diff options
Diffstat (limited to 'video/codecs/svq1.cpp')
-rw-r--r-- | video/codecs/svq1.cpp | 158 |
1 files changed, 75 insertions, 83 deletions
diff --git a/video/codecs/svq1.cpp b/video/codecs/svq1.cpp index 72fb299d8c..9d2faaa243 100644 --- a/video/codecs/svq1.cpp +++ b/video/codecs/svq1.cpp @@ -297,8 +297,8 @@ const Graphics::Surface *SVQ1Decoder::decodeImage(Common::SeekableReadStream *st byte *currentP = current[i]; for (uint16 y = 0; y < height; y += 16) { for (uint16 x = 0; x < width; x += 16) { - if (int result = svq1DecodeBlockIntra(&frameData, ¤tP[x], linesize) != 0) { - warning("Error in svq1DecodeBlock %i (keyframe)", result); + if (svq1DecodeBlockIntra(&frameData, ¤tP[x], linesize)) { + warning("svq1DecodeBlockIntra decode failure"); return _surface; } } @@ -320,8 +320,8 @@ const Graphics::Surface *SVQ1Decoder::decodeImage(Common::SeekableReadStream *st byte *currentP = current[i]; for (uint16 y = 0; y < height; y += 16) { for (uint16 x = 0; x < width; x += 16) { - if (int result = svq1DecodeDeltaBlock(&frameData, ¤tP[x], previous, linesize, pmv, x, y) != 0) { - warning("Error in svq1DecodeDeltaBlock %i", result); + if (svq1DecodeDeltaBlock(&frameData, ¤tP[x], previous, linesize, pmv, x, y)) { + warning("svq1DecodeDeltaBlock decode failure"); return _surface; } } @@ -344,7 +344,7 @@ const Graphics::Surface *SVQ1Decoder::decodeImage(Common::SeekableReadStream *st return _surface; } -int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) { +bool SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int pitch) { uint8 *list[63]; uint32 *dst; int entries[6]; @@ -357,7 +357,7 @@ int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int p list[0] = pixels; // recursively process vector - for (i=0, m=1, n=1, level=5; i < n; i++) { + for (i = 0, m = 1, n = 1, level = 5; i < n; i++) { // SVQ1_PROCESS_VECTOR() for (; level > 0; i++) { // process next depth @@ -383,7 +383,7 @@ int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int p stages = _intraMultistage[level]->getSymbol(*s) - 1; if (stages == -1) { - for (y=0; y < height; y++) { + for (y = 0; y < height; y++) { memset (&dst[y*(pitch / 4)], 0, width); } continue; // skip vector @@ -391,13 +391,13 @@ int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int p if ((stages > 0) && (level >= 4)) { warning("Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i", stages, level); - return -1; // invalid vector + return true; // error - invalid vector } mean = _intraMean->getSymbol(*s); if (stages == 0) { - for (y=0; y < height; y++) { + for (y = 0; y < height; y++) { memset (&dst[y*(pitch / 4)], mean, width); } } else { @@ -405,15 +405,15 @@ int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int p const uint32 *codebook = s_svq1IntraCodebooks[level]; uint32 bit_cache = s->getBits(4*stages); // calculate codebook entries for this vector - for (j=0; j < stages; j++) { + for (j = 0; j < stages; j++) { entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1); } mean -= (stages * 128); - n4 = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF); + n4 = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF); // SVQ1_DO_CODEBOOK_INTRA() - for (y=0; y < height; y++) { - for (x=0; x < (width / 4); x++, codebook++) { + for (y = 0; y < height; y++) { + for (x = 0; x < (width / 4); x++, codebook++) { n1 = n4; n2 = n4; // SVQ1_ADD_CODEBOOK() @@ -447,10 +447,10 @@ int SVQ1Decoder::svq1DecodeBlockIntra(Common::BitStream *s, uint8 *pixels, int p } } - return 0; + return false; } -int SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitch) { +bool SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, int pitch) { uint8 *list[63]; uint32 *dst; int entries[6]; @@ -463,7 +463,7 @@ int SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, in list[0] = pixels; // recursively process vector - for (i=0, m=1, n=1, level=5; i < n; i++) { + for (i = 0, m = 