// called with mutex locked within vorbis_decode to avoid locking O before S
static size_t _read_cb(void *ptr, size_t size, size_t nmemb, void *datasource) {
size_t bytes;
bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
bytes = min(bytes, size * nmemb);
memcpy(ptr, streambuf->readp, bytes);
_buf_inc_readp(streambuf, bytes);
return bytes / size;
}
/*---------------------------------------------------------------------------*/
void _output_inc_readp(struct thread_ctx_s *ctx, unsigned by) {
if (ctx->output.icy.count) ctx->output.icy.count -= by;
else {
if (ctx->output.thru) _buf_inc_readp(ctx->outputbuf, by);
else _buf_inc_readp(ctx->encodebuf, by);
// check if time to insert ICY metadata
if (!ctx->output.icy.interval) return;
ctx->output.icy.remain -= by;
if (!ctx->output.icy.remain) {
struct outputstate *out = &ctx->output;
int len_16 = 0;
if (ctx->output.icy.updated) {
// there is room for 1 extra byte at the beginning for length
#if ICY_ARTWORK
len_16 = sprintf(out->icy.buffer, "NStreamTitle='%s - %s';StreamURL='%s';",
out->icy.artist, out->icy.title, out->icy.artwork) - 1;
LOG_INFO("[%p]: ICY update\n\t%s\n\t%s\n\t%s", ctx, out->icy.artist, out->icy.title, out->icy.artwork);
#else
len_16 = sprintf(out->icy.buffer, "NStreamTitle='%s - %s'",
out->icy.artist, out->icy.title) - 1;
LOG_INFO("[%p]: ICY update\n\t%s\n\t%s", ctx, out->icy.artist, out->icy.title);
#endif
len_16 = (len_16 + 15) / 16;
}
out->icy.buffer[0] = len_16;
out->icy.size = out->icy.count = len_16 * 16 + 1;
out->icy.remain = out->icy.interval;
out->icy.updated = false;
}
}
}
static FLAC__StreamDecoderReadStatus read_cb(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *want, void *client_data) {
size_t bytes;
bool end;
LOCK_S;
bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
bytes = min(bytes, *want);
end = (stream.state <= DISCONNECT && bytes == 0);
memcpy(buffer, streambuf->readp, bytes);
_buf_inc_readp(streambuf, bytes);
UNLOCK_S;
*want = bytes;
return end ? FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM : FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
}
static decode_state faad_decode(void) {
size_t bytes_total;
size_t bytes_wrap;
NeAACDecFrameInfo info;
s32_t *iptr;
bool endstream;
frames_t frames;
LOCK_S;
bytes_total = _buf_used(streambuf);
bytes_wrap = min(bytes_total, _buf_cont_read(streambuf));
if (stream.state <= DISCONNECT && !bytes_total) {
UNLOCK_S;
return DECODE_COMPLETE;
}
if (a->consume) {
u32_t consume = min(a->consume, bytes_wrap);
LOG_DEBUG("consume: %u of %u", consume, a->consume);
_buf_inc_readp(streambuf, consume);
a->pos += consume;
a->consume -= consume;
UNLOCK_S;
return DECODE_RUNNING;
}
if (decode.new_stream) {
int found = 0;
static unsigned char channels;
static unsigned long samplerate;
if (a->type == '2') {
// adts stream - seek for header
while (bytes_wrap >= 2 && (*(streambuf->readp) != 0xFF || (*(streambuf->readp + 1) & 0xF6) != 0xF0)) {
_buf_inc_readp(streambuf, 1);
bytes_total--;
bytes_wrap--;
}
if (bytes_wrap >= 2) {
long n = NEAAC(a, Init, a->hAac, streambuf->readp, bytes_wrap, &samplerate, &channels);
if (n < 0) {
found = -1;
} else {
_buf_inc_readp(streambuf, n);
found = 1;
}
}
} else {
// mp4 - read header
found = read_mp4_header(&samplerate, &channels);
}
if (found == 1) {
LOG_INFO("samplerate: %u channels: %u", samplerate, channels);
bytes_total = _buf_used(streambuf);
bytes_wrap = min(bytes_total, _buf_cont_read(streambuf));
LOCK_O;
LOG_INFO("setting track_start");
output.next_sample_rate = decode_newstream(samplerate, output.supported_rates);
IF_DSD( output.next_dop = false; )
