FFmpeg
yuv4enc.c
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1 /*
2  * libquicktime yuv4 encoder
3  *
4  * Copyright (c) 2011 Carl Eugen Hoyos
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "internal.h"
25 
27  const AVFrame *pic, int *got_packet)
28 {
29  uint8_t *dst;
30  uint8_t *y, *u, *v;
31  int i, j, ret;
32 
33  if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1), 0)) < 0)
34  return ret;
35  dst = pkt->data;
36 
37  y = pic->data[0];
38  u = pic->data[1];
39  v = pic->data[2];
40 
41  for (i = 0; i < avctx->height + 1 >> 1; i++) {
42  for (j = 0; j < avctx->width + 1 >> 1; j++) {
43  *dst++ = u[j] ^ 0x80;
44  *dst++ = v[j] ^ 0x80;
45  *dst++ = y[ 2 * j ];
46  *dst++ = y[ 2 * j + 1];
47  *dst++ = y[pic->linesize[0] + 2 * j ];
48  *dst++ = y[pic->linesize[0] + 2 * j + 1];
49  }
50  y += 2 * pic->linesize[0];
51  u += pic->linesize[1];
52  v += pic->linesize[2];
53  }
54 
55  pkt->flags |= AV_PKT_FLAG_KEY;
56  *got_packet = 1;
57  return 0;
58 }
59 
61  .name = "yuv4",
62  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
63  .type = AVMEDIA_TYPE_VIDEO,
64  .id = AV_CODEC_ID_YUV4,
65  .encode2 = yuv4_encode_frame,
66  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
67 };
AVCodec ff_yuv4_encoder
Definition: yuv4enc.c:60
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
static AVPacket pkt
AVCodec.
Definition: codec.h:190
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: encode.c:33
uint8_t
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
uint8_t * data
Definition: packet.h:363
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:401
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: yuv4enc.c:26
const char * name
Name of the codec implementation.
Definition: codec.h:197
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:369
int width
picture width / height.
Definition: avcodec.h:699
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
main external API structure.
Definition: avcodec.h:526
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
common internal api header.
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: packet.h:340
int i
Definition: input.c:407