Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "AMRWBDecoder.h" |
| 18 | |
| 19 | #include "pvamrwbdecoder.h" |
| 20 | |
| 21 | #include <media/stagefright/MediaBufferGroup.h> |
| 22 | #include <media/stagefright/MediaDebug.h> |
| 23 | #include <media/stagefright/MediaDefs.h> |
| 24 | #include <media/stagefright/MetaData.h> |
| 25 | |
| 26 | namespace android { |
| 27 | |
| 28 | static const int32_t kNumSamplesPerFrame = 320; |
| 29 | static const int32_t kSampleRate = 16000; |
| 30 | |
| 31 | AMRWBDecoder::AMRWBDecoder(const sp<MediaSource> &source) |
| 32 | : mSource(source), |
| 33 | mStarted(false), |
| 34 | mBufferGroup(NULL), |
| 35 | mState(NULL), |
| 36 | mDecoderBuf(NULL), |
| 37 | mDecoderCookie(NULL), |
| 38 | mAnchorTimeUs(0), |
| 39 | mNumSamplesOutput(0), |
| 40 | mInputBuffer(NULL) { |
| 41 | } |
| 42 | |
| 43 | AMRWBDecoder::~AMRWBDecoder() { |
| 44 | if (mStarted) { |
| 45 | stop(); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | status_t AMRWBDecoder::start(MetaData *params) { |
| 50 | CHECK(!mStarted); |
| 51 | |
| 52 | mBufferGroup = new MediaBufferGroup; |
| 53 | mBufferGroup->add_buffer( |
| 54 | new MediaBuffer(kNumSamplesPerFrame * sizeof(int16_t))); |
| 55 | |
| 56 | int32_t memReq = pvDecoder_AmrWbMemRequirements(); |
| 57 | mDecoderBuf = malloc(memReq); |
| 58 | |
| 59 | pvDecoder_AmrWb_Init(&mState, mDecoderBuf, &mDecoderCookie); |
| 60 | |
| 61 | mSource->start(); |
| 62 | |
| 63 | mAnchorTimeUs = 0; |
| 64 | mNumSamplesOutput = 0; |
| 65 | mStarted = true; |
| 66 | |
| 67 | return OK; |
| 68 | } |
| 69 | |
| 70 | status_t AMRWBDecoder::stop() { |
| 71 | CHECK(mStarted); |
| 72 | |
| 73 | if (mInputBuffer) { |
| 74 | mInputBuffer->release(); |
| 75 | mInputBuffer = NULL; |
| 76 | } |
| 77 | |
| 78 | delete mBufferGroup; |
| 79 | mBufferGroup = NULL; |
| 80 | |
| 81 | free(mDecoderBuf); |
| 82 | mDecoderBuf = NULL; |
| 83 | |
| 84 | mSource->stop(); |
| 85 | |
| 86 | mStarted = false; |
| 87 | |
| 88 | return OK; |
| 89 | } |
| 90 | |
| 91 | sp<MetaData> AMRWBDecoder::getFormat() { |
| 92 | sp<MetaData> srcFormat = mSource->getFormat(); |
| 93 | |
| 94 | int32_t numChannels; |
| 95 | int32_t sampleRate; |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 96 | |
| 97 | CHECK(srcFormat->findInt32(kKeyChannelCount, &numChannels)); |
| 98 | CHECK_EQ(numChannels, 1); |
| 99 | |
| 100 | CHECK(srcFormat->findInt32(kKeySampleRate, &sampleRate)); |
| 101 | CHECK_EQ(sampleRate, kSampleRate); |
| 102 | |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 103 | sp<MetaData> meta = new MetaData; |
| 104 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW); |
| 105 | meta->setInt32(kKeyChannelCount, numChannels); |
| 106 | meta->setInt32(kKeySampleRate, sampleRate); |
Andreas Huber | 85adf5e | 2009-12-11 11:27:02 -0800 | [diff] [blame] | 107 | |
| 108 | int64_t durationUs; |
| 109 | if (srcFormat->findInt64(kKeyDuration, &durationUs)) { |
| 110 | meta->setInt64(kKeyDuration, durationUs); |
| 111 | } |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 112 | |
Andreas Huber | 7167472 | 2010-03-30 13:50:38 -0700 | [diff] [blame] | 113 | meta->setCString(kKeyDecoderComponent, "AMRWBDecoder"); |
| 114 | |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 115 | return meta; |
| 116 | } |
| 117 | |
| 118 | static size_t getFrameSize(unsigned FT) { |
| 119 | static const size_t kFrameSizeWB[9] = { |
| 120 | 132, 177, 253, 285, 317, 365, 397, 461, 477 |
| 121 | }; |
| 122 | |
| 123 | size_t frameSize = kFrameSizeWB[FT]; |
| 124 | |
