1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
|
/*
* DVD Player plugin for VDR
*
* Copyright (C) 2001.2002 Andreas Schultz <aschultz@warp10.net>
*
* This code is distributed under the terms and conditions of the
* GNU GENERAL PUBLIC LICENSE. See the file COPYING for details.
*
*/
#include <stdio.h>
#include <memory.h>
#ifndef __QNXNTO__
#include <byteswap.h>
#elif defined(__QNXNTO__)
#include <gulliver.h>
#include <stdint.h>
#include <strings.h>
#ifdef WORDS_BIGENDIAN
#define bswap_16(x) ENDIAN_LE16(x)
#define bswap_32(x) ENDIAN_LE32(x)
#define bswap_64(x) ENDIAN_LE64(x)
#else
#define bswap_16(x) ENDIAN_BE16(x)
#define bswap_32(x) ENDIAN_BE32(x)
#define bswap_64(x) ENDIAN_BE64(x)
#endif
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "dvddev.h"
#include "setup-dvd.h"
#include "tools-dvd.h"
#include "player-dvd.h"
#include "ca52.h"
// #define A52DEBUG
#ifdef A52DEBUG
#warning A52DEBUG is defined
#define DEBUG_A52(format, args...) fprintf (stderr, format, ## args)
#else
#define DEBUG_A52(format, args...)
#endif
static const uint8_t burstHeader[4] = { 0xf8, 0x72, 0x4e, 0x1f };
A52decoder::A52decoder(cDvdPlayer &ThePlayer): player(ThePlayer)
{
syncMode = ptsCopy;
apts = 0;
state = a52_init (MM_ACCEL_DJBFFT);
// state = a52_init(MM_ACCEL_X86_MMXEXT);
blk_buf = (uchar *)malloc(25*1024);
blk_ptr = blk_buf;
blk_size = 0;
setup();
}
A52decoder::~A52decoder()
{
if(blk_buf) free(blk_buf) ; blk_buf=NULL;
}
void A52decoder::setup(void)
{
flags = A52_DOLBY;
level = DVDSetup.Gain;
bias = 384;
}
#define convert(x) x>0x43c07fff ? bswap_16(0x7fff) : x < 0x43bf8000 ? bswap_16(0x8000) : bswap_16(x - 0x43c00000);
#if 0
static inline int16_t bswap(int16_t i)
{
return bswap_16(i);
}
inline int16_t A52decoder::convert (int32_t i)
{
if (i > 0x43c07fff)
return bswap(32767);
else if (i < 0x43bf8000)
return bswap(-32768);
else
return bswap(i - 0x43c00000);
}
#endif
inline void A52decoder::float_to_int (float * _f, int16_t * s16, int flags)
{
int i;
int32_t * f = (int32_t *) _f;
switch (flags) {
case A52_MONO: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = s16[ic+1] = s16[ic+2] = s16[ic+3] = 0;
s16[ic+4] = convert (f[i]);
ic+=5;
}
break;
}
case A52_CHANNEL:
case A52_STEREO:
case A52_DOLBY: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i]);
s16[ic+1] = convert (f[i+256]);
ic +=2;
}
break;
}
case A52_3F: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i]);
s16[ic+1] = convert (f[i+512]);
s16[ic+2] = s16[ic+3] = 0;
s16[ic+4] = convert (f[i+256]);
ic +=5;
}
break;
}
case A52_2F2R: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i]);
s16[ic+1] = convert (f[i+256]);
s16[ic+2] = convert (f[i+512]);
s16[ic+3] = convert (f[i+768]);
ic +=4;
}
break;
}
case A52_3F2R: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i]);
s16[ic+1] = convert (f[i+256]);
s16[ic+2] = convert (f[i+512]);
s16[ic+3] = convert (f[i+768]);
s16[ic+4] = convert (f[i+1024]);
ic +=5;
}
break;
}
case A52_MONO | A52_LFE: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = s16[ic+1] = s16[ic+2] = s16[ic+3] = 0;
s16[ic+4] = convert (f[i+256]);
s16[ic+5] = convert (f[i]);
ic +=6;
}
break;
}
case A52_CHANNEL | A52_LFE:
case A52_STEREO | A52_LFE:
case A52_DOLBY | A52_LFE: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i+256]);
s16[ic+1] = convert (f[i+512]);
s16[ic+2] = s16[ic+3] = s16[ic+4] = 0;
s16[ic+5] = convert (f[i]);
ic +=6;
}
break;
}
case A52_3F | A52_LFE: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i+256]);
s16[ic+1] = convert (f[i+768]);
s16[ic+2] = s16[ic+3] = 0;
s16[ic+4] = convert (f[i+512]);
