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https://gitee.com/openharmony/third_party_ffmpeg
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1111 lines
32 KiB
C
1111 lines
32 KiB
C
/*
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* Interplay MVE Video Decoder
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* Copyright (C) 2003 the ffmpeg project
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file
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* Interplay MVE Video Decoder by Mike Melanson (melanson@pcisys.net)
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* For more information about the Interplay MVE format, visit:
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* http://www.pcisys.net/~melanson/codecs/interplay-mve.txt
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* This code is written in such a way that the identifiers match up
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* with the encoding descriptions in the document.
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*
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* This decoder presently only supports a PAL8 output colorspace.
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*
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* An Interplay video frame consists of 2 parts: The decoding map and
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* the video data. A demuxer must load these 2 parts together in a single
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* buffer before sending it through the stream to this decoder.
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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 "avcodec.h"
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#include "bytestream.h"
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#include "dsputil.h"
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#define ALT_BITSTREAM_READER_LE
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#include "get_bits.h"
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#define PALETTE_COUNT 256
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/* debugging support */
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#define DEBUG_INTERPLAY 0
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#if DEBUG_INTERPLAY
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#define debug_interplay(x,...) av_log(NULL, AV_LOG_DEBUG, x, __VA_ARGS__)
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#else
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static inline void debug_interplay(const char *format, ...) { }
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#endif
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typedef struct IpvideoContext {
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AVCodecContext *avctx;
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DSPContext dsp;
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AVFrame second_last_frame;
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AVFrame last_frame;
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AVFrame current_frame;
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const unsigned char *decoding_map;
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int decoding_map_size;
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const unsigned char *buf;
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int size;
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int is_16bpp;
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const unsigned char *stream_ptr;
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const unsigned char *stream_end;
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const uint8_t *mv_ptr;
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const uint8_t *mv_end;
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unsigned char *pixel_ptr;
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int line_inc;
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int stride;
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int upper_motion_limit_offset;
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uint32_t pal[256];
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} IpvideoContext;
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#define CHECK_STREAM_PTR(stream_ptr, stream_end, n) \
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if (stream_end - stream_ptr < n) { \
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av_log(s->avctx, AV_LOG_ERROR, "Interplay video warning: stream_ptr out of bounds (%p >= %p)\n", \
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stream_ptr + n, stream_end); \
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return -1; \
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}
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static int copy_from(IpvideoContext *s, AVFrame *src, int delta_x, int delta_y)
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{
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int current_offset = s->pixel_ptr - s->current_frame.data[0];
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int motion_offset = current_offset + delta_y * s->current_frame.linesize[0]
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+ delta_x * (1 + s->is_16bpp);
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if (motion_offset < 0) {
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av_log(s->avctx, AV_LOG_ERROR, " Interplay video: motion offset < 0 (%d)\n", motion_offset);
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return -1;
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} else if (motion_offset > s->upper_motion_limit_offset) {
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av_log(s->avctx, AV_LOG_ERROR, " Interplay video: motion offset above limit (%d >= %d)\n",
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motion_offset, s->upper_motion_limit_offset);
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return -1;
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}
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if (src->data[0] == NULL) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n");
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return AVERROR(EINVAL);
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}
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s->dsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset,
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s->current_frame.linesize[0], 8);
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return 0;
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}
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static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s)
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{
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return copy_from(s, &s->last_frame, 0, 0);
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}
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static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s)
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{
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return copy_from(s, &s->second_last_frame, 0, 0);
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}
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static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s)
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{
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unsigned char B;
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int x, y;
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/* copy block from 2 frames ago using a motion vector; need 1 more byte */
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if (!s->is_16bpp) {
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
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B = *s->stream_ptr++;
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} else {
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CHECK_STREAM_PTR(s->mv_ptr, s->mv_end, 1);
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B = *s->mv_ptr++;
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}
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if (B < 56) {
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x = 8 + (B % 7);
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y = B / 7;
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} else {
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x = -14 + ((B - 56) % 29);
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y = 8 + ((B - 56) / 29);
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}
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debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
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return copy_from(s, &s->second_last_frame, x, y);
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}
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static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s)
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{
