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gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth264bitwriter.c
He Junyan c294ba82e6 h264bitwriter: Correct the all API to byte aligned. 
In fact, all the h264 bit writer have byte aligned output except
the slice header. So we change the API from bit size in unit to
byte size, which is easy to use. For slice header, we add a extra
"trail_bits_num" to return the unaligned bits number.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3193>
2022-10-27 12:15:43 +00:00

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/* GStreamer
* Copyright (C) 2020 Intel Corporation
* Author: He Junyan <junyan.he@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the0
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gsth264bitwriter.h"
#include <gst/codecparsers/nalutils.h>
#include <gst/base/gstbitwriter.h>
/******************************** Utils ********************************/
#define SIGNED(val) (2 * ABS(val) - ((val) > 0))
/* Write an unsigned integer Exp-Golomb-coded syntax element. i.e. ue(v) */
static gboolean
_bs_write_ue (GstBitWriter * bs, guint32 value)
{
guint32 size_in_bits = 0;
guint32 tmp_value = ++value;
while (tmp_value) {
++size_in_bits;
tmp_value >>= 1;
}
if (size_in_bits > 1
&& !gst_bit_writer_put_bits_uint32 (bs, 0, size_in_bits - 1))
return FALSE;
if (!gst_bit_writer_put_bits_uint32 (bs, value, size_in_bits))
return FALSE;
return TRUE;
}
#define WRITE_BITS_UNCHECK(bw, val, nbits) \
(nbits <= 8 ? gst_bit_writer_put_bits_uint8 (bw, val, nbits) : \
(nbits <= 16 ? gst_bit_writer_put_bits_uint16 (bw, val, nbits) : \
(nbits <= 32 ? gst_bit_writer_put_bits_uint32 (bw, val, nbits) : \
FALSE)))
#define WRITE_BITS(bw, val, nbits) \
if (!WRITE_BITS_UNCHECK (bw, val, nbits)) { \
g_warning ("Unsupported bit size: %u", nbits); \
have_space = FALSE; \
goto error; \
}
#define WRITE_UE_UNCHECK(bw, val) _bs_write_ue (bw, val)
#ifdef WRITE_UE
#undef WRITE_UE
#endif
#define WRITE_UE(bw, val) \
if (!(have_space = WRITE_UE_UNCHECK (bw, val))) \
goto error; \
#define WRITE_UE_MAX(bw, val, max) \
if ((guint32) val > (max) || !(have_space = WRITE_UE_UNCHECK (bw, val))) \
goto error;
#define WRITE_SE(bw, val) WRITE_UE (bw, SIGNED (val))
#define WRITE_SE_RANGE(bw, val, min, max) \
if (val > max || val < min || \
!(have_space = WRITE_UE_UNCHECK (bw, SIGNED (val)))) \
goto error;
#define WRITE_BYTES_UNCHECK(bw, ptr, nbytes) \
gst_bit_writer_put_bytes(bw, ptr, nbytes)
#ifdef WRITE_BYTES
#undef WRITE_BYTES
#endif
#define WRITE_BYTES(bw, ptr, nbytes) \
if (!(have_space = WRITE_BYTES_UNCHECK (bw, ptr, nbytes))) \
goto error;
/***************************** End of Utils ****************************/
/**** Default scaling_lists according to Table 7-2 *****/
static const guint8 default_4x4_intra[16] = {
6, 13, 13, 20, 20, 20, 28, 28, 28, 28, 32, 32,
32, 37, 37, 42
};
static const guint8 default_4x4_inter[16] = {
10, 14, 14, 20, 20, 20, 24, 24, 24, 24, 27, 27,
27, 30, 30, 34
};
static const guint8 default_8x8_intra[64] = {
6, 10, 10, 13, 11, 13, 16, 16, 16, 16, 18, 18,
18, 18, 18, 23, 23, 23, 23, 23, 23, 25, 25, 25, 25, 25, 25, 25, 27, 27, 27,
27, 27, 27, 27, 27, 29, 29, 29, 29, 29, 29, 29, 31, 31, 31, 31, 31, 31, 33,
33, 33, 33, 33, 36, 36, 36, 36, 38, 38, 38, 40, 40, 42
};
static const guint8 default_8x8_inter[64] = {
9, 13, 13, 15, 13, 15, 17, 17, 17, 17, 19, 19,
19, 19, 19, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 24, 24, 24,
24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 27, 27, 27, 27, 27, 27, 28,
28, 28, 28, 28, 30, 30, 30, 30, 32, 32, 32, 33, 33, 35
};
static gboolean
_h264_bit_writer_scaling_list (GstBitWriter * bw, gboolean * space,
const guint8 scaling_lists_4x4[6][16],
const guint8 scaling_lists_8x8[6][64], const guint8 fallback_4x4_inter[16],
const guint8 fallback_4x4_intra[16], const guint8 fallback_8x8_inter[64],
const guint8 fallback_8x8_intra[64], guint8 n_lists)
{
gboolean have_space = TRUE;
guint i, j;
const guint8 *default_lists[12] = {
fallback_4x4_intra, fallback_4x4_intra, fallback_4x4_intra,
fallback_4x4_inter, fallback_4x4_inter, fallback_4x4_inter,
fallback_8x8_intra, fallback_8x8_inter,
fallback_8x8_intra, fallback_8x8_inter,
fallback_8x8_intra, fallback_8x8_inter
};
GST_DEBUG ("writing scaling lists");
for (i = 0; i < 12; i++) {
if (i < n_lists) {
guint8 scaling_list_present_flag = FALSE;
const guint8 *scaling_list;
guint size;
if (i < 6) {
scaling_list = scaling_lists_4x4[i];
size = 16;
} else {
scaling_list = scaling_lists_8x8[i - 6];
size = 64;
}
if (memcmp (scaling_list, default_lists[i], size))
scaling_list_present_flag = TRUE;
WRITE_BITS (bw, scaling_list_present_flag, 1);
if (scaling_list_present_flag) {
guint8 last_scale, next_scale;
gint8 delta_scale;
for (j = 0; j < size; j++) {
last_scale = next_scale = 8;
for (j = 0; j < size; j++) {
if (next_scale != 0) {
delta_scale = (gint8) (scaling_list[j] - last_scale);
WRITE_SE (bw, delta_scale);
next_scale = scaling_list[j];
}
last_scale = (next_scale == 0) ? last_scale : next_scale;
}
}
}
}
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write scaling lists");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_hrd_parameters (const GstH264HRDParams * hrd,
GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
guint sched_sel_idx;
GST_DEBUG ("writing \"HRD Parameters\"");
WRITE_UE_MAX (bw, hrd->cpb_cnt_minus1, 31);
WRITE_BITS (bw, hrd->bit_rate_scale, 4);
WRITE_BITS (bw, hrd->cpb_size_scale, 4);
for (sched_sel_idx = 0; sched_sel_idx <= hrd->cpb_cnt_minus1; sched_sel_idx++) {
WRITE_UE (bw, hrd->bit_rate_value_minus1[sched_sel_idx]);
WRITE_UE (bw, hrd->cpb_size_value_minus1[sched_sel_idx]);
WRITE_BITS (bw, hrd->cbr_flag[sched_sel_idx], 1);
}
WRITE_BITS (bw, hrd->initial_cpb_removal_delay_length_minus1, 5);
WRITE_BITS (bw, hrd->cpb_removal_delay_length_minus1, 5);
WRITE_BITS (bw, hrd->dpb_output_delay_length_minus1, 5);
WRITE_BITS (bw, hrd->time_offset_length, 5);
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write \"HRD Parameters\"");
*space = have_space;
return FALSE;
}
#define EXTENDED_SAR 255
static gboolean
_h264_bit_writer_vui_parameters (const GstH264SPS * sps, GstBitWriter * bw,
gboolean * space)
{
gboolean have_space = TRUE;
const GstH264VUIParams *vui = &sps->vui_parameters;
GST_DEBUG ("writing \"VUI Parameters\"");
WRITE_BITS (bw, vui->aspect_ratio_info_present_flag, 1);
if (vui->aspect_ratio_info_present_flag) {
WRITE_BITS (bw, vui->aspect_ratio_idc, 8);
if (vui->aspect_ratio_idc == EXTENDED_SAR) {
WRITE_BITS (bw, vui->sar_width, 16);
WRITE_BITS (bw, vui->sar_height, 16);
}
}
WRITE_BITS (bw, vui->overscan_info_present_flag, 1);
if (vui->overscan_info_present_flag)
WRITE_BITS (bw, vui->overscan_appropriate_flag, 1);
WRITE_BITS (bw, vui->video_signal_type_present_flag, 1);
if (vui->video_signal_type_present_flag) {
WRITE_BITS (bw, vui->video_format, 3);
WRITE_BITS (bw, vui->video_full_range_flag, 1);
WRITE_BITS (bw, vui->colour_description_present_flag, 1);
if (vui->colour_description_present_flag) {
WRITE_BITS (bw, vui->colour_primaries, 8);
WRITE_BITS (bw, vui->transfer_characteristics, 8);
WRITE_BITS (bw, vui->matrix_coefficients, 8);
}
}
WRITE_BITS (bw, vui->chroma_loc_info_present_flag, 1);
if (vui->chroma_loc_info_present_flag) {
WRITE_UE_MAX (bw, vui->chroma_sample_loc_type_top_field, 5);
WRITE_UE_MAX (bw, vui->chroma_sample_loc_type_bottom_field, 5);
}
WRITE_BITS (bw, vui->timing_info_present_flag, 1);
if (vui->timing_info_present_flag) {
WRITE_BITS (bw, vui->num_units_in_tick, 32);
if (vui->num_units_in_tick == 0)
GST_WARNING ("num_units_in_tick = 0 write to stream "
"(incompliant to H.264 E.2.1).");
WRITE_BITS (bw, vui->time_scale, 32);
if (vui->time_scale == 0)
GST_WARNING ("time_scale = 0 write to stream "
"(incompliant to H.264 E.2.1).");
WRITE_BITS (bw, vui->fixed_frame_rate_flag, 1);
}
WRITE_BITS (bw, vui->nal_hrd_parameters_present_flag, 1);
if (vui->nal_hrd_parameters_present_flag) {
if (!_h264_bit_writer_hrd_parameters (&vui->nal_hrd_parameters, bw,
&have_space))
goto error;
}
WRITE_BITS (bw, vui->vcl_hrd_parameters_present_flag, 1);
if (vui->vcl_hrd_parameters_present_flag) {
if (!_h264_bit_writer_hrd_parameters (&vui->vcl_hrd_parameters, bw,
&have_space))
goto error;
}
if (vui->nal_hrd_parameters_present_flag ||
vui->vcl_hrd_parameters_present_flag)
WRITE_BITS (bw, vui->low_delay_hrd_flag, 1);
WRITE_BITS (bw, vui->pic_struct_present_flag, 1);
WRITE_BITS (bw, vui->bitstream_restriction_flag, 1);
if (vui->bitstream_restriction_flag) {
WRITE_BITS (bw, vui->motion_vectors_over_pic_boundaries_flag, 1);
WRITE_UE (bw, vui->max_bytes_per_pic_denom);
WRITE_UE_MAX (bw, vui->max_bits_per_mb_denom, 16);
WRITE_UE_MAX (bw, vui->log2_max_mv_length_horizontal, 16);
WRITE_UE_MAX (bw, vui->log2_max_mv_length_vertical, 16);
WRITE_UE (bw, vui->num_reorder_frames);
WRITE_UE (bw, vui->max_dec_frame_buffering);
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write \"VUI Parameters\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sps (const GstH264SPS * sps, GstBitWriter * bw,
gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("writing SPS");
WRITE_BITS (bw, sps->profile_idc, 8);
WRITE_BITS (bw, sps->constraint_set0_flag, 1);
WRITE_BITS (bw, sps->constraint_set1_flag, 1);
WRITE_BITS (bw, sps->constraint_set2_flag, 1);
WRITE_BITS (bw, sps->constraint_set3_flag, 1);
WRITE_BITS (bw, sps->constraint_set4_flag, 1);
WRITE_BITS (bw, sps->constraint_set5_flag, 1);
/* reserved_zero_2bits */
WRITE_BITS (bw, 0, 2);
WRITE_BITS (bw, sps->level_idc, 8);
WRITE_UE_MAX (bw, sps->id, GST_H264_MAX_SPS_COUNT - 1);
if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
sps->profile_idc == 122 || sps->profile_idc == 244 ||
sps->profile_idc == 44 || sps->profile_idc == 83 ||
sps->profile_idc == 86 || sps->profile_idc == 118 ||
sps->profile_idc == 128 || sps->profile_idc == 138 ||
sps->profile_idc == 139 || sps->profile_idc == 134 ||
sps->profile_idc == 135) {
WRITE_UE_MAX (bw, sps->chroma_format_idc, 3);
if (sps->chroma_format_idc == 3)
WRITE_BITS (bw, sps->separate_colour_plane_flag, 1);
WRITE_UE_MAX (bw, sps->bit_depth_luma_minus8, 6);
WRITE_UE_MAX (bw, sps->bit_depth_chroma_minus8, 6);
WRITE_BITS (bw, sps->qpprime_y_zero_transform_bypass_flag, 1);
WRITE_BITS (bw, sps->scaling_matrix_present_flag, 1);
if (sps->scaling_matrix_present_flag) {
guint8 n_lists;
n_lists = (sps->chroma_format_idc != 3) ? 8 : 12;
if (!_h264_bit_writer_scaling_list (bw, &have_space,
sps->scaling_lists_4x4, sps->scaling_lists_8x8,
default_4x4_inter, default_4x4_intra,
default_8x8_inter, default_8x8_intra, n_lists))
goto error;
}
}
WRITE_UE_MAX (bw, sps->log2_max_frame_num_minus4, 12);
WRITE_UE_MAX (bw, sps->pic_order_cnt_type, 2);
if (sps->pic_order_cnt_type == 0) {
WRITE_UE_MAX (bw, sps->log2_max_pic_order_cnt_lsb_minus4, 12);
} else if (sps->pic_order_cnt_type == 1) {
guint i;
WRITE_BITS (bw, sps->delta_pic_order_always_zero_flag, 1);
WRITE_SE (bw, sps->offset_for_non_ref_pic);
WRITE_SE (bw, sps->offset_for_top_to_bottom_field);
WRITE_UE_MAX (bw, sps->num_ref_frames_in_pic_order_cnt_cycle, 255);
for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
WRITE_SE (bw, sps->offset_for_ref_frame[i]);
}
WRITE_UE (bw, sps->num_ref_frames);
WRITE_BITS (bw, sps->gaps_in_frame_num_value_allowed_flag, 1);
WRITE_UE (bw, sps->pic_width_in_mbs_minus1);
WRITE_UE (bw, sps->pic_height_in_map_units_minus1);
WRITE_BITS (bw, sps->frame_mbs_only_flag, 1);
if (!sps->frame_mbs_only_flag)
WRITE_BITS (bw, sps->mb_adaptive_frame_field_flag, 1);
WRITE_BITS (bw, sps->direct_8x8_inference_flag, 1);
WRITE_BITS (bw, sps->frame_cropping_flag, 1);
if (sps->frame_cropping_flag) {
WRITE_UE (bw, sps->frame_crop_left_offset);
WRITE_UE (bw, sps->frame_crop_right_offset);
WRITE_UE (bw, sps->frame_crop_top_offset);
WRITE_UE (bw, sps->frame_crop_bottom_offset);
}
WRITE_BITS (bw, sps->vui_parameters_present_flag, 1);
if (sps->vui_parameters_present_flag)
if (!_h264_bit_writer_vui_parameters (sps, bw, &have_space))
goto error;
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write sps");
*space = have_space;
return FALSE;
}
/**
* gst_h264_bit_writer_sps:
* @sps: the sps of #GstH264SPS to write
* @start_code: whether adding the nal start code
* @data: (out): the bit stream generated by the sps
* @size: (inout): the size in bytes of the input and output
*
* Generating the according h264 bit stream by providing the sps.
*
* Returns: a #GstH264BitWriterResult
*
* Since: 1.22
**/
GstH264BitWriterResult
gst_h264_bit_writer_sps (const GstH264SPS * sps, gboolean start_code,
guint8 * data, guint * size)
{
gboolean have_space = TRUE;
GstBitWriter bw;
g_return_val_if_fail (sps != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (size != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (*size > 0, GST_H264_BIT_WRITER_ERROR);
gst_bit_writer_init_with_data (&bw, data, *size, FALSE);
if (start_code)
WRITE_BITS (&bw, 0x00000001, 32);
/* nal header */
/* forbidden_zero_bit */
WRITE_BITS (&bw, 0, 1);
/* nal_ref_idc */
WRITE_BITS (&bw, 1, 2);
/* nal_unit_type */
WRITE_BITS (&bw, GST_H264_NAL_SPS, 5);
if (!_h264_bit_writer_sps (sps, &bw, &have_space))
goto error;
/* Add trailings. */
WRITE_BITS (&bw, 1, 1);
if (!gst_bit_writer_align_bytes (&bw, 0)) {
have_space = FALSE;
goto error;
}
*size = (gst_bit_writer_get_size (&bw)) / 8;
gst_bit_writer_reset (&bw);
return GST_H264_BIT_WRITER_OK;
error:
gst_bit_writer_reset (&bw);
*size = 0;
return have_space ? GST_H264_BIT_WRITER_INVALID_DATA :
GST_H264_BIT_WRITER_NO_MORE_SPACE;
}
static gboolean
_h264_bit_writer_pps (const GstH264PPS * pps, GstBitWriter * bw,
gboolean * space)
{
gboolean have_space = TRUE;
gint qp_bd_offset;
GST_DEBUG ("writing SPS");
qp_bd_offset = 6 * (pps->sequence->bit_depth_luma_minus8 +
pps->sequence->separate_colour_plane_flag);
WRITE_UE_MAX (bw, pps->id, GST_H264_MAX_PPS_COUNT - 1);
WRITE_UE_MAX (bw, pps->sequence->id, GST_H264_MAX_SPS_COUNT - 1);
WRITE_BITS (bw, pps->entropy_coding_mode_flag, 1);
WRITE_BITS (bw, pps->pic_order_present_flag, 1);
WRITE_UE_MAX (bw, pps->num_slice_groups_minus1, 7);
if (pps->num_slice_groups_minus1 > 0) {
WRITE_UE_MAX (bw, pps->slice_group_map_type, 6);
if (pps->slice_group_map_type == 0) {
gint i;
for (i = 0; i <= pps->num_slice_groups_minus1; i++)
WRITE_UE (bw, pps->run_length_minus1[i]);
} else if (pps->slice_group_map_type == 2) {
gint i;
for (i = 0; i < pps->num_slice_groups_minus1; i++) {
WRITE_UE (bw, pps->top_left[i]);
WRITE_UE (bw, pps->bottom_right[i]);
}
} else if (pps->slice_group_map_type >= 3 && pps->slice_group_map_type <= 5) {
WRITE_BITS (bw, pps->slice_group_change_direction_flag, 1);
WRITE_UE (bw, pps->slice_group_change_rate_minus1);
} else if (pps->slice_group_map_type == 6) {
gint bits;
gint i;
WRITE_UE (bw, pps->pic_size_in_map_units_minus1);
bits = g_bit_storage (pps->num_slice_groups_minus1);
g_assert (pps->slice_group_id);
for (i = 0; i <= pps->pic_size_in_map_units_minus1; i++)
WRITE_BITS (bw, pps->slice_group_id[i], bits);
}
}
WRITE_UE_MAX (bw, pps->num_ref_idx_l0_active_minus1, 31);
WRITE_UE_MAX (bw, pps->num_ref_idx_l1_active_minus1, 31);
WRITE_BITS (bw, pps->weighted_pred_flag, 1);
WRITE_BITS (bw, pps->weighted_bipred_idc, 2);
WRITE_SE_RANGE (bw, pps->pic_init_qp_minus26, -(26 + qp_bd_offset), 25);
WRITE_SE_RANGE (bw, pps->pic_init_qs_minus26, -26, 25);
WRITE_SE_RANGE (bw, pps->chroma_qp_index_offset, -12, 12);
WRITE_BITS (bw, pps->deblocking_filter_control_present_flag, 1);
WRITE_BITS (bw, pps->constrained_intra_pred_flag, 1);
WRITE_BITS (bw, pps->redundant_pic_cnt_present_flag, 1);
/* A.2.1 Baseline profile, A.2.2 Main profile and
A.2.3 Extended profile:
The syntax elements transform_8x8_mode_flag,
pic_scaling_matrix_present_flag, second_chroma_qp_index_offset
shall not be present in picture parameter sets. */
if (pps->sequence->profile_idc == 66 ||
pps->sequence->profile_idc == 77 || pps->sequence->profile_idc == 88)
return TRUE;
WRITE_BITS (bw, pps->transform_8x8_mode_flag, 1);
WRITE_BITS (bw, pps->pic_scaling_matrix_present_flag, 1);
if (pps->pic_scaling_matrix_present_flag) {
guint8 n_lists;
n_lists = 6 + ((pps->sequence->chroma_format_idc != 3) ? 2 : 6) *
pps->transform_8x8_mode_flag;
if (pps->sequence->scaling_matrix_present_flag) {
if (!_h264_bit_writer_scaling_list (bw, &have_space,
pps->scaling_lists_4x4, pps->scaling_lists_8x8,
pps->sequence->scaling_lists_4x4[3],
pps->sequence->scaling_lists_4x4[0],
pps->sequence->scaling_lists_8x8[3],
pps->sequence->scaling_lists_8x8[0], n_lists))
goto error;
} else {
if (!_h264_bit_writer_scaling_list (bw, &have_space,
pps->scaling_lists_4x4, pps->scaling_lists_8x8,
default_4x4_inter, default_4x4_intra,
default_8x8_inter, default_8x8_intra, n_lists))
goto error;
}
}
WRITE_SE_RANGE (bw, ((gint) pps->second_chroma_qp_index_offset), -12, 12);
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write pps");
*space = have_space;
return FALSE;
}
/**
* gst_h264_bit_writer_pps:
* @pps: the pps of #GstH264PPS to write
* @start_code: whether adding the nal start code
* @data: (out): the bit stream generated by the pps
* @size: (inout): the size in bytes of the input and output
*
* Generating the according h264 bit stream by providing the pps.