s16[ic+5] = convert (f[i]);
ic +=6;
}
break;
}
case A52_2F2R | A52_LFE: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i+256]);
s16[ic+1] = convert (f[i+512]);
s16[ic+2] = convert (f[i+768]);
s16[ic+3] = convert (f[i+1024]);
s16[ic+4] = 0;
s16[ic+5] = convert (f[i]);
ic +=6;
}
break;
}
case A52_3F2R | A52_LFE: {
int ic=0;
for (i = 0; i < 256; i++) {
s16[ic] = convert (f[i+256]);
s16[ic+1] = convert (f[i+768]);
s16[ic+2] = convert (f[i+1024]);
s16[ic+3] = convert (f[i+1280]);
s16[ic+4] = convert (f[i+512]);
s16[ic+5] = convert (f[i]);
ic +=6;
}
break;
}
}
}
// data=PCM samples, 16 bit, LSB first, 48kHz, stereo
void A52decoder::init_ipack(int p_size, uint32_t pktpts, uint8_t SubStreamId)
{
int header = pktpts ? 5 :0;
int length = 10 + header + p_size;
blk_ptr[0] = 0x00;
blk_ptr[1] = 0x00;
blk_ptr[2] = 0x01;
blk_ptr[3] = PRIVATE_STREAM1;
blk_ptr[4] = (length >> 8) & 0xff;
blk_ptr[5] = length & 0xff;
blk_ptr[6] = 0x84;
blk_ptr[7] = pktpts ? 0x80 : 0;
blk_ptr[8] = header;
blk_ptr += 9;
if (header) {
cPStream::toPTS(blk_ptr, pktpts);
}
blk_ptr += header;
/**
*
struct LPCMHeader { int id:8; // id
int frame_count:8; // number of frames
int access_ptr:16; // first acces unit pointer, i.e. start of audio frame
bool emphasis:1; // audio emphasis on-off
bool mute:1; // audio mute on-off
bool reserved:1; // reserved
int frame_number:5; // audio frame number
int quant_wlen:2; // quantization word length
int sample_freq:2; // audio sampling frequency (48khz=0, 96khz=1, 44,1khz=2, 32khz=3)
bool reserved2:1; // reserved
int chan_count:3; // number of audio channels - 1 (e.g. stereo = 1)
int dyn_range_ctrl:8; // dynamic range control (0x80 if off)
};
*
*/
blk_ptr[0] = aLPCM | SubStreamId; // substream ID
// other stuff (see DVB specs), may be ignored by driver
// but try to set it up correctly ..
blk_ptr[1] = 0x07; // number of frames
blk_ptr[2] = 0x00; // start of audio frame
blk_ptr[3] = 0x04; // start of audio frame
blk_ptr[4] = 0x0C; // emph, mute, res, frame_num
blk_ptr[5] = 0x01; // quantwlen, samplefreq, channels (48kHz, stereo)
blk_ptr[6] = 0x80; // dynam. range ctrl (off)
blk_ptr += 7;
blk_size += 16 + header;
}
int A52decoder::convertSample(int flags, a52_state_t * _state, uint32_t pktpts, uint8_t SubStreamId) {
int chans = -1;
sample_t * _samples = a52_samples(_state);
#ifdef LIBA52_DOUBLE
float samples[256 * 6];
int i;
for (i = 0; i < 256 * 6; i++)
samples[i] = _samples[i];
#else
float * samples = _samples;
#endif
flags &= A52_CHANNEL_MASK | A52_LFE;
if (flags & A52_LFE)
chans = 6;
else if (flags & 1) /* center channel */
chans = 5;
else switch (flags) {
case A52_2F2R:
chans = 4;
break;
case A52_CHANNEL:
case A52_STEREO:
case A52_DOLBY:
chans = 2;
break;
default:
return 1;
}
init_ipack((int) 256 * sizeof (int16_t) * chans, pktpts, SubStreamId);
float_to_int (samples, (int16_t *)blk_ptr, flags);
// push data to driver
blk_ptr += (int) 256 * sizeof (int16_t) * chans;
blk_size += (int) 256 * sizeof (int16_t) * chans;
return 0;
}
void A52decoder::clear()
{
DEBUG_A52("A52decoder::clear()\n");
blk_ptr = blk_buf;
blk_size = 0;
apts = 0;
a52asm.clear();
}
/* from a52a.pdf:
*
* The AC-3 audio access unit (AU) or presentation unit (PU)
* is an AC-3 sync frame. The AC-3 sync frame contains 1 536 audio
* samples. The duration of an AC-3 access (or presentation) unit
* is 32 ms for audio sampled at 48 kHz, approximately 34.83 ms for
* audio sampled at 44.1 kHz, and 48 ms for audio sampled at 32 kHz.
*
* in 90kHz pts cycles:
* 48kHz = 2880
* 44.1kHz = 3134.69
* 32kHz = 4320
*
* for now, lets assume we always have 48kHz!!
