0,0 → 1,677 |
/* |
* 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 <stdio.h> |
#include <stdlib.h> |
|
#include "libavutil/mem.h" |
#include "libavutil/pixdesc.h" |
#include "avcodec.h" |
#include "bytestream.h" |
#include "internal.h" |
#include "lcl.h" |
|
#if CONFIG_ZLIB_DECODER |
#include <zlib.h> |
#endif |
|
/* |
* Decoder context |
*/ |
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 |
z_stream 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; |
int zret = inflateReset(&c->zstream); |
if (zret != Z_OK) { |
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
return AVERROR_UNKNOWN; |
} |
c->zstream.next_in = (uint8_t *)src; |
c->zstream.avail_in = src_len; |
c->zstream.next_out = c->decomp_buf + offset; |
c->zstream.avail_out = c->decomp_size - offset; |
zret = inflate(&c->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)c->zstream.total_out) { |
av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n", |
expected, c->zstream.total_out); |
return AVERROR_UNKNOWN; |
} |
return c->zstream.total_out; |
} |
#endif |
|
|
/* |
* |
* Decode a frame |
* |
*/ |
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 char *encoded = (unsigned char *)buf; |
unsigned int pixel_ptr; |
int row, col; |
unsigned char *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; |
|
if ((ret = ff_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 == width * height * 3) { |
; |
} else if (c->flags & FLAG_MULTITHREAD) { |
mthread_inlen = AV_RL32(encoded); |
if (len < 8) { |
av_log(avctx, AV_LOG_ERROR, "len %d is too small\n", len); |
return AVERROR_INVALIDDATA; |
} |
mthread_inlen = FFMIN(mthread_inlen, len - 8); |
mthread_outlen = AV_RL32(encoded+4); |
mthread_outlen = FFMIN(mthread_outlen, c->decomp_size); |
mszh_dlen = mszh_decomp(encoded + 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(encoded + 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(encoded, 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, encoded, len); |
encoded = c->decomp_buf; |
} else { |
break; |
} |
} else if (c->flags & FLAG_MULTITHREAD) { |
mthread_inlen = AV_RL32(encoded); |
mthread_inlen = FFMIN(mthread_inlen, len - 8); |
mthread_outlen = AV_RL32(encoded+4); |
mthread_outlen = FFMIN(mthread_outlen, c->decomp_size); |
ret = zlib_decomp(avctx, encoded + 8, mthread_inlen, 0, mthread_outlen); |
if (ret < 0) return ret; |
ret = zlib_decomp(avctx, encoded + 8 + mthread_inlen, len - 8 - mthread_inlen, |
mthread_outlen, mthread_outlen); |
if (ret < 0) return ret; |
} else { |
int ret = zlib_decomp(avctx, encoded, 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]; |
u_out = frame->data[1] + (height - 1) * frame->linesize[1]; |
v_out = frame->data[2] + (height - 1) * frame->linesize[2]; |
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: |
for (row = height - 1; row >= 0; row--) { |
pixel_ptr = row * frame->linesize[0]; |
memcpy(outptr + pixel_ptr, encoded, 3 * width); |
encoded += 3 * width; |
} |
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; |
} |
|
*got_frame = 1; |
|
/* always report that the buffer was completely consumed */ |
return buf_size; |
} |
|
/* |
* |
* Init lcl decoder |
* |
*/ |
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\n"); |
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\n"); |
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)) == NULL) { |
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) { |
int zret; |
c->zstream.zalloc = Z_NULL; |
c->zstream.zfree = Z_NULL; |
c->zstream.opaque = Z_NULL; |
zret = inflateInit(&c->zstream); |
if (zret != Z_OK) { |
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret); |
av_freep(&c->decomp_buf); |
return AVERROR_UNKNOWN; |
} |
} |
#endif |
|
return 0; |
} |
|
/* |
* |
* Uninit lcl decoder |
* |
*/ |
static av_cold int decode_end(AVCodecContext *avctx) |
{ |
LclDecContext * const c = avctx->priv_data; |
|
av_freep(&c->decomp_buf); |
#if CONFIG_ZLIB_DECODER |
if (avctx->codec_id == AV_CODEC_ID_ZLIB) |
inflateEnd(&c->zstream); |
#endif |
|
return 0; |
} |
|
#if CONFIG_MSZH_DECODER |
AVCodec ff_mszh_decoder = { |
.name = "mszh", |
.long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) MSZH"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_MSZH, |
.priv_data_size = sizeof(LclDecContext), |
.init = decode_init, |
.close = decode_end, |
.decode = decode_frame, |
.capabilities = CODEC_CAP_DR1, |
}; |
#endif |
|
#if CONFIG_ZLIB_DECODER |
AVCodec ff_zlib_decoder = { |
.name = "zlib", |
.long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) ZLIB"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_ZLIB, |
.priv_data_size = sizeof(LclDecContext), |
.init = decode_init, |
.close = decode_end, |
.decode = decode_frame, |
.capabilities = CODEC_CAP_DR1, |
}; |
#endif |