| /* |
| * 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 |
| * 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 "libavutil/attributes.h" |
| #include "libavutil/lfg.h" |
| #include "libavutil/opt.h" |
| #include "roqvideo.h" |
| #include "bytestream.h" |
| #include "elbg.h" |
| #include "internal.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 256 |
| |
| #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) |
| |
| typedef struct RoqCodebooks { |
| 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 |
| { |
| 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 used_option[4]; |
| } RoqTempData; |
| |
| typedef struct SubcelEvaluation { |
| int eval_dist[4]; |
| int best_bit_use; |
| int best_coding; |
| |
| int subCels[4]; |
| motion_vect motion; |
| int cbEntry; |
| } SubcelEvaluation; |
| |
| typedef struct CelEvaluation { |
| int eval_dist[4]; |
| int best_coding; |
| |
| SubcelEvaluation subCels[4]; |
| |
| motion_vect motion; |
| int cbEntry; |
| |
| int sourceX, sourceY; |
| } CelEvaluation; |
| |
| typedef struct RoqEncContext { |
| RoqContext common; |
| AVLFG randctx; |
| uint64_t lambda; |
| |
| motion_vect *this_motion4; |
| motion_vect *last_motion4; |
| |
| motion_vect *this_motion8; |
| motion_vect *last_motion8; |
| |
| unsigned int framesSinceKeyframe; |
| |
| const AVFrame *frame_to_enc; |
| uint8_t *out_buf; |
| RoqTempData tmp_data; |
| roq_cell results4[4 * MAX_CBS_4x4]; |
| int tmp_codebook_buf[FFMAX(24 * MAX_CBS_4x4, 6 * MAX_CBS_2x2)]; |
| |
| CelEvaluation *cel_evals; |
| int *closest_cb; |
| int *points; // Allocated together with closest_cb |
| |
| int first_frame; |
| int quake3_compat; // Quake 3 compatibility option |
| } RoqEncContext; |
| |
| /* 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(const uint8_t *a, const 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 * const *buf1, uint8_t * const *buf2, int x1, int y1, |
| int x2, int y2, const int *stride1, const 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(RoqEncContext *enc, int x, int y, motion_vect vect, |
| int size) |
| { |
| RoqContext *const roq = &enc->common; |
| 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 > roq->width-size || (unsigned) my > roq->height-size) |
| return INT_MAX; |
| |
| return block_sse(enc->frame_to_enc->data, roq->last_frame->data, x, y, |
| mx, my, |
| enc->frame_to_enc->linesize, roq->last_frame->linesize, |
| size); |
| } |
| |
| /** |
| * @return 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; |
| } |
| |
| /** |
| * Initialize cel evaluators and set their source coordinates |
| */ |
| static int create_cel_evals(RoqEncContext *enc) |
| { |
| RoqContext *const roq = &enc->common; |
| |
| enc->cel_evals = av_malloc_array(roq->width * roq->height / 64, sizeof(CelEvaluation)); |
| if (!enc->cel_evals) |
| return AVERROR(ENOMEM); |
| |
| /* Map to the ROQ quadtree order */ |
| for (int y = 0, n = 0; y < roq->height; y += 16) |
| for (int x = 0; x < roq->width; x += 16) |
| for(int i = 0; i < 4; i++) { |
| enc->cel_evals[n ].sourceX = x + (i&1)*8; |
| enc->cel_evals[n++].sourceY = y + (i&2)*4; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Get macroblocks from parts of the image |
| */ |
| static void get_frame_mb(const 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(RoqEncContext *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}}, |
| }; |
| |
| RoqContext *const roq = &enc->common; |
| 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; |
| const int max = (roq->width / blocksize) * roq->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< roq->height; i += blocksize) |
| for (j = 0; j < roq->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) * (roq->width/8) + j/8]); |
| |
| offset = (i/blocksize) * roq->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) * roq->width / blocksize + j / blocksize; |
| if (offset < max && offset >= 0) |
| EVAL_MOTION(last_motion[offset]); |
| |
| off[0]= (i/blocksize) * roq->width / blocksize + j/blocksize - 1; |
| off[1]= off[0] - roq->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) * roq->width / blocksize + j/blocksize; |
| this_motion[offset] = bestpick; |
| } |
| } |
| |
| /** |
