mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
160d679c07
Originally committed as revision 4153 to svn://svn.ffmpeg.org/ffmpeg/trunk
923 lines
31 KiB
C
923 lines
31 KiB
C
/*
|
|
* LCL (LossLess Codec Library) Codec
|
|
* Copyright (c) 2002-2004 Roberto Togni
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* @file lcl.c
|
|
* 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 "common.h"
|
|
#include "bitstream.h"
|
|
#include "avcodec.h"
|
|
|
|
#ifdef CONFIG_ZLIB
|
|
#include <zlib.h>
|
|
#endif
|
|
|
|
|
|
#define BMPTYPE_YUV 1
|
|
#define BMPTYPE_RGB 2
|
|
|
|
#define IMGTYPE_YUV111 0
|
|
#define IMGTYPE_YUV422 1
|
|
#define IMGTYPE_RGB24 2
|
|
#define IMGTYPE_YUV411 3
|
|
#define IMGTYPE_YUV211 4
|
|
#define IMGTYPE_YUV420 5
|
|
|
|
#define COMP_MSZH 0
|
|
#define COMP_MSZH_NOCOMP 1
|
|
#define COMP_ZLIB_HISPEED 1
|
|
#define COMP_ZLIB_HICOMP 9
|
|
#define COMP_ZLIB_NORMAL -1
|
|
|
|
#define FLAG_MULTITHREAD 1
|
|
#define FLAG_NULLFRAME 2
|
|
#define FLAG_PNGFILTER 4
|
|
#define FLAGMASK_UNUSED 0xf8
|
|
|
|
#define CODEC_MSZH 1
|
|
#define CODEC_ZLIB 3
|
|
|
|
#define FOURCC_MSZH mmioFOURCC('M','S','Z','H')
|
|
#define FOURCC_ZLIB mmioFOURCC('Z','L','I','B')
|
|
|
|
/*
|
|
* Decoder context
|
|
*/
|
|
typedef struct LclContext {
|
|
|
|
AVCodecContext *avctx;
|
|
AVFrame pic;
|
|
PutBitContext pb;
|
|
|
|
// Image type
|
|
int imgtype;
|
|
// Compression type
|
|
int compression;
|
|
// Flags
|
|
int flags;
|
|
// Decompressed data size
|
|
unsigned int decomp_size;
|
|
// Decompression buffer
|
|
unsigned char* decomp_buf;
|
|
// Maximum compressed data size
|
|
unsigned int max_comp_size;
|
|
// Compression buffer
|
|
unsigned char* comp_buf;
|
|
#ifdef CONFIG_ZLIB
|
|
z_stream zstream;
|
|
#endif
|
|
} LclContext;
|
|
|
|
|
|
/*
|
|
*
|
|
* Helper functions
|
|
*
|
|
*/
|
|
static inline unsigned char fix (int pix14)
|
|
{
|
|
int tmp;
|
|
|
|
tmp = (pix14 + 0x80000) >> 20;
|
|
if (tmp < 0)
|
|
return 0;
|
|
if (tmp > 255)
|
|
return 255;
|
|
return tmp;
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned char get_b (unsigned char yq, signed char bq)
|
|
{
|
|
return fix((yq << 20) + bq * 1858076);
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
|
|
{
|
|
return fix((yq << 20) - bq * 360857 - rq * 748830);
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned char get_r (unsigned char yq, signed char rq)
|
|
{
|
|
return fix((yq << 20) + rq * 1470103);
|
|
}
|
|
|
|
|
|
|
|
static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
|
|
{
|
|
unsigned char *destptr_bak = destptr;
|
|
unsigned char *destptr_end = destptr + destsize;
|
|
unsigned char mask = 0;
|
|
unsigned char maskbit = 0;
|
|
unsigned int ofs, cnt;
|
|
|
|
while ((srclen > 0) && (destptr < destptr_end)) {
|
|
if (maskbit == 0) {
|
|
mask = *(srcptr++);
|
|
maskbit = 8;
|
|
srclen--;
|
|
continue;
|
|
}
|
|
if ((mask & (1 << (--maskbit))) == 0) {
|
|
if (destptr + 4 > destptr_end)
|
|
break;
|
|
*(int*)destptr = *(int*)srcptr;
|
|
srclen -= 4;
|
|
destptr += 4;
|
|
srcptr += 4;
|
|
} else {
|
|
ofs = *(srcptr++);
|
|
cnt = *(srcptr++);
|
|
ofs += cnt * 256;;
|
|
cnt = ((cnt >> 3) & 0x1f) + 1;
|
|
ofs &= 0x7ff;
|
|
srclen -= 2;
|
|
cnt *= 4;
|
|
if (destptr + cnt > destptr_end) {
|
|
cnt = destptr_end - destptr;
|
|
}
|
|
for (; cnt > 0; cnt--) {
|
|
*(destptr) = *(destptr - ofs);
|
|
