/* * GStreamer * Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 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__ */