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FFmpeg/libavcodec/proresenc.c

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  1. /*

  2.  * Apple ProRes encoder

  3.  *

  4.  * Copyright (c) 2011 Anatoliy Wasserman

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file libavcodec/proresenc.c

  25.  * Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy)

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "put_bits.h"

  30. #include "dsputil.h"

  31. 

  32. #define DEFAULT_SLICE_MB_WIDTH 8

  33. 

  34. #define FF_PROFILE_PRORES_PROXY     0

  35. #define FF_PROFILE_PRORES_LT        1

  36. #define FF_PROFILE_PRORES_STANDARD  2

  37. #define FF_PROFILE_PRORES_HQ        3

  38. 

  39. static const AVProfile profiles[] = {

  40.     { FF_PROFILE_PRORES_PROXY,    "apco"},

  41.     { FF_PROFILE_PRORES_LT,       "apcs"},

  42.     { FF_PROFILE_PRORES_STANDARD, "apcn"},

  43.     { FF_PROFILE_PRORES_HQ,       "apch"},

  44.     { FF_PROFILE_UNKNOWN }

  45. };

  46. 

  47. static const int qp_start_table[4] = { 4, 1, 1, 1 };

  48. static const int qp_end_table[4]   = { 8, 9, 6, 6 };

  49. static const int bitrate_table[5]  = { 1000, 2100, 3500, 5400 };

  50. 

  51. static const uint8_t progressive_scan[64] = {

  52.      0,  1,  8,  9,  2,  3, 10, 11,

  53.     16, 17, 24, 25, 18, 19, 26, 27,

  54.      4,  5, 12, 20, 13,  6,  7, 14,

  55.     21, 28, 29, 22, 15, 23, 30, 31,

  56.     32, 33, 40, 48, 41, 34, 35, 42,

  57.     49, 56, 57, 50, 43, 36, 37, 44,

  58.     51, 58, 59, 52, 45, 38, 39, 46,

  59.     53, 60, 61, 54, 47, 55, 62, 63

  60. };

  61. 

  62. static const uint8_t QMAT_LUMA[4][64] = {

  63.     {

  64.          4,  7,  9, 11, 13, 14, 15, 63,

  65.          7,  7, 11, 12, 14, 15, 63, 63,

  66.          9, 11, 13, 14, 15, 63, 63, 63,

  67.         11, 11, 13, 14, 63, 63, 63, 63,

  68.         11, 13, 14, 63, 63, 63, 63, 63,

  69.         13, 14, 63, 63, 63, 63, 63, 63,

  70.         13, 63, 63, 63, 63, 63, 63, 63,

  71.         63, 63, 63, 63, 63, 63, 63, 63

  72.     }, {

  73.          4,  5,  6,  7,  9, 11, 13, 15,

  74.          5,  5,  7,  8, 11, 13, 15, 17,

  75.          6,  7,  9, 11, 13, 15, 15, 17,

  76.          7,  7,  9, 11, 13, 15, 17, 19,

  77.          7,  9, 11, 13, 14, 16, 19, 23,

  78.          9, 11, 13, 14, 16, 19, 23, 29,

  79.          9, 11, 13, 15, 17, 21, 28, 35,

  80.         11, 13, 16, 17, 21, 28, 35, 41

  81.     }, {

  82.          4,  4,  5,  5,  6,  7,  7,  9,

  83.          4,  4,  5,  6,  7,  7,  9,  9,

  84.          5,  5,  6,  7,  7,  9,  9, 10,

  85.          5,  5,  6,  7,  7,  9,  9, 10,

  86.          5,  6,  7,  7,  8,  9, 10, 12,

  87.          6,  7,  7,  8,  9, 10, 12, 15,

  88.          6,  7,  7,  9, 10, 11, 14, 17,

  89.          7,  7,  9, 10, 11, 14, 17, 21

  90.     }, {

  91.          4,  4,  4,  4,  4,  4,  4,  4,

  92.          4,  4,  4,  4,  4,  4,  4,  4,

  93.          4,  4,  4,  4,  4,  4,  4,  4,

  94.          4,  4,  4,  4,  4,  4,  4,  5,

  95.          4,  4,  4,  4,  4,  4,  5,  5,

  96.          4,  4,  4,  4,  4,  5,  5,  6,

  97.          4,  4,  4,  4,  5,  5,  6,  7,

  98.          4,  4,  4,  4,  5,  6,  7,  7

  99.     }

  100. };

  101. 

