diff options
Diffstat (limited to 'video/codecs/svq1.cpp')
| -rw-r--r-- | video/codecs/svq1.cpp | 927 |
1 files changed, 337 insertions, 590 deletions
diff --git a/video/codecs/svq1.cpp b/video/codecs/svq1.cpp index 38abbc7230..0ccdc22fc9 100644 --- a/video/codecs/svq1.cpp +++ b/video/codecs/svq1.cpp @@ -33,6 +33,7 @@ #include "common/system.h" #include "common/debug.h" #include "common/textconsole.h" +#include "common/huffman.h" #include "graphics/yuv_to_rgb.h" @@ -43,69 +44,338 @@ namespace Video { #define SVQ1_BLOCK_INTER_4V 2 #define SVQ1_BLOCK_INTRA 3 -struct VLC { - int32 bits; - int16 (*table)[2]; // code, bits - int32 table_size; - int32 table_allocated; -}; - -/** - * parses a vlc code, faster then get_vlc() - * @param bits is the number of bits which will be read at once, must be - * identical to nb_bits in init_vlc() - * @param max_depth is the number of times bits bits must be read to completely - * read the longest vlc code - * = (max_vlc_length + bits - 1) / bits - */ -static int getVlc2(Common::BitStream *s, int16 (*table)[2], int bits, int maxDepth) { - int index = s->getBits(bits); - int code = table[index][0]; - int n = table[index][1]; - - if (maxDepth > 1 && n < 0) { - index = s->getBits(-n) + code; - code = table[index][0]; - n = table[index][1]; - - if(maxDepth > 2 && n < 0) { - index = s->getBits(-n) + code; - code = table[index][0]; - n = table[index][1]; - } +SVQ1Decoder::SVQ1Decoder(uint16 width, uint16 height) { + _surface = new Graphics::Surface(); + _surface->create(width, height, g_system->getScreenFormat()); + + _current[0] = new byte[width*height]; + _current[1] = new byte[(width/4)*(height/4)]; + _current[2] = new byte[(width/4)*(height/4)]; + + _last[0] = 0; + _last[1] = 0; + _last[2] = 0; + + // Setup Variable Length Code Tables + _blockType = new Common::Huffman(0, 4, s_svq1BlockTypeCodes, s_svq1BlockTypeLengths); + + for (int i = 0; i < 6; i++) { + _intraMultistage[i] = new Common::Huffman(0, 8, s_svq1IntraMultistageCodes[i], s_svq1IntraMultistageLengths[i]); + _interMultistage[i] = new Common::Huffman(0, 8, s_svq1InterMultistageCodes[i], s_svq1InterMultistageLengths[i]); } - return code; + _intraMean = new Common::Huffman(0, 256, s_svq1IntraMeanCodes, s_svq1IntraMeanLengths); + _interMean = new Common::Huffman(0, 512, s_svq1InterMeanCodes, s_svq1InterMeanLengths); + _motionComponent = new Common::Huffman(0, 33, s_svq1MotionComponentCodes, s_svq1MotionComponentLengths); } -static int allocTable(VLC *vlc, int size, int use_static) { - int index; - int16 (*temp)[2] = NULL; - index = vlc->table_size; - vlc->table_size += size; - if (vlc->table_size > vlc->table_allocated) { - if(use_static) - error("SVQ1 cant do anything, init_vlc() is used with too little memory"); - vlc->table_allocated += (1 << vlc->bits); - temp = (int16 (*)[2])realloc(vlc->table, sizeof(int16 *) * 2 * vlc->table_allocated); - if (!temp) { - free(vlc->table); - vlc->table = NULL; - return -1; - } - vlc->table = temp; +SVQ1Decoder::~SVQ1Decoder() { + _surface->free(); + delete _surface; + + delete[] _current[0]; + delete[] _current[1]; + delete[] _current[2]; + + delete[] _last[0]; + delete[] _last[1]; + delete[] _last[2]; + + delete _blockType; + delete _intraMean; + delete _interMean; + delete _motionComponent; + + for (int i = 0; i < 6; i++) { + delete _intraMultistage[i]; + delete _interMultistage[i]; } - return index; } -static VLC svq1_block_type; -static VLC svq1_motion_component; -static VLC svq1_intra_multistage[6]; -static VLC svq1_inter_multistage[6]; -static VLC svq1_intra_mean; -static VLC svq1_inter_mean; +const Graphics::Surface *SVQ1Decoder::decodeImage(Common::SeekableReadStream *stream) { + debug(1, "SVQ1Decoder::decodeImage()"); + + Common::BitStream32BEMSB frameData(*stream); + + uint32 frameCode = frameData.getBits(22); + debug(1, " frameCode: %d", frameCode); + + if ((frameCode & ~0x70) || !