destptr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
return (destptr - destptr_bak);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Decode a frame
|
|
*
|
|
*/
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
|
|
{
|
|
LclContext * const c = (LclContext *)avctx->priv_data;
|
|
unsigned char *encoded = (unsigned char *)buf;
|
|
unsigned int pixel_ptr;
|
|
int row, col;
|
|
unsigned char *outptr;
|
|
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;
|
|
unsigned int mthread_inlen, mthread_outlen;
|
|
#ifdef CONFIG_ZLIB
|
|
int zret; // Zlib return code
|
|
#endif
|
|
unsigned int len = buf_size;
|
|
|
|
if(c->pic.data[0])
|
|
avctx->release_buffer(avctx, &c->pic);
|
|
|
|
c->pic.reference = 0;
|
|
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
|
|
if(avctx->get_buffer(avctx, &c->pic) < 0){
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
outptr = c->pic.data[0]; // Output image pointer
|
|
|
|
/* Decompress frame */
|
|
switch (avctx->codec_id) {
|
|
case CODEC_ID_MSZH:
|
|
switch (c->compression) {
|
|
case COMP_MSZH:
|
|
if (c->flags & FLAG_MULTITHREAD) {
|
|
mthread_inlen = *((unsigned int*)encoded);
|
|
mthread_outlen = *((unsigned int*)(encoded+4));
|
|
if (mthread_outlen > c->decomp_size) // this should not happen
|
|
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 -1;
|
|
}
|
|
mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - 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 -1;
|
|
}
|
|
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 -1;
|
|
}
|
|
encoded = c->decomp_buf;
|
|
len = mszh_dlen;
|
|
}
|
|
break;
|
|
case COMP_MSZH_NOCOMP:
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case CODEC_ID_ZLIB:
|
|
#ifdef CONFIG_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))
|
|
break;
|
|
zret = inflateReset(&(c->zstream));
|
|
if (zret != Z_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
if (c->flags & FLAG_MULTITHREAD) {
|
|
mthread_inlen = *((unsigned int*)encoded);
|
|
mthread_outlen = *((unsigned int*)(encoded+4));
|
|
if (mthread_outlen > c->decomp_size)
|
|
mthread_outlen = c->decomp_size;
|
|
c->zstream.next_in = encoded + 8;
|
|
c->zstream.avail_in = mthread_inlen;
|
|
c->zstream.next_out = c->decomp_buf;
|
|
c->zstream.avail_out = c->decomp_size;
|
|
zret = inflate(&(c->zstream), Z_FINISH);
|
|
if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Mthread1 inflate error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%u != %lu)\n",
|
|
mthread_outlen, c->zstream.total_out);
|
|
return -1;
|
|
}
|
|
zret = inflateReset(&(c->zstream));
|
|
if (zret != Z_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate reset error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
c->zstream.next_in = encoded + 8 + mthread_inlen;
|
|
c->zstream.avail_in = len - mthread_inlen;
|
|
c->zstream.next_out = c->decomp_buf + mthread_outlen;
|
|
c->zstream.avail_out = c->decomp_size - mthread_outlen;
|
|
zret = inflate(&(c->zstream), Z_FINISH);
|
|
if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %lu)\n",
|
|
mthread_outlen, c->zstream.total_out);
|
|
return -1;
|
|
}
|
|
} else {
|
|
c->zstream.next_in = encoded;
|
|
c->zstream.avail_in = len;
|
|
c->zstream.next_out = c->decomp_buf;
|
|
c->zstream.avail_out = c->decomp_size;
|
|
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 -1;
|
|
}
|
|
