linux-imx

/*

 * Helper functions for indirect PCM data transfer to a simple FIFO in

 * hardware (small, no possibility to read "hardware io position",

 * updating position done by interrupt, ...)

 *

 *  Copyright (c) by 2007  Joachim Foerster <JOFT@gmx.de>

 *

 *  Based on "pcm-indirect.h" (alsa-driver-1.0.13) by

 *

 *  Copyright (c) by Takashi Iwai <tiwai@suse.de>

 *                   Jaroslav Kysela <perex@suse.cz>

 *

 *   This program is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation; either version 2 of the License, or

 *   (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program; if not, write to the Free Software

 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

​

/* snd_printk/d() */

#include <sound/core.h>

/* struct snd_pcm_substream, struct snd_pcm_runtime, snd_pcm_uframes_t

 * snd_pcm_period_elapsed() */

#include <sound/pcm.h>

​

#include "pcm-indirect2.h"

​

#ifdef SND_PCM_INDIRECT2_STAT

/* jiffies */

#include <linux/jiffies.h>

​

void snd_pcm_indirect2_stat(struct snd_pcm_substream *substream,

                struct snd_pcm_indirect2 *rec)

{

    struct snd_pcm_runtime *runtime = substream->runtime;

    int i;

    int j;

    int k;

    int seconds = (rec->lastbytetime - rec->firstbytetime) / HZ;

​

    snd_printk(KERN_DEBUG "STAT: mul_elapsed: %u, mul_elapsed_real: %d, "

           "irq_occurred: %d\n",

           rec->mul_elapsed, rec->mul_elapsed_real, rec->irq_occured);

    snd_printk(KERN_DEBUG "STAT: min_multiple: %d (irqs/period)\n",

           rec->min_multiple);

    snd_printk(KERN_DEBUG "STAT: firstbytetime: %lu, lastbytetime: %lu, "

           "firstzerotime: %lu\n",

         rec->firstbytetime, rec->lastbytetime, rec->firstzerotime);

    snd_printk(KERN_DEBUG "STAT: bytes2hw: %u Bytes => (by runtime->rate) "

           "length: %d s\n",

         rec->bytes2hw, rec->bytes2hw / 2 / 2 / runtime->rate);

    snd_printk(KERN_DEBUG "STAT: (by measurement) length: %d => "

           "rate: %d Bytes/s = %d Frames/s|Hz\n",

           seconds, rec->bytes2hw / seconds,

           rec->bytes2hw / 2 / 2 / seconds);