(frameCode & 0x60)) { // Invalid + warning("Invalid Image at frameCode"); + return _surface; + } + + // swap some header bytes (why?) + //if (frameCode != 0x20) { + // uint32 *src = stream; + // + // for (i = 4; i < 8; i++) { + // src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i]; + // } + //} + +#if 0 + static const uint16 checksum_table[256] = { + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, + 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, + 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, + 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, + 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, + 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, + 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, + 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, + 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, + 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, + 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, + 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, + 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, + 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, + 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, + 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, + 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, + 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, + 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, + 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, + 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, + 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, + 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, + 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, + 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, + 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, + 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, + 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, + 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, + 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, + 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, + 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 + }; +#endif + + byte temporalReference = frameData.getBits(8); + debug(1, " temporalReference: %d", temporalReference); + const char* types[4] = { "I (Key)", "P (Delta from Previous)", "B (Delta from Next)", "Invalid" }; + byte frameType = frameData.getBits(2); + debug(1, " frameType: %d = %s Frame", frameType, types[frameType]); + if (frameType == 0) { // I Frame + // TODO: Validate checksum if present + if (frameCode == 0x50 || frameCode == 0x60) { + uint32 checksum = frameData.getBits(16); + debug(1, " checksum:0x%02x", checksum); + //uint16 calculate_packet_checksum (const uint8 *data, const int length) { + // int value; + //for (int i = 0; i < length; i++) + // value = checksum_table[data[i] ^ (value >> 8)] ^ ((value & 0xFF) << 8); + } + } else if (frameType == 2) { // B Frame + warning("B Frames not supported by SVQ1 decoder"); + return _surface; + } else if (frameType == 3) { // Invalid + warning("Invalid Frame Type"); + return _surface; + } + + static const uint8 stringXORTable[256] = { + 0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54, + 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D, + 0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06, + 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F, + 0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0, + 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9, + 0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2, + 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B, + 0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9, + 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0, + 0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B, + 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2, + 0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D, + 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44, + 0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F, + 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16, + 0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB, + 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92, + 0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9, + 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0, + 0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F, + 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36, + 0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D, + 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64, + 