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unsigned char B;
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int x, y;
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/* copy 8x8 block from current frame from an up/left block */
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/* need 1 more byte for motion */
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if (!s->is_16bpp) {
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
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B = *s->stream_ptr++;
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} else {
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CHECK_STREAM_PTR(s->mv_ptr, s->mv_end, 1);
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B = *s->mv_ptr++;
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}
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if (B < 56) {
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x = -(8 + (B % 7));
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y = -(B / 7);
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} else {
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x = -(-14 + ((B - 56) % 29));
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y = -( 8 + ((B - 56) / 29));
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}
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debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
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return copy_from(s, &s->current_frame, x, y);
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}
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static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s)
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{
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int x, y;
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unsigned char B, BL, BH;
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/* copy a block from the previous frame; need 1 more byte */
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if (!s->is_16bpp) {
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
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B = *s->stream_ptr++;
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} else {
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CHECK_STREAM_PTR(s->mv_ptr, s->mv_end, 1);
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B = *s->mv_ptr++;
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}
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BL = B & 0x0F;
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BH = (B >> 4) & 0x0F;
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x = -8 + BL;
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y = -8 + BH;
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debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
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return copy_from(s, &s->last_frame, x, y);
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}
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static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s)
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{
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signed char x, y;
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/* copy a block from the previous frame using an expanded range;
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* need 2 more bytes */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
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x = *s->stream_ptr++;
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y = *s->stream_ptr++;
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debug_interplay (" motion bytes = %d, %d\n", x, y);
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return copy_from(s, &s->last_frame, x, y);
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}
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static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s)
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{
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/* mystery opcode? skip multiple blocks? */
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av_log(s->avctx, AV_LOG_ERROR, " Interplay video: Help! Mystery opcode 0x6 seen\n");
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/* report success */
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return 0;
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}
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static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s)
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{
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int x, y;
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unsigned char P[2];
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unsigned int flags;
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/* 2-color encoding */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
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P[0] = *s->stream_ptr++;
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P[1] = *s->stream_ptr++;
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if (P[0] <= P[1]) {
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/* need 8 more bytes from the stream */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
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for (y = 0; y < 8; y++) {
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flags = *s->stream_ptr++ | 0x100;
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for (; flags != 1; flags >>= 1)
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*s->pixel_ptr++ = P[flags & 1];
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s->pixel_ptr += s->line_inc;
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}
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} else {
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/* need 2 more bytes from the stream */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
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flags = bytestream_get_le16(&s->stream_ptr);
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for (y = 0; y < 8; y += 2) {
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for (x = 0; x < 8; x += 2, flags >>= 1) {
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s->pixel_ptr[x ] =
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s->pixel_ptr[x + 1 ] =
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s->pixel_ptr[x + s->stride] =
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s->pixel_ptr[x + 1 + s->stride] = P[flags & 1];
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}
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s->pixel_ptr += s->stride * 2;
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}
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}
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/* report success */
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return 0;
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}
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static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s)
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{
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int x, y;
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unsigned char P[2];
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unsigned int flags = 0;
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/* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
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* either top and bottom or left and right halves */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
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P[0] = *s->stream_ptr++;
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P[1] = *s->stream_ptr++;
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if (P[0] <= P[1]) {
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 14);
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s->stream_ptr -= 2;
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for (y = 0; y < 16; y++) {
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// new values for each 4x4 block
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if (!(y & 3)) {
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P[0] = *s->stream_ptr++; P[1] = *s->stream_ptr++;
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flags = bytestream_get_le16(&s->stream_ptr);
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}
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for (x = 0; x < 4; x++, flags >>= 1)
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*s->pixel_ptr++ = P[flags & 1];
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s->pixel_ptr += s->stride - 4;
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// switch to right half
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if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
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}
