* AVI video output

  - Uses motion jpeg codec by default
  - Use cl_avidemo to set a framerate
  - \video [filename] to start capture
  - \stopvideo to stop capture
  - Audio capture is a bit ropey


git-svn-id: svn://svn.icculus.org/quake3/trunk@454 edf5b092-35ff-0310-97b2-ce42778d08ea

15 files changed, 910 insertions, 11 deletions

diff --git a/code/client/cl_avi.c b/code/client/cl_avi.c
new file mode 100644
index 0000000..4a372d8
--- /dev/null
+++ b/code/client/cl_avi.c
@@ -0,0 +1,619 @@
+/*
+===========================================================================
+Copyright (C) 2005-2006 Tim Angus
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code 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; either version 2 of the License,
+or (at your option) any later version.
+
+Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+#include "client.h"
+#include "snd_local.h"
+
+#define MAX_RIFF_CHUNKS 16
+
+typedef struct audioFormat_s
+{
+  int rate;
+  int format;
+  int channels;
+  int bits;
+
+  int sampleSize;
+  int totalBytes;
+} audioFormat_t;
+
+typedef struct aviFileData_s
+{
+  qboolean      fileOpen;
+  fileHandle_t  f;
+  char          fileName[ MAX_QPATH ];
+  int           fileSize;
+  int           moviOffset;
+  int           moviSize;
+
+  fileHandle_t  idxF;
+  int           numIndices;
+
+  int           frameRate;
+  int           framePeriod;
+  int           width, height;
+  int           numVideoFrames;
+  int           maxRecordSize;
+  qboolean      motionJpeg;
+
+  qboolean      audio;
+  audioFormat_t a;
+  int           numAudioFrames;
+
+  int           chunkStack[ MAX_RIFF_CHUNKS ];
+  int           chunkStackTop;
+
+  byte          *cBuffer, *eBuffer;
+} aviFileData_t;
+
+static aviFileData_t afd;
+
+#define MAX_AVI_BUFFER 2048
+
+static byte buffer[ MAX_AVI_BUFFER ];
+static int  bufIndex;
+
+/*
+===============
+SafeFS_Write
+===============
+*/
+static ID_INLINE void SafeFS_Write( const void *buffer, int len, fileHandle_t f )
+{
+  if( FS_Write( buffer, len, f ) < len )
+    Com_Error( ERR_DROP, "Failed to write avi file\n" );
+}
+
+/*
+===============
+WRITE_STRING
+===============
+*/
+static ID_INLINE void WRITE_STRING( const char *s )
+{
+  Com_Memcpy( &buffer[ bufIndex ], s, strlen( s ) );
+  bufIndex += strlen( s );
+}
+
+/*
+===============
+WRITE_4BYTES
+===============
+*/
+static ID_INLINE void WRITE_4BYTES( int x )
+{
+  buffer[ bufIndex + 0 ] = (byte)( ( x >>  0 ) & 0xFF );
+  buffer[ bufIndex + 1 ] = (byte)( ( x >>  8 ) & 0xFF );
+  buffer[ bufIndex + 2 ] = (byte)( ( x >> 16 ) & 0xFF );
+  buffer[ bufIndex + 3 ] = (byte)( ( x >> 24 ) & 0xFF );
+  bufIndex += 4;
+}
+
+/*
+===============
+WRITE_2BYTES
+===============
+*/
+static ID_INLINE void WRITE_2BYTES( int x )
+{
+  buffer[ bufIndex + 0 ] = (byte)( ( x >>  0 ) & 0xFF );
+  buffer[ bufIndex + 1 ] = (byte)( ( x >>  8 ) & 0xFF );
+  bufIndex += 2;
+}
+
+/*
+===============
+WRITE_1BYTES
+===============
+*/
+static ID_INLINE void WRITE_1BYTES( int x )
+{
+  buffer[ bufIndex ] = x;
+  bufIndex += 1;
+}
+
+/*
+===============
+START_CHUNK
+===============
+*/
+static ID_INLINE void START_CHUNK( const char *s )
+{
+  if( afd.chunkStackTop == MAX_RIFF_CHUNKS )
+  {
+    Com_Error( ERR_DROP, "ERROR: Top of chunkstack breached\n" );
+  }
+
+  afd.chunkStack[ afd.chunkStackTop ] = bufIndex;
+  afd.chunkStackTop++;
+  WRITE_STRING( s );
+  WRITE_4BYTES( 0 );
+}
+
+/*
+===============
+END_CHUNK
+===============
+*/
+static ID_INLINE void END_CHUNK( void )
+{
+  int endIndex = bufIndex;
+
+  if( afd.chunkStackTop <= 0 )
+  {
+    Com_Error( ERR_DROP, "ERROR: Bottom of chunkstack breached\n" );
+  }
+
+  afd.chunkStackTop--;
+  bufIndex = afd.chunkStack[ afd.chunkStackTop ];
+  bufIndex += 4;
+  WRITE_4BYTES( endIndex - bufIndex - 1 );
+  bufIndex = endIndex;
+  bufIndex = PAD( bufIndex, 2 );
+}
+
+/*
+===============
+CL_WriteAVIHeader
+===============
+*/
+void CL_WriteAVIHeader( void )
+{
+  bufIndex = 0;
+  afd.chunkStackTop = 0;
+
+  START_CHUNK( "RIFF" );
+  {
+    WRITE_STRING( "AVI " );
+    {
+      START_CHUNK( "LIST" );
+      {
+        WRITE_STRING( "hdrl" );
+        WRITE_STRING( "avih" );
+        WRITE_4BYTES( 56 );                     //"avih" "chunk" size
+        WRITE_4BYTES( afd.framePeriod );        //dwMicroSecPerFrame
+        WRITE_4BYTES( afd.maxRecordSize *
