/*
 * Copyright (C) 2013-2016 Intel Corporation. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "vaapiencoder_h264.h"
#include <assert.h>
#include "codecparsers/bitWriter.h"
#include "common/scopedlogger.h"
#include "common/common_def.h"
#include "common/Functional.h"
#include "vaapi/vaapicontext.h"
#include "vaapi/vaapidisplay.h"
#include "vaapicodedbuffer.h"
#include "vaapiencpicture.h"
#include <algorithm>
#include <math.h>

namespace YamiMediaCodec{
//shortcuts
typedef VaapiEncoderH264::PicturePtr PicturePtr;
typedef VaapiEncoderH264::ReferencePtr ReferencePtr;
typedef VaapiEncoderH264::StreamHeaderPtr StreamHeaderPtr;

using YamiParser::BitWriter;
using std::list;
using std::vector;

#define LEVEL51_MAX_MBPS 983040
#define H264_FRAME_FR 172
#define H264_MIN_CR 2
#define H264_NAL_START_CODE 0x000001

#define VAAPI_ENCODER_H264_NAL_REF_IDC_NONE        0
#define VAAPI_ENCODER_H264_NAL_REF_IDC_LOW         1
#define VAAPI_ENCODER_H264_NAL_REF_IDC_MEDIUM      2
#define VAAPI_ENCODER_H264_NAL_REF_IDC_HIGH        3

#define H264_SLICE_TYPE_P 0
#define H264_SLICE_TYPE_B 1
#define H264_SLICE_TYPE_I 2

typedef enum {
    VAAPI_ENCODER_H264_NAL_UNKNOWN = 0,
    VAAPI_ENCODER_H264_NAL_NON_IDR = 1,
    VAAPI_ENCODER_H264_NAL_IDR = 5, /* ref_idc != 0 */
    VAAPI_ENCODER_H264_NAL_SEI = 6, /* ref_idc == 0 */
    VAAPI_ENCODER_H264_NAL_SPS = 7,
    VAAPI_ENCODER_H264_NAL_PPS = 8,
    VAAPI_ENCODER_H264_NAL_PREFIX = 14,
    VAAPI_ENCODER_H264_NAL_SUBSET_SPS = 15
} VaapiEncoderH264NalType;

/* Refer to H.264 spec Table A-1 l Level limits */
struct H264LevelLimits {
    uint32_t levelIdc;
    uint32_t maxMBPS;
    uint32_t minCR;
};

#define SCALABILITY_INFO_PAYLOAD_TYPE 24

static const H264LevelLimits LevelLimits[] = {
    {40, 245760, 4},
    {41, 245760, 2},
    {42, 522240, 2},
    {50, 589824, 2},
    {51, 983040, 2},
};

static inline bool
_poc_greater_than (uint32_t poc1, uint32_t poc2, uint32_t max_poc)
{
    return (((poc1 - poc2) & (max_poc - 1)) < max_poc / 2);
}

/* Get slice_type value for H.264 specification */
static uint8_t
h264_get_slice_type (VaapiPictureType type)
{
    switch (type) {
    case VAAPI_PICTURE_I:
        return 2;
    case VAAPI_PICTURE_P:
        return 0;
    case VAAPI_PICTURE_B:
        return 1;
    default:
        return -1;
    }
    return -1;
}

/* Get log2_max_frame_num value for H.264 specification */
static uint32_t
h264_get_log2_max_frame_num (uint32_t num)
{
    uint32_t ret = 0;

    while (num) {
        ++ret;
        num >>= 1;
    }
    if (ret <= 4)
        ret = 4;
    else if (ret > 10)
        ret = 10;
    /* must be greater than 4 */
    return ret;
}

/* Determines the cpbBrNalFactor based on the supplied profile */
static uint32_t
h264_get_cpb_nal_factor(VideoProfile profile)
{
    uint32_t f;

    /* Table A-2 */
    switch (profile) {
    case PROFILE_H264_HIGH:
        f = 1500;
        break;
    case PROFILE_H264_HIGH10:
        f = 3600;
        break;
    case PROFILE_H264_HIGH422:
    case PROFILE_H264_HIGH444:
        f = 4800;
        break;
    default:
        f = 1200;
        break;
    }
    return f;
}

static uint8_t h264_get_profile_idc(VideoProfile profile)
{
    uint8_t idc;
    switch (profile) {
    case PROFILE_H264_CONSTRAINED_BASELINE:
        idc = 66;
        break;
    case PROFILE_H264_MAIN:
        idc =  77;
        break;
    case PROFILE_H264_HIGH:
        idc = 100;
        break;
    default:
        assert(0);
    }
    return idc;

}

BOOL
bit_writer_put_ue(BitWriter *bitwriter, uint32_t value)
{
    uint32_t  size_in_bits = 0;
    uint32_t  tmp_value = ++value;

    while (tmp_value) {
        ++size_in_bits;
        tmp_value >>= 1;
    }
    if (size_in_bits > 1
        && !bitwriter->writeBits(0, size_in_bits - 1))
        return FALSE;
    if (!bitwriter->writeBits(value, size_in_bits))
        return FALSE;
    return TRUE;
}

BOOL
bit_writer_put_se(BitWriter *bitwriter, int32_t value)
{
    uint32_t new_val;

    if (value <= 0)
        new_val = -(value<<1);
    else
        new_val = (value<<1) - 1;

    if (!bit_writer_put_ue(bitwriter, new_val))
        return FALSE;
    return TRUE;
}


static BOOL
bit_writer_write_nal_header(
    BitWriter *bitwriter,
    uint32_t nal_ref_idc,
    uint32_t nal_unit_type
)
{
    bitwriter->writeBits(0, 1);
    bitwriter->writeBits(nal_ref_idc, 2);
    bitwriter->writeBits(nal_unit_type, 5);
    return TRUE;
}

static BOOL
bit_writer_write_trailing_bits(BitWriter *bitwriter)
{
    bitwriter->writeBits(1, 1);
    bitwriter->writeToBytesAligned();
    return TRUE;
}

static BOOL
bit_writer_write_sei(BitWriter* bitwriter,
    const VAEncSequenceParameterBufferH264* const seq,
    uint32_t temporalLayerNum, const LayerFrameRates& svctFrameRate)
{
    BitWriter scalabilityInfoWriter;
    uint32_t i;

    /* Write scalability_info */
    scalabilityInfoWriter.writeBits(0, 1); // temporal_id_nesting_flag: false
    scalabilityInfoWriter.writeBits(
        0, 1); // priority_layer_info_present_flag: false
    scalabilityInfoWriter.writeBits(0, 1); // priority_id_setting_flag: false
    bit_writer_put_ue(&scalabilityInfoWriter,
                      temporalLayerNum - 1); // num_layers_minus1

    for (i = 0; i < temporalLayerNum; i++) {
        bit_writer_put_ue(&scalabilityInfoWriter, i); // layer_id[i]
        scalabilityInfoWriter.writeBits(0, 6); // priority_id[i]
        scalabilityInfoWriter.writeBits(0, 1); // discardable_flag[i]
        scalabilityInfoWriter.writeBits(0, 3); // dependency_id[i]
        scalabilityInfoWriter.writeBits(0, 4); // quality_id[i]
        scalabilityInfoWriter.writeBits(i, 3); // temporal_id[i]
        scalabilityInfoWriter.writeBits(0, 1); // sub_pic_layer_flag[i]
        scalabilityInfoWriter.writeBits(0, 1); // sub_region_layer_flag[i]
        scalabilityInfoWriter.writeBits(
            0, 1); // iroi_division_info_present_flag[i]
        scalabilityInfoWriter.writeBits(
            0, 1); // profile_level_info_present_flag[i]
        scalabilityInfoWriter.writeBits(0, 1); // bitrate_info_present_flag[i]
        scalabilityInfoWriter.writeBits(1, 1); // frm_rate_info_present_flag[i]
        scalabilityInfoWriter.writeBits(1, 1); // frm_size_info_present_flag[i]
        scalabilityInfoWriter.writeBits(
            0, 1); // layer_dependency_info_present_flag[i]
        scalabilityInfoWriter.writeBits(
            0, 1); // parameter_sets_info_present_flag[i]
        scalabilityInfoWriter.writeBits(
            0, 1); // bitstream_restriction_info_present_flag[i]
        scalabilityInfoWriter.writeBits(0, 1); // exact_interlayer_pred_flag[i]
        scalabilityInfoWriter.writeBits(0, 1); // layer_conversion_flag[i]
        scalabilityInfoWriter.writeBits(0, 1); // layer_output_flag[i]

        scalabilityInfoWriter.writeBits(0, 2); // constant_frm_bitrate_idc[i]
        float layerFps = (1.0 * svctFrameRate[i].frameRateNum) / svctFrameRate[i].frameRateDenom;
        scalabilityInfoWriter.writeBits((int)floor(layerFps * 256 + 0.5),
            16); // avg_frm_rate

        bit_writer_put_ue(&scalabilityInfoWriter,
                          seq->picture_width_in_mbs
                          - 1); // frm_width_in_mbs_minus1
        bit_writer_put_ue(&scalabilityInfoWriter,
                          seq->picture_height_in_mbs
                          - 1); // frm_height_in_mbs_minus1

        bit_writer_put_ue(&scalabilityInfoWriter,
                          0); // layer_dependency_info_src_layer_id_delta[i]
        bit_writer_put_ue(&scalabilityInfoWriter,
                          0); // parameter_sets_info_src_layer_id_delta[i]
    }

