/*
 * Copyright (C) 2009 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.
 */

//#define LOG_NDEBUG 0
#define LOG_TAG "StagefrightRecorder"
#include <utils/Log.h>

#include "StagefrightRecorder.h"

#include <binder/IPCThreadState.h>
#include <media/stagefright/AudioSource.h>
#include <media/stagefright/AMRWriter.h>
#include <media/stagefright/CameraSource.h>
#include <media/stagefright/MPEG2TSWriter.h>
#include <media/stagefright/MPEG4Writer.h>
#include <media/stagefright/MediaDebug.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MetaData.h>
#include <media/stagefright/OMXClient.h>
#include <media/stagefright/OMXCodec.h>
#include <media/MediaProfiles.h>
#include <camera/ICamera.h>
#include <camera/Camera.h>
#include <camera/CameraParameters.h>
#include <surfaceflinger/ISurface.h>
#include <utils/Errors.h>
#include <sys/types.h>
#include <unistd.h>
#include <ctype.h>

#include "ARTPWriter.h"

namespace android {

StagefrightRecorder::StagefrightRecorder()
    : mWriter(NULL),
      mOutputFd(-1) {

    LOGV("Constructor");
    reset();
}

StagefrightRecorder::~StagefrightRecorder() {
    LOGV("Destructor");
    stop();
}

status_t StagefrightRecorder::init() {
    LOGV("init");
    return OK;
}

status_t StagefrightRecorder::setAudioSource(audio_source as) {
    LOGV("setAudioSource: %d", as);
    if (as < AUDIO_SOURCE_DEFAULT ||
        as >= AUDIO_SOURCE_LIST_END) {
        LOGE("Invalid audio source: %d", as);
        return BAD_VALUE;
    }

    if (as == AUDIO_SOURCE_DEFAULT) {
        mAudioSource = AUDIO_SOURCE_MIC;
    } else {
        mAudioSource = as;
    }

    return OK;
}

status_t StagefrightRecorder::setVideoSource(video_source vs) {
    LOGV("setVideoSource: %d", vs);
    if (vs < VIDEO_SOURCE_DEFAULT ||
        vs >= VIDEO_SOURCE_LIST_END) {
        LOGE("Invalid video source: %d", vs);
        return BAD_VALUE;
    }

    if (vs == VIDEO_SOURCE_DEFAULT) {
        mVideoSource = VIDEO_SOURCE_CAMERA;
    } else {
        mVideoSource = vs;
    }

    return OK;
}

status_t StagefrightRecorder::setOutputFormat(output_format of) {
    LOGV("setOutputFormat: %d", of);
    if (of < OUTPUT_FORMAT_DEFAULT ||
        of >= OUTPUT_FORMAT_LIST_END) {
        LOGE("Invalid output format: %d", of);
        return BAD_VALUE;
    }

    if (of == OUTPUT_FORMAT_DEFAULT) {
        mOutputFormat = OUTPUT_FORMAT_THREE_GPP;
    } else {
        mOutputFormat = of;
    }

    return OK;
}

status_t StagefrightRecorder::setAudioEncoder(audio_encoder ae) {
    LOGV("setAudioEncoder: %d", ae);
    if (ae < AUDIO_ENCODER_DEFAULT ||
        ae >= AUDIO_ENCODER_LIST_END) {
        LOGE("Invalid audio encoder: %d", ae);
        return BAD_VALUE;
    }

    if (ae == AUDIO_ENCODER_DEFAULT) {
        mAudioEncoder = AUDIO_ENCODER_AMR_NB;
    } else {
        mAudioEncoder = ae;
    }

    return OK;
}

status_t StagefrightRecorder::setVideoEncoder(video_encoder ve) {
    LOGV("setVideoEncoder: %d", ve);
    if (ve < VIDEO_ENCODER_DEFAULT ||
        ve >= VIDEO_ENCODER_LIST_END) {
        LOGE("Invalid video encoder: %d", ve);
        return BAD_VALUE;
    }

    if (ve == VIDEO_ENCODER_DEFAULT) {
        mVideoEncoder = VIDEO_ENCODER_H263;
    } else {
        mVideoEncoder = ve;
    }

    return OK;
}

status_t StagefrightRecorder::setVideoSize(int width, int height) {
    LOGV("setVideoSize: %dx%d", width, height);
    if (width <= 0 || height <= 0) {
        LOGE("Invalid video size: %dx%d", width, height);
        return BAD_VALUE;
    }

    // Additional check on the dimension will be performed later
    mVideoWidth = width;
    mVideoHeight = height;

    return OK;
}

status_t StagefrightRecorder::setVideoFrameRate(int frames_per_second) {
    LOGV("setVideoFrameRate: %d", frames_per_second);
    if (frames_per_second <= 0 || frames_per_second > 30) {
        LOGE("Invalid video frame rate: %d", frames_per_second);
        return BAD_VALUE;
    }

    // Additional check on the frame rate will be performed later
    mFrameRate = frames_per_second;

    return OK;
}

status_t StagefrightRecorder::setCamera(const sp<ICamera> &camera) {
    LOGV("setCamera");
    if (camera == 0) {
        LOGE("camera is NULL");
        return BAD_VALUE;
    }

    int64_t token = IPCThreadState::self()->clearCallingIdentity();
    mFlags &= ~FLAGS_HOT_CAMERA;
    mCamera = Camera::create(camera);
    if (mCamera == 0) {
        LOGE("Unable to connect to camera");
        IPCThreadState::self()->restoreCallingIdentity(token);
        return -EBUSY;
    }

