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SRC: Implement ma_speex_resampler_get_expected_output_frame_count().

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This commit is contained in:
David Reid
2020-01-19 17:47:22 +10:00
parent f7ff9ee19e
commit 867e1ee7e4
2 changed files with 49 additions and 2 deletions
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extras/speex_resampler/ma_speex_resampler.h
+42
View File
@@ -9,6 +9,7 @@
#define spx_uint64_t unsigned long long
int ma_speex_resampler_get_required_input_frame_count(SpeexResamplerState* st, spx_uint64_t out_len, spx_uint64_t* in_len);
int ma_speex_resampler_get_expected_output_frame_count(SpeexResamplerState* st, spx_uint64_t in_len, spx_uint64_t* out_len);
#endif /* ma_speex_resampler_h */
@@ -54,4 +55,45 @@ EXPORT int ma_speex_resampler_get_required_input_frame_count(SpeexResamplerState
return RESAMPLER_ERR_SUCCESS;
}
EXPORT int ma_speex_resampler_get_expected_output_frame_count(SpeexResamplerState* st, spx_uint64_t in_len, spx_uint64_t* out_len)
{
spx_uint64_t count;
spx_uint64_t last_sample;
spx_uint32_t samp_frac_num;
if (st == NULL || out_len == NULL) {
return RESAMPLER_ERR_INVALID_ARG;
}
*out_len = 0;
if (out_len == 0) {
return RESAMPLER_ERR_SUCCESS; /* Nothing to do. */
}
/* miniaudio only uses interleaved APIs so we can safely just use channel index 0 for the calculations. */
if (st->nb_channels == 0) {
return RESAMPLER_ERR_BAD_STATE;
}
count = 0;
last_sample = st->last_sample[0];
samp_frac_num = st->samp_frac_num[0];
while (!(last_sample >= in_len)) {
count += 1;
last_sample += st->int_advance;
samp_frac_num += st->frac_advance;
if (samp_frac_num >= st->den_rate) {
samp_frac_num -= st->den_rate;
last_sample += 1;
}
}
*out_len = count;
return RESAMPLER_ERR_SUCCESS;
}
#endif
research/ma_resampler.h
+7 -2
View File
@@ -802,8 +802,13 @@ ma_uint64 ma_resampler_get_expected_output_frame_count(ma_resampler* pResampler,
case ma_resample_algorithm_speex:
{
#if defined(MA_HAS_SPEEX_RESAMPLER)
/* TODO: Implement me. */
return 0;
ma_uint64 count;
int speexErr = ma_speex_resampler_get_expected_output_frame_count((SpeexResamplerState*)pResampler->state.speex.pSpeexResamplerState, inputFrameCount, &count);
if (speexErr != RESAMPLER_ERR_SUCCESS) {
return 0;
}
return count;
#else
break;
#endif