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PL286/hardware/intel/common/libmix/videoencoder/bitstream.h

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/*
* Copyright (c) 2009-2011 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.
*/
#ifndef __BITSTREAM_H__
#define __BITSTREAM_H__
#include <VideoEncoderBase.h>
#include <assert.h>
struct bitstream {
unsigned int *buffer;
int bit_offset;
int max_size_in_dword;
};
#define BITSTREAM_ALLOCATE_STEPPING 4096
static unsigned int va_swap32(unsigned int val)
{
unsigned char *pval = (unsigned char *)&val;
return ((pval[0] << 24) |
(pval[1] << 16) |
(pval[2] << 8) |
(pval[3] << 0));
}
static void bitstream_start(bitstream *bs)
{
bs->max_size_in_dword = BITSTREAM_ALLOCATE_STEPPING;
bs->buffer = (unsigned int*)calloc(bs->max_size_in_dword * sizeof(int), 1);
bs->bit_offset = 0;
}
static void bitstream_end(bitstream *bs)
{
int pos = (bs->bit_offset >> 5);
int bit_offset = (bs->bit_offset & 0x1f);
int bit_left = 32 - bit_offset;
if (bit_offset) {
bs->buffer[pos] = va_swap32((bs->buffer[pos] << bit_left));
}
}
static void bitstream_put_ui(bitstream *bs, unsigned int val, int size_in_bits)
{
int pos = (bs->bit_offset >> 5);
int bit_offset = (bs->bit_offset & 0x1f);
int bit_left = 32 - bit_offset;
if (!size_in_bits)
return;
bs->bit_offset += size_in_bits;
if (bit_left > size_in_bits) {
bs->buffer[pos] = (bs->buffer[pos] << size_in_bits | val);
} else {
size_in_bits -= bit_left;
bs->buffer[pos] = (bs->buffer[pos] << bit_left) | (val >> size_in_bits);
bs->buffer[pos] = va_swap32(bs->buffer[pos]);
if (pos + 1 == bs->max_size_in_dword) {
bs->max_size_in_dword += BITSTREAM_ALLOCATE_STEPPING;
bs->buffer = (unsigned int*)realloc(bs->buffer, bs->max_size_in_dword * sizeof(unsigned int));
if (bs->buffer == NULL)
abort();
}
bs->buffer[pos + 1] = val;
}
}
static void bitstream_put_ue(bitstream *bs, unsigned int val)
{
int size_in_bits = 0;
int tmp_val = ++val;
while (tmp_val) {
tmp_val >>= 1;
size_in_bits++;
}
bitstream_put_ui(bs, 0, size_in_bits - 1); // leading zero
bitstream_put_ui(bs, val, size_in_bits);
}
static void bitstream_put_se(bitstream *bs, int val)
{
unsigned int new_val;
if (val <= 0)
new_val = -2 * val;
else
new_val = 2 * val - 1;
bitstream_put_ue(bs, new_val);
}
static void bitstream_byte_aligning(bitstream *bs, int bit)
{
int bit_offset = (bs->bit_offset & 0x7);
int bit_left = 8 - bit_offset;
int new_val;
if (!bit_offset)
return;
assert(bit == 0 || bit == 1);
if (bit)
new_val = (1 << bit_left) - 1;
else
new_val = 0;
bitstream_put_ui(bs, new_val, bit_left);
}
static void rbsp_trailing_bits(bitstream *bs)
{
bitstream_put_ui(bs, 1, 1);
bitstream_byte_aligning(bs, 0);
}
static void nal_start_code_prefix(bitstream *bs)
{
bitstream_put_ui(bs, 0x00000001, 32);
}
static void nal_header(bitstream *bs, int nal_ref_idc, int nal_unit_type)
{
bitstream_put_ui(bs, 0, 1); /* forbidden_zero_bit: 0 */
bitstream_put_ui(bs, nal_ref_idc, 2);
bitstream_put_ui(bs, nal_unit_type, 5);
}
#define NAL_REF_IDC_NONE 0
#define NAL_REF_IDC_LOW 1