| * Get distortion for all options available to a subcel |
| */ |
| static void gather_data_for_subcel(SubcelEvaluation *subcel, int x, |
| int y, RoqEncContext *enc) |
| { |
| RoqContext *const roq = &enc->common; |
| RoqTempData *const tempData = &enc->tmp_data; |
| 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 * roq->width / 16 + x / 4]; |
| |
| subcel->eval_dist[RoQ_ID_FCC] = |
| eval_motion_dist(enc, x, y, |
| enc->this_motion4[y * roq->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, |
| roq->current_frame->data, x, |
| y, x, y, |
| enc->frame_to_enc->linesize, |
| roq->current_frame->linesize, |
| 4); |
| else |
| subcel->eval_dist[RoQ_ID_MOT] = INT_MAX; |
| |
| cluster_index = y * roq->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] = enc->closest_cb[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]; |
| } |
| } |
| |
| /** |
| * Get distortion for all options available to a cel |
| */ |
| static void gather_data_for_cel(CelEvaluation *cel, RoqEncContext *enc) |
| { |
| RoqContext *const roq = &enc->common; |
| RoqTempData *const tempData = &enc->tmp_data; |
| uint8_t mb8[8*8*3]; |
| int index = cel->sourceY * roq->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, |
| roq->current_frame->data, |
| cel->sourceX, cel->sourceY, |
| cel->sourceX, cel->sourceY, |
| enc->frame_to_enc->linesize, |
| roq->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); |
| gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc); |
| gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc); |
| gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc); |
| |
| 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(RoqEncContext *enc) |
| { |
| RoqContext *const roq = &enc->common; |
| RoqTempData *const tempData = &enc->tmp_data; |
| int i, j, idx=0; |
| |
| /* Make remaps for the final codebook usage */ |
| for (i=0; i<(enc->quake3_compat ? MAX_CBS_4x4-1 : 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[roq->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(RoqEncContext *enc) |
| { |
| RoqContext *const roq = &enc->common; |
| RoqTempData *const tempData = &enc->tmp_data; |
| 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, roq->cb2x2[tempData->f2i2[i]].y, 4); |
| bytestream_put_byte(outp, roq->cb2x2[tempData->f2i2[i]].u); |
| bytestream_put_byte(outp, roq->cb2x2[tempData->f2i2[i]].v); |
| } |
| |
| for (i=0; i<tempData->numCB4; i++) |
| for (j=0; j<4; j++) |
| bytestream_put_byte(outp, tempData->i2f2[roq->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 CodingSpool { |
| 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(RoqEncContext *enc, |
| int w, int h, int numBlocks) |
| { |
| RoqContext *const roq = &enc->common; |
| RoqTempData *const tempData = &enc->tmp_data; |
| 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 = enc->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(roq, 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 = roq->cb4x4 + eval->cbEntry; |
| ff_apply_vector_4x4(roq, x , y , roq->cb2x2 + qcell->idx[0]); |
| ff_apply_vector_4x4(roq, x+4, y , roq->cb2x2 + qcell->idx[1]); |
| ff_apply_vector_4x4(roq, x , y+4, roq->cb2x2 + qcell->idx[2]); |
| ff_apply_vector_4x4(roq, x+4, y+4, roq->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(roq, 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 = roq->cb4x4 + eval->subCels[j].cbEntry; |
| |
| ff_apply_vector_2x2(roq, subX , subY , |
| roq->cb2x2 + qcell->idx[0]); |
| ff_apply_vector_2x2(roq, subX+2, subY , |
| roq->cb2x2 + qcell->idx[1]); |
| ff_apply_vector_2x2(roq, subX , subY+2, |
| roq->cb2x2 + qcell->idx[2]); |
| ff_apply_vector_2x2(roq, subX+2, subY+2, |
| roq->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(roq, subX + 2*(k&1), subY + (k&2), |
| roq->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); |
| } |
| |
| |
| /** |
| * Create a single YUV cell from a 2x2 section of the image |
| */ |
| static inline void frame_block_to_cell(int *block, uint8_t * const *data, |
| int top, int left, const 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 * CHROMA_BIAS; |
| *block++ = (v + 2) / 4 * CHROMA_BIAS; |
| } |
| |
| /** |
| * Create YUV clusters for the entire image |
| */ |
