forked from KolibriOS/kolibrios
1308 lines
41 KiB
C
1308 lines
41 KiB
C
/*
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* LucasArts Smush video decoder
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* Copyright (c) 2006 Cyril Zorin
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* Copyright (c) 2011 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// #define DEBUG 1
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#include "avcodec.h"
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#include "copy_block.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "libavutil/bswap.h"
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#include "libavutil/imgutils.h"
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#include "sanm_data.h"
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#include "libavutil/avassert.h"
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#define NGLYPHS 256
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typedef struct {
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AVCodecContext *avctx;
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GetByteContext gb;
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int version, subversion;
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uint32_t pal[256];
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int16_t delta_pal[768];
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int pitch;
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int width, height;
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int aligned_width, aligned_height;
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int prev_seq;
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AVFrame *frame;
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uint16_t *frm0, *frm1, *frm2;
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uint8_t *stored_frame;
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uint32_t frm0_size, frm1_size, frm2_size;
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uint32_t stored_frame_size;
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uint8_t *rle_buf;
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unsigned int rle_buf_size;
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int rotate_code;
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long npixels, buf_size;
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uint16_t codebook[256];
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uint16_t small_codebook[4];
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int8_t p4x4glyphs[NGLYPHS][16];
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int8_t p8x8glyphs[NGLYPHS][64];
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} SANMVideoContext;
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typedef struct {
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int seq_num, codec, rotate_code, rle_output_size;
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uint16_t bg_color;
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uint32_t width, height;
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} SANMFrameHeader;
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enum GlyphEdge {
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LEFT_EDGE,
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TOP_EDGE,
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RIGHT_EDGE,
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BOTTOM_EDGE,
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NO_EDGE
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};
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enum GlyphDir {
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DIR_LEFT,
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DIR_UP,
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DIR_RIGHT,
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DIR_DOWN,
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NO_DIR
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};
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/**
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* Return enum GlyphEdge of box where point (x, y) lies.
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*
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* @param x x point coordinate
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* @param y y point coordinate
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* @param edge_size box width/height.
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*/
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static enum GlyphEdge which_edge(int x, int y, int edge_size)
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{
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const int edge_max = edge_size - 1;
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if (!y) {
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return BOTTOM_EDGE;
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} else if (y == edge_max) {
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return TOP_EDGE;
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} else if (!x) {
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return LEFT_EDGE;
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} else if (x == edge_max) {
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return RIGHT_EDGE;
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} else {
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return NO_EDGE;
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}
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}
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static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
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{
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if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) ||
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(edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) ||
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(edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) ||
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(edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE)) {
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return DIR_UP;
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} else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) ||
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(edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE)) {
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return DIR_DOWN;
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} else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) ||
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(edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE)) {
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return DIR_LEFT;
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} else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) ||
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(edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) ||
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(edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) ||
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(edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE)) {
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return DIR_RIGHT;
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}
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return NO_DIR;
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}
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/**
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* Interpolate two points.
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*/
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static void interp_point(int8_t *points, int x0, int y0, int x1, int y1,
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int pos, int npoints)
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{
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if (npoints) {
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points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints;
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points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints;
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} else {
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points[0] = x0;
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points[1] = y0;
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}
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}
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/**
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* Construct glyphs by iterating through vectors coordinates.
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*
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* @param pglyphs pointer to table where glyphs are stored
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* @param xvec pointer to x component of vectors coordinates
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* @param yvec pointer to y component of vectors coordinates
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* @param side_length glyph width/height.
