status_t M3UParser::parse(const void *_data, size_t size) {
int32_t lineNo = 0;
sp<AMessage> itemMeta;
const char *data = (const char *)_data;
size_t offset = 0;
while (offset < size) {
size_t offsetLF = offset;
while (offsetLF < size && data[offsetLF] != '\n') {
++offsetLF;
}
if (offsetLF >= size) {
break;
}
AString line;
if (offsetLF > offset && data[offsetLF - 1] == '\r') {
line.setTo(&data[offset], offsetLF - offset - 1);
} else {
line.setTo(&data[offset], offsetLF - offset);
}
// LOGI("#%s#", line.c_str());
if (line.empty()) {
offset = offsetLF + 1;
continue;
}
if (lineNo == 0 && line == "#EXTM3U") {
mIsExtM3U = true;
}
if (mIsExtM3U) {
status_t err = OK;
if (line.startsWith("#EXT-X-TARGETDURATION")) {
if (mIsVariantPlaylist) {
return ERROR_MALFORMED;
}
err = parseMetaData(line, &mMeta, "target-duration");
} else if (line.startsWith("#EXT-X-MEDIA-SEQUENCE")) {
if (mIsVariantPlaylist) {
return ERROR_MALFORMED;
}
err = parseMetaData(line, &mMeta, "media-sequence");
} else if (line.startsWith("#EXT-X-ENDLIST")) {
mIsComplete = true;
} else if (line.startsWith("#EXTINF")) {
if (mIsVariantPlaylist) {
return ERROR_MALFORMED;
}
err = parseMetaData(line, &itemMeta, "duration");
} else if (line.startsWith("#EXT-X-DISCONTINUITY")) {
if (mIsVariantPlaylist) {
return ERROR_MALFORMED;
}
if (itemMeta == NULL) {
itemMeta = new AMessage;
}
itemMeta->setInt32("discontinuity", true);
} else if (line.startsWith("#EXT-X-STREAM-INF")) {
if (mMeta != NULL) {
return ERROR_MALFORMED;
}
mIsVariantPlaylist = true;
err = parseStreamInf(line, &itemMeta);
}
if (err != OK) {
return err;
}
}
if (!line.startsWith("#")) {
if (!mIsVariantPlaylist) {
int32_t durationSecs;
if (itemMeta == NULL
|| !itemMeta->findInt32("duration", &durationSecs)) {
return ERROR_MALFORMED;
}
}
mItems.push();
Item *item = &mItems.editItemAt(mItems.size() - 1);
CHECK(MakeURL(mBaseURI.c_str(), line.c_str(), &item->mURI));
item->mMeta = itemMeta;
itemMeta.clear();
}
offset = offsetLF + 1;
++lineNo;
}
return OK;
}
bool ASessionDescription::parse(const void *data, size_t size) {
mTracks.clear();
mFormats.clear();
mTracks.push(Attribs());
mFormats.push(AString("[root]"));
AString desc((const char *)data, size);
size_t i = 0;
for (;;) {
ssize_t eolPos = desc.find("\n", i);
if (eolPos < 0) {
break;
}
AString line;
if ((size_t)eolPos > i && desc.c_str()[eolPos - 1] == '\r') {
// We accept both '\n' and '\r\n' line endings, if it's
// the latter, strip the '\r' as well.
line.setTo(desc, i, eolPos - i - 1);
} else {
line.setTo(desc, i, eolPos - i);
}
if (line.empty()) {
i = eolPos + 1;
continue;
}
if (line.size() < 2 || line.c_str()[1] != '=') {
return false;
}
ALOGI("%s", line.c_str());
switch (line.c_str()[0]) {
case 'v':
{
if (strcmp(line.c_str(), "v=0")) {
return false;
}
break;
}
case 'a':
case 'b':
{
AString key, value;
ssize_t colonPos = line.find(":", 2);
if (colonPos < 0) {
key = line;
} else {
key.setTo(line, 0, colonPos);
if (key == "a=fmtp" || key == "a=rtpmap"
|| key == "a=framesize") {
ssize_t spacePos = line.find(" ", colonPos + 1);
if (spacePos < 0) {
return false;
}
key.setTo(line, 0, spacePos);
colonPos = spacePos;
}
value.setTo(line, colonPos + 1, line.size() - colonPos - 1);
}
key.trim();
value.trim();
ALOGV("adding '%s' => '%s'", key.c_str(), value.c_str());
mTracks.editItemAt(mTracks.size() - 1).add(key, value);
break;
}
case 'm':
{
ALOGV("new section '%s'",
AString(line, 2, line.size() - 2).c_str());
mTracks.push(Attribs());
mFormats.push(AString(line, 2, line.size() - 2));
break;
}
default:
{
AString key, value;
