/*
  * Apple ProRes encoder
  *
  * Copyright (c) 2011 Anatoliy Wasserman
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**

  * @file
  * Apple ProRes encoder (Anatoliy Wasserman version)

  * Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy)
  */
 
 #include "avcodec.h"

 #include "dct.h"

 #include "internal.h"

 #include "put_bits.h"

 #include "bytestream.h"

 #include "dsputil.h"
 
 #define DEFAULT_SLICE_MB_WIDTH 8
 
 #define FF_PROFILE_PRORES_PROXY     0
 #define FF_PROFILE_PRORES_LT        1
 #define FF_PROFILE_PRORES_STANDARD  2
 #define FF_PROFILE_PRORES_HQ        3
 
 static const AVProfile profiles[] = {
     { FF_PROFILE_PRORES_PROXY,    "apco"},
     { FF_PROFILE_PRORES_LT,       "apcs"},
     { FF_PROFILE_PRORES_STANDARD, "apcn"},
     { FF_PROFILE_PRORES_HQ,       "apch"},
     { FF_PROFILE_UNKNOWN }
 };
 
 static const int qp_start_table[4] = { 4, 1, 1, 1 };
 static const int qp_end_table[4]   = { 8, 9, 6, 6 };
 static const int bitrate_table[5]  = { 1000, 2100, 3500, 5400 };
 
 static const uint8_t progressive_scan[64] = {
      0,  1,  8,  9,  2,  3, 10, 11,
     16, 17, 24, 25, 18, 19, 26, 27,
      4,  5, 12, 20, 13,  6,  7, 14,
     21, 28, 29, 22, 15, 23, 30, 31,
     32, 33, 40, 48, 41, 34, 35, 42,
     49, 56, 57, 50, 43, 36, 37, 44,
     51, 58, 59, 52, 45, 38, 39, 46,
     53, 60, 61, 54, 47, 55, 62, 63
 };
 
 static const uint8_t QMAT_LUMA[4][64] = {
     {
          4,  7,  9, 11, 13, 14, 15, 63,
          7,  7, 11, 12, 14, 15, 63, 63,
          9, 11, 13, 14, 15, 63, 63, 63,
         11, 11, 13, 14, 63, 63, 63, 63,
         11, 13, 14, 63, 63, 63, 63, 63,
         13, 14, 63, 63, 63, 63, 63, 63,
         13, 63, 63, 63, 63, 63, 63, 63,
         63, 63, 63, 63, 63, 63, 63, 63
     }, {
          4,  5,  6,  7,  9, 11, 13, 15,
          5,  5,  7,  8, 11, 13, 15, 17,
          6,  7,  9, 11, 13, 15, 15, 17,
          7,  7,  9, 11, 13, 15, 17, 19,
          7,  9, 11, 13, 14, 16, 19, 23,
          9, 11, 13, 14, 16, 19, 23, 29,
          9, 11, 13, 15, 17, 21, 28, 35,
         11, 13, 16, 17, 21, 28, 35, 41
     }, {
          4,  4,  5,  5,  6,  7,  7,  9,
          4,  4,  5,  6,  7,  7,  9,  9,
          5,  5,  6,  7,  7,  9,  9, 10,
          5,  5,  6,  7,  7,  9,  9, 10,
          5,  6,  7,  7,  8,  9, 10, 12,
          6,  7,  7,  8,  9, 10, 12, 15,
          6,  7,  7,  9, 10, 11, 14, 17,
          7,  7,  9, 10, 11, 14, 17, 21
     }, {
          4,  4,  4,  4,  4,  4,  4,  4,
          4,  4,  4,  4,  4,  4,  4,  4,
          4,  4,  4,  4,  4,  4,  4,  4,
          4,  4,  4,  4,  4,  4,  4,  5,
          4,  4,  4,  4,  4,  4,  5,  5,
          4,  4,  4,  4,  4,  5,  5,  6,
          4,  4,  4,  4,  5,  5,  6,  7,
          4,  4,  4,  4,  5,  6,  7,  7
     }
 };
 
