r210dec.c
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1 /*
2  * R210 decoder
3  *
4  * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "avcodec.h"
24 #include "libavutil/bswap.h"
25 
27 {
28  avctx->pix_fmt = PIX_FMT_RGB48;
29  avctx->bits_per_raw_sample = 10;
30 
32 
33  return 0;
34 }
35 
36 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
37  AVPacket *avpkt)
38 {
39  int h, w;
40  AVFrame *pic = avctx->coded_frame;
41  const uint32_t *src = (const uint32_t *)avpkt->data;
42  int aligned_width = FFALIGN(avctx->width, 64);
43  uint8_t *dst_line;
44 
45  if (pic->data[0])
46  avctx->release_buffer(avctx, pic);
47 
48  if (avpkt->size < 4 * aligned_width * avctx->height) {
49  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
50  return -1;
51  }
52 
53  pic->reference = 0;
54  if (avctx->get_buffer(avctx, pic) < 0)
55  return -1;
56 
58  pic->key_frame = 1;
59  dst_line = pic->data[0];
60 
61  for (h = 0; h < avctx->height; h++) {
62  uint16_t *dst = (uint16_t *)dst_line;
63  for (w = 0; w < avctx->width; w++) {
64  uint32_t pixel = av_be2ne32(*src++);
65  uint16_t r, g, b;
66  if (avctx->codec_id==CODEC_ID_R210) {
67  b = pixel << 6;
68  g = (pixel >> 4) & 0xffc0;
69  r = (pixel >> 14) & 0xffc0;
70  } else {
71  b = pixel << 4;
72  g = (pixel >> 6) & 0xffc0;
73  r = (pixel >> 16) & 0xffc0;
74  }
75  *dst++ = r | (r >> 10);
76  *dst++ = g | (g >> 10);
77  *dst++ = b | (b >> 10);
78  }
79  src += aligned_width - avctx->width;
80  dst_line += pic->linesize[0];
81  }
82 
83  *data_size = sizeof(AVFrame);
84  *(AVFrame*)data = *avctx->coded_frame;
85 
86  return avpkt->size;
87 }
88 
90 {
91  AVFrame *pic = avctx->coded_frame;
92  if (pic->data[0])
93  avctx->release_buffer(avctx, pic);
94  av_freep(&avctx->coded_frame);
95 
96  return 0;
97 }
98 
99 #if CONFIG_R210_DECODER
100 AVCodec ff_r210_decoder = {
101  .name = "r210",
102  .type = AVMEDIA_TYPE_VIDEO,
103  .id = CODEC_ID_R210,
104  .init = decode_init,
105  .close = decode_close,
106  .decode = decode_frame,
107  .capabilities = CODEC_CAP_DR1,
108  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
109 };
110 #endif
111 #if CONFIG_R10K_DECODER
112 AVCodec ff_r10k_decoder = {
113  .name = "r10k",
114  .type = AVMEDIA_TYPE_VIDEO,
115  .id = CODEC_ID_R10K,
116  .init = decode_init,
117  .close = decode_close,
118  .decode = decode_frame,
119  .capabilities = CODEC_CAP_DR1,
120  .long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
121 };
122 #endif
int(* get_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called at the beginning of each frame to get a buffer for it.
Definition: avcodec.h:1726
enum PixelFormat pix_fmt
Pixel format, see PIX_FMT_xxx.
Definition: avcodec.h:1426
Audio Video Frame.
Definition: avcodec.h:985
void(* release_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called to release buffers which were allocated with get_buffer.
Definition: avcodec.h:1737
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2000
int size
Definition: avcodec.h:909
#define b
Definition: swscale.c:1335
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2863
#define av_be2ne32(x)
Definition: bswap.h:93
AVCodec.
Definition: avcodec.h:3189
#define FFALIGN(x, a)
Definition: common.h:60
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:147
#define av_cold
Definition: attributes.h:71
static av_cold int decode_close(AVCodecContext *avctx)
Definition: r210dec.c:89
const char data[16]
Definition: mxf.c:60
uint8_t * data
Definition: avcodec.h:908
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:719
int reference
is this picture used as reference The values for this are the same as the MpegEncContext.picture_structure variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
Definition: avcodec.h:1074
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:191
g
Definition: yuv2rgb.c:481
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:140
const char * name
Name of the codec implementation.
Definition: avcodec.h:3196
AVFrame * avcodec_alloc_frame(void)
Allocate an AVFrame and set its fields to default values.
Definition: utils.c:618
enum AVPictureType pict_type
Picture type of the frame, see ?_TYPE below.
Definition: avcodec.h:1029
int width
picture width / height.
Definition: avcodec.h:1408
struct AVFrame AVFrame
Audio Video Frame.
#define pixel
external API header
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
main external API structure.
Definition: avcodec.h:1329
#define PIX_FMT_RGB48
Definition: pixfmt.h:175
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:111
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
Definition: r210dec.c:36
byte swapping routines
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
#define r(n)
Definition: regs.h:32
static av_cold int decode_init(AVCodecContext *avctx)
Definition: r210dec.c:26
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1022
enum CodecID codec_id
Definition: avcodec.h:1575