/******************************************************************************
* *
* easycap_sound.c *
* *
* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 *
* *
* *
******************************************************************************/
/*
*
* Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org>
*
*
* This 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.
*
* The software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*****************************************************************************/
#include "easycap.h"
#include "easycap_debug.h"
#include "easycap_sound.h"
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE AUDIO BUFFERS
* PROVIDED peasycap->audio_idle IS ZER0. REGARDLESS OF THIS BEING TRUE,
* IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO.
*/
/*---------------------------------------------------------------------------*/
void
easysnd_complete(struct urb *purb)
{
static int mt;
struct easycap *peasycap;
struct data_buffer *paudio_buffer;
char errbuf[16];
__u8 *p1, *p2;
__s16 s16;
int i, j, more, much, leap, rc;
#if defined(UPSAMPLE)
int k;
__s16 oldaudio, newaudio, delta;
#endif /*UPSAMPLE*/
JOT(16, "\n");
if (NULL == purb) {
SAY("ERROR: purb is NULL\n");
return;
}
peasycap = purb->context;
if (NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
return;
}
much = 0;
if (peasycap->audio_idle) {
JOT(16, "%i=audio_idle %i=audio_isoc_streaming\n", \
peasycap->audio_idle, peasycap->audio_isoc_streaming);
if (peasycap->audio_isoc_streaming) {
rc = usb_submit_urb(purb, GFP_ATOMIC);
if (0 != rc) {
SAY("ERROR: while %i=audio_idle, " \
"usb_submit_urb() failed with rc:\n", \
peasycap->audio_idle);
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n"); break;
}
case -ENODEV: {
SAY("ENODEV\n"); break;
}
case -ENXIO: {
SAY("ENXIO\n"); break;
}
case -EINVAL: {
SAY("EINVAL\n"); break;
}
case -EAGAIN: {
SAY("EAGAIN\n"); break;
}
case -EFBIG: {
SAY("EFBIG\n"); break;
}
case -EPIPE: {
SAY("EPIPE\n"); break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
default: {
SAY("0x%08X\n", rc); break;
}
}
}
}
return;
}
/*---------------------------------------------------------------------------*/
if (purb->status) {
if (-ESHUTDOWN == purb->status) {
JOT(16, "immediate return because -ESHUTDOWN=purb->status\n");
return;
}
SAY("ERROR: non-zero urb status:\n");
switch (purb->status) {
case -EINPROGRESS: {
SAY("-EINPROGRESS\n"); break;
}
case -ENOSR: {
SAY("-ENOSR\n"); break;
}
case -EPIPE: {
SAY("-EPIPE\n"); break;
}
case -EOVERFLOW: {
SAY("-EOVERFLOW\n"); break;
}
case -EPROTO: {
SAY("-EPROTO\n"); break;
}
case -EILSEQ: {
SAY("-EILSEQ\n"); break;
}
case -ETIMEDOUT: {
SAY("-ETIMEDOUT\n"); break;
}
case -EMSGSIZE: {
SAY("-EMSGSIZE\n"); break;
}
case -EOPNOTSUPP: {
SAY("-EOPNOTSUPP\n"); break;
}
case -EPFNOSUPPORT: {
SAY("-EPFNOSUPPORT\n"); break;
}
case -EAFNOSUPPORT: {
SAY("-EAFNOSUPPORT\n"); break;
}
case -EADDRINUSE: {
SAY("-EADDRINUSE\n"); break;
}
case -EADDRNOTAVAIL: {
SAY("-EADDRNOTAVAIL\n"); break;
}
case -ENOBUFS: {
SAY("-ENOBUFS\n"); break;
}
case -EISCONN: {
SAY("-EISCONN\n"); break;
}
case -ENOTCONN: {
SAY("-ENOTCONN\n"); break;
}
case -ESHUTDOWN: {
SAY("-ESHUTDOWN\n"); break;
}
case -ENOENT: {
SAY("-ENOENT\n"); break;
}
case -ECONNRESET: {
SAY("-ECONNRESET\n"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
default: {
SAY("unknown error code 0x%08X\n", purb->status); break;
}
}
/*---------------------------------------------------------------------------*/
