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20f9727018
Up until now, codec.h contains both public and private parts of AVCodec. This exposes the internals of AVCodec to users and leads them into the temptation of actually using them and forces us to forward-declare structures and types that users can't use at all. This commit changes this by adding a new structure FFCodec to codec_internal.h that extends AVCodec, i.e. contains the public AVCodec as first member; the private fields of AVCodec are moved to this structure, leaving codec.h clean. Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
749 lines
24 KiB
C
749 lines
24 KiB
C
/*
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* Argonaut Games Video decoder
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* Copyright (c) 2020 Paul B Mahol
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "codec_internal.h"
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#include "internal.h"
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typedef struct ArgoContext {
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GetByteContext gb;
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int bpp;
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int key;
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int mv0[128][2];
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int mv1[16][2];
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uint32_t pal[256];
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AVFrame *frame;
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} ArgoContext;
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static int decode_pal8(AVCodecContext *avctx, uint32_t *pal)
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{
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ArgoContext *s = avctx->priv_data;
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GetByteContext *gb = &s->gb;
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int start, count;
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start = bytestream2_get_le16(gb);
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count = bytestream2_get_le16(gb);
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if (start + count > 256)
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return AVERROR_INVALIDDATA;
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if (bytestream2_get_bytes_left(gb) < 3 * count)
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return AVERROR_INVALIDDATA;
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for (int i = 0; i < count; i++)
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pal[start + i] = (0xFFU << 24) | bytestream2_get_be24u(gb);
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return 0;
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}
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static int decode_avcf(AVCodecContext *avctx, AVFrame *frame)
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{
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ArgoContext *s = avctx->priv_data;
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GetByteContext *gb = &s->gb;
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const int l = frame->linesize[0];
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const uint8_t *map = gb->buffer;
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uint8_t *dst = frame->data[0];
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if (bytestream2_get_bytes_left(gb) < 1024 + (frame->width / 2) * (frame->height / 2))
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return AVERROR_INVALIDDATA;
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bytestream2_skipu(gb, 1024);
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for (int y = 0; y < frame->height; y += 2) {
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for (int x = 0; x < frame->width; x += 2) {
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int index = bytestream2_get_byteu(gb);
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const uint8_t *block = map + index * 4;
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dst[x+0] = block[0];
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dst[x+1] = block[1];
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dst[x+l] = block[2];
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dst[x+l+1] = block[3];
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}
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dst += frame->linesize[0] * 2;
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}
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return 0;
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}
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static int decode_alcd(AVCodecContext *avctx, AVFrame *frame)
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{
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ArgoContext *s = avctx->priv_data;
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GetByteContext *gb = &s->gb;
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GetByteContext sb;
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const int l = frame->linesize[0];
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const uint8_t *map = gb->buffer;
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uint8_t *dst = frame->data[0];
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uint8_t codes = 0;
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int count = 0;
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if (bytestream2_get_bytes_left(gb) < 1024 + (((frame->width / 2) * (frame->height / 2) + 7) >> 3))
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return AVERROR_INVALIDDATA;
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bytestream2_skipu(gb, 1024);
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sb = *gb;
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bytestream2_skipu(gb, ((frame->width / 2) * (frame->height / 2) + 7) >> 3);
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for (int y = 0; y < frame->height; y += 2) {
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for (int x = 0; x < frame->width; x += 2) {
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const uint8_t *block;
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int index;
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if (count == 0) {
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codes = bytestream2_get_byteu(&sb);
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count = 8;
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}
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if (codes & 0x80) {
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index = bytestream2_get_byte(gb);
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block = map + index * 4;
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dst[x+0] = block[0];
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dst[x+1] = block[1];
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dst[x+l] = block[2];
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dst[x+l+1] = block[3];
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}
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codes <<= 1;
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count--;
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}
