Andreas Huber | e46b7be | 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 | 57515f3 | 2009-10-23 09:55:10 -0700 | [diff] [blame] | 21 | #include "include/MP3Extractor.h" |
| 22 | |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 23 | #include "include/ID3.h" |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 24 | #include "include/VBRISeeker.h" |
| 25 | #include "include/XINGSeeker.h" |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 26 | |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 27 | #include <media/stagefright/foundation/AMessage.h> |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 28 | #include <media/stagefright/DataSource.h> |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 29 | #include <media/stagefright/MediaBuffer.h> |
| 30 | #include <media/stagefright/MediaBufferGroup.h> |
Andreas Huber | b5ceb9e | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 31 | #include <media/stagefright/MediaDebug.h> |
Andreas Huber | e6c4096 | 2009-09-10 14:13:30 -0700 | [diff] [blame] | 32 | #include <media/stagefright/MediaDefs.h> |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 33 | #include <media/stagefright/MediaErrors.h> |
| 34 | #include <media/stagefright/MediaSource.h> |
| 35 | #include <media/stagefright/MetaData.h> |
| 36 | #include <media/stagefright/Utils.h> |
| 37 | #include <utils/String8.h> |
| 38 | |
| 39 | namespace android { |
| 40 | |
Andreas Huber | b16e554 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 41 | // Everything must match except for |
James Dong | 858b673 | 2011-03-04 11:25:17 -0800 | [diff] [blame] | 42 | // protection, bitrate, padding, private bits, mode, mode extension, |
Andreas Huber | 1d200e3 | 2010-03-04 16:49:03 -0800 | [diff] [blame] | 43 | // copyright bit, original bit and emphasis. |
| 44 | // Yes ... there are things that must indeed match... |
James Dong | 858b673 | 2011-03-04 11:25:17 -0800 | [diff] [blame] | 45 | static const uint32_t kMask = 0xfffe0c00; |
Andreas Huber | b16e554 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 46 | |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 47 | // static |
| 48 | bool MP3Extractor::get_mp3_frame_size( |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 49 | uint32_t header, size_t *frame_size, |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 50 | int *out_sampling_rate, int *out_channels, |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 51 | int *out_bitrate, int *out_num_samples) { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 52 | *frame_size = 0; |
| 53 | |
| 54 | if (out_sampling_rate) { |
| 55 | *out_sampling_rate = 0; |
| 56 | } |
| 57 | |
| 58 | if (out_channels) { |
| 59 | *out_channels = 0; |
| 60 | } |
| 61 | |
| 62 | if (out_bitrate) { |
| 63 | *out_bitrate = 0; |
| 64 | } |
| 65 | |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 66 | if (out_num_samples) { |
| 67 | *out_num_samples = 1152; |
| 68 | } |
| 69 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 70 | if ((header & 0xffe00000) != 0xffe00000) { |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | unsigned version = (header >> 19) & 3; |
| 75 | |
| 76 | if (version == 0x01) { |
| 77 | return false; |
| 78 | } |
Andreas Huber | b16e554 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 79 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 80 | unsigned layer = (header >> 17) & 3; |
| 81 | |
| 82 | if (layer == 0x00) { |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | unsigned protection = (header >> 16) & 1; |
| 87 | |
| 88 | unsigned bitrate_index = (header >> 12) & 0x0f; |
| 89 | |
| 90 | if (bitrate_index == 0 || bitrate_index == 0x0f) { |
| 91 | // Disallow "free" bitrate. |
| 92 | return false; |
| 93 | } |
| 94 | |
| 95 | unsigned sampling_rate_index = (header >> 10) & 3; |
| 96 | |
| 97 | if (sampling_rate_index == 3) { |
| 98 | return false; |
| 99 | } |
| 100 | |
| 101 | static const int kSamplingRateV1[] = { 44100, 48000, 32000 }; |
| 102 | int sampling_rate = kSamplingRateV1[sampling_rate_index]; |
| 103 | if (version == 2 /* V2 */) { |
| 104 | sampling_rate /= 2; |
| 105 | } else if (version == 0 /* V2.5 */) { |
| 106 | sampling_rate /= 4; |
| 107 | } |
| 108 | |
