making act segmenter

1 files changed, 0 insertions, 1300 deletions

diff --git a/ffmpeg1/libavcodec/sanm.c b/ffmpeg1/libavcodec/sanm.c
deleted file mode 100644
index f217ef3..0000000
--- a/ffmpeg1/libavcodec/sanm.c
+++ /dev/null
@@ -1,1300 +0,0 @@
-/*
- * LucasArts Smush video decoder
- * Copyright (c) 2006 Cyril Zorin
- * Copyright (c) 2011 Konstantin Shishkov
- *
- * 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
- */
-
-// #define DEBUG 1
-
-#include "avcodec.h"
-#include "copy_block.h"
-#include "bytestream.h"
-#include "internal.h"
-#include "libavutil/bswap.h"
-#include "libavutil/imgutils.h"
-#include "sanm_data.h"
-#include "libavutil/avassert.h"
-
-#define NGLYPHS 256
-
-typedef struct {
-    AVCodecContext *avctx;
-    GetByteContext gb;
-
-    int version, subversion;
-    uint32_t pal[256];
-    int16_t delta_pal[768];
-
-    int pitch;
-    int width, height;
-    int aligned_width, aligned_height;
-    int prev_seq;
-
-    AVFrame *frame;
-    uint16_t *frm0, *frm1, *frm2;
-    uint8_t *stored_frame;
-    uint32_t frm0_size, frm1_size, frm2_size;
-    uint32_t stored_frame_size;
-
-    uint8_t *rle_buf;
-    unsigned int rle_buf_size;
-
-    int rotate_code;
-
-    long npixels, buf_size;
-
-    uint16_t codebook[256];
-    uint16_t small_codebook[4];
-
-    int8_t p4x4glyphs[NGLYPHS][16];
-    int8_t p8x8glyphs[NGLYPHS][64];
-} SANMVideoContext;
-
-typedef struct {
-    int seq_num, codec, rotate_code, rle_output_size;
-
-    uint16_t bg_color;
-    uint32_t width, height;
-} SANMFrameHeader;
-
-enum GlyphEdge {
-    LEFT_EDGE,
-    TOP_EDGE,
-    RIGHT_EDGE,
-    BOTTOM_EDGE,
-    NO_EDGE
-};
-
-enum GlyphDir {
-    DIR_LEFT,
-    DIR_UP,
-    DIR_RIGHT,
-    DIR_DOWN,
-    NO_DIR
-};
-
-/**
- * Return enum GlyphEdge of box where point (x, y) lies.
- *
- * @param x x point coordinate
- * @param y y point coordinate
- * @param edge_size box width/height.
- */
-static enum GlyphEdge which_edge(int x, int y, int edge_size)
-{
-    const int edge_max = edge_size - 1;
-
-    if (!y) {
-        return BOTTOM_EDGE;
-    } else if (y == edge_max) {
-        return TOP_EDGE;
-    } else if (!x) {
-        return LEFT_EDGE;
-    } else if (x == edge_max) {
-        return RIGHT_EDGE;
-    } else {
-        return NO_EDGE;
-    }
-}
-
-static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
-{
-    if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) ||
-        (edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) ||
-        (edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) ||
-        (edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE)) {
-        return DIR_UP;
-    } else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) ||
-               (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE)) {
-        return DIR_DOWN;
-    } else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) ||
-               (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE)) {
-        return DIR_LEFT;
-    } else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) ||
-               (edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) ||
-               (edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) ||
-               (edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE)) {
-        return DIR_RIGHT;
-    }
-
-    return NO_DIR;
-}
-
-/**
- * Interpolate two points.
- */
-static void interp_point(int8_t *points, int x0, int y0, int x1, int y1,
-                         int pos, int npoints)
-{
-    if (npoints) {
-        points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints;
-        points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints;
-    } else {
-        points[0] = x0;
-        points[1] = y0;
-    }
-}
-
-/**
- * Construct glyphs by iterating through vectors coordinates.
- *
- * @param pglyphs pointer to table where glyphs are stored
- * @param xvec pointer to x component of vectors coordinates
- * @param yvec pointer to y component of vectors coordinates
- * @param side_length glyph width/height.
