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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:82
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
#define AV_CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: avcodec.h:1014
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
static AVPacket pkt
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3601
#define AV_CODEC_CAP_INTRA_ONLY
Codec is intra only.
Definition: avcodec.h:1052
uint8_t
#define av_cold
Definition: attributes.h:82
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1791
uint8_t * data
Definition: avcodec.h:1601
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1633
#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 AVERROR(e)
Definition: error.h:43
#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:3608
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1607
uint8_t interlaced
Definition: mxfenc.c:1822
int width
picture width / height.
Definition: avcodec.h:1863
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:215
main external API structure.
Definition: avcodec.h:1676
int extradata_size
Definition: avcodec.h:1792
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
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:1722
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
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:734
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:2435
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1578