impl ppb_audio_config_recommend_sample_frame_count
impl ppb_audio_config_recommend_sample_rate
impl ppb_audio_config_create_stereo_16_bit
impl ppb_audio_config_get_sample_rate
impl ppb_audio_config_get_sample_frame_count
impl ppb_url_util_dev_get_document_url
impl ppb_audio_create
impl ppb_audio_get_current_config
impl audio thread
check errors in ppb_url_util_dev_get_document_url
fill components in ppb_url_util_dev_get_document_url