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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/scummsys.h"
#include "common/stream.h"
#include "common/textconsole.h"
#include "audio/audiostream.h"
#include "audio/decoders/raw.h"
#include "access/access.h"
#include "access/video/movie_decoder.h"
// for Test-Code
#include "common/system.h"
#include "common/events.h"
#include "common/keyboard.h"
#include "engines/engine.h"
#include "engines/util.h"
#include "graphics/palette.h"
#include "graphics/pixelformat.h"
#include "graphics/surface.h"
namespace Access {
AccessVIDMovieDecoder::AccessVIDMovieDecoder()
: _stream(0), _videoTrack(0), _audioTrack(0) {
_streamSeekOffset = 0;
_streamVideoIndex = 0;
_streamAudioIndex = 0;
}
AccessVIDMovieDecoder::~AccessVIDMovieDecoder() {
close();
}
bool AccessVIDMovieDecoder::loadStream(Common::SeekableReadStream *stream) {
uint32 videoCodecTag = 0;
uint32 videoHeight = 0;
uint32 videoWidth = 0;
uint16 regularDelay = 0;
uint32 audioSampleRate = 0;
close();
_stream = stream;
_streamSeekOffset = 15; // offset of first chunk
_streamVideoIndex = 0;
_streamAudioIndex = 0;
// read header
// ID [dword] "VID"
// ?? [byte]
// ?? [word]
// width [word]
// height [word]
// regular delay between frames (60 per second) [word]
// ?? [word]
videoCodecTag = _stream->readUint32BE();
if (videoCodecTag != MKTAG('V','I','D',0x00)) {
warning("AccessVIDMoviePlay: bad codec tag, not a video file?");
close();
return false;
}
_stream->skip(3);
videoWidth = _stream->readUint16LE();
videoHeight = _stream->readUint16LE();
regularDelay = _stream->readUint16LE();
_stream->skip(2);
if (!regularDelay) {
warning("AccessVIDMoviePlay: delay between frames is zero?");
close();
return false;
}
// create video track
_videoTrack = new StreamVideoTrack(videoWidth, videoHeight, regularDelay);
addTrack(_videoTrack);
//warning("width %d, height %d", videoWidth, videoHeight);
// Look through the first few packets
static const int maxPacketCheckCount = 10;
for (int i = 0; i < maxPacketCheckCount; i++) {
byte chunkId = _stream->readByte();
// Bail out if done
if (_stream->eos())
break;
// Bail also in case end of file chunk was found
if (chunkId == kVIDMovieChunkId_EndOfFile)
break;
uint32 chunkStartOffset = _stream->pos();
//warning("data chunk at %x", chunkStartOffset);
switch (chunkId) {
case kVIDMovieChunkId_FullFrame:
case kVIDMovieChunkId_FullFrameCompressed:
case kVIDMovieChunkId_PartialFrameCompressed:
case kVIDMovieChunkId_FullFrameCompressedFill: {
if (!_videoTrack->skipOverFrame(_stream, chunkId)) {
close();
return false;
}
break;
}
case kVIDMovieChunkId_Palette: {
if (!_videoTrack->skipOverPalette(_stream)) {
close();
return false;
}
break;
}
case kVIDMovieChunkId_AudioFirstChunk:
case kVIDMovieChunkId_Audio: {
// sync [word]
// sampling rate [byte]
// size of audio data [word]
// sample data [] (mono, 8-bit, unsigned)
//
// Only first chunk has sync + sampling rate
if (chunkId == kVIDMovieChunkId_AudioFirstChunk) {
byte soundblasterRate;
_stream->skip(2); // skip over sync
soundblasterRate = _stream->readByte();
audioSampleRate = 1000000 / (256 - soundblasterRate);
_audioTrack = new StreamAudioTrack(audioSampleRate, getSoundType());
addTrack(_audioTrack);
_stream->seek(chunkStartOffset); // seek back
}
if (!_audioTrack) {
warning("AccessVIDMoviePlay: regular audio chunk, before audio chunk w/ header");
close();
return false;
}
if (!_audioTrack->skipOverAudio(_stream, chunkId)) {
close();
return false;
}
break;
}
default:
warning("AccessVIDMoviePlay: Unknown chunk-id '%x' inside VID movie", chunkId);
close();
return false;
}
// Remember this chunk inside our cache
IndexCacheEntry indexCacheEntry;
indexCacheEntry.chunkId = chunkId;
indexCacheEntry.offset = chunkStartOffset;
