FFmpeg  4.0
v210x.c
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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 "internal.h"
23 #include "libavutil/bswap.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/mem.h"
26 
28 {
29  if (avctx->width & 1) {
30  av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
31  return AVERROR(EINVAL);
32  }
34  avctx->bits_per_raw_sample = 10;
35 
36  return 0;
37 }
38 
39 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
40  AVPacket *avpkt)
41 {
42  const uint32_t *src = (const uint32_t *)avpkt->data;
43  AVFrame *pic = data;
44  int width = avctx->width;
45  int y = 0;
46  uint16_t *ydst, *udst, *vdst, *yend;
47  int ret;
48 
49  if (avpkt->size < avctx->width * avctx->height * 8 / 3) {
50  av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
51  return AVERROR_INVALIDDATA;
52  }
53 
54  if (avpkt->size > avctx->width * avctx->height * 8 / 3) {
55  avpriv_request_sample(avctx, "(Probably) padded data");
56  }
57 
58  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
59  return ret;
60 
61  ydst = (uint16_t *)pic->data[0];
62  udst = (uint16_t *)pic->data[1];
63  vdst = (uint16_t *)pic->data[2];
64  yend = ydst + width;
65  pic->pict_type = AV_PICTURE_TYPE_I;
66  pic->key_frame = 1;
67 
68  for (;;) {
69  uint32_t v = av_be2ne32(*src++);
70  *udst++ = (v >> 16) & 0xFFC0;
71  *ydst++ = (v >> 6 ) & 0xFFC0;
72  *vdst++ = (v << 4 ) & 0xFFC0;
73 
74  v = av_be2ne32(*src++);
75  *ydst++ = (v >> 16) & 0xFFC0;
76 
77  if (ydst >= yend) {
78  ydst += pic->linesize[0] / 2 - width;
79  udst += pic->linesize[1] / 2 - width / 2;
80  vdst += pic->linesize[2] / 2 - width / 2;
81  yend = ydst + width;
82  if (++y >= avctx->height)
83  break;
84  }
85 
86  *udst++ = (v >> 6 ) & 0xFFC0;
87  *ydst++ = (v << 4 ) & 0xFFC0;
88 
89  v = av_be2ne32(*src++);
90  *vdst++ = (v >> 16) & 0xFFC0;
91  *ydst++ = (v >> 6 ) & 0xFFC0;
92 
93  if (ydst >= yend) {
94  ydst += pic->linesize[0] / 2 - width;
95  udst += pic->linesize[1] / 2 - width / 2;
96  vdst += pic->linesize[2] / 2 - width / 2;
97  yend = ydst + width;
98  if (++y >= avctx->height)
99  break;
100  }
101 
102  *udst++ = (v << 4 ) & 0xFFC0;
103 
104  v = av_be2ne32(*src++);
105  *ydst++ = (v >> 16) & 0xFFC0;
106  *vdst++ = (v >> 6 ) & 0xFFC0;
107  *ydst++ = (v << 4 ) & 0xFFC0;
108  if (ydst >= yend) {
109  ydst += pic->linesize[0] / 2 - width;
110  udst += pic->linesize[1] / 2 - width / 2;
111  vdst += pic->linesize[2] / 2 - width / 2;
112  yend = ydst + width;
113  if (++y >= avctx->height)
114  break;
115  }
116  }
117 
118  *got_frame = 1;
119 
120  return avpkt->size;
121 }
122 
124  .name = "v210x",
125  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
126  .type = AVMEDIA_TYPE_VIDEO,
127  .id = AV_CODEC_ID_V210X,
128  .init = decode_init,
129  .decode = decode_frame,
130  .capabilities = AV_CODEC_CAP_DR1,
131 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
Memory handling functions.
int size
Definition: avcodec.h:1431
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1727
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2741
#define src
Definition: vp8dsp.c:254
#define av_be2ne32(x)
Definition: bswap.h:93
AVCodec.
Definition: avcodec.h:3408
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define av_cold
Definition: attributes.h:82
const char data[16]
Definition: mxf.c:90
uint8_t * data
Definition: avcodec.h:1430
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
uint16_t width
Definition: gdv.c:47
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
common internal API header
int width
picture width / height.
Definition: avcodec.h:1690
static av_cold int decode_init(AVCodecContext *avctx)
Definition: v210x.c:27
if(ret< 0)
Definition: vf_mcdeint.c:279
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1518
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1891
byte swapping routines
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v210x.c:39
AVCodec ff_v210x_decoder
Definition: v210x.c:123
common internal api header.
This structure stores compressed data.
Definition: avcodec.h:1407
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:380
for(j=16;j >0;--j)