Utils.cpp revision 9806555d3930be43e11106281dee354820ac1c88 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "Utils"
19#include <utils/Log.h>
20
21#include "include/ESDS.h"
22
23#include <arpa/inet.h>
24
25#include <media/stagefright/foundation/ABuffer.h>
26#include <media/stagefright/foundation/ADebug.h>
27#include <media/stagefright/foundation/AMessage.h>
28#include <media/stagefright/MetaData.h>
29#include <media/stagefright/Utils.h>
30
31namespace android {
32
33uint16_t U16_AT(const uint8_t *ptr) {
34    return ptr[0] << 8 | ptr[1];
35}
36
37uint32_t U32_AT(const uint8_t *ptr) {
38    return ptr[0] << 24 | ptr[1] << 16 | ptr[2] << 8 | ptr[3];
39}
40
41uint64_t U64_AT(const uint8_t *ptr) {
42    return ((uint64_t)U32_AT(ptr)) << 32 | U32_AT(ptr + 4);
43}
44
45uint16_t U16LE_AT(const uint8_t *ptr) {
46    return ptr[0] | (ptr[1] << 8);
47}
48
49uint32_t U32LE_AT(const uint8_t *ptr) {
50    return ptr[3] << 24 | ptr[2] << 16 | ptr[1] << 8 | ptr[0];
51}
52
53uint64_t U64LE_AT(const uint8_t *ptr) {
54    return ((uint64_t)U32LE_AT(ptr + 4)) << 32 | U32LE_AT(ptr);
55}
56
57// XXX warning: these won't work on big-endian host.
58uint64_t ntoh64(uint64_t x) {
59    return ((uint64_t)ntohl(x & 0xffffffff) << 32) | ntohl(x >> 32);
60}
61
62uint64_t hton64(uint64_t x) {
63    return ((uint64_t)htonl(x & 0xffffffff) << 32) | htonl(x >> 32);
64}
65
66status_t convertMetaDataToMessage(
67        const sp<MetaData> &meta, sp<AMessage> *format) {
68    format->clear();
69
70    const char *mime;
71    CHECK(meta->findCString(kKeyMIMEType, &mime));
72
73    sp<AMessage> msg = new AMessage;
74    msg->setString("mime", mime);
75
76    int64_t durationUs;
77    if (meta->findInt64(kKeyDuration, &durationUs)) {
78        msg->setInt64("durationUs", durationUs);
79    }
80
81    if (!strncasecmp("video/", mime, 6)) {
82        int32_t width, height;
83        CHECK(meta->findInt32(kKeyWidth, &width));
84        CHECK(meta->findInt32(kKeyHeight, &height));
85
86        msg->setInt32("width", width);
87        msg->setInt32("height", height);
88    } else if (!strncasecmp("audio/", mime, 6)) {
89        int32_t numChannels, sampleRate;
90        CHECK(meta->findInt32(kKeyChannelCount, &numChannels));
91        CHECK(meta->findInt32(kKeySampleRate, &sampleRate));
92
93        msg->setInt32("channel-count", numChannels);
94        msg->setInt32("sample-rate", sampleRate);
95
96        int32_t channelMask;
97        if (meta->findInt32(kKeyChannelMask, &channelMask)) {
98            msg->setInt32("channel-mask", channelMask);
99        }
100
101        int32_t delay = 0;
102        if (meta->findInt32(kKeyEncoderDelay, &delay)) {
103            msg->setInt32("encoder-delay", delay);
104        }
105        int32_t padding = 0;
106        if (meta->findInt32(kKeyEncoderPadding, &padding)) {
107            msg->setInt32("encoder-padding", padding);
108        }
109
110        int32_t isADTS;
111        if (meta->findInt32(kKeyIsADTS, &isADTS)) {
112            msg->setInt32("is-adts", true);
113        }
114    }
115
116    int32_t maxInputSize;
117    if (meta->findInt32(kKeyMaxInputSize, &maxInputSize)) {
118        msg->setInt32("max-input-size", maxInputSize);
119    }
120
121    uint32_t type;
122    const void *data;
123    size_t size;
124    if (meta->findData(kKeyAVCC, &type, &data, &size)) {
125        // Parse the AVCDecoderConfigurationRecord
126
127        const uint8_t *ptr = (const uint8_t *)data;
128
129        CHECK(size >= 7);
130        CHECK_EQ((unsigned)ptr[0], 1u);  // configurationVersion == 1
131        uint8_t profile = ptr[1];
132        uint8_t level = ptr[3];
133
134        // There is decodable content out there that fails the following
135        // assertion, let's be lenient for now...
