MP3Extractor.cpp revision 607612858f3afad1ade51a098aafa2a41523b5f7
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 2175226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen#include "MP3Extractor.h" 2266326a5ee0869f1ee4d136a477e6effba428b3cbAndreas Huber 2375226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen#include "avc_utils.h" 2475226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen#include "ID3.h" 2575226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen#include "VBRISeeker.h" 2675226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen#include "XINGSeeker.h" 27fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 282944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber#include <media/stagefright/foundation/ADebug.h> 295a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber#include <media/stagefright/foundation/AMessage.h> 30607612858f3afad1ade51a098aafa2a41523b5f7Dongwon Kang#include <media/stagefright/foundation/ByteUtils.h> 3120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/DataSource.h> 3220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaBuffer.h> 3320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaBufferGroup.h> 3418291bc20e55e8f3fd5feb786771a8ed32c19c59Andreas Huber#include <media/stagefright/MediaDefs.h> 3520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaErrors.h> 3620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaSource.h> 3720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MetaData.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 843856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("skipped ID3 tag, new starting offset is %lld (0x%016llx)", 85ee4e1b1a63758941460ae79a064249d3a5189443Lajos Molnar (long long)*inout_pos, (long long)*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 { 106ee4e1b1a63758941460ae79a064249d3a5189443Lajos Molnar if (pos >= (off64_t)(*inout_pos + kMaxBytesChecked)) { 107ba0707dc52b3ad2bec2244e1e6c39f31e06d467aAndreas Huber // Don't scan forever. 108ee4e1b1a63758941460ae79a064249d3a5189443Lajos Molnar ALOGV("giving up at offset %lld", (long long)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 140d6e27296206b9f897401107f1c46f4ac2947be85James Dong if (match_header != 0 && (header & kMask) != (match_header & kMask)) { 141d6e27296206b9f897401107f1c46f4ac2947be85James Dong ++pos; 142d6e27296206b9f897401107f1c46f4ac2947be85James Dong ++tmp; 143d6e27296206b9f897401107f1c46f4ac2947be85James Dong --remainingBytes; 144d6e27296206b9f897401107f1c46f4ac2947be85James Dong continue; 145d6e27296206b9f897401107f1c46f4ac2947be85James Dong } 146d6e27296206b9f897401107f1c46f4ac2947be85James Dong 14720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber size_t frame_size; 148d6e27296206b9f897401107f1c46f4ac2947be85James Dong int sample_rate, num_channels, bitrate; 149d6e27296206b9f897401107f1c46f4ac2947be85James Dong if (!GetMPEGAudioFrameSize( 150d6e27296206b9f897401107f1c46f4ac2947be85James Dong header, &frame_size, 151d6e27296206b9f897401107f1c46f4ac2947be85James Dong &sample_rate, &num_channels, &bitrate)) { 152d6e27296206b9f897401107f1c46f4ac2947be85James Dong ++pos; 153d6e27296206b9f897401107f1c46f4ac2947be85James Dong ++tmp; 154d6e27296206b9f897401107f1c46f4ac2947be85James Dong --remainingBytes; 155d6e27296206b9f897401107f1c46f4ac2947be85James Dong continue; 156c8d6c8bdd84464e0c7e511241ede2299cf38fda4Andreas Huber } 15720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 158ee4e1b1a63758941460ae79a064249d3a5189443Lajos Molnar ALOGV("found possible 1st frame at %lld (header = 0x%08x)", (long long)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 1753856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("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 189ee4e1b1a63758941460ae79a064249d3a5189443Lajos Molnar ALOGV("found subsequent frame #%d at %lld", j + 2, (long long)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 { 2013856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("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: 231a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman static const size_t kMaxFrameSize; 23220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber sp<MetaData> mMeta; 233693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber sp<DataSource> mDataSource; 234c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t mFirstFramePos; 23520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t mFixedHeader; 236c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t mCurrentPos; 23720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber int64_t mCurrentTimeUs; 23820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber bool mStarted; 2394456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber sp<MP3Seeker> mSeeker; 24020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBufferGroup *mGroup; 24120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 242a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int64_t mBasisTimeUs; 243a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int64_t mSamplesRead; 244a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 24520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MP3Source(const MP3Source &); 24620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MP3Source &operator=(const MP3Source &); 24720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber}; 24820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 2495a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas HuberMP3Extractor::MP3Extractor( 2505a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber const sp<DataSource> &source, const sp<AMessage> &meta) 251772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber : mInitCheck(NO_INIT), 252772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mDataSource(source), 25320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mFirstFramePos(-1), 2544456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mFixedHeader(0) { 25563690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen 256c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = 0; 257c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t post_id3_pos; 25820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t header; 2595a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber bool success; 2605a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber 2615a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber int64_t meta_offset; 2625a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber uint32_t meta_header; 2634456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int64_t meta_post_id3_offset; 2645a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber if (meta != NULL 2655a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber && meta->findInt64("offset", &meta_offset) 2664456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber && meta->findInt32("header", (int32_t *)&meta_header) 2674456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber && meta->findInt64("post-id3-offset", &meta_post_id3_offset)) { 2685a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // The sniffer has already done all the hard work for us, simply 2695a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // accept its judgement. 