From 2ec38064ddb961987792b476516640241cd5dbdf Mon Sep 17 00:00:00 2001 From: Erik de Castro Lopo Date: Fri, 23 Oct 2015 20:19:58 +1100 Subject: [PATCH] Add examples/sndfile-loopify.c --- examples/Makefile.am | 6 +- examples/sndfile-loopify.c | 182 +++++++++++++++++++++++++++++++++++++ 2 files changed, 187 insertions(+), 1 deletion(-) create mode 100644 examples/sndfile-loopify.c diff --git a/examples/Makefile.am b/examples/Makefile.am index da841fa2..2a905162 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -1,12 +1,16 @@ ## Process this file with automake to produce Makefile.in -noinst_PROGRAMS = make_sine sfprocess list_formats generate sndfilehandle sndfile-to-text +noinst_PROGRAMS = make_sine sfprocess list_formats generate sndfilehandle \ + sndfile-to-text sndfile-loopify AM_CPPFLAGS = -I$(top_srcdir)/src sndfile_to_text_SOURCES = sndfile-to-text.c sndfile_to_text_LDADD = $(top_builddir)/src/libsndfile.la +sndfile_loopify_SOURCES = sndfile-loopify.c +sndfile_loopify_LDADD = $(top_builddir)/src/libsndfile.la + make_sine_SOURCES = make_sine.c make_sine_LDADD = $(top_builddir)/src/libsndfile.la diff --git a/examples/sndfile-loopify.c b/examples/sndfile-loopify.c new file mode 100644 index 00000000..f0ceb6d5 --- /dev/null +++ b/examples/sndfile-loopify.c @@ -0,0 +1,182 @@ +/* +** Copyright (C) 1999-2015 Erik de Castro Lopo +** +** All rights reserved. +** +** Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the author nor the names of any contributors may be used +** to endorse or promote products derived from this software without +** specific prior written permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED +** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; +** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR +** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +/* +** A quick/rough hack to add SF_INSTRUMENT data to a file. It compiles, but +** no guarantees beyond that. Happy to receive patches to fix/improve it. +** +** Code for this was stolen from programs/sndfile-convert.c and related code. +*/ + +#include +#include +#include +#include + +#include + +#include "common.h" + +#define BUFFER_LEN (1 << 14) + + +typedef struct +{ char *infilename, *outfilename ; + SF_INFO infileinfo, outfileinfo ; +} OptionData ; + +const char * program_name (const char * argv0) ; +static void sfe_copy_data_int (SNDFILE *outfile, SNDFILE *infile, int channels) ; +static void add_instrument_data (SNDFILE *outfile, const SF_INFO * in_info) ; + +static void +usage_exit (const char *progname) +{ + printf ("\nUsage : %s \n", progname) ; + puts ("") ; + exit (1) ; +} /* usage_exit */ + +int +main (int argc, char * argv []) +{ const char *progname, *infilename, *outfilename ; + SNDFILE *infile = NULL, *outfile = NULL ; + SF_INFO in_sfinfo, out_sfinfo ; + + progname = program_name (argv [0]) ; + + if (argc < 3 || argc > 5) + usage_exit (progname) ; + + infilename = argv [argc-2] ; + outfilename = argv [argc-1] ; + + if (strcmp (infilename, outfilename) == 0) + { printf ("Error : Input and output filenames are the same.\n\n") ; + usage_exit (progname) ; + } ; + + if (strlen (infilename) > 1 && infilename [0] == '-') + { printf ("Error : Input filename (%s) looks like an option.\n\n", infilename) ; + usage_exit (progname) ; + } ; + + if (outfilename [0] == '-') + { printf ("Error : Output filename (%s) looks like an option.\n\n", outfilename) ; + usage_exit (progname) ; + } ; + + memset (&in_sfinfo, 0, sizeof (in_sfinfo)) ; + + if ((infile = sf_open (infilename, SFM_READ, &in_sfinfo)) == NULL) + { printf ("Not able to open input file %s.\n", infilename) ; + puts (sf_strerror (NULL)) ; + return 1 ; + } ; + + memcpy (&out_sfinfo, &in_sfinfo, sizeof (out_sfinfo)) ; + /* Open the output file. */ + if ((outfile = sf_open (outfilename, SFM_WRITE, &out_sfinfo)) == NULL) + { printf ("Not able to open output file %s : %s\n", outfilename, sf_strerror (NULL)) ; + return 1 ; + } ; + + /* Add the loop data */ + add_instrument_data (outfile, &in_sfinfo) ; + + /* Copy the audio data */ + sfe_copy_data_int (outfile, infile, in_sfinfo.channels) ; + + sf_close (infile) ; + sf_close (outfile) ; + + return 0 ; +} /* main */ + +const char * +program_name (const char * argv0) +{ const char * tmp ; + + tmp = strrchr (argv0, '/') ; + argv0 = tmp ? tmp + 1 : argv0 ; + + /* Remove leading libtool name mangling. */ + if (strstr (argv0, "lt-") == argv0) + return argv0 + 3 ; + + return argv0 ; +} /* program_name */ + +static void +sfe_copy_data_int (SNDFILE *outfile, SNDFILE *infile, int channels) +{ static int data [BUFFER_LEN] ; + int frames, readcount ; + + frames = BUFFER_LEN / channels ; + readcount = frames ; + + while (readcount > 0) + { readcount = sf_readf_int (infile, data, frames) ; + sf_writef_int (outfile, data, readcount) ; + } ; + + return ; +} /* sfe_copy_data_int */ + +static void +add_instrument_data (SNDFILE *file, const SF_INFO *info) +{ SF_INSTRUMENT instr ; + + memset (&instr, 0, sizeof (instr)) ; + + instr.gain = 1 ; + instr.basenote = 0 ; + instr.detune = 0 ; + instr.velocity_lo = 0 ; + instr.velocity_hi = 0 ; + instr.key_lo = 0 ; + instr.key_hi = 0 ; + instr.loop_count = 1 ; + + instr.loops [0].mode = SF_LOOP_FORWARD ; + instr.loops [0].start = 0 ; + instr.loops [0].end = info->frames ; + instr.loops [0].count = 0 ; + + if (sf_command (file, SFC_SET_INSTRUMENT, &instr, sizeof (instr)) == SF_FALSE) + { printf ("\n\nLine %d : sf_command (SFC_SET_INSTRUMENT) failed.\n\n", __LINE__) ; + exit (1) ; + } ; + + return ; +} /* add_instrument_data */ +