)(b + done)); 428 if (d_ticks == 0) 429 break; 430 done += d_ticks * bytes_per_tick(info); 431 432 RATE_ASSERT(info->buffer_pos <= info->buffer_ticks, 433 ("%s: buffer_ticks too big\n", __func__)); | 85 86struct feed_rate_info; 87 88typedef int (*rate_convert_method)(struct feed_rate_info *, 89 uint32_t, uint32_t, int16_t *); 90 91static int 92convert_stereo_up(struct feed_rate_info *info, --- 342 unchanged lines hidden (view full) --- 435 d_ticks = info->convert(info, s_ticks, d_ticks, 436 (int16_t*)(b + done)); 437 if (d_ticks == 0) 438 break; 439 done += d_ticks * bytes_per_tick(info); 440 441 RATE_ASSERT(info->buffer_pos <= info->buffer_ticks, 442 ("%s: buffer_ticks too big\n", __func__)); |
| 434 RATE_TRACE("%s: ticks %5d pos %d\n", __func__, 435 info->buffer_ticks, info->buffer_pos); | 443 RATE_ASSERT(info->buffer_ticks <= src_ticks_per_cycle(info), 444 ("too many ticks %d / %d\n", 445 info->buffer_ticks, src_ticks_per_cycle(info))); 446 RATE_TRACE("%s: ticks %5d / %d pos %d\n", __func__, 447 info->buffer_ticks, src_ticks_per_cycle(info), 448 info->buffer_pos); |
| 436 437 if (src_ticks_per_cycle(info) <= info->buffer_pos) { 438 /* End of cycle reached, copy last samples to start */ 439 uint8_t *u8b; 440 u8b = (uint8_t*)info->buffer; 441 bcopy(u8b + src_bytes_per_cycle(info), u8b, 442 bytes_per_tick(info)); 443 --- 12 unchanged lines hidden (view full) --- 456 457 if (done != count) { 458 RATE_TRACE("Only did %d of %d\n", done, count); 459 } 460 461 return done; 462} 463 | 449 450 if (src_ticks_per_cycle(info) <= info->buffer_pos) { 451 /* End of cycle reached, copy last samples to start */ 452 uint8_t *u8b; 453 u8b = (uint8_t*)info->buffer; 454 bcopy(u8b + src_bytes_per_cycle(info), u8b, 455 bytes_per_tick(info)); 456 --- 12 unchanged lines hidden (view full) --- 469 470 if (done != count) { 471 RATE_TRACE("Only did %d of %d\n", done, count); 472 } 473 474 return done; 475} 476 |
| 464#ifdef _KERNEL 465 | |
| 466static struct pcm_feederdesc feeder_rate_desc[] = { 467 {FEEDER_RATE, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0}, | 477static struct pcm_feederdesc feeder_rate_desc[] = { 478 {FEEDER_RATE, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0}, |
| 468 {0}, | 479 {0, 0, 0, 0}, |
| 469}; 470static kobj_method_t feeder_rate_methods[] = { 471 KOBJMETHOD(feeder_init, feed_rate_init), 472 KOBJMETHOD(feeder_free, feed_rate_free), 473 KOBJMETHOD(feeder_set, feed_rate_set), 474 KOBJMETHOD(feeder_get, feed_rate_get), 475 KOBJMETHOD(feeder_feed, feed_rate), | 480}; 481static kobj_method_t feeder_rate_methods[] = { 482 KOBJMETHOD(feeder_init, feed_rate_init), 483 KOBJMETHOD(feeder_free, feed_rate_free), 484 KOBJMETHOD(feeder_set, feed_rate_set), 485 KOBJMETHOD(feeder_get, feed_rate_get), 486 KOBJMETHOD(feeder_feed, feed_rate), |
| 476 { 0, 0 } | 487 {0, 0} |
| 477}; 478FEEDER_DECLARE(feeder_rate, 2, NULL); 479 | 488}; 489FEEDER_DECLARE(feeder_rate, 2, NULL); 490 |
| 480#endif /* _KERNEL */ | |