1234 lines
32 KiB
C
1234 lines
32 KiB
C
/******************************************************************************
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* *
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* easycap_sound.c *
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* *
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* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 *
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* *
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* *
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******************************************************************************/
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/*
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*
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* Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org>
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*
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*****************************************************************************/
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#include "easycap.h"
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#include "easycap_debug.h"
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#include "easycap_sound.h"
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/*****************************************************************************/
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/*---------------------------------------------------------------------------*/
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/*
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* ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE AUDIO BUFFERS
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* PROVIDED peasycap->audio_idle IS ZERO. REGARDLESS OF THIS BEING TRUE,
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* IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO.
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*/
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/*---------------------------------------------------------------------------*/
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void
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easysnd_complete(struct urb *purb)
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{
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struct easycap *peasycap;
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struct data_buffer *paudio_buffer;
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__u8 *p1, *p2;
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__s16 s16;
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int i, j, more, much, leap, rc;
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#if defined(UPSAMPLE)
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int k;
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__s16 oldaudio, newaudio, delta;
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#endif /*UPSAMPLE*/
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JOT(16, "\n");
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if (NULL == purb) {
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SAY("ERROR: purb is NULL\n");
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return;
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}
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peasycap = purb->context;
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if (NULL == peasycap) {
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SAY("ERROR: peasycap is NULL\n");
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return;
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}
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if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
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SAY("ERROR: bad peasycap\n");
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return;
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}
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much = 0;
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if (peasycap->audio_idle) {
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JOM(16, "%i=audio_idle %i=audio_isoc_streaming\n", \
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peasycap->audio_idle, peasycap->audio_isoc_streaming);
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if (peasycap->audio_isoc_streaming) {
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rc = usb_submit_urb(purb, GFP_ATOMIC);
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if (0 != rc) {
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if (-ENODEV != rc)
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SAM("ERROR: while %i=audio_idle, " \
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"usb_submit_urb() failed with rc:\n", \
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peasycap->audio_idle);
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switch (rc) {
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case -ENOMEM: {
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SAM("-ENOMEM\n");
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break;
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}
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case -ENODEV: {
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break;
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}
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case -ENXIO: {
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SAM("-ENXIO\n");
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break;
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}
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case -EINVAL: {
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SAM("-EINVAL\n");
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break;
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}
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case -EAGAIN: {
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SAM("-EAGAIN\n");
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break;
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}
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case -EFBIG: {
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SAM("-EFBIG\n");
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break;
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}
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case -EPIPE: {
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SAM("-EPIPE\n");
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break;
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}
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case -EMSGSIZE: {
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SAM("-EMSGSIZE\n");
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break;
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}
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case -ENOSPC: {
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SAM("-ENOSPC\n");
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break;
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}
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default: {
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SAM("unknown error: 0x%08X\n", rc);
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break;
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}
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}
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}
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}
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return;
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}
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/*---------------------------------------------------------------------------*/
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if (purb->status) {
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if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) {
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JOM(16, "urb status -ESHUTDOWN or -ENOENT\n");
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return;
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}
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SAM("ERROR: non-zero urb status:\n");
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switch (purb->status) {
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case -EINPROGRESS: {
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SAM("-EINPROGRESS\n");
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break;
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}
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case -ENOSR: {
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SAM("-ENOSR\n");
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break;
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}
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case -EPIPE: {
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SAM("-EPIPE\n");
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break;
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}
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case -EOVERFLOW: {
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SAM("-EOVERFLOW\n");
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break;
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}
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case -EPROTO: {
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SAM("-EPROTO\n");
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break;
