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authorLucas Eckels <eckels@google.com>2012-08-06 15:16:01 -0700
committerLucas Eckels <eckels@google.com>2012-08-08 09:29:12 -0700
commit8e01cdce135d5d816f92d7bb83f9a930aa1b45ae (patch)
treec6870e1b56df8002752594817dc025cdf3069ee6 /examples
parente7eb48f3d04c7ef0a5aff29f0d4ed716d0f79007 (diff)
downloadlibvorbis-8e01cdce135d5d816f92d7bb83f9a930aa1b45ae.tar.gz
Add libvorbis 1.3.1 source.
Change-Id: I5e5d7b25e401a4940af0c0a6ab7ce3f6b42e0803
Diffstat (limited to 'examples')
-rw-r--r--examples/Makefile.am34
-rw-r--r--examples/Makefile.in524
-rw-r--r--examples/chaining_example.c72
-rw-r--r--examples/decoder_example.c314
-rw-r--r--examples/encoder_example.c252
-rwxr-xr-xexamples/frameview.pl630
-rw-r--r--examples/seeking_example.c259
-rw-r--r--examples/vorbisfile_example.c92
8 files changed, 2177 insertions, 0 deletions
diff --git a/examples/Makefile.am b/examples/Makefile.am
new file mode 100644
index 0000000..4518976
--- /dev/null
+++ b/examples/Makefile.am
@@ -0,0 +1,34 @@
+## Process this file with automake to produce Makefile.in
+
+AUTOMAKE_OPTIONS = foreign
+
+INCLUDES = -I$(top_srcdir)/include @OGG_CFLAGS@
+
+noinst_PROGRAMS = decoder_example encoder_example chaining_example\
+ vorbisfile_example seeking_example
+
+EXTRA_DIST = frameview.pl
+
+# uncomment to build static executables from the example code
+#LDFLAGS = -all-static
+
+decoder_example_SOURCES = decoder_example.c
+decoder_example_LDADD = $(top_builddir)/lib/libvorbis.la
+
+encoder_example_SOURCES = encoder_example.c
+encoder_example_LDADD = $(top_builddir)/lib/libvorbisenc.la $(top_builddir)/lib/libvorbis.la
+
+chaining_example_SOURCES = chaining_example.c
+chaining_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la
+
+vorbisfile_example_SOURCES = vorbisfile_example.c
+vorbisfile_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la
+
+seeking_example_SOURCES = seeking_example.c
+seeking_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la
+
+debug:
+ $(MAKE) all CFLAGS="@DEBUG@"
+
+profile:
+ $(MAKE) all CFLAGS="@PROFILE@"
diff --git a/examples/Makefile.in b/examples/Makefile.in
new file mode 100644
index 0000000..2488755
--- /dev/null
+++ b/examples/Makefile.in
@@ -0,0 +1,524 @@
+# Makefile.in generated by automake 1.10.2 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
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+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+target_triplet = @target@
+noinst_PROGRAMS = decoder_example$(EXEEXT) encoder_example$(EXEEXT) \
+ chaining_example$(EXEEXT) vorbisfile_example$(EXEEXT) \
+ seeking_example$(EXEEXT)
+subdir = examples
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+chaining_example_OBJECTS = $(am_chaining_example_OBJECTS)
+chaining_example_DEPENDENCIES = $(top_builddir)/lib/libvorbisfile.la \
+ $(top_builddir)/lib/libvorbis.la
+am_decoder_example_OBJECTS = decoder_example.$(OBJEXT)
+decoder_example_OBJECTS = $(am_decoder_example_OBJECTS)
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+am_encoder_example_OBJECTS = encoder_example.$(OBJEXT)
+encoder_example_OBJECTS = $(am_encoder_example_OBJECTS)
+encoder_example_DEPENDENCIES = $(top_builddir)/lib/libvorbisenc.la \
+ $(top_builddir)/lib/libvorbis.la
+am_seeking_example_OBJECTS = seeking_example.$(OBJEXT)
+seeking_example_OBJECTS = $(am_seeking_example_OBJECTS)
+seeking_example_DEPENDENCIES = $(top_builddir)/lib/libvorbisfile.la \
+ $(top_builddir)/lib/libvorbis.la
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+ $(LDFLAGS) -o $@
+SOURCES = $(chaining_example_SOURCES) $(decoder_example_SOURCES) \
+ $(encoder_example_SOURCES) $(seeking_example_SOURCES) \
+ $(vorbisfile_example_SOURCES)
+DIST_SOURCES = $(chaining_example_SOURCES) $(decoder_example_SOURCES) \
+ $(encoder_example_SOURCES) $(seeking_example_SOURCES) \
+ $(vorbisfile_example_SOURCES)
+ETAGS = etags
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+OBJDUMP = @OBJDUMP@
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+OGG_CFLAGS = @OGG_CFLAGS@
+OGG_LIBS = @OGG_LIBS@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
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+PATH_SEPARATOR = @PATH_SEPARATOR@
+PDFLATEX = @PDFLATEX@
+PKG_CONFIG = @PKG_CONFIG@
+PROFILE = @PROFILE@
+RANLIB = @RANLIB@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+VERSION = @VERSION@
+VE_LIB_AGE = @VE_LIB_AGE@
+VE_LIB_CURRENT = @VE_LIB_CURRENT@
+VE_LIB_REVISION = @VE_LIB_REVISION@
+VF_LIB_AGE = @VF_LIB_AGE@
+VF_LIB_CURRENT = @VF_LIB_CURRENT@
+VF_LIB_REVISION = @VF_LIB_REVISION@
+VORBIS_LIBS = @VORBIS_LIBS@
+V_LIB_AGE = @V_LIB_AGE@
+V_LIB_CURRENT = @V_LIB_CURRENT@
+V_LIB_REVISION = @V_LIB_REVISION@
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+AUTOMAKE_OPTIONS = foreign
+INCLUDES = -I$(top_srcdir)/include @OGG_CFLAGS@
+EXTRA_DIST = frameview.pl
+
+# uncomment to build static executables from the example code
+#LDFLAGS = -all-static
+decoder_example_SOURCES = decoder_example.c
+decoder_example_LDADD = $(top_builddir)/lib/libvorbis.la
+encoder_example_SOURCES = encoder_example.c
+encoder_example_LDADD = $(top_builddir)/lib/libvorbisenc.la $(top_builddir)/lib/libvorbis.la
+chaining_example_SOURCES = chaining_example.c
+chaining_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la
+vorbisfile_example_SOURCES = vorbisfile_example.c
+vorbisfile_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la
+seeking_example_SOURCES = seeking_example.c
+seeking_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la
+all: all-am
+
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+ done; \
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+ cd $(top_srcdir) && \
+ $(AUTOMAKE) --foreign examples/Makefile
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+ @case '$?' in \
+ *config.status*) \
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+
+distclean: distclean-am
+ -rm -rf ./$(DEPDIR)
+ -rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+ distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-info: install-info-am
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-ps: install-ps-am
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+ -rm -rf ./$(DEPDIR)
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+ clean-libtool clean-noinstPROGRAMS ctags distclean \
+ distclean-compile distclean-generic distclean-libtool \
+ distclean-tags distdir dvi dvi-am html html-am info info-am \
+ install install-am install-data install-data-am install-dvi \
+ install-dvi-am install-exec install-exec-am install-html \
+ install-html-am install-info install-info-am install-man \
+ install-pdf install-pdf-am install-ps install-ps-am \
+ install-strip installcheck installcheck-am installdirs \
+ maintainer-clean maintainer-clean-generic mostlyclean \
+ mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+ pdf pdf-am ps ps-am tags uninstall uninstall-am
+
+
+debug:
+ $(MAKE) all CFLAGS="@DEBUG@"
+
+profile:
+ $(MAKE) all CFLAGS="@PROFILE@"
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/examples/chaining_example.c b/examples/chaining_example.c