  102. static const uint8_t QMAT_CHROMA[4][64] = {

  103.     {

  104.          4,  7,  9, 11, 13, 14, 63, 63,

  105.          7,  7, 11, 12, 14, 63, 63, 63,

  106.          9, 11, 13, 14, 63, 63, 63, 63,

  107.         11, 11, 13, 14, 63, 63, 63, 63,

  108.         11, 13, 14, 63, 63, 63, 63, 63,

  109.         13, 14, 63, 63, 63, 63, 63, 63,

  110.         13, 63, 63, 63, 63, 63, 63, 63,

  111.         63, 63, 63, 63, 63, 63, 63, 63

  112.     }, {

  113.          4,  5,  6,  7,  9, 11, 13, 15,

  114.          5,  5,  7,  8, 11, 13, 15, 17,

  115.          6,  7,  9, 11, 13, 15, 15, 17,

  116.          7,  7,  9, 11, 13, 15, 17, 19,

  117.          7,  9, 11, 13, 14, 16, 19, 23,

  118.          9, 11, 13, 14, 16, 19, 23, 29,

  119.          9, 11, 13, 15, 17, 21, 28, 35,

  120.         11, 13, 16, 17, 21, 28, 35, 41

  121.     }, {

  122.          4,  4,  5,  5,  6,  7,  7,  9,

  123.          4,  4,  5,  6,  7,  7,  9,  9,

  124.          5,  5,  6,  7,  7,  9,  9, 10,

  125.          5,  5,  6,  7,  7,  9,  9, 10,

  126.          5,  6,  7,  7,  8,  9, 10, 12,

  127.          6,  7,  7,  8,  9, 10, 12, 15,

  128.          6,  7,  7,  9, 10, 11, 14, 17,

  129.          7,  7,  9, 10, 11, 14, 17, 21

  130.     }, {

  131.          4,  4,  4,  4,  4,  4,  4,  4,

  132.          4,  4,  4,  4,  4,  4,  4,  4,

  133.          4,  4,  4,  4,  4,  4,  4,  4,

  134.          4,  4,  4,  4,  4,  4,  4,  5,

  135.          4,  4,  4,  4,  4,  4,  5,  5,

  136.          4,  4,  4,  4,  4,  5,  5,  6,

  137.          4,  4,  4,  4,  5,  5,  6,  7,

  138.          4,  4,  4,  4,  5,  6,  7,  7

  139.     }

  140. };

  141. 

  142. 

  143. typedef struct {

  144.     uint8_t* fill_y;

  145.     uint8_t* fill_u;

  146.     uint8_t* fill_v;

  147. 

  148.     int qmat_luma[16][64];

  149.     int qmat_chroma[16][64];

  150. } ProresContext;

  151. 

  152. static void encode_codeword(PutBitContext *pb, int val, int codebook)

  153. {

  154.     unsigned int rice_order, exp_order, switch_bits, first_exp, exp, zeros,

  155.             mask;

  156. 

  157.     /* number of bits to switch between rice and exp golomb */

  158.     switch_bits = codebook & 3;

  159.     rice_order  = codebook >> 5;

  160.     exp_order   = (codebook >> 2) & 7;

  161. 

  162.     first_exp = ((switch_bits + 1) << rice_order);

  163. 

  164.     if (val >= first_exp) { /* exp golomb */

  165.         val -= first_exp;

  166.         val += (1 << exp_order);

  167.         exp = av_log2(val);

  168.         zeros = exp - exp_order + switch_bits + 1;

  169.         put_bits(pb, zeros, 0);

  170.         put_bits(pb, 1, 1);

  171.         put_bits(pb, exp, val);

  172.     } else if (rice_order) {

  173.         mask = (1 << rice_order) - 1;

  174.         put_bits(pb, (val >> rice_order), 0);

  175.         put_bits(pb, 1, 1);

  176.         put_bits(pb, rice_order, val & mask);

  177.     } else {

  178.         put_bits(pb, val, 0);

  179.         put_bits(pb, 1, 1);

  180.     }

  181. }

  182. 