270c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong pos = (off64_t)meta_offset; 2715a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber header = meta_header; 272c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong post_id3_pos = (off64_t)meta_post_id3_offset; 2735a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber 2745a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber success = true; 2755a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber } else { 2764456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber success = Resync(mDataSource, 0, &pos, &post_id3_pos, &header); 2775a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber } 27820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 279772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (!success) { 280772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber // mInitCheck will remain NO_INIT 281772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber return; 282772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber } 28320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 284772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mFirstFramePos = pos; 285772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mFixedHeader = header; 2864f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mMeta = new MetaData; 2874f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen sp<XINGSeeker> seeker = XINGSeeker::CreateFromSource(mDataSource, mFirstFramePos); 2884f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen 2894f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen if (seeker == NULL) { 2904f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mSeeker = VBRISeeker::CreateFromSource(mDataSource, post_id3_pos); 2914f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen } else { 2924f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mSeeker = seeker; 2934f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen int encd = seeker->getEncoderDelay(); 2944f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen int encp = seeker->getEncoderPadding(); 2954f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen if (encd != 0 || encp != 0) { 2964f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mMeta->setInt32(kKeyEncoderDelay, encd); 2974f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mMeta->setInt32(kKeyEncoderPadding, encp); 2984f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen } 2994f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen } 3004f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen 3014f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen if (mSeeker != NULL) { 3024f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen // While it is safe to send the XING/VBRI frame to the decoder, this will 3034f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen // result in an extra 1152 samples being output. In addition, the bitrate 3044f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen // of the Xing header might not match the rest of the file, which could 3054f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen // lead to problems when seeking. The real first frame to decode is after 3064f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen // the XING/VBRI frame, so skip there. 3074f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen size_t frame_size; 3084f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen int sample_rate; 3094f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen int num_channels; 3104f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen int bitrate; 3114f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen GetMPEGAudioFrameSize( 3124f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen header, &frame_size, &sample_rate, &num_channels, &bitrate); 3134f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen pos += frame_size; 3144f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen if (!Resync(mDataSource, 0, &pos, &post_id3_pos, &header)) { 3154f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen // mInitCheck will remain NO_INIT 3164f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen return; 3174f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen } 3184f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mFirstFramePos = pos; 3194f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen mFixedHeader = header; 3204f13fde7fe1d88aa259d566d8837d97b07703205Marco Nelissen } 32120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 322772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber size_t frame_size; 323772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber int sample_rate; 324772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber int num_channels; 325772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber int bitrate; 326386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber GetMPEGAudioFrameSize( 327772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber header, &frame_size, &sample_rate, &num_channels, &bitrate); 328772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber 3292944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber unsigned layer = 4 - ((header >> 17) & 3); 3302944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber 3312944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber switch (layer) { 3322944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber case 1: 3332944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_I); 3342944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber break; 3352944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber case 2: 3362944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_II); 3372944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber break; 3382944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber case 3: 3392944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG); 3402944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber break; 3412944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber default: 3422944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber TRESPASS(); 3432944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber } 3442944eca607304a095ea43ba2b8f0b9de61249f9fAndreas Huber 345772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setInt32(kKeySampleRate, sample_rate); 346772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setInt32(kKeyBitRate, bitrate * 1000); 347772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mMeta->setInt32(kKeyChannelCount, num_channels); 348772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber 3494456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int64_t durationUs; 3504456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 3514456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (mSeeker == NULL || !mSeeker->getDuration(&durationUs)) { 352c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t fileSize; 