if (c->decomp_size != (unsigned int)(c->zstream.total_out)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
|
|
c->decomp_size, c->zstream.total_out);
|
|
return -1;
|
|
}
|
|
}
|
|
encoded = c->decomp_buf;
|
|
len = c->decomp_size;;
|
|
#else
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
|
|
return -1;
|
|
#endif
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Apply PNG filter */
|
|
if ((avctx->codec_id == 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 = encoded[pixel_ptr++];
|
|
uqvq+=(encoded[pixel_ptr++] << 8);
|
|
for (col = 1; col < width; col++) {
|
|
encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
|
|
uqvq -= (encoded[pixel_ptr+1] | (encoded[pixel_ptr+2]<<8));
|
|
encoded[pixel_ptr+1] = (uqvq) & 0xff;
|
|
encoded[pixel_ptr+2] = ((uqvq)>>8) & 0xff;
|
|
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 -1;
|
|
}
|
|
}
|
|
|
|
/* Convert colorspace */
|
|
switch (c->imgtype) {
|
|
case IMGTYPE_YUV111:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * c->pic.linesize[0];
|
|
for (col = 0; col < width; col++) {
|
|
outptr[pixel_ptr++] = get_b(encoded[0], encoded[1]);
|
|
outptr[pixel_ptr++] = get_g(encoded[0], encoded[1], encoded[2]);
|
|
outptr[pixel_ptr++] = get_r(encoded[0], encoded[2]);
|
|
encoded += 3;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_YUV422:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * c->pic.linesize[0];
|
|
for (col = 0; col < width/4; col++) {
|
|
outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
|
|
outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[6]);
|
|
outptr[pixel_ptr++] = get_r(encoded[0], encoded[6]);
|
|
outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
|
|
outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[6]);
|
|
outptr[pixel_ptr++] = get_r(encoded[1], encoded[6]);
|
|
outptr[pixel_ptr++] = get_b(encoded[2], encoded[5]);
|
|
outptr[pixel_ptr++] = get_g(encoded[2], encoded[5], encoded[7]);
|
|
outptr[pixel_ptr++] = get_r(encoded[2], encoded[7]);
|
|
outptr[pixel_ptr++] = get_b(encoded[3], encoded[5]);
|
|
outptr[pixel_ptr++] = get_g(encoded[3], encoded[5], encoded[7]);
|
|
outptr[pixel_ptr++] = get_r(encoded[3], encoded[7]);
|
|
encoded += 8;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_RGB24:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * c->pic.linesize[0];
|
|
for (col = 0; col < width; col++) {
|
|
outptr[pixel_ptr++] = encoded[0];
|
|
outptr[pixel_ptr++] = encoded[1];
|
|
outptr[pixel_ptr++] = encoded[2];
|
|
encoded += 3;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_YUV411:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * c->pic.linesize[0];
|
|
for (col = 0; col < width/4; col++) {
|
|
outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
|
|
outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr++] = get_r(encoded[0], encoded[5]);
|
|
outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
|
|
outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr++] = get_r(encoded[1], encoded[5]);
|
|
outptr[pixel_ptr++] = get_b(encoded[2], encoded[4]);
|
|
outptr[pixel_ptr++] = get_g(encoded[2], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr++] = get_r(encoded[2], encoded[5]);
|
|
outptr[pixel_ptr++] = get_b(encoded[3], encoded[4]);
|
|
outptr[pixel_ptr++] = get_g(encoded[3], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr++] = get_r(encoded[3], encoded[5]);
|
|
