Adds VPX encoding support for stagefright.

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES := \

        SoftVPXEncoder.cpp

LOCAL_C_INCLUDES := \

        $(TOP)/external/libvpx/libvpx \

        $(TOP)/external/openssl/include \

        $(TOP)/external/libvpx/libvpx/vpx_codec \

        $(TOP)/external/libvpx/libvpx/vpx_ports \

        frameworks/av/media/libstagefright/include \

        frameworks/native/include/media/openmax \

LOCAL_STATIC_LIBRARIES := \

        libvpx

LOCAL_SHARED_LIBRARIES := \

        libstagefright libstagefright_omx libstagefright_foundation libutils \

LOCAL_MODULE := libstagefright_soft_vpxenc

LOCAL_MODULE_TAGS := optional

include $(BUILD_SHARED_LIBRARY)

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/*

 * Copyright (C) 2013 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.

 */

#ifndef SOFT_VPX_ENCODER_H_

#define SOFT_VPX_ENCODER_H_

#include "SimpleSoftOMXComponent.h"

#include <OMX_VideoExt.h>

#include <OMX_IndexExt.h>

#include "vpx/vpx_encoder.h"

#include "vpx/vpx_codec.h"

#include "vpx/vp8cx.h"

namespace android {

// Exposes a vpx encoder as an OMX Component

//

// Boilerplate for callback bindings are taken care

// by the base class SimpleSoftOMXComponent and its

// parent SoftOMXComponent.

//

// Only following encoder settings are available

//    - target bitrate

//    - rate control (constant / variable)

//    - frame rate

//    - error resilience

//    - token partitioning

//    - reconstruction & loop filters (g_profile)

//

// Only following color formats are recognized

//    - YUV420Planar

//    - YUV420SemiPlanar

//    - AndroidOpaque

//

// Following settings are not configurable by the client

//    - encoding deadline is realtime

//    - multithreaded encoding utilizes a number of threads equal

// to online cpu's available

//    - the algorithm interface for encoder is vp8

//    - fractional bits of frame rate is discarded

//    - OMX timestamps are in microseconds, therefore

// encoder timebase is fixed to 1/1000000

class SoftVPXEncoder : public SimpleSoftOMXComponent {

 public:

    SoftVPXEncoder(const char *name,

                   const OMX_CALLBACKTYPE *callbacks,

                   OMX_PTR appData,

                   OMX_COMPONENTTYPE **component);

 protected:

    virtual ~SoftVPXEncoder();

    // Returns current values for requested OMX

    // parameters

    virtual OMX_ERRORTYPE internalGetParameter(

            OMX_INDEXTYPE index, OMX_PTR param);

    // Validates, extracts and stores relevant OMX

    // parameters

    virtual OMX_ERRORTYPE internalSetParameter(

            OMX_INDEXTYPE index, const OMX_PTR param);

    // OMX callback when buffers available

    // Note that both an input and output buffer

    // is expected to be available to carry out

    // encoding of the frame

    virtual void onQueueFilled(OMX_U32 portIndex);

 private:

    // number of buffers allocated per port

    static const uint32_t kNumBuffers = 4;

    // OMX port indexes that refer to input and

    // output ports respectively

    static const uint32_t kInputPortIndex = 0;

    static const uint32_t kOutputPortIndex = 1;

    // Byte-alignment required for buffers

    static const uint32_t kInputBufferAlignment = 1;

    static const uint32_t kOutputBufferAlignment = 2;

    // Max value supported for DCT partitions

    static const uint32_t kMaxDCTPartitions = 3;

    // Number of supported input color formats

    static const uint32_t kNumberOfSupportedColorFormats = 3;

    // vpx specific opaque data structure that

    // stores encoder state

    vpx_codec_ctx_t* mCodecContext;

    // vpx specific data structure that

    // stores encoder configuration

    vpx_codec_enc_cfg_t* mCodecConfiguration;

    // vpx specific read-only data structure

    // that specifies algorithm interface (e.g. vp8)

    vpx_codec_iface_t* mCodecInterface;

    // Width of the input frames

    int32_t mWidth;

    // Height of the input frames

    int32_t mHeight;

    // Target bitrate set for the encoder, in bits per second.

    int32_t mBitrate;

    // Bitrate control mode, either constant or variable

    vpx_rc_mode mBitrateControlMode;

    // Frame duration is the reciprocal of framerate, denoted

    // in microseconds

    uint64_t mFrameDurationUs;

    // vp8 specific configuration parameter

    // that enables token partitioning of

    // the stream into substreams

    int32_t mDCTPartitions;

    // Parameter that denotes whether error resilience

    // is enabled in encoder

    OMX_BOOL mErrorResilience;

    // Color format for the input port

    OMX_COLOR_FORMATTYPE mColorFormat;

    // Encoder profile corresponding to OMX level parameter

    //

    // The inconsistency in the naming is caused by

    // OMX spec referring vpx profiles (g_profile)

    // as "levels" whereas using the name "profile" for

    // something else.

    OMX_VIDEO_VP8LEVELTYPE mLevel;

    // Conversion buffer is needed to convert semi

    // planar yuv420 to planar format

    // It is only allocated if input format is

    // indeed YUV420SemiPlanar.

    uint8_t* mConversionBuffer;

    // Initializes input and output OMX ports with sensible

    // default values.

    void initPorts();

    // Initializes vpx encoder with available settings.

    status_t initEncoder();

    // Releases vpx encoder instance, with it's associated

    // data structures.

    //

    // Unless called earlier, this is handled by the

    // dtor.

    status_t releaseEncoder();

    // Handles port changes with respect to color formats

    OMX_ERRORTYPE internalSetFormatParams(

        const OMX_VIDEO_PARAM_PORTFORMATTYPE* format);

    // Verifies the component role tried to be set to this OMX component is

    // strictly video_encoder.vpx

    OMX_ERRORTYPE internalSetRoleParams(

        const OMX_PARAM_COMPONENTROLETYPE* role);

    // Updates bitrate to reflect port settings.

    OMX_ERRORTYPE internalSetBitrateParams(

        const OMX_VIDEO_PARAM_BITRATETYPE* bitrate);

    // Handles port definition changes.

    OMX_ERRORTYPE internalSetPortParams(

        const OMX_PARAM_PORTDEFINITIONTYPE* port);

    // Handles vp8 specific parameters.

    OMX_ERRORTYPE internalSetVp8Params(

        const OMX_VIDEO_PARAM_VP8TYPE* vp8Params);

    // Updates encoder profile

    OMX_ERRORTYPE internalSetProfileLevel(

        const OMX_VIDEO_PARAM_PROFILELEVELTYPE* profileAndLevel);

    DISALLOW_EVIL_CONSTRUCTORS(SoftVPXEncoder);

};

}  // namespace android

#endif  // SOFT_VPX_ENCODER_H_