[media] saa7164: implement encoder peak bitrate feature

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7164/saa7164-api.c

@@ -64,7 +64,7 @@ int saa7164_api_set_encoder(struct saa7164_port *port)
 	else
 		vb.ucVideoBitRateMode = EU_VIDEO_BIT_RATE_MODE_VARIABLE_PEAK;
 	vb.dwVideoBitRate = port->encoder_params.bitrate;
-	vb.dwVideoBitRatePeak = vb.dwVideoBitRate;
+	vb.dwVideoBitRatePeak = port->encoder_params.bitrate_peak;
 	ret = saa7164_cmd_send(port->dev, port->hwcfg.sourceid, SET_CUR,
 		EU_VIDEO_BIT_RATE_CONTROL, sizeof(tmComResEncVideoBitRate_t), &vb);
 	if (ret != SAA_OK)

drivers/media/video/saa7164/saa7164-encoder.c

@@ -47,6 +47,7 @@ static const u32 saa7164_v4l2_ctrls[] = {
 	V4L2_CID_MPEG_AUDIO_MUTE,
 	V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 	V4L2_CID_MPEG_VIDEO_BITRATE,
+	V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 	V4L2_CID_MPEG_VIDEO_B_FRAMES,
 	0
 };
@@ -387,6 +388,9 @@ static int saa7164_get_ctrl(struct saa7164_port *port,
 	case V4L2_CID_MPEG_VIDEO_B_FRAMES:
 		ctrl->value = params->refdist;
 		break;
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+		ctrl->value = params->bitrate_peak;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -456,6 +460,11 @@ static int saa7164_try_ctrl(struct v4l2_ext_control *ctrl, int ac3)
 			(ctrl->value <= 3))
 			ret = 0;
 		break;
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+		if ((ctrl->value >= ENCODER_MIN_BITRATE) &&
+			(ctrl->value <= ENCODER_MAX_BITRATE))
+			ret = 0;
+		break;
 	default:
 		ret = -EINVAL;
 	}
@@ -521,6 +530,9 @@ static int saa7164_set_ctrl(struct saa7164_port *port,
 	case V4L2_CID_MPEG_VIDEO_B_FRAMES:
 		params->refdist = ctrl->value;
 		break;
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+		params->bitrate_peak = ctrl->value;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -698,6 +710,10 @@ static int fill_queryctrl(struct saa7164_encoder_params *params,
 	case V4L2_CID_MPEG_VIDEO_B_FRAMES:
 		return v4l2_ctrl_query_fill(c,
 			1, 3, 1, 1);
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+		return v4l2_ctrl_query_fill(c,
+			ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
+			100000, ENCODER_DEF_BITRATE);
 	default:
 		return -EINVAL;
 	}
@@ -1318,6 +1334,7 @@ int saa7164_encoder_register(struct saa7164_port *port)
 	port->ctl_saturation = 62;
 	port->ctl_sharpness = 8;
 	port->encoder_params.bitrate = ENCODER_DEF_BITRATE;
+	port->encoder_params.bitrate_peak = ENCODER_DEF_BITRATE;
 	port->encoder_params.bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR;
 	port->encoder_params.stream_type = V4L2_MPEG_STREAM_TYPE_MPEG2_PS;
 	port->encoder_params.ctl_mute = 0;

drivers/media/video/saa7164/saa7164.h

@@ -255,6 +255,7 @@ struct saa7164_encoder_params {
 	u32 width;
 	u32 is_50hz;
 	u32 bitrate; /* bps */
+	u32 bitrate_peak; /* bps */
 	u32 bitrate_mode;
 	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */