mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-20 23:36:38 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/sys/vdpau/h264/gsth264parser.c

1253 lines
38 KiB
C
Raw Blame History

/* GStreamer
*
* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.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 the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "gstnalreader.h"
#include "gsth264parser.h"
/* default scaling_lists according to Table 7-2 */
const guint8 default_4x4_intra[16] =
{ 6, 13, 13, 20, 20, 20, 28, 28, 28, 28, 32, 32,
32, 37, 37, 42
};
const guint8 default_4x4_inter[16] =
{ 10, 14, 14, 20, 20, 20, 24, 24, 24, 24, 27, 27,
27, 30, 30, 34
};
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
};
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
};
const guint8 zigzag_8x8[64] = {
0, 1, 8, 16, 9, 2, 3, 10,
17, 24, 32, 25, 18, 11, 4, 5,
12, 19, 26, 33, 40, 48, 41, 34,
27, 20, 13, 6, 7, 14, 21, 28,
35, 42, 49, 56, 57, 50, 43, 36,
29, 22, 15, 23, 30, 37, 44, 51,
58, 59, 52, 45, 38, 31, 39, 46,
53, 60, 61, 54, 47, 55, 62, 63
};
const guint8 zigzag_4x4[16] = {
0, 1, 4, 8,
5, 2, 3, 6,
9, 12, 13, 10,
7, 11, 14, 15,
};
#define CHECK_ALLOWED(val, min, max) { \
if (val < min || val > max) { \
GST_WARNING ("value not in allowed range. value: %d, range %d-%d", \
val, min, max); \
goto error; \
} \
}
#define READ_UINT8(reader, val, nbits) { \
if (!gst_nal_reader_get_bits_uint8 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
goto error; \
} \
}
#define READ_UINT16(reader, val, nbits) { \
if (!gst_nal_reader_get_bits_uint16 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
goto error; \
} \
}
#define READ_UINT32(reader, val, nbits) { \
if (!gst_nal_reader_get_bits_uint32 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto error; \
} \
}
#define READ_UINT64(reader, val, nbits) { \
if (!gst_nal_reader_get_bits_uint64 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto error; \
} \
}
#define READ_UE(reader, val) { \
if (!gst_nal_reader_get_ue (reader, &val)) { \
GST_WARNING ("failed to read UE"); \
goto error; \
} \
}
#define READ_UE_ALLOWED(reader, val, min, max) { \
guint32 tmp; \
READ_UE (reader, tmp); \
CHECK_ALLOWED (tmp, min, max); \
val = tmp; \
}
#define READ_SE(reader, val) { \
if (!gst_nal_reader_get_se (reader, &val)) { \
GST_WARNING ("failed to read SE"); \
goto error; \
} \
}
#define READ_SE_ALLOWED(reader, val, min, max) { \
gint32 tmp; \
READ_SE (reader, tmp); \
CHECK_ALLOWED (tmp, min, max); \
val = tmp; \
}
GST_DEBUG_CATEGORY_STATIC (h264parser_debug);
#define GST_CAT_DEFAULT h264parser_debug
#define _do_init \
GST_DEBUG_CATEGORY_INIT (h264parser_debug, "h264parser", 0, \
"H264 parser");
G_DEFINE_TYPE_WITH_CODE (GstH264Parser, gst_h264_parser, G_TYPE_OBJECT,
_do_init);
static void
gst_h264_sequence_free (void *data)
{
g_slice_free (GstH264Sequence, data);
}
static gboolean
gst_h264_parse_hrd_parameters (GstH264HRDParameters * hrd,
GstNalReader * reader)
{
guint SchedSelIdx;
GST_DEBUG ("parsing \"HRD Parameters\"");
READ_UE_ALLOWED (reader, hrd->cpb_cnt_minus1, 0, 31);
READ_UINT8 (reader, hrd->bit_rate_scale, 4);
READ_UINT8 (reader, hrd->cpb_size_scale, 4);
for (SchedSelIdx = 0; SchedSelIdx <= hrd->cpb_cnt_minus1; SchedSelIdx++) {
READ_UE (reader, hrd->bit_rate_value_minus1[SchedSelIdx]);
READ_UE (reader, hrd->cpb_size_value_minus1[SchedSelIdx]);
}
READ_UINT8 (reader, hrd->initial_cpb_removal_delay_length_minus1, 5);
READ_UINT8 (reader, hrd->cpb_removal_delay_length_minus1, 5);
READ_UINT8 (reader, hrd->dpb_output_delay_length_minus1, 5);
READ_UINT8 (reader, hrd->time_offset_length, 5);
return TRUE;
error:
GST_WARNING ("error parsing \"HRD Parameters\"");
return FALSE;
}
static gboolean
gst_h264_parse_vui_parameters (GstH264VUIParameters * vui,
GstNalReader * reader)
{
guint8 aspect_ratio_info_present_flag;
guint8 video_signal_type_present_flag;
guint8 chroma_loc_info_present_flag;
GST_DEBUG ("parsing \"VUI Parameters\"");
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
vui->aspect_ratio_idc = 0;
vui->video_format = 5;
vui->video_full_range_flag = 0;
vui->colour_primaries = 2;
