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MOVIE.C
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MOVIE.C
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/*
Adapted from Vince Diesi's source code found at "SAMPLE\SCEE\CD\MOVIE2" inside the developer's CD.
Several changes have been made for Dragon's Lair.
*/
/************************************************************
* *
* main.c *
* *
* *
* Vince Diesi 13/02/97 *
* *
* Copyright (C) 1997 Sony Computer Entertainment Inc. *
* All Rights Reserved *
* *
***********************************************************/
/* --------------------------------------------------------------------------
* - Description:
* - ------------
* - General purpose movie player.
* -
* - Refer to ReadMe.txt for more info.
* ---------------------------------------------------------------------------
*/
#include <sys/types.h>
#include <libsn.h>
#include <r3000.h>
#include <asm.h>
#include <kernel.h>
#include <libetc.h>
#include <libgte.h>
#include <libgpu.h>
#include <libcd.h>
#include <libspu.h>
#include <libpress.h>
#include <libsnd.h>
// Headers required for Dragon's Lair.
#define MOVIE_C
#include "files.h"
#include "movie.h"
#include "main.h"
#include "movies.h"
#include "game.h"
#include "assets.h"
/* ---------------------------------------------------------------------------
* - CONSTANTS
* ---------------------------------------------------------------------------
*/
// Define for timing and testing functions.
//#define TESTING
// Define for extra debug info.
//#define DEBUG
// Maximum number of retries.
#define MAX_RETRY 5
// Form1 sector size in bytes.
#define FORM1_SIZE 2048
// Ring buffer size in sectors.
#define RING_SIZE 64
// Maximum possible VLC buffer size (bytes) = 128K + (Header) = 129K.
#define MAX_VLCBUF_SIZE 132096
// Slice width in pixels.
#define SLICE_WIDTH 16
// Words/Pixel for 24-bit and 16-bit modes.
#define PPW24 3 / 2
#define PPW16 1
// DCT modes for 24-bit and 16-bit (STP = 1) streaming.
#define DCT_MODE24 3
#define DCT_MODE16 2
#define bound(val, n) ((((val) - 1) / (n) + 1) * (n))
#define bound16PPW(val, ppw) (bound((val), 16 * ppw))
#define bound16(val) (bound((val), 16))
// Speed of volume fade.
#define FADE_VOL_SPD 8
// RunLevel header size in bytes.
#define RL_HEADER_SIZE 1024
/* ---------------------------------------------------------------------------
* - DATA TYPE AND STRUCTURE DECLARATIONS
* ---------------------------------------------------------------------------
*/
// Moved to MOVIE.H
/* ---------------------------------------------------------------------------
* - GLOBAL DEFINITIONS
* ---------------------------------------------------------------------------
*/
#ifdef TESTING
static int t1, t2; // Timers.
static DRAWENV draw[2]; // DrawEnvs for FntPrint.
#endif
// Needed for printing text over movies.
#ifndef TESTING
static DRAWENV draw[2]; // DrawEnvs for FntPrint.
#endif
#if defined(TESTING)||defined(FIND_VLCBUF)
static short firstFrame = 1, // Frame skipping check.
numSkipped = 0,
prevFrameNum = 0;
#endif
#ifdef FIND_VLCBUF
static u_short maxRunLevel = 0;
#endif
u_long myheapbase = (u_long)REUSABLE_ADDRESS;
// Default heapbase address overwrites our assets.
//extern u_long __heapbase; // LibSN memory vars.
extern u_long __heapsize;
extern u_long _ramsize;
extern u_long _stacksize;
DecEnv dec; // Streaming Env.
static u_long oldHeapbase; // Heapbase before PlayStream.
static SndVolume oldVolume; // Old ADPCM volume.
