static int dvvideo_decode_init(AVCodecContext *avctx)
{
DVVideoDecodeContext *s = avctx->priv_data;
MpegEncContext s2;
static int done=0;
if (!done) {
int i;
done = 1;
/* NOTE: as a trick, we use the fact the no codes are unused
to accelerate the parsing of partial codes */
init_vlc(&dv_vlc, TEX_VLC_BITS, NB_DV_VLC,
dv_vlc_len, 1, 1, dv_vlc_bits, 2, 2);
dv_rl_vlc[0] = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
for(i = 0; i < dv_vlc.table_size; i++){
int code= dv_vlc.table[i][0];
int len = dv_vlc.table[i][1];
int level, run;
if(len<0){ //more bits needed
run= 0;
level= code;
} else if (code == (NB_DV_VLC - 1)) {
/* EOB */
run = 0;
level = 256;
} else {
run= dv_vlc_run[code] + 1;
level= dv_vlc_level[code];
}
dv_rl_vlc[0][i].len = len;
dv_rl_vlc[0][i].level = level;
dv_rl_vlc[0][i].run = run;
}
}
/* ugly way to get the idct & scantable */
/* XXX: fix it */
memset(&s2, 0, sizeof(MpegEncContext));
s2.avctx = avctx;
dsputil_init(&s2.dsp, avctx);
if (DCT_common_init(&s2) < 0)
return -1;
s->idct_put[0] = s2.dsp.idct_put;
memcpy(s->idct_permutation, s2.dsp.idct_permutation, 64);
memcpy(s->dv_zigzag[0], s2.intra_scantable.permutated, 64);
/* XXX: use MMX also for idct248 */
s->idct_put[1] = simple_idct248_put;
memcpy(s->dv_zigzag[1], dv_248_zigzag, 64);
/* XXX: do it only for constant case */
dv_build_unquantize_tables(s);
return 0;
}
static av_cold int dvvideo_init(AVCodecContext *avctx)
{
DVVideoContext *s = avctx->priv_data;
DSPContext dsp;
static int done=0;
int i, j;
if (!done) {
VLC dv_vlc;
uint16_t new_dv_vlc_bits[NB_DV_VLC*2];
uint8_t new_dv_vlc_len[NB_DV_VLC*2];
uint8_t new_dv_vlc_run[NB_DV_VLC*2];
int16_t new_dv_vlc_level[NB_DV_VLC*2];
done = 1;
/* dv_anchor lets each thread know its Id */
for (i=0; i<DV_ANCHOR_SIZE; i++)
dv_anchor[i] = (void*)(size_t)i;
/* it's faster to include sign bit in a generic VLC parsing scheme */
for (i=0, j=0; i<NB_DV_VLC; i++, j++) {
new_dv_vlc_bits[j] = dv_vlc_bits[i];
new_dv_vlc_len[j] = dv_vlc_len[i];
new_dv_vlc_run[j] = dv_vlc_run[i];
new_dv_vlc_level[j] = dv_vlc_level[i];
if (dv_vlc_level[i]) {
new_dv_vlc_bits[j] <<= 1;
new_dv_vlc_len[j]++;
j++;
new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1;
new_dv_vlc_len[j] = dv_vlc_len[i] + 1;
new_dv_vlc_run[j] = dv_vlc_run[i];
new_dv_vlc_level[j] = -dv_vlc_level[i];
}
}
/* NOTE: as a trick, we use the fact the no codes are unused
to accelerate the parsing of partial codes */
init_vlc(&dv_vlc, TEX_VLC_BITS, j,
new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
assert(dv_vlc.table_size == 1184);
for(i = 0; i < dv_vlc.table_size; i++){
int code= dv_vlc.table[i][0];
int len = dv_vlc.table[i][1];
int level, run;
if(len<0){ //more bits needed
run= 0;
level= code;
} else {
run= new_dv_vlc_run[code] + 1;
level= new_dv_vlc_level[code];
}
dv_rl_vlc[i].len = len;
dv_rl_vlc[i].level = level;
dv_rl_vlc[i].run = run;
}
free_vlc(&dv_vlc);
for (i = 0; i < NB_DV_VLC - 1; i++) {
if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
continue;
#ifdef DV_CODEC_TINY_TARGET
if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
continue;
#endif
if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
continue;
dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] <<
(!!dv_vlc_level[i]);
dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] +
(!!dv_vlc_level[i]);
}
for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
#ifdef DV_CODEC_TINY_TARGET
for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
if (dv_vlc_map[i][j].size == 0) {
dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
(dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
dv_vlc_map[0][j].size;
}
}
#else
for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
if (dv_vlc_map[i][j].size == 0) {
dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
(dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
dv_vlc_map[0][j].size;
}
dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
dv_vlc_map[i][j].vlc | 1;
dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
dv_vlc_map[i][j].size;
}
#endif
}
}
/* Generic DSP setup */
dsputil_init(&dsp, avctx);
s->get_pixels = dsp.get_pixels;
/* 88DCT setup */
s->fdct[0] = dsp.fdct;
s->idct_put[0] = dsp.idct_put;
for (i=0; i<64; i++)
s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
/* 248DCT setup */
s->fdct[1] = dsp.fdct248;
s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP
if(avctx->lowres){
for (i=0; i<64; i++){
int j= ff_zigzag248_direct[i];
s->dv_zigzag[1][i] = dsp.idct_permutation[(j&7) + (j&8)*4 + (j&48)/2];
}
}else
memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
/* XXX: do it only for constant case */
dv_build_unquantize_tables(s, dsp.idct_permutation);
avctx->coded_frame = &s->picture;
s->avctx= avctx;
return 0;
}