CameraParameters2.cpp revision 0b88a62d4d5ac1e515721e587cdf9bcec191812b 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "CameraParams2"
19// #define LOG_NDEBUG 0
20#include <utils/Log.h>
21
22#include <string.h>
23#include <stdlib.h>
24#include <camera/CameraParameters2.h>
25
26namespace android {
27
28CameraParameters2::CameraParameters2()
29                : mMap()
30{
31}
32
33CameraParameters2::~CameraParameters2()
34{
35}
36
37String8 CameraParameters2::flatten() const
38{
39    String8 flattened("");
40    size_t size = mMap.size();
41
42    for (size_t i = 0; i < size; i++) {
43        String8 k, v;
44        k = mMap.keyAt(i);
45        v = mMap.valueAt(i);
46
47        flattened += k;
48        flattened += "=";
49        flattened += v;
50        if (i != size-1)
51            flattened += ";";
52    }
53
54    ALOGV("%s: Flattened params = %s", __FUNCTION__, flattened.string());
55
56    return flattened;
57}
58
59void CameraParameters2::unflatten(const String8 &params)
60{
61    const char *a = params.string();
62    const char *b;
63
64    mMap.clear();
65
66    for (;;) {
67        // Find the bounds of the key name.
68        b = strchr(a, '=');
69        if (b == 0)
70            break;
71
72        // Create the key string.
73        String8 k(a, (size_t)(b-a));
74
75        // Find the value.
76        a = b+1;
77        b = strchr(a, ';');
78        if (b == 0) {
79            // If there's no semicolon, this is the last item.
80            String8 v(a);
81            mMap.add(k, v);
82            break;
83        }
84
85        String8 v(a, (size_t)(b-a));
86        mMap.add(k, v);
87        a = b+1;
88    }
89}
90
91
92void CameraParameters2::set(const char *key, const char *value)
93{
94    // XXX i think i can do this with strspn()
95    if (strchr(key, '=') || strchr(key, ';')) {
96        //XXX ALOGE("Key \"%s\"contains invalid character (= or ;)", key);
97        return;
98    }
99
100    if (strchr(value, '=') || strchr(value, ';')) {
101        //XXX ALOGE("Value \"%s\"contains invalid character (= or ;)", value);
102        return;
103    }
104
105    // Replacing a value updates the key's order to be the new largest order
106    ssize_t res = mMap.replaceValueFor(String8(key), String8(value));
107    LOG_ALWAYS_FATAL_IF(res < 0, "replaceValueFor(%s,%s) failed", key, value);
108}
109
110void CameraParameters2::set(const char *key, int value)
111{
112    char str[16];
113    sprintf(str, "%d", value);
114    set(key, str);
115}
116
117void CameraParameters2::setFloat(const char *key, float value)
118{
119    char str[16];  // 14 should be enough. We overestimate to be safe.
