| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <22af9d61-fdbe-4347-a1b0-1f8696a77f38@oss.qualcomm.com>
Date: Thu, 29 Jan 2026 17:07:17 +0530
From: Vikash Garodia <vikash.garodia@....qualcomm.com>
To: Wangao Wang <wangao.wang@....qualcomm.com>,
Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
Abhinav Kumar <abhinav.kumar@...ux.dev>,
Bryan O'Donoghue <bod@...nel.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: quic_qiweil@...cinc.com, Renjiang Han <renjiang.han@....qualcomm.com>,
linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/6] media: qcom: iris: Add hierarchical coding support
for encoder
On 1/29/2026 1:18 PM, Wangao Wang wrote:
> Add hierarchical coding support for both gen1 and gen2 encoders by enabling
> the following V4L2 controls:
> H264:
> V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING,
> V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE,
> V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER
> HEVC(gen2 only):
> V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE,
> V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER
>
> Signed-off-by: Wangao Wang <wangao.wang@....qualcomm.com>
> ---
> drivers/media/platform/qcom/iris/iris_ctrls.c | 287 ++++++++++++++++++++-
> drivers/media/platform/qcom/iris/iris_ctrls.h | 7 +-
> .../platform/qcom/iris/iris_hfi_gen1_command.c | 21 +-
> .../platform/qcom/iris/iris_hfi_gen1_defines.h | 2 +
> .../platform/qcom/iris/iris_hfi_gen2_defines.h | 15 ++
> drivers/media/platform/qcom/iris/iris_instance.h | 4 +
> .../platform/qcom/iris/iris_platform_common.h | 23 ++
> .../media/platform/qcom/iris/iris_platform_gen1.c | 94 ++++++-
> .../media/platform/qcom/iris/iris_platform_gen2.c | 182 ++++++++++++-
> drivers/media/platform/qcom/iris/iris_vpu_buffer.c | 28 ++
> 10 files changed, 655 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/iris/iris_ctrls.c b/drivers/media/platform/qcom/iris/iris_ctrls.c
> index e049c28db1d8395736ae6970b5efbb351ce427dd..b7f0cce8ec7da5336156d0780d84dff6d0f50535 100644
> --- a/drivers/media/platform/qcom/iris/iris_ctrls.c
> +++ b/drivers/media/platform/qcom/iris/iris_ctrls.c
> @@ -120,6 +120,40 @@ static enum platform_inst_fw_cap_type iris_get_cap_id(u32 id)
> return MARK_LTR;
> case V4L2_CID_MPEG_VIDEO_B_FRAMES:
> return B_FRAME;
> + case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING:
> + return LAYER_ENABLE;
> + case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE:
> + return LAYER_TYPE_H264;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
> + return LAYER_TYPE_HEVC;
> + case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:
> + return LAYER_COUNT_H264;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER:
> + return LAYER_COUNT_HEVC;
> + case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR:
> + return LAYER0_BITRATE_H264;
> + case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR:
> + return LAYER1_BITRATE_H264;
> + case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR:
> + return LAYER2_BITRATE_H264;
> + case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR:
> + return LAYER3_BITRATE_H264;
> + case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR:
> + return LAYER4_BITRATE_H264;
> + case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR:
> + return LAYER5_BITRATE_H264;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR:
> + return LAYER0_BITRATE_HEVC;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR:
> + return LAYER1_BITRATE_HEVC;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR:
> + return LAYER2_BITRATE_HEVC;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR:
> + return LAYER3_BITRATE_HEVC;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR:
> + return LAYER4_BITRATE_HEVC;
> + case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR:
