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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 "dnxhddata.h"

  31. 

  32. typedef struct {

  33.     uint16_t mb;

  34.     int value;

  35. } RCCMPEntry;

  36. 

  37. typedef struct {

  38.     int ssd;

  39.     int bits;

  40. } RCEntry;

  41. 

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

  43. 

  44. typedef struct DNXHDEncContext {

  45.     MpegEncContext m; ///< Used for quantization dsp functions

  46. 

  47.     AVFrame frame;

  48.     int cid;

  49.     const CIDEntry *cid_table;

  50.     uint8_t *msip; ///< Macroblock Scan Indices Payload

  51.     uint32_t *slice_size;

  52. 

  53.     struct DNXHDEncContext *thread[MAX_THREADS];

  54. 

  55.     unsigned dct_y_offset;

  56.     unsigned dct_uv_offset;

  57.     int interlaced;

  58.     int cur_field;

  59. 

  60.     DECLARE_ALIGNED_16(DCTELEM, blocks[8][64]);

  61. 

  62.     int      (*qmatrix_c)     [64];

  63.     int      (*qmatrix_l)     [64];

  64.     uint16_t (*qmatrix_l16)[2][64];

  65.     uint16_t (*qmatrix_c16)[2][64];

  66. 

  67.     unsigned frame_bits;

  68.     uint8_t *src[3];

  69. 

  70.     uint16_t *table_vlc_codes;

  71.     uint8_t  *table_vlc_bits;

  72.     uint16_t *table_run_codes;

  73.     uint8_t  *table_run_bits;

  74. 

  75.     /** Rate control */

  76.     unsigned slice_bits;

  77.     unsigned qscale;

  78.     unsigned lambda;

  79. 

  80.     unsigned thread_size;

  81. 

  82.     uint16_t *mb_bits;

  83.     uint8_t  *mb_qscale;

  84. 

  85.     RCCMPEntry *mb_cmp;

  86.     RCEntry   (*mb_rc)[8160];

  87. } DNXHDEncContext;

  88. 

  89. #define LAMBDA_FRAC_BITS 10

  90. 

  91. static int dnxhd_init_vlc(DNXHDEncContext *ctx)

  92. {

  93.     int i;

  94. 

  95.     CHECKED_ALLOCZ(ctx->table_vlc_codes, 449*2);

  96.     CHECKED_ALLOCZ(ctx->table_vlc_bits,    449);

  97.     CHECKED_ALLOCZ(ctx->table_run_codes,  63*2);

  98.     CHECKED_ALLOCZ(ctx->table_run_bits,     63);

  99. 

  100.     for (i = 0; i < 257; i++) {

  101.         int level = ctx->cid_table->ac_level[i] +

  102.             (ctx->cid_table->ac_run_flag[i] << 7) + (ctx->cid_table->ac_index_flag[i] << 8);

  103.         assert(level < 449);

  104.         if (ctx->cid_table->ac_level[i] == 64 && ctx->cid_table->ac_index_flag[i])

  105.             level -= 64; // use 0+(1<<8) level

  106.         ctx->table_vlc_codes[level] = ctx->cid_table->ac_codes[i];

  107.         ctx->table_vlc_bits [level] = ctx->cid_table->ac_bits[i];

  108.     }

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

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

  111.         assert(run < 63);

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

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

  114.     }

  115.     return 0;

  116.  fail:

  117.     return -1;

  118. }

  119. 

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

  121. {

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

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

  124.     int qscale, i;

  125. 

  126.     CHECKED_ALLOCZ(ctx->qmatrix_l,   (ctx->m.avctx->qmax+1) * 64 * sizeof(int));

  127.     CHECKED_ALLOCZ(ctx->qmatrix_c,   (ctx->m.avctx->qmax+1) * 64 * sizeof(int));

  128.     CHECKED_ALLOCZ(ctx->qmatrix_l16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));

  129.     CHECKED_ALLOCZ(ctx->qmatrix_c16, (ctx->m.avctx->qmax+1) * 64 * 2 * sizeof(uint16_t));

  130. 

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

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

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

  134.     }

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

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

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

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

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

  140.     }

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

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

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

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

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

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

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

  148.         }

  149.     }

  150.     return 0;

  151.  fail:

  152.     return -1;

  153. }

  154. 

