mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-12 13:44:56 +02:00
c8c99b214e
* aout and vout are now allocated in banks, making it possible to have
several of them at the same time.
* configure now checks for MMX and MMX EXT support in the assembler.
* Removed all MMX code from the main program and moved it to the
existing idct modules (Closes: Debian bug #96036).
Don't forget to make distclean before building vlc again.
190 lines
8.5 KiB
C
190 lines
8.5 KiB
C
/*****************************************************************************
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* vpar_headers.h : video parser : headers parsing
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*****************************************************************************
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* Copyright (C) 1999, 2000 VideoLAN
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* $Id: vpar_headers.h,v 1.26 2001/05/06 04:32:02 sam Exp $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Stéphane Borel <stef@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Requires:
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* "config.h"
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* "common.h"
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* "mtime.h"
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* "threads.h"
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* "input.h"
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* "video.h"
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* "video_output.h"
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* "decoder_fifo.h"
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* "video_fifo.h"
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*****************************************************************************/
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/*****************************************************************************
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* quant_matrix_t : Quantization Matrix
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*****************************************************************************/
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typedef struct quant_matrix_s
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{
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u8 * pi_matrix;
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boolean_t b_allocated;
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/* Has the matrix been allocated by vpar_headers ? */
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} quant_matrix_t;
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/*****************************************************************************
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* sequence_t : sequence descriptor
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*****************************************************************************
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* This structure should only be changed when reading the sequence header,
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* or exceptionnally some extension structures (like quant_matrix).
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*****************************************************************************/
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typedef struct sequence_s
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{
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u32 i_height, i_width; /* height and width of the lum
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* comp of the picture */
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u32 i_size; /* total number of pel of the lum comp */
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u32 i_mb_height, i_mb_width, i_mb_size;
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/* the same, in macroblock units */
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unsigned int i_aspect_ratio; /* height/width display ratio */
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unsigned int i_matrix_coefficients;/* coeffs of the YUV transform */
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int i_frame_rate; /* theoritical frame rate in fps*1001 */
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boolean_t b_mpeg2; /* guess */
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boolean_t b_progressive; /* progressive (ie.
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* non-interlaced) frame */
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unsigned int i_scalable_mode; /* scalability ; unsupported, but
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* modifies the syntax of the binary
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* stream. */
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quant_matrix_t intra_quant, nonintra_quant;
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quant_matrix_t chroma_intra_quant, chroma_nonintra_quant;
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/* current quantization matrices */
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/* Chromatic information */
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unsigned int i_chroma_format; /* see CHROMA_* below */
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int i_chroma_nb_blocks; /* number of chroma blocks */
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u32 i_chroma_width;/* width of a line of the chroma comp */
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u32 i_chroma_mb_width, i_chroma_mb_height;
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/* size of a macroblock in the chroma buffer
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* (eg. 8x8 or 8x16 or 16x16) */
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/* Parser context */
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picture_t * p_forward; /* current forward reference frame */
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picture_t * p_backward; /* current backward reference frame */
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mtime_t next_pts, next_dts;
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int i_current_rate;
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boolean_t b_expect_discontinuity; /* reset the frame predictors
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* after the current frame */
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/* Copyright extension */
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boolean_t b_copyright_flag; /* Whether the following
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information is significant
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or not. */
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u8 i_copyright_id;
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boolean_t b_original;
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u64 i_copyright_nb;
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} sequence_t;
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/*****************************************************************************
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* picture_parsing_t : parser context descriptor
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*****************************************************************************
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* This structure should only be changed when reading the picture header.
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*****************************************************************************/
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typedef struct picture_parsing_s
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{
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/* ISO/CEI 11172-2 backward compatibility */
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boolean_t pb_full_pel_vector[2];
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int i_forward_f_code, i_backward_f_code;
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/* Values from the picture_coding_extension. Please refer to ISO/IEC
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* 13818-2. */
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int ppi_f_code[2][2];
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int i_intra_dc_precision;
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boolean_t b_frame_pred_frame_dct, b_q_scale_type;
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boolean_t b_intra_vlc_format;
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boolean_t b_alternate_scan, b_progressive;
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boolean_t b_top_field_first, b_concealment_mv;
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boolean_t b_repeat_first_field;
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/* Relative to the current field */
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int i_coding_type, i_structure;
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boolean_t b_frame_structure; /* i_structure == FRAME_STRUCTURE */
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picture_t * p_picture; /* picture buffer from vout */
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int i_current_structure; /* current parsed structure of
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* p_picture (second field ?) */
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#ifdef VDEC_SMP
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macroblock_t * pp_mb[MAX_MB]; /* macroblock buffer to
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* send to the vdec thread(s) */
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#endif
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boolean_t b_error; /* parsing error, try to recover */
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int i_l_stride, i_c_stride;
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/* number of coeffs to jump when changing
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* lines (different with field pictures) */
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} picture_parsing_t;
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/*****************************************************************************
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* Standard codes
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*****************************************************************************/
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#define PICTURE_START_CODE 0x100L
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#define SLICE_START_CODE_MIN 0x101L
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#define SLICE_START_CODE_MAX 0x1AFL
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#define USER_DATA_START_CODE 0x1B2L
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#define SEQUENCE_HEADER_CODE 0x1B3L
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#define SEQUENCE_ERROR_CODE 0x1B4L
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#define EXTENSION_START_CODE 0x1B5L
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#define SEQUENCE_END_CODE 0x1B7L
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#define GROUP_START_CODE 0x1B8L
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/* extension start code IDs */
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#define SEQUENCE_EXTENSION_ID 1
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#define SEQUENCE_DISPLAY_EXTENSION_ID 2
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#define QUANT_MATRIX_EXTENSION_ID 3
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#define COPYRIGHT_EXTENSION_ID 4
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#define SEQUENCE_SCALABLE_EXTENSION_ID 5
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#define PICTURE_DISPLAY_EXTENSION_ID 7
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#define PICTURE_CODING_EXTENSION_ID 8
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#define PICTURE_SPATIAL_SCALABLE_EXTENSION_ID 9
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#define PICTURE_TEMPORAL_SCALABLE_EXTENSION_ID 10
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/* scalable modes */
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#define SC_NONE 0
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#define SC_DP 1
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#define SC_SPAT 2
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#define SC_SNR 3
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#define SC_TEMP 4
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/* Chroma types */
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#define CHROMA_420 1
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#define CHROMA_422 2
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#define CHROMA_444 3
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/* Pictures types */
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#define I_CODING_TYPE 1
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#define P_CODING_TYPE 2
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#define B_CODING_TYPE 3
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#define D_CODING_TYPE 4 /* MPEG-1 ONLY */
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/* other values are reserved */
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/* Structures */
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#define TOP_FIELD 1
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#define BOTTOM_FIELD 2
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#define FRAME_STRUCTURE 3
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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int vpar_NextSequenceHeader( struct vpar_thread_s * p_vpar );
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int vpar_ParseHeader( struct vpar_thread_s * p_vpar );
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