mirror of
https://github.com/mpv-player/mpv
synced 2024-12-11 17:37:23 +00:00
073c1e07fc
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4077 b3059339-0415-0410-9bf9-f77b7e298cf2
710 lines
20 KiB
C
710 lines
20 KiB
C
/* ------------------------------------------------------------------------
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* Radius Cinepak Video Decoder
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*
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* Dr. Tim Ferguson, 2001.
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* For more details on the algorithm:
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* http://www.csse.monash.edu.au/~timf/videocodec.html
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*
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* This is basically a vector quantiser with adaptive vector density. The
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* frame is segmented into 4x4 pixel blocks, and each block is coded using
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* either 1 or 4 vectors.
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*
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* There are still some issues with this code yet to be resolved. In
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* particular with decoding in the strip boundaries.
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* ------------------------------------------------------------------------ */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <math.h>
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#include "config.h"
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#define DBUG 0
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#define MAX_STRIPS 32
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/* ------------------------------------------------------------------------ */
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typedef struct
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{
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unsigned char y0, y1, y2, y3;
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char u, v;
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unsigned long rgb0, rgb1, rgb2, rgb3; /* should be a union */
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unsigned char r[4], g[4], b[4];
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} cvid_codebook;
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typedef struct {
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cvid_codebook *v4_codebook[MAX_STRIPS];
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cvid_codebook *v1_codebook[MAX_STRIPS];
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int strip_num;
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} cinepak_info;
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/* ------------------------------------------------------------------------ */
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static unsigned char *in_buffer, uiclip[1024], *uiclp = NULL;
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#define SCALEBITS 16
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#define ONE_HALF ((long) 1 << (SCALEBITS-1))
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#define FIX(x) ((long) ((x) * (1L<<SCALEBITS) + 0.5))
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static long CU_Y_tab[256], CV_Y_tab[256], CU_Cb_tab[256], CV_Cb_tab[256],
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CU_Cr_tab[256], CV_Cr_tab[256];
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#define get_byte() *(in_buffer++)
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#define skip_byte() in_buffer++
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#define get_word() ((unsigned short)(in_buffer += 2, \
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(in_buffer[-2] << 8 | in_buffer[-1])))
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#define get_long() ((unsigned long)(in_buffer += 4, \
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(in_buffer[-4] << 24 | in_buffer[-3] << 16 | in_buffer[-2] << 8 | in_buffer[-1])))
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/* ---------------------------------------------------------------------- */
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static inline void read_codebook_yuy2(cvid_codebook *c, int mode)
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{
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unsigned char y0, y1, y2, y3, u, v;
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int y_uv;
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if(mode) /* black and white */
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{
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c->y0 = get_byte();
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c->y1 = get_byte();
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c->y2 = get_byte();
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c->y3 = get_byte();
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c->u = c->v = 128;
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}
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else /* colour */
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{
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y0 = get_byte(); /* luma */
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y1 = get_byte();
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y2 = get_byte();
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y3 = get_byte();
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u = 128+get_byte(); /* chroma */
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v = 128+get_byte();
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/* YUV * inv(CinYUV)
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* | Y | | 1 -0.0655 0.0110 | | CY |
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* | Cb | = | 0 1.1656 -0.0062 | | CU |
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* | Cr | | 0 0.0467 1.4187 | | CV |
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*/
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y_uv = (int)((CU_Y_tab[u] + CV_Y_tab[v]) >> SCALEBITS);
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c->y0 = uiclp[y0 + y_uv];
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c->y1 = uiclp[y1 + y_uv];
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c->y2 = uiclp[y2 + y_uv];
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c->y3 = uiclp[y3 + y_uv];
