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OpenAudio_ArduinoLibrary/AudioStream_F32.cpp

163 lines
4.7 KiB

#include "AudioStream_F32.h"
audio_block_f32_t * AudioStream_F32::f32_memory_pool;
uint32_t AudioStream_F32::f32_memory_pool_available_mask[6];
uint8_t AudioStream_F32::f32_memory_used = 0;
uint8_t AudioStream_F32::f32_memory_used_max = 0;
// Set up the pool of audio data blocks
// placing them all onto the free list
void AudioStream_F32::initialize_f32_memory(audio_block_f32_t *data, unsigned int num)
{
unsigned int i;
//Serial.println("AudioStream_F32 initialize_memory");
//delay(10);
if (num > 192) num = 192;
__disable_irq();
f32_memory_pool = data;
for (i=0; i < 6; i++) {
f32_memory_pool_available_mask[i] = 0;
}
for (i=0; i < num; i++) {
f32_memory_pool_available_mask[i >> 5] |= (1 << (i & 0x1F));
}
for (i=0; i < num; i++) {
data[i].memory_pool_index = i;
}
__enable_irq();
} // end initialize_memory
// Allocate 1 audio data block. If successful
// the caller is the only owner of this new block
audio_block_f32_t * AudioStream_F32::allocate_f32(void)
{
uint32_t n, index, avail;
uint32_t *p;
audio_block_f32_t *block;
uint8_t used;
p = f32_memory_pool_available_mask;
__disable_irq();
do {
avail = *p; if (avail) break;
p++; avail = *p; if (avail) break;
p++; avail = *p; if (avail) break;
p++; avail = *p; if (avail) break;
p++; avail = *p; if (avail) break;
p++; avail = *p; if (avail) break;
__enable_irq();
//Serial.println("alloc_f32:null");
return NULL;
} while (0);
n = __builtin_clz(avail);
*p = avail & ~(0x80000000 >> n);
used = f32_memory_used + 1;
f32_memory_used = used;
__enable_irq();
index = p - f32_memory_pool_available_mask;
block = f32_memory_pool + ((index << 5) + (31 - n));
block->ref_count = 1;
if (used > f32_memory_used_max) f32_memory_used_max = used;
//Serial.print("alloc_f32:");
//Serial.println((uint32_t)block, HEX);
return block;
}
// Release ownership of a data block. If no
// other streams have ownership, the block is
// returned to the free pool
void AudioStream_F32::release(audio_block_f32_t *block)
{
uint32_t mask = (0x80000000 >> (31 - (block->memory_pool_index & 0x1F)));
uint32_t index = block->memory_pool_index >> 5;
__disable_irq();
if (block->ref_count > 1) {
block->ref_count--;
} else {
//Serial.print("release_f32:");
//Serial.println((uint32_t)block, HEX);
f32_memory_pool_available_mask[index] |= mask;
f32_memory_used--;
}
__enable_irq();
}
// Transmit an audio data block
// to all streams that connect to an output. The block
// becomes owned by all the recepients, but also is still
// owned by this object. Normally, a block must be released
// by the caller after it's transmitted. This allows the
// caller to transmit to same block to more than 1 output,
// and then release it once after all transmit calls.
void AudioStream_F32::transmit(audio_block_f32_t *block, unsigned char index)
{
//Serial.print("AudioStream_F32: transmit(). start...index = ");Serial.println(index);
for (AudioConnection_F32 *c = destination_list_f32; c != NULL; c = c->next_dest) {
//Serial.print(" : loop1, c->src_index = ");Serial.println(c->src_index);
if (c->src_index == index) {
//Serial.println(" : if1");
if (c->dst.inputQueue_f32[c->dest_index] == NULL) {
//Serial.println(" : if2");
c->dst.inputQueue_f32[c->dest_index] = block;
block->ref_count++;
//Serial.print(" : block->ref_count = "); Serial.println(block->ref_count);
}
}
}
//Serial.println("AudioStream_F32: transmit(). finished.");
}
// Receive block from an input. The block's data
// may be shared with other streams, so it must not be written
audio_block_f32_t * AudioStream_F32::receiveReadOnly_f32(unsigned int index)
{
audio_block_f32_t *in;
if (index >= num_inputs_f32) return NULL;
in = inputQueue_f32[index];
inputQueue_f32[index] = NULL;
return in;
}
// Receive block from an input. The block will not
// be shared, so its contents may be changed.
audio_block_f32_t * AudioStream_F32::receiveWritable_f32(unsigned int index)
{
audio_block_f32_t *in, *p;
if (index >= num_inputs_f32) return NULL;
in = inputQueue_f32[index];
inputQueue_f32[index] = NULL;
if (in && in->ref_count > 1) {
p = allocate_f32();
if (p) memcpy(p->data, in->data, sizeof(p->data));
in->ref_count--;
in = p;
}
return in;
}
void AudioConnection_F32::connect(void) {
AudioConnection_F32 *p;
if (dest_index > dst.num_inputs_f32) return;
__disable_irq();
p = src.destination_list_f32;
if (p == NULL) {
src.destination_list_f32 = this;
} else {
while (p->next_dest) p = p->next_dest;
p->next_dest = this;
}
src.active = true;
dst.active = true;
__enable_irq();
}