diff options
Diffstat (limited to 'include/media/nbaio/NBAIO.h')
| -rw-r--r-- | include/media/nbaio/NBAIO.h | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/include/media/nbaio/NBAIO.h b/include/media/nbaio/NBAIO.h index 1da0c73..be0c15b 100644 --- a/include/media/nbaio/NBAIO.h +++ b/include/media/nbaio/NBAIO.h @@ -29,6 +29,7 @@ #include <utils/Errors.h> #include <utils/RefBase.h> #include <media/AudioTimestamp.h> +#include <system/audio.h> namespace android { @@ -52,31 +53,41 @@ enum { // the combinations that are actually needed within AudioFlinger. If the list of combinations grows // too large, then this decision should be re-visited. // Sample rate and channel count are explicit, PCM interleaved 16-bit is assumed. -typedef unsigned NBAIO_Format; -enum { - Format_Invalid +struct NBAIO_Format { +// FIXME make this a class, and change Format_... global methods to class methods +//private: + unsigned mSampleRate; + unsigned mChannelCount; + audio_format_t mFormat; + size_t mFrameSize; }; -// Return the frame size of an NBAIO_Format in bytes -size_t Format_frameSize(NBAIO_Format format); +extern const NBAIO_Format Format_Invalid; -// Return the frame size of an NBAIO_Format as a bit shift -size_t Format_frameBitShift(NBAIO_Format format); +// Return the frame size of an NBAIO_Format in bytes +size_t Format_frameSize(const NBAIO_Format& format); // Convert a sample rate in Hz and channel count to an NBAIO_Format -NBAIO_Format Format_from_SR_C(unsigned sampleRate, unsigned channelCount); +// FIXME rename +NBAIO_Format Format_from_SR_C(unsigned sampleRate, unsigned channelCount, audio_format_t format); // Return the sample rate in Hz of an NBAIO_Format -unsigned Format_sampleRate(NBAIO_Format format); +unsigned Format_sampleRate(const NBAIO_Format& format); // Return the channel count of an NBAIO_Format -unsigned Format_channelCount(NBAIO_Format format); +unsigned Format_channelCount(const NBAIO_Format& format); // Callbacks used by NBAIO_Sink::writeVia() and NBAIO_Source::readVia() below. typedef ssize_t (*writeVia_t)(void *user, void *buffer, size_t count); typedef ssize_t (*readVia_t)(void *user, const void *buffer, size_t count, int64_t readPTS); +// Check whether an NBAIO_Format is valid +bool Format_isValid(const NBAIO_Format& format); + +// Compare two NBAIO_Format values +bool Format_isEqual(const NBAIO_Format& format1, const NBAIO_Format& format2); + // Abstract class (interface) representing a data port. class NBAIO_Port : public RefBase { @@ -115,15 +126,15 @@ public: virtual NBAIO_Format format() const { return mNegotiated ? mFormat : Format_Invalid; } protected: - NBAIO_Port(NBAIO_Format format) : mNegotiated(false), mFormat(format), - mBitShift(Format_frameBitShift(format)) { } + NBAIO_Port(const NBAIO_Format& format) : mNegotiated(false), mFormat(format), + mFrameSize(Format_frameSize(format)) { } virtual ~NBAIO_Port() { } // Implementations are free to ignore these if they don't need them bool mNegotiated; // mNegotiated implies (mFormat != Format_Invalid) NBAIO_Format mFormat; // (mFormat != Format_Invalid) does not imply mNegotiated - size_t mBitShift; // assign in parallel with any assignment to mFormat + size_t mFrameSize; // assign in parallel with any assignment to mFormat }; // Abstract class (interface) representing a non-blocking data sink, for use by a data provider. @@ -220,7 +231,7 @@ public: virtual status_t getTimestamp(AudioTimestamp& timestamp) { return INVALID_OPERATION; } protected: - NBAIO_Sink(NBAIO_Format format = Format_Invalid) : NBAIO_Port(format), mFramesWritten(0) { } + NBAIO_Sink(const NBAIO_Format& format = Format_Invalid) : NBAIO_Port(format), mFramesWritten(0) { } virtual ~NBAIO_Sink() { } // Implementations are free to ignore these if they don't need them @@ -311,7 +322,7 @@ public: virtual void onTimestamp(const AudioTimestamp& timestamp) { } protected: - NBAIO_Source(NBAIO_Format format = Format_Invalid) : NBAIO_Port(format), mFramesRead(0) { } + NBAIO_Source(const NBAIO_Format& format = Format_Invalid) : NBAIO_Port(format), mFramesRead(0) { } virtual ~NBAIO_Source() { } // Implementations are free to ignore these if they don't need them |