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decodec.cpp
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#include "decodec.h"
#include <chrono>
#include <cmath>
#include <sys/time.h>
#include <time.h>
extern "C"
{
#include "log.h"
}
#define MAX_AUDIO_FRAME_SIZE 96000 // 50 ms of 48khz 16-bit audio 2channel
/* Minimum SDL audio buffer size, in samples. */
#define SDL_AUDIO_MIN_BUFFER_SIZE 512
/* Calculate actual buffer size keeping in mind not cause too frequent audio
* callbacks */
#define SDL_AUDIO_MAX_CALLBACKS_PER_SEC 30
static void sdl_audio_callback(void *opaque, Uint8 *stream, int len);
#define AUDIOFRAME 8
#define VIDEOFRAME 8
// #define AV_NOSYNC_THRESHOLD 10.0
/* polls for possible required screen refresh at least this often, should be
* less than 1/fps */
#define REFRESH_RATE 20
/* no AV sync correction is done if below the minimum AV sync threshold */
#define AV_SYNC_THRESHOLD_MIN 40 // 40ms
/* AV sync correction is done if above the maximum AV sync threshold */
#define AV_SYNC_THRESHOLD_MAX 100 // 100ms
/* If a frame duration is longer than this, it will not be duplicated to
* compensate AV sync */
#define AV_SYNC_FRAMEDUP_THRESHOLD 40
/* no AV correction is done if too big error */
#define AV_NOSYNC_THRESHOLD 10000 // 10s
static FILE *file = fopen("log.txt", "wb+");
static void print_current_time_with_ms(std::string str);
Decodec::Decodec()
{
log_add_fp(file, LOG_TRACE);
dump_file_ = std::make_unique<FileDump>("decode_video.yuv");
audio_clock_ = std::make_unique<Clock>();
video_clock_ = std::make_unique<Clock>();
if (!(audio_frame_.frame = av_frame_alloc()))
{
log_error("Could not allocate audio audio_frame_\n");
}
// if (!(video_frame_ = av_frame_alloc())) {
// log_error("Could not allocate audio video_frame_\n");
// }
aduio_codec_info_ = (AVCodecParameters *)malloc(sizeof(AVCodecParameters));
video_codec_info_ = (AVCodecParameters *)malloc(sizeof(AVCodecParameters));
audio_decodec_ctx_ = nullptr;
video_decodec_ctx_ = nullptr;
audio_decodec_ = nullptr;
video_decodec_ = nullptr;
frame_timer = NAN;
mute_ = false;
volume_ = 100;
current_audio_clock_ = -1;
renderer_info_ = {0};
audio_callbacl_time_ = 0;
remaining_time_ = 0;
last_video_frame_.duration = NAN;
last_video_frame_.pts = NAN;
last_video_frame_.frame = nullptr;
frame_drops_late = 0;
player_state_ = PlayerState::PlayerState_Stop;
}
Decodec::~Decodec()
{
log_info("~Decodec in ");
log_info("SDL_Quit() IN audio_dev = %d",audio_dev);
//SDL_CloseAudioDevice(audio_dev);
log_info("SDL_Quit() OUT ");
audio_dev = 0;
log_info("~audio_decode_thread_ in ");
if (audio_decode_thread_->joinable())
{
audio_decode_thread_->join();
}
log_info("~audio_decode_thread_ out ");
log_info("~video_decode_thread_ in ");
if (video_decode_thread_->joinable())
{
video_decode_thread_->join();
}
log_info("~video_decode_thread_ out ");
log_info("~video_rendor_thread_ in ");
if (video_rendor_thread_->joinable())
{
video_rendor_thread_->join();
}
log_info("~video_rendor_thread_ out ");
free(aduio_codec_info_);
free(video_codec_info_);
// SDL_DestroyTexture(video_texture_);
// SDL_DestroyRenderer(renderer_);
// SDL_DestroyWindow(window_);
av_frame_free(&audio_frame_.frame);
// av_frame_free(&last_video_frame_);
// av_frame_free(&audio_frame_resample_);
fclose(file);
log_info("~Decodec out ");
}
void Decodec::set_player_state(PlayerState player_state)
{
