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mediastreamer2 library - modular sound and video processing and streaming
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Copyright (C) 2006 Simon MORLAT (simon.morlat@linphone.org)
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; 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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#include "mediastreamer2/msfilter.h"
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#include "mediastreamer2/mscommon.h"
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static MSList *desc_list=NULL;
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void ms_filter_register(MSFilterDesc *desc){
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if (desc->id==MS_FILTER_NOT_SET_ID){
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ms_fatal("MSFilterId for %s not set !",desc->name);
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desc_list=ms_list_append(desc_list,desc);
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void ms_filter_unregister_all(){
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if (desc_list!=NULL) ms_list_free(desc_list);
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bool_t ms_filter_codec_supported(const char *mime){
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if (ms_filter_get_encoder(mime)!=NULL
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&& ms_filter_get_decoder(mime)!=NULL) return TRUE;
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MSFilterDesc * ms_filter_get_encoder(const char *mime){
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for (elem=desc_list;elem!=NULL;elem=ms_list_next(elem)){
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MSFilterDesc *desc=(MSFilterDesc*)elem->data;
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if (desc->category==MS_FILTER_ENCODER &&
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strcasecmp(desc->enc_fmt,mime)==0){
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MSFilterDesc * ms_filter_get_decoder(const char *mime){
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for (elem=desc_list;elem!=NULL;elem=ms_list_next(elem)){
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MSFilterDesc *desc=(MSFilterDesc*)elem->data;
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if (desc->category==MS_FILTER_DECODER &&
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strcasecmp(desc->enc_fmt,mime)==0){
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MSFilter * ms_filter_create_encoder(const char *mime){
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MSFilterDesc *desc=ms_filter_get_encoder(mime);
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if (desc!=NULL) return ms_filter_new_from_desc(desc);
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MSFilter * ms_filter_create_decoder(const char *mime){
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MSFilterDesc *desc=ms_filter_get_decoder(mime);
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if (desc!=NULL) return ms_filter_new_from_desc(desc);
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MSFilter *ms_filter_new_from_desc(MSFilterDesc *desc){
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obj=ms_new0(MSFilter,1);
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ms_mutex_init(&obj->lock,NULL);
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if (desc->ninputs>0) obj->inputs=ms_new0(MSQueue*,desc->ninputs);
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if (desc->noutputs>0) obj->outputs=ms_new0(MSQueue*,desc->noutputs);
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if (desc->ninputs==0 && desc->noutputs==0)
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ms_fatal("A filter cannot have no inputs and outputs");
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if (obj->desc->init!=NULL)
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MSFilter *ms_filter_new(MSFilterId id){
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if (id==MS_FILTER_PLUGIN_ID){
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ms_warning("cannot create plugin filters with ms_filter_new_from_id()");
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for (elem=desc_list;elem!=NULL;elem=ms_list_next(elem)){
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MSFilterDesc *desc=(MSFilterDesc*)elem->data;
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return ms_filter_new_from_desc(desc);
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ms_error("No such filter with id %i",id);
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MSFilterId ms_filter_get_id(MSFilter *f){
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int ms_filter_link(MSFilter *f1, int pin1, MSFilter *f2, int pin2){
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ms_return_val_if_fail(pin1<f1->desc->noutputs, -1);
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ms_return_val_if_fail(pin2<f2->desc->ninputs, -1);
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ms_return_val_if_fail(f1->outputs[pin1]==NULL,-1);
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ms_return_val_if_fail(f2->inputs[pin2]==NULL,-1);
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q=ms_queue_new(f1,pin1,f2,pin2);
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ms_message("ms_filter_link: %s:%p,%i-->%s:%p,%i",f1->desc->name,f1,pin1,f2->desc->name,f2,pin2);
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int ms_filter_unlink(MSFilter *f1, int pin1, MSFilter *f2, int pin2){
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ms_return_val_if_fail(pin1<f1->desc->noutputs, -1);
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ms_return_val_if_fail(pin2<f2->desc->ninputs, -1);
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ms_return_val_if_fail(f1->outputs[pin1]!=NULL,-1);
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ms_return_val_if_fail(f2->inputs[pin2]!=NULL,-1);
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ms_return_val_if_fail(f1->outputs[pin1]==f2->inputs[pin2],-1);
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f1->outputs[pin1]=f2->inputs[pin2]=0;
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ms_message("ms_filter_unlink: %s:%p,%i-->%s:%p,%i",f1->desc->name,f1,pin1,f2->desc->name,f2,pin2);
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#define MS_FILTER_METHOD_GET_FID(id) (((id)>>16) & 0xFFFF)
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int ms_filter_call_method(MSFilter *f, unsigned int id, void *arg){
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MSFilterMethod *methods=f->desc->methods;
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unsigned int magic=MS_FILTER_METHOD_GET_FID(id);
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if (magic!=MS_FILTER_BASE_ID && magic!=f->desc->id) {
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ms_fatal("Bad method definition in filter %s",f->desc->name);
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for(i=0;methods!=NULL && methods[i].method!=NULL; i++){
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unsigned int mm=MS_FILTER_METHOD_GET_FID(methods[i].id);
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if (mm!=f->desc->id && mm!=MS_FILTER_BASE_ID) {
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ms_fatal("MSFilter method mismatch: bad call.");
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if (methods[i].id==id){
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return methods[i].method(f,arg);
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if (magic!=MS_FILTER_BASE_ID) ms_error("no such method on filter %s",f->desc->name);
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int ms_filter_call_method_noarg(MSFilter *f, unsigned int id){
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return ms_filter_call_method(f,id,NULL);
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void ms_filter_set_notify_callback(MSFilter *f, MSFilterNotifyFunc fn, void *ud){
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void ms_filter_destroy(MSFilter *f){
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if (f->desc->uninit!=NULL)
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if (f->inputs!=NULL) ms_free(f->inputs);
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if (f->outputs!=NULL) ms_free(f->outputs);
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ms_mutex_destroy(&f->lock);
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void ms_filter_process(MSFilter *f){
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ms_debug("Executing process of filter %s:%p",f->desc->name,f);
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void ms_filter_preprocess(MSFilter *f, struct _MSTicker *t){
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if (f->desc->preprocess!=NULL)
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f->desc->preprocess(f);
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void ms_filter_postprocess(MSFilter *f){
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if (f->desc->postprocess!=NULL)
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f->desc->postprocess(f);
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bool_t ms_filter_inputs_have_data(MSFilter *f){
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for(i=0;i<f->desc->ninputs;i++){
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MSQueue *q=f->inputs[i];
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if (q!=NULL && q->q.q_mcount>0) return TRUE;
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void ms_filter_notify(MSFilter *f, unsigned int id, void *arg){
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f->notify(f->notify_ud,id,arg);
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void ms_filter_notify_no_arg(MSFilter *f, unsigned int id){
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f->notify(f->notify_ud,id,NULL);