1 /* 2 * Copyright (C) 2010 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 #ifndef AVC_UTILS_H_ 18 19 #define AVC_UTILS_H_ 20 21 #include <media/stagefright/foundation/ABuffer.h> 22 #include <utils/Errors.h> 23 24 namespace android { 25 26 struct ABitReader; 27 28 enum { 29 kAVCProfileBaseline = 0x42, 30 kAVCProfileMain = 0x4d, 31 kAVCProfileExtended = 0x58, 32 kAVCProfileHigh = 0x64, 33 kAVCProfileHigh10 = 0x6e, 34 kAVCProfileHigh422 = 0x7a, 35 kAVCProfileHigh444 = 0xf4, 36 kAVCProfileCAVLC444Intra = 0x2c 37 }; 38 39 // Optionally returns sample aspect ratio as well. 40 void FindAVCDimensions( 41 const sp<ABuffer> &seqParamSet, 42 int32_t *width, int32_t *height, 43 int32_t *sarWidth = NULL, int32_t *sarHeight = NULL); 44 45 unsigned parseUE(ABitReader *br); 46 47 status_t getNextNALUnit( 48 const uint8_t **_data, size_t *_size, 49 const uint8_t **nalStart, size_t *nalSize, 50 bool startCodeFollows = false); 51 52 struct MetaData; 53 sp<MetaData> MakeAVCCodecSpecificData(const sp<ABuffer> &accessUnit); 54 55 bool IsIDR(const sp<ABuffer> &accessUnit); 56 bool IsAVCReferenceFrame(const sp<ABuffer> &accessUnit); 57 58 const char *AVCProfileToString(uint8_t profile); 59 60 sp<MetaData> MakeAACCodecSpecificData( 61 unsigned profile, unsigned sampling_freq_index, 62 unsigned channel_configuration); 63 64 // Given an MPEG4 video VOL-header chunk (starting with 0x00 0x00 0x01 0x2?) 65 // parse it and fill in dimensions, returns true iff successful. 66 bool ExtractDimensionsFromVOLHeader( 67 const uint8_t *data, size_t size, int32_t *width, int32_t *height); 68 69 bool GetMPEGAudioFrameSize( 70 uint32_t header, size_t *frame_size, 71 int *out_sampling_rate = NULL, int *out_channels = NULL, 72 int *out_bitrate = NULL, int *out_num_samples = NULL); 73 74 } // namespace android 75 76 #endif // AVC_UTILS_H_ 77
