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author | alex <alex@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-09-01 15:10:01 +0000 |
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committer | alex <alex@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-09-01 15:10:01 +0000 |
commit | c4560b672e5f0db67a110b5a6fe843310e2a4b21 (patch) | |
tree | d4cefa5f69b5dc234006d491959b778bcd19cded /libmpcodecs/vd_lcl.c | |
parent | 688e04de22a7b78fab164b8cc0d08f914a735937 (diff) | |
download | mpv-c4560b672e5f0db67a110b5a6fe843310e2a4b21.tar.bz2 mpv-c4560b672e5f0db67a110b5a6fe843310e2a4b21.tar.xz |
added LCL decoder by Roberto Togni <r_togni@libero.it>, removed my old vd_zlib
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7223 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs/vd_lcl.c')
-rw-r--r-- | libmpcodecs/vd_lcl.c | 738 |
1 files changed, 738 insertions, 0 deletions
diff --git a/libmpcodecs/vd_lcl.c b/libmpcodecs/vd_lcl.c new file mode 100644 index 0000000000..5e0ea824d0 --- /dev/null +++ b/libmpcodecs/vd_lcl.c @@ -0,0 +1,738 @@ +/* + * + * LCL (LossLess Codec Library) Decoder for Mplayer + * (c) 2002 Roberto Togni + * + * Fourcc: MSZH, ZLIB + * + * 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 + * + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "config.h" + +#ifdef HAVE_ZLIB +#include <zlib.h> +#endif + +#include "mp_msg.h" + +#include "vd_internal.h" + + +static vd_info_t info = { + "LCL Video decoder", + "lcl", + "Roberto Togni", + "Roberto Togni", + "native codec" +}; + +LIBVD_EXTERN(lcl) + + +#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 { + // Image type + int imgtype; + // Compression type + int compression; + // Flags + int flags; + // Codec type + int codec; + // Decompressed data size + unsigned int decomp_size; + // Decompression buffer + unsigned char* decomp_buf; +#ifdef HAVE_ZLIB + z_stream zstream; +#endif +} lcl_context_t; + + +/* + * Internal function prototypes + */ + + +// to set/get/query special features/parameters +static int control(sh_video_t *sh,int cmd,void* arg,...) +{ + switch(cmd) { + case VDCTRL_QUERY_FORMAT: + if (*((int*)arg) == IMGFMT_BGR24) + return CONTROL_TRUE; + else + return CONTROL_FALSE; + } + return CONTROL_UNKNOWN; +} + + +/* + * + * Init LCL decoder + * + */ +static int init(sh_video_t *sh) +{ + int vo_ret; // Video output init ret value + int zret; // Zlib return code + lcl_context_t *hc; // Decoder context + BITMAPINFOHEADER *bih = sh->bih; + int basesize = bih->biWidth * bih->biHeight; + + if ((hc = malloc(sizeof(lcl_context_t))) == NULL) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for LCL decoder context.\n"); + return 0; + } + + sh->context = (void *)hc; + +#ifdef HAVE_ZLIB + // Needed if zlib unused or init aborted before inflateInit + memset(&(hc->zstream), 0, sizeof(z_stream)); +#endif + + if ((bih->biCompression != FOURCC_MSZH) && (bih->biCompression != FOURCC_ZLIB)) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] Unknown BITMAPHEADER fourcc.\n"); + return 0; + } + + if (bih->biSize < sizeof(BITMAPINFOHEADER) + 8) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BITMAPHEADER size too small.\n"); + return 0; + } + + /* Detect codec type */ + switch (hc->codec = *((char *)bih + sizeof(BITMAPINFOHEADER) + 7)) { + case CODEC_MSZH: + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Codec is MSZH.\n"); + break; + case CODEC_ZLIB: + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Codec is ZLIB.\n"); + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] Unknown codec id %d. Trusting fourcc.\n", hc->codec); + switch (bih->biCompression) { + case FOURCC_MSZH: + hc->codec = CODEC_MSZH; + break; + case FOURCC_ZLIB: + hc->codec = CODEC_ZLIB; + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] BUG! Unknown coded id and fourcc. Why am I here?.\n"); + return 0; + } + } + + + /* Detect image type */ + switch (hc->imgtype = *((char *)bih + sizeof(BITMAPINFOHEADER) + 4)) { + case IMGTYPE_YUV111: + hc->decomp_size = basesize * 3; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 1:1:1.\n"); + break; + case IMGTYPE_YUV422: + hc->decomp_size = basesize * 2; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 4:2:2.\n"); + break; + case IMGTYPE_RGB24: + hc->decomp_size = basesize * 3; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is RGB 24.\n"); + break; + case IMGTYPE_YUV411: + hc->decomp_size = basesize / 2 * 3; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 4:1:1.\n"); + break; + case IMGTYPE_YUV211: + hc->decomp_size = basesize * 2; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 2:1:1.