/*
* RESUBMIT THIS URB AFTER AN ERROR
*
* (THIS IS DUPLICATE CODE TO REDUCE INDENTATION OF THE NO-ERROR PATH)
*/
/*---------------------------------------------------------------------------*/
if (peasycap->audio_isoc_streaming) {
rc = usb_submit_urb(purb, GFP_ATOMIC);
if (0 != rc) {
SAY("ERROR: while %i=audio_idle, usb_submit_urb() "
"failed with rc:\n", peasycap->audio_idle);
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n"); break;
}
case -ENODEV: {
SAY("ENODEV\n"); break;
}
case -ENXIO: {
SAY("ENXIO\n"); break;
}
case -EINVAL: {
SAY("EINVAL\n"); break;
}
case -EAGAIN: {
SAY("EAGAIN\n"); break;
}
case -EFBIG: {
SAY("EFBIG\n"); break;
}
case -EPIPE: {
SAY("EPIPE\n"); break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n"); break;
}
default: {
SAY("0x%08X\n", rc); break;
}
}
}
}
return;
}
/*---------------------------------------------------------------------------*/
/*
* PROCEED HERE WHEN NO ERROR
*/
/*---------------------------------------------------------------------------*/
#if defined(UPSAMPLE)
oldaudio = peasycap->oldaudio;
#endif /*UPSAMPLE*/
for (i = 0; i < purb->number_of_packets; i++) {
switch (purb->iso_frame_desc[i].status) {
case 0: {
strcpy(&errbuf[0], "OK"); break;
}
case -ENOENT: {
strcpy(&errbuf[0], "-ENOENT"); break;
}
case -EINPROGRESS: {
strcpy(&errbuf[0], "-EINPROGRESS"); break;
}
case -EPROTO: {
strcpy(&errbuf[0], "-EPROTO"); break;
}
case -EILSEQ: {
strcpy(&errbuf[0], "-EILSEQ"); break;
}
case -ETIME: {
strcpy(&errbuf[0], "-ETIME"); break;
}
case -ETIMEDOUT: {
strcpy(&errbuf[0], "-ETIMEDOUT"); break;
}
case -EPIPE: {
strcpy(&errbuf[0], "-EPIPE"); break;
}
case -ECOMM: {
strcpy(&errbuf[0], "-ECOMM"); break;
}
case -ENOSR: {
strcpy(&errbuf[0], "-ENOSR"); break;
}
case -EOVERFLOW: {
strcpy(&errbuf[0], "-EOVERFLOW"); break;
}
case -EREMOTEIO: {
strcpy(&errbuf[0], "-EREMOTEIO"); break;
}
case -ENODEV: {
strcpy(&errbuf[0], "-ENODEV"); break;
}
case -EXDEV: {
strcpy(&errbuf[0], "-EXDEV"); break;
}
case -EINVAL: {
strcpy(&errbuf[0], "-EINVAL"); break;
}
case -ECONNRESET: {
strcpy(&errbuf[0], "-ECONNRESET"); break;
}
case -ENOSPC: {
strcpy(&errbuf[0], "-ENOSPC"); break;
}
case -ESHUTDOWN: {
strcpy(&errbuf[0], "-ESHUTDOWN"); break;
}
default: {
strcpy(&errbuf[0], "UNKNOWN"); break;
}
}
if ((!purb->iso_frame_desc[i].status) && 0) {
JOT(16, "frame[%2i]: %i=status{=%16s} " \
"%5i=actual " \
"%5i=length " \
"%3i=offset\n", \
i, purb->iso_frame_desc[i].status, &errbuf[0],
purb->iso_frame_desc[i].actual_length,
purb->iso_frame_desc[i].length,
purb->iso_frame_desc[i].offset);
}
if (!purb->iso_frame_desc[i].status) {
more = purb->iso_frame_desc[i].actual_length;
#if defined(TESTTONE)
if (!more)
more = purb->iso_frame_desc[i].length;
#endif
if (!more)
mt++;
else {
if (mt) {
JOT(16, "%4i empty audio urb frames\n", mt);
mt = 0;
}
p1 = (__u8 *)(purb->transfer_buffer + \
purb->iso_frame_desc[i].offset);
leap = 0;
p1 += leap;
more -= leap;
/*---------------------------------------------------------------------------*/
/*
* COPY more BYTES FROM ISOC BUFFER TO AUDIO BUFFER,
* CONVERTING 8-BIT MONO TO 16-BIT SIGNED LITTLE-ENDIAN SAMPLES IF NECESSARY
*/
/*---------------------------------------------------------------------------*/
while (more) {
if (0 > more) {
SAY("easysnd_complete: MISTAKE: " \
"more is negative\n");
return;
}
if (peasycap->audio_buffer_page_many <= \
peasycap->audio_fill) {
SAY("ERROR: bad " \
