void StreamPacketsProc(void * inClientData,
UInt32 inNumberBytes,
UInt32 inNumberPackets,
const void * inInputData,
AudioStreamPacketDescription *inPacketDescriptions)
{
// this is called by audio file stream when it finds packets of audio
struct audioPlayer* player = (struct audioPlayer*)inClientData;
// the following code assumes we're streaming VBR data. for CBR data, you'd need another code branch here.
for (int i = 0; i < inNumberPackets; ++i) {
SInt64 packetOffset = inPacketDescriptions[i].mStartOffset;
SInt64 packetSize = inPacketDescriptions[i].mDataByteSize;
player->processedPacketsSize += packetSize;
player->processedPacketCount += 1;
// if the space remaining in the buffer is not enough for this packet, then enqueue the buffer.
size_t bufSpaceRemaining = kAQBufSize - player->bytesFilled;
if (bufSpaceRemaining < packetSize) {
EnqueueBuffer(player);
WaitForFreeBuffer(player);
}
// copy data to the audio queue buffer
AudioQueueBufferRef fillBuf = player->audioQueueBuffer[player->fillBufferIndex];
memcpy((char*)fillBuf->mAudioData + player->bytesFilled, (const char*)inInputData + packetOffset, packetSize);
// fill out packet description
player->packetDescs[player->packetsFilled] = inPacketDescriptions[i];
player->packetDescs[player->packetsFilled].mStartOffset = player->bytesFilled;
// keep track of bytes filled and packets filled
player->bytesFilled += packetSize;
player->packetsFilled += 1;
player->dSongPlayed += player->packetDuration * 1000.0f;
player->songPlayed = (unsigned long int)player->dSongPlayed;
// if that was the last free packet description, then enqueue the buffer.
size_t packetsDescsRemaining = kAQMaxPacketDescs - player->packetsFilled;
if (packetsDescsRemaining == 0) {
EnqueueBuffer(player);
WaitForFreeBuffer(player);
}
}
}
void MyPacketsProc( void * inClientData,
UInt32 inNumberBytes,
UInt32 inNumberPackets,
const void * inInputData,
AudioStreamPacketDescription *inPacketDescriptions)
{
// this is called by audio file stream when it finds packets of audio
MyData* myData = (MyData*)inClientData;
printf("got data. bytes: %d packets: %d\n", inNumberBytes, inNumberPackets);
// the following code assumes we're streaming VBR data. for CBR data, you'd need another code branch here.
for (int i = 0; i < inNumberPackets; ++i) {
SInt64 packetOffset = inPacketDescriptions[i].mStartOffset;
SInt64 packetSize = inPacketDescriptions[i].mDataByteSize;
// if the space remaining in the buffer is not enough for this packet, then enqueue the buffer.
size_t bufSpaceRemaining = kAQBufSize - myData->bytesFilled;
if (bufSpaceRemaining < packetSize) {
MyEnqueueBuffer(myData);
WaitForFreeBuffer(myData);
}
// copy data to the audio queue buffer
AudioQueueBufferRef fillBuf = myData->audioQueueBuffer[myData->fillBufferIndex];
memcpy((char*)fillBuf->mAudioData + myData->bytesFilled, (const char*)inInputData + packetOffset, packetSize);
// fill out packet description
myData->packetDescs[myData->packetsFilled] = inPacketDescriptions[i];
myData->packetDescs[myData->packetsFilled].mStartOffset = myData->bytesFilled;
// keep track of bytes filled and packets filled
myData->bytesFilled += packetSize;
myData->packetsFilled += 1;
// if that was the last free packet description, then enqueue the buffer.
size_t packetsDescsRemaining = kAQMaxPacketDescs - myData->packetsFilled;
if (packetsDescsRemaining == 0) {
MyEnqueueBuffer(myData);
WaitForFreeBuffer(myData);
}
}
}
