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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 FFmpeg.

  10.  *

  11.  * FFmpeg 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.  * FFmpeg 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 FFmpeg; 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. #include "internal.h"

  36. 

  37. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

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

  39. 

  40. static const AVOption options[]={

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

  42. {NULL}

  43. };

  44. 

  45. static const AVClass class = {

  46.     .class_name = "dnxhd",

  47.     .item_name  = av_default_item_name,

  48.     .option     = options,

  49.     .version    = LIBAVUTIL_VERSION_INT,

  50. };

  51. 

  52. #define LAMBDA_FRAC_BITS 10

  53. 

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

  55. {

  56.     int i;

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

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

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

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

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

  62.         pixels += line_size;

  63.         block += 8;

  64.     }

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

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

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

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

  69. }

  70. 

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

  72. {

  73.     int i;

  74. 

  75.     block += 32;

  76. 

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

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

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

  80.     }

  81. }

  82. 

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

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

  85. {

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

  87.     const int *qmat = n<4 ? ctx->q_intra_matrix[qscale] : ctx->q_chroma_intra_matrix[qscale];

  88.     int last_non_zero = 0;

  89.     int i;

  90. 

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

  92. 

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

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

  95. 

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

  97.         int j = scantable[i];

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

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

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

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

  102.         if (level)

  103.             last_non_zero = i;

  104.     }

  105. 

  106.     return last_non_zero;

  107. }

  108. 

  109. static int dnxhd_init_vlc(DNXHDEncContext *ctx)

  110. {

  111.     int i, j, level, run;

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

  113. 

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

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

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

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

  118. 

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

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

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

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

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

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

  125. 

  126.             MASK_ABS(sign, alevel);

  127.             if (alevel > 64) {

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

  129.                 alevel -= offset<<6;

  130.             }

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

  132.                 if (ctx->cid_table->ac_level[j] >> 1 == alevel &&

  133.                     (!offset || (ctx->cid_table->ac_flags[j] & 1) && offset) &&

  134.                     (!run    || (ctx->cid_table->ac_flags[j] & 2) && run)) {

  135.                     av_assert1(!ctx->vlc_codes[index]);

  136.                     if (alevel) {

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

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

  139.                     } else {

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

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

  142.                     }

  143.                     break;

  144.                 }

  145.             }

  146.             av_assert0(!alevel || j < 257);

  147.             if (offset) {

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

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

  150.             }

  151.         }

  152.     }

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

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

  155.         av_assert0(run < 63);

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

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

  158.     }

  159.     return 0;

  160.  fail:

  161.     return -1;

  162. }

  163. 

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

  165. {

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

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

  168.     int qscale, i;

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

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

  171. 

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

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

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

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

  176. 

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

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

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

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

  181.         }

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

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

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

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

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

  187.         }

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

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

  190. 

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

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

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

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

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

  196.             }

  197.         }

  198.     } else {

  199.         // 10-bit

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

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

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

  203. 

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

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

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

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

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

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

  210.                 // ((1 << DNX10BIT_QMAT_SHIFT) * (p / s)) / (qscale * weight_table[i])

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

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

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

  214.             }

  215.         }

  216.     }

  217. 

  218.     ctx->m.q_chroma_intra_matrix16 = ctx->qmatrix_c16;

  219.     ctx->m.q_chroma_intra_matrix   = ctx->qmatrix_c;

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

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

  222. 

  223.     return 0;

  224.  fail:

  225.     return -1;

  226. }

  227. 

  228. static int dnxhd_init_rc(DNXHDEncContext *ctx)

  229. {

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

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

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

  233. 

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

  235.     ctx->qscale = 1;

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

  237.     return 0;

  238.  fail:

  239.     return -1;

  240. }

  241. 

  242. static int dnxhd_encode_init(AVCodecContext *avctx)

  243. {

  244.     DNXHDEncContext *ctx = avctx->priv_data;

  245.     int i, index, bit_depth;

  246. 

  247.     switch (avctx->pix_fmt) {

  248.     case PIX_FMT_YUV422P:

  249.         bit_depth = 8;

  250.         break;

  251.     case PIX_FMT_YUV422P10:

  252.         bit_depth = 10;

  253.         break;

  254.     default:

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

  256.         return -1;

  257.     }

  258. 

