controlport_stats.cpp

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#ifdef HAVE_CONFIG_H
#include "config.h"
#include "config_unix.h"
#include "config_win32.h"
#endif /* HAVE_CONFIG_H */
 
#include <memory>
#include <string_view>
 
#include "debug.h"
#include "module.h"
#include "control_socket.h"
#include "audio/audio_filter.h"
#include "audio/types.h"
#include "audio/utils.h"
#include "lib_common.h"
 
struct state_controlport_stats{
        state_controlport_stats(struct module *mod) : mod(MODULE_CLASS_DATA, mod, this)
        {
                control = (control_state *) (get_module(get_root_module(mod), "control"));
        }
 
        module_raii mod;
 
        control_state *control;
 
        int bps = 0;
        int ch_count = 0;
        int sample_rate = 0;
                
};
 
static void usage(){
        printf("controlport_stats:\n");
        printf("Reporting of audio volume via control port\n");
}
 
static af_result_code init(struct module *parent, const char *cfg, void **state){
        auto s = std::make_unique<state_controlport_stats>(parent);
 
        if(strcmp(cfg, "help") == 0){
                usage();
                return AF_HELP_SHOWN;
        }
 
        *state = s.release();
        return AF_OK;
};
 
static af_result_code configure(void *state,
                        int in_bps, int in_ch_count, int in_sample_rate)
{
        auto s = static_cast<state_controlport_stats *>(state);
 
        s->bps = in_bps;
        s->ch_count = in_ch_count;
        s->sample_rate = in_sample_rate;
 
        return AF_OK;
}
 
static void done(void *state){
        auto s = static_cast<state_controlport_stats *>(state);
 
        delete s;
}
 
static void get_configured(void *state,
                        int *bps, int *ch_count, int *sample_rate)
{
        auto s = static_cast<state_controlport_stats *>(state);
 
        if(bps) *bps = s->bps;
        if(ch_count) *ch_count = s->ch_count;
        if(sample_rate) *sample_rate = s->sample_rate;
}
 
static af_result_code filter(void *state, struct audio_frame **frame){
        auto s = static_cast<state_controlport_stats *>(state);
 
        auto f = *frame;
 
        if(f->bps != s->bps || f->ch_count != s->ch_count){
                if(configure(state, f->bps, f->ch_count, f->sample_rate) != AF_OK){
                        return AF_MISCONFIGURED;
                }
        }
 
        if(!control_stats_enabled(s->control))
                return AF_OK;
 
        std::string report = "ASEND";
        for(int i = 0; i < f->ch_count; i++){
                double rms, peak;
                rms = calculate_rms(f, i, &peak);
                double rms_dbfs0 = 20 * log(rms) / log(10);
                double peak_dbfs0 = 20 * log(peak) / log(10);
                report += " volrms" + std::to_string(i) + " " + std::to_string(rms_dbfs0);
                report += " volpeak" + std::to_string(i) + " " + std::to_string(peak_dbfs0);
        }
        control_report_stats(s->control, report.c_str());
 
        return AF_OK;
}
 
static const struct audio_filter_info audio_filter_controlport_stats = {
        .name = "controlport_stats",
        .init = init,
        .done = done,
        .configure = configure,
        .get_configured_in = get_configured,
        .get_configured_out = get_configured,
        .filter = filter,
};
 
REGISTER_MODULE(controlport_stats, &audio_filter_controlport_stats, LIBRARY_CLASS_AUDIO_FILTER, AUDIO_FILTER_ABI_VERSION);