216
199
if (avctx->extradata_size < 30)
219
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size);
202
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
220
203
if (show_bits_long(&s->gb, 32) == AV_RL32("TTA1"))
223
206
skip_bits(&s->gb, 32);
224
// if (get_bits_long(&s->gb, 32) != av_bswap32(AV_RL32("TTA1"))) {
225
// av_log(s->avctx, AV_LOG_ERROR, "Missing magic\n");
229
s->flags = get_bits(&s->gb, 16);
230
if (s->flags != 1 && s->flags != 3)
232
av_log(s->avctx, AV_LOG_ERROR, "Invalid flags\n");
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s->format = get_bits(&s->gb, 16);
210
av_log(s->avctx, AV_LOG_ERROR, "Invalid format\n");
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s->is_float = (s->flags == FORMAT_FLOAT);
213
if (s->format == FORMAT_ENCRYPTED) {
214
av_log_missing_feature(s->avctx, "Encrypted TTA", 0);
215
return AVERROR(EINVAL);
236
217
avctx->channels = s->channels = get_bits(&s->gb, 16);
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218
avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
238
219
s->bps = (avctx->bits_per_coded_sample + 7) / 8;
239
220
avctx->sample_rate = get_bits_long(&s->gb, 32);
240
if(avctx->sample_rate > 1000000){ //prevent FRAME_TIME * avctx->sample_rate from overflowing and sanity check
241
av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
244
221
s->data_length = get_bits_long(&s->gb, 32);
245
222
skip_bits(&s->gb, 32); // CRC32 of header
249
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
250
av_log_ask_for_sample(s->avctx, "Unsupported sample format.\n");
253
else switch(s->bps) {
254
// case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
255
case 2: avctx->sample_fmt = AV_SAMPLE_FMT_S16; break;
256
// case 3: avctx->sample_fmt = AV_SAMPLE_FMT_S24; break;
257
case 4: avctx->sample_fmt = AV_SAMPLE_FMT_S32; break;
259
av_log_ask_for_sample(s->avctx,
260
"Invalid/unsupported sample format.\n");
264
// FIXME: horribly broken, but directly from reference source
265
#define FRAME_TIME 1.04489795918367346939
266
s->frame_length = (int)(FRAME_TIME * avctx->sample_rate);
224
if (s->channels == 0) {
225
av_log(s->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
226
return AVERROR_INVALIDDATA;
231
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
232
avctx->bits_per_raw_sample = 16;
235
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
236
avctx->bits_per_raw_sample = 24;
239
av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported sample format.\n");
240
return AVERROR_INVALIDDATA;
244
if (avctx->sample_rate > 0x7FFFFF) {
245
av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
246
return AVERROR(EINVAL);
248
s->frame_length = 256 * avctx->sample_rate / 245;
268
250
s->last_frame_length = s->data_length % s->frame_length;
269
251
s->total_frames = s->data_length / s->frame_length +
270
252
(s->last_frame_length ? 1 : 0);
272
av_log(s->avctx, AV_LOG_DEBUG, "flags: %x chans: %d bps: %d rate: %d block: %d\n",
273
s->flags, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
254
av_log(s->avctx, AV_LOG_DEBUG, "format: %d chans: %d bps: %d rate: %d block: %d\n",
255
s->format, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
274
256
avctx->block_align);
275
257
av_log(s->avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
276
258
s->data_length, s->frame_length, s->last_frame_length, s->total_frames);
288
s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
271
s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
272
if (!s->decode_buffer)
273
return AVERROR(ENOMEM);
289
275
s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
277
av_freep(&s->decode_buffer);
291
278
return AVERROR(ENOMEM);
293
281
av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\n");
285
avcodec_get_frame_defaults(&s->frame);
286
avctx->coded_frame = &s->frame;
300
static int tta_decode_frame(AVCodecContext *avctx,
301
void *data, int *data_size,
291
static int tta_decode_frame(AVCodecContext *avctx, void *data,
292
int *got_frame_ptr, AVPacket *avpkt)
304
294
const uint8_t *buf = avpkt->data;
305
295
int buf_size = avpkt->size;
306
296
TTAContext *s = avctx->priv_data;
298
int cur_chan = 0, framelen = s->frame_length;
309
301
init_get_bits(&s->gb, buf, buf_size*8);
311
int cur_chan = 0, framelen = s->frame_length;
314
if (*data_size < (framelen * s->channels * 2)) {
315
av_log(avctx, AV_LOG_ERROR, "Output buffer size is too small.\n");
305
if (!s->total_frames && s->last_frame_length)
306
framelen = s->last_frame_length;
308
/* get output buffer */
309
s->frame.nb_samples = framelen;
310
