4 * Copyright (C) 2012 Carl Eugen Hoyos
6 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/intreadwrite.h"
27 static av_cold int zero12v_decode_init(AVCodecContext *avctx)
29 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
30 avctx->bits_per_raw_sample = 10;
32 if (avctx->codec_tag == MKTAG('a', '1', '2', 'v'))
33 avpriv_request_sample(avctx, "transparency");
38 static int zero12v_decode_frame(AVCodecContext *avctx, void *data,
39 int *got_frame, AVPacket *avpkt)
42 const int width = avctx->width;
45 const uint8_t *line_end, *src = avpkt->data;
46 int stride = avctx->width * 8 / 3;
49 av_log(avctx, AV_LOG_ERROR, "Width 1 not supported.\n");
50 return AVERROR_INVALIDDATA;
53 if ( avctx->codec_tag == MKTAG('0', '1', '2', 'v')
54 && avpkt->size % avctx->height == 0
55 && avpkt->size / avctx->height * 3 >= width * 8)
56 stride = avpkt->size / avctx->height;
58 if (avpkt->size < avctx->height * stride) {
59 av_log(avctx, AV_LOG_ERROR, "Packet too small: %d instead of %d\n",
60 avpkt->size, avctx->height * stride);
61 return AVERROR_INVALIDDATA;
64 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
67 pic->pict_type = AV_PICTURE_TYPE_I;
70 y = (uint16_t *)pic->data[0];
71 u = (uint16_t *)pic->data[1];
72 v = (uint16_t *)pic->data[2];
73 line_end = avpkt->data + stride;
75 while (line++ < avctx->height) {
77 uint32_t t = AV_RL32(src);
79 *u++ = t << 6 & 0xFFC0;
80 *y++ = t >> 4 & 0xFFC0;
81 *v++ = t >> 14 & 0xFFC0;
83 if (src >= line_end - 1) {
87 y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
88 u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
89 v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
95 *y++ = t << 6 & 0xFFC0;
96 *u++ = t >> 4 & 0xFFC0;
97 *y++ = t >> 14 & 0xFFC0;
98 if (src >= line_end - 2) {
104 y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
105 u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
106 v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
112 *v++ = t << 6 & 0xFFC0;
113 *y++ = t >> 4 & 0xFFC0;
114 *u++ = t >> 14 & 0xFFC0;
116 if (src >= line_end - 1) {
120 y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
121 u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
122 v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
128 *y++ = t << 6 & 0xFFC0;
129 *v++ = t >> 4 & 0xFFC0;
130 *y++ = t >> 14 & 0xFFC0;
132 if (src >= line_end - 2) {
138 y = (uint16_t *)(pic->data[0] + line * pic->linesize[0]);
139 u = (uint16_t *)(pic->data[1] + line * pic->linesize[1]);
140 v = (uint16_t *)(pic->data[2] + line * pic->linesize[2]);
151 AVCodec ff_zero12v_decoder = {
153 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
154 .type = AVMEDIA_TYPE_VIDEO,
155 .id = AV_CODEC_ID_012V,
156 .init = zero12v_decode_init,
157 .decode = zero12v_decode_frame,
158 .capabilities = CODEC_CAP_DR1,