added a resampling class
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3415 a95241bf-73f2-0310-859d-f6bbb57e9c96
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beveloper
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@ -6,6 +6,7 @@ Addon mixer.media_addon : media :
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AudioMixer.cpp
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MixerAddOn.cpp
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FillMixBuffer.cpp
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Resampler.cpp
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;
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LinkSharedOSLibs mixer.media_addon : be media ;
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@ -0,0 +1,128 @@
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/* Copyright (C) 2003 Marcus Overhagen
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* Released under terms of the MIT license.
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*
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* A simple resampling class for the audio mixer.
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* You pick the conversation function on object creation,
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* and then call the Resample() function, specifying data pointer,
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* offset (in bytes) to the next sample, and count of samples for
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* both source and destination.
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*
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*/
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#include "Resampler.h"
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#include "debug.h"
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Resampler::Resampler(uint32 src_format, uint32 dst_format)
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: fFunc(0)
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{
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if (dst_format == media_raw_audio_format::B_AUDIO_FLOAT) {
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switch (src_format) {
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case media_raw_audio_format::B_AUDIO_FLOAT:
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fFunc = &Resampler::float_to_float;
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return;
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case media_raw_audio_format::B_AUDIO_INT:
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fFunc = &Resampler::int32_to_float;
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return;
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case media_raw_audio_format::B_AUDIO_SHORT:
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fFunc = &Resampler::int16_to_float;
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return;
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case media_raw_audio_format::B_AUDIO_CHAR:
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fFunc = &Resampler::int8_to_float;
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return;
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case media_raw_audio_format::B_AUDIO_UCHAR:
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fFunc = &Resampler::uint8_to_float;
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return;
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default:
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FATAL("Resampler::Resampler: unknown source format 0x%x\n", src_format);
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return;
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}
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}
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if (src_format == media_raw_audio_format::B_AUDIO_FLOAT) {
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switch (dst_format) {
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// float=>float already handled above
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case media_raw_audio_format::B_AUDIO_INT:
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fFunc = &Resampler::float_to_int32;
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return;
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case media_raw_audio_format::B_AUDIO_SHORT:
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fFunc = &Resampler::float_to_int16;
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return;
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case media_raw_audio_format::B_AUDIO_CHAR:
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fFunc = &Resampler::float_to_int8;
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return;
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case media_raw_audio_format::B_AUDIO_UCHAR:
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fFunc = &Resampler::float_to_uint8;
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return;
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default:
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FATAL("Resampler::Resampler: unknown destination format 0x%x\n", dst_format);
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return;
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}
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}
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FATAL("Resampler::Resampler: source or destination format must be B_AUDIO_FLOAT\n");
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}
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Resampler::~Resampler()
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{
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}
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status_t
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Resampler::InitCheck()
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{
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return (fFunc != 0) ? B_OK : B_ERROR;
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}
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void
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Resampler::float_to_float(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::int32_to_float(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::int16_to_float(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::int8_to_float(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::uint8_to_float(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::float_to_int32(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::float_to_int16(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::float_to_int8(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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void
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Resampler::float_to_uint8(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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}
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@ -0,0 +1,59 @@
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#ifndef _RESAMPLER_H
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#define _RESAMPLER_H
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/* Copyright (C) 2003 Marcus Overhagen
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* Released under terms of the MIT license.
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*
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* A simple resampling class for the audio mixer.
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* You pick the conversation function on object creation,
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* and then call the Resample() function, specifying data pointer,
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* offset (in bytes) to the next sample, and count of samples for
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* both source and destination.
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*
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*/
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#include <MediaDefs.h>
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class Resampler
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{
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public:
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Resampler(uint32 sourceformat, uint32 destformat);
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virtual ~Resampler();
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status_t InitCheck();
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void Resample(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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protected:
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virtual void float_to_float (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void int32_to_float (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void int16_to_float (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void int8_to_float (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void uint8_to_float (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void float_to_int32 (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void float_to_int16 (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void float_to_int8 (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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virtual void float_to_uint8 (const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain);
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private:
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void (Resampler::*fFunc) (const void *, int32, int32, void *, int32, int32, float);
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};
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inline void
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Resampler::Resample(const void *src, int32 src_sample_offset, int32 src_sample_count,
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void *dst, int32 dst_sample_offset, int32 dst_sample_count, float gain)
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{
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(this->*fFunc)(src, src_sample_offset, src_sample_count, dst, dst_sample_offset, dst_sample_count, gain);
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}
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#endif
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