[Mesa-dev] [PATCH] radeonsi: Add support for midstream bitrate change in encoder

[Sharma, Deepak]

[AMD Official Use Only - Internal Distribution Only]

Acked-by: Deepak Sharma <Deepak.Sharma at amd.com>

-----Original Message-----
From: Sahu, Satyajit <Satyajit.Sahu at amd.com> 
Sent: Monday, December 2, 2019 8:31 PM
To: mesa-dev at lists.freedesktop.org
Cc: Zhang, Boyuan <Boyuan.Zhang at amd.com>; Sharma, Deepak <Deepak.Sharma at amd.com>; Sahu, Satyajit <Satyajit.Sahu at amd.com>
Subject: [PATCH] radeonsi: Add support for midstream bitrate change in encoder

Added support for bitrate change in between encoding.

Signed-off-by: Satyajit Sahu <mailto:satyajit.sahu at amd.com>

diff --git a/src/gallium/drivers/radeon/radeon_vce.c b/src/gallium/drivers/radeon/radeon_vce.c
index 84d3c1e2fa4..7d7a2fa4eb3 100644
--- a/src/gallium/drivers/radeon/radeon_vce.c
+++ b/src/gallium/drivers/radeon/radeon_vce.c
@@ -268,7 +268,8 @@ static void rvce_begin_frame(struct pipe_video_codec *encoder,
 		enc->pic.rate_ctrl.rate_ctrl_method != pic->rate_ctrl.rate_ctrl_method ||
 		enc->pic.quant_i_frames != pic->quant_i_frames ||
 		enc->pic.quant_p_frames != pic->quant_p_frames ||
-		enc->pic.quant_b_frames != pic->quant_b_frames;
+		enc->pic.quant_b_frames != pic->quant_b_frames ||
+		enc->pic.rate_ctrl.target_bitrate != pic->rate_ctrl.target_bitrate;
 
 	enc->pic = *pic;
 	si_get_pic_param(enc, pic);
diff --git a/src/gallium/drivers/radeon/radeon_vcn_enc.c b/src/gallium/drivers/radeon/radeon_vcn_enc.c
index aa9182f273b..c4fb9a7bd92 100644
--- a/src/gallium/drivers/radeon/radeon_vcn_enc.c
+++ b/src/gallium/drivers/radeon/radeon_vcn_enc.c
@@ -247,6 +247,17 @@ static void radeon_enc_begin_frame(struct pipe_video_codec *encoder,  {
 	struct radeon_encoder *enc = (struct radeon_encoder*)encoder;
 	struct vl_video_buffer *vid_buf = (struct vl_video_buffer *)source;
+	bool need_rate_control = false;
+
+	if (u_reduce_video_profile(enc->base.profile) == PIPE_VIDEO_FORMAT_MPEG4_AVC) {
+		struct pipe_h264_enc_picture_desc *pic = (struct pipe_h264_enc_picture_desc *)picture;
+		need_rate_control =
+			enc->enc_pic.rc_layer_init.target_bit_rate != pic->rate_ctrl.target_bitrate;
+	} else if (u_reduce_video_profile(picture->profile) == PIPE_VIDEO_FORMAT_HEVC) {
+                struct pipe_h265_enc_picture_desc *pic = (struct pipe_h265_enc_picture_desc *)picture;
+		need_rate_control =
+			enc->enc_pic.rc_layer_init.target_bit_rate != pic->rc.target_bitrate;
+	}
 
 	radeon_vcn_enc_get_param(enc, picture);
 
@@ -266,6 +277,10 @@ static void radeon_enc_begin_frame(struct pipe_video_codec *encoder,
 		flush(enc);
 		si_vid_destroy_buffer(&fb);
 	}
+	if (need_rate_control) {
+		enc->begin(enc, picture);
+		flush(enc);
+	}
 }
 
 static void radeon_enc_encode_bitstream(struct pipe_video_codec *encoder,
--
2.17.1