snd_substream 70 drivers/media/usb/usbtv/usbtv-audio.c chip->snd_substream = substream; snd_substream 125 drivers/media/usb/usbtv/usbtv-audio.c struct snd_pcm_substream *substream = chip->snd_substream; snd_substream 121 drivers/media/usb/usbtv/usbtv.h struct snd_pcm_substream *snd_substream;