source: mediastreamer2/src/msqueue.c @ 856:3d8054c9c0b4

/*
mediastreamer2 library - modular sound and video processing and streaming
Copyright (C) 2006  Simon MORLAT (simon.morlat@linphone.org)

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 "mediastreamer2/msqueue.h"
#include "mediastreamer2/mscommon.h"
#include "mediastreamer2/msvideo.h"
#include <string.h>

MSQueue * ms_queue_new(struct _MSFilter *f1, int pin1, struct _MSFilter *f2, int pin2 ){
        MSQueue *q=(MSQueue*)ms_new(MSQueue,1);
        qinit(&q->q);
        q->prev.filter=f1;
        q->prev.pin=pin1;
        q->next.filter=f2;
        q->next.pin=pin2;
        return q;
}

void ms_queue_init(MSQueue *q){
        q->prev.filter=0;
        q->prev.pin=0;
        q->next.filter=0;
        q->next.pin=0;
        qinit(&q->q);
}

void ms_queue_destroy(MSQueue *q){
        flushq(&q->q,0);
        ms_free(q);
}

void ms_queue_flush(MSQueue *q){
        flushq(&q->q,0);
}


void ms_bufferizer_init(MSBufferizer *obj){
        qinit(&obj->q);
        obj->size=0;
}

MSBufferizer * ms_bufferizer_new(){
        MSBufferizer *obj=(MSBufferizer *)ms_new(MSBufferizer,1);
        ms_bufferizer_init(obj);
        return obj;
}

void ms_bufferizer_put(MSBufferizer *obj, mblk_t *m){
        obj->size+=msgdsize(m);
        putq(&obj->q,m);
}

void ms_bufferizer_put_from_queue(MSBufferizer *obj, MSQueue *q){
        mblk_t *m;
        while((m=ms_queue_get(q))!=NULL){
                ms_bufferizer_put(obj,m);
        }
}

int ms_bufferizer_read(MSBufferizer *obj, uint8_t *data, int datalen){
        if (obj->size>=datalen){
                int sz=0;
                int cplen;
                mblk_t *m=peekq(&obj->q);
                /*we can return something */
                while(sz<datalen){
                        cplen=MIN(m->b_wptr-m->b_rptr,datalen-sz);
                        memcpy(data+sz,m->b_rptr,cplen);
                        sz+=cplen;
                        m->b_rptr+=cplen;
                        if (m->b_rptr==m->b_wptr){
                                /* check cont */
                                if (m->b_cont!=NULL) {
                                        m=m->b_cont;
                                }
                                else{
                                        mblk_t *remove=getq(&obj->q);
                                        freemsg(remove);
                                        m=peekq(&obj->q);
                                }
                        }
                }
                obj->size-=datalen;
                return datalen;
        }
        return 0;
}

void ms_bufferizer_flush(MSBufferizer *obj){
        obj->size=0;
        flushq(&obj->q,0);
}

void ms_bufferizer_uninit(MSBufferizer *obj){
        flushq(&obj->q,0);
}

void ms_bufferizer_destroy(MSBufferizer *obj){
        ms_bufferizer_uninit(obj);
        ms_free(obj);
}