  183. #define QSCALE(qmat,ind,val) ((val) / (qmat[ind]))

  184. #define TO_GOLOMB(val) ((val << 1) ^ (val >> 31))

  185. #define DIFF_SIGN(val, sign) ((val >> 31) ^ sign)

  186. #define IS_NEGATIVE(val) (((val >> 31) ^ -1) + 1)

  187. #define TO_GOLOMB2(val,sign) (val==0 ? 0 : (val << 1) + sign)

  188. 

  189. static av_always_inline int get_level(int val)

  190. {

  191.     int sign = (val >> 31);

  192.     return (val ^ sign) - sign;

  193. }

  194. 

  195. #define FIRST_DC_CB 0xB8

  196. 

  197. static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};

  198. 

  199. static void encode_dc_coeffs(PutBitContext *pb, DCTELEM *in,

  200.         int blocks_per_slice, int *qmat)

  201. {

  202.     int prev_dc, code;

  203.     int i, sign, idx;

  204.     int new_dc, delta, diff_sign, new_code;

  205. 

  206.     prev_dc = QSCALE(qmat, 0, in[0] - 16384);

  207.     code = TO_GOLOMB(prev_dc);

  208.     encode_codeword(pb, code, FIRST_DC_CB);

  209. 

  210.     code = 5; sign = 0; idx = 64;

  211.     for (i = 1; i < blocks_per_slice; i++, idx += 64) {

  212.         new_dc    = QSCALE(qmat, 0, in[idx] - 16384);

  213.         delta     = new_dc - prev_dc;

  214.         diff_sign = DIFF_SIGN(delta, sign);

  215.         new_code  = TO_GOLOMB2(get_level(delta), diff_sign);

  216. 

  217.         encode_codeword(pb, new_code, dc_codebook[FFMIN(code, 6)]);

  218. 

  219.         code      = new_code;

  220.         sign      = delta >> 31;

  221.         prev_dc   = new_dc;

  222.     }

  223. }

  224. 

  225. static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29,

  226.         0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };

  227. static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28,

  228.         0x28, 0x28, 0x28, 0x4C };

  229. 

  230. static void encode_ac_coeffs(AVCodecContext *avctx, PutBitContext *pb,

  231.         DCTELEM *in, int blocks_per_slice, int *qmat)

  232. {

  233.     int prev_run = 4;

  234.     int prev_level = 2;

  235. 

  236.     int run = 0, level, code;

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

  238.         int indp = progressive_scan[i];

  239.         for (int j = 0; j < blocks_per_slice; j++) {

  240.             int val = QSCALE(qmat, indp, in[(j << 6) + indp]);

  241.             if (val) {

  242.                 encode_codeword(pb, run, run_to_cb[FFMIN(prev_run, 15)]);

  243. 

  244.                 prev_run   = run;

  245.                 run        = 0;

  246.                 level      = get_level(val);

  247.                 code       = level - 1;

  248. 

  249.                 encode_codeword(pb, code, lev_to_cb[FFMIN(prev_level, 9)]);

  250. 

  251.                 prev_level = level;

  252. 

  253.                 put_bits(pb, 1, IS_NEGATIVE(val));

  254.             } else {

  255.                 ++run;

  256.             }

  257.         }

  258.     }

  259. }

  260. 

  261. static void get(uint8_t *pixels, int stride, DCTELEM* block)

  262. {

  263.     int16_t *p = (int16_t*)pixels;

  264.     int i, j;

  265. 

  266.     stride >>= 1;

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

  268.         for (j = 0; j < 8; j++) {

  269.             block[j] = p[j];

  270.         }

  271.         p += stride;

  272.         block += 8;

  273.     }

  274. }

  275. 