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dst += frame->linesize[0] * 2;
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}
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return 0;
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}
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static int decode_mad1(AVCodecContext *avctx, AVFrame *frame)
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{
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ArgoContext *s = avctx->priv_data;
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GetByteContext *gb = &s->gb;
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const int w = frame->width;
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const int h = frame->height;
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const int l = frame->linesize[0];
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while (bytestream2_get_bytes_left(gb) > 0) {
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int size, type, pos, dy;
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uint8_t *dst;
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type = bytestream2_get_byte(gb);
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if (type == 0xFF)
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break;
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switch (type) {
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case 8:
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dst = frame->data[0];
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for (int y = 0; y < h; y += 8) {
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for (int x = 0; x < w; x += 8) {
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int fill = bytestream2_get_byte(gb);
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uint8_t *ddst = dst + x;
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for (int by = 0; by < 8; by++) {
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memset(ddst, fill, 8);
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ddst += l;
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}
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}
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dst += 8 * l;
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}
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break;
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case 7:
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while (bytestream2_get_bytes_left(gb) > 0) {
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int bsize = bytestream2_get_byte(gb);
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uint8_t *src;
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int count;
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if (!bsize)
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break;
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count = bytestream2_get_be16(gb);
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while (count > 0) {
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int mvx, mvy, a, b, c, mx, my;
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int bsize_w, bsize_h;
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bsize_w = bsize_h = bsize;
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if (bytestream2_get_bytes_left(gb) < 4)
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return AVERROR_INVALIDDATA;
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mvx = bytestream2_get_byte(gb) * bsize;
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mvy = bytestream2_get_byte(gb) * bsize;
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a = bytestream2_get_byte(gb);
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b = bytestream2_get_byte(gb);
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c = ((a & 0x3F) << 8) + b;
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mx = mvx + (c & 0x7F) - 64;
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my = mvy + (c >> 7) - 64;
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if (mvy < 0 || mvy >= h)
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return AVERROR_INVALIDDATA;
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if (mvx < 0 || mvx >= w)
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return AVERROR_INVALIDDATA;
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if (my < 0 || my >= h)
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return AVERROR_INVALIDDATA;
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if (mx < 0 || mx >= w)
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return AVERROR_INVALIDDATA;
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dst = frame->data[0] + mvx + l * mvy;
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src = frame->data[0] + mx + l * my;
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bsize_w = FFMIN3(bsize_w, w - mvx, w - mx);
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bsize_h = FFMIN3(bsize_h, h - mvy, h - my);
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if (mvy >= my && (mvy != my || mvx >= mx)) {
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src += (bsize_h - 1) * l;
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dst += (bsize_h - 1) * l;
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for (int by = 0; by < bsize_h; by++) {
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memmove(dst, src, bsize_w);
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src -= l;
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dst -= l;
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}
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} else {
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for (int by = 0; by < bsize_h; by++) {
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memmove(dst, src, bsize_w);
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src += l;
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dst += l;
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}
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}
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count--;
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}
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}
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break;
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case 6:
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dst = frame->data[0];
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if (bytestream2_get_bytes_left(gb) < w * h)
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return AVERROR_INVALIDDATA;
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for (int y = 0; y < h; y++) {
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bytestream2_get_bufferu(gb, dst, w);
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dst += l;
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}
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break;
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case 5:
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dst = frame->data[0];
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for (int y = 0; y < h; y += 2) {
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for (int x = 0; x < w; x += 2) {
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int fill = bytestream2_get_byte(gb);
