1/*
2 * Pinnacle TARGA CineWave YUV16 decoder
3 * Copyright (c) 2012 Carl Eugen Hoyos
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "avcodec.h"
23#include "codec_internal.h"
24#include "internal.h"
25
26static av_cold int y216_decode_init(AVCodecContext *avctx)
27{
28    avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
29    avctx->bits_per_raw_sample = 14;
30
31    return 0;
32}
33
34static int y216_decode_frame(AVCodecContext *avctx, AVFrame *pic,
35                             int *got_frame, AVPacket *avpkt)
36{
37    const uint16_t *src = (uint16_t *)avpkt->data;
38    uint16_t *y, *u, *v;
39    int aligned_width = FFALIGN(avctx->width, 4);
40    int i, j, ret;
41
42    if (avpkt->size < 4 * avctx->height * aligned_width) {
43        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
44        return AVERROR(EINVAL);
45    }
46
47    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
48        return ret;
49
50    pic->key_frame = 1;
51    pic->pict_type = AV_PICTURE_TYPE_I;
52
53    y = (uint16_t *)pic->data[0];
54    u = (uint16_t *)pic->data[1];
55    v = (uint16_t *)pic->data[2];
56
57    for (i = 0; i < avctx->height; i++) {
58        for (j = 0; j < avctx->width >> 1; j++) {
59            u[    j    ] = src[4 * j    ] << 2 | src[4 * j    ] >> 14;
60            y[2 * j    ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;
61            v[    j    ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;
62            y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;
63        }
64
65        y += pic->linesize[0] >> 1;
66        u += pic->linesize[1] >> 1;
67        v += pic->linesize[2] >> 1;
68        src += aligned_width << 1;
69    }
70
71    *got_frame = 1;
72
73    return avpkt->size;
74}
75
76const FFCodec ff_targa_y216_decoder = {
77    .p.name       = "targa_y216",
78    .p.long_name  = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"),
79    .p.type       = AVMEDIA_TYPE_VIDEO,
80    .p.id         = AV_CODEC_ID_TARGA_Y216,
81    .init         = y216_decode_init,
82    FF_CODEC_DECODE_CB(y216_decode_frame),
83    .p.capabilities = AV_CODEC_CAP_DR1,
84    .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
85};
86