linux-amlogic: Fix VC-1 micro stutter

packages/linux/patches/amlogic-3.14/linux-011-correct-PTS-on-I-Frames.patch

@@ -0,0 +1,63 @@
+From 5f922844e81612991906bfba16c3fc503dca8211 Mon Sep 17 00:00:00 2001
+From: Markus Pfau <pfau@peak3d.de>
+Date: Thu, 30 Mar 2017 23:58:41 +0200
+Subject: [PATCH 1/1] correct PTS on I-Frames
+
+---
+ drivers/amlogic/amports/vvc1.c | 17 ++++++++++++++++-
+ 1 file changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/amlogic/amports/vvc1.c b/drivers/amlogic/amports/vvc1.c
+index 29bd4a3400d8..82e9696bc068 100644
+--- a/drivers/amlogic/amports/vvc1.c
++++ b/drivers/amlogic/amports/vvc1.c
+@@ -123,6 +123,7 @@ static u32 pts_by_offset = 1;
+ static u32 total_frame;
+ static u32 next_pts;
+ static u64 next_pts_us64;
++static unsigned int bframe_count;
+
+ #ifdef DEBUG_PTS
+ static u32 pts_hit, pts_missed, pts_i_hit, pts_i_missed;
+@@ -259,7 +260,7 @@ static irqreturn_t vvc1_isr(int irq, void *dev_id)
+ 	u32 picture_type;
+ 	u32 buffer_index;
+ 	unsigned int pts, pts_valid = 0, offset;
+-	u32 v_width, v_height;
++	u32 v_width, v_height, dur;
+ 	u64 pts_us64 = 0;
+
+ 	reg = READ_VREG(VC1_BUFFEROUT);
+@@ -291,8 +292,21 @@ static irqreturn_t vvc1_isr(int irq, void *dev_id)
+ 		if (pts_by_offset) {
+ 			offset = READ_VREG(VC1_OFFSET_REG);
+ 			if (keyframe_pts_only && (picture_type != I_PICTURE)) {
++				if (picture_type == B_PICTURE)
++					++bframe_count;
++				else
++					bframe_count = 0;
+ 				pts_valid = 0;
+ 			} else if (pts_lookup_offset_us64(PTS_TYPE_VIDEO, offset, &pts, 0, &pts_us64) == 0) {
++				if (keyframe_pts_only)
++				{
++					dur = bframe_count * DUR2PTS(vvc1_amstream_dec_info.rate);
++					if (reg & INTERLACE_FLAG)
++						dur >>= 1;
++					pts += dur;
++					pts_us64 += (dur * 100) / 9;
++					bframe_count = 0;
++				}
+ 				pts_valid = 1;
+ #ifdef DEBUG_PTS
+ 				pts_hit++;
+@@ -861,6 +875,7 @@ static void vvc1_local_init(void)
+
+ 	avi_flag = (unsigned long) vvc1_amstream_dec_info.param;
+ 	keyframe_pts_only = (u32)vvc1_amstream_dec_info.param & 0x100;
++	bframe_count = 0;
+
+ 	total_frame = 0;
+
+-- 
+2.11.0
+