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More preparation work for variable frame size

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This commit is contained in:
Jean-Marc Valin 2010-05-05 07:21:21 -04:00
parent 3b918bac54
commit 0475267e62
1 changed files with 14 additions and 22 deletions
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36
libcelt/celt.c
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@ -82,8 +82,6 @@ static const float transientWindow[16] = {
struct CELTEncoder {
celt_uint32 marker;
const CELTMode *mode; /**< Mode used by the encoder */
int frame_size;
int block_size;
int overlap;
int channels;
@ -133,7 +131,7 @@ static int check_encoder(const CELTEncoder *st)
CELTEncoder *celt_encoder_create(const CELTMode *mode, int channels, int *error)
{
int N, C;
int C;
CELTEncoder *st;
if (check_mode(mode) != CELT_OK)
@ -160,7 +158,6 @@ CELTEncoder *celt_encoder_create(const CELTMode *mode, int channels, int *error)
return NULL;
}
N = mode->mdctSize;
C = channels;
st = celt_alloc(sizeof(CELTEncoder));
@ -172,8 +169,6 @@ CELTEncoder *celt_encoder_create(const CELTMode *mode, int channels, int *error)
}
st->marker = ENCODERPARTIAL;
st->mode = mode;
st->frame_size = N;
st->block_size = N;
st->overlap = mode->overlap;
st->channels = channels;
@ -604,7 +599,7 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig * pcm, celt_sig
ec_byte_writeinit_buffer(&buf, compressed, nbCompressedBytes);
ec_enc_init(&enc,&buf);
N = st->block_size;
N = M*st->mode->shortMdctSize;
N4 = (N-st->overlap)>>1;
ALLOC(in, 2*C*N-2*C*N4, celt_sig);
@ -890,7 +885,7 @@ int celt_encode_float(CELTEncoder * restrict st, const celt_sig * pcm, celt_sig
if (resynth)
{
if (st->pitch_available>0 && st->pitch_available<MAX_PERIOD)
st->pitch_available+=st->frame_size;
st->pitch_available+=N;
if (mdct_weight_shift)
{
@ -962,6 +957,7 @@ int celt_encode(CELTEncoder * restrict st, const celt_int16 * pcm, celt_int16 *
{
int j, ret, C, N;
VARDECL(celt_sig, in);
const int M=st->mode->nbShortMdcts;
SAVE_STACK;
if (check_encoder(st) != CELT_OK)
@ -974,7 +970,7 @@ int celt_encode(CELTEncoder * restrict st, const celt_int16 * pcm, celt_int16 *
return CELT_BAD_ARG;
C=CHANNELS(st->channels);
N=st->block_size;
N=M*st->mode->shortMdctSize;
ALLOC(in, C*N, celt_sig);
for (j=0;j<C*N;j++) {
in[j] = SCALEOUT(pcm[j]);
@ -1048,11 +1044,13 @@ int celt_encoder_ctl(CELTEncoder * restrict st, int request, ...)
case CELT_SET_VBR_RATE_REQUEST:
{
celt_int32 value = va_arg(ap, celt_int32);
int N = st->mode->nbShortMdcts*st->mode->shortMdctSize;
if (value<0)
goto bad_arg;
if (value>3072000)
value = 3072000;
st->vbr_rate = ((st->mode->Fs<<3)+(st->block_size>>1))/st->block_size;
/* FIXME: We need to find a better way to do this if N is going to change */
st->vbr_rate = ((st->mode->Fs<<3)+(N>>1))/N;
st->vbr_rate = ((value<<7)+(st->vbr_rate>>1))/st->vbr_rate;
}
break;
@ -1121,8 +1119,6 @@ bad_request:
struct CELTDecoder {
celt_uint32 marker;
const CELTMode *mode;
int frame_size;
int block_size;
int overlap;
int channels;
@ -1162,7 +1158,7 @@ int check_decoder(const CELTDecoder *st)
CELTDecoder *celt_decoder_create(const CELTMode *mode, int channels, int *error)
{
int N, C;
int C;
CELTDecoder *st;
if (check_mode(mode) != CELT_OK)
@ -1189,7 +1185,6 @@ CELTDecoder *celt_decoder_create(const CELTMode *mode, int channels, int *error)
return NULL;
}
N = mode->mdctSize;
C = CHANNELS(channels);
st = celt_alloc(sizeof(CELTDecoder));
@ -1202,8 +1197,6 @@ CELTDecoder *celt_decoder_create(const CELTMode *mode, int channels, int *error)
st->marker = DECODERPARTIAL;
st->mode = mode;
st->frame_size = N;
st->block_size = N;
st->overlap = mode->overlap;
st->channels = channels;
@ -1276,9 +1269,9 @@ void celt_decoder_destroy(CELTDecoder *st)
celt_free(st);
}
static void celt_decode_lost(CELTDecoder * restrict st, celt_word16 * restrict pcm)
static void celt_decode_lost(CELTDecoder * restrict st, celt_word16 * restrict pcm, int N)
{
int c, N;
int c;
int pitch_index;
int overlap = st->mode->overlap;
celt_word16 fade = Q15ONE;
@ -1287,7 +1280,6 @@ static void celt_decode_lost(CELTDecoder * restrict st, celt_word16 * restrict p
const int C = CHANNELS(st->channels);
int offset;
SAVE_STACK;
N = st->block_size;
len = N+st->mode->overlap;
@ -1479,7 +1471,7 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
if (pcm==NULL)
return CELT_BAD_ARG;
N = st->block_size;
N = M*st->mode->shortMdctSize;
N4 = (N-st->overlap)>>1;
ALLOC(freq, C*N, celt_sig); /**< Interleaved signal MDCTs */
@ -1488,7 +1480,7 @@ int celt_decode_float(CELTDecoder * restrict st, const unsigned char *data, int
if (data == NULL)
{
celt_decode_lost(st, pcm);
celt_decode_lost(st, pcm, N);
RESTORE_STACK;
return 0;
}
@ -1638,7 +1630,7 @@ int celt_decode(CELTDecoder * restrict st, const unsigned char *data, int len, c
return CELT_BAD_ARG;
C = CHANNELS(st->channels);
N = st->block_size;
N = st->mode->nbShortMdcts*st->mode->shortMdctSize;
ALLOC(out, C*N, celt_sig);
ret=celt_decode_float(st, data, len, out);