mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-30 07:26:53 +08:00
423 lines
12 KiB
C++
423 lines
12 KiB
C++
/*
|
|
* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
|
|
*
|
|
* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
|
|
*
|
|
* Use of this source code is governed by MIT license that can be found in the
|
|
* LICENSE file in the root of the source tree. All contributing project authors
|
|
* may be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "FFMpegDecoder.h"
|
|
#define MAX_DELAY_SECOND 3
|
|
|
|
using namespace std;
|
|
using namespace mediakit;
|
|
|
|
static string ffmpeg_err(int errnum) {
|
|
char errbuf[AV_ERROR_MAX_STRING_SIZE];
|
|
av_strerror(errnum, errbuf, AV_ERROR_MAX_STRING_SIZE);
|
|
return errbuf;
|
|
}
|
|
|
|
std::shared_ptr<AVPacket> alloc_av_packet(){
|
|
auto pkt = std::shared_ptr<AVPacket>(av_packet_alloc(), [](AVPacket *pkt) {
|
|
av_packet_free(&pkt);
|
|
});
|
|
pkt->data = NULL; // packet data will be allocated by the encoder
|
|
pkt->size = 0;
|
|
return pkt;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
template<bool decoder = true, typename ...ARGS>
|
|
AVCodec *getCodec(ARGS ...names);
|
|
|
|
template<bool decoder = true>
|
|
AVCodec *getCodec(const char *name) {
|
|
auto codec = decoder ? avcodec_find_decoder_by_name(name) : avcodec_find_encoder_by_name(name);
|
|
if (codec) {
|
|
InfoL << (decoder ? "got decoder:" : "got encoder:") << name;
|
|
}
|
|
return codec;
|
|
}
|
|
|
|
template<bool decoder = true>
|
|
AVCodec *getCodec(enum AVCodecID id) {
|
|
auto codec = decoder ? avcodec_find_decoder(id) : avcodec_find_encoder(id);
|
|
if (codec) {
|
|
InfoL << (decoder ? "got decoder:" : "got encoder:") << avcodec_get_name(id);
|
|
}
|
|
return codec;
|
|
}
|
|
|
|
template<bool decoder = true, typename First, typename ...ARGS>
|
|
AVCodec *getCodec(First first, ARGS ...names) {
|
|
auto codec = getCodec<decoder>(names...);
|
|
if (codec) {
|
|
return codec;
|
|
}
|
|
return getCodec<decoder>(first);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
FFmpegFrame::FFmpegFrame(std::shared_ptr<AVFrame> frame) {
|
|
if (frame) {
|
|
_frame = std::move(frame);
|
|
} else {
|
|
_frame.reset(av_frame_alloc(), [](AVFrame *ptr) {
|
|
av_frame_free(&ptr);
|
|
});
|
|
}
|
|
}
|
|
|
|
FFmpegFrame::~FFmpegFrame() {
|
|
if (_data) {
|
|
delete[] _data;
|
|
_data = nullptr;
|
|
}
|
|
}
|
|
|
|
AVFrame *FFmpegFrame::get() const {
|
|
return _frame.get();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
FFmpegSwr::FFmpegSwr(AVSampleFormat output, int channel, int channel_layout, int samplerate) {
|
|
_target_format = output;
|
|
_target_channels = channel;
|
|
_target_channel_layout = channel_layout;
|
|
_target_samplerate = samplerate;
|
|
}
|
|
|
|
FFmpegSwr::~FFmpegSwr() {
|
|
if (_ctx) {
|
|
swr_free(&_ctx);
|
|
}
|
|
}
|
|
|
|
FFmpegFrame::Ptr FFmpegSwr::inputFrame(const FFmpegFrame::Ptr &frame) {
