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Optimizes encoder NaN detection and clipping by only running them when needed

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NaN detection should now be able to catch values that would create NaNs
further down.
This commit is contained in:
Jean-Marc Valin 2013-12-08 03:31:50 -05:00
parent 5626908ec3
commit c94e4bb103
4 changed files with 39 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

24
celt/celt_encoder.c
View file

@ -471,9 +471,8 @@ void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RES
coef0 = coef[0];
m = *mem;
#ifdef FIXED_POINT
/* Fast path for fixed-point in the normal 48kHz case */
if (coef[1] == 0 && upsample == 1)
/* Fast path for the normal 48kHz case and no clipping */
if (coef[1] == 0 && upsample == 1 && !clip)
{
for (i=0;i<N;i++)
{
@ -486,7 +485,6 @@ void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RES
*mem = m;
return;
}
#endif
Nu = N/upsample;
if (upsample!=1)
@ -495,17 +493,7 @@ void celt_preemphasis(const opus_val16 * OPUS_RESTRICT pcmp, celt_sig * OPUS_RES
inp[i] = 0;
}
for (i=0;i<Nu;i++)
{
celt_sig x;
x = SCALEIN(pcmp[CC*i]);
#ifndef FIXED_POINT
/* Replace NaNs with zeros */
if (!(x==x))
x = 0;
#endif
inp[i*upsample] = x;
}
inp[i*upsample] = SCALEIN(pcmp[CC*i]);
#ifndef FIXED_POINT
if (clip)
@ -1490,8 +1478,12 @@ int celt_encode_with_ec(CELTEncoder * OPUS_RESTRICT st, const opus_val16 * pcm,
enc->nbits_total+=tell-ec_tell(enc);
}
c=0; do {
int need_clip=0;
#ifndef FIXED_POINT
need_clip = st->clip && sample_max>65536.f;
#endif
celt_preemphasis(pcm+c, in+c*(N+st->overlap)+st->overlap, N, CC, st->upsample,
mode->preemph, st->preemph_memE+c, st->clip);
mode->preemph, st->preemph_memE+c, need_clip);
} while (++c<CC);

29
src/opus_encoder.c
View file

@ -924,7 +924,8 @@ opus_val16 compute_stereo_width(const opus_val16 *pcm, int frame_size, opus_int3
opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_size,
unsigned char *data, opus_int32 out_data_bytes, int lsb_depth,
const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2, int analysis_channels, downmix_func downmix)
const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2,
int analysis_channels, downmix_func downmix, int float_api)
{
void *silk_enc;
CELTEncoder *celt_enc;
@ -1377,7 +1378,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
st->user_forced_mode = MODE_CELT_ONLY;
tmp_len = opus_encode_native(st, pcm+i*(st->channels*st->Fs/50), st->Fs/50,
tmp_data+i*bytes_per_frame, bytes_per_frame, lsb_depth,
NULL, 0, c1, c2, analysis_channels, downmix);
NULL, 0, c1, c2, analysis_channels, downmix, float_api);
if (tmp_len<0)
{
RESTORE_STACK;
@ -1444,7 +1445,18 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
} else {
dc_reject(pcm, 3, &pcm_buf[total_buffer*st->channels], st->hp_mem, frame_size, st->channels, st->Fs);
}
#ifndef FIXED_POINT
if (float_api)
{
opus_val32 sum=0;
for (i=0;i<frame_size*st->channels;i++)
sum += pcm_buf[total_buffer*st->channels+i]*pcm_buf[total_buffer*st->channels+i];
/* This should filter out both NaNs and ridiculous signals that could
cause NaNs further down. */
if (!(sum < 1e9))
OPUS_CLEAR(&pcm_buf[total_buffer*st->channels], frame_size*st->channels);
}
#endif
/* SILK processing */
@ -1955,7 +1967,8 @@ opus_int32 opus_encode_float(OpusEncoder *st, const float *pcm, int analysis_fra
for (i=0;i<frame_size*st->channels;i++)
in[i] = FLOAT2INT16(pcm[i]);
ret = opus_encode_native(st, in, frame_size, data, max_data_bytes, 16, pcm, analysis_frame_size, 0, -2, st->channels, downmix_float);
ret = opus_encode_native(st, in, frame_size, data, max_data_bytes, 16,
pcm, analysis_frame_size, 0, -2, st->channels, downmix_float, 1);
RESTORE_STACK;
return ret;
}
@ -1977,7 +1990,8 @@ opus_int32 opus_encode(OpusEncoder *st, const opus_int16 *pcm, int analysis_fram
, st->analysis.subframe_mem
#endif
);
return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 16, pcm, analysis_frame_size, 0, -2, st->channels, downmix_int);
return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 16,
pcm, analysis_frame_size, 0, -2, st->channels, downmix_int, 0);
}
#else
@ -2002,7 +2016,8 @@ opus_int32 opus_encode(OpusEncoder *st, const opus_int16 *pcm, int analysis_fram
for (i=0;i<frame_size*st->channels;i++)
in[i] = (1.0f/32768)*pcm[i];
ret = opus_encode_native(st, in, frame_size, data, max_data_bytes, 16, pcm, analysis_frame_size, 0, -2, st->channels, downmix_int);
ret = opus_encode_native(st, in, frame_size, data, max_data_bytes, 16,
pcm, analysis_frame_size, 0, -2, st->channels, downmix_int, 0);
RESTORE_STACK;
return ret;
}
@ -2019,7 +2034,7 @@ opus_int32 opus_encode_float(OpusEncoder *st, const float *pcm, int analysis_fra
st->variable_duration, st->channels, st->Fs, st->bitrate_bps,
delay_compensation, downmix_float, st->analysis.subframe_mem);
return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 24,
pcm, analysis_frame_size, 0, -2, st->channels, downmix_float);
pcm, analysis_frame_size, 0, -2, st->channels, downmix_float, 1);
}
#endif

