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FFmpeg/libavcodec/lcldec.c
Andreas Rheinhardt 20f9727018 avcodec/codec_internal: Add FFCodec, hide internal part of AVCodec 
Up until now, codec.h contains both public and private parts
of AVCodec. This exposes the internals of AVCodec to users
and leads them into the temptation of actually using them
and forces us to forward-declare structures and types that
users can't use at all.

This commit changes this by adding a new structure FFCodec to
codec_internal.h that extends AVCodec, i.e. contains the public
AVCodec as first member; the private fields of AVCodec are moved
to this structure, leaving codec.h clean.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-03-21 01:33:09 +01:00

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/*
* LCL (LossLess Codec Library) Codec
* Copyright (c) 2002-2004 Roberto Togni
*
* This file is part of FFmpeg.
*
* FFmpeg 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* LCL (LossLess Codec Library) Video Codec
* Decoder for MSZH and ZLIB codecs
* Experimental encoder for ZLIB RGB24
*
* Fourcc: MSZH, ZLIB
*
* Original Win32 dll:
* Ver2.23 By Kenji Oshima 2000.09.20
* avimszh.dll, avizlib.dll
*
* A description of the decoding algorithm can be found here:
* http://www.pcisys.net/~melanson/codecs
*
* Supports: BGR24 (RGB 24bpp)
*/
#include "config_components.h"
#include <stdio.h>
#include <stdlib.h>
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "lcl.h"
#include "thread.h"
#if CONFIG_ZLIB_DECODER
#include "zlib_wrapper.h"
#include <zlib.h>
#endif
typedef struct LclDecContext {
// Image type
int imgtype;
// Compression type
int compression;
// Flags
int flags;
// Decompressed data size
unsigned int decomp_size;
// Decompression buffer
unsigned char* decomp_buf;
#if CONFIG_ZLIB_DECODER
FFZStream zstream;
#endif
} LclDecContext;
/**
* @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)
{
unsigned char *destptr_bak = destptr;
unsigned char *destptr_end = destptr + destsize;
const unsigned char *srcptr_end = srcptr + srclen;
unsigned mask = *srcptr++;
unsigned maskbit = 0x80;
while (srcptr < srcptr_end && destptr < destptr_end) {
if (!(mask & maskbit)) {
memcpy(destptr, srcptr, 4);
destptr += 4;
srcptr += 4;
} else {
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);
if (ofs) {
av_memcpy_backptr(destptr, ofs, cnt);
} else {
// Not known what the correct behaviour is, but
// this at least avoids uninitialized data.
memset(destptr, 0, cnt);
}
destptr += 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;
}
}
return destptr - destptr_bak;
}
#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
*/
static int zlib_decomp(AVCodecContext *avctx, const uint8_t *src, int src_len, int offset, int expected)
{
LclDecContext *c = avctx->priv_data;
z_stream *const zstream = &c->zstream.zstream;
int zret = inflateReset(zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
return AVERROR_UNKNOWN;
}
zstream->next_in = src;
zstream->avail_in = src_len;
zstream->next_out = c->decomp_buf + offset;
zstream->avail_out = c->decomp_size - offset;
zret = inflate(zstream, Z_FINISH);
if (zret != Z_OK && zret != Z_STREAM_END) {
av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
return AVERROR_UNKNOWN;
}
if (expected != (unsigned int)zstream->total_out) {
av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
expected, zstream->total_out);
return AVERROR_UNKNOWN;
}
return zstream->total_out;
}
#endif
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
LclDecContext * const c = avctx->priv_data;
unsigned int pixel_ptr;
int row, col;
unsigned char *encoded = avpkt->data, *outptr;
uint8_t *y_out, *u_out, *v_out;
unsigned int width = avctx->width; // Real image width
unsigned int height = avctx->height; // Real image height
unsigned int mszh_dlen;
unsigned char yq, y1q, uq, vq;
int uqvq, ret;
unsigned int mthread_inlen, mthread_outlen;
