mirror of
https://github.com/mpv-player/mpv
synced 2024-12-13 18:36:09 +00:00
0c526eafa9
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11647 b3059339-0415-0410-9bf9-f77b7e298cf2
719 lines
23 KiB
C
719 lines
23 KiB
C
/*
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*
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* LCL (LossLess Codec Library) Decoder for Mplayer
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* (c) 2002, 2003 Roberto Togni
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*
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* Fourcc: MSZH, ZLIB
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*
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* Win32 dll:
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* Ver2.23 By Kenji Oshima 2000.09.20
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* avimszh.dll, avizlib.dll
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*
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* A description of the decoding algorithm can be found here:
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* http://www.pcisys.net/~melanson/codecs
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "config.h"
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#ifdef HAVE_ZLIB
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#include <zlib.h>
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#endif
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#include "mp_msg.h"
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#include "vd_internal.h"
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static vd_info_t info = {
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"LCL Video decoder",
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"lcl",
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"Roberto Togni",
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"Roberto Togni",
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"native codec"
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};
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LIBVD_EXTERN(lcl)
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#define BMPTYPE_YUV 1
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#define BMPTYPE_RGB 2
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#define IMGTYPE_YUV111 0
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#define IMGTYPE_YUV422 1
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#define IMGTYPE_RGB24 2
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#define IMGTYPE_YUV411 3
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#define IMGTYPE_YUV211 4
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#define IMGTYPE_YUV420 5
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#define COMP_MSZH 0
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#define COMP_MSZH_NOCOMP 1
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#define COMP_ZLIB_HISPEED 1
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#define COMP_ZLIB_HICOMP 9
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#define COMP_ZLIB_NORMAL -1
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#define FLAG_MULTITHREAD 1
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#define FLAG_NULLFRAME 2
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#define FLAG_PNGFILTER 4
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#define FLAGMASK_UNUSED 0xf8
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#define CODEC_MSZH 1
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#define CODEC_ZLIB 3
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#define FOURCC_MSZH mmioFOURCC('M','S','Z','H')
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#define FOURCC_ZLIB mmioFOURCC('Z','L','I','B')
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/*
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* Decoder context
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*/
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typedef struct {
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// Image type
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int imgtype;
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// Compression type
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int compression;
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// Flags
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int flags;
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// Codec type
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int codec;
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// Decompressed data size
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unsigned int decomp_size;
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// Decompression buffer
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unsigned char* decomp_buf;
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#ifdef HAVE_ZLIB
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z_stream zstream;
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#endif
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} lcl_context_t;
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/*
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* Internal function prototypes
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*/
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// to set/get/query special features/parameters
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static int control(sh_video_t *sh,int cmd,void* arg,...)
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{
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return CONTROL_UNKNOWN;
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}
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/*
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*
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* Init LCL decoder
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*
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*/
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static int init(sh_video_t *sh)
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{
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int vo_ret; // Video output init ret value
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int zret; // Zlib return code
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lcl_context_t *hc; // Decoder context
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BITMAPINFOHEADER *bih = sh->bih;
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int basesize = bih->biWidth * bih->biHeight;
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if ((hc = malloc(sizeof(lcl_context_t))) == NULL) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for LCL decoder context.\n");
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return 0;
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}
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sh->context = (void *)hc;
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#ifdef HAVE_ZLIB
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// Needed if zlib unused or init aborted before inflateInit
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memset(&(hc->zstream), 0, sizeof(z_stream));
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#endif
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if ((bih->biCompression != FOURCC_MSZH) && (bih->biCompression != FOURCC_ZLIB)) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] Unknown BITMAPHEADER fourcc.\n");
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return 0;
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}
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if (bih->biSize < sizeof(BITMAPINFOHEADER) + 8) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BITMAPHEADER size too small.\n");
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return 0;
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}
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/* Detect codec type */
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switch (hc->codec = *((char *)bih + sizeof(BITMAPINFOHEADER) + 7)) {
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case CODEC_MSZH:
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Codec is MSZH.\n");