- */
-static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec,
-                        const int side_length)
-{
-    const int glyph_size = side_length * side_length;
-    int8_t *pglyph = pglyphs;
-
-    int i, j;
-    for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) {
-        int x0    = xvec[i];
-        int y0    = yvec[i];
-        enum GlyphEdge edge0 = which_edge(x0, y0, side_length);
-
-        for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) {
-            int x1      = xvec[j];
-            int y1      = yvec[j];
-            enum GlyphEdge edge1   = which_edge(x1, y1, side_length);
-            enum GlyphDir  dir     = which_direction(edge0, edge1);
-            int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0));
-            int ipoint;
-
-            for (ipoint = 0; ipoint <= npoints; ipoint++) {
-                int8_t point[2];
-                int irow, icol;
-
-                interp_point(point, x0, y0, x1, y1, ipoint, npoints);
-
-                switch (dir) {
-                case DIR_UP:
-                    for (irow = point[1]; irow >= 0; irow--)
-                        pglyph[point[0] + irow * side_length] = 1;
-                    break;
-
-                case DIR_DOWN:
-                    for (irow = point[1]; irow < side_length; irow++)
-                        pglyph[point[0] + irow * side_length] = 1;
-                    break;
-
-                case DIR_LEFT:
-                    for (icol = point[0]; icol >= 0; icol--)
-                        pglyph[icol + point[1] * side_length] = 1;
-                    break;
-
-                case DIR_RIGHT:
-                    for (icol = point[0]; icol < side_length; icol++)
-                        pglyph[icol + point[1] * side_length] = 1;
-                    break;
-                }
-            }
-        }
-    }
-}
-
-static void init_sizes(SANMVideoContext *ctx, int width, int height)
-{
-    ctx->width   = width;
-    ctx->height  = height;
-    ctx->npixels = width * height;
-
-    ctx->aligned_width  = FFALIGN(width,  8);
-    ctx->aligned_height = FFALIGN(height, 8);
-
-    ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]);
-    ctx->pitch    = width;
-}
-
-static void destroy_buffers(SANMVideoContext *ctx)
-{
-    av_freep(&ctx->frm0);
-    av_freep(&ctx->frm1);
-    av_freep(&ctx->frm2);
-    av_freep(&ctx->stored_frame);
-    av_freep(&ctx->rle_buf);
-    ctx->frm0_size =
-    ctx->frm1_size =
-    ctx->frm2_size = 0;
-}
-
-static av_cold int init_buffers(SANMVideoContext *ctx)
-{
-    av_fast_padded_malloc(&ctx->frm0, &ctx->frm0_size, ctx->buf_size);
-    av_fast_padded_malloc(&ctx->frm1, &ctx->frm1_size, ctx->buf_size);
-    av_fast_padded_malloc(&ctx->frm2, &ctx->frm2_size, ctx->buf_size);
-    if (!ctx->version)
-        av_fast_padded_malloc(&ctx->stored_frame, &ctx->stored_frame_size, ctx->buf_size);
-
-    if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || (!ctx->stored_frame && !ctx->version)) {
-        destroy_buffers(ctx);
-        return AVERROR(ENOMEM);
-    }
-
-    return 0;
-}
-
-static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
-{
-    av_dlog(ctx->avctx, "rotate %d\n", rotate_code);
-    if (rotate_code == 2)
-        FFSWAP(uint16_t*, ctx->frm1, ctx->frm2);
-    FFSWAP(uint16_t*, ctx->frm2, ctx->frm0);
-}
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
-    SANMVideoContext *ctx = avctx->priv_data;
-
-    ctx->avctx     = avctx;
-    ctx->version   = !avctx->extradata_size;
-
-    avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8;
-
-    init_sizes(ctx, avctx->width, avctx->height);
-    if (init_buffers(ctx)) {
-        av_log(avctx, AV_LOG_ERROR, "error allocating buffers\n");
-        return AVERROR(ENOMEM);
-    }
-
-    make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4);
-    make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8);
-
-    if (!ctx->version) {
-        int i;
-
-        if (avctx->extradata_size < 1026) {
-            av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        ctx->subversion = AV_RL16(avctx->extradata);
-        for (i = 0; i < 256; i++)
-            ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4);
-    }
-
-    return 0;
-}
-
-static av_cold int decode_end(AVCodecContext *avctx)
-{
-    SANMVideoContext *ctx = avctx->priv_data;
-
-    destroy_buffers(ctx);
-
-    return 0;
-}
-
-static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size)
-{
-    int opcode, color, run_len, left = out_size;
-
-    while (left > 0) {
-        opcode = bytestream2_get_byte(&ctx->gb);
-        run_len = (opcode >> 1) + 1;
-        if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0)
-            return AVERROR_INVALIDDATA;
-
-        if (opcode & 1) {
-            color = bytestream2_get_byte(&ctx->gb);
-            memset(dst, color, run_len);
-        } else {
-            if (bytestream2_get_bytes_left(&ctx->gb) < run_len)
-                return AVERROR_INVALIDDATA;
-            bytestream2_get_bufferu(&ctx->gb, dst, run_len);
-        }
-
-        dst  += run_len;
-        left -= run_len;
-    }
-
-    return 0;
-}
-
-static int old_codec1(SANMVideoContext *ctx, int top,
-                      int left, int width, int height)
-{
-    uint8_t *dst = ((uint8_t*)ctx->frm0) + left + top * ctx->pitch;
-    int i, j, len, flag, code, val, pos, end;
-
-    for (i = 0; i < height; i++) {
-        pos = 0;
-