0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26, + 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F, + 0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74, + 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D, + 0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82, + 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB, + 0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0, + 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9 + }; + + if ((frameCode ^ 0x10) >= 0x50) { + // Decode embedded string + Common::String str; + uint8 stringLen = frameData.getBits(8); + byte xorVal = stringXORTable[stringLen]; + + for (uint16 i = 0; i < stringLen-1; i++) { + byte data = frameData.getBits(8); + str += data ^ xorVal; + xorVal = stringXORTable[data]; + } + debug(1, " Embedded String of %d Characters: \"%s\"", stringLen, str.c_str()); + } + + byte unk1 = frameData.getBits(2); // Unknown + debug(1, " unk1: %d", unk1); + byte unk2 = frameData.getBits(2); // Unknown + debug(1, " unk2: %d", unk2); + bool unk3 = frameData.getBit(); // Unknown + debug(1, " unk3: %d", unk3); + + static const struct { uint w, h; } standardFrameSizes[7] = { + { 160, 120 }, // 0 + { 128, 96 }, // 1 + { 176, 144 }, // 2 + { 352, 288 }, // 3 + { 704, 576 }, // 4 + { 240, 180 }, // 5 + { 320, 240 } // 6 + }; + + byte frameSizeCode = frameData.getBits(3); + debug(1, " frameSizeCode: %d", frameSizeCode); + uint16 frameWidth, frameHeight; + if (frameSizeCode == 7) { + frameWidth = frameData.getBits(12); + frameHeight = frameData.getBits(12); + } else { + frameWidth = standardFrameSizes[frameSizeCode].w; + frameHeight = standardFrameSizes[frameSizeCode].h; + } + debug(1, " frameWidth: %d", frameWidth); + debug(1, " frameHeight: %d", frameHeight); + if (frameWidth == 0 || frameHeight == 0) { // Invalid + warning("Invalid Frame Size"); + return _surface; + } + bool checksumPresent = frameData.getBit(); + debug(1, " checksumPresent: %d", checksumPresent); + if (checksumPresent) { + bool usePacketChecksum = frameData.getBit(); + debug(1, " usePacketChecksum: %d", usePacketChecksum); + bool componentChecksumsAfterImageData = frameData.getBit(); + debug(1, " componentChecksumsAfterImageData: %d", componentChecksumsAfterImageData); + byte unk4 = frameData.getBits(2); + debug(1, " unk4: %d", unk4); + if (unk4 != 0) + warning("Invalid Frame Header in SVQ1 Frame Decode"); + } -static int svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) { + bool unk5 = frameData.getBit(); + debug(1, " unk5: %d", unk5); + if (unk5) { + bool unk6 = frameData.getBit(); + debug(1, " unk6: %d", unk6); + byte unk7 = frameData.getBits(4); + debug(1, " unk7: %d", unk7); + bool unk8 = frameData.getBit(); + debug(1, " unk8: %d", unk8); + byte unk9 = frameData.getBits(2); + debug(1, " unk9: %d", unk9); + while (frameData.getBit()) { + byte unk10 = frameData.getBits(8); + debug(1, " unk10: %d", unk10); + } + } + + if (frameWidth == _surface->w && frameHeight == _surface->h) { + // Decode Y, U and V component planes + for (int i = 0; i < 3; i++) { + int linesize, width, height; + if (i == 0) { + // Y Size is width * height + width = frameWidth; + if (width % 16) { + width /= 16; + width++; + width *= 16; + } + assert(width % 16 == 0); + height = frameHeight; + if (height % 16) { + height /= 16; + height++; + height *= 16; + } + assert(height % 16 == 0); + linesize = width; + } else { + // U and V size is width/4 * height/4 + width = frameWidth/4; + if (width % 16) { + width /= 16; + width++; + width *= 16; + } + assert(width % 16 == 0); + height = frameHeight/4; + if (height % 16) { + height /= 16; + height++; + height *= 16; + } + assert(height % 16 == 0); + linesize = width; + } + + if (frameType == 0) { // I Frame + // Keyframe (I) + byte *current = _current[i]; + for (uint16 y = 0; y < height; y += 16) { + for (uint16 x = 0; x < width; x += 16) { + if (int result = svq1DecodeBlockIntra(&frameData, ¤t[x], linesize) != 0) { + warning("Error in svq1DecodeBlock %i (keyframe)", result); + return _surface; + } + } + current += 16 * linesize; + } + } else { + // Delta frame (P or B) + + // Prediction Motion Vector + Common::Point *pmv = new Common::Point[(width/8) + 3]; + + byte *previous; + if(frameType == 