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c->u = uiclp[(int)((CU_Cb_tab[u] + CV_Cb_tab[v]) >> SCALEBITS)];
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c->v = uiclp[(int)((CU_Cr_tab[u] + CV_Cr_tab[v]) >> SCALEBITS)];
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}
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}
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//#define PACK_YUV(cb,y0,y1,u,v) ((cb->y0<<24)|(((unsigned char)cb->u)<<16)|(cb->y1<<8)|(((unsigned char)cb->v)))
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#define PACK_YUV(cb,y0,y1,u,v) ((((unsigned char)cb->v)<<24)|(cb->y1<<16)|(((unsigned char)cb->u)<<8)|(cb->y0))
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#define TO_YUY2_U0(cb) PACK_YUV(cb,y0,y0,u,v)
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#define TO_YUY2_U1(cb) PACK_YUV(cb,y1,y1,u,v)
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#define TO_YUY2_L0(cb) PACK_YUV(cb,y2,y2,u,v)
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#define TO_YUY2_L1(cb) PACK_YUV(cb,y3,y3,u,v)
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#define TO_YUY2_U(cb) PACK_YUV(cb,y0,y1,u,v)
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#define TO_YUY2_L(cb) PACK_YUV(cb,y2,y3,u,v)
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/* ------------------------------------------------------------------------ */
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inline void cvid_v1_yuy2(unsigned char *frm, unsigned char *end, int stride, cvid_codebook *cb)
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{
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unsigned long *vptr = (unsigned long *)frm, rgb;
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int row_inc = stride/4;
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vptr[0] = TO_YUY2_U0(cb);
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vptr[1] = TO_YUY2_U1(cb);
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = TO_YUY2_U0(cb);
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vptr[1] = TO_YUY2_U1(cb);
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = TO_YUY2_L0(cb);
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vptr[1] = TO_YUY2_L1(cb);
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = TO_YUY2_L0(cb);
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vptr[1] = TO_YUY2_L1(cb);
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}
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/* ------------------------------------------------------------------------ */
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inline void cvid_v4_yuy2(unsigned char *frm, unsigned char *end, int stride, cvid_codebook *cb0,
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cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
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{
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unsigned long *vptr = (unsigned long *)frm;
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int row_inc = stride/4;
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vptr[0] = TO_YUY2_U(cb0);
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vptr[1] = TO_YUY2_U(cb1);
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = TO_YUY2_L(cb0);
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vptr[1] = TO_YUY2_L(cb1);
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = TO_YUY2_U(cb2);
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vptr[1] = TO_YUY2_U(cb3);
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = TO_YUY2_L(cb2);
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vptr[1] = TO_YUY2_L(cb3);
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}
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/* ---------------------------------------------------------------------- */
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static inline void read_codebook_32(cvid_codebook *c, int mode)
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{
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int uvr, uvg, uvb;
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if(mode) /* black and white */
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{
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c->y0 = get_byte();
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c->y1 = get_byte();
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c->y2 = get_byte();
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c->y3 = get_byte();
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c->u = c->v = 0;
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c->rgb0 = (c->y0 << 16) | (c->y0 << 8) | c->y0;
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c->rgb1 = (c->y1 << 16) | (c->y1 << 8) | c->y1;
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c->rgb2 = (c->y2 << 16) | (c->y2 << 8) | c->y2;
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c->rgb3 = (c->y3 << 16) | (c->y3 << 8) | c->y3;
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}
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else /* colour */
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{
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c->y0 = get_byte(); /* luma */
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c->y1 = get_byte();
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c->y2 = get_byte();
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c->y3 = get_byte();
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c->u = get_byte(); /* chroma */
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c->v = get_byte();
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uvr = c->v << 1;
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uvg = -((c->u+1) >> 1) - c->v;
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uvb = c->u << 1;
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c->rgb0 = (uiclp[c->y0 + uvr] << 16) | (uiclp[c->y0 + uvg] << 8) | uiclp[c->y0 + uvb];
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c->rgb1 = (uiclp[c->y1 + uvr] << 16) | (uiclp[c->y1 + uvg] << 8) | uiclp[c->y1 + uvb];
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c->rgb2 = (uiclp[c->y2 + uvr] << 16) | (uiclp[c->y2 + uvg] << 8) | uiclp[c->y2 + uvb];
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c->rgb3 = (uiclp[c->y3 + uvr] << 16) | (uiclp[c->y3 + uvg] << 8) | uiclp[c->y3 + uvb];
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}
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}
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/* ------------------------------------------------------------------------ */
