APEG_STREAM* get_theora_size(const char *fileName, int *width, int *height)
{
APEG_STREAM* oggVid = apeg_open_stream(fileName);
if (oggVid != NULL)
{
apeg_get_video_size(oggVid, width, height);
}
else
{
*width = 0;
*height = 0;
}
return oggVid;
}
static int decode_stream(APEG_LAYER *layer, BITMAP *target)
{
int ret;
int dw, dh;
if((ret = setjmp(jmp_buffer)) != 0)
return ret;
apeg_get_video_size(&layer->stream, &dw, &dh);
layer->stream.frame = 0;
if((layer->stream.flags & APEG_HAS_VIDEO))
{
layer->stream.timer = -1;
while(layer->stream.timer == -1)
;
}
// loop through the pictures in the sequence
do {
layer->stream.frame_updated = -1;
layer->stream.audio.flushed = FALSE;
ret = APEG_OK;
if((layer->stream.flags & APEG_HAS_AUDIO) && layer->multiple > 0.0)
{
ret = _apeg_audio_poll(layer);
if((layer->stream.flags & APEG_HAS_VIDEO))
{
int t = _apeg_audio_get_position(layer);
if(t >= 0)
layer->stream.timer = (double)t*layer->stream.frame_rate/
(double)layer->stream.audio.freq -
layer->stream.frame;
}
}
if((layer->stream.flags & APEG_HAS_VIDEO))
{
if(!layer->picture)
{
if((layer->stream.flags&APEG_MPG_VIDEO))
{
// Get the next MPEG header
if(apeg_get_header(layer) == 1)
{
// Decode the next picture
if(layer->picture_type != B_TYPE ||
!framedrop || layer->stream.timer <= 1)
layer->picture = apeg_get_frame(layer);
}
// If end of stream, display the last frame
else if((!framedrop || layer->stream.timer <= 1) &&
!layer->got_last)
{
layer->got_last = TRUE;
layer->picture = layer->backward_frame;
}
}
else
layer->picture = altheora_get_frame(layer);
if(pack_feof(layer->pf) &&
(!(layer->stream.flags&APEG_HAS_AUDIO)||
layer->multiple==0.0 || ret!=APEG_OK))
ret = APEG_EOF;
}
if(layer->stream.timer > 0)
{
// Update frame and timer count
++(layer->stream.frame);
--(layer->stream.timer);
// If we're not behind, update the display frame
layer->stream.frame_updated = 0;
if(layer->picture && (!framedrop || layer->stream.timer == 0))
{
apeg_display_frame(layer, layer->picture);
}
layer->picture = NULL;
}
if(layer->stream.frame_updated == 1 || layer->picture)
ret = APEG_OK;
}
if(ret == APEG_OK)
{
if((!(layer->stream.flags & APEG_HAS_VIDEO) ||
layer->stream.frame_updated >= 0) && (ret = callback_proc(layer->stream.bitmap)))
break;
if(layer->stream.frame_updated < 0 && !layer->stream.audio.flushed)
rest(1);
}
} while(ret == APEG_OK);
return ret;
}