mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 9614 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Måns Rullgård
18 years ago
parent
00eb27f111
commit
bff825528e
1 changed files with 0 additions and 924 deletions
@ -1,924 +0,0 @@ |
||||
/*
|
||||
* 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.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 "avcodec.h" |
||||
#include "bitstream.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); |
||||
} |
||||
|
||||
|
||||
|
||||
#ifdef CONFIG_DECODERS |
||||
/*
|
||||
* |
||||
* Decode a frame |
||||
* |
||||
*/ |
||||
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) |
||||
{ |
||||
LclContext * const c = 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 = 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 -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; |
||||
} |
||||
#endif |
||||
|
||||
#ifdef CONFIG_ENCODERS |
||||
/*
|
||||
* |
||||
* 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 |
||||
} |
||||
#endif /* CONFIG_ENCODERS */ |
||||
|
||||
#ifdef CONFIG_DECODERS |
||||
/*
|
||||
* |
||||
* Init lcl decoder |
||||
* |
||||
*/ |
||||
static int decode_init(AVCodecContext *avctx) |
||||
{ |
||||
LclContext * const c = 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; |
||||
|
||||
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; |
||||
} |
||||
#endif /* CONFIG_DECODERS */ |
||||
|
||||
#ifdef CONFIG_ENCODERS |
||||
/*
|
||||
* |
||||
* 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 |
||||
} |
||||
#endif /* CONFIG_ENCODERS */ |
||||
|
||||
|
||||
|
||||
#ifdef CONFIG_DECODERS |
||||
/*
|
||||
* |
||||
* Uninit lcl decoder |
||||
* |
||||
*/ |
||||
static int decode_end(AVCodecContext *avctx) |
||||
{ |
||||
LclContext * const c = avctx->priv_data; |
||||
|
||||
if (c->pic.data[0]) |
||||
avctx->release_buffer(avctx, &c->pic); |
||||
#ifdef CONFIG_ZLIB |
||||
inflateEnd(&(c->zstream)); |
||||
#endif |
||||
|
||||
return 0; |
||||
} |
||||
#endif |
||||
|
||||
#ifdef CONFIG_ENCODERS |
||||
/*
|
||||
* |
||||
* 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; |
||||
} |
||||
#endif |
||||
|
||||
#ifdef CONFIG_MSZH_DECODER |
||||
AVCodec mszh_decoder = { |
||||
"mszh", |
||||
CODEC_TYPE_VIDEO, |
||||
CODEC_ID_MSZH, |
||||
sizeof(LclContext), |
||||
decode_init, |
||||
NULL, |
||||
decode_end, |
||||
decode_frame, |
||||
CODEC_CAP_DR1, |
||||
}; |
||||
#endif |
||||
|
||||
#ifdef CONFIG_ZLIB_DECODER |
||||
AVCodec zlib_decoder = { |
||||
"zlib", |
||||
CODEC_TYPE_VIDEO, |
||||
CODEC_ID_ZLIB, |
||||
sizeof(LclContext), |
||||
decode_init, |
||||
NULL, |
||||
decode_end, |
||||
decode_frame, |
||||
CODEC_CAP_DR1, |
||||
}; |
||||
#endif |
||||
|
||||
#ifdef CONFIG_ENCODERS |
||||
|
||||
AVCodec zlib_encoder = { |
||||
"zlib", |
||||
CODEC_TYPE_VIDEO, |
||||
CODEC_ID_ZLIB, |
||||
sizeof(LclContext), |
||||
encode_init, |
||||
encode_frame, |
||||
encode_end, |
||||
}; |
||||
|
||||
#endif //CONFIG_ENCODERS
|
||||
Loading…
Reference in new issue