vui->transfer_characteristics = 2;
vui->matrix_coefficients = 2;
vui->chroma_sample_loc_type_top_field = 0;
vui->chroma_sample_loc_type_bottom_field = 0;
vui->low_delay_hrd_flag = 0;
READ_UINT8 (reader, aspect_ratio_info_present_flag, 1);
if (aspect_ratio_info_present_flag) {
READ_UINT8 (reader, vui->aspect_ratio_idc, 8);
if (vui->aspect_ratio_idc == 255) {
READ_UINT16 (reader, vui->sar_width, 16);
READ_UINT16 (reader, vui->sar_height, 16);
}
}
READ_UINT8 (reader, vui->overscan_info_present_flag, 1);
if (vui->overscan_info_present_flag)
READ_UINT8 (reader, vui->overscan_appropriate_flag, 1);
READ_UINT8 (reader, video_signal_type_present_flag, 1);
if (video_signal_type_present_flag) {
guint8 colour_description_present_flag;
READ_UINT8 (reader, vui->video_format, 3);
READ_UINT8 (reader, vui->video_full_range_flag, 1);
READ_UINT8 (reader, colour_description_present_flag, 1);
if (colour_description_present_flag) {
READ_UINT8 (reader, vui->colour_primaries, 8);
READ_UINT8 (reader, vui->transfer_characteristics, 8);
READ_UINT8 (reader, vui->matrix_coefficients, 8);
}
}
READ_UINT8 (reader, chroma_loc_info_present_flag, 1);
if (chroma_loc_info_present_flag) {
READ_UE_ALLOWED (reader, vui->chroma_sample_loc_type_top_field, 0, 5);
READ_UE_ALLOWED (reader, vui->chroma_sample_loc_type_bottom_field, 0, 5);
}
READ_UINT8 (reader, vui->timing_info_present_flag, 1);
if (vui->timing_info_present_flag) {
READ_UINT32 (reader, vui->num_units_in_tick, 32);
if (vui->num_units_in_tick == 0)
GST_WARNING
("num_units_in_tick = 0 detected in stream (incompliant to H.264 E.2.1).");
READ_UINT32 (reader, vui->time_scale, 32);
if (vui->time_scale == 0)
GST_WARNING
("time_scale = 0 detected in stream (incompliant to H.264 E.2.1).");
READ_UINT8 (reader, vui->fixed_frame_rate_flag, 1);
}
READ_UINT8 (reader, vui->nal_hrd_parameters_present_flag, 1);
if (vui->nal_hrd_parameters_present_flag) {
if (!gst_h264_parse_hrd_parameters (&vui->nal_hrd_parameters, reader))
goto error;
}
READ_UINT8 (reader, vui->vcl_hrd_parameters_present_flag, 1);
if (vui->vcl_hrd_parameters_present_flag) {
if (!gst_h264_parse_hrd_parameters (&vui->vcl_hrd_parameters, reader))
goto error;
}
if (vui->nal_hrd_parameters_present_flag ||
vui->vcl_hrd_parameters_present_flag)
READ_UINT8 (reader, vui->low_delay_hrd_flag, 1);
READ_UINT8 (reader, vui->pic_struct_present_flag, 1);
return TRUE;
error:
GST_WARNING ("error parsing \"VUI Parameters\"");
return FALSE;
}
static gboolean
gst_h264_parser_parse_scaling_list (GstNalReader * reader,
guint8 scaling_lists_4x4[6][16], 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)
{
guint i;
GST_DEBUG ("parsing scaling lists");
for (i = 0; i < 12; i++) {
gboolean use_default = FALSE;
if (i < n_lists) {
guint8 scaling_list_present_flag;
READ_UINT8 (reader, scaling_list_present_flag, 1);
if (scaling_list_present_flag) {
guint8 *scaling_list;
const guint8 *scan;
guint size;
guint j;
guint8 last_scale, next_scale;
if (i < 6) {
scaling_list = scaling_lists_4x4[i];
scan = zigzag_4x4;
size = 16;
} else {
scaling_list = scaling_lists_8x8[i - 6];
scan = zigzag_8x8;
size = 64;
}
last_scale = 8;
next_scale = 8;
for (j = 0; j < size; j++) {
if (next_scale != 0) {
gint32 delta_scale;
READ_SE (reader, delta_scale);
next_scale = (last_scale + delta_scale) & 0xff;
}
if (j == 0 && next_scale == 0) {
use_default = TRUE;
break;
}
last_scale = scaling_list[scan[j]] =
(next_scale == 0) ? last_scale : next_scale;
}
} else
use_default = TRUE;
} else
use_default = TRUE;
if (use_default) {
switch (i) {
case 0:
memcpy (scaling_lists_4x4[0], fallback_4x4_intra, 16);
break;
case 1:
memcpy (scaling_lists_4x4[1], scaling_lists_4x4[0], 16);
break;
case 2:
memcpy (scaling_lists_4x4[2], scaling_lists_4x4[1], 16);
break;
case 3:
memcpy (scaling_lists_4x4[3], fallback_4x4_inter, 16);
break;
case 4:
memcpy (scaling_lists_4x4[4], scaling_lists_4x4[3], 16);
break;
case 5:
memcpy (scaling_lists_4x4[5], scaling_lists_4x4[4], 16);
break;
case 6:
memcpy (scaling_lists_8x8[0], fallback_8x8_intra, 64);
break;
case 7:
memcpy (scaling_lists_8x8[1], fallback_8x8_inter, 64);
break;
case 8:
memcpy (scaling_lists_8x8[2], scaling_lists_8x8[0], 64);
