X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_03%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fsvq3.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_03%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fsvq3.c;h=8f9f545e77d7b8efdb651cb130e1feee1c9cd75e;hb=2362dce2bb8c6a5fd5f3bd049975c3d89411f5d3;hp=0000000000000000000000000000000000000000;hpb=6f41e88a004056081fbf3e45c4eb9780cc08cd91;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/svq3.c b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/svq3.c new file mode 100644 index 0000000..8f9f545 --- /dev/null +++ b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/svq3.c @@ -0,0 +1,969 @@ +/* + * Copyright (c) 2003 The FFmpeg Project. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * + * How to use this decoder: + * SVQ3 data is transported within Apple Quicktime files. Quicktime files + * have stsd atoms to describe media trak properties. A stsd atom for a + * video trak contains 1 or more ImageDescription atoms. These atoms begin + * with the 4-byte length of the atom followed by the codec fourcc. Some + * decoders need information in this atom to operate correctly. Such + * is the case with SVQ3. In order to get the best use out of this decoder, + * the calling app must make the SVQ3 ImageDescription atom available + * via the AVCodecContext's extradata[_size] field: + * + * AVCodecContext.extradata = pointer to ImageDescription, first characters + * are expected to be 'S', 'V', 'Q', and '3', NOT the 4-byte atom length + * AVCodecContext.extradata_size = size of ImageDescription atom memory + * buffer (which will be the same as the ImageDescription atom size field + * from the QT file, minus 4 bytes since the length is missing) + * + * You will know you have these parameters passed correctly when the decoder + * correctly decodes this file: + * ftp://ftp.mplayerhq.hu/MPlayer/samples/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov + * + */ + +/** + * @file svq3.c + * svq3 decoder. + */ + +#define FULLPEL_MODE 1 +#define HALFPEL_MODE 2 +#define THIRDPEL_MODE 3 +#define PREDICT_MODE 4 + +/* dual scan (from some older h264 draft) + o-->o-->o o + | /| + o o o / o + | / | |/ | + o o o o + / + o-->o-->o-->o +*/ +static const uint8_t svq3_scan[16]={ + 0+0*4, 1+0*4, 2+0*4, 2+1*4, + 2+2*4, 3+0*4, 3+1*4, 3+2*4, + 0+1*4, 0+2*4, 1+1*4, 1+2*4, + 0+3*4, 1+3*4, 2+3*4, 3+3*4, +}; + +static const uint8_t svq3_pred_0[25][2] = { + { 0, 0 }, + { 1, 0 }, { 0, 1 }, + { 0, 2 }, { 1, 1 }, { 2, 0 }, + { 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 }, + { 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 }, + { 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 }, + { 2, 4 }, { 3, 3 }, { 4, 2 }, + { 4, 3 }, { 3, 4 }, + { 4, 4 } +}; + +static const int8_t svq3_pred_1[6][6][5] = { + { { 2,-1,-1,-1,-1 }, { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, + { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, { 1, 2,-1,-1,-1 } }, + { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 }, + { 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } }, + { { 2, 0,-1,-1,-1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 }, + { 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } }, + { { 2, 0,-1,-1,-1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 }, + { 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } }, + { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 }, + { 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } }, + { { 0, 2,-1,-1,-1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 }, + { 