 static const uint8_t QMAT_CHROMA[4][64] = {
     {
          4,  7,  9, 11, 13, 14, 63, 63,
          7,  7, 11, 12, 14, 63, 63, 63,
          9, 11, 13, 14, 63, 63, 63, 63,
         11, 11, 13, 14, 63, 63, 63, 63,
         11, 13, 14, 63, 63, 63, 63, 63,
         13, 14, 63, 63, 63, 63, 63, 63,
         13, 63, 63, 63, 63, 63, 63, 63,
         63, 63, 63, 63, 63, 63, 63, 63
     }, {
          4,  5,  6,  7,  9, 11, 13, 15,
          5,  5,  7,  8, 11, 13, 15, 17,
          6,  7,  9, 11, 13, 15, 15, 17,
          7,  7,  9, 11, 13, 15, 17, 19,
          7,  9, 11, 13, 14, 16, 19, 23,
          9, 11, 13, 14, 16, 19, 23, 29,
          9, 11, 13, 15, 17, 21, 28, 35,
         11, 13, 16, 17, 21, 28, 35, 41
     }, {
          4,  4,  5,  5,  6,  7,  7,  9,
          4,  4,  5,  6,  7,  7,  9,  9,
          5,  5,  6,  7,  7,  9,  9, 10,
          5,  5,  6,  7,  7,  9,  9, 10,
          5,  6,  7,  7,  8,  9, 10, 12,
          6,  7,  7,  8,  9, 10, 12, 15,
          6,  7,  7,  9, 10, 11, 14, 17,
          7,  7,  9, 10, 11, 14, 17, 21
     }, {
          4,  4,  4,  4,  4,  4,  4,  4,
          4,  4,  4,  4,  4,  4,  4,  4,
          4,  4,  4,  4,  4,  4,  4,  4,
          4,  4,  4,  4,  4,  4,  4,  5,
          4,  4,  4,  4,  4,  4,  5,  5,
          4,  4,  4,  4,  4,  5,  5,  6,
          4,  4,  4,  4,  5,  5,  6,  7,
          4,  4,  4,  4,  5,  6,  7,  7
     }
 };
 
 
 typedef struct {
     uint8_t* fill_y;
     uint8_t* fill_u;
     uint8_t* fill_v;
 
     int qmat_luma[16][64];
     int qmat_chroma[16][64];
 } ProresContext;
 
 static void encode_codeword(PutBitContext *pb, int val, int codebook)
 {
     unsigned int rice_order, exp_order, switch_bits, first_exp, exp, zeros,
             mask;
 
     /* number of bits to switch between rice and exp golomb */
     switch_bits = codebook & 3;
     rice_order  = codebook >> 5;
     exp_order   = (codebook >> 2) & 7;
 
     first_exp = ((switch_bits + 1) << rice_order);
 
     if (val >= first_exp) { /* exp golomb */
         val -= first_exp;
         val += (1 << exp_order);
         exp = av_log2(val);
         zeros = exp - exp_order + switch_bits + 1;
         put_bits(pb, zeros, 0);

         put_bits(pb, exp + 1, val);

     } else if (rice_order) {
         mask = (1 << rice_order) - 1;
         put_bits(pb, (val >> rice_order), 0);
         put_bits(pb, 1, 1);
         put_bits(pb, rice_order, val & mask);
     } else {
         put_bits(pb, val, 0);
         put_bits(pb, 1, 1);
     }
 }
 
 #define QSCALE(qmat,ind,val) ((val) / (qmat[ind]))
 #define TO_GOLOMB(val) ((val << 1) ^ (val >> 31))
 #define DIFF_SIGN(val, sign) ((val >> 31) ^ sign)
 #define IS_NEGATIVE(val) (((val >> 31) ^ -1) + 1)
 #define TO_GOLOMB2(val,sign) (val==0 ? 0 : (val << 1) + sign)
 
 static av_always_inline int get_level(int val)
 {
     int sign = (val >> 31);
     return (val ^ sign) - sign;
 }
 
