diff options
Diffstat (limited to 'media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp')
| -rw-r--r-- | media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp index cfbf282..5abfb71 100644 --- a/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp +++ b/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp @@ -22,6 +22,7 @@ #include "NuPlayerDecoder.h" #include <media/ICrypto.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> @@ -535,5 +536,272 @@ bool NuPlayer::Decoder::supportsSeamlessFormatChange(const sp<AMessage> &targetF return seamless; } +struct NuPlayer::CCDecoder::CCData { + CCData(uint8_t type, uint8_t data1, uint8_t data2) + : mType(type), mData1(data1), mData2(data2) { + } + + uint8_t mType; + uint8_t mData1; + uint8_t mData2; +}; + +NuPlayer::CCDecoder::CCDecoder(const sp<AMessage> ¬ify) + : mNotify(notify), + mTrackCount(0), + mSelectedTrack(-1) { +} + +size_t NuPlayer::CCDecoder::getTrackCount() const { + return mTrackCount; +} + +sp<AMessage> NuPlayer::CCDecoder::getTrackInfo(size_t index) const { + CHECK(index == 0); + + sp<AMessage> format = new AMessage(); + + format->setInt32("type", MEDIA_TRACK_TYPE_SUBTITLE); + format->setString("language", "und"); + format->setString("mime", MEDIA_MIMETYPE_TEXT_CEA_608); + format->setInt32("auto", 1); + format->setInt32("default", 1); + format->setInt32("forced", 0); + + return format; +} + +status_t NuPlayer::CCDecoder::selectTrack(size_t index, bool select) { + CHECK(index < mTrackCount); + + 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)mTrackCount; +} + +bool NuPlayer::CCDecoder::isNullPad(CCData *cc) const { + return cc->mData1 < 0x10 && cc->mData2 < 0x10; +} + +void NuPlayer::CCDecoder::dumpBytePair(const sp<ABuffer> &ccBuf) const { + 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()); +} + +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 hasCC = false; + + ABitReader br(sei->data() + 1, sei->size() - 1); + // sei_message() + while (br.numBitsLeft() >= 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) { + hasCC = true; + + // 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)) { + 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 hasCC; +} + +void NuPlayer::CCDecoder::decode(const sp<ABuffer> &accessUnit) { + if (extractFromSEI(accessUnit) && mTrackCount == 0) { + mTrackCount++; + + 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) { + ssize_t index = mCCMap.indexOfKey(timeUs); + if (index < 0) { + ALOGV("cc for timestamp %" PRId64 " not found", timeUs); + return; + } + + sp<ABuffer> &ccBuf = mCCMap.editValueAt(index); + + 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); +} + } // namespace android |