120    snprintf(str, sizeof(str), "%g", value);
121    set(key, str);
122}
123
124const char *CameraParameters2::get(const char *key) const
125{
126    ssize_t idx = mMap.indexOfKey(String8(key));
127    if (idx < 0) {
128        return NULL;
129    } else {
130        return mMap.valueAt(idx).string();
131    }
132}
133
134int CameraParameters2::getInt(const char *key) const
135{
136    const char *v = get(key);
137    if (v == 0)
138        return -1;
139    return strtol(v, 0, 0);
140}
141
142float CameraParameters2::getFloat(const char *key) const
143{
144    const char *v = get(key);
145    if (v == 0) return -1;
146    return strtof(v, 0);
147}
148
149status_t CameraParameters2::compareSetOrder(const char *key1, const char *key2,
150        int *order) const {
151    if (key1 == NULL) {
152        ALOGE("%s: key1 must not be NULL", __FUNCTION__);
153        return BAD_VALUE;
154    } else if (key2 == NULL) {
155        ALOGE("%s: key2 must not be NULL", __FUNCTION__);
156        return BAD_VALUE;
157    } else if (order == NULL) {
158        ALOGE("%s: order must not be NULL", __FUNCTION__);
159        return BAD_VALUE;
160    }
161
162    ssize_t index1 = mMap.indexOfKey(String8(key1));
163    ssize_t index2 = mMap.indexOfKey(String8(key2));
164    if (index1 < 0) {
165        ALOGW("%s: Key1 (%s) was not set", __FUNCTION__, key1);
166        return NAME_NOT_FOUND;
167    } else if (index2 < 0) {
168        ALOGW("%s: Key2 (%s) was not set", __FUNCTION__, key2);
169        return NAME_NOT_FOUND;
170    }
171
172    *order = (index1 == index2) ? 0  :
173             (index1 < index2)  ? -1 :
174             1;
175
176    return OK;
177}
178
179void CameraParameters2::remove(const char *key)
180{
181    mMap.removeItem(String8(key));
182}
183
184// Parse string like "640x480" or "10000,20000"
185static int parse_pair(const char *str, int *first, int *second, char delim,
186                      char **endptr = NULL)
187{
188    // Find the first integer.
189    char *end;
190    int w = (int)strtol(str, &end, 10);
191    // If a delimeter does not immediately follow, give up.
192    if (*end != delim) {
193        ALOGE("Cannot find delimeter (%c) in str=%s", delim, str);
194        return -1;
195    }
196
197    // Find the second integer, immediately after the delimeter.
198    int h = (int)strtol(end+1, &end, 10);
199
200    *first = w;
201    *second = h;
202
203    if (endptr) {
204        *endptr = end;
205    }
206
207    return 0;
208}
209
210static void parseSizesList(const char *sizesStr, Vector<Size> &sizes)
211{
212    if (sizesStr == 0) {
213        return;
214    }
215
216    char *sizeStartPtr = (char *)sizesStr;
217
218    while (true) {
219        int width, height;
220        int success = parse_pair(sizeStartPtr, &width, &height, 'x',
221                                 &sizeStartPtr);
222        if (success == -1 || (*sizeStartPtr != ',' && *sizeStartPtr != '\0')) {
223            ALOGE("Picture sizes string \"%s\" contains invalid character.", sizesStr);
224            return;
225        }
226        sizes.push(Size(width, height));
227
228        if (*sizeStartPtr == '\0') {
229            return;
230        }
231        sizeStartPtr++;
232    }
233}
234
235void CameraParameters2::setPreviewSize(int width, int height)
236{
237    char str[32];
238    sprintf(str, "%dx%d", width, height);
239    set(CameraParameters::KEY_PREVIEW_SIZE, str);
240}
241
242void CameraParameters2::getPreviewSize(int *width, int *height) const
243{
244    *width = *height = -1;
245    // Get the current string, if it doesn't exist, leave the -1x-1
246    const char *p = get(CameraParameters::KEY_PREVIEW_SIZE);
247    if (p == 0)  return;
248    parse_pair(p, width, height, 'x');
249}
250
251void CameraParameters2::getPreferredPreviewSizeForVideo(int *width, int *height) const
252{
253    *width = *height = -1;
254    const char *p = get(CameraParameters::KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO);