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

  260.     if (!ctx->cid) {

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

  262.         return -1;

  263.     }

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

  265. 

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

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

  268. 

  269.     ctx->m.avctx = avctx;

  270.     ctx->m.mb_intra = 1;

  271.     ctx->m.h263_aic = 1;

  272. 

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

  274. 

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

  276.     ff_dct_common_init(&ctx->m);

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

  278.         ctx->m.dct_quantize = ff_dct_quantize_c;

  279. 

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

  281.        ctx->m.dct_quantize = dnxhd_10bit_dct_quantize;

  282.        ctx->get_pixels_8x4_sym = dnxhd_10bit_get_pixels_8x4_sym;

  283.        ctx->block_width_l2 = 4;

  284.     } else {

  285.        ctx->get_pixels_8x4_sym = dnxhd_8bit_get_pixels_8x4_sym;

  286.        ctx->block_width_l2 = 3;

  287.     }

  288. 

  289. #if HAVE_MMX

  290.     ff_dnxhd_init_mmx(ctx);

  291. #endif

  292. 

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

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

  295. 

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

  297.         ctx->interlaced = 1;

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

  299.     }

  300. 

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

  302. 

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

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

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

  306.         return -1;

  307. 

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

  309.     if (ctx->nitris_compat)

  310.         ctx->min_padding = 1600;

  311. 

  312.     if (dnxhd_init_vlc(ctx) < 0)

  313.         return -1;

  314.     if (dnxhd_init_rc(ctx) < 0)

  315.         return -1;

  316. 

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

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

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

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

  321. 

  322.     ctx->frame.key_frame = 1;

  323.     ctx->frame.pict_type = AV_PICTURE_TYPE_I;

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

  325. 

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

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

  328.         return -1;

  329.     }

  330. 

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

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

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

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

  335.     }

  336. 

  337.     return 0;

  338.  fail: //for FF_ALLOCZ_OR_GOTO

  339.     return -1;

  340. }

  341. 

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

  343. {

  344.     DNXHDEncContext *ctx = avctx->priv_data;

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

  346. 

  347.     memset(buf, 0, 640);

  348. 

  349.     memcpy(buf, header_prefix, 5);

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

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

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

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

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

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

  356. 

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

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

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

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

  361. 

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

  363. 

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

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

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

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

  368. 

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

  370.     return 0;

  371. }

  372. 

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

  374. {

  375.     int nbits;

  376.     if (diff < 0) {

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

  378.         diff--;

  379.     } else {

  380.         nbits = av_log2_16bit(2*diff);

  381.     }

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

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

  384. }

  385. 

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

  387. {

  388.     int last_non_zero = 0;

  389.     int slevel, i, j;

  390. 

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

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

  393. 

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

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

  396.         slevel = block[j];

  397.         if (slevel) {

  398.             int run_level = i - last_non_zero - 1;

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

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

  401.             if (run_level)

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

  403.             last_non_zero = i;

  404.         }

  405.     }

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

  407. }

  408. 

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

  410. {

  411.     const uint8_t *weight_matrix;

  412.     int level;

  413.     int i;

  414. 

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

  416. 

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

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

  419.         level = block[j];

  420.         if (level) {

  421.             if (level < 0) {

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

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

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

  425.                         level += 8;

  426.                     level >>= 4;

  427.                 } else {

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

  429.                         level += 32;

  430.                     level >>= 6;

  431.                 }

  432.                 level = -level;

  433.             } else {

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

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

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

  437.                         level += 8;

  438.                     level >>= 4;

  439.                 } else {

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

  441.                         level += 32;

  442.                     level >>= 6;

  443.                 }

  444.             }

  445.             block[j] = level;

  446.         }

  447.     }

  448. }

  449. 

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

  451. {

  452.     int score = 0;

  453.     int i;

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

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

  456.     return score;

  457. }

  458. 

