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rawenc.c
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1 /*
2  * Raw Video Encoder
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Raw Video Encoder
25  */
26 
27 #include "avcodec.h"
28 #include "raw.h"
29 #include "internal.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 
36 {
37  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
38 
39 #if FF_API_CODED_FRAME
43 #endif
45  if(!avctx->codec_tag)
47  return 0;
48 }
49 
50 static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
51  const AVFrame *frame, int *got_packet)
52 {
53  int ret = av_image_get_buffer_size(frame->format,
54  frame->width, frame->height, 1);
55 
56  if (ret < 0)
57  return ret;
58 
59  if ((ret = ff_alloc_packet2(avctx, pkt, ret, ret)) < 0)
60  return ret;
61  if ((ret = av_image_copy_to_buffer(pkt->data, pkt->size,
62  (const uint8_t **)frame->data, frame->linesize,
63  frame->format,
64  frame->width, frame->height, 1)) < 0)
65  return ret;
66 
67  if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
68  frame->format == AV_PIX_FMT_YUYV422) {
69  int x;
70  for(x = 1; x < frame->height*frame->width*2; x += 2)
71  pkt->data[x] ^= 0x80;
72  }
73  pkt->flags |= AV_PKT_FLAG_KEY;
74  *got_packet = 1;
75  return 0;
76 }
77 
79  .name = "rawvideo",
80  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
81  .type = AVMEDIA_TYPE_VIDEO,
83  .init = raw_encode_init,
84  .encode2 = raw_encode,
85 };
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2193
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
int av_image_copy_to_buffer(uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
Copy image data from an image into a buffer.
Definition: imgutils.c:383
misc image utilities
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:2145
static int raw_encode(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: rawenc.c:50
int size
Definition: avcodec.h:1578
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1870
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3535
uint8_t
#define av_cold
Definition: attributes.h:82
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat 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:274
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1577
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:3035
static av_cold int raw_encode_init(AVCodecContext *avctx)
Definition: rawenc.c:35
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters...
Definition: imgutils.c:361
int width
width and height of the video frame
Definition: frame.h:232
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
const char * name
Name of the codec implementation.
Definition: avcodec.h:3542
AVCodec ff_rawvideo_encoder
Definition: rawenc.c:78
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1583
common internal API header
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:254
Raw Video Codec.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:244
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
main external API structure.
Definition: avcodec.h:1642
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1674
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:63
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1683
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
common internal api header.
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3063
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
int height
Definition: frame.h:232
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1554