_indexCacheTable.push_back(indexCacheEntry);
// Got an audio chunk now? -> exit b/c we are done
if (audioSampleRate)
break;
}
// Remember offset of latest not-indexed-yet chunk
_streamSeekOffset = _stream->pos();
// If sample rate was found, create an audio track
if (audioSampleRate) {
_audioTrack = new StreamAudioTrack(audioSampleRate, getSoundType());
addTrack(_audioTrack);
}
// Rewind back to the beginning right to the first chunk
_stream->seek(15);
return true;
}
void AccessVIDMovieDecoder::close() {
Video::VideoDecoder::close();
delete _stream; _stream = 0;
_videoTrack = 0;
_indexCacheTable.clear();
}
// We try to at least decode 1 frame
// and also try to get at least 0.5 seconds of audio queued up
void AccessVIDMovieDecoder::readNextPacket() {
uint32 currentMovieTime = getTime();
uint32 wantedAudioQueued = currentMovieTime + 500; // always try to be 0.500 seconds in front of movie time
uint32 streamIndex = 0;
IndexCacheEntry indexEntry;
bool currentlySeeking = false;
bool videoDone = false;
bool audioDone = false;
// Seek to smallest stream offset
if ((_streamVideoIndex <= _streamAudioIndex) || (!_audioTrack)) {
streamIndex = _streamVideoIndex;
} else {
streamIndex = _streamAudioIndex;
}
if (_audioTrack) {
if (wantedAudioQueued <= _audioTrack->getTotalAudioQueued()) {
// already got enough audio queued up
audioDone = true;
}
} else {
// no audio track, audio is always done
audioDone = true;
}
while (1) {
// Check, if stream-index is already cached
if (streamIndex < _indexCacheTable.size()) {
indexEntry.chunkId = _indexCacheTable[streamIndex].chunkId;
indexEntry.offset = _indexCacheTable[streamIndex].offset;
currentlySeeking = false;
} else {
// read from file
_stream->seek(_streamSeekOffset);
indexEntry.chunkId = _stream->readByte();
indexEntry.offset = _stream->pos();
currentlySeeking = true;
// and store that as well
_indexCacheTable.push_back(indexEntry);
}
// end of stream -> exit
if (_stream->eos())
break;
// end of file chunk -> exit
if (indexEntry.chunkId == kVIDMovieChunkId_EndOfFile)
break;
// warning("chunk %x", indexEntry.chunkId);
switch (indexEntry.chunkId) {
case kVIDMovieChunkId_FullFrame:
case kVIDMovieChunkId_FullFrameCompressed:
case kVIDMovieChunkId_PartialFrameCompressed:
case kVIDMovieChunkId_FullFrameCompressedFill: {
if ((_streamVideoIndex <= streamIndex) && (!videoDone)) {
// We are at an index, that is still relevant for video decoding
// and we are not done with video yet
if (!currentlySeeking) {
// seek to stream position in case we used the cache
_stream->seek(indexEntry.offset);
}
//warning("video decode chunk %x at %lx", indexEntry.chunkId, _stream->pos());
_videoTrack->decodeFrame(_stream, indexEntry.chunkId);
videoDone = true;
_streamVideoIndex = streamIndex + 1;
} else {
if (currentlySeeking) {
// currently seeking, so we have to skip the frame bytes manually
_videoTrack->skipOverFrame(_stream, indexEntry.chunkId);
}
}
break;
}
case kVIDMovieChunkId_Palette: {
if ((_streamVideoIndex <= streamIndex) && (!videoDone)) {
// We are at an index, that is still relevant for video decoding
// and we are not done with video yet
if (!currentlySeeking) {
// seek to stream position in case we used the cache
_stream->seek(indexEntry.offset);
}
_videoTrack->decodePalette(_stream);
_streamVideoIndex = streamIndex + 1;
} else {
if (currentlySeeking) {
// currently seeking, so we have to skip the frame bytes manually
_videoTrack->skipOverPalette(_stream);
}
}
break;
}
case kVIDMovieChunkId_AudioFirstChunk:
case kVIDMovieChunkId_Audio: {
if ((_streamAudioIndex <= streamIndex) && (!audioDone)) {
// We are at an index that is still relevant for audio decoding
if (!currentlySeeking) {
// seek to stream position in case we used the cache
_stream->seek(indexEntry.offset);
}
