static av_cold int flic_decode_init(AVCodecContext *avctx) { FlicDecodeContext *s = avctx->priv_data; unsigned char *fli_header = (unsigned char *)avctx->extradata; int depth; if (avctx->extradata_size != 12 && avctx->extradata_size != 128) { av_log(avctx, AV_LOG_ERROR, "Expected extradata of 12 or 128 bytes\n"); return AVERROR_INVALIDDATA; } s->avctx = avctx; s->fli_type = AV_RL16(&fli_header[4]); /* Might be overridden if a Magic Carpet FLC */ depth = 0; if (s->avctx->extradata_size == 12) { /* special case for magic carpet FLIs */ s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE; depth = 8; } else { depth = AV_RL16(&fli_header[12]); } if (depth == 0) { depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */ } if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) { depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */ } switch (depth) { case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break; case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break; case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break; case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */ av_log(avctx, AV_LOG_ERROR, "24Bpp FLC/FLX is unsupported due to no test files.\n"); return AVERROR_PATCHWELCOME; default : av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth); return AVERROR_INVALIDDATA; } s->frame.data[0] = NULL; s->new_palette = 0; return 0; }