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cosmetics and function rename 

patch by Vitor ken1001 gmail com | sed -e s/ken/vitor/
reference thread:
subject: [FFmpeg-devel] [PATCH] RoQ video encoder, take 2
date: 05/27/2007 12:21 PM

Originally committed as revision 9147 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Vitor Sessak Benoit Fouet 18 years ago
parent
828bb5f1f6
commit
750cbd34c9
1 changed files with 47 additions and 50 deletions
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  1. +47
    -50
      libavcodec/roqvideo.c

+ 47
- 50
libavcodec/roqvideo.c View File

@@ -36,16 +36,16 @@
#include "dsputil.h"

typedef struct {
unsigned char y0, y1, y2, y3, u, v;
unsigned char y[4];
unsigned char u, v;
} roq_cell;

typedef struct {
int idx[4];
} roq_qcell;

static int uiclip[1024], *uiclp; /* clipping table */
#define avg2(a,b) uiclp[(((int)(a)+(int)(b)+1)>>1)]
#define avg4(a,b,c,d) uiclp[(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2)]
#define avg2(a,b) av_clip_uint8(((int)(a)+(int)(b)+1)>>1)
#define avg4(a,b,c,d) av_clip_uint8(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2)

typedef struct RoqContext {

@@ -80,21 +80,21 @@ typedef struct RoqContext {
#define get_byte(in_buffer) *(in_buffer++)


static void apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
{
unsigned char *yptr;

yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
*yptr++ = cell->y0;
*yptr++ = cell->y1;
*yptr++ = cell->y[0];
*yptr++ = cell->y[1];
yptr += (ri->y_stride - 2);
*yptr++ = cell->y2;
*yptr++ = cell->y3;
*yptr++ = cell->y[2];
*yptr++ = cell->y[3];
ri->current_frame->data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
ri->current_frame->data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
}

static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
{
unsigned long row_inc, c_row_inc;
register unsigned char y0, y1, u, v;
@@ -106,9 +106,9 @@ static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)

row_inc = ri->y_stride - 4;
c_row_inc = (ri->c_stride) - 2;
*yptr++ = y0 = cell->y0; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
*yptr++ = y0 = cell->y[0]; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
*yptr++ = y0;
*yptr++ = y1 = cell->y1; *uptr++ = u; *vptr++ = v;
*yptr++ = y1 = cell->y[1]; *uptr++ = u; *vptr++ = v;
*yptr++ = y1;

yptr += row_inc;
@@ -120,9 +120,9 @@ static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)

yptr += row_inc; uptr += c_row_inc; vptr += c_row_inc;

*yptr++ = y0 = cell->y2; *uptr++ = u; *vptr++ = v;
*yptr++ = y0 = cell->y[2]; *uptr++ = u; *vptr++ = v;
*yptr++ = y0;
*yptr++ = y1 = cell->y3; *uptr++ = u; *vptr++ = v;
*yptr++ = y1 = cell->y[3]; *uptr++ = u; *vptr++ = v;
*yptr++ = y1;

yptr += row_inc;
@@ -133,14 +133,14 @@ static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
*yptr++ = y1;
}

static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
signed char mean_x, signed char mean_y)
void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
int deltax, int deltay)
{
int i, hw, mx, my;
unsigned char *pa, *pb;

mx = x + 8 - (mv >> 4) - mean_x;
my = y + 8 - (mv & 0xf) - mean_y;
mx = x + deltax;
my = y + deltay;

/* check MV against frame boundaries */
if ((mx < 0) || (mx > ri->avctx->width - 4) ||
@@ -202,14 +202,14 @@ static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
}
}

static void apply_motion_8x8(RoqContext *ri, int x, int y,
unsigned char mv, signed char mean_x, signed char mean_y)
void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
int deltax, int deltay)
{
int mx, my, i, j, hw;
unsigned char *pa, *pb;

mx = x + 8 - (mv >> 4) - mean_x;
my = y + 8 - (mv & 0xf) - mean_y;
mx = x + deltax;
my = y + deltay;

/* check MV against frame boundaries */
if ((mx < 0) || (mx > ri->avctx->width - 8) ||
@@ -283,7 +283,7 @@ static void roqvideo_decode_frame(RoqContext *ri)
unsigned int chunk_id = 0, chunk_arg = 0;
unsigned long chunk_size = 0;
int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
int vqid, bpos, xpos, ypos, xp, yp, x, y;
int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my;
int frame_stats[2][4] = {{0},{0}};
roq_qcell *qcell;
unsigned char *buf = ri->buf;
@@ -302,10 +302,10 @@ static void roqvideo_decode_frame(RoqContext *ri)
if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
nv2 = 256;
for(i = 0; i < nv1; i++) {
ri->cells[i].y0 = get_byte(buf);
ri->cells[i].y1 = get_byte(buf);
ri->cells[i].y2 = get_byte(buf);
ri->cells[i].y3 = get_byte(buf);
ri->cells[i].y[0] = get_byte(buf);
ri->cells[i].y[1] = get_byte(buf);
ri->cells[i].y[2] = get_byte(buf);
ri->cells[i].y[3] = get_byte(buf);
ri->cells[i].u = get_byte(buf);
ri->cells[i].v = get_byte(buf);
}
@@ -329,18 +329,19 @@ static void roqvideo_decode_frame(RoqContext *ri)