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inline void cvid_v1_32(unsigned char *frm, unsigned char *end, int stride, cvid_codebook *cb)
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{
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unsigned long *vptr = (unsigned long *)frm, rgb;
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int row_inc = stride/4;
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vptr[0] = rgb = cb->rgb0; vptr[1] = rgb;
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vptr[2] = rgb = cb->rgb1; vptr[3] = rgb;
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = rgb = cb->rgb0; vptr[1] = rgb;
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vptr[2] = rgb = cb->rgb1; vptr[3] = rgb;
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = rgb = cb->rgb2; vptr[1] = rgb;
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vptr[2] = rgb = cb->rgb3; vptr[3] = rgb;
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = rgb = cb->rgb2; vptr[1] = rgb;
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vptr[2] = rgb = cb->rgb3; vptr[3] = rgb;
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}
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/* ------------------------------------------------------------------------ */
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inline void cvid_v4_32(unsigned char *frm, unsigned char *end, int stride, cvid_codebook *cb0,
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cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
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{
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unsigned long *vptr = (unsigned long *)frm;
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int row_inc = stride/4;
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vptr[0] = cb0->rgb0;
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vptr[1] = cb0->rgb1;
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vptr[2] = cb1->rgb0;
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vptr[3] = cb1->rgb1;
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = cb0->rgb2;
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vptr[1] = cb0->rgb3;
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vptr[2] = cb1->rgb2;
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vptr[3] = cb1->rgb3;
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = cb2->rgb0;
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vptr[1] = cb2->rgb1;
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vptr[2] = cb3->rgb0;
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vptr[3] = cb3->rgb1;
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vptr += row_inc; if(vptr > (unsigned long *)end) return;
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vptr[0] = cb2->rgb2;
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vptr[1] = cb2->rgb3;
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vptr[2] = cb3->rgb2;
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vptr[3] = cb3->rgb3;
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}
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/* ---------------------------------------------------------------------- */
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static inline void read_codebook_24(cvid_codebook *c, int mode)
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{
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int uvr, uvg, uvb;
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if(mode) /* black and white */
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{
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c->y0 = get_byte();
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c->y1 = get_byte();
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c->y2 = get_byte();
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c->y3 = get_byte();
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c->u = c->v = 0;
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c->r[0] = c->g[0] = c->b[0] = c->y0;
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c->r[1] = c->g[1] = c->b[1] = c->y1;
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c->r[2] = c->g[2] = c->b[2] = c->y2;
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c->r[3] = c->g[3] = c->b[3] = c->y3;
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}
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else /* colour */
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{
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c->y0 = get_byte(); /* luma */
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c->y1 = get_byte();
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c->y2 = get_byte();
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c->y3 = get_byte();
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c->u = get_byte(); /* chroma */
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c->v = get_byte();
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uvr = c->v << 1;
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uvg = -((c->u+1) >> 1) - c->v;
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uvb = c->u << 1;
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c->r[0] = uiclp[c->y0 + uvr]; c->g[0] = uiclp[c->y0 + uvg]; c->b[0] = uiclp[c->y0 + uvb];
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c->r[1] = uiclp[c->y1 + uvr]; c->g[1] = uiclp[c->y1 + uvg]; c->b[1] = uiclp[c->y1 + uvb];
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c->r[2] = uiclp[c->y2 + uvr]; c->g[2] = uiclp[c->y2 + uvg]; c->b[2] = uiclp[c->y2 + uvb];
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c->r[3] = uiclp[c->y3 + uvr]; c->g[3] = uiclp[c->y3 + uvg]; c->b[3] = uiclp[c->y3 + uvb];
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}
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}
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/* ------------------------------------------------------------------------ */
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void cvid_v1_24(unsigned char *vptr, unsigned char *end, int stride, cvid_codebook *cb)
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{
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unsigned char r, g, b;
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int row_inc = stride-4*3;
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*vptr++ = b = cb->b[0]; *vptr++ = g = cb->g[0]; *vptr++ = r = cb->r[0];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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*vptr++ = b = cb->b[1]; *vptr++ = g = cb->g[1]; *vptr++ = r = cb->r[1];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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vptr += row_inc; if(vptr > end) return;