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } }, +}; + +static const struct { uint8_t run; uint8_t level; } svq3_dct_tables[2][16] = { + { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 }, + { 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } }, + { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 }, + { 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } } +}; + +static const uint32_t svq3_dequant_coeff[32] = { + 3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718, + 9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873, + 24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683, + 61694, 68745, 77615, 89113,100253,109366,126635,141533 +}; + + +static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp){ + const int qmul= svq3_dequant_coeff[qp]; +#define stride 16 + int i; + int temp[16]; + static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride}; + static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride}; + + for(i=0; i<4; i++){ + const int offset= y_offset[i]; + const int z0= 13*(block[offset+stride*0] + block[offset+stride*4]); + const int z1= 13*(block[offset+stride*0] - block[offset+stride*4]); + const int z2= 7* block[offset+stride*1] - 17*block[offset+stride*5]; + const int z3= 17* block[offset+stride*1] + 7*block[offset+stride*5]; + + temp[4*i+0]= z0+z3; + temp[4*i+1]= z1+z2; + temp[4*i+2]= z1-z2; + temp[4*i+3]= z0-z3; + } + + for(i=0; i<4; i++){ + const int offset= x_offset[i]; + const int z0= 13*(temp[4*0+i] + temp[4*2+i]); + const int z1= 13*(temp[4*0+i] - temp[4*2+i]); + const int z2= 7* temp[4*1+i] - 17*temp[4*3+i]; + const int z3= 17* temp[4*1+i] + 7*temp[4*3+i]; + + block[stride*0 +offset]= ((z0 + z3)*qmul + 0x80000)>>20; + block[stride*2 +offset]= ((z1 + z2)*qmul + 0x80000)>>20; + block[stride*8 +offset]= ((z1 - z2)*qmul + 0x80000)>>20; + block[stride*10+offset]= ((z0 - z3)*qmul + 0x80000)>>20; + } +} +#undef stride + +static void svq3_add_idct_c (uint8_t *dst, DCTELEM *block, int stride, int qp, int dc){ + const int qmul= svq3_dequant_coeff[qp]; + int i; + uint8_t *cm = cropTbl + MAX_NEG_CROP; + + if (dc) { + dc = 13*13*((dc == 1) ? 1538*block[0] : ((qmul*(block[0] >> 3)) / 2)); + block[0] = 0; + } + + for (i=0; i < 4; i++) { + const int z0= 13*(block[0 + 4*i] + block[2 + 4*i]); + const int z1= 13*(block[0 + 4*i] - block[2 + 4*i]); + const int z2= 7* block[1 + 4*i] - 17*block[3 + 4*i]; + const int z3= 17* block[1 + 4*i] + 7*block[3 + 4*i]; + + block[0 + 4*i]= z0 + z3; + block[1 + 4*i]= z1 + z2; + block[2 + 4*i]= z1 - z2; + block[3 + 4*i]= z0 - z3; + } + + for (i=0; i < 4; i++) { + const int z0= 13*(block[i + 4*0] + block[i + 4*2]); + const int z1= 13*(block[i + 4*0] - block[i + 4*2]); + const int z2= 7* block[i + 4*1] - 17*block[i + 4*3]; + const int z3= 17* block[i + 4*1] + 7*block[i + 4*3]; + const int rr= (dc + 0x80000); + + dst[i + stride*0]= cm[ dst[i + stride*0] + (((z0 + z3)*qmul + rr) >> 20) ]; + dst[i + stride*1]= cm[ dst[i + stride*1] + (((z1 + z2)*qmul + rr) >> 20) ]; + dst[i + stride*2]= cm[ dst[i + stride*2] + (((z1 - z2)*qmul + rr) >> 20) ]; + dst[i + stride*3]= cm[ dst[i + stride*3] + (((z0 - z3)*qmul + rr) >> 20) ]; + } +} + +static void pred4x4_down_left_svq3_c(uint8_t *src, uint8_t *topright, int stride){ + LOAD_TOP_EDGE + LOAD_LEFT_EDGE + const __attribute__((unused)) int unu0= t0; + const __attribute__((unused)) int unu1= l0; + + src[0+0*stride]=(l1 + t1)>>1; + src[1+0*stride]= + src[0+1*stride]=(l2 + t2)>>1; + src[2+0*stride]= + src[1+1*stride]= + src[0+2*stride]= + src[3+0*stride]= + src[2+1*stride]= + src[1+2*stride]= + src[0+3*stride]= + src[3+1*stride]= + src[2+2*stride]= + src[1+3*stride]= + src[3+2*stride]= + src[2+3*stride]= + src[3+3*stride]=(l3 + t3)>>1; +} + +static void pred16x16_plane_svq3_c(uint8_t *src, int stride){ + pred16x16_plane_compat_c(src, stride, 1); +} + +static inline int svq3_decode_block (GetBitContext *gb, DCTELEM *block, + int index, const int type) { + + static const uint8_t *const scan_patterns[4] = + { luma_dc_zigzag_scan, zigzag_scan, svq3_scan, chroma_dc_scan }; + + int run, level, sign, vlc, limit; + const int intra = (3 * type) >> 2; + const uint8_t *const scan = scan_patterns[type]; + + for (limit=(16 >> intra); index < 16; index=limit, limit+=8) { + for (; (vlc = svq3_get_ue_golomb (gb)) != 0; index++) { + + if (vlc == INVALID_VLC) + return -1; + + sign = (vlc & 0x1) - 1; + vlc = (vlc + 1) >> 1; + + if (type == 3) { + if (vlc < 3) { + run = 0; + level = vlc; + } else if (vlc < 4) { + run = 1; + level = 1; + } else { + run = (vlc & 0x3); + level = ((vlc + 9) >> 2) - run; + } + } else { + if (vlc < 16) { + run = svq3_dct_tables[intra][vlc].run; + level = svq3_dct_tables[intra][vlc].level; + } else if (intra) { + run = (vlc & 0x7); + level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1))); + } else { + run = (vlc & 0xF); + level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0))); + } + } + + if ((index += run) >= limit) + return -1; + + block[scan[index]] = (level ^ sign) - sign; + } + + if (type != 2) { + break; + } + } + + return 0; +} + +static inline void svq3_mc_dir_part (MpegEncContext *s, + int x, int y, int width, int height, + int mx, int my, int dxy, + int thirdpel, int dir, int avg) { + + const Picture *pic = (dir == 0) ? &s->last_picture : &s->next_picture; + uint8_t *src, *dest; + int i, emu = 0; + int blocksize= 2 - (width>>3); //16->0, 8->1, 4->2 + + mx += x; + my += y; + + if (mx < 0 || mx >= (s->h_edge_pos - width - 1) || + my < 0 || my >= (s->v_edge_pos - height - 1)) { + + if ((s->flags & CODEC_FLAG_EMU_EDGE)) { + emu = 1; + } + + mx = clip (mx, -16, (s->h_edge_pos - width + 15)); + my = clip (my, -16, (s->v_edge_pos - height + 15)); + } + + /* form component predictions */ + dest = s->current_picture.data[0] + x + y*s->linesize; + src = pic->data[0] + mx + my*s->linesize; + + if (emu) { + ff_emulated_edge_mc (s->edge_emu_buffer, src, s->linesize, (width + 1), (height + 1), + mx, my, s->h_edge_pos, s->v_edge_pos); + src = s->edge_emu_buffer; + } + if(thirdpel) + (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->linesize, width, height); + else + (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->linesize, height); + + if (!(s->flags & CODEC_FLAG_GRAY)) { + mx = (mx + (mx < (int) x)) >> 1; + my = (my + (my < (int) y)) >> 1; + width = (width >> 1); + height = (height >> 1); + blocksize++; + + for (i=1; i < 3; i++) { + dest = s->current_picture.data[i] + (x >> 1) + (y >> 1)*s->uvlinesize; + src = pic->data[i] + mx + my*s->uvlinesize; + + if (emu) { + ff_emulated_edge_mc (s->edge_emu_buffer, src, s->uvlinesize, (width + 1), (height + 1), + mx, my, (s->h_edge_pos >> 1), (s->v_edge_pos >> 1)); + src = s->edge_emu_buffer; + } + if(thirdpel) + (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->uvlinesize, width, height); + else + (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->uvlinesize, height); + } + } +} + +static inline int svq3_mc_dir (H264Context *h, int size, int mode, int dir, int avg) { + + int i, j, k, mx, my, dx, dy, x, y; + MpegEncContext *const s = (MpegEncContext *) h; + const int part_width = ((size & 5) == 4) ? 