> + return LAYER5_BITRATE_HEVC;
> default:
> return INST_FW_CAP_MAX;
> }
> @@ -229,6 +263,40 @@ static u32 iris_get_v4l2_id(enum platform_inst_fw_cap_type cap_id)
> return V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX;
> case B_FRAME:
> return V4L2_CID_MPEG_VIDEO_B_FRAMES;
> + case LAYER_ENABLE:
> + return V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING;
> + case LAYER_TYPE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE;
> + case LAYER_TYPE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE;
> + case LAYER_COUNT_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER;
> + case LAYER_COUNT_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER;
> + case LAYER0_BITRATE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR;
> + case LAYER1_BITRATE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR;
> + case LAYER2_BITRATE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR;
> + case LAYER3_BITRATE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR;
> + case LAYER4_BITRATE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR;
> + case LAYER5_BITRATE_H264:
> + return V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR;
> + case LAYER0_BITRATE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR;
> + case LAYER1_BITRATE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR;
> + case LAYER2_BITRATE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR;
> + case LAYER3_BITRATE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR;
> + case LAYER4_BITRATE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR;
> + case LAYER5_BITRATE_HEVC:
> + return V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR;
> default:
> return 0;
> }
> @@ -575,7 +643,63 @@ int iris_set_header_mode_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_
> &hfi_val, sizeof(u32));
> }
>
> -int iris_set_bitrate(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +int iris_set_bitrate_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + u32 entropy_mode = inst->fw_caps[ENTROPY_MODE].value;
> + u32 bitrate = inst->fw_caps[cap_id].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + struct hfi_bitrate hfi_val;
> + u32 max_bitrate;
> +
> + if (!(inst->fw_caps[cap_id].flags & CAP_FLAG_CLIENT_SET) && cap_id != BITRATE)
> + return -EINVAL;
> +
> + if (inst->codec == V4L2_PIX_FMT_HEVC)
> + max_bitrate = CABAC_MAX_BITRATE;
> +
> + if (entropy_mode == V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC)
> + max_bitrate = CABAC_MAX_BITRATE;
> + else
> + max_bitrate = CAVLC_MAX_BITRATE;
check this logic, for hevc, its reassiging
> +
> + hfi_val.bitrate = min(bitrate, max_bitrate);
> +
> + switch (cap_id) {
> + case BITRATE:
> + case LAYER0_BITRATE_H264:
> + hfi_val.layer_id = 0;
> + break;
> + case LAYER1_BITRATE_H264:
> + hfi_val.layer_id = 1;
> + break;
> + case LAYER2_BITRATE_H264:
> + hfi_val.layer_id = 2;
> + break;
> + case LAYER3_BITRATE_H264:
> + hfi_val.layer_id = 3;
> + break;
> + case LAYER4_BITRATE_H264:
> + hfi_val.layer_id = 4;
> + break;
> + case LAYER5_BITRATE_H264:
> + hfi_val.layer_id = 5;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + if (hfi_val.layer_id > 0 && !inst->fw_caps[LAYER_ENABLE].value)
> + return -EINVAL;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_STRUCTURE,
> + &hfi_val, sizeof(hfi_val));
> +}
> +
> +int iris_set_bitrate_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> {
> const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> u32 entropy_mode = inst->fw_caps[ENTROPY_MODE].value;
> @@ -1191,6 +1315,167 @@ int iris_set_intra_period(struct iris_inst *inst, enum platform_inst_fw_cap_type
> &intra_period, sizeof(intra_period));
> }
>
> +int iris_set_layer_type(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + u32 layer_enable = inst->fw_caps[LAYER_ENABLE].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + u32 layer_type;
