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