"peasycap->audio_fill\n");
return;
}
paudio_buffer = &peasycap->audio_buffer\
[peasycap->audio_fill];
if (PAGE_SIZE < (paudio_buffer->pto - \
paudio_buffer->pgo)) {
SAY("ERROR: bad paudio_buffer->pto\n");
return;
}
if (PAGE_SIZE == (paudio_buffer->pto - \
paudio_buffer->pgo)) {
#if defined(TESTTONE)
easysnd_testtone(peasycap, \
peasycap->audio_fill);
#endif /*TESTTONE*/
paudio_buffer->pto = \
paudio_buffer->pgo;
(peasycap->audio_fill)++;
if (peasycap->\
audio_buffer_page_many <= \
peasycap->audio_fill)
peasycap->audio_fill = 0;
JOT(12, "bumped peasycap->" \
"audio_fill to %i\n", \
peasycap->audio_fill);
paudio_buffer = &peasycap->\
audio_buffer\
[peasycap->audio_fill];
paudio_buffer->pto = \
paudio_buffer->pgo;
if (!(peasycap->audio_fill % \
peasycap->\
audio_pages_per_fragment)) {
JOT(12, "wakeup call on wq_" \
"audio, %i=frag reading %i" \
"=fragment fill\n", \
(peasycap->audio_read / \
peasycap->\
audio_pages_per_fragment), \
(peasycap->audio_fill / \
peasycap->\
audio_pages_per_fragment));
wake_up_interruptible\
(&(peasycap->wq_audio));
}
}
much = PAGE_SIZE - (int)(paudio_buffer->pto -\
paudio_buffer->pgo);
if (false == peasycap->microphone) {
if (much > more)
much = more;
memcpy(paudio_buffer->pto, p1, much);
p1 += much;
more -= much;
} else {
#if defined(UPSAMPLE)
if (much % 16)
JOT(8, "MISTAKE? much" \
" is not divisible by 16\n");
if (much > (16 * \
more))
much = 16 * \
more;
p2 = (__u8 *)paudio_buffer->pto;
for (j = 0; j < (much/16); j++) {
newaudio = ((int) *p1) - 128;
newaudio = 128 * \
newaudio;
delta = (newaudio - oldaudio) \
/ 4;
s16 = oldaudio + delta;
for (k = 0; k < 4; k++) {
*p2 = (0x00FF & s16);
*(p2 + 1) = (0xFF00 & \
s16) >> 8;
p2 += 2;
*p2 = (0x00FF & s16);
*(p2 + 1) = (0xFF00 & \
s16) >> 8;
p2 += 2;
s16 += delta;
}
p1++;
more--;
oldaudio = s16;
}
#else
if (much > (2 * more))
much = 2 * more;
p2 = (__u8 *)paudio_buffer->pto;
for (j = 0; j < (much / 2); j++) {
s16 = ((int) *p1) - 128;
s16 = 128 * \
s16;
*p2 = (0x00FF & s16);
*(p2 + 1) = (0xFF00 & s16) >> \
8;
p1++; p2 += 2;
more--;
}
#endif /*UPSAMPLE*/
}
(paudio_buffer->pto) += much;
}
}
} else {
JOT(12, "discarding audio samples because " \
"%i=purb->iso_frame_desc[i].status\n", \
purb->iso_frame_desc[i].status);
}
#if defined(UPSAMPLE)
peasycap->oldaudio = oldaudio;
#endif /*UPSAMPLE*/
}
/*---------------------------------------------------------------------------*/
/*
* RESUBMIT THIS URB AFTER NO ERROR
*/
/*---------------------------------------------------------------------------*/
if (peasycap->audio_isoc_streaming) {
rc = usb_submit_urb(purb, GFP_ATOMIC);
if (0 != rc) {
SAY("ERROR: while %i=audio_idle, usb_submit_urb() failed " \
"with rc:\n", peasycap->audio_idle);
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n"); break;
}
case -ENODEV: {
SAY("ENODEV\n"); break;
}
case -ENXIO: {
SAY("ENXIO\n"); break;
}
case -EINVAL: {
SAY("EINVAL\n"); break;
}
case -EAGAIN: {
SAY("EAGAIN\n"); break;
}
case -EFBIG: {
SAY("EFBIG\n"); break;
}
case -EPIPE: {
SAY("EPIPE\n"); break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
default: {
SAY("0x%08X\n", rc); break;
}
}
}
}
return;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* THE AUDIO URBS ARE SUBMITTED AT THIS EARLY STAGE SO THAT IT IS POSSIBLE TO
* STREAM FROM /dev/easysnd1 WITH SIMPLE PROGRAMS SUCH AS cat WHICH DO NOT
* HAVE AN IOCTL INTERFACE. THE VIDEO URBS, BY CONTRAST, MUST BE SUBMITTED
* MUCH LATER: SEE COMMENTS IN FILE easycap_main.c.
