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: Ricardo Neri <ricardo.neri@xxxxxx>
---
include/sound/asound.h | 14 ++++++++++++++
include/sound/asoundef.h | 41 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 55 insertions(+), 0 deletions(-)
diff --git a/include/sound/asound.h b/include/sound/asound.h
index a2e4ff5..0876a1e 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -70,6 +70,20 @@ struct snd_aes_iec958 {
/****************************************************************************
* *
+ * 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? *
* *
****************************************************************************/
diff --git a/include/sound/asoundef.h b/include/sound/asoundef.h
index 20ebf32..bb05c02 100644
--- a/include/sound/asoundef.h
+++ b/include/sound/asoundef.h
@@ -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 *
--
1.7.5.4
--
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