hedgewars/uVideoRec.pas
author Wuzzy <Wuzzy2@mail.ru>
Thu, 15 Mar 2018 21:15:16 +0100
changeset 13221 02bf6902eeb0
parent 12621 d972b31f8881
child 13226 4028d7f85233
permissions -rw-r--r--
Remove Qt SVG and Qt OpenGL as hard dependencies Qt SVG is not used in the frontend (no SVGs are rendered). Neither is Qt OpenGL used. Qt OpenGL is discouraged anyway.
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(*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
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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; version 2 of the License
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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 Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *)
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{$INCLUDE "options.inc"}
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unit uVideoRec;
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{$IFNDEF USE_VIDEO_RECORDING}
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interface
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implementation
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end.
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{$ELSE}
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{$IFNDEF WIN32}
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    {$linklib avwrapper}
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{$ENDIF}
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interface
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var flagPrerecording: boolean = false;
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function BeginVideoRecording: Boolean;
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function LoadNextCameraPosition(out newRealTicks, newGameTicks: LongInt): Boolean;
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procedure EncodeFrame;
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procedure StopVideoRecording;
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procedure BeginPreRecording;
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procedure StopPreRecording;
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procedure SaveCameraPosition;
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procedure initModule;
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procedure freeModule;
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implementation
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uses uVariables, GLunit, SDLh, SysUtils, uUtils, uIO, uMisc, uTypes, uDebug;
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type TAddFileLogRaw = procedure (s: pchar); cdecl;
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const AvwrapperLibName = 'libavwrapper';
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function AVWrapper_Init(
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              AddLog: TAddFileLogRaw;
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              filename, desc, soundFile, format, vcodec, acodec: PChar;
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              width, height, framerateNum, framerateDen, vquality: LongInt): LongInt; cdecl; external AvwrapperLibName;
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function AVWrapper_Close: LongInt; cdecl; external AvwrapperLibName;
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function AVWrapper_WriteFrame(rgb: PByte): LongInt; cdecl; external AvwrapperLibName;
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type TFrame = record
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                  realTicks: LongWord;
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                  gameTicks: LongWord;
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                  CamX, CamY: LongInt;
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                  zoom: single;
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              end;
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var RGB_Buffer: PByte;
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    cameraFile: File of TFrame;
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    audioFile: File;
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    numPixels: LongWord;
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    startTime, numFrames, curTime, progress, maxProgress: LongWord;
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    soundFilePath: shortstring;
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    thumbnailSaved : Boolean;
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function BeginVideoRecording: Boolean;
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var filename, desc: shortstring;
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begin
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    AddFileLog('BeginVideoRecording');
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{$IOCHECKS OFF}
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    // open file with prerecorded camera positions
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    filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.txtin';
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    Assign(cameraFile, filename);
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    Reset(cameraFile);
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    maxProgress:= FileSize(cameraFile);
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    if IOResult <> 0 then
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    begin
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        AddFileLog('Error: Could not read from ' + filename);
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        exit(false);
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    end;
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{$IOCHECKS ON}
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    // store some description in output file
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    desc:= '';
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    if UserNick <> '' then
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        desc:= desc + 'Player: ' + UserNick + #10;
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    if recordFileName <> '' then
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        desc:= desc + 'Record: ' + recordFileName + #10;
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    if cMapName <> '' then
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        desc:= desc + 'Map: ' + cMapName + #10;
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    if Theme <> '' then
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        desc:= desc + 'Theme: ' + Theme + #10;
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    desc:= desc + 'prefix[' + RecPrefix + ']prefix';
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    filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix;
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    soundFilePath:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.sw';
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    if checkFails(AVWrapper_Init(@AddFileLogRaw
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        , PChar(ansistring(filename))
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        , PChar(ansistring(desc))
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        , PChar(ansistring(soundFilePath))
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        , PChar(ansistring(cAVFormat))
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        , PChar(ansistring(cVideoCodec))
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        , PChar(ansistring(cAudioCodec))
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        , cScreenWidth, cScreenHeight, cVideoFramerateNum, cVideoFramerateDen, cVideoQuality) >= 0,
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        'AVWrapper_Init failed',
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        true) then exit(false);
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    numPixels:= cScreenWidth*cScreenHeight;
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    RGB_Buffer:= GetMem(4*numPixels);
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    if RGB_Buffer = nil then
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    begin
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        AddFileLog('Error: Could not allocate memory for video recording (RGB buffer).');
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        exit(false);
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    end;
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    curTime:= 0;
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    numFrames:= 0;
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    progress:= 0;
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    BeginVideoRecording:= true;
