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author | Diego Biurrun <diego@biurrun.de> | 2005-12-22 01:10:11 +0000 |
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committer | Diego Biurrun <diego@biurrun.de> | 2005-12-22 01:10:11 +0000 |
commit | bb270c0896b39e1ae9277355e3c120ed3feb64a3 (patch) | |
tree | fc2fc2b1216d19acb3879abb6ea5a3b400f43fe4 /libavcodec/qpeg.c | |
parent | 50827fcf44f34521df4708cdb633809b56fb9df3 (diff) | |
download | ffmpeg-bb270c0896b39e1ae9277355e3c120ed3feb64a3.tar.gz |
COSMETICS: tabs --> spaces, some prettyprinting
Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/qpeg.c')
-rw-r--r-- | libavcodec/qpeg.c | 306 |
1 files changed, 153 insertions, 153 deletions
diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c index 56a8d0e0d7..6b2daa8721 100644 --- a/libavcodec/qpeg.c +++ b/libavcodec/qpeg.c @@ -33,7 +33,7 @@ typedef struct QpegContext{ } QpegContext; static void qpeg_decode_intra(uint8_t *src, uint8_t *dst, int size, - int stride, int width, int height) + int stride, int width, int height) { int i; int code; @@ -47,64 +47,64 @@ static void qpeg_decode_intra(uint8_t *src, uint8_t *dst, int size, dst = dst + height * stride; while((size > 0) && (rows_to_go > 0)) { - code = *src++; - size--; - run = copy = 0; - if(code == 0xFC) /* end-of-picture code */ - break; - if(code >= 0xF8) { /* very long run */ - c0 = *src++; - c1 = *src++; - size -= 2; - run = ((code & 0x7) << 16) + (c0 << 8) + c1 + 2; - } else if (code >= 0xF0) { /* long run */ - c0 = *src++; - size--; - run = ((code & 0xF) << 8) + c0 + 2; - } else if (code >= 0xE0) { /* short run */ - run = (code & 0x1F) + 2; - } else if (code >= 0xC0) { /* very long copy */ - c0 = *src++; - c1 = *src++; - size -= 2; - copy = ((code & 0x3F) << 16) + (c0 << 8) + c1 + 1; - } else if (code >= 0x80) { /* long copy */ - c0 = *src++; - size--; - copy = ((code & 0x7F) << 8) + c0 + 1; - } else { /* short copy */ - copy = code + 1; - } - - /* perform actual run or copy */ - if(run) { - int p; - - p = *src++; - size--; - for(i = 0; i < run; i++) { - dst[filled++] = p; - if (filled >= width) { - filled = 0; - dst -= stride; + code = *src++; + size--; + run = copy = 0; + if(code == 0xFC) /* end-of-picture code */ + break; + if(code >= 0xF8) { /* very long run */ + c0 = *src++; + c1 = *src++; + size -= 2; + run = ((code & 0x7) << 16) + (c0 << 8) + c1 + 2; + } else if (code >= 0xF0) { /* long run */ + c0 = *src++; + size--; + run = ((code & 0xF) << 8) + c0 + 2; + } else if (code >= 0xE0) { /* short run */ + run = (code & 0x1F) + 2; + } else if (code >= 0xC0) { /* very long copy */ + c0 = *src++; + c1 = *src++; + size -= 2; + copy = ((code & 0x3F) << 16) + (c0 << 8) + c1 + 1; + } else if (code >= 0x80) { /* long copy */ + c0 = *src++; + size--; + copy = ((code & 0x7F) << 8) + c0 + 1; + } else { /* short copy */ + copy = code + 1; + } + + /* perform actual run or copy */ + if(run) { + int p; + + p = *src++; + size--; + for(i = 0; i < run; i++) { + dst[filled++] = p; + if (filled >= width) { + filled = 0; + dst -= stride; rows_to_go--; if(rows_to_go <= 0) break; - } - } - } else { + } + } + } else { size -= copy; - for(i = 0; i < copy; i++) { - dst[filled++] = *src++; - if (filled >= width) { - filled = 0; - dst -= stride; + for(i = 0; i < copy; i++) { + dst[filled++] = *src++; + if (filled >= width) { + filled = 0; + dst -= stride; rows_to_go--; if(rows_to_go <= 0) break; - } - } - } + } + } + } } } @@ -115,8 +115,8 @@ static int qpeg_table_w[16] = /* Decodes delta frames */ static void qpeg_decode_inter(uint8_t *src, uint8_t *dst, int size, - int stride, int width, int height, - int delta, uint8_t *ctable, uint8_t *refdata) + int stride, int width, int height, + int delta, uint8_t *ctable, uint8_t *refdata) { int i, j; int code; @@ -126,7 +126,7 @@ static void qpeg_decode_inter(uint8_t *src, uint8_t *dst, int size, /* copy prev frame */ for(i = 0; i < height; i++) - memcpy(refdata + (i * width), dst + (i * stride), width); + memcpy(refdata + (i * width), dst + (i * stride), width); orig_height = height; blkdata = src - 0x86; @@ -134,36 +134,36 @@ static void qpeg_decode_inter(uint8_t *src, uint8_t *dst, int size, dst = dst + height * stride; while((size > 