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}
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case -EILSEQ: {
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SAM("-EILSEQ\n");
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break;
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}
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case -ETIMEDOUT: {
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SAM("-ETIMEDOUT\n");
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break;
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}
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case -EMSGSIZE: {
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SAM("-EMSGSIZE\n");
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break;
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}
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case -EOPNOTSUPP: {
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SAM("-EOPNOTSUPP\n");
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break;
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}
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case -EPFNOSUPPORT: {
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SAM("-EPFNOSUPPORT\n");
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break;
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}
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case -EAFNOSUPPORT: {
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SAM("-EAFNOSUPPORT\n");
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break;
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}
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case -EADDRINUSE: {
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SAM("-EADDRINUSE\n");
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break;
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}
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case -EADDRNOTAVAIL: {
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SAM("-EADDRNOTAVAIL\n");
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break;
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}
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case -ENOBUFS: {
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SAM("-ENOBUFS\n");
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break;
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}
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case -EISCONN: {
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SAM("-EISCONN\n");
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break;
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}
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case -ENOTCONN: {
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SAM("-ENOTCONN\n");
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break;
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}
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case -ESHUTDOWN: {
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SAM("-ESHUTDOWN\n");
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break;
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}
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case -ENOENT: {
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SAM("-ENOENT\n");
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break;
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}
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case -ECONNRESET: {
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SAM("-ECONNRESET\n");
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break;
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}
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case -ENOSPC: {
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SAM("ENOSPC\n");
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break;
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}
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default: {
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SAM("unknown error code 0x%08X\n", purb->status);
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break;
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}
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}
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/*---------------------------------------------------------------------------*/
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/*
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* RESUBMIT THIS URB AFTER AN ERROR
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*
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* (THIS IS DUPLICATE CODE TO REDUCE INDENTATION OF THE NO-ERROR PATH)
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*/
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/*---------------------------------------------------------------------------*/
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if (peasycap->audio_isoc_streaming) {
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rc = usb_submit_urb(purb, GFP_ATOMIC);
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if (0 != rc) {
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SAM("ERROR: while %i=audio_idle, usb_submit_urb() "
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"failed with rc:\n", peasycap->audio_idle);
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switch (rc) {
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case -ENOMEM: {
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SAM("-ENOMEM\n");
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break;
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}
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case -ENODEV: {
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SAM("-ENODEV\n");
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break;
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}
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case -ENXIO: {
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SAM("-ENXIO\n");
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break;
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}
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case -EINVAL: {
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SAM("-EINVAL\n");
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break;
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}
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case -EAGAIN: {
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SAM("-EAGAIN\n");
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break;
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}
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case -EFBIG: {
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SAM("-EFBIG\n");
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break;
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}
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case -EPIPE: {
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SAM("-EPIPE\n");
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break;
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}
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case -EMSGSIZE: {
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SAM("-EMSGSIZE\n");
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break;
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}
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default: {
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SAM("0x%08X\n", rc); break;
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}
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}
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}
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}
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return;
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}
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/*---------------------------------------------------------------------------*/
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/*
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* PROCEED HERE WHEN NO ERROR
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*/
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/*---------------------------------------------------------------------------*/
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#if defined(UPSAMPLE)
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oldaudio = peasycap->oldaudio;
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#endif /*UPSAMPLE*/
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for (i = 0; i < purb->number_of_packets; i++) {
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switch (purb->iso_frame_desc[i].status) {
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case 0: {
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break;
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}
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case -ENOENT: {
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SAM("-ENOENT\n");
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break;
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}
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case -EINPROGRESS: {
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SAM("-EINPROGRESS\n");
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break;
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}
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case -EPROTO: {
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SAM("-EPROTO\n");
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break;
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}
