mirror of
https://github.com/mackron/miniaudio.git
synced 2026-04-22 00:06:59 +02:00
David Reid
131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
|
|
#ifndef ma_speex_resampler_h
|
|
#define ma_speex_resampler_h
|
|
|
|
#define OUTSIDE_SPEEX
|
|
#define RANDOM_PREFIX ma_speex
|
|
#include "thirdparty/speex_resampler.h"
|
|
|
|
#ifdef _MSC_VER
|
|
#if defined(__clang__)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wlanguage-extension-token"
|
|
#pragma GCC diagnostic ignored "-Wlong-long"
|
|
#pragma GCC diagnostic ignored "-Wc++11-long-long"
|
|
#endif
|
|
#define spx_uint64_t unsigned __int64
|
|
#if defined(__clang__)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
#else
|
|
#define MA_HAS_STDINT
|
|
#include <stdint.h>
|
|
#define spx_uint64_t uint64_t
|
|
#endif
|
|
|
|
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 */
|
|
|
|
#if defined(MINIAUDIO_SPEEX_RESAMPLER_IMPLEMENTATION)
|
|
/* The Speex resampler uses "inline", which is not defined for C89. We need to define it here. */
|
|
#if defined(__GNUC__) && !defined(_MSC_VER)
|
|
#if defined(__STRICT_ANSI__)
|
|
#if !defined(inline)
|
|
#define inline __inline__ __attribute__((always_inline))
|
|
#define MA_SPEEX_INLINE_DEFINED
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(_MSC_VER) && !defined(__clang__)
|
|
#pragma warning(push)
|
|
#pragma warning(disable:4244) /* conversion from 'x' to 'y', possible loss of data */
|
|
#pragma warning(disable:4018) /* signed/unsigned mismatch */
|
|
#pragma warning(disable:4706) /* assignment within conditional expression */
|
|
#else
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wsign-compare" /* comparison between signed and unsigned integer expressions */
|
|
#endif
|
|
#include "thirdparty/resample.c"
|
|
#if defined(_MSC_VER) && !defined(__clang__)
|
|
#pragma warning(pop)
|
|
#else
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
#if defined(MA_SPEEX_INLINE_DEFINED)
|
|
#undef inline
|
|
#undef MA_SPEEX_INLINE_DEFINED
|
|
#endif
|
|
|
|
EXPORT int ma_speex_resampler_get_required_input_frame_count(SpeexResamplerState* st, spx_uint64_t out_len, spx_uint64_t* in_len)
|
|
{
|
|
spx_uint64_t count;
|
|
|
|
if (st == NULL || in_len == NULL) {
|
|
return RESAMPLER_ERR_INVALID_ARG;
|
|
}
|
|
|
|
*in_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 = out_len * st->int_advance;
|
|
count += (st->samp_frac_num[0] + (out_len * st->frac_advance)) / st->den_rate;
|
|
|
|
*in_len = count;
|
|
|
|
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
|