2) { // B Frame + warning("B Frame not supported currently"); + //previous = _next[i]; + } else + previous = _last[i]; + + byte *current = _current[i]; + for (uint16 y = 0; y < height; y += 16) { + for (uint16 x = 0; x < width; x += 16) { + if (int result = svq1DecodeDeltaBlock(&frameData, ¤t[x], previous, linesize, pmv, x, y) != 0) { + warning("Error in svq1DecodeDeltaBlock %i", result); + return _surface; + } + } + + pmv[0].x = pmv[0].y = 0; + + current += 16*linesize; + } + delete[] pmv; + } + } + + convertYUV410ToRGB(_surface, _current[0], _current[1], _current[2], frameWidth, frameHeight, frameWidth, frameWidth/2); + } else + warning("FrameWidth/Height Sanity Check Failed!"); + + return _surface; +} + +int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) { uint8 *list[63]; uint32 *dst; int entries[6]; @@ -141,7 +411,7 @@ static int svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) height = 1 << ((3 + level) /2); // get number of stages (-1 skips vector, 0 for mean only) - stages = getVlc2(s, svq1_intra_multistage[level].table, 3, 3) - 1; + stages = _intraMultistage[level]->getSymbol(*s) - 1; if (stages == -1) { for (y=0; y < height; y++) { @@ -155,7 +425,7 @@ static int svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) return -1; // invalid vector } - mean = getVlc2(s, svq1_intra_mean.table, 8, 3); + mean = _intraMean->getSymbol(*s); if (stages == 0) { for (y=0; y < height; y++) { @@ -211,7 +481,7 @@ static int svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) return 0; } -static int svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitch) { +int SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitch) { uint8 *list[63]; uint32 *dst; int entries[6]; @@ -247,7 +517,7 @@ static int svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitc height = 1 << ((3 + level) /2); // get number of stages (-1 skips vector, 0 for mean only) - stages = getVlc2(s, svq1_inter_multistage[level].table, 3, 2) - 1; + stages = _interMultistage[level]->getSymbol(*s) - 1; if (stages == -1) continue; // skip vector @@ -256,7 +526,7 @@ static int svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitc return -1; // invalid vector } - mean = getVlc2(s, svq1_inter_mean.table, 9, 3) - 256; + mean = _interMean->getSymbol(*s) - 256; // SVQ1_CALC_CODEBOOK_ENTRIES(svq1_inter_codebooks); const uint32 *codebook = (const uint32 *) svq1_inter_codebooks[level]; @@ -323,10 +593,10 @@ static inline int mid_pred(int a, int b, int c) { return b; } -static int svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, Common::Point **pmv) { +int SVQ1Decoder::svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, Common::Point **pmv) { for (int i=0; i < 2; i++) { // get motion code - int diff = getVlc2(s, svq1_motion_component.table, 7, 2); + int diff = _motionComponent->getSymbol(*s); if (diff < 0) return -1; else if (diff) { @@ -343,7 +613,7 @@ static int svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, Commo return 0; } -static void svq1SkipBlock(uint8 *current, uint8 *previous, int pitch, int x, int y) { +void SVQ1Decoder::svq1SkipBlock(uint8 *current, uint8 *previous, int pitch, int x, int y) { uint8 *src; uint8 *dst; @@ -357,7 +627,7 @@ static void svq1SkipBlock(uint8 *current, uint8 *previous, int pitch, int x, int } } -static int svq1MotionInterBlock(Common::BitStream *ss, +int SVQ1Decoder::svq1MotionInterBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch, Common::Point *motion, int x, int y) { uint8 *src; @@ -409,7 +679,7 @@ static int svq1MotionInterBlock(Common::BitStream *ss, return 0; } -static int svq1MotionInter4vBlock(Common::BitStream *ss, +int SVQ1Decoder::svq1MotionInter4vBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch, Common::Point *motion, int x, int y) { uint8 *src; @@ -497,14 +767,14 @@ static int svq1MotionInter4vBlock(Common::BitStream *ss, return 0; } -static int svq1DecodeDeltaBlock(Common::BitStream *ss, +int SVQ1Decoder::svq1DecodeDeltaBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch, Common::Point *motion, int x, int y) { uint32 block_type; int result = 0; // get block type - block_type = getVlc2(ss, svq1_block_type.table, 2, 2); + block_type = _blockType->getSymbol(*ss); // reset motion vectors