mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
initial implementation of SMC codec; it almost works, too!
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4276 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
parent
6743a5984e
commit
ff84d71eec
20
dec_video.c
20
dec_video.c
@ -157,13 +157,15 @@ void decode_cyuv(
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int height,
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int bit_per_pixel);
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int qt_init_decode_smc(void);
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void qt_decode_smc(
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unsigned char *encoded,
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int encoded_size,
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unsigned char *decoded,
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int width,
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int height,
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int encoded_bpp,
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unsigned char *palette_map,
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int bytes_per_pixel);
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//**************************************************************************//
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@ -602,7 +604,6 @@ switch(sh_video->codec->driver){
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case VFM_MSVIDC:
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case VFM_FLI:
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case VFM_QTRLE:
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case VFM_QTSMC:
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{
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#ifdef USE_MP_IMAGE
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sh_video->image->type=MP_IMGTYPE_STATIC;
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@ -618,6 +619,19 @@ if ((sh_video->codec->driver == VFM_QTRLE) && (sh_video->bih->biBitCount != 24))
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" this Quicktime file to the MPlayer FTP, the team could look at it.\n",
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sh_video->bih->biBitCount);
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break;
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}
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case VFM_QTSMC:
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{
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if (qt_init_decode_smc() != 0)
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "SMC decoder could not allocate enough memory");
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#ifdef USE_MP_IMAGE
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sh_video->image->type=MP_IMGTYPE_STATIC;
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#else
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int bpp=((out_fmt&255)+7)/8; // RGB only
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sh_video->our_out_buffer =
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(char*)memalign(64, sh_video->disp_w*sh_video->disp_h*bpp); // FIXME!!!
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#endif
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break;
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}
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case VFM_NUV:
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@ -959,7 +973,7 @@ if(verbose>1){
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qt_decode_smc(
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start, in_size, sh_video->our_out_buffer,
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sh_video->disp_w, sh_video->disp_h,
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sh_video->bih->biBitCount,
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(unsigned char *)sh_video->bih+40,
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((out_fmt&255)+7)/8);
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blit_frame = 3;
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break;
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qtsmc.c
475
qtsmc.c
@ -1,21 +1,496 @@
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/*
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Apple Graphics (SMC) Decoder for MPlayer
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by Mike Melanson
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The 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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#include <stdlib.h>
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#include "config.h"
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#include "bswap.h"
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#include "mp_msg.h"
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#define BE_16(x) (be2me_16(*(unsigned short *)(x)))
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#define BE_32(x) (be2me_32(*(unsigned int *)(x)))
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#define COLORS_PER_TABLE 256
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#define BYTES_PER_COLOR 4
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#define CPAIR 2
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#define CQUAD 4
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#define COCTET 8
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static unsigned char *color_pairs;
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static unsigned char *color_quads;
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static unsigned char *color_octets;
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static int color_pair_index;
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static int color_quad_index;
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static int color_octet_index;
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static int smc_initialized;
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// returns 0 if successfully initialized (enough memory was available),
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// non-zero on failure
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int qt_init_decode_smc(void)
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{
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// be pessimistic to start
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smc_initialized = 0;
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// allocate memory for the 3 palette tables
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if ((color_pairs = (unsigned char *)malloc(
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COLORS_PER_TABLE * BYTES_PER_COLOR * 2)) == 0)
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return 1;
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if ((color_quads = (unsigned char *)malloc(
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COLORS_PER_TABLE * BYTES_PER_COLOR * 4)) == 0)
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return 1;
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if ((color_octets = (unsigned char *)malloc(
