MP3Extractor.cpp revision 386d609dc513e838c7e7c4c46c604493ccd560be
120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber/* 220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Copyright (C) 2009 The Android Open Source Project 320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * you may not use this file except in compliance with the License. 620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * You may obtain a copy of the License at 720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 1020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Unless required by applicable law or agreed to in writing, software 1120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 1220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * See the License for the specific language governing permissions and 1420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * limitations under the License. 1520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber */ 1620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber//#define LOG_NDEBUG 0 1820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#define LOG_TAG "MP3Extractor" 1920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <utils/Log.h> 2020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 2166326a5ee0869f1ee4d136a477e6effba428b3cbAndreas Huber#include "include/MP3Extractor.h" 2266326a5ee0869f1ee4d136a477e6effba428b3cbAndreas Huber 23386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber#include "include/avc_utils.h" 24fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber#include "include/ID3.h" 254456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber#include "include/VBRISeeker.h" 264456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber#include "include/XINGSeeker.h" 27fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 285a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber#include <media/stagefright/foundation/AMessage.h> 2920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/DataSource.h> 3020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaBuffer.h> 3120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaBufferGroup.h> 320c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber#include <media/stagefright/MediaDebug.h> 3318291bc20e55e8f3fd5feb786771a8ed32c19c59Andreas Huber#include <media/stagefright/MediaDefs.h> 3420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaErrors.h> 3520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaSource.h> 3620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MetaData.h> 3720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/Utils.h> 3820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <utils/String8.h> 3920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4020111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubernamespace android { 4120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 42541962997b4076da11546619f082467ffd9bcd1fAndreas Huber// Everything must match except for 432eb6a47b58c5b36f887a372e89f3d70f5d40812cJames Dong// protection, bitrate, padding, private bits, mode, mode extension, 44ba1f481614b4a4dd290e3b75e0f3f1879a383a44Andreas Huber// copyright bit, original bit and emphasis. 45ba1f481614b4a4dd290e3b75e0f3f1879a383a44Andreas Huber// Yes ... there are things that must indeed match... 462eb6a47b58c5b36f887a372e89f3d70f5d40812cJames Dongstatic const uint32_t kMask = 0xfffe0c00; 47541962997b4076da11546619f082467ffd9bcd1fAndreas Huber 4820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatic bool Resync( 49693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber const sp<DataSource> &source, uint32_t match_header, 50c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t *inout_pos, off64_t *post_id3_pos, uint32_t *out_header) { 514456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (post_id3_pos != NULL) { 524456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber *post_id3_pos = 0; 534456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } 544456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 550bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber if (*inout_pos == 0) { 560bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber // Skip an optional ID3 header if syncing at the very beginning 570bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber // of the datasource. 580bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber 59ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber for (;;) { 60ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber uint8_t id3header[10]; 61ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber if (source->readAt(*inout_pos, id3header, sizeof(id3header)) 62ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber < (ssize_t)sizeof(id3header)) { 63ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber // If we can't even read these 10 bytes, we might as well bail 64ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber // out, even if there _were_ 10 bytes of valid mp3 audio data... 65ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber return false; 66ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber } 67ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber 68ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber if (memcmp("ID3", id3header, 3)) { 69ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber break; 70ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber } 710bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber 720bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber // Skip the ID3v2 header. 730bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber 740bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber size_t len = 750bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber ((id3header[6] & 0x7f) << 21) 760bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber | ((id3header[7] & 0x7f) << 14) 770bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber | ((id3header[8] & 0x7f) << 7) 780bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber | (id3header[9] & 0x7f); 790bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber 800bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber len += 10; 810bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber 820bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber *inout_pos += len; 83ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber 84e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong LOGV("skipped ID3 tag, new starting offset is %lld (0x%016llx)", 85ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber *inout_pos, *inout_pos); 860bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber } 874456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 884456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (post_id3_pos != NULL) { 894456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber *post_id3_pos = *inout_pos; 904456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } 910bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber } 920bf3921522461b1c7d321d0c667c1020ab3110bcAndreas Huber 93c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = *inout_pos; 9420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber bool valid = false; 957cc497733b7602b99b783decfa8c002bc27e25aaJames Dong 967cc497733b7602b99b783decfa8c002bc27e25aaJames Dong const size_t kMaxReadBytes = 1024; 977cc497733b7602b99b783decfa8c002bc27e25aaJames Dong const size_t kMaxBytesChecked = 128 * 1024; 987cc497733b7602b99b783decfa8c002bc27e25aaJames Dong uint8_t buf[kMaxReadBytes]; 997cc497733b7602b99b783decfa8c002bc27e25aaJames Dong ssize_t bytesToRead = kMaxReadBytes; 1007cc497733b7602b99b783decfa8c002bc27e25aaJames Dong ssize_t totalBytesRead = 0; 1017cc497733b7602b99b783decfa8c002bc27e25aaJames Dong ssize_t remainingBytes = 0; 1027cc497733b7602b99b783decfa8c002bc27e25aaJames Dong bool reachEOS = false; 1037cc497733b7602b99b783decfa8c002bc27e25aaJames Dong uint8_t *tmp = buf; 1047cc497733b7602b99b783decfa8c002bc27e25aaJames Dong 10520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber do { 1067cc497733b7602b99b783decfa8c002bc27e25aaJames Dong if (pos >= *inout_pos + kMaxBytesChecked) { 107ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber // Don't scan forever. 