Add m-esr52 at 52.6.0

1 files changed, 400 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/vp56.h b/media/ffvpx/libavcodec/vp56.h
new file mode 100644
index 000000000..56c30919b
--- /dev/null
+++ b/media/ffvpx/libavcodec/vp56.h
@@ -0,0 +1,400 @@
+/*
+ * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * VP5 and VP6 compatible video decoder (common features)
+ */
+
+#ifndef AVCODEC_VP56_H
+#define AVCODEC_VP56_H
+
+#include "get_bits.h"
+#include "hpeldsp.h"
+#include "bytestream.h"
+#include "h264chroma.h"
+#include "videodsp.h"
+#include "vp3dsp.h"
+#include "vp56dsp.h"
+
+typedef struct vp56_context VP56Context;
+
+typedef enum {
+    VP56_FRAME_NONE     =-1,
+    VP56_FRAME_CURRENT  = 0,
+    VP56_FRAME_PREVIOUS = 1,
+    VP56_FRAME_GOLDEN   = 2,
+    VP56_FRAME_GOLDEN2  = 3,
+} VP56Frame;
+
+typedef enum {
+    VP56_MB_INTER_NOVEC_PF = 0,  /**< Inter MB, no vector, from previous frame */
+    VP56_MB_INTRA          = 1,  /**< Intra MB */
+    VP56_MB_INTER_DELTA_PF = 2,  /**< Inter MB, above/left vector + delta, from previous frame */
+    VP56_MB_INTER_V1_PF    = 3,  /**< Inter MB, first vector, from previous frame */
+    VP56_MB_INTER_V2_PF    = 4,  /**< Inter MB, second vector, from previous frame */
+    VP56_MB_INTER_NOVEC_GF = 5,  /**< Inter MB, no vector, from golden frame */
+    VP56_MB_INTER_DELTA_GF = 6,  /**< Inter MB, above/left vector + delta, from golden frame */
+    VP56_MB_INTER_4V       = 7,  /**< Inter MB, 4 vectors, from previous frame */
+    VP56_MB_INTER_V1_GF    = 8,  /**< Inter MB, first vector, from golden frame */
+    VP56_MB_INTER_V2_GF    = 9,  /**< Inter MB, second vector, from golden frame */
+} VP56mb;
+
+typedef struct VP56Tree {
+  int8_t val;
+  int8_t prob_idx;
+} VP56Tree;
+
+typedef struct VP56mv {
+    DECLARE_ALIGNED(4, int16_t, x);
+    int16_t y;
+} VP56mv;
+
+#define VP56_SIZE_CHANGE 1
+
+typedef void (*VP56ParseVectorAdjustment)(VP56Context *s,
+                                          VP56mv *vect);
+typedef void (*VP56Filter)(VP56Context *s, uint8_t *dst, uint8_t *src,
+                           int offset1, int offset2, int stride,
+                           VP56mv mv, int mask, int select, int luma);
+typedef void (*VP56ParseCoeff)(VP56Context *s);
+typedef void (*VP56DefaultModelsInit)(VP56Context *s);
+typedef void (*VP56ParseVectorModels)(VP56Context *s);
+typedef int  (*VP56ParseCoeffModels)(VP56Context *s);
+typedef int  (*VP56ParseHeader)(VP56Context *s, const uint8_t *buf,
+                                int buf_size);
+
+typedef struct VP56RangeCoder {
+    int high;
+    int bits; /* stored negated (i.e. negative "bits" is a positive number of
+                 bits left) in order to eliminate a negate in cache refilling */
+    const uint8_t *buffer;
+    const uint8_t *end;
+    unsigned int code_word;
+} VP56RangeCoder;
+
+typedef struct VP56RefDc {
+    uint8_t not_null_dc;
+    VP56Frame ref_frame;
+    int16_t dc_coeff;
+} VP56RefDc;
+
+typedef struct VP56Macroblock {
+    uint8_t type;
+    VP56mv mv;
+} VP56Macroblock;
+
+typedef struct VP56Model {
+    uint8_t coeff_reorder[64];       /* used in vp6 only */
+    uint8_t coeff_index_to_pos[64];  /* used in vp6 only */
+    uint8_t vector_sig[2];           /* delta sign */
+    uint8_t vector_dct[2];           /* delta coding types */
+    uint8_t vector_pdi[2][2];        /* predefined delta init */
+    uint8_t vector_pdv[2][7];        /* predefined delta values */
+    uint8_t vector_fdv[2][8];        /* 8 bit delta value definition */
+    uint8_t coeff_dccv[2][11];       /* DC coeff value */
+    uint8_t coeff_ract[2][3][6][11]; /* Run/AC coding type and AC coeff value */
+    uint8_t coeff_acct[2][3][3][6][5];/* vp5 only AC coding type for coding group < 3 */