_audioTrack->queueAudio(_stream, indexEntry.chunkId);
_streamAudioIndex = streamIndex + 1;
if (wantedAudioQueued <= _audioTrack->getTotalAudioQueued()) {
// Got enough audio
audioDone = true;
}
} else {
if (!_audioTrack) {
error("AccessVIDMoviePlay: audio chunks found without audio track active");
}
if (currentlySeeking) {
// currently seeking, so we have to skip the audio bytes manually
_audioTrack->skipOverAudio(_stream, indexEntry.chunkId);
}
}
break;
}
default:
error("AccessVIDMoviePlay: Unknown chunk-id '%x' inside VID movie", indexEntry.chunkId);
}
if (currentlySeeking) {
// remember currently stream offset in case we are seeking
_streamSeekOffset = _stream->pos();
}
// go to next index
streamIndex++;
if ((videoDone) && (audioDone)) {
return;
}
}
if (!videoDone) {
// no more video frames? set end of video track
_videoTrack->setEndOfTrack();
}
}
AccessVIDMovieDecoder::StreamVideoTrack::StreamVideoTrack(uint32 width, uint32 height, uint16 regularFrameDelay) {
_width = width;
_height = height;
_regularFrameDelay = regularFrameDelay;
_curFrame = -1;
_nextFrameStartTime = 0;
_endOfTrack = false;
_dirtyPalette = false;
memset(&_palette, 0, sizeof(_palette));
_surface = new Graphics::Surface();
_surface->create(_width, _height, Graphics::PixelFormat::createFormatCLUT8());
}
AccessVIDMovieDecoder::StreamVideoTrack::~StreamVideoTrack() {
delete _surface;
}
bool AccessVIDMovieDecoder::StreamVideoTrack::endOfTrack() const {
return _endOfTrack;
}
Graphics::PixelFormat AccessVIDMovieDecoder::StreamVideoTrack::getPixelFormat() const {
return _surface->format;
}
void AccessVIDMovieDecoder::StreamVideoTrack::decodeFrame(Common::SeekableReadStream *stream, byte chunkId) {
byte *framePixelsPtr = (byte *)_surface->getPixels();
byte *pixelsPtr = framePixelsPtr;
byte rleByte = 0;
uint16 additionalDelay = 0;
int32 expectedPixels = 0;
switch (chunkId) {
case kVIDMovieChunkId_FullFrame: {
// Full frame is:
// data [width * height]
additionalDelay = stream->readUint16LE();
stream->read(framePixelsPtr, _width * _height);
break;
}
case kVIDMovieChunkId_FullFrameCompressed:
case kVIDMovieChunkId_PartialFrameCompressed: {
// Skip manually over compressed data
// Full frame compressed is:
// additional delay [word]
// REPEAT:
// RLE [byte]
// RLE upper bit set: skip over RLE & 0x7F pixels
// RLE upper bit not set: draw RLE amount of pixels (those pixels follow right after RLE byte)
//
// Partial frame compressed is:
// sync [word]
// horizontal start position [word]
// REPEAT:
// see full frame compressed
uint16 horizontalStartPosition = 0;
additionalDelay = stream->readUint16LE();
if (chunkId == kVIDMovieChunkId_PartialFrameCompressed) {
horizontalStartPosition = stream->readUint16LE();
if (horizontalStartPosition >= _height) {
error("AccessVIDMoviePlay: starting position larger than height during partial frame compressed, data corrupt?");
return;
}
}
expectedPixels = _width * (_height - horizontalStartPosition);
// adjust frame destination pointer
pixelsPtr += (horizontalStartPosition * _width);
while (expectedPixels >= 0) {
rleByte = stream->readByte();
if (!rleByte) // NUL means end of stream
break;
if (rleByte & 0x80) {
rleByte = rleByte & 0x7F;
expectedPixels -= rleByte;
} else {
// skip over pixels
expectedPixels -= rleByte;
stream->read(pixelsPtr, rleByte); // read pixel data into frame
}
pixelsPtr += rleByte;
}
// expectedPixels may be positive here in case stream got terminated with a NUL
if (expectedPixels < 0) {
error("AccessVIDMoviePlay: pixel count mismatch during full/partial frame compressed, data corrupt?");
}
break;
}
case kVIDMovieChunkId_FullFrameCompressedFill: {
// Full frame compressed fill is:
// additional delay [word]
// REPEAT:
// RLE [byte]
