avcodec/dxv: add support for "high" quality mode

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/dxv.c

 /*
  * Resolume DXV decoder
  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
+ * Copyright (C) 2018 Paul B Mahol
  *
  * This file is part of FFmpeg.
  *
@@ -23,6 +24,7 @@
 
 #include "libavutil/imgutils.h"
 
+#include "mathops.h"
 #include "avcodec.h"
 #include "bytestream.h"
 #include "internal.h"
@@ -34,50 +36,211 @@ typedef struct DXVContext {
     TextureDSPContext texdsp;
     GetByteContext gbc;
 
-    uint8_t *tex_data;  // Compressed texture
-    int tex_rat;        // Compression ratio
-    int tex_step;       // Distance between blocks
-    int64_t tex_size;   // Texture size
+    uint8_t *tex_data;   // Compressed texture
+    uint8_t *ctex_data;  // Compressed texture
+    int tex_rat;         // Compression ratio
+    int tex_step;        // Distance between blocks
+    int ctex_step;       // Distance between blocks
+    int64_t tex_size;    // Texture size
+    int64_t ctex_size;   // Texture size
 
     /* Optimal number of slices for parallel decoding */
     int slice_count;
 
+    uint8_t *op_data[4]; // Opcodes
+    int64_t op_size[4];  // Opcodes size
+
+    int texture_block_w;
+    int texture_block_h;
+
+    int ctexture_block_w;
+    int ctexture_block_h;
+
     /* Pointer to the selected decompression function */
     int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
+    int (*tex_funct_planar[2])(uint8_t *plane0, ptrdiff_t stride0,
+                               uint8_t *plane1, ptrdiff_t stride1,
+                               const uint8_t *block);
 } DXVContext;
 
