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501 lines
13 KiB
501 lines
13 KiB
//////////////////////////////////////////////////////////////////////////
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//
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// handle AVI RLE files with custom code.
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//
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// use this code to deal with .AVI files without the MCIAVI runtime
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//
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// restrictions:
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// AVI file must be a simple DIB format (RLE or none)
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// AVI file must fit into memory.
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//
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// ToddLa
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//
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//////////////////////////////////////////////////////////////////////////
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#include "ctlspriv.h"
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extern "C"
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{
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#include "rlefile.h"
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}
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#include <lendian.hpp>
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extern "C"
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BOOL RleFile_Init(RLEFILE *prle, LPVOID pFile, HANDLE hRes, DWORD dwFileLen);
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//////////////////////////////////////////////////////////////////////////
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//
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//////////////////////////////////////////////////////////////////////////
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LPVOID LoadFile(LPCTSTR szFile, DWORD * pFileLength)
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{
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LPVOID pFile;
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HANDLE hFile;
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HANDLE h;
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DWORD FileLength;
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hFile = CreateFile(szFile, GENERIC_READ, FILE_SHARE_READ, NULL,
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (hFile == INVALID_HANDLE_VALUE)
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return 0;
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FileLength = (LONG)GetFileSize(hFile, NULL);
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if (pFileLength)
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*pFileLength = FileLength ;
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h = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
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if (!h)
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{
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CloseHandle(hFile);
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return 0;
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}
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pFile = MapViewOfFile(h, FILE_MAP_READ, 0, 0, 0);
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CloseHandle(hFile);
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CloseHandle(h);
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if (pFile == NULL)
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return 0;
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return pFile;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_OpenFromFile
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//
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// load a .AVI file into memory and setup all of our pointers so we
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// know how to deal with it.
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_OpenFromFile(RLEFILE *prle, LPCTSTR szFile)
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{
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DWORD dwFileLen;
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LPVOID pFile;
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// MAKEINTRESOURCE() things can't come from files
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if (IS_INTRESOURCE(szFile))
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return FALSE;
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if (pFile = LoadFile(szFile, &dwFileLen))
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return RleFile_Init(prle, pFile, NULL, dwFileLen);
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else
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return FALSE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_OpenFromResource
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//
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// load a .AVI file into memory and setup all of our pointers so we
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// know how to deal with it.
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_OpenFromResource(RLEFILE *prle, HINSTANCE hInstance, LPCTSTR szName, LPCTSTR szType)
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{
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HRSRC h;
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HANDLE hRes;
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// not a MAKEINTRESOURCE(), and points to NULL
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if (!IS_INTRESOURCE(szName) && (*szName == 0))
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return FALSE;
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h = FindResource(hInstance, szName, szType);
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if (h == NULL)
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return FALSE;
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if (hRes = LoadResource(hInstance, h))
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return RleFile_Init(prle, LockResource(hRes), hRes, 0);
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else
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return FALSE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_Close
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//
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// nuke all stuff we did to open the file.
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_Close(RLEFILE *prle)
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{
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if (prle->hpal)
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DeleteObject(prle->hpal);
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if (prle->pFile)
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{
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if (prle->hRes)
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{
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FreeResource(prle->hRes);
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}
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else
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UnmapViewOfFile(prle->pFile);
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}
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prle->hpal = NULL;
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prle->pFile = NULL;
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prle->hRes = NULL;
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prle->pMainHeader = NULL;
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prle->pStream = NULL;
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prle->pFormat = NULL;
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prle->pMovie = NULL;
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prle->pIndex = NULL;
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return TRUE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_Init
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_Init(RLEFILE *prle, LPVOID pFile, HANDLE hRes, DWORD dwFileLen)
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{
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DWORD_LENDIAN UNALIGNED *pdw;
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DWORD_LENDIAN UNALIGNED *pdwEnd;
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DWORD dwRiff;
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DWORD dwType;
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DWORD dwLength;
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int stream;
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if (prle->pFile == pFile)
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return TRUE;
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RleFile_Close(prle);
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prle->pFile = pFile;
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prle->hRes = hRes;
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if (prle->pFile == NULL)
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return FALSE;
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//
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// now that the file is in memory walk the memory image filling in
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// interesting stuff.