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*vptr++ = b = cb->b[0]; *vptr++ = g = cb->g[0]; *vptr++ = r = cb->r[0];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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*vptr++ = b = cb->b[1]; *vptr++ = g = cb->g[1]; *vptr++ = r = cb->r[1];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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vptr += row_inc; if(vptr > end) return;
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*vptr++ = b = cb->b[2]; *vptr++ = g = cb->g[2]; *vptr++ = r = cb->r[2];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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*vptr++ = b = cb->b[3]; *vptr++ = g = cb->g[3]; *vptr++ = r = cb->r[3];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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vptr += row_inc; if(vptr > end) return;
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*vptr++ = b = cb->b[2]; *vptr++ = g = cb->g[2]; *vptr++ = r = cb->r[2];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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*vptr++ = b = cb->b[3]; *vptr++ = g = cb->g[3]; *vptr++ = r = cb->r[3];
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*vptr++ = b; *vptr++ = g; *vptr++ = r;
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}
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/* ------------------------------------------------------------------------ */
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void cvid_v4_24(unsigned char *vptr, unsigned char *end, int stride, cvid_codebook *cb0,
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cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3)
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{
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int row_inc = stride-4*3;
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*vptr++ = cb0->b[0]; *vptr++ = cb0->g[0]; *vptr++ = cb0->r[0];
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*vptr++ = cb0->b[1]; *vptr++ = cb0->g[1]; *vptr++ = cb0->r[1];
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*vptr++ = cb1->b[0]; *vptr++ = cb1->g[0]; *vptr++ = cb1->r[0];
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*vptr++ = cb1->b[1]; *vptr++ = cb1->g[1]; *vptr++ = cb1->r[1];
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vptr += row_inc; if(vptr > end) return;
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*vptr++ = cb0->b[2]; *vptr++ = cb0->g[2]; *vptr++ = cb0->r[2];
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*vptr++ = cb0->b[3]; *vptr++ = cb0->g[3]; *vptr++ = cb0->r[3];
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*vptr++ = cb1->b[2]; *vptr++ = cb1->g[2]; *vptr++ = cb1->r[2];
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*vptr++ = cb1->b[3]; *vptr++ = cb1->g[3]; *vptr++ = cb1->r[3];
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vptr += row_inc; if(vptr > end) return;
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*vptr++ = cb2->b[0]; *vptr++ = cb2->g[0]; *vptr++ = cb2->r[0];
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*vptr++ = cb2->b[1]; *vptr++ = cb2->g[1]; *vptr++ = cb2->r[1];
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*vptr++ = cb3->b[0]; *vptr++ = cb3->g[0]; *vptr++ = cb3->r[0];
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*vptr++ = cb3->b[1]; *vptr++ = cb3->g[1]; *vptr++ = cb3->r[1];
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vptr += row_inc; if(vptr > end) return;
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*vptr++ = cb2->b[2]; *vptr++ = cb2->g[2]; *vptr++ = cb2->r[2];
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*vptr++ = cb2->b[3]; *vptr++ = cb2->g[3]; *vptr++ = cb2->r[3];
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*vptr++ = cb3->b[2]; *vptr++ = cb3->g[2]; *vptr++ = cb3->r[2];
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*vptr++ = cb3->b[3]; *vptr++ = cb3->g[3]; *vptr++ = cb3->r[3];
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}
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/* ------------------------------------------------------------------------
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* Call this function once at the start of the sequence and save the
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* returned context for calls to decode_cinepak().
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*/
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void *decode_cinepak_init(void)
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{
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cinepak_info *cvinfo;
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int i, x;
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if((cvinfo = calloc(sizeof(cinepak_info), 1)) == NULL) return NULL;
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cvinfo->strip_num = 0;
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if(uiclp == NULL)
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{
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uiclp = uiclip+512;
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for(i = -512; i < 512; i++)
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uiclp[i] = (i < 0 ? 0 : (i > 255 ? 255 : i));
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}
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for(i = 0, x = -128; i < 256; i++, x++)
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{
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CU_Y_tab[i] = (-FIX(0.0655)) * x;
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CV_Y_tab[i] = (FIX(0.0110)) * x + ONE_HALF;
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CU_Cb_tab[i] = (FIX(1.1656)) * x;
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CV_Cb_tab[i] = (-FIX(0.0062)) * x + ONE_HALF + FIX(128);
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CU_Cr_tab[i] = (FIX(0.0467)) * x;
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CV_Cr_tab[i] = (FIX(1.4187)) * x + ONE_HALF + FIX(128);
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}
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return (void *)cvinfo;
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}
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/* ------------------------------------------------------------------------
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* This function decodes a buffer containing a Cinepak encoded frame.