+            afd.frameRate );                    //dwMaxBytesPerSec
+        WRITE_4BYTES( 0 );                      //dwReserved1
+        WRITE_4BYTES( 0x110 );                  //dwFlags bits HAS_INDEX and IS_INTERLEAVED
+        WRITE_4BYTES( afd.numVideoFrames );     //dwTotalFrames
+        WRITE_4BYTES( 0 );                      //dwInitialFrame
+
+        if( afd.audio )                         //dwStreams
+          WRITE_4BYTES( 2 );
+        else
+          WRITE_4BYTES( 1 );
+
+        WRITE_4BYTES( afd.maxRecordSize );      //dwSuggestedBufferSize
+        WRITE_4BYTES( afd.width );              //dwWidth
+        WRITE_4BYTES( afd.height );             //dwHeight
+        WRITE_4BYTES( 0 );                      //dwReserved[ 0 ]
+        WRITE_4BYTES( 0 );                      //dwReserved[ 1 ]
+        WRITE_4BYTES( 0 );                      //dwReserved[ 2 ]
+        WRITE_4BYTES( 0 );                      //dwReserved[ 3 ]
+
+        START_CHUNK( "LIST" );
+        {
+          WRITE_STRING( "strl" );
+          WRITE_STRING( "strh" );
+          WRITE_4BYTES( 56 );                   //"strh" "chunk" size
+          WRITE_STRING( "vids" );
+
+          if( afd.motionJpeg )
+            WRITE_STRING( "MJPG" );
+          else
+            WRITE_STRING( " BGR" );
+
+          WRITE_4BYTES( 0 );                    //dwFlags
+          WRITE_4BYTES( 0 );                    //dwPriority
+          WRITE_4BYTES( 0 );                    //dwInitialFrame
+
+          WRITE_4BYTES( 1 );                    //dwTimescale
+          WRITE_4BYTES( afd.frameRate );        //dwDataRate
+          WRITE_4BYTES( 0 );                    //dwStartTime
+          WRITE_4BYTES( afd.numVideoFrames );   //dwDataLength
+
+          WRITE_4BYTES( afd.maxRecordSize );    //dwSuggestedBufferSize
+          WRITE_4BYTES( -1 );                   //dwQuality
+          WRITE_4BYTES( 0 );                    //dwSampleSize
+          WRITE_2BYTES( 0 );                    //rcFrame
+          WRITE_2BYTES( 0 );                    //rcFrame
+          WRITE_2BYTES( afd.width );            //rcFrame
+          WRITE_2BYTES( afd.height );           //rcFrame
+
+          WRITE_STRING( "strf" );
+          WRITE_4BYTES( 40 );                   //"strf" "chunk" size
+          WRITE_4BYTES( 40 );                   //biSize
+          WRITE_4BYTES( afd.width );            //biWidth
+          WRITE_4BYTES( afd.height );           //biHeight
+          WRITE_2BYTES( 1 );                    //biPlanes
+          WRITE_2BYTES( 24 );                   //biBitCount
+
+          if( afd.motionJpeg )                        //biCompression
+            WRITE_STRING( "MJPG" );
+          else
+            WRITE_STRING( " BGR" );
+
+          WRITE_4BYTES( afd.width *
+              afd.height );                     //biSizeImage
+          WRITE_4BYTES( 0 );                    //biXPelsPetMeter
+          WRITE_4BYTES( 0 );                    //biYPelsPetMeter
+          WRITE_4BYTES( 0 );                    //biClrUsed
+          WRITE_4BYTES( 0 );                    //biClrImportant
+        }
+        END_CHUNK( );
+
+        if( afd.audio )
+        {
+          START_CHUNK( "LIST" );
+          {
+            WRITE_STRING( "strl" );
+            WRITE_STRING( "strh" );
+            WRITE_4BYTES( 56 );                 //"strh" "chunk" size
+            WRITE_STRING( "auds" );
+            WRITE_4BYTES( 0 );                  //FCC
+            WRITE_4BYTES( 0 );                  //dwFlags
+            WRITE_4BYTES( 0 );                  //dwPriority
+            WRITE_4BYTES( 0 );                  //dwInitialFrame
+
+            WRITE_4BYTES( afd.a.sampleSize );   //dwTimescale
+            WRITE_4BYTES( afd.a.sampleSize *
+                afd.a.rate );                   //dwDataRate
+            WRITE_4BYTES( 0 );                  //dwStartTime
+            WRITE_4BYTES( afd.a.totalBytes /
+                afd.a.sampleSize );             //dwDataLength
+
+            WRITE_4BYTES( 0 );                  //dwSuggestedBufferSize
+            WRITE_4BYTES( -1 );                 //dwQuality
+            WRITE_4BYTES( afd.a.sampleSize );   //dwSampleSize
+            WRITE_2BYTES( 0 );                  //rcFrame
+            WRITE_2BYTES( 0 );                  //rcFrame
