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FFmpeg/libavcodec/dnxhdenc.c

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  1. /*

  2.  * VC3/DNxHD encoder

  3.  * Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>

  4.  *

  5.  * VC-3 encoder funded by the British Broadcasting Corporation

  6.  *

  7.  * This file is part of FFmpeg.

  8.  *

  9.  * FFmpeg is free software; you can redistribute it and/or

  10.  * modify it under the terms of the GNU Lesser General Public

  11.  * License as published by the Free Software Foundation; either

  12.  * version 2.1 of the License, or (at your option) any later version.

  13.  *

  14.  * FFmpeg is distributed in the hope that it will be useful,

  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  17.  * Lesser General Public License for more details.

  18.  *

  19.  * You should have received a copy of the GNU Lesser General Public

  20.  * License along with FFmpeg; if not, write to the Free Software

  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  22.  */

  23. 

  24. //#define DEBUG

  25. #define RC_VARIANCE 1 // use variance or ssd for fast rc

  26. 

  27. #include "avcodec.h"

  28. #include "dsputil.h"

  29. #include "mpegvideo.h"

  30. #include "dnxhdenc.h"

  31. 

  32. int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);

  33. 

  34. #define LAMBDA_FRAC_BITS 10

  35. 

  36. static av_always_inline void dnxhd_get_pixels_8x4(DCTELEM *restrict block, const uint8_t *pixels, int line_size)

  37. {

  38.     int i;

  39.     for (i = 0; i < 4; i++) {

  40.         block[0] = pixels[0]; block[1] = pixels[1];

  41.         block[2] = pixels[2]; block[3] = pixels[3];

  42.         block[4] = pixels[4]; block[5] = pixels[5];

  43.         block[6] = pixels[6]; block[7] = pixels[7];

  44.         pixels += line_size;

  45.         block += 8;

  46.     }

  47.     memcpy(block   , block- 8, sizeof(*block)*8);

  48.     memcpy(block+ 8, block-16, sizeof(*block)*8);

  49.     memcpy(block+16, block-24, sizeof(*block)*8);

  50.     memcpy(block+24, block-32, sizeof(*block)*8);

  51. }

  52. 

  53. static int dnxhd_init_vlc(DNXHDEncContext *ctx)

  54. {

  55.     int i, j, level, run;

  56.     int max_level = 1<<(ctx->cid_table->bit_depth+2);

  57. 

  58.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->vlc_codes, max_level*4*sizeof(*ctx->vlc_codes), fail);

  59.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->vlc_bits , max_level*4*sizeof(*ctx->vlc_bits ), fail);

  60.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->run_codes, 63*2                               , fail);

  61.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->run_bits , 63                                 , fail);

  62. 

  63.     ctx->vlc_codes += max_level*2;

  64.     ctx->vlc_bits  += max_level*2;

  65.     for (level = -max_level; level < max_level; level++) {

  66.         for (run = 0; run < 2; run++) {

  67.             int index = (level<<1)|run;

  68.             int sign, offset = 0, alevel = level;

  69. 

  70.             MASK_ABS(sign, alevel);

  71.             if (alevel > 64) {

  72.                 offset = (alevel-1)>>6;

  73.                 alevel -= offset<<6;

  74.             }

  75.             for (j = 0; j < 257; j++) {

  76.                 if (ctx->cid_table->ac_level[j] == alevel &&

  77.                     (!offset || (ctx->cid_table->ac_index_flag[j] && offset)) &&

  78.                     (!run    || (ctx->cid_table->ac_run_flag  [j] && run))) {

  79.                     assert(!ctx->vlc_codes[index]);

  80.                     if (alevel) {

  81.                         ctx->vlc_codes[index] = (ctx->cid_table->ac_codes[j]<<1)|(sign&1);

  82.                         ctx->vlc_bits [index] = ctx->cid_table->ac_bits[j]+1;

  83.                     } else {

  84.                         ctx->vlc_codes[index] = ctx->cid_table->ac_codes[j];

  85.                         ctx->vlc_bits [index] = ctx->cid_table->ac_bits [j];

  86.                     }

  87.                     break;

  88.                 }

  89.             }

  90.             assert(!alevel || j < 257);

  91.             if (offset) {

  92.                 ctx->vlc_codes[index] = (ctx->vlc_codes[index]<<ctx->cid_table->index_bits)|offset;

  93.                 ctx->vlc_bits [index]+= ctx->cid_table->index_bits;

  94.             }

  95.         }

  96.     }

  97.     for (i = 0; i < 62; i++) {

  98.         int run = ctx->cid_table->run[i];

  99.         assert(run < 63);

  100.         ctx->run_codes[run] = ctx->cid_table->run_codes[i];

  101.         ctx->run_bits [run] = ctx->cid_table->run_bits[i];

  102.     }

  103.     return 0;

  104.  fail:

  105.     return -1;

  106. }

  107. 

  108. static int dnxhd_init_qmat(DNXHDEncContext *ctx, int lbias, int cbias)

  109. {

  110.     // init first elem to 1 to avoid div by 0 in convert_matrix

  111.     uint16_t weight_matrix[64] = {1,}; // convert_matrix needs uint16_t*

  112.     int qscale, i;

  113. 