#define NAL_REF_IDC_MEDIUM 2
#define NAL_REF_IDC_HIGH 3
#define NAL_NON_IDR 1
#define NAL_IDR 5
#define NAL_SPS 7
#define NAL_PPS 8
#define NAL_SEI 6
#define SLICE_TYPE_P 0
#define SLICE_TYPE_B 1
#define SLICE_TYPE_I 2
#define ENTROPY_MODE_CAVLC 0
#define ENTROPY_MODE_CABAC 1
#define PROFILE_IDC_BASELINE 66
#define PROFILE_IDC_MAIN 77
#define PROFILE_IDC_HIGH 100
static void sps_rbsp(bitstream *bs, VAProfile profile, int frame_bit_rate, VAEncSequenceParameterBufferH264 *seq_param)
{
int profile_idc = 0;
int constraint_set_flag = 0;
if (profile == VAProfileH264High) {
profile_idc = PROFILE_IDC_HIGH;
constraint_set_flag |= (1 << 3); /* Annex A.2.4 */
}
else if (profile == VAProfileH264Main) {
profile_idc = PROFILE_IDC_MAIN;
constraint_set_flag |= (1 << 1); /* Annex A.2.2 */
} else {
profile_idc = PROFILE_IDC_BASELINE;
constraint_set_flag |= (1 << 0); /* Annex A.2.1 */
}
bitstream_put_ui(bs, profile_idc, 8); /* profile_idc */
bitstream_put_ui(bs, !!(constraint_set_flag & 1), 1); /* constraint_set0_flag */
bitstream_put_ui(bs, !!(constraint_set_flag & 2), 1); /* constraint_set1_flag */
bitstream_put_ui(bs, !!(constraint_set_flag & 4), 1); /* constraint_set2_flag */
bitstream_put_ui(bs, !!(constraint_set_flag & 8), 1); /* constraint_set3_flag */
bitstream_put_ui(bs, 0, 4); /* reserved_zero_4bits */
bitstream_put_ui(bs, seq_param->level_idc, 8); /* level_idc */
bitstream_put_ue(bs, seq_param->seq_parameter_set_id); /* seq_parameter_set_id */
if ( profile_idc == PROFILE_IDC_HIGH) {
bitstream_put_ue(bs, 1); /* chroma_format_idc = 1, 4:2:0 */
bitstream_put_ue(bs, 0); /* bit_depth_luma_minus8 */
bitstream_put_ue(bs, 0); /* bit_depth_chroma_minus8 */
bitstream_put_ui(bs, 0, 1); /* qpprime_y_zero_transform_bypass_flag */
bitstream_put_ui(bs, 0, 1); /* seq_scaling_matrix_present_flag */
}
bitstream_put_ue(bs, seq_param->seq_fields.bits.log2_max_frame_num_minus4); /* log2_max_frame_num_minus4 */
bitstream_put_ue(bs, seq_param->seq_fields.bits.pic_order_cnt_type); /* pic_order_cnt_type */
if (seq_param->seq_fields.bits.pic_order_cnt_type == 0)
bitstream_put_ue(bs, seq_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4); /* log2_max_pic_order_cnt_lsb_minus4 */
else {
assert(0);
}
bitstream_put_ue(bs, seq_param->max_num_ref_frames); /* num_ref_frames */
bitstream_put_ui(bs, 0, 1); /* gaps_in_frame_num_value_allowed_flag */
bitstream_put_ue(bs, seq_param->picture_width_in_mbs - 1); /* pic_width_in_mbs_minus1 */
bitstream_put_ue(bs, seq_param->picture_height_in_mbs - 1); /* pic_height_in_map_units_minus1 */
bitstream_put_ui(bs, seq_param->seq_fields.bits.frame_mbs_only_flag, 1); /* frame_mbs_only_flag */
if (!seq_param->seq_fields.bits.frame_mbs_only_flag) {
assert(0);
}
bitstream_put_ui(bs, seq_param->seq_fields.bits.direct_8x8_inference_flag, 1); /* direct_8x8_inference_flag */
bitstream_put_ui(bs, seq_param->frame_cropping_flag, 1); /* frame_cropping_flag */
if (seq_param->frame_cropping_flag) {
bitstream_put_ue(bs, seq_param->frame_crop_left_offset); /* frame_crop_left_offset */
