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gstreamer/gst-libs/gst/codecparsers/gsth264parser.c
Sebastian Dröge ffa4d84e54 h2645parser: Catch overflows in AVC/HEVC NAL unit length calculations 
Offset and size are stored as 32 bit guint and might overflow when
adding the nal_length_size, so let's avoid that.

For the size this would happen if the AVC/HEVC NAL unit size happens to
be stored in 4 bytes and is 4294967292 or higher, which is likely
corrupted data anyway.

For the offset this is something for the caller of these functions to
take care of but is unlikely to happen as it would require parsing on a
>4GB buffer.

Allowing these overflows causes all kinds of follow-up bugs in the
h2645parse elements, ranging from infinite loops and memory leaks to
potential memory corruptions.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2103>
2021-03-24 09:22:48 +00:00

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/* Gstreamer
* Copyright (C) <2011> Intel Corporation
* Copyright (C) <2011> Collabora Ltd.
* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
*
* Some bits C-c,C-v'ed and s/4/3 from h264parse and videoparsers/h264parse.c:
* Copyright (C) <2010> Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
* Copyright (C) <2010> Collabora Multimedia
* Copyright (C) <2010> Nokia Corporation
*
* (C) 2005 Michal Benes <michal.benes@itonis.tv>
* (C) 2008 Wim Taymans <wim.taymans@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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gsth264parser
* @title: GstH264Parser
* @short_description: Convenience library for h264 video
* bitstream parsing.
*
* It offers bitstream parsing in both AVC (length-prefixed) and Annex B
* (0x000001 start code prefix) format. To identify a NAL unit in a bitstream
* and parse its headers, first call:
*
* * #gst_h264_parser_identify_nalu to identify a NAL unit in an Annex B type bitstream
*
* * #gst_h264_parser_identify_nalu_avc to identify a NAL unit in an AVC type bitstream
*
* The following functions are then available for parsing the structure of the
* #GstH264NalUnit, depending on the #GstH264NalUnitType:
*
* * From #GST_H264_NAL_SLICE to #GST_H264_NAL_SLICE_IDR: #gst_h264_parser_parse_slice_hdr
*
* * #GST_H264_NAL_SEI: #gst_h264_parser_parse_sei
*
* * #GST_H264_NAL_SPS: #gst_h264_parser_parse_sps
*
* * #GST_H264_NAL_PPS: #gst_h264_parser_parse_pps
*
* * Any other: #gst_h264_parser_parse_nal
*
* One of these functions *must* be called on every NAL unit in the bitstream,
* in order to keep the internal structures of the #GstH264NalParser up to
* date. It is legal to call #gst_h264_parser_parse_nal on NAL units of any
* type, if no special parsing of the current NAL unit is required by the
* application.
*
* For more details about the structures, look at the ITU-T H.264 and ISO/IEC 14496-10 – MPEG-4
* Part 10 specifications, available at:
*
* * ITU-T H.264: http://www.itu.int/rec/T-REC-H.264
*
* * ISO/IEC 14496-10: http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=56538
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "nalutils.h"
#include "gsth264parser.h"
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT gst_h264_debug_category_get()
static GstDebugCategory *
gst_h264_debug_category_get (void)
{
static gsize cat_gonce = 0;
if (g_once_init_enter (&cat_gonce)) {
GstDebugCategory *cat = NULL;
GST_DEBUG_CATEGORY_INIT (cat, "codecparsers_h264", 0, "h264 parse library");
g_once_init_leave (&cat_gonce, (gsize) cat);
}
return (GstDebugCategory *) cat_gonce;
}
#endif /* GST_DISABLE_GST_DEBUG */
/**** 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 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
};
static const guint8 zigzag_4x4[16] = {
0, 1, 4, 8,
5, 2, 3, 6,
9, 12, 13, 10,
7, 11, 14, 15,
};
typedef struct
{
guint par_n, par_d;
} PAR;
/* Table E-1 - Meaning of sample aspect ratio indicator (1..16) */
static const PAR aspect_ratios[17] = {
{0, 0},
{1, 1},
{12, 11},
{10, 11},
{16, 11},
{40, 33},
{24, 11},
{20, 11},
{32, 11},
{80, 33},
{18, 11},
{15, 11},
{64, 33},
{160, 99},
{4, 3},
{3, 2},
{2, 1}
};
/***** Utils ****/
#define EXTENDED_SAR 255
static GstH264SPS *
gst_h264_parser_get_sps (GstH264NalParser * nalparser, guint8 sps_id)
{
GstH264SPS *sps;
sps = &nalparser->sps[sps_id];
if (sps->valid)
return sps;
return NULL;
}
static GstH264PPS *
gst_h264_parser_get_pps (GstH264NalParser * nalparser, guint8 pps_id)
{
GstH264PPS *pps;
pps = &nalparser->pps[pps_id];
if (pps->valid)
return pps;
return NULL;
}
static gboolean
gst_h264_parse_nalu_header (GstH264NalUnit * nalu)
{
guint8 *data = nalu->data + nalu->offset;
guint8 svc_extension_flag;
GstBitReader br;
if (nalu->size < 1)
return FALSE;
nalu->type = (data[0] & 0x1f);
nalu->ref_idc = (data[0] & 0x60) >> 5;
nalu->idr_pic_flag = (nalu->type == 5 ? 1 : 0);
nalu->header_bytes = 1;
nalu->extension_type = GST_H264_NAL_EXTENSION_NONE;
switch (nalu->type) {
case GST_H264_NAL_PREFIX_UNIT:
case GST_H264_NAL_SLICE_EXT:
if (nalu->size < 4)
return FALSE;
gst_bit_reader_init (&br, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
svc_extension_flag = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
if (svc_extension_flag) { /* SVC */
nalu->extension_type = GST_H264_NAL_EXTENSION_SVC;
} else { /* MVC */
GstH264NalUnitExtensionMVC *const mvc = &nalu->extension.mvc;
nalu->extension_type = GST_H264_NAL_EXTENSION_MVC;
mvc->non_idr_flag = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
mvc->priority_id = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
mvc->view_id = gst_bit_reader_get_bits_uint16_unchecked (&br, 10);
mvc->temporal_id = gst_bit_reader_get_bits_uint8_unchecked (&br, 3);
mvc->anchor_pic_flag = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
mvc->inter_view_flag = gst_bit_reader_get_bits_uint8_unchecked (&br, 1);
/* Update IdrPicFlag (H.7.4.1.1) */
nalu->idr_pic_flag = !mvc->non_idr_flag;
}
nalu->header_bytes += 3;
break;
default:
break;
}
GST_DEBUG ("Nal type %u, ref_idc %u", nalu->type, nalu->ref_idc);
return TRUE;
}
/*
* gst_h264_pps_copy:
* @dst_pps: The destination #GstH264PPS to copy into
* @src_pps: The source #GstH264PPS to copy from
*
* Copies @src_pps into @dst_pps.
*
* Returns: %TRUE if everything went fine, %FALSE otherwise
*/
static gboolean
gst_h264_pps_copy (GstH264PPS * dst_pps, const GstH264PPS * src_pps)
{
g_return_val_if_fail (dst_pps != NULL, FALSE);
g_return_val_if_fail (src_pps != NULL, FALSE);
gst_h264_pps_clear (dst_pps);
*dst_pps = *src_pps;
if (src_pps->slice_group_id)
dst_pps->slice_group_id = g_memdup (src_pps->slice_group_id,
src_pps->pic_size_in_map_units_minus1 + 1);
return TRUE;
}
/* Copy MVC-specific data for subset SPS header */
static gboolean
gst_h264_sps_mvc_copy (GstH264SPS * dst_sps, const GstH264SPS * src_sps)
{
GstH264SPSExtMVC *const dst_mvc = &dst_sps->extension.mvc;
const GstH264SPSExtMVC *const src_mvc = &src_sps->extension.mvc;
guint i, j, k;
g_assert (dst_sps->extension_type == GST_H264_NAL_EXTENSION_MVC);
dst_mvc->num_views_minus1 = src_mvc->num_views_minus1;
dst_mvc->view = g_new0 (GstH264SPSExtMVCView, dst_mvc->num_views_minus1 + 1);
if (!dst_mvc->view)
return FALSE;
dst_mvc->view[0].view_id = src_mvc->view[0].view_id;
for (i = 1; i <= dst_mvc->num_views_minus1; i++) {
GstH264SPSExtMVCView *const dst_view = &dst_mvc->view[i];
const GstH264SPSExtMVCView *const src_view = &src_mvc->view[i];
dst_view->view_id = src_view->view_id;
dst_view->num_anchor_refs_l0 = src_view->num_anchor_refs_l0;
for (j = 0; j < dst_view->num_anchor_refs_l0; j++)
dst_view->anchor_ref_l0[j] = src_view->anchor_ref_l0[j];
dst_view->num_anchor_refs_l1 = src_view->num_anchor_refs_l1;
for (j = 0; j < dst_view->num_anchor_refs_l1; j++)
dst_view->anchor_ref_l1[j] = src_view->anchor_ref_l1[j];
dst_view->num_non_anchor_refs_l0 = src_view->num_non_anchor_refs_l0;
for (j = 0; j < dst_view->num_non_anchor_refs_l0; j++)
dst_view->non_anchor_ref_l0[j] = src_view->non_anchor_ref_l0[j];
dst_view->num_non_anchor_refs_l1 = src_view->num_non_anchor_refs_l1;
for (j = 0; j < dst_view->num_non_anchor_refs_l1; j++)
dst_view->non_anchor_ref_l1[j] = src_view->non_anchor_ref_l1[j];
}
dst_mvc->num_level_values_signalled_minus1 =
src_mvc->num_level_values_signalled_minus1;
dst_mvc->level_value = g_new0 (GstH264SPSExtMVCLevelValue,
dst_mvc->num_level_values_signalled_minus1 + 1);
if (!dst_mvc->level_value)
return FALSE;
for (i = 0; i <= dst_mvc->num_level_values_signalled_minus1; i++) {
GstH264SPSExtMVCLevelValue *const dst_value = &dst_mvc->level_value[i];
const GstH264SPSExtMVCLevelValue *const src_value =
&src_mvc->level_value[i];
dst_value->level_idc = src_value->level_idc;
dst_value->num_applicable_ops_minus1 = src_value->num_applicable_ops_minus1;
dst_value->applicable_op = g_new0 (GstH264SPSExtMVCLevelValueOp,
dst_value->num_applicable_ops_minus1 + 1);
if (!dst_value->applicable_op)
return FALSE;
for (j = 0; j <= dst_value->num_applicable_ops_minus1; j++) {
GstH264SPSExtMVCLevelValueOp *const dst_op = &dst_value->applicable_op[j];
const GstH264SPSExtMVCLevelValueOp *const src_op =
&src_value->applicable_op[j];
dst_op->temporal_id = src_op->temporal_id;
dst_op->num_target_views_minus1 = src_op->num_target_views_minus1;
dst_op->target_view_id =
g_new (guint16, dst_op->num_target_views_minus1 + 1);
if (!dst_op->target_view_id)
return FALSE;
for (k = 0; k <= dst_op->num_target_views_minus1; k++)
dst_op->target_view_id[k] = src_op->target_view_id[k];
dst_op->num_views_minus1 = src_op->num_views_minus1;
}
}
return TRUE;
}
/*
* gst_h264_sps_copy:
* @dst_sps: The destination #GstH264SPS to copy into
* @src_sps: The source #GstH264SPS to copy from
*
* Copies @src_sps into @dst_sps.
