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541 lines
14 KiB
541 lines
14 KiB
/* This file is part of the KDE project
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* Copyright (C) 2002 Shane Wright <me@shanewright.co.uk>
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*
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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
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* License as published by the Free Software Foundation version 2.
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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 GNU
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include <config.h>
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#include "kfile_avi.h"
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#include <kprocess.h>
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#include <klocale.h>
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#include <kgenericfactory.h>
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#include <kstringvalidator.h>
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#include <kdebug.h>
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#include <tqdict.h>
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#include <tqvalidator.h>
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#include <tqcstring.h>
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#include <tqfile.h>
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#include <tqdatetime.h>
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#if !defined(__osf__)
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#include <inttypes.h>
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#else
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typedef unsigned short uint16_t;
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typedef unsigned int uint32_t;
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typedef unsigned long long uint64_t;
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#endif
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typedef KGenericFactory<KAviPlugin> AviFactory;
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K_EXPORT_COMPONENT_FACTORY(kfile_avi, AviFactory( "kfile_avi" ))
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KAviPlugin::KAviPlugin(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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KFileMimeTypeInfo* info = addMimeTypeInfo( "video/x-msvideo" );
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KFileMimeTypeInfo::GroupInfo* group = 0L;
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group = addGroupInfo(info, "Technical", i18n("Technical Details"));
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KFileMimeTypeInfo::ItemInfo* item;
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item = addItemInfo(group, "Length", i18n("Length"), TQVariant::Int);
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setUnit(item, KFileMimeTypeInfo::Seconds);
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item = addItemInfo(group, "Resolution", i18n("Resolution"), TQVariant::Size);
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item = addItemInfo(group, "Frame rate", i18n("Frame Rate"), TQVariant::Int);
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setSuffix(item, i18n("fps"));
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item = addItemInfo(group, "Video codec", i18n("Video Codec"), TQVariant::String);
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item = addItemInfo(group, "Audio codec", i18n("Audio Codec"), TQVariant::String);
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}
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bool KAviPlugin::read_avi()
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{
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static const char sig_riff[] = "RIFF";
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static const char sig_avi[] = "AVI ";
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static const char sig_list[] = "LIST";
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static const char sig_junk[] = "JUNK";
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uint32_t dwbuf1;
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done_avih = false;
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done_audio = false;
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// read AVI header
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char charbuf1[5];
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charbuf1[4] = '\0';
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// this must be RIFF
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f.readBlock(charbuf1, 4);
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if (memcmp(charbuf1, sig_riff, 4) != 0)
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return false;
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dstream >> dwbuf1;
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// this must be AVI
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f.readBlock(charbuf1, 4);
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if (memcmp(charbuf1, sig_avi, 4) != 0)
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return false;
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// start reading AVI file
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int counter = 0;
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bool done = false;
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do {
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// read header
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f.readBlock(charbuf1, 4);
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kdDebug(7034) << "about to handle chunk with ID: " << charbuf1 << "\n";
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if (memcmp(charbuf1, sig_list, 4) == 0) {
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// if list
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if (!read_list())
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return false;
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} else if (memcmp(charbuf1, sig_junk, 4) == 0) {
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// if junk
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// read chunk size
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dstream >> dwbuf1;
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kdDebug(7034) << "Skipping junk chunk length: " << dwbuf1 << "\n";
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// skip junk
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f.at( f.at() + dwbuf1 );
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} else {
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// something we dont understand yet
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kdDebug(7034) << "Unknown chunk header found: " << charbuf1 << "\n";
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return false;
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};
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if (
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((done_avih) && (strlen(handler_vids) > 0) && (done_audio)) ||
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f.atEnd()) {
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kdDebug(7034) << "We're done!\n";
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done = true;
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}
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// make sure we dont stay here forever
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++counter;
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if (counter > 10)
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done = true;
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} while (!done);
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return true;
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}
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bool KAviPlugin::read_list()
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{
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const char sig_hdrl[] = "hdrl"; // header list
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const char sig_strl[] = "strl"; // ...list
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const char sig_movi[] = "movi"; // movie list
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uint32_t dwbuf1;
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char charbuf1[5];
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charbuf1[4] = '\0';
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kdDebug(7034) << "In read_list()\n";
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// read size & list type
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dstream >> dwbuf1;
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f.readBlock(charbuf1, 4);
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// read the relevant bits of the list
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if (memcmp(charbuf1, sig_hdrl, 4) == 0) {
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// should be the main AVI header
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if (!read_avih())
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return false;
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} else if (memcmp(charbuf1, sig_strl, 4) == 0) {
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// should be some stream info
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if (!read_strl())
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return false;
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} else if (memcmp(charbuf1, sig_movi, 4) == 0) {
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// movie list
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kdDebug(7034) << "Skipping movi chunk length: " << dwbuf1 << "\n";
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// skip past it
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f.at( f.at() + dwbuf1 );
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} else {
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// unknown list type
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kdDebug(7034) << "Unknown list type found: " << charbuf1 << "\n";
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}
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return true;
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}
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bool KAviPlugin::read_avih()
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{
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static const char sig_avih[] = "avih"; // header list
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uint32_t dwbuf1;
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char charbuf1[5];
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// read header and length
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f.readBlock(charbuf1, 4);
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dstream >> dwbuf1;
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// not a valid avih?