new file mode 100644
index 0000000..526a831
--- /dev/null
+++ b/examples/chaining_example.c
@@ -0,0 +1,72 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: illustrate simple use of chained bitstream and vorbisfile.a
+ last mod: $Id: chaining_example.c 16243 2009-07-10 02:49:31Z xiphmont $
+
+ ********************************************************************/
+
+#include <stdlib.h>
+#include <vorbis/codec.h>
+#include <vorbis/vorbisfile.h>
+
+#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+int main(){
+ OggVorbis_File ov;
+ int i;
+
+#ifdef _WIN32 /* We need to set stdin to binary mode. Damn windows. */
+ /* Beware the evil ifdef. We avoid these where we can, but this one we
+ cannot. Don't add any more, you'll probably go to hell if you do. */
+ _setmode( _fileno( stdin ), _O_BINARY );
+#endif
+
+ /* open the file/pipe on stdin */
+ if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
+ printf("Could not open input as an OggVorbis file.\n\n");
+ exit(1);
+ }
+
+ /* print details about each logical bitstream in the input */
+ if(ov_seekable(&ov)){
+ printf("Input bitstream contained %ld logical bitstream section(s).\n",
+ ov_streams(&ov));
+ printf("Total bitstream samples: %ld\n\n",
+ (long)ov_pcm_total(&ov,-1));
+ printf("Total bitstream playing time: %ld seconds\n\n",
+ (long)ov_time_total(&ov,-1));
+
+ }else{
+ printf("Standard input was not seekable.\n"
+ "First logical bitstream information:\n\n");
+ }
+
+ for(i=0;i<ov_streams(&ov);i++){
+ vorbis_info *vi=ov_info(&ov,i);
+ printf("\tlogical bitstream section %d information:\n",i+1);
+ printf("\t\t%ldHz %d channels bitrate %ldkbps serial number=%ld\n",
+ vi->rate,vi->channels,ov_bitrate(&ov,i)/1000,
+ ov_serialnumber(&ov,i));
+ printf("\t\theader length: %ld bytes\n",(long)
+ (ov.dataoffsets[i]-ov.offsets[i]));
+ printf("\t\tcompressed length: %ld bytes\n",(long)(ov_raw_total(&ov,i)));
+ printf("\t\tplay time: %lds\n",(long)ov_time_total(&ov,i));
+ }
+
+ ov_clear(&ov);
+ return 0;
+}
+
diff --git a/examples/decoder_example.c b/examples/decoder_example.c
new file mode 100644
index 0000000..1cd7e34
--- /dev/null
+++ b/examples/decoder_example.c
@@ -0,0 +1,314 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: simple example decoder
+ last mod: $Id: decoder_example.c 16243 2009-07-10 02:49:31Z xiphmont $
+
+ ********************************************************************/
+
+/* Takes a vorbis bitstream from stdin and writes raw stereo PCM to
+ stdout. Decodes simple and chained OggVorbis files from beginning
+ to end. Vorbisfile.a is somewhat more complex than the code below. */
+
+/* Note that this is POSIX, not ANSI code */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <vorbis/codec.h>
+
+#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+#if defined(__MACOS__) && defined(__MWERKS__)
+#include <console.h> /* CodeWarrior's Mac "command-line" support */
+#endif
+
+ogg_int16_t convbuffer[4096]; /* take 8k out of the data segment, not the stack */
+int convsize=4096;
+
+extern void _VDBG_dump(void);
+
+int main(){
+ ogg_sync_state oy; /* sync and verify incoming physical bitstream */
+ ogg_stream_state os; /* take physical pages, weld into a logical
+ stream of packets */
+ ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */
+ ogg_packet op; /* one raw packet of data for decode */
+
+ vorbis_info vi; /* struct that stores all the static vorbis bitstream
+ settings */
+ vorbis_comment vc; /* struct that stores all the bitstream user comments */
+ vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
+ vorbis_block vb; /* local working space for packet->PCM decode */
+
+ char *buffer;
+ int bytes;
+
+#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
+ /* Beware the evil ifdef. We avoid these where we can, but this one we
+ cannot. Don't add any more, you'll probably go to hell if you do. */
+ _setmode( _fileno( stdin ), _O_BINARY );
+ _setmode( _fileno( stdout ), _O_BINARY );
+#endif
+
+#if defined(macintosh) && defined(__MWERKS__)
+ {
+ int argc;
+ char **argv;
+ argc=ccommand(&argv); /* get a "command line" from the Mac user */
+ /* this also lets the user set stdin and stdout */
+ }
+#endif
+
+ /********** Decode setup ************/
+
+ ogg_sync_init(&oy); /* Now we can read pages */
+
+ while(1){ /* we repeat if the bitstream is chained */
+ int eos=0;
+ int i;
+
+ /* grab some data at the head of the stream. We want the first page
+ (which is guaranteed to be small and only contain the Vorbis
+ stream initial header) We need the first page to get the stream
+ serialno. */
+
+ /* submit a 4k block to libvorbis' Ogg layer */
+ buffer=ogg_sync_buffer(&oy,4096);
+ bytes=fread(buffer,1,4096,stdin);
+ ogg_sync_wrote(&oy,bytes);
+
+ /* Get the first page. */
+ if(ogg_sync_pageout(&oy,&og)!=1){
+ /* have we simply run out of data? If so, we're done. */
+ if(bytes<4096)break;
+
+ /* error case. Must not be Vorbis data */
+ fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
+ exit(1);
+ }
+
+ /* Get the serial number and set up the rest of decode. */
+ /* serialno first; use it to set up a logical stream */
+ ogg_stream_init(&os,ogg_page_serialno(&og));
+
+ /* extract the initial header from the first page and verify that the
+ Ogg bitstream is in fact Vorbis data */
+
+ /* I handle the initial header first instead of just having the code
+ read all three Vorbis headers at once because reading the initial
+ header is an easy way to identify a Vorbis bitstream and it's
+ useful to see that functionality seperated out. */
+
+ vorbis_info_init(&vi);
+ vorbis_comment_init(&vc);
+ if(ogg_stream_pagein(&os,&og)<0){
+ /* error; stream version mismatch perhaps */
+ fprintf(stderr,"Error reading first page of Ogg bitstream data.\n");
+ exit(1);
+ }
+
+ if(ogg_stream_packetout(&os,&op)!=1){
+ /* no page? must not be vorbis */
+ fprintf(stderr,"Error reading initial header packet.\n");
+ exit(1);
+ }
+
+ if(vorbis_synthesis_headerin(&vi,&vc,&op)<0){
+ /* error case; not a vorbis header */
+ fprintf(stderr,"This Ogg bitstream does not contain Vorbis "
+ "audio data.\n");
+ exit(1);
+ }
+
+ /* At this point, we're sure we're Vorbis. We've set up the logical
+ (Ogg) bitstream decoder. Get the comment and codebook headers and
+ set up the Vorbis decoder */
+
+ /* The next two packets in order are the comment and codebook headers.
+ They're likely large and may span multiple pages. Thus we read
+ and submit data until we get our two packets, watching that no
+ pages are missing. If a page is missing, error out; losing a
+ header page is the only place where missing data is fatal. */
+
+ i=0;
+ while(i<2){
+ while(i<2){
+ int result=ogg_sync_pageout(&oy,&og);
+ if(result==0)break; /* Need more data */
+ /* Don't complain about missing or corrupt data yet. We'll
+ catch it at the packet output phase */
+ if(result==1){
+ ogg_stream_pagein(&os,&og); /* we can ignore any errors here
+ as they'll also become apparent
+ at packetout */
+ while(i<2){
+ result=ogg_stream_packetout(&os,&op);
+ if(result==0)break;
+ if(result<0){
+ /* Uh oh; data at some point was corrupted or missing!