// RLE upper bit set: draw RLE amount (& 0x7F) of pixels with specified color (color byte follows after RLE byte)
// RLE upper bit not set: draw RLE amount of pixels (those pixels follow right after RLE byte)
additionalDelay = stream->readUint16LE();
expectedPixels = _width * _height;
while (expectedPixels > 0) {
rleByte = stream->readByte();
if (rleByte & 0x80) {
rleByte = rleByte & 0x7F;
expectedPixels -= rleByte;
byte fillColor = stream->readByte();
memset(pixelsPtr, fillColor, rleByte);
} else {
// skip over pixels
expectedPixels -= rleByte;
stream->read(pixelsPtr, rleByte); // read pixel data into frame
}
pixelsPtr += rleByte;
}
if (expectedPixels < 0) {
error("AccessVIDMoviePlay: pixel count mismatch during full frame compressed fill, data corrupt?");
}
break;
}
default:
assert(0);
break;
}
_curFrame++;
// TODO: not sure, if additionalDelay is supposed to affect the follow-up frame or the current frame
// the videos, that I found, don't have it set
uint32 currentFrameStartTime = getNextFrameStartTime();
uint32 nextFrameStartTime = (_regularFrameDelay * _curFrame) * 1000 / 60;
if (additionalDelay) {
nextFrameStartTime += additionalDelay * 1000 / 60;
}
assert(currentFrameStartTime <= nextFrameStartTime);
setNextFrameStartTime(nextFrameStartTime);
}
bool AccessVIDMovieDecoder::StreamVideoTrack::skipOverFrame(Common::SeekableReadStream *stream, byte chunkId) {
byte rleByte = 0;
int32 expectedPixels = 0;
switch (chunkId) {
case kVIDMovieChunkId_FullFrame: {
// Full frame is:
// additional delay [word]
// data [width * height]
stream->skip(2);
stream->skip(_width * _height);
break;
}
case kVIDMovieChunkId_FullFrameCompressed:
case kVIDMovieChunkId_PartialFrameCompressed: {
// Skip manually over compressed data
// Full frame compressed is:
// additional delay [word]
// REPEAT:
// RLE [byte]
// RLE upper bit set: skip over RLE & 0x7F pixels
// RLE upper bit not set: draw RLE amount of pixels (those pixels follow right after RLE byte)
//
// Partial frame compressed is:
// sync [word]
// horizontal start position [word]
// REPEAT:
// see full frame compressed
uint16 horizontalStartPosition = 0;
stream->skip(2);
if (chunkId == kVIDMovieChunkId_PartialFrameCompressed) {
horizontalStartPosition = stream->readUint16LE();
if (horizontalStartPosition >= _height) {
warning("AccessVIDMoviePlay: starting position larger than height during partial frame compressed, data corrupt?");
return false;
}
}
expectedPixels = _width * (_height - horizontalStartPosition);
while (expectedPixels >= 0) {
rleByte = stream->readByte();
if (!rleByte) // NUL means end of stream
break;
if (rleByte & 0x80) {
expectedPixels -= rleByte & 0x7F;
} else {
// skip over pixels
expectedPixels -= rleByte;
stream->skip(rleByte); // skip over pixel data
}
}
// expectedPixels may be positive here in case stream got terminated with a NUL
if (expectedPixels < 0) {
warning("AccessVIDMoviePlay: pixel count mismatch during full/partial frame compressed, data corrupt?");
return false;
}
break;
}
case kVIDMovieChunkId_FullFrameCompressedFill: {
// Full frame compressed fill is:
// additional delay [word]
// REPEAT:
// RLE [byte]
// RLE upper bit set: draw RLE amount (& 0x7F) of pixels with specified color (color byte follows after RLE byte)
// RLE upper bit not set: draw RLE amount of pixels (those pixels follow right after RLE byte)
stream->skip(2);
expectedPixels = _width * _height;
while (expectedPixels > 0) {
rleByte = stream->readByte();
if (rleByte & 0x80) {
expectedPixels -= rleByte & 0x7F;
stream->skip(1);
} else {
// skip over pixels
expectedPixels -= rleByte;
stream->skip(rleByte); // skip over pixel data
}
}
if (expectedPixels < 0) {
warning("AccessVIDMoviePlay: pixel count mismatch during full frame compressed fill, data corrupt?");
return false;
}
break;
}
default:
assert(0);