-        if (bytestream2_get_bytes_left(&ctx->gb) < 2)
-            return AVERROR_INVALIDDATA;
-
-        len = bytestream2_get_le16u(&ctx->gb);
-        end = bytestream2_tell(&ctx->gb) + len;
-
-        while (bytestream2_tell(&ctx->gb) < end) {
-            if (bytestream2_get_bytes_left(&ctx->gb) < 2)
-                return AVERROR_INVALIDDATA;
-
-            code = bytestream2_get_byteu(&ctx->gb);
-            flag = code & 1;
-            code = (code >> 1) + 1;
-            if (pos + code > width)
-                return AVERROR_INVALIDDATA;
-            if (flag) {
-                val = bytestream2_get_byteu(&ctx->gb);
-                if (val)
-                    memset(dst + pos, val, code);
-                pos += code;
-            } else {
-                if (bytestream2_get_bytes_left(&ctx->gb) < code)
-                    return AVERROR_INVALIDDATA;
-                for (j = 0; j < code; j++) {
-                    val = bytestream2_get_byteu(&ctx->gb);
-                    if (val)
-                        dst[pos] = val;
-                    pos++;
-                }
-            }
-        }
-        dst += ctx->pitch;
-    }
-    ctx->rotate_code = 0;
-
-    return 0;
-}
-
-static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
-                              int height, int stride, int x, int y)
-{
-    int pos, i, j;
-
-    pos = x + y * stride;
-    for (j = 0; j < 4; j++) {
-        for (i = 0; i < 4; i++) {
-            if ((pos + i) < 0 || (pos + i) >= height * stride)
-                dst[i] = 0;
-            else
-                dst[i] = src[i];
-        }
-        dst += stride;
-        src += stride;
-        pos += stride;
-    }
-}
-
-static int old_codec37(SANMVideoContext *ctx, int top,
-                       int left, int width, int height)
-{
-    int stride = ctx->pitch;
-    int i, j, k, t;
-    int skip_run = 0;
-    int compr, mvoff, seq, flags;
-    uint32_t decoded_size;
-    uint8_t *dst, *prev;
-
-    compr        = bytestream2_get_byte(&ctx->gb);
-    mvoff        = bytestream2_get_byte(&ctx->gb);
-    seq          = bytestream2_get_le16(&ctx->gb);
-    decoded_size = bytestream2_get_le32(&ctx->gb);
-    bytestream2_skip(&ctx->gb, 4);
-    flags        = bytestream2_get_byte(&ctx->gb);
-    bytestream2_skip(&ctx->gb, 3);
-
-    if (decoded_size > ctx->height * stride - left - top * stride) {
-        decoded_size = ctx->height * stride - left - top * stride;
-        av_log(ctx->avctx, AV_LOG_WARNING, "decoded size is too large\n");
-    }
-
-    ctx->rotate_code = 0;
-
-    if (((seq & 1) || !(flags & 1)) && (compr && compr != 2))
-        rotate_bufs(ctx, 1);
-
-    dst  = ((uint8_t*)ctx->frm0) + left + top * stride;
-    prev = ((uint8_t*)ctx->frm2) + left + top * stride;
-
-    if (mvoff > 2) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "invalid motion base value %d\n", mvoff);
-        return AVERROR_INVALIDDATA;
-    }
-    av_dlog(ctx->avctx, "compression %d\n", compr);
-    switch (compr) {
-    case 0:
-        for (i = 0; i < height; i++) {
-            bytestream2_get_buffer(&ctx->gb, dst, width);
-            dst += stride;
-        }
-        memset(ctx->frm1, 0, ctx->height * stride);
-        memset(ctx->frm2, 0, ctx->height * stride);
-        break;
-    case 2:
-        if (rle_decode(ctx, dst, decoded_size))
-            return AVERROR_INVALIDDATA;
-        memset(ctx->frm1, 0, ctx->frm1_size);
-        memset(ctx->frm2, 0, ctx->frm2_size);
-        break;
-    case 3:
-    case 4:
-        if (flags & 4) {
-            for (j = 0; j < height; j += 4) {
-                for (i = 0; i < width; i += 4) {
-                    int code;
-                    if (skip_run) {
-                        skip_run--;
-                        copy_block4(dst + i, prev + i, stride, stride, 4);
-                        continue;
-                    }
-                    if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-                        return AVERROR_INVALIDDATA;
-                    code = bytestream2_get_byteu(&ctx->gb);
-                    switch (code) {
-                    case 0xFF:
-                        if (bytestream2_get_bytes_left(&ctx->gb) < 16)
-                            return AVERROR_INVALIDDATA;
-                        for (k = 0; k < 4; k++)
-                            bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
-                        break;
-                    case 0xFE:
-                        if (bytestream2_get_bytes_left(&ctx->gb) < 4)
-                            return AVERROR_INVALIDDATA;
-                        for (k = 0; k < 4; k++)
-                            memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4);
-                        break;
-                    case 0xFD:
-                        if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-                            return AVERROR_INVALIDDATA;
-                        t = bytestream2_get_byteu(&ctx->gb);
-                        for (k = 0; k < 4; k++)
-                            memset(dst + i + k * stride, t, 4);
-                        break;
-                    default:
-                        if (compr == 4 && !code) {
-                            if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-                                return AVERROR_INVALIDDATA;
-                            skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