  276. static void fdct_get(uint8_t *pixels, int stride, DCTELEM* block)

  277. {

  278.     get(pixels, stride, block);

  279.     ff_jpeg_fdct_islow_10(block);

  280. }

  281. 

  282. static int encode_slice_plane(AVCodecContext *avctx, int mb_count,

  283.         uint8_t *src, int src_stride, uint8_t *buf, unsigned buf_size,

  284.         int *qmat, int chroma)

  285. {

  286.     DECLARE_ALIGNED(16, DCTELEM, blocks)[DEFAULT_SLICE_MB_WIDTH << 8], *block;

  287.     int i, blocks_per_slice;

  288.     PutBitContext pb;

  289. 

  290.     block = blocks;

  291.     for (i = 0; i < mb_count; i++) {

  292.         fdct_get(src,                  src_stride, block + (0 << 6));

  293.         fdct_get(src + 8 * src_stride, src_stride, block + ((2 - chroma) << 6));

  294.         if (!chroma) {

  295.             fdct_get(src + 16,                  src_stride, block + (1 << 6));

  296.             fdct_get(src + 16 + 8 * src_stride, src_stride, block + (3 << 6));

  297.         }

  298. 

  299.         block += (256 >> chroma);

  300.         src   += (32  >> chroma);

  301.     }

  302. 

  303.     blocks_per_slice = mb_count << (2 - chroma);

  304.     init_put_bits(&pb, buf, buf_size << 3);

  305. 

  306.     encode_dc_coeffs(&pb, blocks, blocks_per_slice, qmat);

  307.     encode_ac_coeffs(avctx, &pb, blocks, blocks_per_slice, qmat);

  308. 

  309.     flush_put_bits(&pb);

  310.     return put_bits_ptr(&pb) - pb.buf;

  311. }

  312. 

  313. static av_always_inline unsigned encode_slice_data(AVCodecContext *avctx,

  314.         uint8_t *dest_y, uint8_t *dest_u, uint8_t *dest_v, int luma_stride,

  315.         int chroma_stride, unsigned mb_count, uint8_t *buf, unsigned data_size,

  316.         unsigned* y_data_size, unsigned* u_data_size, unsigned* v_data_size,

  317.         int qp)

  318. {

  319.     ProresContext* ctx = avctx->priv_data;

  320. 

  321.     *y_data_size = encode_slice_plane(avctx, mb_count, dest_y, luma_stride,

  322.             buf, data_size, ctx->qmat_luma[qp - 1], 0);

  323. 

  324.     if (!(avctx->flags & CODEC_FLAG_GRAY)) {

  325.         *u_data_size = encode_slice_plane(avctx, mb_count, dest_u,

  326.                 chroma_stride, buf + *y_data_size, data_size - *y_data_size,

  327.                 ctx->qmat_chroma[qp - 1], 1);

  328. 

  329.         *v_data_size = encode_slice_plane(avctx, mb_count, dest_v,

  330.                 chroma_stride, buf + *y_data_size + *u_data_size,

  331.                 data_size - *y_data_size - *u_data_size,

  332.                 ctx->qmat_chroma[qp - 1], 1);

  333.     }

  334. 

  335.     return *y_data_size + *u_data_size + *v_data_size;

  336. }

  337. 

  338. static void subimage_with_fill(uint16_t *src, unsigned x, unsigned y,

  339.         unsigned stride, unsigned width, unsigned height, uint16_t *dst,

  340.         unsigned dst_width, unsigned dst_height)

  341. {

  342. 

  343.     int box_width = FFMIN(width - x, dst_width);

  344.     int box_height = FFMIN(height - y, dst_height);

  345.     int i, j, src_stride = stride >> 1;

  346.     uint16_t last_pix, *last_line;

  347. 

