root/modules/ogg/ogg_load.c

DEFINITIONS

1. OGG_CanHandleStream
2. OGG_LoadDecoder
3. DeleteOGGDecoder
4. QueryInterfaces
5. LoadInterface
6. ShutdownInterface

/*
 *                      GPAC - Multimedia Framework C SDK
 *
 *                      Authors: Jean Le Feuvre
 *                      Copyright (c) Telecom ParisTech 2000-2012
 *                                      All rights reserved
 *
 *  This file is part of GPAC / XIPH.org module
 *
 *  GPAC is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  GPAC 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "ogg_in.h"


#if !defined(__GNUC__)
# if (defined(_WIN32_WCE) || defined (WIN32))
#  pragma comment(lib, "libogg_static")
#  pragma comment(lib, "libvorbis_static")
#  pragma comment(lib, "libtheora_static")
# endif
#endif


static u32 OGG_CanHandleStream(GF_BaseDecoder *dec, u32 StreamType, GF_ESD *esd, u8 PL)
{
        /*media type query*/
        if (!esd) return ((StreamType == GF_STREAM_VISUAL) || (StreamType == GF_STREAM_AUDIO)) ? GF_CODEC_STREAM_TYPE_SUPPORTED : GF_CODEC_NOT_SUPPORTED;
        /*video decs*/
        if (StreamType == GF_STREAM_VISUAL) {
#ifdef GPAC_HAS_THEORA
                char *dsi = esd->decoderConfig->decoderSpecificInfo ? esd->decoderConfig->decoderSpecificInfo->data : NULL;
#endif
                switch (esd->decoderConfig->objectTypeIndication) {
#ifdef GPAC_HAS_THEORA
                case GPAC_OTI_MEDIA_OGG:
                        if (dsi && (esd->decoderConfig->decoderSpecificInfo->dataLength>=9)  && !strncmp((char *) &dsi[3], "theora", 6)) {
                                if (NewTheoraDecoder(dec)) return GF_CODEC_SUPPORTED;
                        }
                        return GF_CODEC_NOT_SUPPORTED;
#endif
                default:
                        return GF_CODEC_NOT_SUPPORTED;
                }
        }
        /*audio decs*/
        if (StreamType == GF_STREAM_AUDIO) {
#ifdef GPAC_HAS_VORBIS
                char *dsi = esd->decoderConfig->decoderSpecificInfo ? esd->decoderConfig->decoderSpecificInfo->data : NULL;
#endif
                switch (esd->decoderConfig->objectTypeIndication) {
#ifdef GPAC_HAS_VORBIS
                case GPAC_OTI_MEDIA_OGG:
                        if (dsi && (esd->decoderConfig->decoderSpecificInfo->dataLength>=9)  && !strncmp((char *) &dsi[3], "vorbis", 6)) {
                                if (NewVorbisDecoder(dec)) return GF_CODEC_SUPPORTED;
                        }
                        return GF_CODEC_NOT_SUPPORTED;
#endif
                default:
                        return GF_CODEC_NOT_SUPPORTED;
                }
        }
        return GF_CODEC_NOT_SUPPORTED;
}


GF_BaseDecoder *OGG_LoadDecoder()
{
        GF_MediaDecoder *ifce;
        OGGWraper *wrap;
        GF_SAFEALLOC(ifce, GF_MediaDecoder);
        if (!ifce) return NULL;
        GF_SAFEALLOC(wrap, OGGWraper);
        if (!wrap) {
                gf_free(ifce);
                return NULL;
        }
        ifce->privateStack = wrap;
        ifce->CanHandleStream = OGG_CanHandleStream;
        GF_REGISTER_MODULE_INTERFACE(ifce, GF_MEDIA_DECODER_INTERFACE, "GPAC XIPH.org package", "gpac distribution")

        /*other interfaces will be setup at run time*/
        return (GF_BaseDecoder *)ifce;
}

void DeleteOGGDecoder(GF_BaseDecoder *ifcd)
{
        OGGWraper *wrap;
        if (!ifcd)
                return;
        wrap = (OGGWraper *)ifcd->privateStack;
        if (wrap) {
                switch (wrap->type) {
#ifdef GPAC_HAS_VORBIS
                case OGG_VORBIS:
                        DeleteVorbisDecoder(ifcd);
                        break;
#endif
#ifdef GPAC_HAS_THEORA
                case OGG_THEORA:
                        DeleteTheoraDecoder(ifcd);
                        break;
#endif
                default:
                        break;
                }
                gf_free(wrap);
                ifcd->privateStack = NULL;
        }
        gf_free(ifcd);
}


GPAC_MODULE_EXPORT
const u32 *QueryInterfaces()
{
        static u32 si [] = {
#if !defined(GPAC_DISABLE_AV_PARSERS) && !defined(GPAC_DISABLE_OGG)
                GF_NET_CLIENT_INTERFACE,
#endif
                GF_MEDIA_DECODER_INTERFACE,
                0
        };
        return si;
}

GPAC_MODULE_EXPORT
GF_BaseInterface *LoadInterface(u32 InterfaceType)
{
#if !defined(GPAC_DISABLE_AV_PARSERS) && !defined(GPAC_DISABLE_OGG)
        if (InterfaceType == GF_NET_CLIENT_INTERFACE) return (GF_BaseInterface *)OGG_LoadDemux();
#endif
        if (InterfaceType == GF_MEDIA_DECODER_INTERFACE) return (GF_BaseInterface *)OGG_LoadDecoder();
        return NULL;
}

GPAC_MODULE_EXPORT
void ShutdownInterface(GF_BaseInterface *ifce)
{
        switch (ifce->InterfaceType) {
#if !defined(GPAC_DISABLE_AV_PARSERS) && !defined(GPAC_DISABLE_OGG)
        case GF_NET_CLIENT_INTERFACE:
                OGG_DeleteDemux(ifce);
                break;
#endif
        case GF_MEDIA_DECODER_INTERFACE:
                DeleteOGGDecoder((GF_BaseDecoder *) ifce);
                break;
        }
}

GPAC_MODULE_STATIC_DECLARATION( ogg_in )