tunnel NuPlayer source and decoder input
Bug: 18342383
Change-Id: Ieff1cd3bad2b39d46f127ddd5d5139b919992461
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerCCDecoder.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerCCDecoder.cpp
new file mode 100644
index 0000000..9229704
--- /dev/null
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerCCDecoder.cpp
@@ -0,0 +1,361 @@
+/*
+ * Copyright 2014 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_NDEBUG 0
+#define LOG_TAG "NuPlayerCCDecoder"
+#include <utils/Log.h>
+#include <inttypes.h>
+
+#include "NuPlayerCCDecoder.h"
+
+#include <media/stagefright/foundation/ABitReader.h>
+#include <media/stagefright/foundation/ABuffer.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/foundation/AMessage.h>
+#include <media/stagefright/MediaDefs.h>
+
+namespace android {
+
+struct CCData {
+ CCData(uint8_t type, uint8_t data1, uint8_t data2)
+ : mType(type), mData1(data1), mData2(data2) {
+ }
+ bool getChannel(size_t *channel) const {
+ if (mData1 >= 0x10 && mData1 <= 0x1f) {
+ *channel = (mData1 >= 0x18 ? 1 : 0) + (mType ? 2 : 0);
+ return true;
+ }
+ return false;
+ }
+
+ uint8_t mType;
+ uint8_t mData1;
+ uint8_t mData2;
+};
+
+static bool isNullPad(CCData *cc) {
+ return cc->mData1 < 0x10 && cc->mData2 < 0x10;
+}
+
+static void dumpBytePair(const sp<ABuffer> &ccBuf) {
+ size_t offset = 0;
+ AString out;
+
+ while (offset < ccBuf->size()) {
+ char tmp[128];
+
+ CCData *cc = (CCData *) (ccBuf->data() + offset);
+
+ if (isNullPad(cc)) {
+ // 1 null pad or XDS metadata, ignore
+ offset += sizeof(CCData);
+ continue;
+ }
+
+ if (cc->mData1 >= 0x20 && cc->mData1 <= 0x7f) {
+ // 2 basic chars
+ sprintf(tmp, "[%d]Basic: %c %c", cc->mType, cc->mData1, cc->mData2);
+ } else if ((cc->mData1 == 0x11 || cc->mData1 == 0x19)
+ && cc->mData2 >= 0x30 && cc->mData2 <= 0x3f) {
+ // 1 special char
+ sprintf(tmp, "[%d]Special: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ } else if ((cc->mData1 == 0x12 || cc->mData1 == 0x1A)
+ && cc->mData2 >= 0x20 && cc->mData2 <= 0x3f){
+ // 1 Spanish/French char
+ sprintf(tmp, "[%d]Spanish: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ } else if ((cc->mData1 == 0x13 || cc->mData1 == 0x1B)
+ && cc->mData2 >= 0x20 && cc->mData2 <= 0x3f){
+ // 1 Portuguese/German/Danish char
+ sprintf(tmp, "[%d]German: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ } else if ((cc->mData1 == 0x11 || cc->mData1 == 0x19)
+ && cc->mData2 >= 0x20 && cc->mData2 <= 0x2f){
+ // Mid-Row Codes (Table 69)
+ sprintf(tmp, "[%d]Mid-row: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ } else if (((cc->mData1 == 0x14 || cc->mData1 == 0x1c)
+ && cc->mData2 >= 0x20 && cc->mData2 <= 0x2f)
+ ||
+ ((cc->mData1 == 0x17 || cc->mData1 == 0x1f)
+ && cc->mData2 >= 0x21 && cc->mData2 <= 0x23)){
+ // Misc Control Codes (Table 70)
+ sprintf(tmp, "[%d]Ctrl: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ } else if ((cc->mData1 & 0x70) == 0x10
+ && (cc->mData2 & 0x40) == 0x40
+ && ((cc->mData1 & 0x07) || !(cc->mData2 & 0x20)) ) {
+ // Preamble Address Codes (Table 71)
+ sprintf(tmp, "[%d]PAC: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ } else {
+ sprintf(tmp, "[%d]Invalid: %02x %02x", cc->mType, cc->mData1, cc->mData2);
+ }
+
