diff src/libsndfile-1.0.27/tests/compression_size_test.c @ 125:cd6cdf86811e

Current libsndfile source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libsndfile-1.0.27/tests/compression_size_test.c	Tue Oct 18 13:22:47 2016 +0100
@@ -0,0 +1,201 @@
+/*
+** Copyright (C) 2007-2016 Erik de Castro Lopo <[e-mail]>
+**
+** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <math.h>
+
+#include	<sndfile.h>
+
+#include	"utils.h"
+#include	"dft_cmp.h"
+
+#define	SAMPLE_RATE		16000
+#define	DATA_LENGTH		(SAMPLE_RATE)
+
+static float data_out [DATA_LENGTH] ;
+
+static inline float
+max_float (float a, float b)
+{	return a > b ? a : b ;
+} /* max_float */
+
+static void
+vorbis_test (void)
+{	static float float_data [DFT_DATA_LENGTH] ;
+	const char * filename = "vorbis_test.oga" ;
+	SNDFILE * file ;
+	SF_INFO sfinfo ;
+	float max_abs = 0.0 ;
+	unsigned k ;
+
+	print_test_name ("vorbis_test", filename) ;
+
+	/* Generate float data. */
+	gen_windowed_sine_float (float_data, ARRAY_LEN (float_data), 1.0) ;
+
+	/* Set up output file type. */
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.format = SF_FORMAT_OGG | SF_FORMAT_VORBIS ;
+	sfinfo.channels = 1 ;
+	sfinfo.samplerate = SAMPLE_RATE ;
+
+	/* Write the output file. */
+
+	/*	The Vorbis encoder has a bug on PowerPC and X86-64 with sample rates
+	**	<= 22050. Increasing the sample rate to 32000 avoids triggering it.
+	**	See https://trac.xiph.org/ticket/1229
+	*/
+	if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
+	{	const char * errstr ;
+
+		errstr = sf_strerror (NULL) ;
+		if (strstr (errstr, "Sample rate chosen is known to trigger a Vorbis") == NULL)
+		{	printf ("Line %d: sf_open (SFM_WRITE) failed : %s\n", __LINE__, errstr) ;
+			dump_log_buffer (NULL) ;
+			exit (1) ;
+			} ;
+
+		printf ("\n                                  Sample rate -> 32kHz    ") ;
+		sfinfo.samplerate = 32000 ;
+
+		file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+		} ;
+
+	test_write_float_or_die (file, 0, float_data, ARRAY_LEN (float_data), __LINE__) ;
+	sf_close (file) ;
+
+	memset (float_data, 0, sizeof (float_data)) ;
+
+	/* Read the file back in again. */
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+	test_read_float_or_die (file, 0, float_data, ARRAY_LEN (float_data), __LINE__) ;
+	sf_close (file) ;
+
+	for (k = 0 ; k < ARRAY_LEN (float_data) ; k ++)
+		max_abs = max_float (max_abs, fabs (float_data [k])) ;
+
+	exit_if_true (max_abs > 1.023,
+		"\n\nLine %d : max_abs %f should be < 1.023.\n\n", __LINE__, max_abs) ;
+
+	puts ("ok") ;
+	unlink (filename) ;
+} /* vorbis_test */
+
+static void
+compression_size_test (int format, const char * filename)
+{	/*
+	**	Encode two files, one at quality 0.3 and one at quality 0.5 and then
+	**	make sure that the quality 0.3 files is the smaller of the two.
+	*/
+	char q3_fname [64] ;
+	char q6_fname [64] ;
+	char test_name [64] ;
+
+	SNDFILE *q3_file, *q6_file ;
+	SF_INFO sfinfo ;
+	int q3_size, q6_size ;
+	double quality ;
+	int k ;
+
+	snprintf (q3_fname, sizeof (q3_fname), "q3_%s", filename) ;
+	snprintf (q6_fname, sizeof (q6_fname), "q6_%s", filename) ;
+
+	snprintf (test_name, sizeof (test_name), "q[36]_%s", filename) ;
+	print_test_name (__func__, test_name) ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	/* Set up output file type. */
+	sfinfo.format = format ;
+	sfinfo.channels = 1 ;
+	sfinfo.samplerate = SAMPLE_RATE ;
+
+	/* Write the output file. */
+	q3_file = test_open_file_or_die (q3_fname, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	q6_file = test_open_file_or_die (q6_fname, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+
+	quality = 0.3 ;
+	sf_command (q3_file, SFC_SET_VBR_ENCODING_QUALITY, &quality, sizeof (quality)) ;
+	quality = 0.6 ;
+	sf_command (q6_file, SFC_SET_VBR_ENCODING_QUALITY, &quality, sizeof (quality)) ;
+
+	for (k = 0 ; k < 5 ; k++)
+	{	gen_lowpass_signal_float (data_out, ARRAY_LEN (data_out)) ;
+		test_write_float_or_die (q3_file, 0, data_out, ARRAY_LEN (data_out), __LINE__) ;
+		test_write_float_or_die (q6_file, 0, data_out, ARRAY_LEN (data_out), __LINE__) ;
+		} ;
+
+	sf_close (q3_file) ;
+	sf_close (q6_file) ;
+
+	q3_size = file_length (q3_fname) ;
+	q6_size = file_length (q6_fname) ;
+
+	exit_if_true (q3_size >= q6_size,
+		"\n\nLine %d : q3 size (%d) >= q6 size (%d)\n\n", __LINE__, q3_size, q6_size) ;
+
+	puts ("ok") ;
+	unlink (q3_fname) ;
+	unlink (q6_fname) ;
+} /* compression_size_test */
+
+
+
+int
+main (int argc, char *argv [])
+{	int all_tests = 0, tests = 0 ;
+
+	if (argc != 2)
+	{	printf (
+			"Usage : %s <test>\n"
+			"    Where <test> is one of:\n"
+			"        vorbis - test Ogg/Vorbis\n"
+			"        flac   - test FLAC\n"
+			"        all    - perform all tests\n",
+			argv [0]) ;
+		exit (0) ;
+		} ;
+
+	if (! HAVE_EXTERNAL_XIPH_LIBS)
+	{	puts ("    No Ogg/Vorbis tests because Ogg/Vorbis support was not compiled in.") ;
+		return 0 ;
+	} ;
+
+	if (strcmp (argv [1], "all") == 0)
+		all_tests = 1 ;
+
+	if (all_tests || strcmp (argv [1], "vorbis") == 0)
+	{	vorbis_test () ;
+		compression_size_test (SF_FORMAT_OGG | SF_FORMAT_VORBIS, "vorbis.oga") ;
+		tests ++ ;
+		} ;
+
+	if (all_tests || strcmp (argv [1], "flac") == 0)
+	{	compression_size_test (SF_FORMAT_FLAC | SF_FORMAT_PCM_16, "pcm16.flac") ;
+		tests ++ ;
+		} ;
+
+	return 0 ;
+} /* main */