4 * Copyright (c) 2011 Konstantin Shishkov
6 * This file is part of Libav.
8 * Libav 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.
13 * Libav 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libavutil/common.h"
26 #include "libavutil/intreadwrite.h"
28 static av_cold int decode_init(AVCodecContext *avctx)
30 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
35 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
40 const uint8_t *src = avpkt->data;
41 uint8_t *Y1, *Y2, *U, *V;
44 if (avpkt->size < avctx->width * avctx->height * 3 / 2 + 16) {
45 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
46 return AVERROR_INVALIDDATA;
49 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
52 pic->pict_type = AV_PICTURE_TYPE_I;
55 if (AV_RL32(src) != 0x01000002) {
56 avpriv_request_sample(avctx, "Frame header %X", AV_RL32(src));
57 return AVERROR_PATCHWELCOME;
62 Y2 = pic->data[0] + pic->linesize[0];
65 for (h = 0; h < avctx->height; h += 2) {
66 for (w = 0; w < avctx->width; w += 2) {
67 AV_COPY16(Y1 + w, src);
68 AV_COPY16(Y2 + w, src + 2);
69 U[w >> 1] = src[4] + 0x80;
70 V[w >> 1] = src[5] + 0x80;
73 Y1 += pic->linesize[0] << 1;
74 Y2 += pic->linesize[0] << 1;
75 U += pic->linesize[1];
76 V += pic->linesize[2];
84 AVCodec ff_dxtory_decoder = {
86 .long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
87 .type = AVMEDIA_TYPE_VIDEO,
88 .id = AV_CODEC_ID_DXTORY,
90 .decode = decode_frame,
91 .capabilities = CODEC_CAP_DR1,