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30e27d9623
found only many tv-cards. We currently use more ore less evil hacks (slow_msp_audio sysctl) to configure the various variants of these chips in order to have stereo autodetection work. Nevertheless, this doesn't always work even though it _should_, according to the specs. This is, for example, the case for some popular Hauppauge models sold sold in Germany. However, the Linux driver always worked for me and others. Looking at the sourcecode you will find that the linux-driver uses a very much enhanced approach to program the various msp34xx chipset variants, which is also found in the specs for these chips. This is a port of the Linux MSP34xx code, written by Gerd Knorr <kraxel@bytesex.org>, who agreed to re-release his code under a BSD license for this port. A new config option "BKTR_NEW_MSP34XX_DRIVER" is added, which is required to enable the new driver. Otherwise the old code is used. The msp34xx.c file is diff-reduced to the linux-driver to make later modifications easier, thus it doesn't follow style(9) in most cases. Approved by: roger (committing this, no time to test/review), keichii (code review)
90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/* $FreeBSD$ */
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/*
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* This is part of the Driver for Video Capture Cards (Frame grabbers)
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* and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
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* chipset.
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* Copyright Roger Hardiman and Amancio Hasty.
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*
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* bktr_audio : This deals with controlling the audio on TV cards,
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* controlling the Audio Multiplexer (audio source selector).
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* controlling any MSP34xx stereo audio decoders.
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* controlling any DPL35xx dolby surroud sound audio decoders.
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* initialising TDA98xx audio devices.
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*
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*/
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/*
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* 1. Redistributions of source code must retain the
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* Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Amancio Hasty and
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* Roger Hardiman
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Select Audio source, and allow muting
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*/
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int set_audio( bktr_ptr_t bktr, int mode );
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void temp_mute( bktr_ptr_t bktr, int flag );
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/*
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* Initialise any MSP or TDA devices
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*/
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void init_audio_devices( bktr_ptr_t bktr );
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/*
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* MSP34xx Audio Chip functions.
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*/
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void msp_autodetect( bktr_ptr_t bktr );
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void msp_read_id( bktr_ptr_t bktr );
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#ifdef BKTR_NEW_MSP34XX_DRIVER
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int msp_attach(bktr_ptr_t bktr);
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int msp_detach(bktr_ptr_t bktr);
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void msp_wake_thread(bktr_ptr_t bktr);
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void msp_halt_thread(bktr_ptr_t bktr);
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#endif
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/*
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* DPL35xx Audio Chip functions.
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*/
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void dpl_autodetect( bktr_ptr_t bktr );
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void dpl_read_id( bktr_ptr_t bktr );
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/*
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* TDA98xx Audio Chip functions.
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*/
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void init_BTSC( bktr_ptr_t bktr );
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int set_BTSC( bktr_ptr_t bktr, int control );
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