break;
case 9:
memcpy (scaling_lists_8x8[3], scaling_lists_8x8[1], 64);
break;
case 10:
memcpy (scaling_lists_8x8[4], scaling_lists_8x8[2], 64);
break;
case 11:
memcpy (scaling_lists_8x8[5], scaling_lists_8x8[3], 64);
break;
default:
break;
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing scaling lists");
return FALSE;
}
GstH264Sequence *
gst_h264_parser_parse_sequence (GstH264Parser * parser, guint8 * data,
guint size)
{
GstNalReader reader = GST_NAL_READER_INIT (data, size);
GstH264Sequence *seq;
guint8 frame_cropping_flag;
g_return_val_if_fail (GST_IS_H264_PARSER (parser), NULL);
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (size > 0, NULL);
GST_DEBUG ("parsing \"Sequence parameter set\"");
seq = g_slice_new (GstH264Sequence);
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
seq->chroma_format_idc = 1;
seq->separate_colour_plane_flag = 0;
seq->bit_depth_luma_minus8 = 0;
seq->bit_depth_chroma_minus8 = 0;
memset (seq->scaling_lists_4x4, 16, 96);
memset (seq->scaling_lists_8x8, 16, 384);
seq->mb_adaptive_frame_field_flag = 0;
seq->frame_crop_left_offset = 0;
seq->frame_crop_right_offset = 0;
seq->frame_crop_top_offset = 0;
seq->frame_crop_bottom_offset = 0;
READ_UINT8 (&reader, seq->profile_idc, 8);
READ_UINT8 (&reader, seq->constraint_set0_flag, 1);
READ_UINT8 (&reader, seq->constraint_set1_flag, 1);
READ_UINT8 (&reader, seq->constraint_set2_flag, 1);
READ_UINT8 (&reader, seq->constraint_set3_flag, 1);
/* skip reserved_zero_4bits */
if (!gst_nal_reader_skip (&reader, 4))
goto error;
READ_UINT8 (&reader, seq->level_idc, 8);
READ_UE_ALLOWED (&reader, seq->id, 0, 31);
if (seq->profile_idc == 100 || seq->profile_idc == 110 ||
seq->profile_idc == 122 || seq->profile_idc == 244 ||
seq->profile_idc == 44 || seq->profile_idc == 83 ||
seq->profile_idc == 86) {
READ_UE_ALLOWED (&reader, seq->chroma_format_idc, 0, 3);
if (seq->chroma_format_idc == 3)
READ_UINT8 (&reader, seq->separate_colour_plane_flag, 1);
READ_UE_ALLOWED (&reader, seq->bit_depth_luma_minus8, 0, 6);
READ_UE_ALLOWED (&reader, seq->bit_depth_chroma_minus8, 0, 6);
READ_UINT8 (&reader, seq->qpprime_y_zero_transform_bypass_flag, 1);
READ_UINT8 (&reader, seq->scaling_matrix_present_flag, 1);
if (seq->scaling_matrix_present_flag) {
guint8 n_lists;
n_lists = (seq->chroma_format_idc != 3) ? 8 : 12;
if (!gst_h264_parser_parse_scaling_list (&reader,
seq->scaling_lists_4x4, seq->scaling_lists_8x8,
default_4x4_inter, default_4x4_intra,
default_8x8_inter, default_8x8_intra, n_lists))
goto error;
}
}
READ_UE_ALLOWED (&reader, seq->log2_max_frame_num_minus4, 0, 12);
/* calculate MaxFrameNum */
seq->MaxFrameNum = 1 << (seq->log2_max_frame_num_minus4 + 4);
READ_UE_ALLOWED (&reader, seq->pic_order_cnt_type, 0, 2);
if (seq->pic_order_cnt_type == 0) {
READ_UE_ALLOWED (&reader, seq->log2_max_pic_order_cnt_lsb_minus4, 0, 12);
} else if (seq->pic_order_cnt_type == 1) {
guint i;
READ_UINT8 (&reader, seq->delta_pic_order_always_zero_flag, 1);
READ_SE (&reader, seq->offset_for_non_ref_pic);
READ_SE (&reader, seq->offset_for_top_to_bottom_field);
READ_UE_ALLOWED (&reader, seq->num_ref_frames_in_pic_order_cnt_cycle, 0,
255);
for (i = 0; i < seq->num_ref_frames_in_pic_order_cnt_cycle; i++)
READ_SE (&reader, seq->offset_for_ref_frame[i]);
}
READ_UE (&reader, seq->num_ref_frames);
READ_UINT8 (&reader, seq->gaps_in_frame_num_value_allowed_flag, 1);
READ_UE (&reader, seq->pic_width_in_mbs_minus1);
READ_UE (&reader, seq->pic_height_in_map_units_minus1);
READ_UINT8 (&reader, seq->frame_mbs_only_flag, 1);
if (!seq->frame_mbs_only_flag)
READ_UINT8 (&reader, seq->mb_adaptive_frame_field_flag, 1);
READ_UINT8 (&reader, seq->direct_8x8_inference_flag, 1);
READ_UINT8 (&reader, frame_cropping_flag, 1);
if (frame_cropping_flag) {
READ_UE (&reader, seq->frame_crop_left_offset);
READ_UE (&reader, seq->frame_crop_right_offset);
READ_UE (&reader, seq->frame_crop_top_offset);
READ_UE (&reader, seq->frame_crop_bottom_offset);
}
READ_UINT8 (&reader, seq->vui_parameters_present_flag, 1);
if (seq->vui_parameters_present_flag) {
if (!gst_h264_parse_vui_parameters (&seq->vui_parameters, &reader))