bitstream_put_ue(bs, seq_param->frame_crop_right_offset); /* frame_crop_right_offset */
bitstream_put_ue(bs, seq_param->frame_crop_top_offset); /* frame_crop_top_offset */
bitstream_put_ue(bs, seq_param->frame_crop_bottom_offset); /* frame_crop_bottom_offset */
}
if ( frame_bit_rate < 0 ) {
bitstream_put_ui(bs, 0, 1); /* vui_parameters_present_flag */
} else {
bitstream_put_ui(bs, 1, 1); /* vui_parameters_present_flag */
bitstream_put_ui(bs, 0, 1); /* aspect_ratio_info_present_flag */
bitstream_put_ui(bs, 0, 1); /* overscan_info_present_flag */
bitstream_put_ui(bs, 0, 1); /* video_signal_type_present_flag */
bitstream_put_ui(bs, 0, 1); /* chroma_loc_info_present_flag */
bitstream_put_ui(bs, 1, 1); /* timing_info_present_flag */
{
bitstream_put_ui(bs, 15, 32);
bitstream_put_ui(bs, 900, 32);
bitstream_put_ui(bs, 1, 1);
}
bitstream_put_ui(bs, 1, 1); /* nal_hrd_parameters_present_flag */
{
// hrd_parameters
bitstream_put_ue(bs, 0); /* cpb_cnt_minus1 */
bitstream_put_ui(bs, 4, 4); /* bit_rate_scale */
bitstream_put_ui(bs, 6, 4); /* cpb_size_scale */
bitstream_put_ue(bs, frame_bit_rate - 1); /* bit_rate_value_minus1[0] */
bitstream_put_ue(bs, frame_bit_rate*8 - 1); /* cpb_size_value_minus1[0] */
bitstream_put_ui(bs, 1, 1); /* cbr_flag[0] */
bitstream_put_ui(bs, 23, 5); /* initial_cpb_removal_delay_length_minus1 */
bitstream_put_ui(bs, 23, 5); /* cpb_removal_delay_length_minus1 */
bitstream_put_ui(bs, 23, 5); /* dpb_output_delay_length_minus1 */
bitstream_put_ui(bs, 23, 5); /* time_offset_length */
}
bitstream_put_ui(bs, 0, 1); /* vcl_hrd_parameters_present_flag */
bitstream_put_ui(bs, 0, 1); /* low_delay_hrd_flag */
bitstream_put_ui(bs, 0, 1); /* pic_struct_present_flag */
bitstream_put_ui(bs, 0, 1); /* bitstream_restriction_flag */
}
rbsp_trailing_bits(bs); /* rbsp_trailing_bits */
}
static void pps_rbsp(bitstream *bs, VAEncPictureParameterBufferH264 *pic_param)
{
bitstream_put_ue(bs, pic_param->pic_parameter_set_id); /* pic_parameter_set_id */
bitstream_put_ue(bs, pic_param->seq_parameter_set_id); /* seq_parameter_set_id */
bitstream_put_ui(bs, pic_param->pic_fields.bits.entropy_coding_mode_flag, 1); /* entropy_coding_mode_flag */
bitstream_put_ui(bs, 0, 1); /* pic_order_present_flag: 0 */
bitstream_put_ue(bs, 0); /* num_slice_groups_minus1 */
bitstream_put_ue(bs, pic_param->num_ref_idx_l0_active_minus1); /* num_ref_idx_l0_active_minus1 */
bitstream_put_ue(bs, pic_param->num_ref_idx_l1_active_minus1); /* num_ref_idx_l1_active_minus1 1 */
bitstream_put_ui(bs, pic_param->pic_fields.bits.weighted_pred_flag, 1); /* weighted_pred_flag: 0 */
bitstream_put_ui(bs, pic_param->pic_fields.bits.weighted_bipred_idc, 2); /* weighted_bipred_idc: 0 */
bitstream_put_se(bs, pic_param->pic_init_qp - 26); /* pic_init_qp_minus26 */
bitstream_put_se(bs, 0); /* pic_init_qs_minus26 */
bitstream_put_se(bs, 0); /* chroma_qp_index_offset */
bitstream_put_ui(bs, pic_param->pic_fields.bits.deblocking_filter_control_present_flag, 1); /* deblocking_filter_control_present_flag */