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} else {
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/* need 10 more bytes */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 10);
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if (s->stream_ptr[4] <= s->stream_ptr[5]) {
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flags = bytestream_get_le32(&s->stream_ptr);
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/* vertical split; left & right halves are 2-color encoded */
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for (y = 0; y < 16; y++) {
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for (x = 0; x < 4; x++, flags >>= 1)
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*s->pixel_ptr++ = P[flags & 1];
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s->pixel_ptr += s->stride - 4;
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// switch to right half
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if (y == 7) {
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s->pixel_ptr -= 8 * s->stride - 4;
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P[0] = *s->stream_ptr++; P[1] = *s->stream_ptr++;
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flags = bytestream_get_le32(&s->stream_ptr);
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}
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}
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} else {
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/* horizontal split; top & bottom halves are 2-color encoded */
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for (y = 0; y < 8; y++) {
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if (y == 4) {
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P[0] = *s->stream_ptr++;
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P[1] = *s->stream_ptr++;
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}
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flags = *s->stream_ptr++ | 0x100;
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for (; flags != 1; flags >>= 1)
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*s->pixel_ptr++ = P[flags & 1];
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s->pixel_ptr += s->line_inc;
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}
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}
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}
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/* report success */
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return 0;
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}
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static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s)
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{
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int x, y;
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unsigned char P[4];
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/* 4-color encoding */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
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memcpy(P, s->stream_ptr, 4);
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s->stream_ptr += 4;
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if (P[0] <= P[1]) {
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if (P[2] <= P[3]) {
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/* 1 of 4 colors for each pixel, need 16 more bytes */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 16);
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for (y = 0; y < 8; y++) {
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/* get the next set of 8 2-bit flags */
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int flags = bytestream_get_le16(&s->stream_ptr);
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for (x = 0; x < 8; x++, flags >>= 2)
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*s->pixel_ptr++ = P[flags & 0x03];
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s->pixel_ptr += s->line_inc;
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}
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} else {
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uint32_t flags;
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/* 1 of 4 colors for each 2x2 block, need 4 more bytes */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
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flags = bytestream_get_le32(&s->stream_ptr);
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for (y = 0; y < 8; y += 2) {
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for (x = 0; x < 8; x += 2, flags >>= 2) {
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s->pixel_ptr[x ] =
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s->pixel_ptr[x + 1 ] =
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s->pixel_ptr[x + s->stride] =
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s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
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}
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s->pixel_ptr += s->stride * 2;
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}
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}
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} else {
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uint64_t flags;
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/* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
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flags = bytestream_get_le64(&s->stream_ptr);
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if (P[2] <= P[3]) {
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for (y = 0; y < 8; y++) {
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for (x = 0; x < 8; x += 2, flags >>= 2) {
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s->pixel_ptr[x ] =
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s->pixel_ptr[x + 1] = P[flags & 0x03];
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}
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s->pixel_ptr += s->stride;
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}
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} else {
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for (y = 0; y < 8; y += 2) {
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for (x = 0; x < 8; x++, flags >>= 2) {
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s->pixel_ptr[x ] =
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s->pixel_ptr[x + s->stride] = P[flags & 0x03];
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}
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s->pixel_ptr += s->stride * 2;
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}
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}
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}
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/* report success */
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return 0;
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}
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static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s)
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{
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int x, y;
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unsigned char P[4];
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int flags = 0;
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/* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
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* either top and bottom or left and right halves */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 24);
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if (s->stream_ptr[0] <= s->stream_ptr[1]) {
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/* 4-color encoding for each quadrant; need 32 bytes */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 32);
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for (y = 0; y < 16; y++) {
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// new values for each 4x4 block
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if (!(y & 3)) {
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memcpy(P, s->stream_ptr, 4);
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s->stream_ptr += 4;
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flags = bytestream_get_le32(&s->stream_ptr);
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}
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for (x = 0; x < 4; x++, flags >>= 2)
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*s->pixel_ptr++ = P[flags & 0x03];
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s->pixel_ptr += s->stride - 4;
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// switch to right half
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if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
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}
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} else {
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// vertical split?