353772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mDataSource->getSize(&fileSize) == OK) { 35463690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen off64_t dataLength = fileSize - mFirstFramePos; 35563690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen if (dataLength > INT64_MAX / 8000LL) { 35663690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen // duration would overflow 35763690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen durationUs = INT64_MAX; 35863690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen } else { 35963690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen durationUs = 8000LL * dataLength / bitrate; 36063690d1588cb24929da7ced24ec341ed2a003825Marco Nelissen } 3614456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } else { 3624456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber durationUs = -1; 36320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 36420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 36520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 3664456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (durationUs >= 0) { 3674456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mMeta->setInt64(kKeyDuration, durationUs); 3684456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } 3694456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 370772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber mInitCheck = OK; 371092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen 372ffd6ffc5429c45577fd8e9f8fa90e79bb91b8a84Dylan Powers // Get iTunes-style gapless info if present. 373ffd6ffc5429c45577fd8e9f8fa90e79bb91b8a84Dylan Powers // When getting the id3 tag, skip the V1 tags to prevent the source cache 374ffd6ffc5429c45577fd8e9f8fa90e79bb91b8a84Dylan Powers // from being iterated to the end of the file. 375ffd6ffc5429c45577fd8e9f8fa90e79bb91b8a84Dylan Powers ID3 id3(mDataSource, true); 376092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen if (id3.isValid()) { 377092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen ID3::Iterator *com = new ID3::Iterator(id3, "COM"); 378092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen if (com->done()) { 379092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen delete com; 380092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen com = new ID3::Iterator(id3, "COMM"); 381092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen } 382092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen while(!com->done()) { 383092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen String8 commentdesc; 384092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen String8 commentvalue; 385092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen com->getString(&commentdesc, &commentvalue); 386092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen const char * desc = commentdesc.string(); 387092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen const char * value = commentvalue.string(); 388092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen 389092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen // first 3 characters are the language, which we don't care about 390092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen if(strlen(desc) > 3 && strcmp(desc + 3, "iTunSMPB") == 0) { 391092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen 392092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen int32_t delay, padding; 393092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen if (sscanf(value, " %*x %x %x %*x", &delay, &padding) == 2) { 394092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen mMeta->setInt32(kKeyEncoderDelay, delay); 395092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen mMeta->setInt32(kKeyEncoderPadding, padding); 396092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen } 397092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen break; 398092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen } 399092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen com->next(); 400092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen } 401092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen delete com; 402092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen com = NULL; 403092406a2568316bbe5ed1ec6335e6f1d128ebf8eMarco Nelissen } 40420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 40520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 406693d271e62a3726689ff68f4505ba49228eb94b2Andreas Hubersize_t MP3Extractor::countTracks() { 407772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber return mInitCheck != OK ? 0 : 1; 40820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 40920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 410ba8128f9db82da66f28c6e6740d4721d80da954eDongwon Kangsp<MediaSource> MP3Extractor::getTrack(size_t index) { 411772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mInitCheck != OK || index != 0) { 412693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber return NULL; 41320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 41420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 415693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber return new MP3Source( 416ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang mMeta, mDataSource, mFirstFramePos, mFixedHeader, 4174456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mSeeker); 41820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 41920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 42084333e0475bc911adc16417f4ca327c975cf6c36Andreas Hubersp<MetaData> MP3Extractor::getTrackMetaData( 42184333e0475bc911adc16417f4ca327c975cf6c36Andreas Huber size_t index, uint32_t /* flags */) { 422772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mInitCheck != OK || index != 0) { 42320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return NULL; 42420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 42520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 42620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return mMeta; 42720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 42820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 42920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber//////////////////////////////////////////////////////////////////////////////// 43020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 431a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman// The theoretical maximum frame size for an MPEG audio stream should occur 432a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman// while playing a Layer 2, MPEGv2.5 audio stream at 160kbps (with padding). 433a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman// The size of this frame should be... 434a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman// ((1152 samples/frame * 160000 bits/sec) / 435a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman// (8000 samples/sec * 8 bits/byte)) + 1 padding byte/frame = 2881 bytes/frame. 