1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libtheora/lib/decint.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,186 @@
1.4 +/********************************************************************
1.5 + * *
1.6 + * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
1.7 + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
1.8 + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
1.9 + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
1.10 + * *
1.11 + * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
1.12 + * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
1.13 + * *
1.14 + ********************************************************************
1.15 +
1.16 + function:
1.17 + last mod: $Id: decint.h 17457 2010-09-24 02:05:49Z tterribe $
1.18 +
1.19 + ********************************************************************/
1.20 +
1.21 +#include <limits.h>
1.22 +#if !defined(_decint_H)
1.23 +# define _decint_H (1)
1.24 +# include "theora/theoradec.h"
1.25 +# include "state.h"
1.26 +# include "bitpack.h"
1.27 +# include "huffdec.h"
1.28 +# include "dequant.h"
1.29 +
1.30 +typedef struct th_setup_info oc_setup_info;
1.31 +typedef struct oc_dec_opt_vtable oc_dec_opt_vtable;
1.32 +typedef struct oc_dec_pipeline_state oc_dec_pipeline_state;
1.33 +typedef struct th_dec_ctx oc_dec_ctx;
1.34 +
1.35 +
1.36 +
1.37 +/*Decoder-specific accelerated functions.*/
1.38 +# if defined(OC_C64X_ASM)
1.39 +# include "c64x/c64xdec.h"
1.40 +# endif
1.41 +
1.42 +# if !defined(oc_dec_accel_init)
1.43 +# define oc_dec_accel_init oc_dec_accel_init_c
1.44 +# endif
1.45 +# if defined(OC_DEC_USE_VTABLE)
1.46 +# if !defined(oc_dec_dc_unpredict_mcu_plane)
1.47 +# define oc_dec_dc_unpredict_mcu_plane(_dec,_pipe,_pli) \
1.48 + ((*(_dec)->opt_vtable.dc_unpredict_mcu_plane)(_dec,_pipe,_pli))
1.49 +# endif
1.50 +# else
1.51 +# if !defined(oc_dec_dc_unpredict_mcu_plane)
1.52 +# define oc_dec_dc_unpredict_mcu_plane oc_dec_dc_unpredict_mcu_plane_c
1.53 +# endif
1.54 +# endif
1.55 +
1.56 +
1.57 +
1.58 +/*Constants for the packet-in state machine specific to the decoder.*/
1.59 +
1.60 +/*Next packet to read: Data packet.*/
1.61 +#define OC_PACKET_DATA (0)
1.62 +
1.63 +
1.64 +
1.65 +struct th_setup_info{
1.66 + /*The Huffman codes.*/
1.67 + ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES];
1.68 + /*The quantization parameters.*/
1.69 + th_quant_info qinfo;
1.70 +};
1.71 +
1.72 +
1.73 +
1.74 +/*Decoder specific functions with accelerated variants.*/
1.75 +struct oc_dec_opt_vtable{
1.76 + void (*dc_unpredict_mcu_plane)(oc_dec_ctx *_dec,
1.77 + oc_dec_pipeline_state *_pipe,int _pli);
1.78 +};
1.79 +
1.80 +
1.81 +
1.82 +struct oc_dec_pipeline_state{
1.83 + /*Decoded DCT coefficients.
1.84 + These are placed here instead of on the stack so that they can persist
1.85 + between blocks, which makes clearing them back to zero much faster when
1.86 + only a few non-zero coefficients were decoded.
1.87 + It requires at least 65 elements because the zig-zag index array uses the
1.88 + 65th element as a dumping ground for out-of-range indices to protect us
1.89 + from buffer overflow.
1.90 + We make it fully twice as large so that the second half can serve as the
1.91 + reconstruction buffer, which saves passing another parameter to all the
1.92 + acceleration functios.
1.93 + It also solves problems with 16-byte alignment for NEON on ARM.
1.94 + gcc (as of 4.2.1) only seems to be able to give stack variables 8-byte
1.95 + alignment, and silently produces incorrect results if you ask for 16.