if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) { @@ -547,527 +817,4 @@ static int svq1DecodeDeltaBlock(Common::BitStream *ss, return result; } -#define GET_DATA(v, table, i, wrap, size)\ -{\ - const uint8 *ptr = (const uint8 *)table + i * wrap;\ - switch(size) {\ - case 1:\ - v = *(const uint8 *)ptr;\ - break;\ - case 2:\ - v = *(const uint16 *)ptr;\ - break;\ - default:\ - v = *(const uint32 *)ptr;\ - break;\ - }\ -} - -static int build_table(VLC *vlc, int table_nb_bits, - int nb_codes, - const void *bits, int bits_wrap, int bits_size, - const void *codes, int codes_wrap, int codes_size, - const void *symbols, int symbols_wrap, int symbols_size, - int code_prefix, int n_prefix, int flags) -{ - int i, j, k, n, table_size, table_index, nb, n1, index, code_prefix2, symbol; - uint32 code; - int16 (*table)[2]; - - table_size = 1 << table_nb_bits; - table_index = allocTable(vlc, table_size, flags & 4); - if (table_index < 0) - return -1; - table = &vlc->table[table_index]; - - for(i = 0; i < table_size; i++) { - table[i][1] = 0; //bits - table[i][0] = -1; //codes - } - - // first pass: map codes and compute auxillary table sizes - for(i = 0; i < nb_codes; i++) { - GET_DATA(n, bits, i, bits_wrap, bits_size); - GET_DATA(code, codes, i, codes_wrap, codes_size); - // we accept tables with holes - if (n <= 0) - continue; - if (!symbols) - symbol = i; - else - GET_DATA(symbol, symbols, i, symbols_wrap, symbols_size); - // if code matches the prefix, it is in the table - n -= n_prefix; - if(flags & 2) - code_prefix2= code & (n_prefix>=32 ? 0xffffffff : (1 << n_prefix)-1); - else - code_prefix2= code >> n; - if (n > 0 && code_prefix2 == code_prefix) { - if (n <= table_nb_bits) { - // no need to add another table - j = (code << (table_nb_bits - n)) & (table_size - 1); - nb = 1 << (table_nb_bits - n); - for(k = 0; k < nb; k++) { - if(flags & 2) - j = (code >> n_prefix) + (k<<n); - if (table[j][1] /*bits*/ != 0) { - error("SVQ1 incorrect codes"); - return -1; - } - table[j][1] = n; //bits - table[j][0] = symbol; - j++; - } - } else { - n -= table_nb_bits; - j = (code >> ((flags & 2) ? n_prefix : n)) & ((1 << table_nb_bits) - 1); - // compute table size - n1 = -table[j][1]; //bits - if (n > n1) - n1 = n; - table[j][1] = -n1; //bits - } - } - } - - // second pass : fill auxillary tables recursively - for(i = 0;i < table_size; i++) { - n = table[i][1]; //bits - if (n < 0) { - n = -n; - if (n > table_nb_bits) { - n = table_nb_bits; - table[i][1] = -n; //bits - } - index = build_table(vlc, n, nb_codes, - bits, bits_wrap, bits_size, - codes, codes_wrap, codes_size, - symbols, symbols_wrap, symbols_size, - (flags & 2) ? (code_prefix | (i << n_prefix)) : ((code_prefix << table_nb_bits) | i), - n_prefix + table_nb_bits, flags); - if (index < 0) - return -1; - // note: realloc has been done, so reload tables - table = &vlc->table[table_index]; - table[i][0] = index; //code - } - } - return table_index; -} - -/* Build VLC decoding tables suitable for use with get_vlc(). - - 'nb_bits' set thee decoding table size (2^nb_bits) entries. The - bigger it is, the faster is the decoding. But it should not be too - big to save memory and L1 cache. '9' is a good compromise. - - 'nb_codes' : number of vlcs codes - - 'bits' : table which gives the size (in bits) of each vlc code. - - 'codes' : table which gives the bit pattern of of each vlc code. - - 'symbols' : table which gives the values to be returned from get_vlc(). - - 'xxx_wrap' : give the number of bytes between each entry of the - 'bits' or 'codes' tables. - - 'xxx_size' : gives the number of bytes of each entry of the 'bits' - or 'codes' tables. - - 'wrap' and 'size' allows to use any memory configuration and types - (byte/word/long) to store the 'bits', 'codes', and 'symbols' tables. - - 'use_static' should be set to 1 for tables, which should be freed - with av_free_static(), 0 if free_vlc() will be used. -*/ -void initVlcSparse(VLC *vlc, int nb_bits, int nb_codes, - const void *bits, int bits_wrap, int bits_size, - const void *codes, int codes_wrap, int codes_size, - const void *symbols, int symbols_wrap, int symbols_size) { - vlc->bits = nb_bits; - - if(vlc->table_size && vlc->table_size == vlc->table_allocated) { - return; - } else