Improve appearance of bullet trails, slight fade out at beginning
This especially improves the appearance of minigun bullet trails
(*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
{$INCLUDE "options.inc"}
unit uVideoRec;
{$IFNDEF USE_VIDEO_RECORDING}
interface
implementation
end.
{$ELSE}
{$IFNDEF WIN32}
{$linklib avwrapper}
{$ENDIF}
interface
var flagPrerecording: boolean = false;
function BeginVideoRecording: Boolean;
function LoadNextCameraPosition(out newRealTicks, newGameTicks: LongInt): Boolean;
procedure EncodeFrame;
procedure StopVideoRecording;
procedure BeginPreRecording;
procedure StopPreRecording;
procedure SaveCameraPosition;
procedure initModule;
procedure freeModule;
implementation
uses uVariables, GLunit, SDLh, SysUtils, uUtils, uIO, uMisc, uTypes, uDebug;
type TAddFileLogRaw = procedure (s: pchar); cdecl;
const AvwrapperLibName = 'libavwrapper';
function AVWrapper_Init(
AddLog: TAddFileLogRaw;
filename, desc, soundFile, format, vcodec, acodec: PChar;
width, height, framerateNum, framerateDen, vquality: LongInt): LongInt; cdecl; external AvwrapperLibName;
function AVWrapper_Close: LongInt; cdecl; external AvwrapperLibName;
function AVWrapper_WriteFrame(rgb: PByte): LongInt; cdecl; external AvwrapperLibName;
type TFrame = record
realTicks: LongWord;
gameTicks: LongWord;
CamX, CamY: LongInt;
zoom: single;
end;
var RGB_Buffer: PByte;
cameraFile: File of TFrame;
audioFile: File;
numPixels: LongWord;
startTime, numFrames, curTime, progress, maxProgress: LongWord;
soundFilePath: shortstring;
thumbnailSaved : Boolean;
function BeginVideoRecording: Boolean;
var filename, desc: shortstring;
begin
AddFileLog('BeginVideoRecording');
{$IOCHECKS OFF}
// open file with prerecorded camera positions
filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.txtin';
Assign(cameraFile, filename);
Reset(cameraFile);
maxProgress:= FileSize(cameraFile);
if IOResult <> 0 then
begin
AddFileLog('Error: Could not read from ' + filename);
exit(false);
end;
{$IOCHECKS ON}
// store some description in output file
desc:= '';
if UserNick <> '' then
desc:= desc + 'Player: ' + UserNick + #10;
if recordFileName <> '' then
desc:= desc + 'Record: ' + recordFileName + #10;
if cMapName <> '' then
desc:= desc + 'Map: ' + cMapName + #10;
if Theme <> '' then
desc:= desc + 'Theme: ' + Theme + #10;
desc:= desc + 'prefix[' + RecPrefix + ']prefix';
filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix;
soundFilePath:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.sw';
if checkFails(AVWrapper_Init(@AddFileLogRaw
, PChar(ansistring(filename))
, PChar(ansistring(desc))
, PChar(ansistring(soundFilePath))
, PChar(ansistring(cAVFormat))
, PChar(ansistring(cVideoCodec))
, PChar(ansistring(cAudioCodec))
, cScreenWidth, cScreenHeight, cVideoFramerateNum, cVideoFramerateDen, cVideoQuality) >= 0,
'AVWrapper_Init failed',
true) then exit(false);
numPixels:= cScreenWidth*cScreenHeight;
RGB_Buffer:= GetMem(4*numPixels);
if RGB_Buffer = nil then
begin
AddFileLog('Error: Could not allocate memory for video recording (RGB buffer).');
exit(false);
end;
curTime:= 0;
numFrames:= 0;
progress:= 0;
BeginVideoRecording:= true;
end;
procedure StopVideoRecording;
begin
AddFileLog('StopVideoRecording');
FreeMem(RGB_Buffer, 4*numPixels);
Close(cameraFile);
if AVWrapper_Close() < 0 then
halt(-1);
Erase(cameraFile);
DeleteFile(soundFilePath);
SendIPC(_S'v'); // inform frontend that we finished
end;
procedure EncodeFrame;
var s: shortstring;
begin
// read pixels from OpenGL
glReadPixels(0, 0, cScreenWidth, cScreenHeight, GL_RGBA, GL_UNSIGNED_BYTE, RGB_Buffer);
if AVWrapper_WriteFrame(RGB_Buffer) < 0 then
halt(-1);
// inform frontend that we have encoded new frame
s[0]:= #3;
s[1]:= 'p'; // p for progress
SDLNet_Write16(progress*10000 div maxProgress, @s[2]);
SendIPC(s);
inc(numFrames);
end;
function LoadNextCameraPosition(out newRealTicks, newGameTicks: LongInt): Boolean;
var frame: TFrame = (realTicks: 0; gameTicks: 0; CamX: 0; CamY: 0; zoom: 0);
begin
// we need to skip or duplicate frames to match target framerate
while Int64(curTime)*cVideoFramerateNum <= Int64(numFrames)*cVideoFramerateDen*1000 do
begin
{$IOCHECKS OFF}
if eof(cameraFile) then
exit(false);
BlockRead(cameraFile, frame, 1);
{$IOCHECKS ON}
curTime:= frame.realTicks;
WorldDx:= frame.CamX;
WorldDy:= frame.CamY + cScreenHeight div 2;
zoom:= frame.zoom*cScreenWidth;
ZoomValue:= zoom;
inc(progress);
newRealTicks:= frame.realTicks;
newGameTicks:= frame.gameTicks;
end;
LoadNextCameraPosition:= true;
end;
// Callback which records sound.