436a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossman// Set our max frame size to the nearest power of 2 above this size (aka, 4kB) 437a39ad61a1c9c69c2cc60f5d14243dd56040f8571John Grossmanconst size_t MP3Source::kMaxFrameSize = (1 << 12); /* 4096 bytes */ 43820111aa043c5f404472bc63b90bc5aad906b1101Andreas HuberMP3Source::MP3Source( 439693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber const sp<MetaData> &meta, const sp<DataSource> &source, 440c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t first_frame_pos, uint32_t fixed_header, 4414456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber const sp<MP3Seeker> &seeker) 44220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber : mMeta(meta), 44320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mDataSource(source), 44420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mFirstFramePos(first_frame_pos), 44520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mFixedHeader(fixed_header), 44620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos(0), 44720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentTimeUs(0), 44820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mStarted(false), 4494456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mSeeker(seeker), 450a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mGroup(NULL), 451a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mBasisTimeUs(0), 452a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead(0) { 45320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 45420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 45520111aa043c5f404472bc63b90bc5aad906b1101Andreas HuberMP3Source::~MP3Source() { 45620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (mStarted) { 45720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber stop(); 45820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 45920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 46020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 46120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t MP3Source::start(MetaData *) { 4620c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber CHECK(!mStarted); 46320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 46420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mGroup = new MediaBufferGroup; 46520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 46620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mGroup->add_buffer(new MediaBuffer(kMaxFrameSize)); 46720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 46820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos = mFirstFramePos; 46920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentTimeUs = 0; 47020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 471a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mBasisTimeUs = mCurrentTimeUs; 472a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead = 0; 473a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 47420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mStarted = true; 47520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 47620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return OK; 47720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 47820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 47920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t MP3Source::stop() { 4800c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber CHECK(mStarted); 48120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 48220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber delete mGroup; 48320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mGroup = NULL; 48420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 48520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mStarted = false; 48620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 48720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return OK; 48820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 48920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 49020111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubersp<MetaData> MP3Source::getFormat() { 49120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return mMeta; 49220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 49320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 49420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t MP3Source::read( 49520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBuffer **out, const ReadOptions *options) { 49620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *out = NULL; 49720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 49820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber int64_t seekTimeUs; 499abd1f4f870925d6776dbe4b930b759a1ab6595caAndreas Huber ReadOptions::SeekMode mode; 500f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang bool seekCBR = false; 501f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang 502abd1f4f870925d6776dbe4b930b759a1ab6595caAndreas Huber if (options != NULL && options->getSeekTo(&seekTimeUs, &mode)) { 5034456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int64_t actualSeekTimeUs = seekTimeUs; 5044456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (mSeeker == NULL 5054456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber || !mSeeker->getOffsetForTime(&actualSeekTimeUs, &mCurrentPos)) { 5064456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber int32_t bitrate; 5074456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (!mMeta->findInt32(kKeyBitRate, &bitrate)) { 5084456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber // bitrate is in bits/sec. 509df64d15042bbd5e0e4933ac49bf3c177dd94752cSteve Block ALOGI("no bitrate"); 5104456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 5114456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber return ERROR_UNSUPPORTED; 512ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang } 5134456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber 5144456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mCurrentTimeUs = seekTimeUs; 515ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang mCurrentPos = mFirstFramePos + seekTimeUs * bitrate / 8000000; 516f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang seekCBR = true; 5174456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber } else { 5184456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber mCurrentTimeUs = actualSeekTimeUs; 519ac6e6569f08911df9d5c96285cf15325cbbf0340Gloria Wang } 520a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 521a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mBasisTimeUs = mCurrentTimeUs; 522a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead = 0; 52320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 52420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 52520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber MediaBuffer *buffer; 52620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber status_t err = mGroup->acquire_buffer(&buffer); 52720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (err != OK) { 52820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return err; 52920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 