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Date: Wed, 29 Nov 2017 15:25:22 +0200
From: Stanimir Varbanov <stanimir.varbanov@...aro.org>
To: Hans Verkuil <hverkuil@...all.nl>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org,
Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH 2/2] venus: venc: set correctly GOP size and number of B-frames
This change fixes the calculation of B-frames and GOP size by
adopt v4l2 controls with the firmware interface expectations.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
drivers/media/platform/qcom/venus/venc.c | 15 ++++---
drivers/media/platform/qcom/venus/venc_ctrls.c | 60 +++++++++++++++++++++++++-
2 files changed, 69 insertions(+), 6 deletions(-)
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index 36d31540c59d..e3a10a852cad 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -685,8 +685,13 @@ static int venc_set_properties(struct venus_inst *inst)
return ret;
}
+ /* IDR periodicity, n:
+ * n = 0 - only the first I-frame is IDR frame
+ * n = 1 - all I-frames will be IDR frames
+ * n > 1 - every n-th I-frame will be IDR frame
+ */
ptype = HFI_PROPERTY_CONFIG_VENC_IDR_PERIOD;
- idrp.idr_period = ctr->gop_size;
+ idrp.idr_period = 0;
ret = hfi_session_set_property(inst, ptype, &idrp);
if (ret)
return ret;
@@ -700,10 +705,6 @@ static int venc_set_properties(struct venus_inst *inst)
return ret;
}
- /* intra_period = pframes + bframes + 1 */
- if (!ctr->num_p_frames)
- ctr->num_p_frames = 2 * 15 - 1,
-
ptype = HFI_PROPERTY_CONFIG_VENC_INTRA_PERIOD;
intra_period.pframes = ctr->num_p_frames;
intra_period.bframes = ctr->num_b_frames;
@@ -800,6 +801,10 @@ static int venc_init_session(struct venus_inst *inst)
if (ret)
goto deinit;
+ ret = venc_set_properties(inst);
+ if (ret)
+ goto deinit;
+
return 0;
deinit:
hfi_session_deinit(inst);
diff --git a/drivers/media/platform/qcom/venus/venc_ctrls.c b/drivers/media/platform/qcom/venus/venc_ctrls.c
index ab0fe51ff0f7..53130d4774d3 100644
--- a/drivers/media/platform/qcom/venus/venc_ctrls.c
+++ b/drivers/media/platform/qcom/venus/venc_ctrls.c
@@ -30,10 +30,58 @@
#define AT_SLICE_BOUNDARY \
V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY
+static int venc_calc_bpframes(u32 gop_size, u32 conseq_b, u32 *bf, u32 *pf)
+{
+ uint32_t half = (gop_size - 1) >> 1;
+ uint32_t b, p, ratio;
+ bool found = false;
+
+ if (!gop_size)
+ return -EINVAL;
+
+ *bf = *pf = 0;
+
+ if (!conseq_b) {
+ *pf = gop_size - 1;
+ return 0;
+ }
+
+ b = p = half;
+
+ for (; b <= gop_size - 1; b++, p--) {
+ if (b % p)
+ continue;
+
+ ratio = b;
+ do_div(ratio, p);
+
+ if (ratio == conseq_b) {
+ found = true;
+ break;
+ }
+
+ if (ratio > conseq_b)
+ break;
+ }
+
+ if (found == false)
+ return -EINVAL;
+
+ if (b + p + 1 != gop_size)
+ return -EINVAL;
+
+ *bf = b;
+ *pf = p;
+
+ return 0;
+}
+
static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct venus_inst *inst = ctrl_to_inst(ctrl);
struct venc_controls *ctr = &inst->controls.enc;
+ u32 bframes;
+ int ret;
switch (ctrl->id) {
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
@@ -102,6 +150,11 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB:
break;
case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
+ ret = venc_calc_bpframes(ctrl->val, ctr->num_b_frames, &bframes,
+ &ctr->num_p_frames);
+ if (ret)
+ return ret;
+
ctr->gop_size = ctrl->val;
break;
case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD:
@@ -114,7 +167,12 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
ctr->vp8_max_qp = ctrl->val;
break;
case V4L2_CID_MPEG_VIDEO_B_FRAMES:
- ctr->num_b_frames = ctrl->val;
+ ret = venc_calc_bpframes(ctr->gop_size, ctrl->val, &bframes,
+ &ctr->num_p_frames);
+ if (ret)
+ return ret;
+
+ ctr->num_b_frames = bframes;
break;
default:
return -EINVAL;
--
2.11.0
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