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int vert = s->stream_ptr[12] <= s->stream_ptr[13];
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uint64_t flags = 0;
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/* 4-color encoding for either left and right or top and bottom
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* halves */
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for (y = 0; y < 16; y++) {
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// load values for each half
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if (!(y & 7)) {
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memcpy(P, s->stream_ptr, 4);
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s->stream_ptr += 4;
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flags = bytestream_get_le64(&s->stream_ptr);
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}
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for (x = 0; x < 4; x++, flags >>= 2)
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*s->pixel_ptr++ = P[flags & 0x03];
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if (vert) {
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s->pixel_ptr += s->stride - 4;
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// switch to right half
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if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
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} else if (y & 1) s->pixel_ptr += s->line_inc;
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}
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}
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/* report success */
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return 0;
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}
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static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s)
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{
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int y;
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/* 64-color encoding (each pixel in block is a different color) */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 64);
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for (y = 0; y < 8; y++) {
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memcpy(s->pixel_ptr, s->stream_ptr, 8);
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s->stream_ptr += 8;
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s->pixel_ptr += s->stride;
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}
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/* report success */
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return 0;
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}
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static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s)
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{
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int x, y;
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/* 16-color block encoding: each 2x2 block is a different color */
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CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 16);
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|
for (y = 0; y < 8; y += 2) {
|
|
for (x = 0; x < 8; x += 2) {
|
|
s->pixel_ptr[x ] =
|
|
s->pixel_ptr[x + 1 ] =
|
|
s->pixel_ptr[x + s->stride] =
|
|
s->pixel_ptr[x + 1 + s->stride] = *s->stream_ptr++;
|
|
}
|
|
s->pixel_ptr += s->stride * 2;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s)
|
|
{
|
|
int y;
|
|
unsigned char P[2];
|
|
|
|
/* 4-color block encoding: each 4x4 block is a different color */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
