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i2s can send now buffers (#5349)

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* i2s can send now buffers

* adding mono and stereo, with blocking and non blocking support

* fixing crash

* cosmetic changes

* we dont need the & 0xffff

* using unsigned integers since we'll never be using negative numbers
This commit is contained in:
aguaviva
2018-11-24 06:00:34 +01:00
committed by Develo
parent 19a0a0b6fd
commit cf21dfda64
2 changed files with 80 additions and 5 deletions
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11
cores/esp8266/i2s.h
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@ -54,11 +54,18 @@ bool i2s_is_full();//returns true if DMA is full and can not take more bytes (ov
bool i2s_is_empty();//returns true if DMA is empty (underflow)
bool i2s_rx_is_full();
bool i2s_rx_is_empty();
int16_t i2s_available();// returns the number of samples than can be written before blocking
int16_t i2s_rx_available();// returns the number of samples than can be written before blocking
uint16_t i2s_available();// returns the number of samples than can be written before blocking
uint16_t i2s_rx_available();// returns the number of samples than can be written before blocking
void i2s_set_callback(void (*callback) (void));
void i2s_rx_set_callback(void (*callback) (void));
// writes a buffer of frames into the DMA memory, returns the amount of frames written
// A frame is just a int16_t for mono, for stereo a frame is two int16_t, one for each channel.
uint16_t i2s_write_buffer_mono(int16_t *frames, uint16_t frame_count);
uint16_t i2s_write_buffer_mono_nb(int16_t *frames, uint16_t frame_count);
uint16_t i2s_write_buffer(int16_t *frames, uint16_t frame_count);
uint16_t i2s_write_buffer_nb(int16_t *frames, uint16_t frame_count);
#ifdef __cplusplus
}
#endif