*
* Returns: a #GstH264BitWriterResult
*
* Since: 1.22
**/
GstH264BitWriterResult
gst_h264_bit_writer_pps (const GstH264PPS * pps, gboolean start_code,
guint8 * data, guint * size)
{
gboolean have_space = TRUE;
GstBitWriter bw;
g_return_val_if_fail (pps != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (pps->sequence != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (size != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (*size > 0, GST_H264_BIT_WRITER_ERROR);
gst_bit_writer_init_with_data (&bw, data, *size, FALSE);
if (start_code)
WRITE_BITS (&bw, 0x00000001, 32);
/* nal header */
/* forbidden_zero_bit */
WRITE_BITS (&bw, 0, 1);
/* nal_ref_idc */
WRITE_BITS (&bw, 1, 2);
/* nal_unit_type */
WRITE_BITS (&bw, GST_H264_NAL_PPS, 5);
if (!_h264_bit_writer_pps (pps, &bw, &have_space))
goto error;
/* Add trailings. */
WRITE_BITS (&bw, 1, 1);
if (!gst_bit_writer_align_bytes (&bw, 0)) {
have_space = FALSE;
goto error;
}
*size = (gst_bit_writer_get_size (&bw)) / 8;
gst_bit_writer_reset (&bw);
return GST_H264_BIT_WRITER_OK;
error:
gst_bit_writer_reset (&bw);
*size = 0;
return have_space ? GST_H264_BIT_WRITER_INVALID_DATA :
GST_H264_BIT_WRITER_NO_MORE_SPACE;
}
static gboolean
_h264_slice_bit_writer_ref_pic_list_modification_1 (const GstH264SliceHdr *
slice, guint list, gboolean is_mvc, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
const GstH264RefPicListModification *entries;
guint8 ref_pic_list_modification_flag = 0;
guint i;
if (list == 0) {
entries = slice->ref_pic_list_modification_l0;
ref_pic_list_modification_flag = slice->ref_pic_list_modification_flag_l0;
} else {
entries = slice->ref_pic_list_modification_l1;
ref_pic_list_modification_flag = slice->ref_pic_list_modification_flag_l1;
}
WRITE_BITS (bw, ref_pic_list_modification_flag, 1);
if (ref_pic_list_modification_flag) {
i = 0;
do {
g_assert (i < 32);
WRITE_UE (bw, entries[i].modification_of_pic_nums_idc);
if (entries[i].modification_of_pic_nums_idc == 0 ||
entries[i].modification_of_pic_nums_idc == 1) {
WRITE_UE_MAX (bw, entries[i].value.abs_diff_pic_num_minus1,
slice->max_pic_num - 1);
} else if (entries[i].modification_of_pic_nums_idc == 2) {
WRITE_UE (bw, entries[i].value.long_term_pic_num);
} else if (is_mvc && (entries[i].modification_of_pic_nums_idc == 4 ||
entries[i].modification_of_pic_nums_idc == 5)) {
WRITE_UE (bw, entries[i].value.abs_diff_view_idx_minus1);
}
} while (entries[i++].modification_of_pic_nums_idc != 3);
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write \"Reference picture list %u modification\"",
list);
*space = have_space;
return FALSE;
}
static gboolean
_h264_slice_bit_writer_ref_pic_list_modification (const GstH264SliceHdr *
slice, gboolean is_mvc, GstBitWriter * bw, gboolean * space)
{
if (!GST_H264_IS_I_SLICE (slice) && !GST_H264_IS_SI_SLICE (slice)) {
if (!_h264_slice_bit_writer_ref_pic_list_modification_1 (slice, 0,
is_mvc, bw, space))
return FALSE;
}
if (GST_H264_IS_B_SLICE (slice)) {
if (!_h264_slice_bit_writer_ref_pic_list_modification_1 (slice, 1,
is_mvc, bw, space))
return FALSE;
}
*space = TRUE;
return TRUE;
}
static gboolean
_h264_slice_bit_writer_pred_weight_table (const GstH264SliceHdr * slice,
guint8 chroma_array_type, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
const GstH264PredWeightTable *p;
gint i;
gint16 default_luma_weight, default_chroma_weight;
GST_DEBUG ("writing \"Prediction weight table\"");
p = &slice->pred_weight_table;
default_luma_weight = 1 << p->luma_log2_weight_denom;
default_chroma_weight = 1 << p->chroma_log2_weight_denom;
WRITE_UE_MAX (bw, p->luma_log2_weight_denom, 7);
if (chroma_array_type != 0)
WRITE_UE_MAX (bw, p->chroma_log2_weight_denom, 7);
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
guint8 luma_weight_l0_flag = 0;
if (p->luma_weight_l0[i] != default_luma_weight ||
p->luma_offset_l0[i] != 0)
luma_weight_l0_flag = 1;
WRITE_BITS (bw, luma_weight_l0_flag, 1);
if (luma_weight_l0_flag) {
WRITE_SE_RANGE (bw, p->luma_weight_l0[i], -128, 127);
WRITE_SE_RANGE (bw, p->luma_offset_l0[i], -128, 127);
}
if (chroma_array_type != 0) {
guint8 chroma_weight_l0_flag = 0;
gint j;
for (j = 0; j < 2; j++) {
if (p->chroma_weight_l0[i][j] != default_chroma_weight ||
p->chroma_offset_l0[i][j] != 0)
chroma_weight_l0_flag = 1;
}
WRITE_BITS (bw, chroma_weight_l0_flag, 1);
if (chroma_weight_l0_flag) {
for (j = 0; j < 2; j++) {
WRITE_SE_RANGE (bw, p->chroma_weight_l0[i][j], -128, 127);
WRITE_SE_RANGE (bw, p->chroma_offset_l0[i][j], -128, 127);
}
}
}
}
if (GST_H264_IS_B_SLICE (slice)) {
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++) {
guint8 luma_weight_l1_flag = 0;
if (p->luma_weight_l1[i] != default_luma_weight ||
p->luma_offset_l1[i] != 0)
luma_weight_l1_flag = 1;
WRITE_BITS (bw, luma_weight_l1_flag, 1);
if (luma_weight_l1_flag) {
WRITE_SE_RANGE (bw, p->luma_weight_l1[i], -128, 127);
WRITE_SE_RANGE (bw, p->luma_offset_l1[i], -128, 127);
}
if (chroma_array_type != 0) {
guint8 chroma_weight_l1_flag = 0;
gint j;
for (j = 0; j < 2; j++) {
if (p->chroma_weight_l1[i][j] != default_chroma_weight ||
p->chroma_offset_l1[i][j] != 0)
chroma_weight_l1_flag = 1;
}
WRITE_BITS (bw, chroma_weight_l1_flag, 1);
if (chroma_weight_l1_flag) {
for (j = 0; j < 2; j++) {
WRITE_SE_RANGE (bw, p->chroma_weight_l1[i][j], -128, 127);
WRITE_SE_RANGE (bw, p->chroma_offset_l1[i][j], -128, 127);
}
}
}
}
