Added generic buffer and queue implementation for audio buffering
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89679e710a
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64
protocols/vnc/include/buffer.h
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64
protocols/vnc/include/buffer.h
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is buffer.
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*
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* The Initial Developers of the Original Code are
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* Craig Hokanson <craig.hokanson@sv.cmu.edu>
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* Sion Chaudhuri <sion.chaudhuri@sv.cmu.edu>
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* Gio Perez <gio.perez@sv.cmu.edu>
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*
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* Portions created by the Initial Developer are Copyright (C) 2013
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* the Initial Developers. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef __GUAC_VNC_BUFFER_H
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#define __GUAC_VNC_BUFFER_H
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#include <pthread.h>
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#include <guacamole/client.h>
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#include "queue.h"
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typedef struct {
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queue data_queue;
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pthread_mutex_t update_lock;
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pthread_cond_t cond;
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} buffer;
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void buffer_init(buffer* buf, int size_of_data);
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void buffer_free(buffer* buf);
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void buffer_close(buffer* buf);
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void buffer_insert(buffer* buf, void* data, int size_of_data);
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void buffer_remove(buffer* buf, void* data, int size_of_data, guac_client* client);
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#endif
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42
protocols/vnc/include/queue.h
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42
protocols/vnc/include/queue.h
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/* ***** BEGIN LICENSE BLOCK *****
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* queue.c
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*
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* Implementation of a FIFO queue abstract data type.
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*
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* by: Steven Skiena
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* begun: March 27, 2002
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*
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* Copyright 2003 by Steven S. Skiena; all rights reserved.
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*
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* Permission is granted for use in non-commerical applications
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* provided this copyright notice remains intact and unchanged.
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*
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* Modified for the Guacamole project by:
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* Craig Hokanson <craig.hokanson@sv.cmu.edu>
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* Sion Chaudhuri <sion.chaudhuri@sv.cmu.edu>
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* Gio Perez <gio.perez@sv.cmu.edu>
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef __GUAC_VNC_QUEUE_H
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#define __GUAC_VNC_QUEUE_H
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#define QUEUESIZE 200
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typedef struct {
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void* items[QUEUESIZE+1]; /* body of queue */
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int first; /* position of first element */
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int last; /* position of last element */
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int count; /* number of queue elements */
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} queue;
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void queue_init(queue* q, int size_of_element);
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void queue_free(queue* q);
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int enqueue(queue* q, void* data, int size);
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int dequeue(queue* q, void* data, int size);
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#endif
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86
protocols/vnc/src/buffer.c
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86
protocols/vnc/src/buffer.c
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is buffer.
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*
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* The Initial Developers of the Original Code are
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* Craig Hokanson <craig.hokanson@sv.cmu.edu>
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* Sion Chaudhuri <sion.chaudhuri@sv.cmu.edu>
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* Gio Perez <gio.perez@sv.cmu.edu>
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*
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* Portions created by the Initial Developer are Copyright (C) 2013
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* the Initial Developers. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
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#include <string.h>
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#include "buffer.h"
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#include "queue.h"
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void buffer_init(buffer* buf, int size_of_data) {
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queue_init(&(buf->data_queue), size_of_data);
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}
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void buffer_free(buffer* buf) {
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queue_free(&(buf->data_queue));
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}
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void buffer_close(buffer* buf) {
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pthread_cond_signal(&(buf->cond));
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}
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void buffer_insert(buffer* buf, void* data, int size_of_data) {
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pthread_mutex_lock(&(buf->update_lock));
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enqueue(&(buf->data_queue), data, size_of_data);
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pthread_mutex_unlock(&(buf->update_lock));
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pthread_cond_signal(&(buf->cond));
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}
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void buffer_remove(buffer* buf, void* data, int size_of_data, guac_client* client) {
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pthread_mutex_lock(&(buf->update_lock));
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if((buf->data_queue).count <= 0)
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pthread_cond_wait(&(buf->cond), &(buf->update_lock));
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/* If the thread was signaled during a close,
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the queue might still be empty */
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if((buf->data_queue).count > 0)
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dequeue(&(buf->data_queue), data, size_of_data);
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pthread_mutex_unlock(&(buf->update_lock));
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}
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71
protocols/vnc/src/queue.c
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71
protocols/vnc/src/queue.c
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@ -0,0 +1,71 @@
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/* ***** BEGIN LICENSE BLOCK *****
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* queue.c
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*
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* Implementation of a FIFO queue abstract data type.
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*
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* by: Steven Skiena
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* begun: March 27, 2002
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*
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* Copyright 2003 by Steven S. Skiena; all rights reserved.
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*
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* Permission is granted for use in non-commerical applications
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* provided this copyright notice remains intact and unchanged.
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*
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* Modified for the Guacamole project by:
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* Craig Hokanson <craig.hokanson@sv.cmu.edu>
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* Sion Chaudhuri <sion.chaudhuri@sv.cmu.edu>
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* Gio Perez <gio.perez@sv.cmu.edu>
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*
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* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
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#include <string.h>
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#include "queue.h"
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void queue_init(queue* q, int size_of_element) {
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int i;
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q->first = 0;
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q->last = QUEUESIZE-1;
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q->count = 0;
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for(i = 0; i < QUEUESIZE; i++)
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q->items[i] = malloc(size_of_element);
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}
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void queue_free(queue* q) {
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int i;
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for(i = 0; i < QUEUESIZE; i++)
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free(q->items[i]);
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}
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int enqueue(queue* q, void* data, int size) {
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if (q->count >= QUEUESIZE)
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return -1;
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q->last = (q->last+1) % QUEUESIZE;
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memcpy(q->items[ q->last ], data, size);
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q->count = q->count + 1;
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return 0;
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}
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int dequeue(queue* q, void* data, int size) {
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if (q->count <= 0)
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return -1;
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memcpy(data, q->items[ q->first ], size);
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q->first = (q->first+1) % QUEUESIZE;
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q->count = q->count - 1;
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return 0;
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}
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