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Add support for AMV variants of AVI files.

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patch by Vladimir Voroshilov, voroshil gmail com
Date: Sun, 30 Sep 2007 00:30:34 +0700
Subject: Re: [FFmpeg-devel] [PATCH] Demuxer for AMV files

Originally committed as revision 10623 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vladimir Voroshilov 2007-09-29 22:47:34 +00:00 committed by Diego Biurrun
parent 7b93361739
commit 0b04ebb326
1 changed files with 21 additions and 1 deletions
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22
libavformat/avidec.c
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@ -62,6 +62,7 @@ static const char avi_headers[][8] = {
{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19},
{ 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' },
{ 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' },
{ 0 }
};
@ -232,6 +233,8 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
AVStream *st;
AVIStream *ast = NULL;
char str_track[4];
int avih_width=0, avih_height=0;
int amv_file_format=0;
avi->stream_index= -1;
@ -276,6 +279,8 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
avi->is_odml = 1;
url_fskip(pb, size + (size & 1));
break;
case MKTAG('a', 'm', 'v', 'h'):
amv_file_format=1;
case MKTAG('a', 'v', 'i', 'h'):
/* avi header */
/* using frame_period is bad idea */
@ -286,8 +291,11 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
url_fskip(pb, 2 * 4);
get_le32(pb);
get_le32(pb);
avih_width=get_le32(pb);
avih_height=get_le32(pb);
url_fskip(pb, size - 7 * 4);
url_fskip(pb, size - 10 * 4);
break;
case MKTAG('s', 't', 'r', 'h'):
/* stream header */
@ -309,6 +317,8 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
goto fail;
st->priv_data = ast;
}
if(amv_file_format)
tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
#ifdef DEBUG
print_tag("strh", tag1, -1);
@ -416,6 +426,14 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
st = s->streams[stream_index];
switch(codec_type) {
case CODEC_TYPE_VIDEO:
if(amv_file_format){
st->codec->width=avih_width;
st->codec->height=avih_height;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_AMV;
url_fskip(pb, size);
break;
}
get_le32(pb); /* size */
st->codec->width = get_le32(pb);
st->codec->height = get_le32(pb);
@ -486,6 +504,8 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
st->codec->codec_id = CODEC_ID_XAN_DPCM;
st->codec->codec_tag = 0;
}
if (amv_file_format)
st->codec->codec_id = CODEC_ID_ADPCM_IMA_AMV;
break;
default:
st->codec->codec_type = CODEC_TYPE_DATA;