| static void create_clusters(const AVFrame *frame, int w, int h, int *points) |
| { |
| 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(points + (l + 2*k)*6, frame->data, |
| i+2*k, j+2*l, frame->linesize); |
| points += 24; |
| } |
| } |
| |
| static int generate_codebook(RoqEncContext *enc, |
| int *points, int inputCount, roq_cell *results, |
| int size, int cbsize) |
| { |
| int i, j, k, ret = 0; |
| int c_size = size*size/4; |
| int *buf; |
| int *codebook = enc->tmp_codebook_buf; |
| int *closest_cb = enc->closest_cb; |
| |
| ret = avpriv_init_elbg(points, 6 * c_size, inputCount, codebook, |
| cbsize, 1, closest_cb, &enc->randctx); |
| if (ret < 0) |
| return ret; |
| ret = avpriv_do_elbg(points, 6 * c_size, inputCount, codebook, |
| cbsize, 1, closest_cb, &enc->randctx); |
| if (ret < 0) |
| return ret; |
| |
| 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++; |
| } |
| return 0; |
| } |
| |
| static int generate_new_codebooks(RoqEncContext *enc) |
| { |
| int i, j, ret = 0; |
| RoqCodebooks *codebooks = &enc->tmp_data.codebooks; |
| RoqContext *const roq = &enc->common; |
| int max = roq->width * roq->height / 16; |
| uint8_t mb2[3*4]; |
| int *points = enc->points; |
| |
| /* Subsample YUV data */ |
| create_clusters(enc->frame_to_enc, roq->width, roq->height, points); |
| |
| codebooks->numCB4 = (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); |
| |
| /* Create 4x4 codebooks */ |
| if ((ret = generate_codebook(enc, points, max, enc->results4, |
| 4, codebooks->numCB4)) < 0) |
| return ret; |
| |
| /* Create 2x2 codebooks */ |
| if ((ret = generate_codebook(enc, points, max * 4, |
| roq->cb2x2, 2, MAX_CBS_2x2)) < 0) |
| return ret; |
| |
| codebooks->numCB2 = MAX_CBS_2x2; |
| |
| /* Unpack 2x2 codebook clusters */ |
| for (i=0; i<codebooks->numCB2; i++) |
| unpack_roq_cell(roq->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(&enc->results4[4*i + j], mb2); |
| index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2, |
| &roq->cb4x4[i].idx[j], 2); |
| } |
| unpack_roq_qcell(codebooks->unpacked_cb2, roq->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); |
| } |
| |
| return 0; |
| } |
| |
| static int roq_encode_video(RoqEncContext *enc) |
| { |
| RoqTempData *const tempData = &enc->tmp_data; |
| RoqContext *const roq = &enc->common; |
| int ret; |
| |
| memset(tempData, 0, sizeof(*tempData)); |
| |
| ret = generate_new_codebooks(enc); |
| if (ret < 0) |
| return ret; |
| |
| if (enc->framesSinceKeyframe >= 1) { |
| motion_search(enc, 8); |
| motion_search(enc, 4); |
| } |
| |
| retry_encode: |
| for (int i = 0; i < roq->width * roq->height / 64; i++) |
| gather_data_for_cel(enc->cel_evals + i, enc); |
| |
| /* Quake 3 can't handle chunks bigger than 65535 bytes */ |
| if (tempData->mainChunkSize/8 > 65535 && enc->quake3_compat) { |
| if (enc->lambda > 100000) { |
| av_log(roq->avctx, AV_LOG_ERROR, "Cannot encode video in Quake compatible form\n"); |
| return AVERROR(EINVAL); |
| } |
| av_log(roq->avctx, AV_LOG_ERROR, |
| "Warning, generated a frame too big for Quake (%d > 65535), " |
| "now switching to a bigger qscale value.\n", |
| tempData->mainChunkSize/8); |
| enc->lambda *= 1.5; |
| tempData->mainChunkSize = 0; |
| memset(tempData->used_option, 0, sizeof(tempData->used_option)); |
| memset(tempData->codebooks.usedCB4, 0, |
| sizeof(tempData->codebooks.usedCB4)); |
| memset(tempData->codebooks.usedCB2, 0, |
| sizeof(tempData->codebooks.usedCB2)); |
| |
| goto retry_encode; |
| } |
| |
| remap_codebooks(enc); |
| |
| write_codebooks(enc); |
| |
| reconstruct_and_encode_image(enc, roq->width, roq->height, |
| roq->width * roq->height / 64); |
| |
| /* Rotate frame history */ |
| FFSWAP(AVFrame *, roq->current_frame, roq->last_frame); |
| FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4); |
| FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8); |
| |
| enc->framesSinceKeyframe++; |
| |
| return 0; |
| } |
| |
| static av_cold int roq_encode_end(AVCodecContext *avctx) |
| { |
| RoqEncContext *const enc = avctx->priv_data; |
| |
| av_frame_free(&enc->common.current_frame); |
| av_frame_free(&enc->common.last_frame); |
| |
| av_freep(&enc->cel_evals); |
| av_freep(&enc->closest_cb); |
| av_freep(&enc->this_motion4); |