unsigned int len = buf_size;
int linesize, offset;
if ((ret = ff_thread_get_buffer(avctx, frame, 0)) < 0)
return ret;
outptr = frame->data[0]; // Output image pointer
/* Decompress frame */
switch (avctx->codec_id) {
case AV_CODEC_ID_MSZH:
switch (c->compression) {
case COMP_MSZH:
if (c->imgtype == IMGTYPE_RGB24 && len == FFALIGN(width * 3, 4) * height ||
c->imgtype == IMGTYPE_YUV111 && len == width * height * 3) {
;
} else if (c->flags & FLAG_MULTITHREAD) {
mthread_inlen = AV_RL32(buf);
if (len < 8 || len - 8 < mthread_inlen) {
av_log(avctx, AV_LOG_ERROR, "len %d is too small\n", len);
return AVERROR_INVALIDDATA;
}
mthread_outlen = AV_RL32(buf + 4);
mthread_outlen = FFMIN(mthread_outlen, c->decomp_size);
mszh_dlen = mszh_decomp(buf + 8, mthread_inlen, c->decomp_buf, c->decomp_size);
if (mthread_outlen != mszh_dlen) {
av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n",
mthread_outlen, mszh_dlen);
return AVERROR_INVALIDDATA;
}
mszh_dlen = mszh_decomp(buf + 8 + mthread_inlen, len - 8 - mthread_inlen,
c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen);
if (mthread_outlen != mszh_dlen) {
av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n",
mthread_outlen, mszh_dlen);
return AVERROR_INVALIDDATA;
}
encoded = c->decomp_buf;
len = c->decomp_size;
} else {
mszh_dlen = mszh_decomp(buf, len, c->decomp_buf, c->decomp_size);
if (c->decomp_size != mszh_dlen) {
av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n",
c->decomp_size, mszh_dlen);
return AVERROR_INVALIDDATA;
}
encoded = c->decomp_buf;
len = mszh_dlen;
}
break;
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 AVERROR_INVALIDDATA;
}
break;
#if CONFIG_ZLIB_DECODER
case AV_CODEC_ID_ZLIB:
/* Using the original dll with normal compression (-1) and RGB format
* 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) {
if (c->flags & FLAG_PNGFILTER) {
memcpy(c->decomp_buf, buf, len);
encoded = c->decomp_buf;
} else {
break;
}
} else if (c->flags & FLAG_MULTITHREAD) {
mthread_inlen = AV_RL32(buf);
mthread_inlen = FFMIN(mthread_inlen, len - 8);
mthread_outlen = AV_RL32(buf + 4);
mthread_outlen = FFMIN(mthread_outlen, c->decomp_size);
ret = zlib_decomp(avctx, buf + 8, mthread_inlen, 0, mthread_outlen);
if (ret < 0) return ret;
ret = zlib_decomp(avctx, buf + 8 + mthread_inlen, len - 8 - mthread_inlen,
mthread_outlen, mthread_outlen);
if (ret < 0) return ret;
} else {
int ret = zlib_decomp(avctx, buf, len, 0, c->decomp_size);
if (ret < 0) return ret;
}
encoded = c->decomp_buf;
len = c->decomp_size;
break;
#endif
default:
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
return AVERROR_INVALIDDATA;
}
/* Apply PNG filter */
if (avctx->codec_id == AV_CODEC_ID_ZLIB && (c->flags & FLAG_PNGFILTER)) {
switch (c->imgtype) {
case IMGTYPE_YUV111:
case IMGTYPE_RGB24:
for (row = 0; row < height; row++) {
pixel_ptr = row * width * 3;
yq = encoded[pixel_ptr++];
uqvq = AV_RL16(encoded+pixel_ptr);
pixel_ptr += 2;
for (col = 1; col < width; col++) {
encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
uqvq -= AV_RL16(encoded+pixel_ptr+1);
AV_WL16(encoded+pixel_ptr+1, uqvq);
pixel_ptr += 3;
}
}
break;
case IMGTYPE_YUV422:
for (row = 0; row < height; row++) {
pixel_ptr = row * width * 2;
yq = uq = vq =0;
for (col = 0; col < width/4; col++) {
encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
pixel_ptr += 8;
}
}
break;
case IMGTYPE_YUV411:
for (row = 0; row < height; row++) {
pixel_ptr = row * width / 2 * 3;
yq = uq = vq =0;
for (col = 0; col < width/4; col++) {
encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
pixel_ptr += 6;
}
}
break;
case IMGTYPE_YUV211:
for (row = 0; row < height; row++) {
pixel_ptr = row * width * 2;
yq = uq = vq =0;
for (col = 0; col < width/2; col++) {
encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
pixel_ptr += 4;
}
}
break;
case IMGTYPE_YUV420:
for (row = 0; row < height/2; row++) {
pixel_ptr = row * width * 3;