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break;
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case CODEC_ZLIB:
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Codec is ZLIB.\n");
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] Unknown codec id %d. Trusting fourcc.\n", hc->codec);
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switch (bih->biCompression) {
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case FOURCC_MSZH:
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hc->codec = CODEC_MSZH;
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break;
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case FOURCC_ZLIB:
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hc->codec = CODEC_ZLIB;
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] BUG! Unknown coded id and fourcc. Why am I here?.\n");
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return 0;
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}
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}
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/* Detect image type */
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switch (hc->imgtype = *((char *)bih + sizeof(BITMAPINFOHEADER) + 4)) {
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case IMGTYPE_YUV111:
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hc->decomp_size = basesize * 3;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 1:1:1.\n");
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break;
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case IMGTYPE_YUV422:
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hc->decomp_size = basesize * 2;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 4:2:2.\n");
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break;
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case IMGTYPE_RGB24:
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hc->decomp_size = basesize * 3;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is RGB 24.\n");
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break;
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case IMGTYPE_YUV411:
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hc->decomp_size = basesize / 2 * 3;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 4:1:1.\n");
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break;
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case IMGTYPE_YUV211:
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hc->decomp_size = basesize * 2;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 2:1:1.\n");
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break;
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case IMGTYPE_YUV420:
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hc->decomp_size = basesize / 2 * 3;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 4:2:0.\n");
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Unsupported image format %d.\n", hc->imgtype);
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return 0;
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}
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/* Detect compression method */
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hc->compression = *((char *)bih + sizeof(BITMAPINFOHEADER) + 5);
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switch (hc->codec) {
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case CODEC_MSZH:
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switch (hc->compression) {
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case COMP_MSZH:
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Compression enabled.\n");
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break;
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case COMP_MSZH_NOCOMP:
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hc->decomp_size = 0;
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] No compression.\n");
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Unsupported compression format for MSZH (%d).\n", hc->compression);
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return 0;
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}
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break;
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case CODEC_ZLIB:
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#ifdef HAVE_ZLIB
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switch (hc->compression) {
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case COMP_ZLIB_HISPEED:
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] High speed compression.\n");
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break;
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case COMP_ZLIB_HICOMP:
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] High compression.\n");
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break;
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case COMP_ZLIB_NORMAL:
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Normal compression.\n");
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break;
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default:
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if ((hc->compression < Z_NO_COMPRESSION) || (hc->compression > Z_BEST_COMPRESSION)) {
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Unusupported compression level for ZLIB: (%d).\n", hc->compression);
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return 0;
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}
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Compression level for ZLIB: (%d).\n", hc->compression);
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}
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#else
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Zlib support not compiled.\n");
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return 0;
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#endif
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown codec in compression switch.\n");
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return 0;
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}
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/* Allocate decompression buffer */
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/* 4*8 max oveflow space for mszh decomp algorithm */
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if (hc->decomp_size) {
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if ((hc->decomp_buf = malloc(hc->decomp_size+4*8)) == NULL) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Can't allocate decompression buffer.\n");
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return 0;
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}
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}
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/* Detect flags */
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hc->flags = *((char *)bih + sizeof(BITMAPINFOHEADER) + 6);
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if (hc->flags & FLAG_MULTITHREAD)
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Multithread encoder flag set.\n");
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if (hc->flags & FLAG_NULLFRAME)
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Nullframe insertion flag set.\n");
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if ((hc->codec == CODEC_ZLIB) && (hc->flags & FLAG_PNGFILTER))
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mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] PNG filter flag set.\n");
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if (hc->flags & FLAGMASK_UNUSED)
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] Unknown flag set (%d).\n", hc->flags);
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/* If needed init zlib */
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if (hc->codec == CODEC_ZLIB) {
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#ifdef HAVE_ZLIB
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hc->zstream.zalloc = Z_NULL;
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hc->zstream.zfree = Z_NULL;
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hc->zstream.opaque = Z_NULL;
