Branching for libburn release 1.4.0
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trunk/test/dewav.c
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trunk/test/dewav.c
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/* dewav
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Demo of libburn extension libdax_audioxtr
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Audio track data extraction facility of libdax and libburn.
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Copyright (C) 2006 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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/* libdax_audioxtr is quite independent of libburn. It only needs
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the messaging facility libdax_msgs. So we got two build variations:
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*/
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#ifdef Dewav_without_libburN
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/* This build environment is standalone relying only on libdax components */
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#include "../libburn/libdax_msgs.h"
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struct libdax_msgs *libdax_messenger= NULL;
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/* The API for .wav extraction */
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#define LIBDAX_AUDIOXTR_H_PUBLIC 1
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#include "../libburn/libdax_audioxtr.h"
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#else /* Dewav_without_libburN */
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/* This build environment uses libdax_msgs and libdax_audioxtr via libburn */
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/* Thus the API header of libburn */
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#include "../libburn/libburn.h"
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#endif /* ! Dewav_without_libburN */
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int main(int argc, char **argv)
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{
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/* This program acts as filter from in_path to out_path */
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char *in_path= "", *out_path= "-";
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/* The read-and-extract object for use with in_path */
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struct libdax_audioxtr *xtr= NULL;
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/* The file descriptor eventually detached from xtr */
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int xtr_fd= -2;
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/* Default output is stdout */
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int out_fd= 1;
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/* Inquired source parameters */
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char *fmt, *fmt_info;
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int num_channels, sample_rate, bits_per_sample, msb_first;
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off_t data_size;
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/* Auxiliary variables */
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int ret, i, be_strict= 1, buf_count, detach_fd= 0, extract_all= 0;
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char buf[2048];
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if(argc < 2)
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goto help;
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for(i= 1; i<argc; i++) {
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if(strcmp(argv[i],"-o")==0) {
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if(i>=argc-1) {
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fprintf(stderr,"%s: option -o needs a file address as argument.\n",
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argv[0]);
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exit(1);
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}
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i++;
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out_path= argv[i];
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} else if(strcmp(argv[i],"--lax")==0) {
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be_strict= 0;
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} else if(strcmp(argv[i],"--strict")==0) {
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be_strict= 1;
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} else if(strcmp(argv[i],"--detach_fd")==0) {
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/* Test the dirty detach method. Always --extract_all */
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detach_fd= 1;
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} else if(strcmp(argv[i],"--extract_all")==0) {
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/* Dirty : read all available bytes regardless of data_size */
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extract_all= 1;
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} else if(strcmp(argv[i],"--help")==0) {
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help:;
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fprintf(stderr,
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"usage: %s [-o output_path|\"-\"] [--lax|--strict] [source_path|\"-\"]\n",
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argv[0]);
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exit(0);
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} else {
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if(in_path[0]!=0) {
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fprintf(stderr,"%s: only one input file is allowed.\n", argv[0]);
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exit(2);
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}
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in_path= argv[i];
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}
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}
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if(in_path[0] == 0)
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in_path= "-";
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/* Depending on wether this was built standalone or with full libburn :
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*/
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#ifdef Dewav_without_libburN
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/* Initialize and set up libdax messaging system */
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ret= libdax_msgs_new(&libdax_messenger,0);
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if(ret<=0) {
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fprintf(stderr,"Failed to create libdax_messenger object.\n");
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exit(3);
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}
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libdax_msgs_set_severities(libdax_messenger, LIBDAX_MSGS_SEV_NEVER,
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LIBDAX_MSGS_SEV_NOTE, "", 0);
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fprintf(stderr, "dewav on libdax\n");
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#else /* Dewav_without_libburN */
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/* Initialize libburn and set up its messaging system */
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if(burn_initialize() == 0) {
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fprintf(stderr,"Failed to initialize libburn.\n");
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exit(3);
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}
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/* Print messages of severity NOTE or more directly to stderr */
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burn_msgs_set_severities("NEVER", "NOTE", "");
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fprintf(stderr, "dewav on libburn\n");
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#endif /* ! Dewav_without_libburN */
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/* Open audio source and create extractor object */
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ret= libdax_audioxtr_new(&xtr, in_path, 0);
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if(ret<=0)
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exit(4);
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if(strcmp(out_path,"-")!=0) {
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out_fd= open(out_path, O_WRONLY | O_CREAT | O_TRUNC,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
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if(out_fd == -1) {
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fprintf(stderr, "Cannot open file: %s\n", out_path);
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fprintf(stderr, "Error reported: '%s' (%d)\n",strerror(errno), errno);
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exit(5);
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}
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}
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/* Obtain and print parameters of audio source */
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libdax_audioxtr_get_id(xtr, &fmt, &fmt_info,
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&num_channels, &sample_rate, &bits_per_sample, &msb_first, 0);
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fprintf(stderr, "Detected format: %s\n", fmt_info);
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libdax_audioxtr_get_size(xtr, &data_size, 0);
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fprintf(stderr, "Data size : %.f bytes\n", (double) data_size);
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if((strcmp(fmt,".wav")!=0 && strcmp(fmt,".au")!=0) ||
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num_channels!=2 || sample_rate!=44100 || bits_per_sample!=16) {
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fprintf(stderr,
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"%sAudio source parameters do not comply to cdrskin/README specs\n",
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(be_strict ? "" : "WARNING: "));
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if(be_strict)
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exit(6);
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}
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if(msb_first==0)
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fprintf(stderr,
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"NOTE: Extracted data to be written with cdrskin option -swab\n");
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if(detach_fd) {
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/* Take over fd from xtr */;
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ret= libdax_audioxtr_detach_fd(xtr, &xtr_fd, 0);
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if(ret<=0) {
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fprintf(stderr, "Cannot detach file descriptor from extractor\n");
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exit(8);
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}
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/* not needed any more */
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libdax_audioxtr_destroy(&xtr, 0);
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fprintf(stderr, "Note: detached fd and freed extractor object.\n");
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}
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/* Extract and put out raw audio data */;
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while(1) {
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if(detach_fd) {
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buf_count= read(xtr_fd, buf, sizeof(buf));
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if(buf_count==-1)
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fprintf(stderr,"Error while reading from detached fd\n(%d) '%s'\n",
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errno, strerror(errno));
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} else {
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buf_count= libdax_audioxtr_read(xtr, buf, sizeof(buf), !!extract_all);
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}
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if(buf_count < 0)
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exit(7);
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if(buf_count == 0)
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break;
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ret= write(out_fd, buf, buf_count);
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if(ret == -1) {
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fprintf(stderr, "Failed to write buffer of %d bytes to: %s\n",
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buf_count, out_path);
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fprintf(stderr, "Error reported: '%s' (%d)\n", strerror(errno), errno);
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exit(5);
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}
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}
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/* Shutdown */
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if(out_fd>2)
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close(out_fd);
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/* ( It is permissible to do this with xtr==NULL ) */
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libdax_audioxtr_destroy(&xtr, 0);
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#ifdef Dewav_without_libburN
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libdax_msgs_destroy(&libdax_messenger,0);
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#else /* Dewav_without_libburN */
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burn_finish();
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#endif /* ! Dewav_without_libburN */
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exit(0);
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}
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