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uint8_t *ddst = dst + x;
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fill = (fill << 8) | fill;
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for (int by = 0; by < 2; by++) {
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AV_WN16(ddst, fill);
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ddst += l;
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}
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}
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dst += 2 * l;
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}
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break;
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case 3:
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size = bytestream2_get_le16(gb);
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if (size > 0) {
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int x = bytestream2_get_byte(gb) * 4;
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int y = bytestream2_get_byte(gb) * 4;
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int count = bytestream2_get_byte(gb);
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int fill = bytestream2_get_byte(gb);
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av_log(avctx, AV_LOG_DEBUG, "%d %d %d %d\n", x, y, count, fill);
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for (int i = 0; i < count; i++)
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;
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return AVERROR_PATCHWELCOME;
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}
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break;
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case 2:
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dst = frame->data[0];
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pos = 0;
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dy = 0;
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while (bytestream2_get_bytes_left(gb) > 0) {
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int count = bytestream2_get_byteu(gb);
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int skip = count & 0x3F;
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count = count >> 6;
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if (skip == 0x3F) {
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pos += 0x3E;
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while (pos >= w) {
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pos -= w;
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dst += l;
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dy++;
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if (dy >= h)
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return 0;
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}
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} else {
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pos += skip;
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while (pos >= w) {
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pos -= w;
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dst += l;
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dy++;
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if (dy >= h)
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return 0;
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}
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while (count >= 0) {
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int bits = bytestream2_get_byte(gb);
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for (int i = 0; i < 4; i++) {
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switch (bits & 3) {
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case 0:
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break;
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case 1:
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if (dy < 1 && !pos)
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return AVERROR_INVALIDDATA;
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else
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dst[pos] = pos ? dst[pos - 1] : dst[-l + w - 1];
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break;
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case 2:
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if (dy < 1)
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return AVERROR_INVALIDDATA;
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dst[pos] = dst[pos - l];
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break;
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case 3:
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dst[pos] = bytestream2_get_byte(gb);
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break;
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}
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pos++;
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if (pos >= w) {
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pos -= w;
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dst += l;
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dy++;
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if (dy >= h)
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return 0;
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}
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bits >>= 2;
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}
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count--;
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}
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}
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}
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break;
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default:
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return AVERROR_INVALIDDATA;
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}
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}
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return 0;
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}
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static int decode_mad1_24(AVCodecContext *avctx, AVFrame *frame)
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{
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ArgoContext *s = avctx->priv_data;
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GetByteContext *gb = &s->gb;
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const int w = frame->width;
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const int h = frame->height;
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const int l = frame->linesize[0] / 4;
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while (bytestream2_get_bytes_left(gb) > 0) {
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int osize, type, pos, dy, di, bcode, value, v14;
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const uint8_t *bits;
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uint32_t *dst;
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type = bytestream2_get_byte(gb);
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if (type == 0xFF)
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return 0;
