cannam@85: /* cannam@85: ** Copyright (C) 2005-2011 Erik de Castro Lopo cannam@85: ** cannam@85: ** This program is free software; you can redistribute it and/or modify cannam@85: ** it under the terms of the GNU General Public License as published by cannam@85: ** the Free Software Foundation; either version 2 of the License, or cannam@85: ** (at your option) any later version. cannam@85: ** cannam@85: ** This program is distributed in the hope that it will be useful, cannam@85: ** but WITHOUT ANY WARRANTY; without even the implied warranty of cannam@85: ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the cannam@85: ** GNU General Public License for more details. cannam@85: ** cannam@85: ** You should have received a copy of the GNU General Public License cannam@85: ** along with this program; if not, write to the Free Software cannam@85: ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. cannam@85: */ cannam@85: cannam@85: #include "config.h" cannam@85: cannam@85: #include cannam@85: #include cannam@85: #include cannam@85: #include cannam@85: #include cannam@85: cannam@85: #if (HAVE_SNDFILE) cannam@85: cannam@85: #include cannam@85: #include cannam@85: cannam@85: #define ARRAY_LEN(x) ((int) (sizeof (x) / sizeof ((x) [0]))) cannam@85: cannam@85: #define DEFAULT_CONVERTER SRC_SINC_MEDIUM_QUALITY cannam@85: cannam@85: #define BUFFER_LEN 1024 cannam@85: #define INPUT_STEP_SIZE 8 cannam@85: cannam@85: typedef struct cannam@85: { sf_count_t index ; cannam@85: double ratio ; cannam@85: } TIMEWARP_FACTOR ; cannam@85: cannam@85: static void usage_exit (const char *progname) ; cannam@85: static sf_count_t timewarp_convert (SNDFILE *infile, SNDFILE *outfile, int converter, int channels) ; cannam@85: cannam@85: int cannam@85: main (int argc, char *argv []) cannam@85: { SNDFILE *infile, *outfile ; cannam@85: SF_INFO sfinfo ; cannam@85: sf_count_t count ; cannam@85: cannam@85: if (argc != 3) cannam@85: usage_exit (argv [0]) ; cannam@85: cannam@85: putchar ('\n') ; cannam@85: printf ("Input File : %s\n", argv [argc - 2]) ; cannam@85: if ((infile = sf_open (argv [argc - 2], SFM_READ, &sfinfo)) == NULL) cannam@85: { printf ("Error : Not able to open input file '%s'\n", argv [argc - 2]) ; cannam@85: exit (1) ; cannam@85: } ; cannam@85: cannam@85: if (INPUT_STEP_SIZE * sfinfo.channels > BUFFER_LEN) cannam@85: { printf ("\n\nError : INPUT_STEP_SIZE * sfinfo.channels > BUFFER_LEN\n\n") ; cannam@85: exit (1) ; cannam@85: } ; cannam@85: cannam@85: cannam@85: /* Delete the output file length to zero if already exists. */ cannam@85: remove (argv [argc - 1]) ; cannam@85: cannam@85: if ((outfile = sf_open (argv [argc - 1], SFM_WRITE, &sfinfo)) == NULL) cannam@85: { printf ("Error : Not able to open output file '%s'\n", argv [argc - 1]) ; cannam@85: sf_close (infile) ; cannam@85: exit (1) ; cannam@85: } ; cannam@85: cannam@85: sf_command (outfile, SFC_SET_CLIPPING, NULL, SF_TRUE) ; cannam@85: cannam@85: printf ("Output file : %s\n", argv [argc - 1]) ; cannam@85: printf ("Converter : %s\n", src_get_name (DEFAULT_CONVERTER)) ; cannam@85: cannam@85: count = timewarp_convert (infile, outfile, DEFAULT_CONVERTER, sfinfo.channels) ; cannam@85: cannam@85: printf ("Output Frames : %ld\n\n", (long) count) ; cannam@85: cannam@85: sf_close (infile) ; cannam@85: sf_close (outfile) ; cannam@85: cannam@85: return 0 ; cannam@85: } /* main */ cannam@85: cannam@85: /*============================================================================== cannam@85: */ cannam@85: cannam@85: static TIMEWARP_FACTOR warp [] = cannam@85: { { 0 , 1.00000001 }, cannam@85: { 20000 , 1.01000000 }, cannam@85: { 20200 , 1.00000001 }, cannam@85: { 40000 , 1.20000000 }, cannam@85: { 40300 , 1.00000001 }, cannam@85: { 60000 , 1.10000000 }, cannam@85: { 60400 , 1.00000001 }, cannam@85: { 80000 , 1.50000000 }, cannam@85: { 81000 , 1.00000001 }, cannam@85: } ; cannam@85: cannam@85: static sf_count_t cannam@85: timewarp_convert (SNDFILE *infile, SNDFILE *outfile, int converter, int channels) cannam@85: { static float input [BUFFER_LEN] ; cannam@85: static float output [BUFFER_LEN] ; cannam@85: cannam@85: SRC_STATE *src_state ; cannam@85: SRC_DATA src_data ; cannam@85: int error, warp_index = 0 ; cannam@85: sf_count_t input_count = 0, output_count = 0 ; cannam@85: cannam@85: sf_seek (infile, 0, SEEK_SET) ; cannam@85: sf_seek (outfile, 0, SEEK_SET) ; cannam@85: cannam@85: /* Initialize the sample rate converter. */ cannam@85: if ((src_state = src_new (converter, channels, &error)) == NULL) cannam@85: { printf ("\n\nError : src_new() failed : %s.