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--- a/libavcodec/amfenc.h
+++ b/libavcodec/amfenc.h
@@ -112,6 +112,8 @@
int aud;
int max_consecutive_b_frames;
int max_b_frames;
+ int utun_qp_max;
+ int utun_qp_applied;
int qvbr_quality_level;
int hw_high_motion_quality_boost;
--- a/libavcodec/amfenc_h264.c
+++ b/libavcodec/amfenc_h264.c
@@ -28,6 +28,7 @@
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
+ { "utun_qp_max", "Live QP ceiling", OFFSET(utun_qp_max), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 51, VE },
// Static
/// Usage
{ "usage", "Encoder Usage", OFFSET(usage), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AMF_VIDEO_ENCODER_USAGE_LOW_LATENCY_HIGH_QUALITY, VE, .unit = "usage" },
--- a/libavcodec/amfenc_hevc.c
+++ b/libavcodec/amfenc_hevc.c
@@ -27,6 +27,7 @@
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
+ { "utun_qp_max", "Live QP ceiling", OFFSET(utun_qp_max), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 51, VE },
{ "usage", "Set the encoding usage", OFFSET(usage), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, AMF_VIDEO_ENCODER_HEVC_USAGE_LOW_LATENCY_HIGH_QUALITY, VE, .unit = "usage" },
{ "transcoding", "Generic Transcoding", 0, AV_OPT_TYPE_CONST, {.i64 = AMF_VIDEO_ENCODER_HEVC_USAGE_TRANSCODING }, 0, 0, VE, .unit = "usage" },
{ "ultralowlatency", "Ultra low latency usecase", 0, AV_OPT_TYPE_CONST, {.i64 = AMF_VIDEO_ENCODER_HEVC_USAGE_ULTRA_LOW_LATENCY }, 0, 0, VE, .unit = "usage" },
--- a/libavcodec/amfenc.c
+++ b/libavcodec/amfenc.c
@@ -274,6 +274,7 @@
av_unused int ret;
ctx->hwsurfaces_in_queue = 0;
+ ctx->utun_qp_applied = -1;
ctx->hwsurfaces_in_queue_max = 16;
// configure AMF logger
@@ -680,6 +681,28 @@
}
} else if (!ctx->delayed_surface) { // submit frame
int hw_surface = 0;
+
+ if (ctx->utun_qp_max >= 0 && ctx->utun_qp_max != ctx->utun_qp_applied) {
+ const wchar_t *max_i, *max_p;
+ if (avctx->codec_id == AV_CODEC_ID_H264) {
+ max_i = AMF_VIDEO_ENCODER_MAX_QP;
+ max_p = AMF_VIDEO_ENCODER_MAX_QP;
+ } else if (avctx->codec_id == AV_CODEC_ID_HEVC) {
+ max_i = AMF_VIDEO_ENCODER_HEVC_MAX_QP_I;
+ max_p = AMF_VIDEO_ENCODER_HEVC_MAX_QP_P;
+ } else {
+ av_log(avctx, AV_LOG_ERROR, "Live QP ceiling is unsupported for codec %d\n", avctx->codec_id);
+ return AVERROR(ENOSYS);
+ }
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder, max_i, ctx->utun_qp_max);
+ AMF_RETURN_IF_FALSE(ctx, res == AMF_OK, AVERROR_EXTERNAL, "Live I QP ceiling failed: %d\n", res);
+ if (avctx->codec_id == AV_CODEC_ID_HEVC) {
+ AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder, max_p, ctx->utun_qp_max);
+ AMF_RETURN_IF_FALSE(ctx, res == AMF_OK, AVERROR_EXTERNAL, "Live P QP ceiling failed: %d\n", res);
+ }
+ ctx->utun_qp_applied = ctx->utun_qp_max;
+ av_log(avctx, AV_LOG_INFO, "Live QP ceiling applied qp=%d\n", ctx->utun_qp_max);
+ }
// prepare surface from frame
switch (frame->format) {