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fteqw/engine/client/roq_read.c

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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 "quakedef.h"
#if defined(HAVE_MEDIA_DECODER) && defined(Q3CLIENT)
static int VFS_GETC(vfsfile_t *fp)
{
unsigned char c;
VFS_READ(fp, &c, 1);
return c;
}
//#include <stdio.h>
//#include <stdlib.h>
//#include <string.h>
#include "roq.h"
//#define DBUG 1
#define FAST
/* -------------------------------------------------------------------------- */
static unsigned int get_word(vfsfile_t *fp)
{
unsigned int ret;
ret = ((VFS_GETC(fp)) & 0xff);
ret |= ((VFS_GETC(fp)) & 0xff) << 8;
return(ret);
}
/* -------------------------------------------------------------------------- */
static unsigned long get_long(vfsfile_t *fp)
{
unsigned long ret;
ret = ((VFS_GETC(fp)) & 0xff);
ret |= ((VFS_GETC(fp)) & 0xff) << 8;
ret |= ((VFS_GETC(fp)) & 0xff) << 16;
ret |= ((VFS_GETC(fp)) & 0xff) << 24;
return(ret);
}
/* -------------------------------------------------------------------------- */
static int roq_parse_file(vfsfile_t *fp, roq_info *ri)
{
unsigned int head1, head3, chunk_id;//, chunk_arg;
long head2, chunk_size;
qofs_t fpos;
#ifndef FAST
int max_frame;
#endif
#ifndef FAST
ri->num_audio_bytes = ri->num_frames = max_frame = 0;
ri->audio_channels = 0;
ri->frame_offset = NULL;
#endif
ri->buf_size = 0;
head1 = get_word(fp);
head2 = get_long(fp);
head3 = get_word(fp);
if(head1 != 0x1084 && head2 != 0xffffffff && head3 != 0x1e)
{
return 1;
}
ri->roq_start = fpos = VFS_TELL(fp);
while(fpos+8 <= ri->maxpos)
{
#if DBUG > 20
Con_Printf("---------------------------------------------------------------------------\n");
#endif
VFS_SEEK(fp, fpos);
chunk_id = get_word(fp);
chunk_size = get_long(fp);
/*chunk_arg =*/ get_word(fp);
fpos += 8 + chunk_size;
if (chunk_size == 0xffffffff || fpos > ri->maxpos) //FIXME: THIS SHOULD NOT HAPPEN
break;
if (chunk_size > ri->buf_size)
ri->buf_size = chunk_size;
#if DBUG > 20
Con_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);
#ifdef FAST
return 0; //we have all the data we need now. We always find a sound chunk first, or none at all.
#endif
}
#ifndef FAST
else if(chunk_id == RoQ_QUAD_VQ)
{
ri->num_frames++;
if(ri->num_frames > max_frame)
{
max_frame += 5000;
if((ri->frame_offset = BZ_Realloc(ri->frame_offset, sizeof(long) * max_frame)) == NULL)
return 1;
}
ri->frame_offset[ri->num_frames] = fpos;
}
}
#endif
else 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;
#ifndef FAST
ri->num_audio_bytes += chunk_size;
#endif
}
}
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)
{
vfsfile_t *fp;
roq_info *ri;
int i;
if((fp = FS_OpenVFS(fname, "rb", FS_GAME)) == NULL)
{
if((fp = FS_OpenVFS(va("video/%s", fname), "rb", FS_GAME)) == NULL) //for q3 compat
return NULL;
}
if((ri = BZF_Malloc(sizeof(roq_info))) == NULL)
{
Con_Printf("Error allocating memory.\n");
return NULL;
}
memset(ri, 0, sizeof(roq_info));
ri->maxpos = VFS_TELL(fp)+VFS_GETLEN(fp);//no adds/subracts for fileoffset here
ri->fp = fp;
if(roq_parse_file(fp, ri))
return NULL;
#ifndef FAST
ri->stream_length = (ri->num_frames * 1000)/30;
#endif
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] = BZF_Malloc(ri->width * ri->height)) == NULL ||
(ri->u[i] = BZF_Malloc((ri->width * ri->height)/4)) == NULL ||
(ri->v[i] = BZF_Malloc((ri->width * ri->height)/4)) == NULL)
{
Con_Printf("Memory allocation error.\n");
return NULL;
}
}
ri->buf_size *= 2;
if((ri->buf = BZF_Malloc(ri->buf_size)) == NULL)
{
Con_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;
return ri;
}
//reset enough that we'll start decoding from the start next time we try to read a frame.