encoded += 6;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_YUV211:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * c->pic.linesize[0];
|
|
for (col = 0; col < width/2; col++) {
|
|
outptr[pixel_ptr++] = get_b(encoded[0], encoded[2]);
|
|
outptr[pixel_ptr++] = get_g(encoded[0], encoded[2], encoded[3]);
|
|
outptr[pixel_ptr++] = get_r(encoded[0], encoded[3]);
|
|
outptr[pixel_ptr++] = get_b(encoded[1], encoded[2]);
|
|
outptr[pixel_ptr++] = get_g(encoded[1], encoded[2], encoded[3]);
|
|
outptr[pixel_ptr++] = get_r(encoded[1], encoded[3]);
|
|
encoded += 4;
|
|
}
|
|
}
|
|
break;
|
|
case IMGTYPE_YUV420:
|
|
for (row = height / 2 - 1; row >= 0; row--) {
|
|
pixel_ptr = 2 * row * c->pic.linesize[0];
|
|
for (col = 0; col < width/2; col++) {
|
|
outptr[pixel_ptr] = get_b(encoded[0], encoded[4]);
|
|
outptr[pixel_ptr+1] = get_g(encoded[0], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr+2] = get_r(encoded[0], encoded[5]);
|
|
outptr[pixel_ptr+3] = get_b(encoded[1], encoded[4]);
|
|
outptr[pixel_ptr+4] = get_g(encoded[1], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr+5] = get_r(encoded[1], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]] = get_b(encoded[2], encoded[4]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+2] = get_r(encoded[2], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+3] = get_b(encoded[3], encoded[4]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr-c->pic.linesize[0]+5] = get_r(encoded[3], encoded[5]);
|
|
pixel_ptr += 6;
|
|
encoded += 6;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
|
|
return -1;
|
|
}
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = c->pic;
|
|
|
|
/* always report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Encode a frame
|
|
*
|
|
*/
|
|
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
|
|
LclContext *c = avctx->priv_data;
|
|
AVFrame *pict = data;
|
|
AVFrame * const p = &c->pic;
|
|
int i;
|
|
int zret; // Zlib return code
|
|
|
|
#ifndef CONFIG_ZLIB
|
|
av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled in.\n");
|
|
return -1;
|
|
#else
|
|
|
|
init_put_bits(&c->pb, buf, buf_size);
|
|
|
|
*p = *pict;
|
|
p->pict_type= FF_I_TYPE;
|
|
p->key_frame= 1;
|
|
|
|
if(avctx->pix_fmt != PIX_FMT_BGR24){
|
|
av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
|
|
return -1;
|
|
}
|
|
|
|
zret = deflateReset(&(c->zstream));
|
|
if (zret != Z_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Deflate reset error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
c->zstream.next_out = c->comp_buf;
|
|
c->zstream.avail_out = c->max_comp_size;
|
|
|
|
for(i = avctx->height - 1; i >= 0; i--) {
|
|
c->zstream.next_in = p->data[0]+p->linesize[0]*i;
|
|
c->zstream.avail_in = avctx->width*3;
|
|
zret = deflate(&(c->zstream), Z_NO_FLUSH);
|
|
if (zret != Z_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
}
|
|
zret = deflate(&(c->zstream), Z_FINISH);
|
|
if (zret != Z_STREAM_END) {
|
|
av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret);
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < c->zstream.total_out; i++)
|
|
put_bits(&c->pb, 8, c->comp_buf[i]);
|
|
flush_put_bits(&c->pb);
|
|
|
|
return c->zstream.total_out;
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Init lcl decoder
|
|
*
|
|
*/
|
|
static int decode_init(AVCodecContext *avctx)
|
|
{
|
|
