static void process_audg(u8_t *pkt, int len) {
struct audg_packet *audg = (struct audg_packet *)pkt;
audg->gainL = unpackN(&audg->gainL);
audg->gainR = unpackN(&audg->gainR);
LOG_INFO("audg gainL: %u gainR: %u adjust: %u", audg->gainL, audg->gainR, audg->adjust);
LOCK_O;
output.gainL = audg->adjust ? audg->gainL : FIXED_ONE;
output.gainR = audg->adjust ? audg->gainR : FIXED_ONE;
UNLOCK_O;
}
static void process_cont(u8_t *pkt, int len) {
struct cont_packet *cont = (struct cont_packet *)pkt;
cont->metaint = unpackN(&cont->metaint);
LOG_INFO("cont metaint: %u loop: %u", cont->metaint, cont->loop);
if (autostart > 1) {
autostart -= 2;
LOCK_S;
if (stream.state == STREAMING_WAIT) {
stream.state = STREAMING_BUFFERING;
stream.meta_interval = stream.meta_next = cont->metaint;
}
UNLOCK_S;
wake_controller();
}
}
// read mp4 header to extract config data
static int read_mp4_header(unsigned long *samplerate_p, unsigned char *channels_p) {
size_t bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
char type[5];
u32_t len;
while (bytes >= 8) {
// count trak to find the first playable one
static unsigned trak, play;
u32_t consume;
len = unpackN((u32_t *)streambuf->readp);
memcpy(type, streambuf->readp + 4, 4);
type[4] = '\0';
if (!strcmp(type, "moov")) {
trak = 0;
play = 0;
}
if (!strcmp(type, "trak")) {
trak++;
}
// extract audio config from within esds and pass to DecInit2
if (!strcmp(type, "esds") && bytes > len) {
unsigned config_len;
u8_t *ptr = streambuf->readp + 12;
if (*ptr++ == 0x03) {
mp4_desc_length(&ptr);
ptr += 4;
} else {
ptr += 3;
}
mp4_desc_length(&ptr);
ptr += 13;
if (*ptr++ != 0x05) {
LOG_WARN("error parsing esds");
return -1;
}
config_len = mp4_desc_length(&ptr);
if (NEAAC(a, Init2, a->hAac, ptr, config_len, samplerate_p, channels_p) == 0) {
LOG_DEBUG("playable aac track: %u", trak);
play = trak;
}
}
// extract the total number of samples from stts
if (!strcmp(type, "stts") && bytes > len) {
u32_t i;
u8_t *ptr = streambuf->readp + 12;
u32_t entries = unpackN((u32_t *)ptr);
ptr += 4;
for (i = 0; i < entries; ++i) {
u32_t count = unpackN((u32_t *)ptr);
u32_t size = unpackN((u32_t *)(ptr + 4));
a->sttssamples += count * size;
ptr += 8;
}
LOG_DEBUG("total number of samples contained in stts: " FMT_u64, a->sttssamples);
}
// stash sample to chunk info, assume it comes before stco
if (!strcmp(type, "stsc") && bytes > len && !a->chunkinfo) {
a->stsc = malloc(len - 12);
if (a->stsc == NULL) {
LOG_WARN("malloc fail");
return -1;
}
memcpy(a->stsc, streambuf->readp + 12, len - 12);
}
// build offsets table from stco and stored stsc
if (!strcmp(type, "stco") && bytes > len && play == trak) {
u32_t i;
// extract chunk offsets
u8_t *ptr = streambuf->readp + 12;
u32_t entries = unpackN((u32_t *)ptr);
ptr += 4;
a->chunkinfo = malloc(sizeof(struct chunk_table) * (entries + 1));
if (a->chunkinfo == NULL) {
LOG_WARN("malloc fail");
return -1;
}
for (i = 0; i < entries; ++i) {
a->chunkinfo[i].offset = unpackN((u32_t *)ptr);
a->chunkinfo[i].sample = 0;
ptr += 4;
}