// 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;
}
frames_t _output_frames(frames_t avail) {
frames_t frames, size;
bool silence;
s32_t cross_gain_in = 0, cross_gain_out = 0; s32_t *cross_ptr = NULL;
s32_t gainL = output.current_replay_gain ? gain(output.gainL, output.current_replay_gain) : output.gainL;
s32_t gainR = output.current_replay_gain ? gain(output.gainR, output.current_replay_gain) : output.gainR;
if (output.invert) { gainL = -gainL; gainR = -gainR; }
frames = _buf_used(outputbuf) / BYTES_PER_FRAME;
silence = false;
// start when threshold met
if (output.state == OUTPUT_BUFFER && frames > output.threshold * output.next_sample_rate / 100 && frames > output.start_frames) {
output.state = OUTPUT_RUNNING;
LOG_INFO("start buffer frames: %u", frames);
wake_controller();
}
// skip ahead - consume outputbuf but play nothing
if (output.state == OUTPUT_SKIP_FRAMES) {
if (frames > 0) {
frames_t skip = min(frames, output.skip_frames);
LOG_INFO("skip %u of %u frames", skip, output.skip_frames);
frames -= skip;
output.frames_played += skip;
while (skip > 0) {
frames_t cont_frames = min(skip, _buf_cont_read(outputbuf) / BYTES_PER_FRAME);
skip -= cont_frames;
_buf_inc_readp(outputbuf, cont_frames * BYTES_PER_FRAME);
}
}
output.state = OUTPUT_RUNNING;
}
// pause frames - play silence for required frames
if (output.state == OUTPUT_PAUSE_FRAMES) {
LOG_INFO("pause %u frames", output.pause_frames);
if (output.pause_frames == 0) {
output.state = OUTPUT_RUNNING;
} else {
silence = true;
frames = min(avail, output.pause_frames);
frames = min(frames, MAX_SILENCE_FRAMES);
output.pause_frames -= frames;
}
}
// start at - play silence until jiffies reached
if (output.state == OUTPUT_START_AT) {
u32_t now = gettime_ms();
if (now >= output.start_at || output.start_at > now + 10000) {
output.state = OUTPUT_RUNNING;
} else {
u32_t delta_frames = (output.start_at - now) * output.current_sample_rate / 1000;
silence = true;
frames = min(avail, delta_frames);
frames = min(frames, MAX_SILENCE_FRAMES);
}
}
// play silence if buffering or no frames
if (output.state <= OUTPUT_BUFFER || frames == 0) {
silence = true;
frames = min(avail, MAX_SILENCE_FRAMES);
}
LOG_SDEBUG("avail: %d frames: %d silence: %d", avail, frames, silence);
frames = min(frames, avail);
size = frames;
while (size > 0) {
frames_t out_frames;
frames_t cont_frames = _buf_cont_read(outputbuf) / BYTES_PER_FRAME;
int wrote;
if (output.track_start && !silence) {
if (output.track_start == outputbuf->readp) {
unsigned delay = 0;
if (output.current_sample_rate != output.next_sample_rate) {
delay = output.rate_delay;
}
IF_DSD(
if (output.dop != output.next_dop) {
delay = output.dop_delay;
}
)
frames -= size;
// add silence delay in two halves, before and after track start on rate or pcm-dop change
if (delay) {
output.state = OUTPUT_PAUSE_FRAMES;
if (!output.delay_active) {
output.pause_frames = output.current_sample_rate * delay / 2000;
output.delay_active = true; // first delay - don't process track start
break;
} else {
output.pause_frames = output.next_sample_rate * delay / 2000;
output.delay_active = false; // second delay - process track start
}
}
LOG_INFO("track start sample rate: %u replay_gain: %u", output.next_sample_rate, output.next_replay_gain);
output.frames_played = 0;
output.track_started = true;
output.track_start_time = gettime_ms();
output.current_sample_rate = output.next_sample_rate;
IF_DSD(
output.dop = output.next_dop;
)
if (output.fade != FADE_ACTIVE || output.fade_mode != FADE_CROSSFADE) {
output.current_replay_gain = output.next_replay_gain;
}
output.track_start = NULL;
