510 lines
20 KiB
C++
510 lines
20 KiB
C++
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
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* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
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* *
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********************************************************************
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function:
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last mod: $Id: internal.h 16503 2009-08-22 18:14:02Z giles $
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********************************************************************/
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#if !defined(_internal_H)
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# define _internal_H (1)
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# include <stdlib.h>
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# include <limits.h>
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# if defined(HAVE_CONFIG_H)
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# include <config.h>
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# endif
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# include "theora/codec.h"
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# include "theora/theora.h"
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# if defined(_MSC_VER)
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/*Disable missing EMMS warnings.*/
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# pragma warning(disable:4799)
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/*Thank you Microsoft, I know the order of operations.*/
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# pragma warning(disable:4554)
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# endif
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/*You, too, gcc.*/
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# if defined(__GNUC_PREREQ)
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# if __GNUC_PREREQ(4,2)
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# pragma GCC diagnostic ignored "-Wparentheses"
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# endif
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# endif
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# include "ocintrin.h"
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# include "huffman.h"
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# include "quant.h"
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/*Some assembly constructs require aligned operands.*/
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# if defined(OC_X86_ASM)
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# if defined(__GNUC__)
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# define OC_ALIGN8(expr) expr __attribute__((aligned(8)))
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# define OC_ALIGN16(expr) expr __attribute__((aligned(16)))
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# elif defined(_MSC_VER)
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# define OC_ALIGN8(expr) __declspec (align(8)) expr
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# define OC_ALIGN16(expr) __declspec (align(16)) expr
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# endif
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# endif
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# if !defined(OC_ALIGN8)
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# define OC_ALIGN8(expr) expr
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# endif
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# if !defined(OC_ALIGN16)
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# define OC_ALIGN16(expr) expr
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# endif
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typedef struct oc_sb_flags oc_sb_flags;
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typedef struct oc_border_info oc_border_info;
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typedef struct oc_fragment oc_fragment;
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typedef struct oc_fragment_plane oc_fragment_plane;
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typedef struct oc_base_opt_vtable oc_base_opt_vtable;
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typedef struct oc_base_opt_data oc_base_opt_data;
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typedef struct oc_state_dispatch_vtable oc_state_dispatch_vtable;
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typedef struct oc_theora_state oc_theora_state;
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/*This library's version.*/
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# define OC_VENDOR_STRING "Xiph.Org libtheora 1.1 20090822 (Thusnelda)"
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/*Theora bitstream version.*/
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# define TH_VERSION_MAJOR (3)
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# define TH_VERSION_MINOR (2)
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# define TH_VERSION_SUB (1)
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# define TH_VERSION_CHECK(_info,_maj,_min,_sub) \
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((_info)->version_major>(_maj)||(_info)->version_major==(_maj)&& \
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((_info)->version_minor>(_min)||(_info)->version_minor==(_min)&& \
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(_info)->version_subminor>=(_sub)))
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/*A keyframe.*/
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#define OC_INTRA_FRAME (0)
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/*A predicted frame.*/
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#define OC_INTER_FRAME (1)
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/*A frame of unknown type (frame type decision has not yet been made).*/
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#define OC_UNKWN_FRAME (-1)
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/*The amount of padding to add to the reconstructed frame buffers on all
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sides.
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This is used to allow unrestricted motion vectors without special casing.
