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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.  * Copyright (c) 2011 MirriAd Ltd

  5.  *

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

  7.  * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>

  8.  *

  9.  * This file is part of Libav.

  10.  *

  11.  * Libav is free software; you can redistribute it and/or

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

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

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

  15.  *

  16.  * Libav is distributed in the hope that it will be useful,

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

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

  19.  * Lesser General Public License for more details.

  20.  *

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

  22.  * License along with Libav; if not, write to the Free Software

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

  24.  */

  25. 

  26. //#define DEBUG

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

  28. 

  29. #include "libavutil/opt.h"

  30. #include "avcodec.h"

  31. #include "dsputil.h"

  32. #include "internal.h"

  33. #include "mpegvideo.h"

  34. #include "dnxhdenc.h"

  35. 

  36. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  37. #define DNX10BIT_QMAT_SHIFT 18 // The largest value that will not lead to overflow for 10bit samples.

  38. 

  39. static const AVOption options[]={

  40.     {"nitris_compat", "encode with Avid Nitris compatibility", offsetof(DNXHDEncContext, nitris_compat), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, VE},

  41. {NULL}

  42. };

  43. static const AVClass class = { "dnxhd", av_default_item_name, options, LIBAVUTIL_VERSION_INT };

  44. 

  45. #define LAMBDA_FRAC_BITS 10

  46. 

  47. static void dnxhd_8bit_get_pixels_8x4_sym(DCTELEM *restrict block, const uint8_t *pixels, int line_size)

  48. {

  49.     int i;

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

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

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

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

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

  55.         pixels += line_size;

  56.         block += 8;

  57.     }

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

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

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

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

  62. }

  63. 

  64. static av_always_inline void dnxhd_10bit_get_pixels_8x4_sym(DCTELEM *restrict block, const uint8_t *pixels, int line_size)

  65. {

  66.     int i;

  67. 

  68.     block += 32;

  69. 

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

  71.         memcpy(block + i     * 8, pixels + i * line_size, 8 * sizeof(*block));

  72.         memcpy(block - (i+1) * 8, pixels + i * line_size, 8 * sizeof(*block));

  73.     }

  74. }

  75. 

  76. static int dnxhd_10bit_dct_quantize(MpegEncContext *ctx, DCTELEM *block,

  77.                                     int n, int qscale, int *overflow)

  78. {

  79.     const uint8_t *scantable= ctx->intra_scantable.scantable;

  80.     const int *qmat = ctx->q_intra_matrix[qscale];

  81.     int last_non_zero = 0;

  82.     int i;

  83. 

  84.     ctx->dsp.fdct(block);

  85. 

  86.     // Divide by 4 with rounding, to compensate scaling of DCT coefficients

  87.     block[0] = (block[0] + 2) >> 2;

  88. 

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

  90.         int j = scantable[i];

  91.         int sign = block[j] >> 31;

  92.         int level = (block[j] ^ sign) - sign;

  93.         level = level * qmat[j] >> DNX10BIT_QMAT_SHIFT;

  94.         block[j] = (level ^ sign) - sign;

  95.         if (level)

  96.             last_non_zero = i;

  97.     }

  98. 

  99.     return last_non_zero;

  100. }

  101. 

  102. static int dnxhd_init_vlc(DNXHDEncContext *ctx)

  103. {

  104.     int i, j, level, run;

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

  106. 

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

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

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

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

  111. 

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

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

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

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

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

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

  118. 

  119.             MASK_ABS(sign, alevel);

  120.             if (alevel > 64) {

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

  122.                 alevel -= offset<<6;

  123.             }

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

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

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

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

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

  129.                     if (alevel) {

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

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

  132.                     } else {

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

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

  135.                     }

  136.                     break;

  137.                 }

  138.             }

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

  140.             if (offset) {

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

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

  143.             }

  144.         }

  145.     }

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

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

  148.         assert(run < 63);

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

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

  151.     }

  152.     return 0;

  153.  fail:

  154.     return -1;

  155. }

  156. 

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

  158. {

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

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

  161.     int qscale, i;

  162.     const uint8_t *luma_weight_table   = ctx->cid_table->luma_weight;

  163.     const uint8_t *chroma_weight_table = ctx->cid_table->chroma_weight;

  164. 

