mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 1845 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Michael Niedermayer
22 years ago
parent
a466e345e4
commit
8b82a95675
7 changed files with 862 additions and 12 deletions
@ -0,0 +1,770 @@ |
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/*
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* Copyright (c) 2003 The FFmpeg Project. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* |
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* How to use this decoder: |
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* SVQ3 data is transported within Apple Quicktime files. Quicktime files |
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* have stsd atoms to describe media trak properties. Sometimes the stsd |
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* atom contains information that the decoder must know in order to function |
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* properly. Such is the case with SVQ3. In order to get the best use out |
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* of this decoder, the calling app must make the video stsd atom available |
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* via the AVCodecContext's extradata[_size] field: |
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* |
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* AVCodecContext.extradata = pointer to stsd, first characters are expected |
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* to be 's', 't', 's', and 'd', NOT the atom length |
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* AVCodecContext.extradata_size = size of stsd atom memory buffer (which
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* will be the same as the stsd atom size field from the QT file, minus 4 |
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* bytes since the length is missing. |
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* |
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*/ |
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/**
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* @file svq3.c |
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* svq3 decoder. |
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*/ |
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static const uint8_t svq3_scan[16]={ |
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0+0*4, 1+0*4, 2+0*4, 2+1*4, |
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2+2*4, 3+0*4, 3+1*4, 3+2*4, |
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0+1*4, 0+2*4, 1+1*4, 1+2*4, |
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0+3*4, 1+3*4, 2+3*4, 3+3*4, |
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}; |
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static const uint8_t svq3_pred_0[25][2] = { |
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{ 0, 0 }, |
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{ 1, 0 }, { 0, 1 }, |
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{ 0, 2 }, { 1, 1 }, { 2, 0 }, |
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{ 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 }, |
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{ 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 }, |
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{ 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 }, |
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{ 2, 4 }, { 3, 3 }, { 4, 2 }, |
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{ 4, 3 }, { 3, 4 }, |
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{ 4, 4 } |
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}; |
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static const int8_t svq3_pred_1[6][6][5] = { |
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{ { 2,-1,-1,-1,-1 }, { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, |
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{ 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, { 1, 2,-1,-1,-1 } }, |
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{ { 0, 2,-1,-1,-1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 }, |
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{ 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } }, |
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{ { 2, 0,-1,-1,-1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 }, |
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{ 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } }, |
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{ { 2, 0,-1,-1,-1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 }, |
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{ 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } }, |
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{ { 0, 2,-1,-1,-1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 }, |
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{ 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } }, |
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{ { 0, 2,-1,-1,-1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 }, |
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{ 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } }, |
