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/*
SMPEG - SDL MPEG Player Library
Copyright (C) 1999 Loki Entertainment Software
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* This is the C interface to the SMPEG library */
#include "MPEG.h"
#include "smpeg.h"
extern "C" {
/* This is the actual SMPEG object */
struct _SMPEG {
MPEGfile *obj;
};
/* Create a new SMPEG object from an MPEG file.
On return, if 'info' is not NULL, it will be filled with information
about the MPEG object.
This function returns a new SMPEG object. Use SMPEG_error() to find out
whether or not there was a problem building the MPEG stream.
The sdl_audio parameter indicates if SMPEG should initialize the SDL audio
subsystem. If not, you will have to use the SMPEG_playaudio() function below
to extract the decoded data.
*/
SMPEG* SMPEG_new(const char *file, SMPEG_Info* info, int sdl_audio)
{
SMPEG *mpeg;
/* Create a new SMPEG object! */
mpeg = new SMPEG;
mpeg->obj = new MPEGfile(file, sdl_audio);
/* Find out the details of the stream, if requested */
SMPEG_getinfo(mpeg, info);
/* We're done! */
return(mpeg);
}
/* Get current information about an SMPEG object */
void SMPEG_getinfo( SMPEG* mpeg, SMPEG_Info* info )
{
if ( info ) {
MPEG_AudioInfo ainfo;
MPEG_VideoInfo vinfo;
memset(info, 0, (sizeof *info));
if ( mpeg->obj->mpeg ) {
info->has_audio = (mpeg->obj->mpeg->audiostream != NULL);
if ( info->has_audio ) {
mpeg->obj->GetAudioInfo(&ainfo);
}
info->has_video = (mpeg->obj->mpeg->videostream != NULL);
if ( info->has_video ) {
mpeg->obj->GetVideoInfo(&vinfo);
info->width = vinfo.width;
info->height = vinfo.height;
info->current_frame = vinfo.current_frame;
info->current_fps = vinfo.current_fps;
}
}
}
}
/* Enable or disable audio playback in MPEG stream */
void SMPEG_enableaudio( SMPEG* mpeg, int enable )
{
mpeg->obj->EnableAudio(enable);
}
/* Enable or disable video playback in MPEG stream */
void SMPEG_enablevideo( SMPEG* mpeg, int enable )
{
mpeg->obj->EnableVideo(enable);
}
/* Delete an SMPEG object */
void SMPEG_delete( SMPEG* mpeg )
{
delete mpeg->obj;
delete mpeg;
}
/* Get the current status of an SMPEG object */
SMPEGstatus SMPEG_status( SMPEG* mpeg )
{
SMPEGstatus status;
status = SMPEG_ERROR;
switch (mpeg->obj->Status()) {
case MPEG_STOPPED:
if ( ! mpeg->obj->WasError() ) {
status = SMPEG_STOPPED;
}
break;
case MPEG_PLAYING:
status = SMPEG_PLAYING;
break;
}
return(status);
}
/* Set the audio volume of an MPEG stream */
void SMPEG_setvolume( SMPEG* mpeg, int volume )
{
mpeg->obj->Volume(volume);
}
/* Set the destination surface for MPEG video playback */
void SMPEG_setdisplay( SMPEG* mpeg, SDL_Surface* dst, SDL_mutex* surfLock,
SMPEG_DisplayCallback callback)
{
mpeg->obj->SetDisplay(dst, surfLock, callback);
}
/* Set or clear looping play on an SMPEG object */
void SMPEG_loop( SMPEG* mpeg, int repeat )
{
mpeg->obj->Loop(repeat);
}
/* Set or clear pixel-doubled display on an SMPEG object */
void SMPEG_double( SMPEG* mpeg, int big )
{
mpeg->obj->DoubleDisplay(big);
}
/* Move the video display area within the destination surface */
void SMPEG_move( SMPEG* mpeg, int x, int y )
{
mpeg->obj->MoveDisplay(x, y);
}
/* Play an SMPEG object */
void SMPEG_play( SMPEG* mpeg )
{
mpeg->obj->Play();
}
/* Pause/Resume playback of an SMPEG object */
void SMPEG_pause( SMPEG* mpeg )
{
mpeg->obj->Pause();
}
/* Stop playback of an SMPEG object */
void SMPEG_stop( SMPEG* mpeg )
{
mpeg->obj->Stop();
}
/* Rewind the play position of an SMPEG object to the beginning of the MPEG */
void SMPEG_rewind( SMPEG* mpeg )
{
mpeg->obj->Rewind();
}
/* Render a particular frame in the MPEG video */
void SMPEG_renderFrame( SMPEG* mpeg,
int framenum, SDL_Surface* dst, int x, int y )
{
mpeg->obj->RenderFrame(framenum, dst, x, y);
}
/* Render the last frame of an MPEG video */
void SMPEG_renderFinal( SMPEG* mpeg, SDL_Surface* dst, int x, int y )
{
mpeg->obj->RenderFinal(dst, x, y);
}
/* Exported function for SDL audio playback */
void SMPEG_playAudio(void *udata, Uint8 *stream, int len)
{
MPEGaudio *audio = ((SMPEG *)udata)->obj->mpeg->GetAudio();
Play_MPEGaudio(audio, stream, len);
}
/* Get the best SDL audio spec for the audio stream */
int SMPEG_wantedSpec( SMPEG *mpeg, SDL_AudioSpec *wanted )
{
return (int)mpeg->obj->WantedSpec(wanted);
}
/* Inform SMPEG of the actual SDL audio spec used for sound playback */
void SMPEG_actualSpec( SMPEG *mpeg, SDL_AudioSpec *spec )
{
mpeg->obj->ActualSpec(spec);
}
/* Return NULL if there is no error in the MPEG stream, or an error message
if there was a fatal error in the MPEG stream for the SMPEG object.
*/
char *SMPEG_error( SMPEG* mpeg )
{
char *error;
error = NULL;
if ( mpeg->obj->WasError() ) {
error = mpeg->obj->TheError();
}
return(error);
}
/* Extern "C" */
};
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