text: /*
   * V210 encoder
   *
   * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
   * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
   *
   * 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
   */
  
  #include "avcodec.h"
  #include "bytestream.h"
  #include "internal.h"
  #include "v210enc.h"
  
  #define CLIP(v) av_clip(v, 4, 1019)
  #define CLIP8(v) av_clip(v, 1, 254)
  
  #define WRITE_PIXELS(a, b, c)           \
      do {                                \
          val  =  CLIP(*a++);             \
          val |= (CLIP(*b++) << 10) |     \
                 (CLIP(*c++) << 20);      \
          AV_WL32(dst, val);              \
          dst += 4;                       \
      } while (0)
  
  #define WRITE_PIXELS8(a, b, c)          \
      do {                                \
          val  = (CLIP8(*a++) << 2);      \
          val |= (CLIP8(*b++) << 12) |    \
                 (CLIP8(*c++) << 22);     \
          AV_WL32(dst, val);              \
          dst += 4;                       \
      } while (0)
  
  static void v210_planar_pack_8_c(const uint8_t *y, const uint8_t *u,
                                   const uint8_t *v, uint8_t *dst,
                                   ptrdiff_t width)
  {
      uint32_t val;
      int i;
  
      /* unroll this to match the assembly */
      for (i = 0; i < width - 11; i += 12) {
          WRITE_PIXELS8(u, y, v);
          WRITE_PIXELS8(y, u, y);
          WRITE_PIXELS8(v, y, u);
          WRITE_PIXELS8(y, v, y);
          WRITE_PIXELS8(u, y, v);
          WRITE_PIXELS8(y, u, y);
          WRITE_PIXELS8(v, y, u);
          WRITE_PIXELS8(y, v, y);
      }
  }
  
  static void v210_planar_pack_10_c(const uint16_t *y, const uint16_t *u,
                                    const uint16_t *v, uint8_t *dst,
                                    ptrdiff_t width)
  {
      uint32_t val;
      int i;
  
      for (i = 0; i < width - 5; i += 6) {
          WRITE_PIXELS(u, y, v);
          WRITE_PIXELS(y, u, y);
          WRITE_PIXELS(v, y, u);
          WRITE_PIXELS(y, v, y);
      }
  }
  
  av_cold void ff_v210enc_init(V210EncContext *s)
  {
      s->pack_line_8  = v210_planar_pack_8_c;
      s->pack_line_10 = v210_planar_pack_10_c;
  
      if (ARCH_X86)
          ff_v210enc_init_x86(s);
  }
  
  static av_cold int encode_init(AVCodecContext *avctx)
  {
      V210EncContext *s = avctx->priv_data;
  
      if (avctx->width & 1) {
          av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
          return AVERROR(EINVAL);
      }
  
  #if FF_API_CODED_FRAME
  FF_DISABLE_DEPRECATION_WARNINGS
      avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
  
      ff_v210enc_init(s);
  
      return 0;
  }
  
  static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                          const AVFrame *pic, int *got_packet)
  {
      V210EncContext *s = avctx->priv_data;
      int aligned_width = ((avctx->width + 47) / 48) * 48;
      int stride = aligned_width * 8 / 3;
      int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
      int h, w, ret;
      uint8_t *dst;
  
      ret = ff_alloc_packet2(avctx, pkt, avctx->height * stride, avctx->height * stride);
      if (ret < 0) {
          av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
          return ret;
      }
      dst = pkt->data;
  
      if (pic->format == AV_PIX_FMT_YUV422P10) {
          const uint16_t *y = (const uint16_t *)pic->data[0];
          const uint16_t *u = (const uint16_t *)pic->data[1];
          const uint16_t *v = (const uint16_t *)pic->data[2];
          for (h = 0; h < avctx->height; h++) {
              uint32_t val;
              w = (avctx->width / 6) * 6;
              s->pack_line_10(y, u, v, dst, w);
  
              y += w;
              u += w >> 1;
              v += w >> 1;
              dst += (w / 6) * 16;
              if (w < avctx->width - 1) {
                  WRITE_PIXELS(u, y, v);
  
                  val = CLIP(*y++);
                  if (w == avctx->width - 2) {
                      AV_WL32(dst, val);
                      dst += 4;
                  }
              }
              if (w < avctx->width - 3) {
                  val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
                  AV_WL32(dst, val);
                  dst += 4;
  
                  val = CLIP(*v++) | (CLIP(*y++) << 10);
                  AV_WL32(dst, val);
                  dst += 4;
              }
  
              memset(dst, 0, line_padding);
              dst += line_padding;
              y += pic->linesize[0] / 2 - avctx->width;
              u += pic->linesize[1] / 2 - avctx->width / 2;
              v += pic->linesize[2] / 2 - avctx->width / 2;
          }
      } else if(pic->format == AV_PIX_FMT_YUV422P) {
          const uint8_t *y = pic->data[0];
          const uint8_t *u = pic->data[1];
          const uint8_t *v = pic->data[2];
          for (h = 0; h < avctx->height; h++) {
              uint32_t val;
              w = (avctx->width / 12) * 12;
              s->pack_line_8(y, u, v, dst, w);
  
              y += w;
              u += w >> 1;
              v += w >> 1;
              dst += (w / 12) * 32;
  
              for (; w < avctx->width - 5; w += 6) {
                  WRITE_PIXELS8(u, y, v);
                  WRITE_PIXELS8(y, u, y);
                  WRITE_PIXELS8(v, y, u);
                  WRITE_PIXELS8(y, v, y);
              }
              if (w < avctx->width - 1) {
                  WRITE_PIXELS8(u, y, v);
  
                  val = CLIP8(*y++) << 2;
                  if (w == avctx->width - 2) {
                      AV_WL32(dst, val);
                      dst += 4;
                  }
              }
              if (w < avctx->width - 3) {
                  val |= (CLIP8(*u++) << 12) | (CLIP8(*y++) << 22);
                  AV_WL32(dst, val);
                  dst += 4;
  
                  val = (CLIP8(*v++) << 2) | (CLIP8(*y++) << 12);
                  AV_WL32(dst, val);
                  dst += 4;
              }
              memset(dst, 0, line_padding);
              dst += line_padding;
  
              y += pic->linesize[0] - avctx->width;
              u += pic->linesize[1] - avctx->width / 2;
              v += pic->linesize[2] - avctx->width / 2;
          }
      }
  
      pkt->flags |= AV_PKT_FLAG_KEY;
      *got_packet = 1;
      return 0;
  }
  
  AVCodec ff_v210_encoder = {
      .name           = "v210",
      .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
      .type           = AVMEDIA_TYPE_VIDEO,
      .id             = AV_CODEC_ID_V210,
      .priv_data_size = sizeof(V210EncContext),
      .init           = encode_init,
      .encode2        = encode_frame,
      .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE },
  };
  