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323 lines
11 KiB
323 lines
11 KiB
/***************************************************************************
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* Copyright (C) 2004 by Jean-Baptiste Mardelle *
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* bj@altern.org *
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* *
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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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* *
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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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* *
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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 *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include <tqfile.h>
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#include <config.h>
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#include "kfile_theora.h"
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#include <kdebug.h>
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#include <klocale.h>
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#include <kgenericfactory.h>
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#include "theora/theora.h"
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#include "vorbis/codec.h"
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ogg_stream_state t_stream_state;
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ogg_stream_state v_stream_state;
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int theora_p=0;
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int vorbis_p=0;
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static int queue_page(ogg_page *page)
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{
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if(theora_p)
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ogg_stream_pagein(&t_stream_state,page);
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if(vorbis_p)
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ogg_stream_pagein(&v_stream_state,page);
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return 0;
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}
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static int buffer_data(FILE *in,ogg_sync_state *oy)
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{
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char *buffer=ogg_sync_buffer(oy,4096);
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int bytes=fread(buffer,1,4096,in);
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ogg_sync_wrote(oy,bytes);
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return(bytes);
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}
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typedef KGenericFactory<theoraPlugin> theoraFactory;
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K_EXPORT_COMPONENT_FACTORY(kfile_theora, theoraFactory( "kfile_theora" ))
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theoraPlugin::theoraPlugin(TQObject *parent, const char *name,
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const TQStringList &args)
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: KFilePlugin(parent, name, args)
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{
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// kdDebug(7034) << "theora plugin\n";
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KFileMimeTypeInfo* info = addMimeTypeInfo( "video/x-theora" );
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KFileMimeTypeInfo::GroupInfo* group = 0;
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KFileMimeTypeInfo::ItemInfo* item;
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// video group
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group = addGroupInfo(info, "Video", i18n("Video Details"));
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setAttributes(group, 0);
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item = addItemInfo(group, "Length", i18n("Length"), TQVariant::Int);
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setUnit(item, KFileMimeTypeInfo::Seconds);
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setHint(item, KFileMimeTypeInfo::Length);
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item = addItemInfo(group, "Resolution", i18n("Resolution"), TQVariant::Size);
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setHint(item, KFileMimeTypeInfo::Size);
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setUnit(item, KFileMimeTypeInfo::Pixels);
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item = addItemInfo(group, "FrameRate", i18n("Frame Rate"), TQVariant::Int);
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setUnit(item, KFileMimeTypeInfo::FramesPerSecond);
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item = addItemInfo(group, "TargetBitrate", i18n("Target Bitrate"), TQVariant::Int);
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setUnit(item, KFileMimeTypeInfo::Bitrate);
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item = addItemInfo(group, "Quality", i18n("Quality"), TQVariant::Int);
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// audio group
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group = addGroupInfo(info, "Audio", i18n("Audio Details"));
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setAttributes(group, 0);
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addItemInfo(group, "Channels", i18n("Channels"), TQVariant::Int);
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item = addItemInfo(group, "SampleRate", i18n("Sample Rate"), TQVariant::Int);
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setUnit(item, KFileMimeTypeInfo::Hertz);
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}
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bool theoraPlugin::readInfo( KFileMetaInfo& info, uint what)
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{
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// most of the ogg stuff was borrowed from libtheora/examples/player_example.c
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FILE *fp;
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ogg_sync_state o_sync_state;
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ogg_packet o_packet;
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ogg_page o_page;
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theora_info t_info;
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theora_comment t_comment;
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theora_state t_state;
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vorbis_info v_info;
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vorbis_comment v_comment;
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theora_p=0;
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vorbis_p=0;
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int theora_serial=0;
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int stateflag=0;
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ogg_int64_t duration=0;
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// libtheora is still a bit unstable and sadly the init_ functions don't
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// take care of things the way one would expect. So, let's do some explicit
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// clearing of these fields.