*
* Returns: %TRUE if everything went fine, %FALSE otherwise
*/
static gboolean
gst_h264_sps_copy (GstH264SPS * dst_sps, const GstH264SPS * src_sps)
{
g_return_val_if_fail (dst_sps != NULL, FALSE);
g_return_val_if_fail (src_sps != NULL, FALSE);
gst_h264_sps_clear (dst_sps);
*dst_sps = *src_sps;
switch (dst_sps->extension_type) {
case GST_H264_NAL_EXTENSION_MVC:
if (!gst_h264_sps_mvc_copy (dst_sps, src_sps))
return FALSE;
break;
}
return TRUE;
}
/****** Parsing functions *****/
static gboolean
gst_h264_parse_hrd_parameters (GstH264HRDParams * hrd, NalReader * nr)
{
guint sched_sel_idx;
GST_DEBUG ("parsing \"HRD Parameters\"");
READ_UE_MAX (nr, hrd->cpb_cnt_minus1, 31);
READ_UINT8 (nr, hrd->bit_rate_scale, 4);
READ_UINT8 (nr, hrd->cpb_size_scale, 4);
for (sched_sel_idx = 0; sched_sel_idx <= hrd->cpb_cnt_minus1; sched_sel_idx++) {
READ_UE (nr, hrd->bit_rate_value_minus1[sched_sel_idx]);
READ_UE (nr, hrd->cpb_size_value_minus1[sched_sel_idx]);
READ_UINT8 (nr, hrd->cbr_flag[sched_sel_idx], 1);
}
READ_UINT8 (nr, hrd->initial_cpb_removal_delay_length_minus1, 5);
READ_UINT8 (nr, hrd->cpb_removal_delay_length_minus1, 5);
READ_UINT8 (nr, hrd->dpb_output_delay_length_minus1, 5);
READ_UINT8 (nr, hrd->time_offset_length, 5);
return TRUE;
error:
GST_WARNING ("error parsing \"HRD Parameters\"");
return FALSE;
}
static gboolean
gst_h264_parse_vui_parameters (GstH264SPS * sps, NalReader * nr)
{
GstH264VUIParams *vui = &sps->vui_parameters;
GST_DEBUG ("parsing \"VUI Parameters\"");
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
vui->video_format = 5;
vui->colour_primaries = 2;
vui->transfer_characteristics = 2;
vui->matrix_coefficients = 2;
READ_UINT8 (nr, vui->aspect_ratio_info_present_flag, 1);
if (vui->aspect_ratio_info_present_flag) {
READ_UINT8 (nr, vui->aspect_ratio_idc, 8);
if (vui->aspect_ratio_idc == EXTENDED_SAR) {
READ_UINT16 (nr, vui->sar_width, 16);
READ_UINT16 (nr, vui->sar_height, 16);
vui->par_n = vui->sar_width;
vui->par_d = vui->sar_height;
} else if (vui->aspect_ratio_idc <= 16) {
vui->par_n = aspect_ratios[vui->aspect_ratio_idc].par_n;
vui->par_d = aspect_ratios[vui->aspect_ratio_idc].par_d;
}
}
READ_UINT8 (nr, vui->overscan_info_present_flag, 1);
if (vui->overscan_info_present_flag)
READ_UINT8 (nr, vui->overscan_appropriate_flag, 1);
READ_UINT8 (nr, vui->video_signal_type_present_flag, 1);
if (vui->video_signal_type_present_flag) {
READ_UINT8 (nr, vui->video_format, 3);
READ_UINT8 (nr, vui->video_full_range_flag, 1);
READ_UINT8 (nr, vui->colour_description_present_flag, 1);
if (vui->colour_description_present_flag) {
READ_UINT8 (nr, vui->colour_primaries, 8);
READ_UINT8 (nr, vui->transfer_characteristics, 8);
READ_UINT8 (nr, vui->matrix_coefficients, 8);
}
}
READ_UINT8 (nr, vui->chroma_loc_info_present_flag, 1);
if (vui->chroma_loc_info_present_flag) {
READ_UE_MAX (nr, vui->chroma_sample_loc_type_top_field, 5);
READ_UE_MAX (nr, vui->chroma_sample_loc_type_bottom_field, 5);
}
READ_UINT8 (nr, vui->timing_info_present_flag, 1);
if (vui->timing_info_present_flag) {
READ_UINT32 (nr, 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 (nr, 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 (nr, vui->fixed_frame_rate_flag, 1);
}
READ_UINT8 (nr, vui->nal_hrd_parameters_present_flag, 1);
if (vui->nal_hrd_parameters_present_flag) {
if (!gst_h264_parse_hrd_parameters (&vui->nal_hrd_parameters, nr))
goto error;
}
READ_UINT8 (nr, vui->vcl_hrd_parameters_present_flag, 1);
if (vui->vcl_hrd_parameters_present_flag) {
if (!gst_h264_parse_hrd_parameters (&vui->vcl_hrd_parameters, nr))
goto error;
}
if (vui->nal_hrd_parameters_present_flag ||
vui->vcl_hrd_parameters_present_flag)
READ_UINT8 (nr, vui->low_delay_hrd_flag, 1);
READ_UINT8 (nr, vui->pic_struct_present_flag, 1);
READ_UINT8 (nr, vui->bitstream_restriction_flag, 1);
if (vui->bitstream_restriction_flag) {
READ_UINT8 (nr, vui->motion_vectors_over_pic_boundaries_flag, 1);
READ_UE (nr, vui->max_bytes_per_pic_denom);
READ_UE_MAX (nr, vui->max_bits_per_mb_denom, 16);
READ_UE_MAX (nr, vui->log2_max_mv_length_horizontal, 16);
READ_UE_MAX (nr, vui->log2_max_mv_length_vertical, 16);
READ_UE (nr, vui->num_reorder_frames);
READ_UE (nr, vui->max_dec_frame_buffering);
}
return TRUE;
error:
GST_WARNING ("error parsing \"VUI Parameters\"");
return FALSE;
}
static gboolean
gst_h264_parser_parse_scaling_list (NalReader * nr,
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;
static const guint8 *default_lists[12] = {
default_4x4_intra, default_4x4_intra, default_4x4_intra,
default_4x4_inter, default_4x4_inter, default_4x4_inter,
default_8x8_intra, default_8x8_inter,
default_8x8_intra, default_8x8_inter,
default_8x8_intra, default_8x8_inter
};
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 (nr, scaling_list_present_flag, 1);
if (scaling_list_present_flag) {
guint8 *scaling_list;
guint size;
guint j;
guint8 last_scale, next_scale;
if (i < 6) {
scaling_list = scaling_lists_4x4[i];
size = 16;
} else {
scaling_list = scaling_lists_8x8[i - 6];
size = 64;
}
last_scale = 8;
next_scale = 8;
for (j = 0; j < size; j++) {
if (next_scale != 0) {
gint32 delta_scale;
READ_SE (nr, delta_scale);
next_scale = (last_scale + delta_scale) & 0xff;
}
if (j == 0 && next_scale == 0) {
/* Use default scaling lists (7.4.2.1.1.1) */
memcpy (scaling_list, default_lists[i], size);
break;
}
last_scale = scaling_list[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;
}
static gboolean
slice_parse_ref_pic_list_modification_1 (GstH264SliceHdr * slice,
NalReader * nr, guint list, gboolean is_mvc)
{
GstH264RefPicListModification *entries;
guint8 *ref_pic_list_modification_flag, *n_ref_pic_list_modification;
guint32 modification_of_pic_nums_idc;
gsize max_entries;
guint i = 0;
if (list == 0) {
entries = slice->ref_pic_list_modification_l0;
max_entries = G_N_ELEMENTS (slice->ref_pic_list_modification_l0);
ref_pic_list_modification_flag = &slice->ref_pic_list_modification_flag_l0;
n_ref_pic_list_modification = &slice->n_ref_pic_list_modification_l0;
} else {
entries = slice->ref_pic_list_modification_l1;
max_entries = G_N_ELEMENTS (slice->ref_pic_list_modification_l1);
ref_pic_list_modification_flag = &slice->ref_pic_list_modification_flag_l1;
n_ref_pic_list_modification = &slice->n_ref_pic_list_modification_l1;
}
READ_UINT8 (nr, *ref_pic_list_modification_flag, 1);
if (*ref_pic_list_modification_flag) {
while (1) {
READ_UE (nr, modification_of_pic_nums_idc);
if (modification_of_pic_nums_idc == 0 ||
modification_of_pic_nums_idc == 1) {
READ_UE_MAX (nr, entries[i].value.abs_diff_pic_num_minus1,
slice->max_pic_num - 1);
} else if (modification_of_pic_nums_idc == 2) {
READ_UE (nr, entries[i].value.long_term_pic_num);
} else if (is_mvc && (modification_of_pic_nums_idc == 4 ||
modification_of_pic_nums_idc == 5)) {
READ_UE (nr, entries[i].value.abs_diff_view_idx_minus1);
}
entries[i++].modification_of_pic_nums_idc = modification_of_pic_nums_idc;
if (modification_of_pic_nums_idc == 3)
break;
if (i >= max_entries)
goto error;
}
}
*n_ref_pic_list_modification = i;
return TRUE;
error:
GST_WARNING ("error parsing \"Reference picture list %u modification\"",
list);
return FALSE;
}
static gboolean
slice_parse_ref_pic_list_modification (GstH264SliceHdr * slice, NalReader * nr,
gboolean is_mvc)
{
if (!GST_H264_IS_I_SLICE (slice) && !GST_H264_IS_SI_SLICE (slice)) {
if (!slice_parse_ref_pic_list_modification_1 (slice, nr, 0, is_mvc))
return FALSE;
}
if (GST_H264_IS_B_SLICE (slice)) {
if (!slice_parse_ref_pic_list_modification_1 (slice, nr, 1, is_mvc))
return FALSE;
}
return TRUE;
}
static gboolean
gst_h264_slice_parse_dec_ref_pic_marking (GstH264SliceHdr * slice,
GstH264NalUnit * nalu, NalReader * nr)
{
GstH264DecRefPicMarking *dec_ref_pic_m;
guint start_pos;
GST_DEBUG ("parsing \"Decoded reference picture marking\"");
start_pos = nal_reader_get_pos (nr);
dec_ref_pic_m = &slice->dec_ref_pic_marking;
if (nalu->idr_pic_flag) {
READ_UINT8 (nr, dec_ref_pic_m->no_output_of_prior_pics_flag, 1);
READ_UINT8 (nr, dec_ref_pic_m->long_term_reference_flag, 1);
} else {
READ_UINT8 (nr, dec_ref_pic_m->adaptive_ref_pic_marking_mode_flag, 1);
if (dec_ref_pic_m->adaptive_ref_pic_marking_mode_flag) {
guint32 mem_mgmt_ctrl_op;
GstH264RefPicMarking *refpicmarking;
dec_ref_pic_m->n_ref_pic_marking = 0;
while (1) {
READ_UE (nr, mem_mgmt_ctrl_op);
if (mem_mgmt_ctrl_op == 0)
break;
if (dec_ref_pic_m->n_ref_pic_marking >=
G_N_ELEMENTS (dec_ref_pic_m->ref_pic_marking))
goto error;
refpicmarking =
&dec_ref_pic_m->ref_pic_marking[dec_ref_pic_m->n_ref_pic_marking];
refpicmarking->memory_management_control_operation = mem_mgmt_ctrl_op;
if (mem_mgmt_ctrl_op == 1 || mem_mgmt_ctrl_op == 3)
READ_UE (nr, refpicmarking->difference_of_pic_nums_minus1);
if (mem_mgmt_ctrl_op == 2)
READ_UE (nr, refpicmarking->long_term_pic_num);
if (mem_mgmt_ctrl_op == 3 || mem_mgmt_ctrl_op == 6)
READ_UE (nr, refpicmarking->long_term_frame_idx);
if (mem_mgmt_ctrl_op == 4)
READ_UE (nr, refpicmarking->max_long_term_frame_idx_plus1);
dec_ref_pic_m->n_ref_pic_marking++;
}
}
}
dec_ref_pic_m->bit_size = nal_reader_get_pos (nr) - start_pos;
return TRUE;
error:
GST_WARNING ("error parsing \"Decoded reference picture marking\"");
return FALSE;
}
static gboolean
gst_h264_slice_parse_pred_weight_table (GstH264SliceHdr * slice,
NalReader * nr, guint8 chroma_array_type)
{
GstH264PredWeightTable *p;
gint16 default_luma_weight, default_chroma_weight;
gint i;
GST_DEBUG ("parsing \"Prediction weight table\"");
p = &slice->pred_weight_table;
READ_UE_MAX (nr, p->luma_log2_weight_denom, 7);
/* set default values */
default_luma_weight = 1 << p->luma_log2_weight_denom;
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++)
p->luma_weight_l0[i] = default_luma_weight;
if (GST_H264_IS_B_SLICE (slice)) {
for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++)
p->luma_weight_l1[i] = default_luma_weight;
}
if (chroma_array_type != 0) {
READ_UE_MAX (nr, p->chroma_log2_weight_denom, 7);
/* set default values */
default_chroma_weight = 1 << p->chroma_log2_weight_denom;
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
p->chroma_weight_l0[i][0] = default_chroma_weight;
p->chroma_weight_l0[i][1] = default_chroma_weight;
}
if (GST_H264_IS_B_SLICE (slice)) {
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
p->chroma_weight_l1[i][0] = default_chroma_weight;
p->chroma_weight_l1[i][1] = default_chroma_weight;
}
}
}
for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
guint8 luma_weight_l0_flag;
READ_UINT8 (nr, luma_weight_l0_flag, 1);
if (luma_weight_l0_flag) {
READ_SE_ALLOWED (nr, p->luma_weight_l0[i], -128, 127);
READ_SE_ALLOWED (nr, p->luma_offset_l0[i], -128, 127);
}
if (chroma_array_type != 0) {
guint8 chroma_weight_l0_flag;
gint j;
READ_UINT8 (nr, chroma_weight_l0_flag, 1);
if (chroma_weight_l0_flag) {
for (j = 0; j < 2; j++) {
READ_SE_ALLOWED (nr, p->chroma_weight_l0[i][j], -128, 127);
READ_SE_ALLOWED (nr, 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;
READ_UINT8 (nr, luma_weight_l1_flag, 1);
if (luma_weight_l1_flag) {
READ_SE_ALLOWED (nr, p->luma_weight_l1[i], -128, 127);
READ_SE_ALLOWED (nr, p->luma_offset_l1[i], -128, 127);
}
if (chroma_array_type != 0) {
guint8 chroma_weight_l1_flag;
gint j;
READ_UINT8 (nr, chroma_weight_l1_flag, 1);
if (chroma_weight_l1_flag) {
for (j = 0; j < 2; j++) {
READ_SE_ALLOWED (nr, p->chroma_weight_l1[i][j], -128, 127);
READ_SE_ALLOWED (nr, p->chroma_offset_l1[i][j], -128, 127);
}
}
}
}
}
return TRUE;
error:
GST_WARNING ("error parsing \"Prediction weight table\"");
return FALSE;
}
static GstH264ParserResult
gst_h264_parser_parse_buffering_period (GstH264NalParser * nalparser,
GstH264BufferingPeriod * per, NalReader * nr)
{
GstH264SPS *sps;
guint8 sps_id;
GST_DEBUG ("parsing \"Buffering period\"");
READ_UE_MAX (nr, sps_id, GST_H264_MAX_SPS_COUNT - 1);
sps = gst_h264_parser_get_sps (nalparser, sps_id);
if (!sps) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
sps_id);
return GST_H264_PARSER_BROKEN_LINK;
}
per->sps = sps;
if (sps->vui_parameters_present_flag) {
GstH264VUIParams *vui = &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++) {
READ_UINT32 (nr, per->nal_initial_cpb_removal_delay[sched_sel_idx],
