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1052 lines
32 KiB
1052 lines
32 KiB
/* |
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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 FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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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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|
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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 "hpeldsp.h" |
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#define BITSTREAM_READER_LE |
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#include "get_bits.h" |
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#include "internal.h" |
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#define PALETTE_COUNT 256 |
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typedef struct IpvideoContext { |
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AVCodecContext *avctx; |
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HpelDSPContext hdsp; |
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AVFrame *second_last_frame; |
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AVFrame *last_frame; |
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const unsigned char *decoding_map; |
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int decoding_map_size; |
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int is_16bpp; |
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GetByteContext stream_ptr, mv_ptr; |
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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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static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y) |
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{ |
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int current_offset = s->pixel_ptr - dst->data[0]; |
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int motion_offset = current_offset + delta_y * dst->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, "motion offset < 0 (%d)\n", motion_offset); |
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return AVERROR_INVALIDDATA; |
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} else if (motion_offset > s->upper_motion_limit_offset) { |
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av_log(s->avctx, AV_LOG_ERROR, "motion offset above limit (%d >= %d)\n", |
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motion_offset, s->upper_motion_limit_offset); |
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return AVERROR_INVALIDDATA; |
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} |
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if (!src->data[0]) { |
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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->hdsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset, |
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dst->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, AVFrame *frame) |
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{ |
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return copy_from(s, s->last_frame, frame, 0, 0); |
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} |
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static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s, AVFrame *frame) |
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{ |
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return copy_from(s, s->second_last_frame, frame, 0, 0); |
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} |
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static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s, AVFrame *frame) |
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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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B = bytestream2_get_byte(&s->stream_ptr); |
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} else { |
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B = bytestream2_get_byte(&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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av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
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return copy_from(s, s->second_last_frame, frame, x, y); |
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} |
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static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s, AVFrame *frame) |
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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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B = bytestream2_get_byte(&s->stream_ptr); |
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} else { |
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B = bytestream2_get_byte(&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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av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
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return copy_from(s, frame, frame, x, y); |
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} |
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static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s, AVFrame *frame) |
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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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B = bytestream2_get_byte(&s->stream_ptr); |
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} else { |
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B = bytestream2_get_byte(&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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av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
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return copy_from(s, s->last_frame, frame, x, y); |
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} |
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static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s, AVFrame *frame) |
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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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x = bytestream2_get_byte(&s->stream_ptr); |
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y = bytestream2_get_byte(&s->stream_ptr); |
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av_dlog(s->avctx, "motion bytes = %d, %d\n", x, y); |
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return copy_from(s, s->last_frame, frame, x, y); |
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} |
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static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s, AVFrame *frame) |
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{ |
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/* mystery opcode? skip multiple blocks? */ |
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av_log(s->avctx, AV_LOG_ERROR, "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, AVFrame *frame) |