1.96 + Finally, keeping it off the stack means there's less likely to be a data
1.97 + hazard beween the NEON co-processor and the regular ARM core, which avoids
1.98 + unnecessary stalls.*/
1.99 + OC_ALIGN16(ogg_int16_t dct_coeffs[128]);
1.100 + OC_ALIGN16(signed char bounding_values[256]);
1.101 + ptrdiff_t ti[3][64];
1.102 + ptrdiff_t ebi[3][64];
1.103 + ptrdiff_t eob_runs[3][64];
1.104 + const ptrdiff_t *coded_fragis[3];
1.105 + const ptrdiff_t *uncoded_fragis[3];
1.106 + ptrdiff_t ncoded_fragis[3];
1.107 + ptrdiff_t nuncoded_fragis[3];
1.108 + const ogg_uint16_t *dequant[3][3][2];
1.109 + int fragy0[3];
1.110 + int fragy_end[3];
1.111 + int pred_last[3][4];
1.112 + int mcu_nvfrags;
1.113 + int loop_filter;
1.114 + int pp_level;
1.115 +};
1.116 +
1.117 +
1.118 +struct th_dec_ctx{
1.119 + /*Shared encoder/decoder state.*/
1.120 + oc_theora_state state;
1.121 + /*Whether or not packets are ready to be emitted.
1.122 + This takes on negative values while there are remaining header packets to
1.123 + be emitted, reaches 0 when the codec is ready for input, and goes to 1
1.124 + when a frame has been processed and a data packet is ready.*/
1.125 + int packet_state;
1.126 + /*Buffer in which to assemble packets.*/
1.127 + oc_pack_buf opb;
1.128 + /*Huffman decode trees.*/
1.129 + ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES];
1.130 + /*The index of the first token in each plane for each coefficient.*/
1.131 + ptrdiff_t ti0[3][64];
1.132 + /*The number of outstanding EOB runs at the start of each coefficient in each
1.133 + plane.*/
1.134 + ptrdiff_t eob_runs[3][64];
1.135 + /*The DCT token lists.*/
1.136 + unsigned char *dct_tokens;
1.137 + /*The extra bits associated with DCT tokens.*/
1.138 + unsigned char *extra_bits;
1.139 + /*The number of dct tokens unpacked so far.*/
1.140 + int dct_tokens_count;
1.141 + /*The out-of-loop post-processing level.*/
1.142 + int pp_level;
1.143 + /*The DC scale used for out-of-loop deblocking.*/
1.144 + int pp_dc_scale[64];
1.145 + /*The sharpen modifier used for out-of-loop deringing.*/
1.146 + int pp_sharp_mod[64];
1.147 + /*The DC quantization index of each block.*/
1.148 + unsigned char *dc_qis;
1.149 + /*The variance of each block.*/
1.150 + int *variances;
1.151 + /*The storage for the post-processed frame buffer.*/
1.152 + unsigned char *pp_frame_data;
1.153 + /*Whether or not the post-processsed frame buffer has space for chroma.*/
1.154 + int pp_frame_state;
1.155 + /*The buffer used for the post-processed frame.
1.156 + Note that this is _not_ guaranteed to have the same strides and offsets as
1.157 + the reference frame buffers.*/
1.158 + th_ycbcr_buffer pp_frame_buf;
1.159 + /*The striped decode callback function.*/
1.160 + th_stripe_callback stripe_cb;
1.161 + oc_dec_pipeline_state pipe;
1.162 +# if defined(OC_DEC_USE_VTABLE)
1.163 + /*Table for decoder acceleration functions.*/
1.164 + oc_dec_opt_vtable opt_vtable;
1.165 +# endif
1.166 +# if defined(HAVE_CAIRO)
1.167 + /*Output metrics for debugging.*/
1.168 + int telemetry;
1.169 + int telemetry_mbmode;
1.170 + int telemetry_mv;
1.171 + int telemetry_qi;
1.172 + int telemetry_bits;
1.173 + int telemetry_frame_bytes;
1.174 + int telemetry_coding_bytes;
1.175 + int telemetry_mode_bytes;
1.176 + int telemetry_mv_bytes;
1.177 + int telemetry_qi_bytes;
1.178 + int telemetry_dc_bytes;
1.179 + unsigned char *telemetry_frame_data;
1.180 +# endif
1.181 +};
1.182 +
1.183 +/*Default pure-C implementations of decoder-specific accelerated functions.*/
1.184 +void oc_dec_accel_init_c(oc_dec_ctx *_dec);
1.185 +
1.186 +void oc_dec_dc_unpredict_mcu_plane_c(oc_dec_ctx *_dec,
1.187 + oc_dec_pipeline_state *_pipe,int _pli);
1.188 +
1.189 +#endif