 #define FIRST_DC_CB 0xB8
 
 static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};
 

 static void encode_dc_coeffs(PutBitContext *pb, int16_t *in,

         int blocks_per_slice, int *qmat)
 {
     int prev_dc, code;
     int i, sign, idx;
     int new_dc, delta, diff_sign, new_code;
 
     prev_dc = QSCALE(qmat, 0, in[0] - 16384);
     code = TO_GOLOMB(prev_dc);
     encode_codeword(pb, code, FIRST_DC_CB);
 
     code = 5; sign = 0; idx = 64;
     for (i = 1; i < blocks_per_slice; i++, idx += 64) {
         new_dc    = QSCALE(qmat, 0, in[idx] - 16384);
         delta     = new_dc - prev_dc;
         diff_sign = DIFF_SIGN(delta, sign);
         new_code  = TO_GOLOMB2(get_level(delta), diff_sign);
 
         encode_codeword(pb, new_code, dc_codebook[FFMIN(code, 6)]);
 
         code      = new_code;
         sign      = delta >> 31;
         prev_dc   = new_dc;
     }
 }
 
 static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29,
         0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
 static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28,
         0x28, 0x28, 0x28, 0x4C };
 
 static void encode_ac_coeffs(AVCodecContext *avctx, PutBitContext *pb,

         int16_t *in, int blocks_per_slice, int *qmat)

 {
     int prev_run = 4;
     int prev_level = 2;
 

     int run = 0, level, code, i, j;
     for (i = 1; i < 64; i++) {

         int indp = progressive_scan[i];

         for (j = 0; j < blocks_per_slice; j++) {

             int val = QSCALE(qmat, indp, in[(j << 6) + indp]);
             if (val) {
                 encode_codeword(pb, run, run_to_cb[FFMIN(prev_run, 15)]);
 
                 prev_run   = run;
                 run        = 0;
                 level      = get_level(val);
                 code       = level - 1;
 
                 encode_codeword(pb, code, lev_to_cb[FFMIN(prev_level, 9)]);
 
                 prev_level = level;
 
                 put_bits(pb, 1, IS_NEGATIVE(val));
             } else {
                 ++run;
             }
         }
     }
 }
 

 static void get(uint8_t *pixels, int stride, int16_t* block)

 {
     int16_t *p = (int16_t*)pixels;
     int i, j;
 
     stride >>= 1;
     for (i = 0; i < 8; i++) {
         for (j = 0; j < 8; j++) {
             block[j] = p[j];
         }
         p += stride;
         block += 8;
     }
 }
 

 static void fdct_get(uint8_t *pixels, int stride, int16_t* block)

 {
     get(pixels, stride, block);
     ff_jpeg_fdct_islow_10(block);
 }
 
 static int encode_slice_plane(AVCodecContext *avctx, int mb_count,
         uint8_t *src, int src_stride, uint8_t *buf, unsigned buf_size,
         int *qmat, int chroma)
 {

     DECLARE_ALIGNED(16, int16_t, blocks)[DEFAULT_SLICE_MB_WIDTH << 8], *block;

     int i, blocks_per_slice;
     PutBitContext pb;
 
     block = blocks;
     for (i = 0; i < mb_count; i++) {
         fdct_get(src,                  src_stride, block + (0 << 6));
         fdct_get(src + 8 * src_stride, src_stride, block + ((2 - chroma) << 6));
         if (!chroma) {
             fdct_get(src + 16,                  src_stride, block + (1 << 6));
             fdct_get(src + 16 + 8 * src_stride, src_stride, block + (3 << 6));
         }
 
         block += (256 >> chroma);
         src   += (32  >> chroma);
     }
 
     blocks_per_slice = mb_count << (2 - chroma);

     init_put_bits(&pb, buf, buf_size);

 
     encode_dc_coeffs(&pb, blocks, blocks_per_slice, qmat);
     encode_ac_coeffs(avctx, &pb, blocks, blocks_per_slice, qmat);
 
     flush_put_bits(&pb);
     return put_bits_ptr(&pb) - pb.buf;
 }
 
 static av_always_inline unsigned encode_slice_data(AVCodecContext *avctx,
         uint8_t *dest_y, uint8_t *dest_u, uint8_t *dest_v, int luma_stride,
         int chroma_stride, unsigned mb_count, uint8_t *buf, unsigned data_size,
         unsigned* y_data_size, unsigned* u_data_size, unsigned* v_data_size,
         int qp)
 {

     ProresContext* ctx = avctx->priv_data;