    LOGV("Connected to camera");
    if (mCamera->previewEnabled()) {
        LOGV("camera is hot");
        mFlags |= FLAGS_HOT_CAMERA;
    }
    IPCThreadState::self()->restoreCallingIdentity(token);

    return OK;
}

status_t StagefrightRecorder::setPreviewSurface(const sp<ISurface> &surface) {
    LOGV("setPreviewSurface: %p", surface.get());
    mPreviewSurface = surface;

    return OK;
}

status_t StagefrightRecorder::setOutputFile(const char *path) {
    LOGE("setOutputFile(const char*) must not be called");
    // We don't actually support this at all, as the media_server process
    // no longer has permissions to create files.

    return -EPERM;
}

status_t StagefrightRecorder::setOutputFile(int fd, int64_t offset, int64_t length) {
    LOGV("setOutputFile: %d, %lld, %lld", fd, offset, length);
    // These don't make any sense, do they?
    CHECK_EQ(offset, 0);
    CHECK_EQ(length, 0);

    if (fd < 0) {
        LOGE("Invalid file descriptor: %d", fd);
        return -EBADF;
    }

    if (mOutputFd >= 0) {
        ::close(mOutputFd);
    }
    mOutputFd = dup(fd);

    return OK;
}

// Attempt to parse an int64 literal optionally surrounded by whitespace,
// returns true on success, false otherwise.
static bool safe_strtoi64(const char *s, int64_t *val) {
    char *end;
    *val = strtoll(s, &end, 10);

    if (end == s || errno == ERANGE) {
        return false;
    }

    // Skip trailing whitespace
    while (isspace(*end)) {
        ++end;
    }

    // For a successful return, the string must contain nothing but a valid
    // int64 literal optionally surrounded by whitespace.

    return *end == '\0';
}

// Return true if the value is in [0, 0x007FFFFFFF]
static bool safe_strtoi32(const char *s, int32_t *val) {
    int64_t temp;
    if (safe_strtoi64(s, &temp)) {
        if (temp >= 0 && temp <= 0x007FFFFFFF) {
            *val = static_cast<int32_t>(temp);
            return true;
        }
    }
    return false;
}

// Trim both leading and trailing whitespace from the given string.
static void TrimString(String8 *s) {
    size_t num_bytes = s->bytes();
    const char *data = s->string();

    size_t leading_space = 0;
    while (leading_space < num_bytes && isspace(data[leading_space])) {
        ++leading_space;
    }

    size_t i = num_bytes;
    while (i > leading_space && isspace(data[i - 1])) {
        --i;
    }

    s->setTo(String8(&data[leading_space], i - leading_space));
}

status_t StagefrightRecorder::setParamAudioSamplingRate(int32_t sampleRate) {
    LOGV("setParamAudioSamplingRate: %d", sampleRate);
    if (sampleRate <= 0) {
        LOGE("Invalid audio sampling rate: %d", sampleRate);
        return BAD_VALUE;
    }

    // Additional check on the sample rate will be performed later.
    mSampleRate = sampleRate;
    return OK;
}

status_t StagefrightRecorder::setParamAudioNumberOfChannels(int32_t channels) {
    LOGV("setParamAudioNumberOfChannels: %d", channels);
    if (channels <= 0 || channels >= 3) {
        LOGE("Invalid number of audio channels: %d", channels);
        return BAD_VALUE;
    }

    // Additional check on the number of channels will be performed later.
    mAudioChannels = channels;
    return OK;
}

status_t StagefrightRecorder::setParamAudioEncodingBitRate(int32_t bitRate) {
    LOGV("setParamAudioEncodingBitRate: %d", bitRate);
    if (bitRate <= 0) {
        LOGE("Invalid audio encoding bit rate: %d", bitRate);
        return BAD_VALUE;
    }

    // The target bit rate may not be exactly the same as the requested.
    // It depends on many factors, such as rate control, and the bit rate
    // range that a specific encoder supports. The mismatch between the
    // the target and requested bit rate will NOT be treated as an error.
    mAudioBitRate = bitRate;
    return OK;
}

status_t StagefrightRecorder::setParamVideoEncodingBitRate(int32_t bitRate) {
    LOGV("setParamVideoEncodingBitRate: %d", bitRate);
    if (bitRate <= 0) {
        LOGE("Invalid video encoding bit rate: %d", bitRate);
        return BAD_VALUE;
    }

    // The target bit rate may not be exactly the same as the requested.
    // It depends on many factors, such as rate control, and the bit rate
    // range that a specific encoder supports. The mismatch between the
    // the target and requested bit rate will NOT be treated as an error.
    mVideoBitRate = bitRate;
    return OK;
}

// Always rotate clockwise, and only support 0, 90, 180 and 270 for now.
status_t StagefrightRecorder::setParamVideoRotation(int32_t degrees) {
    LOGV("setParamVideoRotation: %d", degrees);
    if (degrees < 0 || degrees % 90 != 0) {
        LOGE("Unsupported video rotation angle: %d", degrees);
        return BAD_VALUE;
    }
    mRotationDegrees = degrees % 360;
    return OK;
}

status_t StagefrightRecorder::setParamMaxFileDurationUs(int64_t timeUs) {
    LOGV("setParamMaxFileDurationUs: %lld us", timeUs);
    if (timeUs <= 0) {
        LOGW("Max file duration is not positive: %lld us. Disabling duration limit.", timeUs);
        timeUs = 0; // Disable the duration limit for zero or negative values.
    } else if (timeUs <= 100000LL) {  // XXX: 100 milli-seconds
        LOGE("Max file duration is too short: %lld us", timeUs);
        return BAD_VALUE;
    }