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COLORS_PER_TABLE * BYTES_PER_COLOR * 8)) == 0)
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return 1;
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color_pair_index = 0;
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color_quad_index = 0;
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color_octet_index = 0;
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// if execution got this far, initialization succeeded
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smc_initialized = 1;
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return 0;
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}
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#define GET_BLOCK_COUNT \
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(opcode & 0x10) ? (1 + encoded[stream_ptr++]) : 1 + (opcode & 0x0F);
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#define ADVANCE_BLOCK() \
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{ \
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pixel_ptr += block_x_inc; \
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if (pixel_ptr >= (width * bytes_per_pixel)) \
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{ \
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pixel_ptr = 0; \
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row_ptr += block_y_inc * 4; \
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} \
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total_blocks--; \
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if (total_blocks < 0) \
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{ \
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "block counter just went negative (this should not happen)\n"); \
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return; \
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} \
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}
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void qt_decode_smc(
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unsigned char *encoded,
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int encoded_size,
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unsigned char *decoded,
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int width,
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int height,
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unsigned char *palette_map,
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int bytes_per_pixel)
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{
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int i;
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int stream_ptr = 0;
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int chunk_size;
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unsigned char opcode;
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int n_blocks;
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unsigned int color_flags;
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unsigned int color_flags_a;
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unsigned int color_flags_b;
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unsigned int flag_mask;
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int row_ptr = 0;
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int pixel_ptr = 0;
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int pixel_x, pixel_y;
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int row_inc = bytes_per_pixel * (width - 4);
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int max_height = row_inc * height;
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int block_x_inc = bytes_per_pixel * 4;
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int block_y_inc = bytes_per_pixel * width;
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int block_ptr;
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int prev_block_ptr;
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int prev_block_ptr1, prev_block_ptr2;
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int prev_block_flag;
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int total_blocks;
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int color_table_index; // indexes to color pair, quad, or octet tables
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int color_index; // indexes into palette map
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static int counter;
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//printf ("opcode count = %d\n", counter);
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counter = 0;
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if (!smc_initialized)
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return;
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chunk_size = BE_32(&encoded[stream_ptr]) & 0x00FFFFFF;
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stream_ptr += 4;
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if (chunk_size != encoded_size)
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "MOV chunk size != encoded chunk size; using MOV chunk size\n");
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chunk_size = encoded_size;
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total_blocks = (width * height) / (4 * 4);
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// traverse through the blocks
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while (total_blocks)
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{
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// sanity checks
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// make sure stream ptr hasn't gone out of bounds
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if (stream_ptr > chunk_size)
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{
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mp_msg(MSGT_DECVIDEO, MSGL_ERR,
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"SMC decoder just went out of bounds (stream ptr = %d, chunk size = %d)\n",
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stream_ptr, chunk_size);
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return;
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}
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// make sure the row pointer hasn't gone wild
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if (row_ptr >= max_height)
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{
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mp_msg(MSGT_DECVIDEO, MSGL_ERR,
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"SMC decoder just went out of bounds (row ptr = %d, height = %d)\n",
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row_ptr, max_height);
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return;
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}
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opcode = encoded[stream_ptr++];
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//printf ("opcode %02X\n", opcode & 0xF0);
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counter++;
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switch (opcode & 0xF0)
