| /* |
| * RoQ Video Encoder. |
| * |
| * Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com> |
| * Copyright (C) 2004-2007 Eric Lasota |
| * Based on RoQ specs (C) 2001 Tim Ferguson |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file libavcodec/roqvideoenc.c |
| * id RoQ encoder by Vitor. Based on the Switchblade3 library and the |
| * Switchblade3 FFmpeg glue by Eric Lasota. |
| */ |
| |
| /* |
| * COSTS: |
| * Level 1: |
| * SKIP - 2 bits |
| * MOTION - 2 + 8 bits |
| * CODEBOOK - 2 + 8 bits |
| * SUBDIVIDE - 2 + combined subcel cost |
| * |
| * Level 2: |
| * SKIP - 2 bits |
| * MOTION - 2 + 8 bits |
| * CODEBOOK - 2 + 8 bits |
| * SUBDIVIDE - 2 + 4*8 bits |
| * |
| * Maximum cost: 138 bits per cel |
| * |
| * Proper evaluation requires LCD fraction comparison, which requires |
| * Squared Error (SE) loss * savings increase |
| * |
| * Maximum savings increase: 136 bits |
| * Maximum SE loss without overflow: 31580641 |
| * Components in 8x8 supercel: 192 |
| * Maximum SE precision per component: 164482 |
| * >65025, so no truncation is needed (phew) |
| */ |
| |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "roqvideo.h" |
| #include "bytestream.h" |
| #include "elbg.h" |
| #include "mathops.h" |
| |
| #define CHROMA_BIAS 1 |
| |
| /** |
| * Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a |
| * Quake 3 bug. |
| */ |
| #define MAX_CBS_4x4 255 |
| |
| #define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks. |
| |
| /* The cast is useful when multiplying it by INT_MAX */ |
| #define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE) |
| |
| /* Macroblock support functions */ |
| static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3]) |
| { |
| memcpy(u , cell->y, 4); |
| memset(u+4, cell->u, 4); |
| memset(u+8, cell->v, 4); |
| } |
| |
| static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3]) |
| { |
| int i,cp; |
| static const int offsets[4] = {0, 2, 8, 10}; |
| |
| for (cp=0; cp<3; cp++) |
| for (i=0; i<4; i++) { |
| u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ]; |
| u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1]; |
| u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2]; |
| u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3]; |
| } |
| } |
| |
| |
| static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64]) |
| { |
| int x,y,cp; |
| |
| for(cp=0; cp<3; cp++) |
| for(y=0; y<8; y++) |
| for(x=0; x<8; x++) |
| *u++ = base[(y/2)*4 + (x/2) + 16*cp]; |
| } |
| |
| static inline int square(int x) |
| { |
| return x*x; |
| } |
| |
| static inline int eval_sse(uint8_t *a, uint8_t *b, int count) |
| { |
| int diff=0; |
| |
| while(count--) |
| diff += square(*b++ - *a++); |
| |
| return diff; |
| } |
| |
| // FIXME Could use DSPContext.sse, but it is not so speed critical (used |
| // just for motion estimation). |
| static int block_sse(uint8_t **buf1, uint8_t **buf2, int x1, int y1, int x2, |
| int y2, int *stride1, int *stride2, int size) |
| { |
| int i, k; |
| int sse=0; |
| |
| for (k=0; k<3; k++) { |
| int bias = (k ? CHROMA_BIAS : 4); |
| for (i=0; i<size; i++) |
| sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1, |
| buf2[k] + (y2+i)*stride2[k] + x2, size); |
| } |
| |
| return sse; |
| } |
| |
| static int eval_motion_dist(RoqContext *enc, int x, int y, motion_vect vect, |
| int size) |
| { |
| int mx=vect.d[0]; |
| int my=vect.d[1]; |
| |
| if (mx < -7 || mx > 7) |
| return INT_MAX; |
| |
| if (my < -7 || my > 7) |
| return INT_MAX; |
| |
| mx += x; |
| my += y; |
| |
| if ((unsigned) mx > enc->width-size || (unsigned) my > enc->height-size) |