    mMaxFileDurationUs = timeUs;
    return OK;
}

status_t StagefrightRecorder::setParamMaxFileSizeBytes(int64_t bytes) {
    LOGV("setParamMaxFileSizeBytes: %lld bytes", bytes);
    if (bytes <= 1024) {  // XXX: 1 kB
        LOGE("Max file size is too small: %lld bytes", bytes);
        return BAD_VALUE;
    }
    mMaxFileSizeBytes = bytes;
    return OK;
}

status_t StagefrightRecorder::setParamInterleaveDuration(int32_t durationUs) {
    LOGV("setParamInterleaveDuration: %d", durationUs);
    if (durationUs <= 500000) {           //  500 ms
        // If interleave duration is too small, it is very inefficient to do
        // interleaving since the metadata overhead will count for a significant
        // portion of the saved contents
        LOGE("Audio/video interleave duration is too small: %d us", durationUs);
        return BAD_VALUE;
    } else if (durationUs >= 10000000) {  // 10 seconds
        // If interleaving duration is too large, it can cause the recording
        // session to use too much memory since we have to save the output
        // data before we write them out
        LOGE("Audio/video interleave duration is too large: %d us", durationUs);
        return BAD_VALUE;
    }
    mInterleaveDurationUs = durationUs;
    return OK;
}

// If seconds <  0, only the first frame is I frame, and rest are all P frames
// If seconds == 0, all frames are encoded as I frames. No P frames
// If seconds >  0, it is the time spacing (seconds) between 2 neighboring I frames
status_t StagefrightRecorder::setParamVideoIFramesInterval(int32_t seconds) {
    LOGV("setParamVideoIFramesInterval: %d seconds", seconds);
    mIFramesIntervalSec = seconds;
    return OK;
}

status_t StagefrightRecorder::setParam64BitFileOffset(bool use64Bit) {
    LOGV("setParam64BitFileOffset: %s",
        use64Bit? "use 64 bit file offset": "use 32 bit file offset");
    mUse64BitFileOffset = use64Bit;
    return OK;
}

status_t StagefrightRecorder::setParamVideoCameraId(int32_t cameraId) {
    LOGV("setParamVideoCameraId: %d", cameraId);
    if (cameraId < 0) {
        return BAD_VALUE;
    }
    mCameraId = cameraId;
    return OK;
}

status_t StagefrightRecorder::setParamTrackTimeStatus(int64_t timeDurationUs) {
    LOGV("setParamTrackTimeStatus: %lld", timeDurationUs);
    if (timeDurationUs < 20000) {  // Infeasible if shorter than 20 ms?
        LOGE("Tracking time duration too short: %lld us", timeDurationUs);
        return BAD_VALUE;
    }
    mTrackEveryTimeDurationUs = timeDurationUs;
    return OK;
}

status_t StagefrightRecorder::setParamVideoEncoderProfile(int32_t profile) {
    LOGV("setParamVideoEncoderProfile: %d", profile);

    // Additional check will be done later when we load the encoder.
    // For now, we are accepting values defined in OpenMAX IL.
    mVideoEncoderProfile = profile;
    return OK;
}

status_t StagefrightRecorder::setParamVideoEncoderLevel(int32_t level) {
    LOGV("setParamVideoEncoderLevel: %d", level);

    // Additional check will be done later when we load the encoder.
    // For now, we are accepting values defined in OpenMAX IL.
    mVideoEncoderLevel = level;
    return OK;
}

status_t StagefrightRecorder::setParamMovieTimeScale(int32_t timeScale) {
    LOGV("setParamMovieTimeScale: %d", timeScale);

    // The range is set to be the same as the audio's time scale range
    // since audio's time scale has a wider range.
    if (timeScale < 600 || timeScale > 96000) {
        LOGE("Time scale (%d) for movie is out of range [600, 96000]", timeScale);
        return BAD_VALUE;
    }
    mMovieTimeScale = timeScale;
    return OK;
}

status_t StagefrightRecorder::setParamVideoTimeScale(int32_t timeScale) {
    LOGV("setParamVideoTimeScale: %d", timeScale);

    // 60000 is chosen to make sure that each video frame from a 60-fps
    // video has 1000 ticks.
    if (timeScale < 600 || timeScale > 60000) {
        LOGE("Time scale (%d) for video is out of range [600, 60000]", timeScale);
        return BAD_VALUE;
    }
    mVideoTimeScale = timeScale;
    return OK;
}

status_t StagefrightRecorder::setParamAudioTimeScale(int32_t timeScale) {
    LOGV("setParamAudioTimeScale: %d", timeScale);

    // 96000 Hz is the highest sampling rate support in AAC.
    if (timeScale < 600 || timeScale > 96000) {
        LOGE("Time scale (%d) for audio is out of range [600, 96000]", timeScale);
        return BAD_VALUE;
    }
    mAudioTimeScale = timeScale;
    return OK;
}

