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FFmpeg/libavcodec/argo.c

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/*
* Argonaut Games Video decoder
* Copyright (c) 2020 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
typedef struct ArgoContext {
GetByteContext gb;
int bpp;
int key;
int mv0[128][2];
int mv1[16][2];
uint32_t pal[256];
AVFrame *frame;
} ArgoContext;
static int decode_pal8(AVCodecContext *avctx, uint32_t *pal)
{
ArgoContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb;
int start, count;
start = bytestream2_get_le16(gb);
count = bytestream2_get_le16(gb);
if (start + count > 256)
return AVERROR_INVALIDDATA;
if (bytestream2_get_bytes_left(gb) < 3 * count)
return AVERROR_INVALIDDATA;
for (int i = 0; i < count; i++)
pal[start + i] = (0xFF << 24U) | bytestream2_get_be24u(gb);
return 0;
}
static int decode_avcf(AVCodecContext *avctx, AVFrame *frame)
{
ArgoContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb;
const int l = frame->linesize[0];
const uint8_t *map = gb->buffer;
uint8_t *dst = frame->data[0];
if (bytestream2_get_bytes_left(gb) < 1024 + (frame->width / 2) * (frame->height / 2))
return AVERROR_INVALIDDATA;
bytestream2_skipu(gb, 1024);
for (int y = 0; y < frame->height; y += 2) {
for (int x = 0; x < frame->width; x += 2) {
int index = bytestream2_get_byteu(gb);
const uint8_t *block = map + index * 4;
dst[x+0] = block[0];
dst[x+1] = block[1];
dst[x+l] = block[2];
dst[x+l+1] = block[3];
}
dst += frame->linesize[0] * 2;
}
return 0;
}
static int decode_alcd(AVCodecContext *avctx, AVFrame *frame)
{
ArgoContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb;
GetByteContext sb;
const int l = frame->linesize[0];
const uint8_t *map = gb->buffer;
uint8_t *dst = frame->data[0];
uint8_t codes = 0;
int count = 0;
if (bytestream2_get_bytes_left(gb) < 1024 + (((frame->width / 2) * (frame->height / 2) + 7) >> 3))
return AVERROR_INVALIDDATA;
bytestream2_skipu(gb, 1024);
sb = *gb;
bytestream2_skipu(gb, ((frame->width / 2) * (frame->height / 2) + 7) >> 3);
for (int y = 0; y < frame->height; y += 2) {
for (int x = 0; x < frame->width; x += 2) {
const uint8_t *block;
int index;
if (count == 0) {
codes = bytestream2_get_byteu(&sb);
count = 8;
}
if (codes & 0x80) {
index = bytestream2_get_byte(gb);
block = map + index * 4;
dst[x+0] = block[0];
dst[x+1] = block[1];
dst[x+l] = block[2];
dst[x+l+1] = block[3];
}
codes <<= 1;
count--;
}
dst += frame->linesize[0] * 2;
}
return 0;
}
static int decode_mad1(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];
while (bytestream2_get_bytes_left(gb) > 0) {
int size, type, pos, dy;
uint8_t *dst;
type = bytestream2_get_byte(gb);
if (type == 0xFF)
break;
switch (type) {
case 8:
dst = frame->data[0];
for (int y = 0; y < h; y += 8) {
for (int x = 0; x < w; x += 8) {
int fill = bytestream2_get_byte(gb);
uint8_t *ddst = dst + x;
for (int by = 0; by < 8; by++) {
memset(ddst, fill, 8);
ddst += l;
}
}
dst += 8 * l;
}
break;
case 7:
while (bytestream2_get_bytes_left(gb) > 0) {
int bsize = bytestream2_get_byte(gb);
uint8_t *src;
int count;
if (!bsize)
break;
count = bytestream2_get_be16(gb);
while (count > 0) {