| return INT_MAX; |
| |
| return block_sse(enc->frame_to_enc->data, enc->last_frame->data, x, y, |
| mx, my, |
| enc->frame_to_enc->linesize, enc->last_frame->linesize, |
| size); |
| } |
| |
| /** |
| * Returns distortion between two macroblocks |
| */ |
| static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size) |
| { |
| int cp, sdiff=0; |
| |
| for(cp=0;cp<3;cp++) { |
| int bias = (cp ? CHROMA_BIAS : 4); |
| sdiff += bias*eval_sse(a, b, size*size); |
| a += size*size; |
| b += size*size; |
| } |
| |
| return sdiff; |
| } |
| |
| typedef struct |
| { |
| int eval_dist[4]; |
| int best_bit_use; |
| int best_coding; |
| |
| int subCels[4]; |
| motion_vect motion; |
| int cbEntry; |
| } SubcelEvaluation; |
| |
| typedef struct |
| { |
| int eval_dist[4]; |
| int best_coding; |
| |
| SubcelEvaluation subCels[4]; |
| |
| motion_vect motion; |
| int cbEntry; |
| |
| int sourceX, sourceY; |
| } CelEvaluation; |
| |
| typedef struct |
| { |
| int numCB4; |
| int numCB2; |
| int usedCB2[MAX_CBS_2x2]; |
| int usedCB4[MAX_CBS_4x4]; |
| uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3]; |
| uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3]; |
| uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3]; |
| } RoqCodebooks; |
| |
| /** |
| * Temporary vars |
| */ |
| typedef struct RoqTempData |
| { |
| CelEvaluation *cel_evals; |
| |
| int f2i4[MAX_CBS_4x4]; |
| int i2f4[MAX_CBS_4x4]; |
| int f2i2[MAX_CBS_2x2]; |
| int i2f2[MAX_CBS_2x2]; |
| |
| int mainChunkSize; |
| |
| int numCB4; |
| int numCB2; |
| |
| RoqCodebooks codebooks; |
| |
| int *closest_cb2; |
| int used_option[4]; |
| } RoqTempdata; |
| |
| /** |
| * Initializes cel evaluators and sets their source coordinates |
| */ |
| static void create_cel_evals(RoqContext *enc, RoqTempdata *tempData) |
| { |
| int n=0, x, y, i; |
| |
| tempData->cel_evals = av_malloc(enc->width*enc->height/64 * sizeof(CelEvaluation)); |
| |
| /* Map to the ROQ quadtree order */ |
| for (y=0; y<enc->height; y+=16) |
| for (x=0; x<enc->width; x+=16) |
| for(i=0; i<4; i++) { |
| tempData->cel_evals[n ].sourceX = x + (i&1)*8; |
| tempData->cel_evals[n++].sourceY = y + (i&2)*4; |
| } |
| } |
| |
| /** |
| * Get macroblocks from parts of the image |
| */ |
| static void get_frame_mb(AVFrame *frame, int x, int y, uint8_t mb[], int dim) |
| { |
| int i, j, cp; |
| |
| for (cp=0; cp<3; cp++) { |
| int stride = frame->linesize[cp]; |
| for (i=0; i<dim; i++) |
| for (j=0; j<dim; j++) |
| *mb++ = frame->data[cp][(y+i)*stride + x + j]; |
| } |
| } |
| |
| /** |
| * Find the codebook with the lowest distortion from an image |
| */ |
| static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB, |
| int *outIndex, int dim) |
| { |
| int i, lDiff = INT_MAX, pick=0; |
| |
| /* Diff against the others */ |
| for (i=0; i<numCB; i++) { |
| int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim); |
| if (diff < lDiff) { |
| lDiff = diff; |
| pick = i; |
| } |
| } |
| |
| *outIndex = pick; |
| return lDiff; |
| } |
| |
| #define EVAL_MOTION(MOTION) \ |
| do { \ |
| diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \ |
| \ |
| if (diff < lowestdiff) { \ |
| lowestdiff = diff; \ |
| bestpick = MOTION; \ |
| } \ |
| } while(0) |
| |
| static void motion_search(RoqContext *enc, int blocksize) |
| { |
| static const motion_vect offsets[8] = { |
| {{ 0,-1}}, |
| {{ 0, 1}}, |
| {{-1, 0}}, |
| {{ 1, 0}}, |
| {{-1, 1}}, |
| {{ 1,-1}}, |
| {{-1,-1}}, |
| {{ 1, 1}}, |
| }; |
| |
| int diff, lowestdiff, oldbest; |
| int off[3]; |