*/
/*---------------------------------------------------------------------------*/
int
easysnd_open(struct inode *inode, struct file *file)
{
struct usb_interface *pusb_interface;
struct easycap *peasycap;
int subminor, rc;
JOT(4, "begins.\n");
subminor = iminor(inode);
pusb_interface = usb_find_interface(&easycap_usb_driver, subminor);
if (NULL == pusb_interface) {
SAY("ERROR: pusb_interface is NULL\n");
SAY("ending unsuccessfully\n");
return -1;
}
peasycap = usb_get_intfdata(pusb_interface);
if (NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
SAY("ending unsuccessfully\n");
return -1;
}
file->private_data = peasycap;
/*---------------------------------------------------------------------------*/
/*
* INITIALIZATION.
*/
/*---------------------------------------------------------------------------*/
JOT(4, "starting initialization\n");
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
} else {
JOT(16, "0x%08lX=peasycap->pusb_device\n", \
(long int)peasycap->pusb_device);
}
rc = audio_setup(peasycap);
if (0 <= rc)
JOT(8, "audio_setup() returned %i\n", rc);
else
JOT(8, "easysnd open(): ERROR: audio_setup() returned %i\n", rc);
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device has become NULL\n");
return -EFAULT;
}
rc = adjust_volume(peasycap, -8192);
if (0 != rc) {
SAY("ERROR: adjust_volume(default) returned %i\n", rc);
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device has become NULL\n");
return -EFAULT;
}
rc = usb_set_interface(peasycap->pusb_device, peasycap->audio_interface, \
peasycap->audio_altsetting_on);
JOT(8, "usb_set_interface(.,%i,%i) returned %i\n", peasycap->audio_interface, \
peasycap->audio_altsetting_on, rc);
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device has become NULL\n");
return -EFAULT;
}
rc = wakeup_device(peasycap->pusb_device);
if (0 == rc)
JOT(8, "wakeup_device() returned %i\n", rc);
else
JOT(8, "easysnd open(): ERROR: wakeup_device() returned %i\n", rc);
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device has become NULL\n");
return -EFAULT;
}
submit_audio_urbs(peasycap);
peasycap->audio_idle = 0;
peasycap->timeval1.tv_sec = 0;
peasycap->timeval1.tv_usec = 0;
JOT(4, "finished initialization\n");
return 0;
}
/*****************************************************************************/
int
easysnd_release(struct inode *inode, struct file *file)
{
struct easycap *peasycap;
JOT(4, "begins\n");
peasycap = file->private_data;
if (NULL == peasycap) {
SAY("ERROR: peasycap is NULL.\n");
return -EFAULT;
}
if (0 != kill_audio_urbs(peasycap)) {
SAY("ERROR: kill_audio_urbs() failed\n");
return -EFAULT;
}
JOT(4, "ending successfully\n");
return 0;
}
/*****************************************************************************/
ssize_t
easysnd_read(struct file *file, char __user *puserspacebuffer, \
size_t kount, loff_t *poff)
{
struct timeval timeval;
static struct timeval timeval1;
static long long int audio_bytes, above, below, mean;
struct signed_div_result sdr;
unsigned char *p0;
long int kount1, more, rc, l0, lm;
int fragment;
struct easycap *peasycap;
struct data_buffer *pdata_buffer;
size_t szret;
/*---------------------------------------------------------------------------*/
/*
* DO A BLOCKING READ TO TRANSFER DATA TO USER SPACE.