LclContext * const c = (LclContext *)avctx->priv_data;
|
|
unsigned int basesize = avctx->width * avctx->height;
|
|
unsigned int max_basesize = ((avctx->width + 3) & ~3) * ((avctx->height + 3) & ~3);
|
|
unsigned int max_decomp_size;
|
|
int zret; // Zlib return code
|
|
|
|
c->avctx = avctx;
|
|
avctx->has_b_frames = 0;
|
|
|
|
c->pic.data[0] = NULL;
|
|
|
|
#ifdef CONFIG_ZLIB
|
|
// 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;
|
|
}
|
|
|
|
/* Check codec type */
|
|
if (((avctx->codec_id == CODEC_ID_MSZH) && (*((char *)avctx->extradata + 7) != CODEC_MSZH)) ||
|
|
((avctx->codec_id == CODEC_ID_ZLIB) && (*((char *)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 = *((char *)avctx->extradata + 4)) {
|
|
case IMGTYPE_YUV111:
|
|
c->decomp_size = basesize * 3;
|
|
max_decomp_size = max_basesize * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 1:1:1.\n");
|
|
break;
|
|
case IMGTYPE_YUV422:
|
|
c->decomp_size = basesize * 2;
|
|
max_decomp_size = max_basesize * 2;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:2.\n");
|
|
break;
|
|
case IMGTYPE_RGB24:
|
|
c->decomp_size = basesize * 3;
|
|
max_decomp_size = max_basesize * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is RGB 24.\n");
|
|
break;
|
|
case IMGTYPE_YUV411:
|
|
c->decomp_size = basesize / 2 * 3;
|
|
max_decomp_size = max_basesize / 2 * 3;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:1:1.\n");
|
|
break;
|
|
case IMGTYPE_YUV211:
|
|
c->decomp_size = basesize * 2;
|
|
max_decomp_size = max_basesize * 2;
|
|
av_log(avctx, AV_LOG_INFO, "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;
|
|
av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:0.\n");
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
|
|
return 1;
|
|
}
|
|
|
|
/* Detect compression method */
|
|
c->compression = *((char *)avctx->extradata + 5);
|
|
switch (avctx->codec_id) {
|
|
case CODEC_ID_MSZH:
|
|
switch (c->compression) {
|
|
case COMP_MSZH:
|
|
av_log(avctx, AV_LOG_INFO, "Compression enabled.\n");
|
|
break;
|
|
case COMP_MSZH_NOCOMP:
|
|
c->decomp_size = 0;
|
|
av_log(avctx, AV_LOG_INFO, "No compression.\n");
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
|
|
return 1;
|
|
}
|
|
break;
|
|
case CODEC_ID_ZLIB:
|
|
#ifdef CONFIG_ZLIB
|
|
switch (c->compression) {
|
|
case COMP_ZLIB_HISPEED:
|
|
av_log(avctx, AV_LOG_INFO, "High speed compression.\n");
|
|
break;
|
|
case COMP_ZLIB_HICOMP:
|
|
av_log(avctx, AV_LOG_INFO, "High compression.\n");
|
|
break;
|
|
case COMP_ZLIB_NORMAL:
|
|
av_log(avctx, AV_LOG_INFO, "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 1;
|
|
}
|
|
av_log(avctx, AV_LOG_INFO, "Compression level for ZLIB: (%d).\n", c->compression);
|
|
}
|
|
#else
|
|
av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
|
|
return 1;
|
|
#endif
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
|
|
return 1;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
/* Detect flags */
|
|
c->flags = *((char *)avctx->extradata + 6);
|
|
if (c->flags & FLAG_MULTITHREAD)
|
|
av_log(avctx, AV_LOG_INFO, "Multithread encoder flag set.\n");
|
|
if (c->flags & FLAG_NULLFRAME)
|
|
av_log(avctx, AV_LOG_INFO, "Nullframe insertion flag set.\n");
|
|
if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER))
|
|
av_log(avctx, AV_LOG_INFO, "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 (avctx->codec_id == CODEC_ID_ZLIB) {