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}; |
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static const struct { uint8_t run; uint8_t level; } svq3_dct_tables[2][16] = { |
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{ { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 }, |
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{ 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } }, |
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{ { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 }, |
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{ 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } } |
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}; |
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static const uint32_t svq3_dequant_coeff[32] = { |
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3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718, |
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9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873, |
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24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683, |
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61694, 68745, 77615, 89113,100253,109366,126635,141533 |
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}; |
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static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp){ |
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const int qmul= svq3_dequant_coeff[qp]; |
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#define stride 16 |
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int i; |
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int temp[16]; |
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static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride}; |
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static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride}; |
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for(i=0; i<4; i++){ |
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const int offset= y_offset[i]; |
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const int z0= 13*(block[offset+stride*0] + block[offset+stride*4]); |
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const int z1= 13*(block[offset+stride*0] - block[offset+stride*4]); |
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const int z2= 7* block[offset+stride*1] - 17*block[offset+stride*5]; |
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const int z3= 17* block[offset+stride*1] + 7*block[offset+stride*5]; |
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temp[4*i+0]= z0+z3; |
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temp[4*i+1]= z1+z2; |
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temp[4*i+2]= z1-z2; |
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temp[4*i+3]= z0-z3; |
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} |
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for(i=0; i<4; i++){ |
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const int offset= x_offset[i]; |
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const int z0= 13*(temp[4*0+i] + temp[4*2+i]); |
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const int z1= 13*(temp[4*0+i] - temp[4*2+i]); |
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const int z2= 7* temp[4*1+i] - 17*temp[4*3+i]; |
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const int z3= 17* temp[4*1+i] + 7*temp[4*3+i]; |
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block[stride*0 +offset]= ((z0 + z3)*qmul + 0x80000)>>20; |
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block[stride*2 +offset]= ((z1 + z2)*qmul + 0x80000)>>20; |
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block[stride*8 +offset]= ((z1 - z2)*qmul + 0x80000)>>20; |
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block[stride*10+offset]= ((z0 - z3)*qmul + 0x80000)>>20; |
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} |
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} |
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#undef stride |
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static void svq3_add_idct_c (uint8_t *dst, DCTELEM *block, int stride, int qp, int dc){ |
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const int qmul= svq3_dequant_coeff[qp]; |
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int i; |
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uint8_t *cm = cropTbl + MAX_NEG_CROP; |
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if (dc) { |
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dc = 13*13*((dc == 1) ? 1538*block[0] : ((qmul*(block[0] >> 3)) / 2)); |
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block[0] = 0; |
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} |
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for (i=0; i < 4; i++) { |
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const int z0= 13*(block[0 + 4*i] + block[2 + 4*i]); |
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const int z1= 13*(block[0 + 4*i] - block[2 + 4*i]); |
