hedgewars/uVideoRec.pas
author koda
Sun, 20 Mar 2016 03:08:51 -0400
changeset 11617 b7d5d75469ee
parent 11537 bf86c6cb9341
child 11826 d8844d4c67de
permissions -rw-r--r--
Move pixel format conversion from uVideoRec to AVWrapper This has several benefits, being in C-land allows us to better use libav API and avoid mixing memory allocated from Pascal. Also the C code for the conversion loop generated by GCC or Clang is probably more optimized than by Freepascal. Finally it will simplify code in the future if we are going to enable any other pixel format than yuv420p. Change the coefficients to improve color accuracy during conversion.
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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;
7180
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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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   155
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   156
    if AVWrapper_WriteFrame(RGB_Buffer) < 0 then
9925
113e61a8cadc Fixed avwrapper exit calls, fixing issue 752
Gianfranco Costamagna <costamagnagianfranco@yahoo.it>
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   157
        halt(-1);
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   159
    // inform frontend that we have encoded new frame
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   160
    s[0]:= #3;
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   161
    s[1]:= 'p'; // p for progress
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   162
    SDLNet_Write16(progress*10000 div maxProgress, @s[2]);
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   163
    SendIPC(s);
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    inc(numFrames);
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   165
end;
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   166
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   167
function LoadNextCameraPosition(out newRealTicks, newGameTicks: LongInt): Boolean;
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   168
var frame: TFrame = (realTicks: 0; gameTicks: 0; CamX: 0; CamY: 0; zoom: 0);
7180
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   169
begin
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   170
    // we need to skip or duplicate frames to match target framerate
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   171
    while Int64(curTime)*cVideoFramerateNum <= Int64(numFrames)*cVideoFramerateDen*1000 do
7376
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   172
    begin
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   173
    {$IOCHECKS OFF}
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   174
        if eof(cameraFile) then
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   175
            exit(false);
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   176
        BlockRead(cameraFile, frame, 1);
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   177
    {$IOCHECKS ON}
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   178
        curTime:= frame.realTicks;
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   179
        WorldDx:= frame.CamX;
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   180
        WorldDy:= frame.CamY + cScreenHeight div 2;
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   181
        zoom:= frame.zoom*cScreenWidth;
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   182
        ZoomValue:= zoom;
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   183
        inc(progress);
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   184
        newRealTicks:= frame.realTicks;
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   185
        newGameTicks:= frame.gameTicks;
7376
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   186
    end;
7392
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   187
    LoadNextCameraPosition:= true;
7180
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   188
end;
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   189
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baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   190
// Callback which records sound.
baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   191
// This procedure may be called from different thread.
7180
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   192
procedure RecordPostMix(udata: pointer; stream: PByte; len: LongInt); cdecl;
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   193
begin
7235
baa69bd025d9 1. Implement new page in frontend with options for video recording.
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   194
    udata:= udata; // avoid warning
7180
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   195
{$IOCHECKS OFF}
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   196
    BlockWrite(audioFile, stream^, len);
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   197
{$IOCHECKS ON}
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   198
end;
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   199
7306
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   200
procedure SaveThumbnail;
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   201
var thumbpath: shortstring;
3cff5c769509 Here they come - thumbnails.
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   202
    k: LongInt;
3cff5c769509 Here they come - thumbnails.
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   203
begin
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   204
    thumbpath:= '/VideoTemp/' + RecPrefix;
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   205
    AddFileLog('Saving thumbnail ' + thumbpath);
7386
e82a076df09b Fix bug with isInLag picture displayed at end of some videos.
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diff changeset
   206
    k:= max(max(cScreenWidth, cScreenHeight) div 400, 1); // here 400 is minimum size of thumbnail
10633
2f062fac5791 Add that "make screenshots of Land/LandPixels" thing for map creators
nemo
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   207
    MakeScreenshot(thumbpath, k, 0);
7306
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   208
    thumbnailSaved:= true;
3cff5c769509 Here they come - thumbnails.