| motion_vect bestpick = {{0,0}}; |
| int i, j, k, offset; |
| |
| motion_vect *last_motion; |
| motion_vect *this_motion; |
| motion_vect vect, vect2; |
| |
| int max=(enc->width/blocksize)*enc->height/blocksize; |
| |
| if (blocksize == 4) { |
| last_motion = enc->last_motion4; |
| this_motion = enc->this_motion4; |
| } else { |
| last_motion = enc->last_motion8; |
| this_motion = enc->this_motion8; |
| } |
| |
| for (i=0; i<enc->height; i+=blocksize) |
| for (j=0; j<enc->width; j+=blocksize) { |
| lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}}, |
| blocksize); |
| bestpick.d[0] = 0; |
| bestpick.d[1] = 0; |
| |
| if (blocksize == 4) |
| EVAL_MOTION(enc->this_motion8[(i/8)*(enc->width/8) + j/8]); |
| |
| offset = (i/blocksize)*enc->width/blocksize + j/blocksize; |
| if (offset < max && offset >= 0) |
| EVAL_MOTION(last_motion[offset]); |
| |
| offset++; |
| if (offset < max && offset >= 0) |
| EVAL_MOTION(last_motion[offset]); |
| |
| offset = (i/blocksize + 1)*enc->width/blocksize + j/blocksize; |
| if (offset < max && offset >= 0) |
| EVAL_MOTION(last_motion[offset]); |
| |
| off[0]= (i/blocksize)*enc->width/blocksize + j/blocksize - 1; |
| off[1]= off[0] - enc->width/blocksize + 1; |
| off[2]= off[1] + 1; |
| |
| if (i) { |
| |
| for(k=0; k<2; k++) |
| vect.d[k]= mid_pred(this_motion[off[0]].d[k], |
| this_motion[off[1]].d[k], |
| this_motion[off[2]].d[k]); |
| |
| EVAL_MOTION(vect); |
| for(k=0; k<3; k++) |
| EVAL_MOTION(this_motion[off[k]]); |
| } else if(j) |
| EVAL_MOTION(this_motion[off[0]]); |
| |
| vect = bestpick; |
| |
| oldbest = -1; |
| while (oldbest != lowestdiff) { |
| oldbest = lowestdiff; |
| for (k=0; k<8; k++) { |
| vect2 = vect; |
| vect2.d[0] += offsets[k].d[0]; |
| vect2.d[1] += offsets[k].d[1]; |
| EVAL_MOTION(vect2); |
| } |
| vect = bestpick; |
| } |
| offset = (i/blocksize)*enc->width/blocksize + j/blocksize; |
| this_motion[offset] = bestpick; |
| } |
| } |
| |
| /** |
| * Gets distortion for all options available to a subcel |
| */ |
| static void gather_data_for_subcel(SubcelEvaluation *subcel, int x, |
| int y, RoqContext *enc, RoqTempdata *tempData) |
| { |
| uint8_t mb4[4*4*3]; |
| uint8_t mb2[2*2*3]; |
| int cluster_index; |
| int i, best_dist; |
| |
| static const int bitsUsed[4] = {2, 10, 10, 34}; |
| |
| if (enc->framesSinceKeyframe >= 1) { |
| subcel->motion = enc->this_motion4[y*enc->width/16 + x/4]; |
| |
| subcel->eval_dist[RoQ_ID_FCC] = |
| eval_motion_dist(enc, x, y, |
| enc->this_motion4[y*enc->width/16 + x/4], 4); |
| } else |
| subcel->eval_dist[RoQ_ID_FCC] = INT_MAX; |
| |
| if (enc->framesSinceKeyframe >= 2) |
| subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data, |
| enc->current_frame->data, x, |
| y, x, y, |
| enc->frame_to_enc->linesize, |
| enc->current_frame->linesize, |
| 4); |
| else |
| subcel->eval_dist[RoQ_ID_MOT] = INT_MAX; |
| |
| cluster_index = y*enc->width/16 + x/4; |
| |
| get_frame_mb(enc->frame_to_enc, x, y, mb4, 4); |
| |
| subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4, |
| tempData->codebooks.unpacked_cb4, |
| tempData->codebooks.numCB4, |
| &subcel->cbEntry, 4); |
| |
| subcel->eval_dist[RoQ_ID_CCC] = 0; |
| |
| for(i=0;i<4;i++) { |
| subcel->subCels[i] = tempData->closest_cb2[cluster_index*4+i]; |
| |
| get_frame_mb(enc->frame_to_enc, x+2*(i&1), |
| y+(i&2), mb2, 2); |
| |
| subcel->eval_dist[RoQ_ID_CCC] += |
| squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2); |
| } |
| |
| best_dist = INT_MAX; |
| for (i=0; i<4; i++) |
| if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] < |
| best_dist) { |
