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Diffstat (limited to 'media/libtheora/lib/decint.h')
| -rw-r--r-- | media/libtheora/lib/decint.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/media/libtheora/lib/decint.h b/media/libtheora/lib/decint.h new file mode 100644 index 000000000..bd6522273 --- /dev/null +++ b/media/libtheora/lib/decint.h @@ -0,0 +1,186 @@ +/******************************************************************** + * * + * 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 17457 2010-09-24 02:05:49Z tterribe $ + + ********************************************************************/ + +#include <limits.h> +#if !defined(_decint_H) +# define _decint_H (1) +# include "theora/theoradec.h" +# include "state.h" +# include "bitpack.h" +# include "huffdec.h" +# include "dequant.h" + +typedef struct th_setup_info oc_setup_info; +typedef struct oc_dec_opt_vtable oc_dec_opt_vtable; +typedef struct oc_dec_pipeline_state oc_dec_pipeline_state; +typedef struct th_dec_ctx oc_dec_ctx; + + + +/*Decoder-specific accelerated functions.*/ +# if defined(OC_C64X_ASM) +# include "c64x/c64xdec.h" +# endif + +# if !defined(oc_dec_accel_init) +# define oc_dec_accel_init oc_dec_accel_init_c +# endif +# if defined(OC_DEC_USE_VTABLE) +# if !defined(oc_dec_dc_unpredict_mcu_plane) +# define oc_dec_dc_unpredict_mcu_plane(_dec,_pipe,_pli) \ + ((*(_dec)->opt_vtable.dc_unpredict_mcu_plane)(_dec,_pipe,_pli)) +# endif +# else +# if !defined(oc_dec_dc_unpredict_mcu_plane) +# define oc_dec_dc_unpredict_mcu_plane oc_dec_dc_unpredict_mcu_plane_c +# endif +# endif + + + +/*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.*/ + ogg_int16_t *huff_tables[TH_NHUFFMAN_TABLES]; + /*The quantization parameters.*/ + th_quant_info qinfo; +}; + + + +/*Decoder specific functions with accelerated variants.*/ +struct oc_dec_opt_vtable{ + void (*dc_unpredict_mcu_plane)(oc_dec_ctx *_dec, + oc_dec_pipeline_state *_pipe,int _pli); +}; + + + +struct oc_dec_pipeline_state{ + /*Decoded DCT coefficients. + These are placed here instead of on the stack so that they can persist + between blocks, which makes clearing them back to zero much faster when + only a few non-zero coefficients were decoded. + It requires at least 65 elements because the zig-zag index array uses the + 65th element as a dumping ground for out-of-range indices to protect us + from buffer overflow. + We make it fully twice as large so that the second half can serve as the + reconstruction buffer, which saves passing another parameter to all the + acceleration functios. + It also solves problems with 16-byte alignment for NEON on ARM. + gcc (as of 4.2.1) only seems to be able to give stack variables 8-byte + alignment, and silently produces incorrect results if you ask for 16. + Finally, keeping it off the stack means there's less likely to be a data + hazard beween the NEON co-processor and the regular ARM core, which avoids + unnecessary stalls.*/ + OC_ALIGN16(ogg_int16_t dct_coeffs[128]); + OC_ALIGN16(signed char bounding_values[256]); + ptrdiff_t ti[3][64]; + ptrdiff_t ebi[3][64]; + ptrdiff_t eob_runs[3][64]; + const ptrdiff_t *coded_fragis[3]; + const ptrdiff_t *uncoded_fragis[3]; + ptrdiff_t ncoded_fragis[3]; + ptrdiff_t nuncoded_fragis[3]; + const ogg_uint16_t *dequant[3][3][2]; + int fragy0[3]; + int fragy_end[3]; + int pred_last[3][4]; + int mcu_nvfrags; + int loop_filter; + int pp_level; +}; + + +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.*/ + ogg_int16_t *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; + oc_dec_pipeline_state pipe; +# if defined(OC_DEC_USE_VTABLE) + /*Table for decoder acceleration functions.*/ + oc_dec_opt_vtable opt_vtable; +# endif +# 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 +}; + +/*Default pure-C implementations of decoder-specific accelerated functions.*/ +void oc_dec_accel_init_c(oc_dec_ctx *_dec); + +void oc_dec_dc_unpredict_mcu_plane_c(oc_dec_ctx *_dec, + oc_dec_pipeline_state *_pipe,int _pli); + +#endif |