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tenebrae2/roq/roq_read.c
cholleme ab9d205941 Videos as textures
2003-03-15 19:51:20 +00:00

592 lines
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/* ------------------------------------------------------------------------
* Id Software's RoQ video file format decoder
*
* Dr. Tim Ferguson, 2001.
* For more details on the algorithm:
* http://www.csse.monash.edu.au/~timf/videocodec.html
*
* This is a simple decoder for the Id Software RoQ video format. In
* this format, audio samples are DPCM coded and the video frames are
* coded using motion blocks and vector quantisation.
*
* Note: All information on the RoQ file format has been obtained through
* pure reverse engineering. This was achieved by giving known input
* audio and video frames to the roq.exe encoder and analysing the
* resulting output text and RoQ file. No decompiling of the Quake III
* Arena game was required.
*
* You may freely use this source code. I only ask that you reference its
* source in your projects documentation:
* Tim Ferguson: http://www.csse.monash.edu.au/~timf/
* ------------------------------------------------------------------------ */
/*
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
*/
#include "..\quakedef.h"
#include "roq.h"
#define DBUG 0
/* -------------------------------------------------------------------------- */
static unsigned int get_word(FILE *fp)
{
unsigned int ret;
ret = ((fgetc(fp)) & 0xff);
ret |= ((fgetc(fp)) & 0xff) << 8;
return(ret);
}
/* -------------------------------------------------------------------------- */
static unsigned long get_long(FILE *fp)
{
unsigned long ret;
ret = ((fgetc(fp)) & 0xff);
ret |= ((fgetc(fp)) & 0xff) << 8;
ret |= ((fgetc(fp)) & 0xff) << 16;
ret |= ((fgetc(fp)) & 0xff) << 24;
return(ret);
}
/* -------------------------------------------------------------------------- */
static int roq_parse_file(FILE *fp, roq_info *ri)
{
unsigned int head1, head3, chunk_id, chunk_arg;
long head2, chunk_size;
long fpos;
int max_frame;
ri->num_audio_bytes = ri->num_frames = max_frame = 0;
ri->audio_channels = 0;
ri->frame_offset = NULL;
ri->buf_size = 0;
head1 = get_word(fp);
head2 = get_long(fp);
head3 = get_word(fp);
if(head1 != 0x1084 && head2 != 0xffffffff && head3 != 0x1e)
{
printf("Not an RoQ file.\n");
return 1;
}
ri->roq_start = ftell(fp);
while(!feof(fp))
{
#if DBUG > 20
printf("---------------------------------------------------------------------------\n");
#endif
fpos = ftell(fp);
chunk_id = get_word(fp);
chunk_size = get_long(fp);
chunk_arg = get_word(fp);
if(chunk_size > ri->buf_size) ri->buf_size = chunk_size;
if(feof(fp)) break;
#if DBUG > 20
printf("%03d 0x%06lx: chunk: 0x%02x size: %ld cells: 2x2=%d,4x4=%d\n", i,
fpos, chunk_id, chunk_size, v1>>8,v1&0xff);
#endif
if(chunk_id == RoQ_INFO) /* video info */
{
ri->width = get_word(fp);
ri->height = get_word(fp);
get_word(fp);
get_word(fp);
}
else
{
if(chunk_id == RoQ_QUAD_VQ)
{
ri->num_frames++;
if(ri->num_frames > max_frame)
{
max_frame += 5000;
if((ri->frame_offset = realloc(ri->frame_offset, sizeof(long) * max_frame)) == NULL) return 1;
}
ri->frame_offset[ri->num_frames] = fpos;
}
if(chunk_id == RoQ_SOUND_MONO || chunk_id == RoQ_SOUND_STEREO)
{
if(chunk_id == RoQ_SOUND_MONO) ri->audio_channels = 1;