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const int z2= 7* block[1 + 4*i] - 17*block[3 + 4*i]; |
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const int z3= 17* block[1 + 4*i] + 7*block[3 + 4*i]; |
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block[0 + 4*i]= z0 + z3; |
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block[1 + 4*i]= z1 + z2; |
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block[2 + 4*i]= z1 - z2; |
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block[3 + 4*i]= z0 - z3; |
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} |
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for (i=0; i < 4; i++) { |
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const int z0= 13*(block[i + 4*0] + block[i + 4*2]); |
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const int z1= 13*(block[i + 4*0] - block[i + 4*2]); |
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const int z2= 7* block[i + 4*1] - 17*block[i + 4*3]; |
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const int z3= 17* block[i + 4*1] + 7*block[i + 4*3]; |
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const int rr= (dc + 0x80000); |
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dst[i + stride*0]= cm[ dst[i + stride*0] + (((z0 + z3)*qmul + rr) >> 20) ]; |
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dst[i + stride*1]= cm[ dst[i + stride*1] + (((z1 + z2)*qmul + rr) >> 20) ]; |
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dst[i + stride*2]= cm[ dst[i + stride*2] + (((z1 - z2)*qmul + rr) >> 20) ]; |
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dst[i + stride*3]= cm[ dst[i + stride*3] + (((z0 - z3)*qmul + rr) >> 20) ]; |
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} |
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} |
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static void pred4x4_down_left_svq3_c(uint8_t *src, uint8_t *topright, int stride){ |
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LOAD_TOP_EDGE
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LOAD_LEFT_EDGE
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const __attribute__((unused)) int unu0= t0; |
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const __attribute__((unused)) int unu1= l0; |
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src[0+0*stride]=(l1 + t1)>>1; |
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src[1+0*stride]= |
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src[0+1*stride]=(l2 + t2)>>1; |
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src[2+0*stride]= |
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src[1+1*stride]= |
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src[0+2*stride]= |
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src[3+0*stride]= |
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src[2+1*stride]= |
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src[1+2*stride]= |
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src[0+3*stride]= |
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src[3+1*stride]= |
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src[2+2*stride]= |
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src[1+3*stride]= |
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src[3+2*stride]= |
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src[2+3*stride]= |
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src[3+3*stride]=(l3 + t3)>>1; |
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}; |
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static void pred16x16_plane_svq3_c(uint8_t *src, int stride){ |
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pred16x16_plane_compat_c(src, stride, 1); |
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} |
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static inline int svq3_decode_block (GetBitContext *gb, DCTELEM *block, |
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int index, const int type) { |
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static const uint8_t *const scan_patterns[4] = |
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{ luma_dc_zigzag_scan, zigzag_scan, svq3_scan, chroma_dc_scan }; |
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int run, level, sign, vlc, limit; |
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const int intra = (3 * type) >> 2; |
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const uint8_t *const scan = scan_patterns[type]; |
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for (limit=(16 >> intra); index < 16; index=limit, limit+=8) { |
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for (; (vlc = svq3_get_ue_golomb (gb)) != 0; index++) { |
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if (vlc == INVALID_VLC) |
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return -1; |
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sign = (vlc & 0x1) - 1; |
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vlc = (vlc + 1) >> 1; |
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if (type == 3) { |
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if (vlc < 3) { |
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run = 0; |