-                            i -= 4;
-                        } else {
-                            int mx, my;
-
-                            mx = c37_mv[(mvoff * 255 + code) * 2    ];
-                            my = c37_mv[(mvoff * 255 + code) * 2 + 1];
-                            codec37_mv(dst + i, prev + i + mx + my * stride,
-                                       ctx->height, stride, i + mx, j + my);
-                        }
-                    }
-                }
-                dst  += stride * 4;
-                prev += stride * 4;
-            }
-        } else {
-            for (j = 0; j < height; j += 4) {
-                for (i = 0; i < width; i += 4) {
-                    int code;
-                    if (skip_run) {
-                        skip_run--;
-                        copy_block4(dst + i, prev + i, stride, stride, 4);
-                        continue;
-                    }
-                    code = bytestream2_get_byte(&ctx->gb);
-                    if (code == 0xFF) {
-                        if (bytestream2_get_bytes_left(&ctx->gb) < 16)
-                            return AVERROR_INVALIDDATA;
-                        for (k = 0; k < 4; k++)
-                            bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
-                    } else if (compr == 4 && !code) {
-                        if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-                            return AVERROR_INVALIDDATA;
-                        skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
-                        i -= 4;
-                    } else {
-                        int mx, my;
-
-                        mx = c37_mv[(mvoff * 255 + code) * 2];
-                        my = c37_mv[(mvoff * 255 + code) * 2 + 1];
-                        codec37_mv(dst + i, prev + i + mx + my * stride,
-                                   ctx->height, stride, i + mx, j + my);
-                    }
-                }
-                dst  += stride * 4;
-                prev += stride * 4;
-            }
-        }
-        break;
-    default:
-        av_log(ctx->avctx, AV_LOG_ERROR,
-               "subcodec 37 compression %d not implemented\n", compr);
-        return AVERROR_PATCHWELCOME;
-    }
-
-    return 0;
-}
-
-static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1,
-                         uint8_t *prev2, int stride, int tbl, int size)
-{
-    int code, k, t;
-    uint8_t colors[2];
-    int8_t *pglyph;
-
-    if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-        return AVERROR_INVALIDDATA;
-
-    code = bytestream2_get_byteu(&ctx->gb);
-    if (code >= 0xF8) {
-        switch (code) {
-        case 0xFF:
-            if (size == 2) {
-                if (bytestream2_get_bytes_left(&ctx->gb) < 4)
-                    return AVERROR_INVALIDDATA;
-                dst[0]        = bytestream2_get_byteu(&ctx->gb);
-                dst[1]        = bytestream2_get_byteu(&ctx->gb);
-                dst[0+stride] = bytestream2_get_byteu(&ctx->gb);
-                dst[1+stride] = bytestream2_get_byteu(&ctx->gb);
-            } else {
-                size >>= 1;
-                if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
-                    return AVERROR_INVALIDDATA;
-                if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
-                                  stride, tbl, size))
-                    return AVERROR_INVALIDDATA;
-                dst   += size * stride;
-                prev1 += size * stride;
-                prev2 += size * stride;
-                if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
-                    return AVERROR_INVALIDDATA;
-                if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
-                                  stride, tbl, size))
-                    return AVERROR_INVALIDDATA;
-            }
-            break;
-        case 0xFE:
-            if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-                return AVERROR_INVALIDDATA;
-
-            t = bytestream2_get_byteu(&ctx->gb);
-            for (k = 0; k < size; k++)
-                memset(dst + k * stride, t, size);
-            break;
-        case 0xFD:
-            if (bytestream2_get_bytes_left(&ctx->gb) < 3)
-                return AVERROR_INVALIDDATA;
-
-            code = bytestream2_get_byteu(&ctx->gb);
-            pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code];
-            bytestream2_get_bufferu(&ctx->gb, colors, 2);
-
-            for (k = 0; k < size; k++)
-                for (t = 0; t < size; t++)
-                    dst[t + k * stride] = colors[!*pglyph++];
-            break;
-        case 0xFC:
-            for (k = 0; k < size; k++)
-                memcpy(dst + k * stride, prev1 + k * stride, size);
-            break;
-        default:
-            k = bytestream2_tell(&ctx->gb);
-            bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET);
-            t = bytestream2_get_byte(&ctx->gb);
-            bytestream2_seek(&ctx->gb, k, SEEK_SET);
-            for (k = 0; k < size; k++)
-                memset(dst + k * stride, t, size);
-        }
-    } else {
-        int mx = motion_vectors[code][0];
-        int my = motion_vectors[code][1];
-        int index = prev2 - (const uint8_t*)ctx->frm2;
-
-        av_assert2(index >= 0 && index < (ctx->buf_size>>1));
-
-        if (index < - mx - my*stride ||
