void draw_init_env()
{
framebuffer_t frame;
zbuffer_t z;
packet_t *packet = packet_init(16,PACKET_NORMAL);
qword_t *q = packet->data;
frame.width = 640;
frame.height = 448;
frame.psm = GS_PSM_32;
frame.mask = 0;
frame.address = graph_vram_allocate(frame.width,frame.height,frame.psm,GRAPH_ALIGN_PAGE);
z.enable = 0;
z.method = ZTEST_METHOD_GREATER;
z.address = 0;
z.mask = 1;
z.zsm = 0;
graph_initialize(frame.address,640,448,GS_PSM_32,0,0);
q = draw_setup_environment(q,0,&frame,&z);
q = draw_finish(q);
dma_channel_send_normal(DMA_CHANNEL_GIF,packet->data, q - packet->data, 0,0);
dma_wait_fast();
packet_free(packet);
}
int main ( void ) {
/* read file (or part of it ) into memory */
PACKET *lPck = malloc(sizeof(PACKET));
QWORD *q;
FRAMEBUFFER frame;
ZBUFFER z;
InitCBParam lInfo;
int lFD = fioOpen ( MPEG_BITSTREAM_FILE, O_RDONLY );
long lSize;
long lPTS, lCurPTS;
frame.width = 640;
frame.height = 512;
frame.mask = 0;
frame.psm = GS_PSM_32;
frame.address = graph_vram_allocate(frame.width,frame.height, frame.psm, GRAPH_ALIGN_PAGE);
z.enable = 0;
z.mask = 0;
z.method = 0;
z.zsm = 0;
z.address = 0;
packet_allocate(lPck, 100, 0, 0);
if ( lFD < 0 ) {
printf ( "test_mpeg: could not open '%s'\n", MPEG_BITSTREAM_FILE );
goto end;
} /* end if */
lSize = fioLseek ( lFD, 0, SEEK_END );
fioLseek ( lFD, 0, SEEK_SET );
if ( lSize <= 0 ) {
printf ( "test_mpeg: could not obtain file size (%ld)\n", lSize );
goto end;
} /* end if */
s_pMPEGData = ( unsigned char* )malloc ( lSize = lSize > MAX_SIZE ? MAX_SIZE : lSize );
if ( !s_pMPEGData ) {
printf ( "test_mpeg: could not allocate enough memory (%ld)\n", lSize );
goto end;
} /* end if */
if ( fioRead (
lFD, s_pTransferPtr = s_pMPEGData, s_MPEGDataSize = lSize
) != lSize
) {
printf ( "test_mpeg: could not read file\n" );
goto end;
} /* end if */
fioClose ( lFD );
/* initialize DMAC (I have no idea what this code does as */
/* I'm not quite familiar with ps2sdk) */
dma_channel_initialize ( DMA_CHANNEL_toIPU, NULL, 0 );
dma_channel_initialize ( DMA_CHANNEL_GIF, NULL, 0 );
dma_channel_fast_waits( DMA_CHANNEL_GIF );
/* initialize graphics synthesizer */
graph_initialize(0,640,512,GS_PSM_32,0,0);
/* setup texture buffer address just after the framebuffer */
lInfo.m_TexAddr = graph_vram_allocate(0,0,GS_PSM_32,GRAPH_ALIGN_BLOCK);
q = lPck->data;
q = draw_setup_environment(q,0,&frame,&z);
/* clear screen */
q = draw_clear(q,0,0,0,640.0f,512.0f,0,0,0);
dma_channel_send_normal(DMA_CHANNEL_GIF, lPck->data, q - lPck->data, 0, 0);
/* now it's time to initialize MPEG decoder (though it can be */
/* initialized any time). Just make sure that DMA transfers */
/* to and from IPU (and DRAM -> SPR) are not active, otherwise */
/* unpredicted things will happen. Initialization code is also */
/* allocating some memory using 'memalign' function and no */
/* check is performed whether the allocation was successful or */
/* not, so, before calling this make sure that at least WxHx4x3 */
/* bytes are avaliable for dynamic allocation (possibly using */
/* ps2_sbrk ( 0 ) call) where W and H are picture dimensions in */
/* units of pixels. */
MPEG_Initialize ( SetDMA, NULL, InitCB, &lInfo, &lCurPTS );
/* during decoding scratchpad RAM from address 0x0000 to 0x3C00 */
/* is used by the decoder. */
/* let's go */
while ( 1 ) {
/* try decode picture into "lInfo.m_pData" area. It's allowed */
/* to supply different area each time, just make sure that */
/* there're no conflicts with data cache, as decoder doesn't do */
/* anything to synchronize/flush/invalidate data cache. */
/* RGB -> YUV colorspace conversion is pefromed automatically */
/* using interrupt hahdler/semaphore, so, multithreaded */
/* application can benefit from it. Usage of IPU and DMA channels */
/* to/from IPU and DRAM -> SPR is strictly forbidden during */
/* decoding :). */
if ( !MPEG_Picture ( lInfo.m_pData, &lPTS ) ) {
/* MPEG_Picture returns nonzero if the picture was successfully */
/* decoded. Zero return means one of the following: */
/* - end of stream was detected (SetDMA function returned zero) */
/* - MPEG sequence end code (0x000001B7) was detected */
/* this test just finishes in both cases */
if ( lInfo.m_pInfo -> m_fEOF ) break;
/* ...instead of 'break' we can continue to the next sequence...*/
/* ...but I'm too lazy to handle second call of 'InitCB' :D */
else break;
} /* end if */
/* now transfer decoded picture data into texture area of GS RAM */
dma_wait_fast();
dma_channel_send_chain( DMA_CHANNEL_GIF, lInfo.m_XFerPck.data, lInfo.m_XFerPck.qwc, 0, 0);
/* wait for vsync 2 times (we have interlaced frame mode) */
graph_wait_vsync ();
graph_wait_vsync ();
/* no need to wait for DMA transfer completion since vsyncs above */
/* have enough lattency... */
/* ...and finally draw decoded picture... */
dma_channel_send_normal( DMA_CHANNEL_GIF, lInfo.m_DrawPck.data, lInfo.m_DrawPck.qwc, 0, 0);
/* ...and go back for the next one */
} /* end while */
/* free memory and other resources */
MPEG_Destroy ();
end:
printf ( "test_mpeg: test finished\n" );
return SleepThread (), 0;
} /* end main */