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write \"Prediction weight table\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_slice_dec_ref_pic_marking (const GstH264SliceHdr * slice,
guint32 nal_type, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("writing \"Dec Ref Pic Marking\"");
if (nal_type == GST_H264_NAL_SLICE_IDR) {
WRITE_BITS (bw, slice->dec_ref_pic_marking.no_output_of_prior_pics_flag, 1);
WRITE_BITS (bw, slice->dec_ref_pic_marking.long_term_reference_flag, 1);
} else {
WRITE_BITS (bw,
slice->dec_ref_pic_marking.adaptive_ref_pic_marking_mode_flag, 1);
if (slice->dec_ref_pic_marking.adaptive_ref_pic_marking_mode_flag) {
const GstH264RefPicMarking *refpicmarking;
guint i;
for (i = 0; i < slice->dec_ref_pic_marking.n_ref_pic_marking; i++) {
refpicmarking = &slice->dec_ref_pic_marking.ref_pic_marking[i];
WRITE_UE_MAX (bw,
refpicmarking->memory_management_control_operation, 6);
if (refpicmarking->memory_management_control_operation == 0)
break;
if (refpicmarking->memory_management_control_operation == 1
|| refpicmarking->memory_management_control_operation == 3)
WRITE_UE (bw, refpicmarking->difference_of_pic_nums_minus1);
if (refpicmarking->memory_management_control_operation == 2)
WRITE_UE (bw, refpicmarking->long_term_pic_num);
if (refpicmarking->memory_management_control_operation == 3
|| refpicmarking->memory_management_control_operation == 6)
WRITE_UE (bw, refpicmarking->long_term_frame_idx);
if (refpicmarking->memory_management_control_operation == 4)
WRITE_UE (bw, refpicmarking->max_long_term_frame_idx_plus1);
}
}
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write \"Dec Ref Pic Marking\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_slice_hdr (const GstH264SliceHdr * slice, guint32 nal_type,
guint32 ext_type, gboolean is_ref, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("writing slice header");
WRITE_UE (bw, slice->first_mb_in_slice);
WRITE_UE (bw, slice->type);
WRITE_UE_MAX (bw, slice->pps->id, GST_H264_MAX_PPS_COUNT - 1);
if (slice->pps->sequence->separate_colour_plane_flag)
WRITE_BITS (bw, slice->colour_plane_id, 2);
WRITE_BITS (bw, slice->frame_num,
slice->pps->sequence->log2_max_frame_num_minus4 + 4);
if (!slice->pps->sequence->frame_mbs_only_flag) {
WRITE_BITS (bw, slice->field_pic_flag, 1);
if (slice->field_pic_flag)
WRITE_BITS (bw, slice->bottom_field_flag, 1);
}
if (nal_type == GST_H264_NAL_SLICE_IDR)
WRITE_UE_MAX (bw, slice->idr_pic_id, G_MAXUINT16);
if (slice->pps->sequence->pic_order_cnt_type == 0) {
WRITE_BITS (bw, slice->pic_order_cnt_lsb,
slice->pps->sequence->log2_max_pic_order_cnt_lsb_minus4 + 4);
if (slice->pps->pic_order_present_flag && !slice->field_pic_flag)
WRITE_SE (bw, slice->delta_pic_order_cnt_bottom);
}
if (slice->pps->sequence->pic_order_cnt_type == 1
&& !slice->pps->sequence->delta_pic_order_always_zero_flag) {
WRITE_SE (bw, slice->delta_pic_order_cnt[0]);
if (slice->pps->pic_order_present_flag && !slice->field_pic_flag)
WRITE_SE (bw, slice->delta_pic_order_cnt[1]);
}
if (slice->pps->redundant_pic_cnt_present_flag)
WRITE_UE_MAX (bw, slice->redundant_pic_cnt, G_MAXINT8);
if (GST_H264_IS_B_SLICE (slice))
WRITE_BITS (bw, slice->direct_spatial_mv_pred_flag, 1);
if (GST_H264_IS_P_SLICE (slice) || GST_H264_IS_SP_SLICE (slice) ||
GST_H264_IS_B_SLICE (slice)) {
WRITE_BITS (bw, slice->num_ref_idx_active_override_flag, 1);
if (slice->num_ref_idx_active_override_flag) {
WRITE_UE_MAX (bw, slice->num_ref_idx_l0_active_minus1, 31);
if (GST_H264_IS_B_SLICE (slice))
WRITE_UE_MAX (bw, slice->num_ref_idx_l1_active_minus1, 31);
}
}
if (!_h264_slice_bit_writer_ref_pic_list_modification (slice,
ext_type == GST_H264_NAL_EXTENSION_MVC, bw, &have_space))
goto error;
if ((slice->pps->weighted_pred_flag && (GST_H264_IS_P_SLICE (slice)
|| GST_H264_IS_SP_SLICE (slice)))
|| (slice->pps->weighted_bipred_idc == 1 && GST_H264_IS_B_SLICE (slice))) {
if (!_h264_slice_bit_writer_pred_weight_table (slice,
slice->pps->sequence->chroma_array_type, bw, &have_space))
goto error;
}
if (is_ref) {
if (!_h264_bit_writer_slice_dec_ref_pic_marking (slice, nal_type, bw,
&have_space))
goto error;
}
if (slice->pps->entropy_coding_mode_flag && !GST_H264_IS_I_SLICE (slice) &&
!GST_H264_IS_SI_SLICE (slice))
WRITE_UE_MAX (bw, slice->cabac_init_idc, 2);
WRITE_SE_RANGE (bw, slice->slice_qp_delta, -87, 77);
if (GST_H264_IS_SP_SLICE (slice) || GST_H264_IS_SI_SLICE (slice)) {
if (GST_H264_IS_SP_SLICE (slice))
WRITE_BITS (bw, slice->sp_for_switch_flag, 1);
WRITE_SE_RANGE (bw, slice->slice_qs_delta, -51, 51);
}
if (slice->pps->deblocking_filter_control_present_flag) {
WRITE_UE_MAX (bw, slice->disable_deblocking_filter_idc, 2);
if (slice->disable_deblocking_filter_idc != 1) {
WRITE_SE_RANGE (bw, slice->slice_alpha_c0_offset_div2, -6, 6);
WRITE_SE_RANGE (bw, slice->slice_beta_offset_div2, -6, 6);
}
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write slice header");
*space = have_space;
return FALSE;
}
/**
* gst_h264_bit_writer_slice_hdr:
* @slice: the slice header of #GstH264SliceHdr to write
* @start_code: whether adding the nal start code
* @nal_type: the slice's nal type of #GstH264NalUnitType
* @is_ref: whether the slice is a reference
* @data: (out): the bit stream generated by the slice header
* @size: (inout): the size in bytes of the input and output
* @trail_bits_num: (out): the trail bits number which is not byte aligned.
