749 lines
28 KiB
C
749 lines
28 KiB
C
/*
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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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/**
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* @file flic.c
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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 and maybe one day RGB24
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* colorspace data, depending on the FLC. 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 <unistd.h>
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#include "common.h"
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#include "avcodec.h"
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#include "bswap.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_INFO, "Problem: pixel_ptr >= pixel_limit (%d >= %d)\n", \
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pixel_ptr + n, pixel_limit); \
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return -1; \
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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 int flic_decode_init(AVCodecContext *avctx)
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{
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FlicDecodeContext *s = (FlicDecodeContext *)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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s->avctx = avctx;
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avctx->has_b_frames = 0;
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s->fli_type = LE_16(&fli_header[4]); /* Might be overridden if a Magic Carpet FLC */
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depth = LE_16(&fli_header[12]);
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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->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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} else if (s->avctx->extradata_size != 128) {
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av_log(avctx, AV_LOG_ERROR, "Expected extradata of 12 or 128 bytes\n");
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return -1;
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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 = PIX_FMT_PAL8; break;
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case 15 : avctx->pix_fmt = PIX_FMT_RGB555; break;
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case 16 : avctx->pix_fmt = PIX_FMT_RGB565; break;
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case 24 : avctx->pix_fmt = PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */
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av_log(avctx, AV_LOG_ERROR, "24Bpp FLC/FLX is unsupported due to no test files.\n");
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return -1;
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break;
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default :
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av_log(avctx, AV_LOG_ERROR, "Unkown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
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return -1;
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}
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s->frame.data[0] = NULL;
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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 *data_size,
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uint8_t *buf, int buf_size)
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{
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FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
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int stream_ptr = 0;
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int stream_ptr_after_color_chunk;
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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;
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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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signed short line_packets;
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int y_ptr;
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signed char 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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int pixel_limit;
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s->frame.reference = 1;
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s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
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if (avctx->reget_buffer(avctx, &s->frame) < 0) {
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av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
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return -1;
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}
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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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frame_size = LE_32(&buf[stream_ptr]);
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stream_ptr += 6; /* skip the magic number */
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num_chunks = LE_16(&buf[stream_ptr]);
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stream_ptr += 10; /* skip padding */
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frame_size -= 16;
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/* iterate through the chunks */
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while ((frame_size > 0) && (num_chunks > 0)) {
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chunk_size = LE_32(&buf[stream_ptr]);
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stream_ptr += 4;
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chunk_type = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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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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stream_ptr_after_color_chunk = stream_ptr + chunk_size - 6;
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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 = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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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 += buf[stream_ptr++];
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/* next byte indicates how many entries to change */
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color_changes = buf[stream_ptr++];
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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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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 = buf[stream_ptr++] << color_shift;
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g = buf[stream_ptr++] << color_shift;
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b = buf[stream_ptr++] << color_shift;
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entry = (r << 16) | (g << 8) | b;
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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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/* color chunks sometimes have weird 16-bit alignment issues;
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* therefore, take the hardline approach and set the stream_ptr
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* to the value calculated w.r.t. the size specified by the color
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* chunk header */
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stream_ptr = stream_ptr_after_color_chunk;
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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 = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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while (compressed_lines > 0) {
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line_packets = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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if (line_packets < 0) {
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line_packets = -line_packets;
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y_ptr += line_packets * s->frame.linesize[0];
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} else {
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compressed_lines--;
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pixel_ptr = y_ptr;
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pixel_countdown = s->avctx->width;
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for (i = 0; i < line_packets; i++) {
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/* account for the skip bytes */
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pixel_skip = buf[stream_ptr++];
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pixel_ptr += pixel_skip;
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pixel_countdown -= pixel_skip;
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byte_run = buf[stream_ptr++];
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if (byte_run < 0) {
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byte_run = -byte_run;
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palette_idx1 = buf[stream_ptr++];
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palette_idx2 = buf[stream_ptr++];
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CHECK_PIXEL_PTR(byte_run);
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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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for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
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palette_idx1 = buf[stream_ptr++];
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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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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 = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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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 = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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while (compressed_lines > 0) {
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pixel_ptr = y_ptr;
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pixel_countdown = s->avctx->width;
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line_packets = buf[stream_ptr++];
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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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pixel_skip = buf[stream_ptr++];
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pixel_ptr += pixel_skip;