// This keeps track of last double buffer index used by movie player to avoid blank frames when switching movies.
short LastDB = 0;
/* ---------------------------------------------------------------------------
* - PRIVATE FUNCTION PROTOTYPES
* ---------------------------------------------------------------------------
*/
static void StrDecDCToutCB(void);
static void StrInit(StrInfo *str, MOVIE_FILE *StrFile);
static void StrEnd(void);
//static void StrClearVRAM(void);
void StrClearVRAM(void);
static short StrKickCD(CdlLOC *loc);
static u_long *StrGetNextFrame(void);
static void StrVLCFrame(u_long *frame);
static void StrDrawDecodeSync(void);
//static short StrFadeOutVol(short *fadeVol);
static long GetDCToutSize(void);
static u_short ScalePPW(u_short n);
static u_short GetDCT_MODE(void);
#ifdef FIND_VLCBUF
static void PrintVLCBufSize(void);
#endif
static u_long AllocMem(u_long size);
/* ---------------------------------------------------------------------------
* - FUNCTION DEFINITIONS
* ---------------------------------------------------------------------------
*/
// Force pause. On real hardware one retry is not enough.
int PauseCD(void)
{
short PauseRetry = 0;
CdSync(0, NULL);
while ( !CdControlB(CdlPause, 0, 0) )
{
CdSync(0, NULL);
PauseRetry++;
if (PauseRetry > MAX_RETRY)
{
return 0; // Error trying to pause.
}
}
return 1; // Pause succesful.
}
// Callback function for StSetStream. Used as a workaround for playing until the very last frame.
void CheckLastFrame()
{
if ( ( STRCurrentFrame >= dec.endFrame-2 ) || ( STRPreviousFrame > STRCurrentFrame ) )
//if ( ( STRCurrentFrame >= dec.endFrame) || ( STRPreviousFrame > STRCurrentFrame ) )
{
// printf ("\nLast frame.");
// CdControlB(CdlPause, 0, 0);
if ( !PauseCD() )
{
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
}
StopPlayingMovie = 1;
}
}
short PlayStream(MOVIE_FILE *str, int StartingFrame) {
/* - Type: PUBLIC
* -
* - Param: str = (In) Stream info.
* - keyHandler = (In) Read controller function (Returns non-zero if exit).
* -
* - Ret: PLAYSTR_ERROR = Error.
* - PLAYSTR_END = End of stream exit.
* - PLAYSTR_USER = User exit.
* -
* - Usage: Play a stream.
*/
CdlFILE fp;
u_long *frame;
short frameRetry = 0;
short strQuit = 0;
// short fadeVol = 0;
// short TotalFrames = ( str->Frames+1 - StartingFrame ) + 1;
StopPlayingMovie = 0;
STRCurrentFrame = 0;
STRPreviousFrame = 0;
StrInit(&StrInfoBase, str);
// Skip to desired frame when a checkpoint has been reached. Play from first frame when StartingFrame = 0.
if ( !CdControl(CdlSetloc, (u_char *)( CdIntToPos(str->Position + ( StartingFrame * SECTORS_PER_FRAME ), &fp.pos) ), 0) )
{
StrEnd();
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
return PLAYSTR_ERROR;
}
//------------
if (!StrKickCD(&fp.pos)) {;
#ifdef DEBUG
printf("ERROR: MOVIE -- Couldn't start the CD!!\n");
#endif
StrEnd();
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
return PLAYSTR_ERROR;
}
while (!(frame = StrGetNextFrame())) { // If we can't get frame exit!
if (++frameRetry == MAX_RETRY) {
#ifdef DEBUG
printf("ERROR: MOVIE -- Couldn't get first frame!!\n");
#endif
StrEnd();
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
return PLAYSTR_ERROR;
}
}
frameRetry = 0;
StrVLCFrame(frame);
while (!StopPlayingMovie) {
// Play next frame if not in pause mode.
if ( !(Player1.Pause) )
{
DecDCTin(dec.vlcBuffer[dec.vlcId], GetDCT_MODE());
DecDCTout(dec.imageBuffer[dec.imageId], GetDCToutSize());
if (!(frame = StrGetNextFrame())) {
if (++frameRetry == MAX_RETRY)
{
strQuit = PLAYSTR_ERROR;
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
StopPlayingMovie = 1;
}
} else {
frameRetry = 0;
}
} // End if Player1.Pause
#ifdef TESTING
t2 = VSync(1); // Time VLC.
StrVLCFrame(frame);
t2 = VSync(1) - t2;
#else
if ( !(Player1.Pause) )
{
StrVLCFrame(frame);
}
#endif
// Dragon's Lair interactions during movie playback.
if ( Game_Status == STATUS_DEBUGMENU ) // For testing movies.
{
Interactions_DebugMenu();
}
else if ( Game_Status == STATUS_WATCHMOVIES ) // Hidden option for watching movies.