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*
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* context - the context created by decode_cinepak_init().
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* buf - the input buffer to be decoded
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* size - the size of the input buffer
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* frame - the output frame buffer (24 or 32 bit per pixel)
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|
* width - the width of the output frame
|
|
* height - the height of the output frame
|
|
* bit_per_pixel - the number of bits per pixel allocated to the output
|
|
* frame (only 24 or 32 bpp are supported)
|
|
*/
|
|
void decode_cinepak(void *context, unsigned char *buf, int size, unsigned char *frame, int width, int height, int bit_per_pixel)
|
|
{
|
|
cinepak_info *cvinfo = (cinepak_info *)context;
|
|
cvid_codebook *v4_codebook, *v1_codebook, *codebook = NULL;
|
|
unsigned long x, y, y_bottom, frame_flags, strips, cv_width, cv_height, cnum,
|
|
strip_id, chunk_id, x0, y0, x1, y1, ci, flag, mask;
|
|
long len, top_size, chunk_size;
|
|
unsigned char *frm_ptr, *frm_end;
|
|
int i, cur_strip, d0, d1, d2, d3, frm_stride, bpp = 3;
|
|
void (*read_codebook)(cvid_codebook *c, int mode) = read_codebook_24;
|
|
void (*cvid_v1)(unsigned char *frm, unsigned char *end, int stride, cvid_codebook *cb) = cvid_v1_24;
|
|
void (*cvid_v4)(unsigned char *frm, unsigned char *end, int stride, cvid_codebook *cb0,
|
|
cvid_codebook *cb1, cvid_codebook *cb2, cvid_codebook *cb3) = cvid_v4_24;
|
|
|
|
x = y = 0;
|
|
y_bottom = 0;
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|
in_buffer = buf;
|
|
|
|
frame_flags = get_byte();
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|
len = get_byte() << 16;
|
|
len |= get_byte() << 8;
|
|
len |= get_byte();
|
|
|
|
switch(bit_per_pixel)
|
|
{
|
|
case 16:
|
|
bpp = 2;
|
|
read_codebook = read_codebook_yuy2;
|
|
cvid_v1 = cvid_v1_yuy2;
|
|
cvid_v4 = cvid_v4_yuy2;
|
|
break;
|
|
case 24:
|
|
bpp = 3;
|
|
read_codebook = read_codebook_24;
|
|
cvid_v1 = cvid_v1_24;
|
|
cvid_v4 = cvid_v4_24;
|
|
break;
|
|
case 32:
|
|
bpp = 4;
|
|
read_codebook = read_codebook_32;
|
|
cvid_v1 = cvid_v1_32;
|
|
cvid_v4 = cvid_v4_32;
|
|
break;
|
|
}
|
|
|
|
frm_stride = width * bpp;
|
|
frm_ptr = frame;
|
|
frm_end = frm_ptr + width * height * bpp;
|
|
|
|
if(len != size)
|
|
{
|
|
if(len & 0x01) len++; /* AVIs tend to have a size mismatch */
|
|
if(len != size)
|
|
{
|
|
printf("CVID: corruption %d (QT/AVI) != %ld (CV)\n", size, len);
|
|
// return;
|
|
}
|
|
}
|
|
|
|
cv_width = get_word();
|
|
cv_height = get_word();
|
|
strips = get_word();
|
|
|
|
if(strips > cvinfo->strip_num)
|
|
{
|
|
if(strips >= MAX_STRIPS)
|
|
{
|
|
printf("CVID: strip overflow (more than %d)\n", MAX_STRIPS);
|
|
return;
|
|
}
|
|
|
|
for(i = cvinfo->strip_num; i < strips; i++)
|
|
{
|
|