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end;
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procedure StopVideoRecording;
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begin
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    AddFileLog('StopVideoRecording');
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    FreeMem(RGB_Buffer, 4*numPixels);
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    Close(cameraFile);
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    if AVWrapper_Close() < 0 then
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        halt(-1);
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    Erase(cameraFile);
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    DeleteFile(soundFilePath);
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    SendIPC(_S'v'); // inform frontend that we finished
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end;
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procedure EncodeFrame;
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var s: shortstring;
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begin
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    // read pixels from OpenGL
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    glReadPixels(0, 0, cScreenWidth, cScreenHeight, GL_RGBA, GL_UNSIGNED_BYTE, RGB_Buffer);
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    if AVWrapper_WriteFrame(RGB_Buffer) < 0 then
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        halt(-1);
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    // inform frontend that we have encoded new frame
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    s[0]:= #3;
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    s[1]:= 'p'; // p for progress
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    SDLNet_Write16(progress*10000 div maxProgress, @s[2]);
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    SendIPC(s);
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    inc(numFrames);
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end;
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function LoadNextCameraPosition(out newRealTicks, newGameTicks: LongInt): Boolean;
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var frame: TFrame = (realTicks: 0; gameTicks: 0; CamX: 0; CamY: 0; zoom: 0);
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begin
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    // we need to skip or duplicate frames to match target framerate
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    while Int64(curTime)*cVideoFramerateNum <= Int64(numFrames)*cVideoFramerateDen*1000 do
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    begin
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    {$IOCHECKS OFF}
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        if eof(cameraFile) then
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            exit(false);
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        BlockRead(cameraFile, frame, 1);
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    {$IOCHECKS ON}
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        curTime:= frame.realTicks;
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        WorldDx:= frame.CamX;
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        WorldDy:= frame.CamY + cScreenHeight div 2;
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        zoom:= frame.zoom*cScreenWidth;
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        ZoomValue:= zoom;
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        inc(progress);
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        newRealTicks:= frame.realTicks;
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        newGameTicks:= frame.gameTicks;
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    end;
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    LoadNextCameraPosition:= true;
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end;
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// Callback which records sound.
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// This procedure may be called from different thread.
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procedure RecordPostMix(udata: pointer; stream: PByte; len: LongInt); cdecl;
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begin
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    udata:= udata; // avoid warning
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{$IOCHECKS OFF}
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    BlockWrite(audioFile, stream^, len);
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{$IOCHECKS ON}
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end;
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procedure SaveThumbnail;
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var thumbpath: shortstring;
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    k: LongInt;
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begin
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    thumbpath:= '/VideoTemp/' + RecPrefix;
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    AddFileLog('Saving thumbnail ' + thumbpath);
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    k:= max(max(cScreenWidth, cScreenHeight) div 400, 1); // here 400 is minimum size of thumbnail
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    MakeScreenshot(thumbpath, k, 0);
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    thumbnailSaved:= true;
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end;
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// copy file (free pascal doesn't have copy file function)
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procedure CopyFile(src, dest: shortstring);
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var inF, outF: file;
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    buffer: array[0..1023] of byte;
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    result: LongInt;
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    i: integer;
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begin
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{$IOCHECKS OFF}
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    result:= 0; // avoid compiler hint and warning
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    for i:= 0 to 1023 do
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        buffer[i]:= 0;
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    Assign(inF, src);
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    Reset(inF, 1);
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    if IOResult <> 0 then
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    begin
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        AddFileLog('Error: Could not read from ' + src);
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        exit;
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    end;
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   229
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    Assign(outF, dest);
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    Rewrite(outF, 1);
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    if IOResult <> 0 then
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    begin
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        AddFileLog('Error: Could not write to ' + dest);
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        exit;
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   236
    end;
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   237
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    repeat
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        BlockRead(inF, buffer, 1024, result);
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        BlockWrite(outF, buffer, result);
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    until result < 1024;
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{$IOCHECKS ON}
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   243
end;
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   244
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procedure BeginPreRecording;
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var format: word;
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    filename: shortstring;
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    frequency, channels: LongInt;
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begin
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    AddFileLog('BeginPreRecording');
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baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   251
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46921fbe76d3 Move SDL_GetTicks() to another place, maybe this will fix sound desync.
