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gif library incompatibility fixes and prefere libungif over libgif. Patch by Joey Parrish <joey@nicewarrior.org>

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9464 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
alex 2003-02-19 16:55:14 +00:00
parent 8432755f2e
commit 33154a7188
2 changed files with 42 additions and 7 deletions
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36
configure vendored
View File

@ -2916,18 +2916,18 @@ int main(void) {
return 0;
}
EOF
if cc_check -lgif && "$TMPO" >> "$TMPLOG" ; then
_gif=yes
_ld_gif="-lgif"
elif cc_check -lungif && "$TMPO" >> "$TMPLOG" ; then
if cc_check -lungif && "$TMPO" >> "$TMPLOG" ; then
_gif=yes
_ld_gif="-lungif"
elif cc_check -lgif $_ld_x11 && "$TMPO" >> "$TMPLOG" ; then
_gif=yes
_ld_gif="-lgif $_ld_x11"
elif cc_check -lungif $_ld_x11 && "$TMPO" >> "$TMPLOG" ; then
_gif=yes
_ld_gif="-lungif $_ld_x11"
elif cc_check -lgif && "$TMPO" >> "$TMPLOG" ; then
_gif=yes
_ld_gif="-lgif"
elif cc_check -lgif $_ld_x11 && "$TMPO" >> "$TMPLOG" ; then
_gif=yes
_ld_gif="-lgif $_ld_x11"
fi
fi
@ -2965,6 +2965,27 @@ fi
echores "$_gif"
if test "$_gif" = yes ; then
echocheck "broken giflib workaround"
_def_gif_tvt_hack='#define HAVE_GIF_TVT_HACK 1'
cat > $TMPC << EOF
#include <gif_lib.h>
int main(void) {
GifFileType gif;
printf("UserData is at address %p\n", gif.UserData);
return 0;
}
EOF
if cc_check "$_ld_gif" && ( "$TMPO" ) >>"$TMPLOG" 2>&1 ; then
_def_gif_tvt_hack='#undef HAVE_GIF_TVT_HACK'
echores "disabled"
else
echores "enabled"
fi
fi
if test "$_vesa" != no ; then
echocheck "VESA support"
if x86 && linux ; then
@ -5293,6 +5314,7 @@ $_def_jpg
/* enable GIF support */
$_def_gif
$_def_gif_4
$_def_gif_tvt_hack
/* enable FreeType support */
$_def_freetype

13
libmpdemux/demux_gif.c
View File

@ -24,9 +24,12 @@ static unsigned char *pallete = NULL;
#define GIF_SIGNATURE (('G' << 16) | ('I' << 8) | 'F')
#ifndef HAVE_GIF_TVT_HACK
// not supported by certain versions of the library
int my_read_gif(GifFileType *gif, uint8_t *buf, int len) {
return stream_read(gif->UserData, buf, len);
}
#endif
int gif_check_file(demuxer_t *demuxer)
{
@ -156,7 +159,17 @@ demuxer_t* demux_open_gif(demuxer_t* demuxer)
// go back to the beginning
stream_seek(demuxer->stream,demuxer->stream->start_pos);
#ifdef HAVE_GIF_TVT_HACK
// without the TVT functionality of libungif, a hard seek must be
// done to the beginning of the file. this is because libgif is
// unable to use mplayer's cache, and without this lseek libgif will
// not read from the beginning of the file and the command will fail.
// with this hack enabled, you will lose the ability to stream a GIF.
lseek(demuxer->stream->fd, 0, SEEK_SET);
gif = DGifOpenFileHandle(demuxer->stream->fd);
#else
gif = DGifOpen(demuxer->stream, my_read_gif);
#endif
if (!gif) {
PrintGifError();
return NULL;