  155. static int dnxhd_init_rc(DNXHDEncContext *ctx)

  156. {

  157.     CHECKED_ALLOCZ(ctx->mb_rc, 8160*ctx->m.avctx->qmax*sizeof(RCEntry));

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

  159.         CHECKED_ALLOCZ(ctx->mb_cmp, ctx->m.mb_num*sizeof(RCCMPEntry));

  160. 

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

  162.     ctx->qscale = 1;

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

  164.     return 0;

  165.  fail:

  166.     return -1;

  167. }

  168. 

  169. static int dnxhd_encode_init(AVCodecContext *avctx)

  170. {

  171.     DNXHDEncContext *ctx = avctx->priv_data;

  172.     int i, index;

  173. 

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

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

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

  177.         return -1;

  178.     }

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

  180. 

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

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

  183. 

  184.     ctx->m.avctx = avctx;

  185.     ctx->m.mb_intra = 1;

  186.     ctx->m.h263_aic = 1;

  187. 

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

  189.     ff_dct_common_init(&ctx->m);

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

  191.         ctx->m.dct_quantize = dct_quantize_c;

  192. 

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

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

  195. 

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

  197.         ctx->interlaced = 1;

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

  199.     }

  200. 

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

  202. 

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

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

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

  206.         return -1;

  207. 

  208.     if (dnxhd_init_vlc(ctx) < 0)

  209.         return -1;

  210.     if (dnxhd_init_rc(ctx) < 0)

  211.         return -1;

  212. 

  213.     CHECKED_ALLOCZ(ctx->slice_size, ctx->m.mb_height*sizeof(uint32_t));

  214.     CHECKED_ALLOCZ(ctx->mb_bits,    ctx->m.mb_num   *sizeof(uint16_t));

  215.     CHECKED_ALLOCZ(ctx->mb_qscale,  ctx->m.mb_num   *sizeof(uint8_t));

  216. 

  217.     ctx->frame.key_frame = 1;

  218.     ctx->frame.pict_type = FF_I_TYPE;

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

  220. 

  221.     if (avctx->thread_count > MAX_THREADS || (avctx->thread_count > ctx->m.mb_height)) {

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

  223.         return -1;

  224.     }

  225. 

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

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

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

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

  230.     }

  231. 

  232.     for (i = 0; i < avctx->thread_count; i++) {

  233.         ctx->thread[i]->m.start_mb_y = (ctx->m.mb_height*(i  ) + avctx->thread_count/2) / avctx->thread_count;

  234.         ctx->thread[i]->m.end_mb_y   = (ctx->m.mb_height*(i+1) + avctx->thread_count/2) / avctx->thread_count;

  235.     }

  236. 

  237.     return 0;

  238.  fail: //for CHECKED_ALLOCZ

  239.     return -1;

  240. }

  241. 

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

  243. {

  244.     DNXHDEncContext *ctx = avctx->priv_data;

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

  246. 

  247.     memcpy(buf, header_prefix, 5);

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

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

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

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

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

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

  254. 

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

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

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

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

  259. 

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

  261. 

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

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

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

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

  266. 

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

  268.     return 0;

  269. }

  270. 

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

  272. {

  273.     int nbits;

  274.     if (diff < 0) {

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

  276.         diff--;

  277.     } else {

  278.         nbits = av_log2_16bit(2*diff);

  279.     }

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

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

  282. }

  283. 

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

  285. {

  286.     int last_non_zero = 0;

  287.     int offset = 0;

  288.     int slevel, i, j;

  289. 

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

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

  292. 

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

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

  295.         slevel = block[j];

  296.         if (slevel) {

  297.             int run_level = i - last_non_zero - 1;

  298.             int sign;

  299.             MASK_ABS(sign, slevel);

  300.             if (slevel > 64) {

  301.                 offset = (slevel-1) >> 6;

  302.                 slevel = 256 | (slevel & 63); // level 64 is treated as 0

  303.             }

  304.             if (run_level)

  305.                 slevel |= 128;

  306.             put_bits(&ctx->m.pb, ctx->table_vlc_bits[slevel]+1, (ctx->table_vlc_codes[slevel]<<1)|(sign&1));

  307.             if (offset) {

  308.                 put_bits(&ctx->m.pb, 4, offset);

  309.                 offset = 0;

  310.             }

  311.             if (run_level)

  312.                 put_bits(&ctx->m.pb, ctx->table_run_bits[run_level], ctx->table_run_codes[run_level]);

  313.             last_non_zero = i;

  314.         }

  315.     }

  316.     put_bits(&ctx->m.pb, ctx->table_vlc_bits[0], ctx->table_vlc_codes[0]); // EOB

  317. }

  318. 

