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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/SyncRunnable.h"
#include "mozilla/TaskQueue.h"
#include <string.h>
#ifdef __GNUC__
#include <unistd.h>
#endif
#include "FFmpegLog.h"
#include "FFmpegDataDecoder.h"
#include "prsystem.h"
namespace mozilla
{
StaticMutex FFmpegDataDecoder<LIBAV_VER>::sMonitor;
FFmpegDataDecoder<LIBAV_VER>::FFmpegDataDecoder(FFmpegLibWrapper* aLib,
TaskQueue* aTaskQueue,
MediaDataDecoderCallback* aCallback,
AVCodecID aCodecID)
: mLib(aLib)
, mCallback(aCallback)
, mCodecContext(nullptr)
, mFrame(NULL)
, mExtraData(nullptr)
, mCodecID(aCodecID)
, mTaskQueue(aTaskQueue)
, mIsFlushing(false)
{
MOZ_ASSERT(aLib);
MOZ_COUNT_CTOR(FFmpegDataDecoder);
}
FFmpegDataDecoder<LIBAV_VER>::~FFmpegDataDecoder()
{
MOZ_COUNT_DTOR(FFmpegDataDecoder);
}
nsresult
FFmpegDataDecoder<LIBAV_VER>::InitDecoder()
{
FFMPEG_LOG("Initialising FFmpeg decoder.");
AVCodec* codec = FindAVCodec(mLib, mCodecID);
if (!codec) {
NS_WARNING("Couldn't find ffmpeg decoder");
return NS_ERROR_FAILURE;
}
StaticMutexAutoLock mon(sMonitor);
if (!(mCodecContext = mLib->avcodec_alloc_context3(codec))) {
NS_WARNING("Couldn't init ffmpeg context");
return NS_ERROR_FAILURE;
}
mCodecContext->opaque = this;
InitCodecContext();
if (mExtraData) {
mCodecContext->extradata_size = mExtraData->Length();
// FFmpeg may use SIMD instructions to access the data which reads the
// data in 32 bytes block. Must ensure we have enough data to read.
#if LIBAVCODEC_VERSION_MAJOR >= 58
mExtraData->AppendElements(AV_INPUT_BUFFER_PADDING_SIZE);
#else
mExtraData->AppendElements(FF_INPUT_BUFFER_PADDING_SIZE);
#endif
mCodecContext->extradata = mExtraData->Elements();
} else {
mCodecContext->extradata_size = 0;
}
#if LIBAVCODEC_VERSION_MAJOR < 57
if (codec->capabilities & CODEC_CAP_DR1) {
mCodecContext->flags |= CODEC_FLAG_EMU_EDGE;
}
#endif
if (mLib->avcodec_open2(mCodecContext, codec, nullptr) < 0) {
NS_WARNING("Couldn't initialise ffmpeg decoder");
mLib->avcodec_close(mCodecContext);
mLib->av_freep(&mCodecContext);
return NS_ERROR_FAILURE;
}
FFMPEG_LOG("FFmpeg init successful.");
return NS_OK;
}
void
FFmpegDataDecoder<LIBAV_VER>::Shutdown()
{
if (mTaskQueue) {
nsCOMPtr<nsIRunnable> runnable =
NewRunnableMethod(this, &FFmpegDataDecoder<LIBAV_VER>::ProcessShutdown);
mTaskQueue->Dispatch(runnable.forget());
} else {
ProcessShutdown();
}
}
void
FFmpegDataDecoder<LIBAV_VER>::ProcessDecode(MediaRawData* aSample)
{
MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn());
if (mIsFlushing) {
return;
}
MediaResult rv = DoDecode(aSample);
if (NS_FAILED(rv)) {
mCallback->Error(rv);
} else {
mCallback->InputExhausted();
}
}
void
FFmpegDataDecoder<LIBAV_VER>::Input(MediaRawData* aSample)
{
mTaskQueue->Dispatch(NewRunnableMethod<RefPtr<MediaRawData>>(
this, &FFmpegDataDecoder::ProcessDecode, aSample));
}
void
FFmpegDataDecoder<LIBAV_VER>::Flush()
{
MOZ_ASSERT(mCallback->OnReaderTaskQueue());
mIsFlushing = true;
nsCOMPtr<nsIRunnable> runnable =
NewRunnableMethod(this, &FFmpegDataDecoder<LIBAV_VER>::ProcessFlush);
SyncRunnable::DispatchToThread(mTaskQueue, runnable);
mIsFlushing = false;
}
void
FFmpegDataDecoder<LIBAV_VER>::Drain()
{
MOZ_ASSERT(mCallback->OnReaderTaskQueue());
nsCOMPtr<nsIRunnable> runnable =
NewRunnableMethod(this, &FFmpegDataDecoder<LIBAV_VER>::ProcessDrain);
mTaskQueue->Dispatch(runnable.forget());
}
void
FFmpegDataDecoder<LIBAV_VER>::ProcessFlush()
{
MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn());
if (mCodecContext) {
mLib->avcodec_flush_buffers(mCodecContext);
}
}
void
FFmpegDataDecoder<LIBAV_VER>::ProcessShutdown()
{
StaticMutexAutoLock mon(sMonitor);
if (mCodecContext) {
mLib->avcodec_close(mCodecContext);
mLib->av_freep(&mCodecContext);
#if LIBAVCODEC_VERSION_MAJOR >= 55
mLib->av_frame_free(&mFrame);
#elif LIBAVCODEC_VERSION_MAJOR == 54
mLib->avcodec_free_frame(&mFrame);
#else
mLib->av_freep(&mFrame);
#endif
}
}
AVFrame*
FFmpegDataDecoder<LIBAV_VER>::PrepareFrame()
{
MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn());
#if LIBAVCODEC_VERSION_MAJOR >= 55
if (mFrame) {
mLib->av_frame_unref(mFrame);
} else {
mFrame = mLib->av_frame_alloc();
}
#elif LIBAVCODEC_VERSION_MAJOR == 54
if (mFrame) {
mLib->avcodec_get_frame_defaults(mFrame);
} else {
mFrame = mLib->avcodec_alloc_frame();
}
#else
mLib->av_freep(&mFrame);
mFrame = mLib->avcodec_alloc_frame();
#endif
return mFrame;
}
/* static */ AVCodec*
FFmpegDataDecoder<LIBAV_VER>::FindAVCodec(FFmpegLibWrapper* aLib,
AVCodecID aCodec)
{
return aLib->avcodec_find_decoder(aCodec);
}
} // namespace mozilla
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