status_t StagefrightRecorder::setParameter(
        const String8 &key, const String8 &value) {
    LOGV("setParameter: key (%s) => value (%s)", key.string(), value.string());
    if (key == "max-duration") {
        int64_t max_duration_ms;
        if (safe_strtoi64(value.string(), &max_duration_ms)) {
            return setParamMaxFileDurationUs(1000LL * max_duration_ms);
        }
    } else if (key == "max-filesize") {
        int64_t max_filesize_bytes;
        if (safe_strtoi64(value.string(), &max_filesize_bytes)) {
            return setParamMaxFileSizeBytes(max_filesize_bytes);
        }
    } else if (key == "interleave-duration-us") {
        int32_t durationUs;
        if (safe_strtoi32(value.string(), &durationUs)) {
            return setParamInterleaveDuration(durationUs);
        }
    } else if (key == "param-movie-time-scale") {
        int32_t timeScale;
        if (safe_strtoi32(value.string(), &timeScale)) {
            return setParamMovieTimeScale(timeScale);
        }
    } else if (key == "param-use-64bit-offset") {
        int32_t use64BitOffset;
        if (safe_strtoi32(value.string(), &use64BitOffset)) {
            return setParam64BitFileOffset(use64BitOffset != 0);
        }
    } else if (key == "param-track-time-status") {
        int64_t timeDurationUs;
        if (safe_strtoi64(value.string(), &timeDurationUs)) {
            return setParamTrackTimeStatus(timeDurationUs);
        }
    } else if (key == "audio-param-sampling-rate") {
        int32_t sampling_rate;
        if (safe_strtoi32(value.string(), &sampling_rate)) {
            return setParamAudioSamplingRate(sampling_rate);
        }
    } else if (key == "audio-param-number-of-channels") {
        int32_t number_of_channels;
        if (safe_strtoi32(value.string(), &number_of_channels)) {
            return setParamAudioNumberOfChannels(number_of_channels);
        }
    } else if (key == "audio-param-encoding-bitrate") {
        int32_t audio_bitrate;
        if (safe_strtoi32(value.string(), &audio_bitrate)) {
            return setParamAudioEncodingBitRate(audio_bitrate);
        }
    } else if (key == "audio-param-time-scale") {
        int32_t timeScale;
        if (safe_strtoi32(value.string(), &timeScale)) {
            return setParamAudioTimeScale(timeScale);
        }
    } else if (key == "video-param-encoding-bitrate") {
        int32_t video_bitrate;
        if (safe_strtoi32(value.string(), &video_bitrate)) {
            return setParamVideoEncodingBitRate(video_bitrate);
        }
    } else if (key == "video-param-rotation-angle-degrees") {
        int32_t degrees;
        if (safe_strtoi32(value.string(), &degrees)) {
            return setParamVideoRotation(degrees);
        }
    } else if (key == "video-param-i-frames-interval") {
        int32_t seconds;
        if (safe_strtoi32(value.string(), &seconds)) {
            return setParamVideoIFramesInterval(seconds);
        }
    } else if (key == "video-param-encoder-profile") {
        int32_t profile;
        if (safe_strtoi32(value.string(), &profile)) {
            return setParamVideoEncoderProfile(profile);
        }
    } else if (key == "video-param-encoder-level") {
        int32_t level;
        if (safe_strtoi32(value.string(), &level)) {
            return setParamVideoEncoderLevel(level);
        }
    } else if (key == "video-param-camera-id") {
        int32_t cameraId;
        if (safe_strtoi32(value.string(), &cameraId)) {
            return setParamVideoCameraId(cameraId);
        }
    } else if (key == "video-param-time-scale") {
        int32_t timeScale;
        if (safe_strtoi32(value.string(), &timeScale)) {
            return setParamVideoTimeScale(timeScale);
        }
    } else {
        LOGE("setParameter: failed to find key %s", key.string());
    }
    return BAD_VALUE;
}

status_t StagefrightRecorder::setParameters(const String8 &params) {
    LOGV("setParameters: %s", params.string());
    const char *cparams = params.string();
    const char *key_start = cparams;
    for (;;) {
        const char *equal_pos = strchr(key_start, '=');
        if (equal_pos == NULL) {
            LOGE("Parameters %s miss a value", cparams);
            return BAD_VALUE;
        }
        String8 key(key_start, equal_pos - key_start);
        TrimString(&key);
        if (key.length() == 0) {
            LOGE("Parameters %s contains an empty key", cparams);
            return BAD_VALUE;
        }
        const char *value_start = equal_pos + 1;
        const char *semicolon_pos = strchr(value_start, ';');
        String8 value;
        if (semicolon_pos == NULL) {
            value.setTo(value_start);
        } else {
            value.setTo(value_start, semicolon_pos - value_start);
        }
        if (setParameter(key, value) != OK) {
            return BAD_VALUE;
        }
        if (semicolon_pos == NULL) {
            break;  // Reaches the end
        }
        key_start = semicolon_pos + 1;
    }
    return OK;
}

status_t StagefrightRecorder::setListener(const sp<IMediaRecorderClient> &listener) {
    mListener = listener;

    return OK;
}

status_t StagefrightRecorder::prepare() {
    return OK;
}

status_t StagefrightRecorder::start() {
    CHECK(mOutputFd >= 0);

    if (mWriter != NULL) {
        LOGE("File writer is not avaialble");
        return UNKNOWN_ERROR;
    }

    switch (mOutputFormat) {
        case OUTPUT_FORMAT_DEFAULT:
        case OUTPUT_FORMAT_THREE_GPP:
        case OUTPUT_FORMAT_MPEG_4:
            return startMPEG4Recording();

        case OUTPUT_FORMAT_AMR_NB:
        case OUTPUT_FORMAT_AMR_WB:
            return startAMRRecording();

        case OUTPUT_FORMAT_AAC_ADIF:
        case OUTPUT_FORMAT_AAC_ADTS:
            return startAACRecording();

        case OUTPUT_FORMAT_RTP_AVP:
            return startRTPRecording();

        case OUTPUT_FORMAT_MPEG2TS:
            return startMPEG2TSRecording();

        default:
            LOGE("Unsupported output file format: %d", mOutputFormat);
            return UNKNOWN_ERROR;
    }
}