  114.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_l,   (ctx->m.avctx->qmax+1) * 64 *     sizeof(int)     , fail);

  115.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_c,   (ctx->m.avctx->qmax+1) * 64 *     sizeof(int)     , fail);

  116.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t), fail);

  117.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t), fail);

  118. 

  119.     for (i = 1; i < 64; i++) {

  120.         int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];

  121.         weight_matrix[j] = ctx->cid_table->luma_weight[i];

  122.     }

  123.     ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_l, ctx->qmatrix_l16, weight_matrix,

  124.                       ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);

  125.     for (i = 1; i < 64; i++) {

  126.         int j = ctx->m.dsp.idct_permutation[ff_zigzag_direct[i]];

  127.         weight_matrix[j] = ctx->cid_table->chroma_weight[i];

  128.     }

  129.     ff_convert_matrix(&ctx->m.dsp, ctx->qmatrix_c, ctx->qmatrix_c16, weight_matrix,

  130.                       ctx->m.intra_quant_bias, 1, ctx->m.avctx->qmax, 1);

  131.     for (qscale = 1; qscale <= ctx->m.avctx->qmax; qscale++) {

  132.         for (i = 0; i < 64; i++) {

  133.             ctx->qmatrix_l  [qscale]   [i] <<= 2; ctx->qmatrix_c  [qscale]   [i] <<= 2;

  134.             ctx->qmatrix_l16[qscale][0][i] <<= 2; ctx->qmatrix_l16[qscale][1][i] <<= 2;

  135.             ctx->qmatrix_c16[qscale][0][i] <<= 2; ctx->qmatrix_c16[qscale][1][i] <<= 2;

  136.         }

  137.     }

  138.     return 0;

  139.  fail:

  140.     return -1;

  141. }

  142. 

  143. static int dnxhd_init_rc(DNXHDEncContext *ctx)

  144. {

  145.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry), fail);

  146.     if (ctx->m.avctx->mb_decision != FF_MB_DECISION_RD)

  147.         FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry), fail);

  148. 

  149.     ctx->frame_bits = (ctx->cid_table->coding_unit_size - 640 - 4) * 8;

  150.     ctx->qscale = 1;

  151.     ctx->lambda = 2<<LAMBDA_FRAC_BITS; // qscale 2

  152.     return 0;

  153.  fail:

  154.     return -1;

  155. }

  156. 

  157. static int dnxhd_encode_init(AVCodecContext *avctx)

  158. {

  159.     DNXHDEncContext *ctx = avctx->priv_data;

  160.     int i, index;

  161. 

  162.     ctx->cid = ff_dnxhd_find_cid(avctx);

  163.     if (!ctx->cid || avctx->pix_fmt != PIX_FMT_YUV422P) {

  164.         av_log(avctx, AV_LOG_ERROR, "video parameters incompatible with DNxHD\n");

  165.         return -1;

  166.     }

  167.     av_log(avctx, AV_LOG_DEBUG, "cid %d\n", ctx->cid);

  168. 

  169.     index = ff_dnxhd_get_cid_table(ctx->cid);

  170.     ctx->cid_table = &ff_dnxhd_cid_table[index];

  171. 

  172.     ctx->m.avctx = avctx;

  173.     ctx->m.mb_intra = 1;

  174.     ctx->m.h263_aic = 1;

  175. 

  176.     ctx->get_pixels_8x4_sym = dnxhd_get_pixels_8x4;

  177. 

  178.     dsputil_init(&ctx->m.dsp, avctx);

  179.     ff_dct_common_init(&ctx->m);

  180. #if HAVE_MMX

  181.     ff_dnxhd_init_mmx(ctx);

  182. #endif

  183.     if (!ctx->m.dct_quantize)

  184.         ctx->m.dct_quantize = dct_quantize_c;

  185. 

  186.     ctx->m.mb_height = (avctx->height + 15) / 16;

  187.     ctx->m.mb_width  = (avctx->width  + 15) / 16;

  188. 

  189.     if (avctx->flags & CODEC_FLAG_INTERLACED_DCT) {

  190.         ctx->interlaced = 1;

  191.         ctx->m.mb_height /= 2;

  192.     }

  193. 

  194.     ctx->m.mb_num = ctx->m.mb_height * ctx->m.mb_width;

  195. 

  196.     if (avctx->intra_quant_bias != FF_DEFAULT_QUANT_BIAS)

  197.         ctx->m.intra_quant_bias = avctx->intra_quant_bias;

  198.     if (dnxhd_init_qmat(ctx, ctx->m.intra_quant_bias, 0) < 0) // XXX tune lbias/cbias

  199.         return -1;

  200. 

  201.     if (dnxhd_init_vlc(ctx) < 0)

  202.         return -1;

  203.     if (dnxhd_init_rc(ctx) < 0)

  204.         return -1;

  205. 

  206.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t), fail);

  207.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->slice_offs, ctx->m.mb_height*sizeof(uint32_t), fail);

  208.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_bits,    ctx->m.mb_num   *sizeof(uint16_t), fail);

  209.     FF_ALLOCZ_OR_GOTO(ctx->m.avctx, ctx->mb_qscale,  ctx->m.mb_num   *sizeof(uint8_t) , fail);

  210. 