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pixel_countdown -= pixel_skip;
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byte_run = buf[stream_ptr++];
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if (byte_run > 0) {
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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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palette_idx1 = buf[stream_ptr++];
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pixels[pixel_ptr++] = palette_idx1;
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}
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} else {
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byte_run = -byte_run;
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palette_idx1 = buf[stream_ptr++];
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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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stream_ptr++;
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pixel_countdown = s->avctx->width;
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while (pixel_countdown > 0) {
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byte_run = buf[stream_ptr++];
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if (byte_run > 0) {
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palette_idx1 = buf[stream_ptr++];
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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)\n",
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pixel_countdown);
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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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for (j = 0; j < byte_run; j++) {
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palette_idx1 = buf[stream_ptr++];
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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)\n",
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pixel_countdown);
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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 > s->avctx->width * 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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"bigger than image, skipping chunk\n", chunk_size - 6);
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stream_ptr += 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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memcpy(&pixels[y_ptr], &buf[stream_ptr],
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s->avctx->width);
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stream_ptr += s->avctx->width;
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}
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}
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break;
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case FLI_MINI:
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/* some sort of a thumbnail? disregard this chunk... */
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stream_ptr += chunk_size - 6;
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break;
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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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frame_size -= chunk_size;
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num_chunks--;
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}
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/* by the end of the chunk, the stream ptr should equal the frame
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* size (minus 1, possibly); if it doesn't, issue a warning */
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if ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
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av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
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"and final chunk ptr = %d\n", buf_size, stream_ptr);
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/* make the palette available on the way out */
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memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
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if (s->new_palette) {
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s->frame.palette_has_changed = 1;
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s->new_palette = 0;
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}
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*data_size=sizeof(AVFrame);
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*(AVFrame*)data = s->frame;
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return buf_size;
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}
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static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
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void *data, int *data_size,
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uint8_t *buf, int buf_size)
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{
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/* Note, the only difference between the 15Bpp and 16Bpp */
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/* Format is the pixel format, the packets are processed the same. */
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FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
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int stream_ptr = 0;
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int pixel_ptr;
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unsigned char palette_idx1;
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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;
|
|
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int lines;
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int compressed_lines;
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signed short line_packets;
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int y_ptr;
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signed char 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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int pixel;
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int pixel_limit;
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s->frame.reference = 1;
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s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
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if (avctx->reget_buffer(avctx, &s->frame) < 0) {
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av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
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return -1;
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}
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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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frame_size = LE_32(&buf[stream_ptr]);
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stream_ptr += 6; /* skip the magic number */
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num_chunks = LE_16(&buf[stream_ptr]);
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stream_ptr += 10; /* skip padding */
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frame_size -= 16;
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/* iterate through the chunks */
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while ((frame_size > 0) && (num_chunks > 0)) {
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chunk_size = LE_32(&buf[stream_ptr]);
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stream_ptr += 4;
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chunk_type = LE_16(&buf[stream_ptr]);
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stream_ptr += 2;
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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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/* For some reason, it seems that non-paletised flics do include one of these */
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/* chunks in their first frame. Why i do not know, it seems rather extraneous */
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/* av_log(avctx, AV_LOG_ERROR, "Unexpected Palette chunk %d in non-paletised FLC\n",chunk_type);*/
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stream_ptr = stream_ptr + chunk_size - 6;
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break;
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case FLI_DELTA:
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case FLI_DTA_LC:
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y_ptr = 0;
|
|
compressed_lines = LE_16(&buf[stream_ptr]);
|
|
stream_ptr += 2;
|
|
while (compressed_lines > 0) {
|
|
line_packets = LE_16(&buf[stream_ptr]);
|
|
stream_ptr += 2;
|
|
if (line_packets < 0) {
|
|
line_packets = -line_packets;
|
|
y_ptr += line_packets * s->frame.linesize[0];
|
|
} else {
|
|
compressed_lines--;
|
|
pixel_ptr = y_ptr;
|
|
pixel_countdown = s->avctx->width;
|
|
for (i = 0; i < line_packets; i++) {
|
|
/* account for the skip bytes */
|
|
pixel_skip = buf[stream_ptr++];
|
|
pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
|
|
pixel_countdown -= pixel_skip;
|
|
byte_run = buf[stream_ptr++];
|
|
if (byte_run < 0) {
|
|
byte_run = -byte_run;
|
|
pixel = LE_16(&buf[stream_ptr]);
|
|
stream_ptr += 2;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel;
|
|
pixel_ptr += 2;
|
|
}
|
|
} else {
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = LE_16(&buf[stream_ptr]);
|
|
stream_ptr += 2;
|
|
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-paletised FLC\n");
|
|
stream_ptr = stream_ptr + chunk_size - 6;
|
|
break;
|
|
|
|
case FLI_BLACK:
|
|
/* set the whole frame to 0x0000 which is balck in both 15Bpp and 16Bpp modes. */
|
|
memset(pixels, 0x0000,
|
|
s->frame.linesize[0] * s->avctx->height * 2);
|
|
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 */
|
|
stream_ptr++;
|
|
pixel_countdown = (s->avctx->width * 2);
|
|
|
|
while (pixel_countdown > 0) {
|
|
byte_run = buf[stream_ptr++];
|
|
if (byte_run > 0) {
|
|
palette_idx1 = buf[stream_ptr++];
|
|
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)\n",
|
|
pixel_countdown);
|
|
}
|
|
} else { /* copy bytes if byte_run < 0 */
|
|
byte_run = -byte_run;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
palette_idx1 = buf[stream_ptr++];
|
|
pixels[pixel_ptr++] = palette_idx1;
|
|
pixel_countdown--;
|
|
if (pixel_countdown < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
|
|
pixel_countdown);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
|
|
* This doesnt give us any good oportunity to perform word endian conversion
|
|
* during decompression. So if its requried (ie, this isnt a LE target, we do
|
|
* a second pass over the line here, swapping the bytes.
