| /* |
| ** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| ** |
| ** 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 "config.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <math.h> |
| |
| #if (HAVE_SNDFILE) |
| |
| #include <samplerate.h> |
| #include <sndfile.h> |
| |
| #define DEFAULT_CONVERTER SRC_SINC_MEDIUM_QUALITY |
| |
| #define BUFFER_LEN 4096 /*-(1<<16)-*/ |
| |
| static void usage_exit (const char *progname) ; |
| static sf_count_t sample_rate_convert (SNDFILE *infile, SNDFILE *outfile, int converter, double src_ratio, int channels, double * gain) ; |
| static double apply_gain (float * data, long frames, int channels, double max, double gain) ; |
| |
| int |
| main (int argc, char *argv []) |
| { SNDFILE *infile, *outfile = NULL ; |
| SF_INFO sfinfo ; |
| |
| sf_count_t count ; |
| double src_ratio = -1.0, gain = 1.0 ; |
| int new_sample_rate = -1, k, converter, max_speed = SF_FALSE ; |
| |
| if (argc == 2 && strcmp (argv [1], "--version") == 0) |
| { char buffer [64], *cptr ; |
| |
| if ((cptr = strrchr (argv [0], '/')) != NULL) |
| argv [0] = cptr + 1 ; |
| if ((cptr = strrchr (argv [0], '\\')) != NULL) |
| argv [0] = cptr + 1 ; |
| |
| sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ; |
| |
| printf ("%s (%s,%s)\n", argv [0], src_get_version (), buffer) ; |
| exit (0) ; |
| } ; |
| |
| if (argc != 5 && argc != 7 && argc != 8) |
| usage_exit (argv [0]) ; |
| |
| /* Set default converter. */ |
| converter = DEFAULT_CONVERTER ; |
| |
| for (k = 1 ; k < argc - 2 ; k++) |
| { if (strcmp (argv [k], "--max-speed") == 0) |
| max_speed = SF_TRUE ; |
| else if (strcmp (argv [k], "-to") == 0) |
| { k ++ ; |
| new_sample_rate = atoi (argv [k]) ; |
| } |
| else if (strcmp (argv [k], "-by") == 0) |
| { k ++ ; |
| src_ratio = atof (argv [k]) ; |
| } |
| else if (strcmp (argv [k], "-c") == 0) |
| { k ++ ; |
| converter = atoi (argv [k]) ; |
| } |
| else |
| usage_exit (argv [0]) ; |
| } ; |
| |
| if (new_sample_rate <= 0 && src_ratio <= 0.0) |
| usage_exit (argv [0]) ; |
| |
| if (src_get_name (converter) == NULL) |
| { printf ("Error : bad converter number.\n") ; |
| usage_exit (argv [0]) ; |
| } ; |
| |
| if (strcmp (argv [argc - 2], argv [argc - 1]) == 0) |
| { printf ("Error : input and output file names are the same.\n") ; |
| exit (1) ; |
| } ; |
| |
| if ((infile = sf_open (argv [argc - 2], SFM_READ, &sfinfo)) == NULL) |
| { printf ("Error : Not able to open input file '%s'\n", argv [argc - 2]) ; |
| exit (1) ; |
| } ; |
| |
| printf ("Input File : %s\n", argv [argc - 2]) ; |
| printf ("Sample Rate : %d\n", sfinfo.samplerate) ; |
| printf ("Input Frames : %ld\n\n", (long) sfinfo.frames) ; |
| |
| if (new_sample_rate > 0) |
| { src_ratio = (1.0 * new_sample_rate) / sfinfo.samplerate ; |
| sfinfo.samplerate = new_sample_rate ; |
| } |
| else if (src_is_valid_ratio (src_ratio)) |
| sfinfo.samplerate = (int) floor (sfinfo.samplerate * src_ratio) ; |
| else |
| { printf ("Not able to determine new sample rate. Exiting.\n") ; |
| sf_close (infile) ; |
| exit (1) ; |
| } ; |
| |
| if (fabs (src_ratio - 1.0) < 1e-20) |
| { printf ("Target samplerate and input samplerate are the same. Exiting.\n") ; |
| sf_close (infile) ; |
| exit (0) ; |
| } ; |
| |
| printf ("SRC Ratio : %f\n", src_ratio) ; |
| printf ("Converter : %s\n\n", src_get_name (converter)) ; |
| |
| if (src_is_valid_ratio (src_ratio) == 0) |
| { printf ("Error : Sample rate change out of valid range.\n") ; |
| sf_close (infile) ; |
| exit (1) ; |
| } ; |
| |
| /* Delete the output file length to zero if already exists. */ |
| remove (argv [argc - 1]) ; |
| |
| printf ("Output file : %s\n", argv [argc - 1]) ; |
| printf ("Sample Rate : %d\n", sfinfo.samplerate) ; |
| |
| do |
| { sf_close (outfile) ; |
| |
| if ((outfile = sf_open (argv [argc - 1], SFM_WRITE, &sfinfo)) == NULL) |
| { printf ("Error : Not able to open output file '%s'\n", argv [argc - 1]) ; |
| sf_close (infile) ; |
| exit (1) ; |
| } ; |
| |
| if (max_speed) |
| { /* This is mainly for the comparison program tests/src-evaluate.c */ |
| sf_command (outfile, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ; |
| } |
| else |
| { /* Update the file header after every write. */ |
| sf_command (outfile, SFC_SET_UPDATE_HEADER_AUTO, NULL, SF_TRUE) ; |
| } ; |
| |
| sf_command (outfile, SFC_SET_CLIPPING, NULL, SF_TRUE) ; |
| |
| count = sample_rate_convert (infile, outfile, converter, src_ratio, sfinfo.channels, &gain) ; |
| } |
| while (count < 0) ; |
| |
| printf ("Output Frames : %ld\n\n", (long) count) ; |
| |
| sf_close (infile) ; |
| sf_close (outfile) ; |
| |
| return 0 ; |