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This must be a multiple of 2.*/
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#define OC_UMV_PADDING (16)
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/*Frame classification indices.*/
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/*The previous golden frame.*/
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#define OC_FRAME_GOLD (0)
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/*The previous frame.*/
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#define OC_FRAME_PREV (1)
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/*The current frame.*/
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#define OC_FRAME_SELF (2)
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/*The input or output buffer.*/
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#define OC_FRAME_IO (3)
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/*Macroblock modes.*/
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/*Macro block is invalid: It is never coded.*/
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#define OC_MODE_INVALID (-1)
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/*Encoded difference from the same macro block in the previous frame.*/
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#define OC_MODE_INTER_NOMV (0)
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/*Encoded with no motion compensated prediction.*/
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#define OC_MODE_INTRA (1)
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/*Encoded difference from the previous frame offset by the given motion
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vector.*/
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#define OC_MODE_INTER_MV (2)
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/*Encoded difference from the previous frame offset by the last coded motion
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vector.*/
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#define OC_MODE_INTER_MV_LAST (3)
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/*Encoded difference from the previous frame offset by the second to last
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coded motion vector.*/
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#define OC_MODE_INTER_MV_LAST2 (4)
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/*Encoded difference from the same macro block in the previous golden
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frame.*/
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#define OC_MODE_GOLDEN_NOMV (5)
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/*Encoded difference from the previous golden frame offset by the given motion
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vector.*/
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#define OC_MODE_GOLDEN_MV (6)
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/*Encoded difference from the previous frame offset by the individual motion
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vectors given for each block.*/
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#define OC_MODE_INTER_MV_FOUR (7)
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/*The number of (coded) modes.*/
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#define OC_NMODES (8)
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/*Determines the reference frame used for a given MB mode.*/
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#define OC_FRAME_FOR_MODE(_x) \
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OC_UNIBBLE_TABLE32(OC_FRAME_PREV,OC_FRAME_SELF,OC_FRAME_PREV,OC_FRAME_PREV, \
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OC_FRAME_PREV,OC_FRAME_GOLD,OC_FRAME_GOLD,OC_FRAME_PREV,(_x))
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/*Constants for the packet state machine common between encoder and decoder.*/
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/*Next packet to emit/read: Codec info header.*/
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#define OC_PACKET_INFO_HDR (-3)
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/*Next packet to emit/read: Comment header.*/
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#define OC_PACKET_COMMENT_HDR (-2)
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/*Next packet to emit/read: Codec setup header.*/
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#define OC_PACKET_SETUP_HDR (-1)
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/*No more packets to emit/read.*/
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#define OC_PACKET_DONE (INT_MAX)
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/*Super blocks are 32x32 segments of pixels in a single color plane indexed
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in image order.
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Internally, super blocks are broken up into four quadrants, each of which
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contains a 2x2 pattern of blocks, each of which is an 8x8 block of pixels.
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Quadrants, and the blocks within them, are indexed in a special order called
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a "Hilbert curve" within the super block.
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In order to differentiate between the Hilbert-curve indexing strategy and
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the regular image order indexing strategy, blocks indexed in image order
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are called "fragments".
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Fragments are indexed in image order, left to right, then bottom to top,
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from Y' plane to Cb plane to Cr plane.
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The co-located fragments in all image planes corresponding to the location
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of a single quadrant of a luma plane super block form a macro block.
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Thus there is only a single set of macro blocks for all planes, each of which
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contains between 6 and 12 fragments, depending on the pixel format.
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Therefore macro block information is kept in a separate set of arrays from
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super blocks to avoid unused space in the other planes.
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The lists are indexed in super block order.
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That is, the macro block corresponding to the macro block mbi in (luma plane)
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super block sbi is at index (sbi<<2|mbi).
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Thus the number of macro blocks in each dimension is always twice the number
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of super blocks, even when only an odd number fall inside the coded frame.
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These "extra" macro blocks are just an artifact of our internal data layout,
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and not part of the coded stream; they are flagged with a negative MB mode.*/
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/*A single quadrant of the map from a super block to fragment numbers.*/
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typedef ptrdiff_t oc_sb_map_quad[4];
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/*A map from a super block to fragment numbers.*/
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typedef oc_sb_map_quad oc_sb_map[4];
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/*A single plane of the map from a macro block to fragment numbers.*/
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typedef ptrdiff_t oc_mb_map_plane[4];
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/*A map from a macro block to fragment numbers.*/
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typedef oc_mb_map_plane oc_mb_map[3];
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/*A motion vector.*/
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typedef signed char oc_mv[2];
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/*Super block information.*/
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struct oc_sb_flags{
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unsigned char coded_fully:1;
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unsigned char coded_partially:1;
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unsigned char quad_valid:4;
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};
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/*Information about a fragment which intersects the border of the displayable
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region.
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This marks which pixels belong to the displayable region.*/
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struct oc_border_info{
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/*A bit mask marking which pixels are in the displayable region.
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Pixel (x,y) corresponds to bit (y<<3|x).*/
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ogg_int64_t mask;
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/*The number of pixels in the displayable region.
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This is always positive, and always less than 64.*/
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int npixels;
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};
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/*Fragment information.*/
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struct oc_fragment{
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/*A flag indicating whether or not this fragment is coded.*/
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unsigned coded:1;
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/*A flag indicating that this entire fragment lies outside the displayable
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region of the frame.
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Note the contrast with an invalid macro block, which is outside the coded
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frame, not just the displayable one.