if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
311
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
315
// decode directly to output buffer for 24-bit sample format
317
s->decode_buffer = s->frame.data[0];
319
// init per channel states
320
for (i = 0; i < s->channels; i++) {
321
s->ch_ctx[i].predictor = 0;
322
ttafilter_init(&s->ch_ctx[i].filter, ttafilter_configs[s->bps-1][0], ttafilter_configs[s->bps-1][1]);
323
rice_init(&s->ch_ctx[i].rice, 10, 10);
326
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
327
int32_t *predictor = &s->ch_ctx[cur_chan].predictor;
328
TTAFilter *filter = &s->ch_ctx[cur_chan].filter;
329
TTARice *rice = &s->ch_ctx[cur_chan].rice;
330
uint32_t unary, depth, k;
333
unary = tta_get_unary(&s->gb);
344
if (get_bits_left(&s->gb) < k)
320
if (!s->total_frames && s->last_frame_length)
321
framelen = s->last_frame_length;
323
// init per channel states
324
for (i = 0; i < s->channels; i++) {
325
s->ch_ctx[i].predictor = 0;
326
ttafilter_init(&s->ch_ctx[i].filter, ttafilter_configs[s->bps-1][0], ttafilter_configs[s->bps-1][1]);
327
rice_init(&s->ch_ctx[i].rice, 10, 10);
330
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
331
int32_t *predictor = &s->ch_ctx[cur_chan].predictor;
332
TTAFilter *filter = &s->ch_ctx[cur_chan].filter;
333
TTARice *rice = &s->ch_ctx[cur_chan].rice;
334
uint32_t unary, depth, k;
337
unary = tta_get_unary(&s->gb);
348
if (get_bits_left(&s->gb) < k)
348
if (k > MIN_CACHE_BITS)
352
if (k > MIN_CACHE_BITS)
354
value = (unary << k) + get_bits(&s->gb, k);
358
// FIXME: copy paste from original
361
rice->sum1 += value - (rice->sum1 >> 4);
362
if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
364
else if(rice->sum1 > shift_16[rice->k1 + 1])
366
value += shift_1[rice->k0];
368
rice->sum0 += value - (rice->sum0 >> 4);
369
if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
371
else if(rice->sum0 > shift_16[rice->k0 + 1])
375
// extract coded value
350
value = (unary << k) + get_bits(&s->gb, k);
354
// FIXME: copy paste from original
357
rice->sum1 += value - (rice->sum1 >> 4);
358
if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
360
else if(rice->sum1 > shift_16[rice->k1 + 1])
362
value += shift_1[rice->k0];
364
rice->sum0 += value - (rice->sum0 >> 4);
365
if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
367
else if(rice->sum0 > shift_16[rice->k0 + 1])
371
// extract coded value
376
372
#define UNFOLD(x) (((x)&1) ? (++(x)>>1) : (-(x)>>1))
380
ttafilter_process(filter, p, 0);
382
// fixed order prediction
376
ttafilter_process(filter, p, 0);
378
// fixed order prediction
383
379
#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
385
case 1: *p += PRED(*predictor, 4); break;
387
case 3: *p += PRED(*predictor, 5); break;
388
case 4: *p += *predictor; break;
393
// extract 32bit float from last two int samples
394
if (s->is_float && ((p - data) & 1)) {
395
uint32_t neg = *p & 0x80000000;
396
uint32_t hi = *(p - 1);
397
uint32_t lo = abs(*p) - 1;
399
hi += (hi || lo) ? 0x3f80 : 0;
400
// SWAP16: swap all the 16 bits
401
*(p - 1) = (hi << 16) | SWAP16(lo) | neg;
405
/*if ((get_bits_count(&s->gb)+7)/8 > buf_size)
407
av_log(NULL, AV_LOG_INFO, "overread!!\n");
412
if (cur_chan < (s->channels-1))
415
// decorrelate in case of stereo integer
416
if (!s->is_float && (s->channels > 1)) {
418
for (*p += *r / 2; r > p - s->channels; r--)
425
if (get_bits_left(&s->gb) < 32)
427
skip_bits(&s->gb, 32); // frame crc
429
// convert to output buffer
432
uint16_t *samples = data;
433
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
434
// *samples++ = (unsigned char)*p;
435
// *samples++ = (unsigned char)(*p >> 8);
438
*data_size = (uint8_t *)samples - (uint8_t *)data;
442
av_log(s->avctx, AV_LOG_ERROR, "Error, only 16bit samples supported!\n");
446
// return get_bits_count(&s->gb)+7)/8;
381
case 1: *p += PRED(*predictor, 4); break;
383
case 3: *p += PRED(*predictor, 5); break;
384
case 4: *p += *predictor; break;
389
if (cur_chan < (s->channels-1))
392
// decorrelate in case of stereo integer
393
if (s->channels > 1) {
395
for (*p += *r / 2; r > p - s->channels; r--)
402
if (get_bits_left(&s->gb) < 32)
404
skip_bits(&s->gb, 32); // frame crc
406
// convert to output buffer
408
int16_t *samples = (int16_t *)s->frame.data[0];
409
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
412
// shift samples for 24-bit sample format
413
int32_t *samples = (int32_t *)s->frame.data[0];
414
for (i = 0; i < framelen * s->channels; i++)
416
// reset decode buffer
417
s->decode_buffer = NULL;
421
*(AVFrame *)data = s->frame;