  211.     ctx->frame.key_frame = 1;

  212.     ctx->frame.pict_type = FF_I_TYPE;

  213.     ctx->m.avctx->coded_frame = &ctx->frame;

  214. 

  215.     if (avctx->thread_count > MAX_THREADS) {

  216.         av_log(avctx, AV_LOG_ERROR, "too many threads\n");

  217.         return -1;

  218.     }

  219. 

  220.     ctx->thread[0] = ctx;

  221.     for (i = 1; i < avctx->thread_count; i++) {

  222.         ctx->thread[i] =  av_malloc(sizeof(DNXHDEncContext));

  223.         memcpy(ctx->thread[i], ctx, sizeof(DNXHDEncContext));

  224.     }

  225. 

  226.     return 0;

  227.  fail: //for FF_ALLOCZ_OR_GOTO

  228.     return -1;

  229. }

  230. 

  231. static int dnxhd_write_header(AVCodecContext *avctx, uint8_t *buf)

  232. {

  233.     DNXHDEncContext *ctx = avctx->priv_data;

  234.     const uint8_t header_prefix[5] = { 0x00,0x00,0x02,0x80,0x01 };

  235. 

  236.     memset(buf, 0, 640);

  237. 

  238.     memcpy(buf, header_prefix, 5);

  239.     buf[5] = ctx->interlaced ? ctx->cur_field+2 : 0x01;

  240.     buf[6] = 0x80; // crc flag off

  241.     buf[7] = 0xa0; // reserved

  242.     AV_WB16(buf + 0x18, avctx->height); // ALPF

  243.     AV_WB16(buf + 0x1a, avctx->width);  // SPL

  244.     AV_WB16(buf + 0x1d, avctx->height); // NAL

  245. 

  246.     buf[0x21] = 0x38; // FIXME 8 bit per comp

  247.     buf[0x22] = 0x88 + (ctx->frame.interlaced_frame<<2);

  248.     AV_WB32(buf + 0x28, ctx->cid); // CID

  249.     buf[0x2c] = ctx->interlaced ? 0 : 0x80;

  250. 

  251.     buf[0x5f] = 0x01; // UDL

  252. 

  253.     buf[0x167] = 0x02; // reserved

  254.     AV_WB16(buf + 0x16a, ctx->m.mb_height * 4 + 4); // MSIPS

  255.     buf[0x16d] = ctx->m.mb_height; // Ns

  256.     buf[0x16f] = 0x10; // reserved

  257. 

  258.     ctx->msip = buf + 0x170;

  259.     return 0;

  260. }

  261. 

  262. static av_always_inline void dnxhd_encode_dc(DNXHDEncContext *ctx, int diff)

  263. {

  264.     int nbits;

  265.     if (diff < 0) {

  266.         nbits = av_log2_16bit(-2*diff);

  267.         diff--;

  268.     } else {

  269.         nbits = av_log2_16bit(2*diff);

  270.     }

  271.     put_bits(&ctx->m.pb, ctx->cid_table->dc_bits[nbits] + nbits,

  272.              (ctx->cid_table->dc_codes[nbits]<<nbits) + (diff & ((1 << nbits) - 1)));

  273. }

  274. 

  275. static av_always_inline void dnxhd_encode_block(DNXHDEncContext *ctx, DCTELEM *block, int last_index, int n)

  276. {

  277.     int last_non_zero = 0;

  278.     int slevel, i, j;

  279. 

  280.     dnxhd_encode_dc(ctx, block[0] - ctx->m.last_dc[n]);

  281.     ctx->m.last_dc[n] = block[0];

  282. 

  283.     for (i = 1; i <= last_index; i++) {

  284.         j = ctx->m.intra_scantable.permutated[i];

  285.         slevel = block[j];

  286.         if (slevel) {

  287.             int run_level = i - last_non_zero - 1;

  288.             int rlevel = (slevel<<1)|!!run_level;

  289.             put_bits(&ctx->m.pb, ctx->vlc_bits[rlevel], ctx->vlc_codes[rlevel]);

  290.             if (run_level)

  291.                 put_bits(&ctx->m.pb, ctx->run_bits[run_level], ctx->run_codes[run_level]);

  292.             last_non_zero = i;

  293.         }

  294.     }

  295.     put_bits(&ctx->m.pb, ctx->vlc_bits[0], ctx->vlc_codes[0]); // EOB

  296. }

  297. 

  298. static av_always_inline void dnxhd_unquantize_c(DNXHDEncContext *ctx, DCTELEM *block, int n, int qscale, int last_index)

  299. {

  300.     const uint8_t *weight_matrix;

  301.     int level;

  302.     int i;

  303. 

  304.     weight_matrix = (n&2) ? ctx->cid_table->chroma_weight : ctx->cid_table->luma_weight;

  305. 

  306.     for (i = 1; i <= last_index; i++) {

  307.         int j = ctx->m.intra_scantable.permutated[i];

  308.         level = block[j];

  309.         if (level) {

  310.             if (level < 0) {

  311.                 level = (1-2*level) * qscale * weight_matrix[i];

  312.                 if (weight_matrix[i] != 32)

  313.                     level += 32;

  314.                 level >>= 6;

  315.                 level = -level;

  316.             } else {

  317.                 level = (2*level+1) * qscale * weight_matrix[i];

  318.                 if (weight_matrix[i] != 32)

  319.                     level += 32;

  320.                 level >>= 6;

  321.             }

  322.             block[j] = level;

  323.         }

  324.     }

  325. }

  326. 