 
     *y_data_size = encode_slice_plane(avctx, mb_count, dest_y, luma_stride,
             buf, data_size, ctx->qmat_luma[qp - 1], 0);
 
     if (!(avctx->flags & CODEC_FLAG_GRAY)) {
         *u_data_size = encode_slice_plane(avctx, mb_count, dest_u,
                 chroma_stride, buf + *y_data_size, data_size - *y_data_size,
                 ctx->qmat_chroma[qp - 1], 1);
 
         *v_data_size = encode_slice_plane(avctx, mb_count, dest_v,
                 chroma_stride, buf + *y_data_size + *u_data_size,
                 data_size - *y_data_size - *u_data_size,
                 ctx->qmat_chroma[qp - 1], 1);
     }
 
     return *y_data_size + *u_data_size + *v_data_size;
 }
 
 static void subimage_with_fill(uint16_t *src, unsigned x, unsigned y,
         unsigned stride, unsigned width, unsigned height, uint16_t *dst,
         unsigned dst_width, unsigned dst_height)
 {
 
     int box_width = FFMIN(width - x, dst_width);
     int box_height = FFMIN(height - y, dst_height);
     int i, j, src_stride = stride >> 1;
     uint16_t last_pix, *last_line;
 
     src += y * src_stride + x;
     for (i = 0; i < box_height; ++i) {
         for (j = 0; j < box_width; ++j) {
             dst[j] = src[j];
         }
         last_pix = dst[j - 1];
         for (; j < dst_width; j++)
             dst[j] = last_pix;
         src += src_stride;
         dst += dst_width;
     }
     last_line = dst - dst_width;
     for (; i < dst_height; i++) {
         for (j = 0; j < dst_width; ++j) {
             dst[j] = last_line[j];
         }
         dst += dst_width;
     }
 }
 

 static int encode_slice(AVCodecContext *avctx, const AVFrame *pic, int mb_x,

         int mb_y, unsigned mb_count, uint8_t *buf, unsigned data_size,
         int unsafe, int *qp)
 {
     int luma_stride, chroma_stride;
     int hdr_size = 6, slice_size;
     uint8_t *dest_y, *dest_u, *dest_v;
     unsigned y_data_size = 0, u_data_size = 0, v_data_size = 0;

     ProresContext* ctx = avctx->priv_data;

     int tgt_bits   = (mb_count * bitrate_table[avctx->profile]) >> 2;
     int low_bytes  = (tgt_bits - (tgt_bits >> 3)) >> 3; // 12% bitrate fluctuation
     int high_bytes = (tgt_bits + (tgt_bits >> 3)) >> 3;
 
     luma_stride   = pic->linesize[0];
     chroma_stride = pic->linesize[1];
 
     dest_y = pic->data[0] + (mb_y << 4) * luma_stride   + (mb_x << 5);
     dest_u = pic->data[1] + (mb_y << 4) * chroma_stride + (mb_x << 4);
     dest_v = pic->data[2] + (mb_y << 4) * chroma_stride + (mb_x << 4);
 
     if (unsafe) {
 
         subimage_with_fill((uint16_t *) pic->data[0], mb_x << 4, mb_y << 4,
                 luma_stride, avctx->width, avctx->height,
                 (uint16_t *) ctx->fill_y, mb_count << 4, 16);
         subimage_with_fill((uint16_t *) pic->data[1], mb_x << 3, mb_y << 4,
                 chroma_stride, avctx->width >> 1, avctx->height,
                 (uint16_t *) ctx->fill_u, mb_count << 3, 16);
         subimage_with_fill((uint16_t *) pic->data[2], mb_x << 3, mb_y << 4,
                 chroma_stride, avctx->width >> 1, avctx->height,
                 (uint16_t *) ctx->fill_v, mb_count << 3, 16);
 
         encode_slice_data(avctx, ctx->fill_y, ctx->fill_u, ctx->fill_v,
                 mb_count << 5, mb_count << 4, mb_count, buf + hdr_size,
                 data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,
                 *qp);
     } else {
         slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
                 luma_stride, chroma_stride, mb_count, buf + hdr_size,
                 data_size - hdr_size, &y_data_size, &u_data_size, &v_data_size,
                 *qp);
 
