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Allow epin_buf to be written directly into in case no TX FIFOs are used.

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This is helpful if you have already encoded audio data and want an
efficient way to send it. However, this approach is NOT THREADSAFE so
far and works realiably ONLY IF tud_audio_n_write_ep_in_buffer() is NOT
called form an interrupt!
This commit is contained in:
Reinhard Panhuber
2020-09-01 11:26:16 +02:00
parent 83bd214203
commit 8f0693346c
2 changed files with 108 additions and 27 deletions
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13
src/class/audio/audio_device.h
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@@ -59,6 +59,10 @@
#define CFG_TUD_AUDIO_TX_FIFO_SIZE 0 // Buffer size per channel
#endif
#if CFG_TUD_AUDIO_TX_FIFO_SIZE && CFG_TUD_AUDIO_TX_DMA_RINGBUFFER_SIZE
#error TX_FIFOs and TX_DMA_RINGBUFFER can not be used simultaneously!
#endif
#ifndef CFG_TUD_AUDIO_RX_FIFO_SIZE
#define CFG_TUD_AUDIO_RX_FIFO_SIZE 0 // Buffer size per channel
#endif
@@ -171,8 +175,12 @@ uint16_t tud_audio_n_read (uint8_t itf, uint8_t channelId, void* buffer, u
void tud_audio_n_read_flush (uint8_t itf, uint8_t channelId);
#endif
#if CFG_TUD_AUDIO_EPSIZE_IN && !CFG_TUD_AUDIO_TX_FIFO_SIZE
uint16_t tud_audio_n_write_ep_in_buffer(uint8_t itf, const void * data, uint16_t len)
#endif
#if CFG_TUD_AUDIO_EPSIZE_IN && CFG_TUD_AUDIO_TX_FIFO_SIZE
uint16_t tud_audio_n_write (uint8_t itf, uint8_t channelId, uint8_t const* buffer, uint16_t bufsize);
uint16_t tud_audio_n_write (uint8_t itf, uint8_t channelId, const void * data, uint16_t len);
#endif
#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN > 0
@@ -218,7 +226,8 @@ bool tud_audio_buffer_and_schedule_control_xfer(uint8_t rhport, tusb_control_req
//--------------------------------------------------------------------+
#if CFG_TUD_AUDIO_EPSIZE_IN
TU_ATTR_WEAK bool tud_audio_tx_done_cb(uint8_t rhport, uint16_t * n_bytes_copied);
TU_ATTR_WEAK bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting);
TU_ATTR_WEAK bool tud_audio_tx_done_post_load_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting);
#endif
#if CFG_TUD_AUDIO_EPSIZE_OUT