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*/
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static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec,
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const int side_length)
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{
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const int glyph_size = side_length * side_length;
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int8_t *pglyph = pglyphs;
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int i, j;
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for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) {
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int x0 = xvec[i];
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int y0 = yvec[i];
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enum GlyphEdge edge0 = which_edge(x0, y0, side_length);
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for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) {
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int x1 = xvec[j];
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int y1 = yvec[j];
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enum GlyphEdge edge1 = which_edge(x1, y1, side_length);
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enum GlyphDir dir = which_direction(edge0, edge1);
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int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0));
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int ipoint;
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for (ipoint = 0; ipoint <= npoints; ipoint++) {
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int8_t point[2];
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int irow, icol;
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interp_point(point, x0, y0, x1, y1, ipoint, npoints);
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switch (dir) {
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case DIR_UP:
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for (irow = point[1]; irow >= 0; irow--)
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pglyph[point[0] + irow * side_length] = 1;
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break;
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case DIR_DOWN:
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for (irow = point[1]; irow < side_length; irow++)
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pglyph[point[0] + irow * side_length] = 1;
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break;
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case DIR_LEFT:
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for (icol = point[0]; icol >= 0; icol--)
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pglyph[icol + point[1] * side_length] = 1;
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break;
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case DIR_RIGHT:
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for (icol = point[0]; icol < side_length; icol++)
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pglyph[icol + point[1] * side_length] = 1;
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break;
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}
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}
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}
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}
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}
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static void init_sizes(SANMVideoContext *ctx, int width, int height)
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{
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ctx->width = width;
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ctx->height = height;
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ctx->npixels = width * height;
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ctx->aligned_width = FFALIGN(width, 8);
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ctx->aligned_height = FFALIGN(height, 8);
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ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]);
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ctx->pitch = width;
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}
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static void destroy_buffers(SANMVideoContext *ctx)
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{
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av_freep(&ctx->frm0);
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av_freep(&ctx->frm1);
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av_freep(&ctx->frm2);
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av_freep(&ctx->stored_frame);
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av_freep(&ctx->rle_buf);
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ctx->frm0_size =
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ctx->frm1_size =
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ctx->frm2_size = 0;
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}
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static av_cold int init_buffers(SANMVideoContext *ctx)
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{
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av_fast_padded_malloc(&ctx->frm0, &ctx->frm0_size, ctx->buf_size);
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av_fast_padded_malloc(&ctx->frm1, &ctx->frm1_size, ctx->buf_size);
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av_fast_padded_malloc(&ctx->frm2, &ctx->frm2_size, ctx->buf_size);
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if (!ctx->version)
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av_fast_padded_malloc(&ctx->stored_frame, &ctx->stored_frame_size, ctx->buf_size);
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if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || (!ctx->stored_frame && !ctx->version)) {
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destroy_buffers(ctx);
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return AVERROR(ENOMEM);
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}
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return 0;
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}
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static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
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{
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av_dlog(ctx->avctx, "rotate %d\n", rotate_code);
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if (rotate_code == 2)
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FFSWAP(uint16_t*, ctx->frm1, ctx->frm2);
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FFSWAP(uint16_t*, ctx->frm2, ctx->frm0);
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}
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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SANMVideoContext *ctx = avctx->priv_data;
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ctx->avctx = avctx;
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ctx->version = !avctx->extradata_size;
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avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8;
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init_sizes(ctx, avctx->width, avctx->height);
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if (init_buffers(ctx)) {
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av_log(avctx, AV_LOG_ERROR, "error allocating buffers\n");
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return AVERROR(ENOMEM);
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}
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make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4);
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make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8);
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if (!ctx->version) {
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int i;
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if (avctx->extradata_size < 1026) {
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av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
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return AVERROR_INVALIDDATA;
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}
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ctx->subversion = AV_RL16(avctx->extradata);
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for (i = 0; i < 256; i++)
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ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4);
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}
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return 0;
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}
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static av_cold int decode_end(AVCodecContext *avctx)
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{
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SANMVideoContext *ctx = avctx->priv_data;
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destroy_buffers(ctx);
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return 0;
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}
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static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size)
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{
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int opcode, color, run_len, left = out_size;
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while (left > 0) {
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opcode = bytestream2_get_byte(&ctx->gb);
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run_len = (opcode >> 1) + 1;
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if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0)
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return AVERROR_INVALIDDATA;
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if (opcode & 1) {
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color = bytestream2_get_byte(&ctx->gb);
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memset(dst, color, run_len);
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} else {
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if (bytestream2_get_bytes_left(&ctx->gb) < run_len)
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return AVERROR_INVALIDDATA;
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bytestream2_get_bufferu(&ctx->gb, dst, run_len);
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}
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dst += run_len;
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left -= run_len;
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}
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return 0;
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}
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static int old_codec1(SANMVideoContext *ctx, int top,
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int left, int width, int height)
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{
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uint8_t *dst = ((uint8_t*)ctx->frm0) + left + top * ctx->pitch;
