#include <alsa/asoundlib.h>
#include <alsa/conf.h>
#include <alsa/pcm.h>
#include <dlfcn.h>
#include <stdio.h>

snd_config_t *conf_copy;

static int snd_pcm_hook_testhook_hw_params(snd_pcm_hook_t *hook)
{
	const char *str;
        snd_config_t *h = snd_pcm_hook_get_private(hook);
	snd_config_t *s;
	snd_config_search(h, "hw", &s);
	snd_config_get_string(s, &str);
	fprintf(stderr, "testhook: hw_params, %s\n", str);
        return 0;
}

static int snd_pcm_hook_testhook_hw_free(snd_pcm_hook_t *hook)
{
	const char *str;
        snd_config_t *h = snd_pcm_hook_get_private(hook);
	snd_config_t *s;
	snd_config_search(h, "close", &s);
	snd_config_get_string(s, &str);
	fprintf(stderr, "testhook: hw_free, %s\n", str);
        return 0;
}

static int snd_pcm_hook_testhook_close(snd_pcm_hook_t *hook)
{
	fprintf(stderr, "testhook: close\n");
        return 0;
}

int _snd_pcm_hook_testhook_install(snd_pcm_t *pcm, snd_config_t *conf)
{
	int err;
        snd_pcm_hook_t *h_hw_params = NULL, *h_hw_free = NULL, *h_close = NULL;

	snd_config_copy(&conf_copy, conf);

//	dlopen("testhook.so", RTLD_NOW);

        err = snd_pcm_hook_add(&h_hw_params, pcm, SND_PCM_HOOK_TYPE_HW_PARAMS,
                               snd_pcm_hook_testhook_hw_params, conf_copy);
        if (err < 0)
                goto _err;
        err = snd_pcm_hook_add(&h_hw_free, pcm, SND_PCM_HOOK_TYPE_HW_FREE,
                               snd_pcm_hook_testhook_hw_free, conf_copy);
        if (err < 0)
                goto _err;
        err = snd_pcm_hook_add(&h_close, pcm, SND_PCM_HOOK_TYPE_CLOSE,
                               snd_pcm_hook_testhook_close, NULL);
	return 0;
 _err:
        if (h_hw_params)
                snd_pcm_hook_remove(h_hw_params);
        if (h_hw_free)
                snd_pcm_hook_remove(h_hw_free);
        if (h_close)
                snd_pcm_hook_remove(h_close);
        return err;
}

SND_DLSYM_BUILD_VERSION(_snd_pcm_hook_testhook_install, SND_PCM_DLSYM_VERSION);