a->chunkinfo[i].sample = 0;
a->chunkinfo[i].offset = 0;
// fill in first sample id for each chunk from stored stsc
if (a->stsc) {
u32_t stsc_entries = unpackN((u32_t *)a->stsc);
u32_t sample = 0;
u32_t last = 0, last_samples = 0;
u8_t *ptr = (u8_t *)a->stsc + 4;
while (stsc_entries--) {
u32_t first = unpackN((u32_t *)ptr);
u32_t samples = unpackN((u32_t *)(ptr + 4));
if (last) {
for (i = last - 1; i < first - 1; ++i) {
a->chunkinfo[i].sample = sample;
sample += last_samples;
}
}
if (stsc_entries == 0) {
for (i = first - 1; i < entries; ++i) {
a->chunkinfo[i].sample = sample;
sample += samples;
}
}
last = first;
last_samples = samples;
ptr += 12;
}
free(a->stsc);
a->stsc = NULL;
}
}
// found media data, advance to start of first chunk and return
if (!strcmp(type, "mdat")) {
_buf_inc_readp(streambuf, 8);
a->pos += 8;
bytes -= 8;
if (play) {
LOG_DEBUG("type: mdat len: %u pos: %u", len, a->pos);
if (a->chunkinfo && a->chunkinfo[0].offset > a->pos) {
u32_t skip = a->chunkinfo[0].offset - a->pos;
LOG_DEBUG("skipping: %u", skip);
if (skip <= bytes) {
_buf_inc_readp(streambuf, skip);
a->pos += skip;
} else {
a->consume = skip;
}
}
a->sample = a->nextchunk = 1;
return 1;
} else {
LOG_DEBUG("type: mdat len: %u, no playable track found", len);
return -1;
}
}
// parse key-value atoms within ilst ---- entries to get encoder padding within iTunSMPB entry for gapless
if (!strcmp(type, "----") && bytes > len) {
u8_t *ptr = streambuf->readp + 8;
u32_t remain = len - 8, size;
if (!memcmp(ptr + 4, "mean", 4) && (size = unpackN((u32_t *)ptr)) < remain) {
ptr += size; remain -= size;
}
if (!memcmp(ptr + 4, "name", 4) && (size = unpackN((u32_t *)ptr)) < remain && !memcmp(ptr + 12, "iTunSMPB", 8)) {
ptr += size; remain -= size;
}
if (!memcmp(ptr + 4, "data", 4) && remain > 16 + 48) {
// data is stored as hex strings: 0 start end samples
u32_t b, c; u64_t d;
if (sscanf((const char *)(ptr + 16), "%x %x %x " FMT_x64, &b, &b, &c, &d) == 4) {
LOG_DEBUG("iTunSMPB start: %u end: %u samples: " FMT_u64, b, c, d);
if (a->sttssamples && a->sttssamples < b + c + d) {
LOG_DEBUG("reducing samples as stts count is less");
d = a->sttssamples - (b + c);
}
a->skip = b;
a->samples = d;
}
}
}
// default to consuming entire box
consume = len;
// read into these boxes so reduce consume
if (!strcmp(type, "moov") || !strcmp(type, "trak") || !strcmp(type, "mdia") || !strcmp(type, "minf") || !strcmp(type, "stbl") ||
!strcmp(type, "udta") || !strcmp(type, "ilst")) {
consume = 8;
}
// special cases which mix mix data in the enclosing box which we want to read into
if (!strcmp(type, "stsd")) consume = 16;
if (!strcmp(type, "mp4a")) consume = 36;
if (!strcmp(type, "meta")) consume = 12;
// consume rest of box if it has been parsed (all in the buffer) or is not one we want to parse
if (bytes >= consume) {
LOG_DEBUG("type: %s len: %u consume: %u", type, len, consume);
_buf_inc_readp(streambuf, consume);
a->pos += consume;
bytes -= consume;
} else if ( !(!strcmp(type, "esds") || !strcmp(type, "stts") || !strcmp(type, "stsc") ||