  348.     src += y * src_stride + x;

  349.     for (i = 0; i < box_height; ++i) {

  350.         for (j = 0; j < box_width; ++j) {

  351.             dst[j] = src[j];

  352.         }

  353.         last_pix = dst[j - 1];

  354.         for (; j < dst_width; j++)

  355.             dst[j] = last_pix;

  356.         src += src_stride;

  357.         dst += dst_width;

  358.     }

  359.     last_line = dst - dst_width;

  360.     for (; i < dst_height; i++) {

  361.         for (j = 0; j < dst_width; ++j) {

  362.             dst[j] = last_line[j];

  363.         }

  364.         dst += dst_width;

  365.     }

  366. }

  367. 

  368. static int encode_slice(AVCodecContext *avctx, AVFrame *pic, int mb_x,

  369.         int mb_y, unsigned mb_count, uint8_t *buf, unsigned data_size,

  370.         int unsafe, int *qp)

  371. {

  372.     int luma_stride, chroma_stride;

  373.     int hdr_size = 6, slice_size;

  374.     uint8_t *dest_y, *dest_u, *dest_v;

  375.     unsigned y_data_size = 0, u_data_size = 0, v_data_size = 0;

  376.     ProresContext* ctx = avctx->priv_data;

  377.     int tgt_bits   = (mb_count * bitrate_table[avctx->profile]) >> 2;

  378.     int low_bytes  = (tgt_bits - (tgt_bits >> 3)) >> 3; // 12% bitrate fluctuation

  379.     int high_bytes = (tgt_bits + (tgt_bits >> 3)) >> 3;

  380. 

  381.     luma_stride   = pic->linesize[0];

  382.     chroma_stride = pic->linesize[1];

  383. 

  384.     dest_y = pic->data[0] + (mb_y << 4) * luma_stride   + (mb_x << 5);

  385.     dest_u = pic->data[1] + (mb_y << 4) * chroma_stride + (mb_x << 4);

  386.     dest_v = pic->data[2] + (mb_y << 4) * chroma_stride + (mb_x << 4);

  387. 

  388.     if (unsafe) {

  389. 

  390.         subimage_with_fill((uint16_t *) pic->data[0], mb_x << 4, mb_y << 4,

  391.                 luma_stride, avctx->width, avctx->height,

  392.                 (uint16_t *) ctx->fill_y, mb_count << 4, 16);

  393.         subimage_with_fill((uint16_t *) pic->data[1], mb_x << 3, mb_y << 4,

  394.                 chroma_stride, avctx->width >> 1, avctx->height,

  395.                 (uint16_t *) ctx->fill_u, mb_count << 3, 16);

  396.         subimage_with_fill((uint16_t *) pic->data[2], mb_x << 3, mb_y << 4,

  397.                 chroma_stride, avctx->width >> 1, avctx->height,

  398.                 (uint16_t *) ctx->fill_v, mb_count << 3, 16);

  399. 

  400.         encode_slice_data(avctx, ctx->fill_y, ctx->fill_u, ctx->fill_v,

  401.                 mb_count << 5, mb_count << 4, mb_count, buf + hdr_size,

  402.                 data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,

  403.                 *qp);

  404.     } else {

  405.         slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,

  406.                 luma_stride, chroma_stride, mb_count, buf + hdr_size,

  407.                 data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,

  408.                 *qp);

  409. 

  410.         if (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]) {

  411.             do {

  412.                 *qp += 1;

  413.                 slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,

  414.                         luma_stride, chroma_stride, mb_count, buf + hdr_size,

  415.                         data_size - hdr_size, &y_data_size, &u_data_size,

  416.                         &v_data_size, *qp);

  417.             } while (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]);

  418.         } else if (slice_size < low_bytes && *qp

  419.                 > qp_start_table[avctx->profile]) {

  420.             do {

  421.                 *qp -= 1;

  422.                 slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,

  423.                         luma_stride, chroma_stride, mb_count, buf + hdr_size,

  424.                         data_size - hdr_size, &y_data_size, &u_data_size,

  425.                         &v_data_size, *qp);

  426.             } while (slice_size < low_bytes && *qp > qp_start_table[avctx->profile]);

  427.         }

  428.     }

  429. 

  430.     buf[0] = hdr_size << 3;

  431.     buf[1] = *qp;

  432.     AV_WB16(buf + 2, y_data_size);

  433.     AV_WB16(buf + 4, u_data_size);

  434. 