goto error;
}
/* calculate ChromaArrayType */
if (seq->separate_colour_plane_flag)
seq->ChromaArrayType = 0;
else
seq->ChromaArrayType = seq->chroma_format_idc;
GST_DEBUG ("adding sequence parameter set with id: %d to hash table",
seq->id);
g_hash_table_replace (parser->sequences, &seq->id, seq);
return seq;
error:
GST_WARNING ("error parsing \"Sequence parameter set\"");
gst_h264_sequence_free (seq);
return NULL;
}
static void
gst_h264_picture_free (void *data)
{
GstH264Picture *pic = (GstH264Picture *) data;
if (pic->slice_group_id)
g_free (pic->slice_group_id);
g_slice_free (GstH264Picture, data);
}
static gboolean
gst_h264_parser_more_data (GstNalReader * reader)
{
guint remaining;
remaining = gst_nal_reader_get_remaining (reader);
if (remaining == 0)
return FALSE;
if (remaining <= 8) {
guint8 rbsp_stop_one_bit;
if (!gst_nal_reader_peek_bits_uint8 (reader, &rbsp_stop_one_bit, 1))
return FALSE;
if (rbsp_stop_one_bit == 1) {
guint8 zero_bits;
if (remaining == 1)
return FALSE;
if (!gst_nal_reader_peek_bits_uint8 (reader, &zero_bits, remaining))
return FALSE;
if ((zero_bits - (1 << (remaining - 1))) == 0)
return FALSE;
}
}
return TRUE;
}
GstH264Picture *
gst_h264_parser_parse_picture (GstH264Parser * parser, guint8 * data,
guint size)
{
GstNalReader reader = GST_NAL_READER_INIT (data, size);
GstH264Picture *pic;
gint seq_parameter_set_id;
GstH264Sequence *seq;
guint8 pic_scaling_matrix_present_flag;
g_return_val_if_fail (GST_IS_H264_PARSER (parser), NULL);
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (size > 0, NULL);
GST_DEBUG ("parsing \"Picture parameter set\"");
pic = g_slice_new (GstH264Picture);
READ_UE_ALLOWED (&reader, pic->id, 0, 255);
READ_UE_ALLOWED (&reader, seq_parameter_set_id, 0, 31);
seq = g_hash_table_lookup (parser->sequences, &seq_parameter_set_id);
if (!seq) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
seq_parameter_set_id);
goto error;
}
pic->sequence = seq;
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
pic->slice_group_id = NULL;
pic->transform_8x8_mode_flag = 0;
memcpy (&pic->scaling_lists_4x4, &seq->scaling_lists_4x4, 96);
memcpy (&pic->scaling_lists_8x8, &seq->scaling_lists_8x8, 384);
READ_UINT8 (&reader, pic->entropy_coding_mode_flag, 1);
READ_UINT8 (&reader, pic->pic_order_present_flag, 1);
READ_UE_ALLOWED (&reader, pic->num_slice_groups_minus1, 0, 7);
if (pic->num_slice_groups_minus1 > 0) {
READ_UE_ALLOWED (&reader, pic->slice_group_map_type, 0, 6);
if (pic->slice_group_map_type == 0) {
gint i;
for (i = 0; i <= pic->num_slice_groups_minus1; i++)
READ_UE (&reader, pic->run_length_minus1[i]);
} else if (pic->slice_group_map_type == 2) {
gint i;
for (i = 0; i <= pic->num_slice_groups_minus1; i++) {
READ_UE (&reader, pic->top_left[i]);
READ_UE (&reader, pic->bottom_right[i]);
}
} else if (pic->slice_group_map_type >= 3 && pic->slice_group_map_type <= 5) {
READ_UINT8 (&reader, pic->slice_group_change_direction_flag, 1);
READ_UE (&reader, pic->slice_group_change_rate_minus1);
} else if (pic->slice_group_map_type == 6) {
gint bits;
gint i;
READ_UE (&reader, pic->pic_size_in_map_units_minus1);
bits = g_bit_storage (pic->num_slice_groups_minus1);
pic->slice_group_id =
g_new (guint8, pic->pic_size_in_map_units_minus1 + 1);
for (i = 0; i <= pic->pic_size_in_map_units_minus1; i++)
READ_UINT8 (&reader, pic->slice_group_id[i], bits);
}
}
READ_UE_ALLOWED (&reader, pic->num_ref_idx_l0_active_minus1, 0, 31);
READ_UE_ALLOWED (&reader, pic->num_ref_idx_l1_active_minus1, 0, 31);
READ_UINT8 (&reader, pic->weighted_pred_flag, 1);
READ_UINT8 (&reader, pic->weighted_bipred_idc, 2);
READ_SE_ALLOWED (&reader, pic->pic_init_qp_minus26, -26, 25);
READ_SE_ALLOWED (&reader, pic->pic_init_qs_minus26, -26, 25);
READ_SE_ALLOWED (&reader, pic->chroma_qp_index_offset, -12, 12);
pic->second_chroma_qp_index_offset = pic->chroma_qp_index_offset;
READ_UINT8 (&reader, pic->deblocking_filter_control_present_flag, 1);
READ_UINT8 (&reader, pic->constrained_intra_pred_flag, 1);
READ_UINT8 (&reader, pic->redundant_pic_cnt_present_flag, 1);
if (!gst_h264_parser_more_data (&reader))
goto done;
READ_UINT8 (&reader, pic->transform_8x8_mode_flag, 1);