nbits);
READ_UINT32 (nr,
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++) {
READ_UINT32 (nr, per->vcl_initial_cpb_removal_delay[sched_sel_idx],
nbits);
READ_UINT32 (nr,
per->vcl_initial_cpb_removal_delay_offset[sched_sel_idx], nbits);
}
}
}
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Buffering period\"");
return GST_H264_PARSER_ERROR;
}
static gboolean
gst_h264_parse_clock_timestamp (GstH264ClockTimestamp * tim,
guint8 time_offset_length, NalReader * nr)
{
GST_DEBUG ("parsing \"Clock timestamp\"");
/* default values */
tim->time_offset = 0;
READ_UINT8 (nr, tim->ct_type, 2);
READ_UINT8 (nr, tim->nuit_field_based_flag, 1);
READ_UINT8 (nr, tim->counting_type, 5);
READ_UINT8 (nr, tim->full_timestamp_flag, 1);
READ_UINT8 (nr, tim->discontinuity_flag, 1);
READ_UINT8 (nr, tim->cnt_dropped_flag, 1);
READ_UINT8 (nr, tim->n_frames, 8);
if (tim->full_timestamp_flag) {
tim->seconds_flag = TRUE;
READ_UINT8 (nr, tim->seconds_value, 6);
tim->minutes_flag = TRUE;
READ_UINT8 (nr, tim->minutes_value, 6);
tim->hours_flag = TRUE;
READ_UINT8 (nr, tim->hours_value, 5);
} else {
READ_UINT8 (nr, tim->seconds_flag, 1);
if (tim->seconds_flag) {
READ_UINT8 (nr, tim->seconds_value, 6);
READ_UINT8 (nr, tim->minutes_flag, 1);
if (tim->minutes_flag) {
READ_UINT8 (nr, tim->minutes_value, 6);
READ_UINT8 (nr, tim->hours_flag, 1);
if (tim->hours_flag)
READ_UINT8 (nr, tim->hours_value, 5);
}
}
}
if (time_offset_length > 0)
READ_UINT32 (nr, tim->time_offset, time_offset_length);
return TRUE;
error:
GST_WARNING ("error parsing \"Clock timestamp\"");
return FALSE;
}
static GstH264ParserResult
gst_h264_parser_parse_pic_timing (GstH264NalParser * nalparser,
GstH264PicTiming * tim, NalReader * nr)
{
GstH264ParserResult error = GST_H264_PARSER_ERROR;
GST_DEBUG ("parsing \"Picture timing\"");
if (!nalparser->last_sps || !nalparser->last_sps->valid) {
GST_WARNING ("didn't get the associated sequence parameter set for the "
"current access unit");
error = GST_H264_PARSER_BROKEN_LINK;
goto error;
}
if (nalparser->last_sps->vui_parameters_present_flag) {
GstH264VUIParams *vui = &nalparser->last_sps->vui_parameters;
GstH264HRDParams *hrd = NULL;
if (vui->nal_hrd_parameters_present_flag) {
hrd = &vui->nal_hrd_parameters;
} else if (vui->vcl_hrd_parameters_present_flag) {
hrd = &vui->vcl_hrd_parameters;
}
tim->CpbDpbDelaysPresentFlag = ! !hrd;
tim->pic_struct_present_flag = vui->pic_struct_present_flag;
if (tim->CpbDpbDelaysPresentFlag) {
tim->cpb_removal_delay_length_minus1 =
hrd->cpb_removal_delay_length_minus1;
tim->dpb_output_delay_length_minus1 = hrd->dpb_output_delay_length_minus1;
READ_UINT32 (nr, tim->cpb_removal_delay,
tim->cpb_removal_delay_length_minus1 + 1);
READ_UINT32 (nr, 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;
READ_UINT8 (nr, tim->pic_struct, 4);
CHECK_ALLOWED ((gint8) tim->pic_struct, 0, 8);
tim->time_offset_length = 24;
if (hrd)
tim->time_offset_length = hrd->time_offset_length;
num_clock_num_ts = num_clock_ts_table[tim->pic_struct];
for (i = 0; i < num_clock_num_ts; i++) {
READ_UINT8 (nr, tim->clock_timestamp_flag[i], 1);
if (tim->clock_timestamp_flag[i]) {
if (!gst_h264_parse_clock_timestamp (&tim->clock_timestamp[i],
tim->time_offset_length, nr))
goto error;
}
}
}
}
if (!tim->CpbDpbDelaysPresentFlag && !tim->pic_struct_present_flag) {
GST_WARNING
("Invalid pic_timing SEI NAL with neither CpbDpbDelays nor pic_struct");
return GST_H264_PARSER_BROKEN_DATA;
}
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Picture timing\"");
return error;
}
static GstH264ParserResult
gst_h264_parser_parse_registered_user_data (GstH264NalParser * nalparser,
GstH264RegisteredUserData * rud, NalReader * nr, guint payload_size)
{
guint8 *data = NULL;
guint i;
rud->data = NULL;
rud->size = 0;
if (payload_size < 2) {
GST_WARNING ("Too small payload size %d", payload_size);
return GST_H264_PARSER_BROKEN_DATA;
}
READ_UINT8 (nr, rud->country_code, 8);
--payload_size;
if (rud->country_code == 0xFF) {
READ_UINT8 (nr, rud->country_code_extension, 8);
--payload_size;
} else {
rud->country_code_extension = 0;
}
if (payload_size < 1) {
GST_WARNING ("No more remaining payload data to store");
return GST_H264_PARSER_BROKEN_DATA;
}
data = g_malloc (payload_size);
for (i = 0; i < payload_size; ++i) {
READ_UINT8 (nr, data[i], 8);
}
GST_MEMDUMP ("SEI user data", data, payload_size);
rud->data = data;
rud->size = payload_size;
return GST_H264_PARSER_OK;
error:
{
GST_WARNING ("error parsing \"Registered User Data\"");
g_free (data);
return GST_H264_PARSER_ERROR;
}
}
static GstH264ParserResult
gst_h264_parser_parse_recovery_point (GstH264NalParser * nalparser,
GstH264RecoveryPoint * rp, NalReader * nr)
{
GstH264SPS *const sps = nalparser->last_sps;
GST_DEBUG ("parsing \"Recovery point\"");
if (!sps || !sps->valid) {
GST_WARNING ("didn't get the associated sequence parameter set for the "
"current access unit");
goto error;
}
READ_UE_MAX (nr, rp->recovery_frame_cnt, sps->max_frame_num - 1);
READ_UINT8 (nr, rp->exact_match_flag, 1);
READ_UINT8 (nr, rp->broken_link_flag, 1);
READ_UINT8 (nr, rp->changing_slice_group_idc, 2);
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Recovery point\"");
return GST_H264_PARSER_ERROR;
}
/* Parse SEI stereo_video_info() message */
static GstH264ParserResult
gst_h264_parser_parse_stereo_video_info (GstH264NalParser * nalparser,
GstH264StereoVideoInfo * info, NalReader * nr)
{
GST_DEBUG ("parsing \"Stereo Video info\"");
READ_UINT8 (nr, info->field_views_flag, 1);
if (info->field_views_flag) {
READ_UINT8 (nr, info->top_field_is_left_view_flag, 1);
} else {
READ_UINT8 (nr, info->current_frame_is_left_view_flag, 1);
READ_UINT8 (nr, info->next_frame_is_second_view_flag, 1);
}
READ_UINT8 (nr, info->left_view_self_contained_flag, 1);
READ_UINT8 (nr, info->right_view_self_contained_flag, 1);
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Stereo Video info\"");
return GST_H264_PARSER_ERROR;
}
/* Parse SEI frame_packing_arrangement() message */
static GstH264ParserResult
gst_h264_parser_parse_frame_packing (GstH264NalParser * nalparser,
GstH264FramePacking * frame_packing, NalReader * nr, guint payload_size)
{
guint8 frame_packing_extension_flag;
guint start_pos;
GST_DEBUG ("parsing \"Frame Packing Arrangement\"");
start_pos = nal_reader_get_pos (nr);
READ_UE (nr, frame_packing->frame_packing_id);
READ_UINT8 (nr, frame_packing->frame_packing_cancel_flag, 1);
if (!frame_packing->frame_packing_cancel_flag) {
READ_UINT8 (nr, frame_packing->frame_packing_type, 7);
READ_UINT8 (nr, frame_packing->quincunx_sampling_flag, 1);
READ_UINT8 (nr, frame_packing->content_interpretation_type, 6);
READ_UINT8 (nr, frame_packing->spatial_flipping_flag, 1);
READ_UINT8 (nr, frame_packing->frame0_flipped_flag, 1);
READ_UINT8 (nr, frame_packing->field_views_flag, 1);
READ_UINT8 (nr, frame_packing->current_frame_is_frame0_flag, 1);
READ_UINT8 (nr, frame_packing->frame0_self_contained_flag, 1);
READ_UINT8 (nr, frame_packing->frame1_self_contained_flag, 1);
if (!frame_packing->quincunx_sampling_flag &&
frame_packing->frame_packing_type !=
GST_H264_FRAME_PACKING_TEMPORAL_INTERLEAVING) {
READ_UINT8 (nr, frame_packing->frame0_grid_position_x, 4);
READ_UINT8 (nr, frame_packing->frame0_grid_position_y, 4);
READ_UINT8 (nr, frame_packing->frame1_grid_position_x, 4);
READ_UINT8 (nr, frame_packing->frame1_grid_position_y, 4);
}
/* Skip frame_packing_arrangement_reserved_byte */
if (!nal_reader_skip (nr, 8))
goto error;
READ_UE_MAX (nr, frame_packing->frame_packing_repetition_period, 16384);
}
READ_UINT8 (nr, frame_packing_extension_flag, 1);
/* All data that follows within a frame packing arrangement SEI message
after the value 1 for frame_packing_arrangement_extension_flag shall
be ignored (D.2.25) */
if (frame_packing_extension_flag) {
nal_reader_skip_long (nr,
payload_size - (nal_reader_get_pos (nr) - start_pos));
}
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Frame Packing Arrangement\"");
return GST_H264_PARSER_ERROR;
}
static GstH264ParserResult
gst_h264_parser_parse_mastering_display_colour_volume (GstH264NalParser *
parser, GstH264MasteringDisplayColourVolume * mdcv, NalReader * nr)
{
guint i;
GST_DEBUG ("parsing \"Mastering display colour volume\"");
for (i = 0; i < 3; i++) {
READ_UINT16 (nr, mdcv->display_primaries_x[i], 16);
READ_UINT16 (nr, mdcv->display_primaries_y[i], 16);
}
READ_UINT16 (nr, mdcv->white_point_x, 16);
READ_UINT16 (nr, mdcv->white_point_y, 16);
READ_UINT32 (nr, mdcv->max_display_mastering_luminance, 32);
READ_UINT32 (nr, mdcv->min_display_mastering_luminance, 32);
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Mastering display colour volume\"");
return GST_H264_PARSER_ERROR;
}
static GstH264ParserResult
gst_h264_parser_parse_content_light_level_info (GstH264NalParser * parser,
GstH264ContentLightLevel * cll, NalReader * nr)
{
GST_DEBUG ("parsing \"Content light level\"");
READ_UINT16 (nr, cll->max_content_light_level, 16);
READ_UINT16 (nr, cll->max_pic_average_light_level, 16);
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Content light level\"");
return GST_H264_PARSER_ERROR;
}
static GstH264ParserResult
gst_h264_parser_parse_sei_unhandled_payload (GstH264NalParser * parser,
GstH264SEIUnhandledPayload * payload, NalReader * nr, guint payload_type,
guint payload_size)
{
guint8 *data = NULL;
gint i;
payload->payloadType = payload_type;
data = g_malloc0 (payload_size);
for (i = 0; i < payload_size; ++i) {
READ_UINT8 (nr, data[i], 8);
}
payload->size = payload_size;
payload->data = data;
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Unhandled payload\"");
g_free (data);
return GST_H264_PARSER_ERROR;
}
static GstH264ParserResult
gst_h264_parser_parse_sei_message (GstH264NalParser * nalparser,
NalReader * nr, GstH264SEIMessage * sei)
{
guint32 payloadSize;
guint8 payload_type_byte, payload_size_byte;
guint remaining, payload_size, next;
GstH264ParserResult res;
GST_DEBUG ("parsing \"SEI message\"");
memset (sei, 0, sizeof (*sei));
do {
READ_UINT8 (nr, payload_type_byte, 8);
sei->payloadType += payload_type_byte;
} while (payload_type_byte == 0xff);
payloadSize = 0;
do {
READ_UINT8 (nr, payload_size_byte, 8);
payloadSize += payload_size_byte;
}
while (payload_size_byte == 0xff);
remaining = nal_reader_get_remaining (nr);
payload_size = payloadSize * 8 < remaining ? payloadSize * 8 : remaining;
next = nal_reader_get_pos (nr) + payload_size;
GST_DEBUG ("SEI message received: payloadType %u, payloadSize = %u bits",
sei->payloadType, payload_size);
switch (sei->payloadType) {
case GST_H264_SEI_BUF_PERIOD:
/* size not set; might depend on emulation_prevention_three_byte */
res = gst_h264_parser_parse_buffering_period (nalparser,
&sei->payload.buffering_period, nr);
break;
case GST_H264_SEI_PIC_TIMING:
/* size not set; might depend on emulation_prevention_three_byte */
res = gst_h264_parser_parse_pic_timing (nalparser,
&sei->payload.pic_timing, nr);
break;
case GST_H264_SEI_REGISTERED_USER_DATA:
res = gst_h264_parser_parse_registered_user_data (nalparser,
&sei->payload.registered_user_data, nr, payload_size >> 3);
break;
case GST_H264_SEI_RECOVERY_POINT:
res = gst_h264_parser_parse_recovery_point (nalparser,
&sei->payload.recovery_point, nr);
break;
case GST_H264_SEI_STEREO_VIDEO_INFO:
res = gst_h264_parser_parse_stereo_video_info (nalparser,
&sei->payload.stereo_video_info, nr);
break;
case GST_H264_SEI_FRAME_PACKING:
res = gst_h264_parser_parse_frame_packing (nalparser,
&sei->payload.frame_packing, nr, payload_size);
break;
case GST_H264_SEI_MASTERING_DISPLAY_COLOUR_VOLUME:
res = gst_h264_parser_parse_mastering_display_colour_volume (nalparser,
&sei->payload.mastering_display_colour_volume, nr);
break;
case GST_H264_SEI_CONTENT_LIGHT_LEVEL:
res = gst_h264_parser_parse_content_light_level_info (nalparser,
&sei->payload.content_light_level, nr);
break;
default:
res = gst_h264_parser_parse_sei_unhandled_payload (nalparser,
&sei->payload.unhandled_payload, nr, sei->payloadType,
payload_size >> 3);
sei->payloadType = GST_H264_SEI_UNHANDLED_PAYLOAD;
break;
}
/* When SEI message doesn't end at byte boundary,
* check remaining bits fit the specification.