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There are no fragments outside the coded frame by construction.*/
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unsigned invalid:1;
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/*The index of the quality index used for this fragment's AC coefficients.*/
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unsigned qii:6;
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/*The mode of the macroblock this fragment belongs to.*/
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unsigned mb_mode:3;
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/*The index of the associated border information for fragments which lie
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partially outside the displayable region.
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For fragments completely inside or outside this region, this is -1.
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Note that the C standard requires an explicit signed keyword for bitfield
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types, since some compilers may treat them as unsigned without it.*/
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signed int borderi:5;
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/*The prediction-corrected DC component.
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Note that the C standard requires an explicit signed keyword for bitfield
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types, since some compilers may treat them as unsigned without it.*/
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signed int dc:16;
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};
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/*A description of each fragment plane.*/
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struct oc_fragment_plane{
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/*The number of fragments in the horizontal direction.*/
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int nhfrags;
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/*The number of fragments in the vertical direction.*/
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int nvfrags;
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/*The offset of the first fragment in the plane.*/
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ptrdiff_t froffset;
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/*The total number of fragments in the plane.*/
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ptrdiff_t nfrags;
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/*The number of super blocks in the horizontal direction.*/
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unsigned nhsbs;
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/*The number of super blocks in the vertical direction.*/
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unsigned nvsbs;
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/*The offset of the first super block in the plane.*/
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unsigned sboffset;
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/*The total number of super blocks in the plane.*/
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unsigned nsbs;
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};
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/*The shared (encoder and decoder) functions that have accelerated variants.*/
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struct oc_base_opt_vtable{
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void (*frag_copy)(unsigned char *_dst,
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const unsigned char *_src,int _ystride);
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void (*frag_recon_intra)(unsigned char *_dst,int _ystride,
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const ogg_int16_t _residue[64]);
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void (*frag_recon_inter)(unsigned char *_dst,
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const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]);
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void (*frag_recon_inter2)(unsigned char *_dst,const unsigned char *_src1,
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const unsigned char *_src2,int _ystride,const ogg_int16_t _residue[64]);
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void (*idct8x8)(ogg_int16_t _y[64],int _last_zzi);
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void (*state_frag_recon)(const oc_theora_state *_state,ptrdiff_t _fragi,
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int _pli,ogg_int16_t _dct_coeffs[64],int _last_zzi,ogg_uint16_t _dc_quant);
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void (*state_frag_copy_list)(const oc_theora_state *_state,
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const ptrdiff_t *_fragis,ptrdiff_t _nfragis,
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int _dst_frame,int _src_frame,int _pli);
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void (*state_loop_filter_frag_rows)(const oc_theora_state *_state,
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int _bv[256],int _refi,int _pli,int _fragy0,int _fragy_end);
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void (*restore_fpu)(void);
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};
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/*The shared (encoder and decoder) tables that vary according to which variants
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of the above functions are used.*/
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struct oc_base_opt_data{
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const unsigned char *dct_fzig_zag;
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};
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/*State information common to both the encoder and decoder.*/
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struct oc_theora_state{
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/*The stream information.*/
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th_info info;
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/*Table for shared accelerated functions.*/
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oc_base_opt_vtable opt_vtable;
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/*Table for shared data used by accelerated functions.*/
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oc_base_opt_data opt_data;
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/*CPU flags to detect the presence of extended instruction sets.*/
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ogg_uint32_t cpu_flags;
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/*The fragment plane descriptions.*/
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oc_fragment_plane fplanes[3];
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/*The list of fragments, indexed in image order.*/
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oc_fragment *frags;
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/*The the offset into the reference frame buffer to the upper-left pixel of
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each fragment.*/
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ptrdiff_t *frag_buf_offs;
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/*The motion vector for each fragment.*/
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oc_mv *frag_mvs;
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/*The total number of fragments in a single frame.*/
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ptrdiff_t nfrags;
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/*The list of super block maps, indexed in image order.*/
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oc_sb_map *sb_maps;
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/*The list of super block flags, indexed in image order.*/
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oc_sb_flags *sb_flags;
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/*The total number of super blocks in a single frame.*/
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unsigned nsbs;
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/*The fragments from each color plane that belong to each macro block.
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Fragments are stored in image order (left to right then top to bottom).
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When chroma components are decimated, the extra fragments have an index of
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-1.*/
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oc_mb_map *mb_maps;
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/*The list of macro block modes.
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A negative number indicates the macro block lies entirely outside the
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coded frame.*/
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signed char *mb_modes;
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/*The number of macro blocks in the X direction.*/
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unsigned nhmbs;
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/*The number of macro blocks in the Y direction.*/
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unsigned nvmbs;
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/*The total number of macro blocks.*/
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size_t nmbs;
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/*The list of coded fragments, in coded order.
