ref: 195e1bf4518685cdf635d8b58b3c9ccf66bad942
parent: 1b0c983925c301d3f0d00aad55fa0c29497bc4cc
author: Rob Sykes <robs@users.sourceforge.net>
date: Wed Oct 29 10:24:15 EDT 2014
New libsox example6: give explicit output attributes
--- a/ChangeLog
+++ b/ChangeLog
@@ -47,6 +47,7 @@
Other new features:
o New -p option for soxi to display sample precision. (Ulrich Klauer)
+ o New libsox example6: give explicit output attributes. (robs)
Internal improvements:
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -162,6 +162,8 @@
target_link_libraries(example4 lib${PROJECT_NAME} lpc10 ${optional_libs})add_executable(example5 example5.c)
target_link_libraries(example5 lib${PROJECT_NAME} lpc10 ${optional_libs})+add_executable(example6 example6.c)
+target_link_libraries(example6 lib${PROJECT_NAME} lpc10 ${optional_libs})find_program(LN ln)
if (LN)
add_custom_target(rec ALL ${LN} -sf sox rec DEPENDS sox)--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -35,7 +35,7 @@
#########################
bin_PROGRAMS = sox
-EXTRA_PROGRAMS = example0 example1 example2 example3 example4 example5 sox_sample_test
+EXTRA_PROGRAMS = example0 example1 example2 example3 example4 example5 example6 sox_sample_test
lib_LTLIBRARIES = libsox.la
include_HEADERS = sox.h
sox_SOURCES = sox.c
@@ -49,6 +49,7 @@
example3_SOURCES = example3.c
example4_SOURCES = example4.c
example5_SOURCES = example5.c
+example6_SOURCES = example6.c
sox_sample_test_SOURCES = sox_sample_test.c sox_sample_test.h
@@ -138,12 +139,13 @@
example3_LDADD = ${sox_LDADD} example4_LDADD = ${sox_LDADD} example5_LDADD = ${sox_LDADD}+example6_LDADD = ${sox_LDADD}EXTRA_DIST = monkey.wav optional-fmts.am \
CMakeLists.txt soxconfig.h.cmake \
tests.sh testall.sh tests.bat testall.bat test-comments
-all: sox$(EXEEXT) play$(EXEEXT) rec$(EXEEXT) soxi$(EXEEXT) sox_sample_test$(EXEEXT) example0$(EXEEXT) example1$(EXEEXT) example2$(EXEEXT) example3$(EXEEXT) example4$(EXEEXT) example5$(EXEEXT)
+all: sox$(EXEEXT) play$(EXEEXT) rec$(EXEEXT) soxi$(EXEEXT) sox_sample_test$(EXEEXT) example0$(EXEEXT) example1$(EXEEXT) example2$(EXEEXT) example3$(EXEEXT) example4$(EXEEXT) example5$(EXEEXT) example6$(EXEEXT)
play$(EXEEXT) rec$(EXEEXT) soxi$(EXEEXT): sox$(EXEEXT)
if test "$(PLAYRECLINKS)" = "yes"; then \
@@ -169,7 +171,7 @@
clean-local:
$(RM) play$(EXEEXT) rec$(EXEEXT) soxi$(EXEEXT)
$(RM) sox_sample_test$(EXEEXT)
- $(RM) example0$(EXEEXT) example1$(EXEEXT) example2$(EXEEXT) example3$(EXEEXT) example4$(EXEEXT) example5$(EXEEXT)
+ $(RM) example0$(EXEEXT) example1$(EXEEXT) example2$(EXEEXT) example3$(EXEEXT) example4$(EXEEXT) example5$(EXEEXT) example6$(EXEEXT)
distclean-local:
@@ -183,6 +185,7 @@
$(example3_SOURCES) \
$(example4_SOURCES) \
$(example5_SOURCES) \
+ $(example6_SOURCES) \
$(sox_sample_test_SOURCES) \
$(libsox_la_SOURCES)
--- /dev/null
+++ b/src/example6.c
@@ -1,0 +1,128 @@
+/* Simple example of using SoX libraries
+ *
+ * Copyright (c) 2007-14 robs@users.sourceforge.net
+ *
+ * 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.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
+#undef NDEBUG /* Must undef above assert.h or other that might include it. */
+#endif
+
+#include "sox.h"
+#include "util.h"
+#include <stdio.h>
+#include <assert.h>
+
+/*
+ * Shows how to explicitly specify output file signal and encoding attributes.
+ *
+ * The example converts a given input file of any type to mono mu-law at 8kHz
+ * sampling-rate (providing that this is supported by the given output file
+ * type).
+ *
+ * For example:
+ *
+ * sox -r 16k -n input.wav synth 8 sin 0:8k sin 8k:0 gain -1
+ * ./example6 input.wav output.wav
+ * soxi input.wav output.wav
+ *
+ * gives:
+ *
+ * Input File : 'input.wav'
+ * Channels : 2
+ * Sample Rate : 16000
+ * Precision : 32-bit
+ * Duration : 00:00:08.00 = 128000 samples ~ 600 CDDA sectors
+ * File Size : 1.02M
+ * Bit Rate : 1.02M
+ * Sample Encoding: 32-bit Signed Integer PCM
+ *
+ * Input File : 'output.wav'
+ * Channels : 1
+ * Sample Rate : 8000
+ * Precision : 14-bit
+ * Duration : 00:00:08.00 = 64000 samples ~ 600 CDDA sectors
+ * File Size : 64.1k
+ * Bit Rate : 64.1k
+ * Sample Encoding: 8-bit u-law
+ */
+
+int main(int argc, char * argv[])
+{+ static sox_format_t * in, * out; /* input and output files */
+ sox_effects_chain_t * chain;
+ sox_effect_t * e;
+ char * args[10];
+ sox_signalinfo_t interm_signal; /* @ intermediate points in the chain. */
+ sox_encodinginfo_t out_encoding = {+ SOX_ENCODING_ULAW,
+ 8,
+ 0,
+ sox_option_default,
+ sox_option_default,
+ sox_option_default,
+ sox_false
+ };
+ sox_signalinfo_t out_signal = {+ 8000,
+ 1,
+ 0,
+ 0,
+ NULL
+ };
+
+ assert(argc == 3);
+ assert(sox_init() == SOX_SUCCESS);
+ assert(in = sox_open_read(argv[1], NULL, NULL, NULL));
+ assert(out = sox_open_write(argv[2], &out_signal, &out_encoding, NULL, NULL, NULL));
+
+ chain = sox_create_effects_chain(&in->encoding, &out->encoding);
+
+ interm_signal = in->signal; /* NB: deep copy */
+
+ e = sox_create_effect(sox_find_effect("input"));+ args[0] = (char *)in, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
+ assert(sox_add_effect(chain, e, &interm_signal, &in->signal) == SOX_SUCCESS);
+ free(e);
+
+ if (in->signal.rate != out->signal.rate) {+ e = sox_create_effect(sox_find_effect("rate"));+ assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
+ assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
+ free(e);
+ }
+
+ if (in->signal.channels != out->signal.channels) {+ e = sox_create_effect(sox_find_effect("channels"));+ assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
+ assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
+ free(e);
+ }
+
+ e = sox_create_effect(sox_find_effect("output"));+ args[0] = (char *)out, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
+ assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
+ free(e);
+
+ sox_flow_effects(chain, NULL, NULL);
+
+ sox_delete_effects_chain(chain);
+ sox_close(out);
+ sox_close(in);
+ sox_quit();
+
+ return 0;
+}