108e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong LOGV("giving up at offset %lld", pos); 109ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber break; 110ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber } 11120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1127cc497733b7602b99b783decfa8c002bc27e25aaJames Dong if (remainingBytes < 4) { 1137cc497733b7602b99b783decfa8c002bc27e25aaJames Dong if (reachEOS) { 1147cc497733b7602b99b783decfa8c002bc27e25aaJames Dong break; 1157cc497733b7602b99b783decfa8c002bc27e25aaJames Dong } else { 1167cc497733b7602b99b783decfa8c002bc27e25aaJames Dong memcpy(buf, tmp, remainingBytes); 1177cc497733b7602b99b783decfa8c002bc27e25aaJames Dong bytesToRead = kMaxReadBytes - remainingBytes; 118e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong 119e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong /* 120e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong * The next read position should start from the end of 121e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong * the last buffer, and thus should include the remaining 122e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong * bytes in the buffer. 123e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong */ 124e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong totalBytesRead = source->readAt(pos + remainingBytes, 125e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong buf + remainingBytes, 126e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong bytesToRead); 1277cc497733b7602b99b783decfa8c002bc27e25aaJames Dong if (totalBytesRead <= 0) { 1287cc497733b7602b99b783decfa8c002bc27e25aaJames Dong break; 1297cc497733b7602b99b783decfa8c002bc27e25aaJames Dong } 1307cc497733b7602b99b783decfa8c002bc27e25aaJames Dong reachEOS = (totalBytesRead != bytesToRead); 1317cc497733b7602b99b783decfa8c002bc27e25aaJames Dong totalBytesRead += remainingBytes; 1327cc497733b7602b99b783decfa8c002bc27e25aaJames Dong remainingBytes = totalBytesRead; 1337cc497733b7602b99b783decfa8c002bc27e25aaJames Dong tmp = buf; 1347cc497733b7602b99b783decfa8c002bc27e25aaJames Dong continue; 1357cc497733b7602b99b783decfa8c002bc27e25aaJames Dong } 13620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 13720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 138ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber uint32_t header = U32_AT(tmp); 13920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 14020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (match_header != 0 && (header & kMask) != (match_header & kMask)) { 141ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber ++pos; 1427cc497733b7602b99b783decfa8c002bc27e25aaJames Dong ++tmp; 1437cc497733b7602b99b783decfa8c002bc27e25aaJames Dong --remainingBytes; 14420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber continue; 14520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 14620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 14720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber size_t frame_size; 14820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber int sample_rate, num_channels, bitrate; 149386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber if (!GetMPEGAudioFrameSize( 1504456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber header, &frame_size, 1514456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber &sample_rate, &num_channels, &bitrate)) { 152ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber ++pos; 1537cc497733b7602b99b783decfa8c002bc27e25aaJames Dong ++tmp; 1547cc497733b7602b99b783decfa8c002bc27e25aaJames Dong --remainingBytes; 155c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber continue; 156c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber } 15720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 158e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong LOGV("found possible 1st frame at %lld (header = 0x%08x)", pos, header); 15920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 160c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber // We found what looks like a valid frame, 161c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber // now find its successors. 16220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 163c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t test_pos = pos + frame_size; 16420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 165c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber valid = true; 166c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber for (int j = 0; j < 3; ++j) { 167c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber uint8_t tmp[4]; 16834769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber if (source->readAt(test_pos, tmp, 4) < 4) { 169c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber valid = false; 170c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber break; 171c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber } 172541962997b4076da11546619f082467ffd9bcd1fAndreas Huber 173c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber uint32_t test_header = U32_AT(tmp); 17420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 175c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber LOGV("subsequent header is %08x", test_header); 17620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 177c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber if ((test_header & kMask) != (header & kMask)) { 178c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber valid = false; 179c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber break; 180c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber } 18120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 182c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber size_t test_frame_size; 183386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber if (!GetMPEGAudioFrameSize( 1844456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber test_header, &test_frame_size)) { 185c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber valid = false; 186c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber break; 18720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 188c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber 189e23da615c0b1721fe7d9d2e06e82e43b9bd89df3James Dong LOGV("found subsequent frame #%d at %lld", j + 2, test_pos); 190c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber 191c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber test_pos += test_frame_size; 19220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 19320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 19420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (valid) { 195ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber *inout_pos = pos; 19620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 19720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (out_header != NULL) { 19820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *out_header = header; 19920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 20020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } else { 20120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber LOGV("no dice, no valid sequence of frames found."); 20220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 20320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 204ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber ++pos; 2057cc497733b7602b99b783decfa8c002bc27e25aaJames Dong ++tmp; 2067cc497733b7602b99b783decfa8c002bc27e25aaJames Dong --remainingBytes; 20720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } while (!valid); 20820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 20920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return valid; 21020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 21120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 21220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberclass MP3Source : public MediaSource { 21320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberpublic: 21420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MP3Source( 215693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber const sp<MetaData> &meta, const sp<DataSource> &source, 216c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t first_frame_pos, uint32_t fixed_header, 2174456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber const sp<MP3Seeker> &seeker); 21820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 21920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber virtual status_t start(MetaData *params = NULL); 22020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber virtual status_t stop(); 22120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 22220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber virtual sp<MetaData> getFormat(); 22320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 22420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber virtual status_t read( 22520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBuffer **buffer, const ReadOptions *options = NULL); 22620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 227693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huberprotected: 228693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber virtual ~MP3Source(); 229693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 23020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberprivate: 23120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber sp<MetaData> mMeta; 232693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber sp<DataSource> mDataSource; 233c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t mFirstFramePos; 23420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t mFixedHeader; 235c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t mCurrentPos; 23620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber int64_t mCurrentTimeUs; 23720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber bool mStarted; 2384456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber sp<MP3Seeker> mSeeker; 23920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBufferGroup *mGroup; 24020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 241a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int64_t mBasisTimeUs; 242a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int64_t mSamplesRead; 243a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 24420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MP3Source(const MP3Source &); 24520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MP3Source &operator=(const MP3Source &); 24620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber}; 24720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 2485a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas HuberMP3Extractor::MP3Extractor( 2495a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber const sp<DataSource> &source, const sp<AMessage> &meta) 250772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber : mInitCheck(NO_INIT), 251772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mDataSource(source), 25220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mFirstFramePos(-1), 2534456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mFixedHeader(0) { 254c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = 0; 255c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t post_id3_pos; 25620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t header; 2575a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber bool success; 2585a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber 2595a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber int64_t meta_offset; 2605a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber uint32_t meta_header; 2614456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int64_t meta_post_id3_offset; 2625a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber if (meta != NULL 2635a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber && meta->findInt64("offset", &meta_offset) 2644456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber && meta->findInt32("header", (int32_t *)&meta_header) 2654456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber && meta->findInt64("post-id3-offset", &meta_post_id3_offset)) { 2665a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // The sniffer has already done all the hard work for us, simply 2675a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // accept its judgement. 268c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong pos = (off64_t)meta_offset; 2695a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber header = meta_header; 270c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong post_id3_pos = (off64_t)meta_post_id3_offset; 2715a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber 2725a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber success = true; 2735a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber } else { 2744456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber success = Resync(mDataSource, 0, &pos, &post_id3_pos, &header); 2755a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber } 27620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 277772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (!success) { 278772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber // mInitCheck will remain NO_INIT 279772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber return; 280772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber } 28120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 282772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mFirstFramePos = pos; 283772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mFixedHeader = header; 28420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 285772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber size_t frame_size; 286772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber int sample_rate; 287772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber int num_channels; 288772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber int bitrate; 289386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber GetMPEGAudioFrameSize( 290772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber header, &frame_size, &sample_rate, &num_channels, &bitrate); 291772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber 292772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta = new MetaData; 293772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber 294772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG); 295772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setInt32(kKeySampleRate, sample_rate); 296772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setInt32(kKeyBitRate, bitrate * 1000); 297772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setInt32(kKeyChannelCount, num_channels); 298772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber 2994456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mSeeker = XINGSeeker::CreateFromSource(mDataSource, mFirstFramePos); 3004456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 3014456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (mSeeker == NULL) { 3024456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mSeeker = VBRISeeker::CreateFromSource(mDataSource, post_id3_pos); 3034456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } 3044456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 3054456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int64_t durationUs; 3064456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 3074456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (mSeeker == NULL || !mSeeker->getDuration(&durationUs)) { 308c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t fileSize; 309772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mDataSource->getSize(&fileSize) == OK) { 3104456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber durationUs = 8000LL * (fileSize - mFirstFramePos) / bitrate; 3114456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } else { 3124456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber durationUs = -1; 31320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 31420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 31520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 3164456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (durationUs >= 0) { 3174456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mMeta->setInt64(kKeyDuration, durationUs); 3184456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } 3194456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 320772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mInitCheck = OK; 32120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 32220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 323693d271e62a3726689ff68f4505ba49228eb94b2Andreas Hubersize_t MP3Extractor::countTracks() { 324772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber return mInitCheck != OK ? 0 : 1; 32520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 32620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 327693d271e62a3726689ff68f4505ba49228eb94b2Andreas Hubersp<MediaSource> MP3Extractor::getTrack(size_t index) { 328772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mInitCheck != OK || index != 0) { 329693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber return NULL; 33020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 33120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 332693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber return new MP3Source( 333ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang mMeta, mDataSource, mFirstFramePos, mFixedHeader, 3344456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mSeeker); 33520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 33620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 3377e04dcf8d6784dd56f53aa90bf34431ab4f0710cAndreas Hubersp<MetaData> MP3Extractor::getTrackMetaData(size_t index, uint32_t flags) { 338772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mInitCheck != OK || index != 0) { 33920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return NULL; 34020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 34120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 34220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return mMeta; 34320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 34420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 34520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber//////////////////////////////////////////////////////////////////////////////// 34620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 34720111aa043c5f404472bc63b90bc5aad906b1101Andreas HuberMP3Source::MP3Source( 348693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber const sp<MetaData> &meta, const sp<DataSource> &source, 349c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t first_frame_pos, uint32_t fixed_header, 3504456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber const sp<MP3Seeker> &seeker) 35120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber : mMeta(meta), 35220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mDataSource(source), 35320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mFirstFramePos(first_frame_pos), 35420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mFixedHeader(fixed_header), 35520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos(0), 35620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentTimeUs(0), 35720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mStarted(false), 3584456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mSeeker(seeker), 359a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mGroup(NULL), 360a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mBasisTimeUs(0), 361a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead(0) { 36220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 36320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 36420111aa043c5f404472bc63b90bc5aad906b1101Andreas HuberMP3Source::~MP3Source() { 36520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (mStarted) { 36620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber stop(); 36720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 36820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 36920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 37020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t MP3Source::start(MetaData *) { 3710c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber CHECK(!mStarted); 37220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 37320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mGroup = new MediaBufferGroup; 37420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 37520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber const size_t kMaxFrameSize = 32768; 37620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mGroup->add_buffer(new MediaBuffer(kMaxFrameSize)); 37720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 37820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos = mFirstFramePos; 37920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentTimeUs = 0; 38020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 381a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mBasisTimeUs = mCurrentTimeUs; 382a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead = 0; 383a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 38420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mStarted = true; 38520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 38620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return OK; 38720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 38820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 38920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t MP3Source::stop() { 3900c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber CHECK(mStarted); 