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bring ogg parsing context purely inside stream.c - release

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This commit is contained in:
philippe44
2024-01-02 18:15:39 -08:00
parent 58840f894f
commit 8e3d91020f
2 changed files with 57 additions and 56 deletions
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14
components/squeezelite/squeezelite.h
View File

@@ -580,20 +580,6 @@ struct streamstate {
u32_t meta_next;
u32_t meta_left;
bool meta_send;
struct {
enum { STREAM_OGG_OFF, STREAM_OGG_SYNC, STREAM_OGG_HEADER, STREAM_OGG_SEGMENTS, STREAM_OGG_PAGE } state;
u32_t want, miss, match;
u8_t* data, segments[255];
#pragma pack(push, 1)
struct {
char pattern[4];
u8_t version, type;
u64_t granule;
u32_t serial, page, checksum;
u8_t count;
} header;
} ogg;
#pragma pack(pop)
};
void stream_init(log_level level, unsigned stream_buf_size);

99
components/squeezelite/stream.c
View File

@@ -61,6 +61,21 @@ static sockfd fd;
struct EXT_RAM_ATTR streamstate stream;
static EXT_RAM_ATTR struct {
enum { OGG_OFF, OGG_SYNC, OGG_HEADER, OGG_SEGMENTS, OGG_PAGE } state;
u32_t want, miss, match;
u8_t* data, segments[255];
#pragma pack(push, 1)
struct {
char pattern[4];
u8_t version, type;
u64_t granule;
u32_t serial, page, checksum;
u8_t count;
} header;
#pragma pack(pop)
} ogg;
#if USE_SSL
static SSL_CTX *SSLctx;
SSL *ssl;
@@ -148,8 +163,8 @@ static bool running = true;
static void _disconnect(stream_state state, disconnect_code disconnect) {
stream.state = state;
stream.disconnect = disconnect;
if (stream.ogg.state == STREAM_OGG_PAGE && stream.ogg.data) free(stream.ogg.data);
stream.ogg.data = NULL;
if (ogg.state == OGG_PAGE && ogg.data) free(ogg.data);
ogg.data = NULL;
#if USE_SSL
if (ssl) {
SSL_shutdown(ssl);
@@ -169,74 +184,74 @@ static u32_t memfind(const u8_t* haystack, u32_t n, const char* needle, u32_t le
}
static void stream_ogg(size_t n) {
if (stream.ogg.state == STREAM_OGG_OFF) return;
if (ogg.state == OGG_OFF) return;
u8_t* p = streambuf->writep;
while (n) {
size_t consumed = min(stream.ogg.miss, n);
size_t consumed = min(ogg.miss, n);
// copy as many bytes as possible and come back later if we do'nt have enough
if (stream.ogg.data) {
memcpy(stream.ogg.data + stream.ogg.want - stream.ogg.miss, p, consumed);
stream.ogg.miss -= consumed;
if (stream.ogg.miss) return;
if (ogg.data) {
memcpy(ogg.data + ogg.want - ogg.miss, p, consumed);
ogg.miss -= consumed;
if (ogg.miss) return;
}
// we have what we want, let's parse
switch (stream.ogg.state) {
case STREAM_OGG_SYNC: {
stream.ogg.miss -= consumed;
switch (ogg.state) {
case OGG_SYNC: {
ogg.miss -= consumed;
if (consumed) break;
// we have to memorize position in case any of last 3 bytes match...
int pos = memfind(p, n, "OggS", 4, &stream.ogg.match);
if (stream.ogg.match == 4) {
consumed = pos - stream.ogg.match;
stream.ogg.state = STREAM_OGG_HEADER;
stream.ogg.miss = stream.ogg.want = sizeof(stream.ogg.header);
