Commit 7ba1c40b authored by Ricardo Neri's avatar Ricardo Neri Committed by Takashi Iwai
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ALSA: Add definitions for CEA-861 Audio InfoFrames 



Along with the IEC-60958 channel status word, CEA-861 Audio InfoFrames
are used in HDMI and DisplayPort to describe the parameters of the audio
stream. Hence, drivers for such devices may use these definitions to, for
instance, fill a CEA-861 data structure and pass it to a display driver
to configure an IP.

Signed-off-by: default avatarRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent dd775ae2

include/sound/asound.h

+14 −0
Original line number Diff line number Diff line
@@ -68,6 +68,20 @@ struct snd_aes_iec958 { 
	unsigned char dig_subframe[4];	/* AES/IEC958 subframe bits */

};



/****************************************************************************

 *                                                                          *

 *        CEA-861 Audio InfoFrame. Used in HDMI and DisplayPort		    *

 *                                                                          *

 ****************************************************************************/



struct snd_cea_861_aud_if {

	unsigned char db1_ct_cc; /* coding type and channel count */

	unsigned char db2_sf_ss; /* sample frequency and size */

	unsigned char db3; /* not used, all zeros */

	unsigned char db4_ca; /* channel allocation code */

	unsigned char db5_dminh_lsv; /* downmix inhibit & level-shit values */

};



/****************************************************************************

 *                                                                          *

 *      Section for driver hardware dependent interface - /dev/snd/hw?      *

include/sound/asoundef.h

+41 −0
Original line number Diff line number Diff line
@@ -170,6 +170,47 @@ 
#define IEC958_AES5_CON_CGMSA_COPYNOMORE (2<<0)	/* condition not be used */

#define IEC958_AES5_CON_CGMSA_COPYNEVER	(3<<0)	/* no copying is permitted */



/****************************************************************************

 *                                                                          *

 *        CEA-861 Audio InfoFrame. Used in HDMI and DisplayPort		    *

 *                                                                          *

 ****************************************************************************/

#define CEA861_AUDIO_INFOFRAME_DB1CC		(7<<0) /* mask - channel count */

#define CEA861_AUDIO_INFOFRAME_DB1CT		(0xf<<4) /* mask - coding type */

#define CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM (0<<4) /* refer to stream */

#define CEA861_AUDIO_INFOFRAME_DB1CT_IEC60958	(1<<4) /* IEC-60958 L-PCM */

#define CEA861_AUDIO_INFOFRAME_DB1CT_AC3	(2<<4) /* AC-3 */

#define CEA861_AUDIO_INFOFRAME_DB1CT_MPEG1	(3<<4) /* MPEG1 Layers 1 & 2 */

#define CEA861_AUDIO_INFOFRAME_DB1CT_MP3	(4<<4) /* MPEG1 Layer 3 */

#define CEA861_AUDIO_INFOFRAME_DB1CT_MPEG2_MULTICH (5<<4) /* MPEG2 Multichannel */

#define CEA861_AUDIO_INFOFRAME_DB1CT_AAC	(6<<4) /* AAC */

#define CEA861_AUDIO_INFOFRAME_DB1CT_DTS	(7<<4) /* DTS */

#define CEA861_AUDIO_INFOFRAME_DB1CT_ATRAC	(8<<4) /* ATRAC */

#define CEA861_AUDIO_INFOFRAME_DB1CT_ONEBIT	(9<<4) /* One Bit Audio */

#define CEA861_AUDIO_INFOFRAME_DB1CT_DOLBY_DIG_PLUS (10<<4) /* Dolby Digital + */

#define CEA861_AUDIO_INFOFRAME_DB1CT_DTS_HD	(11<<4) /* DTS-HD */

#define CEA861_AUDIO_INFOFRAME_DB1CT_MAT	(12<<4) /* MAT (MLP) */

#define CEA861_AUDIO_INFOFRAME_DB1CT_DST	(13<<4) /* DST */

#define CEA861_AUDIO_INFOFRAME_DB1CT_WMA_PRO	(14<<4) /* WMA Pro */

#define CEA861_AUDIO_INFOFRAME_DB2SF		(7<<2) /* mask - sample frequency */

#define CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM (0<<2) /* refer to stream */

#define CEA861_AUDIO_INFOFRAME_DB2SF_32000	(1<<2) /* 32kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SF_44100	(2<<2) /* 44.1kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SF_48000	(3<<2) /* 48kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SF_88200	(4<<2) /* 88.2kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SF_96000	(5<<2) /* 96kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SF_176400	(6<<2) /* 176.4kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SF_192000	(7<<2) /* 192kHz */

#define CEA861_AUDIO_INFOFRAME_DB2SS		(3<<0) /* mask - sample size */

#define CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM (0<<0) /* refer to stream */

#define CEA861_AUDIO_INFOFRAME_DB2SS_16BIT	(1<<0) /* 16 bits */

#define CEA861_AUDIO_INFOFRAME_DB2SS_20BIT	(2<<0) /* 20 bits */

#define CEA861_AUDIO_INFOFRAME_DB2SS_24BIT	(3<<0) /* 24 bits */

#define CEA861_AUDIO_INFOFRAME_DB5_DM_INH	(1<<7) /* mask - inhibit downmixing */

#define CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED (0<<7) /* stereo downmix permitted */

#define CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED (1<<7) /* stereo downmis prohibited */

#define CEA861_AUDIO_INFOFRAME_DB5_LSV		(0xf<<3) /* mask - level-shift values */



/*****************************************************************************

 *                                                                           *

 *                            MIDI v1.0 interface                            *

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