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if (memcmp(charbuf1, sig_avih, 4) != 0) {
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kdDebug(7034) << "Chunk ID error, expected avih, got: " << charbuf1 << "\n";
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return false;
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}
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// read all the avih fields
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dstream >> avih_microsecperframe;
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dstream >> avih_maxbytespersec;
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dstream >> avih_reserved1;
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dstream >> avih_flags;
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dstream >> avih_totalframes;
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dstream >> avih_initialframes;
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dstream >> avih_streams;
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dstream >> avih_buffersize;
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dstream >> avih_width;
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dstream >> avih_height;
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dstream >> avih_scale;
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dstream >> avih_rate;
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dstream >> avih_start;
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dstream >> avih_length;
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done_avih = true;
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return true;
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}
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bool KAviPlugin::read_strl()
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{
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static const char sig_strh[] = "strh";
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static const char sig_strf[] = "strf";
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//static const char sig_strd[] = "strd";
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static const char sig_strn[] = "strn";
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static const char sig_list[] = "LIST";
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static const char sig_junk[] = "JUNK";
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kdDebug(7034) << "in strl handler\n";
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uint32_t dwbuf1; // buffer for block sizes
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char charbuf1[5];
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// loop through blocks
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int counter = 0;
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while (true) {
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// read type and size
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f.readBlock(charbuf1, 4); // type
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dstream >> dwbuf1; // size
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// detect type
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if (memcmp(charbuf1, sig_strh, 4) == 0) {
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// got strh - stream header
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kdDebug(7034) << "Found strh, calling read_strh()\n";
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read_strh(dwbuf1);
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} else if (memcmp(charbuf1, sig_strf, 4) == 0) {
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// got strf - stream format
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kdDebug(7034) << "Found strf, calling read_strf()\n";
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read_strf(dwbuf1);
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} else if (memcmp(charbuf1, sig_strn, 4) == 0) {
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// we ignore strn, but it can be recorded incorrectly so we have to cope especially
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// skip it
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kdDebug(7034) << "Skipping strn chunk length: " << dwbuf1 << "\n";
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f.at( f.at() + dwbuf1 );
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/*
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this is a pretty annoying hack; many AVIs incorrectly report the
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length of the strn field by 1 byte. Its possible that strn's
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should be word aligned, but no mention in the specs...
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I'll clean/optimise this a touch soon
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*/
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bool done = false;
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unsigned char counter = 0;
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while (!done) {
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// read next marker
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f.readBlock(charbuf1, 4);
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// does it look ok?
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if ((memcmp(charbuf1, sig_list, 4) == 0) ||
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(memcmp(charbuf1, sig_junk, 4) == 0)) {
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// yes, go back before it
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f.at( f.at() - 4);
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done = true;
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} else {
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// no, skip one space forward from where we were
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f.at( f.at() - 3);
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kdDebug(7034) << "Working around incorrectly marked strn length..." << "\n";
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}
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// make sure we don't stay here too long
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++counter;
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if (counter>10)
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done = true;
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}
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} else if ((memcmp(charbuf1, sig_list, 4) == 0) || (memcmp(charbuf1, sig_junk, 4) == 0)) {
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// we have come to the end of our stay here in strl, time to leave
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kdDebug(7034) << "Found LIST/JUNK, returning...\n";
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// rollback before the id and size
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f.at( f.at() - 8 );
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// return back to the main avi parser
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return true;
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} else {
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// we have some other unrecognised block type
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kdDebug(7034) << "Sskipping unrecognised block\n";
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// just skip over it
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f.at( f.at() + dwbuf1);
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} /* switch block type */
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++counter;
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if (counter > 10)
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return true;
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} /* while (true) */
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// we should never get here
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}
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bool KAviPlugin::read_strh(uint32_t blocksize)
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{
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static const char sig_vids[] = "vids"; // ...video
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static const char sig_auds[] = "auds"; // ...audio
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uint32_t strh_flags;
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uint32_t strh_reserved1;
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uint32_t strh_initialframes;
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uint32_t strh_scale;
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uint32_t strh_rate;
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uint32_t strh_start;
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uint32_t strh_length;
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uint32_t strh_buffersize;
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uint32_t strh_quality;
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uint32_t strh_samplesize;
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char charbuf1[5];
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char charbuf2[5];
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// get stream info type, and handler id
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f.readBlock(charbuf1, 4);
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f.readBlock(charbuf2, 4);
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// read the strh fields
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dstream >> strh_flags;
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dstream >> strh_reserved1;
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dstream >> strh_initialframes;
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dstream >> strh_scale;
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dstream >> strh_rate;
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dstream >> strh_start;
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dstream >> strh_length;
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dstream >> strh_buffersize;
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dstream >> strh_quality;
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dstream >> strh_samplesize;
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if (memcmp(&charbuf1, sig_vids, 4) == 0) {
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// we are video!