READ_UINT8 (&reader, pic_scaling_matrix_present_flag, 1);
if (pic_scaling_matrix_present_flag) {
guint8 n_lists;
n_lists = 6 + ((seq->chroma_format_idc != 3) ? 2 : 6) *
pic->transform_8x8_mode_flag;
if (seq->scaling_matrix_present_flag) {
if (!gst_h264_parser_parse_scaling_list (&reader,
pic->scaling_lists_4x4, pic->scaling_lists_8x8,
seq->scaling_lists_4x4[0], seq->scaling_lists_4x4[3],
seq->scaling_lists_8x8[0], seq->scaling_lists_8x8[3], n_lists))
goto error;
} else {
if (!gst_h264_parser_parse_scaling_list (&reader,
pic->scaling_lists_4x4, pic->scaling_lists_8x8,
default_4x4_inter, default_4x4_intra,
default_8x8_inter, default_8x8_intra, n_lists))
goto error;
}
}
READ_SE_ALLOWED (&reader, pic->second_chroma_qp_index_offset, -12, 12);
done:
GST_DEBUG ("adding picture parameter set with id: %d to hash table", pic->id);
g_hash_table_replace (parser->pictures, &pic->id, pic);
return pic;
error:
GST_WARNING ("error parsing \"Picture parameter set\"");
gst_h264_picture_free (pic);
return NULL;
}
static gboolean
gst_h264_slice_parse_pred_weight_table (GstH264Slice * slice,
GstNalReader * reader,
const GstH264Sequence * seq, const GstH264Picture * pic)
{
GstH264PredWeightTable *p;
gint i;
GST_DEBUG ("parsing \"Prediction weight table\"");
p = &slice->pred_weight_table;
READ_UE_ALLOWED (reader, p->luma_log2_weight_denom, 0, 7);
/* set default values */
memset (p->luma_weight_l0, 1 << p->luma_log2_weight_denom, 32);
memset (p->luma_offset_l0, 0, 32);
if (seq->ChromaArrayType != 0) {
READ_UE_ALLOWED (reader, p->chroma_log2_weight_denom, 0, 7);
/* set default values */
memset (p->chroma_weight_l0, 1 << p->chroma_log2_weight_denom, 64);
memset (p->chroma_offset_l0, 0, 64);
}
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
guint8 luma_weight_l0_flag;
READ_UINT8 (reader, luma_weight_l0_flag, 1);
if (luma_weight_l0_flag) {
READ_SE_ALLOWED (reader, p->luma_weight_l0[i], -128, 127);
READ_SE_ALLOWED (reader, p->luma_offset_l0[i], -128, 127);
}
if (seq->ChromaArrayType != 0) {
guint8 chroma_weight_l0_flag;
gint j;
READ_UINT8 (reader, chroma_weight_l0_flag, 1);
if (chroma_weight_l0_flag) {
for (j = 0; j < 2; j++) {
READ_SE_ALLOWED (reader, p->chroma_weight_l0[i][j], -128, 127);
READ_SE_ALLOWED (reader, p->chroma_offset_l0[i][j], -128, 127);
}
}
}
}
if (GST_H264_IS_B_SLICE (slice->type)) {
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++) {
guint8 luma_weight_l1_flag;
READ_UINT8 (reader, luma_weight_l1_flag, 1);
if (luma_weight_l1_flag) {
READ_SE_ALLOWED (reader, p->luma_weight_l1[i], -128, 127);
READ_SE_ALLOWED (reader, p->luma_offset_l1[i], -128, 127);
}
if (seq->ChromaArrayType != 0) {
guint8 chroma_weight_l1_flag;
gint j;
READ_UINT8 (reader, chroma_weight_l1_flag, 1);
if (chroma_weight_l1_flag) {
for (j = 0; j < 2; j++) {
READ_SE_ALLOWED (reader, p->chroma_weight_l1[i][j], -128, 127);
READ_SE_ALLOWED (reader, p->chroma_offset_l1[i][j], -128, 127);
}
}
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Prediction weight table\"");
return FALSE;
}
static gboolean
gst_h264_slice_parse_ref_pic_list_reordering (GstH264Slice * slice,
GstNalReader * reader)
{
GST_DEBUG ("parsing \"Reference picture list reordering\"");
if (!GST_H264_IS_I_SLICE (slice->type) && !GST_H264_IS_SI_SLICE (slice->type)) {
guint8 ref_pic_list_reordering_flag_l0;
guint8 reordering_of_pic_nums_idc;
READ_UINT8 (reader, ref_pic_list_reordering_flag_l0, 1);
if (ref_pic_list_reordering_flag_l0)
do {
READ_UE_ALLOWED (reader, reordering_of_pic_nums_idc, 0, 3);
if (reordering_of_pic_nums_idc == 0 || reordering_of_pic_nums_idc == 1) {
guint32 abs_diff_pic_num_minus1;
READ_UE_ALLOWED (reader, abs_diff_pic_num_minus1, 0,
slice->MaxPicNum - 1);
} else if (reordering_of_pic_nums_idc == 2) {
guint32 long_term_pic_num;
READ_UE (reader, long_term_pic_num);
}
} while (reordering_of_pic_nums_idc != 3);
}
if (GST_H264_IS_B_SLICE (slice->type)) {
guint8 ref_pic_list_reordering_flag_l1;
guint8 reordering_of_pic_nums_idc;
READ_UINT8 (reader, ref_pic_list_reordering_flag_l1, 1);
if (ref_pic_list_reordering_flag_l1)
do {
READ_UE_ALLOWED (reader, reordering_of_pic_nums_idc, 0, 3);