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

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

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

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

  169. 

  170.     if (ctx->cid_table->bit_depth == 8) {

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

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

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

  174.         }

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

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

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

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

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

  180.         }

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

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

  183. 

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

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

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

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

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

  189.             }

  190.         }

  191.     } else {

  192.         // 10-bit

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

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

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

  196. 

  197.                 // The quantization formula from the VC-3 standard is:

  198.                 // quantized = sign(block[i]) * floor(abs(block[i]/s) * p / (qscale * weight_table[i]))

  199.                 // Where p is 32 for 8-bit samples and 8 for 10-bit ones.

  200.                 // The s factor compensates scaling of DCT coefficients done by the DCT routines,

  201.                 // and therefore is not present in standard.  It's 8 for 8-bit samples and 4 for 10-bit ones.

  202.                 // We want values of ctx->qtmatrix_l and ctx->qtmatrix_r to be:

  203.                 // ((1 << DNX10BIT_QMAT_SHIFT) * (p / s)) / (qscale * weight_table[i])

  204.                 // For 10-bit samples, p / s == 2

  205.                 ctx->qmatrix_l[qscale][j] = (1 << (DNX10BIT_QMAT_SHIFT + 1)) / (qscale * luma_weight_table[i]);

  206.                 ctx->qmatrix_c[qscale][j] = (1 << (DNX10BIT_QMAT_SHIFT + 1)) / (qscale * chroma_weight_table[i]);

  207.             }

  208.         }

  209.     }

  210. 

  211.     return 0;

  212.  fail:

  213.     return -1;

  214. }

  215. 

  216. static int dnxhd_init_rc(DNXHDEncContext *ctx)

  217. {

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

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

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

  221. 

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

  223.     ctx->qscale = 1;

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

  225.     return 0;

  226.  fail:

  227.     return -1;

  228. }

  229. 

  230. static int dnxhd_encode_init(AVCodecContext *avctx)

  231. {

  232.     DNXHDEncContext *ctx = avctx->priv_data;

  233.     int i, index, bit_depth;

  234. 

  235.     switch (avctx->pix_fmt) {

  236.     case PIX_FMT_YUV422P:

  237.         bit_depth = 8;

  238.         break;

  239.     case PIX_FMT_YUV422P10:

  240.         bit_depth = 10;

  241.         break;

  242.     default:

  243.         av_log(avctx, AV_LOG_ERROR, "pixel format is incompatible with DNxHD\n");

  244.         return -1;

  245.     }

  246. 

  247.     ctx->cid = ff_dnxhd_find_cid(avctx, bit_depth);

  248.     if (!ctx->cid) {

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

  250.         return -1;

  251.     }

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

  253. 

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

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

  256. 

  257.     ctx->m.avctx = avctx;

  258.     ctx->m.mb_intra = 1;

  259.     ctx->m.h263_aic = 1;

  260. 

  261.     avctx->bits_per_raw_sample = ctx->cid_table->bit_depth;

  262. 

  263.     ff_dsputil_init(&ctx->m.dsp, avctx);

  264.     ff_dct_common_init(&ctx->m);

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

  266.         ctx->m.dct_quantize = ff_dct_quantize_c;

  267. 

  268.     if (ctx->cid_table->bit_depth == 10) {

  269.        ctx->m.dct_quantize = dnxhd_10bit_dct_quantize;

  270.        ctx->get_pixels_8x4_sym = dnxhd_10bit_get_pixels_8x4_sym;

  271.        ctx->block_width_l2 = 4;

  272.     } else {

  273.        ctx->get_pixels_8x4_sym = dnxhd_8bit_get_pixels_8x4_sym;

  274.        ctx->block_width_l2 = 3;

  275.     }

  276. 

  277.     if (ARCH_X86)

  278.         ff_dnxhdenc_init_x86(ctx);

  279. 

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

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

  282. 

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

  284.         ctx->interlaced = 1;

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

  286.     }

  287. 

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

  289. 

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

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

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

  293.         return -1;

  294. 

