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V4L/DVB (3214): Calculate the saa7115 AMCLK regs instead of using fixed values

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- Calculate the audio master clock registers from the actual
frequencies. This simplifies the code and it also prepares
for adding CGC2 support.
- VIDIOC_INT_AUDIO_CLOCK_FREQ now receives an u32 instead of
an enum. It is more generic and actually easier to implement.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
This commit is contained in:
Hans Verkuil
2006-01-09 15:25:41 -02:00
committed by Mauro Carvalho Chehab
parent 21fa715e67
commit 3578d3dd0b
5 changed files with 55 additions and 147 deletions
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15
include/media/v4l2-common.h
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@@ -26,13 +26,6 @@
#ifndef V4L2_COMMON_H_
#define V4L2_COMMON_H_
/* VIDIOC_INT_AUDIO_CLOCK_FREQ */
enum v4l2_audio_clock_freq {
V4L2_AUDCLK_32_KHZ = 32000,
V4L2_AUDCLK_441_KHZ = 44100,
V4L2_AUDCLK_48_KHZ = 48000,
};
/* VIDIOC_INT_G_REGISTER and VIDIOC_INT_S_REGISTER */
struct v4l2_register {
u32 i2c_id; /* I2C driver ID of the I2C chip. 0 for the I2C adapter. */
@@ -77,10 +70,12 @@ enum v4l2_chip_ident {
/* Reset the I2C chip */
#define VIDIOC_INT_RESET _IO ('d', 102)
/* Set the frequency of the audio clock output.
/* Set the frequency (in Hz) of the audio clock output.
Used to slave an audio processor to the video decoder, ensuring that audio
and video remain synchronized. */
#define VIDIOC_INT_AUDIO_CLOCK_FREQ _IOR ('d', 103, enum v4l2_audio_clock_freq)
and video remain synchronized.
Usual values for the frequency are 48000, 44100 or 32000 Hz.
If the frequency is not supported, then -EINVAL is returned. */
#define VIDIOC_INT_AUDIO_CLOCK_FREQ _IOW ('d', 103, u32)
/* Video decoders that support sliced VBI need to implement this ioctl.
Field p of the v4l2_sliced_vbi_line struct is set to the start of the VBI