+            WRITE_2BYTES( 0 );                  //rcFrame
+            WRITE_2BYTES( 0 );                  //rcFrame
+
+            WRITE_STRING( "strf" );
+            WRITE_4BYTES( 18 );                 //"strf" "chunk" size
+            WRITE_2BYTES( afd.a.format );       //wFormatTag
+            WRITE_2BYTES( afd.a.channels );     //nChannels
+            WRITE_4BYTES( afd.a.rate );         //nSamplesPerSec
+            WRITE_4BYTES( afd.a.sampleSize *
+                afd.a.rate );                   //nAvgBytesPerSec
+            WRITE_2BYTES( afd.a.sampleSize );   //nBlockAlign
+            WRITE_2BYTES( afd.a.bits );         //wBitsPerSample
+            WRITE_2BYTES( 0 );                  //cbSize
+          }
+          END_CHUNK( );
+        }
+      }
+      END_CHUNK( );
+
+      afd.moviOffset = bufIndex;
+
+      START_CHUNK( "LIST" );
+      {
+        WRITE_STRING( "movi" );
+      }
+    }
+  }
+}
+
+/*
+===============
+CL_OpenAVIForWriting
+
+Creates an AVI file and gets it into a state where
+writing the actual data can begin
+===============
+*/
+qboolean CL_OpenAVIForWriting( const char *fileName )
+{
+  if( afd.fileOpen )
+    return qfalse;
+
+  Com_Memset( &afd, 0, sizeof( aviFileData_t ) );
+
+  // Don't start if a framerate has not been chosen
+  if( cl_avidemo->integer <= 0 )
+  {
+    Com_Printf( S_COLOR_RED "cl_avidemo must be >= 1\n" );
+    return qfalse;
+  }
+
+  if( ( afd.f = FS_FOpenFileWrite( fileName ) ) <= 0 )
+    return qfalse;
+
+  if( ( afd.idxF = FS_FOpenFileWrite( va( "%s.idx", fileName ) ) ) <= 0 )
+  {
+    FS_FCloseFile( afd.f );
+    return qfalse;
+  }
+
+  Q_strncpyz( afd.fileName, fileName, MAX_QPATH );
+
+  afd.frameRate = cl_avidemo->integer;
+  afd.framePeriod = (int)( 1000000.0f / afd.frameRate );
+  afd.width = cls.glconfig.vidWidth;
+  afd.height = cls.glconfig.vidHeight;
+
+  if( cl_aviMotionJpeg->integer )
+    afd.motionJpeg = qtrue;
+  else
+    afd.motionJpeg = qfalse;
+
+  afd.cBuffer = Z_Malloc( afd.width * afd.height * 4 );
+  afd.eBuffer = Z_Malloc( afd.width * afd.height * 4 );
+
+  afd.a.rate = dma.speed;
+  afd.a.format = WAV_FORMAT_PCM;
+  afd.a.channels = dma.channels;
+  afd.a.bits = dma.samplebits;
+  afd.a.sampleSize = ( afd.a.bits / 8 ) * afd.a.channels;
+
+  if( afd.a.rate % afd.frameRate )
+  {
+    int suggestRate = afd.frameRate;
+
+    while( ( afd.a.rate % suggestRate ) && suggestRate >= 1 )
+      suggestRate--;
+
+    Com_Printf( S_COLOR_YELLOW "WARNING: cl_avidemo is not a divisor "
+        "of the audio rate, suggest %d\n", suggestRate );
+  }
+
+  if( !Cvar_VariableIntegerValue( "s_initsound" ) )
+  {
+    afd.audio = qfalse;
+  }
+  else if( Q_stricmp( Cvar_VariableString( "s_backend" ), "OpenAL" ) )
+  {
+    if( afd.a.bits == 16 && afd.a.channels == 2 )
+      afd.audio = qtrue;
+    else
+      afd.audio = qfalse; //FIXME: audio not implemented for this case
+  }
+  else
+  {
+    afd.audio = qfalse;
+    Com_Printf( S_COLOR_YELLOW "WARNING: Audio capture is not supported "
+        "with OpenAL. Set s_useOpenAL to 0 for audio capture\n" );
+  }
+
+  // This doesn't write a real header, but allocates the
+  // correct amount of space at the beginning of the file
+  CL_WriteAVIHeader( );
+
+  SafeFS_Write( buffer, bufIndex, afd.f );
+  afd.fileSize = bufIndex;
+
+  bufIndex = 0;
+  START_CHUNK( "idx1" );
+  SafeFS_Write( buffer, bufIndex, afd.idxF );
+
+  afd.moviSize = 4; // For the "movi"
+  afd.fileOpen = qtrue;
+
+  return qtrue;
+}
+
+/*
+===============
+CL_WriteAVIVideoFrame
+===============
+*/
+void CL_WriteAVIVideoFrame( const byte *imageBuffer, int size )
+{
+  int   chunkOffset = afd.fileSize - afd.moviOffset - 8;
+  int   chunkSize = 8 + size;
+  int   paddingSize = PAD( size, 2 ) - size;
+  byte  padding[ 4 ] = { 0 };
+
+  if( !afd.fileOpen )
+    return;
+
+  bufIndex = 0;
+  WRITE_STRING( "00dc" );
+  WRITE_4BYTES( size );
+
+  SafeFS_Write( buffer, 8, afd.f );
+  SafeFS_Write( imageBuffer, size, afd.f );
+  SafeFS_Write( padding, paddingSize, afd.f );
+  afd.fileSize += ( chunkSize + paddingSize );
+
+  afd.numVideoFrames++;
+  afd.moviSize += ( chunkSize + paddingSize );
+
+  if( size > afd.maxRecordSize )
+    afd.maxRecordSize = size;
+
+  // Index
+  bufIndex = 0;
+  WRITE_STRING( "00dc" );           //dwIdentifier
+  WRITE_4BYTES( 0 );                //dwFlags