if (!(y & 3)) {
|
|
P[0] = *s->stream_ptr++;
|
|
P[1] = *s->stream_ptr++;
|
|
}
|
|
memset(s->pixel_ptr, P[0], 4);
|
|
memset(s->pixel_ptr + 4, P[1], 4);
|
|
s->pixel_ptr += s->stride;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s)
|
|
{
|
|
int y;
|
|
unsigned char pix;
|
|
|
|
/* 1-color encoding: the whole block is 1 solid color */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
|
|
pix = *s->stream_ptr++;
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
memset(s->pixel_ptr, pix, 8);
|
|
s->pixel_ptr += s->stride;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xF(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
unsigned char sample[2];
|
|
|
|
/* dithered encoding */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
|
|
sample[0] = *s->stream_ptr++;
|
|
sample[1] = *s->stream_ptr++;
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
for (x = 0; x < 8; x += 2) {
|
|
*s->pixel_ptr++ = sample[ y & 1 ];
|
|
*s->pixel_ptr++ = sample[!(y & 1)];
|
|
}
|
|
s->pixel_ptr += s->line_inc;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s)
|
|
{
|
|
signed char x, y;
|
|
|
|
/* copy a block from the second last frame using an expanded range */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
|
|
|
|
x = *s->stream_ptr++;
|
|
y = *s->stream_ptr++;
|
|
|
|
debug_interplay (" motion bytes = %d, %d\n", x, y);
|
|
return copy_from(s, &s->second_last_frame, x, y);
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t P[2];
|
|
unsigned int flags;
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 2-color encoding */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
|
|
|
|
P[0] = bytestream_get_le16(&s->stream_ptr);
|
|
P[1] = bytestream_get_le16(&s->stream_ptr);
|
|
|
|
if (!(P[0] & 0x8000)) {
|
|
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
flags = *s->stream_ptr++ | 0x100;
|
|
for (; flags != 1; flags >>= 1)
|
|
*pixel_ptr++ = P[flags & 1];
|
|
pixel_ptr += s->line_inc;
|
|
}
|
|
|
|
} else {
|
|
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
|
|
|
|
flags = bytestream_get_le16(&s->stream_ptr);
|
|
for (y = 0; y < 8; y += 2) {
|
|
for (x = 0; x < 8; x += 2, flags >>= 1) {
|
|
pixel_ptr[x ] =
|
|
pixel_ptr[x + 1 ] =
|
|
pixel_ptr[x + s->stride] =
|
|
pixel_ptr[x + 1 + s->stride] = P[flags & 1];
|
|
}
|
|
pixel_ptr += s->stride * 2;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t P[2];
|
|
unsigned int flags = 0;
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
|
|
* either top and bottom or left and right halves */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
|
|
|
|
P[0] = bytestream_get_le16(&s->stream_ptr);
|
|
P[1] = bytestream_get_le16(&s->stream_ptr);
|
|
|
|
if (!(P[0] & 0x8000)) {
|
|
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 24);
|
|
s->stream_ptr -= 4;
|
|
|
|
for (y = 0; y < 16; y++) {
|
|
// new values for each 4x4 block
|
|
if (!(y & 3)) {
|
|
P[0] = bytestream_get_le16(&s->stream_ptr);
|
|
P[1] = bytestream_get_le16(&s->stream_ptr);
|
|
flags = bytestream_get_le16(&s->stream_ptr);
|
|
}
|
|
|
|
for (x = 0; x < 4; x++, flags >>= 1)
|
|
*pixel_ptr++ = P[flags & 1];
|
|
pixel_ptr += s->stride - 4;
|
|
// switch to right half
|
|
if (y == 7) pixel_ptr -= 8 * s->stride - 4;
|
|
}
|
|
|
|
} else {
|
|
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 12);
|
|
|
|
if (!(AV_RL16(s->stream_ptr + 4) & 0x8000)) {
|
|
|
|
flags = bytestream_get_le32(&s->stream_ptr);
|
|
|
|
/* vertical split; left & right halves are 2-color encoded */
|
|
|
|
for (y = 0; y < 16; y++) {
|
|
for (x = 0; x < 4; x++, flags >>= 1)
|
|
*pixel_ptr++ = P[flags & 1];
|
|
pixel_ptr += s->stride - 4;
|
|
// switch to right half
|
|
if (y == 7) {
|
|
pixel_ptr -= 8 * s->stride - 4;
