FreeCalypso > hg > vband-misc

annotate pcma2efr/gen160.c @ 34:307fe06fabec

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
dhf: generate EFR hex DHF in C form
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 14 May 2024 03:36:31 +0000
parents 4f47447fd17f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
28
4f47447fd17f pcma2efr: starting with DHF check
Mychaela Falconia <falcon@freecalypso.org>
parents: 22
diff changeset
2 * The code in this module generates 160 versions of linearized seqsynca,
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * shifted by one sample each, intended for feeding to EFR and AMR encoders.
22
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
4 *
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
5 * Update: the new version generates a linear array of 480 16-bit PCM samples,
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
6 * where the first 160 are 0x0008, followed by two copies of linearized
28
4f47447fd17f pcma2efr: starting with DHF check
Mychaela Falconia <falcon@freecalypso.org>
parents: 22
diff changeset
7 * seqsynca.
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 */
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <stdint.h>
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
28
4f47447fd17f pcma2efr: starting with DHF check
Mychaela Falconia <falcon@freecalypso.org>
parents: 22
diff changeset
12 extern const uint8_t seqsynca_last_frame[160];
4f47447fd17f pcma2efr: starting with DHF check
Mychaela Falconia <falcon@freecalypso.org>
parents: 22
diff changeset
13 extern const uint16_t pcma_decode_table[256];
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
22
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
15 uint16_t linear_input_array[480];
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 void
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 generate_linear_inputs(void)
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 {
22
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
20 unsigned n;
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
21 uint16_t lin;
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
22
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
23 for (n = 0; n < 160; n++) {
28
4f47447fd17f pcma2efr: starting with DHF check
Mychaela Falconia <falcon@freecalypso.org>
parents: 22
diff changeset
24 lin = pcma_decode_table[seqsynca_last_frame[n]];
22
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
25 linear_input_array[n] = 0x0008;
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
26 linear_input_array[160+n] = lin;
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
27 linear_input_array[320+n] = lin;
f4420403219a pcmu2efr: change linear input gen to support 2nd frame
Mychaela Falconia <falcon@freecalypso.org>
parents: 15
diff changeset
28 }
15
528eef871e23 pcmu2efr project started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 }