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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "include/M3UParser.h"
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/MediaDebug.h>
#include <media/stagefright/MediaErrors.h>
namespace android {
M3UParser::M3UParser(
const char *baseURI, const void *data, size_t size)
: mInitCheck(NO_INIT),
mBaseURI(baseURI),
mIsExtM3U(false),
mIsVariantPlaylist(false) {
mInitCheck = parse(data, size);
}
M3UParser::~M3UParser() {
}
status_t M3UParser::initCheck() const {
return mInitCheck;
}
bool M3UParser::isExtM3U() const {
return mIsExtM3U;
}
bool M3UParser::isVariantPlaylist() const {
return mIsVariantPlaylist;
}
sp<AMessage> M3UParser::meta() {
return mMeta;
}
size_t M3UParser::size() {
return mItems.size();
}
bool M3UParser::itemAt(size_t index, AString *uri, sp<AMessage> *meta) {
uri->clear();
if (meta) { *meta = NULL; }
if (index >= mItems.size()) {
return false;
}
*uri = mItems.itemAt(index).mURI;
if (meta) {
*meta = mItems.itemAt(index).mMeta;
}
return true;
}
static bool MakeURL(const char *baseURL, const char *url, AString *out) {
out->clear();
if (strncasecmp("http://", baseURL, 7)) {
// Base URL must be absolute
return false;
}
if (!strncasecmp("http://", url, 7)) {
// "url" is already an absolute URL, ignore base URL.
out->setTo(url);
return true;
}
size_t n = strlen(baseURL);
if (baseURL[n - 1] == '/') {
out->setTo(baseURL);
out->append(url);
} else {
const char *slashPos = strrchr(baseURL, '/');
if (slashPos > &baseURL[6]) {
out->setTo(baseURL, slashPos - baseURL);
} else {
out->setTo(baseURL);
}
out->append("/");
out->append(url);
}
return true;
}
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 (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("#EXTINF")) {
if (mIsVariantPlaylist) {
return ERROR_MALFORMED;
}
err = parseMetaData(line, &itemMeta, "duration");
} else if (line.startsWith("#EXT-X-STREAM-INF")) {
if (mMeta != NULL) {
return ERROR_MALFORMED;
}
mIsVariantPlaylist = true;
}
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;
}
// static
status_t M3UParser::parseMetaData(
const AString &line, sp<AMessage> *meta, const char *key) {
ssize_t colonPos = line.find(":");
if (colonPos < 0) {
return ERROR_MALFORMED;
}
int32_t x;
status_t err = ParseInt32(line.c_str() + colonPos + 1, &x);
if (err != OK) {
return err;
}
if (meta->get() == NULL) {
*meta = new AMessage;
}
(*meta)->setInt32(key, x);
return OK;
}
// static
status_t M3UParser::ParseInt32(const char *s, int32_t *x) {
char *end;
long lval = strtol(s, &end, 10);
if (end == s || (*end != '\0' && *end != ',')) {
return ERROR_MALFORMED;
}
*x = (int32_t)lval;
return OK;
}
} // namespace android
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