35 #define MAX_CHANNELS 8
36 #define MAX_BLOCKSIZE 65535
38 #define OUT_BUFFER_SIZE 16384
42 #define WAVE_FORMAT_PCM 0x0001
44 #define DEFAULT_BLOCK_SIZE 256
50 #define BITSHIFTSIZE 2
59 #define V2LPCQOFFSET (1 << LPCQUANT)
67 #define FN_BLOCKSIZE 5
76 #define VERBATIM_CKSIZE_SIZE 5
77 #define VERBATIM_BYTE_SIZE 8
78 #define CANONICAL_HEADER_SIZE 44
129 for (chan=0; chan<s->
channels; chan++) {
130 if(
FFMAX(1, s->
nmean) >= UINT_MAX/
sizeof(int32_t)){
142 s->
offset[chan] = tmp_ptr;
149 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;
211 if (bytestream_get_le32(&header) !=
MKTAG(
'R',
'I',
'F',
'F')) {
218 if (bytestream_get_le32(&header) !=
MKTAG(
'W',
'A',
'V',
'E')) {
223 while (bytestream_get_le32(&header) !=
MKTAG(
'f',
'm',
't',
' ')) {
224 len = bytestream_get_le32(&header);
227 len = bytestream_get_le32(&header);
234 wave_format = bytestream_get_le16(&header);
236 switch (wave_format) {
266 for (i=0; i<blocksize; i++)
267 for (chan=0; chan < nchan; chan++)
268 *samples++ = av_clip_int16(buffer[chan][i]);
278 int residual_size, int32_t coffset)
280 int pred_order, sum, qshift, init_sum, i, j;
286 if (pred_order > s->
nwrap) {
291 for (i=0; i<pred_order; i++)
298 pred_order = command;
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];
318 if (command ==
FN_QLPC && coffset)
320 s->
decoded[channel][i] += coffset;
350 int skip_bytes, blocksize;
364 for (i=0; i<skip_bytes; i++) {
405 int *got_frame_ptr,
AVPacket *avpkt)
407 const uint8_t *buf = avpkt->
data;
408 int buf_size = avpkt->
size;
410 int i, input_buf_size = 0;
429 input_buf_size= buf_size;
443 if (buf_size < s->max_framesize && avpkt->
data) {
445 return input_buf_size;
504 "block size: %d\n", blocksize);
520 int residual_size = 0;
534 coffset = s->
offset[channel][0];
538 sum += s->
offset[channel][i];
539 coffset = sum / s->
nmean;
569 for (i=-s->
nwrap; i<0; i++)
609 return input_buf_size;