         if (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]) {
             do {
                 *qp += 1;
                 slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
                         luma_stride, chroma_stride, mb_count, buf + hdr_size,
                         data_size - hdr_size, &y_data_size, &u_data_size,
                         &v_data_size, *qp);
             } while (slice_size > high_bytes && *qp < qp_end_table[avctx->profile]);
         } else if (slice_size < low_bytes && *qp
                 > qp_start_table[avctx->profile]) {
             do {
                 *qp -= 1;
                 slice_size = encode_slice_data(avctx, dest_y, dest_u, dest_v,
                         luma_stride, chroma_stride, mb_count, buf + hdr_size,
                         data_size - hdr_size, &y_data_size, &u_data_size,
                         &v_data_size, *qp);
             } while (slice_size < low_bytes && *qp > qp_start_table[avctx->profile]);
         }
     }
 
     buf[0] = hdr_size << 3;
     buf[1] = *qp;
     AV_WB16(buf + 2, y_data_size);
     AV_WB16(buf + 4, u_data_size);
 
     return hdr_size + y_data_size + u_data_size + v_data_size;
 }
 

 static int prores_encode_picture(AVCodecContext *avctx, const AVFrame *pic,

         uint8_t *buf, const int buf_size)
 {
     int mb_width = (avctx->width + 15) >> 4;
     int mb_height = (avctx->height + 15) >> 4;

     int hdr_size, sl_size, i;

     int mb_y, sl_data_size, qp;

     int unsafe_bot, unsafe_right;

     uint8_t *sl_data, *sl_data_sizes;

     int slice_per_line = 0, rem = mb_width;
 

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

         slice_per_line += rem >> i;
         rem &= (1 << i) - 1;
     }
 
     qp = qp_start_table[avctx->profile];

     hdr_size = 8; sl_data_size = buf_size - hdr_size;
     sl_data_sizes = buf + hdr_size;
     sl_data = sl_data_sizes + (slice_per_line * mb_height * 2);

     for (mb_y = 0; mb_y < mb_height; mb_y++) {
         int mb_x = 0;
         int slice_mb_count = DEFAULT_SLICE_MB_WIDTH;
         while (mb_x < mb_width) {
             while (mb_width - mb_x < slice_mb_count)
                 slice_mb_count >>= 1;
 
             unsafe_bot = (avctx->height & 0xf) && (mb_y == mb_height - 1);
             unsafe_right = (avctx->width & 0xf) && (mb_x + slice_mb_count == mb_width);
 
             sl_size = encode_slice(avctx, pic, mb_x, mb_y, slice_mb_count,
                     sl_data, sl_data_size, unsafe_bot || unsafe_right, &qp);
 

             bytestream_put_be16(&sl_data_sizes, sl_size);

             sl_data           += sl_size;
             sl_data_size      -= sl_size;
             mb_x              += slice_mb_count;
         }
     }
 
     buf[0] = hdr_size << 3;
     AV_WB32(buf + 1, sl_data - buf);
     AV_WB16(buf + 5, slice_per_line * mb_height);
     buf[7] = av_log2(DEFAULT_SLICE_MB_WIDTH) << 4;
 
     return sl_data - buf;
 }
 

 static int prores_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                const AVFrame *pict, int *got_packet)

 {
     int header_size = 148;

     uint8_t *buf;
     int pic_size, ret;
     int frame_size = FFALIGN(avctx->width, 16) * FFALIGN(avctx->height, 16)*16 + 500 + FF_MIN_BUFFER_SIZE; //FIXME choose tighter limit
 
 

     if ((ret = ff_alloc_packet2(avctx, pkt, frame_size + FF_MIN_BUFFER_SIZE)) < 0)

         return ret;
 
     buf = pkt->data;
     pic_size = prores_encode_picture(avctx, pict, buf + header_size + 8,
             pkt->size - header_size - 8);

     bytestream_put_be32(&buf, pic_size + 8 + header_size);
     bytestream_put_buffer(&buf, "icpf", 4);
 
     bytestream_put_be16(&buf, header_size);
     bytestream_put_be16(&buf, 0);
     bytestream_put_buffer(&buf, "fmpg", 4);

     bytestream_put_be16(&buf, avctx->width);
     bytestream_put_be16(&buf, avctx->height);

