QCamera2/HAL/QCameraChannel.cpp

/* Copyright (c) 2012-2013, The Linux Foundataion. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
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*       with the distribution.
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*       contributors may be used to endorse or promote products derived
*       from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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#define LOG_TAG "QCameraChannel"

#include <utils/Errors.h>
#include "QCameraParameters.h"
#include "QCamera2HWI.h"
#include "QCameraChannel.h"

using namespace android;

namespace qcamera {

/*===========================================================================
 * FUNCTION   : QCameraChannel
 *
 * DESCRIPTION: constrcutor of QCameraChannel
 *
 * PARAMETERS :
 *   @cam_handle : camera handle
 *   @cam_ops    : ptr to camera ops table
 *
 * RETURN     : none
 *==========================================================================*/
QCameraChannel::QCameraChannel(uint32_t cam_handle,
                               mm_camera_ops_t *cam_ops)
{
    m_camHandle = cam_handle;
    m_camOps = cam_ops;
    m_bIsActive = false;

    m_handle = 0;
    m_numStreams = 0;
    memset(mStreams, 0, sizeof(mStreams));
}

/*===========================================================================
 * FUNCTION   : QCameraChannel
 *
 * DESCRIPTION: default constrcutor of QCameraChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraChannel::QCameraChannel()
{
    m_camHandle = 0;
    m_camOps = NULL;
    m_bIsActive = false;

    m_handle = 0;
    m_numStreams = 0;
    memset(mStreams, 0, sizeof(mStreams));
}

/*===========================================================================
 * FUNCTION   : ~QCameraChannel
 *
 * DESCRIPTION: destructor of QCameraChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraChannel::~QCameraChannel()
{
    if (m_bIsActive) {
        stop();
    }

    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL) {
            delete mStreams[i];
            mStreams[i] = 0;
        }
    }
    m_numStreams = 0;
    m_camOps->delete_channel(m_camHandle, m_handle);
    m_handle = 0;
}

/*===========================================================================
 * FUNCTION   : init
 *
 * DESCRIPTION: initialization of channel
 *
 * PARAMETERS :
 *   @attr    : channel bundle attribute setting
 *   @dataCB  : data notify callback
 *   @userData: user data ptr
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraChannel::init(mm_camera_channel_attr_t *attr,
                             mm_camera_buf_notify_t dataCB,
                             void *userData)
{
    m_handle = m_camOps->add_channel(m_camHandle,
                                      attr,
                                      dataCB,
                                      userData);
    if (m_handle == 0) {
        ALOGE("%s: Add channel failed", __func__);
        return UNKNOWN_ERROR;
    }
    return NO_ERROR;
}

/*===========================================================================
 * FUNCTION   : addStream
 *
 * DESCRIPTION: add a stream into channel
 *
 * PARAMETERS :
 *   @allocator      : stream related buffer allocator
 *   @streamInfoBuf  : ptr to buf that constains stream info
 *   @minStreamBufNum: number of stream buffers needed
 *   @paddingInfo    : padding information
 *   @stream_cb      : stream data notify callback
 *   @userdata       : user data ptr
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraChannel::addStream(QCameraAllocator &allocator,
                                  QCameraHeapMemory *streamInfoBuf,
                                  uint8_t minStreamBufNum,
                                  cam_padding_info_t *paddingInfo,
                                  stream_cb_routine stream_cb,
                                  void *userdata)
{
    int32_t rc = NO_ERROR;
    if (m_numStreams >= MAX_STREAM_NUM_IN_BUNDLE) {
        ALOGE("%s: stream number (%d) exceeds max limit (%d)",
              __func__, m_numStreams, MAX_STREAM_NUM_IN_BUNDLE);
        return BAD_VALUE;
    }
    QCameraStream *pStream = new QCameraStream(allocator,
                                               m_camHandle,
                                               m_handle,
                                               m_camOps,
                                               paddingInfo);
    if (pStream == NULL) {
        ALOGE("%s: No mem for Stream", __func__);
        return NO_MEMORY;
    }

    rc = pStream->init(streamInfoBuf, minStreamBufNum, stream_cb, userdata);
    if (rc == 0) {
        mStreams[m_numStreams] = pStream;
        m_numStreams++;
    } else {
        delete pStream;
    }
    return rc;
}