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case -EILSEQ: {
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SAM("-EILSEQ\n");
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break;
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}
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case -ETIME: {
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SAM("-ETIME\n");
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break;
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}
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case -ETIMEDOUT: {
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SAM("-ETIMEDOUT\n");
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break;
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}
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case -EPIPE: {
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SAM("-EPIPE\n");
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break;
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}
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case -ECOMM: {
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SAM("-ECOMM\n");
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break;
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}
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case -ENOSR: {
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SAM("-ENOSR\n");
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break;
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}
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case -EOVERFLOW: {
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SAM("-EOVERFLOW\n");
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break;
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}
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case -EREMOTEIO: {
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SAM("-EREMOTEIO\n");
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break;
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}
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case -ENODEV: {
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SAM("-ENODEV\n");
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break;
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}
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case -EXDEV: {
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SAM("-EXDEV\n");
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break;
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}
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case -EINVAL: {
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SAM("-EINVAL\n");
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break;
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}
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case -ECONNRESET: {
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SAM("-ECONNRESET\n");
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break;
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}
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case -ENOSPC: {
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SAM("-ENOSPC\n");
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break;
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}
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case -ESHUTDOWN: {
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SAM("-ESHUTDOWN\n");
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break;
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}
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default: {
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SAM("unknown error:0x%08X\n", purb->iso_frame_desc[i].status);
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break;
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}
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}
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if (!purb->iso_frame_desc[i].status) {
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more = purb->iso_frame_desc[i].actual_length;
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#if defined(TESTTONE)
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if (!more)
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more = purb->iso_frame_desc[i].length;
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#endif
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if (!more)
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peasycap->audio_mt++;
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else {
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if (peasycap->audio_mt) {
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JOM(16, "%4i empty audio urb frames\n", \
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peasycap->audio_mt);
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peasycap->audio_mt = 0;
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}
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p1 = (__u8 *)(purb->transfer_buffer + \
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purb->iso_frame_desc[i].offset);
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leap = 0;
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p1 += leap;
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more -= leap;
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/*---------------------------------------------------------------------------*/
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/*
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* COPY more BYTES FROM ISOC BUFFER TO AUDIO BUFFER,
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* CONVERTING 8-BIT MONO TO 16-BIT SIGNED LITTLE-ENDIAN SAMPLES IF NECESSARY
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*/
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/*---------------------------------------------------------------------------*/
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while (more) {
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if (0 > more) {
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SAM("easysnd_complete: MISTAKE: " \
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"more is negative\n");
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return;
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}
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if (peasycap->audio_buffer_page_many <= \
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peasycap->audio_fill) {
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SAM("ERROR: bad " \
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"peasycap->audio_fill\n");
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return;
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}
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paudio_buffer = &peasycap->audio_buffer\
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[peasycap->audio_fill];
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if (PAGE_SIZE < (paudio_buffer->pto - \
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paudio_buffer->pgo)) {
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SAM("ERROR: bad paudio_buffer->pto\n");
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return;
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}
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if (PAGE_SIZE == (paudio_buffer->pto - \
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paudio_buffer->pgo)) {
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#if defined(TESTTONE)
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easysnd_testtone(peasycap, \
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peasycap->audio_fill);
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#endif /*TESTTONE*/
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paudio_buffer->pto = \
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paudio_buffer->pgo;
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(peasycap->audio_fill)++;
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if (peasycap->\
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audio_buffer_page_many <= \
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peasycap->audio_fill)
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peasycap->audio_fill = 0;
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JOM(12, "bumped peasycap->" \
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"audio_fill to %i\n", \
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peasycap->audio_fill);
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paudio_buffer = &peasycap->\
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audio_buffer\
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[peasycap->audio_fill];
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paudio_buffer->pto = \
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paudio_buffer->pgo;
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if (!(peasycap->audio_fill % \
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peasycap->\
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audio_pages_per_fragment)) {
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JOM(12, "wakeup call on wq_" \
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"audio, %i=frag reading %i" \
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"=fragment fill\n", \
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(peasycap->audio_read / \
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peasycap->\
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audio_pages_per_fragment), \
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(peasycap->audio_fill / \