+ We can't tolerate that in a header. Die. */
+ fprintf(stderr,"Corrupt secondary header. Exiting.\n");
+ exit(1);
+ }
+ result=vorbis_synthesis_headerin(&vi,&vc,&op);
+ if(result<0){
+ fprintf(stderr,"Corrupt secondary header. Exiting.\n");
+ exit(1);
+ }
+ i++;
+ }
+ }
+ }
+ /* no harm in not checking before adding more */
+ buffer=ogg_sync_buffer(&oy,4096);
+ bytes=fread(buffer,1,4096,stdin);
+ if(bytes==0 && i<2){
+ fprintf(stderr,"End of file before finding all Vorbis headers!\n");
+ exit(1);
+ }
+ ogg_sync_wrote(&oy,bytes);
+ }
+
+ /* Throw the comments plus a few lines about the bitstream we're
+ decoding */
+ {
+ char **ptr=vc.user_comments;
+ while(*ptr){
+ fprintf(stderr,"%s\n",*ptr);
+ ++ptr;
+ }
+ fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi.channels,vi.rate);
+ fprintf(stderr,"Encoded by: %s\n\n",vc.vendor);
+ }
+
+ convsize=4096/vi.channels;
+
+ /* OK, got and parsed all three headers. Initialize the Vorbis
+ packet->PCM decoder. */
+ if(vorbis_synthesis_init(&vd,&vi)==0){ /* central decode state */
+ vorbis_block_init(&vd,&vb); /* local state for most of the decode
+ so multiple block decodes can
+ proceed in parallel. We could init
+ multiple vorbis_block structures
+ for vd here */
+
+ /* The rest is just a straight decode loop until end of stream */
+ while(!eos){
+ while(!eos){
+ int result=ogg_sync_pageout(&oy,&og);
+ if(result==0)break; /* need more data */
+ if(result<0){ /* missing or corrupt data at this page position */
+ fprintf(stderr,"Corrupt or missing data in bitstream; "
+ "continuing...\n");
+ }else{
+ ogg_stream_pagein(&os,&og); /* can safely ignore errors at
+ this point */
+ while(1){
+ result=ogg_stream_packetout(&os,&op);
+
+ if(result==0)break; /* need more data */
+ if(result<0){ /* missing or corrupt data at this page position */
+ /* no reason to complain; already complained above */
+ }else{
+ /* we have a packet. Decode it */
+ float **pcm;
+ int samples;
+
+ if(vorbis_synthesis(&vb,&op)==0) /* test for success! */
+ vorbis_synthesis_blockin(&vd,&vb);
+ /*
+
+ **pcm is a multichannel float vector. In stereo, for
+ example, pcm[0] is left, and pcm[1] is right. samples is
+ the size of each channel. Convert the float values
+ (-1.<=range<=1.) to whatever PCM format and write it out */
+
+ while((samples=vorbis_synthesis_pcmout(&vd,&pcm))>0){
+ int j;
+ int clipflag=0;
+ int bout=(samples<convsize?samples:convsize);
+
+ /* convert floats to 16 bit signed ints (host order) and
+ interleave */
+ for(i=0;i<vi.channels;i++){
+ ogg_int16_t *ptr=convbuffer+i;
+ float *mono=pcm[i];
+ for(j=0;j<bout;j++){
+#if 1
+ int val=floor(mono[j]*32767.f+.5f);
+#else /* optional dither */
+ int val=mono[j]*32767.f+drand48()-0.5f;
+#endif
+ /* might as well guard against clipping */
+ if(val>32767){
+ val=32767;
+ clipflag=1;
+ }
+ if(val<-32768){
+ val=-32768;
+ clipflag=1;
+ }
+ *ptr=val;
+ ptr+=vi.channels;
+ }
+ }
+
+ if(clipflag)
+ fprintf(stderr,"Clipping in frame %ld\n",(long)(vd.sequence));
+
+
+ fwrite(convbuffer,2*vi.channels,bout,stdout);
+
+ vorbis_synthesis_read(&vd,bout); /* tell libvorbis how
+ many samples we
+ actually consumed */
+ }
+ }
+ }
+ if(ogg_page_eos(&og))eos=1;
+ }
+ }
+ if(!eos){
+ buffer=ogg_sync_buffer(&oy,4096);
+ bytes=fread(buffer,1,4096,stdin);
+ ogg_sync_wrote(&oy,bytes);
+ if(bytes==0)eos=1;
+ }
+ }
+
+ /* ogg_page and ogg_packet structs always point to storage in
+ libvorbis. They're never freed or manipulated directly */
+
+ vorbis_block_clear(&vb);
+ vorbis_dsp_clear(&vd);
+ }else{
+ fprintf(stderr,"Error: Corrupt header during playback initialization.\n");
+ }
+
+ /* clean up this logical bitstream; before exit we see if we're
+ followed by another [chained] */
+
+ ogg_stream_clear(&os);
+ vorbis_comment_clear(&vc);
+ vorbis_info_clear(&vi); /* must be called last */
+ }
+
+ /* OK, clean up the framer */
+ ogg_sync_clear(&oy);
+
+ fprintf(stderr,"Done.\n");
+ return(0);
+}
diff --git a/examples/encoder_example.c b/examples/encoder_example.c
new file mode 100644
index 0000000..6eecf91
--- /dev/null
+++ b/examples/encoder_example.c
@@ -0,0 +1,252 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: simple example encoder
+ last mod: $Id: encoder_example.c 16946 2010-03-03 16:12:40Z xiphmont $
+
+ ********************************************************************/
+
+/* takes a stereo 16bit 44.1kHz WAV file from stdin and encodes it into
+ a Vorbis bitstream */
+
+/* Note that this is POSIX, not ANSI, code */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <math.h>
+#include <vorbis/vorbisenc.h>
+
+#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+#if defined(__MACOS__) && defined(__MWERKS__)
+#include <console.h> /* CodeWarrior's Mac "command-line" support */
+#endif
+
+#define READ 1024
+signed char readbuffer[READ*4+44]; /* out of the data segment, not the stack */
+
+int main(){
+ ogg_stream_state os; /* take physical pages, weld into a logical
+ stream of packets */
+ ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */
+ ogg_packet op; /* one raw packet of data for decode */
+
+ vorbis_info vi; /* struct that stores all the static vorbis bitstream
+ settings */
+ vorbis_comment vc; /* struct that stores all the user comments */
+
+ vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
+ vorbis_block vb; /* local working space for packet->PCM decode */
+
+ int eos=0,ret;
+ int i, founddata;
+
+#if defined(macintosh) && defined(__MWERKS__)
+ int argc = 0;
+ char **argv = NULL;
+ argc = ccommand(&argv); /* get a "command line" from the Mac user */
+ /* this also lets the user set stdin and stdout */
+#endif
+
+ /* we cheat on the WAV header; we just bypass 44 bytes (simplest WAV
+ header is 44 bytes) and assume that the data is 44.1khz, stereo, 16 bit
+ little endian pcm samples. This is just an example, after all. */
+
+#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
+ /* if we were reading/writing a file, it would also need to in
+ binary mode, eg, fopen("file.wav","wb"); */
+ /* Beware the evil ifdef. We avoid these where we can, but this one we
+ cannot. Don't add any more, you'll probably go to hell if you do. */
+ _setmode( _fileno( stdin ), _O_BINARY );
+ _setmode( _fileno( stdout ), _O_BINARY );
+#endif
+
+
+ /* we cheat on the WAV header; we just bypass the header and never
+ verify that it matches 16bit/stereo/44.1kHz. This is just an
+ example, after all. */
+
+ readbuffer[0] = '\0';
+ for (i=0, founddata=0; i<30 && ! feof(stdin) && ! ferror(stdin); i++)
+ {
+ fread(readbuffer,1,2,stdin);
+
+ if ( ! strncmp((char*)readbuffer, "da", 2) ){
+ founddata = 1;
+ fread(readbuffer,1,6,stdin);
+ break;
+ }
+ }
+
+ /********** Encode setup ************/
+
+ vorbis_info_init(&vi);
+
+ /* choose an encoding mode. A few possibilities commented out, one
+ actually used: */
+
+ /*********************************************************************
+ Encoding using a VBR quality mode. The usable range is -.1
+ (lowest quality, smallest file) to 1. (highest quality, largest file).
+ Example quality mode .4: 44kHz stereo coupled, roughly 128kbps VBR
+
+ ret = vorbis_encode_init_vbr(&vi,2,44100,.4);
+
+ ---------------------------------------------------------------------
+
+ Encoding using an average bitrate mode (ABR).
+ example: 44kHz stereo coupled, average 128kbps VBR
+
+ ret = vorbis_encode_init(&vi,2,44100,-1,128000,-1);
+
+ ---------------------------------------------------------------------
+
+ Encode using a quality mode, but select that quality mode by asking for
+ an approximate bitrate. This is not ABR, it is true VBR, but selected
+ using the bitrate interface, and then turning bitrate management off:
+
+ ret = ( vorbis_encode_setup_managed(&vi,2,44100,-1,128000,-1) ||
+ vorbis_encode_ctl(&vi,OV_ECTL_RATEMANAGE2_SET,NULL) ||
+ vorbis_encode_setup_init(&vi));
+
+ *********************************************************************/
+
+ ret=vorbis_encode_init_vbr(&vi,2,44100,0.1);
+
+ /* do not continue if setup failed; this can happen if we ask for a
+ mode that libVorbis does not support (eg, too low a bitrate, etc,
+ will return 'OV_EIMPL') */
+
+ if(ret)exit(1);
+
+ /* add a comment */
+ vorbis_comment_init(&vc);
+ vorbis_comment_add_tag(&vc,"ENCODER","encoder_example.c");
+
+ /* set up the analysis state and auxiliary encoding storage */
+ vorbis_analysis_init(&vd,&vi);
+ vorbis_block_init(&vd,&vb);
+
+ /* set up our packet->stream encoder */
+ /* pick a random serial number; that way we can more likely build
+ chained streams just by concatenation */
+ srand(time(NULL));
+ ogg_stream_init(&os,rand());
+
+ /* Vorbis streams begin with three headers; the initial header (with
+ most of the codec setup parameters) which is mandated by the Ogg
+ bitstream spec. The second header holds any comment fields. The
+ third header holds the bitstream codebook. We merely need to
+ make the headers, then pass them to libvorbis one at a time;
+ libvorbis handles the additional Ogg bitstream constraints */
+
+ {
+ ogg_packet header;
+ ogg_packet header_comm;
+ ogg_packet header_code;
+
+ vorbis_analysis_headerout(&vd,&vc,&header,&header_comm,&header_code);
+ ogg_stream_packetin(&os,&header); /* automatically placed in its own
+ page */
+ ogg_stream_packetin(&os,&header_comm);
+ ogg_stream_packetin(&os,&header_code);
+
+ /* This ensures the actual
+ * audio data will start on a new page, as per spec
+ */
+ while(!eos){
+ int result=ogg_stream_flush(&os,&og);
+ if(result==0)break;
+ fwrite(og.header,1,og.header_len,stdout);
+ fwrite(og.body,1,og.body_len,stdout);
+ }
+
+ }
+
+ while(!eos){
+ long i;
+ long bytes=fread(readbuffer,1,READ*4,stdin); /* stereo hardwired here */
+
+ if(bytes==0){
+ /* end of file. this can be done implicitly in the mainline,
+ but it's easier to see here in non-clever fashion.