0) && (height >= 0)) { - code = *src++; - size--; - - if(delta) { - /* motion compensation */ - while((code & 0xF0) == 0xF0) { - if(delta == 1) { - int me_idx; - int me_w, me_h, me_x, me_y; - uint8_t *me_plane; - int corr, val; - - /* get block size by index */ - me_idx = code & 0xF; - me_w = qpeg_table_w[me_idx]; - me_h = qpeg_table_h[me_idx]; - - /* extract motion vector */ - corr = *src++; - size--; - - val = corr >> 4; - if(val > 7) - val -= 16; - me_x = val; - - val = corr & 0xF; - if(val > 7) - val -= 16; - me_y = val; + code = *src++; + size--; + + if(delta) { + /* motion compensation */ + while((code & 0xF0) == 0xF0) { + if(delta == 1) { + int me_idx; + int me_w, me_h, me_x, me_y; + uint8_t *me_plane; + int corr, val; + + /* get block size by index */ + me_idx = code & 0xF; + me_w = qpeg_table_w[me_idx]; + me_h = qpeg_table_h[me_idx]; + + /* extract motion vector */ + corr = *src++; + size--; + + val = corr >> 4; + if(val > 7) + val -= 16; + me_x = val; + + val = corr & 0xF; + if(val > 7) + val -= 16; + me_y = val; /* check motion vector */ if ((me_x + filled < 0) || (me_x + me_w + filled > width) || @@ -178,73 +178,73 @@ static void qpeg_decode_inter(uint8_t *src, uint8_t *dst, int size, for(i = 0; i < me_w; i++) dst[filled + i - (j * stride)] = me_plane[i - (j * width)]; } - } - } - code = *src++; - size--; - } - } - - if(code == 0xE0) /* end-of-picture code */ - break; - if(code > 0xE0) { /* run code: 0xE1..0xFF */ - int p; - - code &= 0x1F; - p = *src++; - size--; - for(i = 0; i <= code; i++) { - dst[filled++] = p; - if(filled >= width) { - filled = 0; - dst -= stride; - height--; - } - } - } else if(code >= 0xC0) { /* copy code: 0xC0..0xDF */ - code &= 0x1F; - - for(i = 0; i <= code; i++) { - dst[filled++] = *src++; - if(filled >= width) { - filled = 0; - dst -= stride; - height--; - } - } - size -= code + 1; - } else if(code >= 0x80) { /* skip code: 0x80..0xBF */ - int skip; - - code &= 0x3F; - /* codes 0x80 and 0x81 are actually escape codes, - skip value minus constant is in the next byte */ - if(!code) - skip = (*src++) + 64; - else if(code == 1) - skip = (*src++) + 320; - else - skip = code; - filled += skip; - while( filled >= width) { - filled -= width; - dst -= stride; - height--; + } + } + code = *src++; + size--; + } + } + + if(code == 0xE0) /* end-of-picture code */ + break; + if(code > 0xE0) { /* run code: 0xE1..0xFF */ + int p; + + code &= 0x1F; + p = *src++; + size--; + for(i = 0; i <= code; i++) { + dst[filled++] = p; + if(filled >= width) { + filled = 0; + dst -= stride; + height--; + } + } + } else if(code >= 0xC0) { /* copy code: 0xC0..0xDF */ + code &= 0x1F; + + for(i = 0; i <= code; i++) { + dst[filled++] = *src++; + if(filled >= width) { + filled = 0; + dst -= stride; + height--; + } + } + size -= code + 1; + } else if(code >= 0x80) { /* skip code: 0x80..0xBF */ + int skip; + + code &= 0x3F; + /* codes 0x80 and 0x81 are actually escape codes, + skip value minus constant is in the next byte */ + if(!code) + skip = (*src++) + 64; + else if(code == 1) + skip = (*src++) + 320; + else + skip = code; + filled += skip; + while( filled >= width) { + filled -= width; + dst -= stride; + height--; if(height < 0) break; - } - } else { - /* zero code treated as one-pixel skip */ - if(code) - dst[filled++] = ctable[code & 0x7F]; - else - filled++; - if(filled >= width) { - filled = 0; - dst -= stride; - height--; - } - } + } + } else { + /* zero code treated as one-pixel skip */ + if(code) + dst[filled++] = ctable[code & 0x7F]; + else + filled++; + if(filled >= width) { + filled = 0; + dst -= stride; + height--; + } + } } } @@ -267,10 +267,10 @@ static int decode_frame(AVCodecContext *avctx, } outdata = a->pic.data[0]; if(buf[0x85] == 0x10) { - qpeg_decode_intra(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height); + qpeg_decode_intra(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height); } else { - delta = buf[0x85]; - qpeg_decode_inter(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height, delta, buf + 4, a->refdata); + delta = buf[0x85]; + qpeg_decode_inter(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height, delta, buf + 4, a->refdata); } /* make the palette available on the way out */ |