+static void decompress_indices(uint8_t *dst, const uint8_t *src)
+{
+    int block, i;
+
+    for (block = 0; block < 2; block++) {
+        int tmp = AV_RL24(src);
+
+        /* Unpack 8x3 bit from last 3 byte block */
+        for (i = 0; i < 8; i++)
+            dst[i] = (tmp >> (i * 3)) & 0x7;
+
+        src += 3;
+        dst += 8;
+    }
+}
+
+static int extract_component(int yo0, int yo1, int code)
+{
+    int yo;
+
+    if (yo0 == yo1) {
+        yo = yo0;
+    } else if (code == 0) {
+        yo = yo0;
+    } else if (code == 1) {
+        yo = yo1;
+    } else {
+        if (yo0 > yo1) {
+            yo = (uint8_t) (((8 - code) * yo0 +
+                             (code - 1) * yo1) / 7);
+        } else {
+            if (code == 6) {
+                yo = 0;
+            } else if (code == 7) {
+                yo = 255;
+            } else {
+                yo = (uint8_t) (((6 - code) * yo0 +
+                                 (code - 1) * yo1) / 5);
+            }
+        }
+    }
+
+    return yo;
+}
+
+static int cocg_block(uint8_t *plane0, ptrdiff_t stride0,
+                      uint8_t *plane1, ptrdiff_t stride1,
+                      const uint8_t *block)
+{
+    uint8_t co_indices[16];
+    uint8_t cg_indices[16];
+    uint8_t co0 = *(block);
+    uint8_t co1 = *(block + 1);
+    uint8_t cg0 = *(block + 8);
+    uint8_t cg1 = *(block + 9);
+    int x, y;
+
+    decompress_indices(co_indices, block + 2);
+    decompress_indices(cg_indices, block + 10);
+
+    for (y = 0; y < 4; y++) {
+        for (x = 0; x < 4; x++) {
+            int co_code = co_indices[x + y * 4];
+            int cg_code = cg_indices[x + y * 4];
+
+            plane0[x] = extract_component(cg0, cg1, cg_code);
+            plane1[x] = extract_component(co0, co1, co_code);
+        }
+        plane0 += stride0;
+        plane1 += stride1;
+    }
+
+    return 16;
+}
+
+static void yao_subblock(uint8_t *dst, uint8_t *yo_indices,
+                        ptrdiff_t stride, const uint8_t *block)
+{
+    uint8_t yo0 = *(block);
+    uint8_t yo1 = *(block + 1);
+    int x, y;
+
+    decompress_indices(yo_indices, block + 2);
+
+    for (y = 0; y < 4; y++) {
+        for (x = 0; x < 4; x++) {
+            int yo_code = yo_indices[x + y * 4];
+
+            dst[x] = extract_component(yo0, yo1, yo_code);
+        }
+        dst += stride;
+    }
+}
+
+static int yo_block(uint8_t *dst, ptrdiff_t stride,
+                    uint8_t *unused0, ptrdiff_t unused1,
+                    const uint8_t *block)
+{
+    uint8_t yo_indices[16];
+
+    yao_subblock(dst,      yo_indices, stride, block);
+    yao_subblock(dst + 4,  yo_indices, stride, block + 8);
+    yao_subblock(dst + 8,  yo_indices, stride, block + 16);
+    yao_subblock(dst + 12, yo_indices, stride, block + 24);
+
+    return 32;
+}
+
+static int yao_block(uint8_t *plane0, ptrdiff_t stride0,
+                     uint8_t *plane3, ptrdiff_t stride1,
+                     const uint8_t *block)
+{
+    uint8_t yo_indices[16];
+    uint8_t a_indices[16];
+
+    yao_subblock(plane0,      yo_indices, stride0, block);
+    yao_subblock(plane3,      a_indices,  stride1, block + 8);
+    yao_subblock(plane0 + 4,  yo_indices, stride0, block + 16);
+    yao_subblock(plane3 + 4,  a_indices,  stride1, block + 24);
+    yao_subblock(plane0 + 8,  yo_indices, stride0, block + 32);
+    yao_subblock(plane3 + 8,  a_indices,  stride1, block + 40);
+    yao_subblock(plane0 + 12, yo_indices, stride0, block + 48);
+    yao_subblock(plane3 + 12, a_indices,  stride1, block + 56);
+
+    return 64;
+}
+
 static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
                                      int slice, int thread_nb)
 {
     DXVContext *ctx = avctx->priv_data;
     AVFrame *frame = arg;
     const uint8_t *d = ctx->tex_data;
-    int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
-    int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
+    int w_block = avctx->coded_width / ctx->texture_block_w;
+    int h_block = avctx->coded_height / ctx->texture_block_h;
     int x, y;
     int start_slice, end_slice;
-    int base_blocks_per_slice = h_block / ctx->slice_count;
-    int remainder_blocks = h_block % ctx->slice_count;
-
-    /* When the frame height (in blocks) doesn't divide evenly between the
-     * number of slices, spread the remaining blocks evenly between the first
-     * operations */
-    start_slice = slice * base_blocks_per_slice;
-    /* Add any extra blocks (one per slice) that have been added
-     * before this slice */
-    start_slice += FFMIN(slice, remainder_blocks);
-
-    end_slice = start_slice + base_blocks_per_slice;
-    /* Add an extra block if there are remainder blocks to be accounted for */
-    if (slice < remainder_blocks)
-        end_slice++;
-
-    for (y = start_slice; y < end_slice; y++) {
-        uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
-        int off  = y * w_block;
-        for (x = 0; x < w_block; x++) {
-            ctx->tex_funct(p + x * 16, frame->linesize[0],
-                           d + (off + x) * ctx->tex_step);
+
+    start_slice = h_block * slice / ctx->slice_count;
+    end_slice = h_block * (slice + 1) / ctx->slice_count;
+
+    if (ctx->tex_funct) {
+        for (y = start_slice; y < end_slice; y++) {
+            uint8_t *p = frame->data[0] + y * frame->linesize[0] * ctx->texture_block_h;
+            int off = y * w_block;
+            for (x = 0; x < w_block; x++) {
+                ctx->tex_funct(p + x * 4 * ctx->texture_block_w, frame->linesize[0],
+                               d + (off + x) * ctx->tex_step);
+            }
+        }
+    } else {
+        const uint8_t *c = ctx->ctex_data;
+
+        for (y = start_slice; y < end_slice; y++) {
+            uint8_t *p0 = frame->data[0] + y * frame->linesize[0] * ctx->texture_block_h;
+            uint8_t *p3 = ctx->tex_step != 64 ? NULL : frame->data[3] + y * frame->linesize[3] * ctx->texture_block_h;
+            int off = y * w_block;
+            for (x = 0; x < w_block; x++) {
+                ctx->tex_funct_planar[0](p0 + x * ctx->texture_block_w, frame->linesize[0],
+                                         p3 != NULL ? p3 + x * ctx->texture_block_w : NULL, frame->linesize[3],
+                                         d + (off + x) * ctx->tex_step);
+            }
+        }
+
+        w_block = (avctx->coded_width / 2) / ctx->ctexture_block_w;
+        h_block = (avctx->coded_height / 2) / ctx->ctexture_block_h;
+        start_slice = h_block * slice / ctx->slice_count;
+        end_slice = h_block * (slice + 1) / ctx->slice_count;
+
+        for (y = start_slice; y < end_slice; y++) {
+            uint8_t *p0 = frame->data[1] + y * frame->linesize[1] * ctx->ctexture_block_h;
+            uint8_t *p1 = frame->data[2] + y * frame->linesize[2] * ctx->ctexture_block_h;
+            int off = y * w_block;
+            for (x = 0; x < w_block; x++) {
+                ctx->tex_funct_planar[1](p0 + x * ctx->ctexture_block_w, frame->linesize[1],
+                                         p1 + x * ctx->ctexture_block_w, frame->linesize[2],
+                                         c + (off + x) * ctx->ctex_step);
+            }
         }
     }
 
