1116 lines
43 KiB
C
Executable File
1116 lines
43 KiB
C
Executable File
/*
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* FLI/FLC Animation Video Decoder
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* Copyright (C) 2003, 2004 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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* @file
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* Autodesk Animator FLI/FLC Video Decoder
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* by Mike Melanson (melanson@pcisys.net)
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* for more information on the .fli/.flc file format and all of its many
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* variations, visit:
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* http://www.compuphase.com/flic.htm
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*
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* This decoder outputs PAL8/RGB555/RGB565/BGR24. To use this decoder, be
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* sure that your demuxer sends the FLI file header to the decoder via
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* the extradata chunk in AVCodecContext. The chunk should be 128 bytes
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* large. The only exception is for FLI files from the game "Magic Carpet",
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* in which the header is only 12 bytes.
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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 "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "mathops.h"
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#define FLI_256_COLOR 4
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#define FLI_DELTA 7
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#define FLI_COLOR 11
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#define FLI_LC 12
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#define FLI_BLACK 13
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#define FLI_BRUN 15
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#define FLI_COPY 16
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#define FLI_MINI 18
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#define FLI_DTA_BRUN 25
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#define FLI_DTA_COPY 26
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#define FLI_DTA_LC 27
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#define FLI_TYPE_CODE (0xAF11)
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#define FLC_FLX_TYPE_CODE (0xAF12)
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#define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */
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#define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13)
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#define CHECK_PIXEL_PTR(n) \
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if (pixel_ptr + n > pixel_limit) { \
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av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \
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pixel_ptr + n, pixel_limit); \
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return AVERROR_INVALIDDATA; \
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} \
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typedef struct FlicDecodeContext {
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AVCodecContext *avctx;
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AVFrame *frame;
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unsigned int palette[256];
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int new_palette;
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int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
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} FlicDecodeContext;
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static av_cold int flic_decode_init(AVCodecContext *avctx)
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{
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FlicDecodeContext *s = avctx->priv_data;
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unsigned char *fli_header = (unsigned char *)avctx->extradata;
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int depth;
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if (avctx->extradata_size != 0 &&
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avctx->extradata_size != 12 &&
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avctx->extradata_size != 128 &&
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avctx->extradata_size != 256 &&
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avctx->extradata_size != 904 &&
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avctx->extradata_size != 1024) {
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av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size);
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return AVERROR_INVALIDDATA;
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}
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s->avctx = avctx;
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if (s->avctx->extradata_size == 12) {
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/* special case for magic carpet FLIs */
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s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE;
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depth = 8;
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} else if (avctx->extradata_size == 1024) {
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uint8_t *ptr = avctx->extradata;
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int i;
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for (i = 0; i < 256; i++) {
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s->palette[i] = AV_RL32(ptr);
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ptr += 4;
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}
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depth = 8;
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/* FLI in MOV, see e.g. FFmpeg trac issue #626 */
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} else if (avctx->extradata_size == 0 ||
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avctx->extradata_size == 256 ||
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/* see FFmpeg ticket #1234 */
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avctx->extradata_size == 904) {
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s->fli_type = FLI_TYPE_CODE;
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depth = 8;
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} else {
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s->fli_type = AV_RL16(&fli_header[4]);
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depth = AV_RL16(&fli_header[12]);
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}
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if (depth == 0) {
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depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
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}
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if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
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depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
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}
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switch (depth) {
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case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
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case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
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case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break;
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case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; break;
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default :
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av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
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return AVERROR_INVALIDDATA;
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}
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s->frame = av_frame_alloc();
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if (!s->frame)
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return AVERROR(ENOMEM);
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s->new_palette = 0;