|
|
if (frame->get()->format == _target_format &&
|
|
frame->get()->channels == _target_channels &&
|
|
frame->get()->channel_layout == (uint64_t)_target_channel_layout &&
|
|
frame->get()->sample_rate == _target_samplerate) {
|
|
//不转格式
|
|
return frame;
|
|
}
|
|
if (!_ctx) {
|
|
_ctx = swr_alloc_set_opts(nullptr, _target_channel_layout, _target_format, _target_samplerate,
|
|
frame->get()->channel_layout, (AVSampleFormat) frame->get()->format,
|
|
frame->get()->sample_rate, 0, nullptr);
|
|
InfoL << "swr_alloc_set_opts:" << av_get_sample_fmt_name((enum AVSampleFormat) frame->get()->format) << " -> "
|
|
<< av_get_sample_fmt_name(_target_format);
|
|
}
|
|
if (_ctx) {
|
|
auto out = std::make_shared<FFmpegFrame>();
|
|
out->get()->format = _target_format;
|
|
out->get()->channel_layout = _target_channel_layout;
|
|
out->get()->channels = _target_channels;
|
|
out->get()->sample_rate = _target_samplerate;
|
|
out->get()->pkt_dts = frame->get()->pkt_dts;
|
|
out->get()->pts = frame->get()->pts;
|
|
|
|
int ret = 0;
|
|
if(0 != (ret = swr_convert_frame(_ctx, out->get(), frame->get()))){
|
|
WarnL << "swr_convert_frame failed:" << ffmpeg_err(ret);
|
|
return nullptr;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
FFmpegDecoder::FFmpegDecoder(const Track::Ptr &track) {
|
|
avcodec_register_all();
|
|
AVCodec *codec = nullptr;
|
|
AVCodec *codec_default = nullptr;
|
|
switch (track->getCodecId()) {
|
|
case CodecH264:
|
|
codec_default = getCodec(AV_CODEC_ID_H264);
|
|
codec = getCodec("libopenh264", AV_CODEC_ID_H264, "h264_videotoolbox", "h264_cuvid");
|
|
break;
|
|
case CodecH265:
|
|
codec_default = getCodec(AV_CODEC_ID_HEVC);
|
|
codec = getCodec(AV_CODEC_ID_HEVC, "hevc_videotoolbox", "hevc_cuvid");
|
|
break;
|
|
case CodecAAC:
|
|
codec = getCodec(AV_CODEC_ID_AAC);
|
|
break;
|
|
case CodecG711A:
|
|
codec = getCodec(AV_CODEC_ID_PCM_ALAW);
|
|
break;
|
|
case CodecG711U:
|
|
codec = getCodec(AV_CODEC_ID_PCM_MULAW);
|
|
break;
|
|
case CodecOpus:
|
|
codec = getCodec(AV_CODEC_ID_OPUS);
|
|
break;
|
|
default: break;
|
|
}
|
|
|
|
if (!codec) {
|
|
throw std::runtime_error("未找到解码器");
|
|
}
|
|
|
|
while (true) {
|
|
_context.reset(avcodec_alloc_context3(codec), [](AVCodecContext *ctx) {
|
|
avcodec_close(ctx);
|
|
avcodec_free_context(&ctx);
|
|
});
|
|
|
|
if (!_context) {
|
|
throw std::runtime_error("创建解码器失败");
|
|
}
|
|
|
|
//保存AVFrame的引用
|
|
_context->refcounted_frames = 1;
|
|
_context->flags |= AV_CODEC_FLAG_LOW_DELAY;
|
|
_context->flags2 |= AV_CODEC_FLAG2_FAST;
|
|
|
|
switch (track->getCodecId()) {
|
|
case CodecG711A:
|
|
case CodecG711U: {
|
|
AudioTrack::Ptr audio = static_pointer_cast<AudioTrack>(track);
|
|
_context->channels = audio->getAudioChannel();
|
|
_context->sample_rate = audio->getAudioSampleRate();
|
|
_context->channel_layout = av_get_default_channel_layout(_context->channels);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