+ if (out.size() > 0) {
+ out.append(", ");
+ }
+
+ out.append(tmp);
+
+ offset += sizeof(CCData);
+ }
+
+ ALOGI("%s", out.c_str());
+}
+
+NuPlayer::CCDecoder::CCDecoder(const sp<AMessage> ¬ify)
+ : mNotify(notify),
+ mCurrentChannel(0),
+ mSelectedTrack(-1) {
+ for (size_t i = 0; i < sizeof(mTrackIndices)/sizeof(mTrackIndices[0]); ++i) {
+ mTrackIndices[i] = -1;
+ }
+}
+
+size_t NuPlayer::CCDecoder::getTrackCount() const {
+ return mFoundChannels.size();
+}
+
+sp<AMessage> NuPlayer::CCDecoder::getTrackInfo(size_t index) const {
+ if (!isTrackValid(index)) {
+ return NULL;
+ }
+
+ sp<AMessage> format = new AMessage();
+
+ format->setInt32("type", MEDIA_TRACK_TYPE_SUBTITLE);
+ format->setString("language", "und");
+ format->setString("mime", MEDIA_MIMETYPE_TEXT_CEA_608);
+ //CC1, field 0 channel 0
+ bool isDefaultAuto = (mFoundChannels[index] == 0);
+ format->setInt32("auto", isDefaultAuto);
+ format->setInt32("default", isDefaultAuto);
+ format->setInt32("forced", 0);
+
+ return format;
+}
+
+status_t NuPlayer::CCDecoder::selectTrack(size_t index, bool select) {
+ if (!isTrackValid(index)) {
+ return BAD_VALUE;
+ }
+
+ if (select) {
+ if (mSelectedTrack == (ssize_t)index) {
+ ALOGE("track %zu already selected", index);
+ return BAD_VALUE;
+ }
+ ALOGV("selected track %zu", index);
+ mSelectedTrack = index;
+ } else {
+ if (mSelectedTrack != (ssize_t)index) {
+ ALOGE("track %zu is not selected", index);
+ return BAD_VALUE;
+ }
+ ALOGV("unselected track %zu", index);
+ mSelectedTrack = -1;
+ }
+
+ return OK;
+}
+
+bool NuPlayer::CCDecoder::isSelected() const {
+ return mSelectedTrack >= 0 && mSelectedTrack < (int32_t) getTrackCount();
+}
+
+bool NuPlayer::CCDecoder::isTrackValid(size_t index) const {
+ return index < getTrackCount();
+}
+
+int32_t NuPlayer::CCDecoder::getTrackIndex(size_t channel) const {
+ if (channel < sizeof(mTrackIndices)/sizeof(mTrackIndices[0])) {
+ return mTrackIndices[channel];
+ }
+ return -1;
+}
+
+// returns true if a new CC track is found
+bool NuPlayer::CCDecoder::extractFromSEI(const sp<ABuffer> &accessUnit) {
+ int64_t timeUs;
+ CHECK(accessUnit->meta()->findInt64("timeUs", &timeUs));
+
+ sp<ABuffer> sei;
+ if (!accessUnit->meta()->findBuffer("sei", &sei) || sei == NULL) {
+ return false;
+ }
+
+ bool trackAdded = false;
+
+ NALBitReader br(sei->data() + 1, sei->size() - 1);
+ // sei_message()
+ while (br.atLeastNumBitsLeft(16)) { // at least 16-bit for sei_message()
+ uint32_t payload_type = 0;
+ size_t payload_size = 0;
+ uint8_t last_byte;
+
+ do {
+ last_byte = br.getBits(8);
+ payload_type += last_byte;
+ } while (last_byte == 0xFF);
+
+ do {
+ last_byte = br.getBits(8);
+ payload_size += last_byte;
+ } while (last_byte == 0xFF);
+
+ // sei_payload()
+ if (payload_type == 4) {
+ // user_data_registered_itu_t_t35()
+
+ // ATSC A/72: 6.4.2
+ uint8_t itu_t_t35_country_code = br.getBits(8);
+ uint16_t itu_t_t35_provider_code = br.getBits(16);
+ uint32_t user_identifier = br.getBits(32);
+ uint8_t user_data_type_code = br.getBits(8);
+
+ payload_size -= 1 + 2 + 4 + 1;
+
+ if (itu_t_t35_country_code == 0xB5
+ && itu_t_t35_provider_code == 0x0031
+ && user_identifier == 'GA94'
+ && user_data_type_code == 0x3) {
+ // MPEG_cc_data()
+ // ATSC A/53 Part 4: 6.2.3.1
+ br.skipBits(1); //process_em_data_flag