{
Interactions_WatchMovies();
}
else // Actual gameplay.
{
switch(str->Type)
{
case MOVIE_INTRO:
Interactions_Intro();
break;
case MOVIE_STAGE:
Interactions_Gameplay();
break;
case MOVIE_DEATH:
case MOVIE_DIRK:
case MOVIE_ALT_EXIT:
Interactions_Additional_Movie();
break;
default: // Error.
printf("\nError in %s, %s, %d", __FILE__, __FUNCTION__ , __LINE__);
PauseCD();
StopPlayingMovie = YES;
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
}
}
if ( !(Player1.Pause) )
{
StrDrawDecodeSync();
}
else if (!StopPlayingMovie)
{
dec.rectId ^= 1;
}
#ifdef TESTING
DrawSync(0);
FntPrint("\nVLC Time = %d\n", t2);
FntPrint("Total Time = %d\n", VSync(1) - t1); // Timing.
FntFlush(-1);
#endif
DrawSync(0);
VSync(0);
#ifdef TESTING
t1 = VSync(1); // Start timer.
#endif
PutDispEnv(&dec.disp[dec.rectId]);
PutDrawEnv(&draw[dec.rectId]); // Put DrawEnv for FntPrint.
// Pad input control for Dragon's Lair.
CheckButtons();
}
// Clear vram in 24bit mode.
if ( dec.is24Bit && ( str->Type == MOVIE_DEATH && Player1.Lives == 1 ) )
{
StrClearVRAM();
}
StrEnd();
if (dec.rewindSwitch) // Check for end of stream exit.
strQuit = PLAYSTR_END;
#ifdef DEBUG
if (strQuit == PLAYSTR_ERROR)
printf("ERROR: MOVIE -- Couldn't get frame from ring buffer!!\n");
#endif
#ifdef FIND_VLCBUF
// If stream played completely print the maximum VLC buffer size.
if (strQuit == PLAYSTR_END)
PrintVLCBufSize();
#endif
// Save last double buffer index for next movie.
LastDB = dec.rectId;
return strQuit;
}
/* ------------------------------------------------------------------------ */
static void StrDecDCToutCB(void) {
/* - Type: CALLBACK
* -
* - Usage: Receives decoded image data from the MDEC and loads it to VRAM.
*/
// In 24bit mode call StCdInterrupt() manually.
if (dec.is24Bit) {
extern StCdIntrFlag;
if(StCdIntrFlag) {
StCdInterrupt();
StCdIntrFlag = 0;
}
}
LoadImage(&dec.slice, dec.imageBuffer[dec.imageId]);
dec.imageId ^= 1;
dec.slice.x += dec.slice.w;
if (dec.slice.x < (dec.rect[dec.rectId].x + dec.rect[dec.rectId].w)) {
DecDCTout(dec.imageBuffer[dec.imageId], GetDCToutSize());
} else {
dec.frameDone = 1;
}
}
/* ------------------------------------------------------------------------ */
//static void StrInit(StrInfo *str, MOVIE_FILE *StrFile, int StartingFrame) {
static void StrInit(StrInfo *str, MOVIE_FILE *StrFile) {
/* - Type: PRIVATE
* -
* - Param: str = (In) = Stream Info.
* -
* - Usage: Init internal vars, the MDEC and allocate the buffers.
*/
short x, y, w, h;
short scrWidth;
u_long *ringBuf;
u_long vlcBufSize,
imageBufSize;
oldHeapbase = myheapbase;
x = str->x;
#ifdef NTSC
y = str->y;
#else
y = 8;
#endif
w = str->width;
h = str->height;
scrWidth = str->scrWidth;
#ifdef TESTING
// Init frame skipping checks.
firstFrame = 1;
numSkipped = 0;
prevFrameNum = 0;
// Init DrawEnvs for FntPrint.
SetDefDrawEnv(&draw[0], 0, 0, scrWidth, FRAME_Y);
SetDefDrawEnv(&draw[1], 0, FRAME_Y, scrWidth, FRAME_Y);
setRGB0(&draw[0], 0, 0, 0);
setRGB0(&draw[1], 0, 0, 0);
draw[0].isbg = draw[1].isbg = 1;
#endif
// Needed for printing text over movies.