\n"); + break; + case IMGTYPE_YUV420: + hc->decomp_size = basesize / 2 * 3; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Image type is YUV 4:2:0.\n"); + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Unsupported image format %d.\n", hc->imgtype); + return 0; + } + + /* Detect compression method */ + hc->compression = *((char *)bih + sizeof(BITMAPINFOHEADER) + 5); + switch (hc->codec) { + case CODEC_MSZH: + switch (hc->compression) { + case COMP_MSZH: + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Compression enabled.\n"); + break; + case COMP_MSZH_NOCOMP: + hc->decomp_size = 0; + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] No compression.\n"); + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Unsupported compression format for MSZH (%d).\n", hc->compression); + return 0; + } + break; + case CODEC_ZLIB: + switch (hc->compression) { + case COMP_ZLIB_HISPEED: + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] High speed compression.\n"); + break; + case COMP_ZLIB_HICOMP: + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] High compression.\n"); + break; + case COMP_ZLIB_NORMAL: + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Normal compression.\n"); + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Unsupported compression format for ZLIB (%d).\n", hc->compression); + return 0; + } + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown codec in compression switch.\n"); + return 0; + } + + /* Allocate decompression buffer */ + /* 4*8 max oveflow space for mszh decomp algorithm */ + if (hc->decomp_size) { + if ((hc->decomp_buf = malloc(hc->decomp_size+4*8)) == NULL) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Can't allocate decompression buffer.\n"); + return 0; + } + } + + /* Detect flags */ + hc->flags = *((char *)bih + sizeof(BITMAPINFOHEADER) + 6); + if (hc->flags & FLAG_MULTITHREAD) + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Multithread encoder flag set.\n"); + if (hc->flags & FLAG_NULLFRAME) + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] Nullframe insertion flag set.\n"); + if ((hc->codec == CODEC_ZLIB) && (hc->flags & FLAG_PNGFILTER)) + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[LCL] PNG filter flag set.\n"); + if (hc->flags & FLAGMASK_UNUSED) + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] Unknown flag set (%d).\n", hc->flags); + + /* If needed init zlib */ + if (hc->codec == CODEC_ZLIB) { +#ifdef HAVE_ZLIB + hc->zstream.zalloc = Z_NULL; + hc->zstream.zfree = Z_NULL; + hc->zstream.opaque = Z_NULL; + zret = inflateInit(&(hc->zstream)); + if (zret != Z_OK) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Inflate init error: %d\n", zret); + return 0; + } +#else + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] Zlib support not compiled.\n"); + return 0; +#endif + } + + /* + * Initialize video output device + */ + vo_ret = mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24); + + return vo_ret; +} + + + + +/* + * + * Uninit LCL decoder + * + */ +static void uninit(sh_video_t *sh) +{ + lcl_context_t *hc = (lcl_context_t *) sh->context; // Decoder context + + if (sh->context) { +#ifdef HAVE_ZLIB + inflateEnd(&hc->zstream); +#endif + free(sh->context); + } +} + + + +inline unsigned char fix (int pix14) +{ + int tmp; + + tmp = (pix14 + 0x80000) >> 20; + if (tmp < 0) + return 0; + if (tmp > 255) + return 255; + return tmp; +} + + + +inline unsigned char get_b (unsigned char yq, signed char bq) +{ + return fix((yq << 20) + bq * 1858076); +} + + + +inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq) +{ + return fix((yq << 20) - bq * 360857 - rq * 748830); +} + + + +inline unsigned char get_r (unsigned char yq, signed char rq) +{ + return fix((yq << 20) + rq * 1470103); +} + + +int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr); + +/* + * + * Decode a frame + * + */ +static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags) +{ + mp_image_t* mpi; + int pixel_ptr; + int row, col; + unsigned char *encoded = (unsigned char *)data; + lcl_context_t *hc = (lcl_context_t *) sh->context; // Decoder context + unsigned char *outptr; + int width = sh->disp_w; // Real image width + int height = sh->disp_h; // Real image height +#ifdef HAVE_ZLIB + int zret; // Zlib return code +#endif + unsigned int mszh_dlen; + unsigned char yq, y1q, uq, vq; + int uqvq; + unsigned int mthread_inlen, mthread_outlen; + + // Skipped frame + if(len <= 0) + return NULL; + + /* Get output image buffer */ + mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, 0, sh->disp_w, sh->disp_h); + if (!mpi) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate mpi image for lcl codec.