  327. static av_always_inline int dnxhd_ssd_block(DCTELEM *qblock, DCTELEM *block)

  328. {

  329.     int score = 0;

  330.     int i;

  331.     for (i = 0; i < 64; i++)

  332.         score += (block[i]-qblock[i])*(block[i]-qblock[i]);

  333.     return score;

  334. }

  335. 

  336. static av_always_inline int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, DCTELEM *block, int last_index)

  337. {

  338.     int last_non_zero = 0;

  339.     int bits = 0;

  340.     int i, j, level;

  341.     for (i = 1; i <= last_index; i++) {

  342.         j = ctx->m.intra_scantable.permutated[i];

  343.         level = block[j];

  344.         if (level) {

  345.             int run_level = i - last_non_zero - 1;

  346.             bits += ctx->vlc_bits[(level<<1)|!!run_level]+ctx->run_bits[run_level];

  347.             last_non_zero = i;

  348.         }

  349.     }

  350.     return bits;

  351. }

  352. 

  353. static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)

  354. {

  355.     const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize)   + (mb_x << 4);

  356.     const uint8_t *ptr_u = ctx->thread[0]->src[1] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);

  357.     const uint8_t *ptr_v = ctx->thread[0]->src[2] + ((mb_y << 4) * ctx->m.uvlinesize) + (mb_x << 3);

  358.     DSPContext *dsp = &ctx->m.dsp;

  359. 

  360.     dsp->get_pixels(ctx->blocks[0], ptr_y    , ctx->m.linesize);

  361.     dsp->get_pixels(ctx->blocks[1], ptr_y + 8, ctx->m.linesize);

  362.     dsp->get_pixels(ctx->blocks[2], ptr_u    , ctx->m.uvlinesize);

  363.     dsp->get_pixels(ctx->blocks[3], ptr_v    , ctx->m.uvlinesize);

  364. 

  365.     if (mb_y+1 == ctx->m.mb_height && ctx->m.avctx->height == 1080) {

  366.         if (ctx->interlaced) {

  367.             ctx->get_pixels_8x4_sym(ctx->blocks[4], ptr_y + ctx->dct_y_offset    , ctx->m.linesize);

  368.             ctx->get_pixels_8x4_sym(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);

  369.             ctx->get_pixels_8x4_sym(ctx->blocks[6], ptr_u + ctx->dct_uv_offset   , ctx->m.uvlinesize);

  370.             ctx->get_pixels_8x4_sym(ctx->blocks[7], ptr_v + ctx->dct_uv_offset   , ctx->m.uvlinesize);

  371.         } else {

  372.             dsp->clear_block(ctx->blocks[4]); dsp->clear_block(ctx->blocks[5]);

  373.             dsp->clear_block(ctx->blocks[6]); dsp->clear_block(ctx->blocks[7]);

  374.         }

  375.     } else {

  376.         dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset    , ctx->m.linesize);

  377.         dsp->get_pixels(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);

  378.         dsp->get_pixels(ctx->blocks[6], ptr_u + ctx->dct_uv_offset   , ctx->m.uvlinesize);

  379.         dsp->get_pixels(ctx->blocks[7], ptr_v + ctx->dct_uv_offset   , ctx->m.uvlinesize);

  380.     }

  381. }

  382. 

  383. static av_always_inline int dnxhd_switch_matrix(DNXHDEncContext *ctx, int i)

  384. {

  385.     if (i&2) {

  386.         ctx->m.q_intra_matrix16 = ctx->qmatrix_c16;

  387.         ctx->m.q_intra_matrix   = ctx->qmatrix_c;

  388.         return 1 + (i&1);

  389.     } else {

  390.         ctx->m.q_intra_matrix16 = ctx->qmatrix_l16;

  391.         ctx->m.q_intra_matrix   = ctx->qmatrix_l;

  392.         return 0;

  393.     }

  394. }

  395. 

  396. static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)

  397. {

  398.     DNXHDEncContext *ctx = avctx->priv_data;

  399.     int mb_y = jobnr, mb_x;

  400.     int qscale = ctx->qscale;

  401.     ctx = ctx->thread[threadnr];

  402. 

  403.     ctx->m.last_dc[0] =

  404.     ctx->m.last_dc[1] =

  405.     ctx->m.last_dc[2] = 1024;

  406. 

  407.     for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {

  408.         unsigned mb = mb_y * ctx->m.mb_width + mb_x;

  409.         int ssd     = 0;

  410.         int ac_bits = 0;

  411.         int dc_bits = 0;

  412.         int i;

  413. 

  414.         dnxhd_get_blocks(ctx, mb_x, mb_y);

  415. 

  416.         for (i = 0; i < 8; i++) {

  417.             DECLARE_ALIGNED_16(DCTELEM, block)[64];

  418.             DCTELEM *src_block = ctx->blocks[i];

  419.             int overflow, nbits, diff, last_index;

  420.             int n = dnxhd_switch_matrix(ctx, i);

  421. 

  422.             memcpy(block, src_block, sizeof(block));

  423.             last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);

  424.             ac_bits += dnxhd_calc_ac_bits(ctx, block, last_index);

  425. 

  426.             diff = block[0] - ctx->m.last_dc[n];

  427.             if (diff < 0) nbits = av_log2_16bit(-2*diff);

  428.             else          nbits = av_log2_16bit( 2*diff);

  429.             dc_bits += ctx->cid_table->dc_bits[nbits] + nbits;

  430. 

  431.             ctx->m.last_dc[n] = block[0];

  432. 

  433.             if (avctx->mb_decision == FF_MB_DECISION_RD || !RC_VARIANCE) {

  434.                 dnxhd_unquantize_c(ctx, block, i, qscale, last_index);

  435.                 ctx->m.dsp.idct(block);

  436.                 ssd += dnxhd_ssd_block(block, src_block);

  437.             }

  438.         }

  439.         ctx->mb_rc[qscale][mb].ssd = ssd;

  440.         ctx->mb_rc[qscale][mb].bits = ac_bits+dc_bits+12+8*ctx->vlc_bits[0];

  441.     }

  442.     return 0;

  443. }

  444. 

  445. static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)

  446. {

  447.     DNXHDEncContext *ctx = avctx->priv_data;

  448.     int mb_y = jobnr, mb_x;

  449.     ctx = ctx->thread[threadnr];

  450.     init_put_bits(&ctx->m.pb, (uint8_t *)arg + 640 + ctx->slice_offs[jobnr], ctx->slice_size[jobnr]);

  451. 

  452.     ctx->m.last_dc[0] =

  453.     ctx->m.last_dc[1] =

  454.     ctx->m.last_dc[2] = 1024;

  455.     for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {

  456.         unsigned mb = mb_y * ctx->m.mb_width + mb_x;

  457.         int qscale = ctx->mb_qscale[mb];

  458.         int i;

  459. 

  460.         put_bits(&ctx->m.pb, 12, qscale<<1);

  461. 

  462.         dnxhd_get_blocks(ctx, mb_x, mb_y);

  463. 

  464.         for (i = 0; i < 8; i++) {

  465.             DCTELEM *block = ctx->blocks[i];

  466.             int last_index, overflow;

  467.             int n = dnxhd_switch_matrix(ctx, i);

  468.             last_index = ctx->m.dct_quantize((MpegEncContext*)ctx, block, i, qscale, &overflow);

  469.             //START_TIMER;

  470.             dnxhd_encode_block(ctx, block, last_index, n);

  471.             //STOP_TIMER("encode_block");

  472.         }

  473.     }

  474.     if (put_bits_count(&ctx->m.pb)&31)

  475.         put_bits(&ctx->m.pb, 32-(put_bits_count(&ctx->m.pb)&31), 0);

  476.     flush_put_bits(&ctx->m.pb);

  477.     return 0;

  478. }

  479. 

  480. static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx)

  481. {

  482.     int mb_y, mb_x;

  483.     int offset = 0;

  484.     for (mb_y = 0; mb_y < ctx->m.mb_height; mb_y++) {

  485.         int thread_size;

  486.         ctx->slice_offs[mb_y] = offset;

  487.             ctx->slice_size[mb_y] = 0;

  488.             for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {

  489.                 unsigned mb = mb_y * ctx->m.mb_width + mb_x;

  490.                 ctx->slice_size[mb_y] += ctx->mb_bits[mb];

  491.             }

  492.             ctx->slice_size[mb_y] = (ctx->slice_size[mb_y]+31)&~31;

  493.             ctx->slice_size[mb_y] >>= 3;

  494.             thread_size = ctx->slice_size[mb_y];

  495.         offset += thread_size;

  496.     }

  497. }

  498. 

  499. static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)

  500. {

  501.     DNXHDEncContext *ctx = avctx->priv_data;

  502.     int mb_y = jobnr, mb_x;

  503.     ctx = ctx->thread[threadnr];

  504.     for (mb_x = 0; mb_x < ctx->m.mb_width; mb_x++) {

  505.         unsigned mb  = mb_y * ctx->m.mb_width + mb_x;

  506.         uint8_t *pix = ctx->thread[0]->src[0] + ((mb_y<<4) * ctx->m.linesize) + (mb_x<<4);

  507.         int sum      = ctx->m.dsp.pix_sum(pix, ctx->m.linesize);

  508.         int varc     = (ctx->m.dsp.pix_norm1(pix, ctx->m.linesize) - (((unsigned)(sum*sum))>>8)+128)>>8;

  509.         ctx->mb_cmp[mb].value = varc;

  510.         ctx->mb_cmp[mb].mb = mb;

  511.     }

  512.     return 0;

  513. }

  514. 

  515. static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)

  516. {

  517.     int lambda, up_step, down_step;

  518.     int last_lower = INT_MAX, last_higher = 0;

  519.     int x, y, q;

  520. 

  521.     for (q = 1; q < avctx->qmax; q++) {

  522.         ctx->qscale = q;

  523.         avctx->execute2(avctx, dnxhd_calc_bits_thread, NULL, NULL, ctx->m.mb_height);

  524.     }

  525.     up_step = down_step = 2<<LAMBDA_FRAC_BITS;

  526.     lambda = ctx->lambda;

  527. 

