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]);
287 int residual_size,
int32_t coffset)
289 int pred_order, sum, qshift, init_sum, i, j;
295 if (pred_order > s->
nwrap) {
301 for (i = 0; i < pred_order; i++)
308 pred_order = command;
314 if (command ==
FN_QLPC && coffset)
315 for (i = -pred_order; i < 0; i++)
316 s->
decoded[channel][i] -= coffset;
322 for (j = 0; j < pred_order; j++)
323 sum += coeffs[j] * s->
decoded[channel][i - j - 1];
329 if (command ==
FN_QLPC && coffset)
331 s->
decoded[channel][i] += coffset;
372 "invalid or unsupported block size: %d\n",
382 for (i = 0; i < skip_bytes; i++)
398 "missing verbatim section at beginning of stream\n");
425 int *got_frame_ptr,
AVPacket *avpkt)
428 int buf_size = avpkt->
size;
430 int i, input_buf_size = 0;
449 input_buf_size = buf_size;
466 if (buf_size < s->max_framesize && avpkt->
data) {
468 return input_buf_size;
522 "Increasing block size is not supported\n");
527 "block size: %d\n", blocksize);
543 int residual_size = 0;
558 coffset = s->
offset[channel][0];
562 sum += s->
offset[channel][i];
563 coffset = sum / s->
nmean;
574 residual_size, coffset)) < 0)
594 for (i = -s->
nwrap; i < 0; i++)
634 return input_buf_size;