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// save the handler
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memcpy(handler_vids, charbuf2, 4);
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kdDebug(7034) << "Video handler: " << handler_vids << "\n";
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} else if (memcmp(&charbuf1, sig_auds, 4) == 0) {
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// we are audio!
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// save the handler
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memcpy(handler_auds, charbuf2, 4);
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kdDebug(7034) << "Audio handler: " << handler_auds << "\n";
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// we want strf to get the audio codec
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wantstrf = true;
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} else {
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// we are something that we don't understand
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}
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// do we need to skip ahead any more? (usually yes , contrary to
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// the AVI specs I've read...)
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// note: 48 is 10 * uint32_t + 2*FOURCC; the 10 fields we read above, plus the two character fields
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if (blocksize > 48)
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f.at( f.at() + (blocksize - 48) );
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return true;
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}
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bool KAviPlugin::read_strf(uint32_t blocksize)
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{
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// do we want to do the strf?
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if (wantstrf) {
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// yes. we want the audio codec identifier out of it
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// get the 16bit audio codec ID
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dstream >> handler_audio;
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kdDebug(7034) << "Read audio codec ID: " << handler_audio << "\n";
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// skip past the rest of the stuff here for now
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f.at( f.at() + blocksize - 2);
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// we have audio
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done_audio = true;
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} else {
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// no, skip the strf
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f.at( f.at() + blocksize );
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}
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return true;
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}
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const char * KAviPlugin::resolve_audio(uint16_t id)
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{
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/*
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this really wants to use some sort of KDE global
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list. To avoid bloat for the moment it only does
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a few common codecs
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*/
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static const char codec_unknown[] = I18N_NOOP("Unknown");
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static const char codec_01[] = "Microsoft PCM";
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static const char codec_02[] = "Microsoft ADPCM";
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static const char codec_50[] = "MPEG";
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static const char codec_55[] = "MP3";
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static const char codec_92[] = "AC3";
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static const char codec_160[] = "WMA1";
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static const char codec_161[] = "WMA2";
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static const char codec_162[] = "WMA3";
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static const char codec_2000[] = "DVM";
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switch (id) {
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case 0x000 : return codec_unknown; break;
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case 0x001 : return codec_01; break;
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case 0x002 : return codec_02; break;
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case 0x050 : return codec_50; break;
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case 0x055 : return codec_55; break;
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case 0x092 : return codec_92; break;
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case 0x160 : return codec_160; break;
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case 0x161 : return codec_161; break;
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case 0x162 : return codec_162; break;
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case 0x2000 : return codec_2000; break;
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default : return codec_unknown;
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}
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return NULL;
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}
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bool KAviPlugin::readInfo( KFileMetaInfo& info, uint /*what*/)
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{
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/***************************************************/
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// prep
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memset(handler_vids, 0x00, 5);
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memset(handler_auds, 0x00, 5);
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/***************************************************/
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// sort out the file
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if (f.isOpen())
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f.close();
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if ( info.path().isEmpty() ) // remote file
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return false;
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f.setName(info.path());
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// open file, set up stream and set endianness
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if (!f.open(IO_ReadOnly))
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{
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kdDebug(7034) << "Couldn't open " << TQFile::encodeName(info.path()).data() << endl;
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return false;
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}
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//TQDataStream dstream(&file);
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dstream.setDevice(&f);
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dstream.setByteOrder(TQDataStream::LittleEndian);
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/***************************************************/
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// start reading stuff from it
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wantstrf = false;
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if (!read_avi()) {
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kdDebug(7034) << "read_avi() failed!" << endl;
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}
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/***************************************************/
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// set up our output
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if (done_avih) {
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KFileMetaInfoGroup group = appendGroup(info, "Technical");
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if (0 != avih_microsecperframe) {
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appendItem(group, "Frame rate", int(1000000 / avih_microsecperframe));
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}
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appendItem(group, "Resolution", TQSize(avih_width, avih_height));
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// work out and add length
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uint64_t mylength = (uint64_t) ((float) avih_totalframes * (float) avih_microsecperframe / 1000000.0);
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appendItem(group, "Length", int(mylength));
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if (strlen(handler_vids) > 0)
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appendItem(group, "Video codec", handler_vids);
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else
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appendItem(group, "Video codec", i18n("Unknown"));
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if (done_audio)
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appendItem(group, "Audio codec", i18n(resolve_audio(handler_audio)));
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else
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appendItem(group, "Audio codec", i18n("None"));
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}
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f.close();
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return true;
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}
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#include "kfile_avi.moc"
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