*/
if (!nal_reader_is_byte_aligned (nr)) {
guint8 bit_equal_to_one;
READ_UINT8 (nr, bit_equal_to_one, 1);
if (!bit_equal_to_one)
GST_WARNING ("Bit non equal to one.");
while (!nal_reader_is_byte_aligned (nr)) {
guint8 bit_equal_to_zero;
READ_UINT8 (nr, bit_equal_to_zero, 1);
if (bit_equal_to_zero)
GST_WARNING ("Bit non equal to zero.");
}
}
/* Always make sure all the advertised SEI bits
* were consumed during parsing */
if (next > nal_reader_get_pos (nr)) {
GST_LOG ("Skipping %u unused SEI bits", next - nal_reader_get_pos (nr));
if (!nal_reader_skip_long (nr, next - nal_reader_get_pos (nr)))
goto error;
}
return res;
error:
GST_WARNING ("error parsing \"Sei message\"");
return GST_H264_PARSER_ERROR;
}
/******** API *************/
/**
* gst_h264_nal_parser_new:
*
* Creates a new #GstH264NalParser. It should be freed with
* gst_h264_nal_parser_free after use.
*
* Returns: a new #GstH264NalParser
*/
GstH264NalParser *
gst_h264_nal_parser_new (void)
{
GstH264NalParser *nalparser;
nalparser = g_slice_new0 (GstH264NalParser);
return nalparser;
}
/**
* gst_h264_nal_parser_free:
* @nalparser: the #GstH264NalParser to free
*
* Frees @nalparser and sets it to %NULL
*/
void
gst_h264_nal_parser_free (GstH264NalParser * nalparser)
{
guint i;
for (i = 0; i < GST_H264_MAX_SPS_COUNT; i++)
gst_h264_sps_clear (&nalparser->sps[i]);
for (i = 0; i < GST_H264_MAX_PPS_COUNT; i++)
gst_h264_pps_clear (&nalparser->pps[i]);
g_slice_free (GstH264NalParser, nalparser);
nalparser = NULL;
}
/**
* gst_h264_parser_identify_nalu_unchecked:
* @nalparser: a #GstH264NalParser
* @data: The data to parse
* @offset: the offset from which to parse @data
* @size: the size of @data
* @nalu: The #GstH264NalUnit where to store parsed nal headers
*
* Parses @data and fills @nalu from the next nalu data from @data.
*
* This differs from @gst_h264_parser_identify_nalu in that it doesn't
* check whether the packet is complete or not.
*
* Note: Only use this function if you already know the provided @data
* is a complete NALU, else use @gst_h264_parser_identify_nalu.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_identify_nalu_unchecked (GstH264NalParser * nalparser,
const guint8 * data, guint offset, gsize size, GstH264NalUnit * nalu)
{
gint off1;
memset (nalu, 0, sizeof (*nalu));
if (size < offset + 4) {
GST_DEBUG ("Can't parse, buffer has too small size %" G_GSIZE_FORMAT
", offset %u", size, offset);
return GST_H264_PARSER_ERROR;
}
off1 = scan_for_start_codes (data + offset, size - offset);
if (off1 < 0) {
GST_DEBUG ("No start code prefix in this buffer");
return GST_H264_PARSER_NO_NAL;
}
nalu->sc_offset = offset + off1;
/* sc might have 2 or 3 0-bytes */
if (nalu->sc_offset > 0 && data[nalu->sc_offset - 1] == 00)
nalu->sc_offset--;
nalu->offset = offset + off1 + 3;
nalu->data = (guint8 *) data;
nalu->size = size - nalu->offset;
if (!gst_h264_parse_nalu_header (nalu)) {
GST_WARNING ("error parsing \"NAL unit header\"");
nalu->size = 0;
return GST_H264_PARSER_BROKEN_DATA;
}
nalu->valid = TRUE;
if (nalu->type == GST_H264_NAL_SEQ_END ||
nalu->type == GST_H264_NAL_STREAM_END) {
GST_DEBUG ("end-of-seq or end-of-stream nal found");
nalu->size = 1;
return GST_H264_PARSER_OK;
}
return GST_H264_PARSER_OK;
}
/**
* gst_h264_parser_identify_nalu:
* @nalparser: a #GstH264NalParser
* @data: The data to parse, containing an Annex B coded NAL unit
* @offset: the offset in @data from which to parse the NAL unit
* @size: the size of @data
* @nalu: The #GstH264NalUnit to store the identified NAL unit in
*
* Parses the headers of an Annex B coded NAL unit from @data and puts the
* result into @nalu.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_identify_nalu (GstH264NalParser * nalparser,
const guint8 * data, guint offset, gsize size, GstH264NalUnit * nalu)
{
GstH264ParserResult res;
gint off2;
res =
gst_h264_parser_identify_nalu_unchecked (nalparser, data, offset, size,
nalu);
if (res != GST_H264_PARSER_OK)
goto beach;
/* The two NALs are exactly 1 byte size and are placed at the end of an AU,
* there is no need to wait for the following */
if (nalu->type == GST_H264_NAL_SEQ_END ||
nalu->type == GST_H264_NAL_STREAM_END)
goto beach;
off2 = scan_for_start_codes (data + nalu->offset, size - nalu->offset);
if (off2 < 0) {
GST_DEBUG ("Nal start %d, No end found", nalu->offset);
return GST_H264_PARSER_NO_NAL_END;
}
/* Mini performance improvement:
* We could have a way to store how many 0s were skipped to avoid
* parsing them again on the next NAL */
while (off2 > 0 && data[nalu->offset + off2 - 1] == 00)
off2--;
nalu->size = off2;
if (nalu->size < 2)
return GST_H264_PARSER_BROKEN_DATA;
GST_DEBUG ("Complete nal found. Off: %d, Size: %d", nalu->offset, nalu->size);
beach:
return res;
}
/**
* gst_h264_parser_identify_nalu_avc:
* @nalparser: a #GstH264NalParser
* @data: The data to parse, containing an AVC coded NAL unit
* @offset: the offset in @data from which to parse the NAL unit
* @size: the size of @data
* @nal_length_size: the size in bytes of the AVC nal length prefix.
* @nalu: The #GstH264NalUnit to store the identified NAL unit in
*
* Parses the headers of an AVC coded NAL unit from @data and puts the result
* into @nalu.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_identify_nalu_avc (GstH264NalParser * nalparser,
const guint8 * data, guint offset, gsize size, guint8 nal_length_size,
GstH264NalUnit * nalu)
{
GstBitReader br;
memset (nalu, 0, sizeof (*nalu));
/* Would overflow guint below otherwise: the callers needs to ensure that
* this never happens */
if (offset > G_MAXUINT32 - nal_length_size) {
GST_WARNING ("offset + nal_length_size overflow");
nalu->size = 0;
return GST_H264_PARSER_BROKEN_DATA;
}
if (size < offset + nal_length_size) {
GST_DEBUG ("Can't parse, buffer has too small size %" G_GSIZE_FORMAT
", offset %u", size, offset);
return GST_H264_PARSER_ERROR;
}
size = size - offset;
gst_bit_reader_init (&br, data + offset, size);
nalu->size = gst_bit_reader_get_bits_uint32_unchecked (&br,
nal_length_size * 8);
nalu->sc_offset = offset;
nalu->offset = offset + nal_length_size;
if (nalu->size > G_MAXUINT32 - nal_length_size) {
GST_WARNING ("NALU size + nal_length_size overflow");
nalu->size = 0;
return GST_H264_PARSER_BROKEN_DATA;
}
if (size < (gsize) nalu->size + nal_length_size) {
nalu->size = 0;
return GST_H264_PARSER_NO_NAL_END;
}
nalu->data = (guint8 *) data;
if (!gst_h264_parse_nalu_header (nalu)) {
GST_WARNING ("error parsing \"NAL unit header\"");
nalu->size = 0;
return GST_H264_PARSER_BROKEN_DATA;
}
nalu->valid = TRUE;
return GST_H264_PARSER_OK;
}
/**
* gst_h264_parser_parse_nal:
* @nalparser: a #GstH264NalParser
* @nalu: The #GstH264NalUnit to parse
*
* This function should be called in the case one doesn't need to
* parse a specific structure. It is necessary to do so to make
* sure @nalparser is up to date.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_parse_nal (GstH264NalParser * nalparser, GstH264NalUnit * nalu)
{
GstH264SPS sps;
GstH264PPS pps;
switch (nalu->type) {
case GST_H264_NAL_SPS:
return gst_h264_parser_parse_sps (nalparser, nalu, &sps);
break;
case GST_H264_NAL_PPS:
return gst_h264_parser_parse_pps (nalparser, nalu, &pps);
}
return GST_H264_PARSER_OK;
}
/**
* gst_h264_parser_parse_sps:
* @nalparser: a #GstH264NalParser
* @nalu: The #GST_H264_NAL_SPS #GstH264NalUnit to parse
* @sps: The #GstH264SPS to fill.