1, n = 1, level = 5; i < n; i++) { // SVQ1_PROCESS_VECTOR() for (; level > 0; i++) { // process next depth @@ -492,7 +492,7 @@ int SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, in if ((stages > 0) && (level >= 4)) { warning("Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i", stages, level); - return -1; // invalid vector + return true; // error - invalid vector } mean = _interMean->getSymbol(*s) - 256; @@ -508,8 +508,8 @@ int SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, in n4 = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF); // SVQ1_DO_CODEBOOK_NONINTRA() - for (y=0; y < height; y++) { - for (x=0; x < (width / 4); x++, codebook++) { + for (y = 0; y < height; y++) { + for (x = 0; x < (width / 4); x++, codebook++) { n3 = dst[x]; // add mean value to vector n1 = ((n3 & 0xFF00FF00) >> 8) + n4; @@ -543,7 +543,7 @@ int SVQ1Decoder::svq1DecodeBlockNonIntra(Common::BitStream *s, uint8 *pixels, in dst += (pitch / 4); } } - return 0; + return false; } // median of 3 @@ -562,14 +562,14 @@ static inline int mid_pred(int a, int b, int c) { return b; } -int SVQ1Decoder::svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, Common::Point **pmv) { - for (int i=0; i < 2; i++) { +bool SVQ1Decoder::svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, Common::Point **pmv) { + for (int i = 0; i < 2; i++) { // get motion code int diff = _motionComponent->getSymbol(*s); if (diff < 0) - return -1; + return true; // error - invalid motion code else if (diff) { - if (s->getBit()) diff= -diff; + if (s->getBit()) diff = -diff; } // add median of motion vector predictors and clip result @@ -579,7 +579,7 @@ int SVQ1Decoder::svq1DecodeMotionVector(Common::BitStream *s, Common::Point *mv, mv->x = ((diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26; } - return 0; + return false; } void SVQ1Decoder::svq1SkipBlock(uint8 *current, uint8 *previous, int pitch, int x, int y) { @@ -680,14 +680,14 @@ static void put_pixels16_xy2_c(uint8 *block, const uint8 *pixels, int line_size, put_pixels8_xy2_c(block+8, pixels+8, line_size, h); } -int SVQ1Decoder::svq1MotionInterBlock(Common::BitStream *ss, +bool SVQ1Decoder::svq1MotionInterBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch, Common::Point *motion, int x, int y) { uint8 *src; uint8 *dst; Common::Point mv; Common::Point *pmv[3]; - int result; + bool errorFlag; // predict and decode motion vector pmv[0] = &motion[0]; @@ -698,27 +698,22 @@ int SVQ1Decoder::svq1MotionInterBlock(Common::BitStream *ss, pmv[2] = &motion[(x / 8) + 4]; } - result = svq1DecodeMotionVector(ss, &mv, pmv); + errorFlag = svq1DecodeMotionVector(ss, &mv, pmv); + if (errorFlag) + return true; - if (result != 0) - return result; + motion[0].x = motion[(x / 8) + 2].x = motion[(x / 8) + 3].x = mv.x; + motion[0].y = motion[(x / 8) + 2].y = motion[(x / 8) + 3].y = mv.y; - motion[0].x = - motion[(x / 8) + 2].x = - motion[(x / 8) + 3].x = mv.x; - motion[0].y = - motion[(x / 8) + 2].y = - motion[(x / 8) + 3].y = mv.y; - - if(y + (mv.y >> 1)<0) - mv.y= 0; - if(x + (mv.x >> 1)<0) - mv.x= 0; + if(y + (mv.y >> 1) < 0) + mv.y = 0; + if(x + (mv.x >> 1) < 0) + mv.x = 0; #if 0 - int w = (s->width+15)&~15; - int h = (s->height+15)&~15; - if(x + (mv.x >> 1)<0 || y + (mv.y >> 1)<0 || x + (mv.x >> 1) + 16 > w || y + (mv.y >> 1) + 16> h) + int w = (s->width + 15) & ~15; + int h = (s->height + 15) & ~15; + if(x + (mv.x >> 1) < 0 || y + (mv.y >> 1) < 0 || x + (mv.x >> 1) + 16 > w || y + (mv.y >> 1) + 16 > h) debug(1, "%d %d %d %d", x, y, x + (mv.x >> 1), y + (mv.y >> 1)); #endif @@ -746,17 +741,17 @@ int SVQ1Decoder::svq1MotionInterBlock(Common::BitStream *ss, break; } - return 0; + return false; } -int SVQ1Decoder::svq1MotionInter4vBlock(Common::BitStream *ss, +bool SVQ1Decoder::svq1MotionInter4vBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch, Common::Point *motion, int x, int y) { uint8 *src; uint8 *dst; Common::Point mv; Common::Point *pmv[4]; - int i, result; + bool errorFlag; // predict and decode motion vector (0) pmv[0] = &motion[0]; @@ -767,10 +762,9 @@ int SVQ1Decoder::svq1MotionInter4vBlock(Common::BitStream *ss, pmv[2] = &motion[(x / 8) + 4]; } - result = svq1DecodeMotionVector(ss, &mv, pmv); - - if (result != 0) - return result; + errorFlag = svq1DecodeMotionVector(ss, &mv, pmv); + if (errorFlag) + return true; // predict and decode motion vector (1) pmv[0] = &mv; @@ -779,44 +773,42 @@ int SVQ1Decoder::svq1MotionInter4vBlock(Common::BitStream *ss, } else { pmv[1] = &motion[(x / 8) + 3]; } - result = svq1DecodeMotionVector(ss, &motion[0], pmv); - if (result != 0) - return result; + errorFlag = svq1DecodeMotionVector(ss, &motion[0], pmv); + if (errorFlag) + return true; // predict and decode motion vector (2) pmv[1] = &motion[0]; pmv[2] = &motion[(x / 8) + 1]; - result = svq1DecodeMotionVector(ss, &motion[(x / 8) + 2], pmv); - - if (result != 0) - return result; + errorFlag = svq1DecodeMotionVector(ss, &motion[(x / 8) + 2], pmv); + if (errorFlag) + return true; // predict and decode motion vector (3) pmv[2] = &motion[(x / 8) + 2]; pmv[3] = &motion[(x / 8) + 3]; - result = svq1DecodeMotionVector(ss, pmv[3], pmv); - - if (result != 0) - return result; + errorFlag = svq1DecodeMotionVector(ss, pmv[3], pmv); + if (errorFlag) + return true; // form predictions - for (i=0; i < 4; i++) { - int mvx = pmv[i]->x + (i&1)*16; - int mvy = pmv[i]->y + (i>>1)*16; + for (int i = 0; i < 4; i++) { + int mvx = pmv[i]->x + (i & 1)*16; + int mvy = pmv[i]->y + (i >> 1)*16; ///XXX /FIXME clipping or padding? - if(y + (mvy >> 1)<0) + if(y + (mvy >> 1) < 0) mvy = 0; - if(x + (mvx >> 1)<0) + if(x + (mvx >> 1) < 0) mvx = 0; #if 0 - int w = (s->width+15)&~15; - int h = (s->height+15)&~15; - if(x + (mvx >> 1)<0 || y + (mvy >> 1)<0 || x + (mvx >> 1) + 8 > w || y + (mvy >> 1) + 8> h) + int w = (s->width + 15) & ~15; + int h = (s->height + 15) & ~15; + if(x + (mvx >> 1) < 0 || y + (mvy >> 1) < 0 || x + (mvx >> 1) + 8 > w || y + (mvy >> 1) + 8 > h) debug(1, "%d %d %d %d", x, y, x + (mvx >> 1), y + (mvy >> 1)); #endif src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1))*pitch]; @@ -851,14 +843,14 @@ int SVQ1Decoder::svq1MotionInter4vBlock(Common::BitStream *ss, } } - return 0; + return false; } -int SVQ1Decoder::svq1DecodeDeltaBlock(Common::BitStream *ss, +bool SVQ1Decoder::svq1DecodeDeltaBlock(Common::BitStream *ss, uint8 *current, uint8 *previous, int pitch, Common::Point *motion, int x, int y) { uint32 block_type; - int result = 0; + bool errorFlag = false; // get block type block_type = _blockType->getSymbol(*ss); @@ -879,29 +871,29 @@ int SVQ1Decoder::svq1DecodeDeltaBlock(Common::BitStream *ss, break; case SVQ1_BLOCK_INTER: - result = svq1MotionInterBlock(ss, current, previous, pitch, motion, x, y); - if (result != 0) { - warning("Error in svq1MotionInterBlock %i", result); + errorFlag = svq1MotionInterBlock(ss, current, previous, pitch, motion, x, y); + if (errorFlag) { + warning("svq1MotionInterBlock decode failure"); break; } - result = svq1DecodeBlockNonIntra(ss, current, pitch); + errorFlag = svq1DecodeBlockNonIntra(ss, current, pitch); break; case SVQ1_BLOCK_INTER_4V: - result = svq1MotionInter4vBlock(ss, current, previous, pitch, motion, x, y); - if (result != 0) { - warning("Error in svq1MotionInter4vBlock %i", result); + errorFlag = svq1MotionInter4vBlock(ss, current, previous, pitch, motion, x, y); + if (errorFlag) { + warning("svq1MotionInter4vBlock decode failure"); break; } - result = svq1DecodeBlockNonIntra(ss, current, pitch); + errorFlag = svq1DecodeBlockNonIntra(ss, current, pitch); break; case SVQ1_BLOCK_INTRA: - result = svq1DecodeBlockIntra(ss, current, pitch); + errorFlag = svq1DecodeBlockIntra(ss, current, pitch); break; } - return result; + return errorFlag; } } // End of namespace Video |