V4L/DVB (8635): v4l: add AC-3 audio support to the MPEG Encoding API

Some models of the saa6752hs support AC-3. Extend the API with the
necessary controls for AC-3.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-common.c

@@ -187,10 +187,11 @@ const char **v4l2_ctrl_get_menu(u32 id)
 		NULL
 	};
 	static const char *mpeg_audio_encoding[] = {
-		"MPEG-1 Layer I",
-		"MPEG-1 Layer II",
-		"MPEG-1 Layer III",
-		"MPEG-4 AAC",
+		"MPEG-1/2 Layer I",
+		"MPEG-1/2 Layer II",
+		"MPEG-1/2 Layer III",
+		"MPEG-2/4 AAC",
+		"AC-3",
 		NULL
 	};
 	static const char *mpeg_audio_l1_bitrate[] = {
@@ -244,6 +245,28 @@ const char **v4l2_ctrl_get_menu(u32 id)
 		"320 kbps",
 		NULL
 	};
+	static const char *mpeg_audio_ac3_bitrate[] = {
+		"32 kbps",
+		"40 kbps",
+		"48 kbps",
+		"56 kbps",
+		"64 kbps",
+		"80 kbps",
+		"96 kbps",
+		"112 kbps",
+		"128 kbps",
+		"160 kbps",
+		"192 kbps",
+		"224 kbps",
+		"256 kbps",
+		"320 kbps",
+		"384 kbps",
+		"448 kbps",
+		"512 kbps",
+		"576 kbps",
+		"640 kbps",
+		NULL
+	};
 	static const char *mpeg_audio_mode[] = {
 		"Stereo",
 		"Joint Stereo",
@@ -313,6 +336,8 @@ const char **v4l2_ctrl_get_menu(u32 id)
 			return mpeg_audio_l2_bitrate;
 		case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
 			return mpeg_audio_l3_bitrate;
+		case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+			return mpeg_audio_ac3_bitrate;
 		case V4L2_CID_MPEG_AUDIO_MODE:
 			return mpeg_audio_mode;
 		case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
@@ -364,6 +389,7 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 ste
 	case V4L2_CID_MPEG_AUDIO_L1_BITRATE: 	name = "Audio Layer I Bitrate"; break;
 	case V4L2_CID_MPEG_AUDIO_L2_BITRATE: 	name = "Audio Layer II Bitrate"; break;
 	case V4L2_CID_MPEG_AUDIO_L3_BITRATE: 	name = "Audio Layer III Bitrate"; break;
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: 	name = "Audio AC-3 Bitrate"; break;
 	case V4L2_CID_MPEG_AUDIO_MODE: 		name = "Audio Stereo Mode"; break;
 	case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: name = "Audio Stereo Mode Extension"; break;
 	case V4L2_CID_MPEG_AUDIO_EMPHASIS: 	name = "Audio Emphasis"; break;
@@ -409,6 +435,7 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 ste
 	case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
 	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
 	case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
 	case V4L2_CID_MPEG_AUDIO_MODE:
 	case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
 	case V4L2_CID_MPEG_AUDIO_EMPHASIS:
@@ -495,7 +522,7 @@ int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
 	case V4L2_CID_MPEG_AUDIO_ENCODING:
 		return v4l2_ctrl_query_fill(qctrl,
 				V4L2_MPEG_AUDIO_ENCODING_LAYER_1,
-				V4L2_MPEG_AUDIO_ENCODING_AAC, 1,
+				V4L2_MPEG_AUDIO_ENCODING_AC3, 1,
 				V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
 	case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
 		return v4l2_ctrl_query_fill(qctrl,
@@ -512,6 +539,11 @@ int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
 				V4L2_MPEG_AUDIO_L3_BITRATE_32K,
 				V4L2_MPEG_AUDIO_L3_BITRATE_320K, 1,
 				V4L2_MPEG_AUDIO_L3_BITRATE_192K);
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_AUDIO_AC3_BITRATE_32K,
+				V4L2_MPEG_AUDIO_AC3_BITRATE_640K, 1,
+				V4L2_MPEG_AUDIO_AC3_BITRATE_384K);
 	case V4L2_CID_MPEG_AUDIO_MODE:
 		return v4l2_ctrl_query_fill(qctrl,
 				V4L2_MPEG_AUDIO_MODE_STEREO,

include/linux/videodev2.h

@@ -911,6 +911,7 @@ enum v4l2_mpeg_audio_encoding {
 	V4L2_MPEG_AUDIO_ENCODING_LAYER_2 = 1,
 	V4L2_MPEG_AUDIO_ENCODING_LAYER_3 = 2,
 	V4L2_MPEG_AUDIO_ENCODING_AAC     = 3,
+	V4L2_MPEG_AUDIO_ENCODING_AC3     = 4,
 };
 #define V4L2_CID_MPEG_AUDIO_L1_BITRATE 		(V4L2_CID_MPEG_BASE+102)
 enum v4l2_mpeg_audio_l1_bitrate {
@@ -989,6 +990,28 @@ enum v4l2_mpeg_audio_crc {
 	V4L2_MPEG_AUDIO_CRC_CRC16 = 1,
 };
 #define V4L2_CID_MPEG_AUDIO_MUTE 		(V4L2_CID_MPEG_BASE+109)
+#define V4L2_CID_MPEG_AUDIO_AC3_BITRATE		(V4L2_CID_MPEG_BASE+110)
+enum v4l2_mpeg_audio_ac3_bitrate {
+	V4L2_MPEG_AUDIO_AC3_BITRATE_32K  = 0,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_40K  = 1,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_48K  = 2,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_56K  = 3,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_64K  = 4,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_80K  = 5,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_96K  = 6,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_112K = 7,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_128K = 8,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_160K = 9,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_192K = 10,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_224K = 11,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_256K = 12,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_320K = 13,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_384K = 14,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_448K = 15,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_512K = 16,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_576K = 17,
+	V4L2_MPEG_AUDIO_AC3_BITRATE_640K = 18,
+};
 
 /*  MPEG video */
 #define V4L2_CID_MPEG_VIDEO_ENCODING 		(V4L2_CID_MPEG_BASE+200)