sp<MediaSource> StagefrightRecorder::createAudioSource() {
    sp<AudioSource> audioSource =
        new AudioSource(
                mAudioSource,
                mSampleRate,
                mAudioChannels);

    status_t err = audioSource->initCheck();

    if (err != OK) {
        LOGE("audio source is not initialized");
        return NULL;
    }

    sp<MetaData> encMeta = new MetaData;
    const char *mime;
    switch (mAudioEncoder) {
        case AUDIO_ENCODER_AMR_NB:
        case AUDIO_ENCODER_DEFAULT:
            mime = MEDIA_MIMETYPE_AUDIO_AMR_NB;
            break;
        case AUDIO_ENCODER_AMR_WB:
            mime = MEDIA_MIMETYPE_AUDIO_AMR_WB;
            break;
        case AUDIO_ENCODER_AAC:
            mime = MEDIA_MIMETYPE_AUDIO_AAC;
            break;
        default:
            LOGE("Unknown audio encoder: %d", mAudioEncoder);
            return NULL;
    }
    encMeta->setCString(kKeyMIMEType, mime);

    int32_t maxInputSize;
    CHECK(audioSource->getFormat()->findInt32(
                kKeyMaxInputSize, &maxInputSize));

    encMeta->setInt32(kKeyMaxInputSize, maxInputSize);
    encMeta->setInt32(kKeyChannelCount, mAudioChannels);
    encMeta->setInt32(kKeySampleRate, mSampleRate);
    encMeta->setInt32(kKeyBitRate, mAudioBitRate);
    if (mAudioTimeScale > 0) {
        encMeta->setInt32(kKeyTimeScale, mAudioTimeScale);
    }

    OMXClient client;
    CHECK_EQ(client.connect(), OK);

    sp<MediaSource> audioEncoder =
        OMXCodec::Create(client.interface(), encMeta,
                         true /* createEncoder */, audioSource);
    mAudioSourceNode = audioSource;

    return audioEncoder;
}

status_t StagefrightRecorder::startAACRecording() {
    CHECK(mOutputFormat == OUTPUT_FORMAT_AAC_ADIF ||
          mOutputFormat == OUTPUT_FORMAT_AAC_ADTS);

    CHECK(mAudioEncoder == AUDIO_ENCODER_AAC);
    CHECK(mAudioSource != AUDIO_SOURCE_LIST_END);

    CHECK(0 == "AACWriter is not implemented yet");

    return OK;
}

status_t StagefrightRecorder::startAMRRecording() {
    CHECK(mOutputFormat == OUTPUT_FORMAT_AMR_NB ||
          mOutputFormat == OUTPUT_FORMAT_AMR_WB);

    if (mOutputFormat == OUTPUT_FORMAT_AMR_NB) {
        if (mAudioEncoder != AUDIO_ENCODER_DEFAULT &&
            mAudioEncoder != AUDIO_ENCODER_AMR_NB) {
            LOGE("Invalid encoder %d used for AMRNB recording",
                    mAudioEncoder);
            return BAD_VALUE;
        }
        if (mSampleRate != 8000) {
            LOGE("Invalid sampling rate %d used for AMRNB recording",
                    mSampleRate);
            return BAD_VALUE;
        }
    } else {  // mOutputFormat must be OUTPUT_FORMAT_AMR_WB
        if (mAudioEncoder != AUDIO_ENCODER_AMR_WB) {
            LOGE("Invlaid encoder %d used for AMRWB recording",
                    mAudioEncoder);
            return BAD_VALUE;
        }
        if (mSampleRate != 16000) {
            LOGE("Invalid sample rate %d used for AMRWB recording",
                    mSampleRate);
            return BAD_VALUE;
        }
    }
    if (mAudioChannels != 1) {
        LOGE("Invalid number of audio channels %d used for amr recording",
                mAudioChannels);
        return BAD_VALUE;
    }

    if (mAudioSource >= AUDIO_SOURCE_LIST_END) {
        LOGE("Invalid audio source: %d", mAudioSource);
        return BAD_VALUE;
    }

    sp<MediaSource> audioEncoder = createAudioSource();

    if (audioEncoder == NULL) {
        return UNKNOWN_ERROR;
    }

    mWriter = new AMRWriter(dup(mOutputFd));
    mWriter->addSource(audioEncoder);

    if (mMaxFileDurationUs != 0) {
        mWriter->setMaxFileDuration(mMaxFileDurationUs);
    }
    if (mMaxFileSizeBytes != 0) {
        mWriter->setMaxFileSize(mMaxFileSizeBytes);
    }
    mWriter->setListener(mListener);
    mWriter->start();

    return OK;
}

status_t StagefrightRecorder::startRTPRecording() {
    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_RTP_AVP);

    if ((mAudioSource != AUDIO_SOURCE_LIST_END
                && mVideoSource != VIDEO_SOURCE_LIST_END)
            || (mAudioSource == AUDIO_SOURCE_LIST_END
                && mVideoSource == VIDEO_SOURCE_LIST_END)) {
        // Must have exactly one source.
        return BAD_VALUE;
    }

    if (mOutputFd < 0) {
        return BAD_VALUE;
    }

    sp<MediaSource> source;

    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
        source = createAudioSource();
    } else {
        status_t err = setupVideoEncoder(&source);
        if (err != OK) {
            return err;
        }
    }

    mWriter = new ARTPWriter(dup(mOutputFd));
    mWriter->addSource(source);
    mWriter->setListener(mListener);

    return mWriter->start();
}

status_t StagefrightRecorder::startMPEG2TSRecording() {
    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_MPEG2TS);

    sp<MediaWriter> writer = new MPEG2TSWriter(dup(mOutputFd));