    /* rbsp_trailing_bits */
    bit_writer_write_trailing_bits(&scalabilityInfoWriter);

    uint32_t scalabilityInfoBytes = scalabilityInfoWriter.getCodedBitsCount()
                                    / 8;
    uint8_t* scalabilityInfoData = scalabilityInfoWriter.getBitWriterData();
    ASSERT(scalabilityInfoBytes && scalabilityInfoData);

    bit_writer_write_nal_header(bitwriter, VAAPI_ENCODER_H264_NAL_REF_IDC_NONE,
                                VAAPI_ENCODER_H264_NAL_SEI);

    DEBUG("scalabilityInfoBytes is %d", scalabilityInfoBytes);

    bitwriter->writeBits(SCALABILITY_INFO_PAYLOAD_TYPE, 8);
    bitwriter->writeBits(scalabilityInfoBytes, 8);

    for (i = 0; i < scalabilityInfoBytes; i++) {
        bitwriter->writeBits(scalabilityInfoData[i], 8);
    }
    /* rbsp_trailing_bits */
    bit_writer_write_trailing_bits(bitwriter);

    return TRUE;
}

static BOOL
bit_writer_write_sps(BitWriter* bitwriter,
                     const VAEncSequenceParameterBufferH264* const seq,
                     VideoProfile profile)
{
    uint32_t constraint_set0_flag, constraint_set1_flag;
    uint32_t constraint_set2_flag, constraint_set3_flag;
    uint32_t gaps_in_frame_num_value_allowed_flag = 0; // ??
    BOOL nal_hrd_parameters_present_flag;

    uint32_t b_qpprime_y_zero_transform_bypass = 0;
    uint32_t residual_color_transform_flag = 0;
    uint32_t pic_height_in_map_units =
        (seq->seq_fields.bits.frame_mbs_only_flag ?
         seq->picture_height_in_mbs : seq->picture_height_in_mbs/2);
    uint32_t mb_adaptive_frame_field = !seq->seq_fields.bits.frame_mbs_only_flag;
    uint32_t i = 0;

    constraint_set0_flag = 0;
    constraint_set1_flag = profile <= PROFILE_H264_MAIN;
    constraint_set2_flag = 0;
    constraint_set3_flag = 0;

    bit_writer_write_nal_header (bitwriter,
                         VAAPI_ENCODER_H264_NAL_REF_IDC_HIGH, VAAPI_ENCODER_H264_NAL_SPS);
    /* profile_idc */
    bitwriter->writeBits(h264_get_profile_idc(profile), 8);
    /* constraint_set0_flag */
    bitwriter->writeBits(constraint_set0_flag, 1);
    /* constraint_set1_flag */
    bitwriter->writeBits(constraint_set1_flag, 1);
    /* constraint_set2_flag */
    bitwriter->writeBits(constraint_set2_flag, 1);
    /* constraint_set3_flag */
    bitwriter->writeBits(constraint_set3_flag, 1);
    /* reserved_zero_4bits */
    bitwriter->writeBits(0, 4);
    /* level_idc */
    bitwriter->writeBits(seq->level_idc, 8);
    /* seq_parameter_set_id */
    bit_writer_put_ue(bitwriter, seq->seq_parameter_set_id);

    if (profile == PROFILE_H264_HIGH) {
        /* for high profile */
        /* chroma_format_idc  = 1, 4:2:0*/
        bit_writer_put_ue(bitwriter, seq->seq_fields.bits.chroma_format_idc);
        if (3 == seq->seq_fields.bits.chroma_format_idc) {
            bitwriter->writeBits(residual_color_transform_flag, 1);
        }
        /* bit_depth_luma_minus8 */
        bit_writer_put_ue(bitwriter, seq->bit_depth_luma_minus8);
        /* bit_depth_chroma_minus8 */
        bit_writer_put_ue(bitwriter, seq->bit_depth_chroma_minus8);
        /* b_qpprime_y_zero_transform_bypass */
        bitwriter->writeBits(b_qpprime_y_zero_transform_bypass, 1);
        assert(seq->seq_fields.bits.seq_scaling_matrix_present_flag == 0);
        /*seq_scaling_matrix_present_flag  */
        bitwriter->writeBits(seq->seq_fields.bits.seq_scaling_matrix_present_flag, 1);

    #if 0
        if (seq->seq_fields.bits.seq_scaling_matrix_present_flag) {
          for (i = 0; i < (seq->seq_fields.bits.chroma_format_idc != 3 ? 8 : 12); i++) {
            bit_writer_put_bits_uint8(bitwriter, seq->seq_fields.bits.seq_scaling_list_present_flag, 1);
            if (seq->seq_fields.bits.seq_scaling_list_present_flag) {
              assert(0);
              /* FIXME, need write scaling list if seq_scaling_matrix_present_flag ==1*/
            }
          }
        }
    #endif
    }

    /* log2_max_frame_num_minus4 */
    bit_writer_put_ue(bitwriter,
        seq->seq_fields.bits.log2_max_frame_num_minus4);
    /* pic_order_cnt_type */
    bit_writer_put_ue(bitwriter, seq->seq_fields.bits.pic_order_cnt_type);

    if (seq->seq_fields.bits.pic_order_cnt_type == 0) {
        /* log2_max_pic_order_cnt_lsb_minus4 */
        bit_writer_put_ue(bitwriter,
            seq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4);
    } else if (seq->seq_fields.bits.pic_order_cnt_type == 1) {
        assert(0);
        bitwriter->writeBits(seq->seq_fields.bits.delta_pic_order_always_zero_flag, 1);
        bit_writer_put_se(bitwriter, seq->offset_for_non_ref_pic);
        bit_writer_put_se(bitwriter, seq->offset_for_top_to_bottom_field);
        bit_writer_put_ue(bitwriter,
            seq->num_ref_frames_in_pic_order_cnt_cycle);
        for ( i = 0; i < seq->num_ref_frames_in_pic_order_cnt_cycle; i++) {
            bit_writer_put_se(bitwriter, seq->offset_for_ref_frame[i]);
        }
    }

    /* num_ref_frames */
    bit_writer_put_ue(bitwriter, seq->max_num_ref_frames);
    /* gaps_in_frame_num_value_allowed_flag */
    bitwriter->writeBits(gaps_in_frame_num_value_allowed_flag, 1);

    /* pic_width_in_mbs_minus1 */
    bit_writer_put_ue(bitwriter, seq->picture_width_in_mbs - 1);
    /* pic_height_in_map_units_minus1 */
    bit_writer_put_ue(bitwriter, pic_height_in_map_units - 1);
    /* frame_mbs_only_flag */
    bitwriter->writeBits(seq->seq_fields.bits.frame_mbs_only_flag, 1);

    if (!seq->seq_fields.bits.frame_mbs_only_flag) { //ONLY mbs
        assert(0);
        bitwriter->writeBits(mb_adaptive_frame_field, 1);
    }

    /* direct_8x8_inference_flag */
    bitwriter->writeBits(0, 1);
    /* frame_cropping_flag */
    bitwriter->writeBits(seq->frame_cropping_flag, 1);

    if (seq->frame_cropping_flag) {
        /* frame_crop_left_offset */
        bit_writer_put_ue(bitwriter, seq->frame_crop_left_offset);
        /* frame_crop_right_offset */
        bit_writer_put_ue(bitwriter, seq->frame_crop_right_offset);
        /* frame_crop_top_offset */
        bit_writer_put_ue(bitwriter, seq->frame_crop_top_offset);
        /* frame_crop_bottom_offset */
        bit_writer_put_ue(bitwriter, seq->frame_crop_bottom_offset);
    }

    /* vui_parameters_present_flag */
    bitwriter->writeBits(seq->vui_parameters_present_flag, 1);
    if (seq->vui_parameters_present_flag) {
        /* aspect_ratio_info_present_flag */
        bitwriter->writeBits(seq->vui_fields.bits.aspect_ratio_info_present_flag,
                             1);
        if (seq->vui_fields.bits.aspect_ratio_info_present_flag) {
            bitwriter->writeBits(seq->aspect_ratio_idc, 8);
            if (seq->aspect_ratio_idc == 0xFF) {
                bitwriter->writeBits(seq->sar_width, 16);
                bitwriter->writeBits(seq->sar_height, 16);
            }
        }

        /* overscan_info_present_flag */
        bitwriter->writeBits(0, 1);
        /* video_signal_type_present_flag */
        bitwriter->writeBits(0, 1);
        /* chroma_loc_info_present_flag */
        bitwriter->writeBits(0, 1);

        /* timing_info_present_flag */
        bitwriter->writeBits(seq->vui_fields.bits.timing_info_present_flag, 1);
        if (seq->vui_fields.bits.timing_info_present_flag) {
            bitwriter->writeBits(seq->num_units_in_tick, 32);
            bitwriter->writeBits(seq->time_scale, 32);
            bitwriter->writeBits(1, 1); /* fixed_frame_rate_flag */
        }

        nal_hrd_parameters_present_flag = (seq->bits_per_second > 0 ? TRUE : FALSE);
        /* nal_hrd_parameters_present_flag */
        bitwriter->writeBits(nal_hrd_parameters_present_flag, 1);
        if (nal_hrd_parameters_present_flag) {
            /* hrd_parameters */
            /* cpb_cnt_minus1 */
            bit_writer_put_ue(bitwriter, 0);
            bitwriter->writeBits(4, 4); /* bit_rate_scale */
            bitwriter->writeBits(6, 4); /* cpb_size_scale */

            for (i = 0; i < 1; ++i) {
                /* bit_rate_value_minus1[0] */
                bit_writer_put_ue(bitwriter, seq->bits_per_second/1024- 1);
                /* cpb_size_value_minus1[0] */
                bit_writer_put_ue(bitwriter, seq->bits_per_second/1024*8 - 1);
                /* cbr_flag[0] */
                bitwriter->writeBits(1, 1);
            }
            /* initial_cpb_removal_delay_length_minus1 */
            bitwriter->writeBits(23, 5);
            /* cpb_removal_delay_length_minus1 */
            bitwriter->writeBits(23, 5);
            /* dpb_output_delay_length_minus1 */
            bitwriter->writeBits(23, 5);
            /* time_offset_length  */
            bitwriter->writeBits(23, 5);
        }
        /* vcl_hrd_parameters_present_flag */
        bitwriter->writeBits(0, 1);
        if (nal_hrd_parameters_present_flag || 0/*vcl_hrd_parameters_present_flag*/) {
            /* low_delay_hrd_flag */
            bitwriter->writeBits(0, 1);
        }
        /* pic_struct_present_flag */
        bitwriter->writeBits(0, 1);
        /* bitwriter_restriction_flag */
        bitwriter->writeBits(0, 1);
    }