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{
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// skip n blocks
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case 0x00:
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case 0x10:
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n_blocks = GET_BLOCK_COUNT;
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while (n_blocks--)
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ADVANCE_BLOCK();
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break;
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// repeat last block n times
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case 0x20:
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case 0x30:
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n_blocks = GET_BLOCK_COUNT;
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// sanity check
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if ((row_ptr == 0) && (pixel_ptr == 0))
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{
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mp_msg(MSGT_DECVIDEO, MSGL_WARN,
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"encountered repeat block opcode (%02X) but no blocks rendered yet\n",
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opcode & 0xF0);
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break;
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}
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// figure out where the previous block started
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if (row_ptr == 0)
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prev_block_ptr1 = (row_ptr - block_y_inc * 4) + width - 4;
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else
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prev_block_ptr1 = row_ptr + pixel_ptr - 4;
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while (n_blocks--)
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{
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block_ptr = row_ptr + pixel_ptr;
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prev_block_ptr = prev_block_ptr1;
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for (pixel_y = 0; pixel_y < 4; pixel_y++)
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{
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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{
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decoded[block_ptr++] = decoded[prev_block_ptr++];
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decoded[block_ptr++] = decoded[prev_block_ptr++];
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decoded[block_ptr++] = decoded[prev_block_ptr++];
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if (bytes_per_pixel == 4) /* 32bpp */
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block_ptr++;
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}
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block_ptr += row_inc;
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prev_block_ptr += row_inc;
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}
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ADVANCE_BLOCK();
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}
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break;
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// repeat previous pair of blocks n times
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case 0x40:
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case 0x50:
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n_blocks = GET_BLOCK_COUNT;
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n_blocks *= 2;
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// sanity check
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if ((row_ptr == 0) && (pixel_ptr < 2 * block_x_inc))
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{
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mp_msg(MSGT_DECVIDEO, MSGL_WARN,
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"encountered repeat block opcode (%02X) but not enough blocks rendered yet\n",
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opcode & 0xF0);
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break;
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}
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// figure out where the previous 2 blocks started
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if (row_ptr == 0)
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prev_block_ptr1 = (row_ptr - block_y_inc * 4) +
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((width - 4) * bytes_per_pixel);
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else
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prev_block_ptr1 = row_ptr + pixel_ptr - block_x_inc;
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if (row_ptr == 0)
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prev_block_ptr2 = (row_ptr - block_y_inc * 4) +
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((width - 8) * bytes_per_pixel);
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else if (row_ptr == block_x_inc)
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prev_block_ptr2 = (row_ptr - block_y_inc * 4) +
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((width - 4) * bytes_per_pixel);
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else
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prev_block_ptr2 = row_ptr + pixel_ptr - (block_x_inc * 2);
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prev_block_flag = 0;
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while (n_blocks--)
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{
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block_ptr = row_ptr + pixel_ptr;
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if (prev_block_flag)
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prev_block_ptr = prev_block_ptr2;
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else
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prev_block_ptr = prev_block_ptr1;
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prev_block_flag = !prev_block_flag;
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for (pixel_y = 0; pixel_y < 4; pixel_y++)
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{
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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{
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decoded[block_ptr++] = decoded[prev_block_ptr++];
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decoded[block_ptr++] = decoded[prev_block_ptr++];
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decoded[block_ptr++] = decoded[prev_block_ptr++];
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if (bytes_per_pixel == 4) /* 32bpp */
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block_ptr++;
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}
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block_ptr += row_inc;
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prev_block_ptr += row_inc;
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}
