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150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* GStreamer
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* Copyright (C) 2007 Jan Schmidt <thaytan@mad.scientist.com>
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* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __MPEGUTIL_H__
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#define __MPEGUTIL_H__
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#include <gst/gst.h>
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typedef struct MPEGSeqHdr MPEGSeqHdr;
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typedef struct MPEGSeqExtHdr MPEGSeqExtHdr;
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typedef struct MPEGPictureHdr MPEGPictureHdr;
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typedef struct MPEGPictureExt MPEGPictureExt;
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typedef struct MPEGGop MPEGGop;
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typedef struct MPEGQuantMatrix MPEGQuantMatrix;
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/* Packet ID codes for different packet types we
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* care about */
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#define MPEG_PACKET_PICTURE 0x00
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#define MPEG_PACKET_SLICE_MIN 0x01
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#define MPEG_PACKET_SLICE_MAX 0xaf
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#define MPEG_PACKET_SEQUENCE 0xb3
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#define MPEG_PACKET_EXTENSION 0xb5
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#define MPEG_PACKET_SEQUENCE_END 0xb7
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#define MPEG_PACKET_GOP 0xb8
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#define MPEG_PACKET_NONE 0xff
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/* Extension codes we care about */
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#define MPEG_PACKET_EXT_SEQUENCE 0x01
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#define MPEG_PACKET_EXT_SEQUENCE_DISPLAY 0x02
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#define MPEG_PACKET_EXT_QUANT_MATRIX 0x03
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#define MPEG_PACKET_EXT_PICTURE_CODING 0x08
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/* frame types */
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#define I_FRAME 1
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#define P_FRAME 2
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#define B_FRAME 3
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struct MPEGSeqHdr
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{
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/* Pixel-Aspect Ratio from DAR code via set_par_from_dar */
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guint par_w, par_h;
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/* Width and Height of the video */
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guint16 width, height;
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/* Framerate */
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guint fps_n, fps_d;
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guint32 bitrate;
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guint16 vbv_buffer;
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guint8 constrained_parameters_flag;
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guint8 intra_quantizer_matrix[64];
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guint8 non_intra_quantizer_matrix[64];
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};
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struct MPEGSeqExtHdr
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{
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/* mpeg2 decoder profile */
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guint8 profile;
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/* mpeg2 decoder level */
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guint8 level;
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guint8 progressive;
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guint8 chroma_format;
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guint8 horiz_size_ext, vert_size_ext;
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guint16 bitrate_ext;
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guint8 fps_n_ext, fps_d_ext;
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};
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struct MPEGPictureHdr
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{
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guint16 tsn;
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guint8 pic_type;
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guint16 vbv_delay;
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guint8 full_pel_forward_vector, full_pel_backward_vector;
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guint8 f_code[2][2];
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};
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struct MPEGPictureExt
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{
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guint8 f_code[2][2];
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guint8 intra_dc_precision;
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guint8 picture_structure;
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guint8 top_field_first;
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guint8 frame_pred_frame_dct;
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guint8 concealment_motion_vectors;
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guint8 q_scale_type;
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guint8 intra_vlc_format;
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guint8 alternate_scan;
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guint8 repeat_first_field;
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guint8 chroma_420_type;
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guint8 progressive_frame;
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};
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struct MPEGGop
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{
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guint8 drop_frame_flag;
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guint8 hour, minute, second, frame;
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guint8 closed_gop;
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guint8 broken_gop;
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};
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struct MPEGQuantMatrix
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{
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guint8 intra_quantizer_matrix[64];
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guint8 non_intra_quantizer_matrix[64];
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};
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gboolean mpeg_util_parse_sequence_hdr (MPEGSeqHdr *hdr, GstBuffer *buffer);
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gboolean mpeg_util_parse_sequence_extension (MPEGSeqExtHdr *hdr,
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GstBuffer *buffer);
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gboolean mpeg_util_parse_picture_hdr (MPEGPictureHdr * hdr, GstBuffer *buffer);
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gboolean mpeg_util_parse_picture_coding_extension (MPEGPictureExt *ext,
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GstBuffer *buffer);
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gboolean mpeg_util_parse_gop (MPEGGop * gop, GstBuffer *buffer);
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gboolean mpeg_util_parse_quant_matrix (MPEGQuantMatrix * qm, GstBuffer *buffer);
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#endif
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