136        // CHECK((ptr[4] >> 2) == 0x3f);  // reserved
137
138        size_t lengthSize = 1 + (ptr[4] & 3);
139
140        // commented out check below as H264_QVGA_500_NO_AUDIO.3gp
141        // violates it...
142        // CHECK((ptr[5] >> 5) == 7);  // reserved
143
144        size_t numSeqParameterSets = ptr[5] & 31;
145
146        ptr += 6;
147        size -= 6;
148
149        sp<ABuffer> buffer = new ABuffer(1024);
150        buffer->setRange(0, 0);
151
152        for (size_t i = 0; i < numSeqParameterSets; ++i) {
153            CHECK(size >= 2);
154            size_t length = U16_AT(ptr);
155
156            ptr += 2;
157            size -= 2;
158
159            CHECK(size >= length);
160
161            memcpy(buffer->data() + buffer->size(), "\x00\x00\x00\x01", 4);
162            memcpy(buffer->data() + buffer->size() + 4, ptr, length);
163            buffer->setRange(0, buffer->size() + 4 + length);
164
165            ptr += length;
166            size -= length;
167        }
168
169        buffer->meta()->setInt32("csd", true);
170        buffer->meta()->setInt64("timeUs", 0);
171
172        msg->setBuffer("csd-0", buffer);
173
174        buffer = new ABuffer(1024);
175        buffer->setRange(0, 0);
176
177        CHECK(size >= 1);
178        size_t numPictureParameterSets = *ptr;
179        ++ptr;
180        --size;
181
182        for (size_t i = 0; i < numPictureParameterSets; ++i) {
183            CHECK(size >= 2);
184            size_t length = U16_AT(ptr);
185
186            ptr += 2;
187            size -= 2;
188
189            CHECK(size >= length);
190
191            memcpy(buffer->data() + buffer->size(), "\x00\x00\x00\x01", 4);
192            memcpy(buffer->data() + buffer->size() + 4, ptr, length);
193            buffer->setRange(0, buffer->size() + 4 + length);
194
195            ptr += length;
196            size -= length;
197        }
198
199        buffer->meta()->setInt32("csd", true);
200        buffer->meta()->setInt64("timeUs", 0);
201        msg->setBuffer("csd-1", buffer);
202    } else if (meta->findData(kKeyESDS, &type, &data, &size)) {
203        ESDS esds((const char *)data, size);
204        CHECK_EQ(esds.InitCheck(), (status_t)OK);
205
206        const void *codec_specific_data;
207        size_t codec_specific_data_size;
208        esds.getCodecSpecificInfo(
209                &codec_specific_data, &codec_specific_data_size);
210
211        sp<ABuffer> buffer = new ABuffer(codec_specific_data_size);
212
213        memcpy(buffer->data(), codec_specific_data,
214               codec_specific_data_size);
215
216        buffer->meta()->setInt32("csd", true);
217        buffer->meta()->setInt64("timeUs", 0);
218        msg->setBuffer("csd-0", buffer);
219    } else if (meta->findData(kKeyVorbisInfo, &type, &data, &size)) {
220        sp<ABuffer> buffer = new ABuffer(size);
221        memcpy(buffer->data(), data, size);
222
223        buffer->meta()->setInt32("csd", true);
224        buffer->meta()->setInt64("timeUs", 0);
225        msg->setBuffer("csd-0", buffer);
226
227        if (!meta->findData(kKeyVorbisBooks, &type, &data, &size)) {
228            return -EINVAL;
229        }
230
231        buffer = new ABuffer(size);
232        memcpy(buffer->data(), data, size);
233
234        buffer->meta()->setInt32("csd", true);
235        buffer->meta()->setInt64("timeUs", 0);
236        msg->setBuffer("csd-1", buffer);
237    }
238
239    *format = msg;
240
241    return OK;
242}
243
244}  // namespace android
245
246