+ Tell the library we're at end of stream so that it can handle
+ the last frame and mark end of stream in the output properly */
+ vorbis_analysis_wrote(&vd,0);
+
+ }else{
+ /* data to encode */
+
+ /* expose the buffer to submit data */
+ float **buffer=vorbis_analysis_buffer(&vd,READ);
+
+ /* uninterleave samples */
+ for(i=0;i<bytes/4;i++){
+ buffer[0][i]=((readbuffer[i*4+1]<<8)|
+ (0x00ff&(int)readbuffer[i*4]))/32768.f;
+ buffer[1][i]=((readbuffer[i*4+3]<<8)|
+ (0x00ff&(int)readbuffer[i*4+2]))/32768.f;
+ }
+
+ /* tell the library how much we actually submitted */
+ vorbis_analysis_wrote(&vd,i);
+ }
+
+ /* vorbis does some data preanalysis, then divvies up blocks for
+ more involved (potentially parallel) processing. Get a single
+ block for encoding now */
+ while(vorbis_analysis_blockout(&vd,&vb)==1){
+
+ /* analysis, assume we want to use bitrate management */
+ vorbis_analysis(&vb,NULL);
+ vorbis_bitrate_addblock(&vb);
+
+ while(vorbis_bitrate_flushpacket(&vd,&op)){
+
+ /* weld the packet into the bitstream */
+ ogg_stream_packetin(&os,&op);
+
+ /* write out pages (if any) */
+ while(!eos){
+ int result=ogg_stream_pageout(&os,&og);
+ if(result==0)break;
+ fwrite(og.header,1,og.header_len,stdout);
+ fwrite(og.body,1,og.body_len,stdout);
+
+ /* this could be set above, but for illustrative purposes, I do
+ it here (to show that vorbis does know where the stream ends) */
+
+ if(ogg_page_eos(&og))eos=1;
+ }
+ }
+ }
+ }
+
+ /* clean up and exit. vorbis_info_clear() must be called last */
+
+ ogg_stream_clear(&os);
+ vorbis_block_clear(&vb);
+ vorbis_dsp_clear(&vd);
+ vorbis_comment_clear(&vc);
+ vorbis_info_clear(&vi);
+
+ /* ogg_page and ogg_packet structs always point to storage in
+ libvorbis. They're never freed or manipulated directly */
+
+ fprintf(stderr,"Done.\n");
+ return(0);
+}
diff --git a/examples/frameview.pl b/examples/frameview.pl
new file mode 100755
index 0000000..edcf5d0
--- /dev/null
+++ b/examples/frameview.pl
@@ -0,0 +1,630 @@
+#!/usr/bin/perl -w
+use strict;
+use Tk;
+use Tk::Xrm;
+use Tk qw(exit);
+
+my $version="Analyzer 20020429";
+
+my %bases;
+my $first_file=undef;
+my $last_file=undef;
+my $fileno=0;
+
+my @panel_labels;
+my @panel_ones;
+my @panel_twos;
+my @panel_onevars;
+my @panel_twovars;
+my @panel_keys;
+my $panel_count;
+
+# pop the toplevels
+
+my $toplevel=new MainWindow(-class=>'AnalyzerGraph');
+my $Xname=$toplevel->Class;
+$toplevel->optionAdd("$Xname.geometry", "800x600",20);
+
+my $geometry=$toplevel->optionGet('geometry','');
+$geometry=~/^(\d+)x(\d+)/;
+
+$toplevel->configure(-width=>$1);
+$toplevel->configure(-height=>$2);
+
+
+
+
+
+$toplevel->optionAdd("$Xname.background", "#4fc627",20);
+$toplevel->optionAdd("$Xname*highlightBackground", "#80c0d3",20);
+$toplevel->optionAdd("$Xname.Panel.background", "#4fc627",20);
+$toplevel->optionAdd("$Xname.Panel.foreground", "#d0d0d0",20);
+$toplevel->optionAdd("$Xname.Panel.font",
+ '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20);
+$toplevel->optionAdd("$Xname*Statuslabel.font",
+ '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20);
+$toplevel->optionAdd("$Xname*Statuslabel.foreground", "#606060");
+$toplevel->optionAdd("$Xname*Status.font",
+ '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20);
+
+$toplevel->optionAdd("$Xname*AlertDetail.font",
+ '-*-helvetica-medium-r-*-*-10-*-*-*-*-*-*-*',20);
+
+
+$toplevel->optionAdd("$Xname*background", "#d0d0d0",20);
+$toplevel->optionAdd("$Xname*foreground", '#000000',20);
+
+$toplevel->optionAdd("$Xname*Button*background", "#f0d0b0",20);
+$toplevel->optionAdd("$Xname*Button*foreground", '#000000',20);
+$toplevel->optionAdd("$Xname*Button*borderWidth", '2',20);
+$toplevel->optionAdd("$Xname*Button*relief", 'groove',20);
+$toplevel->optionAdd("$Xname*Button*padY", 1,20);
+
+#$toplevel->optionAdd("$Xname*Scale*background", "#f0d0b0",20);
+$toplevel->optionAdd("$Xname*Scale*foreground", '#000000',20);
+$toplevel->optionAdd("$Xname*Scale*borderWidth", '1',20);
+#$toplevel->optionAdd("$Xname*Scale*relief", 'groove',20);
+$toplevel->optionAdd("$Xname*Scale*padY", 1,20);
+
+$toplevel->optionAdd("$Xname*Checkbutton*background", "#f0d0b0",20);
+$toplevel->optionAdd("$Xname*Checkbutton*foreground", '#000000',20);
+$toplevel->optionAdd("$Xname*Checkbutton*borderWidth", '2',20);
+$toplevel->optionAdd("$Xname*Checkbutton*relief", 'groove',20);
+
+$toplevel->optionAdd("$Xname*activeBackground", "#ffffff",20);
+$toplevel->optionAdd("$Xname*activeForeground", '#0000a0',20);
+$toplevel->optionAdd("$Xname*borderWidth", 0,20);
+$toplevel->optionAdd("$Xname*relief", 'flat',20);
+$toplevel->optionAdd("$Xname*activeBorderWidth", 1,20);
+$toplevel->optionAdd("$Xname*highlightThickness", 0,20);
+$toplevel->optionAdd("$Xname*padX", 2,20);
+$toplevel->optionAdd("$Xname*padY", 2,20);
+$toplevel->optionAdd("$Xname*font",
+ '-*-helvetica-bold-r-*-*-12-*-*-*-*-*-*-*',20);
+$toplevel->optionAdd("$Xname*Entry.font",
+ '-*-helvetica-medium-r-*-*-12-*-*-*-*-*-*-*',20);
+$toplevel->optionAdd("$Xname*Exit.font",
+ '-*-helvetica-bold-r-*-*-10-*-*-*-*-*-*-*',20);
+$toplevel->optionAdd("$Xname*Exit.relief", 'groove',20);
+$toplevel->optionAdd("$Xname*Exit.padX", 1,20);
+$toplevel->optionAdd("$Xname*Exit.padY", 1,20);
+$toplevel->optionAdd("$Xname*Exit.borderWidth", 2,20);
+$toplevel->optionAdd("$Xname*Exit*background", "#a0a0a0",20);
+$toplevel->optionAdd("$Xname*Exit*disabledForeground", "#ffffff",20);
+
+#$toplevel->optionAdd("$Xname*Canvas.background", "#c0c0c0",20);
+
+$toplevel->optionAdd("$Xname*Entry.background", "#ffffff",20);
