diff options
Diffstat (limited to 'media/sfplugin/SkipCutBuffer.cpp')
| -rw-r--r-- | media/sfplugin/SkipCutBuffer.cpp | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/media/sfplugin/SkipCutBuffer.cpp b/media/sfplugin/SkipCutBuffer.cpp deleted file mode 100644 index 5762440..0000000 --- a/media/sfplugin/SkipCutBuffer.cpp +++ /dev/null @@ -1,206 +0,0 @@ -/* - * Copyright (C) 2012 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 "SkipCutBuffer" -#include <utils/Log.h> - -#include <media/stagefright/foundation/ADebug.h> -#include <media/stagefright/MediaBuffer.h> -#include <media/stagefright/SkipCutBuffer.h> - -namespace android { - -SkipCutBuffer::SkipCutBuffer(size_t skip, size_t cut, size_t num16BitChannels) { - - mWriteHead = 0; - mReadHead = 0; - mCapacity = 0; - mCutBuffer = nullptr; - - if (num16BitChannels == 0 || num16BitChannels > INT32_MAX / 2) { - ALOGW("# channels out of range: %zu, using passthrough instead", num16BitChannels); - return; - } - size_t frameSize = num16BitChannels * 2; - if (skip > INT32_MAX / frameSize || cut > INT32_MAX / frameSize - || cut * frameSize > INT32_MAX - 4096) { - ALOGW("out of range skip/cut: %zu/%zu, using passthrough instead", - skip, cut); - return; - } - skip *= frameSize; - cut *= frameSize; - - mFrontPadding = mSkip = skip; - mBackPadding = cut; - mCapacity = cut + 4096; - mCutBuffer = new (std::nothrow) char[mCapacity]; - ALOGV("skipcutbuffer %zu %zu %d", skip, cut, mCapacity); -} - -SkipCutBuffer::~SkipCutBuffer() { - delete[] mCutBuffer; -} - -void SkipCutBuffer::submit(MediaBuffer *buffer) { - if (mCutBuffer == nullptr) { - // passthrough mode - return; - } - - int32_t offset = buffer->range_offset(); - int32_t buflen = buffer->range_length(); - - // drop the initial data from the buffer if needed - if (mFrontPadding > 0) { - // still data left to drop - int32_t to_drop = (buflen < mFrontPadding) ? buflen : mFrontPadding; - offset += to_drop; - buflen -= to_drop; - buffer->set_range(offset, buflen); - mFrontPadding -= to_drop; - } - - - // append data to cutbuffer - char *src = ((char*) buffer->data()) + offset; - write(src, buflen); - - - // the mediabuffer is now empty. Fill it from cutbuffer, always leaving - // at least mBackPadding bytes in the cutbuffer - char *dst = (char*) buffer->data(); - size_t copied = read(dst, buffer->size()); - buffer->set_range(0, copied); -} - -template <typename T> -void SkipCutBuffer::submitInternal(const sp<T>& buffer) { - if (mCutBuffer == nullptr) { - // passthrough mode - return; - } - - int32_t offset = buffer->offset(); - int32_t buflen = buffer->size(); - - // drop the initial data from the buffer if needed - if (mFrontPadding > 0) { - // still data left to drop - int32_t to_drop = (buflen < mFrontPadding) ? buflen : mFrontPadding; - offset += to_drop; - buflen -= to_drop; - buffer->setRange(offset, buflen); - mFrontPadding -= to_drop; - } - - - // append data to cutbuffer - char *src = (char*) buffer->data(); - write(src, buflen); - - - // the mediabuffer is now empty. Fill it from cutbuffer, always leaving - // at least mBackPadding bytes in the cutbuffer - char *dst = (char*) buffer->base(); - size_t copied = read(dst, buffer->capacity()); - buffer->setRange(0, copied); -} - -void SkipCutBuffer::submit(const sp<ABuffer>& buffer) { - submitInternal(buffer); -} - -void SkipCutBuffer::submit(const sp<MediaCodecBuffer>& buffer) { - submitInternal(buffer); -} - -void SkipCutBuffer::clear() { - mWriteHead = mReadHead = 0; - mFrontPadding = mSkip; -} - -void SkipCutBuffer::write(const char *src, size_t num) { - int32_t sizeused = (mWriteHead - mReadHead); - if (sizeused < 0) sizeused += mCapacity; - - // Everything must fit. Make sure the buffer is a little larger than needed, - // so there is no ambiguity as to whether mWriteHead == mReadHead means buffer - // full or empty - size_t available = mCapacity - sizeused - 32; - if (available < num) { - int32_t newcapacity = mCapacity + (num - available); - char * newbuffer = new char[newcapacity]; - memcpy(newbuffer, mCutBuffer, mCapacity); - delete [] mCutBuffer; - mCapacity = newcapacity; - mCutBuffer = newbuffer; - ALOGV("reallocated buffer at size %d", newcapacity); - } - - size_t copyfirst = (mCapacity - mWriteHead); - if (copyfirst > num) copyfirst = num; - if (copyfirst) { - memcpy(mCutBuffer + mWriteHead, src, copyfirst); - num -= copyfirst; - src += copyfirst; - mWriteHead += copyfirst; - CHECK_LE(mWriteHead, mCapacity); - if (mWriteHead == mCapacity) mWriteHead = 0; - if (num) { - memcpy(mCutBuffer, src, num); - mWriteHead += num; - } - } -} - -size_t SkipCutBuffer::read(char *dst, size_t num) { - int32_t available = (mWriteHead - mReadHead); - if (available < 0) available += mCapacity; - - available -= mBackPadding; - if (available <=0) { - return 0; - } - if (available < int32_t(num)) { - num = available; - } - - size_t copyfirst = (mCapacity - mReadHead); - if (copyfirst > num) copyfirst = num; - if (copyfirst) { - memcpy(dst, mCutBuffer + mReadHead, copyfirst); - num -= copyfirst; - dst += copyfirst; - mReadHead += copyfirst; - CHECK_LE(mReadHead, mCapacity); - if (mReadHead == mCapacity) mReadHead = 0; - if (num) { - memcpy(dst, mCutBuffer, num); - mReadHead += num; - } - } - return available; -} - -size_t SkipCutBuffer::size() { - int32_t available = (mWriteHead - mReadHead); - if (available < 0) available += mCapacity; - return available; -} - -} // namespace android |