[media] saa7164: allow variable length GOP sizes and switch encoder default to CBR

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

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

@@ -33,7 +33,7 @@ int saa7164_api_set_gop_size(struct saa7164_port *port)
 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
 
 	gs.ucRefFrameDist = port->encoder_params.refdist;
-	gs.ucGOPSize = SAA7164_ENCODER_DEFAULT_GOP_SIZE;
+	gs.ucGOPSize = port->encoder_params.gop_size;
 	ret = saa7164_cmd_send(port->dev, port->hwcfg.sourceid, SET_CUR,
 		EU_VIDEO_GOP_STRUCTURE_CONTROL,
 		sizeof(gs), &gs);

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

@@ -42,14 +42,14 @@ static const u32 saa7164_v4l2_ctrls[] = {
 	V4L2_CID_HUE,
 	V4L2_CID_AUDIO_VOLUME,
 	V4L2_CID_SHARPNESS,
+	V4L2_CID_MPEG_STREAM_TYPE,
 	V4L2_CID_MPEG_VIDEO_ASPECT,
+	V4L2_CID_MPEG_VIDEO_B_FRAMES,
 	V4L2_CID_MPEG_VIDEO_GOP_SIZE,
-	V4L2_CID_MPEG_STREAM_TYPE,
 	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
 };
 
@@ -392,6 +392,9 @@ static int saa7164_get_ctrl(struct saa7164_port *port,
 	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 		ctrl->value = params->bitrate_peak;
 		break;
+	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
+		ctrl->value = params->gop_size;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -535,6 +538,9 @@ static int saa7164_set_ctrl(struct saa7164_port *port,
 	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 		params->bitrate_peak = ctrl->value;
 		break;
+	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
+		params->gop_size = ctrl->value;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -1336,11 +1342,12 @@ int saa7164_encoder_register(struct saa7164_port *port)
 	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.bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_CBR;
 	port->encoder_params.stream_type = V4L2_MPEG_STREAM_TYPE_MPEG2_PS;
 	port->encoder_params.ctl_mute = 0;
 	port->encoder_params.ctl_aspect = V4L2_MPEG_VIDEO_ASPECT_4x3;
 	port->encoder_params.refdist = 1;
+	port->encoder_params.gop_size = SAA7164_ENCODER_DEFAULT_GOP_SIZE;
 
 	if (port->encodernorm.id & V4L2_STD_525_60)
 		port->height = 480;

drivers/media/video/saa7164/saa7164.h

@@ -263,6 +263,7 @@ struct saa7164_encoder_params {
 	u32 ctl_mute;
 	u32 ctl_aspect;
 	u32 refdist;
+	u32 gop_size;
 };
 
 struct saa7164_port;