  295.     // Avid Nitris hardware decoder requires a minimum amount of padding in the coding unit payload

  296.     if (ctx->nitris_compat)

  297.         ctx->min_padding = 1600;

  298. 

  299.     if (dnxhd_init_vlc(ctx) < 0)

  300.         return -1;

  301.     if (dnxhd_init_rc(ctx) < 0)

  302.         return -1;

  303. 

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

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

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

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

  308. 

  309.     ctx->frame.key_frame = 1;

  310.     ctx->frame.pict_type = AV_PICTURE_TYPE_I;

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

  312. 

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

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

  315.         return -1;

  316.     }

  317. 

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

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

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

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

  322.     }

  323. 

  324.     return 0;

  325.  fail: //for FF_ALLOCZ_OR_GOTO

  326.     return -1;

  327. }

  328. 

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

  330. {

  331.     DNXHDEncContext *ctx = avctx->priv_data;

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

  333. 

  334.     memset(buf, 0, 640);

  335. 

  336.     memcpy(buf, header_prefix, 5);

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

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

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

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

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

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

  343. 

  344.     buf[0x21] = ctx->cid_table->bit_depth == 10 ? 0x58 : 0x38;

  345.     buf[0x22] = 0x88 + (ctx->interlaced<<2);

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

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

  348. 

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

  350. 

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

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

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

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

  355. 

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

  357.     return 0;

  358. }

  359. 

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

  361. {

  362.     int nbits;

  363.     if (diff < 0) {

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

  365.         diff--;

  366.     } else {

  367.         nbits = av_log2_16bit(2*diff);

  368.     }

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

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

  371. }

  372. 

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

  374. {

  375.     int last_non_zero = 0;

  376.     int slevel, i, j;

  377. 

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

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

  380. 

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

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

  383.         slevel = block[j];

  384.         if (slevel) {

  385.             int run_level = i - last_non_zero - 1;

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

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

  388.             if (run_level)

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

  390.             last_non_zero = i;

  391.         }

  392.     }

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

  394. }

  395. 

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

  397. {

  398.     const uint8_t *weight_matrix;

  399.     int level;

  400.     int i;

  401. 

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

  403. 

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

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

  406.         level = block[j];

  407.         if (level) {

  408.             if (level < 0) {

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

  410.                 if (ctx->cid_table->bit_depth == 10) {

  411.                     if (weight_matrix[i] != 8)

  412.                         level += 8;

  413.                     level >>= 4;

  414.                 } else {

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

  416.                         level += 32;

  417.                     level >>= 6;

  418.                 }

  419.                 level = -level;

  420.             } else {

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

  422.                 if (ctx->cid_table->bit_depth == 10) {

  423.                     if (weight_matrix[i] != 8)

  424.                         level += 8;

  425.                     level >>= 4;

  426.                 } else {

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

  428.                         level += 32;

  429.                     level >>= 6;

  430.                 }

  431.             }

  432.             block[j] = level;

  433.         }

  434.     }

  435. }

  436. 

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

  438. {

  439.     int score = 0;

  440.     int i;

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

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

  443.     return score;

  444. }

  445. 

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

  447. {

  448.     int last_non_zero = 0;

  449.     int bits = 0;

  450.     int i, j, level;

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

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

  453.         level = block[j];

  454.         if (level) {

  455.             int run_level = i - last_non_zero - 1;

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

  457.             last_non_zero = i;

  458.         }

  459.     }

  460.     return bits;

  461. }

  462. 

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

  464. {

  465.     const int bs = ctx->block_width_l2;

  466.     const int bw = 1 << bs;

  467.     const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize)   + (mb_x << bs+1);

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

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

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

  471. 

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

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

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

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

  476. 

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

  478.         if (ctx->interlaced) {

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

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

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

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

  483.         } else {

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

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

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

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

  488.         }

  489.     } else {

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

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

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

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

  494.     }

  495. }

  496. 

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

  498. {

  499.     if (i&2) {

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

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

  502.         return 1 + (i&1);

  503.     } else {

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

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

  506.         return 0;

  507.     }

  508. }

  509. 