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peasycap->\
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audio_pages_per_fragment));
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wake_up_interruptible\
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(&(peasycap->wq_audio));
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}
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}
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much = PAGE_SIZE - (int)(paudio_buffer->pto -\
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paudio_buffer->pgo);
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if (false == peasycap->microphone) {
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if (much > more)
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much = more;
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memcpy(paudio_buffer->pto, p1, much);
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p1 += much;
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more -= much;
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} else {
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#if defined(UPSAMPLE)
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if (much % 16)
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JOM(8, "MISTAKE? much" \
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" is not divisible by 16\n");
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if (much > (16 * \
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more))
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much = 16 * \
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more;
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p2 = (__u8 *)paudio_buffer->pto;
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for (j = 0; j < (much/16); j++) {
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newaudio = ((int) *p1) - 128;
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newaudio = 128 * \
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newaudio;
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delta = (newaudio - oldaudio) \
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/ 4;
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s16 = oldaudio + delta;
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for (k = 0; k < 4; k++) {
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*p2 = (0x00FF & s16);
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*(p2 + 1) = (0xFF00 & \
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s16) >> 8;
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p2 += 2;
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*p2 = (0x00FF & s16);
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*(p2 + 1) = (0xFF00 & \
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s16) >> 8;
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p2 += 2;
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s16 += delta;
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}
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p1++;
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more--;
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oldaudio = s16;
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}
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#else
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if (much > (2 * more))
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much = 2 * more;
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p2 = (__u8 *)paudio_buffer->pto;
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for (j = 0; j < (much / 2); j++) {
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s16 = ((int) *p1) - 128;
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s16 = 128 * \
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s16;
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*p2 = (0x00FF & s16);
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*(p2 + 1) = (0xFF00 & s16) >> \
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8;
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p1++; p2 += 2;
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more--;
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}
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#endif /*UPSAMPLE*/
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}
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(paudio_buffer->pto) += much;
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}
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}
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} else {
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JOM(12, "discarding audio samples because " \
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"%i=purb->iso_frame_desc[i].status\n", \
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purb->iso_frame_desc[i].status);
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}
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#if defined(UPSAMPLE)
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peasycap->oldaudio = oldaudio;
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#endif /*UPSAMPLE*/
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}
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/*---------------------------------------------------------------------------*/
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/*
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* RESUBMIT THIS URB AFTER NO ERROR
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*/
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/*---------------------------------------------------------------------------*/
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if (peasycap->audio_isoc_streaming) {
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rc = usb_submit_urb(purb, GFP_ATOMIC);
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if (0 != rc) {
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if (-ENODEV != rc) {
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SAM("ERROR: while %i=audio_idle, " \
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"usb_submit_urb() failed " \
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"with rc:\n", peasycap->audio_idle);
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}
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switch (rc) {
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case -ENOMEM: {
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SAM("-ENOMEM\n");
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break;
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}
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case -ENODEV: {
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break;
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}
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case -ENXIO: {
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SAM("-ENXIO\n");
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break;
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}
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case -EINVAL: {
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SAM("-EINVAL\n");
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break;
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}
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case -EAGAIN: {
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SAM("-EAGAIN\n");
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break;
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}
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case -EFBIG: {
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SAM("-EFBIG\n");
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break;
|
|
}
|
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case -EPIPE: {
|
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SAM("-EPIPE\n");
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break;
|
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}
|
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case -EMSGSIZE: {
|
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SAM("-EMSGSIZE\n");
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break;
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}
|
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case -ENOSPC: {
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SAM("-ENOSPC\n");
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break;
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|
}
|
|
default: {
|
|
SAM("unknown error: 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.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
easysnd_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct usb_interface *pusb_interface;
|
|
struct easycap *peasycap;
|
|
int subminor, rc;
|
|
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
|
|
#if defined(EASYCAP_IS_VIDEODEV_CLIENT)
|
|
#if defined(EASYCAP_NEEDS_V4L2_DEVICE_H)
|
|
struct v4l2_device *pv4l2_device;
|
|
#endif /*EASYCAP_NEEDS_V4L2_DEVICE_H*/
|
|
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
|
|
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
|
|
|
|
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;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
#if (!defined(EASYCAP_IS_VIDEODEV_CLIENT))
|
|
#
|
|
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
|
|
#else
|
|
#if defined(EASYCAP_NEEDS_V4L2_DEVICE_H)
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* SOME VERSIONS OF THE videodev MODULE OVERWRITE THE DATA WHICH HAS
|
|
* BEEN WRITTEN BY THE CALL TO usb_set_intfdata() IN easycap_usb_probe(),
|
|
* REPLACING IT WITH A POINTER TO THE EMBEDDED v4l2_device STRUCTURE.