break;
} else if (output.track_start > outputbuf->readp) {
void _check_header(void) {
u8_t *ptr = streambuf->readp;
unsigned bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
header_format format = UNKNOWN;
// simple parsing of wav and aiff headers and get to samples
if (bytes > 12) {
if (!memcmp(ptr, "RIFF", 4) && !memcmp(ptr+8, "WAVE", 4)) {
LOG_INFO("WAVE");
format = WAVE;
} else if (!memcmp(ptr, "FORM", 4) && (!memcmp(ptr+8, "AIFF", 4) || !memcmp(ptr+8, "AIFC", 4))) {
LOG_INFO("AIFF");
format = AIFF;
}
}
if (format != UNKNOWN) {
ptr += 12;
bytes -= 12;
while (bytes >= 8) {
char id[5];
unsigned len;
memcpy(id, ptr, 4);
id[4] = '\0';
if (format == WAVE) {
len = *(ptr+4) | *(ptr+5) << 8 | *(ptr+6) << 16| *(ptr+7) << 24;
} else {
len = *(ptr+4) << 24 | *(ptr+5) << 16 | *(ptr+6) << 8 | *(ptr+7);
}
LOG_INFO("header: %s len: %d", id, len);
if (format == WAVE && !memcmp(ptr, "data", 4)) {
ptr += 8;
_buf_inc_readp(streambuf, ptr - streambuf->readp);
audio_left = len;
LOG_INFO("audio size: %u", audio_left);
limit = true;
return;
}
if (format == AIFF && !memcmp(ptr, "SSND", 4) && bytes >= 16) {
unsigned offset = *(ptr+8) << 24 | *(ptr+9) << 16 | *(ptr+10) << 8 | *(ptr+11);
// following 4 bytes is blocksize - ignored
ptr += 8 + 8;
_buf_inc_readp(streambuf, ptr + offset - streambuf->readp);
audio_left = len - 8 - offset;
LOG_INFO("audio size: %u", audio_left);
limit = true;
return;
}
if (format == WAVE && !memcmp(ptr, "fmt ", 4) && bytes >= 24) {
// override the server parsed values with our own
channels = *(ptr+10) | *(ptr+11) << 8;
sample_rate = *(ptr+12) | *(ptr+13) << 8 | *(ptr+14) << 16 | *(ptr+15) << 24;
sample_size = (*(ptr+22) | *(ptr+23) << 8) / 8;
bigendian = 0;
LOG_INFO("pcm size: %u rate: %u chan: %u bigendian: %u", sample_size, sample_rate, channels, bigendian);
}
if (format == AIFF && !memcmp(ptr, "COMM", 4) && bytes >= 26) {
int exponent;
// override the server parsed values with our own
channels = *(ptr+8) << 8 | *(ptr+9);
sample_size = (*(ptr+14) << 8 | *(ptr+15)) / 8;
bigendian = 1;
// sample rate is encoded as IEEE 80 bit extended format
// make some assumptions to simplify processing - only use first 32 bits of mantissa
exponent = ((*(ptr+16) & 0x7f) << 8 | *(ptr+17)) - 16383 - 31;
sample_rate = *(ptr+18) << 24 | *(ptr+19) << 16 | *(ptr+20) << 8 | *(ptr+21);
while (exponent < 0) { sample_rate >>= 1; ++exponent; }
while (exponent > 0) { sample_rate <<= 1; --exponent; }
LOG_INFO("pcm size: %u rate: %u chan: %u bigendian: %u", sample_size, sample_rate, channels, bigendian);
}
if (bytes >= len + 8) {
ptr += len + 8;
bytes -= (len + 8);
} else {
LOG_WARN("run out of data");
return;
}
}
static decode_state mpg_decode(void) {
size_t bytes, space, size;
int ret;
LOCK_S;
LOCK_O;
bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
space = min(_buf_space(outputbuf), _buf_cont_write(outputbuf));
bytes = min(bytes, READ_SIZE);
space = min(space, WRITE_SIZE);
if (stream.state <= DISCONNECT && bytes == 0) {
UNLOCK_O;
UNLOCK_S;
return DECODE_COMPLETE;
}
if (m->use16bit) {
space = (space / BYTES_PER_FRAME) * 4;
}
ret = m->mpg123_decode(m->h, streambuf->readp, bytes, outputbuf->writep, space, &size);
if (ret == MPG123_NEW_FORMAT) {
if (decode.new_stream) {
long rate;
int channels, enc;
m->mpg123_getformat(m->h, &rate, &channels, &enc);
LOG_INFO("setting track_start");
output.next_sample_rate = rate;
output.track_start = outputbuf->writep;
if (output.fade_mode) _checkfade(true);
decode.new_stream = false;
} else {
LOG_WARN("format change mid stream - not supported");
}
}
// expand 16bit output to 32bit samples
if (m->use16bit) {