/*===========================================================================
 * FUNCTION   : start
 *
 * DESCRIPTION: start channel, which will start all streams belong to this channel
 *
 * PARAMETERS : None
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraChannel::start()
{
    int32_t rc = NO_ERROR;

    if (m_numStreams > 1) {
        // there is more than one stream in the channel
        // we need to notify mctl that all streams in this channel need to be bundled
        cam_bundle_config_t bundleInfo;
        memset(&bundleInfo, 0, sizeof(bundleInfo));
        rc = m_camOps->get_bundle_info(m_camHandle, m_handle, &bundleInfo);
        if (rc != NO_ERROR) {
            ALOGE("%s: get_bundle_info failed", __func__);
            return rc;
        }
        if (bundleInfo.num_of_streams > 1) {
            for (int i = 0; i < bundleInfo.num_of_streams; i++) {
                QCameraStream *pStream = getStreamByServerID(bundleInfo.stream_ids[i]);
                if (pStream != NULL) {
                    if (pStream->isTypeOf(CAM_STREAM_TYPE_METADATA)) {
                        // Skip metadata for reprocess now because PP module cannot handle meta data
                        // May need furthur discussion if Imaginglib need meta data
                        continue;
                    }

                    cam_stream_parm_buffer_t param;
                    memset(&param, 0, sizeof(cam_stream_parm_buffer_t));
                    param.type = CAM_STREAM_PARAM_TYPE_SET_BUNDLE_INFO;
                    param.bundleInfo = bundleInfo;
                    rc = pStream->setParameter(param);
                    if (rc != NO_ERROR) {
                        ALOGE("%s: stream setParameter for set bundle failed", __func__);
                        return rc;
                    }
                }
            }
        }
    }

    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL) {
            mStreams[i]->start();
        }
    }
    rc = m_camOps->start_channel(m_camHandle, m_handle);

    if (rc != NO_ERROR) {
        for (int i = 0; i < m_numStreams; i++) {
            if (mStreams[i] != NULL) {
                mStreams[i]->stop();
            }
        }
    } else {
        m_bIsActive = true;
    }

    return rc;
}

/*===========================================================================
 * FUNCTION   : stop
 *
 * DESCRIPTION: stop a channel, which will stop all streams belong to this channel
 *
 * PARAMETERS : none
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraChannel::stop()
{
    int32_t rc = NO_ERROR;
    rc = m_camOps->stop_channel(m_camHandle, m_handle);

    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL) {
            mStreams[i]->stop();
        }
    }

    m_bIsActive = false;
    return rc;
}

/*===========================================================================
 * FUNCTION   : bufDone
 *
 * DESCRIPTION: return a stream buf back to kernel
 *
 * PARAMETERS :
 *   @recvd_frame  : stream buf frame to be returned
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraChannel::bufDone(mm_camera_super_buf_t *recvd_frame)
{
    int32_t rc = NO_ERROR;
    for (int i = 0; i < recvd_frame->num_bufs; i++) {
         if (recvd_frame->bufs[i] != NULL) {
             for (int j = 0; j < m_numStreams; j++) {
                 if (mStreams[j] != NULL &&
                     mStreams[j]->getMyHandle() == recvd_frame->bufs[i]->stream_id) {
                     rc = mStreams[j]->bufDone(recvd_frame->bufs[i]->buf_idx);
                     break; // break loop j
                 }
             }
         }
    }

    return rc;
}

/*===========================================================================
 * FUNCTION   : processZoomDone
 *
 * DESCRIPTION: process zoom done event
 *
 * PARAMETERS :
 *   @previewWindoe : ptr to preview window ops table, needed to set preview
 *                    crop information
 *   @crop_info     : crop info as a result of zoom operation
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraChannel::processZoomDone(preview_stream_ops_t *previewWindow,
                                        cam_crop_data_t &crop_info)
{
    int32_t rc = NO_ERROR;
    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL) {
            rc = mStreams[i]->processZoomDone(previewWindow, crop_info);
        }
    }
    return rc;
}