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return 0;
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}
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static int flic_decode_frame_8BPP(AVCodecContext *avctx,
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void *data, int *got_frame,
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const uint8_t *buf, int buf_size)
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{
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FlicDecodeContext *s = avctx->priv_data;
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GetByteContext g2;
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int pixel_ptr;
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int palette_ptr;
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unsigned char palette_idx1;
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unsigned char palette_idx2;
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unsigned int frame_size;
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int num_chunks;
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unsigned int chunk_size;
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int chunk_type;
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int i, j, ret;
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int color_packets;
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int color_changes;
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int color_shift;
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unsigned char r, g, b;
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int lines;
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int compressed_lines;
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int starting_line;
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int line_packets;
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int y_ptr;
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int byte_run;
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int pixel_skip;
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int pixel_countdown;
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unsigned char *pixels;
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unsigned int pixel_limit;
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bytestream2_init(&g2, buf, buf_size);
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if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
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return ret;
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pixels = s->frame->data[0];
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pixel_limit = s->avctx->height * s->frame->linesize[0];
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if (buf_size < 16 || buf_size > INT_MAX - (3 * 256 + AV_INPUT_BUFFER_PADDING_SIZE))
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return AVERROR_INVALIDDATA;
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frame_size = bytestream2_get_le32(&g2);
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if (frame_size > buf_size)
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frame_size = buf_size;
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bytestream2_skip(&g2, 2); /* skip the magic number */
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num_chunks = bytestream2_get_le16(&g2);
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bytestream2_skip(&g2, 8); /* skip padding */
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if (frame_size < 16)
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return AVERROR_INVALIDDATA;
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frame_size -= 16;
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/* iterate through the chunks */
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while ((frame_size >= 6) && (num_chunks > 0) &&
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bytestream2_get_bytes_left(&g2) >= 4) {
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int stream_ptr_after_chunk;
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chunk_size = bytestream2_get_le32(&g2);
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if (chunk_size > frame_size) {
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av_log(avctx, AV_LOG_WARNING,
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"Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
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chunk_size = frame_size;
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}
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stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
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chunk_type = bytestream2_get_le16(&g2);
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switch (chunk_type) {
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case FLI_256_COLOR:
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case FLI_COLOR:
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/* check special case: If this file is from the Magic Carpet
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* game and uses 6-bit colors even though it reports 256-color
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* chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
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* initialization) */
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if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
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color_shift = 0;
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else
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color_shift = 2;
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/* set up the palette */
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color_packets = bytestream2_get_le16(&g2);
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palette_ptr = 0;
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for (i = 0; i < color_packets; i++) {
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/* first byte is how many colors to skip */
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palette_ptr += bytestream2_get_byte(&g2);
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/* next byte indicates how many entries to change */
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color_changes = bytestream2_get_byte(&g2);
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/* if there are 0 color changes, there are actually 256 */
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if (color_changes == 0)
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color_changes = 256;
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if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk)
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break;
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for (j = 0; j < color_changes; j++) {
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unsigned int entry;
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/* wrap around, for good measure */
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if ((unsigned)palette_ptr >= 256)
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palette_ptr = 0;
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r = bytestream2_get_byte(&g2) << color_shift;
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g = bytestream2_get_byte(&g2) << color_shift;
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b = bytestream2_get_byte(&g2) << color_shift;
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entry = 0xFFU << 24 | r << 16 | g << 8 | b;
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if (color_shift == 2)
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entry |= entry >> 6 & 0x30303;
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if (s->palette[palette_ptr] != entry)
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s->new_palette = 1;
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s->palette[palette_ptr++] = entry;
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}
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}
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break;
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case FLI_DELTA:
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y_ptr = 0;
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compressed_lines = bytestream2_get_le16(&g2);
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while (compressed_lines > 0) {
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if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
