diff options
Diffstat (limited to 'libmpcodecs/vd_msrle.c')
| -rw-r--r-- | libmpcodecs/vd_msrle.c | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/libmpcodecs/vd_msrle.c b/libmpcodecs/vd_msrle.c deleted file mode 100644 index d808679bc9..0000000000 --- a/libmpcodecs/vd_msrle.c +++ /dev/null @@ -1,435 +0,0 @@ -#include <stdio.h> -#include <stdlib.h> - -#include "config.h" -#include "mp_msg.h" - -#include "vd_internal.h" - -static vd_info_t info = { - "Microsoft RLE decoder", - "msrle", - "Mike Melanson", - "Mike Melanson", - "native codec" -}; - -LIBVD_EXTERN(msrle) - -// 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){ - unsigned char *palette_map = NULL; - unsigned char *orig_map = (unsigned char *)sh->bih+40; - int i; - unsigned short color; - unsigned char r, g, b; - int bits_per_pixel = sh->codec->outfmt[sh->outfmtidx] & 255; - - // convert the palette for the requested output format - switch (bits_per_pixel) - { - case 15: - case 16: - if ((palette_map = - (unsigned char *)malloc(sh->bih->biClrUsed * 2)) == NULL) - return 0; - - for (i = 0; i < sh->bih->biClrUsed; i++) - { - r = orig_map[i * 4 + 2]; - g = orig_map[i * 4 + 1]; - b = orig_map[i * 4 + 0]; - if (bits_per_pixel == 15) - color = ((r>>3)<<10) | ((g>>3)<<5) | ((b>>3)); - else - color = ((r>>3)<<11) | ((g>>2)<<5) | ((b>>3)); - palette_map[i * 2 + 1] = color >> 8; - palette_map[i * 2 + 0] = color & 0xFF; - } - break; - - case 24: - case 32: - if ((palette_map = - (unsigned char *)malloc(sh->bih->biClrUsed * 4)) == NULL) - return 0; - memcpy(palette_map, orig_map, sh->bih->biClrUsed * 4); - break; - } - - sh->context = palette_map; - - return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24); -} - -// uninit driver -static void uninit(sh_video_t *sh){ - unsigned char *palette_map = (unsigned char *)sh->context; - - free(palette_map); -} - -#define FETCH_NEXT_STREAM_BYTE() \ - if (stream_ptr >= encoded_size) \ - { \ - mp_msg(MSGT_DECVIDEO, MSGL_WARN, \ - "MS RLE: stream ptr just went out of bounds (1)\n"); \ - return; \ - } \ - stream_byte = encoded[stream_ptr++]; - -void decode_msrle4( - unsigned char *encoded, - int encoded_size, - unsigned char *decoded, - int width, - int height, - unsigned char *palette_map, - int bits_per_pixel) -{ - int bytes_per_pixel = (bits_per_pixel + 1) / 8; - unsigned char r1, g1, b1; // for 24/32 bpp - unsigned char r2, g2, b2; - unsigned char color_hi1, color_lo1; // for 15/16 bpp - unsigned char color_hi2, color_lo2; - int stream_ptr = 0; - unsigned char rle_code; - unsigned char extra_byte; - unsigned char stream_byte; - int frame_size = width * height * bytes_per_pixel; - int pixel_ptr = 0; - int row_dec = width * bytes_per_pixel; - int row_ptr = (height - 1) * row_dec; - int i; - - r1 = r2 = g1 = g2 = b1 = b2 = - color_hi1 = color_hi2 = color_lo1 = color_lo2 = 0; - while (row_ptr >= 0) - { - FETCH_NEXT_STREAM_BYTE(); - rle_code = stream_byte; - if (rle_code == 0) - { - // fetch the next byte to see how to handle escape code - FETCH_NEXT_STREAM_BYTE(); - if (stream_byte == 0) - { - // line is done, goto the next one - row_ptr -= row_dec; - pixel_ptr = 0; - } - else if (stream_byte == 1) - // decode is done - return; - else if (stream_byte == 2) - { - // reposition frame decode coordinates - FETCH_NEXT_STREAM_BYTE(); - pixel_ptr += stream_byte * bytes_per_pixel; - FETCH_NEXT_STREAM_BYTE(); - row_ptr -= stream_byte * row_dec; - } - else - { - // copy pixels from encoded stream - rle_code = ((stream_byte + 1) & (~1)) / 2; - extra_byte = rle_code & 0x01; - if ((row_ptr + pixel_ptr + stream_byte * bytes_per_pixel > frame_size) || - (row_ptr < 0)) - { - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: frame ptr just went out of bounds (1)\n"); - return; - } - - for (i = 0; i < rle_code; i++) - { - if (pixel_ptr >= row_dec) - break; - if (bytes_per_pixel == 2) - { - color_hi1 = palette_map[(encoded[stream_ptr + i] >> 4) * 2 + 0]; - color_lo1 = palette_map[(encoded[stream_ptr + i] >> 4) * 2 + 1]; - decoded[row_ptr + pixel_ptr + 0] = color_hi1; - decoded[row_ptr + pixel_ptr + 1] = color_lo1; - } - else - { - r1 = palette_map[(encoded[stream_ptr + i] >> 4) * 4 + 2]; - g1 = palette_map[(encoded[stream_ptr + i] >> 4) * 4 + 1]; - b1 = palette_map[(encoded[stream_ptr + i] >> 4) * 4 + 0]; - decoded[row_ptr + pixel_ptr + 0] = b1; - decoded[row_ptr + pixel_ptr + 1] = g1; - decoded[row_ptr + pixel_ptr + 2] = r1; - } - pixel_ptr += bytes_per_pixel; - - if (i + 1 == rle_code && (stream_byte & 1) != 0) - break; - if (pixel_ptr >= row_dec) - break; - if (bytes_per_pixel == 2) - { - color_hi1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 2 + 0]; - color_lo1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 2 + 1]; - decoded[row_ptr + pixel_ptr + 0] = color_hi1; - decoded[row_ptr + pixel_ptr + 1] = color_lo1; - } - else - { - r1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 4 + 2]; - g1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 4 + 1]; - b1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 4 + 0]; - decoded[row_ptr + pixel_ptr + 0] = b1; - decoded[row_ptr + pixel_ptr + 1] = g1; - decoded[row_ptr + pixel_ptr + 2] = r1; - } - pixel_ptr += bytes_per_pixel; - } - stream_ptr += rle_code; - - // if the RLE code is odd, skip a byte in the stream - if (extra_byte) - stream_ptr++; - } - } - else - { - // decode a run of data - FETCH_NEXT_STREAM_BYTE(); - if (bytes_per_pixel == 2) - { - color_hi1 = palette_map[(stream_byte >> 4) * 2 + 0]; - color_lo1 = palette_map[(stream_byte >> 4) * 2 + 1]; - color_hi2 = palette_map[(stream_byte & 0x0F) * 2 + 0]; - color_lo2 = palette_map[(stream_byte & 0x0F) * 2 + 1]; - } - else - { - r1 = palette_map[(stream_byte >> 4) * 4 + 2]; - g1 = palette_map[(stream_byte >> 4) * 4 + 1]; - b1 = palette_map[(stream_byte >> 4) * 4 + 0]; - r2 = palette_map[(stream_byte & 0x0F) * 4 + 2]; - g2 = palette_map[(stream_byte & 0x0F) * 4 + 1]; - b2 = palette_map[(stream_byte & 0x0F) * 4 + 0]; - } - for (i = 0; i < rle_code; i++) - { - if (pixel_ptr >= row_dec) - break; - - if ((i & 1) == 0) - { - if (bytes_per_pixel == 2) - { - decoded[row_ptr + pixel_ptr + 0] = color_hi1; - decoded[row_ptr + pixel_ptr + 1] = color_lo1; - } - else - { - decoded[row_ptr + pixel_ptr + 0] = b1; - decoded[row_ptr + pixel_ptr + 1] = g1; - decoded[row_ptr + pixel_ptr + 2] = r1; - } - } - else - { - if (bytes_per_pixel == 2) - { - decoded[row_ptr + pixel_ptr + 0] = color_hi2; - decoded[row_ptr + pixel_ptr + 1] = color_lo2; - } - else - { - decoded[row_ptr + pixel_ptr + 0] = b2; - decoded[row_ptr + pixel_ptr + 1] = g2; - decoded[row_ptr + pixel_ptr + 2] = r2; - } - } - pixel_ptr += bytes_per_pixel; - } - } - } - - // one last sanity check on the way out - if (stream_ptr < encoded_size) - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: ended frame decode with bytes left over (%d < %d)\n", - stream_ptr, encoded_size); -} - -void decode_msrle8( - unsigned char *encoded, - int encoded_size, - unsigned char *decoded, - int width, - int height, - unsigned char *palette_map, - int bits_per_pixel) -{ - int bytes_per_pixel = (bits_per_pixel + 1) / 8; - unsigned char r, g, b; // for 24/32 bpp - unsigned char color_hi, color_lo; // for 15/16 bpp - int stream_ptr = 0; - unsigned char rle_code; - unsigned char extra_byte; - unsigned char stream_byte; - int frame_size = width * height * bytes_per_pixel; - int