13
src/opus_multistream_encoder.c
View file

@ -674,7 +674,8 @@ static int opus_multistream_encode_native
unsigned char *data,
opus_int32 max_data_bytes,
int lsb_depth,
downmix_func downmix
downmix_func downmix,
int float_api
)
{
opus_int32 Fs;
@ -849,7 +850,7 @@ static int opus_multistream_encode_native
if (!vbr && s == st->layout.nb_streams-1)
opus_encoder_ctl(enc, OPUS_SET_BITRATE(curr_max*(8*Fs/frame_size)));
len = opus_encode_native(enc, buf, frame_size, tmp_data, curr_max, lsb_depth,
pcm, analysis_frame_size, c1, c2, st->layout.nb_channels, downmix);
pcm, analysis_frame_size, c1, c2, st->layout.nb_channels, downmix, float_api);
if (len<0)
{
RESTORE_STACK;
@ -922,7 +923,7 @@ int opus_multistream_encode(
)
{
return opus_multistream_encode_native(st, opus_copy_channel_in_short,
pcm, frame_size, data, max_data_bytes, 16, downmix_int);
pcm, frame_size, data, max_data_bytes, 16, downmix_int, 0);
}
#ifndef DISABLE_FLOAT_API
@ -935,7 +936,7 @@ int opus_multistream_encode_float(
)
{
return opus_multistream_encode_native(st, opus_copy_channel_in_float,
pcm, frame_size, data, max_data_bytes, 16, downmix_float);
pcm, frame_size, data, max_data_bytes, 16, downmix_float, 1);
}
#endif
@ -951,7 +952,7 @@ int opus_multistream_encode_float
)
{
return opus_multistream_encode_native(st, opus_copy_channel_in_float,
pcm, frame_size, data, max_data_bytes, 24, downmix_float);
pcm, frame_size, data, max_data_bytes, 24, downmix_float, 1);
}
int opus_multistream_encode(
@ -963,7 +964,7 @@ int opus_multistream_encode(
)
{
return opus_multistream_encode_native(st, opus_copy_channel_in_short,
pcm, frame_size, data, max_data_bytes, 16, downmix_int);
pcm, frame_size, data, max_data_bytes, 16, downmix_int, 0);
}
#endif

3
src/opus_private.h
View file

@ -104,7 +104,8 @@ opus_int32 compute_frame_size(const void *analysis_pcm, int frame_size,
opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_size,
unsigned char *data, opus_int32 out_data_bytes, int lsb_depth,
const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2, int analysis_channels, downmix_func downmix);
const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2,
int analysis_channels, downmix_func downmix, int float_api);
int opus_decode_native(OpusDecoder *st, const unsigned char *data, opus_int32 len,
opus_val16 *pcm, int frame_size, int decode_fec, int self_delimited,