oysteikt/mpd
0
0
Fork 0
Code Issues Pull Requests Releases Activity

pcm/Traits: add "SILENCE" attribute

Browse Source
This commit is contained in:
Max Kellermann 2017-01-19 11:57:01 +01:00
parent 7a098ca0ed
commit df9a665994
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/pcm/Silence.cxx
View File

@ -19,6 +19,7 @@
#include "config.h" #include "config.h"
#include "Silence.hxx" #include "Silence.hxx"
#include "Traits.hxx"
#include "SampleFormat.hxx" #include "SampleFormat.hxx"
#include "util/WritableBuffer.hxx" #include "util/WritableBuffer.hxx"
@ -29,7 +30,7 @@ PcmSilence(WritableBuffer<void> dest, SampleFormat format)
{ {
uint8_t pattern = 0; uint8_t pattern = 0;
if (format == SampleFormat::DSD) if (format == SampleFormat::DSD)
pattern = 0x69; pattern = SampleTraits<SampleFormat::DSD>::SILENCE;
memset(dest.data, pattern, dest.size); memset(dest.data, pattern, dest.size);
} }

11
src/pcm/Traits.hxx
View File

@ -85,6 +85,11 @@ struct SampleTraits<SampleFormat::S8> {
* The maximum sample value. * The maximum sample value.
*/ */
static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1; static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1;
/**
* A value which represents "silence".
*/
static constexpr value_type SILENCE = 0;
}; };
template<> template<>
@ -101,6 +106,7 @@ struct SampleTraits<SampleFormat::S16> {
static constexpr value_type MIN = -(sum_type(1) << (BITS - 1)); static constexpr value_type MIN = -(sum_type(1) << (BITS - 1));
static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1; static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1;
static constexpr value_type SILENCE = 0;
}; };
template<> template<>
@ -117,6 +123,7 @@ struct SampleTraits<SampleFormat::S32> {
static constexpr value_type MIN = -(sum_type(1) << (BITS - 1)); static constexpr value_type MIN = -(sum_type(1) << (BITS - 1));
static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1; static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1;
static constexpr value_type SILENCE = 0;
}; };
template<> template<>
@ -133,6 +140,7 @@ struct SampleTraits<SampleFormat::S24_P32> {
static constexpr value_type MIN = -(sum_type(1) << (BITS - 1)); static constexpr value_type MIN = -(sum_type(1) << (BITS - 1));
static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1; static constexpr value_type MAX = (sum_type(1) << (BITS - 1)) - 1;
static constexpr value_type SILENCE = 0;
}; };
template<> template<>
@ -148,6 +156,7 @@ struct SampleTraits<SampleFormat::FLOAT> {
static constexpr value_type MIN = -1; static constexpr value_type MIN = -1;
static constexpr value_type MAX = 1; static constexpr value_type MAX = 1;
static constexpr value_type SILENCE = 0;
}; };
template<> template<>
@ -157,6 +166,8 @@ struct SampleTraits<SampleFormat::DSD> {
typedef const value_type *const_pointer_type; typedef const value_type *const_pointer_type;
static constexpr size_t SAMPLE_SIZE = sizeof(value_type); static constexpr size_t SAMPLE_SIZE = sizeof(value_type);
static constexpr value_type SILENCE = 0x69;
}; };
#endif #endif