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//
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pdw = (DWORD_LENDIAN UNALIGNED *)prle->pFile;
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dwRiff = *pdw++;
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dwLength = *pdw++;
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dwType = *pdw++;
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if ((dwFileLen > 0) && (dwLength > dwFileLen))
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{
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// File is physically shorter than the length written in its header.
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// Can't handle it.
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goto exit;
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}
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if (dwRiff != mmioFOURCC('R', 'I', 'F', 'F'))
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goto exit; // not even a RIFF file
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if (dwType != formtypeAVI)
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goto exit; // not a AVI file
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pdwEnd = (DWORD_LENDIAN UNALIGNED *)((BYTE PTR *)pdw + dwLength-4);
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stream = 0;
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while (pdw < pdwEnd)
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{
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dwType = *pdw++;
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dwLength = *pdw++;
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switch (dwType)
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{
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case mmioFOURCC('L', 'I', 'S', 'T'):
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dwType = *pdw++;
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dwLength -= 4;
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switch (dwType)
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{
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case listtypeAVIMOVIE:
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prle->pMovie = (LPVOID)pdw;
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break;
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case listtypeSTREAMHEADER:
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case listtypeAVIHEADER:
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dwLength = 0; // decend
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break;
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default:
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break; // ignore
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}
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break;
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case ckidAVIMAINHDR:
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{
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prle->pMainHeader = (MainAVIHeader PTR *)pdw;
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prle->NumFrames = (int)prle->pMainHeader->dwTotalFrames;
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prle->Width = (int)prle->pMainHeader->dwWidth;
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prle->Height = (int)prle->pMainHeader->dwHeight;
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prle->Rate = (int)(prle->pMainHeader->dwMicroSecPerFrame/1000);
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if (prle->pMainHeader->dwInitialFrames != 0)
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goto exit;
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if (prle->pMainHeader->dwStreams > 2)
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goto exit;
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}
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break;
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case ckidSTREAMHEADER:
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{
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stream++;
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if (prle->pStream != NULL)
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break;
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if (((AVIStreamHeader PTR *)pdw)->fccType != streamtypeVIDEO)
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break;
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prle->iStream = stream-1;
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prle->pStream = (AVIStreamHeader PTR*)pdw;
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if (prle->pStream->dwFlags & AVISF_VIDEO_PALCHANGES)
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goto exit;
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}
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break;
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case ckidSTREAMFORMAT:
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if (prle->pFormat != NULL)
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break;
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if (prle->pStream == NULL)
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break;
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prle->pFormat = (LPBITMAPINFOHEADER)pdw;
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if (prle->pFormat->biSize != sizeof(BITMAPINFOHEADER))
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goto exit;
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if (prle->pFormat->biCompression != 0 &&
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prle->pFormat->biCompression != BI_RLE8)
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goto exit;
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if (prle->pFormat->biWidth != prle->Width)
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goto exit;
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if (prle->pFormat->biHeight != prle->Height)
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goto exit;
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hmemcpy(&prle->bi, prle->pFormat, dwLength);
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prle->bi.biSizeImage = 0;
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prle->FullSizeImage = ((prle->bi.biWidth * prle->bi.biBitCount + 31) & ~31)/8U * prle->bi.biHeight;
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break;
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case ckidAVINEWINDEX:
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// we dont convert indexes because we dont know how many there are
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// but we will have to convert each usage of it
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prle->pIndex = (AVIINDEXENTRY PTR *)pdw;
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break;
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}
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pdw = (DWORD_LENDIAN *)((BYTE PTR *)pdw + ((dwLength+1)&~1));
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}
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//
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// if the file has nothing in it we care about get out, note
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// we dont need a index, we do need some data though.
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//
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if (prle->NumFrames == 0 ||
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prle->pMainHeader == NULL ||
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prle->pStream == NULL ||
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prle->pFormat == NULL ||
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prle->pMovie == NULL )
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{
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goto exit;
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}
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//
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// if we cared about a palette we would create it here.
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//
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//
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// file open'ed ok seek to the first frame.
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//
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prle->iFrame = -42;
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RleFile_Seek(prle, 0);
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return TRUE;
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exit:
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RleFile_Close(prle);
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return FALSE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_ChangeColor
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//
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// change the color table of the AVI
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_ChangeColor(RLEFILE *prle, COLORREF rgbS, COLORREF rgbD)
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{
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prle->clrKey = rgbS;
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return TRUE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_Seek
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//
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// find the data for the specifed frame.