!strcmp(type, "stco") || !strcmp(type, "----")) ) {
LOG_DEBUG("type: %s len: %u consume: %u - partial consume: %u", type, len, consume, bytes);
_buf_inc_readp(streambuf, bytes);
a->pos += bytes;
a->consume = consume - bytes;
break;
} else {
break;
}
}
return 0;
}
static void process_strm(u8_t *pkt, int len) {
struct strm_packet *strm = (struct strm_packet *)pkt;
LOG_INFO("strm command %c", strm->command);
switch(strm->command) {
case 't':
sendSTAT("STMt", strm->replay_gain); // STMt replay_gain is no longer used to track latency, but support it
break;
case 'q':
output_flush();
status.frames_played = 0;
stream_disconnect();
sendSTAT("STMf", 0);
buf_flush(streambuf);
break;
case 'f':
output_flush();
status.frames_played = 0;
if (stream_disconnect()) {
sendSTAT("STMf", 0);
}
buf_flush(streambuf);
break;
case 'p':
{
unsigned interval = unpackN(&strm->replay_gain);
LOCK_O;
output.pause_frames = interval * status.current_sample_rate / 1000;
output.state = interval ? OUTPUT_PAUSE_FRAMES : OUTPUT_STOPPED;
UNLOCK_O;
if (!interval) sendSTAT("STMp", 0);
LOG_INFO("pause interval: %u", interval);
}
break;
case 'a':
{
unsigned interval = unpackN(&strm->replay_gain);
LOCK_O;
output.skip_frames = interval * status.current_sample_rate / 1000;
output.state = OUTPUT_SKIP_FRAMES;
UNLOCK_O;
LOG_INFO("skip ahead interval: %u", interval);
}
break;
case 'u':
{
unsigned jiffies = unpackN(&strm->replay_gain);
LOCK_O;
output.state = jiffies ? OUTPUT_START_AT : OUTPUT_RUNNING;
output.start_at = jiffies;
UNLOCK_O;
LOCK_D;
decode.state = DECODE_RUNNING;
UNLOCK_D;
LOG_INFO("unpause at: %u now: %u", jiffies, gettime_ms());
sendSTAT("STMr", 0);
}
break;
case 's':
{
unsigned header_len = len - sizeof(struct strm_packet);
char *header = (char *)(pkt + sizeof(struct strm_packet));
in_addr_t ip = (in_addr_t)strm->server_ip; // keep in network byte order
u16_t port = strm->server_port; // keep in network byte order
if (ip == 0) ip = slimproto_ip;
LOG_INFO("strm s autostart: %c transition period: %u transition type: %u",
strm->autostart, strm->transition_period, strm->transition_type - '0');
autostart = strm->autostart - '0';
sendSTAT("STMf", 0);
if (header_len > MAX_HEADER -1) {
LOG_WARN("header too long: %u", header_len);
break;
}
codec_open(strm->format, strm->pcm_sample_size, strm->pcm_sample_rate, strm->pcm_channels, strm->pcm_endianness);
if (ip == LOCAL_PLAYER_IP && port == LOCAL_PLAYER_PORT) {
// extension to slimproto for LocalPlayer - header is filename not http header, don't expect cont
stream_file(header, header_len, strm->threshold * 1024);
autostart -= 2;
} else {
stream_sock(ip, port, header, header_len, strm->threshold * 1024, autostart >= 2);
}
sendSTAT("STMc", 0);
sentSTMu = sentSTMo = sentSTMl = false;
LOCK_O;
output.threshold = strm->output_threshold;
output.next_replay_gain = unpackN(&strm->replay_gain);
output.fade_mode = strm->transition_type - '0';
output.fade_secs = strm->transition_period;
LOG_INFO("set fade mode: %u", output.fade_mode);
UNLOCK_O;
}
