diff options
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-audio.c')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-audio.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/media/video/ivtv/ivtv-audio.c b/drivers/media/video/ivtv/ivtv-audio.c new file mode 100644 index 00000000000..d702b8b539a --- /dev/null +++ b/drivers/media/video/ivtv/ivtv-audio.c @@ -0,0 +1,74 @@ +/* + Audio-related ivtv functions. + Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> + Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "ivtv-driver.h" +#include "ivtv-mailbox.h" +#include "ivtv-i2c.h" +#include "ivtv-gpio.h" +#include "ivtv-cards.h" +#include "ivtv-audio.h" +#include <media/msp3400.h> +#include <linux/videodev.h> + +/* Selects the audio input and output according to the current + settings. */ +int ivtv_audio_set_io(struct ivtv *itv) +{ + struct v4l2_routing route; + u32 audio_input; + int mux_input; + + /* Determine which input to use */ + if (test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { + audio_input = itv->card->radio_input.audio_input; + mux_input = itv->card->radio_input.muxer_input; + } else { + audio_input = itv->card->audio_inputs[itv->audio_input].audio_input; + mux_input = itv->card->audio_inputs[itv->audio_input].muxer_input; + } + + /* handle muxer chips */ + route.input = mux_input; + route.output = 0; + ivtv_i2c_hw(itv, itv->card->hw_muxer, VIDIOC_INT_S_AUDIO_ROUTING, &route); + + route.input = audio_input; + if (itv->card->hw_audio & IVTV_HW_MSP34XX) { + route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); + } + return ivtv_i2c_hw(itv, itv->card->hw_audio, VIDIOC_INT_S_AUDIO_ROUTING, &route); +} + +void ivtv_audio_set_route(struct ivtv *itv, struct v4l2_routing *route) +{ + ivtv_i2c_hw(itv, itv->card->hw_audio, VIDIOC_INT_S_AUDIO_ROUTING, route); +} + +void ivtv_audio_set_audio_clock_freq(struct ivtv *itv, u8 freq) +{ + static u32 freqs[3] = { 44100, 48000, 32000 }; + + /* The audio clock of the digitizer must match the codec sample + rate otherwise you get some very strange effects. */ + if (freq > 2) + return; + ivtv_call_i2c_clients(itv, VIDIOC_INT_AUDIO_CLOCK_FREQ, &freqs[freq]); +} + |