    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
        if (mAudioEncoder != AUDIO_ENCODER_AAC) {
            return ERROR_UNSUPPORTED;
        }

        status_t err = setupAudioEncoder(writer);

        if (err != OK) {
            return err;
        }
    }

    if (mVideoSource == VIDEO_SOURCE_DEFAULT
            || mVideoSource == VIDEO_SOURCE_CAMERA) {
        if (mVideoEncoder != VIDEO_ENCODER_H264) {
            return ERROR_UNSUPPORTED;
        }

        sp<MediaSource> encoder;
        status_t err = setupVideoEncoder(&encoder);

        if (err != OK) {
            return err;
        }

        writer->addSource(encoder);
    }

    if (mMaxFileDurationUs != 0) {
        writer->setMaxFileDuration(mMaxFileDurationUs);
    }

    if (mMaxFileSizeBytes != 0) {
        writer->setMaxFileSize(mMaxFileSizeBytes);
    }

    mWriter = writer;

    return mWriter->start();
}

void StagefrightRecorder::clipVideoFrameRate() {
    LOGV("clipVideoFrameRate: encoder %d", mVideoEncoder);
    int minFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.fps.min", mVideoEncoder);
    int maxFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.fps.max", mVideoEncoder);
    if (mFrameRate < minFrameRate) {
        LOGW("Intended video encoding frame rate (%d fps) is too small"
             " and will be set to (%d fps)", mFrameRate, minFrameRate);
        mFrameRate = minFrameRate;
    } else if (mFrameRate > maxFrameRate) {
        LOGW("Intended video encoding frame rate (%d fps) is too large"
             " and will be set to (%d fps)", mFrameRate, maxFrameRate);
        mFrameRate = maxFrameRate;
    }
}

void StagefrightRecorder::clipVideoBitRate() {
    LOGV("clipVideoBitRate: encoder %d", mVideoEncoder);
    int minBitRate = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.bps.min", mVideoEncoder);
    int maxBitRate = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.bps.max", mVideoEncoder);
    if (mVideoBitRate < minBitRate) {
        LOGW("Intended video encoding bit rate (%d bps) is too small"
             " and will be set to (%d bps)", mVideoBitRate, minBitRate);
        mVideoBitRate = minBitRate;
    } else if (mVideoBitRate > maxBitRate) {
        LOGW("Intended video encoding bit rate (%d bps) is too large"
             " and will be set to (%d bps)", mVideoBitRate, maxBitRate);
        mVideoBitRate = maxBitRate;
    }
}

void StagefrightRecorder::clipVideoFrameWidth() {
    LOGV("clipVideoFrameWidth: encoder %d", mVideoEncoder);
    int minFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.width.min", mVideoEncoder);
    int maxFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.width.max", mVideoEncoder);
    if (mVideoWidth < minFrameWidth) {
        LOGW("Intended video encoding frame width (%d) is too small"
             " and will be set to (%d)", mVideoWidth, minFrameWidth);
        mVideoWidth = minFrameWidth;
    } else if (mVideoWidth > maxFrameWidth) {
        LOGW("Intended video encoding frame width (%d) is too large"
             " and will be set to (%d)", mVideoWidth, maxFrameWidth);
        mVideoWidth = maxFrameWidth;
    }
}

status_t StagefrightRecorder::setupCameraSource() {
    clipVideoBitRate();
    clipVideoFrameRate();
    clipVideoFrameWidth();
    clipVideoFrameHeight();

    int64_t token = IPCThreadState::self()->clearCallingIdentity();
    if (mCamera == 0) {
        mCamera = Camera::connect(mCameraId);
        if (mCamera == 0) {
            LOGE("Camera connection could not be established.");
            return -EBUSY;
        }
        mFlags &= ~FLAGS_HOT_CAMERA;
        mCamera->lock();
    }

    // Set the actual video recording frame size
    CameraParameters params(mCamera->getParameters());
    params.setPreviewSize(mVideoWidth, mVideoHeight);
    params.setPreviewFrameRate(mFrameRate);
    String8 s = params.flatten();
    if (OK != mCamera->setParameters(s)) {
        LOGE("Could not change settings."
             " Someone else is using camera %d?", mCameraId);
        return -EBUSY;
    }
    CameraParameters newCameraParams(mCamera->getParameters());

    // Check on video frame size
    int frameWidth = 0, frameHeight = 0;
    newCameraParams.getPreviewSize(&frameWidth, &frameHeight);
    if (frameWidth  < 0 || frameWidth  != mVideoWidth ||
        frameHeight < 0 || frameHeight != mVideoHeight) {
        LOGE("Failed to set the video frame size to %dx%d",
                mVideoWidth, mVideoHeight);
        IPCThreadState::self()->restoreCallingIdentity(token);
        return UNKNOWN_ERROR;
    }

    // Check on video frame rate
    int frameRate = newCameraParams.getPreviewFrameRate();
    if (frameRate < 0 || (frameRate - mFrameRate) != 0) {
        LOGE("Failed to set frame rate to %d fps. The actual "
             "frame rate is %d", mFrameRate, frameRate);
    }