*
* Generating the according h264 bit stream by providing the slice header.
*
* Returns: a #GstH264BitWriterResult
*
* Since: 1.22
**/
GstH264BitWriterResult
gst_h264_bit_writer_slice_hdr (const GstH264SliceHdr * slice,
gboolean start_code, GstH264NalUnitType nal_type, gboolean is_ref,
guint8 * data, guint * size, guint * trail_bits_num)
{
gboolean have_space = TRUE;
GstBitWriter bw;
g_return_val_if_fail (slice != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (slice->pps != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (slice->pps->sequence != NULL,
GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (nal_type >= GST_H264_NAL_SLICE
&& nal_type <= GST_H264_NAL_SLICE_IDR, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (size != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (*size > 0, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (trail_bits_num != NULL, GST_H264_BIT_WRITER_ERROR);
if (nal_type == GST_H264_NAL_SLICE_IDR)
g_return_val_if_fail (is_ref, GST_H264_BIT_WRITER_ERROR);
gst_bit_writer_init_with_data (&bw, data, *size, FALSE);
if (start_code)
WRITE_BITS (&bw, 0x00000001, 32);
/* nal header */
/* forbidden_zero_bit */
WRITE_BITS (&bw, 0, 1);
/* nal_ref_idc, zero for non-reference picture */
WRITE_BITS (&bw, is_ref, 2);
/* nal_unit_type */
WRITE_BITS (&bw, nal_type, 5);
if (!_h264_bit_writer_slice_hdr (slice, nal_type,
GST_H264_NAL_EXTENSION_NONE, is_ref, &bw, &have_space))
goto error;
/* We do not add trailing bits here, the slice data should follow it. */
*size = gst_bit_writer_get_size (&bw) / 8;
*trail_bits_num = gst_bit_writer_get_size (&bw) % 8;
gst_bit_writer_reset (&bw);
return GST_H264_BIT_WRITER_OK;
error:
gst_bit_writer_reset (&bw);
*size = 0;
return have_space ? GST_H264_BIT_WRITER_INVALID_DATA :
GST_H264_BIT_WRITER_NO_MORE_SPACE;
}
static gboolean
_h264_bit_writer_sei_registered_user_data (const GstH264RegisteredUserData *
rud, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("Writing \"Registered user data\"");
WRITE_BITS (bw, rud->country_code, 8);
if (rud->country_code == 0xff)
WRITE_BITS (bw, rud->country_code_extension, 8);
WRITE_BYTES (bw, rud->data, rud->size);
*space = TRUE;
return TRUE;
error:GST_WARNING ("Failed to write \"Registered user data\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sei_frame_packing (const GstH264FramePacking *
frame_packing, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("Writing \"Frame packing\"");
WRITE_UE (bw, frame_packing->frame_packing_id);
WRITE_BITS (bw, frame_packing->frame_packing_cancel_flag, 1);
if (!frame_packing->frame_packing_cancel_flag) {
WRITE_BITS (bw, frame_packing->frame_packing_type, 7);
WRITE_BITS (bw, frame_packing->quincunx_sampling_flag, 1);
WRITE_BITS (bw, frame_packing->content_interpretation_type, 6);
WRITE_BITS (bw, frame_packing->spatial_flipping_flag, 1);
WRITE_BITS (bw, frame_packing->frame0_flipped_flag, 1);
WRITE_BITS (bw, frame_packing->field_views_flag, 1);
WRITE_BITS (bw, frame_packing->current_frame_is_frame0_flag, 1);
WRITE_BITS (bw, frame_packing->frame0_self_contained_flag, 1);
WRITE_BITS (bw, frame_packing->frame1_self_contained_flag, 1);
if (!frame_packing->quincunx_sampling_flag &&
frame_packing->frame_packing_type !=
GST_H264_FRAME_PACKING_TEMPORAL_INTERLEAVING) {
WRITE_BITS (bw, frame_packing->frame0_grid_position_x, 4);
WRITE_BITS (bw, frame_packing->frame0_grid_position_y, 4);
WRITE_BITS (bw, frame_packing->frame1_grid_position_x, 4);
WRITE_BITS (bw, frame_packing->frame1_grid_position_y, 4);
}
/* frame_packing_arrangement_reserved_byte */
WRITE_BITS (bw, 0, 8);
WRITE_UE (bw, frame_packing->frame_packing_repetition_period);
}
/* frame_packing_arrangement_extension_flag */
WRITE_BITS (bw, 0, 1);
*space = TRUE;
return TRUE;
error:
GST_WARNING ("Failed to write \"Frame packing\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sei_mastering_display_colour_volume (const
GstH264MasteringDisplayColourVolume * mdcv, GstBitWriter * bw,
gboolean * space)
{
gboolean have_space = TRUE;
gint i;
GST_DEBUG ("Wrtiting \"Mastering display colour volume\"");
for (i = 0; i < 3; i++) {
WRITE_BITS (bw, mdcv->display_primaries_x[i], 16);
WRITE_BITS (bw, mdcv->display_primaries_y[i], 16);
}
WRITE_BITS (bw, mdcv->white_point_x, 16);
WRITE_BITS (bw, mdcv->white_point_y, 16);
WRITE_BITS (bw, mdcv->max_display_mastering_luminance, 32);
WRITE_BITS (bw, mdcv->min_display_mastering_luminance, 32);
*space = TRUE;
return TRUE;
error:
GST_WARNING ("Failed to write \"Mastering display colour volume\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sei_content_light_level_info (const
GstH264ContentLightLevel * cll, GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("Writing \"Content light level\"");
WRITE_BITS (bw, cll->max_content_light_level, 16);
WRITE_BITS (bw, cll->max_pic_average_light_level, 16);
*space = TRUE;
return TRUE;
error:
GST_WARNING ("Failed to write \"Content light level\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sei_pic_timing (const GstH264PicTiming * tim,
GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("Writing \"Picture timing\"");
if (tim->CpbDpbDelaysPresentFlag) {
WRITE_BITS (bw, tim->cpb_removal_delay,
tim->cpb_removal_delay_length_minus1 + 1);
WRITE_BITS (bw, tim->dpb_output_delay,
tim->dpb_output_delay_length_minus1 + 1);
}
if (tim->pic_struct_present_flag) {
const guint8 num_clock_ts_table[9] = {
1, 1, 1, 2, 2, 3, 3, 2, 3
};
guint8 num_clock_num_ts;
guint i;
WRITE_BITS (bw, tim->pic_struct, 4);
num_clock_num_ts = num_clock_ts_table[tim->pic_struct];
for (i = 0; i < num_clock_num_ts; i++) {
WRITE_BITS (bw, tim->clock_timestamp_flag[i], 1);
if (tim->clock_timestamp_flag[i]) {
const GstH264ClockTimestamp *timestamp = &tim->clock_timestamp[i];
WRITE_BITS (bw, timestamp->ct_type, 2);
WRITE_BITS (bw, timestamp->nuit_field_based_flag, 1);
WRITE_BITS (bw, timestamp->counting_type, 5);
WRITE_BITS (bw, timestamp->full_timestamp_flag, 1);
WRITE_BITS (bw, timestamp->discontinuity_flag, 1);
WRITE_BITS (bw, timestamp->cnt_dropped_flag, 1);
WRITE_BITS (bw, timestamp->n_frames, 8);
if (timestamp->full_timestamp_flag) {
if (!timestamp->seconds_flag || !timestamp->minutes_flag
|| !timestamp->hours_flag)
goto error;
WRITE_BITS (bw, timestamp->seconds_value, 6);
WRITE_BITS (bw, timestamp->minutes_value, 6);
WRITE_BITS (bw, timestamp->hours_value, 5);
} else {
WRITE_BITS (bw, timestamp->seconds_flag, 1);
if (timestamp->seconds_flag) {
WRITE_BITS (bw, timestamp->seconds_value, 6);
WRITE_BITS (bw, timestamp->minutes_flag, 1);
if (timestamp->minutes_flag) {
WRITE_BITS (bw, timestamp->minutes_value, 6);
WRITE_BITS (bw, timestamp->hours_flag, 1);
if (timestamp->hours_flag)
WRITE_BITS (bw, timestamp->hours_value, 5);
}
}
}
if (tim->time_offset_length > 0) {
WRITE_BITS (bw, timestamp->time_offset, tim->time_offset_length);
}
}
}
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("Failed to write \"Picture timing\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sei_buffering_period (const GstH264BufferingPeriod * per,
GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("Writing \"Buffering period\"");
if (!per->sps)
goto error;
WRITE_UE_MAX (bw, per->sps->id, GST_H264_MAX_SPS_COUNT - 1);
if (per->sps->vui_parameters_present_flag) {
GstH264VUIParams *vui = &per->sps->vui_parameters;
if (vui->nal_hrd_parameters_present_flag) {
GstH264HRDParams *hrd = &vui->nal_hrd_parameters;
const guint8 nbits = hrd->initial_cpb_removal_delay_length_minus1 + 1;
guint8 sched_sel_idx;
for (sched_sel_idx = 0; sched_sel_idx <= hrd->cpb_cnt_minus1;
sched_sel_idx++) {
WRITE_BITS (bw, per->nal_initial_cpb_removal_delay[sched_sel_idx],
nbits);
WRITE_BITS (bw,
per->nal_initial_cpb_removal_delay_offset[sched_sel_idx], nbits);
}
}
if (vui->vcl_hrd_parameters_present_flag) {
GstH264HRDParams *hrd = &vui->vcl_hrd_parameters;
const guint8 nbits = hrd->initial_cpb_removal_delay_length_minus1 + 1;
guint8 sched_sel_idx;
for (sched_sel_idx = 0; sched_sel_idx <= hrd->cpb_cnt_minus1;
sched_sel_idx++) {
WRITE_BITS (bw, per->vcl_initial_cpb_removal_delay[sched_sel_idx],
nbits);
WRITE_BITS (bw,
per->vcl_initial_cpb_removal_delay_offset[sched_sel_idx], nbits);
}
}
}
*space = TRUE;
return TRUE;
error:
GST_WARNING ("Failed to write \"Buffering period\"");
*space = have_space;
return FALSE;
}
static gboolean
_h264_bit_writer_sei_message (const GstH264SEIMessage * msg,
GstBitWriter * bw, gboolean * space)
{
gboolean have_space = TRUE;
GST_DEBUG ("writing SEI message");
switch (msg->payloadType) {
case GST_H264_SEI_REGISTERED_USER_DATA:
if (!_h264_bit_writer_sei_registered_user_data
(&msg->payload.registered_user_data, bw, &have_space))
goto error;
break;
case GST_H264_SEI_FRAME_PACKING:
if (!_h264_bit_writer_sei_frame_packing
(&msg->payload.frame_packing, bw, &have_space))
goto error;
break;
case GST_H264_SEI_MASTERING_DISPLAY_COLOUR_VOLUME:
if (!_h264_bit_writer_sei_mastering_display_colour_volume
(&msg->payload.mastering_display_colour_volume, bw, &have_space))
goto error;
break;
case GST_H264_SEI_CONTENT_LIGHT_LEVEL:
if (!_h264_bit_writer_sei_content_light_level_info
(&msg->payload.content_light_level, bw, &have_space))
goto error;
break;
case GST_H264_SEI_PIC_TIMING:
if (!_h264_bit_writer_sei_pic_timing (&msg->payload.pic_timing, bw,
&have_space))
goto error;
break;
case GST_H264_SEI_BUF_PERIOD:
if (!_h264_bit_writer_sei_buffering_period
(&msg->payload.buffering_period, bw, &have_space))
goto error;
break;
default:
break;
}
/* Add trailings. */
WRITE_BITS (bw, 1, 1);
gst_bit_writer_align_bytes_unchecked (bw, 0);
*space = TRUE;
return TRUE;
error:
GST_WARNING ("error to write SEI message");
*space = have_space;
return FALSE;
}
/**
* gst_h264_bit_writer_sei:
* @sei_messages: An array of #GstH264SEIMessage to write
* @start_code: whether adding the nal start code
* @data: (out): the bit stream generated by the sei messages
* @size: (inout): the size in bytes of the input and output
*
* Generating the according h264 bit stream by providing sei messages.