break;
}
return true;
}
bool AccessVIDMovieDecoder::StreamVideoTrack::skipOverPalette(Common::SeekableReadStream *stream) {
stream->skip(0x300); // 3 bytes per color, 256 colors
return true;
}
void AccessVIDMovieDecoder::StreamVideoTrack::decodePalette(Common::SeekableReadStream *stream) {
byte red, green, blue;
assert(stream);
// VID files use a 6-bit palette and not a 8-bit one, we change it to 8-bit
for (uint16 curColor = 0; curColor < 256; curColor++) {
red = stream->readByte() & 0x3F;
green = stream->readByte() & 0x3F;
blue = stream->readByte() & 0x3F;
_palette[curColor * 3] = (red << 2) | (red >> 4);
_palette[curColor * 3 + 1] = (green << 2) | (green >> 4);
_palette[curColor * 3 + 2] = (blue << 2) | (blue >> 4);
}
_dirtyPalette = true;
}
const byte *AccessVIDMovieDecoder::StreamVideoTrack::getPalette() const {
_dirtyPalette = false;
return _palette;
}
bool AccessVIDMovieDecoder::StreamVideoTrack::hasDirtyPalette() const {
return _dirtyPalette;
}
AccessVIDMovieDecoder::StreamAudioTrack::StreamAudioTrack(uint32 sampleRate, Audio::Mixer::SoundType soundType) :
AudioTrack(soundType) {
_totalAudioQueued = 0; // currently 0 milliseconds queued
_sampleRate = sampleRate;
_stereo = false; // always mono
_audioStream = Audio::makeQueuingAudioStream(sampleRate, _stereo);
}
AccessVIDMovieDecoder::StreamAudioTrack::~StreamAudioTrack() {
delete _audioStream;
}
void AccessVIDMovieDecoder::StreamAudioTrack::queueAudio(Common::SeekableReadStream *stream, byte chunkId) {
Common::SeekableReadStream *rawAudioStream = 0;
Audio::RewindableAudioStream *audioStream = 0;
uint32 audioLengthMSecs = 0;
if (chunkId == kVIDMovieChunkId_AudioFirstChunk) {
stream->skip(3); // skip over additional delay + sample rate
}
uint32 audioSize = stream->readUint16LE();
// Read the specified chunk into memory
rawAudioStream = stream->readStream(audioSize);
audioLengthMSecs = audioSize * 1000 / _sampleRate; // 1 byte == 1 8-bit sample
audioStream = Audio::makeRawStream(rawAudioStream, _sampleRate, Audio::FLAG_UNSIGNED | Audio::FLAG_LITTLE_ENDIAN, DisposeAfterUse::YES);
if (audioStream) {
_totalAudioQueued += audioLengthMSecs;
_audioStream->queueAudioStream(audioStream, DisposeAfterUse::YES);
} else {
// in case there was an error
delete rawAudioStream;
}
}
bool AccessVIDMovieDecoder::StreamAudioTrack::skipOverAudio(Common::SeekableReadStream *stream, byte chunkId) {
if (chunkId == kVIDMovieChunkId_AudioFirstChunk) {
stream->skip(3); // skip over additional delay + sample rate
}
uint32 audioSize = stream->readUint16LE();
stream->skip(audioSize);
return true;
}
Audio::AudioStream *AccessVIDMovieDecoder::StreamAudioTrack::getAudioStream() const {
return _audioStream;
}
bool AccessEngine::playMovie(const Common::String &filename, const Common::Point &pos) {
AccessVIDMovieDecoder *videoDecoder = new AccessVIDMovieDecoder();
Common::Point framePos(pos.x, pos.y);
if (!videoDecoder->loadFile(filename)) {
warning("AccessVIDMoviePlay: could not open '%s'", filename.c_str());
return false;
}
bool skipVideo = false;
_events->clearEvents();
videoDecoder->start();
while (!shouldQuit() && !videoDecoder->endOfVideo() && !skipVideo) {
if (videoDecoder->needsUpdate()) {
const Graphics::Surface *frame = videoDecoder->decodeNextFrame();
if (frame) {
_screen->blitFrom(*frame);
if (videoDecoder->hasDirtyPalette()) {
const byte *palette = videoDecoder->getPalette();
g_system->getPaletteManager()->setPalette(palette, 0, 256);
}
_screen->update();
}
}
_events->pollEventsAndWait();
Common::KeyState keyState;
if (_events->getKey(keyState)) {
if (keyState.keycode == Common::KEYCODE_ESCAPE)
skipVideo = true;
}
}
videoDecoder->close();
delete videoDecoder;
return !skipVideo;
}
} // End of namespace Access
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