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ADVANCE_BLOCK();
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}
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break;
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// 1-color block encoding
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case 0x60:
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case 0x70:
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n_blocks = GET_BLOCK_COUNT;
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color_index = encoded[stream_ptr++] * 4;
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while (n_blocks--)
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{
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block_ptr = row_ptr + pixel_ptr;
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for (pixel_y = 0; pixel_y < 4; pixel_y++)
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{
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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{
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decoded[block_ptr++] = palette_map[color_index + 0];
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decoded[block_ptr++] = palette_map[color_index + 1];
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decoded[block_ptr++] = palette_map[color_index + 2];
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if (bytes_per_pixel == 4) /* 32bpp */
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block_ptr++;
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}
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block_ptr += row_inc;
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}
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ADVANCE_BLOCK();
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}
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break;
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// 2-color block encoding
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case 0x80:
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case 0x90:
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n_blocks = (opcode & 0x0F) + 1;
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// figure out which color pair to use to paint the 2-color block
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if ((opcode & 0xF0) == 0x80)
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{
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// fetch the next 2 colors from bytestream and store in next
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// available entry in the color pair table
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for (i = 0; i < CPAIR; i++)
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{
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color_index = encoded[stream_ptr++] * BYTES_PER_COLOR;
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color_table_index = CPAIR * BYTES_PER_COLOR * color_pair_index +
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(i * BYTES_PER_COLOR);
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color_pairs[color_table_index + 0] = palette_map[color_index + 0];
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color_pairs[color_table_index + 1] = palette_map[color_index + 1];
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color_pairs[color_table_index + 2] = palette_map[color_index + 2];
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}
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// this is the base index to use for this block
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color_table_index = CPAIR * BYTES_PER_COLOR * color_pair_index;
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color_pair_index++;
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if (color_pair_index == COLORS_PER_TABLE)
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color_pair_index = 0;
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}
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else
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color_table_index = CPAIR * BYTES_PER_COLOR * encoded[stream_ptr++];
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while (n_blocks--)
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{
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color_flags = BE_16(&encoded[stream_ptr]);
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stream_ptr += 2;
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flag_mask = 0x8000;
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block_ptr = row_ptr + pixel_ptr;
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for (pixel_y = 0; pixel_y < 4; pixel_y++)
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{
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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{
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if (color_flags & flag_mask)
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color_index = color_table_index + BYTES_PER_COLOR;
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else
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color_index = color_table_index;
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flag_mask >>= 1;
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decoded[block_ptr++] = color_pairs[color_index + 0];
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decoded[block_ptr++] = color_pairs[color_index + 1];
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decoded[block_ptr++] = color_pairs[color_index + 2];
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if (bytes_per_pixel == 4) /* 32bpp */
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block_ptr++;
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}
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block_ptr += row_inc;
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}
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ADVANCE_BLOCK();
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}
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break;
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// 4-color block encoding
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case 0xA0:
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case 0xB0:
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//for(i = 0; i < 16; i++)
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// printf (" %02X", encoded[stream_ptr - 1 + i]);
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//printf ("\n");
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n_blocks = (opcode & 0x0F) + 1;
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// figure out which color quad to use to paint the 4-color block
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if ((opcode & 0xF0) == 0xA0)
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{
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// fetch the next 4 colors from bytestream and store in next
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// available entry in the color pair table
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for (i = 0; i < CQUAD; i++)
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{
