--- /dev/null
+/*
+ * 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,
+};
projects / synfig.git / blobdiff