/*===========================================================================
 * FUNCTION   : getStreamByHandle
 *
 * DESCRIPTION: return stream object by stream handle
 *
 * PARAMETERS :
 *   @streamHandle : stream handle
 *
 * RETURN     : stream object. NULL if not found
 *==========================================================================*/
QCameraStream *QCameraChannel::getStreamByHandle(uint32_t streamHandle)
{
    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL && mStreams[i]->getMyHandle() == streamHandle) {
            return mStreams[i];
        }
    }
    return NULL;
}

/*===========================================================================
 * FUNCTION   : getStreamByServerID
 *
 * DESCRIPTION: return stream object by stream server ID from daemon
 *
 * PARAMETERS :
 *   @serverID : stream server ID
 *
 * RETURN     : stream object. NULL if not found
 *==========================================================================*/
QCameraStream *QCameraChannel::getStreamByServerID(uint32_t serverID)
{
    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL && mStreams[i]->getMyServerID() == serverID) {
            return mStreams[i];
        }
    }
    return NULL;
}

/*===========================================================================
 * FUNCTION   : getStreamByIndex
 *
 * DESCRIPTION: return stream object by index of streams in the channel
 *
 * PARAMETERS :
 *   @index : index of stream in the channel
 *
 * RETURN     : stream object. NULL if not found
 *==========================================================================*/
QCameraStream *QCameraChannel::getStreamByIndex(uint8_t index)
{
    if (index < m_numStreams) {
        return mStreams[index];
    }
    return NULL;
}

/*===========================================================================
 * FUNCTION   : QCameraPicChannel
 *
 * DESCRIPTION: constructor of QCameraPicChannel
 *
 * PARAMETERS :
 *   @cam_handle : camera handle
 *   @cam_ops    : ptr to camera ops table
 *
 * RETURN     : none
 *==========================================================================*/
QCameraPicChannel::QCameraPicChannel(uint32_t cam_handle,
                                     mm_camera_ops_t *cam_ops) :
    QCameraChannel(cam_handle, cam_ops)
{
}

/*===========================================================================
 * FUNCTION   : QCameraPicChannel
 *
 * DESCRIPTION: default constructor of QCameraPicChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraPicChannel::QCameraPicChannel()
{
}

/*===========================================================================
 * FUNCTION   : ~QCameraPicChannel
 *
 * DESCRIPTION: destructor of QCameraPicChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraPicChannel::~QCameraPicChannel()
{
}

/*===========================================================================
 * FUNCTION   : takePicture
 *
 * DESCRIPTION: send request for queued snapshot frames
 *
 * PARAMETERS :
 *   @num_of_snapshot : number of snapshot frames requested
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraPicChannel::takePicture(uint8_t num_of_snapshot)
{
    int32_t rc = m_camOps->request_super_buf(m_camHandle,
                                             m_handle,
                                             num_of_snapshot);
    return rc;
}

/*===========================================================================
 * FUNCTION   : cancelPicture
 *
 * DESCRIPTION: cancel request for queued snapshot frames
 *
 * PARAMETERS : none
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraPicChannel::cancelPicture()
{
    int32_t rc = m_camOps->cancel_super_buf_request(m_camHandle, m_handle);
    return rc;
}

/*===========================================================================
 * FUNCTION   : QCameraVideoChannel
 *
 * DESCRIPTION: constructor of QCameraVideoChannel
 *
 * PARAMETERS :
 *   @cam_handle : camera handle
 *   @cam_ops    : ptr to camera ops table
 *
 * RETURN     : none
 *==========================================================================*/
QCameraVideoChannel::QCameraVideoChannel(uint32_t cam_handle,
                                         mm_camera_ops_t *cam_ops) :
    QCameraChannel(cam_handle, cam_ops)
{
}