| subcel->best_coding = i; |
| subcel->best_bit_use = bitsUsed[i]; |
| best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + |
| enc->lambda*bitsUsed[i]; |
| } |
| } |
| |
| /** |
| * Gets distortion for all options available to a cel |
| */ |
| static void gather_data_for_cel(CelEvaluation *cel, RoqContext *enc, |
| RoqTempdata *tempData) |
| { |
| uint8_t mb8[8*8*3]; |
| int index = cel->sourceY*enc->width/64 + cel->sourceX/8; |
| int i, j, best_dist, divide_bit_use; |
| |
| int bitsUsed[4] = {2, 10, 10, 0}; |
| |
| if (enc->framesSinceKeyframe >= 1) { |
| cel->motion = enc->this_motion8[index]; |
| |
| cel->eval_dist[RoQ_ID_FCC] = |
| eval_motion_dist(enc, cel->sourceX, cel->sourceY, |
| enc->this_motion8[index], 8); |
| } else |
| cel->eval_dist[RoQ_ID_FCC] = INT_MAX; |
| |
| if (enc->framesSinceKeyframe >= 2) |
| cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data, |
| enc->current_frame->data, |
| cel->sourceX, cel->sourceY, |
| cel->sourceX, cel->sourceY, |
| enc->frame_to_enc->linesize, |
| enc->current_frame->linesize,8); |
| else |
| cel->eval_dist[RoQ_ID_MOT] = INT_MAX; |
| |
| get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8); |
| |
| cel->eval_dist[RoQ_ID_SLD] = |
| index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged, |
| tempData->codebooks.numCB4, &cel->cbEntry, 8); |
| |
| gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc, tempData); |
| gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc, tempData); |
| gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc, tempData); |
| gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc, tempData); |
| |
| cel->eval_dist[RoQ_ID_CCC] = 0; |
| divide_bit_use = 0; |
| for (i=0; i<4; i++) { |
| cel->eval_dist[RoQ_ID_CCC] += |
| cel->subCels[i].eval_dist[cel->subCels[i].best_coding]; |
| divide_bit_use += cel->subCels[i].best_bit_use; |
| } |
| |
| best_dist = INT_MAX; |
| bitsUsed[3] = 2 + divide_bit_use; |
| |
| for (i=0; i<4; i++) |
| if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] < |
| best_dist) { |
| cel->best_coding = i; |
| best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] + |
| enc->lambda*bitsUsed[i]; |
| } |
| |
| tempData->used_option[cel->best_coding]++; |
| tempData->mainChunkSize += bitsUsed[cel->best_coding]; |
| |
| if (cel->best_coding == RoQ_ID_SLD) |
| tempData->codebooks.usedCB4[cel->cbEntry]++; |
| |
| if (cel->best_coding == RoQ_ID_CCC) |
| for (i=0; i<4; i++) { |
| if (cel->subCels[i].best_coding == RoQ_ID_SLD) |
| tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++; |
| else if (cel->subCels[i].best_coding == RoQ_ID_CCC) |
| for (j=0; j<4; j++) |
| tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++; |
| } |
| } |
| |
| static void remap_codebooks(RoqContext *enc, RoqTempdata *tempData) |
| { |
| int i, j, idx=0; |
| |
| /* Make remaps for the final codebook usage */ |
| for (i=0; i<MAX_CBS_4x4; i++) { |
| if (tempData->codebooks.usedCB4[i]) { |
| tempData->i2f4[i] = idx; |
| tempData->f2i4[idx] = i; |
| for (j=0; j<4; j++) |
| tempData->codebooks.usedCB2[enc->cb4x4[i].idx[j]]++; |
| idx++; |
| } |
| } |
| |
| tempData->numCB4 = idx; |
| |
| idx = 0; |
| for (i=0; i<MAX_CBS_2x2; i++) { |
| if (tempData->codebooks.usedCB2[i]) { |
| tempData->i2f2[i] = idx; |
| tempData->f2i2[idx] = i; |
| idx++; |
| } |
| } |
| tempData->numCB2 = idx; |
| |
| } |
| |
| /** |
| * Write codebook chunk |
| */ |
| static void write_codebooks(RoqContext *enc, RoqTempdata *tempData) |
| { |
| int i, j; |
| uint8_t **outp= &enc->out_buf; |
| |
| if (tempData->numCB2) { |
| bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK); |
| bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4); |
| bytestream_put_byte(outp, tempData->numCB4); |
| bytestream_put_byte(outp, tempData->numCB2); |
| |
| for (i=0; i<tempData->numCB2; i++) { |
| bytestream_put_buffer(outp, enc->cb2x2[tempData->f2i2[i]].y, 4); |
| bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].u); |
| bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].v); |
| } |
| |
| for (i=0; i<tempData->numCB4; i++) |
| for (j=0; j<4; j++) |
| bytestream_put_byte(outp, tempData->i2f2[enc->cb4x4[tempData->f2i4[i]].idx[j]]); |
| |
| } |
| } |
| |
| static inline uint8_t motion_arg(motion_vect mot) |
| { |
| uint8_t ax = 8 - ((uint8_t) mot.d[0]); |
| uint8_t ay = 8 - ((uint8_t) mot.d[1]); |
| return ((ax&15)<<4) | (ay&15); |
| } |
| |
| typedef struct |
| { |
| int typeSpool; |
| int typeSpoolLength; |
| uint8_t argumentSpool[64]; |
| uint8_t *args; |
| uint8_t **pout; |
| } CodingSpool; |
| |
| /* NOTE: Typecodes must be spooled AFTER arguments!! */ |
| static void write_typecode(CodingSpool *s, uint8_t type) |
| { |
| s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength); |
| s->typeSpoolLength += 2; |
| if (s->typeSpoolLength == 16) { |
| bytestream_put_le16(s->pout, s->typeSpool); |
| bytestream_put_buffer(s->pout, s->argumentSpool, |
| s->args - s->argumentSpool); |
| s->typeSpoolLength = 0; |
| s->typeSpool = 0; |
| s->args = s->argumentSpool; |
| } |
| } |
| |
| static void reconstruct_and_encode_image(RoqContext *enc, RoqTempdata *tempData, int w, int h, int numBlocks) |
| { |
| int i, j, k; |
| int x, y; |
| int subX, subY; |
| int dist=0; |
| |
| roq_qcell *qcell; |
| CelEvaluation *eval; |
| |
| CodingSpool spool; |
| |
| spool.typeSpool=0; |
| spool.typeSpoolLength=0; |
| spool.args = spool.argumentSpool; |
| spool.pout = &enc->out_buf; |
| |
| if (tempData->used_option[RoQ_ID_CCC]%2) |
| tempData->mainChunkSize+=8; //FIXME |
| |
| /* Write the video chunk header */ |
| bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ); |
| bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8); |
| bytestream_put_byte(&enc->out_buf, 0x0); |
| bytestream_put_byte(&enc->out_buf, 0x0); |
| |
| for (i=0; i<numBlocks; i++) { |
| eval = tempData->cel_evals + i; |
| |
| x = eval->sourceX; |
| y = eval->sourceY; |
| dist += eval->eval_dist[eval->best_coding]; |
| |
| switch (eval->best_coding) { |
| case RoQ_ID_MOT: |
| write_typecode(&spool, RoQ_ID_MOT); |
| break; |
| |
| case RoQ_ID_FCC: |
| bytestream_put_byte(&spool.args, motion_arg(eval->motion)); |
| |
| write_typecode(&spool, RoQ_ID_FCC); |
| ff_apply_motion_8x8(enc, x, y, |
| eval->motion.d[0], eval->motion.d[1]); |
| break; |
| |
| case RoQ_ID_SLD: |
| bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]); |
| write_typecode(&spool, RoQ_ID_SLD); |
| |
| qcell = enc->cb4x4 + eval->cbEntry; |
| ff_apply_vector_4x4(enc, x , y , enc->cb2x2 + qcell->idx[0]); |
| ff_apply_vector_4x4(enc, x+4, y , enc->cb2x2 + qcell->idx[1]); |
| ff_apply_vector_4x4(enc, x , y+4, enc->cb2x2 + qcell->idx[2]); |
| ff_apply_vector_4x4(enc, x+4, y+4, enc->cb2x2 + qcell->idx[3]); |
| break; |
| |
| case RoQ_ID_CCC: |
| write_typecode(&spool, RoQ_ID_CCC); |
| |
| for (j=0; j<4; j++) { |
| subX = x + 4*(j&1); |
| subY = y + 2*(j&2); |
| |
| switch(eval->subCels[j].best_coding) { |
| case RoQ_ID_MOT: |
| break; |
| |
| case RoQ_ID_FCC: |
| bytestream_put_byte(&spool.args, |
| motion_arg(eval->subCels[j].motion)); |
| |
| ff_apply_motion_4x4(enc, subX, subY, |
| eval->subCels[j].motion.d[0], |