39120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 39220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber delete mGroup; 39320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mGroup = NULL; 39420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 39520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mStarted = false; 39620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 39720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return OK; 39820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 39920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 40020111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubersp<MetaData> MP3Source::getFormat() { 40120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return mMeta; 40220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 40320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 40420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t MP3Source::read( 40520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBuffer **out, const ReadOptions *options) { 40620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *out = NULL; 40720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 40820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber int64_t seekTimeUs; 409abd1f4f870925d6776dbe4b930b759a1ab6595caAndreas Huber ReadOptions::SeekMode mode; 410abd1f4f870925d6776dbe4b930b759a1ab6595caAndreas Huber if (options != NULL && options->getSeekTo(&seekTimeUs, &mode)) { 4114456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int64_t actualSeekTimeUs = seekTimeUs; 4124456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (mSeeker == NULL 4134456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber || !mSeeker->getOffsetForTime(&actualSeekTimeUs, &mCurrentPos)) { 4144456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int32_t bitrate; 4154456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (!mMeta->findInt32(kKeyBitRate, &bitrate)) { 4164456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber // bitrate is in bits/sec. 4174456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber LOGI("no bitrate"); 4184456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 4194456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber return ERROR_UNSUPPORTED; 420ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang } 4214456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 4224456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mCurrentTimeUs = seekTimeUs; 423ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang mCurrentPos = mFirstFramePos + seekTimeUs * bitrate / 8000000; 4244456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } else { 4254456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mCurrentTimeUs = actualSeekTimeUs; 426ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang } 427a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 428a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mBasisTimeUs = mCurrentTimeUs; 429a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead = 0; 43020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 43120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 43220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBuffer *buffer; 43320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber status_t err = mGroup->acquire_buffer(&buffer); 43420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (err != OK) { 43520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return err; 43620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 43720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 43820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber size_t frame_size; 4393e0339f9ec42c2c31deb632254e9cc8a06d3db91Andreas Huber int bitrate; 440a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int num_samples; 441a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int sample_rate; 44220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber for (;;) { 44334769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), 4); 44420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (n < 4) { 44520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->release(); 44620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer = NULL; 44720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 44820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return ERROR_END_OF_STREAM; 44920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 45020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 45120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t header = U32_AT((const uint8_t *)buffer->data()); 452541962997b4076da11546619f082467ffd9bcd1fAndreas Huber 453541962997b4076da11546619f082467ffd9bcd1fAndreas Huber if ((header & kMask) == (mFixedHeader & kMask) 454386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber && GetMPEGAudioFrameSize( 455386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber header, &frame_size, &sample_rate, NULL, 456386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber &bitrate, &num_samples)) { 45720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber break; 45820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 45920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 46020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber // Lost sync. 461ba1f481614b4a4dd290e3b75e0f3f1879a383a44Andreas Huber LOGV("lost sync! header = 0x%08x, old header = 0x%08x\n", header, mFixedHeader); 46220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 463c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = mCurrentPos; 4644456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (!Resync(mDataSource, mFixedHeader, &pos, NULL, NULL)) { 46520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber LOGE("Unable to resync. Signalling end of stream."); 46620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 46720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->release(); 46820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer = NULL; 46920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 47020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return ERROR_END_OF_STREAM; 47120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 47220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 47320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos = pos; 47420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 47520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber // Try again with the new position. 