36 #define MAX_CHANNELS 8
37 #define MAX_BLOCKSIZE 65535
39 #define OUT_BUFFER_SIZE 16384
43 #define WAVE_FORMAT_PCM 0x0001
45 #define DEFAULT_BLOCK_SIZE 256
51 #define BITSHIFTSIZE 2
60 #define V2LPCQOFFSET (1 << LPCQUANT)
68 #define FN_BLOCKSIZE 5
77 #define VERBATIM_CKSIZE_SIZE 5
78 #define VERBATIM_BYTE_SIZE 8
79 #define CANONICAL_HEADER_SIZE 44
130 for (chan = 0; chan < s->
channels; chan++) {
138 "s->blocksize + s->nwrap too large\n");
146 s->
offset[chan] = tmp_ptr;
153 for (i = 0; i < s->
nwrap; i++)
198 for (chan = 0; chan < s->
channels; chan++)
199 for (i = 0; i < nblock; i++)
200 s->
offset[chan][i] = mean;
213 if (bytestream2_get_le32(&gb) !=
MKTAG(
'R',
'I',
'F',
'F')) {
220 if (bytestream2_get_le32(&gb) !=
MKTAG(
'W',
'A',
'V',
'E')) {
225 while (bytestream2_get_le32(&gb) !=
MKTAG(
'f',
'm',
't',
' ')) {
226 len = bytestream2_get_le32(&gb);
233 len = bytestream2_get_le32(&gb);
240 wave_format = bytestream2_get_le16(&gb);
242 switch (wave_format) {
272 for (ch = 0; ch < nchan; ch++) {
274 int16_t *out = samples[ch];
275 for (i = 0; i < blocksize; i++)
276 out[i] = av_clip_int16(in[i]);
288 int residual_size,
int32_t coffset)
290 int pred_order, sum, qshift, init_sum, i, j;
296 if (pred_order > s->
nwrap) {
302 for (i = 0; i < pred_order; i++)
309 pred_order = command;
320 if (command ==
FN_QLPC && coffset)
321 for (i = -pred_order; i < 0; i++)
322 s->
decoded[channel][i] -= coffset;
328 for (j = 0; j < pred_order; j++)
329 sum += coeffs[j] * s->
decoded[channel][i - j - 1];
335 if (command ==
FN_QLPC && coffset)
337 s->
decoded[channel][i] += coffset;
378 "invalid or unsupported block size: %d\n",
388 for (i = 0; i < skip_bytes; i++)
404 "missing verbatim section at beginning of stream\n");
431 int *got_frame_ptr,
AVPacket *avpkt)
434 int buf_size = avpkt->
size;
436 int i, input_buf_size = 0;
455 input_buf_size = buf_size;
472 if (buf_size < s->max_framesize && avpkt->
data) {
474 return input_buf_size;
528 "Increasing block size is not supported\n");
533 "block size: %d\n", blocksize);
549 int residual_size = 0;
564 coffset = s->
offset[channel][0];
568 sum += s->
offset[channel][i];
569 coffset = sum / s->
nmean;
580 residual_size, coffset)) < 0)
600 for (i = -s->
nwrap; i < 0; i++)
640 return input_buf_size;