| 109 | unsigned padding = (header >> 9) & 1; |
| 110 | |
| 111 | if (layer == 3) { |
| 112 | // layer I |
| 113 | |
| 114 | static const int kBitrateV1[] = { |
| 115 | 32, 64, 96, 128, 160, 192, 224, 256, |
| 116 | 288, 320, 352, 384, 416, 448 |
| 117 | }; |
| 118 | |
| 119 | static const int kBitrateV2[] = { |
| 120 | 32, 48, 56, 64, 80, 96, 112, 128, |
| 121 | 144, 160, 176, 192, 224, 256 |
| 122 | }; |
| 123 | |
| 124 | int bitrate = |
| 125 | (version == 3 /* V1 */) |
| 126 | ? kBitrateV1[bitrate_index - 1] |
| 127 | : kBitrateV2[bitrate_index - 1]; |
| 128 | |
| 129 | if (out_bitrate) { |
| 130 | *out_bitrate = bitrate; |
| 131 | } |
| 132 | |
| 133 | *frame_size = (12000 * bitrate / sampling_rate + padding) * 4; |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 134 | |
| 135 | if (out_num_samples) { |
| 136 | *out_num_samples = 384; |
| 137 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 138 | } else { |
| 139 | // layer II or III |
| 140 | |
| 141 | static const int kBitrateV1L2[] = { |
| 142 | 32, 48, 56, 64, 80, 96, 112, 128, |
| 143 | 160, 192, 224, 256, 320, 384 |
| 144 | }; |
| 145 | |
| 146 | static const int kBitrateV1L3[] = { |
| 147 | 32, 40, 48, 56, 64, 80, 96, 112, |
| 148 | 128, 160, 192, 224, 256, 320 |
| 149 | }; |
| 150 | |
| 151 | static const int kBitrateV2[] = { |
| 152 | 8, 16, 24, 32, 40, 48, 56, 64, |
| 153 | 80, 96, 112, 128, 144, 160 |
| 154 | }; |
| 155 | |
| 156 | int bitrate; |
| 157 | if (version == 3 /* V1 */) { |
| 158 | bitrate = (layer == 2 /* L2 */) |
| 159 | ? kBitrateV1L2[bitrate_index - 1] |
| 160 | : kBitrateV1L3[bitrate_index - 1]; |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 161 | |
| 162 | if (out_num_samples) { |
| 163 | *out_num_samples = 1152; |
| 164 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 165 | } else { |
| 166 | // V2 (or 2.5) |
| 167 | |
| 168 | bitrate = kBitrateV2[bitrate_index - 1]; |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 169 | if (out_num_samples) { |
| 170 | *out_num_samples = 576; |
| 171 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | if (out_bitrate) { |
| 175 | *out_bitrate = bitrate; |
| 176 | } |
| 177 | |
Andreas Huber | 63f20ec | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 178 | if (version == 3 /* V1 */) { |
| 179 | *frame_size = 144000 * bitrate / sampling_rate + padding; |
| 180 | } else { |
| 181 | // V2 or V2.5 |
| 182 | *frame_size = 72000 * bitrate / sampling_rate + padding; |
| 183 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | if (out_sampling_rate) { |
| 187 | *out_sampling_rate = sampling_rate; |
| 188 | } |
| 189 | |
| 190 | if (out_channels) { |
| 191 | int channel_mode = (header >> 6) & 3; |
| 192 | |
| 193 | *out_channels = (channel_mode == 3) ? 1 : 2; |
| 194 | } |
| 195 | |
| 196 | return true; |
| 197 | } |
| 198 | |
| 199 | static bool Resync( |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 200 | const sp<DataSource> &source, uint32_t match_header, |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 201 | off64_t *inout_pos, off64_t *post_id3_pos, uint32_t *out_header) { |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 202 | if (post_id3_pos != NULL) { |
| 203 | *post_id3_pos = 0; |
| 204 | } |
| 205 | |
Andreas Huber | 63f20ec | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 206 | if (*inout_pos == 0) { |
| 207 | // Skip an optional ID3 header if syncing at the very beginning |
| 208 | // of the datasource. |
| 209 | |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 210 | for (;;) { |
| 211 | uint8_t id3header[10]; |
| 212 | if (source->readAt(*inout_pos, id3header, sizeof(id3header)) |
| 213 | < (ssize_t)sizeof(id3header)) { |
| 214 | // If we can't even read these 10 bytes, we might as well bail |
| 215 | // out, even if there _were_ 10 bytes of valid mp3 audio data... |
| 216 | return false; |
| 217 | } |
Andreas Huber | 63f20ec | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 218 | |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 219 | if (memcmp("ID3", id3header, 3)) { |
| 220 | break; |
| 221 | } |
| 222 | |
Andreas Huber | 63f20ec | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 223 | // Skip the ID3v2 header. |
| 224 | |