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level = vlc; |
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} else if (vlc < 4) { |
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run = 1; |
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level = 1; |
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} else { |
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run = (vlc & 0x3); |
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level = ((vlc + 9) >> 2) - run; |
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} |
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} else { |
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if (vlc < 16) { |
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run = svq3_dct_tables[intra][vlc].run; |
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level = svq3_dct_tables[intra][vlc].level; |
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} else if (intra) { |
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run = (vlc & 0x7); |
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level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1))); |
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} else { |
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run = (vlc & 0xF); |
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level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0))); |
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} |
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} |
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if ((index += run) >= limit) |
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return -1; |
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block[scan[index]] = (level ^ sign) - sign; |
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} |
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if (type != 2) { |
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break; |
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} |
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} |
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return 0; |
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} |
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static void sixpel_mc_put (MpegEncContext *s, |
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uint8_t *src, uint8_t *dst, int stride, |
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int dxy, int width, int height) { |
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int i, j; |
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switch (dxy) { |
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case 6*0+0: |
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for (i=0; i < height; i++) { |
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memcpy (dst, src, width); |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*0+2: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (683*(2*src[j] + src[j+1] + 1)) >> 11; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*0+3: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (src[j] + src[j+1] + 1) >> 1; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*0+4: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (683*(src[j] + 2*src[j+1] + 1)) >> 11; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*2+0: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (683*(2*src[j] + src[j+stride] + 1)) >> 11; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*2+2: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (2731*(4*src[j] + 3*src[j+1] + 3*src[j+stride] + 2*src[j+stride+1] + 6)) >> 15; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*2+4: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (2731*(3*src[j] + 4*src[j+1] + 2*src[j+stride] + 3*src[j+stride+1] + 6)) >> 15; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*3+0: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (src[j] + src[j+stride]+1) >> 1; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*3+3: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (src[j] + src[j+1] + src[j+stride] + src[j+stride+1] + 2) >> 2; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*4+0: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (683*(src[j] + 2*src[j+stride] + 1)) >> 11; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*4+2: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (2731*(3*src[j] + 2*src[j+1] + 4*src[j+stride] + 3*src[j+stride+1] + 6)) >> 15; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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case 6*4+4: |
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for (i=0; i < height; i++) { |
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for (j=0; j < width; j++) { |
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dst[j] = (2731*(2*src[j] + 3*src[j+1] + 3*src[j+stride] + 4*src[j+stride+1] + 6)) >> 15; |
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} |
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src += stride; |
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dst += stride; |
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} |
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break; |
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} |