yq = y1q = uq = vq =0;
for (col = 0; col < width/2; col++) {
encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
pixel_ptr += 6;
}
}
break;
default:
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n");
return AVERROR_INVALIDDATA;
}
}
/* Convert colorspace */
y_out = frame->data[0] + (height - 1) * frame->linesize[0];
offset = (height - 1) * frame->linesize[1];
u_out = FF_PTR_ADD(frame->data[1], offset);
offset = (height - 1) * frame->linesize[2];
v_out = FF_PTR_ADD(frame->data[2], offset);
switch (c->imgtype) {
case IMGTYPE_YUV111:
for (row = 0; row < height; row++) {
for (col = 0; col < width; col++) {
y_out[col] = *encoded++;
u_out[col] = *encoded++ + 128;
v_out[col] = *encoded++ + 128;
}
y_out -= frame->linesize[0];
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
}
break;
case IMGTYPE_YUV422:
for (row = 0; row < height; row++) {
for (col = 0; col < width - 3; col += 4) {
memcpy(y_out + col, encoded, 4);
encoded += 4;
u_out[ col >> 1 ] = *encoded++ + 128;
u_out[(col >> 1) + 1] = *encoded++ + 128;
v_out[ col >> 1 ] = *encoded++ + 128;
v_out[(col >> 1) + 1] = *encoded++ + 128;
}
y_out -= frame->linesize[0];
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
}
break;
case IMGTYPE_RGB24:
linesize = len < FFALIGN(3 * width, 4) * height ? 3 * width : FFALIGN(3 * width, 4);
for (row = height - 1; row >= 0; row--) {
pixel_ptr = row * frame->linesize[0];
memcpy(outptr + pixel_ptr, encoded, 3 * width);
encoded += linesize;
}
break;
case IMGTYPE_YUV411:
for (row = 0; row < height; row++) {
for (col = 0; col < width - 3; col += 4) {
memcpy(y_out + col, encoded, 4);
encoded += 4;
u_out[col >> 2] = *encoded++ + 128;
v_out[col >> 2] = *encoded++ + 128;
}
y_out -= frame->linesize[0];
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
}
break;
case IMGTYPE_YUV211:
for (row = 0; row < height; row++) {
for (col = 0; col < width - 1; col += 2) {
memcpy(y_out + col, encoded, 2);
encoded += 2;
u_out[col >> 1] = *encoded++ + 128;
v_out[col >> 1] = *encoded++ + 128;
}
y_out -= frame->linesize[0];
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
}
break;
case IMGTYPE_YUV420:
u_out = frame->data[1] + ((height >> 1) - 1) * frame->linesize[1];
v_out = frame->data[2] + ((height >> 1) - 1) * frame->linesize[2];
for (row = 0; row < height - 1; row += 2) {
for (col = 0; col < width - 1; col += 2) {
memcpy(y_out + col, encoded, 2);
encoded += 2;
memcpy(y_out + col - frame->linesize[0], encoded, 2);
encoded += 2;
u_out[col >> 1] = *encoded++ + 128;
v_out[col >> 1] = *encoded++ + 128;
}
y_out -= frame->linesize[0] << 1;
u_out -= frame->linesize[1];
v_out -= frame->linesize[2];
}
break;
default:
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
return AVERROR_INVALIDDATA;
}
frame->key_frame = 1;
frame->pict_type = AV_PICTURE_TYPE_I;
*got_frame = 1;
/* always report that the buffer was completely consumed */
return buf_size;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
LclDecContext * const c = avctx->priv_data;
unsigned int basesize = avctx->width * avctx->height;
unsigned int max_basesize = FFALIGN(avctx->width, 4) *
FFALIGN(avctx->height, 4);
unsigned int max_decomp_size;
int subsample_h, subsample_v;
if (avctx->extradata_size < 8) {
av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
return AVERROR_INVALIDDATA;
}
/* Check codec type */
if ((avctx->codec_id == AV_CODEC_ID_MSZH && avctx->extradata[7] != CODEC_MSZH) ||
(avctx->codec_id == AV_CODEC_ID_ZLIB && avctx->extradata[7] != CODEC_ZLIB)) {
av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n");
}
/* Detect image type */
switch (c->imgtype = avctx->extradata[4]) {
case IMGTYPE_YUV111:
c->decomp_size = basesize * 3;
max_decomp_size = max_basesize * 3;
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 1:1:1.\n");
break;
case IMGTYPE_YUV422:
c->decomp_size = basesize * 2;
max_decomp_size = max_basesize * 2;
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:2.\n");
