V4L/DVB (10276): cx18, cx2341x, ivtv: Add AC-3 audio encoding control to cx18

Initial addition of controls to set AC-3 audio encoding for the CX23418 - it
does not work yet due to firmware or cx18 driver issues.  This change affects
the common cx2341x and ivtv modules due to shared structures and
common functions.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-driver.c

@@ -587,7 +587,8 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
 		(cx->params.video_temporal_filter_mode << 1) |
 		(cx->params.video_median_filter_type << 2);
 	cx->params.port = CX2341X_PORT_MEMORY;
-	cx->params.capabilities = CX2341X_CAP_HAS_TS;
+	cx->params.capabilities = CX2341X_CAP_HAS_TS   | CX2341X_CAP_HAS_AC3 |
+				  CX2341X_CAP_HAS_LPCM;
 	init_waitqueue_head(&cx->cap_w);
 	init_waitqueue_head(&cx->mb_apu_waitq);
 	init_waitqueue_head(&cx->mb_cpu_waitq);

drivers/media/video/cx18/cx18-driver.h

@@ -413,7 +413,7 @@ struct cx18 {
 
 	/* dualwatch */
 	unsigned long dualwatch_jiffies;
-	u16 dualwatch_stereo_mode;
+	u32 dualwatch_stereo_mode;
 
 	/* Digitizer type */
 	int digitizer;		/* 0x00EF = saa7114 0x00FO = saa7115 0x0106 = mic */

drivers/media/video/cx18/cx18-fileops.c

@@ -128,10 +128,10 @@ static void cx18_release_stream(struct cx18_stream *s)
 static void cx18_dualwatch(struct cx18 *cx)
 {
 	struct v4l2_tuner vt;
-	u16 new_bitmap;
-	u16 new_stereo_mode;
-	const u16 stereo_mask = 0x0300;
-	const u16 dual = 0x0200;
+	u32 new_bitmap;
+	u32 new_stereo_mode;
+	const u32 stereo_mask = 0x0300;
+	const u32 dual = 0x0200;
 	u32 h;
 
 	new_stereo_mode = cx->params.audio_properties & stereo_mask;

drivers/media/video/cx2341x.c

 /*
- * cx2341x - generic code for cx23415/6 based devices
+ * cx2341x - generic code for cx23415/6/8 based devices
  *
  * Copyright (C) 2006 Hans Verkuil <hverkuil@xs4all.nl>
  *
@@ -30,7 +30,7 @@
 #include <media/cx2341x.h>
 #include <media/v4l2-common.h>
 
-MODULE_DESCRIPTION("cx23415/6 driver");
+MODULE_DESCRIPTION("cx23415/6/8 driver");
 MODULE_AUTHOR("Hans Verkuil");
 MODULE_LICENSE("GPL");
 
@@ -45,6 +45,7 @@ const u32 cx2341x_mpeg_ctrls[] = {
 	V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 	V4L2_CID_MPEG_AUDIO_ENCODING,
 	V4L2_CID_MPEG_AUDIO_L2_BITRATE,
+	V4L2_CID_MPEG_AUDIO_AC3_BITRATE,
 	V4L2_CID_MPEG_AUDIO_MODE,
 	V4L2_CID_MPEG_AUDIO_MODE_EXTENSION,
 	V4L2_CID_MPEG_AUDIO_EMPHASIS,
@@ -94,6 +95,7 @@ static const struct cx2341x_mpeg_params default_params = {
 	.audio_sampling_freq = V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000,
 	.audio_encoding = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
 	.audio_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_224K,
+	.audio_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_224K,
 	.audio_mode = V4L2_MPEG_AUDIO_MODE_STEREO,
 	.audio_mode_extension = V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4,
 	.audio_emphasis = V4L2_MPEG_AUDIO_EMPHASIS_NONE,
@@ -148,6 +150,9 @@ static int cx2341x_get_ctrl(const struct cx2341x_mpeg_params *params,
 	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
 		ctrl->value = params->audio_l2_bitrate;
 		break;
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+		ctrl->value = params->audio_ac3_bitrate;
+		break;
 	case V4L2_CID_MPEG_AUDIO_MODE:
 		ctrl->value = params->audio_mode;
 		break;
@@ -256,6 +261,12 @@ static int cx2341x_set_ctrl(struct cx2341x_mpeg_params *params, int busy,
 		params->audio_sampling_freq = ctrl->value;
 		break;
 	case V4L2_CID_MPEG_AUDIO_ENCODING:
+		if (busy)
+			return -EBUSY;
+		if (params->capabilities & CX2341X_CAP_HAS_AC3 &&
+		    ctrl->value != V4L2_MPEG_AUDIO_ENCODING_LAYER_2 &&
+		    ctrl->value != V4L2_MPEG_AUDIO_ENCODING_AC3)
+			return -EINVAL;
 		params->audio_encoding = ctrl->value;
 		break;
 	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
@@ -263,6 +274,11 @@ static int cx2341x_set_ctrl(struct cx2341x_mpeg_params *params, int busy,
 			return -EBUSY;
 		params->audio_l2_bitrate = ctrl->value;
 		break;
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+		if (busy)
+			return -EBUSY;
+		params->audio_ac3_bitrate = ctrl->value;
+		break;
 	case V4L2_CID_MPEG_AUDIO_MODE:
 		params->audio_mode = ctrl->value;
 		break;
@@ -482,6 +498,12 @@ int cx2341x_ctrl_query(const struct cx2341x_mpeg_params *params,
 