log_debug("player state = %d\n", player_state);
player_state_ = player_state;
if (player_state_ == PlayerState::PlayerState_Play)
{
frame_timer += av_gettime_relative() / 1000 - video_clock_->last_updated_;
video_clock_->set_clock(video_clock_->get_clock(), 0);
set_mute(false);
}
else if (player_state_ == PlayerState::PlayerState_Pause)
{
set_mute(true);
} else if(player_state_ == PlayerState::PlayerState_Stop) {
log_info("SDL_CloseAudioDevice in ");
SDL_CloseAudioDevice(audio_dev);
log_info("SDL_CloseAudioDevice out");
}
video_clock_->paused_ = audio_clock_->paused_ =
video_clock_->pause_state_trans(player_state_);
}
PlayerState Decodec::get_player_state()
{
std::lock_guard<std::mutex> lck(mtx_);
return player_state_;
}
Ret Decodec::InitSDL()
{
sdl_flag_ = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
if (SDL_Init(sdl_flag_) < 0)
{
log_error("Could not initialize SDL - %s\n", SDL_GetError());
log_error("(Did you set the DISPLAY variable?)\n");
return Ret_ERROR;
}
// 使用QML不需要SDL显示 video
// if (InitVideoSDL() != Ret_OK)
// {
// log_error("init sdl video failed");
// return Ret_ERROR;
// }
#ifdef USE_VIDEO_SDL
video_rendor_thread_ =
std::make_unique<std::thread>(&Decodec::VideoRendor, this);
#endif
// video_rendor_thread_ =
// std::make_unique<std::thread>(&Decodec::VideoRendor0, this);
// InitAuido要在InitVideo之后执行具体原因不清楚
if (InitAudioSDL() != Ret_OK)
{
log_error("init sdl audio failed");
return Ret_ERROR;
}
return Ret_OK;
}
Ret Decodec::InitAudioSDL()
{
// ToDo 目前写死
want_audio_spec_.freq = 48000;
// want_audio_spec_.format = AV_SAMPLE_FMT_S16; // ffmpeg定义
want_audio_spec_.format = AUDIO_S16LSB; // SDL 定义
want_audio_spec_.channels = 2;
want_audio_spec_.silence = 0;
// want_audio_spec_.samples = 1024;
want_audio_spec_.samples = FFMAX(
SDL_AUDIO_MIN_BUFFER_SIZE,
2 << av_log2(want_audio_spec_.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
want_audio_spec_.callback = sdl_audio_callback;
want_audio_spec_.userdata = this;
int num = SDL_GetNumAudioDevices(0);
const char *deviceName = SDL_GetAudioDeviceName(num, 0);
if ((audio_dev = SDL_OpenAudioDevice(deviceName, 0, &want_audio_spec_, &spec_,
SDL_AUDIO_ALLOW_FREQUENCY_CHANGE)) < 2)
{
log_error("can't open audio.\n");
return Ret_ERROR;
}
SDL_PauseAudioDevice(audio_dev, 0);
bytes_per_sec = av_samples_get_buffer_size(
NULL, want_audio_spec_.channels, want_audio_spec_.freq,
TransforSDLFormattoFFmpeg(want_audio_spec_.format), 1);
log_debug("want_audio_spec_.samples = %d, spec.size = %d spec.samples = %d "
"bytes_per_sec = %d",
want_audio_spec_.samples, spec_.size, spec_.samples, bytes_per_sec);
return Ret_OK;
}
Ret Decodec::InitVideoSDL()
{
default_window_width_ = 640;
default_window_height_ = 480;
alwaysontop_ = false; // 始终置顶
borderless_ = false; // 无边框
window_ = nullptr;
#if SDL_VERSION_ATLEAST(2, 0, 5)
sdl_flag_ |= SDL_WINDOW_ALWAYS_ON_TOP;
#else
log_debug("Your SDL version doesn't support SDL_WINDOW_ALWAYS_ON_TOP.Feature "
"will be inactive");
#endif
if (borderless_)
sdl_flag_ |= SDL_WINDOW_BORDERLESS;
else
sdl_flag_ |= SDL_WINDOW_RESIZABLE;
window_ = SDL_CreateWindow("Big Fat Player", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, video_codec_info_->width,
video_codec_info_->height, SDL_WINDOW_SHOWN);
// 告诉 SDL 在渲染器缩放纹理时，使用线性插值方法进行过滤
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
if (window_)
{
// 创建renderer
renderer_ = SDL_CreateRenderer(
