diff options
Diffstat (limited to 'gr-vocoder/lib/codec2/codec2.c')
| -rw-r--r-- | gr-vocoder/lib/codec2/codec2.c | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/gr-vocoder/lib/codec2/codec2.c b/gr-vocoder/lib/codec2/codec2.c index 92708ee32..93ea9208c 100644 --- a/gr-vocoder/lib/codec2/codec2.c +++ b/gr-vocoder/lib/codec2/codec2.c @@ -4,7 +4,7 @@ AUTHOR......: David Rowe DATE CREATED: 21/8/2010 - Codec2 fully quantised encoder and decoder functions. If you want use + Codec2 fully quantised encoder and decoder functions. If you want use codec2, the codec2_xxx functions are for you. \*---------------------------------------------------------------------------*/ @@ -45,16 +45,16 @@ #include "codec2_internal.h" /*---------------------------------------------------------------------------*\ - + FUNCTIONS \*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*\ - - FUNCTION....: codec2_create - AUTHOR......: David Rowe - DATE CREATED: 21/8/2010 + + FUNCTION....: codec2_create + AUTHOR......: David Rowe + DATE CREATED: 21/8/2010 Create and initialise an instance of the codec. Returns a pointer to the codec states or NULL on failure. One set of states is @@ -106,10 +106,10 @@ void *codec2_create() } /*---------------------------------------------------------------------------*\ - - FUNCTION....: codec2_create - AUTHOR......: David Rowe - DATE CREATED: 21/8/2010 + + FUNCTION....: codec2_create + AUTHOR......: David Rowe + DATE CREATED: 21/8/2010 Destroy an instance of the codec. @@ -118,7 +118,7 @@ void *codec2_create() void codec2_destroy(void *codec2_state) { CODEC2 *c2; - + assert(codec2_state != NULL); c2 = (CODEC2*)codec2_state; nlp_destroy(c2->nlp); @@ -126,12 +126,12 @@ void codec2_destroy(void *codec2_state) } /*---------------------------------------------------------------------------*\ - - FUNCTION....: codec2_encode - AUTHOR......: David Rowe - DATE CREATED: 21/8/2010 - Encodes 160 speech samples (20ms of speech) into 51 bits. + FUNCTION....: codec2_encode + AUTHOR......: David Rowe + DATE CREATED: 21/8/2010 + + Encodes 160 speech samples (20ms of speech) into 51 bits. The codec2 algorithm actually operates internally on 10ms (80 sample) frames, so we run the encoding algorithm twice. On the @@ -148,7 +148,7 @@ void codec2_destroy(void *codec2_state) Wo (fundamental frequnecy) 7 Voicing (10ms update) 2 TOTAL 51 - + \*---------------------------------------------------------------------------*/ void codec2_encode(void *codec2_state, unsigned char * bits, short speech[]) @@ -174,13 +174,13 @@ void codec2_encode(void *codec2_state, unsigned char * bits, short speech[]) analyse_one_frame(c2, &model, &speech[N]); voiced2 = model.voiced; - + Wo_index = encode_Wo(model.Wo); - encode_amplitudes(lsp_indexes, + encode_amplitudes(lsp_indexes, &energy_index, - &model, - c2->Sn, - c2->w); + &model, + c2->Sn, + c2->w); memset(bits, '\0', ((CODEC2_BITS_PER_FRAME + 7) / 8)); pack(bits, &nbit, Wo_index, WO_BITS); for(i=0; i<LPC_ORD; i++) { @@ -189,15 +189,15 @@ void codec2_encode(void *codec2_state, unsigned char * bits, short speech[]) pack(bits, &nbit, energy_index, E_BITS); pack(bits, &nbit, voiced1, 1); pack(bits, &nbit, voiced2, 1); - + assert(nbit == CODEC2_BITS_PER_FRAME); } /*---------------------------------------------------------------------------*\ - - FUNCTION....: codec2_decode - AUTHOR......: David Rowe - DATE CREATED: 21/8/2010 + + FUNCTION....: codec2_decode + AUTHOR......: David Rowe + DATE CREATED: 21/8/2010 Decodes frames of 51 bits into 160 samples (20ms) of speech. @@ -239,7 +239,7 @@ void codec2_decode(void *codec2_state, short speech[], model.Wo = decode_Wo(Wo_index); model.L = PI/model.Wo; memset(&model.A, 0, (model.L+1)*sizeof(model.A[0])); - decode_amplitudes(&model, + decode_amplitudes(&model, ak, lsp_indexes, energy_index, @@ -270,10 +270,10 @@ void codec2_decode(void *codec2_state, short speech[], } /*---------------------------------------------------------------------------*\ - - FUNCTION....: synthesise_one_frame() - AUTHOR......: David Rowe - DATE CREATED: 23/8/2010 + + FUNCTION....: synthesise_one_frame() + AUTHOR......: David Rowe + DATE CREATED: 23/8/2010 Synthesise 80 speech samples (10ms) from model parameters. @@ -299,14 +299,14 @@ void synthesise_one_frame(CODEC2 *c2, short speech[], MODEL *model, float ak[]) } /*---------------------------------------------------------------------------*\ - - FUNCTION....: analyse_one_frame() - AUTHOR......: David Rowe - DATE CREATED: 23/8/2010 + + FUNCTION....: analyse_one_frame() + AUTHOR......: David Rowe + DATE CREATED: 23/8/2010 Extract sinusoidal model parameters from 80 speech samples (10ms of speech). - + \*---------------------------------------------------------------------------*/ void analyse_one_frame(CODEC2 *c2, MODEL *model, short speech[]) |