| /* |
| * 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] / 4; |
| 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_raw_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_raw_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; |
| } |
| |
| 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_CLEANUP, |
| }; |
