AVIStripeSystem.cpp
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上传日期:2010-03-30
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文件大小:7k
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VC书籍
开发平台:
Visual C++
- // VirtualDub - Video processing and capture application
- // Copyright (C) 1998-2001 Avery Lee
- //
- // This program is free software; you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation; either version 2 of the License, or
- // (at your option) any later version.
- //
- // This program 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 General Public License for more details.
- //
- // You should have received a copy of the GNU General Public License
- // along with this program; if not, write to the Free Software
- // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- #include "VirtualDub.h"
- #include <string.h>
- #include <stdio.h>
- #include <ctype.h>
- #include <windows.h>
- #include <vfw.h>
- //#include "ProgressDialog.h"
- #include "Error.h"
- #include "AVIStripeSystem.h"
- ///////////////////////////////////////////////////////////////////////////
- //
- // AVIStripe
- //
- ///////////////////////////////////////////////////////////////////////////
- void *AVIStripe::operator new(size_t stSize, int iNameBytes) {
- return malloc(stSize + iNameBytes);
- }
- ///////////////////////////////////////////////////////////////////////////
- //
- // AVIStripeSystem
- //
- ///////////////////////////////////////////////////////////////////////////
- void AVIStripeSystem::_construct(int nStripes) {
- int i;
- this->nStripes = nStripes;
- if (!(stripe = new AVIStripe *[nStripes]))
- throw MyMemoryError();
- for(i=0; i<nStripes; i++)
- stripe[i] = NULL;
- }
- AVIStripeSystem::AVIStripeSystem(int nStripes) {
- _construct(nStripes);
- }
- static bool get_line(char *buf, size_t buf_size, FILE *f) {
- char *s;
- do {
- if (!fgets(buf, buf_size, f))
- return false;
- s = buf;
- while(*s && isspace(*s) && *s!='n')
- ++s;
- } while(!*s || *s=='n' || buf[0]=='#');
- return true;
- }
- AVIStripeSystem::AVIStripeSystem(char *szFile) {
- FILE *f = NULL;
- stripe = NULL;
- try {
- char linebuf[512];
- int stripe_cnt, cur;
- int lineno = 2;
- char *s, *t;
- // Type of lines we are trying to parse:
- //
- // 0 i 131072 65536 e:capture_master.avi
- // 0 v 4194304 1048576 "e:capture video stripe 1.avi"
- // -1 v 1048576 524288 "i:capture video stripe 2.avi"
- f = fopen(szFile, "r");
- if (!f) throw MyError("Couldn't open stripe definition file "%s"", szFile);
- if (!get_line(linebuf, sizeof linebuf, f))
- throw MyError("Failure reading first line of stripe def file");
- if (1!=sscanf(linebuf, " %d n", &stripe_cnt))
- throw MyError("First line of stripe definition file must contain stripe count");
- if (stripe_cnt<=0)
- throw MyError("Invalid number of stripes (%d)", stripe_cnt);
- _construct(stripe_cnt);
- for(cur=0; cur<stripe_cnt; cur++) {
- int iPri, iName;
- long lBuffer, lChunk;
- char cMode[2];
- int match_count;
- if (!get_line(linebuf, sizeof linebuf, f))
- throw MyError("Failure reading stripe definition file");
- match_count = sscanf(linebuf, " %d %1s %ld %ld %n", &iPri, cMode, &lBuffer, &lChunk, &iName);
- if (match_count != 4)
- throw MyError("Stripe definition parse error: line %d", lineno);
- t = s = linebuf + iName;
- if (*s=='"') {
- ++s, ++t;
- while(*t && *t!='n' && *t!='"') ++t;
- } else