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Uncoded fragments are stored in reverse order from the end of the list.*/
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ptrdiff_t *coded_fragis;
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/*The number of coded fragments in each plane.*/
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ptrdiff_t ncoded_fragis[3];
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/*The total number of coded fragments.*/
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ptrdiff_t ntotal_coded_fragis;
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/*The index of the buffers being used for each OC_FRAME_* reference frame.*/
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int ref_frame_idx[4];
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/*The actual buffers used for the previously decoded frames.*/
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th_ycbcr_buffer ref_frame_bufs[4];
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/*The storage for the reference frame buffers.*/
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unsigned char *ref_frame_data[4];
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/*The strides for each plane in the reference frames.*/
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int ref_ystride[3];
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/*The number of unique border patterns.*/
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int nborders;
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/*The unique border patterns for all border fragments.
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The borderi field of fragments which straddle the border indexes this
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list.*/
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oc_border_info borders[16];
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/*The frame number of the last keyframe.*/
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ogg_int64_t keyframe_num;
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/*The frame number of the current frame.*/
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ogg_int64_t curframe_num;
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/*The granpos of the current frame.*/
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ogg_int64_t granpos;
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/*The type of the current frame.*/
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unsigned char frame_type;
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/*The bias to add to the frame count when computing granule positions.*/
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unsigned char granpos_bias;
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/*The number of quality indices used in the current frame.*/
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unsigned char nqis;
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/*The quality indices of the current frame.*/
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unsigned char qis[3];
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/*The dequantization tables, stored in zig-zag order, and indexed by
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qi, pli, qti, and zzi.*/
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ogg_uint16_t *dequant_tables[64][3][2];
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OC_ALIGN16(oc_quant_table dequant_table_data[64][3][2]);
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/*Loop filter strength parameters.*/
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unsigned char loop_filter_limits[64];
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};
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/*The function type used to fill in the chroma plane motion vectors for a
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macro block when 4 different motion vectors are specified in the luma
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plane.
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_cbmvs: The chroma block-level motion vectors to fill in.
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_lmbmv: The luma macro-block level motion vector to fill in for use in
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prediction.
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_lbmvs: The luma block-level motion vectors.*/
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typedef void (*oc_set_chroma_mvs_func)(oc_mv _cbmvs[4],const oc_mv _lbmvs[4]);
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/*A map from the index in the zig zag scan to the coefficient number in a
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block.*/
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extern const unsigned char OC_FZIG_ZAG[128];
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/*A map from the coefficient number in a block to its index in the zig zag
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scan.*/
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extern const unsigned char OC_IZIG_ZAG[64];
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/*A map from physical macro block ordering to bitstream macro block
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ordering within a super block.*/
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extern const unsigned char OC_MB_MAP[2][2];
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/*A list of the indices in the oc_mb_map array that can be valid for each of
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the various chroma decimation types.*/
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extern const unsigned char OC_MB_MAP_IDXS[TH_PF_NFORMATS][12];
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/*The number of indices in the oc_mb_map array that can be valid for each of
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the various chroma decimation types.*/
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extern const unsigned char OC_MB_MAP_NIDXS[TH_PF_NFORMATS];
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/*A table of functions used to fill in the Cb,Cr plane motion vectors for a
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macro block when 4 different motion vectors are specified in the luma
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plane.*/
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extern const oc_set_chroma_mvs_func OC_SET_CHROMA_MVS_TABLE[TH_PF_NFORMATS];
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int oc_ilog(unsigned _v);
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void **oc_malloc_2d(size_t _height,size_t _width,size_t _sz);
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void **oc_calloc_2d(size_t _height,size_t _width,size_t _sz);
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void oc_free_2d(void *_ptr);
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void oc_ycbcr_buffer_flip(th_ycbcr_buffer _dst,
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const th_ycbcr_buffer _src);
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int oc_state_init(oc_theora_state *_state,const th_info *_info,int _nrefs);
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void oc_state_clear(oc_theora_state *_state);
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void oc_state_vtable_init_c(oc_theora_state *_state);
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void oc_state_borders_fill_rows(oc_theora_state *_state,int _refi,int _pli,