47620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 47720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4780c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber CHECK(frame_size <= buffer->size()); 47920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 48034769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), frame_size); 48120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (n < (ssize_t)frame_size) { 48220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->release(); 48320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer = NULL; 48420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 48520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return ERROR_END_OF_STREAM; 48620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 48720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 48820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->set_range(0, frame_size); 48920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 49048c948b1137e7bbdb161b51908657ab72ac5e2daAndreas Huber buffer->meta_data()->setInt64(kKeyTime, mCurrentTimeUs); 4918bf59e735760af0b6a85747fd90bf8cf1e5388d7Andreas Huber buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); 49220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 49320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos += frame_size; 494a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 495a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead += num_samples; 496a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mCurrentTimeUs = mBasisTimeUs + ((mSamplesRead * 1000000) / sample_rate); 49720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 49820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *out = buffer; 49920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 50020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return OK; 50120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 50220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 503fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubersp<MetaData> MP3Extractor::getMetaData() { 504fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber sp<MetaData> meta = new MetaData; 505fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 506772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mInitCheck != OK) { 5077be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber return meta; 5087be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber } 5097be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber 510fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setCString(kKeyMIMEType, "audio/mpeg"); 511fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 512fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber ID3 id3(mDataSource); 513fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 514fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!id3.isValid()) { 515fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return meta; 516fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 517fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 518fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber struct Map { 519fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber int key; 520fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const char *tag1; 521fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const char *tag2; 522fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber }; 523fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber static const Map kMap[] = { 524fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyAlbum, "TALB", "TAL" }, 525fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyArtist, "TPE1", "TP1" }, 52666ac4df65516ebfd0e500bfca75dc4b5ef8d674eMarco Nelissen { kKeyAlbumArtist, "TPE2", "TP2" }, 527fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyComposer, "TCOM", "TCM" }, 528fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyGenre, "TCON", "TCO" }, 529bd4bc59262df90dc85752684a1d4a92833a535a3Andreas Huber { kKeyTitle, "TIT2", "TT2" }, 530fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyYear, "TYE", "TYER" }, 531bd4bc59262df90dc85752684a1d4a92833a535a3Andreas Huber { kKeyAuthor, "TXT", "TEXT" }, 532bd4bc59262df90dc85752684a1d4a92833a535a3Andreas Huber { kKeyCDTrackNumber, "TRK", "TRCK" }, 5336c8a9a4132337a3419a72a735f0b40df0b82061fMarco Nelissen { kKeyDiscNumber, "TPA", "TPOS" }, 53411f8109ad8646d3acd9a0987613229cde59d52c1Marco Nelissen { kKeyCompilation, "TCP", "TCMP" }, 535fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber }; 536fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]); 537fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 538fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (size_t i = 0; i < kNumMapEntries; ++i) { 539fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1); 540fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (it->done()) { 541fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete it; 542fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it = new ID3::Iterator(id3, kMap[i].tag2); 543fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 544fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 545fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (it->done()) { 546fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete it; 547fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber continue; 548fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 549fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 550fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber String8 s; 551fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it->getString(&s); 552fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete it; 553fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 554fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setCString(kMap[i].key, s); 555fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 556fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 557fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t dataSize; 558fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber String8 mime; 559fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const void *data = id3.getAlbumArt(&dataSize, &mime); 560fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 561fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (data) { 562fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setData(kKeyAlbumArt, MetaData::TYPE_NONE, data, dataSize); 563fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setCString(kKeyAlbumArtMIME, mime.string()); 564fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 565fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 566fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return meta; 567fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 568fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 569693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huberbool SniffMP3( 5705a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber const sp<DataSource> &source, String8 *mimeType, 5715a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber float *confidence, sp<AMessage> *meta) { 572c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = 0; 573c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t post_id3_pos; 57420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t header; 5754456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (!Resync(source, 0, &pos, &post_id3_pos, &header)) { 57620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return false; 57720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 57820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 5795a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber *meta = new AMessage; 5805a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber (*meta)->setInt64("offset", pos); 5815a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber (*meta)->setInt32("header", header); 5824456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber (*meta)->setInt64("post-id3-offset", post_id3_pos); 5835a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber 58418291bc20e55e8f3fd5feb786771a8ed32c19c59Andreas Huber *mimeType = MEDIA_MIMETYPE_AUDIO_MPEG; 5855a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber *confidence = 0.2f; 58620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 58720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return true; 58820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 58920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 59020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} // namespace android 591