+  WRITE_4BYTES( chunkOffset );      //dwOffset
+  WRITE_4BYTES( size );             //dwLength
+  SafeFS_Write( buffer, 16, afd.idxF );
+
+  afd.numIndices++;
+}
+
+#define PCM_BUFFER_SIZE 44100
+
+/*
+===============
+CL_WriteAVIAudioFrame
+===============
+*/
+void CL_WriteAVIAudioFrame( const byte *pcmBuffer, int size )
+{
+  static byte pcmCaptureBuffer[ PCM_BUFFER_SIZE ] = { 0 };
+  static int  bytesInBuffer = 0;
+
+  if( !afd.audio )
+    return;
+
+  if( !afd.fileOpen )
+    return;
+
+  if( bytesInBuffer + size > PCM_BUFFER_SIZE )
+  {
+    Com_Printf( S_COLOR_YELLOW
+        "WARNING: Audio capture buffer overflow -- truncating\n" );
+    size = PCM_BUFFER_SIZE - bytesInBuffer;
+  }
+
+  Com_Memcpy( &pcmCaptureBuffer[ bytesInBuffer ], pcmBuffer, size );
+  bytesInBuffer += size;
+
+  // Only write if we have a frame's worth of audio
+  if( bytesInBuffer >= (int)ceil( afd.a.rate / cl_avidemo->value ) *
+        afd.a.sampleSize )
+  {
+    int   chunkOffset = afd.fileSize - afd.moviOffset - 8;
+    int   chunkSize = 8 + bytesInBuffer;
+    int   paddingSize = PAD( bytesInBuffer, 2 ) - bytesInBuffer;
+    byte  padding[ 4 ] = { 0 };
+
+    bufIndex = 0;
+    WRITE_STRING( "01wb" );
+    WRITE_4BYTES( bytesInBuffer );
+
+    SafeFS_Write( buffer, 8, afd.f );
+    SafeFS_Write( pcmBuffer, bytesInBuffer, afd.f );
+    SafeFS_Write( padding, paddingSize, afd.f );
+    afd.fileSize += ( chunkSize + paddingSize );
+
+    afd.numAudioFrames++;
+    afd.moviSize += ( chunkSize + paddingSize );
+    afd.a.totalBytes =+ bytesInBuffer;
+
+    // Index
+    bufIndex = 0;
+    WRITE_STRING( "01wb" );           //dwIdentifier
+    WRITE_4BYTES( 0 );                //dwFlags
+    WRITE_4BYTES( chunkOffset );      //dwOffset
+    WRITE_4BYTES( bytesInBuffer );    //dwLength
+    SafeFS_Write( buffer, 16, afd.idxF );
+
+    afd.numIndices++;
+
+    bytesInBuffer = 0;
+  }
+}
+
+/*
+===============
+CL_TakeVideoFrame
+===============
+*/
+void CL_TakeVideoFrame( void )
+{
+  // AVI file isn't open
+  if( !afd.fileOpen )
+    return;
+
+  re.TakeVideoFrame( afd.width, afd.height,
+      afd.cBuffer, afd.eBuffer, afd.motionJpeg );
+}
+
+/*
+===============
+CL_CloseAVI
+
+Closes the AVI file and writes an index chunk
+===============
+*/
+qboolean CL_CloseAVI( void )
+{
+  int indexRemainder;
+  int indexSize = afd.numIndices * 16;
+  const char *idxFileName = va( "%s.idx", afd.fileName );
+
+  // AVI file isn't open
+  if( !afd.fileOpen )
+    return qfalse;
+
+  afd.fileOpen = qfalse;
+
+  FS_Seek( afd.idxF, 4, FS_SEEK_SET );
+  bufIndex = 0;
+  WRITE_4BYTES( indexSize );
+  SafeFS_Write( buffer, bufIndex, afd.idxF );
+  FS_FCloseFile( afd.idxF );
+
+  // Write index
+
+  // Open the temp index file
+  if( ( indexSize = FS_FOpenFileRead( idxFileName,
+          &afd.idxF, qtrue ) ) <= 0 )
+  {
+    FS_FCloseFile( afd.f );
+    return qfalse;
+  }
+
+  indexRemainder = indexSize;
+
+  // Append index to end of avi file
+  while( indexRemainder > MAX_AVI_BUFFER )
+  {
+    FS_Read( buffer, MAX_AVI_BUFFER, afd.idxF );
+    SafeFS_Write( buffer, MAX_AVI_BUFFER, afd.f );
+    afd.fileSize += MAX_AVI_BUFFER;
+    indexRemainder -= MAX_AVI_BUFFER;
+  }
+  FS_Read( buffer, indexRemainder, afd.idxF );
+  SafeFS_Write( buffer, indexRemainder, afd.f );
+  afd.fileSize += indexRemainder;
+  FS_FCloseFile( afd.idxF );
+
+  // Remove temp index file
+  FS_HomeRemove( idxFileName );
+
+  // Write the real header
+  FS_Seek( afd.f, 0, FS_SEEK_SET );
+  CL_WriteAVIHeader( );
+
+  bufIndex = 4;
+  WRITE_4BYTES( afd.fileSize - 8 ); // "RIFF" size
+
+  bufIndex = afd.moviOffset + 4;    // Skip "LIST"
+  WRITE_4BYTES( afd.moviSize );
+
+  SafeFS_Write( buffer, bufIndex, afd.f );
+
+  Z_Free( afd.cBuffer );
+  Z_Free( afd.eBuffer );
+  FS_FCloseFile( afd.f );
+
+  Com_Printf( "Wrote %d:%d frames to %s\n", afd.numVideoFrames, afd.numAudioFrames, afd.fileName );
+
+  return qtrue;
+}
+
+/*
+===============
+CL_VideoRecording
+===============
+*/
+qboolean CL_VideoRecording( void )
+{
+  return afd.fileOpen;
+}
diff --git a/code/client/cl_main.c b/code/client/cl_main.c
index 95e5f41..5f3cba8 100644
--- a/code/client/cl_main.c
+++ b/code/client/cl_main.c
@@ -44,6 +44,7 @@ cvar_t	*cl_shownet;
 cvar_t	*cl_showSend;
 cvar_t	*cl_timedemo;
 cvar_t	*cl_avidemo;
+cvar_t	*cl_aviMotionJpeg;
 cvar_t	*cl_forceavidemo;
 