 	switch (qctrl->id) {
 	case V4L2_CID_MPEG_AUDIO_ENCODING:
+		if (params->capabilities & CX2341X_CAP_HAS_AC3)
+			return v4l2_ctrl_query_fill(qctrl,
+					V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
+					V4L2_MPEG_AUDIO_ENCODING_AC3, 1,
+					default_params.audio_encoding);
+
 		return v4l2_ctrl_query_fill(qctrl,
 				V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
 				V4L2_MPEG_AUDIO_ENCODING_LAYER_2, 1,
@@ -497,6 +519,12 @@ int cx2341x_ctrl_query(const struct cx2341x_mpeg_params *params,
 	case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
 		return -EINVAL;
 
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_AUDIO_AC3_BITRATE_48K,
+				V4L2_MPEG_AUDIO_AC3_BITRATE_448K, 1,
+				default_params.audio_ac3_bitrate);
+
 	case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
 		err = v4l2_ctrl_query_fill_std(qctrl);
 		if (err == 0 &&
@@ -671,6 +699,15 @@ const char **cx2341x_ctrl_get_menu(const struct cx2341x_mpeg_params *p, u32 id)
 		NULL
 	};
 
+	static const char *mpeg_audio_encoding_l2_ac3[] = {
+		"",
+		"MPEG-1/2 Layer II",
+		"",
+		"",
+		"AC-3",
+		NULL
+	};
+
 	static const char *cx2341x_video_spatial_filter_mode_menu[] = {
 		"Manual",
 		"Auto",
@@ -711,6 +748,9 @@ const char **cx2341x_ctrl_get_menu(const struct cx2341x_mpeg_params *p, u32 id)
 	case V4L2_CID_MPEG_STREAM_TYPE:
 		return (p->capabilities & CX2341X_CAP_HAS_TS) ?
 			mpeg_stream_type_with_ts : mpeg_stream_type_without_ts;
+	case V4L2_CID_MPEG_AUDIO_ENCODING:
+		return (p->capabilities & CX2341X_CAP_HAS_AC3) ?
+			mpeg_audio_encoding_l2_ac3 : v4l2_ctrl_get_menu(id);
 	case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
 	case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
 		return NULL;
@@ -730,16 +770,34 @@ const char **cx2341x_ctrl_get_menu(const struct cx2341x_mpeg_params *p, u32 id)
 }
 EXPORT_SYMBOL(cx2341x_ctrl_get_menu);
 
+/* definitions for audio properties bits 29-28 */
+#define CX2341X_AUDIO_ENCDING_METHOD_MPEG	0
+#define CX2341X_AUDIO_ENCDING_METHOD_AC3	1
+#define CX2341X_AUDIO_ENCDING_METHOD_LPCM	2
+
 static void cx2341x_calc_audio_properties(struct cx2341x_mpeg_params *params)
 {
-	params->audio_properties = (params->audio_sampling_freq << 0) |
-		((3 - params->audio_encoding) << 2) |
-		((1 + params->audio_l2_bitrate) << 4) |
+	params->audio_properties =
+		(params->audio_sampling_freq << 0) |
 		(params->audio_mode << 8) |
 		(params->audio_mode_extension << 10) |
 		(((params->audio_emphasis == V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17)
 		  ? 3 : params->audio_emphasis) << 12) |
 		(params->audio_crc << 14);
+
+	if ((params->capabilities & CX2341X_CAP_HAS_AC3) &&
+	    params->audio_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
+		params->audio_properties |=
+			/* Not sure if this MPEG Layer II setting is required */
+			((3 - V4L2_MPEG_AUDIO_ENCODING_LAYER_2) << 2) |
+			(params->audio_ac3_bitrate << 4) |
+			(CX2341X_AUDIO_ENCDING_METHOD_AC3 << 28);
+	} else {
+		/* Assuming MPEG Layer II */
+		params->audio_properties |=
+			((3 - params->audio_encoding) << 2) |
+			((1 + params->audio_l2_bitrate) << 4);
+	}
 }
 
