rawenc.c
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1 /*
2  * Raw Video Encoder
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
27 #include "avcodec.h"
28 #include "raw.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/intreadwrite.h"
31 
33 {
34  avctx->coded_frame = (AVFrame *)avctx->priv_data;
36  avctx->coded_frame->key_frame = 1;
38  if(!avctx->codec_tag)
40  return 0;
41 }
42 
43 static int raw_encode(AVCodecContext *avctx,
44  unsigned char *frame, int buf_size, void *data)
45 {
46  int ret = avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
47  avctx->height, frame, buf_size);
48 
49  if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
50  avctx->pix_fmt == PIX_FMT_YUYV422) {
51  int x;
52  for(x = 1; x < avctx->height*avctx->width*2; x += 2)
53  frame[x] ^= 0x80;
54  }
55  return ret;
56 }
57 
59  .name = "rawvideo",
60  .type = AVMEDIA_TYPE_VIDEO,
61  .id = CODEC_ID_RAWVIDEO,
62  .priv_data_size = sizeof(AVFrame),
64  .encode = raw_encode,
65  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
66 };
enum PixelFormat pix_fmt
Pixel format, see PIX_FMT_xxx.
Definition: avcodec.h:1426
Audio Video Frame.
Definition: avcodec.h:985
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2000
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:1135
four components are given, that's all.
Definition: avcodec.h:3367
AVCodec.
Definition: avcodec.h:3189
#define av_cold
Definition: attributes.h:71
const char data[16]
Definition: mxf.c:60
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1974
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:336
static av_cold int raw_init_encoder(AVCodecContext *avctx)
Definition: rawenc.c:32
#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
const char * name
Name of the codec implementation.
Definition: avcodec.h:3196
const AVPixFmtDescriptor av_pix_fmt_descriptors[PIX_FMT_NB]
The array of all the pixel format descriptors.
Definition: pixdesc.c:119
AVCodec ff_rawvideo_encoder
Definition: rawenc.c:58
enum AVPictureType pict_type
Picture type of the frame, see ?_TYPE below.
Definition: avcodec.h:1029
Raw Video Codec.
int width
picture width / height.
Definition: avcodec.h:1408
struct AVFrame AVFrame
Audio Video Frame.
external API header
main external API structure.
Definition: avcodec.h:1329
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1590
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:65
void * priv_data
Definition: avcodec.h:1531
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt)
Return a value representing the fourCC code associated to the pixel format pix_fmt, or 0 if no associated fourCC code can be found.
Definition: raw.c:150
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1022
int avpicture_layout(const AVPicture *src, enum PixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size)
Copy pixel data from an AVPicture into a buffer.
Definition: imgconvert.c:443
static int raw_encode(AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data)
Definition: rawenc.c:43