stream.ogg.data = (u8_t*) &stream.ogg.header;
stream.ogg.match = 0;
int pos = memfind(p, n, "OggS", 4, &ogg.match);
if (ogg.match == 4) {
consumed = pos - ogg.match;
ogg.state = OGG_HEADER;
ogg.miss = ogg.want = sizeof(ogg.header);
ogg.data = (u8_t*) &ogg.header;
ogg.match = 0;
} else {
LOG_INFO("OggS not at expected position");
return;
}
break;
}
case STREAM_OGG_HEADER:
if (!memcmp(stream.ogg.header.pattern, "OggS", 4)) {
stream.ogg.miss = stream.ogg.want = stream.ogg.header.count;
stream.ogg.data = stream.ogg.segments;
stream.ogg.state = STREAM_OGG_SEGMENTS;
case OGG_HEADER:
if (!memcmp(ogg.header.pattern, "OggS", 4)) {
ogg.miss = ogg.want = ogg.header.count;
ogg.data = ogg.segments;
ogg.state = OGG_SEGMENTS;
} else {
stream.ogg.state = STREAM_OGG_SYNC;
stream.ogg.data = NULL;
ogg.state = OGG_SYNC;
ogg.data = NULL;
}
break;
case STREAM_OGG_SEGMENTS:
case OGG_SEGMENTS:
// calculate size of page using lacing values
for (int i = 0; i < stream.ogg.want; i++) stream.ogg.miss += stream.ogg.data[i];
stream.ogg.want = stream.ogg.miss;
for (int i = 0; i < ogg.want; i++) ogg.miss += ogg.data[i];
ogg.want = ogg.miss;
if (stream.ogg.header.granule == 0) {
if (ogg.header.granule == 0) {
// granule 0 means a new stream, so let's look into it
stream.ogg.state = STREAM_OGG_PAGE;
stream.ogg.data = malloc(stream.ogg.want);
ogg.state = OGG_PAGE;
ogg.data = malloc(ogg.want);
} else {
// otherwise, jump over data
stream.ogg.state = STREAM_OGG_SYNC;
stream.ogg.data = NULL;
ogg.state = OGG_SYNC;
ogg.data = NULL;
}
break;
case STREAM_OGG_PAGE: {
case OGG_PAGE: {
u32_t offset = 0;
// try to find one of valid Ogg pattern (vorbis, opus)
for (char** tag = (char*[]) { "\x3vorbis", "OpusTags", NULL }; *tag; tag++, offset = 0) {
u32_t pos = memfind(stream.ogg.data, stream.ogg.want, *tag, strlen(*tag), &offset);
u32_t pos = memfind(ogg.data, ogg.want, *tag, strlen(*tag), &offset);
if (offset != strlen(*tag)) continue;
// u32:len,char[]:vendorId, u32:N, N x (u32:len,char[]:comment)
char* p = (char*) stream.ogg.data + pos;
char* p = (char*) ogg.data + pos;
p += *p + 4;
u32_t count = *p;
p += 4;
@@ -264,8 +279,8 @@ static void stream_ogg(size_t n) {
LOG_INFO("Ogg metadata length: %u", stream.header_len - 3);
break;
}
free(stream.ogg.data);
stream.ogg.state = STREAM_OGG_SYNC;
free(ogg.data);
ogg.state = OGG_SYNC;
break;
}
default:
@@ -703,8 +718,8 @@ void stream_sock(u32_t ip, u16_t port, char codec, const char *header, size_t he
stream.bytes = 0;
stream.threshold = threshold;
stream.ogg.miss = stream.ogg.match = 0;
stream.ogg.state = (codec == 'o' || codec == 'p') ? STREAM_OGG_SYNC : STREAM_OGG_OFF;
ogg.miss = ogg.match = 0;
ogg.state = (codec == 'o' || codec == 'p') ? OGG_SYNC : OGG_OFF;
UNLOCK;
}
@@ -725,8 +740,8 @@ bool stream_disconnect(void) {
disc = true;
}
stream.state = STOPPED;
if (stream.ogg.state == STREAM_OGG_PAGE && stream.ogg.data) free(stream.ogg.data);
stream.ogg.data = NULL;
if (ogg.state == OGG_PAGE && ogg.data) free(ogg.data);
ogg.data = NULL;
UNLOCK;
return disc;
}