-            (ctx->buf_size>>1) - index < mx + size + (my + size - 1)*stride) {
-            av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid \n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        for (k = 0; k < size; k++)
-            memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size);
-    }
-
-    return 0;
-}
-
-static int old_codec47(SANMVideoContext *ctx, int top,
-                       int left, int width, int height)
-{
-    int i, j, seq, compr, new_rot, tbl_pos, skip;
-    int stride     = ctx->pitch;
-    uint8_t *dst   = ((uint8_t*)ctx->frm0) + left + top * stride;
-    uint8_t *prev1 = (uint8_t*)ctx->frm1;
-    uint8_t *prev2 = (uint8_t*)ctx->frm2;
-    uint32_t decoded_size;
-
-    tbl_pos = bytestream2_tell(&ctx->gb);
-    seq     = bytestream2_get_le16(&ctx->gb);
-    compr   = bytestream2_get_byte(&ctx->gb);
-    new_rot = bytestream2_get_byte(&ctx->gb);
-    skip    = bytestream2_get_byte(&ctx->gb);
-    bytestream2_skip(&ctx->gb, 9);
-    decoded_size = bytestream2_get_le32(&ctx->gb);
-    bytestream2_skip(&ctx->gb, 8);
-
-    if (decoded_size > ctx->height * stride - left - top * stride) {
-        decoded_size = ctx->height * stride - left - top * stride;
-        av_log(ctx->avctx, AV_LOG_WARNING, "decoded size is too large\n");
-    }
-
-    if (skip & 1)
-        bytestream2_skip(&ctx->gb, 0x8080);
-    if (!seq) {
-        ctx->prev_seq = -1;
-        memset(prev1, 0, ctx->height * stride);
-        memset(prev2, 0, ctx->height * stride);
-    }
-    av_dlog(ctx->avctx, "compression %d\n", compr);
-    switch (compr) {
-    case 0:
-        if (bytestream2_get_bytes_left(&ctx->gb) < width * height)
-            return AVERROR_INVALIDDATA;
-        for (j = 0; j < height; j++) {
-            bytestream2_get_bufferu(&ctx->gb, dst, width);
-            dst += stride;
-        }
-        break;
-    case 1:
-        if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1))
-            return AVERROR_INVALIDDATA;
-        for (j = 0; j < height; j += 2) {
-            for (i = 0; i < width; i += 2) {
-                dst[i] = dst[i + 1] =
-                dst[stride + i] = dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb);
-            }
-            dst += stride * 2;
-        }
-        break;
-    case 2:
-        if (seq == ctx->prev_seq + 1) {
-            for (j = 0; j < height; j += 8) {
-                for (i = 0; i < width; i += 8) {
-                    if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride,
-                                      tbl_pos + 8, 8))
-                        return AVERROR_INVALIDDATA;
-                }
-                dst   += stride * 8;
-                prev1 += stride * 8;
-                prev2 += stride * 8;
-            }
-        }
-        break;
-    case 3:
-        memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height);
-        break;
-    case 4:
-        memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height);
-        break;
-    case 5:
-        if (rle_decode(ctx, dst, decoded_size))
-            return AVERROR_INVALIDDATA;
-        break;
-    default:
-        av_log(ctx->avctx, AV_LOG_ERROR,
-               "subcodec 47 compression %d not implemented\n", compr);
-        return AVERROR_PATCHWELCOME;
-    }
-    if (seq == ctx->prev_seq + 1)
-        ctx->rotate_code = new_rot;
-    else
-        ctx->rotate_code = 0;
-    ctx->prev_seq = seq;
-
-    return 0;
-}
-
-static int process_frame_obj(SANMVideoContext *ctx)
-{
-    uint16_t codec, top, left, w, h;
-
-    codec = bytestream2_get_le16u(&ctx->gb);
-    left  = bytestream2_get_le16u(&ctx->gb);
-    top   = bytestream2_get_le16u(&ctx->gb);
-    w     = bytestream2_get_le16u(&ctx->gb);
-    h     = bytestream2_get_le16u(&ctx->gb);
-
-    if (ctx->width < left + w || ctx->height < top + h) {
-        if (av_image_check_size(FFMAX(left + w, ctx->width),
-                                FFMAX(top  + h, ctx->height), 0, ctx->avctx) < 0)
-            return AVERROR_INVALIDDATA;
-        avcodec_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width),
-                                           FFMAX(top  + h, ctx->height));
-        init_sizes(ctx, FFMAX(left + w, ctx->width),
-                        FFMAX(top  + h, ctx->height));
-        if (init_buffers(ctx)) {
-            av_log(ctx->avctx, AV_LOG_ERROR, "error resizing buffers\n");
-            return AVERROR(ENOMEM);
-        }
-    }
-    bytestream2_skip(&ctx->gb, 4);
-
-    av_dlog(ctx->avctx, "subcodec %d\n", codec);
-    switch (codec) {
-    case 1:
-    case 3:
-        return old_codec1(ctx, top, left, w, h);
-        break;
-    case 37:
-        return old_codec37(ctx, top, left, w, h);
-        break;
-    case 47:
-        return old_codec47(ctx, top, left, w, h);
-        break;
-    default:
-        avpriv_request_sample(ctx->avctx, "unknown subcodec %d", codec);
-        return AVERROR_PATCHWELCOME;
-    }
-}
-
-static int decode_0(SANMVideoContext *ctx)
-{
-    uint16_t *frm = ctx->frm0;
-    int x, y;
-
-    if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "insufficient data for raw frame\n");
-        return AVERROR_INVALIDDATA;
-    }
-    for (y = 0; y < ctx->height; y++) {
-        for (x = 0; x < ctx->width; x++)
-            frm[x] = bytestream2_get_le16u(&ctx->gb);
-        frm += ctx->pitch;
-    }
-    return 0;
-}
-
-static int decode_nop(SANMVideoContext *ctx)
-{