if (avctx->width % 4) {
avpriv_request_sample(avctx, "Unsupported dimensions");
return AVERROR_INVALIDDATA;
}
break;
case IMGTYPE_RGB24:
c->decomp_size = basesize * 3;
max_decomp_size = max_basesize * 3;
avctx->pix_fmt = AV_PIX_FMT_BGR24;
av_log(avctx, AV_LOG_DEBUG, "Image type is RGB 24.\n");
break;
case IMGTYPE_YUV411:
c->decomp_size = basesize / 2 * 3;
max_decomp_size = max_basesize / 2 * 3;
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:1:1.\n");
break;
case IMGTYPE_YUV211:
c->decomp_size = basesize * 2;
max_decomp_size = max_basesize * 2;
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 2:1:1.\n");
break;
case IMGTYPE_YUV420:
c->decomp_size = basesize / 2 * 3;
max_decomp_size = max_basesize / 2 * 3;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:0.\n");
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
return AVERROR_INVALIDDATA;
}
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &subsample_h, &subsample_v);
if (avctx->width % (1<<subsample_h) || avctx->height % (1<<subsample_v)) {
avpriv_request_sample(avctx, "Unsupported dimensions");
return AVERROR_INVALIDDATA;
}
/* Detect compression method */
c->compression = (int8_t)avctx->extradata[5];
switch (avctx->codec_id) {
case AV_CODEC_ID_MSZH:
switch (c->compression) {
case COMP_MSZH:
av_log(avctx, AV_LOG_DEBUG, "Compression enabled.\n");
break;
case COMP_MSZH_NOCOMP:
c->decomp_size = 0;
av_log(avctx, AV_LOG_DEBUG, "No compression.\n");
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
return AVERROR_INVALIDDATA;
}
break;
#if CONFIG_ZLIB_DECODER
case AV_CODEC_ID_ZLIB:
switch (c->compression) {
case COMP_ZLIB_HISPEED:
av_log(avctx, AV_LOG_DEBUG, "High speed compression.\n");
break;
case COMP_ZLIB_HICOMP:
av_log(avctx, AV_LOG_DEBUG, "High compression.\n");
break;
case COMP_ZLIB_NORMAL:
av_log(avctx, AV_LOG_DEBUG, "Normal compression.\n");
break;
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 AVERROR_INVALIDDATA;
}
av_log(avctx, AV_LOG_DEBUG, "Compression level for ZLIB: (%d).\n", c->compression);
}
break;
#endif
default:
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
return AVERROR_INVALIDDATA;
}
/* Allocate decompression buffer */
if (c->decomp_size) {
if (!(c->decomp_buf = av_malloc(max_decomp_size))) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
return AVERROR(ENOMEM);
}
}
/* Detect flags */
c->flags = avctx->extradata[6];
if (c->flags & FLAG_MULTITHREAD)
av_log(avctx, AV_LOG_DEBUG, "Multithread encoder flag set.\n");
if (c->flags & FLAG_NULLFRAME)
av_log(avctx, AV_LOG_DEBUG, "Nullframe insertion flag set.\n");
if (avctx->codec_id == AV_CODEC_ID_ZLIB && (c->flags & FLAG_PNGFILTER))
av_log(avctx, AV_LOG_DEBUG, "PNG filter flag set.\n");
if (c->flags & FLAGMASK_UNUSED)
av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags);
/* If needed init zlib */
#if CONFIG_ZLIB_DECODER
if (avctx->codec_id == AV_CODEC_ID_ZLIB)
return ff_inflate_init(&c->zstream, avctx);
#endif
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
LclDecContext * const c = avctx->priv_data;
av_freep(&c->decomp_buf);
#if CONFIG_ZLIB_DECODER
ff_inflate_end(&c->zstream);
#endif
return 0;
}
#if CONFIG_MSZH_DECODER
const FFCodec ff_mszh_decoder = {
.p.name = "mszh",
.p.long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) MSZH"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_MSZH,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
.priv_data_size = sizeof(LclDecContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};
#endif
#if CONFIG_ZLIB_DECODER
const FFCodec ff_zlib_decoder = {
.p.name = "zlib",
.p.long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) ZLIB"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_ZLIB,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
.priv_data_size = sizeof(LclDecContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};
#endif
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