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

  320. {

  321.     const uint8_t *weight_matrix;

  322.     int level;

  323.     int i;

  324. 

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

  326. 

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

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

  329.         level = block[j];

  330.         if (level) {

  331.             if (level < 0) {

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

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

  334.                     level += 32;

  335.                 level >>= 6;

  336.                 level = -level;

  337.             } else {

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

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

  340.                     level += 32;

  341.                 level >>= 6;

  342.             }

  343.             block[j] = level;

  344.         }

  345.     }

  346. }

  347. 

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

  349. {

  350.     int score = 0;

  351.     int i;

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

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

  354.     return score;

  355. }

  356. 

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

  358. {

  359.     int last_non_zero = 0;

  360.     int bits = 0;

  361.     int i, j, level;

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

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

  364.         level = block[j];

  365.         if (level) {

  366.             int run_level = i - last_non_zero - 1;

  367.             level = FFABS(level);

  368.             if (level > 64) {

  369.                 level = 256 | (level & 63); // level 64 is treated as 0

  370.                 bits += 4;

  371.             }

  372.             level |= (!!run_level)<<7;

  373.             bits += ctx->table_vlc_bits[level]+1 + ctx->table_run_bits[run_level];

  374.             last_non_zero = i;

  375.         }

  376.     }

  377.     return bits;

  378. }

  379. 

  380. static av_always_inline void dnxhd_get_pixels_4x8(DCTELEM *restrict block, const uint8_t *pixels, int line_size)

  381. {

  382.     int i;

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

  384.         block[0] = pixels[0];

  385.         block[1] = pixels[1];

  386.         block[2] = pixels[2];

  387.         block[3] = pixels[3];

  388.         block[4] = pixels[4];

  389.         block[5] = pixels[5];

  390.         block[6] = pixels[6];

  391.         block[7] = pixels[7];

  392.         pixels += line_size;

  393.         block += 8;

  394.     }

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

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

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

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

  399. }

  400. 

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

  402. {

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

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

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

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

  407. 

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

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

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

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

  412. 

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

  414.         if (ctx->interlaced) {

  415.             dnxhd_get_pixels_4x8(ctx->blocks[4], ptr_y + ctx->dct_y_offset    , ctx->m.linesize);

  416.             dnxhd_get_pixels_4x8(ctx->blocks[5], ptr_y + ctx->dct_y_offset + 8, ctx->m.linesize);

  417.             dnxhd_get_pixels_4x8(ctx->blocks[6], ptr_u + ctx->dct_uv_offset   , ctx->m.uvlinesize);

  418.             dnxhd_get_pixels_4x8(ctx->blocks[7], ptr_v + ctx->dct_uv_offset   , ctx->m.uvlinesize);

  419.         } else

  420.             memset(ctx->blocks[4], 0, 4*64*sizeof(DCTELEM));

  421.     } else {

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

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

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

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

  426.     }

  427. }

  428. 

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

  430. {

  431.     if (i&2) {

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

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

  434.         return 1 + (i&1);

  435.     } else {

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

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

  438.         return 0;

  439.     }

  440. }

  441. 

  442. static int dnxhd_calc_bits_thread(AVCodecContext *avctx, void *arg)

  443. {

  444.     DNXHDEncContext *ctx = arg;

  445.     int mb_y, mb_x;

  446.     int qscale = ctx->thread[0]->qscale;

  447. 

  448.     for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {

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

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

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

  452. 

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

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

  455.             int ssd     = 0;

  456.             int ac_bits = 0;

  457.             int dc_bits = 0;

  458.             int i;

  459. 

  460.             dnxhd_get_blocks(ctx, mb_x, mb_y);

  461. 

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

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

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

  465.                 int overflow, nbits, diff, last_index;

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

  467. 

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

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

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

  471. 

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

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

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

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

  476. 

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

  478. 

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

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

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

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

  483.                 }

  484.             }

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

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

  487.         }

  488.     }

  489.     return 0;

  490. }

  491. 

  492. static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg)

  493. {

  494.     DNXHDEncContext *ctx = arg;

  495.     int mb_y, mb_x;

  496. 

  497.     for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {

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

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

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

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

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

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

  504.             int i;

  505. 

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

  507. 

  508.             dnxhd_get_blocks(ctx, mb_x, mb_y);

  509. 