bitstream_put_ui(bs, 0, 1); /* constrained_intra_pred_flag */
bitstream_put_ui(bs, 0, 1); /* redundant_pic_cnt_present_flag */
/* more_rbsp_data */
bitstream_put_ui(bs, pic_param->pic_fields.bits.transform_8x8_mode_flag, 1); /*transform_8x8_mode_flag */
bitstream_put_ui(bs, 0, 1); /* pic_scaling_matrix_present_flag */
bitstream_put_se(bs, pic_param->second_chroma_qp_index_offset ); /*second_chroma_qp_index_offset */
rbsp_trailing_bits(bs);
}
int build_packed_seq_buffer(unsigned char **header_buffer, VAProfile profile, VAEncSequenceParameterBufferH264 *seq_param)
{
bitstream bs;
bitstream_start(&bs);
nal_start_code_prefix(&bs);
nal_header(&bs, NAL_REF_IDC_HIGH, NAL_SPS);
sps_rbsp(&bs, profile, seq_param->bits_per_second, seq_param);
bitstream_end(&bs);
*header_buffer = (unsigned char *)bs.buffer;
return bs.bit_offset;
}
int build_packed_pic_buffer(unsigned char **header_buffer, VAEncPictureParameterBufferH264 *pic_param)
{
bitstream bs;
bitstream_start(&bs);
nal_start_code_prefix(&bs);
nal_header(&bs, NAL_REF_IDC_HIGH, NAL_PPS);
pps_rbsp(&bs, pic_param);
bitstream_end(&bs);
*header_buffer = (unsigned char *)bs.buffer;
return bs.bit_offset;
}
int build_packed_sei_buffer_timing(unsigned int init_cpb_removal_delay,
unsigned int init_cpb_removal_delay_offset,
unsigned int cpb_removal_length,
unsigned int cpb_removal_delay,
unsigned int dpb_output_length,
unsigned int dpb_output_delay,
unsigned char **sei_buffer)
{
unsigned char *byte_buf;
int bp_byte_size, i, pic_byte_size;
bitstream nal_bs;
bitstream sei_bp_bs, sei_pic_bs;
bitstream_start(&sei_bp_bs);
bitstream_put_ue(&sei_bp_bs, 0); /*seq_parameter_set_id*/
bitstream_put_ui(&sei_bp_bs, init_cpb_removal_delay, cpb_removal_length);
bitstream_put_ui(&sei_bp_bs, init_cpb_removal_delay_offset, cpb_removal_length);
if ( sei_bp_bs.bit_offset & 0x7) {
bitstream_put_ui(&sei_bp_bs, 1, 1);
}
bitstream_end(&sei_bp_bs);
bp_byte_size = (sei_bp_bs.bit_offset + 7) / 8;
bitstream_start(&sei_pic_bs);
bitstream_put_ui(&sei_pic_bs, cpb_removal_delay, cpb_removal_length);
bitstream_put_ui(&sei_pic_bs, dpb_output_delay, dpb_output_length);
if ( sei_pic_bs.bit_offset & 0x7) {
bitstream_put_ui(&sei_pic_bs, 1, 1);
}
bitstream_end(&sei_pic_bs);
pic_byte_size = (sei_pic_bs.bit_offset + 7) / 8;
bitstream_start(&nal_bs);
nal_start_code_prefix(&nal_bs);
nal_header(&nal_bs, NAL_REF_IDC_NONE, NAL_SEI);
/* Write the SEI buffer period data */
bitstream_put_ui(&nal_bs, 0, 8);
bitstream_put_ui(&nal_bs, bp_byte_size, 8);
byte_buf = (unsigned char *)sei_bp_bs.buffer;
for(i = 0; i < bp_byte_size; i++) {
bitstream_put_ui(&nal_bs, byte_buf[i], 8);
}
free(byte_buf);
/* write the SEI timing data */
bitstream_put_ui(&nal_bs, 0x01, 8);
bitstream_put_ui(&nal_bs, pic_byte_size, 8);
byte_buf = (unsigned char *)sei_pic_bs.buffer;
for(i = 0; i < pic_byte_size; i++) {
bitstream_put_ui(&nal_bs, byte_buf[i], 8);
}
free(byte_buf);
rbsp_trailing_bits(&nal_bs);
bitstream_end(&nal_bs);
*sei_buffer = (unsigned char *)nal_bs.buffer;
return nal_bs.bit_offset;
}
#endif