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} |
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static inline void svq3_mc_dir_part (MpegEncContext *s, int x, int y, |
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int width, int height, int mx, int my) { |
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uint8_t *src, *dest; |
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int i, emu = 0; |
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const int sx = ((unsigned) (mx + 0x7FFFFFFE)) % 6; |
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const int sy = ((unsigned) (my + 0x7FFFFFFE)) % 6; |
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const int dxy= 6*sy + sx; |
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/* decode and clip motion vector to frame border (+16) */ |
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mx = x + (mx - sx) / 6; |
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my = y + (my - sy) / 6; |
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if (mx < 0 || mx >= (s->width - width - 1) || |
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my < 0 || my >= (s->height - height - 1)) { |
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if ((s->flags & CODEC_FLAG_EMU_EDGE)) { |
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emu = 1; |
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} |
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mx = clip (mx, -16, (s->width - width + 15)); |
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my = clip (my, -16, (s->height - height + 15)); |
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} |
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/* form component predictions */ |
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dest = s->current_picture.data[0] + x + y*s->linesize; |
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src = s->last_picture.data[0] + mx + my*s->linesize; |
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if (emu) { |
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ff_emulated_edge_mc (s, src, s->linesize, (width + 1), (height + 1), |
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mx, my, s->width, s->height); |
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src = s->edge_emu_buffer; |
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} |
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sixpel_mc_put (s, src, dest, s->linesize, dxy, width, height); |
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if (!(s->flags & CODEC_FLAG_GRAY)) { |
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mx = (mx + (mx < (int) x)) >> 1; |
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my = (my + (my < (int) y)) >> 1; |
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width = (width >> 1); |
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height = (height >> 1); |
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for (i=1; i < 3; i++) { |
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dest = s->current_picture.data[i] + (x >> 1) + (y >> 1)*s->uvlinesize; |
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src = s->last_picture.data[i] + mx + my*s->uvlinesize; |
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if (emu) { |
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ff_emulated_edge_mc (s, src, s->uvlinesize, (width + 1), (height + 1), |
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mx, my, (s->width >> 1), (s->height >> 1)); |
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src = s->edge_emu_buffer; |
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} |
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sixpel_mc_put (s, src, dest, s->uvlinesize, dxy, width, height); |
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} |
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} |
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} |
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static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { |
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int cbp, dir, mode, mx, my, dx, dy, x, y, part_width, part_height; |
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int i, j, k, l, m; |
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uint32_t vlc; |
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int8_t *top, *left; |
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MpegEncContext *const s = (MpegEncContext *) h; |
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const int mb_xy = s->mb_x + s->mb_y*s->mb_stride; |
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const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride; |
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h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF; |
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h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF; |
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h->topright_samples_available = 0xFFFF; |
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if (mb_type == 0) { /* SKIP */ |
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svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0); |
