V4L/DVB (5345): ivtv driver for Conexant cx23416/cx23415 MPEG encoder/decoder
It took three core maintainers, over four years of work, eight new i2c
modules, eleven new V4L2 ioctls, three new DVB video ioctls, a Sliced
VBI API, a new MPEG encoder API, an enhanced DVB video MPEG decoding
API, major YUV/OSD contributions from Ian and John, web/wiki/svn/trac
support from Axel Thimm, (hardware) support from Hauppauge, support and
assistance from the v4l-dvb people and the many, many users of ivtv to
finally make it possible to merge this driver into the kernel.
Thank you all!
Signed-off-by: Kevin Thayer <nufan_wfk@yahoo.com>
Signed-off-by: Chris Kennedy <c@groovy.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: John P Harvey <john.p.harvey@btinternet.com>
Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/ivtv/ivtv-audio.c b/drivers/media/video/ivtv/ivtv-audio.c
new file mode 100644
index 0000000..d702b8b
--- /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]);
+}
+