  528.     for (;;) {

  529.         int bits = 0;

  530.         int end = 0;

  531.         if (lambda == last_higher) {

  532.             lambda++;

  533.             end = 1; // need to set final qscales/bits

  534.         }

  535.         for (y = 0; y < ctx->m.mb_height; y++) {

  536.             for (x = 0; x < ctx->m.mb_width; x++) {

  537.                 unsigned min = UINT_MAX;

  538.                 int qscale = 1;

  539.                 int mb = y*ctx->m.mb_width+x;

  540.                 for (q = 1; q < avctx->qmax; q++) {

  541.                     unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);

  542.                     if (score < min) {

  543.                         min = score;

  544.                         qscale = q;

  545.                     }

  546.                 }

  547.                 bits += ctx->mb_rc[qscale][mb].bits;

  548.                 ctx->mb_qscale[mb] = qscale;

  549.                 ctx->mb_bits[mb] = ctx->mb_rc[qscale][mb].bits;

  550.             }

  551.             bits = (bits+31)&~31; // padding

  552.             if (bits > ctx->frame_bits)

  553.                 break;

  554.         }

  555.         //dprintf(ctx->m.avctx, "lambda %d, up %u, down %u, bits %d, frame %d\n",

  556.         //        lambda, last_higher, last_lower, bits, ctx->frame_bits);

  557.         if (end) {

  558.             if (bits > ctx->frame_bits)

  559.                 return -1;

  560.             break;

  561.         }

  562.         if (bits < ctx->frame_bits) {

  563.             last_lower = FFMIN(lambda, last_lower);

  564.             if (last_higher != 0)

  565.                 lambda = (lambda+last_higher)>>1;

  566.             else

  567.                 lambda -= down_step;

  568.             down_step *= 5; // XXX tune ?

  569.             up_step = 1<<LAMBDA_FRAC_BITS;

  570.             lambda = FFMAX(1, lambda);

  571.             if (lambda == last_lower)

  572.                 break;

  573.         } else {

  574.             last_higher = FFMAX(lambda, last_higher);

  575.             if (last_lower != INT_MAX)

  576.                 lambda = (lambda+last_lower)>>1;

  577.             else if ((int64_t)lambda + up_step > INT_MAX)

  578.                 return -1;

  579.             else

  580.                 lambda += up_step;

  581.             up_step = FFMIN((int64_t)up_step*5, INT_MAX);

  582.             down_step = 1<<LAMBDA_FRAC_BITS;

  583.         }

  584.     }

  585.     //dprintf(ctx->m.avctx, "out lambda %d\n", lambda);

  586.     ctx->lambda = lambda;

  587.     return 0;

  588. }

  589. 

  590. static int dnxhd_find_qscale(DNXHDEncContext *ctx)

  591. {

  592.     int bits = 0;

  593.     int up_step = 1;

  594.     int down_step = 1;

  595.     int last_higher = 0;

  596.     int last_lower = INT_MAX;

  597.     int qscale;

  598.     int x, y;

  599. 

  600.     qscale = ctx->qscale;

  601.     for (;;) {

  602.         bits = 0;

  603.         ctx->qscale = qscale;

  604.         // XXX avoid recalculating bits

  605.         ctx->m.avctx->execute2(ctx->m.avctx, dnxhd_calc_bits_thread, NULL, NULL, ctx->m.mb_height);

  606.         for (y = 0; y < ctx->m.mb_height; y++) {

  607.             for (x = 0; x < ctx->m.mb_width; x++)

  608.                 bits += ctx->mb_rc[qscale][y*ctx->m.mb_width+x].bits;

  609.             bits = (bits+31)&~31; // padding

  610.             if (bits > ctx->frame_bits)

  611.                 break;

  612.         }

  613.         //dprintf(ctx->m.avctx, "%d, qscale %d, bits %d, frame %d, higher %d, lower %d\n",

  614.         //        ctx->m.avctx->frame_number, qscale, bits, ctx->frame_bits, last_higher, last_lower);

  615.         if (bits < ctx->frame_bits) {

  616.             if (qscale == 1)

  617.                 return 1;

  618.             if (last_higher == qscale - 1) {

  619.                 qscale = last_higher;

  620.                 break;

  621.             }

  622.             last_lower = FFMIN(qscale, last_lower);

  623.             if (last_higher != 0)

  624.                 qscale = (qscale+last_higher)>>1;

  625.             else

  626.                 qscale -= down_step++;

  627.             if (qscale < 1)

  628.                 qscale = 1;

  629.             up_step = 1;

  630.         } else {

  631.             if (last_lower == qscale + 1)

  632.                 break;

  633.             last_higher = FFMAX(qscale, last_higher);

  634.             if (last_lower != INT_MAX)

  635.                 qscale = (qscale+last_lower)>>1;

  636.             else

  637.                 qscale += up_step++;

  638.             down_step = 1;

  639.             if (qscale >= ctx->m.avctx->qmax)

  640.                 return -1;

  641.         }

  642.     }

  643.     //dprintf(ctx->m.avctx, "out qscale %d\n", qscale);

  644.     ctx->qscale = qscale;

  645.     return 0;

  646. }

  647. 