| 225 | size_t len = |
| 226 | ((id3header[6] & 0x7f) << 21) |
| 227 | | ((id3header[7] & 0x7f) << 14) |
| 228 | | ((id3header[8] & 0x7f) << 7) |
| 229 | | (id3header[9] & 0x7f); |
| 230 | |
| 231 | len += 10; |
| 232 | |
| 233 | *inout_pos += len; |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 234 | |
James Dong | 563ab6e | 2011-02-24 09:16:43 -0800 | [diff] [blame] | 235 | LOGV("skipped ID3 tag, new starting offset is %lld (0x%016llx)", |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 236 | *inout_pos, *inout_pos); |
Andreas Huber | 63f20ec | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 237 | } |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 238 | |
| 239 | if (post_id3_pos != NULL) { |
| 240 | *post_id3_pos = *inout_pos; |
| 241 | } |
Andreas Huber | 63f20ec | 2009-10-12 15:48:51 -0700 | [diff] [blame] | 242 | } |
| 243 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 244 | off64_t pos = *inout_pos; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 245 | bool valid = false; |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 246 | |
| 247 | const size_t kMaxReadBytes = 1024; |
| 248 | const size_t kMaxBytesChecked = 128 * 1024; |
| 249 | uint8_t buf[kMaxReadBytes]; |
| 250 | ssize_t bytesToRead = kMaxReadBytes; |
| 251 | ssize_t totalBytesRead = 0; |
| 252 | ssize_t remainingBytes = 0; |
| 253 | bool reachEOS = false; |
| 254 | uint8_t *tmp = buf; |
| 255 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 256 | do { |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 257 | if (pos >= *inout_pos + kMaxBytesChecked) { |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 258 | // Don't scan forever. |
James Dong | 563ab6e | 2011-02-24 09:16:43 -0800 | [diff] [blame] | 259 | LOGV("giving up at offset %lld", pos); |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 260 | break; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 261 | } |
| 262 | |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 263 | if (remainingBytes < 4) { |
| 264 | if (reachEOS) { |
| 265 | break; |
| 266 | } else { |
| 267 | memcpy(buf, tmp, remainingBytes); |
| 268 | bytesToRead = kMaxReadBytes - remainingBytes; |
James Dong | 563ab6e | 2011-02-24 09:16:43 -0800 | [diff] [blame] | 269 | |
| 270 | /* |
| 271 | * The next read position should start from the end of |
| 272 | * the last buffer, and thus should include the remaining |
| 273 | * bytes in the buffer. |
| 274 | */ |
| 275 | totalBytesRead = source->readAt(pos + remainingBytes, |
| 276 | buf + remainingBytes, |
| 277 | bytesToRead); |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 278 | if (totalBytesRead <= 0) { |
| 279 | break; |
| 280 | } |
| 281 | reachEOS = (totalBytesRead != bytesToRead); |
| 282 | totalBytesRead += remainingBytes; |
| 283 | remainingBytes = totalBytesRead; |
| 284 | tmp = buf; |
| 285 | continue; |
| 286 | } |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | uint32_t header = U32_AT(tmp); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 290 | |
| 291 | if (match_header != 0 && (header & kMask) != (match_header & kMask)) { |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 292 | ++pos; |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 293 | ++tmp; |
| 294 | --remainingBytes; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 295 | continue; |
| 296 | } |
| 297 | |
| 298 | size_t frame_size; |
| 299 | int sample_rate, num_channels, bitrate; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 300 | if (!MP3Extractor::get_mp3_frame_size( |
| 301 | header, &frame_size, |
| 302 | &sample_rate, &num_channels, &bitrate)) { |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 303 | ++pos; |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 304 | ++tmp; |
| 305 | --remainingBytes; |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 306 | continue; |
| 307 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 308 | |
James Dong | 563ab6e | 2011-02-24 09:16:43 -0800 | [diff] [blame] | 309 | LOGV("found possible 1st frame at %lld (header = 0x%08x)", pos, header); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 310 | |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 311 | // We found what looks like a valid frame, |
| 312 | // now find its successors. |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 313 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 314 | off64_t test_pos = pos + frame_size; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 315 | |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 316 | valid = true; |
| 317 | for (int j = 0; j < 3; ++j) { |
| 318 | uint8_t tmp[4]; |
Andreas Huber | 9a12baf | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 319 | if (source->readAt(test_pos, tmp, 4) < 4) { |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 320 | valid = false; |
| 321 | break; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 322 | } |
Andreas Huber | b16e554 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 323 | |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 324 | uint32_t test_header = U32_AT(tmp); |
| 325 | |
| 326 | LOGV("subsequent header is %08x", test_header); |
| 327 | |
| 328 | if ((test_header & kMask) != (header & kMask)) { |
| 329 | valid = false; |
| 330 | break; |
| 331 | } |
| 332 | |
| 333 | size_t test_frame_size; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 334 | if (!MP3Extractor::get_mp3_frame_size( |
| 335 | test_header, &test_frame_size)) { |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 336 | valid = false; |
| 337 | break; |
| 338 | } |
| 339 | |
James Dong | 563ab6e | 2011-02-24 09:16:43 -0800 | [diff] [blame] | 340 | LOGV("found subsequent frame #%d at %lld", j + 2, test_pos); |
Andreas Huber | 2e337a4 | 2009-07-17 08:28:57 -0700 | [diff] [blame] | 341 | |
| 342 | test_pos += test_frame_size; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | if (valid) { |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 346 | *inout_pos = pos; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 347 | |
| 348 | if (out_header != NULL) { |
| 349 | *out_header = header; |
| 350 | } |
| 351 | } else { |
| 352 | LOGV("no dice, no valid sequence of frames found."); |
| 353 | } |
| 354 | |
Andreas Huber | 0d34d8b | 2010-03-31 11:08:23 -0700 | [diff] [blame] | 355 | ++pos; |
James Dong | 31d8a03 | 2011-01-11 18:59:32 -0800 | [diff] [blame] | 356 | ++tmp; |
| 357 | --remainingBytes; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 358 | } while (!valid); |
| 359 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 360 | return valid; |
| 361 | } |
| 362 | |
| 363 | class MP3Source : public MediaSource { |
| 364 | public: |
| 365 | MP3Source( |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 366 | const sp<MetaData> &meta, const sp<DataSource> &source, |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 367 | off64_t first_frame_pos, uint32_t fixed_header, |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 368 | const sp<MP3Seeker> &seeker); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 369 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 370 | virtual status_t start(MetaData *params = NULL); |
| 371 | virtual status_t stop(); |
| 372 | |
| 373 | virtual sp<MetaData> getFormat(); |
| 374 | |
| 375 | virtual status_t read( |
| 376 | MediaBuffer **buffer, const ReadOptions *options = NULL); |
| 377 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 378 | protected: |
| 379 | virtual ~MP3Source(); |
| 380 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 381 | private: |
| 382 | sp<MetaData> mMeta; |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 383 | sp<DataSource> mDataSource; |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 384 | off64_t mFirstFramePos; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 385 | uint32_t mFixedHeader; |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 386 | off64_t mCurrentPos; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 387 | int64_t mCurrentTimeUs; |
| 388 | bool mStarted; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 389 | sp<MP3Seeker> mSeeker; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 390 | MediaBufferGroup *mGroup; |
| 391 | |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 392 | int64_t mBasisTimeUs; |
| 393 | int64_t mSamplesRead; |
| 394 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 395 | MP3Source(const MP3Source &); |