*
* Returns: a #GstH264BitWriterResult
*
* Since: 1.22
**/
GstH264BitWriterResult
gst_h264_bit_writer_sei (GArray * sei_messages, gboolean start_code,
guint8 * data, guint * size)
{
gboolean have_space = TRUE;
GstBitWriter bw;
GstBitWriter bw_msg;
GstH264SEIMessage *sei;
gboolean have_written_data = FALSE;
guint i;
g_return_val_if_fail (sei_messages != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (size != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (*size > 0, GST_H264_BIT_WRITER_ERROR);
gst_bit_writer_init_with_data (&bw, data, *size, FALSE);
if (start_code)
WRITE_BITS (&bw, 0x00000001, 32);
/* nal header */
/* forbidden_zero_bit */
WRITE_BITS (&bw, 0, 1);
/* nal_ref_idc, zero for sei nalu */
WRITE_BITS (&bw, 0, 2);
/* nal_unit_type */
WRITE_BITS (&bw, GST_H264_NAL_SEI, 5);
for (i = 0; i < sei_messages->len; i++) {
guint32 payload_size_data;
guint32 payload_type_data;
guint32 sz;
gst_bit_writer_init (&bw_msg);
sei = &g_array_index (sei_messages, GstH264SEIMessage, i);
if (!_h264_bit_writer_sei_message (sei, &bw_msg, &have_space))
goto error;
if (gst_bit_writer_get_size (&bw_msg) == 0) {
GST_FIXME ("Unsupported SEI type %d", sei->payloadType);
continue;
}
have_written_data = TRUE;
g_assert (gst_bit_writer_get_size (&bw_msg) % 8 == 0);
payload_size_data = gst_bit_writer_get_size (&bw_msg) / 8;
payload_type_data = sei->payloadType;
/* write payload type bytes */
while (payload_type_data >= 0xff) {
WRITE_BITS (&bw, 0xff, 8);
payload_type_data -= 0xff;
}
WRITE_BITS (&bw, payload_type_data, 8);
/* write payload size bytes */
sz = payload_size_data;
while (sz >= 0xff) {
WRITE_BITS (&bw, 0xff, 8);
sz -= 0xff;
}
WRITE_BITS (&bw, sz, 8);
if (payload_size_data > 0)
WRITE_BYTES (&bw, gst_bit_writer_get_data (&bw_msg), payload_size_data);
gst_bit_writer_reset (&bw_msg);
}
if (!have_written_data) {
GST_WARNING ("No written sei data");
goto error;
}
/* Add trailings. */
WRITE_BITS (&bw, 1, 1);
if (!gst_bit_writer_align_bytes (&bw, 0)) {
have_space = FALSE;
goto error;
}
*size = (gst_bit_writer_get_size (&bw)) / 8;
gst_bit_writer_reset (&bw);
return GST_H264_BIT_WRITER_OK;
error:
gst_bit_writer_reset (&bw);
*size = 0;
return have_space ? GST_H264_BIT_WRITER_INVALID_DATA :
GST_H264_BIT_WRITER_NO_MORE_SPACE;
}
/**
* gst_h264_bit_writer_aud:
* @primary_pic_type: indicate the possible slice types list just
* as the H264 spec defines
* @start_code: whether adding the nal start code
* @data: (out): the bit stream generated by the aud
* @size: (inout): the size in bytes of the input and output
*
* Generating the according h264 bit stream of an aud.
*
* Returns: a #GstH264BitWriterResult
*
* Since: 1.22
**/
GstH264BitWriterResult
gst_h264_bit_writer_aud (guint8 primary_pic_type, gboolean start_code,
guint8 * data, guint * size)
{
gboolean have_space = TRUE;
GstBitWriter bw;
g_return_val_if_fail (primary_pic_type >= 0
&& primary_pic_type <= 7, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (size != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (*size > 0, GST_H264_BIT_WRITER_ERROR);
gst_bit_writer_init_with_data (&bw, data, *size, FALSE);
if (start_code)
WRITE_BITS (&bw, 0x00000001, 32);
/* nal header */
/* forbidden_zero_bit */
WRITE_BITS (&bw, 0, 1);
/* nal_ref_idc */
WRITE_BITS (&bw, 0, 2);
/* nal_unit_type */
WRITE_BITS (&bw, GST_H264_NAL_AU_DELIMITER, 5);
WRITE_BITS (&bw, primary_pic_type, 3);
/* Add trailings. */
WRITE_BITS (&bw, 1, 1);
if (!gst_bit_writer_align_bytes (&bw, 0)) {
goto error;
}
*size = (gst_bit_writer_get_size (&bw)) / 8;
gst_bit_writer_reset (&bw);
return GST_H264_BIT_WRITER_OK;
error:
gst_bit_writer_reset (&bw);
*size = 0;
return have_space ? GST_H264_BIT_WRITER_INVALID_DATA :
GST_H264_BIT_WRITER_NO_MORE_SPACE;
}
/**
* gst_h264_bit_writer_convert_to_nal:
* @nal_prefix_size: the size in bytes for the prefix of a nal, may
* be 2, 3 or 4
* @packetized: whether to write the bit stream in packetized format,
* which does not have the start code but has a @nal_prefix_size bytes'
* size prepending to the real nal data
* @has_startcode: whether the input already has a start code
* @add_trailings: whether to add rbsp trailing bits to make the output
* aligned to byte
* @raw_data: the input bit stream
* @raw_size: the size in bits of the input bit stream
* @nal_data: (out): the output bit stream converted to a real nal
* @nal_size: (inout): the size in bytes of the output
*
* Converting a bit stream into a real nal packet. If the bit stream already
* has a start code, it will be replaced by the new one specified by the
* @nal_prefix_size and @packetized. It is assured that the output aligns to
* the byte and the all the emulations are inserted.
*
* Returns: a #GstH264BitWriterResult
*
* Since: 1.22
**/
GstH264BitWriterResult
gst_h264_bit_writer_convert_to_nal (guint nal_prefix_size, gboolean packetized,
gboolean has_startcode, gboolean add_trailings, const guint8 * raw_data,
gsize raw_size, guint8 * nal_data, guint * nal_size)
{
NalWriter nw;
guint8 *data;
guint32 size = 0;
gboolean need_more_space = FALSE;
g_return_val_if_fail (
(packetized && nal_prefix_size > 1 && nal_prefix_size < 5) ||
(!packetized && (nal_prefix_size == 3 || nal_prefix_size == 4)),
GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (raw_data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (raw_size > 0, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (nal_data != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (nal_size != NULL, GST_H264_BIT_WRITER_ERROR);
g_return_val_if_fail (*nal_size > 0, GST_H264_BIT_WRITER_ERROR);
if (has_startcode) {
/* Skip the start code, the NalWriter will add it automatically. */
if (raw_size >= 4 && raw_data[0] == 0
&& raw_data[1] == 0 && raw_data[2] == 0 && raw_data[3] == 0x01) {
raw_data += 4;
raw_size -= 4 * 8;
} else if (raw_size >= 3 && raw_data[0] == 0 && raw_data[1] == 0
&& raw_data[2] == 0x01) {
raw_data += 3;
raw_size -= 3 * 8;
} else {
/* Fail to find the start code. */
g_return_val_if_reached (GST_H264_BIT_WRITER_ERROR);
}
}
/* If no RBSP trailing needed, it must align to byte. We assume
that the rbsp trailing bits are already added. */
if (!add_trailings)
g_return_val_if_fail (raw_size % 8 == 0, GST_H264_BIT_WRITER_ERROR);
nal_writer_init (&nw, nal_prefix_size, packetized);
if (!nal_writer_put_bytes (&nw, raw_data, raw_size / 8))
goto error;
if (raw_size % 8) {
guint8 data = *(raw_data + raw_size / 8);
if (!nal_writer_put_bits_uint8 (&nw,
data >> (8 - raw_size % 8), raw_size % 8))
goto error;
}
if (add_trailings) {
if (!nal_writer_do_rbsp_trailing_bits (&nw))
goto error;
}
data = nal_writer_reset_and_get_data (&nw, &size);
if (!data)
goto error;
if (size > *nal_size) {
need_more_space = TRUE;
g_free (data);
goto error;
}
memcpy (nal_data, data, size);
*nal_size = size;
g_free (data);
nal_writer_reset (&nw);
return GST_H264_BIT_WRITER_OK;
error:
nal_writer_reset (&nw);
*nal_size = 0;
GST_WARNING ("Failed to convert nal data");
return need_more_space ? GST_H264_BIT_WRITER_INVALID_DATA :
GST_H264_BIT_WRITER_NO_MORE_SPACE;
}
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