     *buf++ = 0x83; // {10}(422){00}{00}(frame){11}
     *buf++ = 0;
     *buf++ = 2;
     *buf++ = 2;
     *buf++ = 6;
     *buf++ = 32;
     *buf++ = 0;
     *buf++ = 3;
 
     bytestream_put_buffer(&buf, QMAT_LUMA[avctx->profile],   64);
     bytestream_put_buffer(&buf, QMAT_CHROMA[avctx->profile], 64);

     pkt->flags |= AV_PKT_FLAG_KEY;
     pkt->size = pic_size + 8 + header_size;
     *got_packet = 1;
 
     return 0;

 }
 
 static void scale_mat(const uint8_t* src, int* dst, int scale)
 {
     int i;
     for (i = 0; i < 64; i++)
         dst[i] = src[i] * scale;
 }
 
 static av_cold int prores_encode_init(AVCodecContext *avctx)
 {
     int i;

     ProresContext* ctx = avctx->priv_data;

     if (avctx->pix_fmt != AV_PIX_FMT_YUV422P10) {

         av_log(avctx, AV_LOG_ERROR, "need YUV422P10\n");
         return -1;
     }
     if (avctx->width & 0x1) {
         av_log(avctx, AV_LOG_ERROR,
                 "frame width needs to be multiple of 2\n");
         return -1;
     }
 
     if ((avctx->height & 0xf) || (avctx->width & 0xf)) {

         ctx->fill_y = av_malloc(4 * (DEFAULT_SLICE_MB_WIDTH << 8));
         if (!ctx->fill_y)
             return AVERROR(ENOMEM);
         ctx->fill_u = ctx->fill_y + (DEFAULT_SLICE_MB_WIDTH << 9);
         ctx->fill_v = ctx->fill_u + (DEFAULT_SLICE_MB_WIDTH << 8);

     }
 
     if (avctx->profile == FF_PROFILE_UNKNOWN) {
         avctx->profile = FF_PROFILE_PRORES_STANDARD;
         av_log(avctx, AV_LOG_INFO,
                 "encoding with ProRes standard (apcn) profile\n");
 
     } else if (avctx->profile < FF_PROFILE_PRORES_PROXY
             || avctx->profile > FF_PROFILE_PRORES_HQ) {
         av_log(
                 avctx,
                 AV_LOG_ERROR,
                 "unknown profile %d, use [0 - apco, 1 - apcs, 2 - apcn (default), 3 - apch]\n",
                 avctx->profile);
         return -1;
     }
 
     avctx->codec_tag = AV_RL32((const uint8_t*)profiles[avctx->profile].name);
 
     for (i = 1; i <= 16; i++) {
         scale_mat(QMAT_LUMA[avctx->profile]  , ctx->qmat_luma[i - 1]  , i);
         scale_mat(QMAT_CHROMA[avctx->profile], ctx->qmat_chroma[i - 1], i);
     }
 

     avctx->coded_frame = av_frame_alloc();

     avctx->coded_frame->key_frame = 1;
     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
 
     return 0;
 }
 
 static av_cold int prores_encode_close(AVCodecContext *avctx)
 {

     ProresContext* ctx = avctx->priv_data;

     av_freep(&avctx->coded_frame);

     av_freep(&ctx->fill_y);

 
     return 0;
 }
 

 AVCodec ff_prores_aw_encoder = {
     .name           = "prores_aw",

     .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_PRORES,

     .priv_data_size = sizeof(ProresContext),
     .init           = prores_encode_init,
     .close          = prores_encode_close,

     .encode2        = prores_encode_frame,

     .pix_fmts       = (const enum AVPixelFormat[]){AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE},

     .capabilities   = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,

     .profiles       = profiles
 };
 

 AVCodec ff_prores_encoder = {
     .name           = "prores",

     .long_name      = NULL_IF_CONFIG_SMALL("Apple ProRes"),

     .type           = AVMEDIA_TYPE_VIDEO,

     .id             = AV_CODEC_ID_PRORES,

     .priv_data_size = sizeof(ProresContext),
     .init           = prores_encode_init,
     .close          = prores_encode_close,

     .encode2        = prores_encode_frame,

     .pix_fmts       = (const enum AVPixelFormat[]){AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE},

     .capabilities   = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,

     .profiles       = profiles
 };