else ri->audio_channels = 2;
ri->num_audio_bytes += chunk_size;
}
fseek(fp, chunk_size, SEEK_CUR);
}
}
return 0;
}
/* -------------------------------------------------------------------------- */
static void apply_vector_2x2(roq_info *ri, int x, int y, roq_cell *cell)
{
unsigned char *yptr;
yptr = ri->y[0] + (y * ri->width) + x;
*yptr++ = cell->y0;
*yptr++ = cell->y1;
yptr += (ri->width - 2);
*yptr++ = cell->y2;
*yptr++ = cell->y3;
ri->u[0][(y/2) * (ri->width/2) + x/2] = cell->u;
ri->v[0][(y/2) * (ri->width/2) + x/2] = cell->v;
}
/* -------------------------------------------------------------------------- */
static void apply_vector_4x4(roq_info *ri, int x, int y, roq_cell *cell)
{
unsigned long row_inc, c_row_inc;
register unsigned char y0, y1, u, v;
unsigned char *yptr, *uptr, *vptr;
yptr = ri->y[0] + (y * ri->width) + x;
uptr = ri->u[0] + (y/2) * (ri->width/2) + x/2;
vptr = ri->v[0] + (y/2) * (ri->width/2) + x/2;
row_inc = ri->width - 4;
c_row_inc = (ri->width/2) - 2;
*yptr++ = y0 = cell->y0; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
*yptr++ = y0;
*yptr++ = y1 = cell->y1; *uptr++ = u; *vptr++ = v;
*yptr++ = y1;
yptr += row_inc;
*yptr++ = y0;
*yptr++ = y0;
*yptr++ = y1;
*yptr++ = y1;
yptr += row_inc; uptr += c_row_inc; vptr += c_row_inc;
*yptr++ = y0 = cell->y2; *uptr++ = u; *vptr++ = v;
*yptr++ = y0;
*yptr++ = y1 = cell->y3; *uptr++ = u; *vptr++ = v;
*yptr++ = y1;
yptr += row_inc;
*yptr++ = y0;
*yptr++ = y0;
*yptr++ = y1;
*yptr++ = y1;
}
/* -------------------------------------------------------------------------- */
static void apply_motion_4x4(roq_info *ri, int x, int y, unsigned char mv, char mean_x, char mean_y)
{
int i, mx, my;
unsigned char *pa, *pb;
mx = x + 8 - (mv >> 4) - mean_x;
my = y + 8 - (mv & 0xf) - mean_y;
pa = ri->y[0] + (y * ri->width) + x;
pb = ri->y[1] + (my * ri->width) + mx;
for(i = 0; i < 4; i++)
{
pa[0] = pb[0];
pa[1] = pb[1];
pa[2] = pb[2];
pa[3] = pb[3];
pa += ri->width;
pb += ri->width;
}
pa = ri->u[0] + (y/2) * (ri->width/2) + x/2;
pb = ri->u[1] + (my/2) * (ri->width/2) + (mx + 1)/2;
for(i = 0; i < 2; i++)
{
pa[0] = pb[0];
pa[1] = pb[1];
pa += ri->width/2;
pb += ri->width/2;
}
pa = ri->v[0] + (y/2) * (ri->width/2) + x/2;
pb = ri->v[1] + (my/2) * (ri->width/2) + (mx + 1)/2;
for(i = 0; i < 2; i++)
{
pa[0] = pb[0];
pa[1] = pb[1];
pa += ri->width/2;
pb += ri->width/2;
}
}
/* -------------------------------------------------------------------------- */
static void apply_motion_8x8(roq_info *ri, int x, int y, unsigned char mv, char mean_x, char mean_y)
{
int mx, my, i;
unsigned char *pa, *pb;
mx = x + 8 - (mv >> 4) - mean_x;
my = y + 8 - (mv & 0xf) - mean_y;
pa = ri->y[0] + (y * ri->width) + x;
pb = ri->y[1] + (my * ri->width) + mx;
for(i = 0; i < 8; i++)
{
pa[0] = pb[0];
pa[1] = pb[1];
pa[2] = pb[2];
pa[3] = pb[3];
pa[4] = pb[4];
pa[5] = pb[5];
pa[6] = pb[6];
pa[7] = pb[7];
pa += ri->width;
pb += ri->width;
}
pa = ri->u[0] + (y/2) * (ri->width/2) + x/2;
pb = ri->u[1] + (my/2) * (ri->width/2) + (mx + 1)/2;
for(i = 0; i < 4; i++)
{
pa[0] = pb[0];
pa[1] = pb[1];
pa[2] = pb[2];
pa[3] = pb[3];
pa += ri->width/2;
pb += ri->width/2;
}
pa = ri->v[0] + (y/2) * (ri->width/2) + x/2;
pb = ri->v[1] + (my/2) * (ri->width/2) + (mx + 1)/2;
for(i = 0; i < 4; i++)
{
pa[0] = pb[0];
pa[1] = pb[1];
pa[2] = pb[2];
