v410enc.c
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1 /*
2  * v410 encoder
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  if (avctx->width & 1) {
29  av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
30  return AVERROR_INVALIDDATA;
31  }
32 
34 
35  if (!avctx->coded_frame) {
36  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
37  return AVERROR(ENOMEM);
38  }
39 
40  return 0;
41 }
42 
43 static int v410_encode_frame(AVCodecContext *avctx, uint8_t *buf,
44  int buf_size, void *data)
45 {
46  AVFrame *pic = data;
47  uint8_t *dst = buf;
48  uint16_t *y, *u, *v;
49  uint32_t val;
50  int i, j;
51  int output_size = 0;
52 
53  if (buf_size < avctx->width * avctx->height * 4) {
54  av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
55  return AVERROR(ENOMEM);
56  }
57 
58  avctx->coded_frame->reference = 0;
59  avctx->coded_frame->key_frame = 1;
61 
62  y = (uint16_t *)pic->data[0];
63  u = (uint16_t *)pic->data[1];
64  v = (uint16_t *)pic->data[2];
65 
66  for (i = 0; i < avctx->height; i++) {
67  for (j = 0; j < avctx->width; j++) {
68  val = u[j] << 2;
69  val |= y[j] << 12;
70  val |= (uint32_t) v[j] << 22;
71  AV_WL32(dst, val);
72  dst += 4;
73  output_size += 4;
74  }
75  y += pic->linesize[0] >> 1;
76  u += pic->linesize[1] >> 1;
77  v += pic->linesize[2] >> 1;
78  }
79 
80  return output_size;
81 }
82 
84 {
85  av_freep(&avctx->coded_frame);
86 
87  return 0;
88 }
89 
91  .name = "v410",
92  .type = AVMEDIA_TYPE_VIDEO,
93  .id = CODEC_ID_V410,
94  .init = v410_encode_init,
95  .encode = v410_encode_frame,
96  .close = v410_encode_close,
97  .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV444P10, PIX_FMT_NONE },
98  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
99 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
Audio Video Frame.
Definition: avcodec.h:985
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2000
int width
Definition: rotozoom.c:164
static av_cold int v410_encode_init(AVCodecContext *avctx)
Definition: v410enc.c:26
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
#define AV_WL32(p, d)
Definition: intreadwrite.h:255
const char data[16]
Definition: mxf.c:60
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
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
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
AVCodec ff_v410_encoder
Definition: v410enc.c:90
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
PixelFormat
Pixel format.
Definition: pixfmt.h:62
#define PIX_FMT_YUV444P10
Definition: pixfmt.h:189
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1022
static av_cold int v410_encode_close(AVCodecContext *avctx)
Definition: v410enc.c:83
static int v410_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void *data)
Definition: v410enc.c:43
for(j=16;j >0;--j)