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lilium-voyager/code/client/cl_avi.c
Ryan C. Gordon 4f8c7c2f2f Support SDL audio devices that require float32 samples. 
Fixes missing audio when playing on Windows with SDL 2.0.7, which started
using WASAPI, which demands floating point audio.
2018-04-13 14:05:12 -04:00

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/*
===========================================================================
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 INDEX_FILE_EXTENSION ".index.dat"
#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" );
}
/*
===============
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;
}
/*
===============
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" );
}
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" );
}
afd.chunkStackTop--;
bufIndex = afd.chunkStack[ afd.chunkStackTop ];
bufIndex += 4;
WRITE_4BYTES( endIndex - bufIndex - 4 );
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_4BYTES( 0 ); // BI_RGB
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" );
WRITE_4BYTES( afd.width *
afd.height ); //biSizeImage
}
else
{
WRITE_4BYTES( 0 ); // BI_RGB
WRITE_4BYTES( afd.width *
afd.height * 3 ); //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_aviFrameRate->integer <= 0 )
{
Com_Printf( S_COLOR_RED "cl_aviFrameRate must be >= 1\n" );
return qfalse;
}
if( ( afd.f = FS_FOpenFileWrite( fileName ) ) <= 0 )
return qfalse;
if( ( afd.idxF = FS_FOpenFileWrite(
va( "%s" INDEX_FILE_EXTENSION, fileName ) ) ) <= 0 )
{
FS_FCloseFile( afd.f );
return qfalse;
}
Q_strncpyz( afd.fileName, fileName, MAX_QPATH );
afd.frameRate = cl_aviFrameRate->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;
// Buffers only need to store RGB pixels.
// Allocate a bit more space for the capture buffer to account for possible
// padding at the end of pixel lines, and padding for alignment
#define MAX_PACK_LEN 16
afd.cBuffer = Z_Malloc((afd.width * 3 + MAX_PACK_LEN - 1) * afd.height + MAX_PACK_LEN - 1);
// raw avi files have pixel lines start on 4-byte boundaries
afd.eBuffer = Z_Malloc(PAD(afd.width * 3, AVI_LINE_PADDING) * afd.height);
afd.a.rate = dma.speed;
afd.a.format = WAV_FORMAT_PCM;
afd.a.channels = dma.channels;
/* !!! FIXME: if CL_WriteAVIAudioFrame() is ever called from somewhere other
!!! FIXME: than S_TransferStereo16(), we will need to handle/convert
!!! FIXME: float32 samples for AVI writing. */
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_aviFrameRate 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 )
{
Com_Printf( S_COLOR_YELLOW "WARNING: Audio format of %d bit/%d channels not supported",
afd.a.bits, afd.a.channels );
afd.audio = qfalse;
}
else
afd.audio = qtrue;
}
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_CheckFileSize
===============
*/
static qboolean CL_CheckFileSize( int bytesToAdd )
{
unsigned int newFileSize;
newFileSize =
afd.fileSize + // Current file size
bytesToAdd + // What we want to add
( afd.numIndices * 16 ) + // The index
4; // The index size
// I assume all the operating systems
// we target can handle a 2Gb file
if( newFileSize > INT_MAX )
{
// Close the current file...
CL_CloseAVI( );
// ...And open a new one
CL_OpenAVIForWriting( va( "%s_", afd.fileName ) );
return qtrue;
}
return qfalse;
}
/*
===============
CL_WriteAVIVideoFrame
===============
*/
void CL_WriteAVIVideoFrame( const byte *imageBuffer, int size )
{
int chunkOffset = afd.fileSize - afd.moviOffset - 8;
int chunkSize = 8 + size;
int paddingSize = PADLEN(size, 2);
byte padding[ 4 ] = { 0 };
if( !afd.fileOpen )
return;
// Chunk header + contents + padding
if( CL_CheckFileSize( 8 + size + 2 ) )
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( 0x00000010 ); //dwFlags (all frames are KeyFrames)
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;
// Chunk header + contents + padding
if( CL_CheckFileSize( 8 + bytesInBuffer + size + 2 ) )
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( (float)afd.a.rate / (float)afd.frameRate ) *
afd.a.sampleSize )
{
int chunkOffset = afd.fileSize - afd.moviOffset - 8;
int chunkSize = 8 + bytesInBuffer;
int paddingSize = PADLEN(bytesInBuffer, 2);
byte padding[ 4 ] = { 0 };
bufIndex = 0;
WRITE_STRING( "01wb" );
WRITE_4BYTES( bytesInBuffer );
SafeFS_Write( buffer, 8, afd.f );
SafeFS_Write( pcmCaptureBuffer, 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" INDEX_FILE_EXTENSION, 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;
}
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