NO_AUDIO option

[shapestoy] / src / music.c

#ifndef NO_AUDIO

#include <stdio.h>
#include <sys/stat.h>
#include "music.h"
#include "assfile.h"
#include "miniaudio/miniaudio.h"

static const char *fmtname(ma_format fmt);
static ma_result vopen(ma_vfs *vfs, const char *path, ma_uint32 mode, ma_vfs_file *fret);
static ma_result vclose(ma_vfs *vfs, ma_vfs_file fp);
static ma_result vread(ma_vfs *vfs, ma_vfs_file fp, void *dest, size_t sz, size_t *numread);
static ma_result vseek(ma_vfs *vfs, ma_vfs_file fp, ma_int64 offs, ma_seek_origin from);
static ma_result vtell(ma_vfs *vfs, ma_vfs_file fp, ma_int64 *pos);
static ma_result vinfo(ma_vfs *vfs, ma_vfs_file fp, ma_file_info *inf);

static int init_done;
static ma_engine engine;
static ma_sound sound;
static ma_resource_manager resman;
static ma_uint32 sample_rate;
static float volume;

static ma_vfs_callbacks vfs = {
        vopen, 0,
        vclose,
        vread, 0,
        vseek,
        vtell,
        vinfo
};

int init_music(void)
{
        ma_engine_config engcfg;
        ma_resource_manager_config rescfg;
        unsigned int flags;
        ma_format fmt;
        ma_uint32 nchan;

        rescfg = ma_resource_manager_config_init();
        rescfg.pVFS = &vfs;
        if(ma_resource_manager_init(&rescfg, &resman) != 0) {
                fprintf(stderr, "failed to initialize miniaudio resource manager\n");
                return -1;
        }

        engcfg = ma_engine_config_init();
        engcfg.pResourceManager = &resman;

        if(ma_engine_init(&engcfg, &engine) != 0) {
                fprintf(stderr, "failed to initialize miniaudio engine\n");
                return -1;
        }

        flags = MA_SOUND_FLAG_STREAM;
        if(ma_sound_init_from_file(&engine, "data/woodclick.wav", flags, 0, 0, &sound) != 0) {
                fprintf(stderr, "failed to load music\n");
                return -1;
        }
        ma_sound_get_data_format(&sound, &fmt, &nchan, &sample_rate, 0, 0);
        printf("loaded sound: %s %u.%03u khz, %u channels\n", fmtname(fmt),
                        (unsigned int)sample_rate / 1000, (unsigned int)sample_rate % 1000,
                        (unsigned int)nchan);

        init_done = 1;
        volume = 1.0f;
        return 0;
}

void destroy_music(void)
{
        if(init_done) {
                ma_sound_stop(&sound);
                ma_sound_uninit(&sound);
                ma_engine_uninit(&engine);
        }
        init_done = 0;
}

void play_music(void)
{
        if(init_done) {
                ma_sound_start(&sound);
        }
}

void stop_music(void)
{
        if(init_done) {
                ma_sound_stop(&sound);
        }
}

void seek_music(long tm)
{
        ma_uint64 frm;

        if(init_done) {
                if(tm < 0) tm = 0;
                frm = (ma_uint64)tm * (ma_uint64)sample_rate / 1000llu;
                ma_sound_seek_to_pcm_frame(&sound, frm);
        }
}

void set_music_volume(float vol)
{
        if(init_done) {
                volume = vol;
                ma_engine_set_volume(&engine, vol);
        }
}


static const char *fmtname(ma_format fmt)
{
        switch(fmt) {
        case ma_format_u8: return "8 bit";
        case ma_format_s16: return "16 bit";
        case ma_format_s24: return "24 bit";
        case ma_format_s32: return "32 bit";
        case ma_format_f32: return "float";
        default:
                return "unknown";
        }
}

static ma_result vopen(ma_vfs *vfs, const char *path, ma_uint32 mode, ma_vfs_file *fret)
{
        ass_file *fp;

        if(mode != MA_OPEN_MODE_READ) return -1;

        if(!(fp = ass_fopen(path, "rb"))) {
                return -1;
        }
        *fret = fp;
        return 0;
}

static ma_result vclose(ma_vfs *vfs, ma_vfs_file fp)
{
        ass_fclose(fp);
        return 0;
}

static ma_result vread(ma_vfs *vfs, ma_vfs_file fp, void *dest, size_t sz, size_t *numread)
{
        size_t res;

        res = ass_fread(dest, 1, sz, fp);
        if(numread) *numread = res;

        if(res != sz) {
                if(res == 0) return MA_AT_END;
        }
        return MA_SUCCESS;
}

static ma_result vseek(ma_vfs *vfs, ma_vfs_file fp, ma_int64 offs, ma_seek_origin org)
{
        int from;
        switch(org) {
        case ma_seek_origin_start:
                from = SEEK_SET;
                break;
        case ma_seek_origin_current:
                from = SEEK_CUR;
                break;
        case ma_seek_origin_end:
                from = SEEK_END;
                break;
        }
        return ass_fseek(fp, offs, from) == -1 ? -1 : 0;
}

static ma_result vtell(ma_vfs *vfs, ma_vfs_file fp, ma_int64 *pos)
{
        *pos = ass_ftell(fp);
        return 0;
}

static ma_result vinfo(ma_vfs *vfs, ma_vfs_file fp, ma_file_info *inf)
{
        int fd;
        struct stat st;

#ifdef _MSC_VER
        fd = _fileno(fp);
#else
        fd = fileno(fp);
#endif

        if(fstat(fd, &st) != 0) {
                return MA_ERROR;
        }
        inf->sizeInBytes = st.st_size;
        return MA_SUCCESS;
}

#else   /* NO_AUDIO */

int init_music(void)
{
        return 0;
}

void destroy_music(void)
{
}

void play_music(void)
{
}

void stop_music(void)
{
}

void seek_music(long tm)
{
}


void set_music_volume(float vol)
{
}

#endif