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Audio: Add hooks for fast-forward and rewind needed by CMediaPlayer; add hooks for equalizer settings needed by the WM8904

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This commit is contained in:
Gregory Nutt
2014-07-24 08:28:10 -06:00
parent 82aa010083
commit ca779ece55
3 changed files with 62 additions and 11 deletions
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include/nuttx/audio/audio.h
+20 -3
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@@ -126,6 +126,23 @@
* and low-level audio drivers. This ioctls are not used by the higher
* level audio logic and need be implemented only in low-level audio
* drivers that are driven by a decoder.
*
* AUDIOIOC_BITRATE - Set bit rate
*
* ioctl argument: Audio bit rate in bits per second
* Range: 1-65535 BPS (Compare to AUDIO_BIT_RATE_* definitions)
*
* AUDIOIOC_NCHANNELS - Set number of audio channels
*
* ioctl argument: Number of audio channels. 1=MONO, 2=STEREO, etc.
* Range: 1-255, however most drivers will support only
* 1 and possibly 2
*
* AUDIOIOC_SAMPWIDTH - Set sample bit width
*
* ioctl argument: Sample bit width: 8=8-bit data, 16=16-bit data, etc.
* Range: 1-255, however, many drivers will support only
* one sample bit width.
*/
#define AUDIOIOC_BITRATE _AUDIOIOC(17)
@@ -134,9 +151,9 @@
/* Audio Device Types *******************************************************/
/* The NuttX audio interface support different types of audio devices for
* input, output, synthesis, and manupulation of audio data. A given driver/
* input, output, synthesis, and manipulation of audio data. A given driver/
* device could support a combination of these device type. The following
* is a list of bit-field definitons for defining the device type.
* is a list of bit-field definitions for defining the device type.
*/
#define AUDIO_TYPE_QUERY 0x00
@@ -151,7 +168,7 @@
/* Audio Format Types *******************************************************/
/* The following defines the audio data format types in NuttX. During a
* format query, these will be converted to bit positions withing the
* format query, these will be converted to bit positions within the
* ac_format field, meaning we currently only support up to 16 formats. To
* support more than that, we will use the FMT_OTHER entry, and the
* interfacing software can perform a second query to get the other formats.