+$toplevel->optionAdd("$Xname*Entry.disabledForeground", "#c0c0c0",20);
+$toplevel->optionAdd("$Xname*Entry.relief", "sunken",20);
+$toplevel->optionAdd("$Xname*Entry.borderWidth", 1,20);
+
+$toplevel->optionAdd("$Xname*Field.background", "#ffffff",20);
+$toplevel->optionAdd("$Xname*Field.disabledForeground", "#c0c0c0",20);
+$toplevel->optionAdd("$Xname*Field.relief", "flat",20);
+$toplevel->optionAdd("$Xname*Field.borderWidth", 1,20);
+
+$toplevel->optionAdd("$Xname*Label.disabledForeground", "#c0c0c0",20);
+$toplevel->optionAdd("$Xname*Label.borderWidth", 1,20);
+
+$toplevel->configure(-background=>$toplevel->optionGet("background",""));
+
+#$toplevel->resizable(FALSE,FALSE);
+
+my $panel=new MainWindow(-class=>'AnalyzerPanel');
+my $X2name=$panel->Class;
+
+$panel->optionAdd("$X2name.background", "#353535",20);
+$panel->optionAdd("$X2name*highlightBackground", "#80c0d3",20);
+$panel->optionAdd("$X2name.Panel.background", "#353535",20);
+$panel->optionAdd("$X2name.Panel.foreground", "#4fc627",20);
+$panel->optionAdd("$X2name.Panel.font",
+ '-*-helvetica-bold-o-*-*-18-*-*-*-*-*-*-*',20);
+$panel->optionAdd("$X2name*Statuslabel.font",
+ '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20);
+$panel->optionAdd("$X2name*Statuslabel.foreground", "#4fc627",20);
+$panel->optionAdd("$X2name*Status.font",
+ '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20);
+
+$panel->optionAdd("$X2name*AlertDetail.font",
+ '-*-helvetica-medium-r-*-*-10-*-*-*-*-*-*-*',20);
+
+
+$panel->optionAdd("$X2name*background", "#d0d0d0",20);
+$panel->optionAdd("$X2name*foreground", '#000000',20);
+
+$panel->optionAdd("$X2name*Button*background", "#f0d0b0",20);
+$panel->optionAdd("$X2name*Button*foreground", '#000000',20);
+$panel->optionAdd("$X2name*Button*borderWidth", '2',20);
+$panel->optionAdd("$X2name*Button*relief", 'groove',20);
+$panel->optionAdd("$X2name*Button*padY", 1,20);
+
+$panel->optionAdd("$X2name*Checkbutton*background", "#f0d0b0",20);
+$panel->optionAdd("$X2name*Checkbutton*foreground", '#000000',20);
+$panel->optionAdd("$X2name*Checkbutton*borderWidth", '2',20);
+#$panel->optionAdd("$X2name*Checkbutton*padX", '0',20);
+#$panel->optionAdd("$X2name*Checkbutton*padY", '0',20);
+#$panel->optionAdd("$X2name*Checkbutton*relief", 'groove',20);
+
+$panel->optionAdd("$X2name*activeBackground", "#ffffff",20);
+$panel->optionAdd("$X2name*activeForeground", '#0000a0',20);
+$panel->optionAdd("$X2name*borderWidth", 0,20);
+$panel->optionAdd("$X2name*relief", 'flat',20);
+$panel->optionAdd("$X2name*activeBorderWidth", 1,20);
+$panel->optionAdd("$X2name*highlightThickness", 0,20);
+$panel->optionAdd("$X2name*padX", 2,20);
+$panel->optionAdd("$X2name*padY", 2,20);
+$panel->optionAdd("$X2name*font",
+ '-*-helvetica-bold-r-*-*-12-*-*-*-*-*-*-*',20);
+$panel->optionAdd("$X2name*Entry.font",
+ '-*-helvetica-medium-r-*-*-12-*-*-*-*-*-*-*',20);
+
+$panel->optionAdd("$X2name*Exit.font",
+ '-*-helvetica-bold-r-*-*-10-*-*-*-*-*-*-*',20);
+$panel->optionAdd("$X2name*Exit.relief", 'groove',20);
+$panel->optionAdd("$X2name*Exit.padX", 1,20);
+$panel->optionAdd("$X2name*Exit.padY", 1,20);
+$panel->optionAdd("$X2name*Exit.borderWidth", 2,20);
+$panel->optionAdd("$X2name*Exit*background", "#a0a0a0",20);
+$panel->optionAdd("$X2name*Exit*disabledForeground", "#ffffff",20);
+
+$panel->optionAdd("$X2name*Entry.background", "#ffffff",20);
+$panel->optionAdd("$X2name*Entry.disabledForeground", "#c0c0c0",20);
+$panel->optionAdd("$X2name*Entry.relief", "sunken",20);
+$panel->optionAdd("$X2name*Entry.borderWidth", 1,20);
+
+$panel->optionAdd("$X2name*Field.background", "#ffffff",20);
+$panel->optionAdd("$X2name*Field.disabledForeground", "#c0c0c0",20);
+$panel->optionAdd("$X2name*Field.relief", "flat",20);
+$panel->optionAdd("$X2name*Field.borderWidth", 1,20);
+
+$panel->optionAdd("$X2name*Label.disabledForeground", "#c0c0c0",20);
+$panel->optionAdd("$X2name*Label.borderWidth", 1,20);
+
+$panel->configure(-background=>$panel->optionGet("background",""));
+
+#$panel->resizable("FALSE","FALSE");
+
+my $panel_shell=$panel->Label(Name=>"shell",-borderwidth=>1,-relief=>'raised')->
+ place(-x=>10,-y=>36,-relwidth=>1.0,-relheight=>1.0,
+ -width=>-20,-height=>-46,-anchor=>'nw');
+
+my $panel_quit=$panel_shell->Button(-class=>"Exit",-text=>"quit",-command=>[sub{Shutdown()}])->
+ place(-x=>-1,-y=>-1,-relx=>1.0,-rely=>1.0,-anchor=>'se');
+
+$panel->Label(Name=>"logo text",-class=>"Panel",-text=>$version)->
+ place(-x=>5,-y=>5,-anchor=>'nw');
+
+
+my $graph_shell=$toplevel->Label(Name=>"shell",-borderwidth=>1,-relief=>'raised')->
+ place(-x=>10,-y=>36,-relwidth=>1.0,-relheight=>1.0,
+ -width=>-20,-height=>-46,-anchor=>'nw');
+
+my $graph_status=$toplevel->Label(Name=>"logo text",-class=>"Panel",-text=>"Starting up")->
+ place(-x=>5,-y=>5,-anchor=>'nw');
+
+
+my $panely=5;
+my $panel_rescan=$panel_shell->Button(-text=>"rescan",-command=>[sub{scan_directory()}])->
+ place(-x=>-5,-relx=>1.,-y=>$panely,-anchor=>'ne');
+$panely+=$panel_rescan->reqheight()+6;
+
+
+my$temp=$graph_shell->Button(-text=>"<<",
+ -command=>[sub{$fileno-=10;$fileno=$first_file if($fileno<$first_file);
+ load_graph();}])->
+ place(-x=>5,-y=>-5,-rely=>1.,-relwidth=>.2,-width=>-5,-anchor=>'sw');
+$graph_shell->Button(-text=>">>",
+ -command=>[sub{$fileno+=10;$fileno=$last_file if($fileno>$last_file);
+ load_graph();}])->
+ place(-x=>-5,-y=>-5,-relwidth=>.2,-rely=>1.,-width=>-5,-relx=>1.,-anchor=>'se');
+$graph_shell->Button(-text=>"<",
+ -command=>[sub{$fileno-=1;$fileno=$first_file if($fileno<$first_file);
+ load_graph();}])->