ssize_t equalPos = line.find("=");
key = AString(line, 0, equalPos + 1);
value = AString(line, equalPos + 1, line.size() - equalPos - 1);
key.trim();
value.trim();
ALOGV("adding '%s' => '%s'", key.c_str(), value.c_str());
mTracks.editItemAt(mTracks.size() - 1).add(key, value);
break;
}
}
i = eolPos + 1;
}
return true;
}
int main(int argc, char **argv) {
using namespace android;
//负责打开Binder驱动，建立线程池，让其进程里面的所有线程都能通过Binder通信 http://blog.csdn.net/pi9nc/article/details/9749325
//每个线程都有一个IPCThreadState实例登记在Linux线程的上下文附属数据中，主要负责Binder的读取，写入和请求处理框架
ProcessState::self()->startThreadPool();
//基类DataSource提供了一些分离器
DataSource::RegisterDefaultSniffers();
AString connectToHost;
int32_t connectToPort = -1;
AString uri;
AString listenOnAddr;
int32_t listenOnPort = -1;
int res;
//解析参数
while ((res = getopt(argc, argv, "hc:l:u:")) >= 0) {
switch (res) {
//建立连接，设置默认端口
case 'c':
{
const char *colonPos = strrchr(optarg, ':');
if (colonPos == NULL) {
connectToHost = optarg;
connectToPort = WifiDisplaySource::kWifiDisplayDefaultPort; //kWifiDisplayDefaultPort = 7236;
} else {
connectToHost.setTo(optarg, colonPos - optarg);
char *end;
connectToPort = strtol(colonPos + 1, &end, 10);
if (*end != '\0' || end == colonPos + 1
|| connectToPort < 1 || connectToPort > 65535) {
fprintf(stderr, "Illegal port specified.\n");
exit(1);
}
}
break;
}
case 'u':
{
uri = optarg;
break;
}
case 'l':
{
const char *colonPos = strrchr(optarg, ':');
if (colonPos == NULL) {
listenOnAddr = optarg;
listenOnPort = WifiDisplaySource::kWifiDisplayDefaultPort; //kWifiDisplayDefaultPort = 7236;
} else {
listenOnAddr.setTo(optarg, colonPos - optarg);
char *end;
listenOnPort = strtol(colonPos + 1, &end, 10);
if (*end != '\0' || end == colonPos + 1
|| listenOnPort < 1 || listenOnPort > 65535) {
fprintf(stderr, "Illegal port specified.\n");
exit(1);
}
}
break;
}
case '?':
case 'h':
default:
usage(argv[0]);
exit(1);
}
}
if (connectToPort >= 0 && listenOnPort >= 0) {
fprintf(stderr,
"You can connect to a source or create one, "
"but not both at the same time.\n");
exit(1);
}
if (listenOnPort >= 0) {
createSource(listenOnAddr, listenOnPort);
exit(0);
}
if (connectToPort < 0 && uri.empty()) {
fprintf(stderr,
"You need to select either source host or uri.\n");
exit(1);
}
if (connectToPort >= 0 && !uri.empty()) {
fprintf(stderr,
"You need to either connect to a wfd host or an rtsp url, "
"not both.\n");
exit(1);
}
sp<ANetworkSession> session = new ANetworkSession;
session->start();
//strong pointer，而wp则是weak pointer的意思
sp<ALooper> looper = new ALooper;
sp<WifiDisplaySink> sink = new WifiDisplaySink(session);
looper->registerHandler(sink);
if (connectToPort >= 0) {
sink->start(connectToHost.c_str(), connectToPort);
} else {
sink->start(uri.c_str());
}
looper->start(true /* runOnCallingThread */);
return 0;
}
bool ASessionDescription::parse(const void *data, size_t size) {
mTracks.clear();
mFormats.clear();
mTracks.push(Attribs());
mFormats.push(AString("[root]"));
AString desc((const char *)data, size);
#ifndef ANDROID_DEFAULT_CODE
int rtpmapNum = 0;
bool unsupported = false;
#endif // #ifndef ANDROID_DEFAULT_CODE
size_t i = 0;
for (;;) {
#ifndef ANDROID_DEFAULT_CODE
if (i >= desc.size()) {
break;
}
#endif // #ifndef ANDROID_DEFAULT_CODE
ssize_t eolPos = desc.find("\n", i);
if (eolPos < 0) {
#ifndef ANDROID_DEFAULT_CODE
eolPos = desc.size();
#else
break;
#endif // #ifndef ANDROID_DEFAULT_CODE
}
AString line;
if ((size_t)eolPos > i && desc.c_str()[eolPos - 1] == '\r') {
// We accept both '\n' and '\r\n' line endings, if it's
// the latter, strip the '\r' as well.