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

  511. {

  512.     DNXHDEncContext *ctx = avctx->priv_data;

  513.     int mb_y = jobnr, mb_x;

  514.     int qscale = ctx->qscale;

  515.     LOCAL_ALIGNED_16(DCTELEM, block, [64]);

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

  517. 

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

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

  520.     ctx->m.last_dc[2] = 1 << (ctx->cid_table->bit_depth + 2);

  521. 

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

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

  524.         int ssd     = 0;

  525.         int ac_bits = 0;

  526.         int dc_bits = 0;

  527.         int i;

  528. 

  529.         dnxhd_get_blocks(ctx, mb_x, mb_y);

  530. 

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

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

  533.             int overflow, nbits, diff, last_index;

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

  535. 

  536.             memcpy(block, src_block, 64*sizeof(*block));

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

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

  539. 

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

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

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

  543. 

  544.             assert(nbits < ctx->cid_table->bit_depth + 4);

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

  546. 

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

  548. 

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

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

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

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

  553.             }

  554.         }

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

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

  557.     }

  558.     return 0;

  559. }

  560. 

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

  562. {

  563.     DNXHDEncContext *ctx = avctx->priv_data;

  564.     int mb_y = jobnr, mb_x;

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

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

  567. 

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

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

  570.     ctx->m.last_dc[2] = 1 << (ctx->cid_table->bit_depth + 2);

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

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

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

  574.         int i;

  575. 

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

  577. 

  578.         dnxhd_get_blocks(ctx, mb_x, mb_y);

  579. 

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

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

  582.             int overflow, n = dnxhd_switch_matrix(ctx, i);

  583.             int last_index = ctx->m.dct_quantize(&ctx->m, block, i,

  584.                                                  qscale, &overflow);

  585.             //START_TIMER;

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

  587.             //STOP_TIMER("encode_block");

  588.         }

  589.     }

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

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

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

  593.     return 0;

  594. }

  595. 

  596. static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx)

  597. {

  598.     int mb_y, mb_x;

  599.     int offset = 0;

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

  601.         int thread_size;

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

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

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

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

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

  607.         }

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

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

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

  611.         offset += thread_size;

  612.     }

  613. }

  614. 

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

  616. {

  617.     DNXHDEncContext *ctx = avctx->priv_data;

  618.     int mb_y = jobnr, mb_x;

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

  620.     if (ctx->cid_table->bit_depth == 8) {

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

  622.         for (mb_x = 0; mb_x < ctx->m.mb_width; ++mb_x, pix += 16) {

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

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

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

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

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

  628.         }

  629.     } else { // 10-bit

  630.         int const linesize = ctx->m.linesize >> 1;

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

  632.             uint16_t *pix = (uint16_t*)ctx->thread[0]->src[0] + ((mb_y << 4) * linesize) + (mb_x << 4);

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

  634.             int sum = 0;

  635.             int sqsum = 0;

  636.             int mean, sqmean;

  637.             int i, j;

  638.             // Macroblocks are 16x16 pixels, unlike DCT blocks which are 8x8.

  639.             for (i = 0; i < 16; ++i) {

  640.                 for (j = 0; j < 16; ++j) {

  641.                     // Turn 16-bit pixels into 10-bit ones.

  642.                     int const sample = (unsigned)pix[j] >> 6;

  643.                     sum += sample;

  644.                     sqsum += sample * sample;

  645.                     // 2^10 * 2^10 * 16 * 16 = 2^28, which is less than INT_MAX

  646.                 }

  647.                 pix += linesize;

  648.             }

  649.             mean = sum >> 8; // 16*16 == 2^8

  650.             sqmean = sqsum >> 8;

  651.             ctx->mb_cmp[mb].value = sqmean - mean * mean;

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

  653.         }

  654.     }

  655.     return 0;

  656. }

  657. 

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

  659. {

  660.     int lambda, up_step, down_step;

  661.     int last_lower = INT_MAX, last_higher = 0;

  662.     int x, y, q;

  663. 

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

  665.         ctx->qscale = q;

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

  667.     }

  668.     up_step = down_step = 2<<LAMBDA_FRAC_BITS;

  669.     lambda = ctx->lambda;

  670. 