window_, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
if (!renderer_)
{
log_error("Failed to initialize a hardware accelerated renderer: %s\n",
SDL_GetError());
renderer_ = SDL_CreateRenderer(window_, -1, 0);
}
if (renderer_)
{
if (!SDL_GetRendererInfo(renderer_, &renderer_info_))
log_debug(NULL, AV_LOG_VERBOSE, "Initialized %s renderer.\n",
renderer_info_.name);
}
}
video_texture_ = SDL_CreateTexture(
renderer_, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING,
video_codec_info_->width, video_codec_info_->height);
if (!window_ || !renderer_ || !renderer_info_.num_texture_formats ||
!video_texture_)
{
log_error("Failed to create window or renderer: %s", SDL_GetError());
return Ret_ERROR;
}
return Ret_OK;
}
#if 0
void Decodec::VideoRendor0()
{
int ret = 0;
if (InitVideoSDL() != Ret_OK)
{
log_error("init sdl video failed");
// return Ret_ERROR;
}
while (1)
{
Frame *video_frame = (Frame *)video_frame_queue_->Pop();
// dump_file_->WriteVideoYUV420PData(video_frame);
if (video_frame)
{
ret = SDL_UpdateYUVTexture(
video_texture_, nullptr, video_frame->frame->data[0],
video_frame->frame->linesize[0], video_frame->frame->data[1],
video_frame->frame->linesize[1], video_frame->frame->data[2],
video_frame->frame->linesize[2]);
// SDL_UpdateTexture(video_texture_, NULL, video_frame->data[0],
// video_frame->linesize[0]);
if (ret < 0)
{
log_error("Failed to SDL_UpdateYUVTexture: %s", SDL_GetError());
}
ret = SDL_RenderClear(renderer_);
if (ret < 0)
{
log_error("Failed to SDL_RenderClear %s", SDL_GetError());
}
ret = SDL_RenderCopy(renderer_, video_texture_, nullptr, nullptr);
if (ret < 0)
{
log_error("Failed to render texture: %s", SDL_GetError());
}
SDL_RenderPresent(renderer_);
SDL_Delay(40); // 控制帧率大约为 25fps (1000ms / 25 = 40ms)
SDL_Event event;
SDL_PollEvent(&event);
if (event.type == SDL_QUIT)
{
av_frame_free(&video_frame->frame);
}
av_frame_free(&video_frame->frame);
delete video_frame;
}
}
}
#endif
void Decodec::Start_Video_Rendor() {
video_rendor_thread_ =
std::make_unique<std::thread>(&Decodec::VideoRendor, this);
}
void Decodec::VideoRendor()
{
// 使用QML显示不需要SDL
#ifdef USE_VIDEO_SDL
if (InitVideoSDL() != Ret_OK)
{
log_error("init sdl video failed");
// return Ret_ERROR;
}
#endif
while (1)
{
#ifndef USE_VIDEO_SDL
if (player_state_ == PlayerState::PlayerState_Stop)
{
log_info("PlayerState_Stop exit VideoRendor");
return;
}
#endif
if (remaining_time_ > 0.0)
{
av_usleep((int64_t)(remaining_time_ *
1000.0)); // remaining_time <= REFRESH_RATE
}
// remaining_time_ = REFRESH_RATE;
// dump_file_->WriteVideoYUV420PData(video_frame);
if(video_refresh() == Ret_ERROR) {
return ;
}
}
}
Ret Decodec::video_refresh()
{
Ret ret = Ret_OK;
log_debug("\n\n-----------------------------------");
print_current_time_with_ms("video_refresh in ");
double last_duration, duration, delay;
Frame *video_frame = (Frame *)video_frame_queue_->Peek(); // 读取带显示的帧
if(video_frame->eof ==1) {
log_info("video_refresh receive null_Frame exit\n");
ret = Ret_ERROR;
return ret;
}
last_duration = vp_duration(&last_video_frame_, video_frame);
delay = compute_target_delay(last_duration);
log_debug("video_pts = %0.3f last_duration = %0.3f delay = %0.3f\n",
video_frame->pts, last_duration, delay);
double time = av_gettime_relative() / 1000.0;
if (std::isnan(frame_timer))
{
frame_timer = time;
}
log_debug("frame_timer + delay - time = %0.3f", frame_timer + delay - time);