*
******************************************************************************
***** N.B. IF THIS FUNCTION RETURNS 0, NOTHING IS SEEN IN USER SPACE. ******
***** THIS CONDITION SIGNIFIES END-OF-FILE. ******
******************************************************************************
*/
/*---------------------------------------------------------------------------*/
JOT(8, "===== easysnd_read(): kount=%i, *poff=%i\n", (int)kount, (int)(*poff));
peasycap = (struct easycap *)(file->private_data);
if (NULL == peasycap) {
SAY("ERROR in easysnd_read(): peasycap is NULL\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
if ((0 > peasycap->audio_read) || \
(peasycap->audio_buffer_page_many <= peasycap->audio_read)) {
SAY("ERROR: peasycap->audio_read out of range\n");
return -EFAULT;
}
pdata_buffer = &peasycap->audio_buffer[peasycap->audio_read];
if ((struct data_buffer *)NULL == pdata_buffer) {
SAY("ERROR: pdata_buffer is NULL\n");
return -EFAULT;
}
JOT(12, "before wait, %i=frag read %i=frag fill\n", \
(peasycap->audio_read / peasycap->audio_pages_per_fragment), \
(peasycap->audio_fill / peasycap->audio_pages_per_fragment));
fragment = (peasycap->audio_read / peasycap->audio_pages_per_fragment);
while ((fragment == (peasycap->audio_fill / \
peasycap->audio_pages_per_fragment)) || \
(0 == (PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo)))) {
if (file->f_flags & O_NONBLOCK) {
JOT(16, "returning -EAGAIN as instructed\n");
return -EAGAIN;
}
rc = wait_event_interruptible(peasycap->wq_audio, \
(peasycap->audio_idle || peasycap->audio_eof || \
((fragment != (peasycap->audio_fill / \
peasycap->audio_pages_per_fragment)) && \
(0 < (PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo))))));
if (0 != rc) {
SAY("aborted by signal\n");
return -ERESTARTSYS;
}
if (peasycap->audio_eof) {
JOT(8, "returning 0 because %i=audio_eof\n", \
peasycap->audio_eof);
kill_audio_urbs(peasycap);
msleep(500);
return 0;
}
if (peasycap->audio_idle) {
JOT(16, "returning 0 because %i=audio_idle\n", \
peasycap->audio_idle);
return 0;
}
if (!peasycap->audio_isoc_streaming) {
JOT(16, "returning 0 because audio urbs not streaming\n");
return 0;
}
}
JOT(12, "after wait, %i=frag read %i=frag fill\n", \
(peasycap->audio_read / peasycap->audio_pages_per_fragment), \
(peasycap->audio_fill / peasycap->audio_pages_per_fragment));
szret = (size_t)0;
while (fragment == (peasycap->audio_read / \
peasycap->audio_pages_per_fragment)) {
if (NULL == pdata_buffer->pgo) {
SAY("ERROR: pdata_buffer->pgo is NULL\n");
return -EFAULT;
}
if (NULL == pdata_buffer->pto) {
SAY("ERROR: pdata_buffer->pto is NULL\n");
return -EFAULT;
}
kount1 = PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo);
if (0 > kount1) {
SAY("easysnd_read: MISTAKE: kount1 is negative\n");
return -ERESTARTSYS;
}
if (!kount1) {
(peasycap->audio_read)++;
if (peasycap->audio_buffer_page_many <= peasycap->audio_read)
peasycap->audio_read = 0;
JOT(12, "bumped peasycap->audio_read to %i\n", \
peasycap->audio_read);
if (fragment != (peasycap->audio_read / \
peasycap->audio_pages_per_fragment))
break;
if ((0 > peasycap->audio_read) || \
(peasycap->audio_buffer_page_many <= \
peasycap->audio_read)) {
SAY("ERROR: peasycap->audio_read out of range\n");
return -EFAULT;
}
pdata_buffer = &peasycap->audio_buffer[peasycap->audio_read];
if ((struct data_buffer *)NULL == pdata_buffer) {
