v410dec.c
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1 /*
2  * v410 decoder
3  *
4  * Copyright (c) 2011 Derek Buitenhuis
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 "libavutil/intreadwrite.h"
24 #include "avcodec.h"
25 
27 {
28  avctx->pix_fmt = PIX_FMT_YUV444P10;
29  avctx->bits_per_raw_sample = 10;
30 
31  if (avctx->width & 1) {
32  av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
33  return AVERROR_INVALIDDATA;
34  }
35 
37 
38  if (!avctx->coded_frame) {
39  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
40  return AVERROR(ENOMEM);
41  }
42 
43  return 0;
44 }
45 
46 static int v410_decode_frame(AVCodecContext *avctx, void *data,
47  int *data_size, AVPacket *avpkt)
48 {
49  AVFrame *pic = avctx->coded_frame;
50  uint8_t *src = avpkt->data;
51  uint16_t *y, *u, *v;
52  uint32_t val;
53  int i, j;
54 
55  if (pic->data[0])
56  avctx->release_buffer(avctx, pic);
57 
58  if (avpkt->size < 4 * avctx->height * avctx->width) {
59  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
60  return AVERROR(EINVAL);
61  }
62 
63  pic->reference = 0;
64 
65  if (avctx->get_buffer(avctx, pic) < 0) {
66  av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
67  return AVERROR(ENOMEM);
68  }
69 
70  pic->key_frame = 1;
72 
73  y = (uint16_t *)pic->data[0];
74  u = (uint16_t *)pic->data[1];
75  v = (uint16_t *)pic->data[2];
76 
77  for (i = 0; i < avctx->height; i++) {
78  for (j = 0; j < avctx->width; j++) {
79  val = AV_RL32(src);
80 
81  u[j] = (val >> 2) & 0x3FF;
82  y[j] = (val >> 12) & 0x3FF;
83  v[j] = (val >> 22);
84 
85  src += 4;
86  }
87 
88  y += pic->linesize[0] >> 1;
89  u += pic->linesize[1] >> 1;
90  v += pic->linesize[2] >> 1;
91  }
92 
93  *data_size = sizeof(AVFrame);
94  *(AVFrame *)data = *pic;
95 
96  return avpkt->size;
97 }
98 
100 {
101  if (avctx->coded_frame->data[0])
102  avctx->release_buffer(avctx, avctx->coded_frame);
103 
104  av_freep(&avctx->coded_frame);
105 
106  return 0;
107 }
108 
110  .name = "v410",
111  .type = AVMEDIA_TYPE_VIDEO,
112  .id = CODEC_ID_V410,
113  .init = v410_decode_init,
114  .decode = v410_decode_frame,
115  .close = v410_decode_close,
116  .capabilities = CODEC_CAP_DR1,
117  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
118 };
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
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
Audio Video Frame.
Definition: avcodec.h:985
static int v410_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
Definition: v410dec.c:46
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
static av_cold int v410_decode_init(AVCodecContext *avctx)
Definition: v410dec.c:26
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2863
AVCodec.
Definition: avcodec.h:3189
#define v(n)
Definition: regs.h:34
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
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 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:191
AV_RL32
Definition: bytestream.h:89
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.
AVCodec ff_v410_decoder
Definition: v410dec.c:109
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 AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:111
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
#define PIX_FMT_YUV444P10
Definition: pixfmt.h:189
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1022
static av_cold int v410_decode_close(AVCodecContext *avctx)
Definition: v410dec.c:99
for(j=16;j >0;--j)