  671.     for (;;) {

  672.         int bits = 0;

  673.         int end = 0;

  674.         if (lambda == last_higher) {

  675.             lambda++;

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

  677.         }

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

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

  680.                 unsigned min = UINT_MAX;

  681.                 int qscale = 1;

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

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

  684.                     unsigned score = ctx->mb_rc[q][mb].bits*lambda+

  685.                         ((unsigned)ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);

  686.                     if (score < min) {

  687.                         min = score;

  688.                         qscale = q;

  689.                     }

  690.                 }

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

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

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

  694.             }

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

  696.             if (bits > ctx->frame_bits)

  697.                 break;

  698.         }

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

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

  701.         if (end) {

  702.             if (bits > ctx->frame_bits)

  703.                 return -1;

  704.             break;

  705.         }

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

  707.             last_lower = FFMIN(lambda, last_lower);

  708.             if (last_higher != 0)

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

  710.             else

  711.                 lambda -= down_step;

  712.             down_step = FFMIN((int64_t)down_step*5, INT_MAX);

  713.             up_step = 1<<LAMBDA_FRAC_BITS;

  714.             lambda = FFMAX(1, lambda);

  715.             if (lambda == last_lower)

  716.                 break;

  717.         } else {

  718.             last_higher = FFMAX(lambda, last_higher);

  719.             if (last_lower != INT_MAX)

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

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

  722.                 return -1;

  723.             else

  724.                 lambda += up_step;

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

  726.             down_step = 1<<LAMBDA_FRAC_BITS;

  727.         }

  728.     }

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

  730.     ctx->lambda = lambda;

  731.     return 0;

  732. }

  733. 

  734. static int dnxhd_find_qscale(DNXHDEncContext *ctx)

  735. {

  736.     int bits = 0;

  737.     int up_step = 1;

  738.     int down_step = 1;

  739.     int last_higher = 0;

  740.     int last_lower = INT_MAX;

  741.     int qscale;

  742.     int x, y;

  743. 

  744.     qscale = ctx->qscale;

  745.     for (;;) {

  746.         bits = 0;

  747.         ctx->qscale = qscale;

  748.         // XXX avoid recalculating bits

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

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

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

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

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

  754.             if (bits > ctx->frame_bits)

  755.                 break;

  756.         }

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

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

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

  760.             if (qscale == 1)

  761.                 return 1;

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

  763.                 qscale = last_higher;

  764.                 break;

  765.             }

  766.             last_lower = FFMIN(qscale, last_lower);

  767.             if (last_higher != 0)

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

  769.             else

  770.                 qscale -= down_step++;

  771.             if (qscale < 1)

  772.                 qscale = 1;

  773.             up_step = 1;

  774.         } else {

  775.             if (last_lower == qscale + 1)

  776.                 break;

  777.             last_higher = FFMAX(qscale, last_higher);

  778.             if (last_lower != INT_MAX)

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

  780.             else

  781.                 qscale += up_step++;

  782.             down_step = 1;

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

  784.                 return -1;

  785.         }

  786.     }

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

  788.     ctx->qscale = qscale;

  789.     return 0;

  790. }

  791. 

  792. #define BUCKET_BITS 8

  793. #define RADIX_PASSES 4

  794. #define NBUCKETS (1 << BUCKET_BITS)

  795. 

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

  797. {

  798.     value >>= shift;

  799.     value &= NBUCKETS - 1;

  800.     return NBUCKETS - 1 - value;

  801. }

  802. 

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

  804. {

  805.     int i, j;

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

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

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

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

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

  811.             v >>= BUCKET_BITS;

  812.         }

  813.         assert(!v);

  814.     }

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

  816.         int offset = size;

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

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

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

  820.     }

  821. }

  822. 

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

  824. {

  825.     int shift = pass * BUCKET_BITS;

  826.     int i;

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

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

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

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

  831.     }

  832. }

  833. 

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

  835. {

  836.     int buckets[RADIX_PASSES][NBUCKETS];

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

  838.     radix_count(data, size, buckets);

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

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

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

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

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

  844.     }

  845.     av_free(tmp);

  846. }

  847. 

