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Diffstat (limited to 'libmpcodecs/native/msvidc.c')
| -rw-r--r-- | libmpcodecs/native/msvidc.c | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/libmpcodecs/native/msvidc.c b/libmpcodecs/native/msvidc.c deleted file mode 100644 index b312f01b15..0000000000 --- a/libmpcodecs/native/msvidc.c +++ /dev/null @@ -1,394 +0,0 @@ -/* - Microsoft Video 1 Decoder - - (C) 2001 Mike Melanson - - The description of the algorithm you can read here: - http://www.pcisys.net/~melanson/codecs/ - - 32bpp support by Alex Beregszaszi -*/ - -#include "config.h" -#include "bswap.h" -#define quad quad_m - -#define LE_16(x) (le2me_16(*(unsigned short *)(x))) - -#define DECODE_BGR555_TO_BGR888(x) \ - x.c1_b = (x.c1 >> 7) & 0xF8; \ - x.c1_g = (x.c1 >> 2) & 0xF8; \ - x.c1_r = (x.c1 << 3) & 0xF8; \ - x.c2_b = (x.c2 >> 7) & 0xF8; \ - x.c2_g = (x.c2 >> 2) & 0xF8; \ - x.c2_r = (x.c2 << 3) & 0xF8; - -#define DECODE_PALETTE_TO_BGR888(x) \ - x.c1_b = palette_map[x.c1 * 4 + 2]; \ - x.c1_g = palette_map[x.c1 * 4 + 1]; \ - x.c1_r = palette_map[x.c1 * 4 + 0]; \ - x.c2_b = palette_map[x.c2 * 4 + 2]; \ - x.c2_g = palette_map[x.c2 * 4 + 1]; \ - x.c2_r = palette_map[x.c2 * 4 + 0]; - -struct -{ - unsigned short c1, c2; - unsigned char c1_r, c1_g, c1_b; - unsigned char c2_r, c2_g, c2_b; -} quad[2][2]; - -void AVI_Decode_Video1_16( - char *encoded, - int encoded_size, - char *decoded, - int width, - int height, - int bytes_per_pixel) -{ - int block_ptr, pixel_ptr; - int total_blocks; - int pixel_x, pixel_y; // pixel width and height iterators - int block_x, block_y; // block width and height iterators - int blocks_wide, blocks_high; // width and height in 4x4 blocks - int block_inc; - int row_dec; - - // decoding parameters - int stream_ptr; - unsigned char byte_a, byte_b; - unsigned short flags; - int skip_blocks; - - stream_ptr = 0; - skip_blocks = 0; - blocks_wide = width / 4; - blocks_high = height / 4; - total_blocks = blocks_wide * blocks_high; - block_inc = 4 * bytes_per_pixel; - row_dec = (width + 4) * bytes_per_pixel; - - for (block_y = blocks_high; block_y > 0; block_y--) - { - block_ptr = ((block_y * 4) - 1) * (width * bytes_per_pixel); - for (block_x = blocks_wide; block_x > 0; block_x--) - { - // check if this block should be skipped - if (skip_blocks) - { - block_ptr += block_inc; - skip_blocks--; - total_blocks--; - continue; - } - - pixel_ptr = block_ptr; - - // get the next two bytes in the encoded data stream - byte_a = encoded[stream_ptr++]; - byte_b = encoded[stream_ptr++]; - - // check if the decode is finished - if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) - return; - - // check if this is a skip code - else if ((byte_b & 0xFC) == 0x84) - { - // but don't count the current block - skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1; - } - - // check if this is in the 2- or 8-color classes - else if (byte_b < 0x80) - { - flags = (byte_b << 8) | byte_a; - - quad[0][0].c1 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - quad[0][0].c2 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - - DECODE_BGR555_TO_BGR888(quad[0][0]); - - if (quad[0][0].c1 & 0x8000) - { - // 8-color encoding - quad[1][0].c1 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - quad[1][0].c2 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - quad[0][1].c1 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - quad[0][1].c2 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - quad[1][1].c1 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - quad[1][1].c2 = LE_16(&encoded[stream_ptr]); - stream_ptr += 2; - - DECODE_BGR555_TO_BGR888(quad[0][1]); - DECODE_BGR555_TO_BGR888(quad[1][0]); - DECODE_BGR555_TO_BGR888(quad[1][1]); - - for (pixel_y = 0; pixel_y < 4; pixel_y++) - { - for (pixel_x = 0; pixel_x < 4; pixel_x++) - { - if (flags & 1) - { - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_r; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_g; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - else - { - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_r; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_g; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - - // get the next flag ready to go - flags >>= 1; - } - pixel_ptr -= row_dec; - } - } - else - { - // 2-color encoding - for (pixel_y = 0; pixel_y < 4; pixel_y++) - { - for (pixel_x = 0; pixel_x < 4; pixel_x++) - { - if (flags & 1) - { - decoded[pixel_ptr++] = quad[0][0].c1_r; - decoded[pixel_ptr++] = quad[0][0].c1_g; - decoded[pixel_ptr++] = quad[0][0].c1_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - else - { - decoded[pixel_ptr++] = quad[0][0].c2_r; - decoded[pixel_ptr++] = quad[0][0].c2_g; - decoded[pixel_ptr++] = quad[0][0].c2_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - - // get the