if(vlc->table_size) { - error("called on a partially initialized table"); - } - - if (build_table(vlc, nb_bits, nb_codes, - bits, bits_wrap, bits_size, - codes, codes_wrap, codes_size, - symbols, symbols_wrap, symbols_size, - 0, 0, 4 | 2) < 0) { - free(&vlc->table); - return; // Error - } - - if(vlc->table_size != vlc->table_allocated) - error("SVQ1 needed %d had %d", vlc->table_size, vlc->table_allocated); -} - -SVQ1Decoder::SVQ1Decoder(uint16 width, uint16 height) { - _surface = new Graphics::Surface(); - _surface->create(width, height, g_system->getScreenFormat()); - - _current[0] = new byte[width*height]; - _current[1] = new byte[(width/4)*(height/4)]; - _current[2] = new byte[(width/4)*(height/4)]; - - _last[0] = 0; - _last[1] = 0; - _last[2] = 0; - - // Setup Variable Length Code Tables - static int16 tableA[6][2]; - svq1_block_type.table = tableA; - svq1_block_type.table_allocated = 6; - svq1_block_type.table_size = 0; - initVlcSparse(&svq1_block_type, 2, 4, - &svq1_block_type_vlc[0][1], 2, 1, - &svq1_block_type_vlc[0][0], 2, 1, NULL, 0, 0); - - static int16 tableB[176][2]; - svq1_motion_component.table = tableB; - svq1_motion_component.table_allocated = 176; - svq1_motion_component.table_size = 0; - initVlcSparse(&svq1_motion_component, 7, 33, - &mvtab[0][1], 2, 1, - &mvtab[0][0], 2, 1, NULL, 0, 0); - - uint16 offset = 0; - for (uint8 i = 0; i < 6; i++) { - static const uint8 sizes[2][6] = {{14, 10, 14, 18, 16, 18}, {10, 10, 14, 14, 14, 16}}; - static int16 tableC[168][2]; - - svq1_intra_multistage[i].table = &tableC[offset]; - svq1_intra_multistage[i].table_allocated = sizes[0][i]; - svq1_intra_multistage[i].table_size = 0; - offset += sizes[0][i]; - initVlcSparse(&svq1_intra_multistage[i], 3, 8, - &svq1_intra_multistage_vlc[i][0][1], 2, 1, - &svq1_intra_multistage_vlc[i][0][0], 2, 1, NULL, 0, 0); - - svq1_inter_multistage[i].table = &tableC[offset]; - svq1_inter_multistage[i].table_allocated = sizes[1][i]; - svq1_inter_multistage[i].table_size = 0; - offset += sizes[1][i]; - initVlcSparse(&svq1_inter_multistage[i], 3, 8, - &svq1_inter_multistage_vlc[i][0][1], 2, 1, - &svq1_inter_multistage_vlc[i][0][0], 2, 1, NULL, 0, 0); - } - - static int16 tableD[632][2]; - svq1_intra_mean.table = tableD; - svq1_intra_mean.table_allocated = 632; - svq1_intra_mean.table_size = 0; - initVlcSparse(&svq1_intra_mean, 8, 256, - &svq1_intra_mean_vlc[0][1], 4, 2, - &svq1_intra_mean_vlc[0][0], 4, 2, NULL, 0, 0); - - static int16 tableE[1434][2]; - svq1_inter_mean.table = tableE; - svq1_inter_mean.table_allocated = 1434; - svq1_inter_mean.table_size = 0; - initVlcSparse(&svq1_inter_mean, 9, 512, - &svq1_inter_mean_vlc[0][1], 4, 2, - &svq1_inter_mean_vlc[0][0], 4, 2, NULL, 0, 0); -} - -SVQ1Decoder::~SVQ1Decoder() { - _surface->free(); - delete _surface; - - delete[] _current[0]; - delete[] _current[1]; - delete[] _current[2]; - - delete[] _last[0]; - delete[] _last[1]; - delete[] _last[2]; -} - -const Graphics::Surface *SVQ1Decoder::decodeImage(Common::SeekableReadStream *stream) { - debug(1, "SVQ1Decoder::decodeImage()"); - - Common::BitStream32BEMSB frameData(*stream); - - uint32 frameCode = frameData.getBits(22); - debug(1, " frameCode: %d", frameCode); - - if ((frameCode & ~0x70) || !(frameCode & 0x60)) { // Invalid - warning("Invalid Image at frameCode"); - return _surface; - } - - // swap some header bytes (why?) - //if (frameCode != 0x20) { - // uint32 *src = stream; - // - // for (i = 4; i < 8; i++) { - // src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i]; - // } - //} - -#if 0 - static const uint16 checksum_table[256] = { - 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, - 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, - 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, - 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, - 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, - 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, - 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, - 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, - 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, - 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, - 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, - 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, - 