  648. #define BUCKET_BITS 8

  649. #define RADIX_PASSES 4

  650. #define NBUCKETS (1 << BUCKET_BITS)

  651. 

  652. static inline int get_bucket(int value, int shift)

  653. {

  654.     value >>= shift;

  655.     value &= NBUCKETS - 1;

  656.     return NBUCKETS - 1 - value;

  657. }

  658. 

  659. static void radix_count(const RCCMPEntry *data, int size, int buckets[RADIX_PASSES][NBUCKETS])

  660. {

  661.     int i, j;

  662.     memset(buckets, 0, sizeof(buckets[0][0]) * RADIX_PASSES * NBUCKETS);

  663.     for (i = 0; i < size; i++) {

  664.         int v = data[i].value;

  665.         for (j = 0; j < RADIX_PASSES; j++) {

  666.             buckets[j][get_bucket(v, 0)]++;

  667.             v >>= BUCKET_BITS;

  668.         }

  669.         assert(!v);

  670.     }

  671.     for (j = 0; j < RADIX_PASSES; j++) {

  672.         int offset = size;

  673.         for (i = NBUCKETS - 1; i >= 0; i--)

  674.             buckets[j][i] = offset -= buckets[j][i];

  675.         assert(!buckets[j][0]);

  676.     }

  677. }

  678. 

  679. static void radix_sort_pass(RCCMPEntry *dst, const RCCMPEntry *data, int size, int buckets[NBUCKETS], int pass)

  680. {

  681.     int shift = pass * BUCKET_BITS;

  682.     int i;

  683.     for (i = 0; i < size; i++) {

  684.         int v = get_bucket(data[i].value, shift);

  685.         int pos = buckets[v]++;

  686.         dst[pos] = data[i];

  687.     }

  688. }

  689. 

  690. static void radix_sort(RCCMPEntry *data, int size)

  691. {

  692.     int buckets[RADIX_PASSES][NBUCKETS];

  693.     RCCMPEntry *tmp = av_malloc(sizeof(*tmp) * size);

  694.     radix_count(data, size, buckets);

  695.     radix_sort_pass(tmp, data, size, buckets[0], 0);

  696.     radix_sort_pass(data, tmp, size, buckets[1], 1);

  697.     if (buckets[2][NBUCKETS - 1] || buckets[3][NBUCKETS - 1]) {

  698.         radix_sort_pass(tmp, data, size, buckets[2], 2);

  699.         radix_sort_pass(data, tmp, size, buckets[3], 3);

  700.     }

  701.     av_free(tmp);

  702. }

  703. 

  704. static int dnxhd_encode_fast(AVCodecContext *avctx, DNXHDEncContext *ctx)

  705. {

  706.     int max_bits = 0;

  707.     int ret, x, y;

  708.     if ((ret = dnxhd_find_qscale(ctx)) < 0)

  709.         return -1;

  710.     for (y = 0; y < ctx->m.mb_height; y++) {

  711.         for (x = 0; x < ctx->m.mb_width; x++) {

  712.             int mb = y*ctx->m.mb_width+x;

  713.             int delta_bits;

  714.             ctx->mb_qscale[mb] = ctx->qscale;

  715.             ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale][mb].bits;

  716.             max_bits += ctx->mb_rc[ctx->qscale][mb].bits;

  717.             if (!RC_VARIANCE) {

  718.                 delta_bits = ctx->mb_rc[ctx->qscale][mb].bits-ctx->mb_rc[ctx->qscale+1][mb].bits;

  719.                 ctx->mb_cmp[mb].mb = mb;

  720.                 ctx->mb_cmp[mb].value = delta_bits ?

  721.                     ((ctx->mb_rc[ctx->qscale][mb].ssd-ctx->mb_rc[ctx->qscale+1][mb].ssd)*100)/delta_bits

  722.                     : INT_MIN; //avoid increasing qscale

  723.             }

  724.         }

  725.         max_bits += 31; //worst padding

  726.     }

  727.     if (!ret) {

  728.         if (RC_VARIANCE)

  729.             avctx->execute2(avctx, dnxhd_mb_var_thread, NULL, NULL, ctx->m.mb_height);

  730.         radix_sort(ctx->mb_cmp, ctx->m.mb_num);

  731.         for (x = 0; x < ctx->m.mb_num && max_bits > ctx->frame_bits; x++) {

  732.             int mb = ctx->mb_cmp[x].mb;

  733.             max_bits -= ctx->mb_rc[ctx->qscale][mb].bits - ctx->mb_rc[ctx->qscale+1][mb].bits;

  734.             ctx->mb_qscale[mb] = ctx->qscale+1;

  735.             ctx->mb_bits[mb] = ctx->mb_rc[ctx->qscale+1][mb].bits;

  736.         }

  737.     }

  738.     return 0;

  739. }

  740. 

  741. static void dnxhd_load_picture(DNXHDEncContext *ctx, const AVFrame *frame)

  742. {

  743.     int i;

  744. 

  745.     for (i = 0; i < 3; i++) {

  746.         ctx->frame.data[i]     = frame->data[i];

  747.         ctx->frame.linesize[i] = frame->linesize[i];

  748.     }

  749. 

