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-rw-r--r--libavcodec/sanm.c1305
1 files changed, 1305 insertions, 0 deletions
diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
new file mode 100644
index 0000000000..e6e866ef8e
--- /dev/null
+++ b/libavcodec/sanm.c
@@ -0,0 +1,1305 @@
+/*
+ * 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 (!w || !h) {
+ av_log(ctx->avctx, AV_LOG_ERROR, "dimensions are invalid\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ 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"),
+};
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