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>

2 files changed, 60 insertions, 5 deletions

diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index 893ac496c4b4..0a96cc35738c 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/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,
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 350aba2714fc..9054764f4cde 100644
--- a/include/linux/videodev2.h
+++ b/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)