v210x.c
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1 /*
2  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; 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 
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 
34 
35  return 0;
36 }
37 
38 static 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_ask_for_sample(avctx, "Probably padded data\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;
67  pic->key_frame= 1;
68 
69  for(;;){
70  uint32_t v= av_be2ne32(*src++);
71  *udst++= (v>>16) & 0xFFC0;
72  *ydst++= (v>>6 ) & 0xFFC0;
73  *vdst++= (v<<4 ) & 0xFFC0;
74 
75  v= av_be2ne32(*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= av_be2ne32(*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= av_be2ne32(*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 
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 
136  .name = "v210x",
137  .type = AVMEDIA_TYPE_VIDEO,
138  .id = CODEC_ID_V210X,
139  .init = decode_init,
140  .close = decode_close,
141  .decode = decode_frame,
142  .capabilities = CODEC_CAP_DR1,
143  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
144 };