    // This CHECK is good, since we just passed the lock/unlock
    // check earlier by calling mCamera->setParameters().
    CHECK_EQ(OK, mCamera->setPreviewDisplay(mPreviewSurface));
    IPCThreadState::self()->restoreCallingIdentity(token);
    return OK;
}

void StagefrightRecorder::clipVideoFrameHeight() {
    LOGV("clipVideoFrameHeight: encoder %d", mVideoEncoder);
    int minFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.height.min", mVideoEncoder);
    int maxFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
                        "enc.vid.height.max", mVideoEncoder);
    if (mVideoHeight < minFrameHeight) {
        LOGW("Intended video encoding frame height (%d) is too small"
             " and will be set to (%d)", mVideoHeight, minFrameHeight);
        mVideoHeight = minFrameHeight;
    } else if (mVideoHeight > maxFrameHeight) {
        LOGW("Intended video encoding frame height (%d) is too large"
             " and will be set to (%d)", mVideoHeight, maxFrameHeight);
        mVideoHeight = maxFrameHeight;
    }
}

status_t StagefrightRecorder::setupVideoEncoder(sp<MediaSource> *source) {
    source->clear();

    status_t err = setupCameraSource();
    if (err != OK) return err;

    sp<CameraSource> cameraSource = CameraSource::CreateFromCamera(mCamera);
    CHECK(cameraSource != NULL);

    sp<MetaData> enc_meta = new MetaData;
    enc_meta->setInt32(kKeyBitRate, mVideoBitRate);
    enc_meta->setInt32(kKeySampleRate, mFrameRate);

    switch (mVideoEncoder) {
        case VIDEO_ENCODER_H263:
            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_H263);
            break;

        case VIDEO_ENCODER_MPEG_4_SP:
            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4);
            break;

        case VIDEO_ENCODER_H264:
            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
            break;

        default:
            CHECK(!"Should not be here, unsupported video encoding.");
            break;
    }

    sp<MetaData> meta = cameraSource->getFormat();

    int32_t width, height, stride, sliceHeight, colorFormat;
    CHECK(meta->findInt32(kKeyWidth, &width));
    CHECK(meta->findInt32(kKeyHeight, &height));
    CHECK(meta->findInt32(kKeyStride, &stride));
    CHECK(meta->findInt32(kKeySliceHeight, &sliceHeight));
    CHECK(meta->findInt32(kKeyColorFormat, &colorFormat));

    enc_meta->setInt32(kKeyWidth, width);
    enc_meta->setInt32(kKeyHeight, height);
    enc_meta->setInt32(kKeyIFramesInterval, mIFramesIntervalSec);
    enc_meta->setInt32(kKeyStride, stride);
    enc_meta->setInt32(kKeySliceHeight, sliceHeight);
    enc_meta->setInt32(kKeyColorFormat, colorFormat);
    if (mVideoTimeScale > 0) {
        enc_meta->setInt32(kKeyTimeScale, mVideoTimeScale);
    }
    if (mVideoEncoderProfile != -1) {
        enc_meta->setInt32(kKeyVideoProfile, mVideoEncoderProfile);
    }
    if (mVideoEncoderLevel != -1) {
        enc_meta->setInt32(kKeyVideoLevel, mVideoEncoderLevel);
    }

    OMXClient client;
    CHECK_EQ(client.connect(), OK);

    sp<MediaSource> encoder = OMXCodec::Create(
            client.interface(), enc_meta,
            true /* createEncoder */, cameraSource);
    if (encoder == NULL) {
        return UNKNOWN_ERROR;
    }

    *source = encoder;

    return OK;
}

status_t StagefrightRecorder::setupAudioEncoder(const sp<MediaWriter>& writer) {
    sp<MediaSource> audioEncoder;
    switch(mAudioEncoder) {
        case AUDIO_ENCODER_AMR_NB:
        case AUDIO_ENCODER_AMR_WB:
        case AUDIO_ENCODER_AAC:
            audioEncoder = createAudioSource();
            break;
        default:
            LOGE("Unsupported audio encoder: %d", mAudioEncoder);
            return UNKNOWN_ERROR;
    }

    if (audioEncoder == NULL) {
        return UNKNOWN_ERROR;
    }

    writer->addSource(audioEncoder);
    return OK;
}

status_t StagefrightRecorder::startMPEG4Recording() {
    int32_t totalBitRate = 0;
    status_t err = OK;
    sp<MediaWriter> writer = new MPEG4Writer(dup(mOutputFd));

    // Add audio source first if it exists
    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
        err = setupAudioEncoder(writer);
        if (err != OK) return err;
        totalBitRate += mAudioBitRate;
    }
    if (mVideoSource == VIDEO_SOURCE_DEFAULT
            || mVideoSource == VIDEO_SOURCE_CAMERA) {
        sp<MediaSource> encoder;
        err = setupVideoEncoder(&encoder);
        if (err != OK) return err;
        writer->addSource(encoder);
        totalBitRate += mVideoBitRate;
    }

    if (mInterleaveDurationUs > 0) {
        reinterpret_cast<MPEG4Writer *>(writer.get())->
            setInterleaveDuration(mInterleaveDurationUs);
    }

    if (mMaxFileDurationUs != 0) {
        writer->setMaxFileDuration(mMaxFileDurationUs);
    }
    if (mMaxFileSizeBytes != 0) {
        writer->setMaxFileSize(mMaxFileSizeBytes);
    }
    sp<MetaData> meta = new MetaData;
    meta->setInt64(kKeyTime, systemTime() / 1000);
    meta->setInt32(kKeyFileType, mOutputFormat);
    meta->setInt32(kKeyBitRate, totalBitRate);
    meta->setInt32(kKey64BitFileOffset, mUse64BitFileOffset);
    if (mMovieTimeScale > 0) {
        meta->setInt32(kKeyTimeScale, mMovieTimeScale);
    }
    if (mTrackEveryTimeDurationUs > 0) {
        meta->setInt64(kKeyTrackTimeStatus, mTrackEveryTimeDurationUs);
    }
    if (mRotationDegrees != 0) {
        meta->setInt32(kKeyRotationDegree, mRotationDegrees);
    }
    writer->setListener(mListener);
    mWriter = writer;
    return mWriter->start(meta.get());
}