if((cvinfo->v4_codebook[i] = (cvid_codebook *)calloc(sizeof(cvid_codebook), 260)) == NULL)
|
|
{
|
|
printf("CVID: codebook v4 alloc err\n");
|
|
return;
|
|
}
|
|
|
|
if((cvinfo->v1_codebook[i] = (cvid_codebook *)calloc(sizeof(cvid_codebook), 260)) == NULL)
|
|
{
|
|
printf("CVID: codebook v1 alloc err\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
cvinfo->strip_num = strips;
|
|
|
|
#if DBUG
|
|
printf("CVID: <%ld,%ld> strips %ld\n", cv_width, cv_height, strips);
|
|
#endif
|
|
|
|
for(cur_strip = 0; cur_strip < strips; cur_strip++)
|
|
{
|
|
v4_codebook = cvinfo->v4_codebook[cur_strip];
|
|
v1_codebook = cvinfo->v1_codebook[cur_strip];
|
|
|
|
if((cur_strip > 0) && (!(frame_flags & 0x01)))
|
|
{
|
|
memcpy(cvinfo->v4_codebook[cur_strip], cvinfo->v4_codebook[cur_strip-1], 260 * sizeof(cvid_codebook));
|
|
memcpy(cvinfo->v1_codebook[cur_strip], cvinfo->v1_codebook[cur_strip-1], 260 * sizeof(cvid_codebook));
|
|
}
|
|
|
|
strip_id = get_word(); /* 1000 = key strip, 1100 = iter strip */
|
|
top_size = get_word();
|
|
y0 = get_word(); /* FIXME: most of these are ignored at the moment */
|
|
x0 = get_word();
|
|
y1 = get_word();
|
|
x1 = get_word();
|
|
|
|
y_bottom += y1;
|
|
top_size -= 12;
|
|
x = 0;
|
|
if(x1 != width)
|
|
printf("CVID: Warning x1 (%ld) != width (%d)\n", x1, width);
|
|
|
|
#if DBUG
|
|
printf(" %d) %04lx %04ld <%ld,%ld> <%ld,%ld> yt %ld %d\n",
|
|
cur_strip, strip_id, top_size, x0, y0, x1, y1, y_bottom);
|
|
#endif
|
|
|
|
while(top_size > 0)
|
|
{
|
|
chunk_id = get_word();
|
|
chunk_size = get_word();
|
|
|
|
#if DBUG
|
|
printf(" %04lx %04ld\n", chunk_id, chunk_size);
|
|
#endif
|
|
top_size -= chunk_size;
|
|
chunk_size -= 4;
|
|
|
|
switch(chunk_id)
|
|
{
|
|
/* -------------------- Codebook Entries -------------------- */
|
|
case 0x2000:
|
|
case 0x2200:
|
|
codebook = (chunk_id == 0x2200 ? v1_codebook : v4_codebook);
|
|
cnum = chunk_size/6;
|
|
for(i = 0; i < cnum; i++) read_codebook(codebook+i, 0);
|
|
break;
|
|
|
|
case 0x2400:
|
|
case 0x2600: /* 8 bit per pixel */
|
|
codebook = (chunk_id == 0x2600 ? v1_codebook : v4_codebook);
|
|
cnum = chunk_size/4;
|
|
for(i = 0; i < cnum; i++) read_codebook(codebook+i, 1);
|
|
break;
|
|
|
|
case 0x2100:
|
|
case 0x2300:
|
|
codebook = (chunk_id == 0x2300 ? v1_codebook : v4_codebook);
|
|
|
|
ci = 0;
|
|
while(chunk_size > 0)
|
|
{
|
|
flag = get_long();
|
|
chunk_size -= 4;
|
|
|
|
for(i = 0; i < 32; i++)
|
|
{
|
|
if(flag & 0x80000000)
|
|
{
|
|
chunk_size -= 6;
|
|
read_codebook(codebook+ci, 0);
|
|
}
|
|
|
|
ci++;
|
|
flag <<= 1;
|
|
}
|
|
}
|
|
while(chunk_size > 0) { skip_byte(); chunk_size--; }
|
|
break;
|
|
|
|
case 0x2500:
|
|
case 0x2700: /* 8 bit per pixel */
|
|
codebook = (chunk_id == 0x2700 ? v1_codebook : v4_codebook);
|
|
|
|
ci = 0;
|
|
while(chunk_size > 0)
|
|
{
|
|
flag = get_long();
|
|
chunk_size -= 4;
|
|
|
|
for(i = 0; i < 32; i++)
|
|
{
|
|
if(flag & 0x80000000)
|
|
{
|
|
chunk_size -= 4;
|
|
read_codebook(codebook+ci, 1);
|