4 : 16 >> (size & 1); + const int part_height = 16 >> ((unsigned) (size + 1) / 3); + const int extra_width = (mode == PREDICT_MODE) ? -16*6 : 0; + const int h_edge_pos = 6*(s->h_edge_pos - part_width ) - extra_width; + const int v_edge_pos = 6*(s->v_edge_pos - part_height) - extra_width; + + for (i=0; i < 16; i+=part_height) { + for (j=0; j < 16; j+=part_width) { + const int b_xy = (4*s->mb_x+(j>>2)) + (4*s->mb_y+(i>>2))*h->b_stride; + int dxy; + x = 16*s->mb_x + j; + y = 16*s->mb_y + i; + k = ((j>>2)&1) + ((i>>1)&2) + ((j>>1)&4) + (i&8); + + if (mode != PREDICT_MODE) { + pred_motion (h, k, (part_width >> 2), dir, 1, &mx, &my); + } else { + mx = s->next_picture.motion_val[0][b_xy][0]<<1; + my = s->next_picture.motion_val[0][b_xy][1]<<1; + + if (dir == 0) { + mx = ((mx * h->frame_num_offset) / h->prev_frame_num_offset + 1)>>1; + my = ((my * h->frame_num_offset) / h->prev_frame_num_offset + 1)>>1; + } else { + mx = ((mx * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset + 1)>>1; + my = ((my * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset + 1)>>1; + } + } + + /* clip motion vector prediction to frame border */ + mx = clip (mx, extra_width - 6*x, h_edge_pos - 6*x); + my = clip (my, extra_width - 6*y, v_edge_pos - 6*y); + + /* get (optional) motion vector differential */ + if (mode == PREDICT_MODE) { + dx = dy = 0; + } else { + 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 == THIRDPEL_MODE) { + int fx, fy; + mx = ((mx + 1)>>1) + dx; + my = ((my + 1)>>1) + dy; + fx= ((unsigned)(mx + 0x3000))/3 - 0x1000; + fy= ((unsigned)(my + 0x3000))/3 - 0x1000; + dxy= (mx - 3*fx) + 4*(my - 3*fy); + + svq3_mc_dir_part (s, x, y, part_width, part_height, fx, fy, dxy, 1, dir, avg); + mx += mx; + my += my; + } else if (mode == HALFPEL_MODE || mode == PREDICT_MODE) { + mx = ((unsigned)(mx + 1 + 0x3000))/3 + dx - 0x1000; + my = ((unsigned)(my + 1 + 0x3000))/3 + dy - 0x1000; + dxy= (mx&1) + 2*(my&1); + + svq3_mc_dir_part (s, x, y, part_width, part_height, mx>>1, my>>1, dxy, 0, dir, avg); + mx *= 3; + my *= 3; + } else { + mx = ((unsigned)(mx + 3 + 0x6000))/6 + dx - 0x1000; + my = ((unsigned)(my + 3 + 0x6000))/6 + dy - 0x1000; + + svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my, 0, 0, dir, avg); + mx *= 6; + my *= 6; + } + + /* update mv_cache */ + if (mode != PREDICT_MODE) { + int32_t mv = pack16to32(mx,my); + + if (part_height == 8 && i < 8) { + *(int32_t *) h->mv_cache[dir][scan8[k] + 1*8] = mv; + + if (part_width == 8 && j < 8) { + *(int32_t *) h->mv_cache[dir][scan8[k] + 1 + 1*8] = mv; + } + } + if (part_width == 8 && j < 8) { + *(int32_t *) h->mv_cache[dir][scan8[k] + 1] = mv; + } + if (part_width == 4 || part_height == 4) { + *(int32_t *) h->mv_cache[dir][scan8[k]] = mv; + } + } + + /* write back motion vectors */ + fill_rectangle(s->current_picture.motion_val[dir][b_xy], part_width>>2, part_height>>2, h->b_stride, pack16to32(mx,my), 4); + } + } + + return 0; +} + +static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { + int i, j, k, m, dir, mode; + int cbp = 0; + uint32_t vlc; + int8_t *top, *left; + MpegEncContext *const s = (MpegEncContext *) h; + const int mb_xy = s->mb_x + s->mb_y*s->mb_stride; + const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride; + + h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF; + h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF; + h->topright_samples_available = 0xFFFF; + + if (mb_type == 0) { /* SKIP */ + if (s->pict_type == P_TYPE || s->next_picture.mb_type[mb_xy] == -1) { + svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 0, 0); + + if (s->pict_type == B_TYPE) { + svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 