| 396 | MP3Source &operator=(const MP3Source &); |
| 397 | }; |
| 398 | |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 399 | MP3Extractor::MP3Extractor( |
| 400 | const sp<DataSource> &source, const sp<AMessage> &meta) |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 401 | : mInitCheck(NO_INIT), |
| 402 | mDataSource(source), |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 403 | mFirstFramePos(-1), |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 404 | mFixedHeader(0) { |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 405 | off64_t pos = 0; |
| 406 | off64_t post_id3_pos; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 407 | uint32_t header; |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 408 | bool success; |
| 409 | |
| 410 | int64_t meta_offset; |
| 411 | uint32_t meta_header; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 412 | int64_t meta_post_id3_offset; |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 413 | if (meta != NULL |
| 414 | && meta->findInt64("offset", &meta_offset) |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 415 | && meta->findInt32("header", (int32_t *)&meta_header) |
| 416 | && meta->findInt64("post-id3-offset", &meta_post_id3_offset)) { |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 417 | // The sniffer has already done all the hard work for us, simply |
| 418 | // accept its judgement. |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 419 | pos = (off64_t)meta_offset; |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 420 | header = meta_header; |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 421 | post_id3_pos = (off64_t)meta_post_id3_offset; |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 422 | |
| 423 | success = true; |
| 424 | } else { |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 425 | success = Resync(mDataSource, 0, &pos, &post_id3_pos, &header); |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 426 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 427 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 428 | if (!success) { |
| 429 | // mInitCheck will remain NO_INIT |
| 430 | return; |
| 431 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 432 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 433 | mFirstFramePos = pos; |
| 434 | mFixedHeader = header; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 435 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 436 | size_t frame_size; |
| 437 | int sample_rate; |
| 438 | int num_channels; |
| 439 | int bitrate; |
| 440 | get_mp3_frame_size( |
| 441 | header, &frame_size, &sample_rate, &num_channels, &bitrate); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 442 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 443 | mMeta = new MetaData; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 444 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 445 | mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG); |
| 446 | mMeta->setInt32(kKeySampleRate, sample_rate); |
| 447 | mMeta->setInt32(kKeyBitRate, bitrate * 1000); |
| 448 | mMeta->setInt32(kKeyChannelCount, num_channels); |
| 449 | |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 450 | mSeeker = XINGSeeker::CreateFromSource(mDataSource, mFirstFramePos); |
| 451 | |
| 452 | if (mSeeker == NULL) { |
| 453 | mSeeker = VBRISeeker::CreateFromSource(mDataSource, post_id3_pos); |
| 454 | } |
| 455 | |
| 456 | int64_t durationUs; |
| 457 | |
| 458 | if (mSeeker == NULL || !mSeeker->getDuration(&durationUs)) { |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 459 | off64_t fileSize; |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 460 | if (mDataSource->getSize(&fileSize) == OK) { |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 461 | durationUs = 8000LL * (fileSize - mFirstFramePos) / bitrate; |
| 462 | } else { |
| 463 | durationUs = -1; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 464 | } |
| 465 | } |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 466 | |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 467 | if (durationUs >= 0) { |
| 468 | mMeta->setInt64(kKeyDuration, durationUs); |
| 469 | } |
| 470 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 471 | mInitCheck = OK; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 472 | } |
| 473 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 474 | size_t MP3Extractor::countTracks() { |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 475 | return mInitCheck != OK ? 0 : 1; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 476 | } |
| 477 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 478 | sp<MediaSource> MP3Extractor::getTrack(size_t index) { |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 479 | if (mInitCheck != OK || index != 0) { |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 480 | return NULL; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 481 | } |
| 482 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 483 | return new MP3Source( |
Gloria Wang | 1ba307d | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 484 | mMeta, mDataSource, mFirstFramePos, mFixedHeader, |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 485 | mSeeker); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Andreas Huber | e981c33 | 2009-10-22 13:49:30 -0700 | [diff] [blame] | 488 | sp<MetaData> MP3Extractor::getTrackMetaData(size_t index, uint32_t flags) { |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 489 | if (mInitCheck != OK || index != 0) { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 490 | return NULL; |
| 491 | } |
| 492 | |
| 493 | return mMeta; |
| 494 | } |
| 495 | |
| 496 | //////////////////////////////////////////////////////////////////////////////// |
| 497 | |
| 498 | MP3Source::MP3Source( |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 499 | const sp<MetaData> &meta, const sp<DataSource> &source, |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 500 | off64_t first_frame_pos, uint32_t fixed_header, |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 501 | const sp<MP3Seeker> &seeker) |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 502 | : mMeta(meta), |
| 503 | mDataSource(source), |
| 504 | mFirstFramePos(first_frame_pos), |
| 505 | mFixedHeader(fixed_header), |
| 506 | mCurrentPos(0), |
| 507 | mCurrentTimeUs(0), |
| 508 | mStarted(false), |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 509 | mSeeker(seeker), |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 510 | mGroup(NULL), |
| 511 | mBasisTimeUs(0), |
| 512 | mSamplesRead(0) { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | MP3Source::~MP3Source() { |
| 516 | if (mStarted) { |
| 517 | stop(); |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | status_t MP3Source::start(MetaData *) { |
Andreas Huber | b5ceb9e | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 522 | CHECK(!mStarted); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 523 | |
| 524 | mGroup = new MediaBufferGroup; |
| 525 | |
| 526 | const size_t kMaxFrameSize = 32768; |
| 527 | mGroup->add_buffer(new MediaBuffer(kMaxFrameSize)); |
| 528 | |
| 529 | mCurrentPos = mFirstFramePos; |
| 530 | mCurrentTimeUs = 0; |
| 531 | |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 532 | mBasisTimeUs = mCurrentTimeUs; |
| 533 | mSamplesRead = 0; |
| 534 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 535 | mStarted = true; |
| 536 | |
| 537 | return OK; |
| 538 | } |
| 539 | |
| 540 | status_t MP3Source::stop() { |
Andreas Huber | b5ceb9e | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 541 | CHECK(mStarted); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 542 | |
| 543 | delete mGroup; |
| 544 | mGroup = NULL; |
| 545 | |
| 546 | mStarted = false; |
| 547 | |
| 548 | return OK; |
| 549 | } |
| 550 | |
| 551 | sp<MetaData> MP3Source::getFormat() { |
| 552 | return mMeta; |
| 553 | } |
| 554 | |
| 555 | status_t MP3Source::read( |
| 556 | MediaBuffer **out, const ReadOptions *options) { |
| 557 | *out = NULL; |
| 558 | |
| 559 | int64_t seekTimeUs; |
Andreas Huber | 6624c9f | 2010-07-20 15:04:28 -0700 | [diff] [blame] | 560 | ReadOptions::SeekMode mode; |
| 561 | if (options != NULL && options->getSeekTo(&seekTimeUs, &mode)) { |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 562 | int64_t actualSeekTimeUs = seekTimeUs; |
| 563 | if (mSeeker == NULL |