|
}
|
|
|
|
ci++;
|
|
flag <<= 1;
|
|
}
|
|
}
|
|
while(chunk_size > 0) { skip_byte(); chunk_size--; }
|
|
break;
|
|
|
|
/* -------------------- Frame -------------------- */
|
|
case 0x3000:
|
|
while((chunk_size > 0) && (y < y_bottom))
|
|
{
|
|
flag = get_long();
|
|
chunk_size -= 4;
|
|
|
|
for(i = 0; i < 32; i++)
|
|
{
|
|
if(y >= y_bottom) break;
|
|
if(flag & 0x80000000) /* 4 bytes per block */
|
|
{
|
|
d0 = get_byte();
|
|
d1 = get_byte();
|
|
d2 = get_byte();
|
|
d3 = get_byte();
|
|
chunk_size -= 4;
|
|
cvid_v4(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v4_codebook+d0, v4_codebook+d1, v4_codebook+d2, v4_codebook+d3);
|
|
}
|
|
else /* 1 byte per block */
|
|
{
|
|
cvid_v1(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v1_codebook + get_byte());
|
|
chunk_size--;
|
|
}
|
|
|
|
x += 4;
|
|
if(x >= width)
|
|
{
|
|
x = 0;
|
|
y += 4;
|
|
}
|
|
flag <<= 1;
|
|
}
|
|
}
|
|
while(chunk_size > 0) { skip_byte(); chunk_size--; }
|
|
break;
|
|
|
|
case 0x3100:
|
|
while((chunk_size > 0) && (y < y_bottom))
|
|
{
|
|
/* ---- flag bits: 0 = SKIP, 10 = V1, 11 = V4 ---- */
|
|
flag = (unsigned long)get_long();
|
|
chunk_size -= 4;
|
|
mask = 0x80000000;
|
|
|
|
while((mask) && (y < y_bottom))
|
|
{
|
|
if(flag & mask)
|
|
{
|
|
if(mask == 1)
|
|
{
|
|
if(chunk_size < 0) break;
|
|
flag = (unsigned long)get_long();
|
|
chunk_size -= 4;
|
|
mask = 0x80000000;
|
|
}
|
|
else mask >>= 1;
|
|
|
|
if(flag & mask) /* V4 */
|
|
{
|
|
d0 = get_byte();
|
|
d1 = get_byte();
|
|
d2 = get_byte();
|
|
d3 = get_byte();
|
|
chunk_size -= 4;
|
|
cvid_v4(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v4_codebook+d0, v4_codebook+d1, v4_codebook+d2, v4_codebook+d3);
|
|
}
|
|
else /* V1 */
|
|
{
|
|
chunk_size--;
|
|
cvid_v1(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v1_codebook + get_byte());
|
|
}
|
|
} /* else SKIP */
|
|
|
|
mask >>= 1;
|
|
x += 4;
|
|
if(x >= width)
|
|
{
|
|
x = 0;
|
|
y += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
while(chunk_size > 0) { skip_byte(); chunk_size--; }
|
|
break;
|
|
|
|
case 0x3200: /* each byte is a V1 codebook */
|
|
while((chunk_size > 0) && (y < y_bottom))
|
|
{
|
|
cvid_v1(frm_ptr + (y * frm_stride + x * bpp), frm_end, frm_stride, v1_codebook + get_byte());
|
|
chunk_size--;
|
|
x += 4;
|
|
if(x >= width)
|
|
{
|
|
x = 0;
|
|
y += 4;
|
|
}
|
|
}
|
|
while(chunk_size > 0) { skip_byte(); chunk_size--; }
|
|
break;
|
|
|
|
default:
|
|
printf("CVID: unknown chunk_id %08lx\n", chunk_id);
|
|
while(chunk_size > 0) { skip_byte(); chunk_size--; }
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(len != size)
|
|
{
|
|
if(len & 0x01) len++; /* AVIs tend to have a size mismatch */
|
|
if(len != size)
|
|
{
|
|
long xlen;
|
|
skip_byte();
|
|
xlen = get_byte() << 16;
|
|
xlen |= get_byte() << 8;
|
|
xlen |= get_byte(); /* Read Len */
|
|
printf("CVID: END INFO chunk size %d cvid size1 %ld cvid size2 %ld\n", size, len, xlen);
|
|
}
|
|
}
|
|
}
|
|
|