snes9x/win32/AVIOutput.cpp

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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
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/*
Win32 AVI Output module
(c) 2004 blip
*/
#include <windows.h>
#include <vfw.h>
#include "wsnes9x.h" // for GUI.hWnd
#include "AVIOutput.h"
#define VIDEO_STREAM 0
#define AUDIO_STREAM 1
struct AVIFile
{
bool valid;
int fps;
int frameskip;
bool video_added;
BITMAPINFOHEADER bitmap_format;
bool sound_added;
WAVEFORMATEX wave_format;
AVISTREAMINFO avi_video_header;
AVISTREAMINFO avi_sound_header;
PAVIFILE avi_file;
PAVISTREAM streams[2];
PAVISTREAM compressed_streams[2];
AVICOMPRESSOPTIONS compress_options[2];
AVICOMPRESSOPTIONS* compress_options_ptr[2];
int video_frames;
int sound_samples;
long tBytes, ByteBuffer;
};
static TCHAR saved_cur_avi_fnameandext[MAX_PATH];
static TCHAR saved_avi_fname[MAX_PATH];
static TCHAR saved_avi_ext[MAX_PATH];
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static int avi_segnum=0;
static struct AVIFile saved_avi_info;
static int use_prev_options=0;
static bool truncate_existing(const TCHAR* filename)
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{
// this is only here because AVIFileOpen doesn't seem to do it for us
FILE* fd = _tfopen(filename, TEXT("wb"));
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if(fd)
{
fclose(fd);
return true;
}
return false;
}
static void clean_up(AVIFile* _avi)
{
AVIFile& avi = *_avi;
if(avi.sound_added)
{
if(avi.compressed_streams[AUDIO_STREAM])
{
AVIStreamClose(avi.compressed_streams[AUDIO_STREAM]);
avi.compressed_streams[AUDIO_STREAM] = NULL;
avi.streams[AUDIO_STREAM] = NULL; // compressed_streams[AUDIO_STREAM] is just a copy of streams[AUDIO_STREAM]
}
}
if(avi.video_added)
{
if(avi.compressed_streams[VIDEO_STREAM])
{
AVIStreamClose(avi.compressed_streams[VIDEO_STREAM]);
avi.compressed_streams[VIDEO_STREAM] = NULL;
}
if(avi.streams[VIDEO_STREAM])
{
AVIStreamClose(avi.streams[VIDEO_STREAM]);
avi.streams[VIDEO_STREAM] = NULL;
}
}
if(avi.avi_file)
{
AVIFileClose(avi.avi_file);
avi.avi_file = NULL;
}
}
#ifdef __cplusplus
extern "C" {
#endif
void AVICreate(struct AVIFile** avi_out)
{
*avi_out = new AVIFile;
memset(*avi_out, 0, sizeof(AVIFile));
AVIFileInit();
}
void AVIClose(struct AVIFile** avi_out)
{
if(*avi_out)
{
clean_up(*avi_out);
delete *avi_out;
}
*avi_out = NULL;
AVIFileExit();
}
void AVISetFramerate(const int fps, const int frameskip, struct AVIFile* avi_out)
{
avi_out->fps = fps;
avi_out->frameskip = frameskip;
}
void AVISetVideoFormat(const BITMAPINFOHEADER* bitmap_format, struct AVIFile* avi_out)
{
memcpy(&(avi_out->bitmap_format), bitmap_format, sizeof(BITMAPINFOHEADER));
avi_out->video_added = true;
}
void AVISetSoundFormat(const WAVEFORMATEX* wave_format, struct AVIFile* avi_out)
{
memcpy(&(avi_out->wave_format), wave_format, sizeof(WAVEFORMATEX));
avi_out->sound_added = true;
}
int AVIBegin(const TCHAR* filename, struct AVIFile* _avi_out)
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{
AVIFile& avi = *_avi_out;
int result = 0;
do
{
if(!avi.video_added)
break;
if(!truncate_existing(filename))
break;
// open the file
if(FAILED(AVIFileOpen(&avi.avi_file, filename, OF_CREATE | OF_WRITE, NULL)))
break;
// create the video stream
memset(&avi.avi_video_header, 0, sizeof(AVISTREAMINFO));
avi.avi_video_header.fccType = streamtypeVIDEO;
avi.avi_video_header.dwScale = avi.frameskip;
avi.avi_video_header.dwRate = avi.fps;
avi.avi_video_header.dwSuggestedBufferSize = avi.bitmap_format.biSizeImage;
if(FAILED(AVIFileCreateStream(avi.avi_file, &avi.streams[VIDEO_STREAM], &avi.avi_video_header)))
break;
if(use_prev_options)
{
avi.compress_options[VIDEO_STREAM] = saved_avi_info.compress_options[VIDEO_STREAM];
avi.compress_options_ptr[VIDEO_STREAM] = &avi.compress_options[0];
}
else
{
// get compression options
memset(&avi.compress_options[VIDEO_STREAM], 0, sizeof(AVICOMPRESSOPTIONS));
avi.compress_options_ptr[VIDEO_STREAM] = &avi.compress_options[0];
if(!AVISaveOptions(GUI.hWnd, 0, 1, &avi.streams[VIDEO_STREAM], &avi.compress_options_ptr[VIDEO_STREAM]))