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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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if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) { |
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av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x7\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* 2-color encoding */ |
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P[0] = bytestream2_get_byte(&s->stream_ptr); |
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P[1] = bytestream2_get_byte(&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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for (y = 0; y < 8; y++) { |
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flags = bytestream2_get_byte(&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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flags = bytestream2_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, AVFrame *frame) |
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{ |
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int x, y; |
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unsigned char P[4]; |
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unsigned int flags = 0; |
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if (bytestream2_get_bytes_left(&s->stream_ptr) < 12) { |
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av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x8\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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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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P[0] = bytestream2_get_byte(&s->stream_ptr); |
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P[1] = bytestream2_get_byte(&s->stream_ptr); |
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if (P[0] <= P[1]) { |
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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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if (y) { |
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P[0] = bytestream2_get_byte(&s->stream_ptr); |
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P[1] = bytestream2_get_byte(&s->stream_ptr); |
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} |
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flags = bytestream2_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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flags = bytestream2_get_le32(&s->stream_ptr); |
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P[2] = bytestream2_get_byte(&s->stream_ptr); |
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P[3] = bytestream2_get_byte(&s->stream_ptr); |
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if (P[2] <= P[3]) { |
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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] = P[2]; |
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P[1] = P[3]; |
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flags = bytestream2_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] = P[2]; |
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P[1] = P[3]; |
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flags = bytestream2_get_le32(&s->stream_ptr); |
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} |
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for (x = 0; x < 8; x++, 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, AVFrame *frame) |
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{ |
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int x, y; |
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unsigned char P[4]; |
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if (bytestream2_get_bytes_left(&s->stream_ptr) < 8) { |
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av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x9\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* 4-color encoding */ |
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bytestream2_get_buffer(&s->stream_ptr, P, 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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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 = bytestream2_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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flags = bytestream2_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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flags = bytestream2_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, AVFrame *frame) |
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{ |
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int x, y; |
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unsigned char P[8]; |
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int flags = 0; |
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if (bytestream2_get_bytes_left(&s->stream_ptr) < 16) { |
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av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xA\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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bytestream2_get_buffer(&s->stream_ptr, P, 4); |
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|
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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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if (P[0] <= P[1]) { |
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|
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/* 4-color encoding for each quadrant; need 32 bytes */ |
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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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if (y) bytestream2_get_buffer(&s->stream_ptr, P, 4); |
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flags = bytestream2_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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|
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} else { |
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// vertical split? |
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int vert; |
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uint64_t flags = bytestream2_get_le64(&s->stream_ptr); |
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bytestream2_get_buffer(&s->stream_ptr, P + 4, 4); |
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vert = P[4] <= P[5]; |
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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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for (x = 0; x < 4; x++, flags >>= 2) |
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*s->pixel_ptr++ = P[flags & 0x03]; |
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|
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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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// load values for second half |
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if (y == 7) { |
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memcpy(P, P + 4, 4); |
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flags = bytestream2_get_le64(&s->stream_ptr); |
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} |