*
* Parses @nalu containing a Sequence Parameter Set, and fills @sps.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_parse_sps (GstH264NalParser * nalparser, GstH264NalUnit * nalu,
GstH264SPS * sps)
{
GstH264ParserResult res = gst_h264_parse_sps (nalu, sps);
if (res == GST_H264_PARSER_OK) {
GST_DEBUG ("adding sequence parameter set with id: %d to array", sps->id);
if (!gst_h264_sps_copy (&nalparser->sps[sps->id], sps))
return GST_H264_PARSER_ERROR;
nalparser->last_sps = &nalparser->sps[sps->id];
}
return res;
}
/* Parse seq_parameter_set_data() */
static gboolean
gst_h264_parse_sps_data (NalReader * nr, GstH264SPS * sps)
{
gint width, height;
guint subwc[] = { 1, 2, 2, 1 };
guint subhc[] = { 1, 2, 1, 1 };
memset (sps, 0, sizeof (*sps));
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
sps->extension_type = GST_H264_NAL_EXTENSION_NONE;
sps->chroma_format_idc = 1;
memset (sps->scaling_lists_4x4, 16, 96);
memset (sps->scaling_lists_8x8, 16, 384);
READ_UINT8 (nr, sps->profile_idc, 8);
READ_UINT8 (nr, sps->constraint_set0_flag, 1);
READ_UINT8 (nr, sps->constraint_set1_flag, 1);
READ_UINT8 (nr, sps->constraint_set2_flag, 1);
READ_UINT8 (nr, sps->constraint_set3_flag, 1);
READ_UINT8 (nr, sps->constraint_set4_flag, 1);
READ_UINT8 (nr, sps->constraint_set5_flag, 1);
/* skip reserved_zero_2bits */
if (!nal_reader_skip (nr, 2))
goto error;
READ_UINT8 (nr, sps->level_idc, 8);
READ_UE_MAX (nr, 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) {
READ_UE_MAX (nr, sps->chroma_format_idc, 3);
if (sps->chroma_format_idc == 3)
READ_UINT8 (nr, sps->separate_colour_plane_flag, 1);
READ_UE_MAX (nr, sps->bit_depth_luma_minus8, 6);
READ_UE_MAX (nr, sps->bit_depth_chroma_minus8, 6);
READ_UINT8 (nr, sps->qpprime_y_zero_transform_bypass_flag, 1);
READ_UINT8 (nr, 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 (!gst_h264_parser_parse_scaling_list (nr,
sps->scaling_lists_4x4, sps->scaling_lists_8x8,
default_4x4_inter, default_4x4_intra,
default_8x8_inter, default_8x8_intra, n_lists))
goto error;
}
}
READ_UE_MAX (nr, sps->log2_max_frame_num_minus4, 12);
sps->max_frame_num = 1 << (sps->log2_max_frame_num_minus4 + 4);
READ_UE_MAX (nr, sps->pic_order_cnt_type, 2);
if (sps->pic_order_cnt_type == 0) {
READ_UE_MAX (nr, sps->log2_max_pic_order_cnt_lsb_minus4, 12);
} else if (sps->pic_order_cnt_type == 1) {
guint i;
READ_UINT8 (nr, sps->delta_pic_order_always_zero_flag, 1);
READ_SE (nr, sps->offset_for_non_ref_pic);
READ_SE (nr, sps->offset_for_top_to_bottom_field);
READ_UE_MAX (nr, sps->num_ref_frames_in_pic_order_cnt_cycle, 255);
for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
READ_SE (nr, sps->offset_for_ref_frame[i]);
}
READ_UE (nr, sps->num_ref_frames);
READ_UINT8 (nr, sps->gaps_in_frame_num_value_allowed_flag, 1);
READ_UE (nr, sps->pic_width_in_mbs_minus1);
READ_UE (nr, sps->pic_height_in_map_units_minus1);
READ_UINT8 (nr, sps->frame_mbs_only_flag, 1);
if (!sps->frame_mbs_only_flag)
READ_UINT8 (nr, sps->mb_adaptive_frame_field_flag, 1);
READ_UINT8 (nr, sps->direct_8x8_inference_flag, 1);
READ_UINT8 (nr, sps->frame_cropping_flag, 1);
if (sps->frame_cropping_flag) {
READ_UE (nr, sps->frame_crop_left_offset);
READ_UE (nr, sps->frame_crop_right_offset);
READ_UE (nr, sps->frame_crop_top_offset);
READ_UE (nr, sps->frame_crop_bottom_offset);
}
READ_UINT8 (nr, sps->vui_parameters_present_flag, 1);
if (sps->vui_parameters_present_flag)
if (!gst_h264_parse_vui_parameters (sps, nr))
goto error;
/* calculate ChromaArrayType */
if (!sps->separate_colour_plane_flag)
sps->chroma_array_type = sps->chroma_format_idc;
/* Calculate width and height */
width = (sps->pic_width_in_mbs_minus1 + 1);
width *= 16;
height = (sps->pic_height_in_map_units_minus1 + 1);
height *= 16 * (2 - sps->frame_mbs_only_flag);
GST_LOG ("initial width=%d, height=%d", width, height);
if (width < 0 || height < 0) {
GST_WARNING ("invalid width/height in SPS");
goto error;
}
sps->width = width;
sps->height = height;
if (sps->frame_cropping_flag) {
const guint crop_unit_x = subwc[sps->chroma_format_idc];
const guint crop_unit_y =
subhc[sps->chroma_format_idc] * (2 - sps->frame_mbs_only_flag);
width -= (sps->frame_crop_left_offset + sps->frame_crop_right_offset)
* crop_unit_x;
height -= (sps->frame_crop_top_offset + sps->frame_crop_bottom_offset)
* crop_unit_y;
sps->crop_rect_width = width;
sps->crop_rect_height = height;
sps->crop_rect_x = sps->frame_crop_left_offset * crop_unit_x;
sps->crop_rect_y = sps->frame_crop_top_offset * crop_unit_y;
GST_LOG ("crop_rectangle x=%u y=%u width=%u, height=%u", sps->crop_rect_x,
sps->crop_rect_y, width, height);
}
sps->fps_num_removed = 0;
sps->fps_den_removed = 1;
return TRUE;
error:
return FALSE;
}
/* Parse subset_seq_parameter_set() data for MVC */
static gboolean
gst_h264_parse_sps_mvc_data (NalReader * nr, GstH264SPS * sps)
{
GstH264SPSExtMVC *const mvc = &sps->extension.mvc;
guint8 bit_equal_to_one;
guint i, j, k;
READ_UINT8 (nr, bit_equal_to_one, 1);
if (!bit_equal_to_one)
return FALSE;
sps->extension_type = GST_H264_NAL_EXTENSION_MVC;
READ_UE_MAX (nr, mvc->num_views_minus1, GST_H264_MAX_VIEW_COUNT - 1);
mvc->view = g_new0 (GstH264SPSExtMVCView, mvc->num_views_minus1 + 1);
if (!mvc->view)
goto error_allocation_failed;
for (i = 0; i <= mvc->num_views_minus1; i++)
READ_UE_MAX (nr, mvc->view[i].view_id, GST_H264_MAX_VIEW_ID);
for (i = 1; i <= mvc->num_views_minus1; i++) {
/* for RefPicList0 */
READ_UE_MAX (nr, mvc->view[i].num_anchor_refs_l0, 15);
for (j = 0; j < mvc->view[i].num_anchor_refs_l0; j++) {
READ_UE_MAX (nr, mvc->view[i].anchor_ref_l0[j], GST_H264_MAX_VIEW_ID);
}
/* for RefPicList1 */
READ_UE_MAX (nr, mvc->view[i].num_anchor_refs_l1, 15);
for (j = 0; j < mvc->view[i].num_anchor_refs_l1; j++) {
READ_UE_MAX (nr, mvc->view[i].anchor_ref_l1[j], GST_H264_MAX_VIEW_ID);
}
}
for (i = 1; i <= mvc->num_views_minus1; i++) {
/* for RefPicList0 */
READ_UE_MAX (nr, mvc->view[i].num_non_anchor_refs_l0, 15);
for (j = 0; j < mvc->view[i].num_non_anchor_refs_l0; j++) {
READ_UE_MAX (nr, mvc->view[i].non_anchor_ref_l0[j], GST_H264_MAX_VIEW_ID);
}
/* for RefPicList1 */
READ_UE_MAX (nr, mvc->view[i].num_non_anchor_refs_l1, 15);
for (j = 0; j < mvc->view[i].num_non_anchor_refs_l1; j++) {
READ_UE_MAX (nr, mvc->view[i].non_anchor_ref_l1[j], GST_H264_MAX_VIEW_ID);
}
}
READ_UE_MAX (nr, mvc->num_level_values_signalled_minus1, 63);
mvc->level_value =
g_new0 (GstH264SPSExtMVCLevelValue,
mvc->num_level_values_signalled_minus1 + 1);
if (!mvc->level_value)
goto error_allocation_failed;
for (i = 0; i <= mvc->num_level_values_signalled_minus1; i++) {
GstH264SPSExtMVCLevelValue *const level_value = &mvc->level_value[i];
READ_UINT8 (nr, level_value->level_idc, 8);
READ_UE_MAX (nr, level_value->num_applicable_ops_minus1, 1023);
level_value->applicable_op =
g_new0 (GstH264SPSExtMVCLevelValueOp,
level_value->num_applicable_ops_minus1 + 1);
if (!level_value->applicable_op)
goto error_allocation_failed;
for (j = 0; j <= level_value->num_applicable_ops_minus1; j++) {
GstH264SPSExtMVCLevelValueOp *const op = &level_value->applicable_op[j];
READ_UINT8 (nr, op->temporal_id, 3);
READ_UE_MAX (nr, op->num_target_views_minus1, 1023);
op->target_view_id = g_new (guint16, op->num_target_views_minus1 + 1);
if (!op->target_view_id)
goto error_allocation_failed;
for (k = 0; k <= op->num_target_views_minus1; k++)
READ_UE_MAX (nr, op->target_view_id[k], GST_H264_MAX_VIEW_ID);
READ_UE_MAX (nr, op->num_views_minus1, 1023);
}
}
return TRUE;
error_allocation_failed:
GST_WARNING ("failed to allocate memory");
gst_h264_sps_clear (sps);
return FALSE;
error:
gst_h264_sps_clear (sps);
return FALSE;
}
/**
* gst_h264_parse_sps:
* @nalu: The #GST_H264_NAL_SPS #GstH264NalUnit to parse
* @sps: The #GstH264SPS to fill.
*
* Parses @data, and fills the @sps structure.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parse_sps (GstH264NalUnit * nalu, GstH264SPS * sps)
{
NalReader nr;
GST_DEBUG ("parsing SPS");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
if (!gst_h264_parse_sps_data (&nr, sps))
goto error;
sps->valid = TRUE;
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Sequence parameter set\"");
sps->valid = FALSE;
return GST_H264_PARSER_ERROR;
}
/**
* gst_h264_parser_parse_subset_sps:
* @nalparser: a #GstH264NalParser
* @nalu: The #GST_H264_NAL_SUBSET_SPS #GstH264NalUnit to parse
* @sps: The #GstH264SPS to fill.
*
* Parses @data, and fills in the @sps structure.
*
* This function fully parses @data and allocates all the necessary
* data structures needed for MVC extensions. The resulting @sps
* structure shall be deallocated with gst_h264_sps_clear() when it is
* no longer needed.
*
* Note: if the caller doesn't need any of the MVC-specific data, then
* gst_h264_parser_parse_sps() is more efficient because those extra
* syntax elements are not parsed and no extra memory is allocated.
*
* Returns: a #GstH264ParserResult
*
* Since: 1.6
*/
GstH264ParserResult
gst_h264_parser_parse_subset_sps (GstH264NalParser * nalparser,
GstH264NalUnit * nalu, GstH264SPS * sps)
{
GstH264ParserResult res;
res = gst_h264_parse_subset_sps (nalu, sps);
if (res == GST_H264_PARSER_OK) {
GST_DEBUG ("adding sequence parameter set with id: %d to array", sps->id);
if (!gst_h264_sps_copy (&nalparser->sps[sps->id], sps)) {
gst_h264_sps_clear (sps);
return GST_H264_PARSER_ERROR;
}
nalparser->last_sps = &nalparser->sps[sps->id];
}
return res;
}
/**
* gst_h264_parse_subset_sps:
* @nalu: The #GST_H264_NAL_SUBSET_SPS #GstH264NalUnit to parse
* @sps: The #GstH264SPS to fill.
*
* Parses @data, and fills in the @sps structure.
*
* This function fully parses @data and allocates all the necessary
* data structures needed for MVC extensions. The resulting @sps
* structure shall be deallocated with gst_h264_sps_clear() when it is
* no longer needed.
*
* Note: if the caller doesn't need any of the MVC-specific data, then
* gst_h264_parser_parse_sps() is more efficient because those extra
* syntax elements are not parsed and no extra memory is allocated.
*
* Returns: a #GstH264ParserResult
*
* Since: 1.6
*/
GstH264ParserResult
gst_h264_parse_subset_sps (GstH264NalUnit * nalu, GstH264SPS * sps)
{
NalReader nr;
GST_DEBUG ("parsing Subset SPS");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
if (!gst_h264_parse_sps_data (&nr, sps))
goto error;
if (sps->profile_idc == GST_H264_PROFILE_MULTIVIEW_HIGH ||
sps->profile_idc == GST_H264_PROFILE_STEREO_HIGH) {
if (!gst_h264_parse_sps_mvc_data (&nr, sps))
goto error;
}
sps->valid = TRUE;
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Subset sequence parameter set\"");
gst_h264_sps_clear (sps);
sps->valid = FALSE;
return GST_H264_PARSER_ERROR;
}
/**
* gst_h264_parse_pps:
* @nalparser: a #GstH264NalParser
* @nalu: The #GST_H264_NAL_PPS #GstH264NalUnit to parse
* @pps: The #GstH264PPS to fill.
*
* Parses @data, and fills the @pps structure.
*
* The resulting @pps data structure shall be deallocated with the
* gst_h264_pps_clear() function when it is no longer needed, or prior
* to parsing a new PPS NAL unit.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parse_pps (GstH264NalParser * nalparser, GstH264NalUnit * nalu,
GstH264PPS * pps)
{
NalReader nr;
GstH264SPS *sps;
gint sps_id;
gint qp_bd_offset;
GST_DEBUG ("parsing PPS");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
memset (pps, 0, sizeof (*pps));
READ_UE_MAX (&nr, pps->id, GST_H264_MAX_PPS_COUNT - 1);
READ_UE_MAX (&nr, sps_id, GST_H264_MAX_SPS_COUNT - 1);
sps = gst_h264_parser_get_sps (nalparser, sps_id);
if (!sps) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
sps_id);
return GST_H264_PARSER_BROKEN_LINK;
}
pps->sequence = sps;
qp_bd_offset = 6 * (sps->bit_depth_luma_minus8 +
sps->separate_colour_plane_flag);
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
memcpy (&pps->scaling_lists_4x4, &sps->scaling_lists_4x4, 96);
memcpy (&pps->scaling_lists_8x8, &sps->scaling_lists_8x8, 384);
READ_UINT8 (&nr, pps->entropy_coding_mode_flag, 1);
READ_UINT8 (&nr, pps->pic_order_present_flag, 1);
READ_UE_MAX (&nr, pps->num_slice_groups_minus1, 7);
if (pps->num_slice_groups_minus1 > 0) {
READ_UE_MAX (&nr, 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++)
READ_UE (&nr, 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++) {
READ_UE (&nr, pps->top_left[i]);
READ_UE (&nr, pps->bottom_right[i]);
}
} else if (pps->slice_group_map_type >= 3 && pps->slice_group_map_type <= 5) {
READ_UINT8 (&nr, pps->slice_group_change_direction_flag, 1);
READ_UE (&nr, pps->slice_group_change_rate_minus1);
} else if (pps->slice_group_map_type == 6) {
gint bits;
gint i;
READ_UE (&nr, pps->pic_size_in_map_units_minus1);
bits = g_bit_storage (pps->num_slice_groups_minus1);
pps->slice_group_id =
g_new (guint8, pps->pic_size_in_map_units_minus1 + 1);
for (i = 0; i <= pps->pic_size_in_map_units_minus1; i++)
READ_UINT8 (&nr, pps->slice_group_id[i], bits);
}
}
READ_UE_MAX (&nr, pps->num_ref_idx_l0_active_minus1, 31);
READ_UE_MAX (&nr, pps->num_ref_idx_l1_active_minus1, 31);
READ_UINT8 (&nr, pps->weighted_pred_flag, 1);
READ_UINT8 (&nr, pps->weighted_bipred_idc, 2);
READ_SE_ALLOWED (&nr, pps->pic_init_qp_minus26, -(26 + qp_bd_offset), 25);
READ_SE_ALLOWED (&nr, pps->pic_init_qs_minus26, -26, 25);
READ_SE_ALLOWED (&nr, pps->chroma_qp_index_offset, -12, 12);
pps->second_chroma_qp_index_offset = pps->chroma_qp_index_offset;
READ_UINT8 (&nr, pps->deblocking_filter_control_present_flag, 1);
READ_UINT8 (&nr, pps->constrained_intra_pred_flag, 1);
READ_UINT8 (&nr, pps->redundant_pic_cnt_present_flag, 1);
if (!nal_reader_has_more_data (&nr))
goto done;
READ_UINT8 (&nr, pps->transform_8x8_mode_flag, 1);
READ_UINT8 (&nr, pps->pic_scaling_matrix_present_flag, 1);
if (pps->pic_scaling_matrix_present_flag) {
guint8 n_lists;
n_lists = 6 + ((sps->chroma_format_idc != 3) ? 2 : 6) *
pps->transform_8x8_mode_flag;
if (sps->scaling_matrix_present_flag) {
if (!gst_h264_parser_parse_scaling_list (&nr,
pps->scaling_lists_4x4, pps->scaling_lists_8x8,
sps->scaling_lists_4x4[3], sps->scaling_lists_4x4[0],
sps->scaling_lists_8x8[3], sps->scaling_lists_8x8[0], n_lists))
goto error;
} else {
if (!gst_h264_parser_parse_scaling_list (&nr,
pps->scaling_lists_4x4, pps->scaling_lists_8x8,
default_4x4_inter, default_4x4_intra,
default_8x8_inter, default_8x8_intra, n_lists))
goto error;
}
}
READ_SE_ALLOWED (&nr, pps->second_chroma_qp_index_offset, -12, 12);
done:
pps->valid = TRUE;
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Picture parameter set\"");
pps->valid = FALSE;
gst_h264_pps_clear (pps);
return GST_H264_PARSER_ERROR;
}
/**
* gst_h264_parser_parse_pps:
* @nalparser: a #GstH264NalParser
* @nalu: The #GST_H264_NAL_PPS #GstH264NalUnit to parse
* @pps: The #GstH264PPS to fill.