s16_t *iptr;
s32_t *optr;
size_t count = size / 2;
size = count * 4;
iptr = (s16_t *)outputbuf->writep + count;
optr = (s32_t *)outputbuf->writep + count;
while (count--) {
*--optr = *--iptr << 16;
}
}
_buf_inc_readp(streambuf, bytes);
_buf_inc_writep(outputbuf, size);
UNLOCK_O;
UNLOCK_S;
LOG_SDEBUG("write %u frames", size / BYTES_PER_FRAME);
if (ret == MPG123_DONE) {
LOG_INFO("stream complete");
return DECODE_COMPLETE;
}
if (ret == MPG123_ERR) {
LOG_WARN("Error");
return DECODE_COMPLETE;
}
// OK and NEED_MORE keep running
return DECODE_RUNNING;
}
static decode_state faad_decode(void) {
size_t bytes_total;
size_t bytes_wrap;
NeAACDecFrameInfo info;
s32_t *iptr;
bool endstream;
frames_t frames;
LOCK_S;
bytes_total = _buf_used(streambuf);
bytes_wrap = min(bytes_total, _buf_cont_read(streambuf));
if (stream.state <= DISCONNECT && !bytes_total) {
UNLOCK_S;
return DECODE_COMPLETE;
}
if (a->consume) {
u32_t consume = min(a->consume, bytes_wrap);
LOG_DEBUG("consume: %u of %u", consume, a->consume);
_buf_inc_readp(streambuf, consume);
a->pos += consume;
a->consume -= consume;
UNLOCK_S;
return DECODE_RUNNING;
}
if (decode.new_stream) {
int found = 0;
static unsigned char channels;
static unsigned long samplerate;
if (a->type == '2') {
// adts stream - seek for header
while (bytes_wrap >= 2 && (*(streambuf->readp) != 0xFF || (*(streambuf->readp + 1) & 0xF6) != 0xF0)) {
_buf_inc_readp(streambuf, 1);
bytes_total--;
bytes_wrap--;
}
if (bytes_wrap >= 2) {
long n = NEAAC(a, Init, a->hAac, streambuf->readp, bytes_wrap, &samplerate, &channels);
if (n < 0) {
found = -1;
} else {
_buf_inc_readp(streambuf, n);
found = 1;
}
}
} else {
// mp4 - read header
found = read_mp4_header(&samplerate, &channels);
}
if (found == 1) {
LOG_INFO("samplerate: %u channels: %u", samplerate, channels);
bytes_total = _buf_used(streambuf);
bytes_wrap = min(bytes_total, _buf_cont_read(streambuf));
LOCK_O;
LOG_INFO("setting track_start");
output.next_sample_rate = decode_newstream(samplerate, output.max_sample_rate);
output.track_start = outputbuf->writep;
if (output.fade_mode) _checkfade(true);
decode.new_stream = false;
UNLOCK_O;
} else if (found == -1) {
LOG_WARN("error reading stream header");
UNLOCK_S;
return DECODE_ERROR;
} else {
// not finished header parsing come back next time
UNLOCK_S;
return DECODE_RUNNING;
}
}
if (bytes_wrap < WRAPBUF_LEN && bytes_total > WRAPBUF_LEN) {
// make a local copy of frames which may have wrapped round the end of streambuf
u8_t buf[WRAPBUF_LEN];
memcpy(buf, streambuf->readp, bytes_wrap);
memcpy(buf + bytes_wrap, streambuf->buf, WRAPBUF_LEN - bytes_wrap);
iptr = NEAAC(a, Decode, a->hAac, &info, buf, WRAPBUF_LEN);
} else {
iptr = NEAAC(a, Decode, a->hAac, &info, streambuf->readp, bytes_wrap);
}
if (info.error) {
LOG_WARN("error: %u %s", info.error, NEAAC(a, GetErrorMessage, info.error));
}
endstream = false;
// mp4 end of chunk - skip to next offset
if (a->chunkinfo && a->chunkinfo[a->nextchunk].offset && a->sample++ == a->chunkinfo[a->nextchunk].sample) {
if (a->chunkinfo[a->nextchunk].offset > a->pos) {
u32_t skip = a->chunkinfo[a->nextchunk].offset - a->pos;
if (skip != info.bytesconsumed) {
LOG_DEBUG("skipping to next chunk pos: %u consumed: %u != skip: %u", a->pos, info.bytesconsumed, skip);
}
if (bytes_total >= skip) {
_buf_inc_readp(streambuf, skip);
a->pos += skip;
} else {
a->consume = skip;
}
a->nextchunk++;
} else {
LOG_ERROR("error: need to skip backwards!");
endstream = true;
}
// adts and mp4 when not at end of chunk
} else if (info.bytesconsumed != 0) {
_buf_inc_readp(streambuf, info.bytesconsumed);
a->pos += info.bytesconsumed;