@@ -169,6 +332,529 @@ static int dxv_decompress_dxt1(AVCodecContext *avctx)
     return 0;
 }
 
+typedef struct OpcodeTable {
+    int16_t next;
+    uint8_t val1;
+    uint8_t val2;
+} OpcodeTable;
+
+static int fill_ltable(GetByteContext *gb, uint32_t *table, int *nb_elements)
+{
+    unsigned half = 512, bits = 1023, left = 1024, input, mask;
+    int value, counter = 0, rshift = 10, lshift = 30;
+
+    mask = bytestream2_get_le32(gb) >> 2;
+    while (left) {
+        if (counter >= 256)
+            return AVERROR_INVALIDDATA;
+        value = bits & mask;
+        left -= bits & mask;
+        mask >>= rshift;
+        lshift -= rshift;
+        table[counter++] = value;
+        if (lshift < 16) {
+            if (bytestream2_get_bytes_left(gb) <= 0)
+                return AVERROR_INVALIDDATA;
+
+            input = bytestream2_get_le16(gb);
+            mask += input << lshift;
+            lshift += 16;
+        }
+        if (left < half) {
+            half >>= 1;
+            bits >>= 1;
+            rshift--;
+        }
+    }
+
+    for (; !table[counter - 1]; counter--)
+        if (counter <= 0)
+            return AVERROR_INVALIDDATA;
+
+    *nb_elements = counter;
+
+    if (counter < 256)
+        memset(&table[counter], 0, 4 * (256 - counter));
+
+    if (lshift >= 16)
+        bytestream2_seek(gb, -2, SEEK_CUR);
+
+    return 0;
+}
+
+static int fill_optable(unsigned *table0, OpcodeTable *table1, int nb_elements)
+{
+    unsigned table2[256] = { 0 };
+    unsigned x = 0;
+    int val0, val1, i, j = 2, k = 0;
+
+    table2[0] = table0[0];
+    for (i = 0; i < nb_elements - 1; i++, table2[i] = val0) {
+        val0 = table0[i + 1] + table2[i];
+    }
+
+    if (!table2[0]) {
+        do {
+            k++;
+        } while (!table2[k]);
+    }
+
+    j = 2;
+    for (i = 1024; i > 0; i--) {
+        for (table1[x].val1 = k; k < 256 && j > table2[k]; k++);
+        x = (x - 383) & 0x3FF;
+        j++;
+    }
+
+    if (nb_elements > 0)
+        memcpy(&table2[0], table0, 4 * nb_elements);
+
+    for (i = 0; i < 1024; i++) {
+        val0 = table1[i].val1;
+        val1 = table2[val0];
+        table2[val0]++;
+        x = 31 - ff_clz(val1);
+        if (x > 10)
+            return AVERROR_INVALIDDATA;
+        table1[i].val2 = 10 - x;
+        table1[i].next = (val1 << table1[i].val2) - 1024;
+    }
+
+    return 0;
+}
+
+static int get_opcodes(GetByteContext *gb, uint32_t *table, uint8_t *dst, int op_size, int nb_elements)
+{
+    OpcodeTable optable[1024];
+    int sum, x, val, lshift, rshift, ret, size_in_bits, i, idx;
+    unsigned endoffset, newoffset, offset;
+    unsigned next;
+    uint8_t *src = (uint8_t *)gb->buffer;
+
+    ret = fill_optable(table, optable, nb_elements);
+    if (ret < 0)
+        return ret;
+
+    size_in_bits = bytestream2_get_le32(gb);
+    endoffset = ((size_in_bits + 7) >> 3) - 4;
+    if (endoffset <= 0 || bytestream2_get_bytes_left(gb) < endoffset)
+        return AVERROR_INVALIDDATA;
+
+    offset = endoffset;
+    next = AV_RL32(src + endoffset);
+    rshift = (((size_in_bits & 0xFF) - 1) & 7) + 15;
+    lshift = 32 - rshift;
+    idx = (next >> rshift) & 0x3FF;
+    for (i = 0; i < op_size; i++) {
+        dst[i] = optable[idx].val1;
+        val = optable[idx].val2;
+        sum = val + lshift;
+        x = (next << lshift) >> 1 >> (31 - val);
+        newoffset = offset - (sum >> 3);
+        lshift = sum & 7;
+        idx = x + optable[idx].next;
+        offset = newoffset;
+        if (offset > endoffset)
+            return AVERROR_INVALIDDATA;
+        next = AV_RL32(src + offset);
+    }
+
+    bytestream2_skip(gb, (size_in_bits + 7 >> 3) - 4);
+
+    return 0;
+}
+
+static int dxv_decompress_opcodes(GetByteContext *gb, void *dstp, size_t op_size)
+{
+    int pos = bytestream2_tell(gb);
+    int flag = bytestream2_peek_byte(gb);
+
+    if ((flag & 3) == 0) {
+        bytestream2_skip(gb, 1);
+        bytestream2_get_buffer(gb, dstp, op_size);
+    } else if ((flag & 3) == 1) {
+        bytestream2_skip(gb, 1);
+        memset(dstp, bytestream2_get_byte(gb), op_size);
+    } else {
+        uint32_t table[256];
+        int ret, elements = 0;
+
+        ret = fill_ltable(gb, table, &elements);
+        if (ret < 0)
+            return ret;