pa[3] = pb[3];
pa += ri->width/2;
pb += ri->width/2;
}
}
/* -------------------------------------------------------------------------- */
roq_info *roq_open(char *fname)
{
FILE *fp;
roq_info *ri;
int i;
if (COM_FOpenFile(fname, &fp) < 0) {
Con_Printf("File not found %s\n",fname);
return NULL;
}
if(fp == NULL) {
Con_Printf("File not found %s\n",fname);
return NULL;
}
if((ri = malloc(sizeof(roq_info))) == NULL) {
Con_Printf("Error allocating memory.\n");
return NULL;
}
ri->fp = fp;
if(roq_parse_file(fp, ri)) return NULL;
ri->stream_length = (ri->num_frames * 1000)/30;
for(i = 0; i < 128; i++)
{
ri->snd_sqr_arr[i] = i * i;
ri->snd_sqr_arr[i + 128] = -(i * i);
}
for(i = 0; i < 2; i++)
{
if((ri->y[i] = calloc(ri->width * ri->height, 1)) == NULL ||
(ri->u[i] = calloc((ri->width * ri->height)/4, 1)) == NULL ||
(ri->v[i] = calloc((ri->width * ri->height)/4, 1)) == NULL)
{
printf("Memory allocation error.\n");
return NULL;
}
}
ri->buf_size *= 2;
if((ri->buf = calloc(ri->buf_size, 1)) == NULL)
{
printf("Memory allocation error.\n");
return NULL;
}
ri->audio_buf_size = 0;
ri->audio = NULL;
ri->frame_num = 0;
ri->aud_pos = ri->vid_pos = ri->roq_start;
ri->lastframe_time = -1;
return ri;
}
/* -------------------------------------------------------------------------- */
void roq_close(roq_info *ri)
{
int i;
if(ri == NULL) return;
fclose(ri->fp);
for(i = 0; i < 2; i++)
{
if(ri->y[i] != NULL) free(ri->y[i]);
if(ri->u[i] != NULL) free(ri->u[i]);
if(ri->v[i] != NULL) free(ri->v[i]);
}
if(ri->buf != NULL) free(ri->buf);
free(ri);
}
/* -------------------------------------------------------------------------- */
int roq_read_frame(roq_info *ri)
{
FILE *fp = ri->fp;
unsigned int chunk_id = 0, chunk_arg = 0;
unsigned long chunk_size = 0;
int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1, vqid, bpos, xpos, ypos, xp, yp, x, y;
unsigned char *tp, *buf;
int frame_stats[2][4] = {{0},{0}};
roq_qcell *qcell;
fseek(fp, ri->vid_pos, SEEK_SET);
while(!feof(fp))
{
chunk_id = get_word(fp);
chunk_size = get_long(fp);
chunk_arg = get_word(fp);
if(feof(fp)) break;
if(chunk_id == RoQ_QUAD_VQ) break;
if(chunk_id == RoQ_QUAD_CODEBOOK)
{
if((nv1 = chunk_arg >> 8) == 0) nv1 = 256;
if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size) nv2 = 256;
for(i = 0; i < nv1; i++)
{
ri->cells[i].y0 = fgetc(fp);
ri->cells[i].y1 = fgetc(fp);
ri->cells[i].y2 = fgetc(fp);
ri->cells[i].y3 = fgetc(fp);
ri->cells[i].u = fgetc(fp);
ri->cells[i].v = fgetc(fp);
}
for(i = 0; i < nv2; i++)
for(j = 0; j < 4; j++) ri->qcells[i].idx[j] = fgetc(fp);
}
else fseek(fp, chunk_size, SEEK_CUR);
}
if(chunk_id != RoQ_QUAD_VQ)
{
ri->vid_pos = ftell(fp);
return 0;
}
ri->frame_num++;
if(ri->buf_size < chunk_size)
{
ri->buf_size *= 2;
free(ri->buf);
if((ri->buf = calloc(ri->buf_size, 1)) == NULL)
{
printf("Memory allocation error.\n");
return -1;
}
}
fread(ri->buf, chunk_size, 1, fp);
buf = ri->buf;
bpos = xpos = ypos = 0;
while(bpos < chunk_size)
{
for(yp = ypos; yp < ypos + 16; yp += 8)
for(xp = xpos; xp < xpos + 16; xp += 8)
{
if(vqflg_pos < 0)
{
vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
vqflg_pos = 7;
}
vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
frame_stats[0][vqid]++;
vqflg_pos--;
switch(vqid)
{
case RoQ_ID_MOT: break;
case RoQ_ID_FCC:
apply_motion_8x8(ri, xp, yp, buf[bpos++], chunk_arg >> 8, chunk_arg & 0xff);
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]);
break;
case RoQ_ID_CCC:
for(k = 0; k < 4; k++)
{
x = xp; y = yp;
if(k & 0x01) x += 4;
if(k & 0x02) y += 4;
if(vqflg_pos < 0)
{
vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
vqflg_pos = 7;
}
vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
frame_stats[1][vqid]++;
vqflg_pos--;
switch(vqid)
{
case RoQ_ID_MOT: break;
case RoQ_ID_FCC:
apply_motion_4x4(ri, x, y, buf[bpos++], chunk_arg >> 8, chunk_arg & 0xff);
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]);
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]);
bpos += 4;
break;
}
}
break;
default:
printf("Unknown vq code: %d\n", vqid);
}
}
xpos += 16;
if(xpos >= ri->width)
{
xpos -= ri->width;
ypos += 16;
}
if(ypos >= ri->height) break;
}
#if 0
frame_stats[0][3] = 0;
printf("<%d 0x%04x -> %d,%d>\n", ri->frame_num, chunk_arg, (char)(chunk_arg >> 8), (char)(chunk_arg & 0xff));
printf("for 08x08 CCC = %d, FCC = %d, MOT = %d, SLD = %d, PAT = 0\n", frame_stats[0][3], frame_stats[0][1], frame_stats[0][0], frame_stats[0][2]);
printf("for 04x04 CCC = %d, FCC = %d, MOT = %d, SLD = %d, PAT = 0\n", frame_stats[1][3], frame_stats[1][1], frame_stats[1][0], frame_stats[1][2]);
#endif
ri->vid_pos = ftell(fp);
if(ri->frame_num == 1)
{
memcpy(ri->y[1], ri->y[0], ri->width * ri->height);
memcpy(ri->u[1], ri->u[0], (ri->width * ri->height)/4);
memcpy(ri->v[1], ri->v[0], (ri->width * ri->height)/4);
}
else
{
tp = ri->y[0]; ri->y[0] = ri->y[1]; ri->y[1] = tp;
tp = ri->u[0]; ri->u[0] = ri->u[1]; ri->u[1] = tp;
tp = ri->v[0]; ri->v[0] = ri->v[1]; ri->v[1] = tp;
}
return 1;
}
/* -------------------------------------------------------------------------- */
int roq_read_audio(roq_info *ri)
{
FILE *fp = ri->fp;
unsigned int chunk_id = 0, chunk_arg = 0;
unsigned long chunk_size = 0;
int i, snd_left, snd_right;
fseek(fp, ri->aud_pos, SEEK_SET);
ri->audio_size = 0;
while(!feof(fp))
{
chunk_id = get_word(fp);
chunk_size = get_long(fp);
chunk_arg = get_word(fp);
if(feof(fp) || chunk_id == RoQ_SOUND_MONO || chunk_id == RoQ_SOUND_STEREO)
break;
fseek(fp, chunk_size, SEEK_CUR);
}
if(ri->audio_buf_size < chunk_size * 2)
{
if(ri->audio != NULL) free(ri->audio);
ri->audio_buf_size = chunk_size * 3;
if((ri->audio = calloc(ri->audio_buf_size, 1)) == NULL) return -1;
}
if(chunk_id == RoQ_SOUND_MONO)
{
ri->audio_size = chunk_size * 2;
snd_left = chunk_arg;
for(i = 0; i < chunk_size; i++)
{
snd_left += ri->snd_sqr_arr[fgetc(fp)];
ri->audio[i * 2] = snd_left & 0xff;
ri->audio[i * 2 + 1] = (snd_left & 0xff00) >> 8;
}
ri->aud_pos = ftell(fp);
return 1;
}
if(chunk_id == RoQ_SOUND_STEREO)
{
ri->audio_size = chunk_size * 2;
snd_left = (chunk_arg & 0xFF00);
snd_right = (chunk_arg & 0xFF) << 8;
for(i = 0; i < chunk_size; i += 2)
{
snd_left += ri->snd_sqr_arr[fgetc(fp)];
snd_right += ri->snd_sqr_arr[fgetc(fp)];
ri->audio[i * 2] = snd_left & 0xff;
ri->audio[i * 2 + 1] = (snd_left & 0xff00) >> 8;
ri->audio[i * 2 + 2] = snd_right & 0xff;
ri->audio[i * 2 + 3] = (snd_right & 0xff00) >> 8;
}
ri->aud_pos = ftell(fp);
return 1;
}
ri->aud_pos = ftell(fp);
return 0;
}
void roq_reset_stream (roq_info *ri)
{
ri->aud_pos = ri->vid_pos = ri->roq_start;
ri->frame_num = 0;
}
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