| } /* main */ |
| |
| /*============================================================================== |
| */ |
| |
| static sf_count_t |
| sample_rate_convert (SNDFILE *infile, SNDFILE *outfile, int converter, double src_ratio, int channels, double * gain) |
| { static float input [BUFFER_LEN] ; |
| static float output [BUFFER_LEN] ; |
| |
| SRC_STATE *src_state ; |
| SRC_DATA src_data ; |
| int error ; |
| double max = 0.0 ; |
| sf_count_t output_count = 0 ; |
| |
| sf_seek (infile, 0, SEEK_SET) ; |
| sf_seek (outfile, 0, SEEK_SET) ; |
| |
| /* Initialize the sample rate converter. */ |
| if ((src_state = src_new (converter, channels, &error)) == NULL) |
| { printf ("\n\nError : src_new() failed : %s.\n\n", src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| src_data.end_of_input = 0 ; /* Set this later. */ |
| |
| /* Start with zero to force load in while loop. */ |
| src_data.input_frames = 0 ; |
| src_data.data_in = input ; |
| |
| src_data.src_ratio = src_ratio ; |
| |
| src_data.data_out = output ; |
| src_data.output_frames = BUFFER_LEN /channels ; |
| |
| while (1) |
| { |
| /* If the input buffer is empty, refill it. */ |
| if (src_data.input_frames == 0) |
| { src_data.input_frames = sf_readf_float (infile, input, BUFFER_LEN / channels) ; |
| src_data.data_in = input ; |
| |
| /* The last read will not be a full buffer, so snd_of_input. */ |
| if (src_data.input_frames < BUFFER_LEN / channels) |
| src_data.end_of_input = SF_TRUE ; |
| } ; |
| |
| if ((error = src_process (src_state, &src_data))) |
| { printf ("\nError : %s\n", src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| /* Terminate if done. */ |
| if (src_data.end_of_input && src_data.output_frames_gen == 0) |
| break ; |
| |
| max = apply_gain (src_data.data_out, src_data.output_frames_gen, channels, max, *gain) ; |
| |
| /* Write output. */ |
| sf_writef_float (outfile, output, src_data.output_frames_gen) ; |
| output_count += src_data.output_frames_gen ; |
| |
| src_data.data_in += src_data.input_frames_used * channels ; |
| src_data.input_frames -= src_data.input_frames_used ; |
| } ; |
| |
| src_state = src_delete (src_state) ; |
| |
| if (max > 1.0) |
| { *gain = 1.0 / max ; |
| printf ("\nOutput has clipped. Restarting conversion to prevent clipping.\n\n") ; |
| return -1 ; |
| } ; |
| |
| return output_count ; |
| } /* sample_rate_convert */ |
| |
| static double |
| apply_gain (float * data, long frames, int channels, double max, double gain) |
| { |
| long k ; |
| |
| for (k = 0 ; k < frames * channels ; k++) |
| { data [k] *= gain ; |
| |
| if (fabs (data [k]) > max) |
| max = fabs (data [k]) ; |
| } ; |
| |
| return max ; |
| } /* apply_gain */ |
| |
| static void |
| usage_exit (const char *progname) |
| { char lsf_ver [128] ; |
| const char *cptr ; |
| int k ; |
| |
| if ((cptr = strrchr (progname, '/')) != NULL) |
| progname = cptr + 1 ; |
| |
| if ((cptr = strrchr (progname, '\\')) != NULL) |
| progname = cptr + 1 ; |
| |
| |
| sf_command (NULL, SFC_GET_LIB_VERSION, lsf_ver, sizeof (lsf_ver)) ; |
| |
| printf ("\n" |
| " A Sample Rate Converter using libsndfile for file I/O and Secret \n" |
| " Rabbit Code (aka libsamplerate) for performing the conversion.\n" |
| " It works on any file format supported by libsndfile with any \n" |
| " number of channels (limited only by host memory).\n" |
| "\n" |
| " %s\n" |
| " %s\n" |
| "\n" |
| " Usage : \n" |
| " %s -to <new sample rate> [-c <number>] <input file> <output file>\n" |
| " %s -by <amount> [-c <number>] <input file> <output file>\n" |
| "\n", src_get_version (), lsf_ver, progname, progname) ; |
| |
| puts ( |
| " The optional -c argument allows the converter type to be chosen from\n" |
| " the following list :" |
| "\n" |
| ) ; |
| |
| for (k = 0 ; (cptr = src_get_name (k)) != NULL ; k++) |
| printf (" %d : %s%s\n", k, cptr, k == DEFAULT_CONVERTER ? " (default)" : "") ; |
| |
| puts ("") ; |
| |
| exit (1) ; |
| } /* usage_exit */ |
| |
| /*============================================================================== |
| */ |
| |
| #else /* (HAVE_SNFILE == 0) */ |
| |
| /* Alternative main function when libsndfile is not available. */ |
| |
| int |
| main (void) |
| { puts ( |
| "\n" |
| "****************************************************************\n" |
| " This example program was compiled without libsndfile \n" |
| " (http://www.mega-nerd.com/libsndfile/).\n" |
| " It is therefore completely broken and non-functional.\n" |
| "****************************************************************\n" |
| "\n" |
| ) ; |
| |
| return 0 ; |
| } /* main */ |
| |
| #endif |
| |