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radeon/radeon_vce: fix out of target bitrate in CBR mode (H.264)

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StoneyRidge may not comply to required target bitrate
when generating H.264 stream in CBR mode.

Signed-off-by: Louis Li <Ching-shih.Li@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4384>
This commit is contained in:
Louis Li 2020-03-31 10:20:21 +08:00 • committed by Marge Bot
parent 4975b3ec55
commit f7e7cf637e
1 changed files with 11 additions and 1 deletions
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12
src/gallium/drivers/radeon/radeon_vce_52.c
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@ -47,7 +47,17 @@ static void get_rate_control_param(struct rvce_encoder *enc, struct pipe_h264_en
enc->enc_pic.rc.frame_rate_num = pic->rate_ctrl.frame_rate_num;
enc->enc_pic.rc.frame_rate_den = pic->rate_ctrl.frame_rate_den;
enc->enc_pic.rc.max_qp = 51;
enc->enc_pic.rc.vbv_buffer_size = pic->rate_ctrl.vbv_buffer_size;
/* For CBR mode, to guarantee bitrate of generated stream complies with
* target bitrate (e.g. no over +/-10%), vbv_buffer_size should be same
* as target bitrate.
*/
if (enc->enc_pic.rc.rc_method == PIPE_H264_ENC_RATE_CONTROL_METHOD_CONSTANT) {
enc->enc_pic.rc.vbv_buffer_size = pic->rate_ctrl.target_bitrate;
} else {
enc->enc_pic.rc.vbv_buffer_size = pic->rate_ctrl.vbv_buffer_size;
}
enc->enc_pic.rc.vbv_buf_lv = pic->rate_ctrl.vbv_buf_lv;
enc->enc_pic.rc.fill_data_enable = pic->rate_ctrl.fill_data_enable;
enc->enc_pic.rc.enforce_hrd = pic->rate_ctrl.enforce_hrd;