playback_control.cpp

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#include "foobar2000.h"

static double parseFraction(const char * fraction) {
    unsigned v = 0, d = 1;
    while(pfc::char_is_numeric( *fraction) ) {
        d *= 10;
        v *= 10;
        v += (unsigned) ( *fraction - '0' );
        ++fraction;
    }
    PFC_ASSERT( *fraction == 0 );
    return (double)v / (double)d;
}

static double parse_time(const char * time) {
    unsigned vTotal = 0, vCur = 0;
    for(;;) {
        char c = *time++;
        if (c == 0) return (double) (vTotal + vCur);
        else if (pfc::char_is_numeric( c ) ) {
            vCur = vCur * 10 + (unsigned)(c-'0');
        } else if (c == ':') {
            if (vCur >= 60) {PFC_ASSERT(!"Invalid input"); return 0; }
            vTotal += vCur; vCur = 0; vTotal *= 60;
        } else if (c == '.') {
            return (double) (vTotal + vCur) + parseFraction(time);
        } else {
            PFC_ASSERT(!"Invalid input"); return 0;
        }
    }
}

double playback_control::playback_get_length()
{
    double rv = 0;
    metadb_handle_ptr ptr;
    if (get_now_playing(ptr))
    {
        rv = ptr->get_length();
    }
    return rv;
}

double playback_control::playback_get_length_ex() {
    double rv = 0;
    metadb_handle_ptr ptr;
    if (get_now_playing(ptr))
    {
        rv = ptr->get_length();
        if (rv <= 0) {
            pfc::string8 temp;
            titleformat_object::ptr script;
            static_api_ptr_t<titleformat_compiler>()->compile_force(script, "[%length_ex%]");
            this->playback_format_title(NULL, temp, script, NULL, display_level_titles);
            if (temp.length() > 0) rv = parse_time(temp);
        }
    }
    return rv;
}