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int _y0,int _yend);
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void oc_state_borders_fill_caps(oc_theora_state *_state,int _refi,int _pli);
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void oc_state_borders_fill(oc_theora_state *_state,int _refi);
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void oc_state_fill_buffer_ptrs(oc_theora_state *_state,int _buf_idx,
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th_ycbcr_buffer _img);
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int oc_state_mbi_for_pos(oc_theora_state *_state,int _mbx,int _mby);
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int oc_state_get_mv_offsets(const oc_theora_state *_state,int _offsets[2],
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int _pli,int _dx,int _dy);
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int oc_state_loop_filter_init(oc_theora_state *_state,int *_bv);
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void oc_state_loop_filter(oc_theora_state *_state,int _frame);
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#if defined(OC_DUMP_IMAGES)
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int oc_state_dump_frame(const oc_theora_state *_state,int _frame,
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const char *_suf);
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#endif
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/*Shared accelerated functions.*/
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void oc_frag_copy(const oc_theora_state *_state,unsigned char *_dst,
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const unsigned char *_src,int _ystride);
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void oc_frag_recon_intra(const oc_theora_state *_state,
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unsigned char *_dst,int _dst_ystride,const ogg_int16_t _residue[64]);
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void oc_frag_recon_inter(const oc_theora_state *_state,unsigned char *_dst,
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const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]);
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void oc_frag_recon_inter2(const oc_theora_state *_state,
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unsigned char *_dst,const unsigned char *_src1,const unsigned char *_src2,
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int _ystride,const ogg_int16_t _residue[64]);
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void oc_idct8x8(const oc_theora_state *_state,ogg_int16_t _y[64],int _last_zzi);
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void oc_state_frag_recon(const oc_theora_state *_state,ptrdiff_t _fragi,
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int _pli,ogg_int16_t _dct_coeffs[64],int _last_zzi,ogg_uint16_t _dc_quant);
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void oc_state_frag_copy_list(const oc_theora_state *_state,
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const ptrdiff_t *_fragis,ptrdiff_t _nfragis,
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int _dst_frame,int _src_frame,int _pli);
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void oc_state_loop_filter_frag_rows(const oc_theora_state *_state,
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int _bv[256],int _refi,int _pli,int _fragy0,int _fragy_end);
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void oc_restore_fpu(const oc_theora_state *_state);
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/*Default pure-C implementations.*/
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void oc_frag_copy_c(unsigned char *_dst,
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const unsigned char *_src,int _src_ystride);
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void oc_frag_recon_intra_c(unsigned char *_dst,int _dst_ystride,
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const ogg_int16_t _residue[64]);
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void oc_frag_recon_inter_c(unsigned char *_dst,
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const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]);
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void oc_frag_recon_inter2_c(unsigned char *_dst,const unsigned char *_src1,
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const unsigned char *_src2,int _ystride,const ogg_int16_t _residue[64]);
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void oc_idct8x8_c(ogg_int16_t _y[64],int _last_zzi);
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void oc_state_frag_recon_c(const oc_theora_state *_state,ptrdiff_t _fragi,
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int _pli,ogg_int16_t _dct_coeffs[64],int _last_zzi,ogg_uint16_t _dc_quant);
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void oc_state_frag_copy_list_c(const oc_theora_state *_state,
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const ptrdiff_t *_fragis,ptrdiff_t _nfragis,
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int _dst_frame,int _src_frame,int _pli);
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void oc_state_loop_filter_frag_rows_c(const oc_theora_state *_state,
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int _bv[256],int _refi,int _pli,int _fragy0,int _fragy_end);
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void oc_restore_fpu_c(void);
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/*We need a way to call a few encoder functions without introducing a link-time
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dependency into the decoder, while still allowing the old alpha API which
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does not distinguish between encoder and decoder objects to be used.
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We do this by placing a function table at the start of the encoder object
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which can dispatch into the encoder library.
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We do a similar thing for the decoder in case we ever decide to split off a
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common base library.*/
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typedef void (*oc_state_clear_func)(theora_state *_th);
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typedef int (*oc_state_control_func)(theora_state *th,int _req,
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void *_buf,size_t _buf_sz);
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typedef ogg_int64_t (*oc_state_granule_frame_func)(theora_state *_th,
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ogg_int64_t _granulepos);
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typedef double (*oc_state_granule_time_func)(theora_state *_th,
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ogg_int64_t _granulepos);
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struct oc_state_dispatch_vtable{
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oc_state_clear_func clear;
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oc_state_control_func control;
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oc_state_granule_frame_func granule_frame;
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oc_state_granule_time_func granule_time;
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};
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#endif
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