- while(*t && *t!='n' && !isspace(*t)) ++t;
- if (t<=s)
- throw MyError("Stripe definition parse error: line %d -- no stripe filename!", lineno);
- switch(tolower(cMode[0])) {
- case 'm': cMode[0] = AVIStripe::MODE_MASTER; break;
- case 'i': cMode[0] = AVIStripe::MODE_INDEX; break;
- case 'v': cMode[0] = AVIStripe::MODE_VIDEO; break;
- case 'a': cMode[0] = AVIStripe::MODE_AUDIO; break;
- case 'b': cMode[0] = AVIStripe::MODE_BOTH; break;
- default:
- throw MyError("Invalid stripe mode '%c'", cMode[0]);
- };
- // Allocate a stripe structure and copy the data into it
- if (!(stripe[cur] = new(t+1-s) AVIStripe))
- throw MyMemoryError();
- *t=0;
- stripe[cur]->lBufferSize = lBuffer;
- stripe[cur]->lChunkSize = lChunk;
- stripe[cur]->iNameLen = t+1-s;
- stripe[cur]->cStripeMode = cMode[0];
- stripe[cur]->scPriority = iPri;
- strcpy(stripe[cur]->szName, s);
- ++lineno;
- }
- } catch(...) {
- if (f) fclose(f);
- _destruct();
- throw;
- }
- fclose(f);
- }
- void AVIStripeSystem::_destruct() {
- int i;
- if (stripe)
- for(i=0; i<nStripes; i++)
- delete stripe[i];
- delete stripe;
- }
- AVIStripeSystem::~AVIStripeSystem() {
- _destruct();
- }
- int AVIStripeSystem::getStripeCount() {
- return nStripes;
- }
- AVIStripe *AVIStripeSystem::getStripeInfo(int nStripe) {
- return stripe[nStripe];
- }
- ///////////////////////////////////////////////////////////////////////////
- //
- // AVIStripeIndexLookup
- //
- ///////////////////////////////////////////////////////////////////////////
- AVIStripeIndexLookup::AVIStripeIndexLookup(IAVIReadStream *pasIndex) {
- index_table = NULL;
- try {
- AVIStripeIndexEntry *asieptr;
- LONG lStart, lCur, lEnd;
- if (-1 == (lStart = pasIndex->Start())
- || -1 == (lEnd = pasIndex->End()))
- throw MyError("Stripe index: can't get start/end of index stream");
- // ProgressDialog pd(NULL, "AVI Striped Import Filter", "Reading stripe index", lEnd-lStart, true);
- // pd.setValueFormat("Frame %ld/%ld");
- index_table_size = lEnd - lStart;
- if (!(index_table = new AVIStripeIndexEntry[index_table_size]))
- throw MyMemoryError();
- asieptr = index_table;
- pasIndex->BeginStreaming(lStart, lEnd, 100000);
- lCur = lStart;
- while(lCur < lEnd) {
- HRESULT err;
- LONG lActualBytes, lActualSamples;
- err = pasIndex->Read(lCur, lEnd-lCur, asieptr, sizeof(AVIStripeIndexEntry)*(lEnd-lCur), &lActualBytes, &lActualSamples);
- if (err == AVIERR_OK && !lActualSamples)
- err = AVIERR_FILEREAD;
- if (err != AVIERR_OK) throw MyAVIError("AVIStripeIndex",err);
- if (lActualBytes != lActualSamples * sizeof(AVIStripeIndexEntry))
- throw MyError("Stripe index: bad index marks! (not 16 bytes)");
- lCur += lActualSamples;
- asieptr += lActualSamples;
- // pd.advance(lCur);
- // pd.check();
- }
- pasIndex->EndStreaming();
- } catch(...) {
- delete index_table;
- throw;
- }
- }
- AVIStripeIndexLookup::~AVIStripeIndexLookup() {
- delete index_table;
- }
- AVIStripeIndexEntry *AVIStripeIndexLookup::lookup(long sample) {
- long l, pivot, r;
- // _RPT1(0, "AVIStripeIndexEntry: looking up %ldn", sample);
- l = 0;
- r = index_table_size-1;
- while(l <= r) {
- pivot = (l+r)/2;
- if (sample > index_table[pivot])
- l = pivot+1;
- else if (sample < index_table[pivot])
- r = pivot-1;
- else {
- // _RPT2(0,"tFound in stripe %ld at %ldn", index_table[pivot].lStripe+1, index_table[pivot].lStripeSample);
- return &index_table[pivot];
- }
- }
- _RPT0(0,"tNot found!n");
- return NULL;
- }