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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 + FF_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  avctx->coded_frame = av_frame_alloc();
48  if (!avctx->coded_frame) {
49  av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
50  return AVERROR(ENOMEM);
51  }
52 
53  return 0;
54 }
55 
57  const AVFrame *pic, int *got_packet)
58 {
59  uint8_t *dst;
60  int i, j, skip, ret, size, interlaced;
61 
62  interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
63 
64  if (avctx->height == 486) {
65  skip = 10;
66  } else {
67  skip = 16;
68  }
69  size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
70  if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
71  return ret;
72  dst = pkt->data;
73  if (!interlaced) {
74  dst += avctx->width * skip;
75  }
76 
77  avctx->coded_frame->key_frame = 1;
79 
80  for (i = 0; i <= interlaced; i++) {
81  uint8_t *src;
82  if (interlaced && avctx->height == 486) {
83  src = pic->data[0] + (1 - i) * pic->linesize[0];
84  } else {
85  src = pic->data[0] + i * pic->linesize[0];
86  }
87  dst += avctx->width * skip + 4 * i;
88  for (j = 0; j < avctx->height; j += interlaced + 1) {
89  memcpy(dst, src, avctx->width * 2);
90  src += (interlaced + 1) * pic->linesize[0];
91  dst += avctx->width * 2;
92  }
93  }
94 
95  pkt->flags |= AV_PKT_FLAG_KEY;
96  *got_packet = 1;
97  return 0;
98 }
99 
101 {
102  av_frame_free(&avctx->coded_frame);
103 
104  return 0;
105 }
106 
108  .name = "avui",
109  .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
110  .type = AVMEDIA_TYPE_VIDEO,
111  .id = AV_CODEC_ID_AVUI,
112  .init = avui_encode_init,
113  .encode2 = avui_encode_frame,
114  .close = avui_encode_close,
115  .capabilities = CODEC_CAP_EXPERIMENTAL,
116  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
117 };
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:83
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1736
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2745
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3181
uint8_t
#define av_cold
Definition: attributes.h:74
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1355
uint8_t * data
Definition: avcodec.h:1162
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:1208
#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
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * name
Name of the codec implementation.
Definition: avcodec.h:3188
Libavcodec external API header.
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1168
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:630
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
uint8_t interlaced
Definition: mxfenc.c:1805
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1414
AVCodec ff_avui_encoder
Definition: avuienc.c:107
AVS_Value src
Definition: avisynth_c.h:482
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
main external API structure.
Definition: avcodec.h:1241
int extradata_size
Definition: avcodec.h:1356
#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:182
static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: avuienc.c:56
common internal api header.
static av_cold int avui_encode_close(AVCodecContext *avctx)
Definition: avuienc.c:100
#define CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: avcodec.h:852
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:1982
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1139
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:250