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* GStreamer
* Copyright (C) 2009 Carl-Anton Ingmarsson <>
* 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
* 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.
#ifndef __GST_MPEG4UTIL_H__
#define __GST_MPEG4UTIL_H__
#include <gst/gst.h>
#include <gst/base/gstbitreader.h>
#define CHECK_ALLOWED(val, min, max) { \
if (val < min || val > max) { \
GST_WARNING ("value not in allowed range. value: %d, range %d-%d", \
val, min, max); \
goto error; \
} \
#define READ_UINT8(reader, val, nbits) { \
if (!gst_bit_reader_get_bits_uint8 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
goto error; \
} \
#define READ_UINT16(reader, val, nbits) { \
if (!gst_bit_reader_get_bits_uint16 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
goto error; \
} \
#define READ_UINT32(reader, val, nbits) { \
if (!gst_bit_reader_get_bits_uint32 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto error; \
} \
#define READ_UINT64(reader, val, nbits) { \
if (!gst_bit_reader_get_bits_uint64 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint64, nbits: %d", nbits); \
goto error; \
} \
#define SKIP(reader, nbits) { \
if (!gst_bit_reader_skip (reader, nbits)) { \
GST_WARNING ("failed to skip nbits: %d", nbits); \
goto error; \
} \
typedef struct _Mpeg4VisualObjectSequence Mpeg4VisualObjectSequence;
typedef struct _Mpeg4VisualObject Mpeg4VisualObject;
typedef struct _Mpeg4VideoObjectLayer Mpeg4VideoObjectLayer;
typedef struct _Mpeg4GroupofVideoObjectPlane Mpeg4GroupofVideoObjectPlane;
typedef struct _Mpeg4VideoObjectPlane Mpeg4VideoObjectPlane;
#define MPEG4_PACKET_VOL_MIN 0x20
#define MPEG4_PACKET_VOL_MAX 0x2f
#define MPEG4_PACKET_VOS 0xb0
#define MPEG4_PACKET_EVOS 0xb1
#define MPEG4_PACKET_GOV 0xb3
#define MPEG4_PACKET_VO 0xb5
#define MPEG4_PACKET_VOP 0xb6
#define I_VOP 0x0
#define P_VOP 0x1
#define B_VOP 0x2
#define S_VOP 0x3
struct _Mpeg4VisualObjectSequence {
guint8 profile_and_level_indication;
struct _Mpeg4VisualObject {
guint8 verid;
guint8 priority;
guint8 type;
struct _Mpeg4VideoObjectLayer {
guint8 random_accesible_vol;
guint8 video_object_type_indication;
guint8 is_object_layer_identifier;
/* if is_object_layer_identifier */
guint8 verid;
guint8 priority;
guint8 par_n;
guint8 par_d;
guint8 chroma_format;
guint8 low_delay;
guint8 vbv_parameters;
/* if vbv_parameters */
guint32 bit_rate;
guint32 vbv_buffer_size;
guint8 shape;
guint16 vop_time_increment_resolution;
guint8 vop_time_increment_bits;
guint8 fixed_vop_rate;
/* if fixed_vop_rate */
guint16 fixed_vop_time_increment;
guint16 width;
guint16 height;
guint8 interlaced;
guint8 obmc_disable;
guint8 sprite_enable;
guint8 quant_precision;
guint8 bits_per_pixel;
guint8 quant_type;
guint8 intra_quant_mat[64];
guint8 non_intra_quant_mat[64];
guint8 quarter_sample;
guint8 complexity_estimation_disable;
guint8 resync_marker_disable;
struct _Mpeg4GroupofVideoObjectPlane {
guint8 hours;
guint8 minutes;
guint8 seconds;
guint8 closed;
guint8 broken_link;
struct _Mpeg4VideoObjectPlane {
guint8 coding_type;
guint8 modulo_time_base;
guint16 time_increment;
guint8 coded;
guint8 rounding_type;
guint8 intra_dc_vlc_thr;
guint8 top_field_first;
guint8 alternate_vertical_scan_flag;
guint16 quant;
guint8 fcode_forward;
guint8 fcode_backward;
gboolean mpeg4_util_parse_VOP (GstBuffer *buf, Mpeg4VideoObjectLayer *vol, Mpeg4VideoObjectPlane *vop);
gboolean mpeg4_util_parse_GOV (GstBuffer *buf, Mpeg4GroupofVideoObjectPlane *gov);
gboolean mpeg4_util_parse_VOL (GstBuffer *buf, Mpeg4VisualObject *vo, Mpeg4VideoObjectLayer *vol);
gboolean mpeg4_util_parse_VO (GstBuffer *buf, Mpeg4VisualObject *vo);
gboolean mpeg4_util_parse_VOS (GstBuffer *buf, Mpeg4VisualObjectSequence *vos);
#endif /* __GST_MPEG4UTIL_H__ */