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 "encode.h"
25 #include "internal.h"
26 #include "libavutil/intreadwrite.h"
27 
29 {
30  if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
31  av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
32  return AVERROR(EINVAL);
33  }
34  if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))
35  return AVERROR(ENOMEM);
36  avctx->extradata_size = 144;
37  memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
38  if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
39  avctx->extradata[19] = 2;
40  } else {
41  avctx->extradata[19] = 1;
42  }
43  memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);
44  AV_WB32(avctx->extradata + 44, avctx->width);
45  AV_WB32(avctx->extradata + 48, avctx->height);
46  memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);
47 
48 
49  return 0;
50 }
51 
53  const AVFrame *pic, int *got_packet)
54 {
55  uint8_t *dst;
56  int i, j, skip, ret, size, interlaced;
57 
59 
60  if (avctx->height == 486) {
61  skip = 10;
62  } else {
63  skip = 16;
64  }
65  size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
66  if ((ret = ff_get_encode_buffer(avctx, pkt, size, 0)) < 0)
67  return ret;
68  dst = pkt->data;
69  if (!interlaced) {
70  memset(dst, 0, avctx->width * skip);
71  dst += avctx->width * skip;
72  }
73 
74  for (i = 0; i <= interlaced; i++) {
75  uint8_t *src;
76  if (interlaced && avctx->height == 486) {
77  src = pic->data[0] + (1 - i) * pic->linesize[0];
78  } else {
79  src = pic->data[0] + i * pic->linesize[0];
80  }
81  memset(dst, 0, avctx->width * skip + 4 * i);
82  dst += avctx->width * skip + 4 * i;
83  for (j = 0; j < avctx->height; j += interlaced + 1) {
84  memcpy(dst, src, avctx->width * 2);
85  src += (interlaced + 1) * pic->linesize[0];
86  dst += avctx->width * 2;
87  }
88  }
89 
91  *got_packet = 1;
92  return 0;
93 }
94 
96  .name = "avui",
97  .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
98  .type = AVMEDIA_TYPE_VIDEO,
99  .id = AV_CODEC_ID_AVUI,
100  .init = avui_encode_init,
101  .encode2 = avui_encode_frame,
103  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
104  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
105 };
AVCodec
AVCodec.
Definition: codec.h:197
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AVERROR
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
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:365
AVCodecContext::field_order
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:1095
encode.h
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:396
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
AV_CODEC_CAP_EXPERIMENTAL
#define AV_CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: codec.h:100
av_cold
#define av_cold
Definition: attributes.h:90
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:603
intreadwrite.h
ff_avui_encoder
const AVCodec ff_avui_encoder
Definition: avuienc.c:95
AV_CODEC_ID_AVUI
@ AV_CODEC_ID_AVUI
Definition: codec_id.h:252
avui_encode_init
static av_cold int avui_encode_init(AVCodecContext *avctx)
Definition: avuienc.c:28
src
#define src
Definition: vp8dsp.c:255
AV_WB32
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
size
int size
Definition: twinvq_data.h:10344
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:371
interlaced
uint8_t interlaced
Definition: mxfenc.c:2208
i
int i
Definition: input.c:407
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:602
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:204
AVCodecContext::height
int height
Definition: avcodec.h:674
avcodec.h
ret
ret
Definition: filter_design.txt:187
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: avcodec.h:192
AV_PIX_FMT_UYVY422
@ AV_PIX_FMT_UYVY422
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:81
AVCodecContext
main external API structure.
Definition: avcodec.h:501
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:81
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
avui_encode_frame
static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: avuienc.c:52
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_FIELD_PROGRESSIVE
@ AV_FIELD_PROGRESSIVE
Definition: codec_par.h:38
AVPacket
This structure stores compressed data.
Definition: packet.h:342
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:674
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28