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int i, j, len, flag, code, val, pos, end;
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for (i = 0; i < height; i++) {
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pos = 0;
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if (bytestream2_get_bytes_left(&ctx->gb) < 2)
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return AVERROR_INVALIDDATA;
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len = bytestream2_get_le16u(&ctx->gb);
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end = bytestream2_tell(&ctx->gb) + len;
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while (bytestream2_tell(&ctx->gb) < end) {
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if (bytestream2_get_bytes_left(&ctx->gb) < 2)
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return AVERROR_INVALIDDATA;
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code = bytestream2_get_byteu(&ctx->gb);
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flag = code & 1;
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code = (code >> 1) + 1;
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if (pos + code > width)
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return AVERROR_INVALIDDATA;
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if (flag) {
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val = bytestream2_get_byteu(&ctx->gb);
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if (val)
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memset(dst + pos, val, code);
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pos += code;
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} else {
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if (bytestream2_get_bytes_left(&ctx->gb) < code)
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return AVERROR_INVALIDDATA;
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for (j = 0; j < code; j++) {
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val = bytestream2_get_byteu(&ctx->gb);
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if (val)
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dst[pos] = val;
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pos++;
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}
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}
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}
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dst += ctx->pitch;
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}
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ctx->rotate_code = 0;
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return 0;
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}
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static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
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int height, int stride, int x, int y)
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{
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int pos, i, j;
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pos = x + y * stride;
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for (j = 0; j < 4; j++) {
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for (i = 0; i < 4; i++) {
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if ((pos + i) < 0 || (pos + i) >= height * stride)
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dst[i] = 0;
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else
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dst[i] = src[i];
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}
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dst += stride;
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src += stride;
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pos += stride;
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}
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}
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static int old_codec37(SANMVideoContext *ctx, int top,
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int left, int width, int height)
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{
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int stride = ctx->pitch;
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int i, j, k, t;
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int skip_run = 0;
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int compr, mvoff, seq, flags;
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uint32_t decoded_size;
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uint8_t *dst, *prev;
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compr = bytestream2_get_byte(&ctx->gb);
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mvoff = bytestream2_get_byte(&ctx->gb);
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seq = bytestream2_get_le16(&ctx->gb);
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decoded_size = bytestream2_get_le32(&ctx->gb);
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bytestream2_skip(&ctx->gb, 4);
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flags = bytestream2_get_byte(&ctx->gb);
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bytestream2_skip(&ctx->gb, 3);
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if (decoded_size > ctx->height * stride - left - top * stride) {
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decoded_size = ctx->height * stride - left - top * stride;
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av_log(ctx->avctx, AV_LOG_WARNING, "decoded size is too large\n");
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}
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ctx->rotate_code = 0;
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if (((seq & 1) || !(flags & 1)) && (compr && compr != 2))
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rotate_bufs(ctx, 1);
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dst = ((uint8_t*)ctx->frm0) + left + top * stride;
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prev = ((uint8_t*)ctx->frm2) + left + top * stride;
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if (mvoff > 2) {
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av_log(ctx->avctx, AV_LOG_ERROR, "invalid motion base value %d\n", mvoff);
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return AVERROR_INVALIDDATA;
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}
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av_dlog(ctx->avctx, "compression %d\n", compr);
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switch (compr) {
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case 0:
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for (i = 0; i < height; i++) {
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bytestream2_get_buffer(&ctx->gb, dst, width);
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dst += stride;
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}
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memset(ctx->frm1, 0, ctx->height * stride);
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memset(ctx->frm2, 0, ctx->height * stride);
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break;
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case 2:
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if (rle_decode(ctx, dst, decoded_size))
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return AVERROR_INVALIDDATA;
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memset(ctx->frm1, 0, ctx->frm1_size);
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memset(ctx->frm2, 0, ctx->frm2_size);
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break;
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case 3:
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case 4:
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if (flags & 4) {
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for (j = 0; j < height; j += 4) {
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for (i = 0; i < width; i += 4) {
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int code;
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if (skip_run) {
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skip_run--;
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copy_block4(dst + i, prev + i, stride, stride, 4);
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continue;
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}
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if (bytestream2_get_bytes_left(&ctx->gb) < 1)
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return AVERROR_INVALIDDATA;
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code = bytestream2_get_byteu(&ctx->gb);
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switch (code) {
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case 0xFF:
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if (bytestream2_get_bytes_left(&ctx->gb) < 16)
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return AVERROR_INVALIDDATA;
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for (k = 0; k < 4; k++)
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bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
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break;
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case 0xFE:
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if (bytestream2_get_bytes_left(&ctx->gb) < 4)
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return AVERROR_INVALIDDATA;
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for (k = 0; k < 4; k++)
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memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4);
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break;
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case 0xFD:
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if (bytestream2_get_bytes_left(&ctx->gb) < 1)
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return AVERROR_INVALIDDATA;
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t = bytestream2_get_byteu(&ctx->gb);
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for (k = 0; k < 4; k++)
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memset(dst + i + k * stride, t, 4);
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break;
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default:
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if (compr == 4 && !code) {
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if (bytestream2_get_bytes_left(&ctx->gb) < 1)
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return AVERROR_INVALIDDATA;
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skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
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i -= 4;
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} else {
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int mx, my;
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mx = c37_mv[(mvoff * 255 + code) * 2 ];
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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);
|
|
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",
|
|
.long_name = NULL_IF_CONFIG_SMALL("LucasArts SMUSH video"),
|
|
.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,
|
|
};
|