line.setTo(desc, i, eolPos - i - 1);
} else {
line.setTo(desc, i, eolPos - i);
}
if (line.empty()) {
i = eolPos + 1;
continue;
}
if (line.size() < 2 || line.c_str()[1] != '=') {
return false;
}
#ifndef ANDROID_DEFAULT_CODE
if (unsupported && line.c_str()[0] != 'm') {
LOGI("skip %s in unsupported media description", line.c_str());
i = eolPos + 1;
continue;
} else
#endif // #ifndef ANDROID_DEFAULT_CODE
LOGI("%s", line.c_str());
switch (line.c_str()[0]) {
case 'v':
{
if (strcmp(line.c_str(), "v=0")) {
return false;
}
break;
}
case 'a':
case 'b':
{
AString key, value;
ssize_t colonPos = line.find(":", 2);
if (colonPos < 0) {
key = line;
} else {
key.setTo(line, 0, colonPos);
if (key == "a=fmtp" || key == "a=rtpmap"
|| key == "a=framesize") {
ssize_t spacePos = line.find(" ", colonPos + 1);
if (spacePos < 0) {
return false;
}
#ifndef ANDROID_DEFAULT_CODE
if (key == "a=rtpmap") {
if (rtpmapNum > 0) {
mTracks.pop();
mFormats.pop();
unsupported = true;
LOGW("ASessionDescription: multiple rtpmap"
" for one media is not supported yet");
break;
} else {
rtpmapNum++;
}
}
#endif // #ifndef ANDROID_DEFAULT_CODE
key.setTo(line, 0, spacePos);
colonPos = spacePos;
}
value.setTo(line, colonPos + 1, line.size() - colonPos - 1);
}
key.trim();
value.trim();
LOGV("adding '%s' => '%s'", key.c_str(), value.c_str());
mTracks.editItemAt(mTracks.size() - 1).add(key, value);
break;
}
case 'm':
{
LOGV("new section '%s'",
AString(line, 2, line.size() - 2).c_str());
#ifndef ANDROID_DEFAULT_CODE
rtpmapNum = 0;
unsupported = false;
#endif // #ifndef ANDROID_DEFAULT_CODE
mTracks.push(Attribs());
mFormats.push(AString(line, 2, line.size() - 2));
break;
}
default:
{
AString key, value;
ssize_t equalPos = line.find("=");
key = AString(line, 0, equalPos + 1);
value = AString(line, equalPos + 1, line.size() - equalPos - 1);
key.trim();
value.trim();
LOGV("adding '%s' => '%s'", key.c_str(), value.c_str());
mTracks.editItemAt(mTracks.size() - 1).add(key, value);
break;
}
}
i = eolPos + 1;
}
return true;
}
int main(int argc, char **argv) {
using namespace android;
ProcessState::self()->startThreadPool();
DataSource::RegisterDefaultSniffers();
AString connectToHost;
int32_t connectToPort = -1;
AString uri;
AString listenOnAddr;
int32_t listenOnPort = -1;
AString path;
///M: @{
int isFastSetup = 0;
///@}
int res;
while ((res = getopt(argc, argv, "hpic:b:l:t:f:r:u:e:s:d")) >= 0) {
switch (res) {
case 'b':
{
const char *colonPos = strrchr(optarg, ':');
if (colonPos == NULL) {
connectToHost = optarg;
connectToPort = WFD_UIBC_SERVER_PORT;
} else {
connectToHost.setTo(optarg, colonPos - optarg);
char *end;
connectToPort = strtol(colonPos + 1, &end, 10);
if (*end != '\0' || end == colonPos + 1
|| connectToPort < 1 || connectToPort > 65535) {
fprintf(stderr, "Illegal port specified.\n");
exit(1);
}
}
connectUibc(connectToHost.c_str(), connectToPort);
exit(1);
break;
}
case 't':
{
isFastSetup = 1;
}
case 'f':
{
path = optarg;
break;
}
case 'u':
{
uri = optarg;
break;
}
case 'l':
{
const char *colonPos = strrchr(optarg, ':');
if (colonPos == NULL) {
listenOnAddr = optarg;
listenOnPort = WifiDisplaySource::kWifiDisplayDefaultPort;
} else {
listenOnAddr.setTo(optarg, colonPos - optarg);
char *end;
listenOnPort = strtol(colonPos + 1, &end, 10);
if (*end != '\0' || end == colonPos + 1
|| listenOnPort < 1 || listenOnPort > 65535) {
fprintf(stderr, "Illegal port specified.\n");
exit(1);
}
}
break;
}
case 'r':
{
enableFastRtpRemoteDisplay(optarg);
exit(0);
break;
}
case 'e':
{
enableDisableRemoteDisplay(optarg);
exit(0);
break;
}
case 'd':
{
enableDisableRemoteDisplay(NULL);
exit(0);
break;
}
case 's':
{
setStreamMode(optarg);
exit(0);
break;
}
case '?':
case 'h':
default:
testUibcCmd(argv[1]);
usage(argv[0]);
exit(1);
}
}
if (listenOnPort >= 0) {
if (path.empty()) {
createSource(listenOnAddr, listenOnPort);
} else {
createFileSource(listenOnAddr, listenOnPort, path.c_str());
}
exit(0);
}
usage(argv[0]);
return 0;
}