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comparison: media/libtheora/lib/decint.h
media/libtheora/lib/decint.h
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- TOR_BUG_9701
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| -1:000000000000 | 0:bdb8162ce459 |
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| 1 /******************************************************************** | |
| 2 * * | |
| 3 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. * | |
| 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * | |
| 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * | |
| 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * | |
| 7 * * | |
| 8 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 * | |
| 9 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ * | |
| 10 * * | |
| 11 ******************************************************************** | |
| 12 | |
| 13 function: | |
| 14 last mod: $Id: decint.h 17457 2010-09-24 02:05:49Z tterribe $ | |
| 15 | |
| 16 ********************************************************************/ | |
| 17 | |
| 18 #include <limits.h> | |
| 19 #if !defined(_decint_H) | |
| 20 # define _decint_H (1) | |
| 21 # include "theora/theoradec.h" | |
| 22 # include "state.h" | |
| 23 # include "bitpack.h" | |
| 24 # include "huffdec.h" | |
| 25 # include "dequant.h" | |
| 26 | |
| 27 typedef struct th_setup_info oc_setup_info; | |
| 28 typedef struct oc_dec_opt_vtable oc_dec_opt_vtable; | |
| 29 typedef struct oc_dec_pipeline_state oc_dec_pipeline_state; | |
| 30 typedef struct th_dec_ctx oc_dec_ctx; | |
| 31 | |
| 32 | |
| 33 | |
| 34 /*Decoder-specific accelerated functions.*/ | |
| 35 # if defined(OC_C64X_ASM) | |
| 36 # include "c64x/c64xdec.h" | |
| 37 # endif | |
| 38 | |
| 39 # if !defined(oc_dec_accel_init) | |
| 40 # define oc_dec_accel_init oc_dec_accel_init_c | |
| 41 # endif | |
| 42 # if defined(OC_DEC_USE_VTABLE) | |
| 43 # if !defined(oc_dec_dc_unpredict_mcu_plane) | |
| 44 # define oc_dec_dc_unpredict_mcu_plane(_dec,_pipe,_pli) \ | |
| 45 ((*(_dec)->opt_vtable.dc_unpredict_mcu_plane)(_dec,_pipe,_pli)) | |
| 46 # endif | |
| 47 # else | |
| 48 # if !defined(oc_dec_dc_unpredict_mcu_plane) | |
| 49 # define oc_dec_dc_unpredict_mcu_plane oc_dec_dc_unpredict_mcu_plane_c | |
| 50 # endif | |
| 51 # endif | |
| 52 | |
| 53 | |
| 54 | |
| 55 /*Constants for the packet-in state machine specific to the decoder.*/ | |
| 56 | |
| 57 /*Next packet to read: Data packet.*/ | |
| 58 #define OC_PACKET_DATA (0) | |
| 59 | |
| 60 | |
| 61 | |
| 62 struct th_setup_info{ | |
| 63 /*The Huffman codes.*/ | |
| 64 ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES]; | |
| 65 /*The quantization parameters.*/ | |
| 66 th_quant_info qinfo; | |
| 67 }; | |
| 68 | |
| 69 | |
| 70 | |
| 71 /*Decoder specific functions with accelerated variants.*/ | |
| 72 struct oc_dec_opt_vtable{ | |
| 73 void (*dc_unpredict_mcu_plane)(oc_dec_ctx *_dec, | |
| 74 oc_dec_pipeline_state *_pipe,int _pli); | |
| 75 }; | |
| 76 | |
| 77 | |
| 78 | |
| 79 struct oc_dec_pipeline_state{ | |
| 80 /*Decoded DCT coefficients. | |
| 81 These are placed here instead of on the stack so that they can persist | |
| 82 between blocks, which makes clearing them back to zero much faster when | |
| 83 only a few non-zero coefficients were decoded. | |
| 84 It requires at least 65 elements because the zig-zag index array uses the | |
| 85 65th element as a dumping ground for out-of-range indices to protect us | |
| 86 from buffer overflow. | |
| 87 We make it fully twice as large so that the second half can serve as the | |
| 88 reconstruction buffer, which saves passing another parameter to all the | |
| 89 acceleration functios. | |
| 90 It also solves problems with 16-byte alignment for NEON on ARM. | |
| 91 gcc (as of 4.2.1) only seems to be able to give stack variables 8-byte | |
| 92 alignment, and silently produces incorrect results if you ask for 16. | |