> +
> + if (inst->hfi_rc_type == HFI_RATE_CONTROL_CQ ||
> + inst->hfi_rc_type == HFI_RATE_CONTROL_OFF)
> + return -EINVAL;
> +
> + if (inst->codec == V4L2_PIX_FMT_H264) {
> + if (!layer_enable || !inst->fw_caps[LAYER_COUNT_H264].value)
> + return -EINVAL;
> +
> + if (inst->fw_caps[LAYER_TYPE_H264].value ==
> + V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P) {
> + if (inst->hfi_rc_type == HFI_RC_VBR_CFR)
> + layer_type = HFI_HIER_P_HYBRID_LTR;
> + else
> + layer_type = HFI_HIER_P_SLIDING_WINDOW;
> + } else if (inst->fw_caps[LAYER_TYPE_H264].value ==
> + V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B) {
> + if (inst->hfi_rc_type == HFI_RC_VBR_CFR)
> + layer_type = HFI_HIER_B;
> + else
> + return -EINVAL;
> + } else {
> + return -EINVAL;
> + }
> + } else if (inst->codec == V4L2_PIX_FMT_HEVC) {
> + if (!inst->fw_caps[LAYER_COUNT_HEVC].value)
> + return -EINVAL;
> +
> + if (inst->fw_caps[LAYER_TYPE_HEVC].value ==
> + V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P) {
> + layer_type = HFI_HIER_P_SLIDING_WINDOW;
> + } else if (inst->fw_caps[LAYER_TYPE_HEVC].value ==
> + V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B) {
> + if (inst->hfi_rc_type == HFI_RC_VBR_CFR)
> + layer_type = HFI_HIER_B;
> + else
> + return -EINVAL;
> + } else {
> + return -EINVAL;
> + }
> + } else {
> + return -EINVAL;
> + }
> +
> + inst->hfi_layer_type = layer_type;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32_ENUM,
> + &layer_type, sizeof(u32));
> +}
> +
> +int iris_set_layer_count_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + struct vb2_queue *sq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> + struct vb2_queue *dq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> + u32 layer_enable = inst->fw_caps[LAYER_ENABLE].value;
> + u32 layer_count = inst->fw_caps[cap_id].value;
> + u32 hfi_id, ret;
> +
> + if (!layer_enable || !layer_count)
> + return -EINVAL;
> +
> + inst->hfi_layer_count = layer_count;
does it include base layer as well ? It does for gen2, so keep the
uniformity.
> +
> + if (!vb2_is_streaming(sq) && !vb2_is_streaming(dq)) {
> + hfi_id = HFI_PROPERTY_PARAM_VENC_HIER_P_MAX_NUM_ENH_LAYER;
> + ret = hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32,
> + &layer_count, sizeof(u32));
> + if (ret)
> + return ret;
> + }
> +
> + hfi_id = inst->fw_caps[cap_id].hfi_id;
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32,
> + &layer_count, sizeof(u32));
> +}
> +
> +int iris_set_layer_count_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + u32 layer_type = inst->hfi_layer_type;
> + u32 layer_count, layer_count_max;
> +
> + layer_count = (inst->codec == V4L2_PIX_FMT_H264) ?
> + inst->fw_caps[LAYER_COUNT_H264].value :
> + inst->fw_caps[LAYER_COUNT_HEVC].value;
> +
> + if (!layer_count)
> + return -EINVAL;
> +
> + if (layer_type == HFI_HIER_B) {
> + layer_count_max = MAX_LAYER_HB;
> + } else if (layer_type == HFI_HIER_P_HYBRID_LTR) {
> + layer_count_max = MAX_AVC_LAYER_HP_HYBRID_LTR;
> + } else if (layer_type == HFI_HIER_P_SLIDING_WINDOW) {
> + if (inst->codec == V4L2_PIX_FMT_H264) {
> + layer_count_max = MAX_AVC_LAYER_HP_SLIDING_WINDOW;
> + } else {
> + if (inst->hfi_rc_type == HFI_RC_VBR_CFR)
> + layer_count_max = MAX_HEVC_VBR_LAYER_HP_SLIDING_WINDOW;
> + else
> + layer_count_max = MAX_HEVC_LAYER_HP_SLIDING_WINDOW;
> + }
> + } else {
> + return -EINVAL;
> + }
> +
> + if (layer_count > layer_count_max)
> + layer_count = layer_count_max;
> +
> + layer_count += 1; /* base layer */
> + inst->hfi_layer_count = layer_count;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32,
> + &layer_count, sizeof(u32));
> +}
> +