pixel_ptr = 0; - int row_dec = width * bytes_per_pixel; - int row_ptr = (height - 1) * row_dec; - - r = g = b = color_hi = color_lo = 0; - while (row_ptr >= 0) - { - FETCH_NEXT_STREAM_BYTE(); - rle_code = stream_byte; - if (rle_code == 0) - { - // fetch the next byte to see how to handle escape code - FETCH_NEXT_STREAM_BYTE(); - if (stream_byte == 0) - { - // line is done, goto the next one - row_ptr -= row_dec; - pixel_ptr = 0; - } - else if (stream_byte == 1) - // decode is done - return; - else if (stream_byte == 2) - { - // reposition frame decode coordinates - FETCH_NEXT_STREAM_BYTE(); - pixel_ptr += stream_byte * bytes_per_pixel; - FETCH_NEXT_STREAM_BYTE(); - row_ptr -= stream_byte * row_dec; - } - else - { - // copy pixels from encoded stream - if ((row_ptr + pixel_ptr + stream_byte * bytes_per_pixel > frame_size) || - (row_ptr < 0)) - { - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: frame ptr just went out of bounds (1)\n"); - return; - } - - rle_code = stream_byte; - extra_byte = stream_byte & 0x01; - if (stream_ptr + rle_code + extra_byte > encoded_size) - { - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: stream ptr just went out of bounds (2)\n"); - return; - } - - while (rle_code--) - { - FETCH_NEXT_STREAM_BYTE(); - if (bytes_per_pixel == 2) - { - color_hi = palette_map[stream_byte * 2 + 0]; - color_lo = palette_map[stream_byte * 2 + 1]; - decoded[row_ptr + pixel_ptr + 0] = color_hi; - decoded[row_ptr + pixel_ptr + 1] = color_lo; - } - else - { - r = palette_map[stream_byte * 4 + 2]; - g = palette_map[stream_byte * 4 + 1]; - b = palette_map[stream_byte * 4 + 0]; - decoded[row_ptr + pixel_ptr + 0] = b; - decoded[row_ptr + pixel_ptr + 1] = g; - decoded[row_ptr + pixel_ptr + 2] = r; - } - pixel_ptr += bytes_per_pixel; - } - - // if the RLE code is odd, skip a byte in the stream - if (extra_byte) - stream_ptr++; - } - } - else - { - // decode a run of data - if ((row_ptr + pixel_ptr + stream_byte * bytes_per_pixel > frame_size) || - (row_ptr < 0)) - { - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: frame ptr just went out of bounds (2)\n"); - return; - } - - FETCH_NEXT_STREAM_BYTE(); - - if (bytes_per_pixel == 2) - { - color_hi = palette_map[stream_byte * 2 + 0]; - color_lo = palette_map[stream_byte * 2 + 1]; - } - else - { - r = palette_map[stream_byte * 4 + 2]; - g = palette_map[stream_byte * 4 + 1]; - b = palette_map[stream_byte * 4 + 0]; - } - while(rle_code--) - { - if (bytes_per_pixel == 2) - { - decoded[row_ptr + pixel_ptr + 0] = color_hi; - decoded[row_ptr + pixel_ptr + 1] = color_lo; - } - else - { - decoded[row_ptr + pixel_ptr + 0] = b; - decoded[row_ptr + pixel_ptr + 1] = g; - decoded[row_ptr + pixel_ptr + 2] = r; - } - pixel_ptr += bytes_per_pixel; - } - } - } - - // one last sanity check on the way out - if (stream_ptr < encoded_size) - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: ended frame decode with bytes left over (%d < %d)\n", - stream_ptr, encoded_size); -} - -// decode a frame -static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){ - mp_image_t* mpi; - if(len<=0) return NULL; // skipped frame - - mpi=mpcodecs_get_image(sh, MP_IMGTYPE_STATIC, MP_IMGFLAG_PRESERVE, - sh->disp_w, sh->disp_h); - if(!mpi) return NULL; - - if (sh->format == 1) - decode_msrle8( - data,len, mpi->planes[0], - sh->disp_w, sh->disp_h, - (unsigned char *)sh->context, - mpi->imgfmt & 255); - else if (sh->format == 2) - decode_msrle4( - data,len, mpi->planes[0], - sh->disp_w, sh->disp_h, - (unsigned char *)sh->context, - mpi->imgfmt & 255); - else - mp_msg(MSGT_DECVIDEO, MSGL_WARN, - "MS RLE: Don't know how to decode format %08X", sh->format); - - return mpi; -} |