| 93 Finally, keeping it off the stack means there's less likely to be a data | |
| 94 hazard beween the NEON co-processor and the regular ARM core, which avoids | |
| 95 unnecessary stalls.*/ | |
| 96 OC_ALIGN16(ogg_int16_t dct_coeffs[128]); | |
| 97 OC_ALIGN16(signed char bounding_values[256]); | |
| 98 ptrdiff_t ti[3][64]; | |
| 99 ptrdiff_t ebi[3][64]; | |
| 100 ptrdiff_t eob_runs[3][64]; | |
| 101 const ptrdiff_t *coded_fragis[3]; | |
| 102 const ptrdiff_t *uncoded_fragis[3]; | |
| 103 ptrdiff_t ncoded_fragis[3]; | |
| 104 ptrdiff_t nuncoded_fragis[3]; | |
| 105 const ogg_uint16_t *dequant[3][3][2]; | |
| 106 int fragy0[3]; | |
| 107 int fragy_end[3]; | |
| 108 int pred_last[3][4]; | |
| 109 int mcu_nvfrags; | |
| 110 int loop_filter; | |
| 111 int pp_level; | |
| 112 }; | |
| 113 | |
| 114 | |
| 115 struct th_dec_ctx{ | |
| 116 /*Shared encoder/decoder state.*/ | |
| 117 oc_theora_state state; | |
| 118 /*Whether or not packets are ready to be emitted. | |
| 119 This takes on negative values while there are remaining header packets to | |
| 120 be emitted, reaches 0 when the codec is ready for input, and goes to 1 | |
| 121 when a frame has been processed and a data packet is ready.*/ | |
| 122 int packet_state; | |
| 123 /*Buffer in which to assemble packets.*/ | |
| 124 oc_pack_buf opb; | |
| 125 /*Huffman decode trees.*/ | |
| 126 ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES]; | |
| 127 /*The index of the first token in each plane for each coefficient.*/ | |
| 128 ptrdiff_t ti0[3][64]; | |
| 129 /*The number of outstanding EOB runs at the start of each coefficient in each | |
| 130 plane.*/ | |
| 131 ptrdiff_t eob_runs[3][64]; | |
| 132 /*The DCT token lists.*/ | |
| 133 unsigned char *dct_tokens; | |
| 134 /*The extra bits associated with DCT tokens.*/ | |
| 135 unsigned char *extra_bits; | |
| 136 /*The number of dct tokens unpacked so far.*/ | |
| 137 int dct_tokens_count; | |
| 138 /*The out-of-loop post-processing level.*/ | |
| 139 int pp_level; | |
| 140 /*The DC scale used for out-of-loop deblocking.*/ | |
| 141 int pp_dc_scale[64]; | |
| 142 /*The sharpen modifier used for out-of-loop deringing.*/ | |
| 143 int pp_sharp_mod[64]; | |
| 144 /*The DC quantization index of each block.*/ | |
| 145 unsigned char *dc_qis; | |
| 146 /*The variance of each block.*/ | |
| 147 int *variances; | |
| 148 /*The storage for the post-processed frame buffer.*/ | |
| 149 unsigned char *pp_frame_data; | |
| 150 /*Whether or not the post-processsed frame buffer has space for chroma.*/ | |
| 151 int pp_frame_state; | |
| 152 /*The buffer used for the post-processed frame. | |
| 153 Note that this is _not_ guaranteed to have the same strides and offsets as | |
| 154 the reference frame buffers.*/ | |
| 155 th_ycbcr_buffer pp_frame_buf; | |
| 156 /*The striped decode callback function.*/ | |
| 157 th_stripe_callback stripe_cb; | |
| 158 oc_dec_pipeline_state pipe; | |
| 159 # if defined(OC_DEC_USE_VTABLE) | |
| 160 /*Table for decoder acceleration functions.*/ | |
| 161 oc_dec_opt_vtable opt_vtable; | |
| 162 # endif | |
| 163 # if defined(HAVE_CAIRO) | |
| 164 /*Output metrics for debugging.*/ | |
| 165 int telemetry; | |
| 166 int telemetry_mbmode; | |
| 167 int telemetry_mv; | |
| 168 int telemetry_qi; | |
| 169 int telemetry_bits; | |
| 170 int telemetry_frame_bytes; | |
| 171 int telemetry_coding_bytes; | |
| 172 int telemetry_mode_bytes; | |
| 173 int telemetry_mv_bytes; | |
| 174 int telemetry_qi_bytes; | |
| 175 int telemetry_dc_bytes; | |
| 176 unsigned char *telemetry_frame_data; | |
| 177 # endif | |
| 178 }; | |
| 179 | |
| 180 /*Default pure-C implementations of decoder-specific accelerated functions.*/ | |
| 181 void oc_dec_accel_init_c(oc_dec_ctx *_dec); | |
| 182 | |
| 183 void oc_dec_dc_unpredict_mcu_plane_c(oc_dec_ctx *_dec, | |
| 184 oc_dec_pipeline_state *_pipe,int _pli); | |
| 185 | |
| 186 #endif |
