mirror of
https://github.com/mackron/miniaudio.git
synced 2026-04-22 16:24:04 +02:00
David Reid
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
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#ifndef ma_speex_resampler_h
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#define ma_speex_resampler_h
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#define OUTSIDE_SPEEX
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#define RANDOM_PREFIX ma_speex
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#include "thirdparty/speex_resampler.h"
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#define spx_uint64_t unsigned long long
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int ma_speex_resampler_get_required_input_frame_count(SpeexResamplerState* st, spx_uint64_t out_len, spx_uint64_t* in_len);
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int ma_speex_resampler_get_expected_output_frame_count(SpeexResamplerState* st, spx_uint64_t in_len, spx_uint64_t* out_len);
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#endif /* ma_speex_resampler_h */
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#if defined(MINIAUDIO_SPEEX_RESAMPLER_IMPLEMENTATION)
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#if defined(_MSC_VER) && !defined(__clang__)
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#pragma warning(push)
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#pragma warning(disable:4244) /* conversion from 'x' to 'y', possible loss of data */
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#pragma warning(disable:4018) /* signed/unsigned mismatch */
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#pragma warning(disable:4706) /* assignment within conditional expression */
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#else
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#pragma GCC diagnostic push
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#endif
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#include "thirdparty/resample.c"
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#if defined(_MSC_VER) && !defined(__clang__)
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#pragma warning(pop)
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#else
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#pragma GCC diagnostic pop
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#endif
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EXPORT int ma_speex_resampler_get_required_input_frame_count(SpeexResamplerState* st, spx_uint64_t out_len, spx_uint64_t* in_len)
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{
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spx_uint64_t count;
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if (st == NULL || in_len == NULL) {
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return RESAMPLER_ERR_INVALID_ARG;
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}
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*in_len = 0;
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if (out_len == 0) {
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return RESAMPLER_ERR_SUCCESS; /* Nothing to do. */
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}
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/* miniaudio only uses interleaved APIs so we can safely just use channel index 0 for the calculations. */
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if (st->nb_channels == 0) {
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return RESAMPLER_ERR_BAD_STATE;
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}
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count = out_len * st->int_advance;
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count += (st->samp_frac_num[0] + (out_len * st->frac_advance)) / st->den_rate;
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*in_len = count;
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return RESAMPLER_ERR_SUCCESS;
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}
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EXPORT int ma_speex_resampler_get_expected_output_frame_count(SpeexResamplerState* st, spx_uint64_t in_len, spx_uint64_t* out_len)
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{
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spx_uint64_t count;
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spx_uint64_t last_sample;
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spx_uint32_t samp_frac_num;
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if (st == NULL || out_len == NULL) {
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return RESAMPLER_ERR_INVALID_ARG;
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}
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*out_len = 0;
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if (out_len == 0) {
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return RESAMPLER_ERR_SUCCESS; /* Nothing to do. */
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}
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/* miniaudio only uses interleaved APIs so we can safely just use channel index 0 for the calculations. */
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if (st->nb_channels == 0) {
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return RESAMPLER_ERR_BAD_STATE;
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}
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count = 0;
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last_sample = st->last_sample[0];
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samp_frac_num = st->samp_frac_num[0];
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while (!(last_sample >= in_len)) {
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count += 1;
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last_sample += st->int_advance;
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samp_frac_num += st->frac_advance;
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if (samp_frac_num >= st->den_rate) {
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samp_frac_num -= st->den_rate;
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last_sample += 1;
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}
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}
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*out_len = count;
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return RESAMPLER_ERR_SUCCESS;
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}
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#endif |