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

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

  512.                 int last_index, overflow;

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

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

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

  516.             }

  517.         }

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

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

  520.     }

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

  522.     return 0;

  523. }

  524. 

  525. static void dnxhd_setup_threads_slices(DNXHDEncContext *ctx, uint8_t *buf)

  526. {

  527.     int mb_y, mb_x;

  528.     int i, offset = 0;

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

  530.         int thread_size = 0;

  531.         for (mb_y = ctx->thread[i]->m.start_mb_y; mb_y < ctx->thread[i]->m.end_mb_y; mb_y++) {

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

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

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

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

  536.             }

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

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

  539.             thread_size += ctx->slice_size[mb_y];

  540.         }

  541.         init_put_bits(&ctx->thread[i]->m.pb, buf + 640 + offset, thread_size);

  542.         offset += thread_size;

  543.     }

  544. }

  545. 

  546. static int dnxhd_mb_var_thread(AVCodecContext *avctx, void *arg)

  547. {

  548.     DNXHDEncContext *ctx = arg;

  549.     int mb_y, mb_x;

  550.     for (mb_y = ctx->m.start_mb_y; mb_y < ctx->m.end_mb_y; mb_y++) {

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

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

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

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

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

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

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

  558.         }

  559.     }

  560.     return 0;

  561. }

  562. 

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

  564. {

  565.     int lambda, up_step, down_step;

  566.     int last_lower = INT_MAX, last_higher = 0;

  567.     int x, y, q;

  568. 

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

  570.         ctx->qscale = q;

  571.         avctx->execute(avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);

  572.     }

  573.     up_step = down_step = 2<<LAMBDA_FRAC_BITS;

  574.     lambda = ctx->lambda;

  575. 

  576.     for (;;) {

  577.         int bits = 0;

  578.         int end = 0;

  579.         if (lambda == last_higher) {

  580.             lambda++;

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

  582.         }

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

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

  585.                 unsigned min = UINT_MAX;

  586.                 int qscale = 1;

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

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

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

  590.                     if (score < min) {

  591.                         min = score;

  592.                         qscale = q;

  593.                     }

  594.                 }

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

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

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

  598.             }

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

  600.             if (bits > ctx->frame_bits)

  601.                 break;

  602.         }

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

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

  605.         if (end) {

  606.             if (bits > ctx->frame_bits)

  607.                 return -1;

  608.             break;

  609.         }

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

  611.             last_lower = FFMIN(lambda, last_lower);

  612.             if (last_higher != 0)

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

  614.             else

  615.                 lambda -= down_step;

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

  617.             up_step = 1<<LAMBDA_FRAC_BITS;

  618.             lambda = FFMAX(1, lambda);

  619.             if (lambda == last_lower)

  620.                 break;

  621.         } else {

  622.             last_higher = FFMAX(lambda, last_higher);

  623.             if (last_lower != INT_MAX)

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

  625.             else

  626.                 lambda += up_step;

  627.             up_step *= 5;

  628.             down_step = 1<<LAMBDA_FRAC_BITS;

  629.         }

  630.     }

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

  632.     ctx->lambda = lambda;

  633.     return 0;

  634. }

  635. 

  636. static int dnxhd_find_qscale(DNXHDEncContext *ctx)

  637. {

  638.     int bits = 0;

  639.     int up_step = 1;

  640.     int down_step = 1;

  641.     int last_higher = 0;

  642.     int last_lower = INT_MAX;

  643.     int qscale;

  644.     int x, y;

  645. 

  646.     qscale = ctx->qscale;

  647.     for (;;) {

  648.         bits = 0;

  649.         ctx->qscale = qscale;

  650.         // XXX avoid recalculating bits

  651.         ctx->m.avctx->execute(ctx->m.avctx, dnxhd_calc_bits_thread, (void**)&ctx->thread[0], NULL, ctx->m.avctx->thread_count);

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

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

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

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

  656.             if (bits > ctx->frame_bits)

  657.                 break;

  658.         }

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

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

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

  662.             if (qscale == 1)

  663.                 return 1;

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

  665.                 qscale = last_higher;

  666.                 break;

  667.             }

  668.             last_lower = FFMIN(qscale, last_lower);

  669.             if (last_higher != 0)

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

  671.             else

  672.                 qscale -= down_step++;

  673.             if (qscale < 1)

  674.                 qscale = 1;

  675.             up_step = 1;

  676.         } else {

  677.             if (last_lower == qscale + 1)

  678.                 break;

  679.             last_higher = FFMAX(qscale, last_higher);

  680.             if (last_lower != INT_MAX)

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

  682.             else

  683.                 qscale += up_step++;

  684.             down_step = 1;

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

  686.                 return -1;

  687.         }

  688.     }

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

  690.     ctx->qscale = qscale;

  691.     return 0;

  692. }

  693. 