+    uint8_t coeff_dcct[2][36][5];    /* DC coeff coding type */
+    uint8_t coeff_runv[2][14];       /* run value (vp6 only) */
+    uint8_t mb_type[3][10][10];      /* model for decoding MB type */
+    uint8_t mb_types_stats[3][10][2];/* contextual, next MB type stats */
+} VP56Model;
+
+struct vp56_context {
+    AVCodecContext *avctx;
+    H264ChromaContext h264chroma;
+    HpelDSPContext hdsp;
+    VideoDSPContext vdsp;
+    VP3DSPContext vp3dsp;
+    VP56DSPContext vp56dsp;
+    uint8_t idct_scantable[64];
+    AVFrame *frames[4];
+    uint8_t *edge_emu_buffer_alloc;
+    uint8_t *edge_emu_buffer;
+    VP56RangeCoder c;
+    VP56RangeCoder cc;
+    VP56RangeCoder *ccp;
+    int sub_version;
+
+    /* frame info */
+    int golden_frame;
+    int plane_width[4];
+    int plane_height[4];
+    int mb_width;   /* number of horizontal MB */
+    int mb_height;  /* number of vertical MB */
+    int block_offset[6];
+
+    int quantizer;
+    uint16_t dequant_dc;
+    uint16_t dequant_ac;
+
+    /* DC predictors management */
+    VP56RefDc *above_blocks;
+    VP56RefDc left_block[4];
+    int above_block_idx[6];
+    int16_t prev_dc[3][3];    /* [plan][ref_frame] */
+
+    /* blocks / macroblock */
+    VP56mb mb_type;
+    VP56Macroblock *macroblocks;
+    DECLARE_ALIGNED(16, int16_t, block_coeff)[6][64];
+
+    /* motion vectors */
+    VP56mv mv[6];  /* vectors for each block in MB */
+    VP56mv vector_candidate[2];
+    int vector_candidate_pos;
+
+    /* filtering hints */
+    int filter_header;               /* used in vp6 only */
+    int deblock_filtering;
+    int filter_selection;
+    int filter_mode;
+    int max_vector_length;
+    int sample_variance_threshold;
+
+    uint8_t coeff_ctx[4][64];              /* used in vp5 only */
+    uint8_t coeff_ctx_last[4];             /* used in vp5 only */
+
+    int has_alpha;
+
+    /* upside-down flipping hints */
+    int flip;  /* are we flipping ? */
+    int frbi;  /* first row block index in MB */
+    int srbi;  /* second row block index in MB */
+    int stride[4];  /* stride for each plan */
+
+    const uint8_t *vp56_coord_div;
+    VP56ParseVectorAdjustment parse_vector_adjustment;
+    VP56Filter filter;
+    VP56ParseCoeff parse_coeff;
+    VP56DefaultModelsInit default_models_init;
+    VP56ParseVectorModels parse_vector_models;
+    VP56ParseCoeffModels parse_coeff_models;
+    VP56ParseHeader parse_header;
+
+    /* for "slice" parallelism between YUV and A */
+    VP56Context *alpha_context;
+
+    VP56Model *modelp;
+    VP56Model model;
+
+    /* huffman decoding */
+    int use_huffman;
+    GetBitContext gb;
+    VLC dccv_vlc[2];
+    VLC runv_vlc[2];
+    VLC ract_vlc[2][3][6];
+    unsigned int nb_null[2][2];       /* number of consecutive NULL DC/AC */
+};
+
+
+int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha);
+int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
+                          int flip, int has_alpha);
+int ff_vp56_free(AVCodecContext *avctx);
+int ff_vp56_free_context(VP56Context *s);
+void ff_vp56_init_dequant(VP56Context *s, int quantizer);
+int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+                         AVPacket *avpkt);
+
+
+/**
+ * vp56 specific range coder implementation
+ */
+
+extern const uint8_t ff_vp56_norm_shift[256];
+void ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size);
+
+static av_always_inline unsigned int vp56_rac_renorm(VP56RangeCoder *c)
+{
+    int shift = ff_vp56_norm_shift[c->high];
+    int bits = c->bits;
+    unsigned int code_word = c->code_word;
+
+    c->high   <<= shift;
+    code_word <<= shift;
+    bits       += shift;
+    if(bits >= 0 && c->buffer < c->end) {
+        code_word |= bytestream_get_be16(&c->buffer) << bits;
+        bits -= 16;
+    }
