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media/libtheora/lib/decint.h@6474c204b198 (annotated)

media/libtheora/lib/decint.h

Wed, 31 Dec 2014 06:09:35 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:09:35 +0100
changeset 0
6474c204b198
permissions
-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0 1 /********************************************************************
michael@0 2 * *
michael@0 3 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
michael@0 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
michael@0 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
michael@0 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
michael@0 7 * *
michael@0 8 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
michael@0 9 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
michael@0 10 * *
michael@0 11 ********************************************************************
michael@0 12
michael@0 13 function:
michael@0 14 last mod: $Id: decint.h 17457 2010-09-24 02:05:49Z tterribe $
michael@0 15
michael@0 16 ********************************************************************/
michael@0 17
michael@0 18 #include <limits.h>
michael@0 19 #if !defined(_decint_H)
michael@0 20 # define _decint_H (1)
michael@0 21 # include "theora/theoradec.h"
michael@0 22 # include "state.h"
michael@0 23 # include "bitpack.h"
michael@0 24 # include "huffdec.h"
michael@0 25 # include "dequant.h"
michael@0 26
michael@0 27 typedef struct th_setup_info oc_setup_info;
michael@0 28 typedef struct oc_dec_opt_vtable oc_dec_opt_vtable;
michael@0 29 typedef struct oc_dec_pipeline_state oc_dec_pipeline_state;
michael@0 30 typedef struct th_dec_ctx oc_dec_ctx;
michael@0 31
michael@0 32
michael@0 33
michael@0 34 /*Decoder-specific accelerated functions.*/
michael@0 35 # if defined(OC_C64X_ASM)
michael@0 36 # include "c64x/c64xdec.h"
michael@0 37 # endif
michael@0 38
michael@0 39 # if !defined(oc_dec_accel_init)
michael@0 40 # define oc_dec_accel_init oc_dec_accel_init_c
michael@0 41 # endif
michael@0 42 # if defined(OC_DEC_USE_VTABLE)
michael@0 43 # if !defined(oc_dec_dc_unpredict_mcu_plane)
michael@0 44 # define oc_dec_dc_unpredict_mcu_plane(_dec,_pipe,_pli) \
michael@0 45 ((*(_dec)->opt_vtable.dc_unpredict_mcu_plane)(_dec,_pipe,_pli))
michael@0 46 # endif
michael@0 47 # else
michael@0 48 # if !defined(oc_dec_dc_unpredict_mcu_plane)
michael@0 49 # define oc_dec_dc_unpredict_mcu_plane oc_dec_dc_unpredict_mcu_plane_c
michael@0 50 # endif
michael@0 51 # endif
michael@0 52
michael@0 53
michael@0 54
michael@0 55 /*Constants for the packet-in state machine specific to the decoder.*/
michael@0 56
michael@0 57 /*Next packet to read: Data packet.*/
michael@0 58 #define OC_PACKET_DATA (0)
michael@0 59
michael@0 60
michael@0 61
michael@0 62 struct th_setup_info{
michael@0 63 /*The Huffman codes.*/
michael@0 64 ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES];
michael@0 65 /*The quantization parameters.*/
michael@0 66 th_quant_info qinfo;
michael@0 67 };
michael@0 68
michael@0 69
michael@0 70
michael@0 71 /*Decoder specific functions with accelerated variants.*/
michael@0 72 struct oc_dec_opt_vtable{
michael@0 73 void (*dc_unpredict_mcu_plane)(oc_dec_ctx *_dec,
michael@0 74 oc_dec_pipeline_state *_pipe,int _pli);
michael@0 75 };
michael@0 76
michael@0 77
michael@0 78
michael@0 79 struct oc_dec_pipeline_state{
michael@0 80 /*Decoded DCT coefficients.
michael@0 81 These are placed here instead of on the stack so that they can persist
michael@0 82 between blocks, which makes clearing them back to zero much faster when
michael@0 83 only a few non-zero coefficients were decoded.
michael@0 84 It requires at least 65 elements because the zig-zag index array uses the
michael@0 85 65th element as a dumping ground for out-of-range indices to protect us
michael@0 86 from buffer overflow.
michael@0 87 We make it fully twice as large so that the second half can serve as the
michael@0 88 reconstruction buffer, which saves passing another parameter to all the
michael@0 89 acceleration functios.
michael@0 90 It also solves problems with 16-byte alignment for NEON on ARM.
michael@0 91 gcc (as of 4.2.1) only seems to be able to give stack variables 8-byte
michael@0 92 alignment, and silently produces incorrect results if you ask for 16.
