/* Just printing out ID3 tags with plain data from libmpg123 and explicitly called conversion routine. */
#include "compat.h"
#include <mpg123.h>
#include "debug.h"
int test_whence(const char* path, int scan_before)
{
int err = MPG123_OK;
mpg123_handle* mh = NULL;
off_t length, pos;
mh = mpg123_new(NULL, &err );
if(mh == NULL) return -1;
err = mpg123_open(mh, path );
if(err != MPG123_OK) return -1;
if(scan_before) mpg123_scan(mh);
pos = mpg123_seek( mh, 0, SEEK_END);
if(pos < 0){ error1("seek failed: %s", mpg123_strerror(mh)); return -1; }
pos = mpg123_tell(mh);
length = mpg123_length(mh);
/* Later: Read samples and compare different whence values with identical seek positions. */
mpg123_close(mh);
mpg123_delete(mh);
fprintf(stdout, "length %"OFF_P" vs. pos %"OFF_P"\n", length, pos);
return (pos == length) ? 0 : -1;
}
void print_field(const char *name, mpg123_string *sb)
{
const unsigned char *sbp = (unsigned char*)sb->p;
enum mpg123_text_encoding enc;
mpg123_string printer;
mpg123_init_string(&printer);
printf("\n=== %s ===\n", name);
if(sb->fill == 0)
{
printf("Oh, empty. Totally.\n");
return;
}
enc = mpg123_enc_from_id3(sbp[0]);
printf("From encoding: %i (in ID3: %i)\n", enc, (int)sbp[0]) ;
if(mpg123_store_utf8(&printer, enc, sbp+1, sb->fill-1))
{
/* Not caring for multiple strings separated via null bytes here. */
printf("Value: %s\n", printer.p);
}
else error("Conversion failed!");
mpg123_free_string(&printer);
}
int main(int argc, char **argv)
{
int err;
int ret = 0;
mpg123_handle *mh;
mpg123_id3v2 *id3;
if(argc < 2)
{
printf("Gimme a MPEG file name...\n");
return 0;
}
mpg123_init();
mh = mpg123_new(NULL, &err);
if(err != MPG123_OK) goto badend;
mpg123_param(mh, MPG123_ADD_FLAGS, MPG123_PLAIN_ID3TEXT, 0.);
err = mpg123_open(mh, argv[1]);
if(err != MPG123_OK) goto badend;
err = mpg123_scan(mh);
if(err != MPG123_OK) goto badend;
err = mpg123_id3(mh, NULL, &id3);
if(err != MPG123_OK) goto badend;
if(id3 == NULL)
{
error("No ID3 data found.");
goto badend;
}
print_field("artist", id3->artist);
print_field("title", id3->title);
print_field("album", id3->album);
print_field("comment", id3->comment);
goto end;
badend:
ret = -1;
end:
mpg123_delete(mh);
mpg123_exit();
return ret;
}