> +int iris_set_layer_bitrate(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + struct vb2_queue *sq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> + struct vb2_queue *dq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + u32 bitrate = inst->fw_caps[cap_id].value;
> +
> + /* ignore layer bitrate when total bitrate is set */
> + if (inst->fw_caps[BITRATE].flags & CAP_FLAG_CLIENT_SET)
> + return 0;
> +
> + if (!(inst->fw_caps[cap_id].flags & CAP_FLAG_CLIENT_SET))
> + return -EINVAL;
> +
> + if (!vb2_is_streaming(sq) && !vb2_is_streaming(dq))
> + return -EINVAL;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32,
> + &bitrate, sizeof(u32));
> +}
> +
> int iris_set_properties(struct iris_inst *inst, u32 plane)
> {
> const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> diff --git a/drivers/media/platform/qcom/iris/iris_ctrls.h b/drivers/media/platform/qcom/iris/iris_ctrls.h
> index 609258c81517b71523b682ca994786cdd020b07f..3c462ec9190be8935176b290588f224fe4f144a4 100644
> --- a/drivers/media/platform/qcom/iris/iris_ctrls.h
> +++ b/drivers/media/platform/qcom/iris/iris_ctrls.h
> @@ -22,7 +22,8 @@ int iris_set_level(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id
> int iris_set_profile_level_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_header_mode_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_header_mode_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> -int iris_set_bitrate(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_bitrate_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_bitrate_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_peak_bitrate(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_bitrate_mode_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_bitrate_mode_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> @@ -42,6 +43,10 @@ int iris_set_use_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_
> int iris_set_mark_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_use_and_mark_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_intra_period(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_layer_type(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_layer_count_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_layer_count_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_layer_bitrate(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_properties(struct iris_inst *inst, u32 plane);
>
> #endif
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> index 87871fed09ed753760b6057ad4afa87be5f91b69..39fc728646d3808c50481ccdfa15ef0dfab05576 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> @@ -604,11 +604,10 @@ iris_hfi_gen1_packet_session_set_property(struct hfi_session_set_property_pkt *p
> break;
> }
> case HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE: {
> - struct hfi_bitrate *brate = prop_data;
> - u32 *in = pdata;
> + struct hfi_bitrate *in = pdata, *brate = prop_data;
>
> - brate->bitrate = *in;
> - brate->layer_id = 0;
> + brate->bitrate = in->bitrate;
> + brate->layer_id = in->layer_id;
> packet->shdr.hdr.size += sizeof(u32) + sizeof(*brate);
> break;
> }
> @@ -728,6 +727,20 @@ iris_hfi_gen1_packet_session_set_property(struct hfi_session_set_property_pkt *p
> packet->shdr.hdr.size += sizeof(u32) + sizeof(*intra_period);
> break;
> }
> + case HFI_PROPERTY_PARAM_VENC_HIER_P_MAX_NUM_ENH_LAYER: {
> + u32 *in = pdata;
> +
> + packet->data[1] = *in;
> + packet->shdr.hdr.size += sizeof(u32) + sizeof(u32);
> + break;
> + }
> + case HFI_PROPERTY_CONFIG_VENC_HIER_P_ENH_LAYER: {
> + u32 *in = pdata;
> +
> + packet->data[1] = *in;
> + packet->shdr.hdr.size += sizeof(u32) + sizeof(u32);
> + break;
> + }
> default:
> return -EINVAL;
> }
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h b/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h