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zret = inflateInit(&(hc->zstream));
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if (zret != Z_OK) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Inflate init error: %d\n", zret);
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return 0;
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}
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#else
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Zlib support not compiled.\n");
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return 0;
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#endif
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}
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/*
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* Initialize video output device
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*/
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vo_ret = mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24);
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return vo_ret;
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}
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/*
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*
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* Uninit LCL decoder
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*
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*/
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static void uninit(sh_video_t *sh)
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{
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lcl_context_t *hc = (lcl_context_t *) sh->context; // Decoder context
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if (sh->context) {
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#ifdef HAVE_ZLIB
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inflateEnd(&hc->zstream);
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#endif
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free(sh->context);
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}
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}
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inline unsigned char fix (int pix14)
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{
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int tmp;
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tmp = (pix14 + 0x80000) >> 20;
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if (tmp < 0)
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return 0;
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if (tmp > 255)
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return 255;
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return tmp;
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}
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inline unsigned char get_b (unsigned char yq, signed char bq)
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{
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return fix((yq << 20) + bq * 1858076);
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}
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inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
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{
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return fix((yq << 20) - bq * 360857 - rq * 748830);
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}
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inline unsigned char get_r (unsigned char yq, signed char rq)
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{
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return fix((yq << 20) + rq * 1470103);
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}
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int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr);
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/*
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*
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* Decode a frame
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*
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*/
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static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags)
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{
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mp_image_t* mpi;
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int pixel_ptr;
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int row, col;
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unsigned char *encoded = (unsigned char *)data;
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lcl_context_t *hc = (lcl_context_t *) sh->context; // Decoder context
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unsigned char *outptr;
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int width = sh->disp_w; // Real image width
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int height = sh->disp_h; // Real image height
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#ifdef HAVE_ZLIB
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int zret; // Zlib return code
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#endif
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unsigned int mszh_dlen;
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unsigned char yq, y1q, uq, vq;
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int uqvq;
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unsigned int mthread_inlen, mthread_outlen;
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// Skipped frame
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if(len <= 0)
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return NULL;
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/* Get output image buffer */
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mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, 0, sh->disp_w, sh->disp_h);
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if (!mpi) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate mpi image for lcl codec.\n");
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return NULL;
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}
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outptr = mpi->planes[0]; // Output image pointer
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/* Decompress frame */
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switch (hc->codec) {
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case CODEC_MSZH:
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switch (hc->compression) {
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case COMP_MSZH:
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if (hc->flags & FLAG_MULTITHREAD) {
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mthread_inlen = *((unsigned int*)encoded);
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mthread_outlen = *((unsigned int*)(encoded+4));
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mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, hc->decomp_buf);
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if (mthread_outlen != mszh_dlen) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] MSZH: mthread1 decoded size differs (%d != %d)\n",
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mthread_outlen, mszh_dlen);
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}
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mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - mthread_inlen,
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hc->decomp_buf + mthread_outlen);
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if ((hc->decomp_size - mthread_outlen) != mszh_dlen) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] MSZH: mthread2 decoded size differs (%d != %d)\n",
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hc->decomp_size - mthread_outlen, mszh_dlen);
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}
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encoded = hc->decomp_buf;
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len = hc->decomp_size;
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} else {