||||
|
||||
cbp = 0; |
||||
mb_type = MB_TYPE_SKIP; |
||||
} else if (mb_type < 8) { /* INTER */ |
||||
if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) { |
||||
mode = 3; /* thirdpel */ |
||||
} else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) { |
||||
mode = 2; /* halfpel */ |
||||
} else { |
||||
mode = 1; /* fullpel */ |
||||
} |
||||
|
||||
/* fill caches */ |
||||
memset (h->ref_cache[0], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t)); |
||||
|
||||
if (s->mb_x > 0) { |
||||
for (i=0; i < 4; i++) { |
||||
*(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - 1 + i*h->b_stride]; |
||||
h->ref_cache[0][scan8[0] - 1 + i*8] = 1; |
||||
} |
||||
} else { |
||||
for (i=0; i < 4; i++) { |
||||
*(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = 0; |
||||
h->ref_cache[0][scan8[0] - 1 + i*8] = 1; |
||||
} |
||||
} |
||||
if (s->mb_y > 0) { |
||||
memcpy (h->mv_cache[0][scan8[0] - 1*8], s->current_picture.motion_val[0][b_xy - h->b_stride], 4*2*sizeof(int16_t)); |
||||
memset (&h->ref_cache[0][scan8[0] - 1*8], 1, 4); |
||||
|
||||
if (s->mb_x < (s->mb_width - 1)) { |
||||
*(uint32_t *) h->mv_cache[0][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride + 4]; |
||||
h->ref_cache[0][scan8[0] + 4 - 1*8] = 1; |
||||
} |
||||
if (s->mb_x > 0) { |
||||
*(uint32_t *) h->mv_cache[0][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride - 1]; |
||||
h->ref_cache[0][scan8[0] - 1 - 1*8] = 1; |
||||
} |
||||
} |
||||
|
||||
/* decode motion vector(s) and form prediction(s) */ |
||||
part_width = ((mb_type & 5) == 5) ? 4 : 8 << (mb_type & 1); |
||||
part_height = 16 >> ((unsigned) mb_type / 3); |
||||
|
||||
for (i=0; i < 16; i+=part_height) { |
||||
for (j=0; j < 16; j+=part_width) { |
||||
x = 16*s->mb_x + j; |
||||
y = 16*s->mb_y + i; |
||||
k = ((j>>2)&1) + ((i>>1)&2) + ((j>>1)&4) + (i&8); |
||||
|
||||
pred_motion (h, k, (part_width >> 2), 0, 1, &mx, &my); |
||||
|
||||
/* clip motion vector prediction to frame border */ |
||||
mx = clip (mx, -6*x, 6*(s->width - part_width - x)); |
||||
my = clip (my, -6*y, 6*(s->height - part_height - y)); |
||||
|
||||
/* get motion vector differential */ |
||||
dy = svq3_get_se_golomb (&s->gb); |
||||
dx = svq3_get_se_golomb (&s->gb); |
||||
|
||||
if (dx == INVALID_VLC || dy == INVALID_VLC) { |
||||
return -1; |
||||
} |
||||
|
||||
/* compute motion vector */ |
||||
if (mode == 3) { |
||||
mx = ((mx + 1) & ~0x1) + 2*dx; |
||||
my = ((my + 1) & ~0x1) + 2*dy; |
||||
} else if (mode == 2) { |
||||
mx = (mx + 1) - ((unsigned) (0x7FFFFFFF + mx) % 3) + 3*dx; |
||||
my = (my + 1) - ((unsigned) (0x7FFFFFFF + my) % 3) + 3*dy; |
||||
} else if (mode == 1) { |
||||
mx = (mx + 3) - ((unsigned) (0x7FFFFFFB + mx) % 6) + 6*dx; |
||||
my = (my + 3) - ((unsigned) (0x7FFFFFFB + my) % 6) + 6*dy; |
||||
} |
||||
|
||||
/* update mv_cache */ |
||||
for (l=0; l < part_height; l+=4) { |
||||
for (m=0; m < part_width; m+=4) { |
||||
k = scan8[0] + ((m + j) >> 2) + ((l + i) << 1); |
||||
h->mv_cache [0][k][0] = mx; |
||||
h->mv_cache [0][k][1] = my; |
||||
h->ref_cache[0][k] = 1; |
||||
} |
||||
} |
||||
|
||||
svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my); |
||||
} |
||||
} |
||||
|
||||
for (i=0; i < 4; i++) { |
||||
memcpy (s->current_picture.motion_val[0][b_xy + i*h->b_stride], h->mv_cache[0][scan8[0] + 8*i], 4*2*sizeof(int16_t)); |
||||
} |
||||
|
||||
if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48) |
||||
return -1; |
||||
|
||||
cbp = golomb_to_inter_cbp[vlc]; |
||||
mb_type = MB_TYPE_16x16; |
||||
} else if (mb_type == 8) { /* INTRA4x4 */ |
||||
memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t)); |
||||
|
||||
if (s->mb_x > 0) { |
||||
for (i=0; i < 4; i++) { |
||||
h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i]; |
||||
} |
||||
} |
||||
if (s->mb_y > 0) { |
||||
h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4]; |
||||
h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5]; |
||||
h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6]; |
||||
h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3]; |
||||
} |
||||
|
||||
/* decode prediction codes for luma blocks */ |
||||
for (i=0; i < 16; i+=2) { |
||||
vlc = svq3_get_ue_golomb (&s->gb); |
||||
|
||||
if (vlc >= 25) |
||||
return -1; |
||||
|
||||
left = &h->intra4x4_pred_mode_cache[scan8[i] - 1]; |
||||
top = &h->intra4x4_pred_mode_cache[scan8[i] - 8]; |
||||
|
||||
left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]]; |
||||
left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]]; |
||||
|
||||
if (left[1] == -1 || left[2] == -1) |
||||
return -1; |
||||
} |
||||
|
||||
write_back_intra_pred_mode (h); |
||||
check_intra4x4_pred_mode (h); |
||||
|
||||
if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48) |
||||
return -1; |
||||
|
||||
cbp = golomb_to_intra4x4_cbp[vlc]; |
||||
mb_type = MB_TYPE_INTRA4x4; |
||||
} else { /* INTRA16x16 */ |
||||
dir = i_mb_type_info[mb_type - 8].pred_mode; |
||||
dir = (dir >> 1) ^ 3*(dir & 1) ^ 1; |
||||
|
||||
if ((h->intra16x16_pred_mode = check_intra_pred_mode (h, dir)) == -1) |
||||
return -1; |
||||
|
||||
cbp = i_mb_type_info[mb_type - 8].cbp; |
||||
mb_type = MB_TYPE_INTRA16x16; |
||||
} |
||||
|
||||