| eval->subCels[j].motion.d[1]); |
| break; |
| |
| case RoQ_ID_SLD: |
| bytestream_put_byte(&spool.args, |
| tempData->i2f4[eval->subCels[j].cbEntry]); |
| |
| qcell = enc->cb4x4 + eval->subCels[j].cbEntry; |
| |
| ff_apply_vector_2x2(enc, subX , subY , |
| enc->cb2x2 + qcell->idx[0]); |
| ff_apply_vector_2x2(enc, subX+2, subY , |
| enc->cb2x2 + qcell->idx[1]); |
| ff_apply_vector_2x2(enc, subX , subY+2, |
| enc->cb2x2 + qcell->idx[2]); |
| ff_apply_vector_2x2(enc, subX+2, subY+2, |
| enc->cb2x2 + qcell->idx[3]); |
| break; |
| |
| case RoQ_ID_CCC: |
| for (k=0; k<4; k++) { |
| int cb_idx = eval->subCels[j].subCels[k]; |
| bytestream_put_byte(&spool.args, |
| tempData->i2f2[cb_idx]); |
| |
| ff_apply_vector_2x2(enc, subX + 2*(k&1), subY + (k&2), |
| enc->cb2x2 + cb_idx); |
| } |
| break; |
| } |
| write_typecode(&spool, eval->subCels[j].best_coding); |
| } |
| break; |
| } |
| } |
| |
| /* Flush the remainder of the argument/type spool */ |
| while (spool.typeSpoolLength) |
| write_typecode(&spool, 0x0); |
| |
| #if 0 |
| uint8_t *fdata[3] = {enc->frame_to_enc->data[0], |
| enc->frame_to_enc->data[1], |
| enc->frame_to_enc->data[2]}; |
| uint8_t *cdata[3] = {enc->current_frame->data[0], |
| enc->current_frame->data[1], |
| enc->current_frame->data[2]}; |
| av_log(enc->avctx, AV_LOG_ERROR, "Expected distortion: %i Actual: %i\n", |
| dist, |
| block_sse(fdata, cdata, 0, 0, 0, 0, |
| enc->frame_to_enc->linesize, |
| enc->current_frame->linesize, |
| enc->width)); //WARNING: Square dimensions implied... |
| #endif |
| } |
| |
| |
| /** |
| * Create a single YUV cell from a 2x2 section of the image |
| */ |
| static inline void frame_block_to_cell(uint8_t *block, uint8_t **data, |
| int top, int left, int *stride) |
| { |
| int i, j, u=0, v=0; |
| |
| for (i=0; i<2; i++) |
| for (j=0; j<2; j++) { |
| int x = (top+i)*stride[0] + left + j; |
| *block++ = data[0][x]; |
| x = (top+i)*stride[1] + left + j; |
| u += data[1][x]; |
| v += data[2][x]; |
| } |
| |
| *block++ = (u+2)/4; |
| *block++ = (v+2)/4; |
| } |
| |
| /** |
| * Creates YUV clusters for the entire image |
| */ |
| static void create_clusters(AVFrame *frame, int w, int h, uint8_t *yuvClusters) |
| { |
| int i, j, k, l; |
| |
| for (i=0; i<h; i+=4) |
| for (j=0; j<w; j+=4) { |
| for (k=0; k < 2; k++) |
| for (l=0; l < 2; l++) |
| frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data, |
| i+2*k, j+2*l, frame->linesize); |
| yuvClusters += 24; |
| } |
| } |
| |
| static void generate_codebook(RoqContext *enc, RoqTempdata *tempdata, |
| int *points, int inputCount, roq_cell *results, |
| int size, int cbsize) |
| { |
| int i, j, k; |
| int c_size = size*size/4; |
| int *buf = points; |
| int *codebook = av_malloc(6*c_size*cbsize*sizeof(int)); |
| int *closest_cb; |
| |
| if (size == 4) |
| closest_cb = av_malloc(6*c_size*inputCount*sizeof(int)); |
| else |
| closest_cb = tempdata->closest_cb2; |
| |
| ff_init_elbg(points, 6*c_size, inputCount, codebook, cbsize, 1, closest_cb, &enc->randctx); |
| ff_do_elbg(points, 6*c_size, inputCount, codebook, cbsize, 1, closest_cb, &enc->randctx); |
| |
| if (size == 4) |
| av_free(closest_cb); |
| |
| buf = codebook; |
| for (i=0; i<cbsize; i++) |
| for (k=0; k<c_size; k++) { |
| for(j=0; j<4; j++) |
| results->y[j] = *buf++; |
| |
| results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS; |
| results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS; |
| results++; |
| } |
| |
| av_free(codebook); |
| } |
| |
| static void generate_new_codebooks(RoqContext *enc, RoqTempdata *tempData) |
| { |
