FFmpeg
rv10enc.c
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1 /*
2  * RV10 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer
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 /**
24  * @file
25  * RV10 encoder
26  */
27 
28 #include "mpegvideo.h"
29 #include "put_bits.h"
30 #include "rv10.h"
31 
33 {
34  int full_frame= 0;
35 
37 
38  put_bits(&s->pb, 1, 1); /* marker */
39 
40  put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P));
41 
42  put_bits(&s->pb, 1, 0); /* not PB-mframe */
43 
44  put_bits(&s->pb, 5, s->qscale);
45 
46  if (s->pict_type == AV_PICTURE_TYPE_I) {
47  /* specific MPEG like DC coding not used */
48  }
49  /* if multiple packets per frame are sent, the position at which
50  to display the macroblocks is coded here */
51  if(!full_frame){
52  if (s->mb_width * s->mb_height >= (1U << 12)) {
53  avpriv_report_missing_feature(s->avctx, "Encoding frames with %d (>= 4096) macroblocks",
54  s->mb_width * s->mb_height);
55  return AVERROR(ENOSYS);
56  }
57  put_bits(&s->pb, 6, 0); /* mb_x */
58  put_bits(&s->pb, 6, 0); /* mb_y */
59  put_bits(&s->pb, 12, s->mb_width * s->mb_height);
60  }
61 
62  put_bits(&s->pb, 3, 0); /* ignored */
63  return 0;
64 }
65 
66 static const AVClass rv10_class = {
67  .class_name = "rv10 encoder",
68  .item_name = av_default_item_name,
69  .option = ff_mpv_generic_options,
70  .version = LIBAVUTIL_VERSION_INT,
71 };
72 
74  .name = "rv10",
75  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
76  .type = AVMEDIA_TYPE_VIDEO,
77  .id = AV_CODEC_ID_RV10,
78  .priv_data_size = sizeof(MpegEncContext),
80  .encode2 = ff_mpv_encode_picture,
81  .close = ff_mpv_encode_end,
83  .priv_class = &rv10_class,
84 };
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:48
static const AVClass rv10_class
Definition: rv10enc.c:66
mpegvideo header.
AVCodec.
Definition: avcodec.h:3481
int qscale
QP.
Definition: mpegvideo.h:204
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
const AVOption ff_mpv_generic_options[]
Definition: mpegvideo_enc.c:85
AVCodec ff_rv10_encoder
Definition: rv10enc.c:73
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
#define U(x)
Definition: vp56_arith.h:37
#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 ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: rv10enc.c:32
#define s(width, name)
Definition: cbs_vp9.c:257
int ff_mpv_encode_init(AVCodecContext *avctx)
Describe the class of an AVClass context structure.
Definition: log.h:67
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
MpegEncContext.
Definition: mpegvideo.h:81
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
PutBitContext pb
bit output
Definition: mpegvideo.h:151
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
int ff_mpv_encode_end(AVCodecContext *avctx)
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
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
Predicted.
Definition: avutil.h:275
bitstream writer API