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  1. /*
  2.  * R210 decoder
  3.  *
  4.  * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
  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. #include "avcodec.h"
  24. #include "internal.h"
  25. #include "libavutil/bswap.h"
  26. #include "libavutil/common.h"
  27.  
  28. static av_cold int decode_init(AVCodecContext *avctx)
  29. {
  30.     avctx->pix_fmt             = AV_PIX_FMT_RGB48;
  31.     avctx->bits_per_raw_sample = 10;
  32.  
  33.     return 0;
  34. }
  35.  
  36. static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
  37.                         AVPacket *avpkt)
  38. {
  39.     int h, w, ret;
  40.     AVFrame *pic = data;
  41.     const uint32_t *src = (const uint32_t *)avpkt->data;
  42.     int aligned_width = FFALIGN(avctx->width,
  43.                                 avctx->codec_id == AV_CODEC_ID_R10K ? 1 : 64);
  44.     uint8_t *dst_line;
  45.  
  46.     if (avpkt->size < 4 * aligned_width * avctx->height) {
  47.         av_log(avctx, AV_LOG_ERROR, "packet too small\n");
  48.         return AVERROR_INVALIDDATA;
  49.     }
  50.  
  51.     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
  52.         return ret;
  53.  
  54.     pic->pict_type = AV_PICTURE_TYPE_I;
  55.     pic->key_frame = 1;
  56.     dst_line = pic->data[0];
  57.  
  58.     for (h = 0; h < avctx->height; h++) {
  59.         uint16_t *dst = (uint16_t *)dst_line;
  60.         for (w = 0; w < avctx->width; w++) {
  61.             uint32_t pixel;
  62.             uint16_t r, g, b;
  63.             if (avctx->codec_id==AV_CODEC_ID_AVRP) {
  64.                 pixel = av_le2ne32(*src++);
  65.             } else {
  66.                 pixel = av_be2ne32(*src++);
  67.             }
  68.             if (avctx->codec_id==AV_CODEC_ID_R210) {
  69.                 b =  pixel <<  6;
  70.                 g = (pixel >>  4) & 0xffc0;
  71.                 r = (pixel >> 14) & 0xffc0;
  72.             } else {
  73.                 b =  pixel <<  4;
  74.                 g = (pixel >>  6) & 0xffc0;
  75.                 r = (pixel >> 16) & 0xffc0;
  76.             }
  77.             *dst++ = r | (r >> 10);
  78.             *dst++ = g | (g >> 10);
  79.             *dst++ = b | (b >> 10);
  80.         }
  81.         src += aligned_width - avctx->width;
  82.         dst_line += pic->linesize[0];
  83.     }
  84.  
  85.     *got_frame      = 1;
  86.  
  87.     return avpkt->size;
  88. }
  89.  
  90. #if CONFIG_R210_DECODER
  91. AVCodec ff_r210_decoder = {
  92.     .name           = "r210",
  93.     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
  94.     .type           = AVMEDIA_TYPE_VIDEO,
  95.     .id             = AV_CODEC_ID_R210,
  96.     .init           = decode_init,
  97.     .decode         = decode_frame,
  98.     .capabilities   = CODEC_CAP_DR1,
  99. };
  100. #endif
  101. #if CONFIG_R10K_DECODER
  102. AVCodec ff_r10k_decoder = {
  103.     .name           = "r10k",
  104.     .long_name      = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
  105.     .type           = AVMEDIA_TYPE_VIDEO,
  106.     .id             = AV_CODEC_ID_R10K,
  107.     .init           = decode_init,
  108.     .decode         = decode_frame,
  109.     .capabilities   = CODEC_CAP_DR1,
  110. };
  111. #endif
  112. #if CONFIG_AVRP_DECODER
  113. AVCodec ff_avrp_decoder = {
  114.     .name           = "avrp",
  115.     .long_name      = NULL_IF_CONFIG_SMALL("Avid 1:1 10-bit RGB Packer"),
  116.     .type           = AVMEDIA_TYPE_VIDEO,
  117.     .id             = AV_CODEC_ID_AVRP,
  118.     .init           = decode_init,
  119.     .decode         = decode_frame,
  120.     .capabilities   = CODEC_CAP_DR1,
  121. };
  122. #endif
  123.