| int i,j; |
| RoqCodebooks *codebooks = &tempData->codebooks; |
| int max = enc->width*enc->height/16; |
| uint8_t mb2[3*4]; |
| roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4); |
| uint8_t *yuvClusters=av_malloc(sizeof(int)*max*6*4); |
| int *points = av_malloc(max*6*4*sizeof(int)); |
| int bias; |
| |
| /* Subsample YUV data */ |
| create_clusters(enc->frame_to_enc, enc->width, enc->height, yuvClusters); |
| |
| /* Cast to integer and apply chroma bias */ |
| for (i=0; i<max*24; i++) { |
| bias = ((i%6)<4) ? 1 : CHROMA_BIAS; |
| points[i] = bias*yuvClusters[i]; |
| } |
| |
| /* Create 4x4 codebooks */ |
| generate_codebook(enc, tempData, points, max, results4, 4, MAX_CBS_4x4); |
| |
| codebooks->numCB4 = MAX_CBS_4x4; |
| |
| tempData->closest_cb2 = av_malloc(max*4*sizeof(int)); |
| |
| /* Create 2x2 codebooks */ |
| generate_codebook(enc, tempData, points, max*4, enc->cb2x2, 2, MAX_CBS_2x2); |
| |
| codebooks->numCB2 = MAX_CBS_2x2; |
| |
| /* Unpack 2x2 codebook clusters */ |
| for (i=0; i<codebooks->numCB2; i++) |
| unpack_roq_cell(enc->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3); |
| |
| /* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */ |
| for (i=0; i<codebooks->numCB4; i++) { |
| for (j=0; j<4; j++) { |
| unpack_roq_cell(&results4[4*i + j], mb2); |
| index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2, |
| &enc->cb4x4[i].idx[j], 2); |
| } |
| unpack_roq_qcell(codebooks->unpacked_cb2, enc->cb4x4 + i, |
| codebooks->unpacked_cb4 + i*4*4*3); |
| enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3, |
| codebooks->unpacked_cb4_enlarged + i*8*8*3); |
| } |
| |
| av_free(yuvClusters); |
| av_free(points); |
| av_free(results4); |
| } |
| |
| static void roq_encode_video(RoqContext *enc) |
| { |
| RoqTempdata *tempData = enc->tmpData; |
| int i; |
| |
| memset(tempData, 0, sizeof(*tempData)); |
| |
| create_cel_evals(enc, tempData); |
| |
| generate_new_codebooks(enc, tempData); |
| |
| if (enc->framesSinceKeyframe >= 1) { |
| motion_search(enc, 8); |
| motion_search(enc, 4); |
| } |
| |
| retry_encode: |
| for (i=0; i<enc->width*enc->height/64; i++) |
| gather_data_for_cel(tempData->cel_evals + i, enc, tempData); |
| |
| /* Quake 3 can't handle chunks bigger than 65536 bytes */ |
| if (tempData->mainChunkSize/8 > 65536) { |
| enc->lambda *= .8; |
| goto retry_encode; |
| } |
| |
| remap_codebooks(enc, tempData); |
| |
| write_codebooks(enc, tempData); |
| |
| reconstruct_and_encode_image(enc, tempData, enc->width, enc->height, |
| enc->width*enc->height/64); |
| |
| enc->avctx->coded_frame = enc->current_frame; |
| |
| /* Rotate frame history */ |
| FFSWAP(AVFrame *, enc->current_frame, enc->last_frame); |
| FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4); |
| FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8); |
| |
| av_free(tempData->cel_evals); |
| av_free(tempData->closest_cb2); |
| |
| enc->framesSinceKeyframe++; |
| } |
| |
| static int roq_encode_init(AVCodecContext *avctx) |
| { |
| RoqContext *enc = avctx->priv_data; |
| |
| av_lfg_init(&enc->randctx, 1); |
| |
| enc->framesSinceKeyframe = 0; |
| if ((avctx->width & 0xf) || (avctx->height & 0xf)) { |
| av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n"); |
| return -1; |
| } |
| |
| if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1))) |
| av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two\n"); |
| |
| if (avcodec_check_dimensions(avctx, avctx->width, avctx->height)) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", |
| avctx->width, avctx->height); |
| return -1; |
