omx_jpeg_decoder.cpp revision 6215d3ff4b5dfa52a5d8b9a42e343051f31066a5 
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_TAG "OmxJpegDecoder"
18#include <sys/time.h>
19#include <utils/Log.h>
20
21#include <stdlib.h>
22#include <string.h>
23#include <unistd.h>
24
25#include <binder/IServiceManager.h>
26#include <binder/ProcessState.h>
27#include <media/IMediaPlayerService.h>
28#include <media/stagefright/MediaDebug.h>
29#include <media/stagefright/MediaSource.h>
30#include <media/stagefright/MetaData.h>
31#include <media/stagefright/OMXClient.h>
32#include <media/stagefright/OMXCodec.h>
33#include <SkMallocPixelRef.h>
34
35#include "omx_jpeg_decoder.h"
36#include "SkOmxPixelRef.h"
37#include "StreamSource.h"
38
39using namespace android;
40
41static void getJpegOutput(MediaBuffer* buffer, const char* filename) {
42    int size = buffer->range_length();
43    int offset = buffer->range_offset();
44    FILE *pFile = fopen(filename, "w+");
45
46    if (pFile == NULL) {
47        printf("Error: cannot open %s.\n", filename);
48    } else {
49        char* data = (char*) buffer->data();
50        data += offset;
51        while (size > 0) {
52            int numChars = fwrite(data, sizeof(char), 1024, pFile);
53            int numBytes = numChars * sizeof(char);
54            size -= numBytes;
55            data += numBytes;
56        }
57        fclose(pFile);
58    }
59    return;
60}
61
62extern int storeBitmapToFile(SkBitmap* bitmap, const char* filename) {
63    bitmap->lockPixels();
64    uint8_t* data = (uint8_t *)bitmap->getPixels();
65    int size = bitmap->getSize();
66    FILE* fp = fopen(filename, "w+");
67
68    if (NULL == fp) {
69        printf("Cannot open the output file! \n");
70        return -1;
71    } else {
72        while (size > 0) {
73            int numChars = fwrite(data, sizeof(char), 1024, fp);
74            int numBytes = numChars * sizeof(char);
75            size -= numBytes;
76            data += numBytes;
77        }
78        fclose(fp);
79    }
80    return 0;
81}
82
83static int64_t getNowUs() {
84    struct timeval tv;
85    gettimeofday(&tv, NULL);
86
87    return (int64_t)tv.tv_usec + tv.tv_sec * 1000000;
88}
89
90OmxJpegImageDecoder::OmxJpegImageDecoder() {
91    status_t err = mClient.connect();
92    CHECK_EQ(err, OK);
93}
94
95OmxJpegImageDecoder::~OmxJpegImageDecoder() {
96    mClient.disconnect();
97}
98
99bool OmxJpegImageDecoder::onDecode(SkStream* stream,
100        SkBitmap* bm, Mode mode) {
101    sp<MediaSource> source = prepareMediaSource(stream);
102    sp<MetaData> meta = source->getFormat();
103    int width;
104    int height;
105    meta->findInt32(kKeyWidth, &width);
106    meta->findInt32(kKeyHeight, &height);
107    configBitmapSize(bm, getPrefConfig(k32Bit_SrcDepth, false), width, height);
108
109    // mode == DecodeBounds
110    if (mode == SkImageDecoder::kDecodeBounds_Mode) {
111        return true;
112    }
113
114    // mode == DecodePixels
115    if (!this->allocPixelRef(bm, NULL)) {
116        ALOGI("Cannot allocPixelRef()!");
117        return false;
118    }
119
120    sp<MediaSource> decoder = getDecoder(&mClient, source);
121    return decodeSource(decoder, source, bm);
122}
123
124JPEGSource* OmxJpegImageDecoder::prepareMediaSource(SkStream* stream) {
125    DataSource::RegisterDefaultSniffers();
126    sp<DataSource> dataSource = new StreamSource(stream);
127    return new JPEGSource(dataSource);
128}
129
130sp<MediaSource> OmxJpegImageDecoder::getDecoder(
131        OMXClient *client, const sp<MediaSource>& source) {
132    sp<MetaData> meta = source->getFormat();
133    sp<MediaSource> decoder = OMXCodec::Create(
134            client->interface(), meta, false /* createEncoder */, source);
135
136    CHECK(decoder != NULL);
137    return decoder;
138}
139
140bool OmxJpegImageDecoder::decodeSource(sp<MediaSource> decoder,
141        const sp<MediaSource>& source, SkBitmap* bm) {
142    status_t rt = decoder->start();
143    if (rt != OK) {
144        LOGE("Cannot start OMX Decoder!");
145        return false;
146    }
147    int64_t startTime = getNowUs();
148    MediaBuffer *buffer;
149
150    // decode source
151    status_t err = decoder->read(&buffer, NULL);
152    int64_t duration = getNowUs() - startTime;
153
154    if (err != OK) {
155        CHECK_EQ(buffer, NULL);
156    }
157    printf("Duration in decoder->read(): %.1f (msecs). \n",
158                duration / 1E3 );
159
160    /* Mark the code for now, since we attend to copy buffer to SkBitmap.
161    // Install pixelRef to Bitmap.
162    installPixelRef(buffer, decoder, bm);*/
163
164    // Copy pixels from buffer to bm.
165    // May need to check buffer->rawBytes() == bm->rawBytes().
166    CHECK_EQ(buffer->size(), bm->getSize());
167    memcpy(bm->getPixels(), buffer->data(), buffer->size());
168    buffer->release();
169    decoder->stop();
170
171    return true;
172}
173
174void OmxJpegImageDecoder::installPixelRef(MediaBuffer *buffer, sp<MediaSource> decoder,
175        SkBitmap* bm) {
176
177    // set bm's pixelref based on the data in buffer.
178    SkAutoLockPixels alp(*bm);
179    SkPixelRef* pr = new SkOmxPixelRef(NULL, buffer, decoder);
180    bm->setPixelRef(pr)->unref();
181    bm->lockPixels();
182    return;
183}
184
185void OmxJpegImageDecoder::configBitmapSize(SkBitmap* bm, SkBitmap::Config pref,
186        int width, int height) {
187    bm->setConfig(getColorSpaceConfig(pref), width, height);
188    bm->setIsOpaque(true);
189}
190
191SkBitmap::Config OmxJpegImageDecoder::getColorSpaceConfig(
192        SkBitmap::Config pref) {
193
194    // Set the color space to ARGB_8888 for now
195    // because of limitation in hardware support.
196    return SkBitmap::kARGB_8888_Config;
197}
198