SAY("ERROR: pdata_buffer is NULL\n");
return -EFAULT;
}
if (NULL == pdata_buffer->pgo) {
SAY("ERROR: pdata_buffer->pgo is NULL\n");
return -EFAULT;
}
if (NULL == pdata_buffer->pto) {
SAY("ERROR: pdata_buffer->pto is NULL\n");
return -EFAULT;
}
kount1 = PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo);
}
JOT(12, "ready to send %li bytes\n", (long int) kount1);
JOT(12, "still to send %li bytes\n", (long int) kount);
more = kount1;
if (more > kount)
more = kount;
JOT(12, "agreed to send %li bytes from page %i\n", \
more, peasycap->audio_read);
if (!more)
break;
/*---------------------------------------------------------------------------*/
/*
* ACCUMULATE DYNAMIC-RANGE INFORMATION
*/
/*---------------------------------------------------------------------------*/
p0 = (unsigned char *)pdata_buffer->pgo; l0 = 0; lm = more/2;
while (l0 < lm) {
SUMMER(p0, &peasycap->audio_sample, &peasycap->audio_niveau, \
&peasycap->audio_square); l0++; p0 += 2;
}
/*---------------------------------------------------------------------------*/
rc = copy_to_user(puserspacebuffer, pdata_buffer->pto, more);
if (0 != rc) {
SAY("ERROR: copy_to_user() returned %li\n", rc);
return -EFAULT;
}
*poff += (loff_t)more;
szret += (size_t)more;
pdata_buffer->pto += more;
puserspacebuffer += more;
kount -= (size_t)more;
}
JOT(12, "after read, %i=frag read %i=frag fill\n", \
(peasycap->audio_read / peasycap->audio_pages_per_fragment), \
(peasycap->audio_fill / peasycap->audio_pages_per_fragment));
if (kount < 0) {
SAY("MISTAKE: %li=kount %li=szret\n", \
(long int)kount, (long int)szret);
}
/*---------------------------------------------------------------------------*/
/*
* CALCULATE DYNAMIC RANGE FOR (VAPOURWARE) AUTOMATIC VOLUME CONTROL
*/
/*---------------------------------------------------------------------------*/
if (peasycap->audio_sample) {
below = peasycap->audio_sample;
above = peasycap->audio_square;
sdr = signed_div(above, below);
above = sdr.quotient;
mean = peasycap->audio_niveau;
sdr = signed_div(mean, peasycap->audio_sample);
JOT(8, "%8lli=mean %8lli=meansquare after %lli samples, =>\n", \
sdr.quotient, above, peasycap->audio_sample);
sdr = signed_div(above, 32768);
JOT(8, "audio dynamic range is roughly %lli\n", sdr.quotient);
}
/*---------------------------------------------------------------------------*/
/*
* UPDATE THE AUDIO CLOCK
*/
/*---------------------------------------------------------------------------*/
do_gettimeofday(&timeval);
if (!peasycap->timeval1.tv_sec) {
audio_bytes = 0;
timeval1 = timeval;
if (mutex_lock_interruptible(&(peasycap->mutex_timeval1)))
return -ERESTARTSYS;
peasycap->timeval1 = timeval1;
mutex_unlock(&(peasycap->mutex_timeval1));
sdr.quotient = 192000;
} else {
audio_bytes += (long long int) szret;
below = ((long long int)(1000000)) * \
((long long int)(timeval.tv_sec - timeval1.tv_sec)) + \
(long long int)(timeval.tv_usec - timeval1.tv_usec);
above = 1000000 * ((long long int) audio_bytes);
if (below)
sdr = signed_div(above, below);
else
sdr.quotient = 192000;
}
JOT(8, "audio streaming at %lli bytes/second\n", sdr.quotient);
if (mutex_lock_interruptible(&(peasycap->mutex_timeval1)))
return -ERESTARTSYS;
peasycap->dnbydt = sdr.quotient;
mutex_unlock(&(peasycap->mutex_timeval1));
JOT(8, "returning %li\n", (long int)szret);
return szret;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* SUBMIT ALL AUDIO URBS.