if (!IS_INTER(mb_type) && s->pict_type != I_TYPE) { |
||||
for (i=0; i < 4; i++) { |
||||
memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); |
||||
} |
||||
} |
||||
if (!IS_INTRA4x4(mb_type)) { |
||||
memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8); |
||||
} |
||||
if (!IS_SKIP(mb_type)) { |
||||
memset (h->mb, 0, 24*16*sizeof(DCTELEM)); |
||||
memset (h->non_zero_count_cache, 0, 8*6*sizeof(uint8_t)); |
||||
} |
||||
|
||||
if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) { |
||||
s->qscale += svq3_get_se_golomb (&s->gb); |
||||
|
||||
if (s->qscale > 31) |
||||
return -1; |
||||
} |
||||
if (IS_INTRA16x16(mb_type)) { |
||||
if (svq3_decode_block (&s->gb, h->mb, 0, 0)) |
||||
return -1; |
||||
} |
||||
|
||||
if (!IS_SKIP(mb_type) && cbp) { |
||||
l = IS_INTRA16x16(mb_type) ? 1 : 0; |
||||
m = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1); |
||||
|
||||
for (i=0; i < 4; i++) { |
||||
if ((cbp & (1 << i))) { |
||||
for (j=0; j < 4; j++) { |
||||
k = l ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j); |
||||
h->non_zero_count_cache[ scan8[k] ] = 1; |
||||
|
||||
if (svq3_decode_block (&s->gb, &h->mb[16*k], l, m)) |
||||
return -1; |
||||
} |
||||
} |
||||
} |
||||
|
||||
if ((cbp & 0x30)) { |
||||
for (i=0; i < 2; ++i) { |
||||
if (svq3_decode_block (&s->gb, &h->mb[16*(16 + 4*i)], 0, 3)) |
||||
return -1; |
||||
} |
||||
|
||||
if ((cbp & 0x20)) { |
||||
for (i=0; i < 8; i++) { |
||||
h->non_zero_count_cache[ scan8[16+i] ] = 1; |
||||
|
||||
if (svq3_decode_block (&s->gb, &h->mb[16*(16 + i)], 1, 1)) |
||||
return -1; |
||||
} |
||||
} |
||||
} |
||||
} |
||||
|
||||
s->current_picture.mb_type[mb_xy] = mb_type; |
||||
|
||||
if (IS_INTRA(mb_type)) { |
||||
h->chroma_pred_mode = check_intra_pred_mode (h, DC_PRED8x8); |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int svq3_decode_frame (AVCodecContext *avctx, |
||||
void *data, int *data_size, |
||||
uint8_t *buf, int buf_size) { |
||||
MpegEncContext *const s = avctx->priv_data; |
||||
H264Context *const h = avctx->priv_data; |
||||
int i; |
||||
|
||||
s->flags = avctx->flags; |
||||
|
||||
if (!s->context_initialized) { |
||||
s->width = (avctx->width + 15) & ~15; |
||||
s->height = (avctx->height + 15) & ~15; |
||||
h->b_stride = (s->width >> 2); |
||||
h->pred4x4[DIAG_DOWN_LEFT_PRED] = pred4x4_down_left_svq3_c; |
||||
h->pred16x16[PLANE_PRED8x8] = pred16x16_plane_svq3_c; |
||||
h->halfpel_flag = 1; |
||||
h->thirdpel_flag = 1; |
||||
h->chroma_qp = 4; |
||||
|
||||
if (MPV_common_init (s) < 0) |
||||
return -1; |
||||
|
||||
alloc_tables (h); |
||||
} |
||||
if (avctx->extradata && avctx->extradata_size >= 115 |
||||
&& !memcmp (avctx->extradata, "stsd", 4)) { |
||||
|
||||
uint8_t *stsd = (uint8_t *) avctx->extradata + 114; |
||||
|
||||
if ((*stsd >> 5) != 7 || avctx->extradata_size >= 118) { |
||||
|
||||
if ((*stsd >> 5) == 7) { |
||||
stsd += 3; /* skip width, height (12 bits each) */ |
||||
} |
||||
|
||||
h->halfpel_flag = (*stsd >> 4) & 1; |
||||
h->thirdpel_flag = (*stsd >> 3) & 1; |
||||
} |
||||
} |
||||
|
||||
if ((buf[0] & 0x9F) != 1) { |
||||
/* TODO: what? */ |
||||
fprintf (stderr, "unsupported header (%02X)\n", buf[0]); |
||||
return -1; |
||||
} else { |
||||
int length = (buf[0] >> 5) & 3; |
||||
int offset = 0; |
||||
|
||||
for (i=0; i < length; i++) { |
||||
offset = (offset << 8) | buf[i + 1]; |
||||
} |
||||
|
||||
if (buf_size < (offset + length + 1) || length == 0) |
||||
return -1; |
||||
|
||||
memcpy (&buf[2], &buf[offset + 2], (length - 1)); |
||||
} |
||||
|
||||
init_get_bits (&s->gb, &buf[2], 8*(buf_size - 2)); |
||||
|
||||
if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3) |
||||
return -1; |
||||
|
||||
s->pict_type = golomb_to_pict_type[i]; |
||||
|
||||
/* unknown fields */ |
||||
get_bits (&s->gb, 1); |
||||
get_bits (&s->gb, 8); |
||||
|
||||
s->qscale = get_bits (&s->gb, 5); |
||||
s->adaptive_quant = get_bits (&s->gb, 1); |
||||
|
||||
/* unknown fields */ |
||||
get_bits (&s->gb, 1); |
||||
get_bits (&s->gb, 1); |
||||
get_bits (&s->gb, 2); |
||||
|
||||
while (get_bits (&s->gb, 1)) { |
||||
get_bits (&s->gb, 8); |
||||
} |
||||
|
||||
/* B-frames are not supported */ |
||||
if (s->pict_type == B_TYPE/* && avctx->hurry_up*/) |
||||
return buf_size; |
||||
|
||||
frame_start (h); |
||||
|
||||
for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) { |
||||
for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) { |
||||
int mb_type = svq3_get_ue_golomb (&s->gb); |
||||
|
||||
if (s->pict_type == I_TYPE) { |
||||
mb_type += 8; |
||||
} |
||||
if (mb_type > 32 || svq3_decode_mb (h, mb_type)) { |
||||
fprintf (stderr, "error while decoding MB %d %d\n", s->mb_x, s->mb_y); |
||||
return -1; |
||||
} |
||||
|
||||
if (mb_type != 0) { |
||||
hl_decode_mb (h); |
||||
} |
||||
} |
||||
} |
||||
|
||||
*(AVFrame *) data = *(AVFrame *) &s->current_picture; |
||||
*data_size = sizeof(AVFrame); |
||||
|
||||
MPV_frame_end(s); |
||||
|
||||
return buf_size; |
||||
} |
||||
|
||||
|
||||
AVCodec svq3_decoder = { |
||||
"svq3", |
||||
CODEC_TYPE_VIDEO, |
||||
CODEC_ID_SVQ3, |
||||
sizeof(H264Context), |
||||
decode_init, |
||||
NULL, |
||||
decode_end, |
||||
svq3_decode_frame, |
||||
CODEC_CAP_DR1, |
||||
}; |
||||
Loading…
Reference in new issue