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author | Andreas Huber <andih@google.com> | 2010-06-07 14:35:29 -0700 |
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committer | Andreas Huber <andih@google.com> | 2010-06-07 14:35:29 -0700 |
commit | e71d10e7ad55ccbcb0756c007caef1c959090384 (patch) | |
tree | 42991995bb9ec7c3017f4ad59a3fe761d7aaf772 /media/libstagefright/httplive | |
parent | cda17c606b0fe3ccda4dc68a6d43882410ea2462 (diff) | |
download | frameworks_av-e71d10e7ad55ccbcb0756c007caef1c959090384.tar.gz frameworks_av-e71d10e7ad55ccbcb0756c007caef1c959090384.tar.bz2 frameworks_av-e71d10e7ad55ccbcb0756c007caef1c959090384.zip |
Initial checkin of preliminary support for "http live" streaming in stagefright.
Change-Id: I20399f63d63af86a3ba22641c0e43385a108fb3f
Diffstat (limited to 'media/libstagefright/httplive')
-rw-r--r-- | media/libstagefright/httplive/Android.mk | 20 | ||||
-rw-r--r-- | media/libstagefright/httplive/LiveSource.cpp | 191 | ||||
-rw-r--r-- | media/libstagefright/httplive/M3UParser.cpp | 231 |
3 files changed, 442 insertions, 0 deletions
diff --git a/media/libstagefright/httplive/Android.mk b/media/libstagefright/httplive/Android.mk new file mode 100644 index 0000000000..3de2c8036f --- /dev/null +++ b/media/libstagefright/httplive/Android.mk @@ -0,0 +1,20 @@ +LOCAL_PATH:= $(call my-dir) + +include $(CLEAR_VARS) + +LOCAL_SRC_FILES:= \ + LiveSource.cpp \ + M3UParser.cpp \ + +LOCAL_C_INCLUDES:= \ + $(JNI_H_INCLUDE) \ + $(TOP)/external/opencore/extern_libs_v2/khronos/openmax/include \ + $(TOP)/frameworks/base/media/libstagefright + +LOCAL_MODULE:= libstagefright_httplive + +ifeq ($(TARGET_ARCH),arm) + LOCAL_CFLAGS += -Wno-psabi +endif + +include $(BUILD_STATIC_LIBRARY) diff --git a/media/libstagefright/httplive/LiveSource.cpp b/media/libstagefright/httplive/LiveSource.cpp new file mode 100644 index 0000000000..9e3aa7b8cd --- /dev/null +++ b/media/libstagefright/httplive/LiveSource.cpp @@ -0,0 +1,191 @@ +/* + * 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. + */ + +#define LOG_TAG "LiveSource" +#include <utils/Log.h> + +#include "include/LiveSource.h" + +#include "include/HTTPStream.h" +#include "include/M3UParser.h" + +#include <media/stagefright/foundation/ABuffer.h> +#include <media/stagefright/HTTPDataSource.h> +#include <media/stagefright/MediaDebug.h> + +namespace android { + +LiveSource::LiveSource(const char *url) + : mURL(url), + mInitCheck(NO_INIT), + mPlaylistIndex(0), + mLastFetchTimeUs(-1), + mSourceSize(0), + mOffsetBias(0) { + if (switchToNext()) { + mInitCheck = OK; + } +} + +LiveSource::~LiveSource() { +} + +status_t LiveSource::initCheck() const { + return mInitCheck; +} + +bool LiveSource::loadPlaylist() { + mPlaylist.clear(); + mPlaylistIndex = 0; + + sp<ABuffer> buffer; + status_t err = fetchM3U(mURL.c_str(), &buffer); + + if (err != OK) { + return false; + } + + mPlaylist = new M3UParser(mURL.c_str(), buffer->data(), buffer->size()); + + if (mPlaylist->initCheck() != OK) { + return false; + } + + if (!mPlaylist->meta()->findInt32( + "media-sequence", &mFirstItemSequenceNumber)) { + mFirstItemSequenceNumber = 0; + } + + return true; +} + +static int64_t getNowUs() { + struct timeval tv; + gettimeofday(&tv, NULL); + + return (int64_t)tv.tv_usec + tv.tv_sec * 1000000ll; +} + +bool LiveSource::switchToNext() { + mOffsetBias += mSourceSize; + mSourceSize = 0; + + if (mLastFetchTimeUs < 0 || getNowUs() >= mLastFetchTimeUs + 15000000ll + || mPlaylistIndex == mPlaylist->size()) { + int32_t nextSequenceNumber = + mPlaylistIndex + mFirstItemSequenceNumber; + + if (!loadPlaylist()) { + LOGE("failed to reload playlist"); + return false; + } + + if (mLastFetchTimeUs < 0) { + mPlaylistIndex = mPlaylist->size() / 2; + } else { + if (nextSequenceNumber < mFirstItemSequenceNumber + || nextSequenceNumber + >= mFirstItemSequenceNumber + (int32_t)mPlaylist->size()) { + LOGE("Cannot find sequence number %d in new playlist", + nextSequenceNumber); + + return false; + } + + mPlaylistIndex = nextSequenceNumber - mFirstItemSequenceNumber; + } + + mLastFetchTimeUs = getNowUs(); + } + + AString uri; + CHECK(mPlaylist->itemAt(mPlaylistIndex, &uri)); + LOGI("switching to %s", uri.c_str()); + + mSource = new HTTPDataSource(uri.c_str()); + if (mSource->connect() != OK + || mSource->getSize(&mSourceSize) != OK) { + return false; + } + + mPlaylistIndex++; + return true; +} + +ssize_t LiveSource::readAt(off_t offset, void *data, size_t size) { + CHECK(offset >= mOffsetBias); + offset -= mOffsetBias; + + if (offset >= mSourceSize) { + CHECK_EQ(offset, mSourceSize); + + offset -= mSourceSize; + if (!switchToNext()) { + return ERROR_END_OF_STREAM; + } + } + + size_t numRead = 0; + while (numRead < size) { + ssize_t n = mSource->readAt( + offset + numRead, (uint8_t *)data + numRead, size - numRead); + + if (n <= 0) { + break; + } + + numRead += n; + } + + return numRead; +} + +status_t LiveSource::fetchM3U(const char *url, sp<ABuffer> *out) { + *out = NULL; + + mSource = new HTTPDataSource(url); + status_t err = mSource->connect(); + + if (err != OK) { + return err; + } + + off_t size; + err = mSource->getSize(&size); + + if (err != OK) { + return err; + } + + sp<ABuffer> buffer = new ABuffer(size); + size_t offset = 0; + while (offset < (size_t)size) { + ssize_t n = mSource->readAt( + offset, buffer->data() + offset, size - offset); + + if (n <= 0) { + return ERROR_IO; + } + + offset += n; + } + + *out = buffer; + + return OK; +} + +} // namespace android diff --git a/media/libstagefright/httplive/M3UParser.cpp b/media/libstagefright/httplive/M3UParser.cpp new file mode 100644 index 0000000000..edd8648e07 --- /dev/null +++ b/media/libstagefright/httplive/M3UParser.cpp @@ -0,0 +1,231 @@ +/* + * 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 { + 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 |