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Added LPCM support to .wav output

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This commit is contained in:
Thulinma 2017-06-15 22:25:37 +02:00
parent f46d2a0c4a
commit 187ef6138c
1 changed files with 41 additions and 4 deletions
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45
src/output/output_wav.cpp
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@ -40,6 +40,7 @@ namespace Mist{
capa["url_match"] = "/$.wav";
capa["codecs"][0u][0u].append("ALAW");
capa["codecs"][0u][0u].append("MP3");
capa["codecs"][0u][0u].append("PCM");
capa["methods"][0u]["handler"] = "http";
capa["methods"][0u]["type"] = "html5/audio/wav";
capa["methods"][0u]["priority"] = 1ll;
@ -59,6 +60,39 @@ namespace Mist{
char *dataPointer = 0;
unsigned int len = 0;
thisPacket.getString("data", dataPointer, len);
//PCM must be converted to little-endian if > 8 bits per sample
static char * swappyPointer = 0;
static uint32_t swappySize = 0;
DTSC::Track & trk = myMeta.tracks[thisPacket.getTrackId()];
if (trk.codec == "PCM"){
if (trk.size > 8){
if (swappySize < len){
char * tmp = (char*)realloc(swappyPointer, len);
if (!tmp){
FAIL_MSG("Could not allocate data for PCM endianness swap!");
return;
}
swappyPointer = tmp;
swappySize = len;
}
}
if (trk.size == 16){
for (uint32_t i = 0; i < len; i+=2){
swappyPointer[i] = dataPointer[i+1];
swappyPointer[i+1] = dataPointer[i];
}
}
if (trk.size == 24){
for (uint32_t i = 0; i < len; i+=3){
swappyPointer[i] = dataPointer[i+2];
swappyPointer[i+1] = dataPointer[i+1];
swappyPointer[i+2] = dataPointer[i];
}
}
dataPointer = swappyPointer;
}
myConn.SendNow(dataPointer, len);
}
@ -88,14 +122,17 @@ namespace Mist{
// Send format details
uint16_t fmt = 0;
if (Trk.codec == "ALAW"){fmt = 6;}
if (Trk.codec == "PCM"){fmt = 1;}
if (Trk.codec == "MP3"){fmt = 85;}
myConn.SendNow(RIFF::fmt::generate(fmt, Trk.channels, Trk.rate, Trk.bps,
Trk.channels * (Trk.size << 3), Trk.size));
// Send sample count per channel
if (!myMeta.live){
myConn.SendNow(RIFF::fact::generate(((Trk.lastms - Trk.firstms) * Trk.rate) / 1000));
}else{
myConn.SendNow(RIFF::fact::generate(0xFFFFFFFFul));
if (fmt != 1){//Not required for PCM
if (!myMeta.live){
myConn.SendNow(RIFF::fact::generate(((Trk.lastms - Trk.firstms) * Trk.rate) / 1000));
}else{
myConn.SendNow(RIFF::fact::generate(0xFFFFFFFFul));
}
}
// Send MistServer identifier
myConn.SendNow("LIST\026\000\000\000infoISFT\012\000\000\000MistServer", 30);