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

  460. {

  461.     int last_non_zero = 0;

  462.     int bits = 0;

  463.     int i, j, level;

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

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

  466.         level = block[j];

  467.         if (level) {

  468.             int run_level = i - last_non_zero - 1;

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

  470.             last_non_zero = i;

  471.         }

  472.     }

  473.     return bits;

  474. }

  475. 

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

  477. {

  478.     const int bs = ctx->block_width_l2;

  479.     const int bw = 1 << bs;

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

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

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

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

  484. 

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

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

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

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

  489. 

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

  491.         if (ctx->interlaced) {

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

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

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

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

  496.         } else {

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

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

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

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

  501.         }

  502.     } else {

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

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

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

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

  507.     }

  508. }

  509. 

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

  511. {

  512.     const static uint8_t component[8]={0,0,1,2,0,0,1,2};

  513.     return component[i];

  514. }

  515. 

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

  517. {

  518.     DNXHDEncContext *ctx = avctx->priv_data;

  519.     int mb_y = jobnr, mb_x;

  520.     int qscale = ctx->qscale;

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

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

  523. 

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

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

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

  527. 

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

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

  530.         int ssd     = 0;

  531.         int ac_bits = 0;

  532.         int dc_bits = 0;

  533.         int i;

  534. 

  535.         dnxhd_get_blocks(ctx, mb_x, mb_y);

  536. 

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

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

  539.             int overflow, nbits, diff, last_index;

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

  541. 

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

  543.             last_index = ctx->m.dct_quantize(&ctx->m, block, 4&(2*i), qscale, &overflow);

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

  545. 

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

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

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

  549. 

  550.             av_assert1(nbits < ctx->cid_table->bit_depth + 4);

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

  552. 

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

  554. 

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

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

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

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

  559.             }

  560.         }

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

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

  563.     }

  564.     return 0;

  565. }

  566. 

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

  568. {

  569.     DNXHDEncContext *ctx = avctx->priv_data;

  570.     int mb_y = jobnr, mb_x;

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

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

  573. 

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

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

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

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

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

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

  580.         int i;

  581. 

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

  583. 

  584.         dnxhd_get_blocks(ctx, mb_x, mb_y);

  585. 

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

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

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

  589.             int last_index = ctx->m.dct_quantize(&ctx->m, block, 4&(2*i), qscale, &overflow);

  590.             //START_TIMER;

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

  592.             //STOP_TIMER("encode_block");

  593.         }

  594.     }

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

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

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

  598.     return 0;

  599. }

  600. 

  601. static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx)

  602. {

  603.     int mb_y, mb_x;

  604.     int offset = 0;

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

  606.         int thread_size;

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

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

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

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

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

  612.         }

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

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

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

  616.         offset += thread_size;

  617.     }

  618. }

  619. 

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

  621. {

  622.     DNXHDEncContext *ctx = avctx->priv_data;

  623.     int mb_y = jobnr, mb_x;

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

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

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

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

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

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

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

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

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

  633.         }

  634.     } else { // 10-bit

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

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

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

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

  639.             int sum = 0;

  640.             int sqsum = 0;

  641.             int mean, sqmean;

  642.             int i, j;

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

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

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

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

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

  648.                     sum += sample;

  649.                     sqsum += sample * sample;

  650.                     // 2^10 * 2^10 * 16 * 16 = 2^28, which is less than INT_MAX

  651.                 }

  652.                 pix += linesize;

  653.             }

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

  655.             sqmean = sqsum >> 8;

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

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

  658.         }

  659.     }

  660.     return 0;

  661. }

  662. 

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

  664. {

  665.     int lambda, up_step, down_step;

  666.     int last_lower = INT_MAX, last_higher = 0;

  667.     int x, y, q;

  668. 

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

  670.         ctx->qscale = q;

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

  672.     }

  673.     up_step = down_step = 2<<LAMBDA_FRAC_BITS;

  674.     lambda = ctx->lambda;

  675. 

