1/*
2 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "avcodec.h"
22#include "libavutil/bswap.h"
23
24static av_cold int decode_init(AVCodecContext *avctx)
25{
26    if(avctx->width & 1){
27        av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
28        return -1;
29    }
30    avctx->pix_fmt = PIX_FMT_YUV422P16;
31    avctx->bits_per_raw_sample= 10;
32
33    avctx->coded_frame= avcodec_alloc_frame();
34
35    return 0;
36}
37
38static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
39{
40    int y=0;
41    int width= avctx->width;
42    AVFrame *pic= avctx->coded_frame;
43    const uint32_t *src= (const uint32_t *)avpkt->data;
44    uint16_t *ydst, *udst, *vdst, *yend;
45
46    if(pic->data[0])
47        avctx->release_buffer(avctx, pic);
48
49    if(avpkt->size < avctx->width * avctx->height * 8 / 3){
50        av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
51        return -1;
52    }
53
54    if(avpkt->size > avctx->width * avctx->height * 8 / 3){
55        av_log(avctx, AV_LOG_ERROR, "Probably padded data, need sample!\n");
56    }
57
58    pic->reference= 0;
59    if(avctx->get_buffer(avctx, pic) < 0)
60        return -1;
61
62    ydst= (uint16_t *)pic->data[0];
63    udst= (uint16_t *)pic->data[1];
64    vdst= (uint16_t *)pic->data[2];
65    yend= ydst + width;
66    pic->pict_type= FF_I_TYPE;
67    pic->key_frame= 1;
68
69    for(;;){
70        uint32_t v= be2me_32(*src++);
71        *udst++= (v>>16) & 0xFFC0;
72        *ydst++= (v>>6 ) & 0xFFC0;
73        *vdst++= (v<<4 ) & 0xFFC0;
74
75        v= be2me_32(*src++);
76        *ydst++= (v>>16) & 0xFFC0;
77
78        if(ydst >= yend){
79            ydst+= pic->linesize[0]/2 - width;
80            udst+= pic->linesize[1]/2 - width/2;
81            vdst+= pic->linesize[2]/2 - width/2;
82            yend= ydst + width;
83            if(++y >= avctx->height)
84                break;
85        }
86
87        *udst++= (v>>6 ) & 0xFFC0;
88        *ydst++= (v<<4 ) & 0xFFC0;
89
90        v= be2me_32(*src++);
91        *vdst++= (v>>16) & 0xFFC0;
92        *ydst++= (v>>6 ) & 0xFFC0;
93
94        if(ydst >= yend){
95            ydst+= pic->linesize[0]/2 - width;
96            udst+= pic->linesize[1]/2 - width/2;
97            vdst+= pic->linesize[2]/2 - width/2;
98            yend= ydst + width;
99            if(++y >= avctx->height)
100                break;
101        }
102
103        *udst++= (v<<4 ) & 0xFFC0;
104
105        v= be2me_32(*src++);
106        *ydst++= (v>>16) & 0xFFC0;
107        *vdst++= (v>>6 ) & 0xFFC0;
108        *ydst++= (v<<4 ) & 0xFFC0;
109        if(ydst >= yend){
110            ydst+= pic->linesize[0]/2 - width;
111            udst+= pic->linesize[1]/2 - width/2;
112            vdst+= pic->linesize[2]/2 - width/2;
113            yend= ydst + width;
114            if(++y >= avctx->height)
115                break;
116        }
117    }
118
119    *data_size=sizeof(AVFrame);
120    *(AVFrame*)data= *avctx->coded_frame;
121
122    return avpkt->size;
123}
124
125static av_cold int decode_close(AVCodecContext *avctx)
126{
127    AVFrame *pic = avctx->coded_frame;
128    if (pic->data[0])
129        avctx->release_buffer(avctx, pic);
130    av_freep(&avctx->coded_frame);
131
132    return 0;
133}
134
135AVCodec v210x_decoder = {
136    "v210x",
137    AVMEDIA_TYPE_VIDEO,
138    CODEC_ID_V210X,
139    0,
140    decode_init,
141    NULL,
142    decode_close,
143    decode_frame,
144    CODEC_CAP_DR1,
145    .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
146};
147