+ bool process_cc_data_flag = br.getBits(1);
+ br.skipBits(1); //additional_data_flag
+ size_t cc_count = br.getBits(5);
+ br.skipBits(8); // em_data;
+ payload_size -= 2;
+
+ if (process_cc_data_flag) {
+ AString out;
+
+ sp<ABuffer> ccBuf = new ABuffer(cc_count * sizeof(CCData));
+ ccBuf->setRange(0, 0);
+
+ for (size_t i = 0; i < cc_count; i++) {
+ uint8_t marker = br.getBits(5);
+ CHECK_EQ(marker, 0x1f);
+
+ bool cc_valid = br.getBits(1);
+ uint8_t cc_type = br.getBits(2);
+ // remove odd parity bit
+ uint8_t cc_data_1 = br.getBits(8) & 0x7f;
+ uint8_t cc_data_2 = br.getBits(8) & 0x7f;
+
+ if (cc_valid
+ && (cc_type == 0 || cc_type == 1)) {
+ CCData cc(cc_type, cc_data_1, cc_data_2);
+ if (!isNullPad(&cc)) {
+ size_t channel;
+ if (cc.getChannel(&channel) && getTrackIndex(channel) < 0) {
+ mTrackIndices[channel] = mFoundChannels.size();
+ mFoundChannels.push_back(channel);
+ trackAdded = true;
+ }
+ memcpy(ccBuf->data() + ccBuf->size(),
+ (void *)&cc, sizeof(cc));
+ ccBuf->setRange(0, ccBuf->size() + sizeof(CCData));
+ }
+ }
+ }
+ payload_size -= cc_count * 3;
+
+ mCCMap.add(timeUs, ccBuf);
+ break;
+ }
+ } else {
+ ALOGV("Malformed SEI payload type 4");
+ }
+ } else {
+ ALOGV("Unsupported SEI payload type %d", payload_type);
+ }
+
+ // skipping remaining bits of this payload
+ br.skipBits(payload_size * 8);
+ }
+
+ return trackAdded;
+}
+
+sp<ABuffer> NuPlayer::CCDecoder::filterCCBuf(
+ const sp<ABuffer> &ccBuf, size_t index) {
+ sp<ABuffer> filteredCCBuf = new ABuffer(ccBuf->size());
+ filteredCCBuf->setRange(0, 0);
+
+ size_t cc_count = ccBuf->size() / sizeof(CCData);
+ const CCData* cc_data = (const CCData*)ccBuf->data();
+ for (size_t i = 0; i < cc_count; ++i) {
+ size_t channel;
+ if (cc_data[i].getChannel(&channel)) {
+ mCurrentChannel = channel;
+ }
+ if (mCurrentChannel == mFoundChannels[index]) {
+ memcpy(filteredCCBuf->data() + filteredCCBuf->size(),
+ (void *)&cc_data[i], sizeof(CCData));
+ filteredCCBuf->setRange(0, filteredCCBuf->size() + sizeof(CCData));
+ }
+ }
+
+ return filteredCCBuf;
+}
+
+void NuPlayer::CCDecoder::decode(const sp<ABuffer> &accessUnit) {
+ if (extractFromSEI(accessUnit)) {
+ ALOGI("Found CEA-608 track");
+ sp<AMessage> msg = mNotify->dup();
+ msg->setInt32("what", kWhatTrackAdded);
+ msg->post();
+ }
+ // TODO: extract CC from other sources
+}
+
+void NuPlayer::CCDecoder::display(int64_t timeUs) {
+ if (!isTrackValid(mSelectedTrack)) {
+ ALOGE("Could not find current track(index=%d)", mSelectedTrack);
+ return;
+ }
+
+ ssize_t index = mCCMap.indexOfKey(timeUs);
+ if (index < 0) {
+ ALOGV("cc for timestamp %" PRId64 " not found", timeUs);
+ return;
+ }
+
+ sp<ABuffer> ccBuf = filterCCBuf(mCCMap.valueAt(index), mSelectedTrack);
+
+ if (ccBuf->size() > 0) {
+#if 0
+ dumpBytePair(ccBuf);
+#endif
+
+ ccBuf->meta()->setInt32("trackIndex", mSelectedTrack);
+ ccBuf->meta()->setInt64("timeUs", timeUs);
+ ccBuf->meta()->setInt64("durationUs", 0ll);
+
+ sp<AMessage> msg = mNotify->dup();
+ msg->setInt32("what", kWhatClosedCaptionData);
+ msg->setBuffer("buffer", ccBuf);
+ msg->post();
+ }
+
+ // remove all entries before timeUs
+ mCCMap.removeItemsAt(0, index + 1);
+}
+
+void NuPlayer::CCDecoder::flush() {
+ mCCMap.clear();
+}
+
+} // namespace android
+