+        ret = get_opcodes(gb, table, dstp, op_size, elements);
+        if (ret < 0)
+            return ret;
+    }
+    return bytestream2_tell(gb) - pos;
+}
+
+static int dxv_decompress_cgo(DXVContext *ctx, GetByteContext *gb,
+                              uint8_t *tex_data, int tex_size,
+                              uint8_t *op_data, int *oindex,
+                              int op_size,
+                              uint8_t **dstp, int *statep,
+                              uint8_t **tab0, uint8_t **tab1,
+                              int offset)
+{
+    uint8_t *dst = *dstp;
+    uint8_t *tptr0, *tptr1, *tptr3;
+    int oi = *oindex;
+    int state = *statep;
+    int opcode, v, vv;
+
+    if (state <= 0) {
+        if (oi >= op_size)
+            return AVERROR_INVALIDDATA;
+        opcode = op_data[oi++];
+        if (!opcode) {
+            v = bytestream2_get_byte(gb);
+            if (v == 255) {
+                do {
+                    if (bytestream2_get_bytes_left(gb) <= 0)
+                        return AVERROR_INVALIDDATA;
+                    opcode = bytestream2_get_le16(gb);
+                    v += opcode;
+                } while (opcode == 0xFFFF);
+            }
+            AV_WL32(dst, AV_RL32(dst - (8 + offset)));
+            AV_WL32(dst + 4, AV_RL32(dst - (4 + offset)));
+            state = v + 4;
+            goto done;
+        }
+
+        switch (opcode) {
+        case 1:
+            AV_WL32(dst, AV_RL32(dst - (8 + offset)));
+            AV_WL32(dst + 4, AV_RL32(dst - (4 + offset)));
+            break;
+        case 2:
+            vv = (8 + offset) * (bytestream2_get_le16(gb) + 1);
+            if (vv < 0 || vv > dst - tex_data)
+                return AVERROR_INVALIDDATA;
+            tptr0 = dst - vv;
+            v = AV_RL32(tptr0);
+            AV_WL32(dst, AV_RL32(tptr0));
+            AV_WL32(dst + 4, AV_RL32(tptr0 + 4));
+            tab0[0x9E3779B1 * (uint16_t)v >> 24] = dst;
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 3:
+            AV_WL32(dst, bytestream2_get_le32(gb));
+            AV_WL32(dst + 4, bytestream2_get_le32(gb));
+            tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst;
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 4:
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, bytestream2_get_le16(gb));
+            AV_WL16(dst + 2, AV_RL16(tptr3));
+            dst[4] = tptr3[2];
+            AV_WL16(dst + 5, bytestream2_get_le16(gb));
+            dst[7] = bytestream2_get_byte(gb);
+            tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst;
+            break;
+        case 5:
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, bytestream2_get_le16(gb));
+            AV_WL16(dst + 2, bytestream2_get_le16(gb));
+            dst[4] = bytestream2_get_byte(gb);
+            AV_WL16(dst + 5, AV_RL16(tptr3));
+            dst[7] = tptr3[2];
+            tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst;
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 6:
+            tptr0 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr0)
+                return AVERROR_INVALIDDATA;
+            tptr1 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, bytestream2_get_le16(gb));
+            AV_WL16(dst + 2, AV_RL16(tptr0));
+            dst[4] = tptr0[2];
+            AV_WL16(dst + 5, AV_RL16(tptr1));
+            dst[7] = tptr1[2];
+            tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst;
+            break;
+        case 7:
+            v = (8 + offset) * (bytestream2_get_le16(gb) + 1);
+            if (v < 0 || v > dst - tex_data)
+                return AVERROR_INVALIDDATA;
+            tptr0 = dst - v;
+            AV_WL16(dst, bytestream2_get_le16(gb));
+            AV_WL16(dst + 2, AV_RL16(tptr0 + 2));
+            AV_WL32(dst + 4, AV_RL32(tptr0 + 4));
+            tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst;
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 8:
+            tptr1 = tab0[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(tptr1));
+            AV_WL16(dst + 2, bytestream2_get_le16(gb));
+            AV_WL32(dst + 4, bytestream2_get_le32(gb));
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 9:
+            tptr1 = tab0[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(tptr1));