if (reordering_of_pic_nums_idc == 0 || reordering_of_pic_nums_idc == 1) {
guint32 abs_diff_num_minus1;
READ_UE (reader, abs_diff_num_minus1);
} else if (reordering_of_pic_nums_idc == 2) {
guint32 long_term_pic_num;
READ_UE (reader, long_term_pic_num);
}
} while (reordering_of_pic_nums_idc != 3);
}
return TRUE;
error:
GST_WARNING ("error parsing \"Reference picture list reordering\"");
return FALSE;
}
static gboolean
gst_h264_slice_parse_dec_ref_pic_marking (GstH264Slice * slice,
GstNalReader * reader)
{
GstH264DecRefPicMarking *m;
GST_DEBUG ("parsing \"Decoded reference picture marking\"");
m = &slice->dec_ref_pic_marking;
if (slice->nal_unit.IdrPicFlag) {
READ_UINT8 (reader, m->no_output_of_prior_pics_flag, 1);
READ_UINT8 (reader, m->long_term_reference_flag, 1);
} else {
READ_UINT8 (reader, m->adaptive_ref_pic_marking_mode_flag, 1);
if (m->adaptive_ref_pic_marking_mode_flag) {
guint8 memory_management_control_operation;
m->n_ref_pic_marking = 0;
while (1) {
READ_UE_ALLOWED (reader, memory_management_control_operation, 0, 6);
if (memory_management_control_operation == 0)
break;
m->ref_pic_marking[m->
n_ref_pic_marking].memory_management_control_operation =
memory_management_control_operation;
if (memory_management_control_operation == 1 ||
memory_management_control_operation == 3)
READ_UE (reader,
m->ref_pic_marking[m->
n_ref_pic_marking].difference_of_pic_nums_minus1);
if (memory_management_control_operation == 2)
READ_UE (reader,
m->ref_pic_marking[m->n_ref_pic_marking].long_term_pic_num);
if (memory_management_control_operation == 3 ||
memory_management_control_operation == 6)
READ_UE (reader,
m->ref_pic_marking[m->n_ref_pic_marking].long_term_frame_idx);
if (memory_management_control_operation == 4)
READ_UE (reader,
m->ref_pic_marking[m->
n_ref_pic_marking].max_long_term_frame_idx_plus1);
m->n_ref_pic_marking++;
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Decoded reference picture marking\"");
return FALSE;
}
gboolean
gst_h264_parser_parse_slice_header (GstH264Parser * parser,
GstH264Slice * slice, guint8 * data, guint size, GstNalUnit nal_unit)
{
GstNalReader reader = GST_NAL_READER_INIT (data, size);
gint pic_parameter_set_id;
GstH264Picture *pic;
GstH264Sequence *seq;
g_return_val_if_fail (GST_IS_H264_PARSER (parser), FALSE);
g_return_val_if_fail (slice != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (size > 0, FALSE);
GST_DEBUG ("parsing \"Slice header\"");
memcpy (&slice->nal_unit, &nal_unit, sizeof (GstNalUnit));
READ_UE (&reader, slice->first_mb_in_slice);
READ_UE (&reader, slice->type);
READ_UE_ALLOWED (&reader, pic_parameter_set_id, 0, 255);
pic = g_hash_table_lookup (parser->pictures, &pic_parameter_set_id);
if (!pic) {
GST_WARNING ("couldn't find associated picture parameter set with id: %d",
pic_parameter_set_id);
goto error;
}
slice->picture = pic;
seq = pic->sequence;
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
slice->field_pic_flag = 0;
slice->bottom_field_flag = 0;
slice->delta_pic_order_cnt_bottom = 0;
slice->delta_pic_order_cnt[0] = 0;
slice->delta_pic_order_cnt[1] = 0;
slice->redundant_pic_cnt = 0;
slice->num_ref_idx_l0_active_minus1 = pic->num_ref_idx_l0_active_minus1;
slice->num_ref_idx_l1_active_minus1 = pic->num_ref_idx_l1_active_minus1;
if (seq->separate_colour_plane_flag)
READ_UINT8 (&reader, slice->colour_plane_id, 2);
READ_UINT16 (&reader, slice->frame_num, seq->log2_max_frame_num_minus4 + 4);
if (!seq->frame_mbs_only_flag) {
READ_UINT8 (&reader, slice->field_pic_flag, 1);
if (slice->field_pic_flag)
READ_UINT8 (&reader, slice->bottom_field_flag, 1);
}
/* calculate MaxPicNum */
if (slice->field_pic_flag)
slice->MaxPicNum = seq->MaxFrameNum;
else
slice->MaxPicNum = 2 * seq->MaxFrameNum;
if (nal_unit.type == 5)
READ_UE_ALLOWED (&reader, slice->idr_pic_id, 0, 65535);
if (seq->pic_order_cnt_type == 0) {
READ_UINT16 (&reader, slice->pic_order_cnt_lsb,
seq->log2_max_pic_order_cnt_lsb_minus4 + 4);
if (pic->pic_order_present_flag && !slice->field_pic_flag)
READ_SE (&reader, slice->delta_pic_order_cnt_bottom);
}
if (seq->pic_order_cnt_type == 1 && !seq->delta_pic_order_always_zero_flag) {
