FFmpeg  4.3
ingenientdec.c
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1 /*
2  * RAW Ingenient MJPEG demuxer
3  * Copyright (c) 2005 Alex Beregszaszi
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "rawdec.h"
24 #include "libavutil/intreadwrite.h"
25 
26 // http://multimedia.cx/ingenient.txt
27 static int ingenient_probe(const AVProbeData *p)
28 {
29  if ( AV_RN32(p->buf) != AV_RN32("MJPG")
30  || p->buf_size < 50
31  || AV_RB16(p->buf + 48) != 0xffd8)
32  return 0;
33  return AVPROBE_SCORE_MAX * 3 / 4;
34 }
35 
37 {
38  int ret, size, w, h, unk1, unk2;
39 
40  if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
41  return AVERROR(EIO); // FIXME
42 
43  size = avio_rl32(s->pb);
44 
45  w = avio_rl16(s->pb);
46  h = avio_rl16(s->pb);
47 
48  avio_skip(s->pb, 8); // zero + size (padded?)
49  avio_skip(s->pb, 2);
50  unk1 = avio_rl16(s->pb);
51  unk2 = avio_rl16(s->pb);
52  avio_skip(s->pb, 22); // ASCII timestamp
53 
54  av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
55  size, w, h, unk1, unk2);
56 
57  ret = av_get_packet(s->pb, pkt, size);
58  if (ret < 0)
59  return ret;
60  pkt->stream_index = 0;
61  return ret;
62 }
63 
65 
67  .name = "ingenient",
68  .long_name = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
69  .priv_data_size = sizeof(FFRawVideoDemuxerContext),
74  .extensions = "cgi", // FIXME
75  .raw_codec_id = AV_CODEC_ID_MJPEG,
76  .priv_class = &ingenient_demuxer_class,
77 };
ff_raw_video_read_header
int ff_raw_video_read_header(AVFormatContext *s)
Definition: rawdec.c:71
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
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:406
AV_RB16
#define AV_RB16
Definition: intreadwrite.h:53
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
ingenient_read_packet
static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ingenientdec.c:36
ff_ingenient_demuxer
AVInputFormat ff_ingenient_demuxer
Definition: ingenientdec.c:66
AVInputFormat
Definition: avformat.h:636
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:641
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
rawdec.h
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AV_RN32
#define AV_RN32(p)
Definition: intreadwrite.h:364
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
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:186
size
int size
Definition: twinvq_data.h:11134
FFRawVideoDemuxerContext
Definition: rawdec.h:29
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
ingenient_probe
static int ingenient_probe(const AVProbeData *p)
Definition: ingenientdec.c:27
av_get_packet
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:304
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
w
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo ug o o w
Definition: fate.txt:150
avformat.h
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
FF_RAWVIDEO_DEMUXER_CLASS
#define FF_RAWVIDEO_DEMUXER_CLASS(name)
Definition: rawdec.h:63
AVPacket::stream_index
int stream_index
Definition: packet.h:357
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
AVPacket
This structure stores compressed data.
Definition: packet.h:332
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038