  750.     for (i = 0; i < ctx->m.avctx->thread_count; i++) {

  751.         ctx->thread[i]->m.linesize    = ctx->frame.linesize[0]<<ctx->interlaced;

  752.         ctx->thread[i]->m.uvlinesize  = ctx->frame.linesize[1]<<ctx->interlaced;

  753.         ctx->thread[i]->dct_y_offset  = ctx->m.linesize  *8;

  754.         ctx->thread[i]->dct_uv_offset = ctx->m.uvlinesize*8;

  755.     }

  756. 

  757.     ctx->frame.interlaced_frame = frame->interlaced_frame;

  758.     ctx->cur_field = frame->interlaced_frame && !frame->top_field_first;

  759. }

  760. 

  761. static int dnxhd_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)

  762. {

  763.     DNXHDEncContext *ctx = avctx->priv_data;

  764.     int first_field = 1;

  765.     int offset, i, ret;

  766. 

  767.     if (buf_size < ctx->cid_table->frame_size) {

  768.         av_log(avctx, AV_LOG_ERROR, "output buffer is too small to compress picture\n");

  769.         return -1;

  770.     }

  771. 

  772.     dnxhd_load_picture(ctx, data);

  773. 

  774.  encode_coding_unit:

  775.     for (i = 0; i < 3; i++) {

  776.         ctx->src[i] = ctx->frame.data[i];

  777.         if (ctx->interlaced && ctx->cur_field)

  778.             ctx->src[i] += ctx->frame.linesize[i];

  779.     }

  780. 

  781.     dnxhd_write_header(avctx, buf);

  782. 

  783.     if (avctx->mb_decision == FF_MB_DECISION_RD)

  784.         ret = dnxhd_encode_rdo(avctx, ctx);

  785.     else

  786.         ret = dnxhd_encode_fast(avctx, ctx);

  787.     if (ret < 0) {

  788.         av_log(avctx, AV_LOG_ERROR,

  789.                "picture could not fit ratecontrol constraints, increase qmax\n");

  790.         return -1;

  791.     }

  792. 

  793.     dnxhd_setup_threads_slices(ctx);

  794. 

  795.     offset = 0;

  796.     for (i = 0; i < ctx->m.mb_height; i++) {

  797.         AV_WB32(ctx->msip + i * 4, offset);

  798.         offset += ctx->slice_size[i];

  799.         assert(!(ctx->slice_size[i] & 3));

  800.     }

  801. 

  802.     avctx->execute2(avctx, dnxhd_encode_thread, buf, NULL, ctx->m.mb_height);

  803. 

  804.     assert(640 + offset + 4 <= ctx->cid_table->coding_unit_size);

  805.     memset(buf + 640 + offset, 0, ctx->cid_table->coding_unit_size - 4 - offset - 640);

  806. 

  807.     AV_WB32(buf + ctx->cid_table->coding_unit_size - 4, 0x600DC0DE); // EOF

  808. 

  809.     if (ctx->interlaced && first_field) {

  810.         first_field     = 0;

  811.         ctx->cur_field ^= 1;

  812.         buf      += ctx->cid_table->coding_unit_size;

  813.         buf_size -= ctx->cid_table->coding_unit_size;

  814.         goto encode_coding_unit;

  815.     }

  816. 

  817.     ctx->frame.quality = ctx->qscale*FF_QP2LAMBDA;

  818. 

  819.     return ctx->cid_table->frame_size;

  820. }

  821. 

  822. static int dnxhd_encode_end(AVCodecContext *avctx)

  823. {

  824.     DNXHDEncContext *ctx = avctx->priv_data;

  825.     int max_level = 1<<(ctx->cid_table->bit_depth+2);

  826.     int i;

  827. 

  828.     av_free(ctx->vlc_codes-max_level*2);

  829.     av_free(ctx->vlc_bits -max_level*2);

  830.     av_freep(&ctx->run_codes);

  831.     av_freep(&ctx->run_bits);

  832. 

  833.     av_freep(&ctx->mb_bits);

  834.     av_freep(&ctx->mb_qscale);

  835.     av_freep(&ctx->mb_rc);

  836.     av_freep(&ctx->mb_cmp);

  837.     av_freep(&ctx->slice_size);

  838.     av_freep(&ctx->slice_offs);

  839. 

  840.     av_freep(&ctx->qmatrix_c);

  841.     av_freep(&ctx->qmatrix_l);

  842.     av_freep(&ctx->qmatrix_c16);

  843.     av_freep(&ctx->qmatrix_l16);

  844. 

  845.     for (i = 1; i < avctx->thread_count; i++)

  846.         av_freep(&ctx->thread[i]);

  847. 

  848.     return 0;

  849. }

  850. 

  851. AVCodec dnxhd_encoder = {

  852.     "dnxhd",

  853.     CODEC_TYPE_VIDEO,

  854.     CODEC_ID_DNXHD,

  855.     sizeof(DNXHDEncContext),

  856.     dnxhd_encode_init,

  857.     dnxhd_encode_picture,

  858.     dnxhd_encode_end,

  859.     .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P, PIX_FMT_NONE},

  860.     .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),

  861. };