/*===========================================================================
 * FUNCTION   : QCameraVideoChannel
 *
 * DESCRIPTION: default constructor of QCameraVideoChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraVideoChannel::QCameraVideoChannel()
{
}

/*===========================================================================
 * FUNCTION   : ~QCameraVideoChannel
 *
 * DESCRIPTION: destructor of QCameraVideoChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraVideoChannel::~QCameraVideoChannel()
{
}

/*===========================================================================
 * FUNCTION   : releaseFrame
 *
 * DESCRIPTION: return video frame from app
 *
 * PARAMETERS :
 *   @opaque     : ptr to video frame to be returned
 *   @isMetaData : if frame is a metadata or real frame
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraVideoChannel::releaseFrame(const void * opaque, bool isMetaData)
{
    QCameraStream *pVideoStream = NULL;
    for (int i = 0; i < m_numStreams; i++) {
        if (mStreams[i] != NULL && mStreams[i]->isTypeOf(CAM_STREAM_TYPE_VIDEO)) {
            pVideoStream = mStreams[i];
            break;
        }
    }

    if (NULL == pVideoStream) {
        ALOGE("%s: No video stream in the channel", __func__);
        return BAD_VALUE;
    }

    int32_t rc = pVideoStream->bufDone(opaque, isMetaData);
    return rc;
}

/*===========================================================================
 * FUNCTION   : QCameraReprocessChannel
 *
 * DESCRIPTION: constructor of QCameraReprocessChannel
 *
 * PARAMETERS :
 *   @cam_handle : camera handle
 *   @cam_ops    : ptr to camera ops table
 *   @pp_mask    : post-proccess feature mask
 *
 * RETURN     : none
 *==========================================================================*/
QCameraReprocessChannel::QCameraReprocessChannel(uint32_t cam_handle,
                                                 mm_camera_ops_t *cam_ops) :
    QCameraChannel(cam_handle, cam_ops),
    m_pSrcChannel(NULL)
{
    memset(mSrcStreamHandles, 0, sizeof(mSrcStreamHandles));
}

/*===========================================================================
 * FUNCTION   : QCameraReprocessChannel
 *
 * DESCRIPTION: default constructor of QCameraReprocessChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraReprocessChannel::QCameraReprocessChannel() :
    m_pSrcChannel(NULL)
{
}

/*===========================================================================
 * FUNCTION   : ~QCameraReprocessChannel
 *
 * DESCRIPTION: destructor of QCameraReprocessChannel
 *
 * PARAMETERS : none
 *
 * RETURN     : none
 *==========================================================================*/
QCameraReprocessChannel::~QCameraReprocessChannel()
{
}

/*===========================================================================
 * FUNCTION   : addReprocStreamsFromSource
 *
 * DESCRIPTION: add reprocess streams from input source channel
 *
 * PARAMETERS :
 *   @allocator      : stream related buffer allocator
 *   @config         : pp feature configuration
 *   @pSrcChannel    : ptr to input source channel that needs reprocess
 *   @minStreamBufNum: number of stream buffers needed
 *   @paddingInfo    : padding information
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraReprocessChannel::addReprocStreamsFromSource(QCameraAllocator& allocator,
                                                            cam_pp_feature_config_t &config,
                                                            QCameraChannel *pSrcChannel,
                                                            uint8_t minStreamBufNum,
                                                            cam_padding_info_t *paddingInfo)
{
    int32_t rc = 0;
    QCameraStream *pStream = NULL;
    QCameraHeapMemory *pStreamInfoBuf = NULL;
    cam_stream_info_t *streamInfo = NULL;

    memset(mSrcStreamHandles, 0, sizeof(mSrcStreamHandles));

