int File::read(char* buffer, int max)
{
int i;
for(i = 0; i < max && !isEndOfFile(); i++)
readChar(buffer + i);
return i;
}
void FlcPlayer::decodeAudio(int frames)
{
int audioFramesFound = 0;
while (audioFramesFound < frames && !isEndOfFile(_audioFrameData))
{
if (!isValidFrame(_audioFrameData, _audioFrameSize, _audioFrameType))
{
_playingState = FINISHED;
break;
}
switch (_audioFrameType)
{
case FRAME_TYPE:
case PREFIX_CHUNK:
_audioFrameData += _audioFrameSize;
break;
case AUDIO_CHUNK:
Uint16 sampleRate;
readU16(sampleRate, _audioFrameData + 8);
_chunkData = _audioFrameData + 16;
playAudioFrame(sampleRate);
_audioFrameData += _audioFrameSize + 16;
++audioFramesFound;
break;
}
}
}
void FlcPlayer::decodeVideo(bool skipLastFrame)
{
bool videoFrameFound = false;
while (!videoFrameFound)
{
if (!isValidFrame(_videoFrameData, _videoFrameSize, _videoFrameType))
{
_playingState = FINISHED;
break;
}
switch (_videoFrameType)
{
case FRAME_TYPE:
Uint32 delay;
readU16(_frameChunks, _videoFrameData + 6);
readU16(_delayOverride, _videoFrameData + 8);
if (_headerType == FLI_TYPE)
{
delay = _delayOverride > 0 ? _delayOverride : _headerSpeed * (1000.0 / 70.0);
}
else
{
delay = _videoDelay;
}
waitForNextFrame(delay);
// Skip the frame header, we are not interested in the rest
_chunkData = _videoFrameData + 16;
_videoFrameData += _videoFrameSize;
// If this frame is the last one, don't play it
if(isEndOfFile(_videoFrameData))
_playingState = FINISHED;
if(!shouldQuit() || !skipLastFrame)
playVideoFrame();
videoFrameFound = true;
break;
case AUDIO_CHUNK:
_videoFrameData += _videoFrameSize + 16;
break;
case PREFIX_CHUNK:
// Just skip it
_videoFrameData += _videoFrameSize;
break;
}
}
}
void FlcPlayer::waitForNextFrame(Uint32 delay)
{
static Uint32 oldTick = 0;
int newTick;
int currentTick;
currentTick = SDL_GetTicks();
if (oldTick == 0)
{
oldTick = currentTick;
newTick = oldTick;
}
else
newTick = oldTick + delay;
if (_hasAudio)
{
while (currentTick < newTick)
{
while ((newTick - currentTick) > 10 && !isEndOfFile(_audioFrameData))
{
decodeAudio(1);
currentTick = SDL_GetTicks();
}
SDL_Delay(1);
currentTick = SDL_GetTicks();
}
}
else
{
while (currentTick < newTick)
{
SDL_Delay(1);
currentTick = SDL_GetTicks();
}
}
oldTick = SDL_GetTicks();
}
string Lexer::GetNextWord()
{
string stringBuffer = "";
bool readingDigitOrChar = false;
bool readingSymbols = false;
char ch = buffer[lexemeBegin];
if (ch == '\n') {
line++;
}
if (isDigitOrChar(ch)) {
readingDigitOrChar = true;
}
else {
readingSymbols = true;
}
while (ch != EOF) {
if (isEndOfFile(ch)) {
break;
}
if (isSpecialCharacter(ch) && (stringBuffer.length() == 0)) {
stringBuffer.push_back(ch);
break;
}
if (isEmptyCharacter(ch)) {
if (stringBuffer.length() != 0) {
break;
}
}
if (isDigitOrChar(ch) && readingDigitOrChar) {
stringBuffer.push_back(ch);
}
else if (!isDigitOrChar(ch) && readingSymbols) {
stringBuffer.push_back(ch);
}
else {
if (lexemeBegin > 0)
{
lexemeBegin--;
forward--;
}
char returnedChar = buffer[forward];
if (returnedChar == '\n') {
line--;
}
break;
}
lexemeBegin = forward;
forward++;
ch = buffer[lexemeBegin];
if (ch == '\n') {
line++;
}
}
return stringBuffer;
}