#ifndef TESTING
// Init DrawEnvs for FntPrint.
SetDefDrawEnv(&draw[0], 0, 0, scrWidth, FRAME_Y);
SetDefDrawEnv(&draw[1], 0, FRAME_Y, scrWidth, FRAME_Y);
setRGB0(&draw[0], 0, 0, 0);
setRGB0(&draw[1], 0, 0, 0);
draw[0].isbg = draw[1].isbg = 1;
#endif
#ifdef FIND_VLCBUF
maxRunLevel = 0;
#endif
dec.is24Bit = str->mode;
dec.scrWidth = scrWidth;
dec.x = x;
dec.y = y;
dec.width = w;
dec.height = h;
// dec.endFrame = StrFile->Frames;
dec.endFrame = StrFile->Frames+1; // Workaround for displaying the last frame.
dec.volume = str->volume;
dec.frameCount = 0;
dec.rewindSwitch = 0;
dec.frameDone = 0;
// dec.rectId = 0;
// dec.vlcId = 0;
// dec.imageId = 0;
// Restore last double buffer used by previous movie.
dec.rectId = dec.vlcId = dec.imageId = LastDB;
// Init the display environments.
SetDefDispEnv(&dec.disp[0], 0, FRAME_Y, scrWidth, FRAME_Y);
SetDefDispEnv(&dec.disp[1], 0, 0, scrWidth, FRAME_Y);
// setRECT(&dec.disp[0].screen, SCREEN_X, SCREEN_Y, 0, FRAME_Y);
// setRECT(&dec.disp[1].screen, SCREEN_X, SCREEN_Y, 0, FRAME_Y);
// Use same values as in main double buffer.
setRECT(&dec.disp[0].screen, db[0].disp.screen.x, db[0].disp.screen.y, db[0].disp.screen.w, db[0].disp.screen.h);
setRECT(&dec.disp[1].screen, db[1].disp.screen.x, db[1].disp.screen.y, db[1].disp.screen.w, db[1].disp.screen.h);
dec.disp[0].isrgb24 = dec.disp[1].isrgb24 = (str->mode == STR_MODE24);
// if (str->drawBorders || dec.is24Bit) // Clear VRAM.
// StrClearVRAM();
// Clear vram in 24bit mode.
if ( dec.is24Bit && Game_Status == STATUS_DEBUGMENU )
{
StrClearVRAM();
Prev_Game_Status = Game_Status;
}
// Set correct display mode before we begin drawing.
VSync(0);
PutDispEnv(&dec.disp[dec.rectId]);
setRECT(&dec.rect[0], ScalePPW(x), y, ScalePPW(w), h);
setRECT(&dec.rect[1], ScalePPW(x), y + FRAME_Y, ScalePPW(w), h);
dec.slice = dec.rect[dec.rectId];
dec.slice.w = ScalePPW(SLICE_WIDTH);
// Alloc VLC and image buffers (amount allocated depends on frame size,
// streaming mode and maximum runlevel size).
#ifdef FIND_VLCBUF
vlcBufSize = MAX_VLCBUF_SIZE;
#else
if (str->vlcBufSize)
vlcBufSize = str->vlcBufSize;
else
vlcBufSize = MAX_VLCBUF_SIZE;
#endif // FIND_VLCBUF
dec.vlcBuffer[0] = (u_long *) AllocMem(vlcBufSize);
dec.vlcBuffer[1] = (u_long *) AllocMem(vlcBufSize);
if (dec.is24Bit)
imageBufSize = SLICE_WIDTH * 3 * h;
else
imageBufSize = SLICE_WIDTH * 2 * h;
dec.imageBuffer[0] = (u_long *) AllocMem(imageBufSize);
dec.imageBuffer[1] = (u_long *) AllocMem(imageBufSize);
// Init the MDEC.
DecDCTReset(0);
DecDCTvlcSize(0);
DecDCToutCallback((void (*)()) StrDecDCToutCB);
ringBuf = (u_long *) AllocMem(RING_SIZE * FORM1_SIZE);
StSetRing(ringBuf, RING_SIZE);
// No, if StartingFrame > 0 screen stays blank while the sound plays until desired frame is reached. StSetMask does the same.
// StSetStream(dec.is24Bit, StartingFrame, StrFile->Frames+1, 0, 0);
StSetStream(dec.is24Bit, 0, dec.endFrame, CheckLastFrame, 0);
// Store old ADPCM volume and set new volume.
