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Implement functions to allow for DMA usage in audio driver.

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- Add tud_audio_n_get_ep_out_ff(), tud_audio_n_get_ep_in_ff(),
tud_audio_n_get_rx_support_ff(), and tud_audio_n_get_tx_support_ff()
- Change get_linear_read/write_info() to return linear and wrapped part
at once
- Adjusted affected code in audio_device.c and tested with
audio_4_channel.
This commit is contained in:
Reinhard Panhuber
2021-04-23 10:27:48 +02:00
parent d8fd4352a3
commit 03f974c9b9
5 changed files with 103 additions and 48 deletions
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77
src/class/audio/audio_device.c
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@@ -447,27 +447,39 @@ bool tud_audio_n_clear_ep_out_ff(uint8_t func_id)
return tu_fifo_clear(&_audiod_fct[func_id].ep_out_ff);
}
tu_fifo_t* tud_audio_n_get_ep_out_ff(uint8_t func_id)
{
if(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL) return &_audiod_fct[func_id].ep_out_ff;
return NULL;
}
#endif
#if CFG_TUD_AUDIO_ENABLE_DECODING && CFG_TUD_AUDIO_ENABLE_EP_OUT
// Delete all content in the support RX FIFOs
bool tud_audio_n_clear_rx_support_ff(uint8_t func_id, uint8_t ff_idx)
{
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL, ff_idx < _audiod_fct[func_id].n_rx_supp_ff);
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_rx_supp_ff);
return tu_fifo_clear(&_audiod_fct[func_id].rx_supp_ff[ff_idx]);
}
uint16_t tud_audio_n_available_support_ff(uint8_t func_id, uint8_t ff_idx)
{
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL, ff_idx < _audiod_fct[func_id].n_rx_supp_ff);
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_rx_supp_ff);
return tu_fifo_count(&_audiod_fct[func_id].rx_supp_ff[ff_idx]);
}
uint16_t tud_audio_n_read_support_ff(uint8_t func_id, uint8_t ff_idx, void* buffer, uint16_t bufsize)
{
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL, ff_idx < _audiod_fct[func_id].n_rx_supp_ff);
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_rx_supp_ff);
return tu_fifo_read_n(&_audiod_fct[func_id].rx_supp_ff[ff_idx], buffer, bufsize);
}
tu_fifo_t* tud_audio_n_get_rx_support_ff(uint8_t func_id, uint8_t ff_idx)
{
if(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_rx_supp_ff) return &_audiod_fct[func_id].rx_supp_ff[ff_idx];
return NULL;
}
#endif
// This function is called once an audio packet is received by the USB and is responsible for putting data from USB memory into EP_OUT_FIFO (or support FIFOs + decoding of received stream into audio channels).
@@ -635,32 +647,26 @@ static bool audiod_decode_type_I_pcm(uint8_t rhport, audiod_function_t* audio, u
uint8_t cnt_ff;
// Decode
void * dst;
void * dst, * dst_wrap;
uint8_t * src;
uint8_t * dst_end;
uint16_t len;
uint16_t len, len_wrap;
for (cnt_ff = 0; cnt_ff < n_ff_used; cnt_ff++)
{
src = &audio->lin_buf_out[cnt_ff*audio->n_channels_per_ff_rx * audio->n_bytes_per_sampe_rx];
len = tu_fifo_get_linear_write_info(&audio->rx_supp_ff[cnt_ff], 0, &dst, nBytesPerFFToRead);
tu_fifo_advance_write_pointer(&audio->rx_supp_ff[cnt_ff], len);
len = tu_fifo_get_linear_write_info(&audio->rx_supp_ff[cnt_ff], 0, nBytesPerFFToRead, &dst, &len_wrap, &dst_wrap);
dst_end = dst + len;
src = audiod_interleaved_copy_bytes_fast_decode(nBytesToCopy, dst, dst_end, src, n_ff_used);
// Handle wrapped part of FIFO
if (len < nBytesPerFFToRead)
if (len_wrap != 0)
{
len = tu_fifo_get_linear_write_info(&audio->rx_supp_ff[cnt_ff], 0, &dst, nBytesPerFFToRead - len);
tu_fifo_advance_write_pointer(&audio->rx_supp_ff[cnt_ff], len);
dst_end = dst + len;