READ_SE (&reader, slice->delta_pic_order_cnt[0]);
if (pic->pic_order_present_flag && !slice->field_pic_flag)
READ_SE (&reader, slice->delta_pic_order_cnt[1]);
}
if (pic->redundant_pic_cnt_present_flag)
READ_UE_ALLOWED (&reader, slice->redundant_pic_cnt, 0, 127);
if (GST_H264_IS_B_SLICE (slice->type))
READ_UINT8 (&reader, slice->direct_spatial_mv_pred_flag, 1);
if (GST_H264_IS_P_SLICE (slice->type) ||
GST_H264_IS_SP_SLICE (slice->type) || GST_H264_IS_B_SLICE (slice->type)) {
guint8 num_ref_idx_active_override_flag;
READ_UINT8 (&reader, num_ref_idx_active_override_flag, 1);
if (num_ref_idx_active_override_flag) {
READ_UE_ALLOWED (&reader, slice->num_ref_idx_l0_active_minus1, 0, 31);
if (GST_H264_IS_B_SLICE (slice->type))
READ_UE_ALLOWED (&reader, slice->num_ref_idx_l1_active_minus1, 0, 31);
}
}
if (!gst_h264_slice_parse_ref_pic_list_reordering (slice, &reader))
return FALSE;
if ((pic->weighted_pred_flag && (GST_H264_IS_P_SLICE (slice->type) ||
GST_H264_IS_SP_SLICE (slice->type)))
|| (pic->weighted_bipred_idc == 1 && GST_H264_IS_B_SLICE (slice->type))) {
if (!gst_h264_slice_parse_pred_weight_table (slice, &reader, seq, pic))
return FALSE;
}
if (nal_unit.ref_idc != 0) {
if (!gst_h264_slice_parse_dec_ref_pic_marking (slice, &reader))
return FALSE;
}
return TRUE;
error:
GST_WARNING ("error parsing \"Slice header\"");
return FALSE;
}
static gboolean
gst_h264_parser_parse_buffering_period (GstH264Parser * parser,
GstH264BufferingPeriod * per, guint8 * data, guint size)
{
GstNalReader reader = GST_NAL_READER_INIT (data, size);
GstH264Sequence *seq;
guint8 seq_parameter_set_id;
GST_DEBUG ("parsing \"Buffering period\"");
READ_UE_ALLOWED (&reader, seq_parameter_set_id, 0, 31);
seq = g_hash_table_lookup (parser->sequences, &seq_parameter_set_id);
if (!seq) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
seq_parameter_set_id);
goto error;
}
per->seq = seq;
if (seq->vui_parameters_present_flag) {
GstH264VUIParameters *vui = &seq->vui_parameters;
if (vui->nal_hrd_parameters_present_flag) {
GstH264HRDParameters *hrd = &vui->nal_hrd_parameters;
guint8 SchedSelIdx;
for (SchedSelIdx = 0; SchedSelIdx <= hrd->cpb_cnt_minus1; SchedSelIdx++) {
READ_UINT8 (&reader, per->nal_initial_cpb_removal_delay[SchedSelIdx],
5);
READ_UINT8 (&reader,
per->nal_initial_cpb_removal_delay_offset[SchedSelIdx], 5);
}
}
if (vui->vcl_hrd_parameters_present_flag) {
GstH264HRDParameters *hrd = &vui->vcl_hrd_parameters;
guint8 SchedSelIdx;
for (SchedSelIdx = 0; SchedSelIdx <= hrd->cpb_cnt_minus1; SchedSelIdx++) {
READ_UINT8 (&reader, per->vcl_initial_cpb_removal_delay[SchedSelIdx],
5);
READ_UINT8 (&reader,
per->vcl_initial_cpb_removal_delay_offset[SchedSelIdx], 5);
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Buffering period\"");
return FALSE;
}
static gboolean
gst_h264_parse_clock_timestamp (GstH264ClockTimestamp * tim,
GstH264VUIParameters * vui, GstNalReader * reader)
{
guint8 full_timestamp_flag;
guint8 time_offset_length;
GST_DEBUG ("parsing \"Clock timestamp\"");
/* defalt values */
tim->time_offset = 0;
READ_UINT8 (reader, tim->ct_type, 2);
READ_UINT8 (reader, tim->nuit_field_based_flag, 1);
READ_UINT8 (reader, tim->counting_type, 5);
READ_UINT8 (reader, full_timestamp_flag, 1);
READ_UINT8 (reader, tim->discontinuity_flag, 1);
READ_UINT8 (reader, tim->cnt_dropped_flag, 1);
READ_UINT8 (reader, tim->n_frames, 8);
if (full_timestamp_flag) {
tim->seconds_flag = TRUE;
READ_UINT8 (reader, tim->seconds_value, 6);
tim->minutes_flag = TRUE;
READ_UINT8 (reader, tim->minutes_value, 6);
tim->hours_flag = TRUE;
READ_UINT8 (reader, tim->hours_value, 5);
} else {
READ_UINT8 (reader, tim->seconds_flag, 1);
if (tim->seconds_flag) {
READ_UINT8 (reader, tim->seconds_value, 6);
READ_UINT8 (reader, tim->minutes_flag, 1);
if (tim->minutes_flag) {
READ_UINT8 (reader, tim->minutes_value, 6);
READ_UINT8 (reader, tim->hours_flag, 1);
if (tim->hours_flag)
READ_UINT8 (reader, tim->hours_value, 5);
}
}
}
time_offset_length = 0;
if (vui->nal_hrd_parameters_present_flag)
time_offset_length = vui->nal_hrd_parameters.time_offset_length;
else if (vui->vcl_hrd_parameters_present_flag)