*
* Parses @nalu containing a Picture Parameter Set, and fills @pps.
*
* The resulting @pps data structure must be deallocated by the caller using
* gst_h264_pps_clear().
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_parse_pps (GstH264NalParser * nalparser,
GstH264NalUnit * nalu, GstH264PPS * pps)
{
GstH264ParserResult res = gst_h264_parse_pps (nalparser, nalu, pps);
if (res == GST_H264_PARSER_OK) {
GST_DEBUG ("adding picture parameter set with id: %d to array", pps->id);
if (!gst_h264_pps_copy (&nalparser->pps[pps->id], pps))
return GST_H264_PARSER_ERROR;
nalparser->last_pps = &nalparser->pps[pps->id];
}
return res;
}
/**
* gst_h264_pps_clear:
* @pps: The #GstH264PPS to free
*
* Clears all @pps internal resources.
*
* Since: 1.4
*/
void
gst_h264_pps_clear (GstH264PPS * pps)
{
g_return_if_fail (pps != NULL);
g_free (pps->slice_group_id);
pps->slice_group_id = NULL;
}
/**
* gst_h264_parser_parse_slice_hdr:
* @nalparser: a #GstH264NalParser
* @nalu: The #GST_H264_NAL_SLICE to #GST_H264_NAL_SLICE_IDR #GstH264NalUnit to parse
* @slice: The #GstH264SliceHdr to fill.
* @parse_pred_weight_table: Whether to parse the pred_weight_table or not
* @parse_dec_ref_pic_marking: Whether to parse the dec_ref_pic_marking or not
*
* Parses @nalu containing a coded slice, and fills @slice.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_parse_slice_hdr (GstH264NalParser * nalparser,
GstH264NalUnit * nalu, GstH264SliceHdr * slice,
gboolean parse_pred_weight_table, gboolean parse_dec_ref_pic_marking)
{
NalReader nr;
gint pps_id;
GstH264PPS *pps;
GstH264SPS *sps;
guint start_pos;
memset (slice, 0, sizeof (*slice));
if (!nalu->size) {
GST_DEBUG ("Invalid Nal Unit");
return GST_H264_PARSER_ERROR;
}
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
READ_UE (&nr, slice->first_mb_in_slice);
READ_UE (&nr, slice->type);
GST_DEBUG ("parsing \"Slice header\", slice type %u", slice->type);
READ_UE_MAX (&nr, pps_id, GST_H264_MAX_PPS_COUNT - 1);
pps = gst_h264_parser_get_pps (nalparser, pps_id);
if (!pps) {
GST_WARNING ("couldn't find associated picture parameter set with id: %d",
pps_id);
return GST_H264_PARSER_BROKEN_LINK;
}
slice->pps = pps;
sps = pps->sequence;
if (!sps) {
GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
pps->id);
return GST_H264_PARSER_BROKEN_LINK;
}
/* Check we can actually parse this slice (AVC, MVC headers only) */
if (sps->extension_type && sps->extension_type != GST_H264_NAL_EXTENSION_MVC) {
GST_WARNING ("failed to parse unsupported slice header");
return GST_H264_PARSER_BROKEN_DATA;
}
/* set default values for fields that might not be present in the bitstream
and have valid defaults */
if (GST_H264_IS_I_SLICE (slice)) {
slice->num_ref_idx_l0_active_minus1 = 0;
slice->num_ref_idx_l1_active_minus1 = 0;
} else {
slice->num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_active_minus1;
if (GST_H264_IS_B_SLICE (slice))
slice->num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_active_minus1;
else
slice->num_ref_idx_l1_active_minus1 = 0;
}
if (sps->separate_colour_plane_flag)
READ_UINT8 (&nr, slice->colour_plane_id, 2);
READ_UINT16 (&nr, slice->frame_num, sps->log2_max_frame_num_minus4 + 4);
if (!sps->frame_mbs_only_flag) {
READ_UINT8 (&nr, slice->field_pic_flag, 1);
if (slice->field_pic_flag)
READ_UINT8 (&nr, slice->bottom_field_flag, 1);
}
/* calculate MaxPicNum */
if (slice->field_pic_flag)
slice->max_pic_num = 2 * sps->max_frame_num;
else
slice->max_pic_num = sps->max_frame_num;
if (nalu->idr_pic_flag)
READ_UE_MAX (&nr, slice->idr_pic_id, G_MAXUINT16);
start_pos = nal_reader_get_pos (&nr);
if (sps->pic_order_cnt_type == 0) {
READ_UINT16 (&nr, slice->pic_order_cnt_lsb,
sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
if (pps->pic_order_present_flag && !slice->field_pic_flag)
READ_SE (&nr, slice->delta_pic_order_cnt_bottom);
}
if (sps->pic_order_cnt_type == 1 && !sps->delta_pic_order_always_zero_flag) {
READ_SE (&nr, slice->delta_pic_order_cnt[0]);
if (pps->pic_order_present_flag && !slice->field_pic_flag)
READ_SE (&nr, slice->delta_pic_order_cnt[1]);
}
slice->pic_order_cnt_bit_size = nal_reader_get_pos (&nr) - start_pos;
if (pps->redundant_pic_cnt_present_flag)
READ_UE_MAX (&nr, slice->redundant_pic_cnt, G_MAXINT8);
if (GST_H264_IS_B_SLICE (slice))
READ_UINT8 (&nr, 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)) {
READ_UINT8 (&nr, slice->num_ref_idx_active_override_flag, 1);
if (slice->num_ref_idx_active_override_flag) {
READ_UE_MAX (&nr, slice->num_ref_idx_l0_active_minus1, 31);
if (GST_H264_IS_B_SLICE (slice))
READ_UE_MAX (&nr, slice->num_ref_idx_l1_active_minus1, 31);
}
}
if (!slice_parse_ref_pic_list_modification (slice, &nr,
GST_H264_IS_MVC_NALU (nalu)))
goto error;
if ((pps->weighted_pred_flag && (GST_H264_IS_P_SLICE (slice)
|| GST_H264_IS_SP_SLICE (slice)))
|| (pps->weighted_bipred_idc == 1 && GST_H264_IS_B_SLICE (slice))) {
if (!gst_h264_slice_parse_pred_weight_table (slice, &nr,
sps->chroma_array_type))
goto error;
}
if (nalu->ref_idc != 0) {
if (!gst_h264_slice_parse_dec_ref_pic_marking (slice, nalu, &nr))
goto error;
}
if (pps->entropy_coding_mode_flag && !GST_H264_IS_I_SLICE (slice) &&
!GST_H264_IS_SI_SLICE (slice))
READ_UE_MAX (&nr, slice->cabac_init_idc, 2);
READ_SE_ALLOWED (&nr, 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))
READ_UINT8 (&nr, slice->sp_for_switch_flag, 1);
READ_SE_ALLOWED (&nr, slice->slice_qs_delta, -51, 51);
}
if (pps->deblocking_filter_control_present_flag) {
READ_UE_MAX (&nr, slice->disable_deblocking_filter_idc, 2);
if (slice->disable_deblocking_filter_idc != 1) {
READ_SE_ALLOWED (&nr, slice->slice_alpha_c0_offset_div2, -6, 6);
READ_SE_ALLOWED (&nr, slice->slice_beta_offset_div2, -6, 6);
}
}
if (pps->num_slice_groups_minus1 > 0 &&
pps->slice_group_map_type >= 3 && pps->slice_group_map_type <= 5) {
/* Ceil(Log2(PicSizeInMapUnits / SliceGroupChangeRate + 1)) [7-33] */
guint32 PicWidthInMbs = sps->pic_width_in_mbs_minus1 + 1;
guint32 PicHeightInMapUnits = sps->pic_height_in_map_units_minus1 + 1;
guint32 PicSizeInMapUnits = PicWidthInMbs * PicHeightInMapUnits;
guint32 SliceGroupChangeRate = pps->slice_group_change_rate_minus1 + 1;
const guint n = ceil_log2 (PicSizeInMapUnits / SliceGroupChangeRate + 1);
READ_UINT16 (&nr, slice->slice_group_change_cycle, n);
}
slice->header_size = nal_reader_get_pos (&nr);
slice->n_emulation_prevention_bytes = nal_reader_get_epb_count (&nr);
return GST_H264_PARSER_OK;
error:
GST_WARNING ("error parsing \"Slice header\"");
return GST_H264_PARSER_ERROR;
}
/* Free MVC-specific data from subset SPS header */
static void
gst_h264_sps_mvc_clear (GstH264SPS * sps)
{
GstH264SPSExtMVC *const mvc = &sps->extension.mvc;
guint i, j;
g_assert (sps->extension_type == GST_H264_NAL_EXTENSION_MVC);
g_free (mvc->view);
mvc->view = NULL;
for (i = 0; i <= mvc->num_level_values_signalled_minus1; i++) {
GstH264SPSExtMVCLevelValue *const level_value = &mvc->level_value[i];
for (j = 0; j <= level_value->num_applicable_ops_minus1; j++) {
g_free (level_value->applicable_op[j].target_view_id);
level_value->applicable_op[j].target_view_id = NULL;
}
g_free (level_value->applicable_op);
level_value->applicable_op = NULL;
}
g_free (mvc->level_value);
mvc->level_value = NULL;
/* All meaningful MVC info are now gone, just pretend to be a
* standard AVC struct now */
sps->extension_type = GST_H264_NAL_EXTENSION_NONE;
}
/**
* gst_h264_sps_clear:
* @sps: The #GstH264SPS to free
*
* Clears all @sps internal resources.
*
* Since: 1.6
*/
void
gst_h264_sps_clear (GstH264SPS * sps)
{
g_return_if_fail (sps != NULL);
switch (sps->extension_type) {
case GST_H264_NAL_EXTENSION_MVC:
gst_h264_sps_mvc_clear (sps);
break;
}
}
/**
* gst_h264_sei_clear:
* sei: The #GstH264SEIMessage to clear
*
* Frees allocated data in @sei if any.
*
* Since: 1.18
*/
void
gst_h264_sei_clear (GstH264SEIMessage * sei)
{
switch (sei->payloadType) {
case GST_H264_SEI_REGISTERED_USER_DATA:{
GstH264RegisteredUserData *rud = &sei->payload.registered_user_data;
g_free ((guint8 *) rud->data);
rud->data = NULL;
break;
}
case GST_H264_SEI_UNHANDLED_PAYLOAD:{
GstH264SEIUnhandledPayload *payload = &sei->payload.unhandled_payload;
g_free (payload->data);
payload->data = NULL;
payload->size = 0;
break;
}
default:
break;
}
}
/**
* gst_h264_parser_parse_sei:
* @nalparser: a #GstH264NalParser
* @nalu: The #GST_H264_NAL_SEI #GstH264NalUnit to parse
* @messages: The GArray of #GstH264SEIMessage to fill. The caller must free it when done.
*
* Parses @nalu containing one or more Supplementary Enhancement Information messages,
* and allocates and fills the @messages array.
*
* Returns: a #GstH264ParserResult
*/
GstH264ParserResult
gst_h264_parser_parse_sei (GstH264NalParser * nalparser, GstH264NalUnit * nalu,
GArray ** messages)
{
NalReader nr;
GstH264SEIMessage sei;
GstH264ParserResult res;
GST_DEBUG ("parsing SEI nal");
nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
nalu->size - nalu->header_bytes);
*messages = g_array_new (FALSE, FALSE, sizeof (GstH264SEIMessage));
g_array_set_clear_func (*messages, (GDestroyNotify) gst_h264_sei_clear);
do {
res = gst_h264_parser_parse_sei_message (nalparser, &nr, &sei);
if (res == GST_H264_PARSER_OK)
g_array_append_val (*messages, sei);
else
break;
} while (nal_reader_has_more_data (&nr));
return res;
}
/**
* gst_h264_parser_update_sps:
* @nalparser: a #GstH264NalParser
* @sps: (transfer none): a #GstH264SPS.
*
* Replace internal Sequence Parameter Set struct corresponding to id of @sps
* with @sps. @nalparser will mark @sps as last parsed sps.