-    avpriv_request_sample(ctx->avctx, "unknown/unsupported compression type");
-    return AVERROR_PATCHWELCOME;
-}
-
-static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch)
-{
-    uint8_t *dst = (uint8_t *)pdest;
-    uint8_t *src = (uint8_t *)psrc;
-    int stride = pitch * 2;
-
-    switch (block_size) {
-    case 2:
-        copy_block4(dst, src, stride, stride, 2);
-        break;
-    case 4:
-        copy_block8(dst, src, stride, stride, 4);
-        break;
-    case 8:
-        copy_block16(dst, src, stride, stride, 8);
-        break;
-    }
-}
-
-static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch)
-{
-    int x, y;
-
-    pitch -= block_size;
-    for (y = 0; y < block_size; y++, pdest += pitch)
-        for (x = 0; x < block_size; x++)
-            *pdest++ = color;
-}
-
-static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index, uint16_t fg_color,
-                      uint16_t bg_color, int block_size, int pitch)
-{
-    int8_t *pglyph;
-    uint16_t colors[2] = { fg_color, bg_color };
-    int x, y;
-
-    if (index >= NGLYPHS) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "ignoring nonexistent glyph #%u\n", index);
-        return AVERROR_INVALIDDATA;
-    }
-
-    pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index];
-    pitch -= block_size;
-
-    for (y = 0; y < block_size; y++, dst += pitch)
-        for (x = 0; x < block_size; x++)
-            *dst++ = colors[*pglyph++];
-    return 0;
-}
-
-static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
-{
-    uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
-
-    if (block_size == 2) {
-        uint32_t indices;
-
-        if (bytestream2_get_bytes_left(&ctx->gb) < 4)
-            return AVERROR_INVALIDDATA;
-
-        indices        = bytestream2_get_le32u(&ctx->gb);
-        dst[0]         = ctx->codebook[indices & 0xFF]; indices >>= 8;
-        dst[1]         = ctx->codebook[indices & 0xFF]; indices >>= 8;
-        dst[pitch]     = ctx->codebook[indices & 0xFF]; indices >>= 8;
-        dst[pitch + 1] = ctx->codebook[indices & 0xFF];
-    } else {
-        uint16_t fgcolor, bgcolor;
-        int glyph;
-
-        if (bytestream2_get_bytes_left(&ctx->gb) < 3)
-            return AVERROR_INVALIDDATA;
-
-        glyph   = bytestream2_get_byteu(&ctx->gb);
-        bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
-        fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
-
-        draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
-    }
-    return 0;
-}
-
-static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
-{
-    uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
-
-    if (block_size == 2) {
-        if (bytestream2_get_bytes_left(&ctx->gb) < 8)
-            return AVERROR_INVALIDDATA;
-
-        dst[0]         = bytestream2_get_le16u(&ctx->gb);
-        dst[1]         = bytestream2_get_le16u(&ctx->gb);
-        dst[pitch]     = bytestream2_get_le16u(&ctx->gb);
-        dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb);
-    } else {
-        uint16_t fgcolor, bgcolor;
-        int glyph;
-
-        if (bytestream2_get_bytes_left(&ctx->gb) < 5)
-            return AVERROR_INVALIDDATA;
-
-        glyph   = bytestream2_get_byteu(&ctx->gb);
-        bgcolor = bytestream2_get_le16u(&ctx->gb);
-        fgcolor = bytestream2_get_le16u(&ctx->gb);
-
-        draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
-    }
-    return 0;
-}
-
-static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my,
-                     int block_size)
-{
-    int start_pos = cx + mx + (cy + my) * ctx->pitch;
-    int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1);
-
-    int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1);
-
-    if (!good) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n",
-               cx + mx, cy + my, cx, cy, block_size);
-    }
-
-    return good;
-}
-
-static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size)
-{
-    int16_t mx, my, index;
-    int opcode;
-
-    if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-        return AVERROR_INVALIDDATA;
-
-    opcode = bytestream2_get_byteu(&ctx->gb);
-
-    av_dlog(ctx->avctx, "opcode 0x%0X cx %d cy %d blk %d\n", opcode, cx, cy, blk_size);
-    switch (opcode) {
-    default:
-        mx = motion_vectors[opcode][0];
-        my = motion_vectors[opcode][1];
-
-        if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
-            copy_block(ctx->frm0 + cx      + ctx->pitch *  cy,
-                       ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
-                       blk_size, ctx->pitch);
-        }
-        break;
-    case 0xF5:
-        if (bytestream2_get_bytes_left(&ctx->gb) < 2)
-            return AVERROR_INVALIDDATA;
-        index = bytestream2_get_le16u(&ctx->gb);
-
-        mx = index % ctx->width;
-        my = index / ctx->width;
-
-        if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
-            copy_block(ctx->frm0 + cx      + ctx->pitch *  cy,
-                       ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
-                       blk_size, ctx->pitch);
-        }
-        break;
-    case 0xF6:
-        copy_block(ctx->frm0 + cx + ctx->pitch * cy,
-                   ctx->frm1 + cx + ctx->pitch * cy,
-                   blk_size, ctx->pitch);
-        break;
-    case 0xF7:
-        opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch);
-        break;
-