|
|
P[0] = bytestream_get_le16(&s->stream_ptr);
|
|
P[1] = bytestream_get_le16(&s->stream_ptr);
|
|
flags = bytestream_get_le32(&s->stream_ptr);
|
|
}
|
|
}
|
|
|
|
} else {
|
|
|
|
/* horizontal split; top & bottom halves are 2-color encoded */
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
if (y == 4) {
|
|
P[0] = bytestream_get_le16(&s->stream_ptr);
|
|
P[1] = bytestream_get_le16(&s->stream_ptr);
|
|
}
|
|
flags = *s->stream_ptr++ | 0x100;
|
|
|
|
for (; flags != 1; flags >>= 1)
|
|
*pixel_ptr++ = P[flags & 1];
|
|
pixel_ptr += s->line_inc;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0x9_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t P[4];
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 4-color encoding */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
|
|
|
|
for (x = 0; x < 4; x++)
|
|
P[x] = bytestream_get_le16(&s->stream_ptr);
|
|
|
|
if (!(P[0] & 0x8000)) {
|
|
if (!(P[2] & 0x8000)) {
|
|
|
|
/* 1 of 4 colors for each pixel */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 16);
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
/* get the next set of 8 2-bit flags */
|
|
int flags = bytestream_get_le16(&s->stream_ptr);
|
|
for (x = 0; x < 8; x++, flags >>= 2)
|
|
*pixel_ptr++ = P[flags & 0x03];
|
|
pixel_ptr += s->line_inc;
|
|
}
|
|
|
|
} else {
|
|
uint32_t flags;
|
|
|
|
/* 1 of 4 colors for each 2x2 block */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
|
|
|
|
flags = bytestream_get_le32(&s->stream_ptr);
|
|
|
|
for (y = 0; y < 8; y += 2) {
|
|
for (x = 0; x < 8; x += 2, flags >>= 2) {
|
|
pixel_ptr[x ] =
|
|
pixel_ptr[x + 1 ] =
|
|
pixel_ptr[x + s->stride] =
|
|
pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
|
|
}
|
|
pixel_ptr += s->stride * 2;
|
|
}
|
|
|
|
}
|
|
} else {
|
|
uint64_t flags;
|
|
|
|
/* 1 of 4 colors for each 2x1 or 1x2 block */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
|
|
|
|
flags = bytestream_get_le64(&s->stream_ptr);
|
|
if (!(P[2] & 0x8000)) {
|
|
for (y = 0; y < 8; y++) {
|
|
for (x = 0; x < 8; x += 2, flags >>= 2) {
|
|
pixel_ptr[x ] =
|
|
pixel_ptr[x + 1] = P[flags & 0x03];
|
|
}
|
|
pixel_ptr += s->stride;
|
|
}
|
|
} else {
|
|
for (y = 0; y < 8; y += 2) {
|
|
for (x = 0; x < 8; x++, flags >>= 2) {
|
|
pixel_ptr[x ] =
|
|
pixel_ptr[x + s->stride] = P[flags & 0x03];
|
|
}
|
|
pixel_ptr += s->stride * 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t P[4];
|
|
int flags = 0;
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
|
|
* either top and bottom or left and right halves */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 24);
|
|
|
|
if (!(AV_RL16(s->stream_ptr) & 0x8000)) {
|
|
|
|
/* 4-color encoding for each quadrant */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 48);
|
|
|
|
for (y = 0; y < 16; y++) {
|
|
// new values for each 4x4 block
|
|
if (!(y & 3)) {
|
|
for (x = 0; x < 4; x++)
|
|
P[x] = bytestream_get_le16(&s->stream_ptr);
|
|
flags = bytestream_get_le32(&s->stream_ptr);
|
|
}
|
|
|
|
for (x = 0; x < 4; x++, flags >>= 2)
|
|
*pixel_ptr++ = P[flags & 0x03];
|
|
|
|
pixel_ptr += s->stride - 4;
|
|
// switch to right half
|
|
if (y == 7) pixel_ptr -= 8 * s->stride - 4;
|
|
}
|
|
|
|
} else {
|
|
// vertical split?
|
|
int vert = !(AV_RL16(s->stream_ptr + 16) & 0x8000);
|
|
uint64_t flags = 0;
|
|
|
|
/* 4-color encoding for either left and right or top and bottom
|
|
* halves */
|
|
|
|
for (y = 0; y < 16; y++) {
|
|
// load values for each half
|
|
if (!(y & 7)) {
|
|
for (x = 0; x < 4; x++)
|
|
P[x] = bytestream_get_le16(&s->stream_ptr);
|
|
flags = bytestream_get_le64(&s->stream_ptr);
|
|
}
|
|
|
|
for (x = 0; x < 4; x++, flags >>= 2)
|
|
*pixel_ptr++ = P[flags & 0x03];
|
|
|
|
if (vert) {
|
|
pixel_ptr += s->stride - 4;
