v308enc.c
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1 /*
2  * v308 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 "libavutil/intreadwrite.h"
24 #include "avcodec.h"
25 #include "internal.h"
26 
28 {
29  if (avctx->width & 1) {
30  av_log(avctx, AV_LOG_ERROR, "v308 requires width to be even.\n");
31  return AVERROR_INVALIDDATA;
32  }
33 
35 
36  if (!avctx->coded_frame) {
37  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
38  return AVERROR(ENOMEM);
39  }
40 
41  return 0;
42 }
43 
45  const AVFrame *pic, int *got_packet)
46 {
47  uint8_t *dst;
48  uint8_t *y, *u, *v;
49  int i, j, ret;
50 
51  if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 3)) < 0)
52  return ret;
53  dst = pkt->data;
54 
55  avctx->coded_frame->key_frame = 1;
57 
58  y = pic->data[0];
59  u = pic->data[1];
60  v = pic->data[2];
61 
62  for (i = 0; i < avctx->height; i++) {
63  for (j = 0; j < avctx->width; j++) {
64  *dst++ = v[j];
65  *dst++ = y[j];
66  *dst++ = u[j];
67  }
68  y += pic->linesize[0];
69  u += pic->linesize[1];
70  v += pic->linesize[2];
71  }
72 
73  pkt->flags |= AV_PKT_FLAG_KEY;
74  *got_packet = 1;
75  return 0;
76 }
77 
79 {
80  av_freep(&avctx->coded_frame);
81 
82  return 0;
83 }
84 
86  .name = "v308",
87  .type = AVMEDIA_TYPE_VIDEO,
88  .id = AV_CODEC_ID_V308,
89  .init = v308_encode_init,
90  .encode2 = v308_encode_frame,
91  .close = v308_encode_close,
92  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
93  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
94 };
float v
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:76
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:73
AVFrame * coded_frame
the picture in the bitstream
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
uint8_t
#define av_cold
Definition: attributes.h:78
static AVPacket pkt
Definition: demuxing.c:56
uint8_t * data
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:246
static int v308_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: v308enc.c:44
const char * name
Name of the codec implementation.
external API header
int flags
A combination of AV_PKT_FLAG values.
AVCodec ff_v308_encoder
Definition: v308enc.c:85
AVFrame * avcodec_alloc_frame(void)
Allocate an AVFrame and set its fields to default values.
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:144
ret
Definition: avfilter.c:821
int width
picture width / height.
float u
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int size)
Check AVPacket size and/or allocate data.
static av_cold int v308_encode_close(AVCodecContext *avctx)
Definition: v308enc.c:78
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:101
main external API structure.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:148
synthesis window for stochastic i
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFilterBuffer structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Buffer references ownership and permissions
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:87
common internal api header.
function y
Definition: D.m:1
else dst[i][x+y *dst_stride[i]]
Definition: vf_mcdeint.c:160
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:139
static av_cold int v308_encode_init(AVCodecContext *avctx)
Definition: v308enc.c:27
AVPixelFormat
Pixel format.
Definition: pixfmt.h:66
This structure stores compressed data.