-    case 0xF8:
-        opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
-        break;
-    case 0xF9:
-    case 0xFA:
-    case 0xFB:
-    case 0xFC:
-        fill_block(ctx->frm0 + cx + cy * ctx->pitch,
-                   ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch);
-        break;
-    case 0xFD:
-        if (bytestream2_get_bytes_left(&ctx->gb) < 1)
-            return AVERROR_INVALIDDATA;
-        fill_block(ctx->frm0 + cx + cy * ctx->pitch,
-                   ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch);
-        break;
-    case 0xFE:
-        if (bytestream2_get_bytes_left(&ctx->gb) < 2)
-            return AVERROR_INVALIDDATA;
-        fill_block(ctx->frm0 + cx + cy * ctx->pitch,
-                   bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch);
-        break;
-    case 0xFF:
-        if (blk_size == 2) {
-            opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
-        } else {
-            blk_size >>= 1;
-            if (codec2subblock(ctx, cx           , cy           , blk_size))
-                return AVERROR_INVALIDDATA;
-            if (codec2subblock(ctx, cx + blk_size, cy           , blk_size))
-                return AVERROR_INVALIDDATA;
-            if (codec2subblock(ctx, cx           , cy + blk_size, blk_size))
-                return AVERROR_INVALIDDATA;
-            if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size))
-                return AVERROR_INVALIDDATA;
-        }
-        break;
-    }
-    return 0;
-}
-
-static int decode_2(SANMVideoContext *ctx)
-{
-    int cx, cy, ret;
-
-    for (cy = 0; cy < ctx->aligned_height; cy += 8) {
-        for (cx = 0; cx < ctx->aligned_width; cx += 8) {
-            if (ret = codec2subblock(ctx, cx, cy, 8))
-                return ret;
-        }
-    }
-
-    return 0;
-}
-
-static int decode_3(SANMVideoContext *ctx)
-{
-    memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size);
-    return 0;
-}
-
-static int decode_4(SANMVideoContext *ctx)
-{
-    memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size);
-    return 0;
-}
-
-static int decode_5(SANMVideoContext *ctx)
-{
-#if HAVE_BIGENDIAN
-    uint16_t *frm;
-    int npixels;
-#endif
-    uint8_t *dst = (uint8_t*)ctx->frm0;
-
-    if (rle_decode(ctx, dst, ctx->buf_size))
-        return AVERROR_INVALIDDATA;
-
-#if HAVE_BIGENDIAN
-    npixels = ctx->npixels;
-    frm = ctx->frm0;
-    while (npixels--)
-        *frm++ = av_bswap16(*frm);
-#endif
-
-    return 0;
-}
-
-static int decode_6(SANMVideoContext *ctx)
-{
-    int npixels = ctx->npixels;
-    uint16_t *frm = ctx->frm0;
-
-    if (bytestream2_get_bytes_left(&ctx->gb) < npixels) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "insufficient data for frame\n");
-        return AVERROR_INVALIDDATA;
-    }
-    while (npixels--)
-        *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
-
-    return 0;
-}
-
-static int decode_8(SANMVideoContext *ctx)
-{
-    uint16_t *pdest = ctx->frm0;
-    uint8_t *rsrc;
-    long npixels = ctx->npixels;
-
-    av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels);
-    if (!ctx->rle_buf) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed\n");
-        return AVERROR(ENOMEM);
-    }
-    rsrc = ctx->rle_buf;
-
-    if (rle_decode(ctx, rsrc, npixels))
-        return AVERROR_INVALIDDATA;
-
-    while (npixels--)
-        *pdest++ = ctx->codebook[*rsrc++];
-
-    return 0;
-}
-
-typedef int (*frm_decoder)(SANMVideoContext *ctx);
-
-static const frm_decoder v1_decoders[] = {
-    decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5,
-    decode_6, decode_nop, decode_8
-};
-
-static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr)
-{
-    int i, ret;
-
-    if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "too short input frame (%d bytes)\n",
-               ret);
-        return AVERROR_INVALIDDATA;
-    }
-    bytestream2_skip(&ctx->gb, 8); // skip pad
-
-    hdr->width  = bytestream2_get_le32u(&ctx->gb);
-    hdr->height = bytestream2_get_le32u(&ctx->gb);
-
-    if (hdr->width != ctx->width || hdr->height != ctx->height) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "variable size frames are not implemented\n");
-        return AVERROR_PATCHWELCOME;
-    }
-
-    hdr->seq_num     = bytestream2_get_le16u(&ctx->gb);
-    hdr->codec       = bytestream2_get_byteu(&ctx->gb);
-    hdr->rotate_code = bytestream2_get_byteu(&ctx->gb);
-
-    bytestream2_skip(&ctx->gb, 4); // skip pad
-
-    for (i = 0; i < 4; i++)
-        ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb);
-    hdr->bg_color = bytestream2_get_le16u(&ctx->gb);
-
-    bytestream2_skip(&ctx->gb, 2); // skip pad
-
-    hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb);
-    for (i = 0; i < 256; i++)
-        ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb);
-
-    bytestream2_skip(&ctx->gb, 8); // skip pad
-
-    av_dlog(ctx->avctx, "subcodec %d\n", hdr->codec);
-    return 0;
-}
-
-static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
-{
-    while (buf_size--)
-        *pbuf++ = color;
-}
-
-static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr)
-{
-    uint8_t *dst;
-    const uint8_t *src = (uint8_t*) ctx->frm0;
-    int ret, dstpitch, height = ctx->height;
-    int srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1);
-
-    if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0)
-        return ret;
-
-    dst      = ctx->frame->data[0];