AVDictionary *dict = nullptr;
|
|
av_dict_set(&dict, "threads", "auto", 0);
|
|
av_dict_set(&dict, "zerolatency", "1", 0);
|
|
av_dict_set(&dict, "strict", "-2", 0);
|
|
|
|
if (codec->capabilities & AV_CODEC_CAP_TRUNCATED) {
|
|
/* we do not send complete frames */
|
|
_context->flags |= AV_CODEC_FLAG_TRUNCATED;
|
|
} else {
|
|
// 此时业务层应该需要合帧
|
|
_do_merger = true;
|
|
}
|
|
|
|
int ret = avcodec_open2(_context.get(), codec, &dict);
|
|
av_dict_free(&dict);
|
|
if (ret >= 0) {
|
|
//成功
|
|
InfoL << "打开解码器成功:" << codec->name;
|
|
break;
|
|
}
|
|
|
|
if (codec_default && codec_default != codec) {
|
|
//硬件编解码器打开失败，尝试软件的
|
|
WarnL << "打开解码器" << codec->name << "失败，原因是:" << ffmpeg_err(ret) << ", 再尝试打开解码器" << codec_default->name;
|
|
codec = codec_default;
|
|
continue;
|
|
}
|
|
throw std::runtime_error(StrPrinter << "打开解码器" << codec->name << "失败:" << ffmpeg_err(ret));
|
|
}
|
|
|
|
if (track->getTrackType() == TrackVideo) {
|
|
startThread("decoder thread");
|
|
}
|
|
}
|
|
|
|
FFmpegDecoder::~FFmpegDecoder() {
|
|
stopThread();
|
|
}
|
|
|
|
void FFmpegDecoder::flush() {
|
|
while (true) {
|
|
auto out_frame = std::make_shared<FFmpegFrame>();
|
|
auto ret = avcodec_receive_frame(_context.get(), out_frame->get());
|
|
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
|
|
break;
|
|
}
|
|
if (ret < 0) {
|
|
WarnL << "avcodec_receive_frame failed:" << ffmpeg_err(ret);
|
|
break;
|
|
}
|
|
onDecode(out_frame);
|
|
}
|
|
}
|
|
|
|
const AVCodecContext *FFmpegDecoder::getContext() const {
|
|
return _context.get();
|
|
}
|
|
|
|
bool FFmpegDecoder::inputFrame_l(const Frame::Ptr &frame) {
|
|
if (_do_merger) {
|
|
return _merger.inputFrame(frame, [&](uint32_t dts, uint32_t pts, const Buffer::Ptr &buffer, bool have_idr) {
|
|
decodeFrame(buffer->data(), buffer->size(), dts, pts);
|
|
});
|
|
}
|
|
return decodeFrame(frame->data(), frame->size(), frame->dts(), frame->pts());
|
|
}
|
|
|
|
bool FFmpegDecoder::inputFrame(const Frame::Ptr &frame, bool may_async) {
|
|
if (!may_async || !TaskManager::isEnabled()) {
|
|
return inputFrame_l(frame);
|
|
}
|
|
auto frame_cache = Frame::getCacheAbleFrame(frame);
|
|
addDecodeTask(frame->keyFrame(), [this, frame_cache]() {
|
|
inputFrame_l(frame_cache);
|
|
//此处模拟解码太慢导致的主动丢帧
|
|
//usleep(100 * 1000);
|
|
});
|
|
return true;
|
|
}
|
|
|
|
bool FFmpegDecoder::decodeFrame(const char *data, size_t size, uint32_t dts, uint32_t pts) {
|
|
TimeTicker2(30, TraceL);
|
|
|
|
auto pkt = alloc_av_packet();
|
|
pkt->data = (uint8_t *) data;
|
|
pkt->size = size;
|
|
pkt->dts = dts;
|
|
pkt->pts = pts;
|
|
|
|
auto ret = avcodec_send_packet(_context.get(), pkt.get());
|
|
if (ret < 0) {
|
|
if (ret != AVERROR_INVALIDDATA) {
|
|
WarnL << "avcodec_send_packet failed:" << ffmpeg_err(ret);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
while (true) {
|
|