next flag ready to go - flags >>= 1; - } - pixel_ptr -= row_dec; - } - } - } - - // otherwise, it's a 1-color block - else - { - quad[0][0].c1 = (byte_b << 8) | byte_a; - DECODE_BGR555_TO_BGR888(quad[0][0]); - - for (pixel_y = 0; pixel_y < 4; pixel_y++) - { - for (pixel_x = 0; pixel_x < 4; pixel_x++) - { - decoded[pixel_ptr++] = quad[0][0].c1_r; - decoded[pixel_ptr++] = quad[0][0].c1_g; - decoded[pixel_ptr++] = quad[0][0].c1_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - pixel_ptr -= row_dec; - } - } - - block_ptr += block_inc; - total_blocks--; - } - } -} - -void AVI_Decode_Video1_8( - char *encoded, - int encoded_size, - char *decoded, - int width, - int height, - unsigned char *palette_map, - int bytes_per_pixel) -{ - int block_ptr, pixel_ptr; - int total_blocks; - int pixel_x, pixel_y; // pixel width and height iterators - int block_x, block_y; // block width and height iterators - int blocks_wide, blocks_high; // width and height in 4x4 blocks - int block_inc; - int row_dec; - - // decoding parameters - int stream_ptr; - unsigned char byte_a, byte_b; - unsigned short flags; - int skip_blocks; - - stream_ptr = 0; - skip_blocks = 0; - blocks_wide = width / 4; - blocks_high = height / 4; - total_blocks = blocks_wide * blocks_high; - block_inc = 4 * bytes_per_pixel; - row_dec = (width + 4) * bytes_per_pixel; - - for (block_y = blocks_high; block_y > 0; block_y--) - { - block_ptr = ((block_y * 4) - 1) * (width * bytes_per_pixel); - for (block_x = blocks_wide; block_x > 0; block_x--) - { - // check if this block should be skipped - if (skip_blocks) - { - block_ptr += block_inc; - skip_blocks--; - total_blocks--; - continue; - } - - pixel_ptr = block_ptr; - - // get the next two bytes in the encoded data stream - byte_a = encoded[stream_ptr++]; - byte_b = encoded[stream_ptr++]; - - // check if the decode is finished - if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) - return; - - // check if this is a skip code - else if ((byte_b & 0xFC) == 0x84) - { - // but don't count the current block - skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1; - } - - // check if this is a 2-color block - else if (byte_b < 0x80) - { - flags = (byte_b << 8) | byte_a; - - quad[0][0].c1 = (unsigned char)encoded[stream_ptr++]; - quad[0][0].c2 = (unsigned char)encoded[stream_ptr++]; - - DECODE_PALETTE_TO_BGR888(quad[0][0]); - - // 2-color encoding - for (pixel_y = 0; pixel_y < 4; pixel_y++) - { - for (pixel_x = 0; pixel_x < 4; pixel_x++) - { - if (flags & 1) - { - decoded[pixel_ptr++] = quad[0][0].c1_r; - decoded[pixel_ptr++] = quad[0][0].c1_g; - decoded[pixel_ptr++] = quad[0][0].c1_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - else - { - decoded[pixel_ptr++] = quad[0][0].c2_r; - decoded[pixel_ptr++] = quad[0][0].c2_g; - decoded[pixel_ptr++] = quad[0][0].c2_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - - // get the next flag ready to go - flags >>= 1; - } - pixel_ptr -= row_dec; - } - } - - // check if it's an 8-color block - else if (byte_b >= 0x90) - { - flags = (byte_b << 8) | byte_a; - - quad[0][0].c1 = (unsigned char)encoded[stream_ptr++]; - quad[0][0].c2 = (unsigned char)encoded[stream_ptr++]; - quad[1][0].c1 = (unsigned char)encoded[stream_ptr++]; - quad[1][0].c2 = (unsigned char)encoded[stream_ptr++]; - - quad[0][1].c1 = (unsigned char)encoded[stream_ptr++]; - quad[0][1].c2 = (unsigned char)encoded[stream_ptr++]; - quad[1][1].c1 = (unsigned char)encoded[stream_ptr++]; - quad[1][1].c2 = (unsigned char)encoded[stream_ptr++]; - - DECODE_PALETTE_TO_BGR888(quad[0][0]); - DECODE_PALETTE_TO_BGR888(quad[0][1]); - DECODE_PALETTE_TO_BGR888(quad[1][0]); - DECODE_PALETTE_TO_BGR888(quad[1][1]); - - for (pixel_y = 0; pixel_y < 4; pixel_y++) - { - for (pixel_x = 0; pixel_x < 4; pixel_x++) - { - if (flags & 1) - { - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_r; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_g; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - else - { - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_r; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_g; - decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - - // get the next flag ready to go - flags >>= 1; - } - pixel_ptr -= row_dec; - } - } - - // otherwise, it's a 1-color block - else - { - // init c2 along with c1 just so c2 is a known value for macro - quad[0][0].c1 = quad[0][0].c2 = byte_a; - DECODE_PALETTE_TO_BGR888(quad[0][0]); - - for (pixel_y = 0; pixel_y < 4; pixel_y++) - { - for (pixel_x = 0; pixel_x < 4; pixel_x++) - { - decoded[pixel_ptr++] = quad[0][0].c1_r; - decoded[pixel_ptr++] = quad[0][0].c1_g; - decoded[pixel_ptr++] = quad[0][0].c1_b; - if (bytes_per_pixel == 4) /* 32bpp */ - pixel_ptr++; - } - pixel_ptr -= row_dec; - } - } - - block_ptr += block_inc; - total_blocks--; - } - } -} - |