| av_freep(&enc->last_motion4); |
| av_freep(&enc->this_motion8); |
| av_freep(&enc->last_motion8); |
| |
| return 0; |
| } |
| |
| static av_cold int roq_encode_init(AVCodecContext *avctx) |
| { |
| RoqEncContext *const enc = avctx->priv_data; |
| RoqContext *const roq = &enc->common; |
| |
| av_lfg_init(&enc->randctx, 1); |
| |
| roq->avctx = avctx; |
| |
| enc->framesSinceKeyframe = 0; |
| if ((avctx->width & 0xf) || (avctx->height & 0xf)) { |
| av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (avctx->width > 65535 || avctx->height > 65535) { |
| av_log(avctx, AV_LOG_ERROR, "Dimensions are max %d\n", enc->quake3_compat ? 32768 : 65535); |
| return AVERROR(EINVAL); |
| } |
| |
| if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1))) |
| av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two, this is not supported by quake\n"); |
| |
| roq->width = avctx->width; |
| roq->height = avctx->height; |
| |
| enc->framesSinceKeyframe = 0; |
| enc->first_frame = 1; |
| |
| roq->last_frame = av_frame_alloc(); |
| roq->current_frame = av_frame_alloc(); |
| if (!roq->last_frame || !roq->current_frame) |
| return AVERROR(ENOMEM); |
| |
| enc->this_motion4 = |
| av_mallocz_array(roq->width * roq->height / 16, sizeof(motion_vect)); |
| |
| enc->last_motion4 = |
| av_malloc_array (roq->width * roq->height / 16, sizeof(motion_vect)); |
| |
| enc->this_motion8 = |
| av_mallocz_array(roq->width * roq->height / 64, sizeof(motion_vect)); |
| |
| enc->last_motion8 = |
| av_malloc_array (roq->width * roq->height / 64, sizeof(motion_vect)); |
| |
| /* 4x4 codebook needs 6 * 4 * 4 / 4 * width * height / 16 * sizeof(int); |
| * and so does the points buffer. */ |
| enc->closest_cb = |
| av_malloc_array(roq->width * roq->height, 3 * sizeof(int)); |
| |
| if (!enc->this_motion4 || !enc->last_motion4 || |
| !enc->this_motion8 || !enc->last_motion8 || !enc->closest_cb) |
| return AVERROR(ENOMEM); |
| |
| enc->points = enc->closest_cb + roq->width * roq->height * 3 / 2; |
| |
| return create_cel_evals(enc); |
| } |
| |
| static void roq_write_video_info_chunk(RoqEncContext *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->common.width); |
| |
| /* Height */ |
| bytestream_put_le16(&enc->out_buf, enc->common.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, AVPacket *pkt, |
| const AVFrame *frame, int *got_packet) |
| { |
| RoqEncContext *const enc = avctx->priv_data; |
| RoqContext *const roq = &enc->common; |
| int size, ret; |
| |
| roq->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 */ |
| size = ((roq->width * roq->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8; |
| if ((ret = ff_alloc_packet2(avctx, pkt, size, 0)) < 0) |
| return ret; |
| enc->out_buf = pkt->data; |
| |
| /* 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 ((ret = ff_get_buffer(avctx, roq->current_frame, 0)) < 0 || |
| (ret = ff_get_buffer(avctx, roq->last_frame, 0)) < 0) |
| return ret; |
| |
| /* Before the first video frame, write a "video info" chunk */ |
| roq_write_video_info_chunk(enc); |
| |
| enc->first_frame = 0; |
| } |
| |
| /* Encode the actual frame */ |
| ret = roq_encode_video(enc); |
| if (ret < 0) |
| return ret; |
| |
| pkt->size = enc->out_buf - pkt->data; |
| if (enc->framesSinceKeyframe == 1) |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| *got_packet = 1; |
| |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(RoqEncContext, x) |
| #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "quake3_compat", "Whether to respect known limitations in Quake 3 decoder", OFFSET(quake3_compat), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE }, |
| { NULL }, |
| }; |
| |
| static const AVClass roq_class = { |
| .class_name = "RoQ", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVCodec ff_roq_encoder = { |
| .name = "roqvideo", |
| .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_ROQ, |
| .priv_data_size = sizeof(RoqEncContext), |
| .init = roq_encode_init, |
| .encode2 = roq_encode_frame, |
| .close = roq_encode_end, |
| .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ444P, |
| AV_PIX_FMT_NONE }, |
| .priv_class = &roq_class, |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
| }; |