int mvx, mvy, a, b, c, mx, my;
int bsize_w, bsize_h;
bsize_w = bsize_h = bsize;
if (bytestream2_get_bytes_left(gb) < 4)
return AVERROR_INVALIDDATA;
mvx = bytestream2_get_byte(gb) * bsize;
mvy = bytestream2_get_byte(gb) * bsize;
a = bytestream2_get_byte(gb);
b = bytestream2_get_byte(gb);
c = ((a & 0x3F) << 8) + b;
mx = mvx + (c & 0x7F) - 64;
my = mvy + (c >> 7) - 64;
if (mvy < 0 || mvy >= h)
return AVERROR_INVALIDDATA;
if (mvx < 0 || mvx >= w)
return AVERROR_INVALIDDATA;
if (my < 0 || my >= h)
return AVERROR_INVALIDDATA;
if (mx < 0 || mx >= w)
return AVERROR_INVALIDDATA;
dst = frame->data[0] + mvx + l * mvy;
src = frame->data[0] + mx + l * my;
bsize_w = FFMIN3(bsize_w, w - mvx, w - mx);
bsize_h = FFMIN3(bsize_h, h - mvy, h - my);
if (mvy >= my && (mvy != my || mvx >= mx)) {
src += (bsize_h - 1) * l;
dst += (bsize_h - 1) * l;
for (int by = 0; by < bsize_h; by++) {
memmove(dst, src, bsize_w);
src -= l;
dst -= l;
}
} else {
for (int by = 0; by < bsize_h; by++) {
memmove(dst, src, bsize_w);
src += l;
dst += l;
}
}
count--;
}
}
break;
case 6:
dst = frame->data[0];
if (bytestream2_get_bytes_left(gb) < w * h)
return AVERROR_INVALIDDATA;
for (int y = 0; y < h; y++) {
bytestream2_get_bufferu(gb, dst, w);
dst += l;
}
break;
case 5:
dst = frame->data[0];
for (int y = 0; y < h; y += 2) {
for (int x = 0; x < w; x += 2) {
int fill = bytestream2_get_byte(gb);
uint8_t *ddst = dst + x;
fill = (fill << 8) | fill;
for (int by = 0; by < 2; by++) {
AV_WN16(ddst, fill);
ddst += l;
}
}
dst += 2 * l;
}
break;
case 3:
size = bytestream2_get_le16(gb);
if (size > 0) {
int x = bytestream2_get_byte(gb) * 4;
int y = bytestream2_get_byte(gb) * 4;
int count = bytestream2_get_byte(gb);
int fill = bytestream2_get_byte(gb);
av_log(avctx, AV_LOG_DEBUG, "%d %d %d %d\n", x, y, count, fill);
for (int i = 0; i < count; i++)
;
return AVERROR_PATCHWELCOME;
}
break;
case 2:
dst = frame->data[0];
pos = 0;
dy = 0;
while (bytestream2_get_bytes_left(gb) > 0) {
int count = bytestream2_get_byteu(gb);
int skip = count & 0x3F;
count = count >> 6;
if (skip == 0x3F) {
pos += 0x3E;
while (pos >= w) {
pos -= w;
dst += l;
dy++;
if (dy >= h)
return 0;
}
} else {
pos += skip;
while (pos >= w) {
pos -= w;
dst += l;
dy++;
if (dy >= h)
return 0;
}
while (count >= 0) {
int bits = bytestream2_get_byte(gb);
for (int i = 0; i < 4; i++) {
switch (bits & 3) {
case 0:
break;
case 1:
if (dy < 1 && !pos)
return AVERROR_INVALIDDATA;
else
dst[pos] = pos ? dst[pos - 1] : dst[-l + w - 1];
break;
case 2:
if (dy < 1)
return AVERROR_INVALIDDATA;
dst[pos] = dst[pos - l];
break;
case 3:
dst[pos] = bytestream2_get_byte(gb);
break;
}
pos++;
if (pos >= w) {
pos -= w;
dst += l;
dy++;
if (dy >= h)
return 0;
}
bits >>= 2;
}
count--;
}
}
}
break;
default:
return AVERROR_INVALIDDATA;
}
}
return 0;
}
static int decode_mad1_24(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] / 4;
while (bytestream2_get_bytes_left(gb) > 0) {
int osize, type, pos, dy, di, bcode, value, v14;
const uint8_t *bits;
uint32_t *dst;
type = bytestream2_get_byte(gb);
if (type == 0xFF)
return 0;
switch (type) {
case 8:
dst = (uint32_t *)frame->data[0];
for (int y = 0; y + 12 <= h; y += 12) {