|
|
* TO DETECT THIS, THE STRING IN THE easycap.telltale[] BUFFER IS CHECKED.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
pv4l2_device = usb_get_intfdata(pusb_interface);
|
|
if ((struct v4l2_device *)NULL == pv4l2_device) {
|
|
SAY("ERROR: pv4l2_device is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
peasycap = (struct easycap *) \
|
|
container_of(pv4l2_device, struct easycap, v4l2_device);
|
|
}
|
|
#endif /*EASYCAP_NEEDS_V4L2_DEVICE_H*/
|
|
#
|
|
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
|
|
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
|
|
/*---------------------------------------------------------------------------*/
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap: 0x%08lX\n", (unsigned long int) peasycap);
|
|
return -EFAULT;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
file->private_data = peasycap;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* INITIALIZATION
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
JOM(4, "starting initialization\n");
|
|
|
|
if ((struct usb_device *)NULL == peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device is NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
JOM(16, "0x%08lX=peasycap->pusb_device\n", (long int)peasycap->pusb_device);
|
|
|
|
rc = audio_setup(peasycap);
|
|
if (0 <= rc)
|
|
JOM(8, "audio_setup() returned %i\n", rc);
|
|
else
|
|
JOM(8, "easysnd open(): ERROR: audio_setup() returned %i\n", rc);
|
|
|
|
if ((struct usb_device *)NULL == peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device has become NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
if ((struct usb_device *)NULL == peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device has become NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
rc = usb_set_interface(peasycap->pusb_device, peasycap->audio_interface, \
|
|
peasycap->audio_altsetting_on);
|
|
JOM(8, "usb_set_interface(.,%i,%i) returned %i\n", peasycap->audio_interface, \
|
|
peasycap->audio_altsetting_on, rc);
|
|
|
|
rc = wakeup_device(peasycap->pusb_device);
|
|
if (0 == rc)
|
|
JOM(8, "wakeup_device() returned %i\n", rc);
|
|
else
|
|
JOM(8, "ERROR: wakeup_device() returned %i\n", rc);
|
|
|
|
peasycap->audio_eof = 0;
|
|
peasycap->audio_idle = 0;
|
|
|
|
peasycap->timeval1.tv_sec = 0;
|
|
peasycap->timeval1.tv_usec = 0;
|
|
|
|
submit_audio_urbs(peasycap);
|
|
|
|
JOM(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 (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap: 0x%08lX\n", (unsigned long int) peasycap);
|
|
return -EFAULT;
|
|
}
|
|
if (0 != kill_audio_urbs(peasycap)) {
|
|
SAM("ERROR: kill_audio_urbs() failed\n");
|
|
return -EFAULT;
|
|
}
|
|
JOM(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;
|
|
long long int above, below, mean;
|
|
struct signed_div_result sdr;
|
|
unsigned char *p0;
|
|
long int kount1, more, rc, l0, lm;
|
|
int fragment, kd;
|
|
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));
|
|
|
|
if (NULL == file) {
|
|
SAY("ERROR: file is NULL\n");
|
|
return -ERESTARTSYS;
|
|
}
|
|
peasycap = file->private_data;
|
|
if (NULL == peasycap) {
|
|
SAY("ERROR in easysnd_read(): peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap: 0x%08lX\n", (unsigned long int) peasycap);
|
|
return -EFAULT;
|
|
}
|
|
if (NULL == peasycap->pusb_device) {
|
|
SAY("ERROR in easysnd_read(): peasycap->pusb_device is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
kd = isdongle(peasycap);
|
|
if (0 <= kd && DONGLE_MANY > kd) {
|
|
if (mutex_lock_interruptible(&(easycap_dongle[kd].mutex_audio))) {
|
|
SAY("ERROR: cannot lock easycap_dongle[%i].mutex_audio\n", kd);
|
|
return -ERESTARTSYS;
|
|
}
|
|
JOM(4, "locked easycap_dongle[%i].mutex_audio\n", kd);
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* MEANWHILE, easycap_usb_disconnect() MAY HAVE FREED POINTER peasycap,
|
|
* IN WHICH CASE A REPEAT CALL TO isdongle() WILL FAIL.