*/
/*---------------------------------------------------------------------------*/
int
submit_audio_urbs(struct easycap *peasycap)
{
struct data_urb *pdata_urb;
struct urb *purb;
struct list_head *plist_head;
int j, isbad, m, rc;
int isbuf;
if ((struct list_head *)NULL == peasycap->purb_audio_head) {
SAY("ERROR: peasycap->urb_audio_head uninitialized\n");
return -EFAULT;
}
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
}
if (!peasycap->audio_isoc_streaming) {
JOT(4, "initial submission of all audio urbs\n");
rc = usb_set_interface(peasycap->pusb_device,
peasycap->audio_interface, \
peasycap->audio_altsetting_on);
JOT(8, "usb_set_interface(.,%i,%i) returned %i\n", \
peasycap->audio_interface, \
peasycap->audio_altsetting_on, rc);
isbad = 0; m = 0;
list_for_each(plist_head, (peasycap->purb_audio_head)) {
pdata_urb = list_entry(plist_head, struct data_urb, list_head);
if (NULL != pdata_urb) {
purb = pdata_urb->purb;
if (NULL != purb) {
isbuf = pdata_urb->isbuf;
purb->interval = 1;
purb->dev = peasycap->pusb_device;
purb->pipe = \
usb_rcvisocpipe(peasycap->pusb_device,\
peasycap->audio_endpointnumber);
purb->transfer_flags = URB_ISO_ASAP;
purb->transfer_buffer = \
peasycap->audio_isoc_buffer[isbuf].pgo;
purb->transfer_buffer_length = \
peasycap->audio_isoc_buffer_size;
purb->complete = easysnd_complete;
purb->context = peasycap;
purb->start_frame = 0;
purb->number_of_packets = \
peasycap->audio_isoc_framesperdesc;
for (j = 0; j < peasycap->\
audio_isoc_framesperdesc; \
j++) {
purb->iso_frame_desc[j].offset = j * \
peasycap->\
audio_isoc_maxframesize;
purb->iso_frame_desc[j].length = \
peasycap->\
audio_isoc_maxframesize;
}
rc = usb_submit_urb(purb, GFP_KERNEL);
if (0 != rc) {
isbad++;
SAY("ERROR: usb_submit_urb() failed" \
" for urb with rc:\n");
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n"); break;
}
case -ENODEV: {
SAY("ENODEV\n"); break;
}
case -ENXIO: {
SAY("ENXIO\n"); break;
}
case -EINVAL: {
SAY("EINVAL\n"); break;
}
case -EAGAIN: {
SAY("EAGAIN\n"); break;
}
case -EFBIG: {
SAY("EFBIG\n"); break;
}
case -EPIPE: {
SAY("EPIPE\n"); break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
default: {
SAY("unknown error code %i\n",\
rc); break;
}
}
} else {
m++;
}
} else {
isbad++;
}
} else {
isbad++;
}
}
if (isbad) {
JOT(4, "attempting cleanup instead of submitting\n");
list_for_each(plist_head, (peasycap->purb_audio_head)) {
pdata_urb = list_entry(plist_head, struct data_urb, \
list_head);
if (NULL != pdata_urb) {
purb = pdata_urb->purb;
if (NULL != purb)
usb_kill_urb(purb);
}
}
peasycap->audio_isoc_streaming = 0;
} else {
peasycap->audio_isoc_streaming = 1;
JOT(4, "submitted %i audio urbs\n", m);
}
} else
JOT(4, "already streaming audio urbs\n");
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* KILL ALL AUDIO URBS.
*/
/*---------------------------------------------------------------------------*/
int
kill_audio_urbs(struct easycap *peasycap)
{
int m;
struct list_head *plist_head;
struct data_urb *pdata_urb;
if (peasycap->audio_isoc_streaming) {
if ((struct list_head *)NULL != peasycap->purb_audio_head) {
peasycap->audio_isoc_streaming = 0;
JOT(4, "killing audio urbs\n");
m = 0;
list_for_each(plist_head, (peasycap->purb_audio_head)) {
pdata_urb = list_entry(plist_head, struct data_urb,
list_head);
if ((struct data_urb *)NULL != pdata_urb) {
if ((struct urb *)NULL != pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
}
JOT(4, "%i audio urbs killed\n", m);
} else {
SAY("ERROR: peasycap->purb_audio_head is NULL\n");
return -EFAULT;
}
} else {
JOT(8, "%i=audio_isoc_streaming, no audio urbs killed\n", \
peasycap->audio_isoc_streaming);
}
return 0;
}
/*****************************************************************************/