if (time < frame_timer + delay && time != frame_timer)
{
// 判断是否继续显示上一帧
// 当前系统时刻还未到达上一帧的结束时刻，那么还应该继续显示上一帧。
// 计算出最小等待时间
remaining_time_ = FFMIN(frame_timer + delay - time, REFRESH_RATE);
log_debug("remaining_time_ = %0.3f", remaining_time_);
video_display(last_video_frame_.frame);
return ret;
}
remaining_time_ = 0.0;
// 走到这一步，说明已经到了或过了该显示的时间，待显示帧vp的状态变更为当前要显示的帧
frame_timer += delay; // 更新当前帧播放时间
log_debug("delay = %0.3f frame_timer = %0.3f ftime = %0.3f diff = %0.3f\n",
delay, frame_timer, time, time - frame_timer);
if (delay > 0 && time - frame_timer > AV_SYNC_THRESHOLD_MAX)
{
frame_timer = time; // 如果和系统时间差距太大，就纠正为系统时间
}
if (!std::isnan(video_frame->pts))
{
video_clock_->set_clock(video_frame->pts, 0);
}
// 丢帧逻辑
if (video_frame_queue_->Size() > 1)
{
Frame *Next_Frame = (Frame *)video_frame_queue_->PeekNext();
duration = vp_duration(video_frame, Next_Frame);
if (time > frame_timer + duration)
{
frame_drops_late++;
log_debug(" frame_timer + duration - time:%0.3f, duration = %0.3f drop "
"frame = %d\n",
(frame_timer + duration) - time, duration, frame_drops_late);
video_frame = (Frame *)video_frame_queue_->Pop();
if (last_video_frame_.frame != nullptr)
{
av_frame_free(
&last_video_frame_.frame); // 在clone新的数据之前需要释放掉之前的
}
last_video_frame_.frame = av_frame_clone(video_frame->frame);
last_video_frame_.pts = video_frame->pts;
last_video_frame_.duration = video_frame->duration;
av_frame_free(&video_frame->frame);
delete video_frame;
return ret ;
}
}
video_frame = (Frame *)video_frame_queue_->Pop();
video_display(video_frame->frame);
if (last_video_frame_.frame != nullptr)
{
av_frame_free(
&last_video_frame_.frame); // 在clone新的数据之前需要释放掉之前的
}
// 克隆当前帧数据
last_video_frame_.frame = av_frame_clone(video_frame->frame);
last_video_frame_.pts = video_frame->pts;
last_video_frame_.duration = video_frame->duration;
av_frame_free(&video_frame->frame);
delete video_frame;
print_current_time_with_ms("video_refresh out ");
}
double Decodec::compute_target_delay(double delay)
{
double sync_threshold, diff = 0;
double video_pts = video_clock_->get_clock();
double audio_pts = audio_clock_->get_clock();
log_debug("delay = %0.3f video_clock_->get_clock = %0.3f "
"audio_clock_->get_clock = %0.3f\n",
delay, video_pts, audio_pts);
diff = video_pts - audio_pts;
/* skip or repeat frame. We take into account the
delay to compute the threshold. I still don't know
if it is the best guess */
sync_threshold =
FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
if (!std::isnan(diff))
{
if (diff < -sync_threshold) // 视频已经落后
{
delay = FFMAX(0, delay + diff); // 上一帧持续的时间往小的方向去调整
}
else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
{
// delay = 0.2秒
// diff = 1秒
// delay = 0.2 + 1 = 1.2
// 视频超前
// AV_SYNC_FRAMEDUP_THRESHOLD是0.1，此时如果delay>0.1,
// 如果2*delay时间就有点久
delay = delay + diff; // 上一帧持续时间往大的方向去调整
// log_debug( "video: delay=%0.3f A-V=%f\n",
// delay, -diff);
}
else if (diff >= sync_threshold)
{
// 上一帧持续时间往大的方向去调整
// delay = 0.2 *2 = 0.4
delay =
2 *
delay; // 保持在 2 * AV_SYNC_FRAMEDUP_THRESHOLD内, 即是2*0.1 = 0.2秒内
// delay = delay + diff; //
// 上一帧持续时间往大的方向去调整
}
else
{
// 音视频同步精度在 -sync_threshold ~ +sync_threshold
// 其他条件就是 delay = delay; 维持原来的delay,
// 依靠frame_timer+duration和当前时间进行对比
}
}
log_debug("video: delay=%0.3f A-V=%f\n", delay, -diff);
return delay;
}
double Decodec::vp_duration(Frame *vp, Frame *nextvp)