status_t StagefrightRecorder::pause() {
    LOGV("pause");
    if (mWriter == NULL) {
        return UNKNOWN_ERROR;
    }
    mWriter->pause();
    return OK;
}

status_t StagefrightRecorder::stop() {
    LOGV("stop");
    status_t err = OK;
    if (mWriter != NULL) {
        err = mWriter->stop();
        mWriter.clear();
    }

    if (mCamera != 0) {
        LOGV("Disconnect camera");
        int64_t token = IPCThreadState::self()->clearCallingIdentity();
        if ((mFlags & FLAGS_HOT_CAMERA) == 0) {
            LOGV("Camera was cold when we started, stopping preview");
            mCamera->stopPreview();
        }
        mCamera->unlock();
        mCamera.clear();
        IPCThreadState::self()->restoreCallingIdentity(token);
        mFlags = 0;
    }

    if (mOutputFd >= 0) {
        ::close(mOutputFd);
        mOutputFd = -1;
    }

    return err;
}

status_t StagefrightRecorder::close() {
    LOGV("close");
    stop();

    return OK;
}

status_t StagefrightRecorder::reset() {
    LOGV("reset");
    stop();

    // No audio or video source by default
    mAudioSource = AUDIO_SOURCE_LIST_END;
    mVideoSource = VIDEO_SOURCE_LIST_END;

    // Default parameters
    mOutputFormat  = OUTPUT_FORMAT_THREE_GPP;
    mAudioEncoder  = AUDIO_ENCODER_AMR_NB;
    mVideoEncoder  = VIDEO_ENCODER_H263;
    mVideoWidth    = 176;
    mVideoHeight   = 144;
    mFrameRate     = 20;
    mVideoBitRate  = 192000;
    mSampleRate    = 8000;
    mAudioChannels = 1;
    mAudioBitRate  = 12200;
    mInterleaveDurationUs = 0;
    mIFramesIntervalSec = 1;
    mAudioSourceNode = 0;
    mUse64BitFileOffset = false;
    mMovieTimeScale  = -1;
    mAudioTimeScale  = -1;
    mVideoTimeScale  = -1;
    mCameraId        = 0;
    mVideoEncoderProfile = -1;
    mVideoEncoderLevel   = -1;
    mMaxFileDurationUs = 0;
    mMaxFileSizeBytes = 0;
    mTrackEveryTimeDurationUs = 0;
    mRotationDegrees = 0;
    mEncoderProfiles = MediaProfiles::getInstance();

    mOutputFd = -1;
    mFlags = 0;

    return OK;
}

status_t StagefrightRecorder::getMaxAmplitude(int *max) {
    LOGV("getMaxAmplitude");

    if (max == NULL) {
        LOGE("Null pointer argument");
        return BAD_VALUE;
    }

    if (mAudioSourceNode != 0) {
        *max = mAudioSourceNode->getMaxAmplitude();
    } else {
        *max = 0;
    }

    return OK;
}

status_t StagefrightRecorder::dump(
        int fd, const Vector<String16>& args) const {
    LOGV("dump");
    const size_t SIZE = 256;
    char buffer[SIZE];
    String8 result;
    if (mWriter != 0) {
        mWriter->dump(fd, args);
    } else {
        snprintf(buffer, SIZE, "   No file writer\n");
        result.append(buffer);
    }
    snprintf(buffer, SIZE, "   Recorder: %p\n", this);
    snprintf(buffer, SIZE, "   Output file (fd %d):\n", mOutputFd);
    result.append(buffer);
    snprintf(buffer, SIZE, "     File format: %d\n", mOutputFormat);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Max file size (bytes): %lld\n", mMaxFileSizeBytes);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Max file duration (us): %lld\n", mMaxFileDurationUs);
    result.append(buffer);
    snprintf(buffer, SIZE, "     File offset length (bits): %d\n", mUse64BitFileOffset? 64: 32);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Interleave duration (us): %d\n", mInterleaveDurationUs);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Progress notification: %lld us\n", mTrackEveryTimeDurationUs);
    result.append(buffer);
    snprintf(buffer, SIZE, "   Audio\n");
    result.append(buffer);
    snprintf(buffer, SIZE, "     Source: %d\n", mAudioSource);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Encoder: %d\n", mAudioEncoder);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mAudioBitRate);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Sampling rate (hz): %d\n", mSampleRate);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Number of channels: %d\n", mAudioChannels);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Max amplitude: %d\n", mAudioSourceNode == 0? 0: mAudioSourceNode->getMaxAmplitude());
    result.append(buffer);
    snprintf(buffer, SIZE, "   Video\n");
    result.append(buffer);
    snprintf(buffer, SIZE, "     Source: %d\n", mVideoSource);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Camera Id: %d\n", mCameraId);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Camera flags: %d\n", mFlags);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Encoder: %d\n", mVideoEncoder);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Encoder profile: %d\n", mVideoEncoderProfile);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Encoder level: %d\n", mVideoEncoderLevel);
    result.append(buffer);
    snprintf(buffer, SIZE, "     I frames interval (s): %d\n", mIFramesIntervalSec);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Frame size (pixels): %dx%d\n", mVideoWidth, mVideoHeight);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Frame rate (fps): %d\n", mFrameRate);
    result.append(buffer);
    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mVideoBitRate);
    result.append(buffer);
    ::write(fd, result.string(), result.size());
    return OK;
}
}  // namespace android