1, 1); + } + + mb_type = MB_TYPE_SKIP; + } else { + svq3_mc_dir (h, s->next_picture.mb_type[mb_xy], PREDICT_MODE, 0, 0); + svq3_mc_dir (h, s->next_picture.mb_type[mb_xy], PREDICT_MODE, 1, 1); + + mb_type = MB_TYPE_16x16; + } + } else if (mb_type < 8) { /* INTER */ + if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) { + mode = THIRDPEL_MODE; + } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) { + mode = HALFPEL_MODE; + } else { + mode = FULLPEL_MODE; + } + + /* fill caches */ + /* note ref_cache should contain here: + ???????? + ???11111 + N??11111 + N??11111 + N??11111 + N + */ + + for (m=0; m < 2; m++) { + if (s->mb_x > 0 && h->intra4x4_pred_mode[mb_xy - 1][0] != -1) { + for (i=0; i < 4; i++) { + *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - 1 + i*h->b_stride]; + } + } else { + for (i=0; i < 4; i++) { + *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = 0; + } + } + if (s->mb_y > 0) { + memcpy (h->mv_cache[m][scan8[0] - 1*8], s->current_picture.motion_val[m][b_xy - h->b_stride], 4*2*sizeof(int16_t)); + memset (&h->ref_cache[m][scan8[0] - 1*8], (h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1, 4); + + if (s->mb_x < (s->mb_width - 1)) { + *(uint32_t *) h->mv_cache[m][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride + 4]; + h->ref_cache[m][scan8[0] + 4 - 1*8] = + (h->intra4x4_pred_mode[mb_xy - s->mb_stride + 1][0] == -1 || + h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1; + }else + h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE; + if (s->mb_x > 0) { + *(uint32_t *) h->mv_cache[m][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride - 1]; + h->ref_cache[m][scan8[0] - 1 - 1*8] = (h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] == -1) ? PART_NOT_AVAILABLE : 1; + }else + h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE; + }else + memset (&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8); + + if (s->pict_type != B_TYPE) + break; + } + + /* decode motion vector(s) and form prediction(s) */ + if (s->pict_type == P_TYPE) { + svq3_mc_dir (h, (mb_type - 1), mode, 0, 0); + } else { /* B_TYPE */ + if (mb_type != 2) { + svq3_mc_dir (h, 0, mode, 0, 0); + } else { + 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 (mb_type != 1) { + svq3_mc_dir (h, 0, mode, 1, (mb_type == 3)); + } else { + for (i=0; i < 4; i++) { + memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); + } + } + } + + mb_type = MB_TYPE_16x16; + } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */ + memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t)); + + if (mb_type == 8) { + 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 (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) { + h->left_samples_available = 0x5F5F; + } + } + 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]; + + if (h->intra4x4_pred_mode_cache[4+8*0] == -1) { + h->top_samples_available = 0x33FF; + } + } + + /* 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; + } + } else { /* mb_type == 33, DC_128_PRED block type */ + for (i=0; i < 4; i++) { + memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4); + } + } + + write_back_intra_pred_mode (h); + + if (mb_type == 8) { + check_intra4x4_pred_mode (h); + + h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF; + h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF; + } else { + for (i=0; i < 4; i++) { + memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4); + } + + h->top_samples_available = 0x33FF; + h->left_samples_available = 0x5F5F; + } + + 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 (s->pict_type == B_TYPE) { + for (i=0; i < 4; i++) { + memset (s->current_picture.motion_val[1][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) || s->pict_type == B_TYPE) { + memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t)); + s->dsp.clear_blocks(h->mb); + } + + if (!IS_INTRA16x16(mb_type) && (!IS_SKIP(mb_type) || s->pict_type == B_TYPE)) { + if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48) + return -1; + + cbp = IS_INTRA(mb_type) ? golomb_to_intra4x4_cbp[vlc] : golomb_to_inter_cbp[vlc]; + } + 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 (cbp) { + const int index = IS_INTRA16x16(mb_type) ? 1 : 0; + const int type = ((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 = index ? ((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], index, type)) + 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_slice_header (H264Context *h) { + MpegEncContext *const s = (MpegEncContext *) h; + const int mb_xy = s->mb_x + s->mb_y*s->mb_stride; + int i, header; + + header = get_bits (&s->gb, 8); + + if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) { + /* TODO: what? */ + fprintf (stderr, "unsupported slice header (%02X)\n", header); + return -1; + } else { + int length = (header >> 5) & 3; + + h->next_slice_index = s->gb.index + 8*show_bits (&s->gb, 8*length) + 8*length; + + if (h->next_slice_index > s->gb.size_in_bits) + return -1; + + s->gb.size_in_bits = h->next_slice_index - 8*(length - 1); + s->gb.index += 8; + + if (length > 0) { + memcpy ((uint8_t *) &s->gb.buffer[s->gb.index >> 3], + &s->gb.buffer[s->gb.size_in_bits >> 3], (length - 1)); + } + } + + if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3) + return -1; + + h->slice_type = golomb_to_pict_type[i]; + + if ((header & 0x9F) == 2) { + i = (s->mb_num < 64) ? 6 : (1 + av_log2 (s->mb_num - 1)); + s->mb_skip_run = get_bits (&s->gb, i) - (s->mb_x + (s->mb_y * s->mb_width)); + } else { + get_bits1 (&s->gb); + s->mb_skip_run = 0; + } + + h->slice_num = get_bits (&s->gb, 8); + s->qscale = get_bits (&s->gb, 5); + s->adaptive_quant = get_bits1 (&s->gb); + + /* unknown fields */ + get_bits1 (&s->gb); + + if (h->unknown_svq3_flag) { + get_bits1 (&s->gb); + } + + get_bits1 (&s->gb); + get_bits (&s->gb, 2); + + while (get_bits1 (&s->gb)) { + get_bits (&s->gb, 8); + } + + /* reset intra predictors and invalidate motion vector references */ + if (s->mb_x > 0) { + memset (h->intra4x4_pred_mode[mb_xy - 1], -1, 4*sizeof(int8_t)); + memset (h->intra4x4_pred_mode[mb_xy - s->mb_x], -1, 8*sizeof(int8_t)*s->mb_x); + } + if (s->mb_y > 0) { + memset (h->intra4x4_pred_mode[mb_xy - s->mb_stride], -1, 8*sizeof(int8_t)*(s->mb_width - s->mb_x)); + + if (s->mb_x > 0) { + h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] = -1; + } + } + + 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 m, mb_type; + + *data_size = 0; + + s->flags = avctx->flags; + + if (!s->context_initialized) { + s->width = avctx->width; + s->height = avctx->height; + 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->unknown_svq3_flag = 0; + h->chroma_qp = 4; + + if (MPV_common_init (s) < 0) + return -1; + + h->b_stride = 4*s->mb_width; + + alloc_tables (h); + + if (avctx->extradata && avctx->extradata_size >= 0x64 + && !memcmp (avctx->extradata, "SVQ3", 4)) { + + GetBitContext gb; + + init_get_bits (&gb, (uint8_t *) avctx->extradata + 0x62, + 8*(avctx->extradata_size - 0x62)); + + /* 'frame size code' and optional 'width, height' */ + if (get_bits (&gb, 3) == 7) { + get_bits (&gb, 12); + get_bits (&gb, 12); + } + + h->halfpel_flag = get_bits1 (&gb); + h->thirdpel_flag = get_bits1 (&gb); + + /* unknown fields */ + get_bits1 (&gb); + get_bits1 (&gb); + get_bits1 (&gb); + get_bits1 (&gb); + + s->low_delay = get_bits1 (&gb); + + /* unknown field */ + get_bits1 (&gb); + + while (get_bits1 (&gb)) { + get_bits (&gb, 8); + } + + h->unknown_svq3_flag = get_bits1 (&gb); + avctx->has_b_frames = !s->low_delay; + } + } + + /* special case for last picture */ + if (buf_size == 0) { + if (s->next_picture_ptr && !s->low_delay) { + *(AVFrame *) data = *(AVFrame *) &s->next_picture; + *data_size = sizeof(AVFrame); + } + return 0; + } + + init_get_bits (&s->gb, buf, 8*buf_size); + + s->mb_x = s->mb_y = 0; + + if (svq3_decode_slice_header (h)) + return -1; + + s->pict_type = h->slice_type; + s->picture_number = h->slice_num; + + if(avctx->debug&FF_DEBUG_PICT_INFO){ + printf("%c hpel:%d, tpel:%d aqp:%d qp:%d\n", + av_get_pict_type_char(s->pict_type), h->halfpel_flag, h->thirdpel_flag, + s->adaptive_quant, s->qscale + ); + } + + /* for hurry_up==5 */ + s->current_picture.pict_type = s->pict_type; + s->current_picture.key_frame = (s->pict_type == I_TYPE); + + /* skip b frames if we dont have reference frames */ + if (s->last_picture_ptr == NULL && s->pict_type == B_TYPE) return 0; + /* skip b frames if we are in a hurry */ + if (avctx->hurry_up && s->pict_type == B_TYPE) return 0; + /* skip everything if we are in a hurry >= 5 */ + if (avctx->hurry_up >= 5) return 0; + + if (s->next_p_frame_damaged) { + if (s->pict_type == B_TYPE) + return 0; + else + s->next_p_frame_damaged = 0; + } + + frame_start (h); + + if (s->pict_type == B_TYPE) { + h->frame_num_offset = (h->slice_num - h->prev_frame_num); + + if (h->frame_num_offset < 0) { + h->frame_num_offset += 256; + } + if (h->frame_num_offset == 0 || h->frame_num_offset >= h->prev_frame_num_offset) { + printf ("error in B-frame picture id\n"); + return -1; + } + } else { + h->prev_frame_num = h->frame_num; + h->frame_num = h->slice_num; + h->prev_frame_num_offset = (h->frame_num - h->prev_frame_num); + + if (h->prev_frame_num_offset < 0) { + h->prev_frame_num_offset += 256; + } + } + + for(m=0; m<2; m++){ + int i; + for(i=0; i<4; i++){ + int j; + for(j=-1; j<4; j++) + h->ref_cache[m][scan8[0] + 8*i + j]= 1; + h->ref_cache[m][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE; + } + } + + 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++) { + + if ( (s->gb.index + 7) >= s->gb.size_in_bits && + ((s->gb.index & 7) == 0 || show_bits (&s->gb, (-s->gb.index & 7)) == 0)) { + + s->gb.index = h->next_slice_index; + s->gb.size_in_bits = 8*buf_size; + + if (svq3_decode_slice_header (h)) + return -1; + + /* TODO: support s->mb_skip_run */ + } + + mb_type = svq3_get_ue_golomb (&s->gb); + + if (s->pict_type == I_TYPE) { + mb_type += 8; + } else if (s->pict_type == B_TYPE && mb_type >= 4) { + mb_type += 4; + } + if (mb_type > 33 || 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); + } + + if (s->pict_type != B_TYPE && !s->low_delay) { + s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] = + (s->pict_type == P_TYPE && mb_type < 8) ? (mb_type - 1) : -1; + } + } + + ff_draw_horiz_band(s, 16*s->mb_y, 16); + } + + MPV_frame_end(s); + + if (s->pict_type == B_TYPE || s->low_delay) { + *(AVFrame *) data = *(AVFrame *) &s->current_picture; + } else { + *(AVFrame *) data = *(AVFrame *) &s->last_picture; + } + + avctx->frame_number = s->picture_number - 1; + + /* dont output the last pic after seeking */ + if (s->last_picture_ptr || s->low_delay) { + *data_size = sizeof(AVFrame); + } + + 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_DRAW_HORIZ_BAND | CODEC_CAP_DR1, +};