+            AV_WL16(dst + 2, AV_RL16(tptr3));
+            dst[4] = tptr3[2];
+            AV_WL16(dst + 5, bytestream2_get_le16(gb));
+            dst[7] = bytestream2_get_byte(gb);
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 10:
+            tptr1 = tab0[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(tptr1));
+            AV_WL16(dst + 2, bytestream2_get_le16(gb));
+            dst[4] = bytestream2_get_byte(gb);
+            AV_WL16(dst + 5, AV_RL16(tptr3));
+            dst[7] = tptr3[2];
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 11:
+            tptr0 = tab0[bytestream2_get_byte(gb)];
+            if (!tptr0)
+                return AVERROR_INVALIDDATA;
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            tptr1 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(tptr0));
+            AV_WL16(dst + 2, AV_RL16(tptr3));
+            dst[4] = tptr3[2];
+            AV_WL16(dst + 5, AV_RL16(tptr1));
+            dst[7] = tptr1[2];
+            break;
+        case 12:
+            tptr1 = tab0[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            v = (8 + offset) * (bytestream2_get_le16(gb) + 1);
+            if (v < 0 || v > dst - tex_data)
+                return AVERROR_INVALIDDATA;
+            tptr0 = dst - v;
+            AV_WL16(dst, AV_RL16(tptr1));
+            AV_WL16(dst + 2, AV_RL16(tptr0 + 2));
+            AV_WL32(dst + 4, AV_RL32(tptr0 + 4));
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 13:
+            AV_WL16(dst, AV_RL16(dst - (8 + offset)));
+            AV_WL16(dst + 2, bytestream2_get_le16(gb));
+            AV_WL32(dst + 4, bytestream2_get_le32(gb));
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 14:
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(dst - (8 + offset)));
+            AV_WL16(dst + 2, AV_RL16(tptr3));
+            dst[4] = tptr3[2];
+            AV_WL16(dst + 5, bytestream2_get_le16(gb));
+            dst[7] = bytestream2_get_byte(gb);
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 15:
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(dst - (8 + offset)));
+            AV_WL16(dst + 2, bytestream2_get_le16(gb));
+            dst[4] = bytestream2_get_byte(gb);
+            AV_WL16(dst + 5, AV_RL16(tptr3));
+            dst[7] = tptr3[2];
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        case 16:
+            tptr3 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr3)
+                return AVERROR_INVALIDDATA;
+            tptr1 = tab1[bytestream2_get_byte(gb)];
+            if (!tptr1)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(dst - (8 + offset)));
+            AV_WL16(dst + 2, AV_RL16(tptr3));
+            dst[4] = tptr3[2];
+            AV_WL16(dst + 5, AV_RL16(tptr1));
+            dst[7] = tptr1[2];
+            break;
+        case 17:
+            v = (8 + offset) * (bytestream2_get_le16(gb) + 1);
+            if (v < 0 || v > dst - tex_data)
+                return AVERROR_INVALIDDATA;
+            AV_WL16(dst, AV_RL16(dst - (8 + offset)));
+            AV_WL16(dst + 2, AV_RL16(&dst[-v + 2]));
+            AV_WL32(dst + 4, AV_RL32(&dst[-v + 4]));
+            tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2;
+            break;
+        default:
+            break;
+        }
+    } else {
+done:
+        AV_WL32(dst, AV_RL32(dst - (8 + offset)));
+        AV_WL32(dst + 4, AV_RL32(dst - (4 + offset)));
+        state--;
+    }
+    if (dst - tex_data + 8 > tex_size)
+        return AVERROR_INVALIDDATA;
+    dst += 8;
+
+    *oindex = oi;
+    *dstp = dst;
+    *statep = state;
+
+    return 0;
+}
+
+static int dxv_decompress_cocg(DXVContext *ctx, GetByteContext *gb,
+                               uint8_t *tex_data, int tex_size,
+                               uint8_t *op_data0, uint8_t *op_data1,
+                               int max_op_size0, int max_op_size1)
+{
+    uint8_t *dst, *tab2[256] = { 0 }, *tab0[256] = { 0 }, *tab3[256] = { 0 }, *tab1[256] = { 0 };
+    int op_offset = bytestream2_get_le32(gb);
+    unsigned op_size0 = bytestream2_get_le32(gb);
+    unsigned op_size1 = bytestream2_get_le32(gb);
+    int data_start = bytestream2_tell(gb);
+    int skip0, skip1, oi0 = 0, oi1 = 0;
+    int ret, state0 = 0, state1 = 0;
+
+    dst = tex_data;
+    bytestream2_skip(gb, op_offset - 12);
+    if (op_size0 > max_op_size0)
+        return AVERROR_INVALIDDATA;
+    skip0 = dxv_decompress_opcodes(gb, op_data0, op_size0);
+    if (skip0 < 0)
+        return skip0;
+    bytestream2_seek(gb, data_start + op_offset + skip0 - 12, SEEK_SET);
+    if (op_size1 > max_op_size1)
+        return AVERROR_INVALIDDATA;
+    skip1 = dxv_decompress_opcodes(gb, op_data1, op_size1);
+    if (skip1 < 0)
+        return skip1;
+    bytestream2_seek(gb, data_start, SEEK_SET);
+
+    AV_WL32(dst, bytestream2_get_le32(gb));
+    AV_WL32(dst + 4, bytestream2_get_le32(gb));
+    AV_WL32(dst + 8, bytestream2_get_le32(gb));
+    AV_WL32(dst + 12, bytestream2_get_le32(gb));
+
+    tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst;
+    tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFF) >> 24] = dst + 2;
+    tab2[0x9E3779B1 * AV_RL16(dst + 8) >> 24] = dst + 8;
+    tab3[0x9E3779B1 * (AV_RL32(dst + 10) & 0xFFFFFF) >> 24] = dst + 10;
+    dst += 16;
+    while (dst + 10 < tex_data + tex_size) {
+        ret = dxv_decompress_cgo(ctx, gb, tex_data, tex_size, op_data0, &oi0, op_size0,
+                                 &dst, &state0, tab0, tab1, 8);
+        if (ret < 0)
+            return ret;
+        ret = dxv_decompress_cgo(ctx, gb, tex_data, tex_size, op_data1, &oi1, op_size1,
+                                 &dst, &state1, tab2, tab3, 8);
+        if (ret < 0)
+            return ret;
+    }
+
+    bytestream2_seek(gb, data_start + op_offset + skip0 + skip1 - 12, SEEK_SET);
+
+    return 0;
+}
+
+static int dxv_decompress_yo(DXVContext *ctx, GetByteContext *gb,
+                             uint8_t *tex_data, int tex_size,
+                             uint8_t *op_data, int max_op_size)
+{
+    int op_offset = bytestream2_get_le32(gb);
+    unsigned op_size = bytestream2_get_le32(gb);
+    int data_start = bytestream2_tell(gb);
+    uint8_t *dst, *table0[256] = { 0 }, *table1[256] = { 0 };
+    int ret, state = 0, skip, oi = 0, v, vv;
+
+    dst = tex_data;
+    bytestream2_skip(gb, op_offset - 8);
+    if (op_size > max_op_size)
+        return AVERROR_INVALIDDATA;
+    skip = dxv_decompress_opcodes(gb, op_data, op_size);
+    if (skip < 0)
+        return skip;
+    bytestream2_seek(gb, data_start, SEEK_SET);
+
+    v = bytestream2_get_le32(gb);
+    AV_WL32(dst, v);
+    vv = bytestream2_get_le32(gb);
+    table0[0x9E3779B1 * (uint16_t)v >> 24] = dst;
+    AV_WL32(dst + 4, vv);
+    table1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFF) >> 24] = dst + 2;
+    dst += 8;
+
+    while (dst < tex_data + tex_size) {
+        ret = dxv_decompress_cgo(ctx, gb, tex_data, tex_size, op_data, &oi, op_size,
+                                 &dst, &state, table0, table1, 0);
+        if (ret < 0)
+            return ret;
+    }
+
+    bytestream2_seek(gb, data_start + op_offset + skip - 8, SEEK_SET);
+
+    return 0;
+}
+
+static int dxv_decompress_ycg6(AVCodecContext *avctx)
+{
+    DXVContext *ctx = avctx->priv_data;
+    GetByteContext *gb = &ctx->gbc;
+    int ret;
+
+    ret = dxv_decompress_yo(ctx, gb, ctx->tex_data, ctx->tex_size,
+                            ctx->op_data[0], ctx->op_size[0]);
+    if (ret < 0)
+        return ret;
+
+    return dxv_decompress_cocg(ctx, gb, ctx->ctex_data, ctx->ctex_size,
+                               ctx->op_data[1], ctx->op_data[2],
+                               ctx->op_size[1], ctx->op_size[2]);
+}
+
+static int dxv_decompress_yg10(AVCodecContext *avctx)
+{
+    DXVContext *ctx = avctx->priv_data;
+    GetByteContext *gb = &ctx->gbc;
+    int ret;
+
+    ret = dxv_decompress_cocg(ctx, gb, ctx->tex_data, ctx->tex_size,
+                              ctx->op_data[0], ctx->op_data[3],
+                              ctx->op_size[0], ctx->op_size[3]);
+    if (ret < 0)
+        return ret;
+
+    return dxv_decompress_cocg(ctx, gb, ctx->ctex_data, ctx->ctex_size,
+                               ctx->op_data[1], ctx->op_data[2],
+                               ctx->op_size[1], ctx->op_size[2]);
+}
+
 static int dxv_decompress_dxt5(AVCodecContext *avctx)
 {
     DXVContext *ctx = avctx->priv_data;
@@ -359,6 +1045,12 @@ static int dxv_decode(AVCodecContext *avctx, void *data,
 