255    if (p == 0)  return;
256    parse_pair(p, width, height, 'x');
257}
258
259void CameraParameters2::getSupportedPreviewSizes(Vector<Size> &sizes) const
260{
261    const char *previewSizesStr = get(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES);
262    parseSizesList(previewSizesStr, sizes);
263}
264
265void CameraParameters2::setVideoSize(int width, int height)
266{
267    char str[32];
268    sprintf(str, "%dx%d", width, height);
269    set(CameraParameters::KEY_VIDEO_SIZE, str);
270}
271
272void CameraParameters2::getVideoSize(int *width, int *height) const
273{
274    *width = *height = -1;
275    const char *p = get(CameraParameters::KEY_VIDEO_SIZE);
276    if (p == 0) return;
277    parse_pair(p, width, height, 'x');
278}
279
280void CameraParameters2::getSupportedVideoSizes(Vector<Size> &sizes) const
281{
282    const char *videoSizesStr = get(CameraParameters::KEY_SUPPORTED_VIDEO_SIZES);
283    parseSizesList(videoSizesStr, sizes);
284}
285
286void CameraParameters2::setPreviewFrameRate(int fps)
287{
288    set(CameraParameters::KEY_PREVIEW_FRAME_RATE, fps);
289}
290
291int CameraParameters2::getPreviewFrameRate() const
292{
293    return getInt(CameraParameters::KEY_PREVIEW_FRAME_RATE);
294}
295
296void CameraParameters2::getPreviewFpsRange(int *min_fps, int *max_fps) const
297{
298    *min_fps = *max_fps = -1;
299    const char *p = get(CameraParameters::KEY_PREVIEW_FPS_RANGE);
300    if (p == 0) return;
301    parse_pair(p, min_fps, max_fps, ',');
302}
303
304void CameraParameters2::setPreviewFpsRange(int min_fps, int max_fps)
305{
306    String8 str = String8::format("%d,%d", min_fps, max_fps);
307    set(CameraParameters::KEY_PREVIEW_FPS_RANGE, str.string());
308}
309
310void CameraParameters2::setPreviewFormat(const char *format)
311{
312    set(CameraParameters::KEY_PREVIEW_FORMAT, format);
313}
314
315const char *CameraParameters2::getPreviewFormat() const
316{
317    return get(CameraParameters::KEY_PREVIEW_FORMAT);
318}
319
320void CameraParameters2::setPictureSize(int width, int height)
321{
322    char str[32];
323    sprintf(str, "%dx%d", width, height);
324    set(CameraParameters::KEY_PICTURE_SIZE, str);
325}
326
327void CameraParameters2::getPictureSize(int *width, int *height) const
328{
329    *width = *height = -1;
330    // Get the current string, if it doesn't exist, leave the -1x-1
331    const char *p = get(CameraParameters::KEY_PICTURE_SIZE);
332    if (p == 0) return;
333    parse_pair(p, width, height, 'x');
334}
335
336void CameraParameters2::getSupportedPictureSizes(Vector<Size> &sizes) const
337{
338    const char *pictureSizesStr = get(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES);
339    parseSizesList(pictureSizesStr, sizes);
340}
341
342void CameraParameters2::setPictureFormat(const char *format)
343{
344    set(CameraParameters::KEY_PICTURE_FORMAT, format);
345}
346
347const char *CameraParameters2::getPictureFormat() const
348{
349    return get(CameraParameters::KEY_PICTURE_FORMAT);
350}
351
352void CameraParameters2::dump() const
353{
354    ALOGD("dump: mMap.size = %d", mMap.size());
355    for (size_t i = 0; i < mMap.size(); i++) {
356        String8 k, v;
357        k = mMap.keyAt(i);
358        v = mMap.valueAt(i);
359        ALOGD("%s: %s\n", k.string(), v.string());
360    }
361}
362
363status_t CameraParameters2::dump(int fd, const Vector<String16>& args) const
364{
365    (void)args;
366    const size_t SIZE = 256;
367    char buffer[SIZE];
368    String8 result;
369    snprintf(buffer, 255, "CameraParameters2::dump: mMap.size = %zu\n", mMap.size());
370    result.append(buffer);
371    for (size_t i = 0; i < mMap.size(); i++) {
372        String8 k, v;
373        k = mMap.keyAt(i);
374        v = mMap.valueAt(i);
375        snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
376        result.append(buffer);
377    }
378    write(fd, result.string(), result.size());
379    return NO_ERROR;
380}
381
382}; // namespace android
383