  676.     for (;;) {

  677.         int bits = 0;

  678.         int end = 0;

  679.         if (lambda == last_higher) {

  680.             lambda++;

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

  682.         }

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

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

  685.                 unsigned min = UINT_MAX;

  686.                 int qscale = 1;

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

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

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

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

  691.                     if (score < min) {

  692.                         min = score;

  693.                         qscale = q;

  694.                     }

  695.                 }

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

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

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

  699.             }

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

  701.             if (bits > ctx->frame_bits)

  702.                 break;

  703.         }

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

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

  706.         if (end) {

  707.             if (bits > ctx->frame_bits)

  708.                 return -1;

  709.             break;

  710.         }

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

  712.             last_lower = FFMIN(lambda, last_lower);

  713.             if (last_higher != 0)

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

  715.             else

  716.                 lambda -= down_step;

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

  718.             up_step = 1<<LAMBDA_FRAC_BITS;

  719.             lambda = FFMAX(1, lambda);

  720.             if (lambda == last_lower)

  721.                 break;

  722.         } else {

  723.             last_higher = FFMAX(lambda, last_higher);

  724.             if (last_lower != INT_MAX)

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

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

  727.                 return -1;

  728.             else

  729.                 lambda += up_step;

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

  731.             down_step = 1<<LAMBDA_FRAC_BITS;

  732.         }

  733.     }

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

  735.     ctx->lambda = lambda;

  736.     return 0;

  737. }

  738. 

  739. static int dnxhd_find_qscale(DNXHDEncContext *ctx)

  740. {

  741.     int bits = 0;

  742.     int up_step = 1;

  743.     int down_step = 1;

  744.     int last_higher = 0;

  745.     int last_lower = INT_MAX;

  746.     int qscale;

  747.     int x, y;

  748. 

  749.     qscale = ctx->qscale;

  750.     for (;;) {

  751.         bits = 0;

  752.         ctx->qscale = qscale;

  753.         // XXX avoid recalculating bits

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

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

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

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

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

  759.             if (bits > ctx->frame_bits)

  760.                 break;

  761.         }

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

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

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

  765.             if (qscale == 1)

  766.                 return 1;

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

  768.                 qscale = last_higher;

  769.                 break;

  770.             }

  771.             last_lower = FFMIN(qscale, last_lower);

  772.             if (last_higher != 0)

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

  774.             else

  775.                 qscale -= down_step++;

  776.             if (qscale < 1)

  777.                 qscale = 1;

  778.             up_step = 1;

  779.         } else {

  780.             if (last_lower == qscale + 1)

  781.                 break;

  782.             last_higher = FFMAX(qscale, last_higher);

  783.             if (last_lower != INT_MAX)

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

  785.             else

  786.                 qscale += up_step++;

  787.             down_step = 1;

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

  789.                 return -1;

  790.         }

  791.     }

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

  793.     ctx->qscale = qscale;

  794.     return 0;

  795. }

  796. 

  797. #define BUCKET_BITS 8

  798. #define RADIX_PASSES 4

  799. #define NBUCKETS (1 << BUCKET_BITS)

  800. 

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

  802. {

  803.     value >>= shift;

  804.     value &= NBUCKETS - 1;

  805.     return NBUCKETS - 1 - value;

  806. }

  807. 

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

  809. {

  810.     int i, j;

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

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

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

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

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

  816.             v >>= BUCKET_BITS;

  817.         }

  818.         av_assert1(!v);

  819.     }

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

  821.         int offset = size;

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

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

  824.         av_assert1(!buckets[j][0]);

  825.     }

  826. }

  827. 

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

  829. {

  830.     int shift = pass * BUCKET_BITS;

  831.     int i;

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

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

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

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

  836.     }

  837. }

  838. 

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

  840. {

  841.     int buckets[RADIX_PASSES][NBUCKETS];

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

  843.     radix_count(data, size, buckets);

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

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

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

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

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

  849.     }

  850.     av_free(tmp);

  851. }

  852. 

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

  854. {

  855.     int max_bits = 0;

  856.     int ret, x, y;

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

  858.         return -1;

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

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

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

  862.             int delta_bits;

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

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

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

  866.             if (!RC_VARIANCE) {

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

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

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

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

  871.                     : INT_MIN; //avoid increasing qscale

  872.             }

  873.         }

  874.         max_bits += 31; //worst padding

  875.     }

  876.     if (!ret) {

  877.         if (RC_VARIANCE)

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

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

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

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

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

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

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

  885.         }

  886.     }

  887.     return 0;

  888. }

  889. 