 cvar_t	*cl_freelook;
@@ -773,6 +774,11 @@ void CL_Disconnect( qboolean showMainMenu ) {
 
 	// not connected to a pure server anymore
 	cl_connectedToPureServer = qfalse;
+
+	// Stop recording any video
+	if( CL_VideoRecording( ) ) {
+		CL_CloseAVI( );
+	}
 }
 
 
@@ -1189,6 +1195,11 @@ doesn't know what graphics to reload
 */
 void CL_Vid_Restart_f( void ) {
 
+	// Settings may have changed so stop recording now
+	if( CL_VideoRecording( ) ) {
+		CL_CloseAVI( );
+	}
+
 	// don't let them loop during the restart
 	S_StopAllSounds();
 	// shutdown the UI
@@ -2014,15 +2025,16 @@ void CL_Frame ( int msec ) {
 	}
 
 	// if recording an avi, lock to a fixed fps
-	if ( cl_avidemo->integer && msec) {
+	if ( CL_VideoRecording( ) && cl_avidemo->integer && msec) {
 		// save the current screen
 		if ( cls.state == CA_ACTIVE || cl_forceavidemo->integer) {
-			Cbuf_ExecuteText( EXEC_NOW, "screenshot silent\n" );
-		}
-		// fixed time for next frame'
-		msec = (1000 / cl_avidemo->integer) * com_timescale->value;
-		if (msec == 0) {
-			msec = 1;
+			CL_TakeVideoFrame( );
+
+			// fixed time for next frame'
+			msec = (int)ceil( (1000.0f / cl_avidemo->value) * com_timescale->value );
+			if (msec == 0) {
+				msec = 1;
+			}
 		}
 	}
 	
@@ -2222,6 +2234,8 @@ void CL_InitRef( void ) {
 	ri.CIN_UploadCinematic = CIN_UploadCinematic;
 	ri.CIN_PlayCinematic = CIN_PlayCinematic;
 	ri.CIN_RunCinematic = CIN_RunCinematic;
+  
+	ri.CL_WriteAVIVideoFrame = CL_WriteAVIVideoFrame;
 
 	ret = GetRefAPI( REF_API_VERSION, &ri );
 
@@ -2259,6 +2273,72 @@ void CL_SetModel_f( void ) {
 	}
 }
 
+
+//===========================================================================================
+
+
+/*
+===============
+CL_Video_f
+
+video
+video [filename]
+===============
+*/
+void CL_Video_f( void )
+{
+  char  filename[ MAX_OSPATH ];
+  int   i, last;
+
+  if( Cmd_Argc( ) == 2 )
+  {
+    // explicit filename
+    Com_sprintf( filename, MAX_OSPATH, "videos/%s.avi", Cmd_Argv( 1 ) );
+  }
+  else
+  {
+    // scan for a free filename
+    for( i = 0; i <= 9999; i++ )
+    {
+      int a, b, c, d;
+
+      last = i;
+
+      a = last / 1000;
+      last -= a * 1000;
+      b = last / 100;
+      last -= b * 100;
+      c = last / 10;
+      last -= c * 10;
+      d = last;
+
+      Com_sprintf( filename, MAX_OSPATH, "videos/video%d%d%d%d.avi",
+          a, b, c, d );
+
+      if( !FS_FileExists( filename ) )
+        break; // file doesn't exist
+    }
+
+    if( i > 9999 )
+    {
+      Com_Printf( S_COLOR_RED "ERROR: no free file names to create video\n" );
+      return;
+    }
+  }
+
+  CL_OpenAVIForWriting( filename );
+}
+
+/*
+===============
+CL_StopVideo_f
+===============
+*/
+void CL_StopVideo_f( void )
+{
+  CL_CloseAVI( );
+}
+
 /*
 ====================
 CL_Init
@@ -2294,7 +2374,8 @@ void CL_Init( void ) {
 	cl_activeAction = Cvar_Get( "activeAction", "", CVAR_TEMP );
 
 	cl_timedemo = Cvar_Get ("timedemo", "0", 0);
-	cl_avidemo = Cvar_Get ("cl_avidemo", "0", 0);
+	cl_avidemo = Cvar_Get ("cl_avidemo", "25", CVAR_ARCHIVE);
+	cl_aviMotionJpeg = Cvar_Get ("cl_aviMotionJpeg", "1", CVAR_ARCHIVE);
 	cl_forceavidemo = Cvar_Get ("cl_forceavidemo", "0", 0);
 
 	rconAddress = Cvar_Get ("rconAddress", "", 0);
@@ -2395,6 +2476,8 @@ void CL_Init( void ) {
 	Cmd_AddCommand ("fs_openedList", CL_OpenedPK3List_f );
 	Cmd_AddCommand ("fs_referencedList", CL_ReferencedPK3List_f );
 	Cmd_AddCommand ("model", CL_SetModel_f );
+	Cmd_AddCommand ("video", CL_Video_f );
+	Cmd_AddCommand ("stopvideo", CL_StopVideo_f );
 	CL_InitRef();
 
 	SCR_Init ();
@@ -2450,6 +2533,8 @@ void CL_Shutdown( void ) {
 	Cmd_RemoveCommand ("serverstatus");
 	Cmd_RemoveCommand ("showip");
 	Cmd_RemoveCommand ("model");
+	Cmd_RemoveCommand ("video");
+	Cmd_RemoveCommand ("stopvideo");
 