void roq_rewind(roq_info *ri)
{
ri->frame_num = 0;
ri->aud_pos = ri->vid_pos = ri->roq_start;
}
/* -------------------------------------------------------------------------- */
void roq_close(roq_info *ri)
{
int i;
if(ri == NULL)
return;
VFS_CLOSE(ri->fp);
for(i = 0; i < 2; i++)
{
if(ri->y[i] != NULL)
BZ_Free(ri->y[i]);
if(ri->u[i] != NULL)
BZ_Free(ri->u[i]);
if(ri->v[i] != NULL)
BZ_Free(ri->v[i]);
}
if(ri->buf != NULL)
BZ_Free(ri->buf);
if (ri->audio)
BZ_Free(ri->audio);
BZ_Free(ri);
}
/* -------------------------------------------------------------------------- */
int roq_read_frame(roq_info *ri)
{
vfsfile_t *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;
qofs_t fpos = ri->vid_pos;
VFS_SEEK(fp, fpos);
while(fpos+8 < ri->maxpos)
{
chunk_id = get_word(fp);
chunk_size = get_long(fp);
chunk_arg = get_word(fp);
fpos += 8+chunk_size;
if (chunk_size == 0xffffffff || fpos > ri->maxpos)
return -1;
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;
VFS_READ(fp, ri->cells, nv1 * sizeof(roq_cell));
for(i = 0; i < nv2; i++)
for(j = 0; j < 4; j++) ri->qcells[i].idx[j] = VFS_GETC(fp);
}
else
VFS_SEEK(fp, fpos);
}
if(chunk_id != RoQ_QUAD_VQ)
{
ri->vid_pos = fpos;
return 0;
}
ri->frame_num++;
if(ri->buf_size < chunk_size)
{
ri->buf_size *= 2;
if (ri->buf_size < chunk_size) //double wasn't enough
ri->buf_size = chunk_size;
BZ_Free(ri->buf);
if((ri->buf = BZ_Malloc(ri->buf_size)) == NULL)
{
Con_Printf("Memory allocation error.\n");
return -1;
}
}
VFS_READ(fp, ri->buf, chunk_size);
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++], (char)(chunk_arg >> 8), (char)(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++], (char)(chunk_arg >> 8), (char)(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:
Con_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;
Con_Printf("<%d 0x%04x -> %d,%d>\n", ri->frame_num, chunk_arg, (char)(chunk_arg >> 8), (char)(chunk_arg & 0xff));
Con_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]);
Con_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 = fpos;
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)
{
vfsfile_t *fp = ri->fp;
unsigned int chunk_id = 0, chunk_arg = 0;
unsigned long chunk_size = 0;
int i, snd_left, snd_right;
long fpos;
fpos = ri->aud_pos;
ri->audio_size = 0;
for(;;)
{
VFS_SEEK(fp, fpos);
if(fpos >= ri->maxpos)
return -1;
chunk_id = get_word(fp);
chunk_size = get_long(fp);
chunk_arg = get_word(fp);
fpos += 8+chunk_size;
if (chunk_size == 0xffffffff || fpos > ri->maxpos)
return -1;
if (chunk_id == RoQ_SOUND_MONO || chunk_id == RoQ_SOUND_STEREO)
break;
}
if(ri->audio_buf_size < chunk_size*2)
{
if(ri->audio != NULL) BZ_Free(ri->audio);
ri->audio=NULL;
ri->audio_buf_size = chunk_size * 3;
if (ri->audio_buf_size <= 0)
return -1;
if((ri->audio = BZ_Malloc(ri->audio_buf_size)) == NULL) return -1;
}
if (ri->audio_buf_size < 0)
return -1;
if(chunk_id == RoQ_SOUND_MONO)
{
ri->audio_size = chunk_size;
snd_left = chunk_arg;
for(i = 0; i < chunk_size; i++)
{
snd_left += (int)ri->snd_sqr_arr[(unsigned)VFS_GETC(fp)];
*(short *)&ri->audio[i * 2] = snd_left;
}
ri->aud_pos = fpos;
return chunk_size;
}
if(chunk_id == RoQ_SOUND_STEREO)
{
ri->audio_size = chunk_size;
snd_left = (chunk_arg & 0xFF00);
snd_right = (chunk_arg & 0xFF) << 8;
for(i = 0; i < chunk_size; i += 2)
{
snd_left += (int)ri->snd_sqr_arr[(unsigned)VFS_GETC(fp)];
snd_right += (int)ri->snd_sqr_arr[(unsigned)VFS_GETC(fp)];
*(short *)&ri->audio[i * 2] = snd_left & 0xffff;
*(short *)&ri->audio[i * 2 + 2] = snd_right & 0xffff;
}
ri->aud_pos = fpos;
return chunk_size;
}
ri->aud_pos = fpos;
return 0;
}
#endif
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