  435.     return hdr_size + y_data_size + u_data_size + v_data_size;

  436. }

  437. 

  438. static int prores_encode_picture(AVCodecContext *avctx, AVFrame *pic,

  439.         uint8_t *buf, const int buf_size)

  440. {

  441.     int mb_width = (avctx->width + 15) >> 4;

  442.     int mb_height = (avctx->height + 15) >> 4;

  443.     int hdr_size, sl_size, *slice_sizes;

  444.     int sl, mb_y, sl_data_size, qp;

  445.     int unsafe_bot, unsafe_right;

  446.     uint8_t *sl_data;

  447.     int slice_per_line = 0, rem = mb_width;

  448. 

  449.     for (int i = av_log2(DEFAULT_SLICE_MB_WIDTH); i >= 0; --i) {

  450.         slice_per_line += rem >> i;

  451.         rem &= (1 << i) - 1;

  452.     }

  453. 

  454.     qp = qp_start_table[avctx->profile];

  455.     slice_sizes = av_malloc(slice_per_line * mb_height * sizeof(int));

  456.     sl = 0; hdr_size = 8; sl_data_size = buf_size - hdr_size;

  457.     sl_data = buf + hdr_size + (slice_per_line * mb_height * 2);

  458.     for (mb_y = 0; mb_y < mb_height; mb_y++) {

  459.         int mb_x = 0;

  460.         int slice_mb_count = DEFAULT_SLICE_MB_WIDTH;

  461.         while (mb_x < mb_width) {

  462.             while (mb_width - mb_x < slice_mb_count)

  463.                 slice_mb_count >>= 1;

  464. 

  465.             unsafe_bot = (avctx->height & 0xf) && (mb_y == mb_height - 1);

  466.             unsafe_right = (avctx->width & 0xf) && (mb_x + slice_mb_count == mb_width);

  467. 

  468.             sl_size = encode_slice(avctx, pic, mb_x, mb_y, slice_mb_count,

  469.                     sl_data, sl_data_size, unsafe_bot || unsafe_right, &qp);

  470. 

  471.             slice_sizes[sl++]  = sl_size;

  472.             sl_data           += sl_size;

  473.             sl_data_size      -= sl_size;

  474.             mb_x              += slice_mb_count;

  475.         }

  476.     }

  477. 

  478.     buf[0] = hdr_size << 3;

  479.     AV_WB32(buf + 1, sl_data - buf);

  480.     AV_WB16(buf + 5, slice_per_line * mb_height);

  481.     buf[7] = av_log2(DEFAULT_SLICE_MB_WIDTH) << 4;

  482. 

  483.     for (int i = 0; i < slice_per_line * mb_height; i++)

  484.         AV_WB16(buf + hdr_size + (i << 1), slice_sizes[i]);

  485. 

  486.     av_free(slice_sizes);

  487. 

  488.     return sl_data - buf;

  489. }

  490. 

  491. static int prores_encode_frame(AVCodecContext *avctx, unsigned char *buf,

  492.         int buf_size, void *data)

  493. {

  494.     AVFrame *pic = data;

  495. 

  496.     int header_size = 148;

  497.     int pic_size = prores_encode_picture(avctx, pic, buf + header_size + 8,

  498.             buf_size - header_size - 8);

  499. 

  500.     bytestream_put_be32(&buf, pic_size + 8 + header_size);

  501.     bytestream_put_buffer(&buf, "icpf", 4);

  502. 

  503.     bytestream_put_be16(&buf, header_size);

  504.     bytestream_put_be16(&buf, 0);

  505.     bytestream_put_buffer(&buf, "fmpg", 4);

  506.     bytestream_put_be16(&buf, pic->width);

  507.     bytestream_put_be16(&buf, pic->height);

  508.     *buf++ = 0x83; // {10}(422){00}{00}(frame){11}

  509.     *buf++ = 0;

  510.     *buf++ = 2;

  511.     *buf++ = 2;

  512.     *buf++ = 6;

  513.     *buf++ = 32;

  514.     *buf++ = 0;

  515.     *buf++ = 3;

  516. 

