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/* $Id: converter.c 4087 2012-04-26 03:39:24Z ming $ */
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* Copyright (C) 2010-2011 Teluu Inc. (http://www.teluu.com)
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* This program 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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* 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 <pjmedia/converter.h>
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#include <pj/assert.h>
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#define THIS_FILE "converter.c"
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struct pjmedia_converter_mgr
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pjmedia_converter_factory factory_list;
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static pjmedia_converter_mgr *converter_manager_instance;
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#if PJMEDIA_HAS_LIBSWSCALE && PJMEDIA_HAS_LIBAVUTIL
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pjmedia_libswscale_converter_init(pjmedia_converter_mgr *mgr);
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PJ_DEF(pj_status_t) pjmedia_converter_mgr_create(pj_pool_t *pool,
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pjmedia_converter_mgr **p_mgr)
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pjmedia_converter_mgr *mgr;
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pj_status_t status = PJ_SUCCESS;
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mgr = PJ_POOL_ALLOC_T(pool, pjmedia_converter_mgr);
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pj_list_init(&mgr->factory_list);
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if (!converter_manager_instance)
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converter_manager_instance = mgr;
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#if PJMEDIA_HAS_LIBSWSCALE && PJMEDIA_HAS_LIBAVUTIL
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status = pjmedia_libswscale_converter_init(mgr);
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if (status != PJ_SUCCESS) {
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PJ_PERROR(4,(THIS_FILE, status,
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"Error initializing libswscale converter"));
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PJ_DEF(pjmedia_converter_mgr*) pjmedia_converter_mgr_instance(void)
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pj_assert(converter_manager_instance != NULL);
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return converter_manager_instance;
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PJ_DEF(void) pjmedia_converter_mgr_set_instance(pjmedia_converter_mgr *mgr)
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converter_manager_instance = mgr;
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PJ_DEF(void) pjmedia_converter_mgr_destroy(pjmedia_converter_mgr *mgr)
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pjmedia_converter_factory *f;
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if (!mgr) mgr = pjmedia_converter_mgr_instance();
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PJ_ASSERT_ON_FAIL(mgr != NULL, return);
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f = mgr->factory_list.next;
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while (f != &mgr->factory_list) {
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pjmedia_converter_factory *next = f->next;
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(*f->op->destroy_factory)(f);
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if (converter_manager_instance == mgr)
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converter_manager_instance = NULL;
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pjmedia_converter_mgr_register_factory(pjmedia_converter_mgr *mgr,
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pjmedia_converter_factory *factory)
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pjmedia_converter_factory *pf;
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if (!mgr) mgr = pjmedia_converter_mgr_instance();
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PJ_ASSERT_RETURN(mgr != NULL, PJ_EINVAL);
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PJ_ASSERT_RETURN(!pj_list_find_node(&mgr->factory_list, factory),
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pf = mgr->factory_list.next;
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while (pf != &mgr->factory_list) {
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if (pf->priority > factory->priority)
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pj_list_insert_before(pf, factory);
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pjmedia_converter_mgr_unregister_factory(pjmedia_converter_mgr *mgr,
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pjmedia_converter_factory *f,
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if (!mgr) mgr = pjmedia_converter_mgr_instance();
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PJ_ASSERT_RETURN(mgr != NULL, PJ_EINVAL);
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PJ_ASSERT_RETURN(pj_list_find_node(&mgr->factory_list, f), PJ_ENOTFOUND);
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(*f->op->destroy_factory)(f);
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PJ_DEF(pj_status_t) pjmedia_converter_create(pjmedia_converter_mgr *mgr,
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pjmedia_conversion_param *param,
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pjmedia_converter **p_cv)
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pjmedia_converter_factory *f;
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pjmedia_converter *cv = NULL;
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pj_status_t status = PJ_ENOTFOUND;
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if (!mgr) mgr = pjmedia_converter_mgr_instance();
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PJ_ASSERT_RETURN(mgr != NULL, PJ_EINVAL);
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f = mgr->factory_list.next;
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while (f != &mgr->factory_list) {
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status = (*f->op->create_converter)(f, pool, param, &cv);
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if (status == PJ_SUCCESS)
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if (status != PJ_SUCCESS)
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PJ_DEF(pj_status_t) pjmedia_converter_convert(pjmedia_converter *cv,
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pjmedia_frame *src_frame,
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pjmedia_frame *dst_frame)
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return (*cv->op->convert)(cv, src_frame, dst_frame);
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PJ_DEF(void) pjmedia_converter_destroy(pjmedia_converter *cv)
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(*cv->op->destroy)(cv);