\n\n", src_strerror (error)) ; cannam@85: exit (1) ; cannam@85: } ; cannam@85: cannam@85: src_data.end_of_input = 0 ; /* Set this later. */ cannam@85: cannam@85: /* Start with zero to force load in while loop. */ cannam@85: src_data.input_frames = 0 ; cannam@85: src_data.data_in = input ; cannam@85: cannam@85: if (warp [0].index > 0) cannam@85: src_data.src_ratio = 1.0 ; cannam@85: else cannam@85: { src_data.src_ratio = warp [0].ratio ; cannam@85: warp_index ++ ; cannam@85: } ; cannam@85: cannam@85: src_data.data_out = output ; cannam@85: src_data.output_frames = BUFFER_LEN /channels ; cannam@85: cannam@85: while (1) cannam@85: { cannam@85: if (warp_index < ARRAY_LEN (warp) - 1 && input_count >= warp [warp_index].index) cannam@85: { src_data.src_ratio = warp [warp_index].ratio ; cannam@85: warp_index ++ ; cannam@85: } ; cannam@85: cannam@85: /* If the input buffer is empty, refill it. */ cannam@85: if (src_data.input_frames == 0) cannam@85: { src_data.input_frames = sf_readf_float (infile, input, INPUT_STEP_SIZE) ; cannam@85: input_count += src_data.input_frames ; cannam@85: src_data.data_in = input ; cannam@85: cannam@85: /* The last read will not be a full buffer, so snd_of_input. */ cannam@85: if (src_data.input_frames < INPUT_STEP_SIZE) cannam@85: src_data.end_of_input = SF_TRUE ; cannam@85: } ; cannam@85: cannam@85: /* Process current block. */ cannam@85: if ((error = src_process (src_state, &src_data))) cannam@85: { printf ("\nError : %s\n", src_strerror (error)) ; cannam@85: exit (1) ; cannam@85: } ; cannam@85: cannam@85: /* Terminate if done. */ cannam@85: if (src_data.end_of_input && src_data.output_frames_gen == 0) cannam@85: break ; cannam@85: cannam@85: /* Write output. */ cannam@85: sf_writef_float (outfile, output, src_data.output_frames_gen) ; cannam@85: output_count += src_data.output_frames_gen ; cannam@85: cannam@85: src_data.data_in += src_data.input_frames_used * channels ; cannam@85: src_data.input_frames -= src_data.input_frames_used ; cannam@85: } ; cannam@85: cannam@85: src_state = src_delete (src_state) ; cannam@85: cannam@85: return output_count ; cannam@85: } /* timewarp_convert */ cannam@85: cannam@85: /*------------------------------------------------------------------------------ cannam@85: */ cannam@85: cannam@85: static void cannam@85: usage_exit (const char *progname) cannam@85: { const char *cptr ; cannam@85: cannam@85: if ((cptr = strrchr (progname, '/')) != NULL) cannam@85: progname = cptr + 1 ; cannam@85: cannam@85: if ((cptr = strrchr (progname, '\\')) != NULL) cannam@85: progname = cptr + 1 ; cannam@85: cannam@85: printf ("\n" cannam@85: " A program demonstrating the time warping capabilities of libsamplerate." cannam@85: " It uses libsndfile for file I/O and Secret Rabbit Code (aka libsamplerate)" cannam@85: " for performing the warping.\n" cannam@85: " It works on any file format supported by libsndfile with any \n" cannam@85: " number of channels (limited only by host memory).\n" cannam@85: "\n" cannam@85: " The warping is dependant on a table hard code into the source code.\n" cannam@85: "\n" cannam@85: " libsamplerate version : %s\n" cannam@85: "\n" cannam@85: " Usage : \n" cannam@85: " %s \n" cannam@85: "\n", src_get_version (), progname) ; cannam@85: cannam@85: puts ("") ; cannam@85: cannam@85: exit (1) ; cannam@85: } /* usage_exit */ cannam@85: cannam@85: /*============================================================================== cannam@85: */ cannam@85: cannam@85: #else /* (HAVE_SNFILE == 0) */ cannam@85: cannam@85: /* Alternative main function when libsndfile is not available. */ cannam@85: cannam@85: int cannam@85: main (void) cannam@85: { puts ( cannam@85: "\n" cannam@85: "****************************************************************\n" cannam@85: " This example program was compiled without libsndfile \n" cannam@85: " (http://www.mega-nerd.com/libsndfile/).\n" cannam@85: " It is therefore completely broken and non-functional.\n" cannam@85: "****************************************************************\n" cannam@85: "\n" cannam@85: ) ; cannam@85: cannam@85: return 0 ; cannam@85: } /* main */ cannam@85: cannam@85: #endif cannam@85: