Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [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 | //#define LOG_NDEBUG 0 |
| 18 | #define LOG_TAG "MP3Extractor" |
| 19 | #include <utils/Log.h> |
| 20 | |
Andreas Huber | 66326a5 | 2009-10-23 09:55:10 -0700 | [diff] [blame] | 21 | #include "include/MP3Extractor.h" |
| 22 | |
Andreas Huber | 386d609 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 23 | #include "include/avc_utils.h" |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 24 | #include "include/ID3.h" |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 25 | #include "include/VBRISeeker.h" |
| 26 | #include "include/XINGSeeker.h" |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 27 | |
Andreas Huber | 2944eca | 2011-09-08 14:12:44 -0700 | [diff] [blame] | 28 | #include <media/stagefright/foundation/ADebug.h> |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 29 | #include <media/stagefright/foundation/AMessage.h> |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 30 | #include <media/stagefright/DataSource.h> |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 31 | #include <media/stagefright/MediaBuffer.h> |
| 32 | #include <media/stagefright/MediaBufferGroup.h> |
Andreas Huber | 18291bc | 2009-09-10 14:13:30 -0700 | [diff] [blame] | 33 | #include <media/stagefright/MediaDefs.h> |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 34 | #include <media/stagefright/MediaErrors.h> |
| 35 | #include <media/stagefright/MediaSource.h> |
| 36 | #include <media/stagefright/MetaData.h> |
| 37 | #include <media/stagefright/Utils.h> |
| 38 | #include <utils/String8.h> |
| 39 | |
| 40 | namespace android { |
| 41 | |
Andreas Huber | 5419629 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 42 | // Everything must match except for |
James Dong | 2eb6a47 | 2011-03-04 11:25:17 -0800 | [diff] [blame] | 43 | // protection, bitrate, padding, private bits, mode, mode extension, |
Andreas Huber | ba1f481 | 2010-03-04 16:49:03 -0800 | [diff] [blame] | 44 | // copyright bit, original bit and emphasis. |
| 45 | // Yes ... there are things that must indeed match... |
James Dong | 2eb6a47 | 2011-03-04 11:25:17 -0800 | [diff] [blame] | 46 | static const uint32_t kMask = 0xfffe0c00; |
Andreas Huber | 5419629 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 47 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 48 | static bool Resync( |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 49 | const sp<DataSource> &source, uint32_t match_header, |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 50 | off64_t *inout_pos, off64_t *post_id3_pos, uint32_t *out_header) { |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 51 | if (post_id3_pos != NULL) { |
| 52 | *post_id3_pos = 0; |
| 53 | } |
| 54 | |
Andreas Huber | 0bf3921 | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 55 | if (*inout_pos == 0) { |
| 56 | // Skip an optional ID3 header if syncing at the very beginning |
| 57 | // of the datasource. |
| 58 | |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 59 | for (;;) { |
| 60 | uint8_t id3header[10]; |
| 61 | if (source->readAt(*inout_pos, id3header, sizeof(id3header)) |
| 62 | < (ssize_t)sizeof(id3header)) { |
| 63 | // If we can't even read these 10 bytes, we might as well bail |
| 64 | // out, even if there _were_ 10 bytes of valid mp3 audio data... |
| 65 | return false; |
| 66 | } |
Andreas Huber | 0bf3921 | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 67 | |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 68 | if (memcmp("ID3", id3header, 3)) { |
| 69 | break; |
| 70 | } |
| 71 | |
Andreas Huber | 0bf3921 | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 72 | // Skip the ID3v2 header. |
| 73 | |
| 74 | size_t len = |
| 75 | ((id3header[6] & 0x7f) << 21) |
| 76 | | ((id3header[7] & 0x7f) << 14) |
| 77 | | ((id3header[8] & 0x7f) << 7) |
| 78 | | (id3header[9] & 0x7f); |
| 79 | |
| 80 | len += 10; |
| 81 | |
| 82 | *inout_pos += len; |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 83 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 84 | ALOGV("skipped ID3 tag, new starting offset is %lld (0x%016llx)", |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 85 | *inout_pos, *inout_pos); |
Andreas Huber | 0bf3921 | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 86 | } |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 87 | |
| 88 | if (post_id3_pos != NULL) { |
| 89 | *post_id3_pos = *inout_pos; |
| 90 | } |
Andreas Huber | 0bf3921 | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 91 | } |
| 92 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 93 | off64_t pos = *inout_pos; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 94 | bool valid = false; |
James Dong | 7cc4977 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 95 | |
| 96 | const size_t kMaxReadBytes = 1024; |
| 97 | const size_t kMaxBytesChecked = 128 * 1024; |
| 98 | uint8_t buf[kMaxReadBytes]; |
| 99 | ssize_t bytesToRead = kMaxReadBytes; |
| 100 | ssize_t totalBytesRead = 0; |
| 101 | ssize_t remainingBytes = 0; |
| 102 | bool reachEOS = false; |
| 103 | uint8_t *tmp = buf; |
| 104 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 105 | do { |
James Dong | 7cc4977 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 106 | if (pos >= *inout_pos + kMaxBytesChecked) { |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 107 | // Don't scan forever. |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 108 | ALOGV("giving up at offset %lld", pos); |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 109 | break; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 110 | } |
| 111 | |
James Dong | 7cc4977 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 112 | if (remainingBytes < 4) { |
| 113 | if (reachEOS) { |
| 114 | break; |
| 115 | } else { |
| 116 | memcpy(buf, tmp, remainingBytes); |
| 117 | bytesToRead = kMaxReadBytes - remainingBytes; |
James Dong | e23da61 | 2011-02-24 09:16:43 -0800 | [diff] [blame] | 118 | |
| 119 | /* |
| 120 | * The next read position should start from the end of |
| 121 | * the last buffer, and thus should include the remaining |
| 122 | * bytes in the buffer. |
| 123 | */ |
| 124 | totalBytesRead = source->readAt(pos + remainingBytes, |
| 125 | buf + remainingBytes, |
| 126 | bytesToRead); |
James Dong | 7cc4977 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 127 | if (totalBytesRead <= 0) { |
| 128 | break; |
| 129 | } |
| 130 | reachEOS = (totalBytesRead != bytesToRead); |
| 131 | totalBytesRead += remainingBytes; |
| 132 | remainingBytes = totalBytesRead; |
| 133 | tmp = buf; |
| 134 | continue; |
| 135 | } |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | uint32_t header = U32_AT(tmp); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 139 | |
James Dong | d6e2729 | 2011-09-06 19:18:43 -0700 | [diff] [blame] | 140 | if (match_header != 0 && (header & kMask) != (match_header & kMask)) { |
| 141 | ++pos; |
| 142 | ++tmp; |
| 143 | --remainingBytes; |
| 144 | continue; |
| 145 | } |
| 146 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 147 | size_t frame_size; |
James Dong | d6e2729 | 2011-09-06 19:18:43 -0700 | [diff] [blame] | 148 | int sample_rate, num_channels, bitrate; |
| 149 | if (!GetMPEGAudioFrameSize( |
| 150 | header, &frame_size, |
| 151 | &sample_rate, &num_channels, &bitrate)) { |
| 152 | ++pos; |
| 153 | ++tmp; |
| 154 | --remainingBytes; |
| 155 | continue; |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 156 | } |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 157 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 158 | ALOGV("found possible 1st frame at %lld (header = 0x%08x)", pos, header); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 159 | |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 160 | // We found what looks like a valid frame, |
| 161 | // now find its successors. |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 162 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 163 | off64_t test_pos = pos + frame_size; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 164 | |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 165 | valid = true; |
| 166 | for (int j = 0; j < 3; ++j) { |
| 167 | uint8_t tmp[4]; |
Andreas Huber | 34769bc | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 168 | if (source->readAt(test_pos, tmp, 4) < 4) { |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 169 | valid = false; |
| 170 | break; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 171 | } |
Andreas Huber | 5419629 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 172 | |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 173 | uint32_t test_header = U32_AT(tmp); |
| 174 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 175 | ALOGV("subsequent header is %08x", test_header); |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 176 | |
| 177 | if ((test_header & kMask) != (header & kMask)) { |
| 178 | valid = false; |
| 179 | break; |
| 180 | } |
| 181 | |
| 182 | size_t test_frame_size; |
Andreas Huber | 386d609 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 183 | if (!GetMPEGAudioFrameSize( |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 184 | test_header, &test_frame_size)) { |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 185 | valid = false; |
| 186 | break; |
| 187 | } |
| 188 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 189 | ALOGV("found subsequent frame #%d at %lld", j + 2, test_pos); |
Andreas Huber | c8d6c8b | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 190 | |
| 191 | test_pos += test_frame_size; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | if (valid) { |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 195 | *inout_pos = pos; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 196 | |
| 197 | if (out_header != NULL) { |
| 198 | *out_header = header; |
| 199 | } |
| 200 | } else { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 201 | ALOGV("no dice, no valid sequence of frames found."); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 202 | } |
| 203 | |
Andreas Huber | ba0707d | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 204 | ++pos; |
James Dong | 7cc4977 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 205 | ++tmp; |
| 206 | --remainingBytes; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 207 | } while (!valid); |
| 208 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 209 | return valid; |
| 210 | } |
| 211 | |
| 212 | class MP3Source : public MediaSource { |
| 213 | public: |
| 214 | MP3Source( |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 215 | const sp<MetaData> &meta, const sp<DataSource> &source, |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 216 | off64_t first_frame_pos, uint32_t fixed_header, |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 217 | const sp<MP3Seeker> &seeker); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 218 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 219 | virtual status_t start(MetaData *params = NULL); |
| 220 | virtual status_t stop(); |
| 221 | |
| 222 | virtual sp<MetaData> getFormat(); |
| 223 | |
| 224 | virtual status_t read( |
| 225 | MediaBuffer **buffer, const ReadOptions *options = NULL); |
| 226 | |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 227 | protected: |
| 228 | virtual ~MP3Source(); |
| 229 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 230 | private: |
John Grossman | ab736e1 | 2012-08-29 14:51:01 -0700 | [diff] [blame] | 231 | static const size_t kMaxFrameSize; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 232 | sp<MetaData> mMeta; |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 233 | sp<DataSource> mDataSource; |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 234 | off64_t mFirstFramePos; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 235 | uint32_t mFixedHeader; |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 236 | off64_t mCurrentPos; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 237 | int64_t mCurrentTimeUs; |
| 238 | bool mStarted; |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 239 | sp<MP3Seeker> mSeeker; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 240 | MediaBufferGroup *mGroup; |
| 241 | |
Jason Simmons | a9e05b9 | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 242 | int64_t mBasisTimeUs; |
| 243 | int64_t mSamplesRead; |
| 244 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 245 | MP3Source(const MP3Source &); |
| 246 | MP3Source &operator=(const MP3Source &); |
| 247 | }; |
| 248 | |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 249 | MP3Extractor::MP3Extractor( |
| 250 | const sp<DataSource> &source, const sp<AMessage> &meta) |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 251 | : mInitCheck(NO_INIT), |
| 252 | mDataSource(source), |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 253 | mFirstFramePos(-1), |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 254 | mFixedHeader(0) { |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 255 | off64_t pos = 0; |
| 256 | off64_t post_id3_pos; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 257 | uint32_t header; |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 258 | bool success; |
| 259 | |
| 260 | int64_t meta_offset; |
| 261 | uint32_t meta_header; |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 262 | int64_t meta_post_id3_offset; |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 263 | if (meta != NULL |
| 264 | && meta->findInt64("offset", &meta_offset) |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 265 | && meta->findInt32("header", (int32_t *)&meta_header) |
| 266 | && meta->findInt64("post-id3-offset", &meta_post_id3_offset)) { |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 267 | // The sniffer has already done all the hard work for us, simply |
| 268 | // accept its judgement. |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 269 | pos = (off64_t)meta_offset; |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 270 | header = meta_header; |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 271 | post_id3_pos = (off64_t)meta_post_id3_offset; |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 272 | |
| 273 | success = true; |
| 274 | } else { |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 275 | success = Resync(mDataSource, 0, &pos, &post_id3_pos, &header); |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 276 | } |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 277 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 278 | if (!success) { |
| 279 | // mInitCheck will remain NO_INIT |
| 280 | return; |
| 281 | } |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 282 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 283 | mFirstFramePos = pos; |
| 284 | mFixedHeader = header; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 285 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 286 | size_t frame_size; |
| 287 | int sample_rate; |
| 288 | int num_channels; |
| 289 | int bitrate; |
Andreas Huber | 386d609 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 290 | GetMPEGAudioFrameSize( |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 291 | header, &frame_size, &sample_rate, &num_channels, &bitrate); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 292 | |
Andreas Huber | 2944eca | 2011-09-08 14:12:44 -0700 | [diff] [blame] | 293 | unsigned layer = 4 - ((header >> 17) & 3); |
| 294 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 295 | mMeta = new MetaData; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 296 | |
Andreas Huber | 2944eca | 2011-09-08 14:12:44 -0700 | [diff] [blame] | 297 | switch (layer) { |
| 298 | case 1: |
| 299 | mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_I); |
| 300 | break; |
| 301 | case 2: |
| 302 | mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_II); |
| 303 | break; |
| 304 | case 3: |
| 305 | mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG); |
| 306 | break; |
| 307 | default: |
| 308 | TRESPASS(); |
| 309 | } |
| 310 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 311 | mMeta->setInt32(kKeySampleRate, sample_rate); |
| 312 | mMeta->setInt32(kKeyBitRate, bitrate * 1000); |
| 313 | mMeta->setInt32(kKeyChannelCount, num_channels); |
| 314 | |
Marco Nelissen | b636abd | 2012-03-19 13:49:43 -0700 | [diff] [blame] | 315 | sp<XINGSeeker> seeker = XINGSeeker::CreateFromSource(mDataSource, mFirstFramePos); |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 316 | |
Marco Nelissen | b636abd | 2012-03-19 13:49:43 -0700 | [diff] [blame] | 317 | if (seeker == NULL) { |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 318 | mSeeker = VBRISeeker::CreateFromSource(mDataSource, post_id3_pos); |
Marco Nelissen | b636abd | 2012-03-19 13:49:43 -0700 | [diff] [blame] | 319 | } else { |
| 320 | mSeeker = seeker; |
| 321 | int encd = seeker->getEncoderDelay(); |
| 322 | int encp = seeker->getEncoderPadding(); |
| 323 | if (encd != 0 || encp != 0) { |
| 324 | mMeta->setInt32(kKeyEncoderDelay, encd); |
| 325 | mMeta->setInt32(kKeyEncoderPadding, encp); |
| 326 | } |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 327 | } |
| 328 | |
Marco Nelissen | 9e50385 | 2012-03-16 07:56:42 -0700 | [diff] [blame] | 329 | if (mSeeker != NULL) { |
| 330 | // While it is safe to send the XING/VBRI frame to the decoder, this will |
| 331 | // result in an extra 1152 samples being output. The real first frame to |
| 332 | // decode is after the XING/VBRI frame, so skip there. |
| 333 | mFirstFramePos += frame_size; |
| 334 | } |
| 335 | |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 336 | int64_t durationUs; |
| 337 | |
| 338 | if (mSeeker == NULL || !mSeeker->getDuration(&durationUs)) { |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 339 | off64_t fileSize; |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 340 | if (mDataSource->getSize(&fileSize) == OK) { |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 341 | durationUs = 8000LL * (fileSize - mFirstFramePos) / bitrate; |
| 342 | } else { |
| 343 | durationUs = -1; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 344 | } |
| 345 | } |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 346 | |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 347 | if (durationUs >= 0) { |
| 348 | mMeta->setInt64(kKeyDuration, durationUs); |
| 349 | } |
| 350 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 351 | mInitCheck = OK; |
Marco Nelissen | 092406a | 2012-03-20 09:48:02 -0700 | [diff] [blame] | 352 | |
Dylan Powers | 6e8f0bc | 2012-11-27 16:06:38 -0800 | [diff] [blame] | 353 | // Get iTunes-style gapless info if present. |
| 354 | // When getting the id3 tag, skip the V1 tags to prevent the source cache |
| 355 | // from being iterated to the end of the file. |
| 356 | ID3 id3(mDataSource, true); |
Marco Nelissen | 092406a | 2012-03-20 09:48:02 -0700 | [diff] [blame] | 357 | if (id3.isValid()) { |
| 358 | ID3::Iterator *com = new ID3::Iterator(id3, "COM"); |
| 359 | if (com->done()) { |
| 360 | delete com; |
| 361 | com = new ID3::Iterator(id3, "COMM"); |
| 362 | } |
| 363 | while(!com->done()) { |
| 364 | String8 commentdesc; |
| 365 | String8 commentvalue; |
| 366 | com->getString(&commentdesc, &commentvalue); |
| 367 | const char * desc = commentdesc.string(); |
| 368 | const char * value = commentvalue.string(); |
| 369 | |
| 370 | // first 3 characters are the language, which we don't care about |
| 371 | if(strlen(desc) > 3 && strcmp(desc + 3, "iTunSMPB") == 0) { |
| 372 | |
| 373 | int32_t delay, padding; |
| 374 | if (sscanf(value, " %*x %x %x %*x", &delay, &padding) == 2) { |
| 375 | mMeta->setInt32(kKeyEncoderDelay, delay); |
| 376 | mMeta->setInt32(kKeyEncoderPadding, padding); |
| 377 | } |
| 378 | break; |
| 379 | } |
| 380 | com->next(); |
| 381 | } |
| 382 | delete com; |
| 383 | com = NULL; |
| 384 | } |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 385 | } |
| 386 | |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 387 | size_t MP3Extractor::countTracks() { |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 388 | return mInitCheck != OK ? 0 : 1; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 389 | } |
| 390 | |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 391 | sp<MediaSource> MP3Extractor::getTrack(size_t index) { |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 392 | if (mInitCheck != OK || index != 0) { |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 393 | return NULL; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 396 | return new MP3Source( |
Gloria Wang | ac6e656 | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 397 | mMeta, mDataSource, mFirstFramePos, mFixedHeader, |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 398 | mSeeker); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 399 | } |
| 400 | |
Andreas Huber | 7e04dcf | 2009-10-22 13:49:30 -0700 | [diff] [blame] | 401 | sp<MetaData> MP3Extractor::getTrackMetaData(size_t index, uint32_t flags) { |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 402 | if (mInitCheck != OK || index != 0) { |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 403 | return NULL; |
| 404 | } |
| 405 | |
| 406 | return mMeta; |
| 407 | } |
| 408 | |
| 409 | //////////////////////////////////////////////////////////////////////////////// |
| 410 | |
John Grossman | ab736e1 | 2012-08-29 14:51:01 -0700 | [diff] [blame] | 411 | // The theoretical maximum frame size for an MPEG audio stream should occur |
| 412 | // while playing a Layer 2, MPEGv2.5 audio stream at 160kbps (with padding). |
| 413 | // The size of this frame should be... |
| 414 | // ((1152 samples/frame * 160000 bits/sec) / |
| 415 | // (8000 samples/sec * 8 bits/byte)) + 1 padding byte/frame = 2881 bytes/frame. |
| 416 | // Set our max frame size to the nearest power of 2 above this size (aka, 4kB) |
| 417 | const size_t MP3Source::kMaxFrameSize = (1 << 12); /* 4096 bytes */ |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 418 | MP3Source::MP3Source( |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 419 | const sp<MetaData> &meta, const sp<DataSource> &source, |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 420 | off64_t first_frame_pos, uint32_t fixed_header, |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 421 | const sp<MP3Seeker> &seeker) |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 422 | : mMeta(meta), |
| 423 | mDataSource(source), |
| 424 | mFirstFramePos(first_frame_pos), |
| 425 | mFixedHeader(fixed_header), |
| 426 | mCurrentPos(0), |
| 427 | mCurrentTimeUs(0), |
| 428 | mStarted(false), |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 429 | mSeeker(seeker), |
Jason Simmons | a9e05b9 | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 430 | mGroup(NULL), |
| 431 | mBasisTimeUs(0), |
| 432 | mSamplesRead(0) { |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | MP3Source::~MP3Source() { |
| 436 | if (mStarted) { |
| 437 | stop(); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | status_t MP3Source::start(MetaData *) { |
Andreas Huber | 0c89199 | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 442 | CHECK(!mStarted); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 443 | |
| 444 | mGroup = new MediaBufferGroup; |
| 445 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 446 | mGroup->add_buffer(new MediaBuffer(kMaxFrameSize)); |
| 447 | |
| 448 | mCurrentPos = mFirstFramePos; |
| 449 | mCurrentTimeUs = 0; |
| 450 | |
Jason Simmons | a9e05b9 | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 451 | mBasisTimeUs = mCurrentTimeUs; |
| 452 | mSamplesRead = 0; |
| 453 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 454 | mStarted = true; |
| 455 | |
| 456 | return OK; |
| 457 | } |
| 458 | |
| 459 | status_t MP3Source::stop() { |
Andreas Huber | 0c89199 | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 460 | CHECK(mStarted); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 461 | |
| 462 | delete mGroup; |
| 463 | mGroup = NULL; |
| 464 | |
| 465 | mStarted = false; |
| 466 | |
| 467 | return OK; |
| 468 | } |
| 469 | |
| 470 | sp<MetaData> MP3Source::getFormat() { |
| 471 | return mMeta; |
| 472 | } |
| 473 | |
| 474 | status_t MP3Source::read( |
| 475 | MediaBuffer **out, const ReadOptions *options) { |
| 476 | *out = NULL; |
| 477 | |
| 478 | int64_t seekTimeUs; |
Andreas Huber | abd1f4f | 2010-07-20 15:04:28 -0700 | [diff] [blame] | 479 | ReadOptions::SeekMode mode; |
Gloria Wang | f9d566e | 2011-07-27 14:10:53 -0700 | [diff] [blame] | 480 | bool seekCBR = false; |
| 481 | |
Andreas Huber | abd1f4f | 2010-07-20 15:04:28 -0700 | [diff] [blame] | 482 | if (options != NULL && options->getSeekTo(&seekTimeUs, &mode)) { |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 483 | int64_t actualSeekTimeUs = seekTimeUs; |
| 484 | if (mSeeker == NULL |
| 485 | || !mSeeker->getOffsetForTime(&actualSeekTimeUs, &mCurrentPos)) { |
| 486 | int32_t bitrate; |
| 487 | if (!mMeta->findInt32(kKeyBitRate, &bitrate)) { |
| 488 | // bitrate is in bits/sec. |
Steve Block | df64d15 | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 489 | ALOGI("no bitrate"); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 490 | |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 491 | return ERROR_UNSUPPORTED; |
Gloria Wang | ac6e656 | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 492 | } |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 493 | |
| 494 | mCurrentTimeUs = seekTimeUs; |
Gloria Wang | ac6e656 | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 495 | mCurrentPos = mFirstFramePos + seekTimeUs * bitrate / 8000000; |
Gloria Wang | f9d566e | 2011-07-27 14:10:53 -0700 | [diff] [blame] | 496 | seekCBR = true; |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 497 | } else { |
| 498 | mCurrentTimeUs = actualSeekTimeUs; |
Gloria Wang | ac6e656 | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 499 | } |
Jason Simmons | a9e05b9 | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 500 | |
| 501 | mBasisTimeUs = mCurrentTimeUs; |
| 502 | mSamplesRead = 0; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | MediaBuffer *buffer; |
| 506 | status_t err = mGroup->acquire_buffer(&buffer); |
| 507 | if (err != OK) { |
| 508 | return err; |
| 509 | } |
| 510 | |
| 511 | size_t frame_size; |
Andreas Huber | 3e0339f | 2010-06-23 11:11:58 -0700 | [diff] [blame] | 512 | int bitrate; |
Jason Simmons | a9e05b9 | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 513 | int num_samples; |
| 514 | int sample_rate; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 515 | for (;;) { |
Andreas Huber | 34769bc | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 516 | ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), 4); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 517 | if (n < 4) { |
| 518 | buffer->release(); |
| 519 | buffer = NULL; |
| 520 | |
| 521 | return ERROR_END_OF_STREAM; |
| 522 | } |
| 523 | |
| 524 | uint32_t header = U32_AT((const uint8_t *)buffer->data()); |
Andreas Huber | 5419629 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 525 | |
| 526 | if ((header & kMask) == (mFixedHeader & kMask) |
Andreas Huber | 386d609 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 527 | && GetMPEGAudioFrameSize( |
| 528 | header, &frame_size, &sample_rate, NULL, |
| 529 | &bitrate, &num_samples)) { |
Gloria Wang | f9d566e | 2011-07-27 14:10:53 -0700 | [diff] [blame] | 530 | |
| 531 | // re-calculate mCurrentTimeUs because we might have called Resync() |
| 532 | if (seekCBR) { |
| 533 | mCurrentTimeUs = (mCurrentPos - mFirstFramePos) * 8000 / bitrate; |
| 534 | mBasisTimeUs = mCurrentTimeUs; |
| 535 | } |
| 536 | |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 537 | break; |
| 538 | } |
| 539 | |
| 540 | // Lost sync. |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 541 | ALOGV("lost sync! header = 0x%08x, old header = 0x%08x\n", header, mFixedHeader); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 542 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 543 | off64_t pos = mCurrentPos; |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 544 | if (!Resync(mDataSource, mFixedHeader, &pos, NULL, NULL)) { |
Steve Block | 29357bc | 2012-01-06 19:20:56 +0000 | [diff] [blame] | 545 | ALOGE("Unable to resync. Signalling end of stream."); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 546 | |
| 547 | buffer->release(); |
| 548 | buffer = NULL; |
| 549 | |
| 550 | return ERROR_END_OF_STREAM; |
| 551 | } |
| 552 | |
| 553 | mCurrentPos = pos; |
| 554 | |
| 555 | // Try again with the new position. |
| 556 | } |
| 557 | |
Andreas Huber | 0c89199 | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 558 | CHECK(frame_size <= buffer->size()); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 559 | |
Andreas Huber | 34769bc | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 560 | ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), frame_size); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 561 | if (n < (ssize_t)frame_size) { |
| 562 | buffer->release(); |
| 563 | buffer = NULL; |
| 564 | |
| 565 | return ERROR_END_OF_STREAM; |
| 566 | } |
| 567 | |
| 568 | buffer->set_range(0, frame_size); |
| 569 | |
Andreas Huber | 48c948b | 2009-10-08 10:07:49 -0700 | [diff] [blame] | 570 | buffer->meta_data()->setInt64(kKeyTime, mCurrentTimeUs); |
Andreas Huber | 8bf59e7 | 2010-08-06 14:13:10 -0700 | [diff] [blame] | 571 | buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 572 | |
| 573 | mCurrentPos += frame_size; |
Jason Simmons | a9e05b9 | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 574 | |
| 575 | mSamplesRead += num_samples; |
| 576 | mCurrentTimeUs = mBasisTimeUs + ((mSamplesRead * 1000000) / sample_rate); |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 577 | |
| 578 | *out = buffer; |
| 579 | |
| 580 | return OK; |
| 581 | } |
| 582 | |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 583 | sp<MetaData> MP3Extractor::getMetaData() { |
| 584 | sp<MetaData> meta = new MetaData; |
| 585 | |
Andreas Huber | 772bcc2 | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 586 | if (mInitCheck != OK) { |
Andreas Huber | 7be6407 | 2010-01-13 11:25:10 -0800 | [diff] [blame] | 587 | return meta; |
| 588 | } |
| 589 | |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 590 | meta->setCString(kKeyMIMEType, "audio/mpeg"); |
| 591 | |
| 592 | ID3 id3(mDataSource); |
| 593 | |
| 594 | if (!id3.isValid()) { |
| 595 | return meta; |
| 596 | } |
| 597 | |
| 598 | struct Map { |
| 599 | int key; |
| 600 | const char *tag1; |
| 601 | const char *tag2; |
| 602 | }; |
| 603 | static const Map kMap[] = { |
| 604 | { kKeyAlbum, "TALB", "TAL" }, |
| 605 | { kKeyArtist, "TPE1", "TP1" }, |
Marco Nelissen | 66ac4df | 2010-02-11 13:31:44 -0800 | [diff] [blame] | 606 | { kKeyAlbumArtist, "TPE2", "TP2" }, |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 607 | { kKeyComposer, "TCOM", "TCM" }, |
| 608 | { kKeyGenre, "TCON", "TCO" }, |
Andreas Huber | bd4bc59 | 2010-01-13 10:45:49 -0800 | [diff] [blame] | 609 | { kKeyTitle, "TIT2", "TT2" }, |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 610 | { kKeyYear, "TYE", "TYER" }, |
Andreas Huber | bd4bc59 | 2010-01-13 10:45:49 -0800 | [diff] [blame] | 611 | { kKeyAuthor, "TXT", "TEXT" }, |
| 612 | { kKeyCDTrackNumber, "TRK", "TRCK" }, |
Marco Nelissen | 6c8a9a4 | 2010-02-08 14:50:19 -0800 | [diff] [blame] | 613 | { kKeyDiscNumber, "TPA", "TPOS" }, |
Marco Nelissen | 11f8109 | 2011-01-06 11:12:17 -0800 | [diff] [blame] | 614 | { kKeyCompilation, "TCP", "TCMP" }, |
Andreas Huber | fc9ba09 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 615 | }; |
| 616 | static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]); |
| 617 | |
| 618 | for (size_t i = 0; i < kNumMapEntries; ++i) { |
| 619 | ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1); |
| 620 | if (it->done()) { |
| 621 | delete it; |
| 622 | it = new ID3::Iterator(id3, kMap[i].tag2); |
| 623 | } |
| 624 | |
| 625 | if (it->done()) { |
| 626 | delete it; |
| 627 | continue; |
| 628 | } |
| 629 | |
| 630 | String8 s; |
| 631 | it->getString(&s); |
| 632 | delete it; |
| 633 | |
| 634 | meta->setCString(kMap[i].key, s); |
| 635 | } |
| 636 | |
| 637 | size_t dataSize; |
| 638 | String8 mime; |
| 639 | const void *data = id3.getAlbumArt(&dataSize, &mime); |
| 640 | |
| 641 | if (data) { |
| 642 | meta->setData(kKeyAlbumArt, MetaData::TYPE_NONE, data, dataSize); |
| 643 | meta->setCString(kKeyAlbumArtMIME, mime.string()); |
| 644 | } |
| 645 | |
| 646 | return meta; |
| 647 | } |
| 648 | |
Andreas Huber | 693d271 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 649 | bool SniffMP3( |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 650 | const sp<DataSource> &source, String8 *mimeType, |
| 651 | float *confidence, sp<AMessage> *meta) { |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 652 | off64_t pos = 0; |
| 653 | off64_t post_id3_pos; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 654 | uint32_t header; |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 655 | if (!Resync(source, 0, &pos, &post_id3_pos, &header)) { |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 656 | return false; |
| 657 | } |
| 658 | |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 659 | *meta = new AMessage; |
| 660 | (*meta)->setInt64("offset", pos); |
| 661 | (*meta)->setInt32("header", header); |
Andreas Huber | 4456da5 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 662 | (*meta)->setInt64("post-id3-offset", post_id3_pos); |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 663 | |
Andreas Huber | 18291bc | 2009-09-10 14:13:30 -0700 | [diff] [blame] | 664 | *mimeType = MEDIA_MIMETYPE_AUDIO_MPEG; |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 665 | *confidence = 0.2f; |
Andreas Huber | 20111aa | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 666 | |
| 667 | return true; |
| 668 | } |
| 669 | |
| 670 | } // namespace android |