mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-20 23:36:38 +00:00
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* 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;
|
|
guint8 alternate_scan;
|
|
};
|
|
|
|
struct MPEGPictureGOP
|
|
{
|
|
guint8 drop_frame_flag;
|
|
|
|
guint8 hour, minute, second, frame;
|
|
|
|
guint8 closed_gop;
|
|
guint8 broken_gop;
|
|
};
|
|
|
|
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
|