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/*******************************************************************************#
# guvcview http://guvcview.sourceforge.net #
# #
# Paulo Assis <pj.assis@gmail.com> #
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either version 2 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #
# #
********************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
/* support for internationalization - i18n */
#include <locale.h>
#include <libintl.h>
#include "../config.h"
#include "gviewencoder.h"
#include "encoder.h"
#include "stream_io.h"
#include "gview.h"
/*
* get last stream of the list (list tail)
* args:
* stream_list - pointer to stream list
*
* asserts:
* none
*
* returns: pointer to last stream of the list
* or NULL if none
*/
stream_io_t *get_last_stream(stream_io_t *stream_list)
{
stream_io_t *stream = stream_list;
if(!stream)
return NULL;
while(stream->next != NULL)
stream = stream->next;
return stream;
}
/*
* add a new stream to the list
* args:
* stream_list - pointer to pointer of stream_list
* list_size - pointer to list size
*
* asserts:
* none
*
* returns: pointer to newly allocated stream
*/
stream_io_t *add_new_stream(stream_io_t **stream_list, int *list_size)
{
stream_io_t *stream = calloc(1, sizeof(stream_io_t));
if (stream == NULL)
{
fprintf(stderr, "ENCODER: FATAL memory allocation failure (add_new_stream): %s\n", strerror(errno));
exit(-1);
}
stream->next = NULL;
stream->id = *list_size;
fprintf(stderr, "ENCODER: add stream %i to stream list\n", stream->id);
stream_io_t *last_stream = get_last_stream(*stream_list);
stream->previous = last_stream;
if(last_stream)
last_stream->next = stream;
else
*stream_list = stream; /*first stream*/
stream->indexes = NULL;
*list_size = *list_size + 1;
return(stream);
}
/*
* destroy the sream list (free all streams)
* args:
* stream_list - pointer to stream list
* list_size - pointer to list size
*
* asserts:
* none
*
* returns: none
*/
void destroy_stream_list(stream_io_t *stream_list, int *list_size)
{
stream_io_t *stream = get_last_stream(stream_list);
while(stream != NULL) //from end to start
{
stream_io_t *prev_stream = stream->previous;
if(stream->indexes != NULL)
free(stream->indexes);
free(stream);
stream = prev_stream;
*list_size = *list_size - 1;
}
}
/*
* get stream with index from list
* args:
* stream_list - pointer to pointer of stream_list
* index - stream index in the list
*
* asserts:
* none
*
* returns: pointer to stream
*/
stream_io_t *get_stream(stream_io_t *stream_list, int index)
{
stream_io_t *stream = stream_list;
if(!stream)
return NULL;
int j = 0;
while(stream->next != NULL && (j < index))
{
stream = stream->next;
j++;
}
if(j != index)
return NULL;
return stream;
}
/*
* get first video stream
* args:
* stream_list - pointer to stream list
*
* asserts:
* none
*
* returns: pointer to stream
*/
stream_io_t *get_first_video_stream(stream_io_t *stream_list)
{
stream_io_t *stream = stream_list;
while(stream != NULL)
{
if(stream->type == STREAM_TYPE_VIDEO)
return stream;
stream = stream->next;
}
return NULL;
}
/*
* get first audio stream
* args:
* stream_list - pointer to stream list
*
* asserts:
* none
*
* returns: pointer to stream
*/
//stream_io_t *get_first_audio_stream(stream_io_t *stream_list)
//{
// stream_io_t *stream = stream_list;
//
// while(stream != NULL)
// {
// if(stream->type == STREAM_TYPE_AUDIO)
// return stream;
//
// stream = stream->next;
// }
//
// return NULL;
//}
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