    /* rbsp_trailing_bits */
    bit_writer_write_trailing_bits(bitwriter);
    return TRUE;
}

static BOOL
bit_writer_write_pps(
    BitWriter *bitwriter,
    const VAEncPictureParameterBufferH264* const pic
)
{
    uint32_t num_slice_groups_minus1 = 0;
    uint32_t pic_init_qs_minus26 = 0;
    uint32_t redundant_pic_cnt_present_flag = 0;

    bit_writer_write_nal_header (bitwriter,
                         VAAPI_ENCODER_H264_NAL_REF_IDC_HIGH, VAAPI_ENCODER_H264_NAL_PPS);
    /* pic_parameter_set_id */
    bit_writer_put_ue(bitwriter, pic->pic_parameter_set_id);
    /* seq_parameter_set_id */
    bit_writer_put_ue(bitwriter, pic->seq_parameter_set_id);
    /* entropy_coding_mode_flag */
    bitwriter->writeBits(pic->pic_fields.bits.entropy_coding_mode_flag, 1);
    /* pic_order_present_flag */
    bitwriter->writeBits(pic->pic_fields.bits.pic_order_present_flag, 1);
    /*slice_groups-1*/
    bit_writer_put_ue(bitwriter, num_slice_groups_minus1);

    if (num_slice_groups_minus1 > 0) {
        /*FIXME*/
        assert(0);
    }
    bit_writer_put_ue(bitwriter, pic->num_ref_idx_l0_active_minus1);
    bit_writer_put_ue(bitwriter, pic->num_ref_idx_l1_active_minus1);
    bitwriter->writeBits(pic->pic_fields.bits.weighted_pred_flag, 1);
    bitwriter->writeBits(pic->pic_fields.bits.weighted_bipred_idc, 2);
    /* pic_init_qp_minus26 */
    bit_writer_put_se(bitwriter, pic->pic_init_qp-26);
    /* pic_init_qs_minus26 */
    bit_writer_put_se(bitwriter, pic_init_qs_minus26);
    /*chroma_qp_index_offset*/
    bit_writer_put_se(bitwriter, pic->chroma_qp_index_offset);

    bitwriter->writeBits(pic->pic_fields.bits.deblocking_filter_control_present_flag, 1);
    bitwriter->writeBits(pic->pic_fields.bits.constrained_intra_pred_flag, 1);
    bitwriter->writeBits(redundant_pic_cnt_present_flag, 1);

    /*more_rbsp_data*/
    bitwriter->writeBits(pic->pic_fields.bits.transform_8x8_mode_flag, 1);
    bitwriter->writeBits(pic->pic_fields.bits.pic_scaling_matrix_present_flag, 1);
    if (pic->pic_fields.bits.pic_scaling_matrix_present_flag) {
        assert(0);
        /* FIXME */
        /*
        for (i = 0; i <
            (6+(-( (chroma_format_idc ! = 3) ? 2 : 6) * -pic->pic_fields.bits.transform_8x8_mode_flag));
            i++) {
            bit_writer_put_bits_uint8(bitwriter, pic->pic_fields.bits.pic_scaling_list_present_flag, 1);
        }
        */
    }

    bit_writer_put_se(bitwriter, pic->second_chroma_qp_index_offset);
    bit_writer_write_trailing_bits(bitwriter);

    return TRUE;
}

class VaapiEncStreamHeaderH264
{
    typedef std::vector<uint8_t> Header;
public:
    void setSEI(const VAEncSequenceParameterBufferH264* const seqParam,
        uint32_t temporalLayerNum, const LayerFrameRates& svctFrameRate)
    {
        ASSERT(m_sei.empty());
        BitWriter bs;
        bit_writer_write_sei(&bs, seqParam, temporalLayerNum, svctFrameRate);
        bsToHeader(m_sei, bs);
    }

    void setSPS(const VAEncSequenceParameterBufferH264* const sequence, VideoProfile profile)
    {
        ASSERT(m_sps.empty());
        BitWriter bs;
        bit_writer_write_sps (&bs, sequence, profile);
        bsToHeader(m_sps, bs);
    }

    /*
        void setSubSetSps(const VAEncSequenceParameterBufferH264* const
       sequence, VideoProfile profile)
        {
            ASSERT(m_sps.empty());
            BitWriter bs;
            bit_writer_write_sps (&bs, sequence, profile);
            bit_writer_write_svc_extension (&bs, sequence, profile);
            bit_writer_write_vui_extension (&bs, sequence, profile);
            bit_writer_write_addtional_extension (&bs, sequence, profile);
            bsToHeader(m_sps, bs);
        }
    */
    void addPPS(const VAEncPictureParameterBufferH264* const picParam)
    {
        ASSERT(m_sps.size() && m_pps.empty());
        BitWriter bs;
        bit_writer_write_pps (&bs, picParam);
        bsToHeader(m_pps, bs);
    }

    void generateCodecConfig(bool isAVCc)
    {
        ASSERT(m_sps.size() && (m_sps.size() > 4)&& m_pps.size() && m_headers.empty());
        if (isAVCc)
            generateCodecConfigAVCc();
        else
            generateCodecConfigAnnexB();
    }

    YamiStatus getCodecConfig(VideoEncOutputBuffer* outBuffer)
    {
        ASSERT(outBuffer && ((outBuffer->format == OUTPUT_CODEC_DATA) || (outBuffer->format == OUTPUT_EVERYTHING)));
        if (outBuffer->bufferSize < m_headers.size())
            return YAMI_ENCODE_BUFFER_TOO_SMALL;
        if (m_headers.empty())
            return YAMI_ENCODE_NO_REQUEST_DATA;
        std::copy(m_headers.begin(), m_headers.end(), outBuffer->data);
        outBuffer->dataSize = m_headers.size();
        outBuffer->flag |= ENCODE_BUFFERFLAG_CODECCONFIG;
        return YAMI_SUCCESS;
    }
private:
    static void bsToHeader(Header& param, BitWriter& bs)
    {
        uint64_t codedBits = bs.getCodedBitsCount();
        uint64_t codedBytes = codedBits / 8;
        ASSERT(codedBytes && codedBits % 8 == 0);

        uint8_t* codedData = bs.getBitWriterData();
        ASSERT(codedData);

        param.insert(param.end(), codedData, codedData + codedBytes);
    }

    void appendHeaderWithEmulation(Header& h)
    {
        Header::iterator s = h.begin();
        Header::iterator e;
        uint8_t zeros[] = {0, 0};
        uint8_t emulation[] = {0, 0, 3};
        do {
            e = std::search(s, h.end(), zeros, zeros + N_ELEMENTS(zeros));
            m_headers.insert(m_headers.end(), s, e);
            if (e == h.end())
                break;

            s = e + N_ELEMENTS(zeros);

            /* only when bitstream contains 0x000000/0x000001/0x000002/0x000003
               need to insert emulation prevention byte 0x03 */
            if (*s <= 3)
                m_headers.insert(m_headers.end(), emulation, emulation + N_ELEMENTS(emulation));
            else
                m_headers.insert(m_headers.end(), zeros, zeros + N_ELEMENTS(zeros));
         } while (1);
    }

    void generateCodecConfigAnnexB()
    {
        std::vector<Header*> headers;
        if (m_sei.size())
            headers.push_back(&m_sei);
        headers.push_back(&m_sps);
        headers.push_back(&m_pps);
        uint8_t sync[] = {0, 0, 0, 1};
        for (size_t i = 0; i < headers.size(); i++) {
            m_headers.insert(m_headers.end(), sync, sync + N_ELEMENTS(sync));
            appendHeaderWithEmulation(*headers[i]);
        }
    }

    void generateCodecConfigAVCc()
    {
        const uint32_t configurationVersion = 0x01;
        const uint32_t nalLengthSize = 4;
        uint8_t profileIdc, profileComp, levelIdc;
        BitWriter bs;
        vector<uint8_t>& sps = m_sps;
        vector<uint8_t>& pps = m_pps;
        /* skip sps[0], which is the nal_unit_type */
        profileIdc = sps[1];
        profileComp = sps[2];
        levelIdc = sps[3];
        /* Header */
        bs.writeBits(configurationVersion, 8);
        bs.writeBits(profileIdc, 8);
        bs.writeBits(profileComp, 8);
        bs.writeBits(levelIdc, 8);
        bs.writeBits(0x3f, 6); /* 111111 */
        bs.writeBits(nalLengthSize - 1, 2);
        bs.writeBits(0x07, 3); /* 111 */