| 564 | || !mSeeker->getOffsetForTime(&actualSeekTimeUs, &mCurrentPos)) { |
| 565 | int32_t bitrate; |
| 566 | if (!mMeta->findInt32(kKeyBitRate, &bitrate)) { |
| 567 | // bitrate is in bits/sec. |
| 568 | LOGI("no bitrate"); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 569 | |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 570 | return ERROR_UNSUPPORTED; |
Gloria Wang | 1ba307d | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 571 | } |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 572 | |
| 573 | mCurrentTimeUs = seekTimeUs; |
Gloria Wang | 1ba307d | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 574 | mCurrentPos = mFirstFramePos + seekTimeUs * bitrate / 8000000; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 575 | } else { |
| 576 | mCurrentTimeUs = actualSeekTimeUs; |
Gloria Wang | 1ba307d | 2009-12-09 15:46:19 -0800 | [diff] [blame] | 577 | } |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 578 | |
| 579 | mBasisTimeUs = mCurrentTimeUs; |
| 580 | mSamplesRead = 0; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | MediaBuffer *buffer; |
| 584 | status_t err = mGroup->acquire_buffer(&buffer); |
| 585 | if (err != OK) { |
| 586 | return err; |
| 587 | } |
| 588 | |
| 589 | size_t frame_size; |
Andreas Huber | b64af9a | 2010-06-23 11:11:58 -0700 | [diff] [blame] | 590 | int bitrate; |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 591 | int num_samples; |
| 592 | int sample_rate; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 593 | for (;;) { |
Andreas Huber | 9a12baf | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 594 | ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), 4); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 595 | if (n < 4) { |
| 596 | buffer->release(); |
| 597 | buffer = NULL; |
| 598 | |
| 599 | return ERROR_END_OF_STREAM; |
| 600 | } |
| 601 | |
| 602 | uint32_t header = U32_AT((const uint8_t *)buffer->data()); |
Andreas Huber | b16e554 | 2009-12-07 16:31:31 -0800 | [diff] [blame] | 603 | |
| 604 | if ((header & kMask) == (mFixedHeader & kMask) |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 605 | && MP3Extractor::get_mp3_frame_size( |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 606 | header, &frame_size, &sample_rate, NULL, &bitrate, &num_samples)) { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 607 | break; |
| 608 | } |
| 609 | |
| 610 | // Lost sync. |
Andreas Huber | 1d200e3 | 2010-03-04 16:49:03 -0800 | [diff] [blame] | 611 | LOGV("lost sync! header = 0x%08x, old header = 0x%08x\n", header, mFixedHeader); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 612 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 613 | off64_t pos = mCurrentPos; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 614 | if (!Resync(mDataSource, mFixedHeader, &pos, NULL, NULL)) { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 615 | LOGE("Unable to resync. Signalling end of stream."); |
| 616 | |
| 617 | buffer->release(); |
| 618 | buffer = NULL; |
| 619 | |
| 620 | return ERROR_END_OF_STREAM; |
| 621 | } |
| 622 | |
| 623 | mCurrentPos = pos; |
| 624 | |
| 625 | // Try again with the new position. |
| 626 | } |
| 627 | |
Andreas Huber | b5ceb9e | 2009-08-26 14:48:20 -0700 | [diff] [blame] | 628 | CHECK(frame_size <= buffer->size()); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 629 | |
Andreas Huber | 9a12baf | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 630 | ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), frame_size); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 631 | if (n < (ssize_t)frame_size) { |
| 632 | buffer->release(); |
| 633 | buffer = NULL; |
| 634 | |
| 635 | return ERROR_END_OF_STREAM; |
| 636 | } |
| 637 | |
| 638 | buffer->set_range(0, frame_size); |
| 639 | |
Andreas Huber | fa8de75 | 2009-10-08 10:07:49 -0700 | [diff] [blame] | 640 | buffer->meta_data()->setInt64(kKeyTime, mCurrentTimeUs); |
Andreas Huber | ad98d38 | 2010-08-06 14:13:10 -0700 | [diff] [blame] | 641 | buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 642 | |
| 643 | mCurrentPos += frame_size; |
Jason Simmons | 293e03d | 2011-04-06 18:16:12 -0700 | [diff] [blame] | 644 | |
| 645 | mSamplesRead += num_samples; |