|
|
* IF NECESSARY, BAIL OUT.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
if (kd != isdongle(peasycap))
|
|
return -ERESTARTSYS;
|
|
if (NULL == file) {
|
|
SAY("ERROR: file is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -ERESTARTSYS;
|
|
}
|
|
peasycap = file->private_data;
|
|
if (NULL == peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -ERESTARTSYS;
|
|
}
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap: 0x%08lX\n", \
|
|
(unsigned long int) peasycap);
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -ERESTARTSYS;
|
|
}
|
|
if (NULL == peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -ERESTARTSYS;
|
|
}
|
|
} else {
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* IF easycap_usb_disconnect() HAS ALREADY FREED POINTER peasycap BEFORE THE
|
|
* ATTEMPT TO ACQUIRE THE SEMAPHORE, isdongle() WILL HAVE FAILED. BAIL OUT.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
return -ERESTARTSYS;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
if (file->f_flags & O_NONBLOCK)
|
|
JOT(16, "NONBLOCK kount=%i, *poff=%i\n", (int)kount, (int)(*poff));
|
|
else
|
|
JOT(8, "BLOCKING kount=%i, *poff=%i\n", (int)kount, (int)(*poff));
|
|
|
|
if ((0 > peasycap->audio_read) || \
|
|
(peasycap->audio_buffer_page_many <= peasycap->audio_read)) {
|
|
SAM("ERROR: peasycap->audio_read out of range\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
pdata_buffer = &peasycap->audio_buffer[peasycap->audio_read];
|
|
if ((struct data_buffer *)NULL == pdata_buffer) {
|
|
SAM("ERROR: pdata_buffer is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
JOM(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) {
|
|
JOM(16, "returning -EAGAIN as instructed\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
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) {
|
|
SAM("aborted by signal\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -ERESTARTSYS;
|
|
}
|
|
if (peasycap->audio_eof) {
|
|
JOM(8, "returning 0 because %i=audio_eof\n", \
|
|
peasycap->audio_eof);
|
|
kill_audio_urbs(peasycap);
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return 0;
|
|
}
|
|
if (peasycap->audio_idle) {
|
|
JOM(16, "returning 0 because %i=audio_idle\n", \
|
|
peasycap->audio_idle);
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return 0;
|
|
}
|
|
if (!peasycap->audio_isoc_streaming) {
|
|
JOM(16, "returning 0 because audio urbs not streaming\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return 0;
|
|
}
|
|
}
|
|
JOM(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) {
|
|
SAM("ERROR: pdata_buffer->pgo is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
if (NULL == pdata_buffer->pto) {
|
|
SAM("ERROR: pdata_buffer->pto is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
kount1 = PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo);
|
|
if (0 > kount1) {
|
|
SAM("easysnd_read: MISTAKE: kount1 is negative\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -ERESTARTSYS;
|
|
}
|
|
if (!kount1) {
|
|
(peasycap->audio_read)++;
|
|
if (peasycap->audio_buffer_page_many <= peasycap->audio_read)
|
|
peasycap->audio_read = 0;
|
|
JOM(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)) {
|
|
SAM("ERROR: peasycap->audio_read out of range\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
pdata_buffer = &peasycap->audio_buffer[peasycap->audio_read];
|
|
if ((struct data_buffer *)NULL == pdata_buffer) {
|
|
SAM("ERROR: pdata_buffer is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
if (NULL == pdata_buffer->pgo) {
|
|
SAM("ERROR: pdata_buffer->pgo is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
if (NULL == pdata_buffer->pto) {
|
|
SAM("ERROR: pdata_buffer->pto is NULL\n");
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
kount1 = PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo);
|
|
}
|
|
JOM(12, "ready to send %li bytes\n", (long int) kount1);
|
|
JOM(12, "still to send %li bytes\n", (long int) kount);
|
|
more = kount1;
|
|
if (more > kount)
|
|
more = kount;
|
|
JOM(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) {
|
|
SAM("ERROR: copy_to_user() returned %li\n", rc);