|
|
#ifdef CONFIG_ZLIB
|
|
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);
|
|
return 1;
|
|
}
|
|
#else
|
|
av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
avctx->pix_fmt = PIX_FMT_BGR24;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Init lcl encoder
|
|
*
|
|
*/
|
|
static int encode_init(AVCodecContext *avctx)
|
|
{
|
|
LclContext *c = avctx->priv_data;
|
|
int zret; // Zlib return code
|
|
|
|
#ifndef CONFIG_ZLIB
|
|
av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
|
|
return 1;
|
|
#else
|
|
|
|
c->avctx= avctx;
|
|
|
|
assert(avctx->width && avctx->height);
|
|
|
|
avctx->extradata= av_mallocz(8);
|
|
avctx->coded_frame= &c->pic;
|
|
|
|
// Will be user settable someday
|
|
c->compression = 6;
|
|
c->flags = 0;
|
|
|
|
switch(avctx->pix_fmt){
|
|
case PIX_FMT_BGR24:
|
|
c->imgtype = IMGTYPE_RGB24;
|
|
c->decomp_size = avctx->width * avctx->height * 3;
|
|
avctx->bits_per_sample= 24;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Format %d not supported\n", avctx->pix_fmt);
|
|
return -1;
|
|
}
|
|
|
|
((uint8_t*)avctx->extradata)[0]= 4;
|
|
((uint8_t*)avctx->extradata)[1]= 0;
|
|
((uint8_t*)avctx->extradata)[2]= 0;
|
|
((uint8_t*)avctx->extradata)[3]= 0;
|
|
((uint8_t*)avctx->extradata)[4]= c->imgtype;
|
|
((uint8_t*)avctx->extradata)[5]= c->compression;
|
|
((uint8_t*)avctx->extradata)[6]= c->flags;
|
|
((uint8_t*)avctx->extradata)[7]= CODEC_ZLIB;
|
|
c->avctx->extradata_size= 8;
|
|
|
|
c->zstream.zalloc = Z_NULL;
|
|
c->zstream.zfree = Z_NULL;
|
|
c->zstream.opaque = Z_NULL;
|
|
zret = deflateInit(&(c->zstream), c->compression);
|
|
if (zret != Z_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Deflate init error: %d\n", zret);
|
|
return 1;
|
|
}
|
|
|
|
/* Conservative upper bound taken from zlib v1.2.1 source */
|
|
c->max_comp_size = c->decomp_size + ((c->decomp_size + 7) >> 3) +
|
|
((c->decomp_size + 63) >> 6) + 11;
|
|
if ((c->comp_buf = av_malloc(c->max_comp_size)) == NULL) {
|
|
av_log(avctx, AV_LOG_ERROR, "Can't allocate compression buffer.\n");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Uninit lcl decoder
|
|
*
|
|
*/
|
|
static int decode_end(AVCodecContext *avctx)
|
|
{
|
|
LclContext * const c = (LclContext *)avctx->priv_data;
|
|
|
|
if (c->pic.data[0])
|
|
avctx->release_buffer(avctx, &c->pic);
|
|
#ifdef CONFIG_ZLIB
|
|
inflateEnd(&(c->zstream));
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* Uninit lcl encoder
|
|
*
|
|
*/
|
|
static int encode_end(AVCodecContext *avctx)
|
|
{
|
|
LclContext *c = avctx->priv_data;
|
|
|
|
av_freep(&avctx->extradata);
|
|
av_freep(&c->comp_buf);
|
|
#ifdef CONFIG_ZLIB
|
|
deflateEnd(&(c->zstream));
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec mszh_decoder = {
|
|
"mszh",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSZH,
|
|
sizeof(LclContext),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|
|
|
|
|
|
AVCodec zlib_decoder = {
|
|
"zlib",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ZLIB,
|
|
sizeof(LclContext),
|
|
decode_init,
|
|
NULL,
|
|
decode_end,
|
|
decode_frame,
|
|
CODEC_CAP_DR1,
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
|
|
AVCodec zlib_encoder = {
|
|
"zlib",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_ZLIB,
|
|
sizeof(LclContext),
|
|
encode_init,
|
|
encode_frame,
|
|
encode_end,
|
|
};
|
|
|
|
#endif //CONFIG_ENCODERS
|