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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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|
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static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s, AVFrame *frame) |
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{ |
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int y; |
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|
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/* 64-color encoding (each pixel in block is a different color) */ |
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for (y = 0; y < 8; y++) { |
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bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8); |
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s->pixel_ptr += s->stride; |
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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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|
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static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s, AVFrame *frame) |
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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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for (y = 0; y < 8; y += 2) { |
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for (x = 0; x < 8; x += 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] = bytestream2_get_byte(&s->stream_ptr); |
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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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|
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static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s, AVFrame *frame) |
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{ |
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int y; |
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unsigned char P[2]; |
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|
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if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) { |
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av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xD\n"); |
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return AVERROR_INVALIDDATA; |
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} |
|
|
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/* 4-color block encoding: each 4x4 block is a different color */ |
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for (y = 0; y < 8; y++) { |
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if (!(y & 3)) { |
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P[0] = bytestream2_get_byte(&s->stream_ptr); |
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P[1] = bytestream2_get_byte(&s->stream_ptr); |
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} |
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memset(s->pixel_ptr, P[0], 4); |
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memset(s->pixel_ptr + 4, P[1], 4); |
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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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|
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static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s, AVFrame *frame) |
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{ |
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int y; |
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unsigned char pix; |
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|
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/* 1-color encoding: the whole block is 1 solid color */ |
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pix = bytestream2_get_byte(&s->stream_ptr); |
|
|
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for (y = 0; y < 8; y++) { |
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memset(s->pixel_ptr, pix, 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_0xF(IpvideoContext *s, AVFrame *frame) |
|
{ |
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int x, y; |
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unsigned char sample[2]; |
|
|
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/* dithered encoding */ |
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sample[0] = bytestream2_get_byte(&s->stream_ptr); |
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sample[1] = bytestream2_get_byte(&s->stream_ptr); |
|
|
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for (y = 0; y < 8; y++) { |
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for (x = 0; x < 8; x += 2) { |
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*s->pixel_ptr++ = sample[ y & 1 ]; |
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*s->pixel_ptr++ = sample[!(y & 1)]; |
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} |
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s->pixel_ptr += s->line_inc; |
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} |
|
|
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/* report success */ |
|
return 0; |
|
} |
|
|
|
static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s, AVFrame *frame) |
|
{ |
|
signed char x, y; |
|
|
|
/* copy a block from the second last frame using an expanded range */ |
|
x = bytestream2_get_byte(&s->stream_ptr); |
|
y = bytestream2_get_byte(&s->stream_ptr); |
|
|
|
av_dlog(s->avctx, "motion bytes = %d, %d\n", x, y); |
|
return copy_from(s, s->second_last_frame, frame, x, y); |
|
} |
|
|
|
static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s, AVFrame *frame) |
|
{ |
|
int x, y; |
|
uint16_t P[2]; |
|
unsigned int flags; |
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
|
|
|
/* 2-color encoding */ |
|
P[0] = bytestream2_get_le16(&s->stream_ptr); |
|
P[1] = bytestream2_get_le16(&s->stream_ptr); |
|
|
|
if (!(P[0] & 0x8000)) { |
|
|
|
for (y = 0; y < 8; y++) { |
|
flags = bytestream2_get_byte(&s->stream_ptr) | 0x100; |
|
for (; flags != 1; flags >>= 1) |
|
*pixel_ptr++ = P[flags & 1]; |
|
pixel_ptr += s->line_inc; |
|
} |
|
|
|
} else { |
|
|
|
flags = bytestream2_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, AVFrame *frame) |
|
{ |
|
int x, y; |
|
uint16_t P[4]; |
|
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 */ |
|
P[0] = bytestream2_get_le16(&s->stream_ptr); |
|
P[1] = bytestream2_get_le16(&s->stream_ptr); |
|
|
|
if (!(P[0] & 0x8000)) { |
|
|
|
for (y = 0; y < 16; y++) { |
|
// new values for each 4x4 block |
|
if (!(y & 3)) { |
|
if (y) { |
|
P[0] = bytestream2_get_le16(&s->stream_ptr); |
|
P[1] = bytestream2_get_le16(&s->stream_ptr); |
|
} |
|
flags = bytestream2_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 { |
|
|
|
flags = bytestream2_get_le32(&s->stream_ptr); |
|
P[2] = bytestream2_get_le16(&s->stream_ptr); |
|
P[3] = bytestream2_get_le16(&s->stream_ptr); |
|
|
|
if (!(P[2] & 0x8000)) { |
|
|
|
/* 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] = P[2]; |
|
P[1] = P[3]; |
|
flags = bytestream2_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] = P[2]; |
|
P[1] = P[3]; |
|
flags = bytestream2_get_le32(&s->stream_ptr); |
|
} |
|
|
|