switch(vqid) {
case RoQ_ID_MOT:
apply_motion_8x8(ri, xp, yp, 0, 8, 8);
ff_apply_motion_8x8(ri, xp, yp, 0, 0);
break;
case RoQ_ID_FCC:
apply_motion_8x8(ri, xp, yp, buf[bpos++], chunk_arg >> 8,
chunk_arg & 0xff);
mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
ff_apply_motion_8x8(ri, xp, yp, mx, my);
break;
case RoQ_ID_SLD:
qcell = ri->qcells + buf[bpos++];
apply_vector_4x4(ri, xp, yp, ri->cells + qcell->idx[0]);
apply_vector_4x4(ri, xp+4, yp, ri->cells + qcell->idx[1]);
apply_vector_4x4(ri, xp, yp+4, ri->cells + qcell->idx[2]);
apply_vector_4x4(ri, xp+4, yp+4, ri->cells + qcell->idx[3]);
ff_apply_vector_4x4(ri, xp, yp, ri->cells + qcell->idx[0]);
ff_apply_vector_4x4(ri, xp+4, yp, ri->cells + qcell->idx[1]);
ff_apply_vector_4x4(ri, xp, yp+4, ri->cells + qcell->idx[2]);
ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cells + qcell->idx[3]);
break;
case RoQ_ID_CCC:
for (k = 0; k < 4; k++) {
@@ -358,24 +359,25 @@ static void roqvideo_decode_frame(RoqContext *ri)
vqflg_pos--;
switch(vqid) {
case RoQ_ID_MOT:
apply_motion_4x4(ri, x, y, 0, 8, 8);
ff_apply_motion_4x4(ri, x, y, 0, 0);
break;
case RoQ_ID_FCC:
apply_motion_4x4(ri, x, y, buf[bpos++],
chunk_arg >> 8, chunk_arg & 0xff);
mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
ff_apply_motion_4x4(ri, x, y, mx, my);
break;
case RoQ_ID_SLD:
qcell = ri->qcells + buf[bpos++];
apply_vector_2x2(ri, x, y, ri->cells + qcell->idx[0]);
apply_vector_2x2(ri, x+2, y, ri->cells + qcell->idx[1]);
apply_vector_2x2(ri, x, y+2, ri->cells + qcell->idx[2]);
apply_vector_2x2(ri, x+2, y+2, ri->cells + qcell->idx[3]);
ff_apply_vector_2x2(ri, x, y, ri->cells + qcell->idx[0]);
ff_apply_vector_2x2(ri, x+2, y, ri->cells + qcell->idx[1]);
ff_apply_vector_2x2(ri, x, y+2, ri->cells + qcell->idx[2]);
ff_apply_vector_2x2(ri, x+2, y+2, ri->cells + qcell->idx[3]);
break;
case RoQ_ID_CCC:
apply_vector_2x2(ri, x, y, ri->cells + buf[bpos]);
apply_vector_2x2(ri, x+2, y, ri->cells + buf[bpos+1]);
apply_vector_2x2(ri, x, y+2, ri->cells + buf[bpos+2]);
apply_vector_2x2(ri, x+2, y+2, ri->cells + buf[bpos+3]);
ff_apply_vector_2x2(ri, x, y, ri->cells + buf[bpos]);
ff_apply_vector_2x2(ri, x+2, y, ri->cells + buf[bpos+1]);
ff_apply_vector_2x2(ri, x, y+2, ri->cells + buf[bpos+2]);
ff_apply_vector_2x2(ri, x+2, y+2, ri->cells + buf[bpos+3]);
bpos += 4;
break;
}
@@ -400,7 +402,6 @@ static void roqvideo_decode_frame(RoqContext *ri)
static int roq_decode_init(AVCodecContext *avctx)
{
RoqContext *s = avctx->priv_data;
int i;

s->avctx = avctx;
s->first_frame = 1;
@@ -409,10 +410,6 @@ static int roq_decode_init(AVCodecContext *avctx)
avctx->pix_fmt = PIX_FMT_YUV420P;
dsputil_init(&s->dsp, avctx);

uiclp = uiclip+512;
for(i = -512; i < 512; i++)
uiclp[i] = (i < 0 ? 0 : (i > 255 ? 255 : i));

return 0;
}



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