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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      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
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 /**
     19     @file omx_mpeg4_component.h
     20     OpenMax decoder_component component.
     21 
     22 */
     23 
     24 #ifndef OMX_MPEG4_COMPONENT_H_INCLUDED
     25 #define OMX_MPEG4_COMPONENT_H_INCLUDED
     26 
     27 #ifndef PV_OMXCOMPONENT_H_INCLUDED
     28 #include "pv_omxcomponent.h"
     29 #endif
     30 
     31 #ifndef MPEG4_DEC_H_INCLUDED
     32 #include "mpeg4_dec.h"
     33 #endif
     34 
     35 
     36 #define INPUT_BUFFER_SIZE_MP4 16000
     37 // qcif size - 176*144*3/2
     38 #define OUTPUT_BUFFER_SIZE_MP4 38016
     39 
     40 #define NUMBER_INPUT_BUFFER_MP4  10
     41 #define NUMBER_OUTPUT_BUFFER_MP4  2
     42 
     43 #define MINIMUM_H263_SHORT_HEADER_SIZE 12
     44 /**
     45  * The structure for port Type.
     46  */
     47 enum
     48 {
     49     MODE_H263 = 0,
     50     MODE_MPEG4
     51 };
     52 
     53 
     54 class OpenmaxMpeg4AO : public OmxComponentVideo
     55 {
     56     public:
     57 
     58         OpenmaxMpeg4AO();
     59         ~OpenmaxMpeg4AO();
     60 
     61         OMX_ERRORTYPE ConstructComponent(OMX_PTR pAppData, OMX_PTR pProxy);
     62         OMX_ERRORTYPE DestroyComponent();
     63 
     64         OMX_ERRORTYPE ComponentInit();
     65         OMX_ERRORTYPE ComponentDeInit();
     66 
     67         static void ComponentGetRolesOfComponent(OMX_STRING* aRoleString);
     68 
     69         void SetDecoderMode(int);
     70         void ComponentBufferMgmtWithoutMarker();
     71         void ProcessData();
     72         void DecodeWithoutMarker();
     73         void DecodeWithMarker();
     74 
     75         OMX_ERRORTYPE GetConfig(
     76             OMX_IN  OMX_HANDLETYPE hComponent,
     77             OMX_IN  OMX_INDEXTYPE nIndex,
     78             OMX_INOUT OMX_PTR pComponentConfigStructure);
     79 
     80         OMX_ERRORTYPE ReAllocatePartialAssemblyBuffers(OMX_BUFFERHEADERTYPE* aInputBufferHdr);
     81 
     82     private:
     83 
     84         OMX_BOOL DecodeH263Header(OMX_U8* aInputBuffer, OMX_U32* aBufferSize);
     85 
     86         void ReadBits(OMX_U8* aStream, uint8 aNumBits, uint32* aOutData);
     87 
     88         OMX_BOOL                iUseExtTimestamp;
     89         Mpeg4Decoder_OMX* ipMpegDecoderObject;
     90         OMX_S32 iDecMode;
     91 
     92         //Parameters required for H.263 source format parsing
     93         OMX_U32 iH263DataBitPos;
     94         OMX_U32 iH263BitPos;
     95         OMX_U32 iH263BitBuf;
     96 };
     97 
     98 
     99 
    100 
    101 #endif // OMX_MPEG4_COMPONENT_H_INCLUDED
    102