for (x = 0; x < 8; x++, 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, AVFrame *frame) |
|
{ |
|
int x, y; |
|
uint16_t P[4]; |
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
|
|
|
/* 4-color encoding */ |
|
for (x = 0; x < 4; x++) |
|
P[x] = bytestream2_get_le16(&s->stream_ptr); |
|
|
|
if (!(P[0] & 0x8000)) { |
|
if (!(P[2] & 0x8000)) { |
|
|
|
/* 1 of 4 colors for each pixel */ |
|
for (y = 0; y < 8; y++) { |
|
/* get the next set of 8 2-bit flags */ |
|
int flags = bytestream2_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 */ |
|
flags = bytestream2_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 */ |
|
flags = bytestream2_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, AVFrame *frame) |
|
{ |
|
int x, y; |
|
uint16_t P[8]; |
|
int flags = 0; |
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
|
|
|
for (x = 0; x < 4; x++) |
|
P[x] = bytestream2_get_le16(&s->stream_ptr); |
|
|
|
/* 4-color encoding for each 4x4 quadrant, or 4-color encoding on |
|
* either top and bottom or left and right halves */ |
|
if (!(P[0] & 0x8000)) { |
|
|
|
/* 4-color encoding for each quadrant */ |
|
for (y = 0; y < 16; y++) { |
|
// new values for each 4x4 block |
|
if (!(y & 3)) { |
|
if (y) |
|
for (x = 0; x < 4; x++) |
|
P[x] = bytestream2_get_le16(&s->stream_ptr); |
|
flags = bytestream2_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; |
|
uint64_t flags = bytestream2_get_le64(&s->stream_ptr); |
|
|
|
for (x = 4; x < 8; x++) |
|
P[x] = bytestream2_get_le16(&s->stream_ptr); |
|
vert = !(P[4] & 0x8000); |
|
|
|
/* 4-color encoding for either left and right or top and bottom |
|
* halves */ |
|
|
|
for (y = 0; y < 16; y++) { |
|
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; |
|
|
|
// load values for second half |
|
if (y == 7) { |
|
memcpy(P, P + 4, 8); |
|
flags = bytestream2_get_le64(&s->stream_ptr); |
|
} |
|
} |
|
} |
|
|
|
/* report success */ |
|
return 0; |
|
} |
|
|
|
static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s, AVFrame *frame) |
|
{ |
|
int x, y; |
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
|
|
|
/* 64-color encoding (each pixel in block is a different color) */ |
|
for (y = 0; y < 8; y++) { |
|
for (x = 0; x < 8; x++) |
|
pixel_ptr[x] = bytestream2_get_le16(&s->stream_ptr); |
|
pixel_ptr += s->stride; |
|
} |
|
|
|
/* report success */ |
|
return 0; |
|
} |
|
|
|
static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s, AVFrame *frame) |
|
{ |
|
int x, y; |
|
uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr; |
|
|
|
/* 16-color block encoding: each 2x2 block is a different color */ |
|
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] = bytestream2_get_le16(&s->stream_ptr); |
|
} |
|
pixel_ptr += s->stride * 2; |
|
} |
|
|
|
/* report success */ |
|
return 0; |
|
} |
|
|
|
static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s, AVFrame *frame) |
|
{ |
|
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 */ |
|
for (y = 0; y < 8; y++) { |
|
if (!(y & 3)) { |
|
P[0] = bytestream2_get_le16(&s->stream_ptr); |
|
P[1] = bytestream2_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, AVFrame *frame) |
|
{ |
|
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 */ |
|
pix = bytestream2_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, AVFrame *frame) = { |
|
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, AVFrame *frame) = { |
|
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, AVFrame *frame) |
|
{ |
|
int x, y; |
|
unsigned char opcode; |
|
int ret; |
|
GetBitContext gb; |
|
|
|
bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */ |
|
if (!s->is_16bpp) { |
|
/* this is PAL8, so make the palette available */ |
|
memcpy(frame->data[1], s->pal, AVPALETTE_SIZE); |
|
|
|
s->stride = frame->linesize[0]; |
|
} else { |
|
s->stride = frame->linesize[0] >> 1; |
|
s->mv_ptr = s->stream_ptr; |
|
bytestream2_skip(&s->mv_ptr, bytestream2_get_le16(&s->stream_ptr)); |
|
} |
|
s->line_inc = s->stride - 8; |
|
s->upper_motion_limit_offset = (s->avctx->height - 8) * 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); |
|
|
|
av_dlog(s->avctx, |
|
" block @ (%3d, %3d): encoding 0x%X, data ptr offset %d\n", |
|
x, y, opcode, bytestream2_tell(&s->stream_ptr)); |
|
|
|
if (!s->is_16bpp) { |
|
s->pixel_ptr = frame->data[0] + x |
|
+ y*frame->linesize[0]; |
|
ret = ipvideo_decode_block[opcode](s, frame); |
|
} else { |
|
s->pixel_ptr = frame->data[0] + x*2 |
|
+ y*frame->linesize[0]; |
|
ret = ipvideo_decode_block16[opcode](s, frame); |
|
} |
|
if (ret != 0) { |
|
av_log(s->avctx, AV_LOG_ERROR, "decode problem on frame %d, @ block (%d, %d)\n", |
|
s->avctx->frame_number, x, y); |
|
return; |
|
} |
|
} |
|
} |
|
if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) { |
|
av_log(s->avctx, AV_LOG_ERROR, |
|
"decode finished with %d bytes left over\n", |
|
bytestream2_get_bytes_left(&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 ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_PAL8; |
|
|
|
ff_hpeldsp_init(&s->hdsp, avctx->flags); |
|
|
|
s->last_frame = av_frame_alloc(); |
|
s->second_last_frame = av_frame_alloc(); |
|
if (!s->last_frame || !s->second_last_frame) { |
|
av_frame_free(&s->last_frame); |
|
av_frame_free(&s->second_last_frame); |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ipvideo_decode_frame(AVCodecContext *avctx, |
|
void *data, int *got_frame, |
|
AVPacket *avpkt) |
|
{ |
|
const uint8_t *buf = avpkt->data; |
|
int buf_size = avpkt->size; |
|
IpvideoContext *s = avctx->priv_data; |
|
AVFrame *frame = data; |
|
int ret; |
|
|
|
/* decoding map contains 4 bits of information per 8x8 block */ |
|
s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2); |
|
|
|
/* 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; |
|
|
|
if (av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, NULL)) { |
|
av_frame_unref(s->last_frame); |
|
av_frame_unref(s->second_last_frame); |
|
} |
|
|
|
s->decoding_map = buf; |
|
bytestream2_init(&s->stream_ptr, buf + s->decoding_map_size, |
|
buf_size - s->decoding_map_size); |
|
|
|
if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) |
|
return ret; |
|
|
|
if (!s->is_16bpp) { |
|
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); |
|
if (pal) { |
|
frame->palette_has_changed = 1; |
|
memcpy(s->pal, pal, AVPALETTE_SIZE); |
|
} |
|
} |
|
|
|
ipvideo_decode_opcodes(s, frame); |
|
|
|
*got_frame = 1; |
|
|
|
/* shuffle frames */ |
|
av_frame_unref(s->second_last_frame); |
|
FFSWAP(AVFrame*, s->second_last_frame, s->last_frame); |
|
if ((ret = av_frame_ref(s->last_frame, frame)) < 0) |
|
return ret; |
|
|
|
/* report that the buffer was completely consumed */ |
|
return buf_size; |
|
} |
|
|
|
static av_cold int ipvideo_decode_end(AVCodecContext *avctx) |
|
{ |
|
IpvideoContext *s = avctx->priv_data; |
|
|
|
av_frame_free(&s->last_frame); |
|
av_frame_free(&s->second_last_frame); |
|
|
|
return 0; |
|
} |
|
|
|
AVCodec ff_interplay_video_decoder = { |
|
.name = "interplayvideo", |
|
.long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"), |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = AV_CODEC_ID_INTERPLAY_VIDEO, |
|
.priv_data_size = sizeof(IpvideoContext), |
|
.init = ipvideo_decode_init, |
|
.close = ipvideo_decode_end, |
|
.decode = ipvideo_decode_frame, |
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE, |
|
};
|
|
|