FFmpeg
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 {
38 
39 #if FF_API_CODED_FRAME
43 #endif
45  if(!avctx->codec_tag)
47  avctx->bit_rate = ff_guess_coded_bitrate(avctx);
48 
49  return 0;
50 }
51 
52 static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
53  const AVFrame *frame, int *got_packet)
54 {
55  int ret = av_image_get_buffer_size(frame->format,
56  frame->width, frame->height, 1);
57 
58  if (ret < 0)
59  return ret;
60 
61  if ((ret = ff_alloc_packet2(avctx, pkt, ret, ret)) < 0)
62  return ret;
63  if ((ret = av_image_copy_to_buffer(pkt->data, pkt->size,
64  (const uint8_t **)frame->data, frame->linesize,
65  frame->format,
66  frame->width, frame->height, 1)) < 0)
67  return ret;
68 
69  if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
70  frame->format == AV_PIX_FMT_YUYV422) {
71  int x;
72  for(x = 1; x < frame->height*frame->width*2; x += 2)
73  pkt->data[x] ^= 0x80;
74  } else if (avctx->codec_tag == AV_RL32("b64a") && ret > 0 &&
75  frame->format == AV_PIX_FMT_RGBA64BE) {
76  uint64_t v;
77  int x;
78  for (x = 0; x < frame->height * frame->width; x++) {
79  v = AV_RB64(&pkt->data[8 * x]);
80  AV_WB64(&pkt->data[8 * x], v << 48 | v >> 16);
81  }
82  }
83  pkt->flags |= AV_PKT_FLAG_KEY;
84  *got_packet = 1;
85  return 0;
86 }
87 
89  .name = "rawvideo",
90  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
91  .type = AVMEDIA_TYPE_VIDEO,
93  .init = raw_encode_init,
94  .encode2 = raw_encode,
95 };
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
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:453
misc image utilities
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1618
const char * desc
Definition: nvenc.c:68
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:2474
static int raw_encode(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: rawenc.c:52
int size
Definition: avcodec.h:1481
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1778
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3492
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
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:32
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:304
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:205
uint8_t * data
Definition: avcodec.h:1480
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2792
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:1512
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:431
int width
Definition: frame.h:353
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * name
Name of the codec implementation.
Definition: avcodec.h:3499
AVCodec ff_rawvideo_encoder
Definition: rawenc.c:88
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1486
common internal API header
int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)
Get an estimated video bitrate based on frame size, frame rate and coded bits per pixel...
Definition: utils.c:2215
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:378
Raw Video Codec.
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:368
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
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:1568
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:1593
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:67
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2818
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
int height
Definition: frame.h:353
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1457