{
double duration = 0;
log_debug("nextvp->pts = %0.3f,vp->pts = %0.3f\n", nextvp->pts, vp->pts);
if (vp != nullptr && !std::isnan(vp->pts))
{
duration = nextvp->pts - vp->pts;
if (std::isnan(duration) || duration <= 0)
{
// log_debug("duration2 = %0.3f",vp->duration);
return vp->duration;
}
else
{
return duration;
}
}
else
{
return nextvp->duration; // 第一帧情况
}
}
void print_current_time_with_ms(std::string str)
{
struct timeval tv;
gettimeofday(&tv, NULL); // 获取当前时间
// 获取秒和微秒，并计算毫秒
time_t seconds = tv.tv_sec;
struct tm *timeinfo = localtime(&seconds);
int milliseconds = tv.tv_usec / 1000;
// 格式化时间并打印
log_debug("%s: \"%02d:%02d:%02d.%03d\",\n", str.c_str(), timeinfo->tm_hour,
timeinfo->tm_min, timeinfo->tm_sec, milliseconds);
}
void Decodec::video_display(AVFrame *video_frame)
{
print_current_time_with_ms("video_display");
#ifdef USE_VIDEO_SDL
if (video_frame)
{
int ret = 0;
ret = SDL_UpdateYUVTexture(video_texture_, nullptr, video_frame->data[0],
video_frame->linesize[0], video_frame->data[1],
video_frame->linesize[1], video_frame->data[2],
video_frame->linesize[2]);
// print_current_time_with_ms("SDL_UpdateYUVTexture");
if (ret < 0)
{
log_error("Failed to SDL_UpdateYUVTexture: %s", SDL_GetError());
}
ret = SDL_RenderClear(renderer_);
if (ret < 0)
{
log_error("Failed to SDL_RenderClear %s", SDL_GetError());
}
// print_current_time_with_ms("SDL_RenderClear");
ret = SDL_RenderCopy(renderer_, video_texture_, nullptr, nullptr);
if (ret < 0)
{
log_error("Failed to render texture: %s", SDL_GetError());
}
// print_current_time_with_ms("SDL_RenderCopy");
SDL_RenderPresent(renderer_);
// SDL_Delay(40); // 控制帧率大约为 25fps (1000ms / 25 = 40ms)
// print_current_time_with_ms("SDL_RenderPresent");
SDL_Event event;
SDL_PollEvent(&event);
if (event.type == SDL_QUIT)
{
}
// print_current_time_with_ms("SDL_PollEvent");
}
#else
write_yuv_data_cb_(video_frame);
#endif
}
void Decodec::set_audio_timebase(AVRational tb) { audio_tb_ = tb; }
void Decodec::set_video_timebase(AVRational tb) { video_tb_ = tb; }
void Decodec::set_video_frame_rate(AVRational frame_rate)
{
video_frame_rate_ = frame_rate;
}
Ret Decodec::Init()
{
Ret ret = Ret_OK;
audio_frame_queue_ = std::make_shared<PacketQueue>(AUDIOFRAME, "audioframe");
audio_ringbuf_ = std::make_shared<RingBuffer>(MAX_AUDIO_FRAME_SIZE);
video_frame_queue_ = std::make_shared<PacketQueue>(VIDEOFRAME, "vidoeframe");
ret = InitAudio();
ret = InitVideo();
if (InitSDL() != Ret_OK)
{
log_error("init sdl failed");
}
audio_resample_ = std::make_unique<AudioReSample>();
audio_resample_->Init(
aduio_codec_info_->sample_rate,
av_get_channel_layout_nb_channels(aduio_codec_info_->channel_layout),
(AVSampleFormat)aduio_codec_info_->format, want_audio_spec_.freq,
want_audio_spec_.channels,
TransforSDLFormattoFFmpeg((AVSampleFormat)want_audio_spec_.format));
return ret;
}
void Decodec::setAudioQueue(std::shared_ptr<PacketQueue> pkt_queue)
{
audio_pkt_queue_ = std::move(pkt_queue);
}
void Decodec::setVideoQueue(std::shared_ptr<PacketQueue> pkt_queue)
{
video_pkt_queue_ = std::move(pkt_queue);
}
Ret Decodec::setVolume(int volume) { return Ret_OK; }
void Decodec::StartDecode()
{
// DumpAudioCodecInfo();
video_decode_thread_ =
std::make_unique<std::thread>(&Decodec::VideoThread, this);
audio_decode_thread_ =
std::make_unique<std::thread>(&Decodec::AudioThread, this);
}
void Decodec::PushNullFrame() {