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mszh_dlen = mszh_decomp(encoded, len, hc->decomp_buf);
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if (hc->decomp_size != mszh_dlen) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] MSZH: decoded size differs (%d != %d)\n",
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hc->decomp_size, mszh_dlen);
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}
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encoded = hc->decomp_buf;
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len = mszh_dlen;
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}
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break;
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case COMP_MSZH_NOCOMP:
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown MSZH compression in frame decoder.\n");
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return 0;
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}
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break;
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case CODEC_ZLIB:
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#ifdef HAVE_ZLIB
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zret = inflateReset(&(hc->zstream));
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if (zret != Z_OK) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: inflate reset error: %d\n", zret);
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return 0;
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}
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if (hc->flags & FLAG_MULTITHREAD) {
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mthread_inlen = *((unsigned int*)encoded);
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mthread_outlen = *((unsigned int*)(encoded+4));
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hc->zstream.next_in = encoded + 8;
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hc->zstream.avail_in = mthread_inlen;
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hc->zstream.next_out = hc->decomp_buf;
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hc->zstream.avail_out = mthread_outlen;
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zret = inflate(&(hc->zstream), Z_FINISH);
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if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: mthread1 inflate error: %d\n", zret);
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return 0;
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}
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if (mthread_outlen != (unsigned int)(hc->zstream.total_out)) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] ZLIB: mthread1 decoded size differs (%u != %lu)\n",
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mthread_outlen, hc->zstream.total_out);
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}
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zret = inflateReset(&(hc->zstream));
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if (zret != Z_OK) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: mthread2 inflate reset error: %d\n", zret);
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return 0;
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}
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hc->zstream.next_in = encoded + 8 + mthread_inlen;
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hc->zstream.avail_in = len - mthread_inlen;
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hc->zstream.next_out = hc->decomp_buf + mthread_outlen;
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hc->zstream.avail_out = mthread_outlen;
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zret = inflate(&(hc->zstream), Z_FINISH);
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if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: mthread2 inflate error: %d\n", zret);
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return 0;
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}
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if ((hc->decomp_size - mthread_outlen) != (unsigned int)(hc->zstream.total_out)) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] ZLIB: mthread2 decoded size differs (%d != %lu)\n",
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hc->decomp_size - mthread_outlen, hc->zstream.total_out);
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}
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} else {
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hc->zstream.next_in = data;
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hc->zstream.avail_in = len;
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hc->zstream.next_out = hc->decomp_buf;
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hc->zstream.avail_out = hc->decomp_size;
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zret = inflate(&(hc->zstream), Z_FINISH);
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if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: inflate error: %d\n", zret);
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return 0;
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}
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if (hc->decomp_size != (unsigned int)(hc->zstream.total_out)) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] ZLIB: decoded size differs (%d != %lu)\n",
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hc->decomp_size, hc->zstream.total_out);
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}
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}
|
|
encoded = hc->decomp_buf;
|
|
len = hc->decomp_size;;
|
|
#else
|
|
mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Zlib support not compiled in frame decoder.\n");
|
|
return 0;
|
|
#endif
|
|
break;
|
|
default:
|
|
mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown codec in frame decoder compression switch.\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Apply PNG filter */
|
|
if ((hc->codec == CODEC_ZLIB) && (hc->flags & FLAG_PNGFILTER)) {
|
|
switch (hc->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;
|
|
break;
|
|
default:
|
|
mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown imagetype in pngfilter switch.\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Convert colorspace */
|
|
switch (hc->imgtype) {
|
|
case IMGTYPE_YUV111:
|
|
for (row = height - 1; row >= 0; row--) {
|
|
pixel_ptr = row * mpi->stride[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 * mpi->stride[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 * mpi->stride[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 * mpi->stride[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 * mpi->stride[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 * mpi->stride[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-mpi->stride[0]] = get_b(encoded[2], encoded[4]);
|
|
outptr[pixel_ptr-mpi->stride[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr-mpi->stride[0]+2] = get_r(encoded[2], encoded[5]);
|
|
outptr[pixel_ptr-mpi->stride[0]+3] = get_b(encoded[3], encoded[4]);
|
|
outptr[pixel_ptr-mpi->stride[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
|
|
outptr[pixel_ptr-mpi->stride[0]+5] = get_r(encoded[3], encoded[5]);
|
|
pixel_ptr += 6;
|
|
encoded += 6;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown imagetype in image decoder.\n");
|
|
return 0;
|
|
}
|
|
|
|
return mpi;
|
|
}
|
|
|
|
|
|
|
|
int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr)
|
|
{
|
|
unsigned char *destptr_bak = destptr;
|
|
unsigned char mask = 0;
|
|
unsigned char maskbit = 0;
|
|
unsigned int ofs, cnt;
|
|
|
|
while (srclen > 0) {
|
|
if (maskbit == 0) {
|
|
mask = *(srcptr++);
|
|
maskbit = 8;
|
|
srclen--;
|
|
continue;
|
|
}
|
|
if ((mask & (1 << (--maskbit))) == 0) {
|
|
*(destptr++) = *(srcptr++);
|
|
*(destptr++) = *(srcptr++);
|
|
*(destptr++) = *(srcptr++);
|
|
*(destptr++) = *(srcptr++);
|
|
srclen -= 4;
|
|
} else {
|
|
ofs = *(srcptr++);
|
|
cnt = *(srcptr++);
|
|
ofs += cnt * 256;;
|
|
cnt = ((cnt >> 3) & 0x1f) + 1;
|
|
ofs &= 0x7ff;
|
|
srclen -= 2;
|
|
cnt *= 4;
|
|
for (; cnt > 0; cnt--) {
|
|
*(destptr) = *(destptr - ofs);
|
|
destptr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
return (destptr - destptr_bak);
|
|
}
|
|
|