|
|
// switch to right half
|
|
if (y == 7) pixel_ptr -= 8 * s->stride - 4;
|
|
} else if (y & 1) pixel_ptr += s->line_inc;
|
|
}
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 64-color encoding (each pixel in block is a different color) */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 128);
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
for (x = 0; x < 8; x++)
|
|
pixel_ptr[x] = bytestream_get_le16(&s->stream_ptr);
|
|
pixel_ptr += s->stride;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 16-color block encoding: each 2x2 block is a different color */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 32);
|
|
|
|
for (y = 0; y < 8; y += 2) {
|
|
for (x = 0; x < 8; x += 2) {
|
|
pixel_ptr[x ] =
|
|
pixel_ptr[x + 1 ] =
|
|
pixel_ptr[x + s->stride] =
|
|
pixel_ptr[x + 1 + s->stride] = bytestream_get_le16(&s->stream_ptr);
|
|
}
|
|
pixel_ptr += s->stride * 2;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t P[2];
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 4-color block encoding: each 4x4 block is a different color */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
if (!(y & 3)) {
|
|
P[0] = bytestream_get_le16(&s->stream_ptr);
|
|
P[1] = bytestream_get_le16(&s->stream_ptr);
|
|
}
|
|
for (x = 0; x < 8; x++)
|
|
pixel_ptr[x] = P[x >> 2];
|
|
pixel_ptr += s->stride;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_block_opcode_0xE_16(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
uint16_t pix;
|
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
|
|
|
|
/* 1-color encoding: the whole block is 1 solid color */
|
|
CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
|
|
pix = bytestream_get_le16(&s->stream_ptr);
|
|
|
|
for (y = 0; y < 8; y++) {
|
|
for (x = 0; x < 8; x++)
|
|
pixel_ptr[x] = pix;
|
|
pixel_ptr += s->stride;
|
|
}
|
|
|
|
/* report success */
|
|
return 0;
|
|
}
|
|
|
|
static int (* const ipvideo_decode_block[])(IpvideoContext *s) = {
|
|
ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
|
|
ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
|
|
ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
|
|
ipvideo_decode_block_opcode_0x6, ipvideo_decode_block_opcode_0x7,
|
|
ipvideo_decode_block_opcode_0x8, ipvideo_decode_block_opcode_0x9,
|
|
ipvideo_decode_block_opcode_0xA, ipvideo_decode_block_opcode_0xB,
|
|
ipvideo_decode_block_opcode_0xC, ipvideo_decode_block_opcode_0xD,
|
|
ipvideo_decode_block_opcode_0xE, ipvideo_decode_block_opcode_0xF,
|
|
};
|
|
|
|
static int (* const ipvideo_decode_block16[])(IpvideoContext *s) = {
|
|
ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
|
|
ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
|
|
ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
|
|
ipvideo_decode_block_opcode_0x6_16, ipvideo_decode_block_opcode_0x7_16,
|
|
ipvideo_decode_block_opcode_0x8_16, ipvideo_decode_block_opcode_0x9_16,
|
|
ipvideo_decode_block_opcode_0xA_16, ipvideo_decode_block_opcode_0xB_16,
|
|
ipvideo_decode_block_opcode_0xC_16, ipvideo_decode_block_opcode_0xD_16,
|
|
ipvideo_decode_block_opcode_0xE_16, ipvideo_decode_block_opcode_0x1,
|
|
};
|
|
|
|
static void ipvideo_decode_opcodes(IpvideoContext *s)
|
|
{
|
|
int x, y;
|
|
unsigned char opcode;
|
|
int ret;
|
|
static int frame = 0;
|
|
GetBitContext gb;
|
|
|
|
debug_interplay("------------------ frame %d\n", frame);
|
|
frame++;
|
|
|
|
if (!s->is_16bpp) {
|
|
/* this is PAL8, so make the palette available */
|
|
memcpy(s->current_frame.data[1], s->pal, AVPALETTE_SIZE);
|
|
|
|
s->stride = s->current_frame.linesize[0];
|
|
s->stream_ptr = s->buf + 14; /* data starts 14 bytes in */
|
|
s->stream_end = s->buf + s->size;
|
|
} else {
|
|
s->stride = s->current_frame.linesize[0] >> 1;
|
|
s->stream_ptr = s->buf + 16;
