/**
 * Set decoder parameters for MP3.
 *
 * \param	decoder Structure to store parameters.
 */
void setMp3(struct decoder_fn* decoder);

/**
 * Initialise MP3 decoder.
 *
 * \param	file	Location of MP3 file to play.
 * \return			0 on success, else failure.
 */
int initMp3(const char* file);

/**
 * Get sampling rate of MP3 file.
 *
 * \return	Sampling rate.
 */
uint32_t rateMp3(void);

/**
 * Get number of channels of MP3 file.
 *
 * \return	Number of channels for opened file.
 */
uint8_t channelMp3(void);

/**
 * Decode part of open MP3 file.
 *
 * \param buffer	Decoded output.
 * \return			Samples read for each channel.
 */
uint64_t decodeMp3(void* buffer);

/**
 * Free MP3 decoder.
 */
void exitMp3(void);