-    dstpitch = ctx->frame->linesize[0];
-
-    while (height--) {
-        memcpy(dst, src, srcpitch);
-        src += srcpitch;
-        dst += dstpitch;
-    }
-
-    return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx, void *data,
-                        int *got_frame_ptr, AVPacket *pkt)
-{
-    SANMVideoContext *ctx = avctx->priv_data;
-    int i, ret;
-
-    ctx->frame = data;
-    bytestream2_init(&ctx->gb, pkt->data, pkt->size);
-
-    if (!ctx->version) {
-        int to_store = 0;
-
-        while (bytestream2_get_bytes_left(&ctx->gb) >= 8) {
-            uint32_t sig, size;
-            int pos;
-
-            sig  = bytestream2_get_be32u(&ctx->gb);
-            size = bytestream2_get_be32u(&ctx->gb);
-            pos  = bytestream2_tell(&ctx->gb);
-
-            if (bytestream2_get_bytes_left(&ctx->gb) < size) {
-                av_log(avctx, AV_LOG_ERROR, "incorrect chunk size %d\n", size);
-                break;
-            }
-            switch (sig) {
-            case MKBETAG('N', 'P', 'A', 'L'):
-                if (size != 256 * 3) {
-                    av_log(avctx, AV_LOG_ERROR, "incorrect palette block size %d\n",
-                           size);
-                    return AVERROR_INVALIDDATA;
-                }
-                for (i = 0; i < 256; i++)
-                    ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
-                break;
-            case MKBETAG('F', 'O', 'B', 'J'):
-                if (size < 16)
-                    return AVERROR_INVALIDDATA;
-                if (ret = process_frame_obj(ctx))
-                    return ret;
-                break;
-            case MKBETAG('X', 'P', 'A', 'L'):
-                if (size == 6 || size == 4) {
-                    uint8_t tmp[3];
-                    int j;
-
-                    for (i = 0; i < 256; i++) {
-                        for (j = 0; j < 3; j++) {
-                            int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF;
-                            tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7);
-                        }
-                        ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp);
-                    }
-                } else {
-                    if (size < 768 * 2 + 4) {
-                        av_log(avctx, AV_LOG_ERROR, "incorrect palette change block size %d\n",
-                               size);
-                        return AVERROR_INVALIDDATA;
-                    }
-                    bytestream2_skipu(&ctx->gb, 4);
-                    for (i = 0; i < 768; i++)
-                        ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb);
-                    if (size >= 768 * 5 + 4) {
-                        for (i = 0; i < 256; i++)
-                            ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
-                    } else {
-                        memset(ctx->pal, 0, sizeof(ctx->pal));
-                    }
-                }
-                break;
-            case MKBETAG('S', 'T', 'O', 'R'):
-                to_store = 1;
-                break;
-            case MKBETAG('F', 'T', 'C', 'H'):
-                memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size);
-                break;
-            default:
-                bytestream2_skip(&ctx->gb, size);
-                av_log(avctx, AV_LOG_DEBUG, "unknown/unsupported chunk %x\n", sig);
-                break;
-            }
-
-            bytestream2_seek(&ctx->gb, pos + size, SEEK_SET);
-            if (size & 1)
-                bytestream2_skip(&ctx->gb, 1);
-        }
-        if (to_store)
-            memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size);
-        if ((ret = copy_output(ctx, NULL)))
-            return ret;
-        memcpy(ctx->frame->data[1], ctx->pal, 1024);
-    } else {
-        SANMFrameHeader header;
-
-        if ((ret = read_frame_header(ctx, &header)))
-            return ret;
-
-        ctx->rotate_code = header.rotate_code;
-        if ((ctx->frame->key_frame = !header.seq_num)) {
-            ctx->frame->pict_type = AV_PICTURE_TYPE_I;
-            fill_frame(ctx->frm1, ctx->npixels, header.bg_color);
-            fill_frame(ctx->frm2, ctx->npixels, header.bg_color);
-        } else {
-            ctx->frame->pict_type = AV_PICTURE_TYPE_P;
-        }
-
-        if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) {
-            if ((ret = v1_decoders[header.codec](ctx))) {
-                av_log(avctx, AV_LOG_ERROR,
-                       "subcodec %d: error decoding frame\n", header.codec);
-                return ret;
-            }
-        } else {
-            avpriv_request_sample(avctx, "subcodec %d",
-                   header.codec);
-            return AVERROR_PATCHWELCOME;
-        }
-
-        if ((ret = copy_output(ctx, &header)))
-            return ret;
-    }
-    if (ctx->rotate_code)
-        rotate_bufs(ctx, ctx->rotate_code);
-
-    *got_frame_ptr  = 1;
-
-    return pkt->size;
-}
-
-AVCodec ff_sanm_decoder = {
-    .name           = "sanm",
-    .type           = AVMEDIA_TYPE_VIDEO,
-    .id             = AV_CODEC_ID_SANM,
-    .priv_data_size = sizeof(SANMVideoContext),
-    .init           = decode_init,
-    .close          = decode_end,
-    .decode         = decode_frame,
-    .capabilities   = CODEC_CAP_DR1,
-    .long_name      = NULL_IF_CONFIG_SMALL("LucasArts SMUSH video"),
-};