> index 4343661e86065f5623b2c02c7ee808a3c47a8c41..0e4dee19238464a9671a94eaab8eeda2d7f7ca9f 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h
> @@ -154,11 +154,13 @@
>
> #define HFI_PROPERTY_PARAM_VENC_LTRMODE 0x200501c
> #define HFI_PROPERTY_PARAM_VENC_MAX_NUM_B_FRAMES 0x2005020
> +#define HFI_PROPERTY_PARAM_VENC_HIER_P_MAX_NUM_ENH_LAYER 0x2005026
> #define HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE 0x2006001
> #define HFI_PROPERTY_CONFIG_VENC_INTRA_PERIOD 0x2006003
> #define HFI_PROPERTY_CONFIG_VENC_MARKLTRFRAME 0x2006009
> #define HFI_PROPERTY_CONFIG_VENC_USELTRFRAME 0x200600a
> #define HFI_PROPERTY_CONFIG_VENC_SYNC_FRAME_SEQUENCE_HEADER 0x2006008
> +#define HFI_PROPERTY_CONFIG_VENC_HIER_P_ENH_LAYER 0x200600b
>
> struct hfi_pkt_hdr {
> u32 size;
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h b/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
> index aec19efc41a5ef47bbad2471d3c4575704859743..d09096a9d5f934acf072b05c2cf80f3007c3aa7e 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
> @@ -74,7 +74,22 @@ enum hfi_rate_control {
> #define HFI_PROP_LTR_COUNT 0x03000134
> #define HFI_PROP_LTR_MARK 0x03000135
> #define HFI_PROP_LTR_USE 0x03000136
> +
> +enum hfi_layer_encoding_type {
> + HFI_HIER_P_SLIDING_WINDOW = 0x1,
> + HFI_HIER_P_HYBRID_LTR = 0x2,
> + HFI_HIER_B = 0x3,
> +};
> +
> +#define HFI_PROP_LAYER_ENCODING_TYPE 0x03000138
> +#define HFI_PROP_LAYER_COUNT 0x03000139
> #define HFI_PROP_TOTAL_BITRATE 0x0300013b
> +#define HFI_PROP_BITRATE_LAYER1 0x0300013c
> +#define HFI_PROP_BITRATE_LAYER2 0x0300013d
> +#define HFI_PROP_BITRATE_LAYER3 0x0300013e
> +#define HFI_PROP_BITRATE_LAYER4 0x0300013f
> +#define HFI_PROP_BITRATE_LAYER5 0x03000140
> +#define HFI_PROP_BITRATE_LAYER6 0x03000141
> #define HFI_PROP_MAX_GOP_FRAMES 0x03000146
> #define HFI_PROP_MAX_B_FRAMES 0x03000147
> #define HFI_PROP_QUALITY_MODE 0x03000148
> diff --git a/drivers/media/platform/qcom/iris/iris_instance.h b/drivers/media/platform/qcom/iris/iris_instance.h
> index 16965150f427b901778dd5decf10a1379450b2f4..84b939f390d940c01db4b1c56270a123cabca2e3 100644
> --- a/drivers/media/platform/qcom/iris/iris_instance.h
> +++ b/drivers/media/platform/qcom/iris/iris_instance.h
> @@ -74,6 +74,8 @@ struct iris_fmt {
> * @enc_raw_height: source image height for encoder instance
> * @enc_scale_width: scale width for encoder instance
> * @enc_scale_height: scale height for encoder instance
> + * @hfi_layer_type: hierarchical coding layer type
> + * @hfi_layer_count: hierarchical coding layer count
> */
>
> struct iris_inst {
> @@ -116,6 +118,8 @@ struct iris_inst {
> u32 enc_raw_height;
> u32 enc_scale_width;
> u32 enc_scale_height;
> + u32 hfi_layer_type;
> + u32 hfi_layer_count;
> };
>
> #endif
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
> index 67acd98e467df037d49d2ea1830038c0c8fecbaf..3efe3121459c610af55ad2f930b21c376f0a085b 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_common.h
> +++ b/drivers/media/platform/qcom/iris/iris_platform_common.h
> @@ -32,6 +32,12 @@ struct iris_inst;
> #define INVALID_DEFAULT_MARK_OR_USE_LTR -1
> #define MAX_LTR_FRAME_COUNT_GEN1 4
> #define MAX_LTR_FRAME_COUNT_GEN2 2
> +#define MAX_LAYER_HB 3
> +#define MAX_AVC_LAYER_HP_HYBRID_LTR 5
> +#define MAX_AVC_LAYER_HP_SLIDING_WINDOW 3
> +#define MAX_HEVC_LAYER_HP_SLIDING_WINDOW 3
> +#define MAX_HEVC_VBR_LAYER_HP_SLIDING_WINDOW 5
> +#define MAX_HIER_CODING_LAYER_GEN1 6
>
> enum stage_type {
> STAGE_1 = 1,
> @@ -167,6 +173,23 @@ enum platform_inst_fw_cap_type {
> MARK_LTR,
> B_FRAME,
> INTRA_PERIOD,
> + LAYER_ENABLE,
> + LAYER_TYPE_H264,
> + LAYER_TYPE_HEVC,
> + LAYER_COUNT_H264,
> + LAYER_COUNT_HEVC,
> + LAYER0_BITRATE_H264,
> + LAYER1_BITRATE_H264,
> + LAYER2_BITRATE_H264,
> + LAYER3_BITRATE_H264,
> + LAYER4_BITRATE_H264,
> + LAYER5_BITRATE_H264,
> + LAYER0_BITRATE_HEVC,
> + LAYER1_BITRATE_HEVC,