SsGetSerialVol(SS_SERIAL_A, &oldVolume);
SsSetSerialVol(SS_SERIAL_A, dec.volume, dec.volume);
}
/* ------------------------------------------------------------------------ */
static void StrEnd(void) {
/* - Type: PRIVATE
* -
* - Usage: Clean up.
*/
StUnSetRing();
// CdControlB(CdlPause, 0, 0);
if ( !PauseCD() )
{
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(PLAY_ERROR, __FILE__, __FUNCTION__, __LINE__);
}
DecDCToutCallback(0);
myheapbase = oldHeapbase;
// if (dec.is24Bit) // Clear VRAM to remove any 24bit graphics.
// StrClearVRAM();
// Don't clear vram in 24bit mode between movies.
if ( dec.is24Bit && ( Game_Status != STATUS_GAMEPLAY && Game_Status != STATUS_DEATH && Game_Status != STATUS_DIRK ) )
StrClearVRAM();
// Restore previous ADPCM volume.
SsSetSerialVol(SS_SERIAL_A, oldVolume.left, oldVolume.right);
#ifdef DEBUG
printf("FrameCount %d\n", dec.frameCount);
#endif
}
/* ------------------------------------------------------------------------ */
//static void StrClearVRAM(void) {
void StrClearVRAM(void) {
/* - Type: PRIVATE
* -
* - Usage: Useful before and after streaming in 24bit mode to ensure
* - 24bit data is not displayed in 16bit mode (and vice versa).
*/
RECT clrRect;
setRECT(&clrRect, 0, 0, ScalePPW(dec.scrWidth), FRAME_Y);
ClearImage(&clrRect, 0, 0, 0);
clrRect.y = FRAME_Y;
ClearImage(&clrRect, 0, 0, 0);
}
/* ------------------------------------------------------------------------ */
static short StrKickCD(CdlLOC *loc) {
/* - Type: PRIVATE
* -
* - Param: loc = (In) location.
* -
* - Ret: 0 on error, 1 otherwise.
* -
* - Usage: Start the CD.
*/
short seekRetry = 0,
readRetry = 0;
do {
while (!CdControl(CdlSeekL, (u_char *)loc, 0)) {
if (++seekRetry == MAX_RETRY)
return 0;
}
seekRetry = 0;
if (readRetry++ == MAX_RETRY)
return 0;
} while (!CdRead2(CdlModeStream|CdlModeSpeed|CdlModeRT));
return 1;
}
/* ------------------------------------------------------------------------ */
static u_long *StrGetNextFrame(void) {
/* - Type: PRIVATE
* -
* - Ret: Address of next frame or NULL on error.
* -
* - Usage: Gets next frame from the ring buffer. Also checks for the
* - end of the stream. If the end has been reached rewindSwitch
* - is set. If frame is not obtained from the ring timeout and
* - return NULL.
*/
long timer = WAIT_TIME;
u_long *addr;
StHEADER *sector;
// Get the next frame from the ring buffer.
while (StGetNext(&addr, (u_long**) §or)) {
// Last frame gets stuck here.
if (--timer == 0)
return NULL;
}
dec.frameCount++; // Update internal frame count.
#if defined(TESTING)||defined(FIND_VLCBUF)
// Check for frame skipping.
if (firstFrame) {
prevFrameNum = sector->frameCount;
firstFrame = 0;
} else if ((sector->frameCount - prevFrameNum) != 1) {
numSkipped++;
}
prevFrameNum = sector->frameCount;
FntPrint("Skipped = %d\n", numSkipped);
#endif
#ifdef DEBUG
if (dec.frameCount == 1)
printf("MOVIE: w = %d, h = %d, sectors = %d\n",
sector->width, sector->height, sector->nSectors);
FntPrint("Frame No. = %d\n", dec.frameCount);
#endif
// Keep track of actual frame number.
STRPreviousFrame = STRCurrentFrame;
STRCurrentFrame = sector->frameCount;
//printf("\nsector->frameCount: %d. dec.frameCount: %d", sector->frameCount, dec.frameCount);
// End of stream checks.
if (sector->frameCount > dec.endFrame) {
#ifdef DEBUG
printf("ERROR: MOVIE -- Found sector frame count over > end frame (%d > %d)\n",
sector->frameCount, dec.endFrame);
#endif
dec.rewindSwitch = 1;
StopPlayingMovie = 1;
return addr;
}
if (sector->frameCount < dec.frameCount) {
#ifdef DEBUG
printf("ERROR: MOVIE -- Found sector frame count < internal frame count. (%d < %d)\n",
sector->frameCount, dec.endFrame);
#endif
dec.rewindSwitch = 1;
StopPlayingMovie = 1;
return addr;
}
if (sector->width != dec.width || sector->height != dec.height) {
#ifdef DEBUG
printf("ERROR: MOVIE -- Found bad sized frame (%d x %d) is not (%d x %d).\n",
sector->width, sector->height, dec.width, dec.height);
#endif
dec.rewindSwitch = 1;
StopPlayingMovie = 1;
Prev_Game_Status = Game_Status;
Game_Status = STATUS_ERRORSCREEN;
SaveError(DECODE_ERROR, __FILE__, __FUNCTION__, __LINE__);
return addr;
}
return addr;
}
/* ------------------------------------------------------------------------ */
static void StrVLCFrame(u_long *frame) {
/* - Type: PRIVATE
* -
* - Param: frame = (In) Address of frame BS.
* -
* - Usage: VLC decodes the frame's BS. Unlock frame from the ring buffer
* - once decoded.
*/
// If no frame to decode return.
if (frame == NULL) {
#ifdef DEBUG
printf("ERROR: MOVIE -- No frame to VLC decode!!\n");
#endif
return;
}
#ifdef TESTING
// Print BS Encoded Format (i.e. Version 2 or 3).
FntPrint("BS Ver = %d\n", *((u_short *) frame + 3) );
#endif
#ifdef FIND_VLCBUF
if (DecDCTBufSize(frame) > maxRunLevel)
maxRunLevel = DecDCTBufSize(frame);
#endif
dec.vlcId ^= 1;
DecDCTvlc(frame, dec.vlcBuffer[dec.vlcId]);
StFreeRing(frame);
}
/* ------------------------------------------------------------------------ */
static void StrDrawDecodeSync(void) {
/* - Type: PRIVATE
* -
* - Usage: Wait for current frame's decoding and drawing to be finished.
*/
long timer = WAIT_TIME;
while (!dec.frameDone) {
if (--timer == 0) {
#ifdef DEBUG
printf("ERROR: MOVIE -- MDEC decode timeout!!\n");
#endif
break;
}
}
dec.frameDone = 0;
dec.rectId ^= 1;
dec.slice.x = dec.rect[dec.rectId].x;
dec.slice.y = dec.rect[dec.rectId].y;
}
/* ------------------------------------------------------------------------ */
//static short StrFadeOutVol(short *fadeVol) {
/* - Type: PRIVATE
* -
* - Param: fadeVol = (In/Out) Current volume.
* -
* - Ret: 1 = Volume completely faded (therefore finish playing the stream).
* - 0 = Otherwise.
* -
* -
* - Usage: Fade out the volume.
*/
/*
if ((*fadeVol -= FADE_VOL_SPD) < 0)
*fadeVol = 0;
SsSetSerialVol(SS_SERIAL_A, *fadeVol, *fadeVol);
if (!*fadeVol)
return PLAYSTR_USER; // Flag user exit.
else
return 0;
}
*/
/* ------------------------------------------------------------------------ */
static long GetDCToutSize(void) {
/* - Type: PRIVATE
* -
* - Ret: DecDCTout size in longs for current playback mode.
*/
u_short h = dec.height;
if (dec.is24Bit)
return (((SLICE_WIDTH * PPW24) * bound16(h)) >> 1);
else
return (((SLICE_WIDTH * PPW16) * bound16(h)) >> 1);
}
/* ------------------------------------------------------------------------ */
static u_short ScalePPW(u_short n) {
/* - Type: PRIVATE
* -
* - Param: n = (In) A number.
* -
* - Ret: n scaled by the correct PPW (words/pixel). This depends
* - on the current playback mode.
*/
if (dec.is24Bit)
return (n * PPW24);
else
return (n * PPW16);
}
/* ------------------------------------------------------------------------ */
static u_short GetDCT_MODE(void) {