+ place(-x=>5,-y=>-5,-relwidth=>.3,-width=>-7,-rely=>1.,-relx=>.2,-anchor=>'sw');
+$graph_shell->Button(-text=>">",
+ -command=>[sub{$fileno+=1;$fileno=$last_file if($fileno>$last_file);
+ load_graph();}])->
+ place(-x=>-5,-y=>-5,-relwidth=>.3,-width=>-7,-rely=>1.,-relx=>.8,-anchor=>'se');
+my$graphy=-10-$temp->reqheight();
+my$graph_slider=$temp=$graph_shell->Scale(-bigincrement=>1,
+ -resolution=>1,
+ -showvalue=>'TRUE',-variable=>\$fileno,-orient=>'horizontal')->
+ place(-x=>5,-y=>$graphy,-relwidth=>1.,-rely=>1.,-width=>-10,-anchor=>'sw');
+$graphy-=$temp->reqheight()+5;
+
+my$onecrop;
+my$twocrop;
+
+my$oneresize=$temp=$graph_shell->Checkbutton(-text=>"rescale",-variable=>\$onecrop,
+ -command=>[sub{draw_graph();}])->
+ place(-x=>5,-y=>5,-anchor=>'nw');
+
+my$one=$graph_shell->Canvas()->
+ place(-relwidth=>1.,-width=>-10,-relheight=>.5,-height=>($graphy/2)-5-$temp->reqheight(),
+ -x=>5,-y=>5+$temp->reqheight,-anchor=>'nw');
+
+
+my$tworesize=$temp=$graph_shell->Checkbutton(-text=>"rescale",-variable=>\$twocrop,
+ -command=>[sub{draw_graph();}])->
+ place(-rely=>1.,-y=>5,-anchor=>'nw',-in=>$one);
+my$two=$graph_shell->Canvas()->
+ place(-relwidth=>1.,-relheight=>1.,-rely=>1.,-y=>5+$temp->reqheight(),-anchor=>'nw',-in=>$one);
+
+scan_directory();
+
+my%onestate;
+my%twostate;
+my @data;
+
+$onestate{"canvas"}=$one;
+$onestate{"vars"}=\@panel_onevars;
+$twostate{"canvas"}=$two;
+$twostate{"vars"}=\@panel_twovars;
+
+$graph_slider->configure(-command=>[sub{load_graph()}]);
+load_graph();
+$toplevel->bind('MainWindow','<Configure>',[sub{$toplevel->update();
+ draw_graph()}]);
+
+Tk::MainLoop();
+
+sub load_graph{
+
+ scan_directory()if(!defined($panel_count));
+
+ @data=undef;
+
+ for(my$i=0;$i<$panel_count;$i++){
+ my$filename=$panel_keys[$i]."_$fileno.m";
+ if(open F, "$filename"){
+ $data[$i]=[(<F>)];
+ close F;
+ }
+ }
+ draw_graph();
+}
+
+sub graphhelper{
+ my($graph)=@_;
+ my$count=0;
+ my@colors=("#ff0000","#00df00","#0000ff","#ffff00","#ff00ff","#00ffff","#ffffff",
+ "#9f0000","#007f00","#00009f","#8f8f00","#8f008f","#008f8f","#000000");
+
+ my$w=$graph->{"canvas"};
+ my$rescale=0;
+
+ Status("Plotting $fileno");
+ $w->delete('foo');
+ $w->delete('legend');
+ $w->delete('lines');
+
+ # count range
+ for(my$i=0;$i<$panel_count;$i++){
+ if($graph->{"vars"}->[$i]){
+ if(defined($data[$i])){
+ if(!defined($graph->{"minx"})){
+ $data[$i]->[0]=~m/^\s*(-?[0-9\.]*)[ ,]+(-?[0-9\.]*)/;
+ $graph->{"maxx"}=$1;
+ $graph->{"minx"}=$1;
+ $graph->{"maxy"}=$2;
+ $graph->{"miny"}=$2;
+ $rescale=1;
+ }
+
+ for(my$j=0;$j<=$#{$data[$i]};$j++){
+ $data[$i]->[$j]=~m/^\s*(-?[0-9\.]*)[ ,]+(-?[0-9\.]*)/;
+ $rescale=1 if($1>$graph->{"maxx"});
+ $rescale=1 if($1<$graph->{"minx"});
+ $rescale=1 if($2>$graph->{"maxy"});
+ $rescale=1 if($2<$graph->{"miny"});
+ $graph->{"maxx"}=$1 if($1>$graph->{"maxx"});
+ $graph->{"minx"}=$1 if($1<$graph->{"minx"});
+ $graph->{"maxy"}=$2 if($2>$graph->{"maxy"});
+ $graph->{"miny"}=$2 if($2<$graph->{"miny"});
+ }
+ }
+ $count++;
+ }
+ }
+
+ my$width=$w->width();
+ my$height=$w->height();
+
+ $rescale=1 if(!defined($graph->{"width"}) ||
+ $width!=$graph->{"width"} ||
+ $height!=$graph->{"height"});
+
+ $graph->{"width"}=$width;
+ $graph->{"height"}=$height;
+
+ if(defined($graph->{"maxx"})){
+ # draw axes, labels
+ # look for appropriate axis scales
+
+ if($rescale){
+
+ $w->delete('ylabel');
+ $w->delete('xlabel');
+ $w->delete('axes');
+
+ my$yscale=1.;
+ my$xscale=1.;
+ my$iyscale=1.;
+ my$ixscale=1.;
+ while(($graph->{"maxx"}-$graph->{"minx"})*$xscale>15){$xscale*=.1;$ixscale*=10.;}
+ while(($graph->{"maxy"}-$graph->{"miny"})*$yscale>15){$yscale*=.1;$iyscale*=10.;}
+
+ while(($graph->{"maxx"}-$graph->{"minx"})*$xscale<3){$xscale*=10.;$ixscale*=.1;}
+ while(($graph->{"maxy"}-$graph->{"miny"})*$yscale<3){$yscale*=10.;$iyscale*=.1;}
+
+ # how tall are the x axis labels?
+ $w->createText(-1,-1,-anchor=>'se',-tags=>['foo'],-text=>"0123456789.");
+ my($x1,$y1,$x2,$y2)=$w->bbox('foo');
+ $w->delete('foo');
+ my$maxlabelheight=$y2-$y1;
+ my$useabley=$height-$maxlabelheight-3;
+ my$pixelpery=$useabley/($graph->{"maxy"}-$graph->{"miny"});
+
+ # place y axis labels at proper spacing/height
+ my$lasty=-$maxlabelheight/2;
+ my$topyval=int($graph->{"maxy"}*$yscale+1.)*$iyscale;
+
+ for(my$i=0;;$i++){
+ my$yval= $topyval-$i*$iyscale;
+ my$y= ($graph->{"maxy"}-$yval)*$pixelpery;
+ last if($y>$useabley);
+ if($y-$maxlabelheight>=$lasty){
+ $w->createText(0,$y,-anchor=>'e',-tags=>['ylabel'],-text=>"$yval");
+ $lasty=$y;
+ }
+ }
+
+ # get the max ylabel width and place them at proper x
+ ($x1,$y1,$x2,$y2)=$w->bbox('ylabel');
+ my$maxylabelwidth=$x2-$x1;
+ $w->move('ylabel',$maxylabelwidth,0);
+
+ my$beginx=$maxylabelwidth+3;
+ my$useablex=$width-$beginx;
+
+ # draw basic axes
+ $w->createLine($beginx,0,$beginx,$useabley,$width,$useabley,
+ -tags=>['axes'],-width=>2);
+ # draw y tix
+ $lasty=-$maxlabelheight/2;
+ for(my$i=0;;$i++){
+ my$yval= $topyval-$i*$iyscale;
+ my$y= ($graph->{"maxy"}-$yval)*$pixelpery;
+ last if($y>$useabley);
+ if($yval==0){
+ $w->createLine($beginx,$y,$width,$y,
+ -tags=>['axes'],-width=>1);
+ }else{
+ if($y-$maxlabelheight>=$lasty){
+ $w->createLine($beginx,$y,$width,$y,
+ -tags=>['axes'],-width=>1,
+ -stipple=>'gray50');
+
+ $lasty=$y;
+ }
+ }
+ }
+
+ # place x axis labels at proper spacing
+ my$topxval=int($graph->{"maxx"}*$xscale+1.)*$ixscale;
+ my$pixelperx=$useablex/($graph->{"maxx"}-$graph->{"minx"});
+
+ for(my$i=0;;$i++){
+ my$xval= $topxval-$i*$ixscale;
+ my$x= $width-($graph->{"maxx"}-$xval)*$pixelperx;
+
+ last if($x<$beginx);
+ # bounding boxen are hard. place temp labels.
