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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <MimeTypeUtil.h>
#include <utils/Log.h>
namespace android {
#undef LOG_TAG
#define LOG_TAG "MimeTypeUtil"
#ifdef DRM_OMA_FL_ENGINE_DEBUG
#define LOG_NDEBUG 0
#define LOG_DEBUG(...) ALOGD(__VA_ARGS__)
#else
#define LOG_DEBUG(...)
#endif
enum {
MIMETYPE_AUDIO = 0,
MIMETYPE_APPLICATION = 1,
MIMETYPE_IMAGE = 2,
MIMETYPE_VIDEO = 3,
MIMETYPE_LAST = -1,
};
struct MimeGroup{
int type; // Audio, video,.. use the enum values
const char* pGroup; // "audio/", "video/",.. should contain the last "/"
int size; // Number of bytes. e.g. "audio/" = 6 bytes
};
struct MimeTypeList{
int type;
const char* pMimeExt; // Everything after the '/' e.g. audio/x-mpeg -> "x-mpeg"
int size; // Number of bytes. e.g. "x-mpeg" = 6 bytes
const char* pMimeType; // Mimetype that should be returned
};
// Known mimetypes by android
static const char mime_type_audio_mpeg[] = "audio/mpeg";
static const char mime_type_audio_3gpp[] = "audio/3gpp";
static const char mime_type_audio_amr[] = "audio/amr-wb";
static const char mime_type_audio_aac[] = "audio/mp4a-latm";
static const char mime_type_audio_wav[] = "audio/wav";
static const char mime_type_video_mpeg4[] = "video/mpeg4";
static const char mime_type_video_3gpp[] = "video/3gpp";
// Known mimetype groups
static const char mime_group_audio[] = "audio/";
static const char mime_group_application[] = "application/";
static const char mime_group_image[] = "image/";
static const char mime_group_video[] = "video/";
static const char mime_type_unsupported[] = "unsupported/drm.mimetype";
static struct MimeGroup mimeGroup[] = {
{MIMETYPE_AUDIO, mime_group_audio, sizeof(mime_group_audio)-1},
{MIMETYPE_APPLICATION, mime_group_application, sizeof(mime_group_application)-1},
{MIMETYPE_IMAGE, mime_group_image, sizeof(mime_group_image)-1},
{MIMETYPE_VIDEO, mime_group_video, sizeof(mime_group_video)-1},
{MIMETYPE_LAST, NULL, 0} // Must be last entry
};
// List of all mimetypes that should be converted.
static struct MimeTypeList mimeTypeList[] = {
// Mp3 mime types
{MIMETYPE_AUDIO, "mp3", sizeof("mp3")-1, mime_type_audio_mpeg},
{MIMETYPE_AUDIO, "x-mpeg", sizeof("x-mpeg")-1, mime_type_audio_mpeg},
{MIMETYPE_AUDIO, "x-mp3", sizeof("x-mp3")-1, mime_type_audio_mpeg},
{MIMETYPE_AUDIO, "mpg", sizeof("mpg")-1, mime_type_audio_mpeg},
{MIMETYPE_AUDIO, "mpg3", sizeof("mpg")-1, mime_type_audio_mpeg},
{MIMETYPE_AUDIO, "x-mpg", sizeof("x-mpg")-1, mime_type_audio_mpeg},
{MIMETYPE_AUDIO, "x-mpegaudio", sizeof("x-mpegaudio")-1, mime_type_audio_mpeg},
// 3gpp audio mime types
{MIMETYPE_AUDIO, "3gp", sizeof("3gp")-1, mime_type_audio_3gpp},
// Amr audio mime types
{MIMETYPE_AUDIO, "amr", sizeof("amr")-1, mime_type_audio_amr},
// Aac audio mime types
{MIMETYPE_AUDIO, "aac", sizeof("aac")-1, mime_type_audio_aac},
// Wav audio mime types
{MIMETYPE_AUDIO, "x-wav", sizeof("x-wav")-1, mime_type_audio_wav},
// Mpeg4 video mime types
{MIMETYPE_VIDEO, "mpg4", sizeof("mpg4")-1, mime_type_video_mpeg4},
{MIMETYPE_VIDEO, "mp4v-es", sizeof("mp4v-es")-1, mime_type_video_mpeg4},
// 3gpp video mime types
{MIMETYPE_VIDEO, "3gp", sizeof("3gp")-1, mime_type_video_3gpp},
// Must be last entry
{MIMETYPE_LAST, NULL, 0, NULL}
};
/**
* May convert the mimetype if there is a well known
* replacement mimetype otherwise the original mimetype
* is returned.
*
* If the mimetype is of unsupported group i.e. application/*
* then "unsupported/drm.mimetype" will be returned.
*
* @param mimeType - mimetype in lower case to convert.
*
* @return mimetype or "unsupported/drm.mimetype".
*/
String8 MimeTypeUtil::convertMimeType(String8& mimeType) {
String8 result = mimeType;
const char* pMimeType;
struct MimeGroup* pGroup;
struct MimeTypeList* pMimeItem;
int len;
pMimeType = mimeType.string();
if (NULL != pMimeType) {
if ((0 == strncmp(pMimeType, mime_group_audio, (sizeof mime_group_audio) - 1)) ||
(0 == strncmp(pMimeType, mime_group_video, (sizeof mime_group_video) - 1))) {
/* Check which group the mimetype is */
pGroup = mimeGroup;
while (MIMETYPE_LAST != pGroup->type) {
if (0 == strncmp(pMimeType, pGroup->pGroup, pGroup->size)) {
break;
}
pGroup++;
}
/* Go through the mimetype list. Only check items of the correct group */
if (MIMETYPE_LAST != pGroup->type) {
pMimeItem = mimeTypeList;
len = strlen (pMimeType+pGroup->size);
while (MIMETYPE_LAST != pMimeItem->type) {
if ((pGroup->type == pMimeItem->type) &&
(len == pMimeItem->size) &&
(0 == strcmp(pMimeType+pGroup->size, pMimeItem->pMimeExt))) {
result = String8(pMimeItem->pMimeType);
break;
}
pMimeItem++;
}
}
} else {
result = String8(mime_type_unsupported);
}
LOG_DEBUG("convertMimeType got mimetype %s, converted into mimetype %s",
pMimeType, result.string());
}
return result;
}
};
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