FFmpeg
yuv4enc.c
Go to the documentation of this file.
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 "encode.h"
25 #include "internal.h"
26 
28  const AVFrame *pic, int *got_packet)
29 {
30  uint8_t *dst;
31  uint8_t *y, *u, *v;
32  int i, j, ret;
33 
34  ret = ff_get_encode_buffer(avctx, pkt, 6 * (avctx->width + 1 >> 1)
35  * (avctx->height + 1 >> 1), 0);
36  if (ret < 0)
37  return ret;
38  dst = pkt->data;
39 
40  y = pic->data[0];
41  u = pic->data[1];
42  v = pic->data[2];
43 
44  for (i = 0; i < avctx->height + 1 >> 1; i++) {
45  for (j = 0; j < avctx->width + 1 >> 1; j++) {
46  *dst++ = u[j] ^ 0x80;
47  *dst++ = v[j] ^ 0x80;
48  *dst++ = y[ 2 * j ];
49  *dst++ = y[ 2 * j + 1];
50  *dst++ = y[pic->linesize[0] + 2 * j ];
51  *dst++ = y[pic->linesize[0] + 2 * j + 1];
52  }
53  y += 2 * pic->linesize[0];
54  u += pic->linesize[1];
55  v += pic->linesize[2];
56  }
57 
59  *got_packet = 1;
60  return 0;
61 }
62 
64  .name = "yuv4",
65  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
66  .type = AVMEDIA_TYPE_VIDEO,
67  .id = AV_CODEC_ID_YUV4,
68  .capabilities = AV_CODEC_CAP_DR1,
69  .encode2 = yuv4_encode_frame,
70  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
71 };
AVCodec
AVCodec.
Definition: codec.h:202
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
encode.h
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:425
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AV_CODEC_ID_YUV4
@ AV_CODEC_ID_YUV4
Definition: codec_id.h:258
pkt
AVPacket * pkt
Definition: movenc.c:59
yuv4_encode_frame
static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: yuv4enc.c:27
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
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
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
i
int i
Definition: input.c:406
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
AVCodecContext::height
int height
Definition: avcodec.h:556
avcodec.h
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:383
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:78
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:556
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
ff_yuv4_encoder
const AVCodec ff_yuv4_encoder
Definition: yuv4enc.c:63