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_Seek(RLEFILE *prle, int iFrame)
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{
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int n;
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if (prle == NULL || prle->pMovie == NULL)
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return FALSE;
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if (iFrame >= prle->NumFrames)
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return FALSE;
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if (iFrame < 0)
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return FALSE;
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if (iFrame == prle->iFrame)
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return TRUE;
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if (prle->iFrame >= 0 && prle->iFrame < iFrame)
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{
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n = prle->nFrame; // start where you left off last time
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}
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else
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{
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n = -1; // start at the begining
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prle->iFrame = -1; // current frame
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prle->iKeyFrame = 0; // current key
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}
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while (prle->iFrame < iFrame)
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{
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n++;
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if (StreamFromFOURCC(*(DWORD_LENDIAN UNALIGNED *)(&prle->pIndex[n].ckid)) == (UINT)prle->iStream)
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{
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prle->iFrame++; // new frame
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if ((long)(*(DWORD_LENDIAN UNALIGNED *)(&prle->pIndex[n].dwFlags)) & AVIIF_KEYFRAME)
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prle->iKeyFrame = prle->iFrame; /* // new key frame */
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}
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}
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prle->nFrame = n;
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/* warning this points to bitmap bits in wintel format ! */
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prle->pFrame = (BYTE PTR *)prle->pMovie +
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(int)(*(DWORD_LENDIAN UNALIGNED *)(&prle->pIndex[n].dwChunkOffset)) + 4;
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prle->cbFrame = *(DWORD_LENDIAN UNALIGNED *)(&prle->pIndex[n].dwChunkLength);
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ASSERT( (DWORD)(*(DWORD_LENDIAN UNALIGNED *)&(((DWORD PTR *)prle->pFrame)[-1])) == (DWORD)prle->cbFrame);
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ASSERT( (DWORD)(*(DWORD_LENDIAN UNALIGNED *)&(((DWORD PTR *)prle->pFrame)[-2])) == (DWORD)*(DWORD_LENDIAN UNALIGNED *)(&prle->pIndex[n].ckid));
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prle->bi.biSizeImage = prle->cbFrame;
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if (prle->cbFrame == prle->FullSizeImage)
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prle->bi.biCompression = 0;
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else
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prle->bi.biCompression = BI_RLE8;
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return TRUE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_Paint
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//
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// draw the specifed frame, makes sure the entire frame is updated
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// dealing with non-key frames correctly.
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_Paint(RLEFILE *prle, HDC hdc, int iFrame, int x, int y)
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{
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int i;
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BOOL f;
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if (prle == NULL || prle->pMovie == NULL)
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return FALSE;
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if (f = RleFile_Seek(prle, iFrame))
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{
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HDC h = CreateCompatibleDC(hdc);
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if (h)
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{
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HBITMAP hbmp = CreateCompatibleBitmap(hdc, prle->Width, prle->Height);
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if (hbmp)
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{
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HBITMAP hbmpOld = (HBITMAP)SelectObject(h, hbmp);
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iFrame = prle->iFrame;
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for (i=prle->iKeyFrame; i<=iFrame; i++)
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RleFile_Draw(prle, h, i, 0, 0);
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GdiTransparentBlt(hdc, x, y, prle->Width, prle->Height, h,
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0, 0, prle->Width, prle->Height, prle->clrKey);
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SelectObject(h, hbmpOld);
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DeleteObject(hbmp);
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}
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DeleteDC(h);
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}
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}
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return f;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// RleFile_Draw
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//
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// draw the data for a specifed frame
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//
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//////////////////////////////////////////////////////////////////////////
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extern "C"
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BOOL RleFile_Draw(RLEFILE *prle, HDC hdc, int iFrame, int x, int y)
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{
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BOOL f;
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if (prle == NULL || prle->pMovie == NULL)
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return FALSE;
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if (prle->hpal)
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{
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SelectPalette(hdc, prle->hpal, FALSE);
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RealizePalette(hdc);
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}
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if (f = RleFile_Seek(prle, iFrame))
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{
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if (prle->cbFrame > 0)
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{
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StretchDIBits(hdc,
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x, y, prle->Width, prle->Height,
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0, 0, prle->Width, prle->Height,
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prle->pFrame, (LPBITMAPINFO)&prle->bi,
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DIB_RGB_COLORS, SRCCOPY);
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}
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}
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return f;
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}
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