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/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
* *
********************************************************************
function:
last mod: $Id: decint.h 16503 2009-08-22 18:14:02Z giles $
********************************************************************/
#include <limits.h>
#if !defined(_decint_H)
# define _decint_H (1)
# include "theora/theoradec.h"
# include "internal.h"
# include "bitpack.h"
typedef struct th_setup_info oc_setup_info;
typedef struct th_dec_ctx oc_dec_ctx;
# include "huffdec.h"
# include "dequant.h"
/*Constants for the packet-in state machine specific to the decoder.*/
/*Next packet to read: Data packet.*/
#define OC_PACKET_DATA (0)
struct th_setup_info{
/*The Huffman codes.*/
oc_huff_node *huff_tables[TH_NHUFFMAN_TABLES];
/*The quantization parameters.*/
th_quant_info qinfo;
};
struct th_dec_ctx{
/*Shared encoder/decoder state.*/
oc_theora_state state;
/*Whether or not packets are ready to be emitted.
This takes on negative values while there are remaining header packets to
be emitted, reaches 0 when the codec is ready for input, and goes to 1
when a frame has been processed and a data packet is ready.*/
int packet_state;
/*Buffer in which to assemble packets.*/
oc_pack_buf opb;
/*Huffman decode trees.*/
oc_huff_node *huff_tables[TH_NHUFFMAN_TABLES];
/*The index of the first token in each plane for each coefficient.*/
ptrdiff_t ti0[3][64];
/*The number of outstanding EOB runs at the start of each coefficient in each
plane.*/
ptrdiff_t eob_runs[3][64];
/*The DCT token lists.*/
unsigned char *dct_tokens;
/*The extra bits associated with DCT tokens.*/
unsigned char *extra_bits;
/*The number of dct tokens unpacked so far.*/
int dct_tokens_count;
/*The out-of-loop post-processing level.*/
int pp_level;
/*The DC scale used for out-of-loop deblocking.*/
int pp_dc_scale[64];
/*The sharpen modifier used for out-of-loop deringing.*/
int pp_sharp_mod[64];
/*The DC quantization index of each block.*/
unsigned char *dc_qis;
/*The variance of each block.*/
int *variances;
/*The storage for the post-processed frame buffer.*/
unsigned char *pp_frame_data;
/*Whether or not the post-processsed frame buffer has space for chroma.*/
int pp_frame_state;
/*The buffer used for the post-processed frame.
Note that this is _not_ guaranteed to have the same strides and offsets as
the reference frame buffers.*/
th_ycbcr_buffer pp_frame_buf;
/*The striped decode callback function.*/
th_stripe_callback stripe_cb;
# if defined(HAVE_CAIRO)
/*Output metrics for debugging.*/
int telemetry;
int telemetry_mbmode;
int telemetry_mv;
int telemetry_qi;
int telemetry_bits;
int telemetry_frame_bytes;
int telemetry_coding_bytes;
int telemetry_mode_bytes;
int telemetry_mv_bytes;
int telemetry_qi_bytes;
int telemetry_dc_bytes;
unsigned char *telemetry_frame_data;
# endif
};
#endif
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