        /* Write SPS */
        bs.writeBits(1, 5); /* SPS count = 1 */
        assert(bs.getCodedBitsCount() % 8 == 0);
        bs.writeBits(sps.size(), 16);
        bs.writeBytes(&sps[0], sps.size());
        /* Write PPS */
        bs.writeBits(1, 8); /* PPS count = 1 */
        bs.writeBits(pps.size(), 16);
        bs.writeBytes(&pps[0], pps.size());

        bsToHeader(m_headers, bs);
    }

    Header m_sei;
    Header m_sps;
    Header m_pps;
    Header m_headers;
};

class VaapiEncPictureH264:public VaapiEncPicture
{
    friend class VaapiEncoderH264;
    friend class VaapiEncoderH264Ref;

    typedef std::function<YamiStatus()> Function;

public:
    virtual ~VaapiEncPictureH264() {}

    virtual YamiStatus getOutput(VideoEncOutputBuffer* outBuffer)
    {
        ASSERT(outBuffer);
        VideoOutputFormat format = outBuffer->format;
        //make a local copy of out Buffer;
        VideoEncOutputBuffer out = *outBuffer;
        out.flag = 0;

        std::vector<Function> functions;
        if (format == OUTPUT_CODEC_DATA || ((format == OUTPUT_EVERYTHING) && isIdr()))
            functions.push_back(std::bind(&VaapiEncStreamHeaderH264::getCodecConfig, m_headers,&out));
        if (format == OUTPUT_EVERYTHING || format == OUTPUT_FRAME_DATA)
            functions.push_back(std::bind(getOutputHelper, this, &out));
        YamiStatus ret = getOutput(&out, functions);
        if (ret == YAMI_SUCCESS) {
            outBuffer->dataSize = out.data - outBuffer->data;
            outBuffer->flag = out.flag;
        }
        return ret;
    }

private:
    VaapiEncPictureH264(const ContextPtr& context, const SurfacePtr& surface,
                        int64_t timeStamp)
        : VaapiEncPicture(context, surface, timeStamp)
        , m_frameNum(0)
        , m_poc(0)
        , m_isReference(true)
        , m_priorityId(0)
    {
    }

    bool isIdr() const {
        return m_type == VAAPI_PICTURE_I && !m_frameNum;
    }

    //getOutput is a virutal function, we need this to help bind
    static YamiStatus getOutputHelper(VaapiEncPictureH264* p, VideoEncOutputBuffer* out)
    {
        return p->VaapiEncPicture::getOutput(out);
    }

    YamiStatus getOutput(VideoEncOutputBuffer* outBuffer, std::vector<Function>& functions)
    {
        ASSERT(outBuffer);

        outBuffer->dataSize = 0;

        YamiStatus ret;
        for (size_t i = 0; i < functions.size(); i++) {
            ret = functions[i]();
            if (ret != YAMI_SUCCESS)
                return ret;
            outBuffer->bufferSize -= outBuffer->dataSize;
            outBuffer->data += outBuffer->dataSize;
        }
        return YAMI_SUCCESS;
    }

    uint32_t m_frameNum;
    uint32_t m_poc;
    StreamHeaderPtr m_headers;
    bool m_isReference;
    uint32_t m_priorityId;
};

class VaapiEncoderH264Ref
{
public:
    VaapiEncoderH264Ref(const PicturePtr& picture, const SurfacePtr& surface)
        : m_frameNum(picture->m_frameNum)
        , m_poc(picture->m_poc)
        , m_pic(surface)
        , m_temporalId(picture->m_temporalID)
        , m_diffPicNumMinus1(0)
    {
    }
    uint32_t m_frameNum;
    uint32_t m_poc;
    SurfacePtr m_pic;
    uint32_t m_temporalId;
    uint8_t m_diffPicNumMinus1; // abs_diff_pic_num_minus1

};

VaapiEncoderH264::VaapiEncoderH264()
    : m_numBFrames(0)
    , m_isSvcT(false)
    , m_temporalLayerNum(1)
    , m_reorderState(VAAPI_ENC_REORD_WAIT_FRAMES)
    , m_streamFormat(AVC_STREAM_FORMAT_ANNEXB)
    , m_frameIndex(0)
    , m_keyPeriod(30)
    , m_ppsQp(26)
    , m_idrNum(0)
{
    m_videoParamCommon.profile = VAProfileH264Main;
    m_videoParamCommon.level = 40;
    m_videoParamCommon.rcParams.initQP = 26;
    m_videoParamCommon.rcParams.minQP = 1;

    memset(&m_videoParamAVC, 0, sizeof(m_videoParamAVC));
    m_videoParamAVC.idrInterval = 0;
    m_videoParamAVC.enableCabac = true;
    m_videoParamAVC.enableDct8x8 = false;
    m_videoParamAVC.enableDeblockFilter = true;
    m_videoParamAVC.deblockAlphaOffsetDiv2 = 2;
    m_videoParamAVC.deblockBetaOffsetDiv2 = 2;
    m_videoParamAVC.priorityId = 0;
    m_videoParamAVC.enablePrefixNalUnit = false;
    m_maxOutputBuffer = H264_MIN_TEMPORAL_GOP;
}

VaapiEncoderH264::~VaapiEncoderH264()
{
    FUNC_ENTER();
}

bool VaapiEncoderH264::ensureCodedBufferSize()
{
    AutoLock locker(m_paramLock);
    uint32_t mbSize;

    FUNC_ENTER();

    if (m_maxCodedbufSize)
        return true;

    if (!width() || !height()) {
        return false;
    }

    m_mbWidth = (width() + 15) / 16;
    m_mbHeight = (height() + 15)/ 16;
    //FIXME:
    m_numSlices = 1;
    mbSize = m_mbWidth * m_mbHeight;
    if (m_numSlices > (mbSize + 1) / 2)
        m_numSlices = (mbSize + 1) / 2;
    ASSERT (m_numSlices);

    /* As spec A.3.1, max coded buffer size should be:
     * 384 *( Max( PicSizeInMbs, fR * MaxMBPS ) + MaxMBPS / fps ) ÷ MinCR
     * The max level we support now is 5.1*/
    uint32_t maxMBPS = LEVEL51_MAX_MBPS;
    uint32_t minCR = H264_MIN_CR;
    for (uint32_t i = 0; i < N_ELEMENTS(LevelLimits); i++) {
        if (m_levelIdc <= LevelLimits[i].levelIdc) {
            maxMBPS = LevelLimits[i].maxMBPS;
            minCR = LevelLimits[i].minCR;
            break;
        }
    }
    m_maxCodedbufSize =
        384 * (MAX(mbSize, maxMBPS / H264_FRAME_FR) + maxMBPS / fps()) / minCR;

    DEBUG("m_maxCodedbufSize: %u", m_maxCodedbufSize);

    return true;
}

void VaapiEncoderH264::checkProfileLimitation()
{
    VAProfile& profile = m_videoParamCommon.profile;

    switch (profile) {
    case VAProfileH264ConstrainedBaseline:
        if (ipPeriod() > 1) {
            WARNING("H264 baseline profile can not support B frame encoding");
            m_videoParamCommon.ipPeriod = 1; // without B frame
        }
        assert(m_numBFrames == 0);

        m_videoParamAVC.enableCabac = false; // don't support cabac
        m_videoParamAVC.enableDct8x8 = false; // only high profile can support 8x8 dtc
        break;
    case VAProfileH264Main:
        m_videoParamAVC.enableDct8x8 = false;
        break;
    case VAProfileH264High:
        break;
    default:
        ERROR("unsupported profile");
        assert(0);
    }
}

void VaapiEncoderH264::checkSvcTempLimitaion()
{
    if (m_temporalLayerNum > H264_MAX_TEMPORAL_LAYER_NUM) {
        WARNING("only support %d temporal layers", H264_MAX_TEMPORAL_LAYER_NUM);
        m_temporalLayerNum = H264_MAX_TEMPORAL_LAYER_NUM;
    } else if (m_temporalLayerNum <= 1)
        m_temporalLayerNum = 1;

    if (m_temporalLayerNum > 1) {
        m_isSvcT = true;
        m_videoParamCommon.ipPeriod = 1; // only support IP mode for svc-t

        if (m_videoParamCommon.intraPeriod < H264_MIN_TEMPORAL_GOP)
            m_videoParamCommon.intraPeriod = H264_MIN_TEMPORAL_GOP;

        m_videoParamCommon.intraPeriod
            = 1 << (uint32_t)ceil(log2(intraPeriod())); // make sure Gop is 2^n.
    }

}

void VaapiEncoderH264::resetParams ()
{
    if (m_videoParamCommon.enableLowPower) {
#if VA_CHECK_VERSION(0, 39, 2)
        if (ipPeriod() > 1) {
            WARNING("Low power mode can not support B frame encoding");
            m_videoParamCommon.ipPeriod = 1; // without B frame
        }
        m_entrypoint = VAEntrypointEncSliceLP;
#else
        ERROR("For AVC lowpower mode, please make sure libva version >= 0.39.2");
#endif
    }

    m_levelIdc = level();

    DEBUG("resetParams, ensureCodedBufferSize");
    ensureCodedBufferSize();

    m_temporalLayerNum = m_videoParamCommon.temporalLayers.numLayersMinus1 + 1;