time_offset_length = vui->vcl_hrd_parameters.time_offset_length;
if (time_offset_length > 0)
READ_UINT32 (reader, tim->time_offset, time_offset_length);
error:
GST_WARNING ("error parsing \"Clock timestamp\"");
return FALSE;
}
static gboolean
gst_h264_parser_parse_pic_timing (GstH264Parser * parser, GstH264Sequence * seq,
GstH264PicTiming * tim, guint8 * data, guint size)
{
GstNalReader reader = GST_NAL_READER_INIT (data, size);
GST_DEBUG ("parsing \"Picture timing\"");
if (!seq) {
GST_WARNING ("didn't get the associated sequence paramater set for the "
"current access unit");
goto error;
}
/* default values */
memset (tim->clock_timestamp_flag, 0, 3);
if (seq->vui_parameters_present_flag) {
GstH264VUIParameters *vui = &seq->vui_parameters;
if (vui->nal_hrd_parameters_present_flag) {
READ_UINT8 (&reader, tim->cpb_removal_delay,
vui->nal_hrd_parameters.cpb_removal_delay_length_minus1 + 1);
READ_UINT8 (&reader, tim->dpb_output_delay,
vui->nal_hrd_parameters.dpb_output_delay_length_minus1 + 1);
} else if (vui->nal_hrd_parameters_present_flag) {
READ_UINT8 (&reader, tim->cpb_removal_delay,
vui->vcl_hrd_parameters.cpb_removal_delay_length_minus1 + 1);
READ_UINT8 (&reader, tim->dpb_output_delay,
vui->vcl_hrd_parameters.dpb_output_delay_length_minus1 + 1);
}
if (vui->pic_struct_present_flag) {
const guint8 num_clock_ts_table[9] = {
1, 1, 1, 2, 2, 3, 3, 2, 3
};
guint8 NumClockTs;
guint i;
READ_UINT8 (&reader, tim->pic_struct, 4);
CHECK_ALLOWED (tim->pic_struct, 0, 8);
NumClockTs = num_clock_ts_table[tim->pic_struct];
for (i = 0; i < NumClockTs; i++) {
READ_UINT8 (&reader, tim->clock_timestamp_flag[i], 1);
if (tim->clock_timestamp_flag[i]) {
if (!gst_h264_parse_clock_timestamp (&tim->clock_timestamp[i], vui,
&reader))
goto error;
}
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Picture timing\"");
return FALSE;
}
gboolean
gst_h264_parser_parse_sei_message (GstH264Parser * parser,
GstH264Sequence * seq, GstH264SEIMessage * sei, guint8 * data, guint size)
{
GstNalReader reader;
guint32 payloadSize;
guint8 payload_type_byte, payload_size_byte;
guint8 *payload_data;
guint remaining, payload_size;
gboolean res;
g_return_val_if_fail (GST_IS_H264_PARSER (parser), FALSE);
g_return_val_if_fail (sei != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (size > 0, FALSE);
GST_DEBUG ("parsing \"Sei message\"");
gst_nal_reader_init (&reader, data, size);
sei->payloadType = 0;
do {
READ_UINT8 (&reader, payload_type_byte, 8);
sei->payloadType += payload_type_byte;
}
while (payload_type_byte == 0xff);
payloadSize = 0;
do {
READ_UINT8 (&reader, payload_size_byte, 8);
payloadSize += payload_size_byte;
}
while (payload_size_byte == 0xff);
payload_data = data + gst_nal_reader_get_pos (&reader) * 8;
remaining = gst_nal_reader_get_remaining (&reader) * 8;
payload_size = payloadSize < remaining ? payloadSize : remaining;
if (sei->payloadType == 0)
res =
gst_h264_parser_parse_buffering_period (parser,
&sei->buffering_period, payload_data, payload_size);
else if (sei->payloadType == 1)
res = gst_h264_parser_parse_pic_timing (parser, seq, &sei->pic_timing,
payload_data, payload_size);
else
res = TRUE;
return res;
error:
GST_WARNING ("error parsing \"Sei message\"");
return FALSE;
}
#undef CHECK_ALLOWED
#undef READ_UINT8
#undef READ_UINT16
#undef READ_UINT32
#undef READ_UINT64
#undef READ_UE
#undef READ_UE_ALLOWED
#undef READ_SE
#undef READ_SE_ALLOWED
static void
gst_h264_parser_init (GstH264Parser * object)
{
GstH264Parser *parser = GST_H264_PARSER (object);
parser->sequences = g_hash_table_new_full (g_int_hash, g_int_equal, NULL,
gst_h264_sequence_free);
parser->pictures = g_hash_table_new_full (g_int_hash, g_int_equal, NULL,
gst_h264_picture_free);
}
static void
gst_h264_parser_finalize (GObject * object)
{
GstH264Parser *parser = GST_H264_PARSER (object);
g_hash_table_destroy (parser->sequences);
g_hash_table_destroy (parser->pictures);
G_OBJECT_CLASS (gst_h264_parser_parent_class)->finalize (object);
}
static void
gst_h264_parser_class_init (GstH264ParserClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gst_h264_parser_finalize;
}
Reference in a new issue View git blame Copy permalink