*/
void A52decoder::decode(uint8_t * start, int size, uint32_t pktpts, uint8_t SubStreamId)
{
int bit_rate;
//do we enter with an empty buffer
bool sendPTS = a52asm.used() < 40;
DEBUG_A52("pts: %d %8d %8d, %8d\n",
sendPTS, apts, pktpts, apts - pktpts);
if (a52asm.used() == 0 || apts == 0 ||
apts > (pktpts + 2880) || (apts + 5760) < pktpts) {
DEBUG_A52("reseting Audio PTS\n");
apts = pktpts;
}
blk_ptr = blk_buf;
blk_size = 0;
while (size) {
int res = a52asm.put(start, size, pktpts);
start += res;
size -= res;
if ( res==0 ) {
clear();
break;
}
if (a52asm.ready()) {
int length;
A52frame *frm = a52asm.get();
if (!frm)
goto error;
length = a52_syncinfo (frm->frame,
&flags, &sample_rate, &bit_rate);
if (!length) {
delete frm;
continue;
}
if (syncMode == ptsGenerate) {
pktpts = apts;
sendPTS = true;
}
int i;
setup();
flags |= A52_ADJUST_LEVEL;
if (a52_frame (state, frm->frame, &flags, &level, bias))
goto error;
if (!DVDSetup.AC3dynrng)
a52_dynrng (state, NULL, NULL);
for (i = 0; i < 6; i++) {
if (a52_block (state))
goto error;
if (sendPTS) {
player.seenAPTS(pktpts);
DEBUG_A52("sending PTS\n");
}
if (convertSample(flags, state, sendPTS ? pktpts : 0, SubStreamId))
goto error;
pktpts = 0;
sendPTS = false;
}
apts += 2880;
delete frm;
continue;
error:
DEBUG_A52("error\n");
sendPTS = false;
apts = 0;
if (frm)
delete frm;
}
}
if (blk_size > 0)
player.cbPlayAudio(blk_buf, blk_size);
}
A52frame::A52frame(int datasize, int frmsize, uint32_t apts)
{
frame = new uint8_t[datasize+2];
frame[0] = 0x0b;
frame[1] = 0x77;
size = frmsize;
pos = 2;
pts = apts;
}
A52frame::~A52frame()
{
delete[] frame;
}
A52assembler::A52assembler()
{
curfrm = NULL;
syncword = 0xffff;
}
A52assembler::~A52assembler()
{
if (curfrm)
delete curfrm;
}
void A52assembler::clear(void)
{
if (curfrm)
delete curfrm;
curfrm = NULL;
syncword = 0xffff;
}
A52frame *A52assembler::get(void)
{
A52frame *frm = curfrm;
curfrm = NULL;
syncword = 0xffff;
return frm;
}
int A52assembler::used(void)
{
if (curfrm) return curfrm->pos;
return 0;
}
bool A52assembler::ready(void)
{
return curfrm && curfrm->pos == curfrm->size;
};
#ifndef WORDS_BIGENDIAN
# define char2short(a,b) ((((b) << 8) & 0xffff) ^ ((a) & 0xffff))
# define shorts(a) (a)
#else
# define char2short(a,b) ((((a) << 8) & 0xffff) ^ ((b) & 0xffff))
# define shorts(a) char2short(((a) & 0xff),(((a) >> 8) & 0xff));
#endif
int A52assembler::put(uint8_t *buf, int len, uint32_t pts)
{
if (ready())
return 0;
uint8_t *data = buf;
uint8_t *end = data + len;
while(syncword != char2short(0x77, 0x0b)) {
if (data >= end) {
DEBUG_A52("skipping %d bytes without finding anything\n", data - buf);
return data - buf;
}
syncword = (syncword << 8) | *data++;
}
int frmsize = 0;
if (!curfrm) {
int datasize = 1920;
if (end - data > 3)
datasize = frmsize = parse_syncinfo(data);
curfrm = new A52frame(datasize, frmsize, pts);
}
if (curfrm->size == 0) {
if (curfrm->pos < 6) {
frmsize = 6 - curfrm->pos;
} else {
curfrm->size = parse_syncinfo(curfrm->frame+2);
frmsize = curfrm->size - curfrm->pos;
}
} else
frmsize = curfrm->size - curfrm->pos;
if (frmsize > end - data)
frmsize = end - data;
if (frmsize<0) return 0;
memcpy(curfrm->frame + curfrm->pos, data, frmsize);
curfrm->pos += frmsize;
return data + frmsize - buf;
}
// Parse a syncinfo structure, minus the sync word
int A52assembler::parse_syncinfo(uint8_t *data)
{
static int rate[] = { 32, 40, 48, 56, 64, 80, 96, 112,
128, 160, 192, 224, 256, 320, 384, 448,
512, 576, 640};
int frmsizecod;
int bitrate;
if (data[3] >= 0x60) /* bsid >= 12 */
return 0;
frmsizecod = data[2] & 63;
if (frmsizecod >= 38)
return 0;
bitrate = rate [frmsizecod >> 1];
switch (data[2] & 0xc0) {
case 0:
return 4 * bitrate;
case 0x40:
return 2 * (320 * bitrate / 147 + (frmsizecod & 1));
case 0x80:
return 6 * bitrate;
default:
return 0;
}
}
|