     bytestream2_init(gbc, avpkt->data, avpkt->size);
 
+    ctx->texture_block_h = 4;
+    ctx->texture_block_w = 4;
+
+    avctx->pix_fmt = AV_PIX_FMT_RGBA;
+    avctx->colorspace = AVCOL_SPC_RGB;
+
     tag = bytestream2_get_le32(gbc);
     switch (tag) {
     case MKBETAG('D', 'X', 'T', '1'):
@@ -378,9 +1070,39 @@ static int dxv_decode(AVCodecContext *avctx, void *data,
         msgtext = "DXT5";
         break;
     case MKBETAG('Y', 'C', 'G', '6'):
+        decompress_tex = dxv_decompress_ycg6;
+        ctx->tex_funct_planar[0] = yo_block;
+        ctx->tex_funct_planar[1] = cocg_block;
+        ctx->tex_rat   = 8;
+        ctx->tex_step  = 32;
+        ctx->ctex_step = 16;
+        msgcomp = "YOCOCG6";
+        msgtext = "YCG6";
+        ctx->ctex_size = avctx->coded_width * avctx->coded_height / 4;
+        ctx->texture_block_h = 4;
+        ctx->texture_block_w = 16;
+        ctx->ctexture_block_h = 4;
+        ctx->ctexture_block_w = 4;
+        avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+        avctx->colorspace = AVCOL_SPC_YCOCG;
+        break;
     case MKBETAG('Y', 'G', '1', '0'):
-        avpriv_report_missing_feature(avctx, "Tag 0x%08"PRIX32, tag);
-        return AVERROR_PATCHWELCOME;
+        decompress_tex = dxv_decompress_yg10;
+        ctx->tex_funct_planar[0] = yao_block;
+        ctx->tex_funct_planar[1] = cocg_block;
+        ctx->tex_rat   = 4;
+        ctx->tex_step  = 64;
+        ctx->ctex_step = 16;
+        msgcomp = "YAOCOCG10";
+        msgtext = "YG10";
+        ctx->ctex_size = avctx->coded_width * avctx->coded_height / 4;
+        ctx->texture_block_h = 4;
+        ctx->texture_block_w = 16;
+        ctx->ctexture_block_h = 4;
+        ctx->ctexture_block_w = 4;
+        avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
+        avctx->colorspace = AVCOL_SPC_YCOCG;
+        break;
     default:
         /* Old version does not have a real header, just size and type. */
         size = tag & 0x00FFFFFF;
@@ -413,6 +1135,10 @@ static int dxv_decode(AVCodecContext *avctx, void *data,
         break;
     }
 
