gstreamer/sys/vdpau/mpegutil.h

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/* GStreamer
* Copyright (C) 2007 Jan Schmidt <thaytan@mad.scientist.com>
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __MPEGUTIL_H__
#define __MPEGUTIL_H__
#include <gst/gst.h>
typedef struct MPEGSeqHdr MPEGSeqHdr;
typedef struct MPEGPictureHdr MPEGPictureHdr;
typedef struct MPEGPictureExt MPEGPictureExt;
typedef struct MPEGPictureGOP MPEGPictureGOP;
typedef struct MPEGQuantMatrix MPEGQuantMatrix;
/* Packet ID codes for different packet types we
* care about */
#define MPEG_PACKET_PICTURE 0x00
#define MPEG_PACKET_SLICE_MIN 0x01
#define MPEG_PACKET_SLICE_MAX 0xaf
#define MPEG_PACKET_SEQUENCE 0xb3
#define MPEG_PACKET_EXTENSION 0xb5
#define MPEG_PACKET_SEQUENCE_END 0xb7
#define MPEG_PACKET_GOP 0xb8
#define MPEG_PACKET_NONE 0xff
/* Extension codes we care about */
#define MPEG_PACKET_EXT_SEQUENCE 0x01
#define MPEG_PACKET_EXT_SEQUENCE_DISPLAY 0x02
#define MPEG_PACKET_EXT_QUANT_MATRIX 0x03
#define MPEG_PACKET_EXT_PICTURE_CODING 0x08
/* frame types */
#define I_FRAME 1
#define P_FRAME 2
#define B_FRAME 3
struct MPEGSeqHdr
{
/* 0 for unknown, else 1 or 2 */
guint8 mpeg_version;
/* Pixel-Aspect Ratio from DAR code via set_par_from_dar */
gint par_w, par_h;
/* Width and Height of the video */
gint width, height;
/* Framerate */
gint fps_n, fps_d;
/* mpeg2 decoder profile */
gint profile;
guint8 intra_quantizer_matrix[64];
guint8 non_intra_quantizer_matrix[64];
};
struct MPEGPictureHdr
{
guint8 pic_type;
guint8 full_pel_forward_vector, full_pel_backward_vector;
guint8 f_code[2][2];
};
struct MPEGPictureExt
{
guint8 f_code[2][2];
guint8 intra_dc_precision;
guint8 picture_structure;
guint8 top_field_first;
guint8 frame_pred_frame_dct;
guint8 concealment_motion_vectors;
guint8 q_scale_type;
guint8 intra_vlc_format;
};
struct MPEGPictureGOP
{
guint8 drop_frame_flag;
guint8 frame;
GstClockTime timestamp;
};
struct MPEGQuantMatrix
{
guint8 intra_quantizer_matrix[64];
guint8 non_intra_quantizer_matrix[64];
};
gboolean mpeg_util_parse_sequence_hdr (MPEGSeqHdr *hdr,
guint8 *data, guint8 *end);
gboolean mpeg_util_parse_picture_hdr (MPEGPictureHdr * hdr, guint8 * data, guint8 * end);
gboolean mpeg_util_parse_picture_coding_extension (MPEGPictureExt *ext, guint8 *data, guint8 *end);
gboolean mpeg_util_parse_picture_gop (MPEGPictureGOP * gop, guint8 * data, guint8 * end);
gboolean mpeg_util_parse_quant_matrix (MPEGQuantMatrix * qm, guint8 * data, guint8 * end);
guint8 *mpeg_util_find_start_code (guint32 * sync_word, guint8 * cur, guint8 * end);
guint32 read_bits (guint8 * buf, gint start_bit, gint n_bits);
#endif