  694. static int dnxhd_rc_cmp(const void *a, const void *b)

  695. {

  696.     return ((const RCCMPEntry *)b)->value - ((const RCCMPEntry *)a)->value;

  697. }

  698. 

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

  700. {

  701.     int max_bits = 0;

  702.     int ret, x, y;

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

  704.         return -1;

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

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

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

  708.             int delta_bits;

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

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

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

  712.             if (!RC_VARIANCE) {

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

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

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

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

  717.                     : INT_MIN; //avoid increasing qscale

  718.             }

  719.         }

  720.         max_bits += 31; //worst padding

  721.     }

  722.     if (!ret) {

  723.         if (RC_VARIANCE)

  724.             avctx->execute(avctx, dnxhd_mb_var_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);

  725.         qsort(ctx->mb_cmp, ctx->m.mb_num, sizeof(RCEntry), dnxhd_rc_cmp);

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

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

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

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

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

  731.         }

  732.     }

  733.     return 0;

  734. }

  735. 

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

  737. {

  738.     int i;

  739. 

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

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

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

  743.     }

  744. 

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

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

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

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

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

  750.     }

  751. 

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

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

  754. }

  755. 

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

  757. {

  758.     DNXHDEncContext *ctx = avctx->priv_data;

  759.     int first_field = 1;

  760.     int offset, i, ret;

  761. 

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

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

  764.         return -1;

  765.     }

  766. 

  767.     dnxhd_load_picture(ctx, data);

  768. 

  769.  encode_coding_unit:

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

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

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

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

  774.     }

  775. 

  776.     dnxhd_write_header(avctx, buf);

  777. 

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

  779.         ret = dnxhd_encode_rdo(avctx, ctx);

  780.     else

  781.         ret = dnxhd_encode_fast(avctx, ctx);

  782.     if (ret < 0) {

  783.         av_log(avctx, AV_LOG_ERROR, "picture could not fit ratecontrol constraints\n");

  784.         return -1;

  785.     }

  786. 

  787.     dnxhd_setup_threads_slices(ctx, buf);

  788. 

  789.     offset = 0;

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

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

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

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

  794.     }

  795. 

  796.     avctx->execute(avctx, dnxhd_encode_thread, (void**)&ctx->thread[0], NULL, avctx->thread_count);

  797. 

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

  799. 

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

  801.         first_field     = 0;

  802.         ctx->cur_field ^= 1;

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

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

  805.         goto encode_coding_unit;

  806.     }

  807. 

  808.     return ctx->cid_table->frame_size;

  809. }

  810. 

  811. static int dnxhd_encode_end(AVCodecContext *avctx)

  812. {

  813.     DNXHDEncContext *ctx = avctx->priv_data;

  814.     int i;

  815. 

  816.     av_freep(&ctx->table_vlc_codes);

  817.     av_freep(&ctx->table_vlc_bits);

  818.     av_freep(&ctx->table_run_codes);

  819.     av_freep(&ctx->table_run_bits);

  820. 

  821.     av_freep(&ctx->mb_bits);

  822.     av_freep(&ctx->mb_qscale);

  823.     av_freep(&ctx->mb_rc);

  824.     av_freep(&ctx->mb_cmp);

  825.     av_freep(&ctx->slice_size);

  826. 

  827.     av_freep(&ctx->qmatrix_c);

  828.     av_freep(&ctx->qmatrix_l);

  829.     av_freep(&ctx->qmatrix_c16);

  830.     av_freep(&ctx->qmatrix_l16);

  831. 

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

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

  834. 

  835.     return 0;

  836. }

  837. 

  838. AVCodec dnxhd_encoder = {

  839.     "dnxhd",

  840.     CODEC_TYPE_VIDEO,

  841.     CODEC_ID_DNXHD,

  842.     sizeof(DNXHDEncContext),

  843.     dnxhd_encode_init,

  844.     dnxhd_encode_picture,

  845.     dnxhd_encode_end,

  846.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV422P, -1},

  847. };