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color_index = encoded[stream_ptr++] * BYTES_PER_COLOR;
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color_table_index = CQUAD * BYTES_PER_COLOR * color_quad_index +
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(i * BYTES_PER_COLOR);
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color_quads[color_table_index + 0] = palette_map[color_index + 0];
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color_quads[color_table_index + 1] = palette_map[color_index + 1];
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color_quads[color_table_index + 2] = palette_map[color_index + 2];
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}
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// this is the base index to use for this block
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color_table_index = CQUAD * BYTES_PER_COLOR * color_quad_index;
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color_quad_index++;
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if (color_quad_index == COLORS_PER_TABLE)
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color_quad_index = 0;
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}
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else
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color_table_index = CQUAD * BYTES_PER_COLOR * encoded[stream_ptr++];
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while (n_blocks--)
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{
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color_flags = BE_32(&encoded[stream_ptr]);
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stream_ptr += 4;
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// flag mask actually acts as a bit shift count here
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flag_mask = 30;
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block_ptr = row_ptr + pixel_ptr;
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for (pixel_y = 0; pixel_y < 4; pixel_y++)
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{
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for (pixel_x = 0; pixel_x < 4; pixel_x++)
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{
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color_index = color_table_index + (BYTES_PER_COLOR *
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((color_flags >> flag_mask) & 0x03));
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flag_mask -= 2;
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decoded[block_ptr++] = color_quads[color_index + 0];
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decoded[block_ptr++] = color_quads[color_index + 1];
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decoded[block_ptr++] = color_quads[color_index + 2];
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if (bytes_per_pixel == 4) /* 32bpp */
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block_ptr++;
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}
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block_ptr += row_inc;
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}
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ADVANCE_BLOCK();
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}
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break;
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// 8-color block encoding
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case 0xC0:
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case 0xD0:
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n_blocks = (opcode & 0x0F) + 1;
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// figure out which color octet to use to paint the 8-color block
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if ((opcode & 0xF0) == 0xC0)
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{
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// fetch the next 8 colors from bytestream and store in next
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// available entry in the color pair table
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for (i = 0; i < COCTET; i++)
|
||||
{
|
||||
color_index = encoded[stream_ptr++] * BYTES_PER_COLOR;
|
||||
color_table_index = COCTET * BYTES_PER_COLOR * color_octet_index +
|
||||
(i * BYTES_PER_COLOR);
|
||||
color_octets[color_table_index + 0] = palette_map[color_index + 0];
|
||||
color_octets[color_table_index + 1] = palette_map[color_index + 1];
|
||||
color_octets[color_table_index + 2] = palette_map[color_index + 2];
|
||||
}
|
||||
// this is the base index to use for this block
|
||||
color_table_index = COCTET * BYTES_PER_COLOR * color_octet_index;
|
||||
color_octet_index++;
|
||||
if (color_octet_index == COLORS_PER_TABLE)
|
||||
color_octet_index = 0;
|
||||
}
|
||||
else
|
||||
color_table_index = COCTET * BYTES_PER_COLOR * encoded[stream_ptr++];
|
||||
|
||||
while (n_blocks--)
|
||||
{
|
||||
// build the color flags
|
||||
color_flags_a = color_flags_b = 0;
|
||||
color_flags_a |= (encoded[stream_ptr++] << 16);
|
||||
color_flags_b |= (encoded[stream_ptr++] << 16);
|
||||
color_flags_a |= (encoded[stream_ptr++] << 8);
|
||||
color_flags_b |= (encoded[stream_ptr++] << 8);
|
||||
color_flags_a |= (encoded[stream_ptr++] << 0);
|
||||
color_flags_b |= (encoded[stream_ptr++] << 0);
|
||||
|
||||
color_flags = color_flags_a;
|
||||
// flag mask actually acts as a bit shift count here
|
||||
flag_mask = 21;
|
||||
block_ptr = row_ptr + pixel_ptr;
|
||||
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
||||
{
|
||||
// reload flags at third row (iteration pixel_y == 2)
|
||||
if (pixel_y == 2)
|
||||
color_flags = color_flags_b;
|
||||
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
||||
{
|
||||
color_index = color_table_index + (BYTES_PER_COLOR *
|
||||
((color_flags >> flag_mask) & 0x07));
|
||||
flag_mask -= 3;
|
||||
|
||||
decoded[block_ptr++] = color_octets[color_index + 0];
|
||||
decoded[block_ptr++] = color_octets[color_index + 1];
|
||||
decoded[block_ptr++] = color_octets[color_index + 2];
|
||||
if (bytes_per_pixel == 4) /* 32bpp */
|
||||
block_ptr++;
|
||||
}
|
||||
block_ptr += row_inc;
|
||||
}
|
||||
ADVANCE_BLOCK();
|
||||
}
|
||||
break;
|
||||
|
||||
// 16-color block encoding (every pixel is a different color)
|
||||
case 0xE0:
|
||||
n_blocks = (opcode & 0x0F) + 1;
|
||||
|
||||
while (n_blocks--)
|
||||
{
|
||||
block_ptr = row_ptr + pixel_ptr;
|
||||
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
||||
{
|
||||
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
||||
{
|
||||
color_index = encoded[stream_ptr++] * BYTES_PER_COLOR;
|
||||
decoded[block_ptr++] = palette_map[color_index + 0];
|
||||
decoded[block_ptr++] = palette_map[color_index + 1];
|
||||
decoded[block_ptr++] = palette_map[color_index + 2];
|
||||
if (bytes_per_pixel == 4) /* 32bpp */
|
||||
block_ptr++;
|
||||
}
|
||||
block_ptr += row_inc;
|
||||
}
|
||||
ADVANCE_BLOCK();
|
||||
}
|
||||
break;
|
||||
|
||||
case 0xF0:
|
||||
mp_msg(MSGT_DECVIDEO, MSGL_HINT, "0xF0 opcode seen in SMC chunk (MPlayer developers would like to know)\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user