    for (int i = 0; i < pSrcChannel->getNumOfStreams(); i++) {
        pStream = pSrcChannel->getStreamByIndex(i);
        if (pStream != NULL) {
            if (pStream->isTypeOf(CAM_STREAM_TYPE_METADATA)) {
                // Skip metadata for reprocess now because PP module cannot handle meta data
                // May need furthur discussion if Imaginglib need meta data
                continue;
            }

            pStreamInfoBuf = allocator.allocateStreamInfoBuf(CAM_STREAM_TYPE_OFFLINE_PROC);
            if (pStreamInfoBuf == NULL) {
                ALOGE("%s: no mem for stream info buf", __func__);
                rc = NO_MEMORY;
                break;
            }

            streamInfo = (cam_stream_info_t *)pStreamInfoBuf->getPtr(0);
            memset(streamInfo, 0, sizeof(cam_stream_info_t));
            streamInfo->stream_type = CAM_STREAM_TYPE_OFFLINE_PROC;
            rc = pStream->getFormat(streamInfo->fmt);
            rc = pStream->getFrameDimension(streamInfo->dim);
            streamInfo->streaming_mode = CAM_STREAMING_MODE_BURST;
            streamInfo->num_of_burst = minStreamBufNum;

            streamInfo->reprocess_config.pp_type = CAM_ONLINE_REPROCESS_TYPE;
            streamInfo->reprocess_config.online.input_stream_id = pStream->getMyServerID();
            streamInfo->reprocess_config.online.input_stream_type = pStream->getMyType();
            streamInfo->reprocess_config.pp_feature_config = config;

            if (!(pStream->isTypeOf(CAM_STREAM_TYPE_SNAPSHOT) ||
                pStream->isOrignalTypeOf(CAM_STREAM_TYPE_SNAPSHOT))) {
                streamInfo->reprocess_config.pp_feature_config.feature_mask &= ~CAM_QCOM_FEATURE_CAC;
            }
            if (streamInfo->reprocess_config.pp_feature_config.feature_mask & CAM_QCOM_FEATURE_ROTATION) {
                if (streamInfo->reprocess_config.pp_feature_config.rotation == ROTATE_90 ||
                    streamInfo->reprocess_config.pp_feature_config.rotation == ROTATE_270) {
                    // rotated by 90 or 270, need to switch width and height
                    int32_t temp = streamInfo->dim.height;
                    streamInfo->dim.height = streamInfo->dim.width;
                    streamInfo->dim.width = temp;
                }
            }

            // save source stream handler
            mSrcStreamHandles[m_numStreams] = pStream->getMyHandle();

            // add reprocess stream
            rc = addStream(allocator,
                           pStreamInfoBuf, minStreamBufNum,
                           paddingInfo,
                           NULL, NULL);
            if (rc != NO_ERROR) {
                ALOGE("%s: add reprocess stream failed, ret = %d", __func__, rc);
                break;
            }
        }
    }

    if (rc == NO_ERROR) {
        m_pSrcChannel = pSrcChannel;
    }
    return rc;
}

/*===========================================================================
 * FUNCTION   : getStreamBySrouceHandle
 *
 * DESCRIPTION: find reprocess stream by its source stream handle
 *
 * PARAMETERS :
 *   @srcHandle : source stream handle
 *
 * RETURN     : ptr to reprocess stream if found. NULL if not found
 *==========================================================================*/
QCameraStream * QCameraReprocessChannel::getStreamBySrouceHandle(uint32_t srcHandle)
{
    QCameraStream *pStream = NULL;

    for (int i = 0; i < m_numStreams; i++) {
        if (mSrcStreamHandles[i] == srcHandle) {
            pStream = mStreams[i];
            break;
        }
    }

    return pStream;
}

/*===========================================================================
 * FUNCTION   : doReprocess
 *
 * DESCRIPTION: request to do a reprocess on the frame
 *
 * PARAMETERS :
 *   @frame   : frame to be performed a reprocess
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraReprocessChannel::doReprocess(mm_camera_super_buf_t *frame)
{
    int32_t rc = 0;
    if (m_numStreams < 1) {
        ALOGE("%s: No reprocess stream is created", __func__);
        return -1;
    }
    if (m_pSrcChannel == NULL) {
        ALOGE("%s: No source channel for reprocess", __func__);
        return -1;
    }