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memset(&t_info, 0, sizeof(theora_info));
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memset(&t_comment, 0, sizeof(theora_comment));
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memset(&t_state, 0, sizeof(theora_state));
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bool readTech = false;
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if (what & (KFileMetaInfo::Fastest |
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KFileMetaInfo::DontCare |
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KFileMetaInfo::TechnicalInfo))
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readTech = true;
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if ( info.path().isEmpty() ) // remote file
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return false;
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fp = fopen(TQFile::encodeName(info.path()),"rb");
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if (!fp)
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{
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kdDebug(7034) << "Unable to open " << TQFile::encodeName(info.path()).data() << endl;
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return false;
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}
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ogg_sync_init(&o_sync_state);
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/* init supporting Vorbis structures needed in header parsing */
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vorbis_info_init(&v_info);
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vorbis_comment_init(&v_comment);
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/* init supporting Theora structures needed in header parsing */
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theora_comment_init(&t_comment);
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theora_info_init(&t_info);
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while(!stateflag && buffer_data(fp,&o_sync_state)!=0)
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{
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while (ogg_sync_pageout(&o_sync_state,&o_page)>0)
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{
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ogg_stream_state stream_test;
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/* is this a mandated initial header? If not, stop parsing */
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if(!ogg_page_bos(&o_page))
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{
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queue_page(&o_page);
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stateflag=1;
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break;
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}
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ogg_stream_init(&stream_test,ogg_page_serialno(&o_page));
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ogg_stream_pagein(&stream_test,&o_page);
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ogg_stream_packetout(&stream_test,&o_packet);
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/* identify the codec: try theora */
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if(!theora_p && theora_decode_header(&t_info,&t_comment,&o_packet)>=0)
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{
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/* it is theora */
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memcpy(&t_stream_state,&stream_test,sizeof(stream_test));
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theora_serial=ogg_page_serialno(&o_page);
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theora_p=1;
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}
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else if(!vorbis_p && vorbis_synthesis_headerin(&v_info,&v_comment,&o_packet)>=0)
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{
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/* it is vorbis */
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memcpy(&v_stream_state,&stream_test,sizeof(stream_test));
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vorbis_p=1;
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}
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else
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{
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/* whatever it is, we don't care about it */
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ogg_stream_clear(&stream_test);
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}
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}
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}
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/* we're expecting more header packets. */
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bool corruptedHeaders=false;
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while((theora_p && theora_p<3) || (vorbis_p && vorbis_p<3))
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{
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int ret;
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/* look for further theora headers */
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while(theora_p && (theora_p<3) && (ret=ogg_stream_packetout(&t_stream_state,&o_packet)))
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{
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if(ret<0)
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{
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kdDebug(7034)<<"Error parsing Theora stream headers; corrupt stream?\n"<<endl;
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corruptedHeaders=true;
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}
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if(theora_decode_header(&t_info,&t_comment,&o_packet))
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{
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kdDebug(7034)<<"Error parsing Theora stream headers; corrupt stream?"<<endl;
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corruptedHeaders=true;
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}
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theora_p++;
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if(theora_p==3)
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break;
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}
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/* look for more vorbis header packets */
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while(vorbis_p && (vorbis_p<3) && (ret=ogg_stream_packetout(&v_stream_state,&o_packet)))
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{
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if(ret<0)
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{
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kdDebug(7034)<<"Error parsing Vorbis stream headers; corrupt stream"<<endl;
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corruptedHeaders=true;
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}
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if(vorbis_synthesis_headerin(&v_info,&v_comment,&o_packet))
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{
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kdDebug(7034)<<"Error parsing Vorbis stream headers; corrupt stream?"<<endl;
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corruptedHeaders=true;
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}
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vorbis_p++;
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if(vorbis_p==3)
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break;
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}
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/* The header pages/packets will arrive before anything else we
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care about, or the stream is not obeying spec */
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if(ogg_sync_pageout(&o_sync_state,&o_page)>0)
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{
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queue_page(&o_page);
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/* demux into the appropriate stream */
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}
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else
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{
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int ret=buffer_data(fp,&o_sync_state); /* someone needs more data */
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if(ret==0)
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{
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kdDebug(7034)<<"End of file while searching for codec headers."<<endl;
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corruptedHeaders=true;
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}
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}
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}
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/* and now we have it all. initialize decoders */
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if(theora_p && !corruptedHeaders)
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{
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theora_decode_init(&t_state,&t_info);
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}
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else
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{
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/* tear down the partial theora setup */
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theora_info_clear(&t_info);
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theora_comment_clear(&t_comment);
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vorbis_info_clear(&v_info);
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vorbis_comment_clear(&v_comment);
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ogg_sync_clear(&o_sync_state);
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fclose(fp);
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return false;
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}
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//queue_page(&o_page);
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while (buffer_data(fp,&o_sync_state))
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{
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while (ogg_sync_pageout(&o_sync_state,&o_page)>0)
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{
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// The following line was commented out by Scott Wheeler <wheeler@kde.org>
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// We don't actually need to store all of the pages / packets in memory since
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// (a) libtheora doesn't use them anyway in the one call that we make after this
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// that usese t_state and (b) it basically buffers the entire file to memory if
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// we queue them up like this and that sucks where a typical file size is a few
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// hundred megs.
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// queue_page(&o_page);
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}
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if (theora_serial==ogg_page_serialno(&o_page))
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duration=(ogg_int64_t) theora_granule_time(&t_state,ogg_page_granulepos(&o_page));
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}
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if (readTech)
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{
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int stream_fps=0;
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if (t_info.fps_denominator!=0)
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stream_fps=t_info.fps_numerator/t_info.fps_denominator;
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KFileMetaInfoGroup videogroup = appendGroup(info, "Video");
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appendItem(videogroup, "Length", int (duration));
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appendItem(videogroup, "Resolution", TQSize(t_info.frame_width,t_info.frame_height));
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appendItem(videogroup, "FrameRate", stream_fps);
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appendItem(videogroup, "Quality", (int) t_info.quality);
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KFileMetaInfoGroup audiogroup = appendGroup(info, "Audio");
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appendItem(audiogroup, "Channels", v_info.channels);
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appendItem(audiogroup, "SampleRate", int(v_info.rate));
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}
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fclose(fp);
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if (vorbis_p)
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{
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ogg_stream_clear(&v_stream_state);
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vorbis_comment_clear(&v_comment);
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vorbis_info_clear(&v_info);
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}
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ogg_stream_clear(&t_stream_state);
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theora_clear(&t_state);
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theora_comment_clear(&t_comment);
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theora_info_clear(&t_info);
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ogg_sync_clear(&o_sync_state);
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return true;
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}
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#include "kfile_theora.moc"
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