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https://github.com/libretro/scummvm.git
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363 lines
10 KiB
C++
363 lines
10 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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// Based on eos' Bink decoder which is in turn
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// based quite heavily on the Bink decoder found in FFmpeg.
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// Many thanks to Kostya Shishkov for doing the hard work.
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#include "common/scummsys.h"
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#ifdef USE_BINK
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#ifndef VIDEO_BINK_DECODER_H
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#define VIDEO_BINK_DECODER_H
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#include "common/array.h"
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#include "common/rational.h"
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#include "video/video_decoder.h"
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#include "graphics/surface.h"
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namespace Audio {
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class AudioStream;
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class QueuingAudioStream;
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}
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namespace Common {
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class SeekableReadStream;
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class BitStream;
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class Huffman;
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class RDFT;
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class DCT;
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}
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namespace Graphics {
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struct Surface;
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}
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namespace Video {
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/**
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* Decoder for Bink videos.
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*
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* Video decoder used in engines:
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* - scumm (he)
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*/
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class BinkDecoder : public VideoDecoder {
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public:
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BinkDecoder();
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~BinkDecoder();
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bool loadStream(Common::SeekableReadStream *stream);
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void close();
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protected:
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void readNextPacket();
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bool supportsAudioTrackSwitching() const { return true; }
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AudioTrack *getAudioTrack(int index);
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private:
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static const int kAudioChannelsMax = 2;
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static const int kAudioBlockSizeMax = (kAudioChannelsMax << 11);
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enum AudioCodec {
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kAudioCodecDCT,
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kAudioCodecRDFT
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};
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/** An audio track. */
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struct AudioInfo {
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uint16 flags;
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uint32 sampleRate;
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uint8 channels;
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uint32 outSampleRate;
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uint8 outChannels;
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AudioCodec codec;
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uint32 sampleCount;
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Common::BitStream *bits;
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bool first;
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uint32 frameLen;
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uint32 overlapLen;
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uint32 blockSize;
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uint32 bandCount;
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uint32 *bands;
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float root;
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float coeffs[16 * kAudioBlockSizeMax];
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int16 prevCoeffs[kAudioBlockSizeMax];
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float *coeffsPtr[kAudioChannelsMax];
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Common::RDFT *rdft;
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Common::DCT *dct;
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AudioInfo();
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~AudioInfo();
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};
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/** A video frame. */
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struct VideoFrame {
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bool keyFrame;
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uint32 offset;
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uint32 size;
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Common::BitStream *bits;
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VideoFrame();
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~VideoFrame();
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};
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class BinkVideoTrack : public FixedRateVideoTrack {
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public:
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BinkVideoTrack(uint32 width, uint32 height, const Graphics::PixelFormat &format, uint32 frameCount, const Common::Rational &frameRate, bool swapPlanes, bool hasAlpha, uint32 id);
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~BinkVideoTrack();
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uint16 getWidth() const { return _surface.w; }
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uint16 getHeight() const { return _surface.h; }
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Graphics::PixelFormat getPixelFormat() const { return _surface.format; }
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int getCurFrame() const { return _curFrame; }
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int getFrameCount() const { return _frameCount; }
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const Graphics::Surface *decodeNextFrame() { return &_surface; }
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/** Decode a video packet. */
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void decodePacket(VideoFrame &frame);
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protected:
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Common::Rational getFrameRate() const { return _frameRate; }
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private:
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/** A decoder state. */
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struct DecodeContext {
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VideoFrame *video;
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uint32 planeIdx;
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uint32 blockX;
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uint32 blockY;
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byte *dest;
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byte *prev;
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byte *destStart, *destEnd;
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byte *prevStart, *prevEnd;
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uint32 pitch;
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int coordMap[64];
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int coordScaledMap1[64];
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int coordScaledMap2[64];
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int coordScaledMap3[64];
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int coordScaledMap4[64];
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};
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/** IDs for different data types used in Bink video codec. */
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enum Source {
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kSourceBlockTypes = 0, ///< 8x8 block types.
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kSourceSubBlockTypes , ///< 16x16 block types (a subset of 8x8 block types).
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kSourceColors , ///< Pixel values used for different block types.
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kSourcePattern , ///< 8-bit values for 2-color pattern fill.
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kSourceXOff , ///< X components of motion value.
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kSourceYOff , ///< Y components of motion value.
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kSourceIntraDC , ///< DC values for intrablocks with DCT.
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kSourceInterDC , ///< DC values for interblocks with DCT.
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kSourceRun , ///< Run lengths for special fill block.
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kSourceMAX
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};
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/** Bink video block types. */
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enum BlockType {
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kBlockSkip = 0, ///< Skipped block.
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kBlockScaled , ///< Block has size 16x16.
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kBlockMotion , ///< Block is copied from previous frame with some offset.
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kBlockRun , ///< Block is composed from runs of colors with custom scan order.
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kBlockResidue , ///< Motion block with some difference added.
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kBlockIntra , ///< Intra DCT block.
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kBlockFill , ///< Block is filled with single color.
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kBlockInter , ///< Motion block with DCT applied to the difference.
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kBlockPattern , ///< Block is filled with two colors following custom pattern.
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kBlockRaw ///< Uncoded 8x8 block.
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};
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/** Data structure for decoding and tranlating Huffman'd data. */
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struct Huffman {
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int index; ///< Index of the Huffman codebook to use.
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byte symbols[16]; ///< Huffman symbol => Bink symbol tranlation list.