> + LAYER2_BITRATE_HEVC,
> + LAYER3_BITRATE_HEVC,
> + LAYER4_BITRATE_HEVC,
> + LAYER5_BITRATE_HEVC,
> INST_FW_CAP_MAX,
> };
>
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_gen1.c b/drivers/media/platform/qcom/iris/iris_platform_gen1.c
> index e9016609127b83b933a18e44250fd43d25f05959..65156584326a1a83588e8055f1318ba1b62e6510 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_gen1.c
> +++ b/drivers/media/platform/qcom/iris/iris_platform_gen1.c
> @@ -158,7 +158,7 @@ static const struct platform_inst_fw_cap inst_fw_cap_sm8250_enc[] = {
> .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> CAP_FLAG_DYNAMIC_ALLOWED,
> - .set = iris_set_bitrate,
> + .set = iris_set_bitrate_gen1,
> },
> {
> .cap_id = BITRATE_MODE,
> @@ -313,6 +313,98 @@ static const struct platform_inst_fw_cap inst_fw_cap_sm8250_enc[] = {
> .flags = CAP_FLAG_OUTPUT_PORT,
> .set = iris_set_intra_period,
> },
> + {
> + .cap_id = LAYER_ENABLE,
> + .min = 0,
> + .max = 1,
> + .step_or_mask = 1,
> + .value = 0,
> + .flags = CAP_FLAG_OUTPUT_PORT,
> + },
> + {
> + .cap_id = LAYER_TYPE_H264,
> + .min = V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P,
> + .max = V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P,
> + .step_or_mask = BIT(V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P),
> + .value = V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_MENU,
> + },
> + {
> + .cap_id = LAYER_COUNT_H264,
> + .min = 0,
> + .max = MAX_HIER_CODING_LAYER_GEN1,
> + .step_or_mask = 1,
> + .value = 0,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_HIER_P_ENH_LAYER,
> + .flags = CAP_FLAG_OUTPUT_PORT,
> + .set = iris_set_layer_count_gen1,
> + },
> + {
> + .cap_id = LAYER0_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_bitrate_gen1,
> + },
> + {
> + .cap_id = LAYER1_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_bitrate_gen1,
> + },
> + {
> + .cap_id = LAYER2_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_bitrate_gen1,
> + },
> + {
> + .cap_id = LAYER3_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_bitrate_gen1,
> + },
> + {
> + .cap_id = LAYER4_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_bitrate_gen1,
> + },
> + {
> + .cap_id = LAYER5_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_bitrate_gen1,
> + },
> };
>
> static struct platform_inst_caps platform_inst_cap_sm8250 = {
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_gen2.c b/drivers/media/platform/qcom/iris/iris_platform_gen2.c
> index a7ee63e5cbd8b476d765f29ecb3a7d5d52fae269..32e36b547343b5e4dc2bcfb2de57ee3d515cc8ff 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_gen2.c
> +++ b/drivers/media/platform/qcom/iris/iris_platform_gen2.c
> @@ -416,7 +416,7 @@ static const struct platform_inst_fw_cap inst_fw_cap_sm8550_enc[] = {
> .hfi_id = HFI_PROP_TOTAL_BITRATE,
> .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> CAP_FLAG_DYNAMIC_ALLOWED,
> - .set = iris_set_bitrate,
> + .set = iris_set_bitrate_gen2,
> },
> {
> .cap_id = BITRATE_PEAK,
> @@ -780,6 +780,186 @@ static const struct platform_inst_fw_cap inst_fw_cap_sm8550_enc[] = {
> .flags = CAP_FLAG_OUTPUT_PORT,
> .set = iris_set_u32,
> },
> + {
> + .cap_id = LAYER_ENABLE,
> + .min = 0,
> + .max = 1,
> + .step_or_mask = 1,
> + .value = 0,
> + .flags = CAP_FLAG_OUTPUT_PORT,
> + },
> + {
> + .cap_id = LAYER_TYPE_H264,
> + .min = V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B,
> + .max = V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P,
> + .step_or_mask = BIT(V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B) |
> + BIT(V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P),
> + .value = V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P,
> + .hfi_id = HFI_PROP_LAYER_ENCODING_TYPE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_MENU,
no setter for h264 ?