| 646 | mCurrentTimeUs = mBasisTimeUs + ((mSamplesRead * 1000000) / sample_rate); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 647 | |
| 648 | *out = buffer; |
| 649 | |
| 650 | return OK; |
| 651 | } |
| 652 | |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 653 | sp<MetaData> MP3Extractor::getMetaData() { |
| 654 | sp<MetaData> meta = new MetaData; |
| 655 | |
Andreas Huber | 3e0f2be | 2010-09-09 09:48:41 -0700 | [diff] [blame] | 656 | if (mInitCheck != OK) { |
Andreas Huber | 1cb02bf | 2010-01-13 11:25:10 -0800 | [diff] [blame] | 657 | return meta; |
| 658 | } |
| 659 | |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 660 | meta->setCString(kKeyMIMEType, "audio/mpeg"); |
| 661 | |
| 662 | ID3 id3(mDataSource); |
| 663 | |
| 664 | if (!id3.isValid()) { |
| 665 | return meta; |
| 666 | } |
| 667 | |
| 668 | struct Map { |
| 669 | int key; |
| 670 | const char *tag1; |
| 671 | const char *tag2; |
| 672 | }; |
| 673 | static const Map kMap[] = { |
| 674 | { kKeyAlbum, "TALB", "TAL" }, |
| 675 | { kKeyArtist, "TPE1", "TP1" }, |
Marco Nelissen | c5d5ee3 | 2010-02-11 13:31:44 -0800 | [diff] [blame] | 676 | { kKeyAlbumArtist, "TPE2", "TP2" }, |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 677 | { kKeyComposer, "TCOM", "TCM" }, |
| 678 | { kKeyGenre, "TCON", "TCO" }, |
Andreas Huber | 3a3656c | 2010-01-13 10:45:49 -0800 | [diff] [blame] | 679 | { kKeyTitle, "TIT2", "TT2" }, |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 680 | { kKeyYear, "TYE", "TYER" }, |
Andreas Huber | 3a3656c | 2010-01-13 10:45:49 -0800 | [diff] [blame] | 681 | { kKeyAuthor, "TXT", "TEXT" }, |
| 682 | { kKeyCDTrackNumber, "TRK", "TRCK" }, |
Marco Nelissen | 655306f | 2010-02-08 14:50:19 -0800 | [diff] [blame] | 683 | { kKeyDiscNumber, "TPA", "TPOS" }, |
Marco Nelissen | ee35aff | 2011-01-06 11:12:17 -0800 | [diff] [blame] | 684 | { kKeyCompilation, "TCP", "TCMP" }, |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 685 | }; |
| 686 | static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]); |
| 687 | |
| 688 | for (size_t i = 0; i < kNumMapEntries; ++i) { |
| 689 | ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1); |
| 690 | if (it->done()) { |
| 691 | delete it; |
| 692 | it = new ID3::Iterator(id3, kMap[i].tag2); |
| 693 | } |
| 694 | |
| 695 | if (it->done()) { |
| 696 | delete it; |
| 697 | continue; |
| 698 | } |
| 699 | |
| 700 | String8 s; |
| 701 | it->getString(&s); |
| 702 | delete it; |
| 703 | |
| 704 | meta->setCString(kMap[i].key, s); |
| 705 | } |
| 706 | |
| 707 | size_t dataSize; |
| 708 | String8 mime; |
| 709 | const void *data = id3.getAlbumArt(&dataSize, &mime); |
| 710 | |
| 711 | if (data) { |
| 712 | meta->setData(kKeyAlbumArt, MetaData::TYPE_NONE, data, dataSize); |
| 713 | meta->setCString(kKeyAlbumArtMIME, mime.string()); |
| 714 | } |
| 715 | |
| 716 | return meta; |
| 717 | } |
| 718 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 719 | bool SniffMP3( |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 720 | const sp<DataSource> &source, String8 *mimeType, |
| 721 | float *confidence, sp<AMessage> *meta) { |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 722 | off64_t pos = 0; |
| 723 | off64_t post_id3_pos; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 724 | uint32_t header; |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 725 | if (!Resync(source, 0, &pos, &post_id3_pos, &header)) { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 726 | return false; |
| 727 | } |
| 728 | |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 729 | *meta = new AMessage; |
| 730 | (*meta)->setInt64("offset", pos); |
| 731 | (*meta)->setInt32("header", header); |
Andreas Huber | 1bd99498 | 2010-11-09 08:57:45 -0800 | [diff] [blame] | 732 | (*meta)->setInt64("post-id3-offset", post_id3_pos); |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 733 | |
Andreas Huber | e6c4096 | 2009-09-10 14:13:30 -0700 | [diff] [blame] | 734 | *mimeType = MEDIA_MIMETYPE_AUDIO_MPEG; |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 735 | *confidence = 0.2f; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 736 | |
| 737 | return true; |
| 738 | } |
| 739 | |
| 740 | } // namespace android |