    // enable prefix nal unit for simulcast or svc-t
    if (m_temporalLayerNum > 1 || m_videoParamAVC.priorityId)
        m_videoParamAVC.enablePrefixNalUnit = true;

    checkProfileLimitation();
    checkSvcTempLimitaion();
    if (m_isSvcT) {
        VideoFrameRate frameRate;
        frameRate.frameRateDenom = frameRateDenom();
        frameRate.frameRateNum = frameRateNum();
        m_temporalLayerID.reset(new AvcLayerID(frameRate, m_videoParamCommon.temporalLayerIDs, m_videoParamCommon.temporalLayers.numLayersMinus1));
        m_temporalLayerID->getLayerFrameRates(m_svctFrameRate);
        assert(m_temporalLayerID->getLayerNum() == (m_videoParamCommon.temporalLayers.numLayersMinus1 + 1));
    }

    if (intraPeriod() == 0) {
        ERROR("intra period must larger than 0");
        m_videoParamCommon.intraPeriod = 1;
    }

    if (intraPeriod() <= ipPeriod()) {
        WARNING("intra period is not larger than ip period");
        m_videoParamCommon.ipPeriod = intraPeriod() - 1;
    }

    if (ipPeriod() == 0)
        m_videoParamCommon.intraPeriod = 1;
    else
        m_numBFrames = ipPeriod() - 1;

    m_keyPeriod = intraPeriod() * (m_videoParamAVC.idrInterval + 1);

    if (initQP() < minQP())
        initQP() = minQP();

    if (initQP() > maxQP())
        initQP() = maxQP();

    m_ppsQp = initQP();

    if (m_numBFrames > (intraPeriod() + 1) / 2)
        m_numBFrames = (intraPeriod() + 1) / 2;

    /* init m_maxFrameNum, max_poc */
    m_log2MaxFrameNum =
        h264_get_log2_max_frame_num (m_keyPeriod);
    assert (m_log2MaxFrameNum >= 4);
    m_maxFrameNum = (1 << m_log2MaxFrameNum);
    m_log2MaxPicOrderCnt = m_log2MaxFrameNum + 1;
    m_maxPicOrderCnt = (1 << m_log2MaxPicOrderCnt);

    m_maxRefList1Count = m_numBFrames > 0;//m_maxRefList1Count <=1, because of currenent order mechanism
    m_maxRefList0Count = numRefFrames();
    if (m_maxRefList0Count >= m_maxOutputBuffer -1)
        m_maxRefList0Count = m_maxOutputBuffer -1;

    m_maxRefFrames =
        m_maxRefList0Count + m_maxRefList1Count;
    if (m_isSvcT) {
        uint32_t refFrameNum = m_temporalLayerID->getMiniRefFrameNum();
        if (refFrameNum > m_maxOutputBuffer) {
            ERROR("Reference frame number %d > output buffer %d", refFrameNum, m_maxOutputBuffer);
            assert(false);
        }
        if (m_maxRefFrames < refFrameNum)
            m_maxRefFrames = refFrameNum;
    }

    assert((uint32_t)(1 << (m_temporalLayerNum - 1)) <= m_maxOutputBuffer);
    CLIP(m_maxRefFrames, (uint32_t)(1 << (m_temporalLayerNum - 1)), m_maxOutputBuffer);
    INFO("m_maxRefFrames: %d", m_maxRefFrames);

    resetGopStart();
}

YamiStatus VaapiEncoderH264::getMaxOutSize(uint32_t* maxSize)
{
    FUNC_ENTER();

    if (ensureCodedBufferSize())
        *maxSize = m_maxCodedbufSize;
    else
        *maxSize = 0;

    return YAMI_SUCCESS;
}

#ifdef __BUILD_GET_MV__
YamiStatus VaapiEncoderH264::getMVBufferSize(uint32_t* Size)
{
    FUNC_ENTER();
    *Size = sizeof(VAMotionVectorIntel)*16*m_mbWidth*m_mbHeight;
    return YAMI_SUCCESS;
}
#endif

YamiStatus VaapiEncoderH264::start()
{
    FUNC_ENTER();
    resetParams();
    return VaapiEncoderBase::start();
}

void VaapiEncoderH264::flush()
{
    YamiStatus ret;

    FUNC_ENTER();

    if (!m_reorderFrameList.empty()) {
        changeLastBFrameToPFrame();
        m_reorderState = VAAPI_ENC_REORD_DUMP_FRAMES;

        ret = encodeAllFrames();
        if (ret != YAMI_SUCCESS) {
            ERROR("Not all frames are flushed.");
        }
    }

    resetGopStart();
    m_reorderFrameList.clear();
    referenceListFree();

    VaapiEncoderBase::flush();
}

YamiStatus VaapiEncoderH264::stop()
{
    flush();
    return VaapiEncoderBase::stop();
}

YamiStatus VaapiEncoderH264::setParameters(VideoParamConfigType type, Yami_PTR videoEncParams)
{
    YamiStatus status = YAMI_INVALID_PARAM;
    AutoLock locker(m_paramLock);

    FUNC_ENTER();
    if (!videoEncParams)
        return YAMI_INVALID_PARAM;
    switch (type) {
    case VideoParamsTypeAVC: {
            VideoParamsAVC* avc = (VideoParamsAVC*)videoEncParams;
            if (avc->size == sizeof(VideoParamsAVC)) {
                PARAMETER_ASSIGN(m_videoParamAVC, *avc);
                status = YAMI_SUCCESS;
            }
        }
        break;
    case VideoConfigTypeAVCStreamFormat: {
            VideoConfigAVCStreamFormat* format = (VideoConfigAVCStreamFormat*)videoEncParams;
            if (format->size == sizeof(VideoConfigAVCStreamFormat)) {
                m_streamFormat = format->streamFormat;
                status = YAMI_SUCCESS;
            }
        }
        break;
    default:
        status = VaapiEncoderBase::setParameters(type, videoEncParams);
        break;
    }
    return status;
}

YamiStatus VaapiEncoderH264::getParameters(VideoParamConfigType type, Yami_PTR videoEncParams)
{
    YamiStatus status = YAMI_INVALID_PARAM;
    AutoLock locker(m_paramLock);

    FUNC_ENTER();
    if (!videoEncParams)
        return status;
    switch (type) {
    case VideoParamsTypeAVC: {
            VideoParamsAVC* avc = (VideoParamsAVC*)videoEncParams;
            if (avc->size == sizeof(VideoParamsAVC)) {
                PARAMETER_ASSIGN(*avc, m_videoParamAVC);
                status = YAMI_SUCCESS;
            }
        }
        break;
    case VideoConfigTypeAVCStreamFormat: {
            VideoConfigAVCStreamFormat* format = (VideoConfigAVCStreamFormat*)videoEncParams;
            if (format->size == sizeof(VideoConfigAVCStreamFormat)) {
                format->streamFormat = m_streamFormat;
                status = YAMI_SUCCESS;
            }
        }
        break;
    default:
        status = VaapiEncoderBase::getParameters(type, videoEncParams);
        break;
    }

    // TODO, update video resolution basing on hw requirement
    status = VaapiEncoderBase::getParameters(type, videoEncParams);

    return status;
}

void VaapiEncoderH264::changeLastBFrameToPFrame()
{
    PicturePtr lastPic = m_reorderFrameList.back();
    if (lastPic->m_type == VAAPI_PICTURE_B) {
        lastPic->m_type = VAAPI_PICTURE_P;
        m_reorderFrameList.pop_back();
        m_reorderFrameList.push_front(lastPic);
    }
}

YamiStatus VaapiEncoderH264::reorder(const SurfacePtr& surface, uint64_t timeStamp, bool forceKeyFrame)
{
    if (!surface)
        return YAMI_INVALID_PARAM;

    PicturePtr picture(new VaapiEncPictureH264(m_context, surface, timeStamp));

    bool isIdr = (m_frameIndex == 0 ||m_frameIndex >= m_keyPeriod || forceKeyFrame);

    if (isIdr) {
        // If the last frame before IDR is B frame, set it to P frame.
        if (m_reorderFrameList.size()) {
            changeLastBFrameToPFrame();
        }
        setIdrFrame (picture);
        m_reorderFrameList.push_back(picture);
        m_curFrameNum++;
        m_reorderState = VAAPI_ENC_REORD_DUMP_FRAMES;
    } else if (m_frameIndex % intraPeriod() == 0) {
        setIFrame (picture);
        m_reorderFrameList.push_front(picture);
        m_curFrameNum++;
        m_reorderState = VAAPI_ENC_REORD_DUMP_FRAMES;
    }else if (m_frameIndex % (m_numBFrames + 1) != 0) {
        setBFrame (picture);
        m_reorderFrameList.push_back(picture);
    } else {
        setPFrame (picture);
        m_reorderFrameList.push_front(picture);
        m_curFrameNum++;
        m_reorderState = VAAPI_ENC_REORD_DUMP_FRAMES;
    }

    picture->m_poc = m_frameIndex * 2;
    picture->m_priorityId = m_videoParamAVC.priorityId;
    if (m_isSvcT)
        picture->m_temporalID = m_temporalLayerID->getTemporalLayer(m_frameIndex);
    else
        picture->m_temporalID = 0;
    DEBUG("m_temporalID is %d", picture->m_temporalID);
    m_frameIndex++;
    return YAMI_SUCCESS;
}