 	Cvar_Set( "cl_running", "0" );
 
diff --git a/code/client/client.h b/code/client/client.h
index 81cf996..946b259 100644
--- a/code/client/client.h
+++ b/code/client/client.h
@@ -343,6 +343,8 @@ extern	cvar_t	*m_side;
 extern	cvar_t	*m_filter;
 
 extern	cvar_t	*cl_timedemo;
+extern	cvar_t	*cl_avidemo;
+extern	cvar_t	*cl_aviMotionJpeg;
 
 extern	cvar_t	*cl_activeAction;
 
@@ -518,3 +520,13 @@ void LAN_SaveServersToCache( void );
 void CL_Netchan_Transmit( netchan_t *chan, msg_t* msg);	//int length, const byte *data );
 void CL_Netchan_TransmitNextFragment( netchan_t *chan );
 qboolean CL_Netchan_Process( netchan_t *chan, msg_t *msg );
+
+//
+// cl_avi.c
+//
+qboolean CL_OpenAVIForWriting( const char *filename );
+void CL_TakeVideoFrame( void );
+void CL_WriteAVIVideoFrame( const byte *imageBuffer, int size );
+void CL_WriteAVIAudioFrame( const byte *pcmBuffer, int size );
+qboolean CL_CloseAVI( void );
+qboolean CL_VideoRecording( void );
diff --git a/code/client/snd_dma.c b/code/client/snd_dma.c
index 3977703..0505403 100644
--- a/code/client/snd_dma.c
+++ b/code/client/snd_dma.c
@@ -1139,6 +1139,12 @@ void S_GetSoundtime(void)
 	
 	fullsamples = dma.samples / dma.channels;
 
+	if( CL_VideoRecording( ) )
+	{
+		s_soundtime += (int)ceil( dma.speed / cl_avidemo->value );
+		return;
+	}
+
 	// it is possible to miscount buffers if it has wrapped twice between
 	// calls to S_Update.  Oh well.
 	samplepos = SNDDMA_GetDMAPos();
diff --git a/code/client/snd_main.c b/code/client/snd_main.c
index cbb87f5..2e739da 100644
--- a/code/client/snd_main.c
+++ b/code/client/snd_main.c
@@ -29,6 +29,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 cvar_t *s_volume;
 cvar_t *s_musicVolume;
 cvar_t *s_doppler;
+cvar_t *s_backend;
 
 static soundInterface_t si;
 
@@ -370,6 +371,7 @@ void S_Init( void )
 	s_volume = Cvar_Get( "s_volume", "0.8", CVAR_ARCHIVE );
 	s_musicVolume = Cvar_Get( "s_musicvolume", "0.25", CVAR_ARCHIVE );
 	s_doppler = Cvar_Get( "s_doppler", "1", CVAR_ARCHIVE );
+	s_backend = Cvar_Get( "s_backend", "", CVAR_ROM );
 
 	cv = Cvar_Get( "s_initsound", "1", 0 );
 	if( !cv->integer ) {
@@ -388,10 +390,12 @@ void S_Init( void )
 		if( cv->integer ) {
 			//OpenAL
 			started = S_AL_Init( &si );
+			Cvar_Set( "s_backend", "OpenAL" );
 		}
 
 		if( !started ) {
 			started = S_Base_Init( &si );
+			Cvar_Set( "s_backend", "base" );
 		}
 
 		if( started ) {
diff --git a/code/client/snd_mix.c b/code/client/snd_mix.c
index c1ad06b..47d5ba5 100644
--- a/code/client/snd_mix.c
+++ b/code/client/snd_mix.c
@@ -21,6 +21,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
 // snd_mix.c -- portable code to mix sounds for snd_dma.c
 
+#include "client.h"
 #include "snd_local.h"
 #if idppc_altivec && !defined(MACOS_X)
 #include <altivec.h>
@@ -137,6 +138,9 @@ void S_TransferStereo16 (unsigned long *pbuf, int endtime)
 
 		snd_p += snd_linear_count;
 		ls_paintedtime += (snd_linear_count>>1);
+
+		if( CL_VideoRecording( ) )
+			CL_WriteAVIAudioFrame( (byte *)snd_out, snd_linear_count << 1 );
 	}
 }
 
diff --git a/code/qcommon/files.c b/code/qcommon/files.c
index 5cd8c81..8f4779d 100644
--- a/code/qcommon/files.c
+++ b/code/qcommon/files.c
@@ -565,11 +565,22 @@ FS_Remove
 
 ===========
 */
-static void FS_Remove( const char *osPath ) {
+void FS_Remove( const char *osPath ) {
 	remove( osPath );
 }
 
 /*
+===========
+FS_HomeRemove
+
+===========
+*/
+void FS_HomeRemove( const char *homePath ) {
+	remove( FS_BuildOSPath( fs_homepath->string,
+			fs_gamedir, homePath ) );
+}
+
+/*
 ================
 FS_FileExists
 
diff --git a/code/qcommon/qcommon.h b/code/qcommon/qcommon.h
index 01f4564..de86d25 100644
--- a/code/qcommon/qcommon.h
+++ b/code/qcommon/qcommon.h
@@ -654,6 +654,9 @@ qboolean FS_ComparePaks( char *neededpaks, int len, qboolean dlstring );
 
 void FS_Rename( const char *from, const char *to );
 
+void FS_Remove( const char *osPath );
+void FS_HomeRemove( const char *homePath );
+
 /*
 ==============================================================
 
@@ -899,7 +902,6 @@ void S_ClearSoundBuffer( void );
 
 void SCR_DebugGraph (float value, int color);	// FIXME: move logging to common?
 