 int cx2341x_ext_ctrls(struct cx2341x_mpeg_params *params, int busy,
@@ -1022,7 +1080,10 @@ void cx2341x_log_status(const struct cx2341x_mpeg_params *p, const char *prefix)
 		prefix,
 		cx2341x_menu_item(p, V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ),
 		cx2341x_menu_item(p, V4L2_CID_MPEG_AUDIO_ENCODING),
-		cx2341x_menu_item(p, V4L2_CID_MPEG_AUDIO_L2_BITRATE),
+		cx2341x_menu_item(p,
+			   p->audio_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3
+					      ? V4L2_CID_MPEG_AUDIO_AC3_BITRATE
+					      : V4L2_CID_MPEG_AUDIO_L2_BITRATE),
 		cx2341x_menu_item(p, V4L2_CID_MPEG_AUDIO_MODE),
 		p->audio_mute ? " (muted)" : "");
 	if (p->audio_mode == V4L2_MPEG_AUDIO_MODE_JOINT_STEREO)

drivers/media/video/ivtv/ivtv-driver.h

@@ -696,7 +696,7 @@ struct ivtv {
 	u64 vbi_data_inserted;          /* number of VBI bytes inserted into the MPEG stream */
 	u32 last_dec_timing[3];         /* cache last retrieved pts/scr/frame values */
 	unsigned long dualwatch_jiffies;/* jiffies value of the previous dualwatch check */
-	u16 dualwatch_stereo_mode;      /* current detected dualwatch stereo mode */
+	u32 dualwatch_stereo_mode;      /* current detected dualwatch stereo mode */
 
 
 	/* VBI state info */

drivers/media/video/ivtv/ivtv-fileops.c

@@ -148,10 +148,10 @@ void ivtv_release_stream(struct ivtv_stream *s)
 static void ivtv_dualwatch(struct ivtv *itv)
 {
 	struct v4l2_tuner vt;
-	u16 new_bitmap;
-	u16 new_stereo_mode;
-	const u16 stereo_mask = 0x0300;
-	const u16 dual = 0x0200;
+	u32 new_bitmap;
+	u32 new_stereo_mode;
+	const u32 stereo_mask = 0x0300;
+	const u32 dual = 0x0200;
 
 	new_stereo_mode = itv->params.audio_properties & stereo_mask;
 	memset(&vt, 0, sizeof(vt));

include/media/cx2341x.h

 /*
-    cx23415/6 header containing common defines.
+    cx23415/6/8 header containing common defines.
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -28,6 +28,8 @@ enum cx2341x_port {
 enum cx2341x_cap {
 	CX2341X_CAP_HAS_SLICED_VBI = 1 << 0,
 	CX2341X_CAP_HAS_TS 	   = 1 << 1,
+	CX2341X_CAP_HAS_AC3 	   = 1 << 2,
+	CX2341X_CAP_HAS_LPCM	   = 1 << 3,
 };
 
 struct cx2341x_mpeg_params {
@@ -47,11 +49,12 @@ struct cx2341x_mpeg_params {
 	enum v4l2_mpeg_audio_sampling_freq audio_sampling_freq;
 	enum v4l2_mpeg_audio_encoding audio_encoding;
 	enum v4l2_mpeg_audio_l2_bitrate audio_l2_bitrate;
+	enum v4l2_mpeg_audio_ac3_bitrate audio_ac3_bitrate;
 	enum v4l2_mpeg_audio_mode audio_mode;
 	enum v4l2_mpeg_audio_mode_extension audio_mode_extension;
 	enum v4l2_mpeg_audio_emphasis audio_emphasis;
 	enum v4l2_mpeg_audio_crc audio_crc;
-	u16 audio_properties;
+	u32 audio_properties;
 	u16 audio_mute;
 
 	/* video */