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only one source buffer per client

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This commit is contained in:
Stephen Birarda 2013-01-31 15:15:23 -08:00
parent bddb09506f
commit e5b374c631
1 changed files with 29 additions and 37 deletions
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66
socket.cpp
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@ -23,14 +23,14 @@ const float SAMPLE_RATE = 22050.0;
const int SAMPLES_PER_PACKET = 512; const int SAMPLES_PER_PACKET = 512;
const float BUFFER_SEND_INTERVAL = (SAMPLES_PER_PACKET/SAMPLE_RATE) * 1000; const float BUFFER_SEND_INTERVAL = (SAMPLES_PER_PACKET/SAMPLE_RATE) * 1000;
const int16_t MAX_SAMPLE_VALUE = 32767; const int MAX_SAMPLE_VALUE = std::numeric_limits<int16_t>::max();
const int16_t MIN_SAMPLE_VALUE = -32767; const int MIN_SAMPLE_VALUE = std::numeric_limits<int16_t>::min();
const int NUM_SOURCE_BUFFERS = 10; const int MAX_SOURCE_BUFFERS = 10;
int16_t* wc_noise_buffer; int16_t* wc_noise_buffer;
#define ECHO_DEBUG_MODE 1 #define ECHO_DEBUG_MODE 0
sockaddr_in address, dest_address; sockaddr_in address, dest_address;
socklen_t destLength = sizeof(dest_address); socklen_t destLength = sizeof(dest_address);
@ -45,8 +45,8 @@ int num_agents = 0;
struct SourceBuffer { struct SourceBuffer {
int16_t sourceAudioData[BUFFER_LENGTH_SAMPLES]; int16_t sourceAudioData[BUFFER_LENGTH_SAMPLES];
bool available; bool transmitted;
} sourceBuffers[NUM_SOURCE_BUFFERS]; } sourceBuffers[MAX_SOURCE_BUFFERS];
double diffclock(timeval clock1,timeval clock2) double diffclock(timeval clock1,timeval clock2)
{ {
@ -85,7 +85,7 @@ int network_init()
return handle; return handle;
} }
int addAgent(sockaddr_in dest_address) { int addAgent(sockaddr_in dest_address, void *audioData) {
// Search for agent in list and add if needed // Search for agent in list and add if needed
int is_new = 0; int is_new = 0;
int i = 0; int i = 0;
@ -104,6 +104,9 @@ int addAgent(sockaddr_in dest_address) {
agents[i].agent_addr = dest_address; agents[i].agent_addr = dest_address;
agents[i].active = true; agents[i].active = true;
gettimeofday(&agents[i].time, NULL); gettimeofday(&agents[i].time, NULL);
memcpy(sourceBuffers[i].sourceAudioData, audioData, BUFFER_LENGTH_BYTES);
sourceBuffers[i].transmitted = false;
if (i == num_agents) { if (i == num_agents) {
num_agents++; num_agents++;
@ -154,36 +157,35 @@ void *send_buffer_thread(void *args)
sentBytes = 0; sentBytes = 0;
int sampleOffset = floor(diffclock(firstSend, now) * (SAMPLE_RATE / 1000) + 0.5); int sampleOffset = floor(diffclock(firstSend, now) * (SAMPLE_RATE / 1000) + 0.5);
// memcpy(clientMix, wc_noise_buffer + sampleOffset, BUFFER_LENGTH_BYTES); memcpy(clientMix, wc_noise_buffer + sampleOffset, BUFFER_LENGTH_BYTES);
memset(clientMix, 0, BUFFER_LENGTH_BYTES);
for (int b = 0; b < NUM_SOURCE_BUFFERS; b++) { for (int b = 0; b < MAX_SOURCE_BUFFERS; b++) {
if (!sourceBuffers[b].available) { if (!sourceBuffers[b].transmitted) {
for (int s = 0; s < BUFFER_LENGTH_SAMPLES; s++) { for (int s = 0; s < BUFFER_LENGTH_SAMPLES; s++) {
// we have source buffer data for this sample // we have source buffer data for this sample
int mixSample = clientMix[s] + sourceBuffers[b].sourceAudioData[s]; int mixSample = clientMix[s] + sourceBuffers[b].sourceAudioData[s];
if (mixSample >= MAX_SAMPLE_VALUE || mixSample <= MIN_SAMPLE_VALUE) { int sampleToAdd = std::max(mixSample, MIN_SAMPLE_VALUE);
std::cout << "Sample over at " << mixSample << ".\n"; sampleToAdd = std::min(sampleToAdd, MAX_SAMPLE_VALUE);
}
clientMix[s] += sourceBuffers[b].sourceAudioData[s]; clientMix[s] += sampleToAdd;
} }
sourceBuffers[b].available = true; sourceBuffers[b].transmitted = true;
} }
} }
for (int i = 0; i < num_agents; i++) { for (int i = 0; i < num_agents; i++) {
if (agents[i].active) { if (agents[i].active) {
sockaddr_in dest_address = agents[i].agent_addr; sockaddr_in dest_address = agents[i].agent_addr;
}
sentBytes = sendto(handle, clientMix, BUFFER_LENGTH_BYTES, sentBytes = sendto(handle, clientMix, BUFFER_LENGTH_BYTES,
0, (sockaddr *) &dest_address, sizeof(dest_address)); 0, (sockaddr *) &dest_address, sizeof(dest_address));
if (sentBytes < BUFFER_LENGTH_BYTES) { if (sentBytes < BUFFER_LENGTH_BYTES) {
std::cout << "Error sending mix packet! " << sentBytes << strerror(errno) << "\n"; std::cout << "Error sending mix packet! " << sentBytes << strerror(errno) << "\n";
}
} }
} }
} }
@ -202,21 +204,12 @@ void *process_client_packet(void *args)
sockaddr_in dest_address = process_args->dest_address; sockaddr_in dest_address = process_args->dest_address;
if (addAgent(dest_address)) { if (addAgent(dest_address, process_args->packet_data)) {
std::cout << "Added agent: " << std::cout << "Added agent: " <<
inet_ntoa(dest_address.sin_addr) << " on " << inet_ntoa(dest_address.sin_addr) << " on " <<
dest_address.sin_port << "\n"; dest_address.sin_port << "\n";
} }
for (int b = 0; b < NUM_SOURCE_BUFFERS; b++) {
if (sourceBuffers[b].available) {
memcpy(sourceBuffers[b].sourceAudioData, process_args->packet_data, BUFFER_LENGTH_BYTES);
sourceBuffers[b].available = false;
break;
}
}
pthread_exit(0); pthread_exit(0);
} }
@ -268,15 +261,14 @@ int main(int argc, const char * argv[])
return false; return false;
} }
// set source audio buffers availability to true
for (int b = 0; b < NUM_SOURCE_BUFFERS; b++) {
sourceBuffers[b].available = true;
}
gettimeofday(&last_agent_update, NULL); gettimeofday(&last_agent_update, NULL);
int16_t packet_data[BUFFER_LENGTH_SAMPLES]; int16_t packet_data[BUFFER_LENGTH_SAMPLES];
for (int b = 0; b < MAX_SOURCE_BUFFERS; b++) {
sourceBuffers[b].transmitted = true;
}
struct send_buffer_struct send_buffer_args; struct send_buffer_struct send_buffer_args;
send_buffer_args.socket_handle = handle; send_buffer_args.socket_handle = handle;