hedgewars/uVideoRec.pas
author nemo
Mon, 28 Mar 2016 18:19:20 -0400
changeset 11629 56aa40beedf0
parent 11617 b7d5d75469ee
child 11826 d8844d4c67de
permissions -rw-r--r--
RC planes should not pick up frozen crates
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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, uUtils, GLunit, SDLh, SysUtils, 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 YCbCr_Planes: array[0..2] of PByte;
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    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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2f062fac5791 Add that "make screenshots of Land/LandPixels" thing for map creators
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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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{$IOCHECKS OFF}
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    result:= 0; // avoid compiler hint and warning
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    for i:= 0 to 1023 do
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        buffer[i]:= 0;
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    Assign(inF, src);
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    Reset(inF, 1);
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    if IOResult <> 0 then
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    begin
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        AddFileLog('Error: Could not read from ' + src);
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        exit;
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    end;
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   230
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    Assign(outF, dest);
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    Rewrite(outF, 1);
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    if IOResult <> 0 then
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   234
    begin
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        AddFileLog('Error: Could not write to ' + dest);
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        exit;
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   237
    end;
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   238
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    repeat
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        BlockRead(inF, buffer, 1024, result);
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        BlockWrite(outF, buffer, result);
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    until result < 1024;
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{$IOCHECKS ON}
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   244
end;
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   245
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5debd5fe526e 1. Add IFDEFs for video recording
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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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   252
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46921fbe76d3 Move SDL_GetTicks() to another place, maybe this will fix sound desync.
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   253
    thumbnailSaved:= false;
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   254
    RecPrefix:= 'hw-' + FormatDateTime('YYYY-MM-DD_HH-mm-ss-z', Now());
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   255
7392
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    // If this video is recorded from demo executed directly (without frontend)
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   257
    // then we need to copy demo so that frontend will be able to find it later.
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   258
    if recordFileName <> '' then
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   259
    begin
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   260
        if GameType <> gmtDemo then // this is save and game demo is not recording, abort
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   261
            exit;
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   262
        CopyFile(recordFileName, UserPathPrefix + '/VideoTemp/' + RecPrefix + '.hwd');
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   263
    end;
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   264
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    Mix_QuerySpec(@frequency, @format, @channels);
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   266
    AddFileLog('sound: frequency = ' + IntToStr(frequency) + ', format = ' + IntToStr(format) + ', channels = ' + IntToStr(channels));
7180
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   267
    if format <> $8010 then
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   268
    begin
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        // TODO: support any audio format
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        AddFileLog('Error: Unexpected audio format ' + IntToStr(format));
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        exit;
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    end;
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{$IOCHECKS OFF}
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baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   275
    // create sound file
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    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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   280
    begin
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   281
        AddFileLog('Error: Could not write to ' + filename);
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        exit;
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   283
    end;
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parents:
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   284
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baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   285
    // create file with camera positions
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   286
    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