|
|
*/
|
|
pixel = 0xFF00;
|
|
if (0xFF00 != LE_16(&pixel)) /* Check if its not an LE Target */
|
|
{
|
|
pixel_ptr = y_ptr;
|
|
pixel_countdown = s->avctx->width;
|
|
while (pixel_countdown > 0) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = LE_16(&buf[pixel_ptr]);
|
|
pixel_ptr += 2;
|
|
}
|
|
}
|
|
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 */
|
|
stream_ptr++;
|
|
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
|
|
|
|
while (pixel_countdown > 0) {
|
|
byte_run = buf[stream_ptr++];
|
|
if (byte_run > 0) {
|
|
pixel = LE_16(&buf[stream_ptr]);
|
|
stream_ptr += 2;
|
|
CHECK_PIXEL_PTR(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;
|
|
CHECK_PIXEL_PTR(byte_run);
|
|
for (j = 0; j < byte_run; j++) {
|
|
*((signed short*)(&pixels[pixel_ptr])) = LE_16(&buf[stream_ptr]);
|
|
stream_ptr += 2;
|
|
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)(s->avctx->width * 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);
|
|
stream_ptr += 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])) = LE_16(&buf[stream_ptr+pixel_ptr]);
|
|
pixel_ptr += 2;
|
|
pixel_countdown--;
|
|
}
|
|
stream_ptr += s->avctx->width*2;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_MINI:
|
|
/* some sort of a thumbnail? disregard this chunk... */
|
|
stream_ptr += chunk_size - 6;
|
|
break;
|
|
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
|
|
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 ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
|
|
"and final chunk ptr = %d\n", buf_size, stream_ptr);
|
|
|
|
|
|
*data_size=sizeof(AVFrame);
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static int flic_decode_frame_24BPP(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
|
|
return -1;
|
|
}
|
|
|
|
static int flic_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
if (avctx->pix_fmt == PIX_FMT_PAL8) {
|
|
return flic_decode_frame_8BPP(avctx, data, data_size,
|
|
buf, buf_size);
|
|
}
|
|
else if ((avctx->pix_fmt == PIX_FMT_RGB555) ||
|
|
(avctx->pix_fmt == PIX_FMT_RGB565)) {
|
|
return flic_decode_frame_15_16BPP(avctx, data, data_size,
|
|
buf, buf_size);
|
|
}
|
|
else if (avctx->pix_fmt == PIX_FMT_BGR24) {
|
|
return flic_decode_frame_24BPP(avctx, data, data_size,
|
|
buf, buf_size);
|
|
}
|
|
|
|
/* Shouldnt get here, ever as the pix_fmt is processed */
|
|
/* in flic_decode_init and the above if should deal with */
|
|
/* the finite set of possibilites allowable by here. */
|
|
/* but in case we do, just error out. */
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown Format of FLC. My Science cant explain how this happened\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int flic_decode_end(AVCodecContext *avctx)
|
|
{
|
|
FlicDecodeContext *s = avctx->priv_data;
|
|
|
|
if (s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec flic_decoder = {
|
|
"flic",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_FLIC,
|
|
sizeof(FlicDecodeContext),
|
|
flic_decode_init,
|
|
NULL,
|
|
flic_decode_end,
|
|
flic_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|