*
* Returns: a #GstH264ParserResult
*
* Since: 1.18
*/
GstH264ParserResult
gst_h264_parser_update_sps (GstH264NalParser * nalparser, GstH264SPS * sps)
{
g_return_val_if_fail (nalparser != NULL, GST_H264_PARSER_ERROR);
g_return_val_if_fail (sps != NULL, GST_H264_PARSER_ERROR);
g_return_val_if_fail (sps->id >= 0 && sps->id < GST_H264_MAX_SPS_COUNT,
GST_H264_PARSER_ERROR);
if (!sps->valid) {
GST_WARNING ("Cannot update with invalid SPS");
return GST_H264_PARSER_ERROR;
}
GST_DEBUG ("Updating sequence parameter set with id: %d", sps->id);
if (!gst_h264_sps_copy (&nalparser->sps[sps->id], sps))
return GST_H264_PARSER_ERROR;
nalparser->last_sps = &nalparser->sps[sps->id];
return GST_H264_PARSER_OK;
}
/**
* gst_h264_parser_update_pps:
* @nalparser: a #GstH264NalParser
* @pps: (transfer none): a #GstH264PPS.
*
* Replace internal Picture Parameter Set struct corresponding to id of @pps
* with @pps. @nalparser will mark @pps as last parsed pps.
*
* Returns: a #GstH264ParserResult
*
* Since: 1.18
*/
GstH264ParserResult
gst_h264_parser_update_pps (GstH264NalParser * nalparser, GstH264PPS * pps)
{
GstH264SPS *sps;
g_return_val_if_fail (nalparser != NULL, GST_H264_PARSER_ERROR);
g_return_val_if_fail (pps != NULL, GST_H264_PARSER_ERROR);
g_return_val_if_fail (pps->id >= 0 && pps->id < GST_H264_MAX_PPS_COUNT,
GST_H264_PARSER_ERROR);
if (!pps->valid) {
GST_WARNING ("Cannot update with invalid PPS");
return GST_H264_PARSER_ERROR;
}
if (!pps->sequence) {
GST_WARNING ("No linked SPS struct");
return GST_H264_PARSER_BROKEN_LINK;
}
sps = gst_h264_parser_get_sps (nalparser, pps->sequence->id);
if (!sps || sps != pps->sequence) {
GST_WARNING ("Linked SPS is not identical to internal SPS");
return GST_H264_PARSER_BROKEN_LINK;
}
GST_DEBUG ("Updating picture parameter set with id: %d", pps->id);
if (!gst_h264_pps_copy (&nalparser->pps[pps->id], pps))
return GST_H264_PARSER_ERROR;
nalparser->last_pps = &nalparser->pps[pps->id];
return GST_H264_PARSER_OK;
}
/**
* gst_h264_quant_matrix_8x8_get_zigzag_from_raster:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from raster scan order to
* zigzag scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.4
*/
void
gst_h264_quant_matrix_8x8_get_zigzag_from_raster (guint8 out_quant[64],
const guint8 quant[64])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 64; i++)
out_quant[i] = quant[zigzag_8x8[i]];
}
/**
* gst_h264_quant_matrix_8x8_get_raster_from_zigzag:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from zigzag scan order to
* raster scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.4
*/
void
gst_h264_quant_matrix_8x8_get_raster_from_zigzag (guint8 out_quant[64],
const guint8 quant[64])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 64; i++)
out_quant[zigzag_8x8[i]] = quant[i];
}
/**
* gst_h264_quant_matrix_4x4_get_zigzag_from_raster:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from raster scan order to
* zigzag scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.4
*/
void
gst_h264_quant_matrix_4x4_get_zigzag_from_raster (guint8 out_quant[16],
const guint8 quant[16])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 16; i++)
out_quant[i] = quant[zigzag_4x4[i]];
}
/**
* gst_h264_quant_matrix_4x4_get_raster_from_zigzag:
* @out_quant: (out): The resulting quantization matrix
* @quant: The source quantization matrix
*
* Converts quantization matrix @quant from zigzag scan order to
* raster scan order and store the resulting factors into @out_quant.
*
* Note: it is an error to pass the same table in both @quant and
* @out_quant arguments.
*
* Since: 1.4
*/
void
gst_h264_quant_matrix_4x4_get_raster_from_zigzag (guint8 out_quant[16],
const guint8 quant[16])
{
guint i;
g_return_if_fail (out_quant != quant);
for (i = 0; i < 16; i++)
out_quant[zigzag_4x4[i]] = quant[i];
}
/**
* gst_h264_video_calculate_framerate:
* @sps: Current Sequence Parameter Set
* @field_pic_flag: Current @field_pic_flag, obtained from latest slice header
* @pic_struct: @pic_struct value if available, 0 otherwise
* @fps_num: (out): The resulting fps numerator
* @fps_den: (out): The resulting fps denominator
*
* Calculate framerate of a video sequence using @sps VUI information,
* @field_pic_flag from a slice header and @pic_struct from #GstH264PicTiming SEI
* message.
*
* If framerate is variable or can't be determined, @fps_num will be set to 0
* and @fps_den to 1.
*/
void
gst_h264_video_calculate_framerate (const GstH264SPS * sps,
guint field_pic_flag, guint pic_struct, gint * fps_num, gint * fps_den)
{
gint num = 0;
gint den = 1;
/* To calculate framerate, we use this formula:
* time_scale 1 1
* fps = ----------------- x --------------- x ------------------------
* num_units_in_tick DeltaTfiDivisor (field_pic_flag ? 2 : 1)
*
* See H264 specification E2.1 for more details.
*/
if (sps) {
if (sps->vui_parameters_present_flag) {
const GstH264VUIParams *vui = &sps->vui_parameters;
if (vui->timing_info_present_flag) {
int delta_tfi_divisor = 1;
num = vui->time_scale;
den = vui->num_units_in_tick;
if (vui->pic_struct_present_flag) {
switch (pic_struct) {
case 1:
case 2:
delta_tfi_divisor = 1;
break;
case 0:
case 3:
case 4:
delta_tfi_divisor = 2;
break;
case 5:
case 6:
delta_tfi_divisor = 3;
break;
case 7:
delta_tfi_divisor = 4;
break;
case 8:
delta_tfi_divisor = 6;
break;
}
} else {
delta_tfi_divisor = field_pic_flag ? 1 : 2;
}
den *= delta_tfi_divisor;
/* Picture is two fields ? */
den *= (field_pic_flag ? 2 : 1);
}
}
}
*fps_num = num;
*fps_den = den;
}
static gboolean
gst_h264_write_sei_registered_user_data (NalWriter * nw,
GstH264RegisteredUserData * rud)
{
WRITE_UINT8 (nw, rud->country_code, 8);
if (rud->country_code == 0xff)
WRITE_UINT8 (nw, rud->country_code_extension, 8);
WRITE_BYTES (nw, rud->data, rud->size);
return TRUE;
error:
return FALSE;
}
static gboolean
gst_h264_write_sei_frame_packing (NalWriter * nw,
GstH264FramePacking * frame_packing)
{
WRITE_UE (nw, frame_packing->frame_packing_id);
WRITE_UINT8 (nw, frame_packing->frame_packing_cancel_flag, 1);
if (!frame_packing->frame_packing_cancel_flag) {
WRITE_UINT8 (nw, frame_packing->frame_packing_type, 7);
WRITE_UINT8 (nw, frame_packing->quincunx_sampling_flag, 1);
WRITE_UINT8 (nw, frame_packing->content_interpretation_type, 6);
WRITE_UINT8 (nw, frame_packing->spatial_flipping_flag, 1);
WRITE_UINT8 (nw, frame_packing->frame0_flipped_flag, 1);
WRITE_UINT8 (nw, frame_packing->field_views_flag, 1);
WRITE_UINT8 (nw, frame_packing->current_frame_is_frame0_flag, 1);
WRITE_UINT8 (nw, frame_packing->frame0_self_contained_flag, 1);
WRITE_UINT8 (nw, 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_UINT8 (nw, frame_packing->frame0_grid_position_x, 4);
WRITE_UINT8 (nw, frame_packing->frame0_grid_position_y, 4);
WRITE_UINT8 (nw, frame_packing->frame1_grid_position_x, 4);
WRITE_UINT8 (nw, frame_packing->frame1_grid_position_y, 4);
}
/* frame_packing_arrangement_reserved_byte */
WRITE_UINT8 (nw, 0, 8);
WRITE_UE (nw, frame_packing->frame_packing_repetition_period);
}
/* frame_packing_arrangement_extension_flag */
WRITE_UINT8 (nw, 0, 1);
return TRUE;
error:
return FALSE;
}
static gboolean
gst_h264_write_sei_mastering_display_colour_volume (NalWriter * nw,
GstH264MasteringDisplayColourVolume * mdcv)
{
gint i;
for (i = 0; i < 3; i++) {
WRITE_UINT16 (nw, mdcv->display_primaries_x[i], 16);
WRITE_UINT16 (nw, mdcv->display_primaries_y[i], 16);
}
WRITE_UINT16 (nw, mdcv->white_point_x, 16);
WRITE_UINT16 (nw, mdcv->white_point_y, 16);
WRITE_UINT32 (nw, mdcv->max_display_mastering_luminance, 32);
WRITE_UINT32 (nw, mdcv->min_display_mastering_luminance, 32);
return TRUE;
error:
return FALSE;
}
static gboolean
gst_h264_write_sei_content_light_level_info (NalWriter * nw,
GstH264ContentLightLevel * cll)
{
WRITE_UINT16 (nw, cll->max_content_light_level, 16);
WRITE_UINT16 (nw, cll->max_pic_average_light_level, 16);
return TRUE;
error:
return FALSE;
}
static gboolean
gst_h264_write_sei_pic_timing (NalWriter * nw, GstH264PicTiming * tim)
{
if (tim->CpbDpbDelaysPresentFlag) {
WRITE_UINT32 (nw, tim->cpb_removal_delay,
tim->cpb_removal_delay_length_minus1 + 1);
WRITE_UINT32 (nw, 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_UINT8 (nw, 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_UINT8 (nw, tim->clock_timestamp_flag[i], 1);
if (tim->clock_timestamp_flag[i]) {
GstH264ClockTimestamp *timestamp = &tim->clock_timestamp[i];
WRITE_UINT8 (nw, timestamp->ct_type, 2);
WRITE_UINT8 (nw, timestamp->nuit_field_based_flag, 1);
WRITE_UINT8 (nw, timestamp->counting_type, 5);
WRITE_UINT8 (nw, timestamp->full_timestamp_flag, 1);
WRITE_UINT8 (nw, timestamp->discontinuity_flag, 1);
WRITE_UINT8 (nw, timestamp->cnt_dropped_flag, 1);
WRITE_UINT8 (nw, timestamp->n_frames, 8);
if (timestamp->full_timestamp_flag) {
WRITE_UINT8 (nw, timestamp->seconds_value, 6);
WRITE_UINT8 (nw, timestamp->minutes_value, 6);
WRITE_UINT8 (nw, timestamp->hours_value, 5);
} else {
WRITE_UINT8 (nw, timestamp->seconds_flag, 1);
if (timestamp->seconds_flag) {
WRITE_UINT8 (nw, timestamp->seconds_value, 6);
WRITE_UINT8 (nw, timestamp->minutes_flag, 1);
if (timestamp->minutes_flag) {
WRITE_UINT8 (nw, timestamp->minutes_value, 6);
WRITE_UINT8 (nw, timestamp->hours_flag, 1);
if (timestamp->hours_flag)
WRITE_UINT8 (nw, timestamp->hours_value, 5);
}
}
}
if (tim->time_offset_length > 0) {
WRITE_UINT32 (nw, timestamp->time_offset, tim->time_offset_length);
}
}
}
}
return TRUE;
error:
return FALSE;
}
static GstMemory *
gst_h264_create_sei_memory_internal (guint8 nal_prefix_size,
gboolean packetized, GArray * messages)
{
NalWriter nw;
gint i;
gboolean have_written_data = FALSE;
nal_writer_init (&nw, nal_prefix_size, packetized);
if (messages->len == 0)
goto error;
GST_DEBUG ("Create SEI nal from array, len: %d", messages->len);
/* nal header */
/* forbidden_zero_bit */
WRITE_UINT8 (&nw, 0, 1);
/* nal_ref_idc, zero for sei nalu */
WRITE_UINT8 (&nw, 0, 2);
/* nal_unit_type */
WRITE_UINT8 (&nw, GST_H264_NAL_SEI, 5);
for (i = 0; i < messages->len; i++) {
GstH264SEIMessage *msg = &g_array_index (messages, GstH264SEIMessage, i);
guint32 payload_size_data = 0;
guint32 payload_size_in_bits = 0;
guint32 payload_type_data = msg->payloadType;
gboolean need_align = FALSE;
switch (payload_type_data) {
case GST_H264_SEI_REGISTERED_USER_DATA:{
GstH264RegisteredUserData *rud = &msg->payload.registered_user_data;
/* itu_t_t35_country_code: 8 bits */
payload_size_data = 1;
if (rud->country_code == 0xff) {
/* itu_t_t35_country_code_extension_byte */
payload_size_data++;
}
payload_size_data += rud->size;
break;
}
case GST_H264_SEI_FRAME_PACKING:{
GstH264FramePacking *frame_packing = &msg->payload.frame_packing;
guint leading_zeros, rest;
/* frame_packing_arrangement_id: exp-golomb bits */
count_exp_golomb_bits (frame_packing->frame_packing_id,
&leading_zeros, &rest);
payload_size_in_bits = leading_zeros + rest;
/* frame_packing_arrangement_cancel_flag: 1 bit */
payload_size_in_bits++;
if (!frame_packing->frame_packing_cancel_flag) {
/* frame_packing_arrangement_type: 7 bits
* quincunx_sampling_flag: 1 bit
* content_interpretation_type: 6 bit