| 125 | // Round up bits to bytes and add 1 for the header byte. |
| 126 | frameSize = (frameSize + 7) / 8 + 1; |
| 127 | |
| 128 | return frameSize; |
| 129 | } |
| 130 | |
| 131 | status_t AMRWBDecoder::read( |
| 132 | MediaBuffer **out, const ReadOptions *options) { |
| 133 | status_t err; |
| 134 | |
| 135 | *out = NULL; |
| 136 | |
| 137 | int64_t seekTimeUs; |
Andreas Huber | 6624c9f | 2010-07-20 15:04:28 -0700 | [diff] [blame] | 138 | ReadOptions::SeekMode seekMode; |
| 139 | if (options && options->getSeekTo(&seekTimeUs, &seekMode)) { |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 140 | CHECK(seekTimeUs >= 0); |
| 141 | |
| 142 | mNumSamplesOutput = 0; |
| 143 | |
| 144 | if (mInputBuffer) { |
| 145 | mInputBuffer->release(); |
| 146 | mInputBuffer = NULL; |
| 147 | } |
| 148 | } else { |
| 149 | seekTimeUs = -1; |
| 150 | } |
| 151 | |
| 152 | if (mInputBuffer == NULL) { |
| 153 | err = mSource->read(&mInputBuffer, options); |
| 154 | |
| 155 | if (err != OK) { |
| 156 | return err; |
| 157 | } |
| 158 | |
| 159 | int64_t timeUs; |
| 160 | if (mInputBuffer->meta_data()->findInt64(kKeyTime, &timeUs)) { |
| 161 | mAnchorTimeUs = timeUs; |
| 162 | mNumSamplesOutput = 0; |
| 163 | } else { |
| 164 | // We must have a new timestamp after seeking. |
| 165 | CHECK(seekTimeUs < 0); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | MediaBuffer *buffer; |
| 170 | CHECK_EQ(mBufferGroup->acquire_buffer(&buffer), OK); |
| 171 | |
| 172 | const uint8_t *inputPtr = |
| 173 | (const uint8_t *)mInputBuffer->data() + mInputBuffer->range_offset(); |
| 174 | |
| 175 | int16 mode = ((inputPtr[0] >> 3) & 0x0f); |
| 176 | size_t frameSize = getFrameSize(mode); |
Andreas Huber | 85adf5e | 2009-12-11 11:27:02 -0800 | [diff] [blame] | 177 | CHECK(mInputBuffer->range_length() >= frameSize); |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 178 | |
| 179 | int16 frameType; |
Andreas Huber | 4b3913a | 2011-05-11 14:13:42 -0700 | [diff] [blame] | 180 | RX_State_wb rx_state; |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 181 | mime_unsorting( |
| 182 | const_cast<uint8_t *>(&inputPtr[1]), |
| 183 | mInputSampleBuffer, |
| 184 | &frameType, &mode, 1, &rx_state); |
| 185 | |
| 186 | int16_t *outPtr = (int16_t *)buffer->data(); |
| 187 | |
| 188 | int16_t numSamplesOutput; |
| 189 | pvDecoder_AmrWb( |
| 190 | mode, mInputSampleBuffer, |
| 191 | outPtr, |
| 192 | &numSamplesOutput, |
| 193 | mDecoderBuf, frameType, mDecoderCookie); |
| 194 | |
| 195 | CHECK_EQ(numSamplesOutput, kNumSamplesPerFrame); |
| 196 | |
| 197 | for (int i = 0; i < kNumSamplesPerFrame; ++i) { |
| 198 | /* Delete the 2 LSBs (14-bit output) */ |
| 199 | outPtr[i] &= 0xfffC; |
| 200 | } |
| 201 | |
| 202 | buffer->set_range(0, numSamplesOutput * sizeof(int16_t)); |
| 203 | |
Andreas Huber | 85adf5e | 2009-12-11 11:27:02 -0800 | [diff] [blame] | 204 | mInputBuffer->set_range( |
| 205 | mInputBuffer->range_offset() + frameSize, |
| 206 | mInputBuffer->range_length() - frameSize); |
| 207 | |
| 208 | if (mInputBuffer->range_length() == 0) { |
| 209 | mInputBuffer->release(); |
| 210 | mInputBuffer = NULL; |
| 211 | } |
Andreas Huber | a30d400 | 2009-12-08 15:40:06 -0800 | [diff] [blame] | 212 | |
| 213 | buffer->meta_data()->setInt64( |
| 214 | kKeyTime, |
| 215 | mAnchorTimeUs |
| 216 | + (mNumSamplesOutput * 1000000) / kSampleRate); |
| 217 | |
| 218 | mNumSamplesOutput += kNumSamplesPerFrame; |
| 219 | |
| 220 | *out = buffer; |
| 221 | |
| 222 | return OK; |
| 223 | } |
| 224 | |
| 225 | } // namespace android |