mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
1bed27acef
Fixes: Timeout Fixes: 45052/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ARGO_fuzzer-6033489206575104 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
748 lines
24 KiB
C
748 lines
24 KiB
C
/*
|
|
* 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 "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] = (0xFFU << 24) | 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;
|
|
|
|
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 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,
|
|
};
|