// This procedure may be called from different thread.
procedure RecordPostMix(udata: pointer; stream: PByte; len: LongInt); cdecl;
begin
udata:= udata; // avoid warning
{$IOCHECKS OFF}
BlockWrite(audioFile, stream^, len);
{$IOCHECKS ON}
end;
procedure SaveThumbnail;
var thumbpath: shortstring;
k: LongInt;
begin
thumbpath:= '/VideoTemp/' + RecPrefix;
AddFileLog('Saving thumbnail ' + thumbpath);
k:= max(max(cScreenWidth, cScreenHeight) div 400, 1); // here 400 is minimum size of thumbnail
MakeScreenshot(thumbpath, k, 0);
thumbnailSaved:= true;
end;
// copy file (free pascal doesn't have copy file function)
procedure CopyFile(src, dest: shortstring);
var inF, outF: file;
buffer: array[0..1023] of byte;
result: LongInt;
i: integer;
begin
{$IOCHECKS OFF}
result:= 0; // avoid compiler hint and warning
for i:= 0 to 1023 do
buffer[i]:= 0;
Assign(inF, src);
Reset(inF, 1);
if IOResult <> 0 then
begin
AddFileLog('Error: Could not read from ' + src);
exit;
end;
Assign(outF, dest);
Rewrite(outF, 1);
if IOResult <> 0 then
begin
AddFileLog('Error: Could not write to ' + dest);
exit;
end;
repeat
BlockRead(inF, buffer, 1024, result);
BlockWrite(outF, buffer, result);
until result < 1024;
{$IOCHECKS ON}
end;
procedure BeginPreRecording;
var format: word;
filename: shortstring;
frequency, channels: LongInt;
begin
AddFileLog('BeginPreRecording');
thumbnailSaved:= false;
RecPrefix:= 'hw-' + FormatDateTime('YYYY-MM-DD_HH-mm-ss-z', Now());
// If this video is recorded from demo executed directly (without frontend)
// then we need to copy demo so that frontend will be able to find it later.
if recordFileName <> '' then
begin
if GameType <> gmtDemo then // this is save and game demo is not recording, abort
exit;
CopyFile(recordFileName, UserPathPrefix + '/VideoTemp/' + RecPrefix + '.hwd');
end;
Mix_QuerySpec(@frequency, @format, @channels);
AddFileLog('sound: frequency = ' + IntToStr(frequency) + ', format = ' + IntToStr(format) + ', channels = ' + IntToStr(channels));
if format <> $8010 then
begin
// TODO: support any audio format
AddFileLog('Error: Unexpected audio format ' + IntToStr(format));
exit;
end;
{$IOCHECKS OFF}
// create sound file
filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.sw';
Assign(audioFile, filename);
Rewrite(audioFile, 1);
if IOResult <> 0 then
begin
AddFileLog('Error: Could not write to ' + filename);
exit;
end;
// create file with camera positions
filename:= UserPathPrefix + '/VideoTemp/' + RecPrefix + '.txtout';
Assign(cameraFile, filename);
Rewrite(cameraFile);
if IOResult <> 0 then
begin
AddFileLog('Error: Could not write to ' + filename);
exit;
end;
// save audio parameters in sound file
BlockWrite(audioFile, frequency, 4);
BlockWrite(audioFile, channels, 4);
{$IOCHECKS ON}
// register callback for actual audio recording
Mix_SetPostMix(@RecordPostMix, nil);
startTime:= SDL_GetTicks();
flagPrerecording:= true;
end;
procedure StopPreRecording;
begin
AddFileLog('StopPreRecording');
flagPrerecording:= false;
// call SDL_LockAudio because RecordPostMix may be executing right now
SDL_LockAudio();
Close(audioFile);
Close(cameraFile);
Mix_SetPostMix(nil, nil);
SDL_UnlockAudio();
if not thumbnailSaved then
SaveThumbnail();
end;
procedure SaveCameraPosition;
var frame: TFrame;
begin
if (not thumbnailSaved) and (ScreenFade = sfNone) then
SaveThumbnail();
frame.realTicks:= SDL_GetTicks() - startTime;
frame.gameTicks:= GameTicks;
frame.CamX:= WorldDx;
frame.CamY:= WorldDy - cScreenHeight div 2;
frame.zoom:= zoom/cScreenWidth;
BlockWrite(cameraFile, frame, 1);
end;
procedure initModule;
begin
// we need to make sure these variables are initialized before the main loop
// or the wrapper will keep the default values of preinit
cScreenWidth:= max(cWindowedWidth, 640);
cScreenHeight:= max(cWindowedHeight, 480);
end;
procedure freeModule;
begin
if flagPrerecording then
StopPreRecording();
end;
end.
{$ENDIF} // USE_VIDEO_RECORDING