FFmpeg
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 "codec_internal.h"
23 #include "decode.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/internal.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, AVFrame *pic,
40  int *got_frame, AVPacket *avpkt)
41 {
42  const uint32_t *src = (const uint32_t *)avpkt->data;
43  int width = avctx->width;
44  int y = 0;
45  uint16_t *ydst, *udst, *vdst, *yend;
46  int ret;
47 
48  if (avpkt->size < avctx->width * avctx->height * 8 / 3) {
49  av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
50  return AVERROR_INVALIDDATA;
51  }
52 
53  if (avpkt->size > avctx->width * avctx->height * 8 / 3) {
54  avpriv_request_sample(avctx, "(Probably) padded data");
55  }
56 
57  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
58  return ret;
59 
60  ydst = (uint16_t *)pic->data[0];
61  udst = (uint16_t *)pic->data[1];
62  vdst = (uint16_t *)pic->data[2];
63  yend = ydst + width;
64 
65  for (;;) {
66  uint32_t v = av_be2ne32(*src++);
67  *udst++ = (v >> 16) & 0xFFC0;
68  *ydst++ = (v >> 6 ) & 0xFFC0;
69  *vdst++ = (v << 4 ) & 0xFFC0;
70 
71  v = av_be2ne32(*src++);
72  *ydst++ = (v >> 16) & 0xFFC0;
73 
74  if (ydst >= yend) {
75  ydst += pic->linesize[0] / 2 - width;
76  udst += pic->linesize[1] / 2 - width / 2;
77  vdst += pic->linesize[2] / 2 - width / 2;
78  yend = ydst + width;
79  if (++y >= avctx->height)
80  break;
81  }
82 
83  *udst++ = (v >> 6 ) & 0xFFC0;
84  *ydst++ = (v << 4 ) & 0xFFC0;
85 
86  v = av_be2ne32(*src++);
87  *vdst++ = (v >> 16) & 0xFFC0;
88  *ydst++ = (v >> 6 ) & 0xFFC0;
89 
90  if (ydst >= yend) {
91  ydst += pic->linesize[0] / 2 - width;
92  udst += pic->linesize[1] / 2 - width / 2;
93  vdst += pic->linesize[2] / 2 - width / 2;
94  yend = ydst + width;
95  if (++y >= avctx->height)
96  break;
97  }
98 
99  *udst++ = (v << 4 ) & 0xFFC0;
100 
101  v = av_be2ne32(*src++);
102  *ydst++ = (v >> 16) & 0xFFC0;
103  *vdst++ = (v >> 6 ) & 0xFFC0;
104  *ydst++ = (v << 4 ) & 0xFFC0;
105  if (ydst >= yend) {
106  ydst += pic->linesize[0] / 2 - width;
107  udst += pic->linesize[1] / 2 - width / 2;
108  vdst += pic->linesize[2] / 2 - width / 2;
109  yend = ydst + width;
110  if (++y >= avctx->height)
111  break;
112  }
113  }
114 
115  *got_frame = 1;
116 
117  return avpkt->size;
118 }
119 
121  .p.name = "v210x",
122  CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
123  .p.type = AVMEDIA_TYPE_VIDEO,
124  .p.id = AV_CODEC_ID_V210X,
125  .init = decode_init,
127  .p.capabilities = AV_CODEC_CAP_DR1,
128 };
ff_v210x_decoder
const FFCodec ff_v210x_decoder
Definition: v210x.c:120
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: v210x.c:27
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
AVPacket::data
uint8_t * data
Definition: packet.h:524
FFCodec
Definition: codec_internal.h:126
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:395
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:130
decode_frame
static int decode_frame(AVCodecContext *avctx, AVFrame *pic, int *got_frame, AVPacket *avpkt)
Definition: v210x.c:39
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:490
width
#define width
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:286
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1575
decode.h
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:271
if
if(ret)
Definition: filter_design.txt:179
av_be2ne32
#define av_be2ne32(x)
Definition: bswap.h:95
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1575
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:525
codec_internal.h
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
AV_CODEC_ID_V210X
@ AV_CODEC_ID_V210X
Definition: codec_id.h:177
internal.h
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::height
int height
Definition: avcodec.h:618
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:657
avcodec.h
ret
ret
Definition: filter_design.txt:187
bswap.h
AVCodecContext
main external API structure.
Definition: avcodec.h:445
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVPacket
This structure stores compressed data.
Definition: packet.h:501
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:618
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:419
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61