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1 /*
2  * IPU video demuxer
3  * Copyright (c) 2020 Paul B Mahol
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
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  */
22 #include "avformat.h"
23 #include "internal.h"
24 #include "avio_internal.h"
25 #include "rawdec.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavcodec/internal.h"
30 static int ipu_read_probe(const AVProbeData *p)
31 {
32  if (AV_RB32(p->buf) != MKBETAG('i', 'p', 'u', 'm'))
33  return 0;
35  if (AV_RL32(p->buf + 4) == 0)
36  return 0;
38  if (AV_RL16(p->buf + 8) == 0)
39  return 0;
41  if (AV_RL16(p->buf + 10) == 0)
42  return 0;
44  if (AV_RL32(p->buf + 12) == 0)
45  return 0;
48 }
51 {
52  AVIOContext *pb = s->pb;
55  if (!st)
56  return AVERROR(ENOMEM);
57  avio_skip(pb, 8);
60  st->codecpar->width = avio_rl16(pb);
61  st->codecpar->height = avio_rl16(pb);
62  st->start_time = 0;
63  st->duration =
64  st->nb_frames = avio_rl32(pb);
66  avpriv_set_pts_info(st, 64, 1, 25);
68  return 0;
69 }
71 static const AVClass ipu_demuxer_class = {
72  .class_name = "ipu demuxer",
73  .item_name = av_default_item_name,
74  .option = ff_raw_options,
76 };
79  .name = "ipu",
80  .long_name = NULL_IF_CONFIG_SMALL("raw IPU Video"),
81  .read_probe = ipu_read_probe,
82  .read_header = ipu_read_header,
83  .read_packet = ff_raw_read_partial_packet,
84  .extensions = "ipu",
86  .raw_codec_id = AV_CODEC_ID_IPU,
87  .priv_data_size = sizeof(FFRawDemuxerContext),
88  .priv_class = &ipu_demuxer_class,
89 };
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
Definition: version.h:85
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4999
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVInputFormat ff_ipu_demuxer
Definition: ipudec.c:78
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
static int ipu_read_probe(const AVProbeData *p)
Definition: ipudec.c:30
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:91
Format I/O context.
Definition: avformat.h:1247
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
int width
Video only.
Definition: codec_par.h:126
enum AVStreamParseType need_parsing
Definition: avformat.h:1092
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4553
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:91
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:807
static int ipu_read_header(AVFormatContext *s)
Definition: ipudec.c:50
const AVOption ff_raw_options[]
Definition: rawdec.c:128
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawdec.c:35
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:117
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
#define s(width, name)
Definition: cbs_vp9.c:257
Stream structure.
Definition: avformat.h:884
AVIOContext * pb
I/O context.
Definition: avformat.h:1289
Describe the class of an AVClass context structure.
Definition: log.h:67
Use generic index building code.
Definition: avformat.h:463
static const AVClass ipu_demuxer_class
Definition: ipudec.c:71
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:933
maximum score
Definition: avformat.h:453
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
Main libavformat public API header.
common internal api header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:923
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:935
#define MKBETAG(a, b, c, d)
Definition: common.h:479
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1049
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91