video_frame_queue_->Clear();
Frame *video_null_frame = new Frame();
video_null_frame->eof = 1;
video_null_frame->frame = av_frame_alloc();
video_frame_queue_->Push(video_null_frame);
audio_frame_queue_->Clear();
Frame *audio_null_frame = new Frame();
audio_null_frame->eof = 1;
audio_null_frame->frame = av_frame_alloc();
audio_frame_queue_->Push(audio_null_frame);
}
void Decodec::VideoThread()
{
PlayerState temp;
while (1)
{
if (player_state_ == PlayerState::PlayerState_Stop)
{
log_info("PlayerState_Stop exit VideoThread\n");
return;
}
if (get_player_state() == PlayerState::PlayerState_Pause)
{
// std::this_thread::sleep_for(std::chrono::milliseconds(20));
continue;
}
AVPacket *video_pkt = (AVPacket *)video_pkt_queue_->Pop();
if(video_pkt->data == nullptr) {
log_info("video Thread exit\n");
av_packet_free(&video_pkt);
//PushNullFrame();
return;
}
DecodeVideo(video_pkt);
av_packet_free(&video_pkt);
}
}
Ret Decodec::DecodeVideo(AVPacket *video_pkt)
{
int ret = avcodec_send_packet(video_decodec_ctx_, video_pkt);
if (ret < 0)
{
log_error("Failed to send packet to decoder\n");
return Ret_ERROR;
}
/* read all the output frames (in general there may be any number of them */
while (ret >= 0)
{
Frame *video_frame = new Frame();
video_frame->eof = 0;
if (!(video_frame->frame = av_frame_alloc()))
{
log_error("Could not allocate audio video_frame_\n");
}
ret = avcodec_receive_frame(video_decodec_ctx_, video_frame->frame);
if (video_frame)
{
if (video_frame->frame->pts != AV_NOPTS_VALUE)
{
video_frame->pts =
(double)video_frame->frame->pts * av_q2d(video_tb_) * 1000;
// 有的码流 没有pkt_duration
// video_frame->duration = (double)av_q2d(video_tb_) * 1000 *
// video_frame->frame->pkt_duration;
video_frame->duration =
av_q2d((AVRational){video_frame_rate_.den, video_frame_rate_.num}) *
1000;
// log_debug("duration3 = %0.3f",video_frame->duration);
double diff = video_frame->pts - audio_clock_->get_clock();
// if (!std::isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD)
// {
// av_frame_unref(video_frame->frame);
// delete video_frame;
// continue;
// }
}
}
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
{
av_frame_unref(video_frame->frame);
delete video_frame;
return Ret_ERROR;
}
else if (ret < 0)
{
log_error("Error during decoding\n");
av_frame_unref(video_frame->frame);
delete video_frame;
return Ret_ERROR;
}
video_frame_queue_->Push(video_frame);
//dump_file_->WriteVideoYUV420PData(video_frame->frame);
}
}
void Decodec::AudioThread()
{
// std::this_thread::sleep_for(std::chrono::microseconds(200));
while (1)
{
if (player_state_ == PlayerState::PlayerState_Stop)
{
log_info("PlayerState_Stop exit AudioThread");
return;
}
if (get_player_state() == PlayerState::PlayerState_Pause)
{
// std::this_thread::sleep_for(std::chrono::milliseconds(20));
continue;
}
AVPacket *audio_pkt = (AVPacket *)audio_pkt_queue_->Pop();
// dump_file_->WriteBitStream(audio_pkt,
// audio_pkt->size,audio_decodec_ctx_->codec_id);
if(audio_pkt->data == nullptr) {
log_info("AudioThread exit");
av_packet_free(&audio_pkt);
return;
}
DecodeAudio(audio_pkt);
av_packet_free(&audio_pkt);
}
}
Ret Decodec::DecodeAudio(AVPacket *audio_pkt)
{
int ret = avcodec_send_packet(audio_decodec_ctx_, audio_pkt);
if (ret < 0)
{
log_error("Failed to send packet to decoder\n");
return Ret_ERROR;
}
int data_size = 0;
int channel_index = 0;