|
|
s->stream_end =
|
|
s->mv_ptr = s->buf + 14 + AV_RL16(s->buf+14);
|
|
s->mv_end = s->buf + s->size;
|
|
}
|
|
s->line_inc = s->stride - 8;
|
|
s->upper_motion_limit_offset = (s->avctx->height - 8) * s->current_frame.linesize[0]
|
|
+ (s->avctx->width - 8) * (1 + s->is_16bpp);
|
|
|
|
init_get_bits(&gb, s->decoding_map, s->decoding_map_size * 8);
|
|
for (y = 0; y < s->avctx->height; y += 8) {
|
|
for (x = 0; x < s->avctx->width; x += 8) {
|
|
opcode = get_bits(&gb, 4);
|
|
|
|
debug_interplay(" block @ (%3d, %3d): encoding 0x%X, data ptr @ %p\n",
|
|
x, y, opcode, s->stream_ptr);
|
|
|
|
if (!s->is_16bpp) {
|
|
s->pixel_ptr = s->current_frame.data[0] + x
|
|
+ y*s->current_frame.linesize[0];
|
|
ret = ipvideo_decode_block[opcode](s);
|
|
} else {
|
|
s->pixel_ptr = s->current_frame.data[0] + x*2
|
|
+ y*s->current_frame.linesize[0];
|
|
ret = ipvideo_decode_block16[opcode](s);
|
|
}
|
|
if (ret != 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, " Interplay video: decode problem on frame %d, @ block (%d, %d)\n",
|
|
frame, x, y);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (s->stream_end - s->stream_ptr > 1) {
|
|
av_log(s->avctx, AV_LOG_ERROR, " Interplay video: decode finished with %td bytes left over\n",
|
|
s->stream_end - s->stream_ptr);
|
|
}
|
|
}
|
|
|
|
static av_cold int ipvideo_decode_init(AVCodecContext *avctx)
|
|
{
|
|
IpvideoContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
|
|
s->is_16bpp = avctx->bits_per_coded_sample == 16;
|
|
avctx->pix_fmt = s->is_16bpp ? PIX_FMT_RGB555 : PIX_FMT_PAL8;
|
|
|
|
dsputil_init(&s->dsp, avctx);
|
|
|
|
/* decoding map contains 4 bits of information per 8x8 block */
|
|
s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2);
|
|
|
|
s->current_frame.data[0] = s->last_frame.data[0] =
|
|
s->second_last_frame.data[0] = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipvideo_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
IpvideoContext *s = avctx->priv_data;
|
|
|
|
/* compressed buffer needs to be large enough to at least hold an entire
|
|
* decoding map */
|
|
if (buf_size < s->decoding_map_size)
|
|
return buf_size;
|
|
|
|
s->decoding_map = buf;
|
|
s->buf = buf + s->decoding_map_size;
|
|
s->size = buf_size - s->decoding_map_size;
|
|
|
|
s->current_frame.reference = 3;
|
|
if (avctx->get_buffer(avctx, &s->current_frame)) {
|
|
av_log(avctx, AV_LOG_ERROR, " Interplay Video: get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!s->is_16bpp) {
|
|
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
|
|
if (pal) {
|
|
s->current_frame.palette_has_changed = 1;
|
|
memcpy(s->pal, pal, AVPALETTE_SIZE);
|
|
}
|
|
}
|
|
|
|
ipvideo_decode_opcodes(s);
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = s->current_frame;
|
|
|
|
/* shuffle frames */
|
|
if (s->second_last_frame.data[0])
|
|
avctx->release_buffer(avctx, &s->second_last_frame);
|
|
s->second_last_frame = s->last_frame;
|
|
s->last_frame = s->current_frame;
|
|
s->current_frame.data[0] = NULL; /* catch any access attempts */
|
|
|
|
/* report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int ipvideo_decode_end(AVCodecContext *avctx)
|
|
{
|
|
IpvideoContext *s = avctx->priv_data;
|
|
|
|
/* release the last frame */
|
|
if (s->last_frame.data[0])
|
|
avctx->release_buffer(avctx, &s->last_frame);
|
|
if (s->second_last_frame.data[0])
|
|
avctx->release_buffer(avctx, &s->second_last_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_interplay_video_decoder = {
|
|
"interplayvideo",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_INTERPLAY_VIDEO,
|
|
sizeof(IpvideoContext),
|
|
ipvideo_decode_init,
|
|
NULL,
|
|
ipvideo_decode_end,
|
|
ipvideo_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
|
|
};
|