libavcodec/r210dec.c

   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 "libavutil/bswap.h"
  25
  26 static av_cold int decode_init(AVCodecContext *avctx)
  27 {
  28     avctx->pix_fmt             = PIX_FMT_RGB48;
  29     avctx->bits_per_raw_sample = 10;
  30
  31     avctx->coded_frame         = avcodec_alloc_frame();
  32
  33     return 0;
  34 }
  35
  36 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
  37                         AVPacket *avpkt)
  38 {
  39     int h, w;
  40     AVFrame *pic = avctx->coded_frame;
  41     const uint32_t *src = (const uint32_t *)avpkt->data;
  42     int aligned_width = FFALIGN(avctx->width, 64);
  43     uint8_t *dst_line;
  44
  45     if (pic->data[0])
  46         avctx->release_buffer(avctx, pic);
  47
  48     if (avpkt->size < 4 * aligned_width * avctx->height) {
  49         av_log(avctx, AV_LOG_ERROR, "packet too small\n");
  50         return -1;
  51     }
  52
  53     pic->reference = 0;
  54     if (avctx->get_buffer(avctx, pic) < 0)
  55         return -1;
  56
  57     pic->pict_type = FF_I_TYPE;
  58     pic->key_frame = 1;
  59     dst_line = pic->data[0];
  60
  61     for (h = 0; h < avctx->height; h++) {
  62         uint16_t *dst = (uint16_t *)dst_line;
  63         for (w = 0; w < avctx->width; w++) {
  64             uint32_t pixel = av_be2ne32(*src++);
  65             uint16_t r, g, b;
  66             if (avctx->codec_id==CODEC_ID_R210) {
  67                 b =  pixel <<  6;
  68                 g = (pixel >>  4) & 0xffc0;
  69                 r = (pixel >> 14) & 0xffc0;
  70             } else {
  71                 b =  pixel <<  4;
  72                 g = (pixel >>  6) & 0xffc0;
  73                 r = (pixel >> 16) & 0xffc0;
  74             }
  75             *dst++ = r | (r >> 10);
  76             *dst++ = g | (g >> 10);
  77             *dst++ = b | (b >> 10);
  78         }
  79         src += aligned_width - avctx->width;
  80         dst_line += pic->linesize[0];
  81     }
  82
  83     *data_size = sizeof(AVFrame);
  84     *(AVFrame*)data = *avctx->coded_frame;
  85
  86     return avpkt->size;
  87 }
  88
  89 static av_cold int decode_close(AVCodecContext *avctx)
  90 {
  91     AVFrame *pic = avctx->coded_frame;
  92     if (pic->data[0])
  93         avctx->release_buffer(avctx, pic);
  94     av_freep(&avctx->coded_frame);
  95
  96     return 0;
  97 }
  98
  99 #if CONFIG_R210_DECODER
 100 AVCodec ff_r210_decoder = {
 101     "r210",
 102     AVMEDIA_TYPE_VIDEO,
 103     CODEC_ID_R210,
 104     0,
 105     decode_init,
 106     NULL,
 107     decode_close,
 108     decode_frame,
 109     CODEC_CAP_DR1,
 110     .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
 111 };
 112 #endif
 113 #if CONFIG_R10K_DECODER
 114 AVCodec ff_r10k_decoder = {
 115     "r10k",
 116     AVMEDIA_TYPE_VIDEO,
 117     CODEC_ID_R10K,
 118     0,
 119     decode_init,
 120     NULL,
 121     decode_close,
 122     decode_frame,
 123     CODEC_CAP_DR1,
 124     .long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
 125 };
 126 #endif