/* read all the output frames (in general there may be any number of them */
while (ret >= 0)
{
// 解析出来的是32bit float planar 小端数据
ret = avcodec_receive_frame(audio_decodec_ctx_, audio_frame_.frame);
// if (ret >= 0) {
// AVRational tb = (AVRational){1, audio_frame_.frame->sample_rate}; //
// if (audio_frame_.frame->pts != AV_NOPTS_VALUE) {
// // 如果frame->pts正常则先将其从pkt_timebase转成{1,
// frame->sample_rate}
// // pkt_timebase实质就是stream->time_base
// audio_frame_.frame->pts = av_rescale_q(audio_frame_.frame->pts,
// video_tb_, tb);
// }
// }
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return Ret_ERROR;
else if (ret < 0)
{
log_error("Error during decoding\n");
return Ret_ERROR;
}
data_size = av_get_bytes_per_sample(audio_decodec_ctx_->sample_fmt);
if (data_size < 0)
{
/* This should not occur, checking just for paranoia */
log_error("Failed to calculate data size\n");
return Ret_ERROR;
}
// dump_file_->WritePcmPlanarData(audio_frame_.data, data_size);
// log_debug("audio_frame nb_samples = %d", audio_frame_.nb_samples);
Frame *audio_frame_resample_ = new Frame();
if (audio_frame_resample_ != nullptr)
{
if (!(audio_frame_resample_->frame = AllocOutFrame()))
{
log_error("Could not allocate audio audio_frame_resample_\n");
}
}
else
{
log_error("Could not allocate audio_frame_resample_");
return Ret_ERROR;
}
// // audio_frame_resample_是resample之后的数据，
int resample_sample_number = audio_resample_->audio_resampler_send_frame(
audio_frame_.frame, audio_frame_resample_->frame);
// dump_file_->WritePcmData(audio_frame_resample_->extended_data,
// resample_sample_number * 2 * 2);
// audio_ringbuf_->push(audio_frame_resample_->extended_data[0],
// resample_sample_number * 2 * 2);
// std::vector<uint8_t> temp = audio_ringbuf_->pop(resample_sample_number *
// 2 *1.5); //for test
// dump_file_->WritePcmData(temp.data(),temp.size());
log_info("audio_thread push in ");
audio_frame_queue_->Push(audio_frame_resample_);
log_info("audio_thread push out ");
}
}
int Decodec::get_audio_decode_frame()
{
Frame *temp_frame = (Frame *)audio_frame_queue_->Pop();
if(temp_frame->eof ==1) {
log_info("audio sdl receive null frame \n");
return 0;
}
// printf("temp_frame_pts = %lld temp_frame_nb_sample = %ld\n",
// temp_frame->pts, temp_frame->nb_samples);
int frame_size = av_samples_get_buffer_size(
NULL, temp_frame->frame->channels, temp_frame->frame->nb_samples,
(AVSampleFormat)temp_frame->frame->format, 1);
audio_ringbuf_->push(temp_frame->frame->extended_data[0], frame_size);
if (temp_frame)
{ // 注意要根据AVStream或者AVCodecContext中的time_base来计算pts
// 不能使用sample_rate来计算。因为有的audio
// pts不是根据sample_rate传输的
// audio_tb_ = (AVRational){
// 1000, temp_frame->frame->sample_rate}; /
temp_frame->pts = (double)temp_frame->frame->pts * av_q2d(audio_tb_) * 1000;
log_debug("temp_frame->frame->pts = %lld temp_frame_pts = %0.3f "
"temp_frame_nb_sample = %ld\n",
temp_frame->frame->pts, temp_frame->pts,
temp_frame->frame->nb_samples);
}
double current_frame_duration_time =
((double)temp_frame->frame->nb_samples /
audio_resample_->get_reframe_samplerate()) *
1000;
/* update the audio clock with the pts */
if (temp_frame->pts > 0)
{
// 当前frame的pts加上持续的播放时间
current_audio_clock_ = temp_frame->pts + current_frame_duration_time;
}
else
{
current_audio_clock_ = -1;
}
#ifdef DEBUG
{
static double last_clock = 0;
printf("audio: delay=%3f clock=%3f current_frame_duration_time = %3f\n",