// error which doesn't advance streambuf - end
} else {
endstream = true;
}
UNLOCK_S;
if (endstream) {
LOG_WARN("unable to decode further");
return DECODE_ERROR;
}
if (!info.samples) {
a->empty = true;
return DECODE_RUNNING;
}
frames = info.samples / info.channels;
if (a->skip) {
u32_t skip;
if (a->empty) {
a->empty = false;
a->skip -= frames;
LOG_DEBUG("gapless: first frame empty, skipped %u frames at start", frames);
}
skip = min(frames, a->skip);
LOG_DEBUG("gapless: skipping %u frames at start", skip);
frames -= skip;
a->skip -= skip;
iptr += skip * info.channels;
}
if (a->samples) {
if (a->samples < frames) {
LOG_DEBUG("gapless: trimming %u frames from end", frames - a->samples);
frames = (frames_t)a->samples;
}
a->samples -= frames;
}
LOG_SDEBUG("write %u frames", frames);
LOCK_O_direct;
while (frames > 0) {
frames_t f;
frames_t count;
s32_t *optr;
IF_DIRECT(
f = _buf_cont_write(outputbuf) / BYTES_PER_FRAME;
optr = (s32_t *)outputbuf->writep;
);
IF_PROCESS(
f = process.max_in_frames;
optr = (s32_t *)process.inbuf;
);
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;
}
static int _read_data(void *opaque, u8_t *buffer, int buf_size) {
size_t bytes;
LOCK_S;
bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
ff->end_of_stream = (stream.state <= DISCONNECT && bytes == 0);
bytes = min(bytes, buf_size);
// for chunked wma extract asf header and data frames from framing structure
// pad asf data frames to size of packet extracted from asf header
if (ff->wma_mmsh) {
unsigned chunk_type = 0, chunk_len = 0;
if (ff->mmsh_bytes_left) {
// bytes remaining from previous frame
if (bytes >= ff->mmsh_bytes_left) {
bytes = ff->mmsh_bytes_left;
ff->mmsh_bytes_left = 0;
} else {
ff->mmsh_bytes_left -= bytes;
}
} else if (ff->mmsh_bytes_pad) {
// add padding for previous frame
bytes = min(ff->mmsh_bytes_pad, buf_size);
memset(buffer, 0, bytes);
ff->mmsh_bytes_pad -= bytes;
UNLOCK_S;
return bytes;
} else if (bytes >= 12) {
// new chunk header
chunk_type = (*(streambuf->readp) & 0x7f) | *(streambuf->readp + 1) << 8;
chunk_len = *(streambuf->readp + 2) | *(streambuf->readp + 3) << 8;
_buf_inc_readp(streambuf, 12);
bytes -= 12;
} else if (_buf_used(streambuf) >= 12) {
// new chunk header split over end of streambuf, read in two
u8_t header[12];
memcpy(header, streambuf->readp, bytes);
_buf_inc_readp(streambuf, bytes);
memcpy(header + bytes, streambuf->readp, 12 - bytes);
_buf_inc_readp(streambuf, 12 - bytes);
chunk_type = (header[0] & 0x7f) | header[1] << 8;
chunk_len = header[2] | header[3] << 8;
bytes = min(_buf_used(streambuf), _buf_cont_read(streambuf));
bytes = min(bytes, buf_size);
} else {
// should not get here...
LOG_ERROR("chunk parser stalled bytes: %u %u", bytes, _buf_used(streambuf));
UNLOCK_S;
return 0;
}
if (chunk_type && chunk_len) {
if (chunk_type == 0x4824) {
// asf header - parse packet length
ff->mmsh_packet_len = _parse_packlen();
ff->mmsh_bytes_pad = 0;
} else if (chunk_type == 0x4424 && ff->mmsh_packet_len) {
// asf data packet - add padding
ff->mmsh_bytes_pad = ff->mmsh_packet_len - chunk_len + 8;
} else {
LOG_INFO("unknown chunk: %04x", chunk_type);
// other packet - no padding
ff->mmsh_bytes_pad = 0;
}
if (chunk_len - 8 <= bytes) {
bytes = chunk_len - 8;
ff->mmsh_bytes_left = 0;
} else {
ff->mmsh_bytes_left = chunk_len - 8 - bytes;
}
}
}
memcpy(buffer, streambuf->readp, bytes);
_buf_inc_readp(streambuf, bytes);
if (ff->mmsh_bytes_pad && bytes + ff->mmsh_bytes_pad < buf_size) {
memset(buffer + bytes, 0, ff->mmsh_bytes_pad);
bytes += ff->mmsh_bytes_pad;
ff->mmsh_bytes_pad = 0;
}
UNLOCK_S;
return bytes;
}