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author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-09-10 20:59:52 +0000 |
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committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-09-10 20:59:52 +0000 |
commit | 5b3e3be1759a3139dc3e7c56527aea325a7728ef (patch) | |
tree | 08d727521d0fac3e31073ba67dd4256e39347f7a /libmpcodecs/vd_mtga.c | |
parent | 870d1cb130559c47f308bf081578d370d0b20b1e (diff) | |
download | mpv-5b3e3be1759a3139dc3e7c56527aea325a7728ef.tar.bz2 mpv-5b3e3be1759a3139dc3e7c56527aea325a7728ef.tar.xz |
TGA images (-mf on:type=tga) support
patch by Tilman Sauerbeck <tsauerbeck@users.sourceforge.net>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7363 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs/vd_mtga.c')
-rw-r--r-- | libmpcodecs/vd_mtga.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/libmpcodecs/vd_mtga.c b/libmpcodecs/vd_mtga.c new file mode 100644 index 0000000000..6455c97173 --- /dev/null +++ b/libmpcodecs/vd_mtga.c @@ -0,0 +1,274 @@ +/* author: Tilman Sauerbeck <tsauerbeck@users.sourceforge.net> + * based on: XreaL's x_r_img_tga.* (http://www.sourceforge.net/projects/xreal/) + * libtarga.* + * xli's tga.* + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "config.h" +#include "mp_msg.h" + +#include "bswap.h" +#include "postproc/rgb2rgb.h" +#include "libvo/fastmemcpy.h" + +#include "vd_internal.h" + +static vd_info_t info = +{ + "TGA Images decoder", + "mtga", + "Tilman Sauerbeck", + "Tilman Sauerbeck", + "only 24bpp and 32bpp RGB targa files support so far" +}; + +LIBVD_EXTERN(mtga) + +typedef enum +{ + TGA_NO_DATA, + TGA_UNCOMP_PALETTED, + TGA_UNCOMP_TRUECOLOR, + TGA_UNCOMP_GRAYSCALE, + TGA_RLE_PALETTED = 9, + TGA_RLE_TRUECOLOR, + TGA_RLE_GRAYSCALE +} TGAImageType; + +typedef struct +{ + unsigned char id_len; + unsigned short img_type; + + unsigned short width; + unsigned short height; + + unsigned char bpp; + unsigned char origin; /* 0 = lower left, 1 = upper left */ +} TGAInfo; + +typedef struct +{ + /* red, green, blue, alpha */ + unsigned char r; + unsigned char g; + unsigned char b; + unsigned char a; +} ColorChannels; + + +static unsigned int out_fmt = 0; + +static int last_w = -1; +static int last_h = -1; +static int last_c = -1; + +/* to set/get/query special features/parameters */ +static int control(sh_video_t *sh, int cmd, void *arg, ...) +{ + return CONTROL_UNKNOWN; +} + +/* init driver */ +static int init(sh_video_t *sh) +{ + last_w = -1; + return 1; +} + + +/* uninit driver */ +static void uninit(sh_video_t *sh) +{ +} + + +/* decode a runlength-encoded tga */ +static void decode_rle_tga(TGAInfo info, unsigned char *data, mp_image_t **mpi) +{ + ColorChannels chans = {0, 0, 0, 0}; + unsigned char repetitions, packet_header, *final; + unsigned short row, col, i; + short modifier; + + + /* if img.origin is 0, we decode from bottom to top. if it's 1, we decode from top to bottom */ + row = (info.origin) ? 0 : info.height - 1; + modifier = (info.origin) ? 1 : -1; + + for (;;) + { + final = (*mpi)->planes[0] + (*mpi)->stride[0] * row; + + for (col = 0; col < info.width;) + { + packet_header = *data++; + repetitions = 1 + (packet_header & 0x7f); + + if (packet_header & 0x80) + { + chans.b = *data++; + chans.g = *data++; + chans.r = *data++; + chans.a = (info.bpp == 32) ? *data++ : 255; + + for (i = 0; i < repetitions; i++) + { + *final++ = chans.r; + *final++ = chans.g; + *final++ = chans.b; + *final++ = chans.a; + + col++; + } + } + else /* raw packet */ + { + for (i = 0; i < repetitions; i++) + { + chans.b = *data++; + chans.g = *data++; + chans.r = *data++; + + *final++ = chans.r; + *final++ = chans.g; + *final++ = chans.b; + *final++ = chans.a = (info.bpp == 32) ? *data++ : 255; + + col++; + } + } + } + + row = row + modifier; + + if ((!info.origin && !row) || (info.origin && row >= info.height)) + break; + } + + + return; +} + + +static void decode_uncompressed_tga(TGAInfo info, unsigned char *data, mp_image_t **mpi) +{ + ColorChannels chans; + unsigned short row, col; + unsigned char *final; + short modifier; + + + /* if img.origin is 0, we decode from bottom to top. if it's 1, we decode from top to bottom */ + row = (info.origin) ? 0 : info.height - 1; + modifier = (info.origin) ? 1 : -1; + + for (;;) + { + final = (*mpi)->planes[0] + (*mpi)->stride[0] * row; + + for (col = 0; col < info.width; col++) + { + chans.b = *data++; + chans.g = *data++; + chans.r = *data++; + + *final++ = chans.r; + *final++ = chans.g; + *final++ = chans.b; + *final++ = info.bpp == 32 ? *data++ : 255; + + } + + row = row + modifier; + + if ((!info.origin && !row) || (info.origin && row >= info.height)) + break; + } + + + return; +} + + +static short read_tga_header(unsigned char *buf, TGAInfo *info) +{ + (*info).id_len = buf[0]; + + (*info).img_type = buf[2]; + + /* targa data is always stored in little endian byte order */ + (*info).width = le2me_16(*(unsigned short *) &buf[12]); + (*info).height = le2me_16(*(unsigned short *) &buf[14]); + + (*info).bpp = buf[16]; + + (*info).origin = (buf[17] & 0x20) >> 5; + + /* FIXME check for valid targa data */ + + return 0; +} + + +/* decode a frame */ +static mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags) +{ + TGAInfo info; + unsigned char *data = raw; + mp_image_t *mpi; + + + if (len <= 0) + return NULL; /* skip frame */ + + read_tga_header(data, &info); /* read information about the file */ + + if (info.bpp == 24) + out_fmt = IMGFMT_RGB24; + else if (info.bpp == 32) + out_fmt = IMGFMT_RGB32; + else + { + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported TGA type!\n"); + return NULL; + } + + if (info.img_type != TGA_UNCOMP_TRUECOLOR && info.img_type != TGA_RLE_TRUECOLOR) /* not a true color image */ + { + mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported TGA type: %i!\n", info.img_type); + return NULL; + } + + /* set data to the beginning of the image data */ + data = data + 18 + info.id_len; + + /* (re)init libvo if image parameters changed (width/height/colorspace) */ + if (last_w != info.width || last_h != info.height || last_c != out_fmt) + { + last_w = info.width; + last_h = info.height; + last_c = out_fmt; + + if (!out_fmt || !mpcodecs_config_vo(sh, info.width, info.height, out_fmt)) + return NULL; + } + + if (!(mpi = mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, info.width, info.height))) + return NULL; + + /* finally decode the image */ + if (info.img_type == TGA_UNCOMP_TRUECOLOR) + decode_uncompressed_tga(info, data, &mpi); + else if (info.img_type == TGA_RLE_TRUECOLOR) + decode_rle_tga(info, data, &mpi); + else + mpi = NULL; + + + return mpi; +} + |