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break;
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if (y_ptr > pixel_limit)
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return AVERROR_INVALIDDATA;
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line_packets = sign_extend(bytestream2_get_le16(&g2), 16);
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if ((line_packets & 0xC000) == 0xC000) {
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// line skip opcode
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line_packets = -line_packets;
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if (line_packets > s->avctx->height)
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return AVERROR_INVALIDDATA;
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y_ptr += line_packets * s->frame->linesize[0];
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} else if ((line_packets & 0xC000) == 0x4000) {
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av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
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} else if ((line_packets & 0xC000) == 0x8000) {
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// "last byte" opcode
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pixel_ptr= y_ptr + s->frame->linesize[0] - 1;
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CHECK_PIXEL_PTR(0);
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pixels[pixel_ptr] = line_packets & 0xff;
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} else {
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compressed_lines--;
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pixel_ptr = y_ptr;
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CHECK_PIXEL_PTR(0);
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pixel_countdown = s->avctx->width;
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for (i = 0; i < line_packets; i++) {
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if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
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break;
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/* account for the skip bytes */
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pixel_skip = bytestream2_get_byte(&g2);
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pixel_ptr += pixel_skip;
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pixel_countdown -= pixel_skip;
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byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
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if (byte_run < 0) {
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byte_run = -byte_run;
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palette_idx1 = bytestream2_get_byte(&g2);
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palette_idx2 = bytestream2_get_byte(&g2);
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CHECK_PIXEL_PTR(byte_run * 2);
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for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
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pixels[pixel_ptr++] = palette_idx1;
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pixels[pixel_ptr++] = palette_idx2;
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}
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} else {
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CHECK_PIXEL_PTR(byte_run * 2);
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if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
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break;
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for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
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pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
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}
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}
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}
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y_ptr += s->frame->linesize[0];
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}
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}
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break;
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case FLI_LC:
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/* line compressed */
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starting_line = bytestream2_get_le16(&g2);
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if (starting_line >= s->avctx->height)
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return AVERROR_INVALIDDATA;
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y_ptr = 0;
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y_ptr += starting_line * s->frame->linesize[0];
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compressed_lines = bytestream2_get_le16(&g2);
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while (compressed_lines > 0) {
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pixel_ptr = y_ptr;
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CHECK_PIXEL_PTR(0);
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pixel_countdown = s->avctx->width;
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if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
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break;
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line_packets = bytestream2_get_byte(&g2);
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if (line_packets > 0) {
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for (i = 0; i < line_packets; i++) {
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/* account for the skip bytes */
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if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
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break;
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pixel_skip = bytestream2_get_byte(&g2);
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pixel_ptr += pixel_skip;
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pixel_countdown -= pixel_skip;
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byte_run = sign_extend(bytestream2_get_byte(&g2),8);
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if (byte_run > 0) {
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CHECK_PIXEL_PTR(byte_run);
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if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
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break;
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for (j = 0; j < byte_run; j++, pixel_countdown--) {
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pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
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}
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} else if (byte_run < 0) {
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byte_run = -byte_run;
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palette_idx1 = bytestream2_get_byte(&g2);
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CHECK_PIXEL_PTR(byte_run);
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for (j = 0; j < byte_run; j++, pixel_countdown--) {
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pixels[pixel_ptr++] = palette_idx1;
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}
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}
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}
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}
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y_ptr += s->frame->linesize[0];
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compressed_lines--;
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}
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break;
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case FLI_BLACK:
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/* set the whole frame to color 0 (which is usually black) */
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memset(pixels, 0,
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s->frame->linesize[0] * s->avctx->height);
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break;
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case FLI_BRUN:
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/* Byte run compression: This chunk type only occurs in the first
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* FLI frame and it will update the entire frame. */