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
return -EFAULT;
|
|
}
|
|
*poff += (loff_t)more;
|
|
szret += (size_t)more;
|
|
pdata_buffer->pto += more;
|
|
puserspacebuffer += more;
|
|
kount -= (size_t)more;
|
|
}
|
|
JOM(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) {
|
|
SAM("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);
|
|
|
|
JOM(8, "%8lli=mean %8lli=meansquare after %lli samples, =>\n", \
|
|
sdr.quotient, above, peasycap->audio_sample);
|
|
|
|
sdr = signed_div(above, 32768);
|
|
JOM(8, "audio dynamic range is roughly %lli\n", sdr.quotient);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* UPDATE THE AUDIO CLOCK
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
do_gettimeofday(&timeval);
|
|
if (!peasycap->timeval1.tv_sec) {
|
|
peasycap->audio_bytes = 0;
|
|
peasycap->timeval3 = timeval;
|
|
peasycap->timeval1 = peasycap->timeval3;
|
|
sdr.quotient = 192000;
|
|
} else {
|
|
peasycap->audio_bytes += (long long int) szret;
|
|
below = ((long long int)(1000000)) * \
|
|
((long long int)(timeval.tv_sec - \
|
|
peasycap->timeval3.tv_sec)) + \
|
|
(long long int)(timeval.tv_usec - peasycap->timeval3.tv_usec);
|
|
above = 1000000 * ((long long int) peasycap->audio_bytes);
|
|
|
|
if (below)
|
|
sdr = signed_div(above, below);
|
|
else
|
|
sdr.quotient = 192000;
|
|
}
|
|
JOM(8, "audio streaming at %lli bytes/second\n", sdr.quotient);
|
|
peasycap->dnbydt = sdr.quotient;
|
|
|
|
JOM(8, "returning %li\n", (long int)szret);
|
|
mutex_unlock(&easycap_dongle[kd].mutex_audio);
|
|
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, nospc, m, rc;
|
|
int isbuf;
|
|
|
|
if (NULL == peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if ((struct list_head *)NULL == peasycap->purb_audio_head) {
|
|
SAM("ERROR: peasycap->urb_audio_head uninitialized\n");
|
|
return -EFAULT;
|
|
}
|
|
if ((struct usb_device *)NULL == peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if (!peasycap->audio_isoc_streaming) {
|
|
JOM(4, "initial submission of all audio urbs\n");
|
|
rc = usb_set_interface(peasycap->pusb_device,
|
|
peasycap->audio_interface, \
|
|
peasycap->audio_altsetting_on);
|
|
JOM(8, "usb_set_interface(.,%i,%i) returned %i\n", \
|
|
peasycap->audio_interface, \
|
|
peasycap->audio_altsetting_on, rc);
|
|
|
|
isbad = 0; nospc = 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++;
|
|
SAM("ERROR: usb_submit_urb() failed" \
|
|
" for urb with rc:\n");
|
|
switch (rc) {
|
|
case -ENOMEM: {
|
|
SAM("-ENOMEM\n");
|
|
break;
|
|
}
|
|
case -ENODEV: {
|
|
SAM("-ENODEV\n");
|
|
break;
|
|
}
|
|
case -ENXIO: {
|
|
SAM("-ENXIO\n");
|
|
break;
|
|
}
|
|
case -EINVAL: {
|
|
SAM("-EINVAL\n");
|
|
break;
|
|
}
|
|
case -EAGAIN: {
|
|
SAM("-EAGAIN\n");
|
|
break;
|
|
}
|
|
case -EFBIG: {
|
|
SAM("-EFBIG\n");
|
|
break;
|
|
}
|
|
case -EPIPE: {
|
|
SAM("-EPIPE\n");
|
|
break;
|
|
}
|
|
case -EMSGSIZE: {
|
|
SAM("-EMSGSIZE\n");
|
|
break;
|
|
}
|
|
case -ENOSPC: {
|
|
nospc++;
|
|
break;
|
|
}
|
|
default: {
|
|
SAM("unknown error code %i\n",\
|
|
rc);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
m++;
|
|
}
|
|
} else {
|
|
isbad++;
|
|
}
|
|
} else {
|
|
isbad++;
|
|
}
|
|
}
|
|
if (nospc) {
|
|
SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc);
|
|
SAM("..... possibly inadequate USB bandwidth\n");
|
|
peasycap->audio_eof = 1;
|
|
}
|
|
if (isbad) {
|
|
JOM(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;
|
|
JOM(4, "submitted %i audio urbs\n", m);
|
|
}
|
|
} else
|
|
JOM(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 (NULL == peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if (peasycap->audio_isoc_streaming) {
|
|
if ((struct list_head *)NULL != peasycap->purb_audio_head) {
|
|
peasycap->audio_isoc_streaming = 0;
|
|
JOM(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++;
|
|
}
|
|
}
|
|
}
|
|
JOM(4, "%i audio urbs killed\n", m);
|
|
} else {
|
|
SAM("ERROR: peasycap->purb_audio_head is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
JOM(8, "%i=audio_isoc_streaming, no audio urbs killed\n", \
|
|
peasycap->audio_isoc_streaming);
|
|
}
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|