auto out_frame = std::make_shared<FFmpegFrame>();
|
|
ret = avcodec_receive_frame(_context.get(), out_frame->get());
|
|
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
|
|
break;
|
|
}
|
|
if (ret < 0) {
|
|
WarnL << "avcodec_receive_frame failed:" << ffmpeg_err(ret);
|
|
break;
|
|
}
|
|
if (pts - out_frame->get()->pts > MAX_DELAY_SECOND * 1000 && _ticker.createdTime() > 10 * 1000) {
|
|
//后面的帧才忽略,防止Track无法ready
|
|
WarnL << "解码时，忽略" << MAX_DELAY_SECOND << "秒前的数据:" << pts << " " << out_frame->get()->pts;
|
|
continue;
|
|
}
|
|
onDecode(out_frame);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void FFmpegDecoder::setOnDecode(FFmpegDecoder::onDec cb) {
|
|
_cb = std::move(cb);
|
|
}
|
|
|
|
void FFmpegDecoder::onDecode(const FFmpegFrame::Ptr &frame) {
|
|
if (_cb) {
|
|
_cb(frame);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
void TaskManager::pushExit(){
|
|
{
|
|
lock_guard<mutex> lck(_task_mtx);
|
|
_exit = true;
|
|
_task.clear();
|
|
_task.emplace_back([](){
|
|
throw ThreadExitException();
|
|
});
|
|
}
|
|
_sem.post(10);
|
|
}
|
|
|
|
void TaskManager::addEncodeTask(function<void()> task) {
|
|
{
|
|
lock_guard<mutex> lck(_task_mtx);
|
|
_task.emplace_back(std::move(task));
|
|
if (_task.size() > 30) {
|
|
WarnL << "encoder thread task is too more, now drop frame!";
|
|
_task.pop_front();
|
|
}
|
|
}
|
|
_sem.post();
|
|
}
|
|
|
|
void TaskManager::addDecodeTask(bool key_frame, function<void()> task) {
|
|
{
|
|
lock_guard<mutex> lck(_task_mtx);
|
|
if (_decode_drop_start) {
|
|
if (!key_frame) {
|
|
TraceL << "decode thread drop frame";
|
|
return;
|
|
}
|
|
_decode_drop_start = false;
|
|
InfoL << "decode thread stop drop frame";
|
|
}
|
|
|
|
_task.emplace_back(std::move(task));
|
|
if (_task.size() > 30) {
|
|
_decode_drop_start = true;
|
|
WarnL << "decode thread start drop frame";
|
|
}
|
|
}
|
|
_sem.post();
|
|
}
|
|
|
|
void TaskManager::startThread(const string &name) {
|
|
_thread.reset(new thread([this, name]() {
|
|
onThreadRun(name);
|
|
}), [this](thread *ptr) {
|
|
pushExit();
|
|
ptr->join();
|
|
delete ptr;
|
|
});
|
|
}
|
|
|
|
void TaskManager::stopThread() {
|
|
_thread = nullptr;
|
|
}
|
|
|
|
TaskManager::~TaskManager() {
|
|
stopThread();
|
|
}
|
|
|
|
bool TaskManager::isEnabled() const {
|
|
return _thread.operator bool();
|
|
}
|
|
|
|
void TaskManager::onThreadRun(const string &name) {
|
|
setThreadName(name.data());
|
|
function<void()> task;
|
|
_exit = false;
|
|
while (!_exit) {
|
|
_sem.wait();
|
|
{
|
|
unique_lock<mutex> lck(_task_mtx);
|
|
if (_task.empty()) {
|
|
continue;
|
|
}
|
|
task = _task.front();
|
|
_task.pop_front();
|
|
}
|
|
|
|
try {
|
|
TimeTicker2(50, TraceL);
|
|
task();
|
|
task = nullptr;
|
|
} catch (ThreadExitException &ex) {
|
|
break;
|
|
} catch (std::exception &ex) {
|
|
WarnL << ex.what();
|
|
continue;
|
|
}
|
|
}
|
|
InfoL << name << " exited!";
|
|
}
|