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y_ptr = 0;
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for (lines = 0; lines < s->avctx->height; lines++) {
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pixel_ptr = y_ptr;
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/* disregard the line packets; instead, iterate through all
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* pixels on a row */
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bytestream2_skip(&g2, 1);
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pixel_countdown = s->avctx->width;
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while (pixel_countdown > 0) {
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if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
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break;
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byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
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if (!byte_run) {
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av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
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return AVERROR_INVALIDDATA;
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}
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|
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if (byte_run > 0) {
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palette_idx1 = bytestream2_get_byte(&g2);
|
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CHECK_PIXEL_PTR(byte_run);
|
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for (j = 0; j < byte_run; j++) {
|
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pixels[pixel_ptr++] = palette_idx1;
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pixel_countdown--;
|
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if (pixel_countdown < 0)
|
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av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
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pixel_countdown, lines);
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}
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} else { /* copy bytes if byte_run < 0 */
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byte_run = -byte_run;
|
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CHECK_PIXEL_PTR(byte_run);
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if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
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break;
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for (j = 0; j < byte_run; j++) {
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pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
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pixel_countdown--;
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if (pixel_countdown < 0)
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av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
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pixel_countdown, lines);
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}
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}
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}
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y_ptr += s->frame->linesize[0];
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}
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break;
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case FLI_COPY:
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/* copy the chunk (uncompressed frame) */
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if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * s->avctx->height) {
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av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
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"has incorrect size, skipping chunk\n", chunk_size - 6);
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bytestream2_skip(&g2, chunk_size - 6);
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} else {
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for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
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y_ptr += s->frame->linesize[0]) {
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bytestream2_get_buffer(&g2, &pixels[y_ptr],
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s->avctx->width);
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if (s->avctx->width & 3)
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bytestream2_skip(&g2, 4 - (s->avctx->width & 3));
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}
|
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}
|
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break;
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|
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case FLI_MINI:
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/* some sort of a thumbnail? disregard this chunk... */
|
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break;
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|
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default:
|
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av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
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break;
|
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}
|
|
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if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
|
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bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
|
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} else {
|
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av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
|
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break;
|
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}
|
|
|
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frame_size -= chunk_size;
|
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num_chunks--;
|
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}
|
|
|
|
/* by the end of the chunk, the stream ptr should equal the frame
|
|
* size (minus 1 or 2, possibly); if it doesn't, issue a warning */
|
|
if (bytestream2_get_bytes_left(&g2) > 2)
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
|
|
"and final chunk ptr = %d\n", buf_size,
|
|
buf_size - bytestream2_get_bytes_left(&g2));
|
|
|
|
/* make the palette available on the way out */
|
|
memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
|
|
if (s->new_palette) {
|
|
s->frame->palette_has_changed = 1;
|
|
s->new_palette = 0;
|
|
}
|
|
|
|
if ((ret = av_frame_ref(data, s->frame)) < 0)
|
|
return ret;
|
|
|
|
*got_frame = 1;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
/* Note, the only difference between the 15Bpp and 16Bpp */
|
|
/* Format is the pixel format, the packets are processed the same. */
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
GetByteContext g2;
|
|
int pixel_ptr;
|
|
unsigned char palette_idx1;
|
|
|
|
unsigned int frame_size;
|
|
int num_chunks;
|
|
|
|
unsigned int chunk_size;
|
|
int chunk_type;
|
|
|
|
int i, j, ret;
|
|
|
|
int lines;
|
|
int compressed_lines;
|
|
int line_packets;
|
|
int y_ptr;
|
|
int byte_run;
|
|
int pixel_skip;
|
|
int pixel_countdown;
|
|
unsigned char *pixels;
|
|
int pixel;
|
|
unsigned int pixel_limit;
|
|
|
|
bytestream2_init(&g2, buf, buf_size);
|
|
|
|
if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
|
|
return ret;
|
|
|
|
pixels = s->frame->data[0];
|
|
pixel_limit = s->avctx->height * s->frame->linesize[0];
|
|
|
|
frame_size = bytestream2_get_le32(&g2);
|
|
bytestream2_skip(&g2, 2); /* skip the magic number */
|
|
num_chunks = bytestream2_get_le16(&g2);
|
|
bytestream2_skip(&g2, 8); /* skip padding */
|
|
if (frame_size > buf_size)
|
|
frame_size = buf_size;
|
|
|
|
if (frame_size < 16)
|
|
return AVERROR_INVALIDDATA;
|
|
frame_size -= 16;
|
|
|
|
/* iterate through the chunks */
|
|
while ((frame_size > 0) && (num_chunks > 0) &&
|
|
bytestream2_get_bytes_left(&g2) >= 4) {
|
|
int stream_ptr_after_chunk;
|
|
chunk_size = bytestream2_get_le32(&g2);
|
|
if (chunk_size > frame_size) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
|
|
chunk_size = frame_size;
|
|
}
|
|
stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
|
|
|
|
chunk_type = bytestream2_get_le16(&g2);
|
|
|
|
|
|
switch (chunk_type) {
|
|
case FLI_256_COLOR:
|
|
case FLI_COLOR:
|
|
/* For some reason, it seems that non-palettized flics do
|
|
* include one of these chunks in their first frame.