-
 //
 // server interface
 //
diff --git a/code/renderer/tr_backend.c b/code/renderer/tr_backend.c
index 6c93c14..2061dd8 100644
--- a/code/renderer/tr_backend.c
+++ b/code/renderer/tr_backend.c
@@ -1081,6 +1081,9 @@ void RB_ExecuteRenderCommands( const void *data ) {
 		case RC_SCREENSHOT:
 			data = RB_TakeScreenshotCmd( data );
 			break;
+		case RC_VIDEOFRAME:
+			data = RB_TakeVideoFrameCmd( data );
+			break;
 
 		case RC_END_OF_LIST:
 		default:
diff --git a/code/renderer/tr_cmds.c b/code/renderer/tr_cmds.c
index 54f8150..3be865c 100644
--- a/code/renderer/tr_cmds.c
+++ b/code/renderer/tr_cmds.c
@@ -445,3 +445,30 @@ void RE_EndFrame( int *frontEndMsec, int *backEndMsec ) {
 	backEnd.pc.msec = 0;
 }
 
+/*
+=============
+RE_TakeVideoFrame
+=============
+*/
+void RE_TakeVideoFrame( int width, int height,
+		byte *captureBuffer, byte *encodeBuffer, qboolean motionJpeg )
+{
+	videoFrameCommand_t	*cmd;
+
+	if( !tr.registered ) {
+		return;
+	}
+
+	cmd = R_GetCommandBuffer( sizeof( *cmd ) );
+	if( !cmd ) {
+		return;
+	}
+
+	cmd->commandId = RC_VIDEOFRAME;
+
+	cmd->width = width;
+	cmd->height = height;
+	cmd->captureBuffer = captureBuffer;
+	cmd->encodeBuffer = encodeBuffer;
+	cmd->motionJpeg = motionJpeg;
+}
diff --git a/code/renderer/tr_image.c b/code/renderer/tr_image.c
index 15d6c7e..c227388 100644
--- a/code/renderer/tr_image.c
+++ b/code/renderer/tr_image.c
@@ -1852,6 +1852,64 @@ void SaveJPG(char * filename, int quality, int image_width, int image_height, un
   /* And we're done! */
 }
 
+/*
+=================
+SaveJPGToBuffer
+=================
+*/
+int SaveJPGToBuffer( byte *buffer, int quality,
+    int image_width, int image_height,
+    byte *image_buffer )
+{
+  struct jpeg_compress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+  JSAMPROW row_pointer[1];	/* pointer to JSAMPLE row[s] */
+  int row_stride;		/* physical row width in image buffer */
+
+  /* Step 1: allocate and initialize JPEG compression object */
+  cinfo.err = jpeg_std_error(&jerr);
+  /* Now we can initialize the JPEG compression object. */
+  jpeg_create_compress(&cinfo);
+
+  /* Step 2: specify data destination (eg, a file) */
+  /* Note: steps 2 and 3 can be done in either order. */
+  jpegDest(&cinfo, buffer, image_width*image_height*4);
+
+  /* Step 3: set parameters for compression */
+  cinfo.image_width = image_width; 	/* image width and height, in pixels */
+  cinfo.image_height = image_height;
+  cinfo.input_components = 4;		/* # of color components per pixel */
+  cinfo.in_color_space = JCS_RGB; 	/* colorspace of input image */
+
+  jpeg_set_defaults(&cinfo);
+  jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
+
+  /* Step 4: Start compressor */
+  jpeg_start_compress(&cinfo, TRUE);
+
+  /* Step 5: while (scan lines remain to be written) */
+  /*           jpeg_write_scanlines(...); */
+  row_stride = image_width * 4;	/* JSAMPLEs per row in image_buffer */
+
+  while (cinfo.next_scanline < cinfo.image_height) {
+    /* jpeg_write_scanlines expects an array of pointers to scanlines.
+     * Here the array is only one element long, but you could pass
+     * more than one scanline at a time if that's more convenient.
+     */
+    row_pointer[0] = & image_buffer[((cinfo.image_height-1)*row_stride)-cinfo.next_scanline * row_stride];
+    (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
+  }
+
+  /* Step 6: Finish compression */
+  jpeg_finish_compress(&cinfo);
+
+  /* Step 7: release JPEG compression object */
+  jpeg_destroy_compress(&cinfo);
+
+  /* And we're done! */
+  return hackSize;
+}
+
 //===================================================================
 
 /*
diff --git a/code/renderer/tr_init.c b/code/renderer/tr_init.c
index ffdd997..285ed18 100644
--- a/code/renderer/tr_init.c
+++ b/code/renderer/tr_init.c
@@ -700,6 +700,51 @@ void R_ScreenShotJPEG_f (void) {
 //============================================================================
 
