* LCL (LossLess Codec Library) Codec
* Copyright (c) 2002-2004 Roberto Togni
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/lcldec.c
+ * @file
* LCL (LossLess Codec Library) Video Codec
* Decoder for MSZH and ZLIB codecs
* Experimental encoder for ZLIB RGB24
/**
- * \param srcptr compressed source buffer, must be padded with at least 5 extra bytes
- * \param destptr must be padded sufficiently for av_memcpy_backptr
+ * @param srcptr compressed source buffer, must be padded with at least 5 extra bytes
+ * @param destptr must be padded sufficiently for av_memcpy_backptr
*/
static unsigned int mszh_decomp(const unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
{
const unsigned char *srcptr_end = srcptr + srclen;
unsigned mask = *srcptr++;
unsigned maskbit = 0x80;
- unsigned int ofs, cnt;
while (srcptr < srcptr_end && destptr < destptr_end) {
if (!(mask & maskbit)) {
destptr += 4;
srcptr += 4;
} else {
- ofs = bytestream_get_le16(&srcptr);
- cnt = (ofs >> 11) + 1;
+ unsigned ofs = bytestream_get_le16(&srcptr);
+ unsigned cnt = (ofs >> 11) + 1;
ofs &= 0x7ff;
+ ofs = FFMIN(ofs, destptr - destptr_bak);
cnt *= 4;
cnt = FFMIN(cnt, destptr_end - destptr);
av_memcpy_backptr(destptr, ofs, cnt);
maskbit >>= 1;
if (!maskbit) {
mask = *srcptr++;
+ while (!mask) {
+ if (destptr_end - destptr < 32 || srcptr_end - srcptr < 32) break;
+ memcpy(destptr, srcptr, 32);
+ destptr += 32;
+ srcptr += 32;
+ mask = *srcptr++;
+ }
maskbit = 0x80;
}
}
}
+#if CONFIG_ZLIB_DECODER
/**
- * \brief decompress a zlib-compressed data block into decomp_buf
- * \param src compressed input buffer
- * \param src_len data length in input buffer
- * \param offset offset in decomp_buf
- * \param expected expected decompressed length
+ * @brief decompress a zlib-compressed data block into decomp_buf
+ * @param src compressed input buffer
+ * @param src_len data length in input buffer
+ * @param offset offset in decomp_buf
+ * @param expected expected decompressed length
*/
static int zlib_decomp(AVCodecContext *avctx, const uint8_t *src, int src_len, int offset, int expected)
{
}
return c->zstream.total_out;
}
+#endif
/*
len = mszh_dlen;
}
break;
- case COMP_MSZH_NOCOMP:
+ case COMP_MSZH_NOCOMP: {
+ int bppx2;
+ switch (c->imgtype) {
+ case IMGTYPE_YUV111:
+ case IMGTYPE_RGB24:
+ bppx2 = 6;
+ break;
+ case IMGTYPE_YUV422:
+ case IMGTYPE_YUV211:
+ bppx2 = 4;
+ break;
+ case IMGTYPE_YUV411:
+ case IMGTYPE_YUV420:
+ bppx2 = 3;
+ break;
+ default:
+ bppx2 = 0; // will error out below
+ break;
+ }
+ if (len < ((width * height * bppx2) >> 1))
+ return AVERROR_INVALIDDATA;
break;
+ }
default:
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
return -1;
* gives a file with ZLIB fourcc, but frame is really uncompressed.
* To be sure that's true check also frame size */
if (c->compression == COMP_ZLIB_NORMAL && c->imgtype == IMGTYPE_RGB24 &&
- len == width * height * 3)
- break;
- if (c->flags & FLAG_MULTITHREAD) {
+ len == width * height * 3) {
+ if (c->flags & FLAG_PNGFILTER) {
+ memcpy(c->decomp_buf, encoded, len);
+ encoded = c->decomp_buf;
+ } else {
+ break;
+ }
+ } else if (c->flags & FLAG_MULTITHREAD) {
int ret;
mthread_inlen = AV_RL32(encoded);
mthread_inlen = FFMIN(mthread_inlen, len - 8);
unsigned int max_basesize = FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) + AV_LZO_OUTPUT_PADDING;
unsigned int max_decomp_size;
- c->pic.data[0] = NULL;
-
-#if CONFIG_ZLIB_DECODER
- // Needed if zlib unused or init aborted before inflateInit
- memset(&c->zstream, 0, sizeof(z_stream));
-#endif
-
if (avctx->extradata_size < 8) {
av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
- return 1;
- }
-
- if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
- return 1;
+ return AVERROR_INVALIDDATA;
}
/* Check codec type */
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
- return 1;
+ return AVERROR_INVALIDDATA;
}
/* Detect compression method */
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
- return 1;
+ return AVERROR_INVALIDDATA;
}
break;
#if CONFIG_ZLIB_DECODER
default:
if (c->compression < Z_NO_COMPRESSION || c->compression > Z_BEST_COMPRESSION) {
av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
- return 1;
+ return AVERROR_INVALIDDATA;
}
av_log(avctx, AV_LOG_DEBUG, "Compression level for ZLIB: (%d).\n", c->compression);
}
#endif
default:
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
- return 1;
+ return AVERROR_INVALIDDATA;
}
/* Allocate decompression buffer */
if (c->decomp_size) {
if ((c->decomp_buf = av_malloc(max_decomp_size)) == NULL) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
- return 1;
+ return AVERROR(ENOMEM);
}
}
zret = inflateInit(&c->zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
- return 1;
+ av_freep(&c->decomp_buf);
+ return AVERROR_UNKNOWN;
}
}
#endif
{
LclDecContext * const c = avctx->priv_data;
+ av_freep(&c->decomp_buf);
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
#if CONFIG_ZLIB_DECODER
- inflateEnd(&c->zstream);
+ if (avctx->codec_id == CODEC_ID_ZLIB)
+ inflateEnd(&c->zstream);
#endif
return 0;
}
#if CONFIG_MSZH_DECODER
-AVCodec mszh_decoder = {
- "mszh",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MSZH,
- sizeof(LclDecContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_mszh_decoder = {
+ .name = "mszh",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_MSZH,
+ .priv_data_size = sizeof(LclDecContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) MSZH"),
};
#endif
#if CONFIG_ZLIB_DECODER
-AVCodec zlib_decoder = {
- "zlib",
- CODEC_TYPE_VIDEO,
- CODEC_ID_ZLIB,
- sizeof(LclDecContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_zlib_decoder = {
+ .name = "zlib",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_ZLIB,
+ .priv_data_size = sizeof(LclDecContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) ZLIB"),
};
#endif
projects / ffmpeg / blobdiff