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| author | Ricardo Cerqueira <devnull@localhost> | 2006-01-29 23:27:06 +0100 |
|---|---|---|
| committer | Ricardo Cerqueira <devnull@localhost> | 2006-01-29 23:27:06 +0100 |
| commit | 7ce058312710e9ae449967998eb059d7f1661b0a (patch) | |
| tree | e372d0b8dbe649ecb202507a14e49a8199f51ae7 /linux/drivers/media | |
| parent | ce7401b487d18678f851abb06d51532fdf2b6094 (diff) | |
| download | mediapointer-dvb-s2-7ce058312710e9ae449967998eb059d7f1661b0a.tar.gz mediapointer-dvb-s2-7ce058312710e9ae449967998eb059d7f1661b0a.tar.bz2 | |
Fix NICAM buzz on analog sound
From: Marcin Rudowski <mar_rud@poczta.onet.pl>
Apparently, having the number of lines fixed at 4 reduces (or even kills)
the buzz found in NICAM stereo with analog sound.
Signed-off-by: Marcin Rudowski <mar_rud@poczta.onet.pl>
Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org>
Diffstat (limited to 'linux/drivers/media')
| -rw-r--r-- | linux/drivers/media/video/cx88/cx88-core.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/linux/drivers/media/video/cx88/cx88-core.c b/linux/drivers/media/video/cx88/cx88-core.c index 93186a4df..f4dfcae15 100644 --- a/linux/drivers/media/video/cx88/cx88-core.c +++ b/linux/drivers/media/video/cx88/cx88-core.c @@ -828,12 +828,14 @@ static int set_pll(struct cx88_core *core, int prescale, u32 ofreq) int cx88_start_audio_dma(struct cx88_core *core) { + /* constant 128 made buzz in analog Nicam-stereo for bigger fifo_size */ + int bpl = cx88_sram_channels[SRAM_CH25].fifo_size/4; /* setup fifo + format */ - cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], 128, 0); - cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], 128, 0); + cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH25], bpl, 0); + cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH26], bpl, 0); - cx_write(MO_AUDD_LNGTH, 128); /* fifo bpl size */ - cx_write(MO_AUDR_LNGTH, 128); /* fifo bpl size */ + cx_write(MO_AUDD_LNGTH, bpl); /* fifo bpl size */ + cx_write(MO_AUDR_LNGTH, bpl); /* fifo bpl size */ /* start dma */ cx_write(MO_AUD_DMACNTRL, 0x0003); /* Up and Down fifo enable */ |