* spatial_flipping_flag: 1 bit
* frame0_flipped_flag: 1 bit
* field_views_flag: 1 bit
* current_frame_is_frame0_flag: 1 bit
* frame0_self_contained_flag: 1 bit
* frame1_self_contained_flag: 1 bit
*/
payload_size_in_bits += 20;
if (!frame_packing->quincunx_sampling_flag &&
frame_packing->frame_packing_type !=
GST_H264_FRAME_PACKING_TEMPORAL_INTERLEAVING) {
/* frame0_grid_position_x: 4bits
* frame0_grid_position_y: 4bits
* frame1_grid_position_x: 4bits
* frame1_grid_position_y: 4bits
*/
payload_size_in_bits += 16;
}
/* frame_packing_arrangement_reserved_byte: 8 bits */
payload_size_in_bits += 8;
/* frame_packing_arrangement_repetition_period: exp-golomb bits */
count_exp_golomb_bits (frame_packing->frame_packing_repetition_period,
&leading_zeros, &rest);
payload_size_in_bits += (leading_zeros + rest);
}
/* frame_packing_arrangement_extension_flag: 1 bit */
payload_size_in_bits++;
payload_size_data = payload_size_in_bits >> 3;
if ((payload_size_in_bits & 0x7) != 0) {
GST_INFO ("Bits for Frame Packing SEI is not byte aligned");
payload_size_data++;
need_align = TRUE;
}
break;
}
case GST_H264_SEI_MASTERING_DISPLAY_COLOUR_VOLUME:
/* x, y 16 bits per RGB channel
* x, y 16 bits white point
* max, min luminance 32 bits
*
* (2 * 2 * 3) + (2 * 2) + (4 * 2) = 24 bytes
*/
payload_size_data = 24;
break;
case GST_H264_SEI_CONTENT_LIGHT_LEVEL:
/* maxCLL and maxFALL per 16 bits
*
* 2 * 2 = 4 bytes
*/
payload_size_data = 4;
break;
case GST_H264_SEI_PIC_TIMING:{
GstH264PicTiming *tim = &msg->payload.pic_timing;
const guint8 num_clock_ts_table[9] = {
1, 1, 1, 2, 2, 3, 3, 2, 3
};
guint8 num_clock_num_ts;
guint i;
if (!tim->CpbDpbDelaysPresentFlag && !tim->pic_struct_present_flag) {
GST_WARNING
("Both CpbDpbDelaysPresentFlag and pic_struct_present_flag are zero");
break;
}
if (tim->CpbDpbDelaysPresentFlag) {
payload_size_in_bits = tim->cpb_removal_delay_length_minus1 + 1;
payload_size_in_bits += tim->dpb_output_delay_length_minus1 + 1;
}
if (tim->pic_struct_present_flag) {
/* pic_struct: 4bits */
payload_size_in_bits += 4;
num_clock_num_ts = num_clock_ts_table[tim->pic_struct];
for (i = 0; i < num_clock_num_ts; i++) {
/* clock_timestamp_flag: 1bit */
payload_size_in_bits++;
if (tim->clock_timestamp_flag[i]) {
GstH264ClockTimestamp *timestamp = &tim->clock_timestamp[i];
/* ct_type: 2bits
* nuit_field_based_flag: 1bit
* counting_type: 5bits
* full_timestamp_flag: 1bit
* discontinuity_flag: 1bit
* cnt_dropped_flag: 1bit
* n_frames: 8bits
*/
payload_size_in_bits += 19;
if (timestamp->full_timestamp_flag) {
/* seconds_value: 6bits
* minutes_value: 6bits
* hours_value: 5bits
*/
payload_size_in_bits += 17;
} else {
/* seconds_flag: 1bit */
payload_size_in_bits++;
if (timestamp->seconds_flag) {
/* seconds_value: 6bits
* minutes_flag: 1bit
*/
payload_size_in_bits += 7;
if (timestamp->minutes_flag) {
/* minutes_value: 6bits
* hours_flag: 1bits
*/
payload_size_in_bits += 7;
if (timestamp->hours_flag) {
/* hours_value: 5bits */
payload_size_in_bits += 5;
}
}
}
}
/* time_offset_length bits */
payload_size_in_bits += tim->time_offset_length;
}
}
}
payload_size_data = payload_size_in_bits >> 3;
if ((payload_size_in_bits & 0x7) != 0) {
GST_INFO ("Bits for Picture Timing SEI is not byte aligned");
payload_size_data++;
need_align = TRUE;
}
break;
}
default:
break;
}
if (payload_size_data == 0) {
GST_FIXME ("Unsupported SEI type %d", msg->payloadType);
continue;
}
/* write payload type bytes */
while (payload_type_data >= 0xff) {
WRITE_UINT8 (&nw, 0xff, 8);
payload_type_data -= -0xff;
}
WRITE_UINT8 (&nw, payload_type_data, 8);
/* write payload size bytes */
while (payload_size_data >= 0xff) {
WRITE_UINT8 (&nw, 0xff, 8);
payload_size_data -= -0xff;
}
WRITE_UINT8 (&nw, payload_size_data, 8);
switch (msg->payloadType) {
case GST_H264_SEI_REGISTERED_USER_DATA:
GST_DEBUG ("Writing \"Registered user data\"");
if (!gst_h264_write_sei_registered_user_data (&nw,
&msg->payload.registered_user_data)) {
GST_WARNING ("Failed to write \"Registered user data\"");
goto error;
}
have_written_data = TRUE;
break;
case GST_H264_SEI_FRAME_PACKING:
GST_DEBUG ("Writing \"Frame packing\"");
if (!gst_h264_write_sei_frame_packing (&nw,
&msg->payload.frame_packing)) {
GST_WARNING ("Failed to write \"Frame packing\"");
goto error;
}
have_written_data = TRUE;
break;
case GST_H264_SEI_MASTERING_DISPLAY_COLOUR_VOLUME:
GST_DEBUG ("Wrtiting \"Mastering display colour volume\"");
if (!gst_h264_write_sei_mastering_display_colour_volume (&nw,
&msg->payload.mastering_display_colour_volume)) {
GST_WARNING ("Failed to write \"Mastering display colour volume\"");
goto error;
}
have_written_data = TRUE;
break;
case GST_H264_SEI_CONTENT_LIGHT_LEVEL:
GST_DEBUG ("Writing \"Content light level\"");
if (!gst_h264_write_sei_content_light_level_info (&nw,
&msg->payload.content_light_level)) {
GST_WARNING ("Failed to write \"Content light level\"");
goto error;
}
have_written_data = TRUE;
break;
case GST_H264_SEI_PIC_TIMING:
GST_DEBUG ("Writing \"Picture timing\"");
if (!gst_h264_write_sei_pic_timing (&nw, &msg->payload.pic_timing)) {
GST_WARNING ("Failed to write \"Picture timing\"");
goto error;
}
have_written_data = TRUE;
break;
default:
break;
}
if (need_align && !nal_writer_do_rbsp_trailing_bits (&nw)) {
GST_WARNING ("Cannot insert traling bits");
goto error;
}
}
if (!have_written_data) {
GST_WARNING ("No written sei data");
goto error;
}
if (!nal_writer_do_rbsp_trailing_bits (&nw)) {
GST_WARNING ("Failed to insert rbsp trailing bits");
goto error;
}
return nal_writer_reset_and_get_memory (&nw);
error:
nal_writer_reset (&nw);
return NULL;
}
/**
* gst_h264_create_sei_memory:
* @start_code_prefix_length: a length of start code prefix, must be 3 or 4
* @messages: (transfer none): a GArray of #GstH264SEIMessage
*
* Creates raw byte-stream format (a.k.a Annex B type) SEI nal unit data
* from @messages
*
* Returns: a #GstMemory containing a SEI nal unit
*
* Since: 1.18
*/
GstMemory *
gst_h264_create_sei_memory (guint8 start_code_prefix_length, GArray * messages)
{
g_return_val_if_fail (start_code_prefix_length == 3
|| start_code_prefix_length == 4, NULL);
g_return_val_if_fail (messages != NULL, NULL);
g_return_val_if_fail (messages->len > 0, NULL);
return gst_h264_create_sei_memory_internal (start_code_prefix_length,
FALSE, messages);
}
/**
* gst_h264_create_sei_memory_avc:
* @nal_length_size: a size of nal length field, allowed range is [1, 4]
* @messages: (transfer none): a GArray of #GstH264SEIMessage
*
* Creates raw packetized format SEI nal unit data from @messages
*
* Returns: a #GstMemory containing a SEI nal unit
*
* Since: 1.18
*/
GstMemory *
gst_h264_create_sei_memory_avc (guint8 nal_length_size, GArray * messages)
{
g_return_val_if_fail (nal_length_size > 0 && nal_length_size < 5, NULL);
g_return_val_if_fail (messages != NULL, NULL);
g_return_val_if_fail (messages->len > 0, NULL);
return gst_h264_create_sei_memory_internal (nal_length_size, TRUE, messages);
}
static GstBuffer *
gst_h264_parser_insert_sei_internal (GstH264NalParser * nalparser,
guint8 nal_prefix_size, gboolean packetized, GstBuffer * au,
GstMemory * sei)
{
GstH264NalUnit nalu;
GstMapInfo info;
GstH264ParserResult pres;
guint offset = 0;
GstBuffer *new_buffer = NULL;
if (!gst_buffer_map (au, &info, GST_MAP_READ)) {
GST_ERROR ("Cannot map au buffer");
return NULL;
}
/* Find the offset of the first slice */
do {
if (packetized) {
pres = gst_h264_parser_identify_nalu_avc (nalparser,
info.data, offset, info.size, nal_prefix_size, &nalu);
} else {
pres = gst_h264_parser_identify_nalu (nalparser,
info.data, offset, info.size, &nalu);
}
if (pres != GST_H264_PARSER_OK && pres != GST_H264_PARSER_NO_NAL_END) {
GST_DEBUG ("Failed to identify nal unit, ret: %d", pres);
gst_buffer_unmap (au, &info);
return NULL;
}
if ((nalu.type >= GST_H264_NAL_SLICE && nalu.type <= GST_H264_NAL_SLICE_IDR)
|| (nalu.type >= GST_H264_NAL_SLICE_AUX
&& nalu.type <= GST_H264_NAL_SLICE_DEPTH)) {
GST_DEBUG ("Found slice nal type %d at offset %d",
nalu.type, nalu.sc_offset);
break;
}
offset = nalu.offset + nalu.size;
} while (pres == GST_H264_PARSER_OK);
gst_buffer_unmap (au, &info);
/* found the best position now, create new buffer */
new_buffer = gst_buffer_new ();
/* copy all metadata */
if (!gst_buffer_copy_into (new_buffer, au, GST_BUFFER_COPY_METADATA, 0, -1)) {
GST_ERROR ("Failed to copy metadata into new buffer");
gst_clear_buffer (&new_buffer);
goto out;
}
/* copy non-slice nal */
if (nalu.sc_offset > 0) {
if (!gst_buffer_copy_into (new_buffer, au,
GST_BUFFER_COPY_MEMORY, 0, nalu.sc_offset)) {
GST_ERROR ("Failed to copy buffer");
gst_clear_buffer (&new_buffer);
goto out;
}
}
/* insert sei */
gst_buffer_append_memory (new_buffer, gst_memory_ref (sei));
/* copy the rest */
if (!gst_buffer_copy_into (new_buffer, au,
GST_BUFFER_COPY_MEMORY, nalu.sc_offset, -1)) {
GST_ERROR ("Failed to copy buffer");
gst_clear_buffer (&new_buffer);
goto out;
}
out:
return new_buffer;
}
/**
* gst_h264_parser_insert_sei:
* @nalparser: a #GstH264NalParser
* @au: (transfer none): a #GstBuffer containing AU data
* @sei: (transfer none): a #GstMemory containing a SEI nal
*
* Copy @au into new #GstBuffer and insert @sei into the #GstBuffer.
* The validation for completeness of @au and @sei is caller's responsibility.
* Both @au and @sei must be byte-stream formatted
*
* Returns: (nullable): a SEI inserted #GstBuffer or %NULL
* if cannot figure out proper position to insert a @sei
*
* Since: 1.18
*/
GstBuffer *
gst_h264_parser_insert_sei (GstH264NalParser * nalparser, GstBuffer * au,
GstMemory * sei)
{
g_return_val_if_fail (nalparser != NULL, NULL);
g_return_val_if_fail (GST_IS_BUFFER (au), NULL);
g_return_val_if_fail (sei != NULL, NULL);
/* the size of start code prefix (3 or 4) is not matter since it will be
* scanned */
return gst_h264_parser_insert_sei_internal (nalparser, 4, FALSE, au, sei);
}
/**
* gst_h264_parser_insert_sei_avc:
* @nalparser: a #GstH264NalParser
* @nal_length_size: a size of nal length field, allowed range is [1, 4]
* @au: (transfer none): a #GstBuffer containing AU data
* @sei: (transfer none): a #GstMemory containing a SEI nal
*
* Copy @au into new #GstBuffer and insert @sei into the #GstBuffer.
* The validation for completeness of @au and @sei is caller's responsibility.
* Nal prefix type of both @au and @sei must be packetized, and
* also the size of nal length field must be identical to @nal_length_size
*
* Returns: (nullable): a SEI inserted #GstBuffer or %NULL
* if cannot figure out proper position to insert a @sei
*
* Since: 1.18
*/
GstBuffer *
gst_h264_parser_insert_sei_avc (GstH264NalParser * nalparser,
guint8 nal_length_size, GstBuffer * au, GstMemory * sei)
{
g_return_val_if_fail (nalparser != NULL, NULL);
g_return_val_if_fail (nal_length_size > 0 && nal_length_size < 5, NULL);
g_return_val_if_fail (GST_IS_BUFFER (au), NULL);
g_return_val_if_fail (sei != NULL, NULL);
/* the size of start code prefix (3 or 4) is not matter since it will be
* scanned */
return gst_h264_parser_insert_sei_internal (nalparser, nal_length_size, TRUE,
au, sei);
}
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