mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-09 10:59:39 +00:00
274387e8e9
Otherwise they get exposed/accessible in the resulting .so And make check-exports will complain
147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/* 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.
|
|
*/
|
|
|
|
/**
|
|
* Common code for NAL parsing from h264 and h265 parsers.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <gst/base/gstbytereader.h>
|
|
#include <gst/base/gstbitreader.h>
|
|
#include <string.h>
|
|
|
|
guint ceil_log2 (guint32 v);
|
|
|
|
typedef struct
|
|
{
|
|
const guint8 *data;
|
|
guint size;
|
|
|
|
guint n_epb; /* Number of emulation prevention bytes */
|
|
guint byte; /* Byte position */
|
|
guint bits_in_cache; /* bitpos in the cache of next bit */
|
|
guint8 first_byte;
|
|
guint64 cache; /* cached bytes */
|
|
} NalReader;
|
|
|
|
void nal_reader_init (NalReader * nr, const guint8 * data, guint size);
|
|
|
|
gboolean nal_reader_read (NalReader * nr, guint nbits);
|
|
gboolean nal_reader_skip (NalReader * nr, guint nbits);
|
|
gboolean nal_reader_skip_to_next_byte (NalReader * nr);
|
|
guint nal_reader_get_pos (const NalReader * nr);
|
|
guint nal_reader_get_remaining (const NalReader * nr);
|
|
guint nal_reader_get_epb_count (const NalReader * nr);
|
|
|
|
gboolean nal_reader_is_byte_aligned (NalReader * nr);
|
|
gboolean nal_reader_has_more_data (NalReader * nr);
|
|
|
|
#define NAL_READER_READ_BITS_H(bits) \
|
|
gboolean nal_reader_get_bits_uint##bits (NalReader *nr, guint##bits *val, guint nbits)
|
|
|
|
NAL_READER_READ_BITS_H (8);
|
|
NAL_READER_READ_BITS_H (16);
|
|
NAL_READER_READ_BITS_H (32);
|
|
|
|
#define NAL_READER_PEEK_BITS_H(bits) \
|
|
gboolean nal_reader_peek_bits_uint##bits (const NalReader *nr, guint##bits *val, guint nbits)
|
|
|
|
NAL_READER_PEEK_BITS_H (8);
|
|
|
|
gboolean nal_reader_get_ue (NalReader * nr, guint32 * val);
|
|
gboolean nal_reader_get_se (NalReader * nr, gint32 * val);
|
|
|
|
#define CHECK_ALLOWED(val, min, max) { \
|
|
if (val < min || val > max) { \
|
|
GST_WARNING ("value not in allowed range. value: %d, range %d-%d", \
|
|
val, min, max); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_UINT8(nr, val, nbits) { \
|
|
if (!nal_reader_get_bits_uint8 (nr, &val, nbits)) { \
|
|
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_UINT16(nr, val, nbits) { \
|
|
if (!nal_reader_get_bits_uint16 (nr, &val, nbits)) { \
|
|
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_UINT32(nr, val, nbits) { \
|
|
if (!nal_reader_get_bits_uint32 (nr, &val, nbits)) { \
|
|
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_UINT64(nr, val, nbits) { \
|
|
if (!nal_reader_get_bits_uint64 (nr, &val, nbits)) { \
|
|
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_UE(nr, val) { \
|
|
if (!nal_reader_get_ue (nr, &val)) { \
|
|
GST_WARNING ("failed to read UE"); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_UE_ALLOWED(nr, val, min, max) { \
|
|
guint32 tmp; \
|
|
READ_UE (nr, tmp); \
|
|
CHECK_ALLOWED (tmp, min, max); \
|
|
val = tmp; \
|
|
}
|
|
|
|
#define READ_SE(nr, val) { \
|
|
if (!nal_reader_get_se (nr, &val)) { \
|
|
GST_WARNING ("failed to read SE"); \
|
|
goto error; \
|
|
} \
|
|
}
|
|
|
|
#define READ_SE_ALLOWED(nr, val, min, max) { \
|
|
gint32 tmp; \
|
|
READ_SE (nr, tmp); \
|
|
CHECK_ALLOWED (tmp, min, max); \
|
|
val = tmp; \
|
|
}
|
|
|
|
gint scan_for_start_codes (const guint8 * data, guint size);
|