for (int x = 0; x + 12 <= w; x += 12) {
int fill = bytestream2_get_be24(gb);
uint32_t *dstp = dst + x;
for (int by = 0; by < 12; by++) {
for (int bx = 0; bx < 12; bx++)
dstp[bx] = fill;
dstp += l;
}
}
dst += 12 * l;
}
break;
case 7:
while (bytestream2_get_bytes_left(gb) > 0) {
int bsize = bytestream2_get_byte(gb);
uint32_t *src;
int count;
if (!bsize)
break;
count = bytestream2_get_be16(gb);
while (count > 0) {
int mvx, mvy, a, b, c, mx, my;
int bsize_w, bsize_h;
bsize_w = bsize_h = bsize;
if (bytestream2_get_bytes_left(gb) < 4)
return AVERROR_INVALIDDATA;
mvx = bytestream2_get_byte(gb) * bsize;
mvy = bytestream2_get_byte(gb) * bsize;
a = bytestream2_get_byte(gb);
b = bytestream2_get_byte(gb);
c = ((a & 0x3F) << 8) + b;
mx = mvx + (c & 0x7F) - 64;
my = mvy + (c >> 7) - 64;
if (mvy < 0 || mvy >= h)
return AVERROR_INVALIDDATA;
if (mvx < 0 || mvx >= w)
return AVERROR_INVALIDDATA;
if (my < 0 || my >= h)
return AVERROR_INVALIDDATA;
if (mx < 0 || mx >= w)
return AVERROR_INVALIDDATA;
dst = (uint32_t *)frame->data[0] + mvx + l * mvy;
src = (uint32_t *)frame->data[0] + mx + l * my;
bsize_w = FFMIN3(bsize_w, w - mvx, w - mx);
bsize_h = FFMIN3(bsize_h, h - mvy, h - my);
if (mvy >= my && (mvy != my || mvx >= mx)) {
src += (bsize_h - 1) * l;
dst += (bsize_h - 1) * l;
for (int by = 0; by < bsize_h; by++) {
memmove(dst, src, bsize_w * 4);
src -= l;
dst -= l;
}
} else {
for (int by = 0; by < bsize_h; by++) {
memmove(dst, src, bsize_w * 4);
src += l;
dst += l;
}
}
count--;
}
}
break;
case 12:
osize = ((h + 3) / 4) * ((w + 3) / 4) + 7;
bits = gb->buffer;
di = 0;
bcode = v14 = 0;
if (bytestream2_get_bytes_left(gb) < osize >> 3)
return AVERROR_INVALIDDATA;
bytestream2_skip(gb, osize >> 3);
for (int x = 0; x < w; x += 4) {
for (int y = 0; y < h; y += 4) {
int astate = 0;
if (bits[di >> 3] & (1 << (di & 7))) {
int codes = bytestream2_get_byte(gb);
for (int count = 0; count < 4; count++) {
uint32_t *src = (uint32_t *)frame->data[0];
size_t src_size = l * (h - 1) + (w - 1);
int nv, v, code = codes & 3;
pos = x;
dy = y + count;
dst = (uint32_t *)frame->data[0] + pos + dy * l;
if (code & 1)
bcode = bytestream2_get_byte(gb);
if (code == 3) {
for (int j = 0; j < 4; j++) {
switch (bcode & 3) {
case 0:
break;
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:
if (astate) {
nv = value >> 4;
} else {
value = bytestream2_get_byte(gb);
nv = value & 0xF;
}
astate ^= 1;
dst[0] = src[av_clip(l * (dy + s->mv1[nv][1]) + pos +
s->mv1[nv][0], 0, src_size)];
break;
}
bcode >>= 2;
dst++;
pos++;
}
} else if (code) {
if (code == 1)
v14 = bcode;
else
bcode = v14;
for (int j = 0; j < 4; j++) {
switch (bcode & 3) {
case 0:
break;
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;
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;
}
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 AVCodec ff_argo_decoder = {
.name = "argo",
.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games Video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_ARGO,
.priv_data_size = sizeof(ArgoContext),
.init = decode_init,
.decode = decode_frame,
.flush = decode_flush,
.close = decode_close,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};