+    ctx->slice_count = av_clip(avctx->thread_count, 1,
+                               avctx->coded_height / FFMAX(ctx->texture_block_h,
+                                                           ctx->ctexture_block_h));
+
     /* New header is 12 bytes long. */
     if (!old_type) {
         version_major = bytestream2_get_byte(gbc) - 1;
@@ -440,10 +1166,28 @@ static int dxv_decode(AVCodecContext *avctx, void *data,
     }
 
     ctx->tex_size = avctx->coded_width * avctx->coded_height * 4 / ctx->tex_rat;
-    ret = av_reallocp(&ctx->tex_data, ctx->tex_size);
+    ret = av_reallocp(&ctx->tex_data, ctx->tex_size + AV_INPUT_BUFFER_PADDING_SIZE);
     if (ret < 0)
         return ret;
 
+    if (ctx->ctex_size) {
+        int i;
+
+        ctx->op_size[0] = avctx->coded_width * avctx->coded_height / 16;
+        ctx->op_size[1] = avctx->coded_width * avctx->coded_height / 32;
+        ctx->op_size[2] = avctx->coded_width * avctx->coded_height / 32;
+        ctx->op_size[3] = avctx->coded_width * avctx->coded_height / 16;
+
+        ret = av_reallocp(&ctx->ctex_data, ctx->ctex_size + AV_INPUT_BUFFER_PADDING_SIZE);
+        if (ret < 0)
+            return ret;
+        for (i = 0; i < 4; i++) {
+            ret = av_reallocp(&ctx->op_data[i], ctx->op_size[i]);
+            if (ret < 0)
+                return ret;
+        }
+    }
+
     /* Decompress texture out of the intermediate compression. */
     ret = decompress_tex(avctx);
     if (ret < 0)
@@ -482,10 +1226,6 @@ static int dxv_init(AVCodecContext *avctx)
     avctx->coded_height = FFALIGN(avctx->height, 16);
 
     ff_texturedsp_init(&ctx->texdsp);
-    avctx->pix_fmt = AV_PIX_FMT_RGBA;
-
-    ctx->slice_count = av_clip(avctx->thread_count, 1,
-                               avctx->coded_height / TEXTURE_BLOCK_H);
 
     return 0;
 }
@@ -495,6 +1235,11 @@ static int dxv_close(AVCodecContext *avctx)
     DXVContext *ctx = avctx->priv_data;
 
     av_freep(&ctx->tex_data);
+    av_freep(&ctx->ctex_data);
+    av_freep(&ctx->op_data[0]);
+    av_freep(&ctx->op_data[1]);
+    av_freep(&ctx->op_data[2]);
+    av_freep(&ctx->op_data[3]);
 
     return 0;
 }