YamiStatus VaapiEncoderH264::encodeAllFrames()
{
    FUNC_ENTER();
    YamiStatus ret;

    while (m_reorderState == VAAPI_ENC_REORD_DUMP_FRAMES) {
        if (!m_maxCodedbufSize)
            ensureCodedBufferSize();
        CodedBufferPtr codedBuffer = VaapiCodedBuffer::create(m_context, m_maxCodedbufSize);
        if (!codedBuffer)
            return YAMI_OUT_MEMORY;
        PicturePtr picture = m_reorderFrameList.front();
        m_reorderFrameList.pop_front();
        picture->m_codedBuffer = codedBuffer;

        if (m_reorderFrameList.empty())
            m_reorderState = VAAPI_ENC_REORD_WAIT_FRAMES;

        ret =  encodePicture(picture);
        if (ret != YAMI_SUCCESS) {
            return ret;
        }
        codedBuffer->setFlag(ENCODE_BUFFERFLAG_ENDOFFRAME);
        INFO("picture->m_type: 0x%x\n", picture->m_type);
        if (picture->isIdr()) {
            codedBuffer->setFlag(ENCODE_BUFFERFLAG_SYNCFRAME);
        }

        if (!output(picture))
            return YAMI_INVALID_PARAM;
    }

    INFO();
    return YAMI_SUCCESS;
}

// calls immediately after reorder,
// it makes sure I frame are encoded immediately, so P frames can be pushed to the front of the m_reorderFrameList.
// it also makes sure input thread and output thread runs in parallel
YamiStatus VaapiEncoderH264::doEncode(const SurfacePtr& surface, uint64_t timeStamp, bool forceKeyFrame)
{
    FUNC_ENTER();
    YamiStatus ret;
    ret = reorder(surface, timeStamp, forceKeyFrame);
    if (ret != YAMI_SUCCESS)
        return ret;

    ret = encodeAllFrames();
    if (ret != YAMI_SUCCESS) {
        return ret;
    }
    return YAMI_SUCCESS;
}

YamiStatus VaapiEncoderH264::getCodecConfig(VideoEncOutputBuffer* outBuffer)
{
    if (!outBuffer) {
        return YAMI_INVALID_PARAM;
    }

    ASSERT((outBuffer->flag == OUTPUT_CODEC_DATA) || outBuffer->flag == OUTPUT_EVERYTHING);
    AutoLock locker(m_paramLock);
    if (!m_headers)
        return YAMI_ENCODE_NO_REQUEST_DATA;
    return m_headers->getCodecConfig(outBuffer);
}

#if VA_CHECK_VERSION(0, 39, 4)
void VaapiEncoderH264::fill(
    VAEncMiscParameterTemporalLayerStructure* layerParam) const
{
    LayerIDs ids;
    m_temporalLayerID->getLayerIds(ids);
    layerParam->number_of_layers = m_temporalLayerNum;
    layerParam->periodicity = ids.size();

    for (uint32_t i = 0; i < layerParam->periodicity; i++)
        layerParam->layer_id[i] = ids[(i + 1) % layerParam->periodicity];
}
#endif

/* Generates additional control parameters */
bool VaapiEncoderH264::ensureMiscParams(VaapiEncPicture* picture)
{
    VideoRateControl mode = rateControlMode();
    if (mode == RATE_CONTROL_CBR || mode == RATE_CONTROL_VBR) {
#if VA_CHECK_VERSION(0, 39, 4)
        if (m_isSvcT) {
            VAEncMiscParameterTemporalLayerStructure* layerParam = NULL;
            if (!picture->newMisc(VAEncMiscParameterTypeTemporalLayerStructure,
                                  layerParam))
                return false;
            if (layerParam)
                fill(layerParam);
        }
#endif
    }

    if (!VaapiEncoderBase::ensureMiscParams(picture))
        return false;

    return true;
}

/* Handle new GOP starts */
void VaapiEncoderH264::resetGopStart ()
{
    m_frameIndex = 0;
    m_curFrameNum = 0;
}

/* Marks the supplied picture as a B-frame */
void VaapiEncoderH264::setBFrame (const PicturePtr& pic)
{
    pic->m_type = VAAPI_PICTURE_B;
    pic->m_frameNum = (m_curFrameNum % m_maxFrameNum);
}

/* Marks the supplied picture as a P-frame */
void VaapiEncoderH264::setPFrame (const PicturePtr& pic)
{
    pic->m_type = VAAPI_PICTURE_P;
    pic->m_frameNum = (m_curFrameNum % m_maxFrameNum);
}

/* Marks the supplied picture as an I-frame */
void VaapiEncoderH264::setIFrame (const PicturePtr& pic)
{
    pic->m_type = VAAPI_PICTURE_I;
    pic->m_frameNum = (m_curFrameNum % m_maxFrameNum);
}

/* Marks the supplied picture as an IDR frame */
void VaapiEncoderH264::setIdrFrame (const PicturePtr& pic)
{
    resetGopStart();
    pic->m_type = VAAPI_PICTURE_I;
    pic->m_frameNum = 0;
    pic->m_poc = 0;
    m_idrNum++;
}

bool VaapiEncoderH264::
referenceListUpdate (const PicturePtr& picture, const SurfacePtr& surface)
{
    if (VAAPI_PICTURE_B == picture->m_type) {
        return true;
    }
    if (picture->isIdr()) {
        m_refList.clear();
    } else if (m_refList.size() >= m_maxRefFrames) {
        m_refList.pop_back();
    }
    ReferencePtr ref(new VaapiEncoderH264Ref(picture, surface));
    m_refList.push_front(ref); // descending order for short-term reference list
    assert (m_refList.size() <= m_maxRefFrames);
    return true;
}

bool  VaapiEncoderH264::pictureReferenceListSet (
    const PicturePtr& picture)
{
    uint32_t i;

    /* reset reflist0 and reflist1 every time  */
    m_refList0.clear();
    m_refList1.clear();

    if (picture->m_type == VAAPI_PICTURE_I)
        return true;

    for (i = 0; i < m_refList.size(); i++) {
        assert(picture->m_poc != m_refList[i]->m_poc);
        if (picture->m_temporalID >= m_refList[i]->m_temporalId) {
            m_refList[i]->m_diffPicNumMinus1 =
                picture->m_frameNum - m_refList[i]->m_frameNum - 1;
            if (picture->m_poc > m_refList[i]->m_poc) {
                m_refList0.push_back(m_refList[i]);/* set forward reflist: descending order */
            } else
                m_refList1.push_front(m_refList[i]);/* set backward reflist: ascending order */
        }
    }

    if (m_refList0.size() > m_maxRefList0Count)
        m_refList0.resize(m_maxRefList0Count);
    if (m_refList1.size() > m_maxRefList1Count)
        m_refList1.resize(m_maxRefList1Count);

    if (picture->m_type == VAAPI_PICTURE_P)
        assert(m_refList1.empty());

    DEBUG("pictureReferenceListSet, m_refList0_size is %d",
          (int32_t)m_refList0.size());

    assert (m_refList0.size() + m_refList1.size() <= m_maxRefFrames);

    return true;
}

void VaapiEncoderH264::referenceListFree()
{
    m_refList.clear();
    m_refList0.clear();
    m_refList1.clear();
}

bool VaapiEncoderH264::fill(VAEncSequenceParameterBufferH264* seqParam) const
{
    seqParam->seq_parameter_set_id = 0;
    seqParam->level_idc = m_levelIdc;
    seqParam->intra_period = intraPeriod();
    seqParam->intra_idr_period = seqParam->intra_period;
    seqParam->ip_period = 1 + m_numBFrames;
    seqParam->bits_per_second = bitRate();

    seqParam->max_num_ref_frames = m_maxRefFrames;
    seqParam->picture_width_in_mbs = m_mbWidth;
    seqParam->picture_height_in_mbs = m_mbHeight;

    /*sequence field values */
    seqParam->seq_fields.value = 0;
    seqParam->seq_fields.bits.chroma_format_idc = 1;
    seqParam->seq_fields.bits.frame_mbs_only_flag = 1;
    assert (m_log2MaxFrameNum >= 4);
    seqParam->seq_fields.bits.log2_max_frame_num_minus4 =
        m_log2MaxFrameNum - 4;
    /* picture order count */
    seqParam->seq_fields.bits.pic_order_cnt_type = 0;
    assert (m_log2MaxPicOrderCnt >= 4);
    seqParam->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 =
        m_log2MaxPicOrderCnt - 4;


    /* not used if pic_order_cnt_type == 0 */
    if (seqParam->seq_fields.bits.pic_order_cnt_type == 1) {
        seqParam->seq_fields.bits.delta_pic_order_always_zero_flag = TRUE;
    }

    /* frame_cropping_flag */
    const int cropRight = (16 * m_mbWidth - width());
    const int cropBottom = (16 * m_mbHeight - height());
    if (cropRight || cropBottom) {
        const int CHROMA_420 = 1;
        const int CHROMA_422 = 2;
        int chroma = seqParam->seq_fields.bits.chroma_format_idc;
        static const uint32_t subWidthC = (chroma == CHROMA_420 || chroma == CHROMA_422) ? 2 : 1;
        static const uint32_t subHeightC = chroma == CHROMA_420 ? 2 : 1;
        const uint32_t cropUnitX = subWidthC;
        const uint32_t cropUnitY = subHeightC * (2 - seqParam->seq_fields.bits.frame_mbs_only_flag);

        seqParam->frame_cropping_flag = 1;
        seqParam->frame_crop_right_offset = cropRight / cropUnitX;
        seqParam->frame_crop_bottom_offset = cropBottom / cropUnitY;
    }

    /* VUI parameters are always set, at least for timing_info (framerate) */
    seqParam->vui_parameters_present_flag = TRUE;
    if (seqParam->vui_parameters_present_flag) {
        seqParam->vui_fields.bits.aspect_ratio_info_present_flag = FALSE;
        seqParam->vui_fields.bits.bitstream_restriction_flag = FALSE;
        seqParam->vui_fields.bits.timing_info_present_flag = TRUE;
        if (seqParam->vui_fields.bits.timing_info_present_flag) {
            seqParam->num_units_in_tick = frameRateDenom();
            seqParam->time_scale = frameRateNum() * 2;
        }
    }
    return true;
}

/* Fills in VA picture parameter buffer */
bool VaapiEncoderH264::fill(VAEncPictureParameterBufferH264* picParam, const PicturePtr& picture,
                            const SurfacePtr& surface) const
{
    uint32_t i = 0;