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

  849. {

  850.     int max_bits = 0;

  851.     int ret, x, y;

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

  853.         return -1;

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

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

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

  857.             int delta_bits;

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

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

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

  861.             if (!RC_VARIANCE) {

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

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

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

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

  866.                     : INT_MIN; //avoid increasing qscale

  867.             }

  868.         }

  869.         max_bits += 31; //worst padding

  870.     }

  871.     if (!ret) {

  872.         if (RC_VARIANCE)

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

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

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

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

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

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

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

  880.         }

  881.     }

  882.     return 0;

  883. }

  884. 

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

  886. {

  887.     int i;

  888. 

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

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

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

  892.     }

  893. 

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

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

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

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

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

  899.     }

  900. 

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

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

  903. }

  904. 

  905. static int dnxhd_encode_picture(AVCodecContext *avctx, AVPacket *pkt,

  906.                                 const AVFrame *frame, int *got_packet)

  907. {

  908.     DNXHDEncContext *ctx = avctx->priv_data;

  909.     int first_field = 1;

  910.     int offset, i, ret;

  911.     uint8_t *buf;

  912. 

  913.     if ((ret = ff_alloc_packet(pkt, ctx->cid_table->frame_size)) < 0) {

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

  915.         return ret;

  916.     }

  917.     buf = pkt->data;

  918. 

  919.     dnxhd_load_picture(ctx, frame);

  920. 

  921.  encode_coding_unit:

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

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

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

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

  926.     }

  927. 

  928.     dnxhd_write_header(avctx, buf);

  929. 

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

  931.         ret = dnxhd_encode_rdo(avctx, ctx);

  932.     else

  933.         ret = dnxhd_encode_fast(avctx, ctx);

  934.     if (ret < 0) {

  935.         av_log(avctx, AV_LOG_ERROR,

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

  937.         return -1;

  938.     }

  939. 

  940.     dnxhd_setup_threads_slices(ctx);

  941. 

  942.     offset = 0;

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

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

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

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

  947.     }

  948. 

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

  950. 

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

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

  953. 

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

  955. 

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

  957.         first_field     = 0;

  958.         ctx->cur_field ^= 1;

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

  960.         goto encode_coding_unit;

  961.     }

  962. 

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

  964. 

  965.     pkt->flags |= AV_PKT_FLAG_KEY;

  966.     *got_packet = 1;

  967.     return 0;

  968. }

  969. 

  970. static int dnxhd_encode_end(AVCodecContext *avctx)

  971. {

  972.     DNXHDEncContext *ctx = avctx->priv_data;

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

  974.     int i;

  975. 

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

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

  978.     av_freep(&ctx->run_codes);

  979.     av_freep(&ctx->run_bits);

  980. 

  981.     av_freep(&ctx->mb_bits);

  982.     av_freep(&ctx->mb_qscale);

  983.     av_freep(&ctx->mb_rc);

  984.     av_freep(&ctx->mb_cmp);

  985.     av_freep(&ctx->slice_size);

  986.     av_freep(&ctx->slice_offs);

  987. 

  988.     av_freep(&ctx->qmatrix_c);

  989.     av_freep(&ctx->qmatrix_l);

  990.     av_freep(&ctx->qmatrix_c16);

  991.     av_freep(&ctx->qmatrix_l16);

  992. 

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

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

  995. 

  996.     return 0;

  997. }

  998. 

  999. AVCodec ff_dnxhd_encoder = {

  1000.     .name           = "dnxhd",

  1001.     .type           = AVMEDIA_TYPE_VIDEO,

  1002.     .id             = AV_CODEC_ID_DNXHD,

  1003.     .priv_data_size = sizeof(DNXHDEncContext),

  1004.     .init           = dnxhd_encode_init,

  1005.     .encode2        = dnxhd_encode_picture,

  1006.     .close          = dnxhd_encode_end,

  1007.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  1008.     .pix_fmts       = (const enum PixelFormat[]){ PIX_FMT_YUV422P,

  1009.                                                   PIX_FMT_YUV422P10,

  1010.                                                   PIX_FMT_NONE },

  1011.     .long_name      = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),

  1012.     .priv_class     = &class,

  1013. };