 /*
+==================
+RB_TakeVideoFrameCmd
+==================
+*/
+const void *RB_TakeVideoFrameCmd( const void *data )
+{
+	const videoFrameCommand_t	*cmd;
+	int												frameSize;
+	int												i;
+	
+	cmd = (const videoFrameCommand_t *)data;
+	
+	qglReadPixels( 0, 0, cmd->width, cmd->height, GL_RGBA,
+			GL_UNSIGNED_BYTE, cmd->captureBuffer );
+
+	// gamma correct
+	if( ( tr.overbrightBits > 0 ) && glConfig.deviceSupportsGamma )
+		R_GammaCorrect( cmd->captureBuffer, cmd->width * cmd->height * 4 );
+
+	if( cmd->motionJpeg )
+	{
+		frameSize = SaveJPGToBuffer( cmd->encodeBuffer, 95,
+				cmd->width, cmd->height, cmd->captureBuffer );
+	}
+	else
+	{
+		frameSize = cmd->width * cmd->height * 4;
+
+		// Vertically flip the image
+		for( i = 0; i < cmd->height; i++ )
+		{
+			Com_Memcpy( &cmd->encodeBuffer[ i * ( cmd->width * 4 ) ],
+					&cmd->captureBuffer[ ( cmd->height - i - 1 ) * ( cmd->width * 4 ) ],
+					cmd->width * 4 );
+		}
+	}
+
+	ri.CL_WriteAVIVideoFrame( cmd->encodeBuffer, frameSize );
+
+	return (const void *)(cmd + 1);	
+}
+
+//============================================================================
+
+/*
 ** GL_SetDefaultState
 */
 void GL_SetDefaultState( void )
@@ -1201,5 +1246,7 @@ refexport_t *GetRefAPI ( int apiVersion, refimport_t *rimp ) {
 	re.GetEntityToken = R_GetEntityToken;
 	re.inPVS = R_inPVS;
 
+	re.TakeVideoFrame = RE_TakeVideoFrame;
+
 	return &re;
 }
diff --git a/code/renderer/tr_local.h b/code/renderer/tr_local.h
index 865128f..1b47f96 100644
--- a/code/renderer/tr_local.h
+++ b/code/renderer/tr_local.h
@@ -1215,6 +1215,7 @@ skin_t	*R_GetSkinByHandle( qhandle_t hSkin );
 
 int R_ComputeLOD( trRefEntity_t *ent );
 
+const void *RB_TakeVideoFrameCmd( const void *data );
 
 //
 // tr_shader.c
@@ -1579,6 +1580,15 @@ typedef struct {
 	qboolean jpeg;
 } screenshotCommand_t;
 
+typedef struct {
+	int						commandId;
+	int						width;
+	int						height;
+	byte					*captureBuffer;
+	byte					*encodeBuffer;
+	qboolean			motionJpeg;
+} videoFrameCommand_t;
+
 typedef enum {
 	RC_END_OF_LIST,
 	RC_SET_COLOR,
@@ -1586,7 +1596,8 @@ typedef enum {
 	RC_DRAW_SURFS,
 	RC_DRAW_BUFFER,
 	RC_SWAP_BUFFERS,
-	RC_SCREENSHOT
+	RC_SCREENSHOT,
+	RC_VIDEOFRAME
 } renderCommand_t;
 
 
@@ -1635,6 +1646,11 @@ void RE_StretchPic ( float x, float y, float w, float h,
 void RE_BeginFrame( stereoFrame_t stereoFrame );
 void RE_EndFrame( int *frontEndMsec, int *backEndMsec );
 void SaveJPG(char * filename, int quality, int image_width, int image_height, unsigned char *image_buffer);
+int SaveJPGToBuffer( byte *buffer, int quality,
+		int image_width, int image_height,
+		byte *image_buffer );
+void RE_TakeVideoFrame( int width, int height,
+		byte *captureBuffer, byte *encodeBuffer, qboolean motionJpeg );
 
 // font stuff
 void R_InitFreeType( void );
diff --git a/code/renderer/tr_public.h b/code/renderer/tr_public.h
index 9752305..6cefe16 100644
--- a/code/renderer/tr_public.h
+++ b/code/renderer/tr_public.h
@@ -97,6 +97,8 @@ typedef struct {
 	void	(*RemapShader)(const char *oldShader, const char *newShader, const char *offsetTime);
 	qboolean (*GetEntityToken)( char *buffer, int size );
 	qboolean (*inPVS)( const vec3_t p1, const vec3_t p2 );
+
+	void (*TakeVideoFrame)( int h, int w, byte* captureBuffer, byte *encodeBuffer, qboolean motionJpeg );
 } refexport_t;
 
 //
@@ -156,6 +158,7 @@ typedef struct {
 	int		(*CIN_PlayCinematic)( const char *arg0, int xpos, int ypos, int width, int height, int bits);
 	e_status (*CIN_RunCinematic) (int handle);
 
+	void	(*CL_WriteAVIVideoFrame)( const byte *buffer, int size );
 } refimport_t;
 
 
diff --git a/code/unix/Makefile b/code/unix/Makefile
index cd78eba..cd0039d 100644
--- a/code/unix/Makefile
+++ b/code/unix/Makefile
@@ -684,6 +684,7 @@ Q3OBJ = \
   $(B)/client/cl_parse.o \
   $(B)/client/cl_scrn.o \
   $(B)/client/cl_ui.o \
+  $(B)/client/cl_avi.o \
   \
   $(B)/client/cm_load.o \
   $(B)/client/cm_patch.o \
@@ -908,6 +909,7 @@ $(B)/client/cl_net_chan.o : $(CDIR)/cl_net_chan.c; $(DO_CC)
 $(B)/client/cl_parse.o : $(CDIR)/cl_parse.c; $(DO_CC)
 $(B)/client/cl_scrn.o : $(CDIR)/cl_scrn.c; $(DO_CC)
 $(B)/client/cl_ui.o : $(CDIR)/cl_ui.c; $(DO_CC)
+$(B)/client/cl_avi.o : $(CDIR)/cl_avi.c; $(DO_CC)
 $(B)/client/snd_adpcm.o : $(CDIR)/snd_adpcm.c; $(DO_CC)
 $(B)/client/snd_dma.o : $(CDIR)/snd_dma.c; $(DO_CC)
 $(B)/client/snd_mem.o : $(CDIR)/snd_mem.c; $(DO_CC)