    /* reference list,  */
    picParam->CurrPic.picture_id = surface->getID();
    picParam->CurrPic.TopFieldOrderCnt = picture->m_poc;

    if (picture->m_type != VAAPI_PICTURE_I) {
        for (i = 0; i < m_refList.size(); i++) {
            picParam->ReferenceFrames[i].picture_id = m_refList[i]->m_pic->getID();
            picParam->ReferenceFrames[i].TopFieldOrderCnt = m_refList[i]->m_poc;
            picParam->ReferenceFrames[i].flags |= VA_PICTURE_H264_SHORT_TERM_REFERENCE;
        }
    }

    for (; i < 16; ++i) {
        picParam->ReferenceFrames[i].picture_id = VA_INVALID_ID;
    }
    picParam->coded_buf = picture->m_codedBuffer->getID();

    picParam->pic_parameter_set_id = 0;
    picParam->seq_parameter_set_id = 0;
    picParam->last_picture = 0;  /* means last encoding picture */
    picParam->frame_num = picture->m_frameNum;
    picParam->pic_init_qp = m_ppsQp;
    picParam->num_ref_idx_l0_active_minus1 =
        (m_maxRefList0Count ? (m_maxRefList0Count - 1) : 0);
    picParam->num_ref_idx_l1_active_minus1 =
        (m_maxRefList1Count ? (m_maxRefList1Count - 1) : 0);
    picParam->chroma_qp_index_offset = 0;
    picParam->second_chroma_qp_index_offset = 0;

    /* set picture fields */
    picParam->pic_fields.bits.idr_pic_flag = picture->isIdr();
    picParam->pic_fields.bits.reference_pic_flag = picture->m_isReference
        = (picture->m_type != VAAPI_PICTURE_B);
    picParam->pic_fields.bits.entropy_coding_mode_flag = m_videoParamAVC.enableCabac;
    picParam->pic_fields.bits.transform_8x8_mode_flag = m_videoParamAVC.enableDct8x8;
    picParam->pic_fields.bits.deblocking_filter_control_present_flag = true;

    return TRUE;
}

bool VaapiEncoderH264::ensureSequenceHeader(const PicturePtr& picture,const VAEncSequenceParameterBufferH264* const sequence)
{
    m_headers.reset(new VaapiEncStreamHeaderH264());
    if (m_isSvcT)
        m_headers->setSEI(sequence, m_temporalLayerNum, m_svctFrameRate);
    m_headers->setSPS(sequence, profile());
    return true;
}

bool VaapiEncoderH264::ensurePictureHeader(const PicturePtr& picture, const VAEncPictureParameterBufferH264* const picParam)
{
    m_headers->addPPS(picParam);
    m_headers->generateCodecConfig(m_streamFormat == AVC_STREAM_FORMAT_AVCC);
    picture->m_headers = m_headers;
    return true;
}

bool VaapiEncoderH264::fillReferenceList(VAEncSliceParameterBufferH264* slice) const
{
    uint32_t i = 0;
    for (i = 0; i < m_refList0.size(); i++) {
        assert(m_refList0[i] && m_refList0[i]->m_pic && (m_refList0[i]->m_pic->getID() != VA_INVALID_ID));
        slice->RefPicList0[i].picture_id = m_refList0[i]->m_pic->getID();
        slice->RefPicList0[i].TopFieldOrderCnt= m_refList0[i]->m_poc;
        slice->RefPicList0[i].flags |= VA_PICTURE_H264_SHORT_TERM_REFERENCE;
    }
    for (; i < N_ELEMENTS(slice->RefPicList0); i++)
        slice->RefPicList0[i].picture_id = VA_INVALID_SURFACE;

    for (i = 0; i < m_refList1.size(); i++){
        assert(m_refList1[i] && m_refList1[i]->m_pic && (m_refList1[i]->m_pic->getID() != VA_INVALID_ID));
        slice->RefPicList1[i].picture_id = m_refList1[i]->m_pic->getID();
        slice->RefPicList1[i].TopFieldOrderCnt= m_refList1[i]->m_poc;
        slice->RefPicList1[i].flags |= VA_PICTURE_H264_SHORT_TERM_REFERENCE;
    }
    for (; i < N_ELEMENTS(slice->RefPicList1); i++)
        slice->RefPicList1[i].picture_id = VA_INVALID_SURFACE;
    return true;
}

bool VaapiEncoderH264::addPackedPrefixNalUnit(const PicturePtr& picture) const
{
    bool ret = true;
    BitWriter bs;
    bs.writeBits(H264_NAL_START_CODE, 32);
    bit_writer_write_nal_header(&bs, picture->m_isReference
                                         ? VAAPI_ENCODER_H264_NAL_REF_IDC_LOW
                                         : VAAPI_ENCODER_H264_NAL_REF_IDC_NONE,
                                VAAPI_ENCODER_H264_NAL_PREFIX);

    bs.writeBits(1, 1); /* svc_extension_flag */
    bs.writeBits(picture->isIdr(), 1);
    bs.writeBits(picture->m_priorityId, 6);
    bs.writeBits(1, 1); /* no_inter_layer_pred_flag */
    bs.writeBits(0, 3); /* dependency_id */
    bs.writeBits(0, 4); /* quality_id */
    bs.writeBits(picture->m_temporalID, 3);
    bs.writeBits(0, 1); /* use_ref_base_pic_flag */
    bs.writeBits(1, 1); /* discardable_flag */
    bs.writeBits(1, 1); /* output_flag */
    bs.writeBits(3, 2); /* reserved_three_2bits */

    if (picture->m_isReference) {
        bs.writeBits(0, 1); /* store_ref_base_pic_flag */
        bs.writeBits(0, 1); /* additional_prefix_nal_unit_extension_flag*/
    }
    /* no more rbsp data */

    bit_writer_write_trailing_bits(&bs);

    uint32_t codedBits = bs.getCodedBitsCount();
    uint8_t* codedData = bs.getBitWriterData();
    ASSERT(codedData && codedBits);

    if (!picture->addPackedHeader(VAEncPackedHeaderRawData, codedData,
                                  codedBits)) {
        ret = false;
    }

    return ret;
}

bool VaapiEncoderH264::addPackedSliceHeader(
    const PicturePtr& picture,
    const VAEncSliceParameterBufferH264* const sliceParam) const
{
    bool ret = true;
    uint32_t i = 0;
    BitWriter bs;
    bs.writeBits(H264_NAL_START_CODE, 32);

    if (sliceParam->slice_type == H264_SLICE_TYPE_I) {
        bit_writer_write_nal_header(&bs, VAAPI_ENCODER_H264_NAL_REF_IDC_HIGH,
                                    picture->isIdr()
                                        ? VAAPI_ENCODER_H264_NAL_IDR
                                        : VAAPI_ENCODER_H264_NAL_NON_IDR);
    } else if (sliceParam->slice_type == H264_SLICE_TYPE_P) {
        bit_writer_write_nal_header(&bs, VAAPI_ENCODER_H264_NAL_REF_IDC_MEDIUM,
                                    VAAPI_ENCODER_H264_NAL_NON_IDR);
    } else {
        assert(sliceParam->slice_type == H264_SLICE_TYPE_B);
        bit_writer_write_nal_header(
            &bs, picture->m_isReference ? VAAPI_ENCODER_H264_NAL_REF_IDC_LOW
                                        : VAAPI_ENCODER_H264_NAL_REF_IDC_NONE,
            VAAPI_ENCODER_H264_NAL_NON_IDR);
    }

    bit_writer_put_ue(&bs,
                      sliceParam->macroblock_address); /* first_mb_in_slice*/
    bit_writer_put_ue(&bs, sliceParam->slice_type); /* slice_type */

    bit_writer_put_ue(
        &bs, sliceParam->pic_parameter_set_id); /* pic_parameter_set_id: 0 */
    bs.writeBits(m_picParam->frame_num,
                 m_seqParam->seq_fields.bits.log2_max_frame_num_minus4
                 + 4); /* frame_num */

    /* frame_mbs_only_flag == 1 */
    if (!m_seqParam->seq_fields.bits.frame_mbs_only_flag) {
        ERROR("interlace unsupported");
        return false;
    }

    if (m_picParam->pic_fields.bits.idr_pic_flag)
        bit_writer_put_ue(&bs, sliceParam->idr_pic_id); /* idr_pic_id: 0 */

    if (m_seqParam->seq_fields.bits.pic_order_cnt_type == 0) {
        bs.writeBits(
            m_picParam->CurrPic.TopFieldOrderCnt,
            m_seqParam->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 + 4);
        /* pic_order_present_flag == 0 */
    } else {
        ERROR("POC type unsupported");
        return false;
    }

    /* slice type */
    if (sliceParam->slice_type == H264_SLICE_TYPE_P) {
        bs.writeBits(sliceParam->num_ref_idx_active_override_flag,
                     1); /* num_ref_idx_active_override_flag: */

        if (sliceParam->num_ref_idx_active_override_flag)
            bit_writer_put_ue(&bs, sliceParam->num_ref_idx_l0_active_minus1);

        bool refPicListModificationFlagL0 = false;
        /* ref_pic_list_reordering */
        for (i = 0; i < m_refList0.size(); i++) {
            if (m_refList0[i]->m_diffPicNumMinus1) {
                DEBUG("m_diffPicNumMinus1 is %d",
                      m_refList0[i]->m_diffPicNumMinus1);
                refPicListModificationFlagL0 = true;
                break;
            }
        }

        bs.writeBits(refPicListModificationFlagL0,
                     1); /* ref_pic_list_reordering_flag_l0*/

        if (refPicListModificationFlagL0) {
            DEBUG("m_refList0_size is %d", (int32_t)m_refList0.size());
            for (i = 0; i < m_refList0.size(); i++) {
                bit_writer_put_ue(&bs, 0); /* modification_of_pic_nums_idc: 0 */
                bit_writer_put_ue(
                    &bs,
                    m_refList0[i]
                        ->m_diffPicNumMinus1); /* abs_diff_pic_num_minus1 */
            }
            bit_writer_put_ue(&bs, 3); /* modification_of_pic_nums_idc: 3 */
        }
    } else if (sliceParam->slice_type == H264_SLICE_TYPE_B) {
        bs.writeBits(sliceParam->direct_spatial_mv_pred_flag,
                     1); /* direct_spatial_mv_pred: 1 */

        bs.writeBits(sliceParam->num_ref_idx_active_override_flag,
                     1); /* num_ref_idx_active_override_flag: */

        if (sliceParam->num_ref_idx_active_override_flag) {
            bit_writer_put_ue(&bs, sliceParam->num_ref_idx_l0_active_minus1);
            bit_writer_put_ue(&bs, sliceParam->num_ref_idx_l1_active_minus1);
        }

