1 files changed, 83 insertions, 0 deletions
diff --git a/externals/gridflow/format/mpeg3.c b/externals/gridflow/format/mpeg3.c
new file mode 100644
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--- /dev/null
+++ b/externals/gridflow/format/mpeg3.c
@@ -0,0 +1,83 @@
+/*
+	$Id: mpeg3.c 3815 2008-06-06 03:50:40Z matju $
+
+	GridFlow
+	Copyright (c) 2001-2008 by Mathieu Bouchard
+
+	This program is free software; you can redistribute it and/or
+	modify it under the terms of the GNU General Public License
+	as published by the Free Software Foundation; either version 2
+	of the License, or (at your option) any later version.
+
+	See file ../COPYING for further informations on licensing terms.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#define LIBMPEG_INCLUDE_HERE
+#include "../gridflow.h.fcs"
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+\class FormatMPEG3 : Format {
+	mpeg3_t *mpeg;
+	int track;
+	~FormatMPEG3 () {if (mpeg) {mpeg3_close(mpeg); mpeg=0;}}
+	\constructor (t_symbol *mode, string filename) {
+		track=0;
+	// libmpeg3 may be nice, but it won't take a filehandle, only filename
+		if (mode!=gensym("in")) RAISE("read-only, sorry");
+		filename = gf_find_file(filename);
+	#ifdef MPEG3_UNDEFINED_ERROR
+		int err;
+		mpeg = mpeg3_open((char *)filename.data(),&err);
+		post("mpeg error code = %d",err);
+	#else
+		mpeg = mpeg3_open((char *)filename.data());
+	#endif
+		if (!mpeg) RAISE("IO Error: can't open file `%s': %s", filename.data(), strerror(errno));
+	}
+	\decl 0 seek (long frame);
+	\decl 0 rewind ();
+	\decl 0 bang ();
+};
+
+\def 0 seek (long frame) {
+	mpeg3_set_frame(mpeg,clip(frame,0L,mpeg3_video_frames(mpeg,track)-1),track);
+}
+\def 0 rewind () {_0_seek(0,0,0);}
+
+\def 0 bang () {
+	int nframe = mpeg3_get_frame(mpeg,track);
+	int nframes = mpeg3_video_frames(mpeg,track);
+	//post("track=%d; nframe=%d; nframes=%d",track,nframe,nframes);
+	if (nframe >= nframes) {outlet_bang(bself->te_outlet); return;}
+	int sx = mpeg3_video_width(mpeg,track);
+	int sy = mpeg3_video_height(mpeg,track);
+	int channels = 3;
+	/* !@#$ the doc says "You must allocate 4 extra bytes in the
+	last output_row. This is scratch area for the MMX routines." */
+	uint8 *buf = NEWBUF(uint8,sy*sx*channels+16);
+	uint8 *rows[sy];
+	for (int i=0; i<sy; i++) rows[i]=buf+i*sx*channels;
+	mpeg3_read_frame(mpeg,rows,0,0,sx,sy,sx,sy,MPEG3_RGB888,track);
+	GridOutlet out(this,0,new Dim(sy,sx,channels),cast);
+	int bs = out.dim->prod(1);
+	for(int y=0; y<sy; y++) out.send(bs,buf+channels*sx*y);
+	DELBUF(buf);
+//	return INT2NUM(nframe);
+}
+
+\classinfo {install_format("#io.mpeg",4,"mpg mpeg");}
+\end class FormatMPEG3
+void startup_mpeg3 () {
+	\startall
+}