replaygain_info.cpp

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#include "foobar2000.h"

#ifdef _MSC_VER
#define RG_FPU() fpu_control_roundnearest bah;
#else
#define RG_FPU()
#endif

bool replaygain_info::g_format_gain(float p_value,char p_buffer[text_buffer_size])
{
    RG_FPU();
    if (p_value == gain_invalid)
    {
        p_buffer[0] = 0;
        return false;
    }
    else
    {
        pfc::float_to_string(p_buffer,text_buffer_size - 4,p_value,2,true);
        strcat(p_buffer," dB");
        return true;
    }
}

bool replaygain_info::g_format_peak(float p_value,char p_buffer[text_buffer_size])
{
    RG_FPU();
    if (p_value == peak_invalid)
    {
        p_buffer[0] = 0;
        return false;
    }
    else
    {
        pfc::float_to_string(p_buffer,text_buffer_size,p_value,6,false);
        return true;
    }
}

void replaygain_info::reset()
{
    m_album_gain = gain_invalid;
    m_track_gain = gain_invalid;
    m_album_peak = peak_invalid;
    m_track_peak = peak_invalid;
}

static const char meta_album_gain[] = "replaygain_album_gain", meta_album_peak[] = "replaygain_album_peak", meta_track_gain[] = "replaygain_track_gain", meta_track_peak[] = "replaygain_track_peak";

bool replaygain_info::g_is_meta_replaygain(const char * p_name,t_size p_name_len)
{
    return 
        stricmp_utf8_ex(p_name,p_name_len,meta_album_gain,~0) == 0 ||
        stricmp_utf8_ex(p_name,p_name_len,meta_album_peak,~0) == 0 ||
        stricmp_utf8_ex(p_name,p_name_len,meta_track_gain,~0) == 0 ||
        stricmp_utf8_ex(p_name,p_name_len,meta_track_peak,~0) == 0;
}

bool replaygain_info::set_from_meta_ex(const char * p_name,t_size p_name_len,const char * p_value,t_size p_value_len)
{
    RG_FPU();
    if (stricmp_utf8_ex(p_name,p_name_len,meta_album_gain,~0) == 0)
    {
        m_album_gain = (float)pfc::string_to_float(p_value,p_value_len);
        return true;
    }
    else if (stricmp_utf8_ex(p_name,p_name_len,meta_album_peak,~0) == 0)
    {
        m_album_peak = (float)pfc::string_to_float(p_value,p_value_len);
        if (m_album_peak < 0) m_album_peak = 0;
        return true;
    }
    else if (stricmp_utf8_ex(p_name,p_name_len,meta_track_gain,~0) == 0)
    {
        m_track_gain = (float)pfc::string_to_float(p_value,p_value_len);
        return true;
    }
    else if (stricmp_utf8_ex(p_name,p_name_len,meta_track_peak,~0) == 0)
    {
        m_track_peak = (float)pfc::string_to_float(p_value,p_value_len);
        if (m_track_peak < 0) m_track_peak = 0;
        return true;
    }
    else return false;
}


t_size replaygain_info::get_value_count()
{
    t_size ret = 0;
    if (is_album_gain_present()) ret++;
    if (is_album_peak_present()) ret++;
    if (is_track_gain_present()) ret++;
    if (is_track_peak_present()) ret++;
    return ret;
}

void replaygain_info::set_album_gain_text(const char * p_text,t_size p_text_len)
{
    RG_FPU();
    if (p_text != 0 && p_text_len > 0 && *p_text != 0)
        m_album_gain = (float)pfc::string_to_float(p_text,p_text_len);
    else
        remove_album_gain();
}

void replaygain_info::set_track_gain_text(const char * p_text,t_size p_text_len)
{
    RG_FPU();
    if (p_text != 0 && p_text_len > 0 && *p_text != 0)
        m_track_gain = (float)pfc::string_to_float(p_text,p_text_len);
    else
        remove_track_gain();
}

void replaygain_info::set_album_peak_text(const char * p_text,t_size p_text_len)
{
    RG_FPU();
    if (p_text != 0 && p_text_len > 0 && *p_text != 0)
        m_album_peak = (float)pfc::string_to_float(p_text,p_text_len);
    else
        remove_album_peak();
}

void replaygain_info::set_track_peak_text(const char * p_text,t_size p_text_len)
{
    RG_FPU();
    if (p_text != 0 && p_text_len > 0 && *p_text != 0)
        m_track_peak = (float)pfc::string_to_float(p_text,p_text_len);
    else
        remove_track_peak();
}

replaygain_info replaygain_info::g_merge(replaygain_info r1,replaygain_info r2)
{
    replaygain_info ret = r1;
    if (!ret.is_album_gain_present()) ret.m_album_gain = r2.m_album_gain;
    if (!ret.is_album_peak_present()) ret.m_album_peak = r2.m_album_peak;
    if (!ret.is_track_gain_present()) ret.m_track_gain = r2.m_track_gain;
    if (!ret.is_track_peak_present()) ret.m_track_peak = r2.m_track_peak;
    return ret;
}