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   209
end;
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   210
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   211
// copy file (free pascal doesn't have copy file function)
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   212
procedure CopyFile(src, dest: shortstring);
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   213
var inF, outF: file;
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   214
    buffer: array[0..1023] of byte;
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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   215
    result: LongInt;
8370
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martin_bede
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   216
    i: integer;
7392
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   217
begin
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   218
{$IOCHECKS OFF}
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martin_bede
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   219
    result:= 0; // avoid compiler hint and warning
0c79946e96f8 Fix tons of warnings
martin_bede
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   220
    for i:= 0 to 1023 do
0c79946e96f8 Fix tons of warnings
martin_bede
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diff changeset
   221
        buffer[i]:= 0;
7392
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   222
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   223
    Assign(inF, src);
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   224
    Reset(inF, 1);
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   225
    if IOResult <> 0 then
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   226
    begin
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   227
        AddFileLog('Error: Could not read from ' + src);
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   228
        exit;
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   229
    end;
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diff changeset
   230
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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   231
    Assign(outF, dest);
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   232
    Rewrite(outF, 1);
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   233
    if IOResult <> 0 then
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diff changeset
   234
    begin
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   235
        AddFileLog('Error: Could not write to ' + dest);
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   236
        exit;
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diff changeset
   237
    end;
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parents: 7386
diff changeset
   238
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   239
    repeat
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   240
        BlockRead(inF, buffer, 1024, result);
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   241
        BlockWrite(outF, buffer, result);
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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   242
    until result < 1024;
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   243
{$IOCHECKS ON}
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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diff changeset
   244
end;
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diff changeset
   245
7198
5debd5fe526e 1. Add IFDEFs for video recording
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diff changeset
   246
procedure BeginPreRecording;
7180
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parents:
diff changeset
   247
var format: word;
7306
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   248
    filename: shortstring;
7280
fd707afbc3a2 pagevideos is now much better that before:
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   249
    frequency, channels: LongInt;
7180
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parents:
diff changeset
   250
begin
53ffc8853008 here it is
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parents:
diff changeset
   251
    AddFileLog('BeginPreRecording');
7235
baa69bd025d9 1. Implement new page in frontend with options for video recording.
Stepan777 <stepik-777@mail.ru>
parents: 7198
diff changeset
   252
7369
46921fbe76d3 Move SDL_GetTicks() to another place, maybe this will fix sound desync.
Stepan777 <stepik-777@mail.ru>
parents: 7363
diff changeset
   253
    thumbnailSaved:= false;
7386
e82a076df09b Fix bug with isInLag picture displayed at end of some videos.
Stepan777 <stepik-777@mail.ru>
parents: 7379
diff changeset
   254
    RecPrefix:= 'hw-' + FormatDateTime('YYYY-MM-DD_HH-mm-ss-z', Now());
7306
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parents: 7286
diff changeset
   255
7392
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   256
    // If this video is recorded from demo executed directly (without frontend)
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   257
    // then we need to copy demo so that frontend will be able to find it later.
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   258
    if recordFileName <> '' then
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   259
    begin
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   260
        if GameType <> gmtDemo then // this is save and game demo is not recording, abort
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
Stepan777 <stepik-777@mail.ru>
parents: 7386
diff changeset
   261
            exit;
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   262
        CopyFile(recordFileName, UserPathPrefix + '/VideoTemp/' + RecPrefix + '.hwd');
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
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parents: 7386
diff changeset
   263
    end;
bc3306c59a08 Correctly distinguish between game and real ticks while recording video,
Stepan777 <stepik-777@mail.ru>
parents: 7386
diff changeset
   264
7180
53ffc8853008 here it is
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parents:
diff changeset
   265
    Mix_QuerySpec(@frequency, @format, @channels);
7280
fd707afbc3a2 pagevideos is now much better that before:
Stepan777 <stepik-777@mail.ru>
parents: 7235
diff changeset
   266
    AddFileLog('sound: frequency = ' + IntToStr(frequency) + ', format = ' + IntToStr(format) + ', channels = ' + IntToStr(channels));
7180
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parents:
diff changeset
   267
    if format <> $8010 then
53ffc8853008 here it is
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parents:
diff changeset
   268
    begin
53ffc8853008 here it is
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parents:
diff changeset
   269
        // TODO: support any audio format
53ffc8853008 here it is
Stepan777 <stepik-777@mail.ru>
parents:
diff changeset
   270
        AddFileLog('Error: Unexpected audio format ' + IntToStr(format));
7198
5debd5fe526e 1. Add IFDEFs for video recording
Stepan777 <stepik-777@mail.ru>
parents: 7180
diff changeset
   271
        exit;
7180
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parents:
diff changeset
   272
    end;
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Stepan777 <stepik-777@mail.ru>
parents:
diff changeset
   273
53ffc8853008 here it is
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parents:
diff changeset
   274
{$IOCHECKS OFF}
7235
baa69bd025d9 1. Implement new page in frontend with options for video recording.
Stepan777 <stepik-777@mail.ru>
parents: 7198
diff changeset
   275
    // create sound file
7306
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diff changeset
   276
    filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.sw';
7180
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parents:
diff changeset
   277
    Assign(audioFile, filename);
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parents:
diff changeset
   278
    Rewrite(audioFile, 1);
53ffc8853008 here it is
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parents:
diff changeset
   279
    if IOResult <> 0 then
53ffc8853008 here it is
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parents:
diff changeset
   280
    begin
53ffc8853008 here it is
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parents:
diff changeset
   281
        AddFileLog('Error: Could not write to ' + filename);
7198
5debd5fe526e 1. Add IFDEFs for video recording
Stepan777 <stepik-777@mail.ru>
parents: 7180
diff changeset
   282
        exit;
7180
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parents:
diff changeset
   283
    end;
53ffc8853008 here it is
Stepan777 <stepik-777@mail.ru>
parents:
diff changeset
   284
7235
baa69bd025d9 1. Implement new page in frontend with options for video recording.
Stepan777 <stepik-777@mail.ru>
parents: 7198
diff changeset
   285
    // create file with camera positions
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    filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.txtout';
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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