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

  891. {

  892.     int i;

  893. 

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

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

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

  897.     }

  898. 

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

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

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

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

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

  904.     }

  905. 

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

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

  908. }

  909. 

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

  911.                                 const AVFrame *frame, int *got_packet)

  912. {

  913.     DNXHDEncContext *ctx = avctx->priv_data;

  914.     int first_field = 1;

  915.     int offset, i, ret;

  916.     uint8_t *buf;

  917. 

  918.     if ((ret = ff_alloc_packet2(avctx, pkt, ctx->cid_table->frame_size)) < 0)

  919.         return ret;

  920.     buf = pkt->data;

  921. 

  922.     dnxhd_load_picture(ctx, frame);

  923. 

  924.  encode_coding_unit:

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

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

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

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

  929.     }

  930. 

  931.     dnxhd_write_header(avctx, buf);

  932. 

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

  934.         ret = dnxhd_encode_rdo(avctx, ctx);

  935.     else

  936.         ret = dnxhd_encode_fast(avctx, ctx);

  937.     if (ret < 0) {

  938.         av_log(avctx, AV_LOG_ERROR,

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

  940.         return -1;

  941.     }

  942. 

  943.     dnxhd_setup_threads_slices(ctx);

  944. 

  945.     offset = 0;

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

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

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

  949.         av_assert1(!(ctx->slice_size[i] & 3));

  950.     }

  951. 

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

  953. 

  954.     av_assert1(640 + offset + 4 <= ctx->cid_table->coding_unit_size);

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

  956. 

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

  958. 

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

  960.         first_field     = 0;

  961.         ctx->cur_field ^= 1;

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

  963.         goto encode_coding_unit;

  964.     }

  965. 

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

  967. 

  968.     pkt->flags |= AV_PKT_FLAG_KEY;

  969.     *got_packet = 1;

  970.     return 0;

  971. }

  972. 

  973. static int dnxhd_encode_end(AVCodecContext *avctx)

  974. {

  975.     DNXHDEncContext *ctx = avctx->priv_data;

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

  977.     int i;

  978. 

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

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

  981.     av_freep(&ctx->run_codes);

  982.     av_freep(&ctx->run_bits);

  983. 

  984.     av_freep(&ctx->mb_bits);

  985.     av_freep(&ctx->mb_qscale);

  986.     av_freep(&ctx->mb_rc);

  987.     av_freep(&ctx->mb_cmp);

  988.     av_freep(&ctx->slice_size);

  989.     av_freep(&ctx->slice_offs);

  990. 

  991.     av_freep(&ctx->qmatrix_c);

  992.     av_freep(&ctx->qmatrix_l);

  993.     av_freep(&ctx->qmatrix_c16);

  994.     av_freep(&ctx->qmatrix_l16);

  995. 

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

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

  998. 

  999.     return 0;

  1000. }

  1001. 

  1002. static const AVCodecDefault dnxhd_defaults[] = {

  1003.     { "qmax", "1024" }, /* Maximum quantization scale factor allowed for VC-3 */

  1004.     { NULL },

  1005. };

  1006. 

  1007. AVCodec ff_dnxhd_encoder = {

  1008.     .name           = "dnxhd",

  1009.     .type           = AVMEDIA_TYPE_VIDEO,

  1010.     .id             = AV_CODEC_ID_DNXHD,

  1011.     .priv_data_size = sizeof(DNXHDEncContext),

  1012.     .init           = dnxhd_encode_init,

  1013.     .encode2        = dnxhd_encode_picture,

  1014.     .close          = dnxhd_encode_end,

  1015.     .capabilities   = CODEC_CAP_SLICE_THREADS,

  1016.     .pix_fmts       = (const enum PixelFormat[]){ PIX_FMT_YUV422P,

  1017.                                                   PIX_FMT_YUV422P10,

  1018.                                                   PIX_FMT_NONE },

  1019.     .long_name      = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),

  1020.     .priv_class     = &class,

  1021.     .defaults       = dnxhd_defaults,

  1022. };