|
|
* Why I do not know, it seems rather extraneous. */
|
|
ff_dlog(avctx,
|
|
"Unexpected Palette chunk %d in non-palettized FLC\n",
|
|
chunk_type);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
case FLI_DELTA:
|
|
case FLI_DTA_LC:
|
|
y_ptr = 0;
|
|
compressed_lines = bytestream2_get_le16(&g2);
|
|
while (compressed_lines > 0) {
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
|
|
break;
|
|
if (y_ptr > pixel_limit)
|
|
return AVERROR_INVALIDDATA;
|
|
line_packets = sign_extend(bytestream2_get_le16(&g2), 16);
|
|
if (line_packets < 0) {
|
|
line_packets = -line_packets;
|
|
if (line_packets > s->avctx->height)
|
|
return AVERROR_INVALIDDATA;
|
|
y_ptr += line_packets * s->frame->linesize[0];
|
|
} else {
|
|
compressed_lines--;
|
|
pixel_ptr = y_ptr;
|
|
CHECK_PIXEL_PTR(0);
|
|
pixel_countdown = s->avctx->width;
|
|
for (i = 0; i < line_packets; i++) {
|
|
/* account for the skip bytes */
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
|
|
break;
|
|
pixel_skip = bytestream2_get_byte(&g2);
|
|
pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
|
|
pixel_countdown -= pixel_skip;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run < 0) {
|
|
byte_run = -byte_run;
|
|
pixel = bytestream2_get_le16(&g2);
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel;
|
|
pixel_ptr += 2;
|
|
}
|
|
} else {
|
|
if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
|
|
break;
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
|
|
pixel_ptr += 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame->linesize[0];
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_LC:
|
|
av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
case FLI_BLACK:
|
|
/* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
|
|
memset(pixels, 0x0000,
|
|
s->frame->linesize[0] * s->avctx->height);
|
|
break;
|
|
|
|
case FLI_BRUN:
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = (s->avctx->width * 2);
|
|
|
|
while (pixel_countdown > 0) {
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
|
|
break;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
} else { /* copy bytes if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
|
|
break;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
|
|
* This does not give us any good opportunity to perform word endian conversion
|
|
* during decompression. So if it is required (i.e., this is not a LE target, we do
|
|
* a second pass over the line here, swapping the bytes.
|
|
*/
|
|
#if HAVE_BIGENDIAN
|
|
pixel_ptr = y_ptr;
|
|
pixel_countdown = s->avctx->width;
|
|
while (pixel_countdown > 0) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
|
|
pixel_ptr += 2;
|
|
}
|
|
#endif
|
|
y_ptr += s->frame->linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_DTA_BRUN:
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
|
|
|
|
while (pixel_countdown > 0) {
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
|
|
break;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
pixel = bytestream2_get_le16(&g2);
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel;
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
} else { /* copy pixels if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
|
|
break;
|
|
CHECK_PIXEL_PTR(2 * byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame->linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_COPY:
|
|
case FLI_DTA_COPY:
|
|
/* copy the chunk (uncompressed frame) */
|
|
if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) {
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
|
|
"bigger than image, skipping chunk\n", chunk_size - 6);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
} else {
|
|
|
|
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
|
|
y_ptr += s->frame->linesize[0]) {
|
|
|
|
pixel_countdown = s->avctx->width;
|
|
pixel_ptr = 0;
|
|
while (pixel_countdown > 0) {
|
|
*((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
}
|
|
if (s->avctx->width & 1)
|
|
bytestream2_skip(&g2, 2);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_MINI:
|
|
/* some sort of a thumbnail? disregard this chunk... */
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
|
|
break;
|
|
}
|
|
|
|
if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
|
|
bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
|
|
} else {
|
|
