| /* |
| ** Copyright (C) 2005-2011 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 ARRAY_LEN(x) ((int) (sizeof (x) / sizeof ((x) [0]))) |
| |
| #define DEFAULT_CONVERTER SRC_SINC_MEDIUM_QUALITY |
| |
| #define BUFFER_LEN 1024 |
| #define INPUT_STEP_SIZE 8 |
| |
| typedef struct |
| { sf_count_t index ; |
| double ratio ; |
| } TIMEWARP_FACTOR ; |
| |
| static void usage_exit (const char *progname) ; |
| static sf_count_t timewarp_convert (SNDFILE *infile, SNDFILE *outfile, int converter, int channels) ; |
| |
| int |
| main (int argc, char *argv []) |
| { SNDFILE *infile, *outfile ; |
| SF_INFO sfinfo ; |
| sf_count_t count ; |
| |
| if (argc != 3) |
| usage_exit (argv [0]) ; |
| |
| putchar ('\n') ; |
| printf ("Input File : %s\n", argv [argc - 2]) ; |
| 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) ; |
| } ; |
| |
| if (INPUT_STEP_SIZE * sfinfo.channels > BUFFER_LEN) |
| { printf ("\n\nError : INPUT_STEP_SIZE * sfinfo.channels > BUFFER_LEN\n\n") ; |
| exit (1) ; |
| } ; |
| |
| |
| /* Delete the output file length to zero if already exists. */ |
| remove (argv [argc - 1]) ; |
| |
| 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) ; |
| } ; |
| |
| sf_command (outfile, SFC_SET_CLIPPING, NULL, SF_TRUE) ; |
| |
| printf ("Output file : %s\n", argv [argc - 1]) ; |
| printf ("Converter : %s\n", src_get_name (DEFAULT_CONVERTER)) ; |
| |
| count = timewarp_convert (infile, outfile, DEFAULT_CONVERTER, sfinfo.channels) ; |
| |
| printf ("Output Frames : %ld\n\n", (long) count) ; |
| |
| sf_close (infile) ; |
| sf_close (outfile) ; |
| |
| return 0 ; |
| } /* main */ |
| |
| /*============================================================================== |
| */ |
| |
| static TIMEWARP_FACTOR warp [] = |
| { { 0 , 1.00000001 }, |
| { 20000 , 1.01000000 }, |
| { 20200 , 1.00000001 }, |
| { 40000 , 1.20000000 }, |
| { 40300 , 1.00000001 }, |
| { 60000 , 1.10000000 }, |
| { 60400 , 1.00000001 }, |
| { 80000 , 1.50000000 }, |
| { 81000 , 1.00000001 }, |
| } ; |
| |
| static sf_count_t |
| timewarp_convert (SNDFILE *infile, SNDFILE *outfile, int converter, int channels) |
| { static float input [BUFFER_LEN] ; |
| static float output [BUFFER_LEN] ; |
| |
| SRC_STATE *src_state ; |
| SRC_DATA src_data ; |
| int error, warp_index = 0 ; |
| sf_count_t input_count = 0, 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 ; |
| |
| if (warp [0].index > 0) |
| src_data.src_ratio = 1.0 ; |
| else |
| { src_data.src_ratio = warp [0].ratio ; |
| warp_index ++ ; |
| } ; |
| |
| src_data.data_out = output ; |
| src_data.output_frames = BUFFER_LEN /channels ; |
| |
| while (1) |
| { |
| if (warp_index < ARRAY_LEN (warp) - 1 && input_count >= warp [warp_index].index) |
| { src_data.src_ratio = warp [warp_index].ratio ; |
| warp_index ++ ; |
| } ; |
| |
| /* If the input buffer is empty, refill it. */ |
| if (src_data.input_frames == 0) |
| { src_data.input_frames = sf_readf_float (infile, input, INPUT_STEP_SIZE) ; |
| input_count += src_data.input_frames ; |
| src_data.data_in = input ; |
| |
| /* The last read will not be a full buffer, so snd_of_input. */ |
| if (src_data.input_frames < INPUT_STEP_SIZE) |
| src_data.end_of_input = SF_TRUE ; |
| } ; |
| |
| /* Process current block. */ |
| 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 ; |
| |
| /* 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) ; |
| |
| return output_count ; |
| } /* timewarp_convert */ |
| |
| /*------------------------------------------------------------------------------ |
| */ |
| |
| static void |
| usage_exit (const char *progname) |
| { const char *cptr ; |
| |
| if ((cptr = strrchr (progname, '/')) != NULL) |
| progname = cptr + 1 ; |
| |
| if ((cptr = strrchr (progname, '\\')) != NULL) |
| progname = cptr + 1 ; |
| |
| printf ("\n" |
| " A program demonstrating the time warping capabilities of libsamplerate." |
| " It uses libsndfile for file I/O and Secret Rabbit Code (aka libsamplerate)" |
| " for performing the warping.\n" |
| " It works on any file format supported by libsndfile with any \n" |
| " number of channels (limited only by host memory).\n" |
| "\n" |
| " The warping is dependant on a table hard code into the source code.\n" |
| "\n" |
| " libsamplerate version : %s\n" |
| "\n" |
| " Usage : \n" |
| " %s <input file> <output file>\n" |
| "\n", src_get_version (), progname) ; |
| |
| 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 |
| |