break;
}
// create compressed stream
if(FAILED(AVIMakeCompressedStream(&avi.compressed_streams[VIDEO_STREAM], avi.streams[VIDEO_STREAM], &avi.compress_options[VIDEO_STREAM], NULL)))
break;
// set the stream format
if(FAILED(AVIStreamSetFormat(avi.compressed_streams[VIDEO_STREAM], 0, (void*)&avi.bitmap_format, avi.bitmap_format.biSize)))
break;
// add sound (if requested)
if(avi.sound_added)
{
// create the audio stream
memset(&avi.avi_sound_header, 0, sizeof(AVISTREAMINFO));
avi.avi_sound_header.fccType = streamtypeAUDIO;
avi.avi_sound_header.dwQuality = (DWORD)-1;
avi.avi_sound_header.dwScale = avi.wave_format.nBlockAlign;
avi.avi_sound_header.dwRate = avi.wave_format.nAvgBytesPerSec;
avi.avi_sound_header.dwSampleSize = avi.wave_format.nBlockAlign;
avi.avi_sound_header.dwInitialFrames = 1;
if(FAILED(AVIFileCreateStream(avi.avi_file, &avi.streams[AUDIO_STREAM], &avi.avi_sound_header)))
break;
// AVISaveOptions doesn't seem to work for audio streams
// so here we just copy the pointer for the compressed stream
avi.compressed_streams[AUDIO_STREAM] = avi.streams[AUDIO_STREAM];
// set the stream format
if(FAILED(AVIStreamSetFormat(avi.compressed_streams[AUDIO_STREAM], 0, (void*)&avi.wave_format, sizeof(WAVEFORMATEX))))
break;
}
// initialize counters
avi.video_frames = 0;
avi.sound_samples = 0;
avi.tBytes = 0;
avi.ByteBuffer = 0;
lstrcpyn(saved_cur_avi_fnameandext,filename,MAX_PATH);
lstrcpyn(saved_avi_fname,filename,MAX_PATH);
TCHAR* dot = _tcsrchr(saved_avi_fname, TEXT('.'));
if(dot && dot > _tcsrchr(saved_avi_fname, TEXT('/')) && dot > _tcsrchr(saved_avi_fname, TEXT('\\')))
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{
lstrcpy(saved_avi_ext,dot);
dot[0]=TEXT('\0');
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}
// success
result = 1;
avi.valid = true;
} while(false);
if(!result)
{
clean_up(&avi);
avi.valid = false;
}
return result;
}
int AVIGetVideoFormat(const struct AVIFile* avi_out, const BITMAPINFOHEADER** ppFormat)
{
if(!avi_out->valid ||
!avi_out->video_added)
{
if(ppFormat)
{
*ppFormat = NULL;
}
return 0;
}
if(ppFormat)
{
*ppFormat = &avi_out->bitmap_format;
}
return 1;
}
int AVIGetSoundFormat(const struct AVIFile* avi_out, const WAVEFORMATEX** ppFormat)
{
if(!avi_out->valid ||
!avi_out->sound_added)
{
if(ppFormat)
{
*ppFormat = NULL;
}
return 0;
}
if(ppFormat)
{
*ppFormat = &avi_out->wave_format;
}
return 1;
}
static int AVINextSegment(struct AVIFile* avi_out)
{
TCHAR avi_fname[MAX_PATH];
lstrcpy(avi_fname,saved_avi_fname);
TCHAR avi_fname_temp[MAX_PATH];
_stprintf(avi_fname_temp, TEXT("%s_part%d%s"), avi_fname, avi_segnum+2, saved_avi_ext);
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saved_avi_info=*avi_out;
use_prev_options=1;
avi_segnum++;
clean_up(avi_out);
int ret = AVIBegin(avi_fname_temp, avi_out);
use_prev_options=0;
lstrcpy(saved_avi_fname,avi_fname);
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return ret;
}
void AVIAddVideoFrame(void* bitmap_data, struct AVIFile* avi_out)
{
if(!avi_out->valid ||
!avi_out->video_added)
{
return;
}
if(FAILED(AVIStreamWrite(avi_out->compressed_streams[VIDEO_STREAM],
avi_out->video_frames,
1,
bitmap_data,
avi_out->bitmap_format.biSizeImage,
AVIIF_KEYFRAME, NULL, &avi_out->ByteBuffer)))
{
avi_out->valid = false;
return;
}
avi_out->video_frames++;
avi_out->tBytes += avi_out->ByteBuffer;
// segment / split AVI when it's almost 2 GB (2000MB, to be precise)
if(!(avi_out->video_frames % 60) && avi_out->tBytes > 2097152000)
AVINextSegment(avi_out);
}
void AVIAddSoundSamples(void* sound_data, const int num_samples, struct AVIFile* avi_out)
{
if(!avi_out->valid ||
!avi_out->sound_added)
{
return;
}
int data_length = num_samples * avi_out->wave_format.nBlockAlign;
if(FAILED(AVIStreamWrite(avi_out->compressed_streams[AUDIO_STREAM],
avi_out->sound_samples,
num_samples,
sound_data,
data_length,
0, NULL, &avi_out->ByteBuffer)))
{
avi_out->valid = false;
return;
}
avi_out->sound_samples += num_samples;
avi_out->tBytes += avi_out->ByteBuffer;
}
#ifdef __cplusplus
}
#endif