    // find meta data stream and index of meta data frame in the superbuf
    QCameraStream *pMetaStream = NULL;
    uint8_t meta_buf_index = 0;
    for (int i = 0; i < frame->num_bufs; i++) {
        QCameraStream *pStream = m_pSrcChannel->getStreamByHandle(frame->bufs[i]->stream_id);
        if (pStream != NULL) {
            if (pStream->isTypeOf(CAM_STREAM_TYPE_METADATA)) {
                meta_buf_index = frame->bufs[i]->buf_idx;
                pMetaStream = pStream;
                break;
            }
        }
    }

    for (int i = 0; i < frame->num_bufs; i++) {
        QCameraStream *pStream = getStreamBySrouceHandle(frame->bufs[i]->stream_id);
        if (pStream != NULL) {
            if (pStream->isTypeOf(CAM_STREAM_TYPE_METADATA)) {
                // Skip metadata for reprocess now because PP module cannot handle meta data
                // May need furthur discussion if Imaginglib need meta data
                continue;
            }

            cam_stream_parm_buffer_t param;
            memset(&param, 0, sizeof(cam_stream_parm_buffer_t));
            param.type = CAM_STREAM_PARAM_TYPE_DO_REPROCESS;
            param.reprocess.buf_index = frame->bufs[i]->buf_idx;
            param.reprocess.frame_idx = frame->bufs[i]->frame_idx;
            if (pMetaStream != NULL) {
                // we have meta data frame bundled, sent together with reprocess frame
                param.reprocess.meta_present = 1;
                param.reprocess.meta_stream_handle = pMetaStream->getMyServerID();
                param.reprocess.meta_buf_index = meta_buf_index;
            }
            rc = pStream->setParameter(param);
            if (rc != NO_ERROR) {
                ALOGE("%s: stream setParameter for reprocess failed", __func__);
                break;
            }
        }
    }
    return rc;
}

/*===========================================================================
 * FUNCTION   : doReprocess
 *
 * DESCRIPTION: request to do a reprocess on the frame
 *
 * PARAMETERS :
 *   @buf_fd     : fd to the input buffer that needs reprocess
 *   @buf_lenght : length of the input buffer
 *   @ret_val    : result of reprocess.
 *                 Example: Could be faceID in case of register face image.
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int32_t QCameraReprocessChannel::doReprocess(int buf_fd,
                                             uint32_t buf_length,
                                             int32_t &ret_val)
{
    int32_t rc = 0;
    if (m_numStreams < 1) {
        ALOGE("%s: No reprocess stream is created", __func__);
        return -1;
    }

    uint32_t buf_idx = 0;
    for (int i = 0; i < m_numStreams; i++) {
        rc = mStreams[i]->mapBuf(CAM_MAPPING_BUF_TYPE_OFFLINE_INPUT_BUF,
                                 buf_idx, -1,
                                 buf_fd, buf_length);

        if (rc == NO_ERROR) {
            cam_stream_parm_buffer_t param;
            memset(&param, 0, sizeof(cam_stream_parm_buffer_t));
            param.type = CAM_STREAM_PARAM_TYPE_DO_REPROCESS;
            param.reprocess.buf_index = buf_idx;
            rc = mStreams[i]->setParameter(param);
            if (rc == NO_ERROR) {
                ret_val = param.reprocess.ret_val;
            }
            mStreams[i]->unmapBuf(CAM_MAPPING_BUF_TYPE_OFFLINE_INPUT_BUF,
                                  buf_idx, -1);
        }
    }
    return rc;
}

}; // namespace qcamera