break;
default:
LOG_INFO("unhandled strm %c", strm->command);
break;
}
}
static int _read_header(void) {
unsigned bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
s32_t consume;
if (!d->type && bytes >= 4) {
if (!memcmp(streambuf->readp, "FRM8", 4)) {
d->type = DSDIFF;
} else if (!memcmp(streambuf->readp, "DSD ", 4)) {
d->type = DSF;
} else {
LOG_WARN("bad type");
return -1;
}
}
while (bytes >= 16) {
char id[5];
u64_t len = d->type == DSDIFF ? unpack64be(streambuf->readp + 4) : unpack64le(streambuf->readp + 4);
memcpy(id, streambuf->readp, 4);
id[4] = '\0';
consume = 0;
if (d->type == DSDIFF) {
if (!strcmp(id, "FRM8")) {
if (!memcmp(streambuf->readp + 12, "DSD ", 4)) {
consume = 16; // read into
} else {
LOG_WARN("bad dsdiff FRM8");
return -1;
}
}
if (!strcmp(id, "PROP") && !memcmp(streambuf->readp + 12, "SND ", 4)) {
consume = 16; // read into
}
if (!strcmp(id, "FVER")) {
LOG_INFO("DSDIFF version: %u.%u.%u.%u", *(streambuf->readp + 12), *(streambuf->readp + 13),
*(streambuf->readp + 14), *(streambuf->readp + 15));
}
if (!strcmp(id, "FS ")) {
d->sample_rate = unpackN((void *)(streambuf->readp + 12));
LOG_INFO("sample rate: %u", d->sample_rate);
}
if (!strcmp(id, "CHNL")) {
d->channels = unpackn((void *)(streambuf->readp + 12));
LOG_INFO("channels: %u", d->channels);
}
if (!strcmp(id, "DSD ")) {
LOG_INFO("found dsd len: " FMT_u64, len);
d->sample_bytes = len;
_buf_inc_readp(streambuf, 12);
bytes -= 12;
return 1; // got to the audio
}
}
if (d->type == DSF) {
if (!strcmp(id, "fmt ")) {
if (bytes >= len && bytes >= 52) {
u32_t version = unpack32le((void *)(streambuf->readp + 12));
u32_t format = unpack32le((void *)(streambuf->readp + 16));
LOG_INFO("DSF version: %u format: %u", version, format);
if (format != 0) {
LOG_WARN("only support DSD raw format");
return -1;
}
d->channels = unpack32le((void *)(streambuf->readp + 24));
d->sample_rate = unpack32le((void *)(streambuf->readp + 28));
d->lsb_first = (unpack32le((void *)(streambuf->readp + 32)) == 1);
d->sample_bytes = unpack64le((void *)(streambuf->readp + 36)) / 8;
d->block_size = unpack32le((void *)(streambuf->readp + 44));
LOG_INFO("channels: %u", d->channels);
LOG_INFO("sample rate: %u", d->sample_rate);
LOG_INFO("lsb first: %u", d->lsb_first);
LOG_INFO("sample bytes: " FMT_u64, d->sample_bytes);
LOG_INFO("block size: %u", d->block_size);
} else {
consume = -1; // come back later
}
}
if (!strcmp(id, "data")) {
LOG_INFO("found dsd len: " FMT_u64, len);
_buf_inc_readp(streambuf, 12);
bytes -= 12;
return 1; // got to the audio
}
}
// default to consuming whole chunk
if (!consume) {
consume = (s32_t)((d->type == DSDIFF) ? len + 12 : len);
}
if (bytes >= consume) {
LOG_DEBUG("id: %s len: " FMT_u64 " consume: %d", id, len, consume);
_buf_inc_readp(streambuf, consume);
bytes -= consume;
} else if (consume > 0) {
LOG_DEBUG("id: %s len: " FMT_u64 " consume: %d - partial consume: %u", id, len, consume, bytes);
_buf_inc_readp(streambuf, bytes);
d->consume = consume - bytes;
break;
} else {
break;
}
}
return 0;
}