+    c->bits = bits;
+    return code_word;
+}
+
+#if   ARCH_ARM
+#include "arm/vp56_arith.h"
+#elif ARCH_X86
+#include "x86/vp56_arith.h"
+#endif
+
+#ifndef vp56_rac_get_prob
+#define vp56_rac_get_prob vp56_rac_get_prob
+static av_always_inline int vp56_rac_get_prob(VP56RangeCoder *c, uint8_t prob)
+{
+    unsigned int code_word = vp56_rac_renorm(c);
+    unsigned int low = 1 + (((c->high - 1) * prob) >> 8);
+    unsigned int low_shift = low << 16;
+    int bit = code_word >= low_shift;
+
+    c->high = bit ? c->high - low : low;
+    c->code_word = bit ? code_word - low_shift : code_word;
+
+    return bit;
+}
+#endif
+
+#ifndef vp56_rac_get_prob_branchy
+// branchy variant, to be used where there's a branch based on the bit decoded
+static av_always_inline int vp56_rac_get_prob_branchy(VP56RangeCoder *c, int prob)
+{
+    unsigned long code_word = vp56_rac_renorm(c);
+    unsigned low = 1 + (((c->high - 1) * prob) >> 8);
+    unsigned low_shift = low << 16;
+
+    if (code_word >= low_shift) {
+        c->high     -= low;
+        c->code_word = code_word - low_shift;
+        return 1;
+    }
+
+    c->high = low;
+    c->code_word = code_word;
+    return 0;
+}
+#endif
+
+static av_always_inline int vp56_rac_get(VP56RangeCoder *c)
+{
+    unsigned int code_word = vp56_rac_renorm(c);
+    /* equiprobable */
+    int low = (c->high + 1) >> 1;
+    unsigned int low_shift = low << 16;
+    int bit = code_word >= low_shift;
+    if (bit) {
+        c->high   -= low;
+        code_word -= low_shift;
+    } else {
+        c->high = low;
+    }
+
+    c->code_word = code_word;
+    return bit;
+}
+
+// rounding is different than vp56_rac_get, is vp56_rac_get wrong?
+static av_always_inline int vp8_rac_get(VP56RangeCoder *c)
+{
+    return vp56_rac_get_prob(c, 128);
+}
+
+static int vp56_rac_gets(VP56RangeCoder *c, int bits)
+{
+    int value = 0;
+
+    while (bits--) {
+        value = (value << 1) | vp56_rac_get(c);
+    }
+
+    return value;
+}
+
+static int vp8_rac_get_uint(VP56RangeCoder *c, int bits)
+{
+    int value = 0;
+
+    while (bits--) {
+        value = (value << 1) | vp8_rac_get(c);
+    }
+
+    return value;
+}
+
+// fixme: add 1 bit to all the calls to this?
+static av_unused int vp8_rac_get_sint(VP56RangeCoder *c, int bits)
+{
+    int v;
+
+    if (!vp8_rac_get(c))
+        return 0;
+
+    v = vp8_rac_get_uint(c, bits);
+
+    if (vp8_rac_get(c))
+        v = -v;
+
+    return v;
+}
+
+// P(7)
+static av_unused int vp56_rac_gets_nn(VP56RangeCoder *c, int bits)
+{
+    int v = vp56_rac_gets(c, 7) << 1;
+    return v + !v;
+}
+
+static av_unused int vp8_rac_get_nn(VP56RangeCoder *c)
+{
+    int v = vp8_rac_get_uint(c, 7) << 1;
+    return v + !v;
+}
+
+static av_always_inline
+int vp56_rac_get_tree(VP56RangeCoder *c,
+                      const VP56Tree *tree,
+                      const uint8_t *probs)
+{
+    while (tree->val > 0) {
+        if (vp56_rac_get_prob_branchy(c, probs[tree->prob_idx]))
+            tree += tree->val;
+        else
+            tree++;
+    }
+    return -tree->val;
+}
+
+// how probabilities are associated with decisions is different I think
+// well, the new scheme fits in the old but this way has one fewer branches per decision
+static av_always_inline int vp8_rac_get_tree(VP56RangeCoder *c, const int8_t (*tree)[2],
+                                   const uint8_t *probs)
+{
+    int i = 0;
+
+    do {
+        i = tree[i][vp56_rac_get_prob(c, probs[i])];
+    } while (i > 0);
+
+    return -i;
+}
+
+// DCTextra
+static av_always_inline int vp8_rac_get_coeff(VP56RangeCoder *c, const uint8_t *prob)
+{
+    int v = 0;
+
+    do {
+        v = (v<<1) + vp56_rac_get_prob(c, *prob++);
+    } while (*prob);
+
+    return v;
+}
+
+#endif /* AVCODEC_VP56_H */