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)) {
137 "s->blocksize + s->nwrap too large\n");
145 s->
offset[chan] = tmp_ptr;
152 for (i = 0; i < s->
nwrap; i++)
197 for (chan = 0; chan < s->
channels; chan++)
198 for (i = 0; i < nblock; i++)
199 s->
offset[chan][i] = mean;
209 if (bytestream_get_le32(&header) !=
MKTAG(
'R',
'I',
'F',
'F')) {
216 if (bytestream_get_le32(&header) !=
MKTAG(
'W',
'A',
'V',
'E')) {
221 while (bytestream_get_le32(&header) !=
MKTAG(
'f',
'm',
't',
' ')) {
222 len = bytestream_get_le32(&header);
225 len = bytestream_get_le32(&header);
232 wave_format = bytestream_get_le16(&header);
234 switch (wave_format) {
264 for (i=0; i<blocksize; i++)
265 for (chan=0; chan < nchan; chan++)
266 *samples++ = av_clip_int16(buffer[chan][i]);
276 int residual_size, int32_t coffset)
278 int pred_order, sum, qshift, init_sum, i, j;
284 if (pred_order > s->
nwrap) {
290 for (i = 0; i < pred_order; i++)
297 pred_order = command;
303 if (command ==
FN_QLPC && coffset)
304 for (i = -pred_order; i < 0; i++)
305 s->
decoded[channel][i] -= coffset;
311 for (j = 0; j < pred_order; j++)
312 sum += coeffs[j] * s->
decoded[channel][i - j - 1];
318 if (command ==
FN_QLPC && coffset)
320 s->
decoded[channel][i] += coffset;
361 "invalid or unsupported block size: %d\n",
371 for (i = 0; i < skip_bytes; i++)
387 "missing verbatim section at beginning of stream\n");
414 int *got_frame_ptr,
AVPacket *avpkt)
416 const uint8_t *buf = avpkt->
data;
417 int buf_size = avpkt->
size;
419 int i, input_buf_size = 0;
438 input_buf_size = buf_size;
455 if (buf_size < s->max_framesize && avpkt->
data) {
457 return input_buf_size;
511 "Increasing block size is not supported\n");
516 "block size: %d\n", blocksize);
532 int residual_size = 0;
546 coffset = s->
offset[channel][0];
550 sum += s->
offset[channel][i];
551 coffset = sum / s->
nmean;
562 residual_size, coffset)) < 0)
582 for (i = -s->
nwrap; i < 0; i++)
622 return input_buf_size;