+ $w->createText(-1,-1,-anchor=>'e',-tags=>['foo'],-text=>"$xval");
+ }
+
+ ($x1,$y1,$x2,$y2)=$w->bbox('foo');
+ my$maxxlabelwidth=$x2-$x1;
+ $w->delete('foo');
+ my$lastx=$width;
+
+ for(my$i=0;;$i++){
+ my$xval= $topxval-$i*$ixscale;
+ my$x= $width-($graph->{"maxx"}-$xval)*$pixelperx;
+
+ last if($x-$maxxlabelwidth/2<0 || $x<$beginx);
+ if($xval==0 && $x<$width){
+ $w->createLine($x,0,$x,$useabley,-tags=>['axes'],-width=>1);
+ }
+
+ if($x+$maxxlabelwidth<=$lastx){
+ $w->createText($x,$height-1,-anchor=>'s',-tags=>['xlabel'],-text=>"$xval");
+ $w->createLine($x,0,$x,$useabley,-tags=>['axes'],-width=>1,-stipple=>"gray50");
+ $lastx=$x;
+ }
+ }
+ $graph->{"labelheight"}=$maxlabelheight;
+ $graph->{"xo"}=$beginx;
+ $graph->{"ppx"}=$pixelperx;
+ $graph->{"ppy"}=$pixelpery;
+ }
+
+ # plot the files
+ $count=0;
+ my$legendy=$graph->{"labelheight"}/2;
+ for(my$i=0;$i<$panel_count;$i++){
+ if($graph->{"vars"}->[$i]){
+ $count++; # count here for legend color selection stability
+ if(defined($data[$i])){
+ # place a legend placard;
+ my$color=$colors[($count-1)%($#colors+1)];
+ $w->createText($width,$legendy,-anchor=>'e',-tags=>['legend'],
+ -fill=>$color,-text=>$panel_keys[$i]);
+ $legendy+=$graph->{"labelheight"};
+
+ # plot the lines
+ my@pairs=map{if(/^\s*(-?[0-9\.]*)[ ,]+(-?[0-9\.]*)/){
+ (($1-$graph->{"minx"})*$graph->{"ppx"}+$graph->{"xo"},
+ (-$2+$graph->{"maxy"})*$graph->{"ppy"})}} (@{$data[$i]});
+
+ $w->createLine((@pairs),-fill=>$color,-tags=>['lines']);
+ }
+ }
+ }
+ }
+}
+
+sub draw_graph{
+
+ if($onecrop){
+ $onestate{"minx"}=undef;
+ $onestate{"miny"}=undef;
+ $onestate{"maxx"}=undef;
+ $onestate{"maxy"}=undef;
+ }
+ if($twocrop){
+ $twostate{"minx"}=undef;
+ $twostate{"miny"}=undef;
+ $twostate{"maxx"}=undef;
+ $twostate{"maxy"}=undef;
+ }
+
+ for(my$i=0;$i<$panel_count;$i++){
+ if($twostate{"vars"}->[$i]){
+
+ #re-place the canvases
+
+ $oneresize->place(-x=>5,-y=>5,-anchor=>'nw');
+
+ $one->place(-relwidth=>1.,-width=>-10,-relheight=>.5,
+ -height=>($graphy/2)-5-$oneresize->reqheight(),
+ -x=>5,-y=>5+$oneresize->reqheight,-anchor=>'nw');
+
+ $tworesize->place(-rely=>1.,-y=>5,-anchor=>'nw',-in=>$one);
+ $two->place(-relwidth=>1.,-relheight=>1.,-rely=>1.,
+ -y=>5+$tworesize->reqheight(),-anchor=>'nw',-in=>$one);
+
+ graphhelper(\%onestate);
+ graphhelper(\%twostate);
+ return;
+ }
+ }
+
+ $oneresize->place(-x=>5,-y=>5,-anchor=>'nw');
+
+ $one->place(-relwidth=>1.,-width=>-10,-relheight=>1.,
+ -height=>$graphy-5-$oneresize->reqheight(),
+ -x=>5,-y=>5+$oneresize->reqheight,-anchor=>'nw');
+
+ $tworesize->placeForget();
+ $two->placeForget();
+
+ graphhelper(\%onestate);
+}
+
+sub depopulate_panel{
+ my $win;
+ foreach $win (@panel_labels){
+ $win->destroy();
+ }
+ @panel_labels=();
+ foreach $win (@panel_ones){
+ $win->destroy();
+ }
+ @panel_ones=();
+ foreach $win (@panel_twos){
+ $win->destroy();
+ }
+ @panel_twos=();
+ @panel_keys=();
+}
+
+sub populate_panel{
+ my $localy=$panely;
+ my $key;
+ my $i=0;
+ foreach $key (sort (keys %bases)){
+ $panel_keys[$i]=$key;
+ if(!defined($panel_onevars[$i])){
+ $panel_onevars[$i]=0;
+ $panel_twovars[$i]=0;
+ }
+
+ my $temp=$panel_twos[$i]=$panel_shell->
+ Checkbutton(-variable=>\$panel_twovars[$i],-command=>['main::draw_graph'],-text=>'2')->
+ place(-y=>$localy,-x=>-5,-anchor=>"ne",-relx=>1.);
+ my $oney=$temp->reqheight();
+ my $onex=$temp->reqwidth()+15;
+
+ $temp=$panel_ones[$i]=$panel_shell->
+ Checkbutton(-variable=>\$panel_onevars[$i],-command=>['main::draw_graph'],-text=>'1')->
+ place(-y=>0,-x=>0,-anchor=>"ne",-in=>$temp,-bordermode=>'outside');
+ $oney=$temp->reqheight() if ($oney<$temp->reqheight());
+ $onex+=$temp->reqwidth();
+
+ $temp=$panel_labels[$i]=$panel_shell->Label(-text=>$key,-class=>'Field',-justify=>'left')->
+ place(-y=>$localy,-x=>5,-anchor=>"nw",-relwidth=>1.,-width=>-$onex,
+ -bordermode=>'outside');
+ $oney=$temp->reqheight() if ($oney<$temp->reqheight());
+
+ $localy+=$oney+2;
+ $i++;
+ }
+ $panel_count=$i;
+
+ $localy+=$panel_quit->reqheight()+50;
+ my $geometry=$panel->geometry();
+ $geometry=~/^(\d+)/;
+
+ $panel->configure(-height=>$localy);
+ $panel->configure(-width=>$1);
+}
+
+sub Shutdown{
+ Tk::exit();
+}
+
+sub Status{
+ my$text=shift @_;
+ $graph_status->configure(-text=>"$text");
+ $toplevel->update();
+}
+
+sub scan_directory{
+
+ %bases=();
+ my$count=0;
+
+ $first_file=undef;
+ $last_file=undef;
+
+ if(opendir(D,".")){
+ my$file;
+ while(defined($file=readdir(D))){
+ if($file=~m/^(\S*)_(\d+).m/){
+ $bases{"$1"}="0";
+ $first_file=$2 if(!defined($first_file) || $2<$first_file);
+ $last_file=$2 if(!defined($last_file) || $2>$last_file);
+ $count++;
+
+ Status("Reading... $count")if($count%117==0);
+ }
+ }
+ closedir(D);
+ }
+ Status("Done Reading: $count files");
+ depopulate_panel();
+ populate_panel();
+
+ $fileno=$first_file if($fileno<$first_file);
+ $fileno=$last_file if($fileno>$last_file);
+
+ $graph_slider->configure(-from=>$first_file,-to=>$last_file);
+
+}
+
+
+
+
+
diff --git a/examples/seeking_example.c b/examples/seeking_example.c
new file mode 100644
index 0000000..361bfb1
--- /dev/null
+++ b/examples/seeking_example.c
@@ -0,0 +1,259 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: illustrate seeking, and test it too
+ last mod: $Id: seeking_example.c 16329 2009-07-24 01:53:20Z xiphmont $
+
+ ********************************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "vorbis/codec.h"
+#include "vorbis/vorbisfile.h"
+
+#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
+# include <io.h>
+# include <fcntl.h>
+#endif
+
+void _verify(OggVorbis_File *ov,
+ ogg_int64_t val,ogg_int64_t pcmval,double timeval,
+ ogg_int64_t pcmlength,
+ char *bigassbuffer){
+ int j;
+ long bread;
+ char buffer[4096];
+ int dummy;
+ ogg_int64_t pos;
+
+ /* verify the raw position, the pcm position and position decode */
+ if(val!=-1 && ov_raw_tell(ov)<val){
+ fprintf(stderr,"raw position out of tolerance: requested %ld, got %ld\n",
+ (long)val,(long)ov_raw_tell(ov));
+ exit(1);
+ }
+ if(pcmval!=-1 && ov_pcm_tell(ov)>pcmval){
+ fprintf(stderr,"pcm position out of tolerance: requested %ld, got %ld\n",
+ (long)pcmval,(long)ov_pcm_tell(ov));
+ exit(1);
+ }
+ if(timeval!=-1 && ov_time_tell(ov)>timeval){
+ fprintf(stderr,"time position out of tolerance: requested %f, got %f\n",
+ timeval,ov_time_tell(ov));
+ exit(1);
+ }
+ pos=ov_pcm_tell(ov);
+ if(pos<0 || pos>pcmlength){
+ fprintf(stderr,"pcm position out of bounds: got %ld\n",(long)pos);
+ exit(1);
+ }
+ bread=ov_read(ov,buffer,4096,1,1,1,&dummy);
+ for(j=0;j<bread;j++){
+ if(buffer[j]!=bigassbuffer[j+pos*2]){
+ fprintf(stderr,"data position after seek doesn't match pcm position\n");