\n"); + return NULL; + } + + outptr = mpi->planes[0]; // Output image pointer + + + /* Decompress frame */ + switch (hc->codec) { + case CODEC_MSZH: + switch (hc->compression) { + case COMP_MSZH: + if (hc->flags & FLAG_MULTITHREAD) { + mthread_inlen = *((unsigned int*)encoded); + mthread_outlen = *((unsigned int*)(encoded+4)); + mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, hc->decomp_buf); + if (mthread_outlen != mszh_dlen) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] MSZH: mthread1 decoded size differs (%d != %d)\n", + mthread_outlen, mszh_dlen); + } + mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - mthread_inlen, + hc->decomp_buf + mthread_outlen); + if ((hc->decomp_size - mthread_outlen) != mszh_dlen) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] MSZH: mthread2 decoded size differs (%d != %d)\n", + hc->decomp_size - mthread_outlen, mszh_dlen); + } + encoded = hc->decomp_buf; + len = hc->decomp_size; + } else { + mszh_dlen = mszh_decomp(encoded, len, hc->decomp_buf); + if (hc->decomp_size != mszh_dlen) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] MSZH: decoded size differs (%d != %d)\n", + hc->decomp_size, mszh_dlen); + } + encoded = hc->decomp_buf; + len = mszh_dlen; + } + break; + case COMP_MSZH_NOCOMP: + break; + default: + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] BUG! Unknown MSZH compression in frame decoder.\n"); + return 0; + } + break; + case CODEC_ZLIB: + switch (hc->compression) { + case COMP_ZLIB_HISPEED: + case COMP_ZLIB_HICOMP: + case COMP_ZLIB_NORMAL: +#ifdef HAVE_ZLIB + zret = inflateReset(&(hc->zstream)); + if (zret != Z_OK) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: inflate reset error: %d\n", zret); + return 0; + } + if (hc->flags & FLAG_MULTITHREAD) { + mthread_inlen = *((unsigned int*)encoded); + mthread_outlen = *((unsigned int*)(encoded+4)); + hc->zstream.next_in = encoded + 8; + hc->zstream.avail_in = mthread_inlen; + hc->zstream.next_out = hc->decomp_buf; + hc->zstream.avail_out = mthread_outlen; + zret = inflate(&(hc->zstream), Z_FINISH); + if ((zret != Z_OK) && (zret != Z_STREAM_END)) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: mthread1 inflate error: %d\n", zret); + return 0; + } + if (mthread_outlen != (unsigned int)(hc->zstream.total_out)) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] ZLIB: mthread1 decoded size differs (%d != %d)\n", + mthread_outlen, hc->zstream.total_out); + } + zret = inflateReset(&(hc->zstream)); + if (zret != Z_OK) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: mthread2 inflate reset error: %d\n", zret); + return 0; + } + hc->zstream.next_in = encoded + 8 + mthread_inlen; + hc->zstream.avail_in = len - mthread_inlen; + hc->zstream.next_out = hc->decomp_buf + mthread_outlen; + hc->zstream.avail_out = mthread_outlen; + zret = inflate(&(hc->zstream), Z_FINISH); + if ((zret != Z_OK) && (zret != Z_STREAM_END)) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: mthread2 inflate error: %d\n", zret); + return 0; + } + if ((hc->decomp_size - mthread_outlen) != (unsigned int)(hc->zstream.total_out)) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] ZLIB: mthread2 decoded size differs (%d != %d)\n", + hc->decomp_size - mthread_outlen, hc->zstream.total_out); + } + } else { + hc->zstream.next_in = data; + hc->zstream.avail_in = len; + hc->zstream.next_out = hc->decomp_buf; + hc->zstream.avail_out = hc->decomp_size; + zret = inflate(&(hc->zstream), Z_FINISH); + if ((zret != Z_OK) && (zret != Z_STREAM_END)) { + mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[LCL] ZLIB: inflate error: %d\n", zret); + return 0; + } + if (hc->decomp_size != (unsigned int)(hc->zstream.total_out)) { + mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[LCL] ZLIB: decoded size differs (%d != %d)\n", + hc->decomp_size, hc->zstream.total_out); + } + } + 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 ZLIB compression in frame decoder.\n"); + return 0; + } + 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: + for (row = 0; row < height; row++) { + pixel_ptr = row * width * 3; + yq = encoded[pixel_ptr++]; + uqvq = encoded[pixel_ptr++] + (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_RGB24: // No + for (row = 0; row < height; row++) { + pixel_ptr = row * width * 3; + yq = encoded[pixel_ptr++]; + uqvq = encoded[pixel_ptr++] + (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); +} + |