audiod_interleaved_copy_bytes_fast_decode(nBytesToCopy, dst, dst_end, src, n_ff_used);
dst_end = dst_wrap + len_wrap;
audiod_interleaved_copy_bytes_fast_decode(nBytesToCopy, dst_wrap, dst_end, src, n_ff_used);
}
tu_fifo_advance_write_pointer(&audio->rx_supp_ff[cnt_ff], len + len_wrap);
}
// Number of bytes should be a multiple of CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_RX * CFG_TUD_AUDIO_N_CHANNELS_RX but checking makes no sense - no way to correct it
@@ -699,9 +705,16 @@ bool tud_audio_n_clear_ep_in_ff(uint8_t func_id) // Del
return tu_fifo_clear(&_audiod_fct[func_id].ep_in_ff);
}
tu_fifo_t* tud_audio_n_get_ep_in_ff(uint8_t func_id)
{
if(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL) return &_audiod_fct[func_id].ep_in_ff;
return NULL;
}
#endif
#if CFG_TUD_AUDIO_ENABLE_ENCODING && CFG_TUD_AUDIO_ENABLE_EP_IN
uint16_t tud_audio_n_flush_tx_support_ff(uint8_t func_id) // Force all content in the support TX FIFOs to be written into linear buffer and schedule a transmit
{
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL);
@@ -719,15 +732,22 @@ uint16_t tud_audio_n_flush_tx_support_ff(uint8_t func_id) // For
bool tud_audio_n_clear_tx_support_ff(uint8_t func_id, uint8_t ff_idx)
{
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL, ff_idx < _audiod_fct[func_id].n_tx_supp_ff);
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_tx_supp_ff);
return tu_fifo_clear(&_audiod_fct[func_id].tx_supp_ff[ff_idx]);
}
uint16_t tud_audio_n_write_support_ff(uint8_t func_id, uint8_t ff_idx, const void * data, uint16_t len)
{
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL, ff_idx < _audiod_fct[func_id].n_tx_supp_ff);
TU_VERIFY(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_tx_supp_ff);
return tu_fifo_write_n(&_audiod_fct[func_id].tx_supp_ff[ff_idx], data, len);
}
tu_fifo_t* tud_audio_n_get_tx_support_ff(uint8_t func_id, uint8_t ff_idx)
{
if(func_id < CFG_TUD_AUDIO && _audiod_fct[func_id].p_desc != NULL && ff_idx < _audiod_fct[func_id].n_tx_supp_ff) return &_audiod_fct[func_id].tx_supp_ff[ff_idx];
return NULL;
}
#endif
@@ -751,6 +771,7 @@ uint16_t tud_audio_int_ctr_n_write(uint8_t func_id, uint8_t const* buffer, uint1
return true;
}
#endif
@@ -952,32 +973,28 @@ static uint16_t audiod_encode_type_I_pcm(uint8_t rhport, audiod_function_t* audi
nBytesPerFFToSend = (nBytesPerFFToSend / nBytesToCopy) * nBytesToCopy;
// Encode
void * src;
void * src, * src_wrap;
uint8_t * dst;
uint8_t * src_end;
uint16_t len;
uint16_t len, len_wrap;
for (cnt_ff = 0; cnt_ff < n_ff_used; cnt_ff++)
{
dst = &audio->lin_buf_in[cnt_ff*audio->n_channels_per_ff_tx*audio->n_bytes_per_sampe_tx];
len = tu_fifo_get_linear_read_info(&audio->tx_supp_ff[cnt_ff], 0, &src, nBytesPerFFToSend);
tu_fifo_advance_read_pointer(&audio->tx_supp_ff[cnt_ff], len);
len = tu_fifo_get_linear_read_info(&audio->tx_supp_ff[cnt_ff], 0, nBytesPerFFToSend, &src, &len_wrap, &src_wrap);
src_end = src + len;
dst = audiod_interleaved_copy_bytes_fast_encode(nBytesToCopy, src, src_end, dst, n_ff_used);
// Handle wrapped part of FIFO
if (len < nBytesPerFFToSend)
if (len_wrap != 0)
{
len = tu_fifo_get_linear_read_info(&audio->tx_supp_ff[cnt_ff], 0, &src, nBytesPerFFToSend - len);
tu_fifo_advance_read_pointer(&audio->tx_supp_ff[cnt_ff], len);
src_end = src + len;
audiod_interleaved_copy_bytes_fast_encode(nBytesToCopy, src, src_end, dst, n_ff_used);
src_end = src_wrap + len_wrap;
audiod_interleaved_copy_bytes_fast_encode(nBytesToCopy, src_wrap, src_end, dst, n_ff_used);
}
tu_fifo_advance_read_pointer(&audio->tx_supp_ff[cnt_ff], len + len_wrap);
}
return nBytesPerFFToSend * n_ff_used;