#include <resampler.hpp>

Collaboration diagram for audio_frame2_resampler:

Classes
class	impl

Public Member Functions
	audio_frame2_resampler ()

	audio_frame2_resampler (audio_frame2_resampler &&)

	~audio_frame2_resampler ()

int	align_bps (int orig)

audio_frame2_resampler &	operator= (audio_frame2_resampler &&)

std::tuple< bool, audio_frame2 >	resample (audio_frame2 &a, std::vector< audio_frame2::channel > &out, int new_sample_rate_num, int new_sample_rate_den)

Private Attributes
std::unique_ptr< impl >	m_impl

Detailed Description

Definition at line 47 of file resampler.hpp.

Constructor & Destructor Documentation

◆ audio_frame2_resampler() [1/2]

audio_frame2_resampler::audio_frame2_resampler ( )

Definition at line 355 of file resampler.cpp.

{
        enum { RESAMPLER_DEFAULT, RESAMPLER_SPEEX, RESAMPLER_SOXR } resampler_type = RESAMPLER_DEFAULT;
        const char *cfg_c = get_commandline_param("resampler");
        std::string_view sv = cfg_c ? cfg_c : "";
        int quality = DEFAULT_SPEEX_RESAMPLE_QUALITY;
        while (!sv.empty()) {
                const auto &tok = tokenize(sv, ':');
                if (tok == "speex") {
                        resampler_type = RESAMPLER_SPEEX;
                } else if (tok == "soxr") {
                        resampler_type = RESAMPLER_SOXR;
                } else if (tok.compare(0, "quality="sv.length(), "quality=") == 0) {
                        quality = stoi(string(tok.substr("quality="sv.length())));
                        if (quality < 0 || quality > 10) {
                                throw ug_runtime_error("Quality " + to_string(quality) + " out of range 0-10"s);
                        }
                } else {
                        throw ug_runtime_error("Unknown resampler option: "s + string(tok));
                }
        }
        switch (resampler_type) {
                case RESAMPLER_DEFAULT:
#ifdef HAVE_SPEEXDSP
                        m_impl = unique_ptr<audio_frame2_resampler::impl>(new speex_resampler(quality));
#elif defined HAVE_SOXR
                        m_impl = unique_ptr<audio_frame2_resampler::impl>(new soxr_resampler());
#endif
                        break;
                case RESAMPLER_SPEEX:
#ifdef HAVE_SPEEXDSP
                        m_impl = unique_ptr<audio_frame2_resampler::impl>(new speex_resampler(quality));
#else
                        throw ug_runtime_error("SpeexDSP not compiled in!");
#endif
                        break;
                case RESAMPLER_SOXR:
#if defined HAVE_SOXR
                        m_impl = unique_ptr<audio_frame2_resampler::impl>(new soxr_resampler());
                        break;
#else
                        throw ug_runtime_error("Soxr not compiled in!");
#endif
        }
}

References DEFAULT_SPEEX_RESAMPLE_QUALITY, get_commandline_param(), m_impl, and tokenize().

Here is the call graph for this function:

◆ ~audio_frame2_resampler()

audio_frame2_resampler::~audio_frame2_resampler ( )

default

◆ audio_frame2_resampler() [2/2]

audio_frame2_resampler::audio_frame2_resampler ( audio_frame2_resampler && )

default

Member Function Documentation

◆ align_bps()

int audio_frame2_resampler::align_bps ( int orig )

Returns: the orig (if supported) or nearest higher of resampler supported BPS (highest if orig is higher)

Definition at line 404 of file resampler.cpp.

                                              {
        if (!m_impl) {
                 LOG(LOG_LEVEL_ERROR) << "Audio frame resampler: cannot resample, Soxr/SpeexDSP was not compiled in!\n";
                 return 0;
        }
        const int *sup = m_impl->get_supported_bps();
        int last = 0;
        while (*sup != 0) {
                if (orig <= *sup) {
                        return *sup;
                }
                last = *sup++;
        }
        return last;
}

References LOG, LOG_LEVEL_ERROR, and m_impl.

Referenced by decode_audio_frame().

◆ operator=()

audio_frame2_resampler & audio_frame2_resampler::operator= ( audio_frame2_resampler && )

default

◆ resample()

tuple< bool, audio_frame2 > audio_frame2_resampler::resample	(	audio_frame2 &	a,
		std::vector< audio_frame2::channel > &	out,
		int	new_sample_rate_num,
		int	new_sample_rate_den )

Definition at line 76 of file resampler.cpp.

{
        if (!m_impl) {
                 LOG(LOG_LEVEL_ERROR) << "Audio frame resampler: cannot resample, Soxr/SpeexDSP was not compiled in!\n";
                 return { false, audio_frame2{} };
        }
        return m_impl->resample(a, out, new_sample_rate_num, new_sample_rate_den);
}