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, - 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, - 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, - 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, - 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, - 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, - 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, - 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, - 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, - 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, - 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, - 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, - 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, - 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, - 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, - 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, - 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, - 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, - 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, - 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 - }; -#endif - - byte temporalReference = frameData.getBits(8); - debug(1, " temporalReference: %d", temporalReference); - const char* types[4] = { "I (Key)", "P (Delta from Previous)", "B (Delta from Next)", "Invalid" }; - byte frameType = frameData.getBits(2); - debug(1, " frameType: %d = %s Frame", frameType, types[frameType]); - if (frameType == 0) { // I Frame - // TODO: Validate checksum if present - if (frameCode == 0x50 || frameCode == 0x60) { - uint32 checksum = frameData.getBits(16); - debug(1, " checksum:0x%02x", checksum); - //uint16 calculate_packet_checksum (const uint8 *data, const int length) { - // int value; - //for (int i = 0; i < length; i++) - // value = checksum_table[data[i] ^ (value >> 8)] ^ ((value & 0xFF) << 8); - } - } else if (frameType == 2) { // B Frame - warning("B Frames not supported by SVQ1 decoder"); - return _surface; - } else if (frameType == 3) { // Invalid - warning("Invalid Frame Type"); - return _surface; - } - - static const uint8 stringXORTable[256] = { - 0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54, - 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D, - 0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06, - 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F, - 0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0, - 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9, - 0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2, - 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B, - 0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9, - 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0, - 0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B, - 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2, - 0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D, - 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44, - 0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F, - 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16, - 0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB, - 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92, - 0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9, - 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0, - 0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F, - 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36, - 0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D, - 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64, - 0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26, - 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F, - 0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74, - 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D, - 0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82, - 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB, - 0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0, - 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9 - }; - - if ((frameCode ^ 0x10) >= 0x50) { - // Decode embedded string - Common::String str; - uint8 stringLen = frameData.getBits(8); - byte xorVal = stringXORTable[stringLen]; - - for (uint16 i = 0; i < stringLen-1; i++) { - byte data = frameData.getBits(8); - str += data ^ xorVal; - xorVal = stringXORTable[data]; - } - debug(1, " Embedded String of %d Characters: \"%s\"", stringLen, str.c_str()); - } - - byte unk1 = frameData.getBits(2); // Unknown - debug(1, " unk1: %d", unk1); - byte unk2 = frameData.getBits(2); // Unknown - debug(1, " unk2: %d", unk2); - bool unk3 = frameData.getBit(); // Unknown - debug(1, " unk3: %d", unk3); - - static const struct { uint w, h; } standardFrameSizes[7] = { - { 160, 120 }, // 0 - { 128, 96 }, // 1 - { 176, 144 }, // 2 - { 352, 288 }, // 3 - { 704, 576 }, // 4 - { 240, 180 }, // 5 - { 320, 240 } // 6 - }; - - byte frameSizeCode = frameData.getBits(3); - debug(1, " frameSizeCode: %d", frameSizeCode); - uint16 frameWidth, frameHeight; - if (frameSizeCode == 7) { - frameWidth = frameData.getBits(12); - frameHeight = frameData.getBits(12); - } else { - frameWidth = standardFrameSizes[frameSizeCode].w; - frameHeight = standardFrameSizes[frameSizeCode].h; - } - debug(1, " frameWidth: %d", frameWidth); - debug(1, " frameHeight: %d", frameHeight); - if (frameWidth == 0 || frameHeight == 0) { // Invalid - warning("Invalid Frame Size"); - return _surface; - } - bool checksumPresent = frameData.getBit(); - debug(1, " checksumPresent: %d", checksumPresent); - if (checksumPresent) { - bool usePacketChecksum = frameData.getBit(); - debug(1, " usePacketChecksum: %d", usePacketChecksum); - bool componentChecksumsAfterImageData = frameData.getBit(); - debug(1, " componentChecksumsAfterImageData: %d", componentChecksumsAfterImageData); - byte unk4 = frameData.getBits(2); - debug(1, " unk4: %d", unk4); - if (unk4 != 0) - warning("Invalid Frame Header in SVQ1 Frame Decode"); - } - - bool unk5 = frameData.getBit(); - debug(1, " unk5: %d", unk5); - if (unk5) { - bool unk6 = frameData.getBit(); - debug(1, " unk6: %d", unk6); - byte unk7 = frameData.getBits(4); - debug(1, " unk7: %d", unk7); - bool unk8 = frameData.getBit(); - debug(1, " unk8: %d", unk8); - byte unk9 = frameData.getBits(2); - debug(1, " unk9: %d", unk9); - while (frameData.getBit()) { - byte unk10 = frameData.getBits(8); - debug(1, " unk10: %d", unk10); - } - } - - if (frameWidth == _surface->w && frameHeight == _surface->h) { - // Decode Y, U and V component planes - for (int i = 0; i < 3; i++) { - int linesize, width, height; - if (i == 0) { - // Y Size is width * height - width = frameWidth; - if (width % 16) { - width /= 16; - width++; - width *= 16; - } - assert(width % 16 == 0); - height = frameHeight; - if (height % 16) { - height /= 16; - height++; - height *= 16; - } - assert(height % 16 == 0); - linesize = width; - } else { - // U and V size is width/4 * height/4 - width = frameWidth/4; - if (width % 16) { - width /= 16; - width++; - width *= 16; - } - assert(width % 16 == 0); - height = frameHeight/4; - if (height % 16) { - height /= 16; - height++; - height *= 16; - } - assert(height % 16 == 0); - linesize = width; - } - - if (frameType == 0) { // I Frame - // Keyframe (I) - byte *current = _current[i]; - for (uint16 y = 0; y < height; y += 16) { - for (uint16 x = 0; x < width; x += 16) { - if (int result = svq1DecodeBlockIntra(&frameData, ¤t[x], linesize) != 0) { - warning("Error in svq1DecodeBlock %i (keyframe)", result); - return _surface; - } - } - current += 16 * linesize; - } - } else { - // Delta frame (P or B) - - // Prediction Motion Vector - Common::Point *pmv = new Common::Point[(width/8) + 3]; - - byte *previous; - if(frameType == 2) { // B Frame - warning("B Frame not supported currently"); - //previous = _next[i]; - } else - previous = _last[i]; - - byte *current = _current[i]; - for (uint16 y = 0; y < height; y += 16) { - for (uint16 x = 0; x < width; x += 16) { - if (int result = svq1DecodeDeltaBlock(&frameData, ¤t[x], previous, linesize, pmv, x, y) != 0) { - warning("Error in svq1DecodeDeltaBlock %i", result); - return _surface; - } - } - - pmv[0].x = pmv[0].y = 0; - - current += 16*linesize; - } - delete[] pmv; - } - } - - convertYUV410ToRGB(_surface, _current[0], _current[1], _current[2], frameWidth, frameHeight, frameWidth, frameWidth/2); - } else - warning("FrameWidth/Height Sanity Check Failed!"); - - return _surface; -} - } // End of namespace Video |