michael@0 93 Finally, keeping it off the stack means there's less likely to be a data
michael@0 94 hazard beween the NEON co-processor and the regular ARM core, which avoids
michael@0 95 unnecessary stalls.*/
michael@0 96 OC_ALIGN16(ogg_int16_t dct_coeffs[128]);
michael@0 97 OC_ALIGN16(signed char bounding_values[256]);
michael@0 98 ptrdiff_t ti[3][64];
michael@0 99 ptrdiff_t ebi[3][64];
michael@0 100 ptrdiff_t eob_runs[3][64];
michael@0 101 const ptrdiff_t *coded_fragis[3];
michael@0 102 const ptrdiff_t *uncoded_fragis[3];
michael@0 103 ptrdiff_t ncoded_fragis[3];
michael@0 104 ptrdiff_t nuncoded_fragis[3];
michael@0 105 const ogg_uint16_t *dequant[3][3][2];
michael@0 106 int fragy0[3];
michael@0 107 int fragy_end[3];
michael@0 108 int pred_last[3][4];
michael@0 109 int mcu_nvfrags;
michael@0 110 int loop_filter;
michael@0 111 int pp_level;
michael@0 112 };
michael@0 113
michael@0 114
michael@0 115 struct th_dec_ctx{
michael@0 116 /*Shared encoder/decoder state.*/
michael@0 117 oc_theora_state state;
michael@0 118 /*Whether or not packets are ready to be emitted.
michael@0 119 This takes on negative values while there are remaining header packets to
michael@0 120 be emitted, reaches 0 when the codec is ready for input, and goes to 1
michael@0 121 when a frame has been processed and a data packet is ready.*/
michael@0 122 int packet_state;
michael@0 123 /*Buffer in which to assemble packets.*/
michael@0 124 oc_pack_buf opb;
michael@0 125 /*Huffman decode trees.*/
michael@0 126 ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES];
michael@0 127 /*The index of the first token in each plane for each coefficient.*/
michael@0 128 ptrdiff_t ti0[3][64];
michael@0 129 /*The number of outstanding EOB runs at the start of each coefficient in each
michael@0 130 plane.*/
michael@0 131 ptrdiff_t eob_runs[3][64];
michael@0 132 /*The DCT token lists.*/
michael@0 133 unsigned char *dct_tokens;
michael@0 134 /*The extra bits associated with DCT tokens.*/
michael@0 135 unsigned char *extra_bits;
michael@0 136 /*The number of dct tokens unpacked so far.*/
michael@0 137 int dct_tokens_count;
michael@0 138 /*The out-of-loop post-processing level.*/
michael@0 139 int pp_level;
michael@0 140 /*The DC scale used for out-of-loop deblocking.*/
michael@0 141 int pp_dc_scale[64];
michael@0 142 /*The sharpen modifier used for out-of-loop deringing.*/
michael@0 143 int pp_sharp_mod[64];
michael@0 144 /*The DC quantization index of each block.*/
michael@0 145 unsigned char *dc_qis;
michael@0 146 /*The variance of each block.*/
michael@0 147 int *variances;
michael@0 148 /*The storage for the post-processed frame buffer.*/
michael@0 149 unsigned char *pp_frame_data;
michael@0 150 /*Whether or not the post-processsed frame buffer has space for chroma.*/
michael@0 151 int pp_frame_state;
michael@0 152 /*The buffer used for the post-processed frame.
michael@0 153 Note that this is _not_ guaranteed to have the same strides and offsets as
michael@0 154 the reference frame buffers.*/
michael@0 155 th_ycbcr_buffer pp_frame_buf;
michael@0 156 /*The striped decode callback function.*/
michael@0 157 th_stripe_callback stripe_cb;
michael@0 158 oc_dec_pipeline_state pipe;
michael@0 159 # if defined(OC_DEC_USE_VTABLE)
michael@0 160 /*Table for decoder acceleration functions.*/
michael@0 161 oc_dec_opt_vtable opt_vtable;
michael@0 162 # endif
michael@0 163 # if defined(HAVE_CAIRO)
michael@0 164 /*Output metrics for debugging.*/
michael@0 165 int telemetry;
michael@0 166 int telemetry_mbmode;
michael@0 167 int telemetry_mv;
michael@0 168 int telemetry_qi;
michael@0 169 int telemetry_bits;
michael@0 170 int telemetry_frame_bytes;
michael@0 171 int telemetry_coding_bytes;
michael@0 172 int telemetry_mode_bytes;
michael@0 173 int telemetry_mv_bytes;
michael@0 174 int telemetry_qi_bytes;
michael@0 175 int telemetry_dc_bytes;
michael@0 176 unsigned char *telemetry_frame_data;
michael@0 177 # endif
michael@0 178 };
michael@0 179
michael@0 180 /*Default pure-C implementations of decoder-specific accelerated functions.*/
michael@0 181 void oc_dec_accel_init_c(oc_dec_ctx *_dec);
michael@0 182
michael@0 183 void oc_dec_dc_unpredict_mcu_plane_c(oc_dec_ctx *_dec,
michael@0 184 oc_dec_pipeline_state *_pipe,int _pli);
michael@0 185
michael@0 186 #endif

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