> + },
> + {
> + .cap_id = LAYER_TYPE_HEVC,
> + .min = V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B,
> + .max = V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P,
> + .step_or_mask = BIT(V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B) |
> + BIT(V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P),
> + .value = V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P,
> + .hfi_id = HFI_PROP_LAYER_ENCODING_TYPE,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_MENU,
> + .set = iris_set_layer_type,
> + },
> + {
> + .cap_id = LAYER_COUNT_H264,
> + .min = 0,
> + .max = 5,
> + .step_or_mask = 1,
> + .value = 0,
> + .hfi_id = HFI_PROP_LAYER_COUNT,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_DYNAMIC_ALLOWED,
no setter here ?
> + },
> + {
> + .cap_id = LAYER_COUNT_HEVC,
> + .min = 0,
> + .max = 5,
> + .step_or_mask = 1,
> + .value = 0,
> + .hfi_id = HFI_PROP_LAYER_COUNT,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_count_gen2,
> + },
> + {
> + .cap_id = LAYER0_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER1,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER1_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER2,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER2_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER3,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER3_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER4,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER4_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER5,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER5_BITRATE_H264,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER6,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER0_BITRATE_HEVC,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER1,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER1_BITRATE_HEVC,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER2,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER2_BITRATE_HEVC,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER3,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER3_BITRATE_HEVC,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER4,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER4_BITRATE_HEVC,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER5,
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + },
> + {
> + .cap_id = LAYER5_BITRATE_HEVC,
> + .min = 1,
> + .max = BITRATE_MAX,
> + .step_or_mask = 1,
> + .value = BITRATE_DEFAULT,
> + .hfi_id = HFI_PROP_BITRATE_LAYER5,
HFI_PROP_BITRATE_LAYER6 ?
> + .flags = CAP_FLAG_OUTPUT_PORT | CAP_FLAG_INPUT_PORT |
> + CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_layer_bitrate,
> + }
> };
>
> static struct platform_inst_caps platform_inst_cap_sm8550 = {
> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
> index 0ed82dc2b8af8c789df1b8c10c1a5afc51ef39d8..c2cd4adc082394a9ab6f32a37fe4e57678019d89 100644
> --- a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
> +++ b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
> @@ -936,6 +936,8 @@ static u32 iris_vpu_enc_bin_size(struct iris_inst *inst)
>
> static inline u32 hfi_buffer_get_recon_count(struct iris_inst *inst)
> {
> + u32 layer_count = inst->hfi_layer_count;
> + u32 layer_type = inst->hfi_layer_type;
> u32 bframe_count, ltr_count;
> u32 num_ref = 1;
>
> @@ -945,9 +947,35 @@ static inline u32 hfi_buffer_get_recon_count(struct iris_inst *inst)
> if (bframe_count)
> num_ref = 2;
>
> + /* The shift operation here is rounding logic, similar to [(x+1)/2]. */
> + if (layer_type == HFI_HIER_P_HYBRID_LTR)
> + num_ref = (layer_count + 1) >> 1;
> +
> + if (layer_type == HFI_HIER_P_SLIDING_WINDOW) {
> + if (inst->codec == V4L2_PIX_FMT_HEVC)
> + num_ref = (layer_count + 1) >> 1;
> + else if (inst->codec == V4L2_PIX_FMT_H264 && layer_count < 4)
> + num_ref = (layer_count - 1);
> + else
> + num_ref = layer_count;
> + }
> +
> if (ltr_count)
> num_ref = num_ref + ltr_count;
>
> + /*
> + * The expression (1 << layers - 2) + 1 accounts for the number of reference
> + * frames in the Adaptive Hierarchical B-frame encoding case. In this scheme,
> + * the number of frames in a sub-GOP is related to (2^(number of layers) - 1),
> + * hence the use of the shift operation.
> + */
> + if (layer_type == HFI_HIER_B) {
> + if (inst->codec == V4L2_PIX_FMT_HEVC)
> + num_ref = layer_count;
> + else
> + num_ref = (1 << (layer_count - 2)) + 1;
> + }
> +
> return num_ref;
> }
>
Regards,
Vikash
Powered by blists - more mailing lists