static void dv_init_weight_tables(DVVideoContext *ctx, const AVDVProfile *d)
{
int j, i, c, s;
uint32_t *factor1 = &ctx->idct_factor[0],
*factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816];
if (DV_PROFILE_IS_HD(d)) {
/* quantization quanta by QNO for DV100 */
static const uint8_t dv100_qstep[16] = {
1, /* QNO = 0 and 1 both have no quantization */
1,
2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
};
const uint16_t *iweight1, *iweight2;
if (d->height == 720) {
iweight1 = &dv_iweight_720_y[0];
iweight2 = &dv_iweight_720_c[0];
} else {
iweight1 = &dv_iweight_1080_y[0];
iweight2 = &dv_iweight_1080_c[0];
}
for (c = 0; c < 4; c++) {
for (s = 0; s < 16; s++) {
for (i = 0; i < 64; i++) {
*factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
*factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
}
}
}
} else {
static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
const uint16_t *iweight1 = &dv_iweight_88[0];
for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) {
for (s = 0; s < 22; s++) {
for (i = c = 0; c < 4; c++) {
for (; i < dv_quant_areas[c]; i++) {
*factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1);
*factor2++ = (*factor1++) << 1;
}
}
}
}
}
}
static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t *buf, int seq)
{
int time_code;
buf[0] = (uint8_t)pack_id;
switch (pack_id) {
case dv_timecode:
time_code = c->frames + c->timecode_start;
/*
* LTC drop-frame frame counter drops two frames (0 and 1) every
* minute, unless it is exactly divisible by 10
*/
if (c->timecode_drop_frame)
time_code = ff_framenum_to_drop_timecode(time_code, c->sys->ltc_divisor);
buf[1] = (0 << 7) | /* Color fame: 0 - unsync; 1 - sync mode */
/* Drop frame timecode: 0 - nondrop; 1 - drop */
(c->timecode_drop_frame << 6) |
(((time_code % c->sys->ltc_divisor) / 10) << 4) | /* Tens of frames */
((time_code % c->sys->ltc_divisor) % 10); /* Units of frames */
buf[2] = (1 << 7) | /* Biphase mark polarity correction: 0 - even; 1 - odd */
((((time_code / c->sys->ltc_divisor) % 60) / 10) << 4) | /* Tens of seconds */
(((time_code / c->sys->ltc_divisor) % 60) % 10); /* Units of seconds */
buf[3] = (1 << 7) | /* Binary group flag BGF0 */
((((time_code / (c->sys->ltc_divisor * 60)) % 60) / 10) << 4) | /* Tens of minutes */
(((time_code / (c->sys->ltc_divisor * 60)) % 60) % 10); /* Units of minutes */
buf[4] = (1 << 7) | /* Binary group flag BGF2 */
(1 << 6) | /* Binary group flag BGF1 */
((((time_code / (c->sys->ltc_divisor * 3600) % 24)) / 10) << 4) | /* Tens of hours */
(((time_code / (c->sys->ltc_divisor * 3600) % 24)) % 10); /* Units of hours */
break;
case dv_audio_source: /* AAUX source pack */
buf[1] = (1 << 7) | /* locked mode -- SMPTE only supports locked mode */
(1 << 6) | /* reserved -- always 1 */
(dv_audio_frame_size(c->sys, c->frames) -
c->sys->audio_min_samples[0]);
/* # of samples */
buf[2] = (0 << 7) | /* multi-stereo */
(0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
(0 << 4) | /* pair bit: 0 -- one pair of channels */
(seq >= c->sys->difseg_size/2); /* audio mode (1st or 2nd channel) */
buf[3] = (1 << 7) | /* res */
(1 << 6) | /* multi-language flag */
(c->sys->dsf << 5) | /* system: 60fields/50fields */
(DV_PROFILE_IS_HD(c->sys) ? 0x3 : c->sys->video_stype ? 2 : 0); /* stype */
buf[4] = (1 << 7) | /* emphasis: 1 -- off */
(0 << 6) | /* emphasis time constant: 0 -- reserved */
(0 << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
break;
case dv_audio_control:
buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
(1 << 4) | /* input source: 1 -- digital input */
(3 << 2) | /* compression: 3 -- no information */
0; /* misc. info/SMPTE emphasis off */
buf[2] = (1 << 7) | /* recording start point: 1 -- no */
(1 << 6) | /* recording end point: 1 -- no */
(1 << 3) | /* recording mode: 1 -- original */
7;
buf[3] = (1 << 7) | /* direction: 1 -- forward */
(c->sys->pix_fmt == PIX_FMT_YUV420P ? 0x20 : /* speed */
c->sys->ltc_divisor * 4);
buf[4] = (1 << 7) | /* reserved -- always 1 */
0x7f; /* genre category */
break;
default:
buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
}
return 5;
}