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   252
    thumbnailSaved:= false;
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   253
    RecPrefix:= 'hw-' + FormatDateTime('YYYY-MM-DD_HH-mm-ss-z', Now());
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   254
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    // If this video is recorded from demo executed directly (without frontend)
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   256
    // then we need to copy demo so that frontend will be able to find it later.
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   257
    if recordFileName <> '' then
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   258
    begin
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   259
        if GameType <> gmtDemo then // this is save and game demo is not recording, abort
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   260
            exit;
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   261
        CopyFile(recordFileName, UserPathPrefix + '/VideoTemp/' + RecPrefix + '.hwd');
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   262
    end;
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   263
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    Mix_QuerySpec(@frequency, @format, @channels);
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   265
    AddFileLog('sound: frequency = ' + IntToStr(frequency) + ', format = ' + IntToStr(format) + ', channels = ' + IntToStr(channels));
7180
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   266
    if format <> $8010 then
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   267
    begin
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        // TODO: support any audio format
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        AddFileLog('Error: Unexpected audio format ' + IntToStr(format));
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5debd5fe526e 1. Add IFDEFs for video recording
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        exit;
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   271
    end;
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{$IOCHECKS OFF}
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baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   274
    // create sound file
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   275
    filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.sw';
7180
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    Assign(audioFile, filename);
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    Rewrite(audioFile, 1);
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    if IOResult <> 0 then
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    begin
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   280
        AddFileLog('Error: Could not write to ' + filename);
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5debd5fe526e 1. Add IFDEFs for video recording
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        exit;
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    end;
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parents:
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   283
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baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   284
    // create file with camera positions
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   285
    filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.txtout';
7180
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    Assign(cameraFile, filename);
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    Rewrite(cameraFile);
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    if IOResult <> 0 then
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    begin
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        AddFileLog('Error: Could not write to ' + filename);
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        exit;
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    end;
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    // save audio parameters in sound file
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    BlockWrite(audioFile, frequency, 4);
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    BlockWrite(audioFile, channels, 4);
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{$IOCHECKS ON}
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    // register callback for actual audio recording
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    Mix_SetPostMix(@RecordPostMix, nil);
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    startTime:= SDL_GetTicks();
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    flagPrerecording:= true;
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end;
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procedure StopPreRecording;
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begin
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    AddFileLog('StopPreRecording');
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    flagPrerecording:= false;
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    // call SDL_LockAudio because RecordPostMix may be executing right now
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    SDL_LockAudio();
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    Close(audioFile);
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    Close(cameraFile);
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    Mix_SetPostMix(nil, nil);
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    SDL_UnlockAudio();
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    if not thumbnailSaved then
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        SaveThumbnail();
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end;
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procedure SaveCameraPosition;
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var frame: TFrame;
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begin
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    if (not thumbnailSaved) and (ScreenFade = sfNone) then
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        SaveThumbnail();
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    frame.realTicks:= SDL_GetTicks() - startTime;
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    frame.gameTicks:= GameTicks;
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    frame.CamX:= WorldDx;
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    frame.CamY:= WorldDy - cScreenHeight div 2;
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    frame.zoom:= zoom/cScreenWidth;
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    BlockWrite(cameraFile, frame, 1);
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end;
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procedure initModule;
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begin
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    // we need to make sure these variables are initialized before the main loop
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    // or the wrapper will keep the default values of preinit
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    cScreenWidth:= max(cWindowedWidth, 640);
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    cScreenHeight:= max(cWindowedHeight, 480);
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end;
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procedure freeModule;
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begin
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    if flagPrerecording then
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        StopPreRecording();
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end;
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end.
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{$ENDIF} // USE_VIDEO_RECORDING