53020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 53120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber size_t frame_size; 5323e0339f9ec42c2c31deb632254e9cc8a06d3db91Andreas Huber int bitrate; 533a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int num_samples; 534a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons int sample_rate; 53520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber for (;;) { 53634769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), 4); 53720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (n < 4) { 53820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->release(); 53920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer = NULL; 54020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 541231fd353518502e3a05021473ae60e7addd9a46cWei Jia return (n < 0 ? n : ERROR_END_OF_STREAM); 54220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 54320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 54420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t header = U32_AT((const uint8_t *)buffer->data()); 545541962997b4076da11546619f082467ffd9bcd1fAndreas Huber 546541962997b4076da11546619f082467ffd9bcd1fAndreas Huber if ((header & kMask) == (mFixedHeader & kMask) 547386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber && GetMPEGAudioFrameSize( 548386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber header, &frame_size, &sample_rate, NULL, 549386d609dc513e838c7e7c4c46c604493ccd560beAndreas Huber &bitrate, &num_samples)) { 550f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang 551f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang // re-calculate mCurrentTimeUs because we might have called Resync() 552f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang if (seekCBR) { 553f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang mCurrentTimeUs = (mCurrentPos - mFirstFramePos) * 8000 / bitrate; 554f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang mBasisTimeUs = mCurrentTimeUs; 555f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang } 556f9d566ef54954c5e7b913275438e8022fb194ad6Gloria Wang 55720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber break; 55820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 55920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 56020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber // Lost sync. 5613856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("lost sync! header = 0x%08x, old header = 0x%08x\n", header, mFixedHeader); 56220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 563c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = mCurrentPos; 5644456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (!Resync(mDataSource, mFixedHeader, &pos, NULL, NULL)) { 56529357bc2c0dd7c43ad3bd0c8e3efa4e6fd9bfd47Steve Block ALOGE("Unable to resync. Signalling end of stream."); 56620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 56720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->release(); 56820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer = NULL; 56920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 57020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return ERROR_END_OF_STREAM; 57120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 57220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 57320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos = pos; 57420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 57520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber // Try again with the new position. 57620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 57720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 5780c89199745bc1bf05b997fc7c342017807676b6fAndreas Huber CHECK(frame_size <= buffer->size()); 57920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 58034769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber ssize_t n = mDataSource->readAt(mCurrentPos, buffer->data(), frame_size); 58120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (n < (ssize_t)frame_size) { 58220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->release(); 58320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer = NULL; 58420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 585231fd353518502e3a05021473ae60e7addd9a46cWei Jia return (n < 0 ? n : ERROR_END_OF_STREAM); 58620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 58720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 58820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber buffer->set_range(0, frame_size); 58920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 59048c948b1137e7bbdb161b51908657ab72ac5e2daAndreas Huber buffer->meta_data()->setInt64(kKeyTime, mCurrentTimeUs); 5918bf59e735760af0b6a85747fd90bf8cf1e5388d7Andreas Huber buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); 59220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 59320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mCurrentPos += frame_size; 594a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons 595a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mSamplesRead += num_samples; 596a9e05b911f978dc3f25d4b1e35e51383dc4f9fc7Jason Simmons mCurrentTimeUs = mBasisTimeUs + ((mSamplesRead * 1000000) / sample_rate); 59720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 59820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *out = buffer; 59920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 60020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return OK; 60120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 60220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 603fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Hubersp<MetaData> MP3Extractor::getMetaData() { 604fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber sp<MetaData> meta = new MetaData; 605fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 606772bcc27ba7c1fd42c72ecaca55d533328bd18e7Andreas Huber if (mInitCheck != OK) { 6077be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber return meta; 6087be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber } 6097be6407f2ad7f2b0782d195d9f792072c084d6f5Andreas Huber 610fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setCString(kKeyMIMEType, "audio/mpeg"); 611fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 612fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber ID3 id3(mDataSource); 613fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 614fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (!id3.isValid()) { 615fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return meta; 616fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 617fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 618fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber struct Map { 619fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber int key; 620fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const char *tag1; 621fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const char *tag2; 622fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber }; 623fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber static const Map kMap[] = { 624fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyAlbum, "TALB", "TAL" }, 625fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyArtist, "TPE1", "TP1" }, 62666ac4df65516ebfd0e500bfca75dc4b5ef8d674eMarco Nelissen { kKeyAlbumArtist, "TPE2", "TP2" }, 627fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyComposer, "TCOM", "TCM" }, 628fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyGenre, "TCON", "TCO" }, 629bd4bc59262df90dc85752684a1d4a92833a535a3Andreas Huber { kKeyTitle, "TIT2", "TT2" }, 630fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber { kKeyYear, "TYE", "TYER" }, 631bd4bc59262df90dc85752684a1d4a92833a535a3Andreas Huber { kKeyAuthor, "TXT", "TEXT" }, 632bd4bc59262df90dc85752684a1d4a92833a535a3Andreas Huber { kKeyCDTrackNumber, "TRK", "TRCK" }, 6336c8a9a4132337a3419a72a735f0b40df0b82061fMarco Nelissen { kKeyDiscNumber, "TPA", "TPOS" }, 63411f8109ad8646d3acd9a0987613229cde59d52c1Marco Nelissen { kKeyCompilation, "TCP", "TCMP" }, 635fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber }; 636fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]); 637fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 638fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber for (size_t i = 0; i < kNumMapEntries; ++i) { 639fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1); 640fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (it->done()) { 641fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete it; 642fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it = new ID3::Iterator(id3, kMap[i].tag2); 643fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 644fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 645fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (it->done()) { 646fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete it; 647fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber continue; 648fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 649fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 650fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber String8 s; 651fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber it->getString(&s); 652fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber delete it; 653fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 654fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setCString(kMap[i].key, s); 655fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 656fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 657fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber size_t dataSize; 658fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber String8 mime; 659fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber const void *data = id3.getAlbumArt(&dataSize, &mime); 660fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 661fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber if (data) { 662fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setData(kKeyAlbumArt, MetaData::TYPE_NONE, data, dataSize); 663fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber meta->setCString(kKeyAlbumArtMIME, mime.string()); 664fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber } 665fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 666fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber return meta; 667fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber} 668fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 66975226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissenstatic MediaExtractor* CreateExtractor( 67075226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen const sp<DataSource> &source, 67175226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen const sp<AMessage>& meta) { 67275226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen return new MP3Extractor(source, meta); 67375226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen} 67475226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen 67575226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissenstatic MediaExtractor::CreatorFunc Sniff( 6765a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber const sp<DataSource> &source, String8 *mimeType, 6775a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber float *confidence, sp<AMessage> *meta) { 678c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t pos = 0; 679c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong off64_t post_id3_pos; 68020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber uint32_t header; 6814456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber if (!Resync(source, 0, &pos, &post_id3_pos, &header)) { 68275226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen return NULL; 68320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 68420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 6855a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber *meta = new AMessage; 6865a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber (*meta)->setInt64("offset", pos); 6875a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber (*meta)->setInt32("header", header); 6884456da54bcd206ed1f518c69cc959ca65a179c83Andreas Huber (*meta)->setInt64("post-id3-offset", post_id3_pos); 6895a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber 69018291bc20e55e8f3fd5feb786771a8ed32c19c59Andreas Huber *mimeType = MEDIA_MIMETYPE_AUDIO_MPEG; 6915a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber *confidence = 0.2f; 69220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 69375226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen return CreateExtractor; 69420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 69520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 69675226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissenextern "C" { 69775226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen// This is the only symbol that needs to be exported 69875226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen__attribute__ ((visibility ("default"))) 69975226177f20a176d50e3e53bbb34067cb49112c3Marco NelissenMediaExtractor::ExtractorDef GETEXTRACTORDEF() { 70075226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen return { 70175226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen MediaExtractor::EXTRACTORDEF_VERSION, 70275226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen UUID("812a3f6c-c8cf-46de-b529-3774b14103d4"), 70375226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen 1, // version 70475226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen "MP3 Extractor", 70575226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen Sniff 70675226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen }; 70775226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen} 70875226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen 70975226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen} // extern "C" 71075226177f20a176d50e3e53bbb34067cb49112c3Marco Nelissen 71120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} // namespace android 712