| } |
| |
| enc->width = avctx->width; |
| enc->height = avctx->height; |
| |
| enc->framesSinceKeyframe = 0; |
| enc->first_frame = 1; |
| |
| enc->last_frame = &enc->frames[0]; |
| enc->current_frame = &enc->frames[1]; |
| |
| enc->tmpData = av_malloc(sizeof(RoqTempdata)); |
| |
| enc->this_motion4 = |
| av_mallocz((enc->width*enc->height/16)*sizeof(motion_vect)); |
| |
| enc->last_motion4 = |
| av_malloc ((enc->width*enc->height/16)*sizeof(motion_vect)); |
| |
| enc->this_motion8 = |
| av_mallocz((enc->width*enc->height/64)*sizeof(motion_vect)); |
| |
| enc->last_motion8 = |
| av_malloc ((enc->width*enc->height/64)*sizeof(motion_vect)); |
| |
| return 0; |
| } |
| |
| static void roq_write_video_info_chunk(RoqContext *enc) |
| { |
| /* ROQ info chunk */ |
| bytestream_put_le16(&enc->out_buf, RoQ_INFO); |
| |
| /* Size: 8 bytes */ |
| bytestream_put_le32(&enc->out_buf, 8); |
| |
| /* Unused argument */ |
| bytestream_put_byte(&enc->out_buf, 0x00); |
| bytestream_put_byte(&enc->out_buf, 0x00); |
| |
| /* Width */ |
| bytestream_put_le16(&enc->out_buf, enc->width); |
| |
| /* Height */ |
| bytestream_put_le16(&enc->out_buf, enc->height); |
| |
| /* Unused in Quake 3, mimics the output of the real encoder */ |
| bytestream_put_byte(&enc->out_buf, 0x08); |
| bytestream_put_byte(&enc->out_buf, 0x00); |
| bytestream_put_byte(&enc->out_buf, 0x04); |
| bytestream_put_byte(&enc->out_buf, 0x00); |
| } |
| |
| static int roq_encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data) |
| { |
| RoqContext *enc = avctx->priv_data; |
| AVFrame *frame= data; |
| uint8_t *buf_start = buf; |
| |
| enc->out_buf = buf; |
| enc->avctx = avctx; |
| |
| enc->frame_to_enc = frame; |
| |
| if (frame->quality) |
| enc->lambda = frame->quality - 1; |
| else |
| enc->lambda = 2*ROQ_LAMBDA_SCALE; |
| |
| /* 138 bits max per 8x8 block + |
| * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */ |
| if (((enc->width*enc->height/64)*138+7)/8 + 256*(6+4) + 8 > buf_size) { |
| av_log(avctx, AV_LOG_ERROR, " RoQ: Output buffer too small!\n"); |
| return -1; |
| } |
| |
| /* Check for I frame */ |
| if (enc->framesSinceKeyframe == avctx->gop_size) |
| enc->framesSinceKeyframe = 0; |
| |
| if (enc->first_frame) { |
| /* Alloc memory for the reconstruction data (we must know the stride |
| for that) */ |
| if (avctx->get_buffer(avctx, enc->current_frame) || |
| avctx->get_buffer(avctx, enc->last_frame)) { |
| av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n"); |
| return -1; |
| } |
| |
| /* Before the first video frame, write a "video info" chunk */ |
| roq_write_video_info_chunk(enc); |
| |
| enc->first_frame = 0; |
| } |
| |
| /* Encode the actual frame */ |
| roq_encode_video(enc); |
| |
| return enc->out_buf - buf_start; |
| } |
| |
| static int roq_encode_end(AVCodecContext *avctx) |
| { |
| RoqContext *enc = avctx->priv_data; |
| |
| avctx->release_buffer(avctx, enc->last_frame); |
| avctx->release_buffer(avctx, enc->current_frame); |
| |
| av_free(enc->tmpData); |
| av_free(enc->this_motion4); |
| av_free(enc->last_motion4); |
| av_free(enc->this_motion8); |
| av_free(enc->last_motion8); |
| |
| return 0; |
| } |
| |
| AVCodec roq_encoder = |
| { |
| "roqvideo", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_ROQ, |
| sizeof(RoqContext), |
| roq_encode_init, |
| roq_encode_frame, |
| roq_encode_end, |
| .supported_framerates = (AVRational[]){{30,1}, {0,0}}, |
| .pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV444P, PIX_FMT_NONE}, |
| .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"), |
| }; |