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};
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/** Data structure used for decoding a single Bink data type. */
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struct Bundle {
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int countLengths[2]; ///< Lengths of number of entries to decode (in bits).
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int countLength; ///< Length of number of entries to decode (in bits) for the current plane.
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Huffman huffman; ///< Huffman codebook.
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byte *data; ///< Buffer for decoded symbols.
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byte *dataEnd; ///< Buffer end.
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byte *curDec; ///< Pointer to the data that wasn't yet decoded.
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byte *curPtr; ///< Pointer to the data that wasn't yet read.
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};
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int _curFrame;
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int _frameCount;
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Graphics::Surface _surface;
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int _surfaceWidth; ///< The actual surface width
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int _surfaceHeight; ///< The actual surface height
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uint32 _id; ///< The BIK FourCC.
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bool _hasAlpha; ///< Do video frames have alpha?
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bool _swapPlanes; ///< Are the planes ordered (A)YVU instead of (A)YUV?
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Common::Rational _frameRate;
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Bundle _bundles[kSourceMAX]; ///< Bundles for decoding all data types.
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Common::Huffman *_huffman[16]; ///< The 16 Huffman codebooks used in Bink decoding.
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/** Huffman codebooks to use for decoding high nibbles in color data types. */
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Huffman _colHighHuffman[16];
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/** Value of the last decoded high nibble in color data types. */
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int _colLastVal;
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byte *_curPlanes[4]; ///< The 4 color planes, YUVA, current frame.
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byte *_oldPlanes[4]; ///< The 4 color planes, YUVA, last frame.
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/** Initialize the bundles. */
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void initBundles();
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/** Deinitialize the bundles. */
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void deinitBundles();
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/** Initialize the Huffman decoders. */
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void initHuffman();
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/** Decode a plane. */
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void decodePlane(VideoFrame &video, int planeIdx, bool isChroma);
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/** Read/Initialize a bundle for decoding a plane. */
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void readBundle(VideoFrame &video, Source source);
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/** Read the symbols for a Huffman code. */
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void readHuffman(VideoFrame &video, Huffman &huffman);
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/** Merge two Huffman symbol lists. */
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void mergeHuffmanSymbols(VideoFrame &video, byte *dst, const byte *src, int size);
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/** Read and translate a symbol out of a Huffman code. */
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byte getHuffmanSymbol(VideoFrame &video, Huffman &huffman);
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/** Get a direct value out of a bundle. */
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int32 getBundleValue(Source source);
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/** Read a count value out of a bundle. */
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uint32 readBundleCount(VideoFrame &video, Bundle &bundle);
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// Handle the block types
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void blockSkip (DecodeContext &ctx);
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void blockScaledSkip (DecodeContext &ctx);
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void blockScaledRun (DecodeContext &ctx);
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void blockScaledIntra (DecodeContext &ctx);
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void blockScaledFill (DecodeContext &ctx);
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void blockScaledPattern(DecodeContext &ctx);
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void blockScaledRaw (DecodeContext &ctx);
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void blockScaled (DecodeContext &ctx);
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void blockMotion (DecodeContext &ctx);
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void blockRun (DecodeContext &ctx);
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void blockResidue (DecodeContext &ctx);
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void blockIntra (DecodeContext &ctx);
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void blockFill (DecodeContext &ctx);
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void blockInter (DecodeContext &ctx);
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void blockPattern (DecodeContext &ctx);
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void blockRaw (DecodeContext &ctx);
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// Read the bundles
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void readRuns (VideoFrame &video, Bundle &bundle);
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void readMotionValues(VideoFrame &video, Bundle &bundle);
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void readBlockTypes (VideoFrame &video, Bundle &bundle);
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void readPatterns (VideoFrame &video, Bundle &bundle);
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void readColors (VideoFrame &video, Bundle &bundle);
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void readDCS (VideoFrame &video, Bundle &bundle, int startBits, bool hasSign);
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void readDCTCoeffs (VideoFrame &video, int16 *block, bool isIntra);
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void readResidue (VideoFrame &video, int16 *block, int masksCount);
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// Bink video IDCT
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void IDCT(int16 *block);
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void IDCTPut(DecodeContext &ctx, int16 *block);
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void IDCTAdd(DecodeContext &ctx, int16 *block);
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};
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class BinkAudioTrack : public AudioTrack {
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public:
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BinkAudioTrack(AudioInfo &audio);
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~BinkAudioTrack();
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/** Decode an audio packet. */
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void decodePacket();
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protected:
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Audio::AudioStream *getAudioStream() const;
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private:
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AudioInfo *_audioInfo;
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Audio::QueuingAudioStream *_audioStream;
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float getFloat();
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/** Decode an audio block. */
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void audioBlock(int16 *out);
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/** Decode a DCT'd audio block. */
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void audioBlockDCT();
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/** Decode a RDFT'd audio block. */
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void audioBlockRDFT();
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void readAudioCoeffs(float *coeffs);
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static void floatToInt16Interleave(int16 *dst, const float **src, uint32 length, uint8 channels);
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};
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Common::SeekableReadStream *_bink;
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Common::Array<AudioInfo> _audioTracks; ///< All audio tracks.
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Common::Array<VideoFrame> _frames; ///< All video frames.
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void initAudioTrack(AudioInfo &audio);
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};
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} // End of namespace Video
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#endif // VIDEO_BINK_DECODER_H
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#endif // USE_BINK
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