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Ingenient MJPEG support, more at http://www.artificis.hu/files/texts/ingenient.txt

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Originally committed as revision 4671 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Beregszaszi 2005-10-29 00:52:02 +00:00
parent c7ea4f1903
commit 84c63c013a
1 changed files with 52 additions and 1 deletions
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53
libavformat/raw.c
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@ -1,6 +1,7 @@
/*
* RAW encoder and decoder
* Copyright (c) 2001 Fabrice Bellard.
* Copyright (c) 2005 Alex Beregszaszi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -120,6 +121,42 @@ static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
}
// http://www.artificis.hu/files/texts/ingenient.txt
static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, size, w, h, unk1, unk2;
if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
return AVERROR_IO; // FIXME
size = get_le32(&s->pb);
w = get_le16(&s->pb);
h = get_le16(&s->pb);
url_fskip(&s->pb, 8); // zero + size (padded?)
url_fskip(&s->pb, 2);
unk1 = get_le16(&s->pb);
unk2 = get_le16(&s->pb);
url_fskip(&s->pb, 22); // ascii timestamp
av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
size, w, h, unk1, unk2);
if (av_new_packet(pkt, size) < 0)
return AVERROR_IO;
pkt->pos = url_ftell(&s->pb);
pkt->stream_index = 0;
ret = get_buffer(&s->pb, pkt->data, size);
if (ret <= 0) {
av_free_packet(pkt);
return AVERROR_IO;
}
pkt->size = ret;
return ret;
}
static int raw_read_close(AVFormatContext *s)
{
return 0;
@ -309,7 +346,7 @@ static int h261_probe(AVProbeData *p)
AVInputFormat shorten_iformat = {
"shn",
"raw shn",
"raw shorten",
0,
NULL,
shorten_read_header,
@ -516,6 +553,18 @@ AVInputFormat mjpeg_iformat = {
.value = CODEC_ID_MJPEG,
};
AVInputFormat ingenient_iformat = {
"ingenient",
"Ingenient MJPEG",
0,
NULL,
video_read_header,
ingenient_read_packet,
raw_read_close,
.extensions = "cgi", // FIXME
.value = CODEC_ID_MJPEG,
};
#ifdef CONFIG_MUXERS
AVOutputFormat mjpeg_oformat = {
"mjpeg",
@ -714,6 +763,8 @@ int raw_init(void)
av_register_input_format(&mjpeg_iformat);
av_register_output_format(&mjpeg_oformat);
av_register_input_format(&ingenient_iformat);
av_register_input_format(&pcm_s16le_iformat);
av_register_output_format(&pcm_s16le_oformat);