+
+ {
+ FILE *f=fopen("a.m","w");
+ for(j=0;j<bread;j++)fprintf(f,"%d\n",(int)buffer[j]);
+ fclose(f);
+ f=fopen("b.m","w");
+ for(j=0;j<bread;j++)fprintf(f,"%d\n",(int)bigassbuffer[j+pos*2]);
+ fclose(f);
+ }
+
+ exit(1);
+ }
+ }
+}
+
+int main(){
+ OggVorbis_File ov;
+ int i,ret;
+ ogg_int64_t pcmlength;
+ double timelength;
+ char *bigassbuffer;
+ int dummy;
+
+#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
+ _setmode( _fileno( stdin ), _O_BINARY );
+#endif
+
+
+ /* open the file/pipe on stdin */
+ if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
+ fprintf(stderr,"Could not open input as an OggVorbis file.\n\n");
+ exit(1);
+ }
+
+ if(ov_seekable(&ov)){
+
+ /* to simplify our own lives, we want to assume the whole file is
+ stereo. Verify this to avoid potentially mystifying users
+ (pissing them off is OK, just don't confuse them) */
+ for(i=0;i<ov.links;i++){
+ vorbis_info *vi=ov_info(&ov,i);
+ if(vi->channels!=2){
+ fprintf(stderr,"Sorry; right now seeking_test can only use Vorbis files\n"
+ "that are entirely stereo.\n\n");
+ exit(1);
+ }
+ }
+
+ /* because we want to do sample-level verification that the seek
+ does what it claimed, decode the entire file into memory */
+ pcmlength=ov_pcm_total(&ov,-1);
+ timelength=ov_time_total(&ov,-1);
+ bigassbuffer=malloc(pcmlength*2); /* w00t */
+ i=0;
+ while(i<pcmlength*2){
+ int ret=ov_read(&ov,bigassbuffer+i,pcmlength*2-i,1,1,1,&dummy);
+ if(ret<0){
+ fprintf(stderr,"Error reading file.\n");
+ exit(1);
+ }
+ if(ret){
+ i+=ret;
+ }else{
+ pcmlength=i/2;
+ }
+ fprintf(stderr,"\rloading.... [%ld left] ",
+ (long)(pcmlength*2-i));
+ }
+
+ {
+ ogg_int64_t length=ov.end;
+ fprintf(stderr,"\rtesting raw seeking to random places in %ld bytes....\n",
+ (long)length);
+
+ for(i=0;i<1000;i++){
+ ogg_int64_t val=(double)rand()/RAND_MAX*length;
+ fprintf(stderr,"\r\t%d [raw position %ld]... ",i,(long)val);
+ ret=ov_raw_seek(&ov,val);
+ if(ret<0){
+ fprintf(stderr,"seek failed: %d\n",ret);
+ exit(1);
+ }
+
+ _verify(&ov,val,-1,-1.,pcmlength,bigassbuffer);
+
+ }
+ }
+
+ fprintf(stderr,"\r");
+ {
+ fprintf(stderr,"testing pcm page seeking to random places in %ld samples....\n",
+ (long)pcmlength);
+
+ for(i=0;i<1000;i++){
+ ogg_int64_t val=(double)rand()/RAND_MAX*pcmlength;
+ fprintf(stderr,"\r\t%d [pcm position %ld]... ",i,(long)val);
+ ret=ov_pcm_seek_page(&ov,val);
+ if(ret<0){
+ fprintf(stderr,"seek failed: %d\n",ret);
+ exit(1);
+ }
+
+ _verify(&ov,-1,val,-1.,pcmlength,bigassbuffer);
+
+ }
+ }
+
+ fprintf(stderr,"\r");
+ {
+ fprintf(stderr,"testing pcm exact seeking to random places in %ld samples....\n",
+ (long)pcmlength);
+
+ for(i=0;i<1000;i++){
+ ogg_int64_t val=(double)rand()/RAND_MAX*pcmlength;
+ fprintf(stderr,"\r\t%d [pcm position %ld]... ",i,(long)val);
+ ret=ov_pcm_seek(&ov,val);
+ if(ret<0){
+ fprintf(stderr,"seek failed: %d\n",ret);
+ exit(1);
+ }
+ if(ov_pcm_tell(&ov)!=val){
+ fprintf(stderr,"Declared position didn't perfectly match request: %ld != %ld\n",
+ (long)val,(long)ov_pcm_tell(&ov));
+ exit(1);
+ }
+
+ _verify(&ov,-1,val,-1.,pcmlength,bigassbuffer);
+
+ }
+ }
+
+ fprintf(stderr,"\r");
+ {
+ fprintf(stderr,"testing time page seeking to random places in %f seconds....\n",
+ timelength);
+
+ for(i=0;i<1000;i++){
+ double val=(double)rand()/RAND_MAX*timelength;
+ fprintf(stderr,"\r\t%d [time position %f]... ",i,val);
+ ret=ov_time_seek_page(&ov,val);
+ if(ret<0){
+ fprintf(stderr,"seek failed: %d\n",ret);
+ exit(1);
+ }
+
+ _verify(&ov,-1,-1,val,pcmlength,bigassbuffer);
+
+ }
+ }
+
+ fprintf(stderr,"\r");
+ {
+ fprintf(stderr,"testing time exact seeking to random places in %f seconds....\n",
+ timelength);
+
+ for(i=0;i<1000;i++){
+ double val=(double)rand()/RAND_MAX*timelength;
+ fprintf(stderr,"\r\t%d [time position %f]... ",i,val);
+ ret=ov_time_seek(&ov,val);
+ if(ret<0){
+ fprintf(stderr,"seek failed: %d\n",ret);
+ exit(1);
+ }
+ if(ov_time_tell(&ov)<val-1 || ov_time_tell(&ov)>val+1){
+ fprintf(stderr,"Declared position didn't perfectly match request: %f != %f\n",
+ val,ov_time_tell(&ov));
+ exit(1);
+ }
+
+ _verify(&ov,-1,-1,val,pcmlength,bigassbuffer);
+
+ }
+ }
+
+ fprintf(stderr,"\r \nOK.\n\n");
+
+
+ }else{
+ fprintf(stderr,"Standard input was not seekable.\n");
+ }
+
+ ov_clear(&ov);
+ return 0;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/examples/vorbisfile_example.c b/examples/vorbisfile_example.c
new file mode 100644
index 0000000..a32f248
--- /dev/null
+++ b/examples/vorbisfile_example.c
@@ -0,0 +1,92 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: simple example decoder using vorbisfile
+ last mod: $Id: vorbisfile_example.c 16328 2009-07-24 01:51:10Z xiphmont $
+
+ ********************************************************************/
+
+/* Takes a vorbis bitstream from stdin and writes raw stereo PCM to
+ stdout using vorbisfile. Using vorbisfile is much simpler than
+ dealing with libvorbis. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <vorbis/codec.h>
+#include <vorbis/vorbisfile.h>
+
+#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+char pcmout[4096]; /* take 4k out of the data segment, not the stack */
+
+int main(){
+ OggVorbis_File vf;
+ int eof=0;
+ int current_section;
+
+#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */
+ /* Beware the evil ifdef. We avoid these where we can, but this one we
+ cannot. Don't add any more, you'll probably go to hell if you do. */
+ _setmode( _fileno( stdin ), _O_BINARY );
+ _setmode( _fileno( stdout ), _O_BINARY );
+#endif
+
+ if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) {
+ fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
+ exit(1);
+ }
+
+ /* Throw the comments plus a few lines about the bitstream we're
+ decoding */
+ {
+ char **ptr=ov_comment(&vf,-1)->user_comments;
+ vorbis_info *vi=ov_info(&vf,-1);
+ while(*ptr){
+ fprintf(stderr,"%s\n",*ptr);
+ ++ptr;
+ }
+ fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
+ fprintf(stderr,"\nDecoded length: %ld samples\n",
+ (long)ov_pcm_total(&vf,-1));
+ fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
+ }
+
+ while(!eof){
+ long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,&current_section);
+ if (ret == 0) {
+ /* EOF */
+ eof=1;
+ } else if (ret < 0) {
+ if(ret==OV_EBADLINK){
+ fprintf(stderr,"Corrupt bitstream section! Exiting.\n");
+ exit(1);
+ }
+
+ /* some other error in the stream. Not a problem, just reporting it in
+ case we (the app) cares. In this case, we don't. */
+ } else {
+ /* we don't bother dealing with sample rate changes, etc, but
+ you'll have to*/
+ fwrite(pcmout,1,ret,stdout);
+ }
+ }
+
+ /* cleanup */
+ ov_clear(&vf);
+
+ fprintf(stderr,"Done.\n");
+ return(0);
+}