FFmpeg
avuienc.c
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1 /*
2  * AVID Meridien encoder
3  *
4  * Copyright (c) 2012 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 "internal.h"
25 #include "libavutil/intreadwrite.h"
26 
28 {
29  if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
30  av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
31  return AVERROR(EINVAL);
32  }
33  if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))
34  return AVERROR(ENOMEM);
35  avctx->extradata_size = 144;
36  memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
37  if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
38  avctx->extradata[19] = 2;
39  } else {
40  avctx->extradata[19] = 1;
41  }
42  memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);
43  AV_WB32(avctx->extradata + 44, avctx->width);
44  AV_WB32(avctx->extradata + 48, avctx->height);
45  memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);
46 
47 
48  return 0;
49 }
50 
52  const AVFrame *pic, int *got_packet)
53 {
54  uint8_t *dst;
55  int i, j, skip, ret, size, interlaced;
56 
57  interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
58 
59  if (avctx->height == 486) {
60  skip = 10;
61  } else {
62  skip = 16;
63  }
64  size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
65  if ((ret = ff_alloc_packet2(avctx, pkt, size, size)) < 0)
66  return ret;
67  dst = pkt->data;
68  if (!interlaced) {
69  memset(dst, 0, avctx->width * skip);
70  dst += avctx->width * skip;
71  }
72 
73  for (i = 0; i <= interlaced; i++) {
74  uint8_t *src;
75  if (interlaced && avctx->height == 486) {
76  src = pic->data[0] + (1 - i) * pic->linesize[0];
77  } else {
78  src = pic->data[0] + i * pic->linesize[0];
79  }
80  memset(dst, 0, avctx->width * skip + 4 * i);
81  dst += avctx->width * skip + 4 * i;
82  for (j = 0; j < avctx->height; j += interlaced + 1) {
83  memcpy(dst, src, avctx->width * 2);
84  src += (interlaced + 1) * pic->linesize[0];
85  dst += avctx->width * 2;
86  }
87  }
88 
89  pkt->flags |= AV_PKT_FLAG_KEY;
90  *got_packet = 1;
91  return 0;
92 }
93 
95  .name = "avui",
96  .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
97  .type = AVMEDIA_TYPE_VIDEO,
98  .id = AV_CODEC_ID_AVUI,
99  .init = avui_encode_init,
100  .encode2 = avui_encode_frame,
102  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
103 };
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:81
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
#define AV_CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: avcodec.h:1029
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static AVPacket pkt
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3481
#define AV_CODEC_CAP_INTRA_ONLY
Codec is intra only.
Definition: avcodec.h:1067
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
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1666
uint8_t * data
Definition: avcodec.h:1477
ptrdiff_t size
Definition: opengl_enc.c:100
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static av_cold int avui_encode_init(AVCodecContext *avctx)
Definition: avuienc.c:27
#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:3488
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
uint8_t interlaced
Definition: mxfenc.c:2217
int width
picture width / height.
Definition: avcodec.h:1738
AVCodec ff_avui_encoder
Definition: avuienc.c:94
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
main external API structure.
Definition: avcodec.h:1565
int extradata_size
Definition: avcodec.h:1667
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: avuienc.c:51
common internal api header.
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:790
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:2222
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame 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.Frame references ownership and permissions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: avcodec.h:1454