  517.     bytestream_put_buffer(&buf, QMAT_LUMA[avctx->profile],   64);

  518.     bytestream_put_buffer(&buf, QMAT_CHROMA[avctx->profile], 64);

  519. 

  520.     return pic_size + 8 + header_size;

  521. }

  522. 

  523. static void scale_mat(const uint8_t* src, int* dst, int scale)

  524. {

  525.     int i;

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

  527.         dst[i] = src[i] * scale;

  528. }

  529. 

  530. static av_cold int prores_encode_init(AVCodecContext *avctx)

  531. {

  532.     int i;

  533.     ProresContext* ctx = avctx->priv_data;

  534. 

  535.     if (avctx->pix_fmt != PIX_FMT_YUV422P10LE) {

  536.         av_log(avctx, AV_LOG_ERROR, "need YUV422P10\n");

  537.         return -1;

  538.     }

  539.     if (avctx->width & 0x1) {

  540.         av_log(avctx, AV_LOG_ERROR,

  541.                 "frame width needs to be multiple of 2\n");

  542.         return -1;

  543.     }

  544. 

  545.     if ((avctx->height & 0xf) || (avctx->width & 0xf)) {

  546.         ctx->fill_y = av_malloc(4 * (DEFAULT_SLICE_MB_WIDTH << 8));

  547.         if (!ctx->fill_y)

  548.             return AVERROR(ENOMEM);

  549.         ctx->fill_u = ctx->fill_y + (DEFAULT_SLICE_MB_WIDTH << 9);

  550.         ctx->fill_v = ctx->fill_u + (DEFAULT_SLICE_MB_WIDTH << 8);

  551.     }

  552. 

  553.     if (avctx->profile == FF_PROFILE_UNKNOWN) {

  554.         avctx->profile = FF_PROFILE_PRORES_STANDARD;

  555.         av_log(avctx, AV_LOG_INFO,

  556.                 "encoding with ProRes standard (apcn) profile\n");

  557. 

  558.     } else if (avctx->profile < FF_PROFILE_PRORES_PROXY

  559.             || avctx->profile > FF_PROFILE_PRORES_HQ) {

  560.         av_log(

  561.                 avctx,

  562.                 AV_LOG_ERROR,

  563.                 "unknown profile %d, use [0 - apco, 1 - apcs, 2 - apcn (default), 3 - apch]\n",

  564.                 avctx->profile);

  565.         return -1;

  566.     }

  567. 

  568.     avctx->codec_tag = AV_RL32((const uint8_t*)profiles[avctx->profile].name);

  569. 

  570.     for (i = 1; i <= 16; i++) {

  571.         scale_mat(QMAT_LUMA[avctx->profile]  , ctx->qmat_luma[i - 1]  , i);

  572.         scale_mat(QMAT_CHROMA[avctx->profile], ctx->qmat_chroma[i - 1], i);

  573.     }

  574. 

  575.     avctx->coded_frame = avcodec_alloc_frame();

  576.     avctx->coded_frame->key_frame = 1;

  577.     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

  578. 

  579.     return 0;

  580. }

  581. 

  582. static av_cold int prores_encode_close(AVCodecContext *avctx)

  583. {

  584.     ProresContext* ctx = avctx->priv_data;

  585.     av_freep(&avctx->coded_frame);

  586.     av_freep(&ctx->fill_y);

  587. 

  588.     return 0;

  589. }

  590. 

  591. AVCodec ff_prores_encoder = {

  592.     .name           = "prores",

  593.     .type           = AVMEDIA_TYPE_VIDEO,

  594.     .id             = CODEC_ID_PRORES,

  595.     .priv_data_size = sizeof(ProresContext),

  596.     .init           = prores_encode_init,

  597.     .close          = prores_encode_close,

  598.     .encode         = prores_encode_frame,

  599.     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_YUV422P10LE, PIX_FMT_NONE},

  600.     .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes"),

  601.     .capabilities   = 0,

  602.     .profiles       = profiles

  603. };