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
64 #define V2LPCQOFFSET (1 << LPCQUANT)
72 #define FN_BLOCKSIZE 5
81 #define VERBATIM_CKSIZE_SIZE 5
82 #define VERBATIM_BYTE_SIZE 8
83 #define CANONICAL_HEADER_SIZE 44
127 for (chan = 0; chan < s->
channels; chan++) {
134 "s->blocksize + s->nwrap too large\n");
146 for (i = 0; i < s->
nwrap; i++)
193 for (chan = 0; chan < s->
channels; chan++)
194 for (i = 0; i < nblock; i++)
195 s->
offset[chan][i] = mean;
208 if (bytestream2_get_le32(&gb) !=
MKTAG(
'R',
'I',
'F',
'F')) {
215 if (bytestream2_get_le32(&gb) !=
MKTAG(
'W',
'A',
'V',
'E')) {
220 while (bytestream2_get_le32(&gb) !=
MKTAG(
'f',
'm',
't',
' ')) {
221 len = bytestream2_get_le32(&gb);
228 len = bytestream2_get_le32(&gb);
235 wave_format = bytestream2_get_le16(&gb);
237 switch (wave_format) {
249 bps = bytestream2_get_le16(&gb);
252 if (bps != 16 && bps != 8) {
272 int residual_size,
int32_t coffset)
274 int pred_order, sum, qshift, init_sum, i, j;
280 if ((
unsigned)pred_order > s->
nwrap) {
286 for (i = 0; i < pred_order; i++)
304 if (command ==
FN_QLPC && coffset)
305 for (i = -pred_order; i < 0; i++)
306 s->
decoded[channel][i] -= coffset;
312 for (j = 0; j < pred_order; j++)
313 sum += coeffs[j] * s->
decoded[channel][i - j - 1];
319 if (command ==
FN_QLPC && coffset)
321 s->
decoded[channel][i] += coffset;
362 "invalid or unsupported block size: %d\n",
393 "missing verbatim section at beginning of stream\n");
420 int *got_frame_ptr,
AVPacket *avpkt)
424 int buf_size = avpkt->
size;
426 int i, input_buf_size = 0;
446 input_buf_size = buf_size;
463 if (buf_size < s->max_framesize && avpkt->
data) {
465 return input_buf_size;
526 "Increasing block size is not supported\n");
531 "block size: %d\n", blocksize);
547 int residual_size = 0;
562 coffset = s->
offset[channel][0];
566 sum += s->
offset[channel][i];
567 coffset = sum / s->
nmean;
578 residual_size, coffset)) < 0)
598 for (i = -s->
nwrap; i < 0; i++)
609 int16_t *samples_s16;
617 for (chan = 0; chan < s->
channels; chan++) {
623 *samples_u8++ = av_clip_uint8(s->
decoded[chan][i]);
627 *samples_s16++ = av_clip_int16(s->
decoded[chan][i]);
652 return input_buf_size;