av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
|
|
break;
|
|
}
|
|
|
|
frame_size -= chunk_size;
|
|
num_chunks--;
|
|
}
|
|
|
|
/* by the end of the chunk, the stream ptr should equal the frame
|
|
* size (minus 1, possibly); if it doesn't, issue a warning */
|
|
if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
|
|
"and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
|
|
|
|
if ((ret = av_frame_ref(data, s->frame)) < 0)
|
|
return ret;
|
|
|
|
*got_frame = 1;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int flic_decode_frame_24BPP(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
GetByteContext g2;
|
|
int pixel_ptr;
|
|
unsigned char palette_idx1;
|
|
|
|
unsigned int frame_size;
|
|
int num_chunks;
|
|
|
|
unsigned int chunk_size;
|
|
int chunk_type;
|
|
|
|
int i, j, ret;
|
|
|
|
int lines;
|
|
int compressed_lines;
|
|
int line_packets;
|
|
int y_ptr;
|
|
int byte_run;
|
|
int pixel_skip;
|
|
int pixel_countdown;
|
|
unsigned char *pixels;
|
|
int pixel;
|
|
unsigned int pixel_limit;
|
|
|
|
bytestream2_init(&g2, buf, buf_size);
|
|
|
|
if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
|
|
return ret;
|
|
|
|
pixels = s->frame->data[0];
|
|
pixel_limit = s->avctx->height * s->frame->linesize[0];
|
|
|
|
frame_size = bytestream2_get_le32(&g2);
|
|
bytestream2_skip(&g2, 2); /* skip the magic number */
|
|
num_chunks = bytestream2_get_le16(&g2);
|
|
bytestream2_skip(&g2, 8); /* skip padding */
|
|
if (frame_size > buf_size)
|
|
frame_size = buf_size;
|
|
|
|
if (frame_size < 16)
|
|
return AVERROR_INVALIDDATA;
|
|
frame_size -= 16;
|
|
|
|
/* iterate through the chunks */
|
|
while ((frame_size > 0) && (num_chunks > 0) &&
|
|
bytestream2_get_bytes_left(&g2) >= 4) {
|
|
int stream_ptr_after_chunk;
|
|
chunk_size = bytestream2_get_le32(&g2);
|
|
if (chunk_size > frame_size) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
|
|
chunk_size = frame_size;
|
|
}
|
|
stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
|
|
|
|
chunk_type = bytestream2_get_le16(&g2);
|
|
|
|
|
|
switch (chunk_type) {
|
|
case FLI_256_COLOR:
|
|
case FLI_COLOR:
|
|
/* For some reason, it seems that non-palettized flics do
|
|
* include one of these chunks in their first frame.
|
|
* Why I do not know, it seems rather extraneous. */
|
|
ff_dlog(avctx,
|
|
"Unexpected Palette chunk %d in non-palettized FLC\n",
|
|
chunk_type);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
case FLI_DELTA:
|
|
case FLI_DTA_LC:
|
|
y_ptr = 0;
|
|
compressed_lines = bytestream2_get_le16(&g2);
|
|
while (compressed_lines > 0) {
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
|
|
break;
|
|
if (y_ptr > pixel_limit)
|
|
return AVERROR_INVALIDDATA;
|
|
line_packets = sign_extend(bytestream2_get_le16(&g2), 16);
|
|
if (line_packets < 0) {
|
|
line_packets = -line_packets;
|
|
if (line_packets > s->avctx->height)
|
|
return AVERROR_INVALIDDATA;
|
|
y_ptr += line_packets * s->frame->linesize[0];
|
|
} else {
|
|
compressed_lines--;
|
|
pixel_ptr = y_ptr;
|
|
CHECK_PIXEL_PTR(0);
|
|
pixel_countdown = s->avctx->width;
|
|
for (i = 0; i < line_packets; i++) {
|
|
/* account for the skip bytes */
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
|
|
break;
|
|
pixel_skip = bytestream2_get_byte(&g2);
|
|
pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */
|
|
pixel_countdown -= pixel_skip;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run < 0) {
|
|
byte_run = -byte_run;
|
|
pixel = bytestream2_get_le24(&g2);
|
|
CHECK_PIXEL_PTR(3 * byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
|
|
AV_WL24(&pixels[pixel_ptr], pixel);
|
|
pixel_ptr += 3;
|
|
}
|
|
} else {
|
|
if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
|
|
break;
|
|
CHECK_PIXEL_PTR(3 * byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) {
|
|
pixel = bytestream2_get_le24(&g2);
|
|
AV_WL24(&pixels[pixel_ptr], pixel);
|
|
pixel_ptr += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame->linesize[0];
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_LC:
|
|
av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
case FLI_BLACK:
|
|
/* set the whole frame to 0x00 which is black for 24 bit mode. */
|
|
memset(pixels, 0x00,
|
|
s->frame->linesize[0] * s->avctx->height);
|
|
break;
|
|
|
|
case FLI_BRUN:
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = (s->avctx->width * 3);