current_audio_clock_ - last_clock, current_audio_clock_,
current_frame_duration_time);
last_clock = current_audio_clock_;
}
#endif
av_frame_free(&temp_frame->frame);
delete (temp_frame);
return frame_size;
}
AVFrame *Decodec::AllocOutFrame()
{
int ret;
AVFrame *frame = av_frame_alloc();
if (!frame)
{
return NULL;
}
// frame->nb_samples = want_audio_spec_.samples;
frame->nb_samples =
2048; // 临时设置因为不清楚resample之后的nb_sample，先设置一个较大的nb_sample
frame->channel_layout =
av_get_default_channel_layout(want_audio_spec_.channels);
frame->format = TransforSDLFormattoFFmpeg(want_audio_spec_.format);
frame->sample_rate = want_audio_spec_.freq;
ret = av_frame_get_buffer(frame, 0);
if (ret < 0)
{
log_error("cannot allocate audio data buffer\n");
return NULL;
}
return frame;
}
Ret Decodec::setAudioAvCodecInfo(AVCodecParameters *dec)
{
if (aduio_codec_info_ == nullptr && dec == nullptr)
{
return Ret_ERROR;
}
memcpy(aduio_codec_info_, dec, sizeof(AVCodecParameters));
return Ret_OK;
}
Ret Decodec::setVideoAvCodecInfo(AVCodecParameters *dec)
{
if (video_codec_info_ == nullptr && dec == nullptr)
{
return Ret_ERROR;
}
memcpy(video_codec_info_, dec, sizeof(AVCodecParameters));
return Ret_OK;
}
void Decodec::DumpAudioCodecInfo()
{
log_debug("\n----- Audio info:\n");
// sample_rate: 音频编解码器的采样率，单位为Hz
log_debug("samplerate:%dHz\n", aduio_codec_info_->sample_rate);
// channels: 音频通道数，单声道为1，双声道为2，5.1声道为6
log_debug("channels:%d\n", aduio_codec_info_->channels);
// channel_layout:
// 音频通道布局，用于描述音频通道的布局，例如立体声为2个通道，左声道为1，右声道为2
log_debug("channel_layout:%d\n", aduio_codec_info_->channel_layout);
// codec_type: 音频编解码器的类型，通常为AVMEDIA_TYPE_AUDIO
log_debug("codec_type:%d\n", aduio_codec_info_->codec_type);
}
void Decodec::DumpvideoCodecInfo()
{
log_debug("\n----- Video info:\n");
// index: 每个流成分在ffmpeg解复用分析后都有唯一的index作为标识
}
Ret Decodec::InitAudio()
{
/* find decoder for the stream */
audio_decodec_ = avcodec_find_decoder(aduio_codec_info_->codec_id);
if (!audio_decodec_)
{
log_error("Failed to find %s codec\n",
av_get_media_type_string(aduio_codec_info_->codec_type));
return Ret_ERROR;
}
/* Allocate a codec context for the decoder */
audio_decodec_ctx_ = avcodec_alloc_context3(audio_decodec_);
if (!audio_decodec_ctx_)
{
log_error("Failed to allocate the %s codec context\n",
av_get_media_type_string(aduio_codec_info_->codec_type));
return Ret_ERROR;
}
/* Copy codec parameters from input stream to output codec context */
if (avcodec_parameters_to_context(audio_decodec_ctx_, aduio_codec_info_) <
0)
{
log_error("Failed to copy %s codec parameters to decoder context\n",
av_get_media_type_string(aduio_codec_info_->codec_type));
return Ret_ERROR;
}
/* Init the decoders, with or without reference counting */
// av_dict_set(&opts, "refcounted_frames", refcount ? "1" : "0", 0);
if (avcodec_open2(audio_decodec_ctx_, audio_decodec_, nullptr) < 0)
{
log_error("Failed to open %s codec\n",
av_get_media_type_string(aduio_codec_info_->codec_type));
return Ret_ERROR;
}
}
Ret Decodec::InitVideo()
{
/* find decoder for the stream */
video_decodec_ = avcodec_find_decoder(video_codec_info_->codec_id);
if (!video_decodec_)
{
log_error("Failed to find %s codec\n",
av_get_media_type_string(video_codec_info_->codec_type));
return Ret_ERROR;
}
/* Allocate a codec context for the decoder */
video_decodec_ctx_ = avcodec_alloc_context3(video_decodec_);
if (!video_decodec_ctx_)