        /* ref_pic_list_reordering */
        bs.writeBits(0, 1); /* ref_pic_list_reordering_flag_l0: 0 */
        bs.writeBits(0, 1); /* ref_pic_list_reordering_flag_l1: 0 */
    }

    if ((m_picParam->pic_fields.bits.weighted_pred_flag
         && sliceParam->slice_type == H264_SLICE_TYPE_P)
        || ((m_picParam->pic_fields.bits.weighted_bipred_idc == 1)
            && sliceParam->slice_type == H264_SLICE_TYPE_B)) {
        /* FIXME: fill weight/offset table */
        ERROR("don't support weighted prediction");
        return false;
    }

    /* dec_ref_pic_marking */
    if (m_picParam->pic_fields.bits.reference_pic_flag) { /* nal_ref_idc != 0 */
        if (m_picParam->pic_fields.bits.idr_pic_flag) {
            bs.writeBits(0, 1); /* no_output_of_prior_pics_flag: 0 */
            bs.writeBits(0, 1); /* long_term_reference_flag: 0 */
        } else {
            bs.writeBits(0, 1); /* adaptive_ref_pic_marking_mode_flag: 0 */
        }
    }

    if (m_picParam->pic_fields.bits.entropy_coding_mode_flag
        && (sliceParam->slice_type != H264_SLICE_TYPE_I))
        bit_writer_put_ue(&bs,
                          sliceParam->cabac_init_idc); /* cabac_init_idc: 0 */

    bit_writer_put_se(&bs, sliceParam->slice_qp_delta); /* slice_qp_delta: 0 */

    /* ignore for SP/SI */

    if (m_picParam->pic_fields.bits.deblocking_filter_control_present_flag) {
        bit_writer_put_ue(
            &bs,
            sliceParam
                ->disable_deblocking_filter_idc); /* disable_deblocking_filter_idc:
                                                     0 */

        if (sliceParam->disable_deblocking_filter_idc != 1) {
            bit_writer_put_se(
                &bs,
                sliceParam
                    ->slice_alpha_c0_offset_div2); /* slice_alpha_c0_offset_div2:
                                                      2 */
            bit_writer_put_se(
                &bs,
                sliceParam
                    ->slice_beta_offset_div2); /* slice_beta_offset_div2: 2 */
        }
    }

    if (m_picParam->pic_fields.bits.entropy_coding_mode_flag) {
        bs.writeToBytesAligned(true);
    }

    uint32_t codedBits = bs.getCodedBitsCount();
    uint8_t* codedData = bs.getBitWriterData();
    ASSERT(codedData && codedBits);

    if (!picture->addPackedHeader(VAEncPackedHeaderSlice, codedData,
                                  codedBits)) {
        ret = false;
    }

    return ret;
}

/* Adds slice headers to picture */
bool VaapiEncoderH264::addSliceHeaders (const PicturePtr& picture) const
{
    VAEncSliceParameterBufferH264 *sliceParam;
    uint32_t sliceOfMbs, sliceModMbs, curSliceMbs;
    uint32_t mbSize;
    uint32_t lastMbIndex;

    assert (picture);

    if (picture->m_type != VAAPI_PICTURE_I) {
        /* have one reference frame at least */
        assert(m_refList0.size() > 0);
    }

    mbSize = m_mbWidth * m_mbHeight;

    assert (m_numSlices && m_numSlices < mbSize);
    sliceOfMbs = mbSize / m_numSlices;
    sliceModMbs = mbSize % m_numSlices;
    lastMbIndex = 0;
    for (uint32_t i = 0; i < m_numSlices; ++i) {
        curSliceMbs = sliceOfMbs;
        if (sliceModMbs) {
            ++curSliceMbs;
            --sliceModMbs;
        }
        if (!picture->newSlice(sliceParam))
            return false;

        sliceParam->macroblock_address = lastMbIndex;
        sliceParam->num_macroblocks = curSliceMbs;
        sliceParam->macroblock_info = VA_INVALID_ID;
        sliceParam->slice_type = h264_get_slice_type (picture->m_type);
        assert (sliceParam->slice_type != -1);
        sliceParam->idr_pic_id = m_idrNum;
        sliceParam->pic_order_cnt_lsb = picture->m_poc % m_maxPicOrderCnt;

        sliceParam->num_ref_idx_active_override_flag = 1;
        if (picture->m_type != VAAPI_PICTURE_I && m_refList0.size() > 0)
            sliceParam->num_ref_idx_l0_active_minus1 = m_refList0.size() - 1;
        if (picture->m_type == VAAPI_PICTURE_B && m_refList1.size() > 0)
            sliceParam->num_ref_idx_l1_active_minus1 = m_refList1.size() - 1;

        fillReferenceList(sliceParam);

        sliceParam->slice_qp_delta = initQP() - m_ppsQp;
        DEBUG("init qp is %d, pps qp is %d, maxQp is %d, minQp is %d", initQP(),
              m_ppsQp, maxQP(), minQP());
        if(rateControlMode() == RATE_CONTROL_CQP){
            switch (picture->m_type) {
            case VAAPI_PICTURE_B:
                sliceParam->slice_qp_delta += m_videoParamCommon.rcParams.diffQPIB;
                break;
            case VAAPI_PICTURE_P:
                sliceParam->slice_qp_delta += m_videoParamCommon.rcParams.diffQPIP;
                break;
            case VAAPI_PICTURE_I:
            default:
                break;
            }
            if((int32_t)initQP() + sliceParam->slice_qp_delta > (int32_t)maxQP()){
                sliceParam->slice_qp_delta = maxQP() - initQP();
            }
            if((int32_t)initQP() + sliceParam->slice_qp_delta < (int32_t)minQP()){
                sliceParam->slice_qp_delta = (int32_t)minQP() - (int32_t)initQP();
            }
        }

        DEBUG("slice_qp_delta is %d", sliceParam->slice_qp_delta);

        sliceParam->disable_deblocking_filter_idc = !m_videoParamAVC.enableDeblockFilter;
        sliceParam->slice_alpha_c0_offset_div2 = m_videoParamAVC.deblockAlphaOffsetDiv2;
        sliceParam->slice_beta_offset_div2 = m_videoParamAVC.deblockBetaOffsetDiv2;
        /* set calculation for next slice */
        lastMbIndex += curSliceMbs;

        if (m_videoParamAVC.enablePrefixNalUnit
            && !addPackedPrefixNalUnit(picture))
            return false;
        if (!addPackedSliceHeader(picture, sliceParam))
            return false;
    }
    assert (lastMbIndex == mbSize);
    return true;
}

bool VaapiEncoderH264::ensureSequence(const PicturePtr& picture)
{
    if (!picture->editSequence(m_seqParam) || !fill(m_seqParam)) {
        ERROR("failed to create sequence parameter buffer (SPS)");
        return false;
    }

    if (picture->isIdr() && !ensureSequenceHeader(picture, m_seqParam)) {
        ERROR ("failed to create packed sequence header buffer");
        return false;
    }
    return true;
}

bool VaapiEncoderH264::ensurePicture (const PicturePtr& picture, const SurfacePtr& surface)
{
    if (!pictureReferenceListSet(picture)) {
        ERROR ("reference list reorder failed");
        return false;
    }

    if (!picture->editPicture(m_picParam)
        || !fill(m_picParam, picture, surface)) {
        ERROR("failed to create picture parameter buffer (PPS)");
        return false;
    }

    if (picture->isIdr() && !ensurePictureHeader(picture, m_picParam)) {
            ERROR ("set picture packed header failed");
            return false;
    }
    return true;
}

bool VaapiEncoderH264::ensureSlices(const PicturePtr& picture)
{
    assert (picture);

    if (!addSliceHeaders (picture))
        return false;
    return true;
}

YamiStatus VaapiEncoderH264::encodePicture(const PicturePtr& picture)
{
    YamiStatus ret = YAMI_FAIL;

    SurfacePtr reconstruct = createSurface();
    if (!reconstruct)
        return ret;
    {
        AutoLock locker(m_paramLock);

#ifdef __BUILD_GET_MV__
        uint32_t size;
        void *buffer = NULL;
        getMVBufferSize(&size);
        if (!picture->editMVBuffer(buffer, &size))
            return ret;
#endif
        if (!ensureSequence (picture))
            return ret;
        if (!ensureMiscParams (picture.get()))
            return ret;
        if (!ensurePicture(picture, reconstruct))
            return ret;
        if (!ensureSlices (picture))
            return ret;
    }
    if (!picture->encode())
        return ret;

    if (!referenceListUpdate (picture, reconstruct))
        return ret;

    return YAMI_SUCCESS;
}

}