|
|
|
|
while (pixel_countdown > 0) {
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
|
|
break;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
} else { /* copy bytes if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
|
|
break;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
palette_idx1 = bytestream2_get_byte(&g2);
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
|
|
pixel_countdown, lines);
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame->linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_DTA_BRUN:
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < s->avctx->height; lines++) {
|
|
pixel_ptr = y_ptr;
|
|
/* disregard the line packets; instead, iterate through all
|
|
* pixels on a row */
|
|
bytestream2_skip(&g2, 1);
|
|
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
|
|
|
|
while (pixel_countdown > 0) {
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
|
|
break;
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
|
|
if (byte_run > 0) {
|
|
pixel = bytestream2_get_le24(&g2);
|
|
CHECK_PIXEL_PTR(3 * byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
AV_WL24(pixels + pixel_ptr, pixel);
|
|
pixel_ptr += 3;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
} else { /* copy pixels if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
|
|
break;
|
|
CHECK_PIXEL_PTR(3 * byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
pixel = bytestream2_get_le24(&g2);
|
|
AV_WL24(pixels + pixel_ptr, pixel);
|
|
pixel_ptr += 3;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += s->frame->linesize[0];
|
|
}
|
|
break;
|
|
|
|
case FLI_COPY:
|
|
case FLI_DTA_COPY:
|
|
/* copy the chunk (uncompressed frame) */
|
|
if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
|
|
"bigger than image, skipping chunk\n", chunk_size - 6);
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
} else {
|
|
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
|
|
y_ptr += s->frame->linesize[0]) {
|
|
|
|
bytestream2_get_buffer(&g2, pixels + y_ptr, 3*s->avctx->width);
|
|
if (s->avctx->width & 1)
|
|
bytestream2_skip(&g2, 3);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_MINI:
|
|
/* some sort of a thumbnail? disregard this chunk... */
|
|
bytestream2_skip(&g2, chunk_size - 6);
|
|
break;
|
|
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
|
|
break;
|
|
}
|
|
|
|
if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
|
|
bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
|
|
} else {
|
|
av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
|
|
break;
|
|
}
|
|
|
|
frame_size -= chunk_size;
|
|
num_chunks--;
|
|
}
|
|
|
|
/* by the end of the chunk, the stream ptr should equal the frame
|
|
* size (minus 1, possibly); if it doesn't, issue a warning */
|
|
if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
|
|
"and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
|
|
|
|
if ((ret = av_frame_ref(data, s->frame)) < 0)
|
|
return ret;
|
|
|
|
*got_frame = 1;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int flic_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
|
return flic_decode_frame_8BPP(avctx, data, got_frame,
|
|
buf, buf_size);
|
|
} else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
|
|
(avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
|
|
return flic_decode_frame_15_16BPP(avctx, data, got_frame,
|
|
buf, buf_size);
|
|
} else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
|
|
return flic_decode_frame_24BPP(avctx, data, got_frame,
|
|
buf, buf_size);
|
|
}
|
|
|
|
/* Should not get here, ever as the pix_fmt is processed */
|
|
/* in flic_decode_init and the above if should deal with */
|
|
/* the finite set of possibilities allowable by here. */
|
|
/* But in case we do, just error out. */
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
|
|
return AVERROR_BUG;
|
|
}
|
|
|
|
|
|
static av_cold int flic_decode_end(AVCodecContext *avctx)
|
|
{
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
av_frame_free(&s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_flic_decoder = {
|
|
.name = "flic",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_FLIC,
|
|
.priv_data_size = sizeof(FlicDecodeContext),
|
|
.init = flic_decode_init,
|
|
.close = flic_decode_end,
|
|
.decode = flic_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
};
|