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switch (type) {
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case 8:
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dst = (uint32_t *)frame->data[0];
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for (int y = 0; y + 12 <= h; y += 12) {
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for (int x = 0; x + 12 <= w; x += 12) {
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int fill = bytestream2_get_be24(gb);
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uint32_t *dstp = dst + x;
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for (int by = 0; by < 12; by++) {
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for (int bx = 0; bx < 12; bx++)
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dstp[bx] = fill;
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dstp += l;
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}
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}
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dst += 12 * l;
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}
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break;
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case 7:
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while (bytestream2_get_bytes_left(gb) > 0) {
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int bsize = bytestream2_get_byte(gb);
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uint32_t *src;
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int count;
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if (!bsize)
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break;
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count = bytestream2_get_be16(gb);
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while (count > 0) {
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int mvx, mvy, a, b, c, mx, my;
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int bsize_w, bsize_h;
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bsize_w = bsize_h = bsize;
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if (bytestream2_get_bytes_left(gb) < 4)
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return AVERROR_INVALIDDATA;
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mvx = bytestream2_get_byte(gb) * bsize;
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mvy = bytestream2_get_byte(gb) * bsize;
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a = bytestream2_get_byte(gb);
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b = bytestream2_get_byte(gb);
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c = ((a & 0x3F) << 8) + b;
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mx = mvx + (c & 0x7F) - 64;
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my = mvy + (c >> 7) - 64;
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if (mvy < 0 || mvy >= h)
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return AVERROR_INVALIDDATA;
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if (mvx < 0 || mvx >= w)
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return AVERROR_INVALIDDATA;
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if (my < 0 || my >= h)
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return AVERROR_INVALIDDATA;
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if (mx < 0 || mx >= w)
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return AVERROR_INVALIDDATA;
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dst = (uint32_t *)frame->data[0] + mvx + l * mvy;
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src = (uint32_t *)frame->data[0] + mx + l * my;
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bsize_w = FFMIN3(bsize_w, w - mvx, w - mx);
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bsize_h = FFMIN3(bsize_h, h - mvy, h - my);
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if (mvy >= my && (mvy != my || mvx >= mx)) {
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src += (bsize_h - 1) * l;
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dst += (bsize_h - 1) * l;
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for (int by = 0; by < bsize_h; by++) {
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memmove(dst, src, bsize_w * 4);
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src -= l;
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dst -= l;
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}
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} else {
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for (int by = 0; by < bsize_h; by++) {
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memmove(dst, src, bsize_w * 4);
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src += l;
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dst += l;
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}
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}
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count--;
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}
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}
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break;
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case 12:
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osize = ((h + 3) / 4) * ((w + 3) / 4) + 7;
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bits = gb->buffer;
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di = 0;
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bcode = v14 = 0;
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if (bytestream2_get_bytes_left(gb) < osize >> 3)
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return AVERROR_INVALIDDATA;
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bytestream2_skip(gb, osize >> 3);
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for (int x = 0; x < w; x += 4) {
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for (int y = 0; y < h; y += 4) {
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int astate = 0;
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if (bits[di >> 3] & (1 << (di & 7))) {
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int codes = bytestream2_get_byte(gb);
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for (int count = 0; count < 4; count++) {
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uint32_t *src = (uint32_t *)frame->data[0];
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size_t src_size = l * (h - 1) + (w - 1);
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int nv, v, code = codes & 3;
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pos = x;
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dy = y + count;
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dst = (uint32_t *)frame->data[0] + pos + dy * l;
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if (code & 1)
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bcode = bytestream2_get_byte(gb);
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if (code == 3) {
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for (int j = 0; j < 4; j++) {
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switch (bcode & 3) {
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case 0:
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break;
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case 1:
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if (dy < 1 && !pos)
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return AVERROR_INVALIDDATA;
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dst[0] = dst[-1];
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break;
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case 2:
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if (dy < 1)
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return AVERROR_INVALIDDATA;
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dst[0] = dst[-l];
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break;
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case 3:
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if (astate) {
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nv = value >> 4;
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} else {
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value = bytestream2_get_byte(gb);
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nv = value & 0xF;
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}
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astate ^= 1;
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dst[0] = src[av_clip(l * (dy + s->mv1[nv][1]) + pos +
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s->mv1[nv][0], 0, src_size)];
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break;
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}
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bcode >>= 2;
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dst++;
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pos++;
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}
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} else if (code) {
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if (code == 1)
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v14 = bcode;
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else
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bcode = v14;
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for (int j = 0; j < 4; j++) {
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switch (bcode & 3) {
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case 0:
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break;
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|
case 1:
|
|
if (dy < 1 && !pos)
|
|
return AVERROR_INVALIDDATA;
|
|
dst[0] = dst[-1];
|
|
break;
|
|
case 2:
|
|
if (dy < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
dst[0] = dst[-l];
|
|
break;
|
|
case 3:
|
|
v = bytestream2_get_byte(gb);
|
|
if (v < 128) {
|
|
dst[0] = src[av_clip(l * (dy + s->mv0[v][1]) + pos +
|
|
s->mv0[v][0], 0, src_size)];
|
|
} else {
|
|
dst[0] = ((v & 0x7F) << 17) | bytestream2_get_be16(gb);
|
|
}
|
|
break;
|
|
}
|
|
|
|
bcode >>= 2;
|
|
dst++;
|
|
pos++;
|
|
}
|
|
}
|
|
|
|
codes >>= 2;
|
|
}
|
|
}
|
|
|
|
di++;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
static int decode_rle(AVCodecContext *avctx, AVFrame *frame)
|
|
{
|
|
ArgoContext *s = avctx->priv_data;
|
|
GetByteContext *gb = &s->gb;
|
|
const int w = frame->width;
|
|
const int h = frame->height;
|
|
const int l = frame->linesize[0];
|
|
uint8_t *dst = frame->data[0];
|
|
int pos = 0, y = 0;
|
|
|
|
while (bytestream2_get_bytes_left(gb) > 0) {
|
|
int count = bytestream2_get_byte(gb);
|
|
int pixel = bytestream2_get_byte(gb);
|
|
|
|
if (!count) {
|
|
pos += pixel;
|
|
while (pos >= w) {
|
|
pos -= w;
|
|
y++;
|
|
if (y >= h)
|
|
return 0;
|
|
}
|
|
} else {
|
|
while (count > 0) {
|
|
dst[pos + y * l] = pixel;
|
|
count--;
|
|
pos++;
|
|
if (pos >= w) {
|
|
pos = 0;
|
|
y++;
|
|
if (y >= h)
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
ArgoContext *s = avctx->priv_data;
|
|
GetByteContext *gb = &s->gb;
|
|
AVFrame *frame = s->frame;
|
|
uint32_t chunk;
|
|
int ret;
|
|
|
|
if (avpkt->size < 4)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
bytestream2_init(gb, avpkt->data, avpkt->size);
|
|
|
|
if ((ret = ff_reget_buffer(avctx, frame, 0)) < 0)
|
|
return ret;
|
|
|
|
chunk = bytestream2_get_be32(gb);
|
|
switch (chunk) {
|
|
case MKBETAG('P', 'A', 'L', '8'):
|
|
for (int y = 0; y < frame->height; y++)
|
|
memset(frame->data[0] + y * frame->linesize[0], 0, frame->width * s->bpp);
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
|
|
memset(frame->data[1], 0, AVPALETTE_SIZE);
|
|
return decode_pal8(avctx, s->pal);
|
|
case MKBETAG('M', 'A', 'D', '1'):
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
|
|
ret = decode_mad1(avctx, frame);
|
|
else
|
|
ret = decode_mad1_24(avctx, frame);
|
|
break;
|
|
case MKBETAG('A', 'V', 'C', 'F'):
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
|
s->key = 1;
|
|
ret = decode_avcf(avctx, frame);
|
|
break;
|
|
}
|
|
case MKBETAG('A', 'L', 'C', 'D'):
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
|
s->key = 0;
|
|
ret = decode_alcd(avctx, frame);
|
|
break;
|
|
}
|
|
case MKBETAG('R', 'L', 'E', 'F'):
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
|
s->key = 1;
|
|
ret = decode_rle(avctx, frame);
|
|
break;
|
|
}
|
|
case MKBETAG('R', 'L', 'E', 'D'):
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
|
s->key = 0;
|
|
ret = decode_rle(avctx, frame);
|
|
break;
|
|
}
|
|
default:
|
|
av_log(avctx, AV_LOG_DEBUG, "unknown chunk 0x%X\n", chunk);
|
|
break;
|
|
}
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
|
|
memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
|
|
|
|
if ((ret = av_frame_ref(data, s->frame)) < 0)
|
|
return ret;
|
|
|
|
frame->pict_type = s->key ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
|
|
frame->key_frame = s->key;
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
ArgoContext *s = avctx->priv_data;
|
|
|
|
switch (avctx->bits_per_coded_sample) {
|
|
case 8: s->bpp = 1;
|
|
avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
|
|
case 24: s->bpp = 4;
|
|
avctx->pix_fmt = AV_PIX_FMT_BGR0; break;
|
|
default: avpriv_request_sample(s, "depth == %u", avctx->bits_per_coded_sample);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (avctx->width % 2 || avctx->height % 2) {
|
|
avpriv_request_sample(s, "Odd dimensions\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
s->frame = av_frame_alloc();
|
|
if (!s->frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (int n = 0, i = -4; i < 4; i++) {
|
|
for (int j = -14; j < 2; j++) {
|
|
s->mv0[n][0] = j;
|
|
s->mv0[n++][1] = i;
|
|
}
|
|
}
|
|
|
|
for (int n = 0, i = -5; i <= 1; i += 2) {
|
|
int j = -5;
|
|
|
|
while (j <= 1) {
|
|
s->mv1[n][0] = j;
|
|
s->mv1[n++][1] = i;
|
|
j += 2;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void decode_flush(AVCodecContext *avctx)
|
|
{
|
|
ArgoContext *s = avctx->priv_data;
|
|
|
|
av_frame_unref(s->frame);
|
|
}
|
|
|
|
static av_cold int decode_close(AVCodecContext *avctx)
|
|
{
|
|
ArgoContext *s = avctx->priv_data;
|
|
|
|
av_frame_free(&s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFCodec ff_argo_decoder = {
|
|
.p.name = "argo",
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games Video"),
|
|
.p.type = AVMEDIA_TYPE_VIDEO,
|
|
.p.id = AV_CODEC_ID_ARGO,
|
|
.priv_data_size = sizeof(ArgoContext),
|
|
.init = decode_init,
|
|
.decode = decode_frame,
|
|
.flush = decode_flush,
|
|
.close = decode_close,
|
|
.p.capabilities = AV_CODEC_CAP_DR1,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|