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fix:调整视频帧缓冲区逻辑计算逻辑，增加缓冲区最大大小至20帧

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This commit is contained in:
liyi 2025-04-08 16:43:11 +08:00
parent 5864b29055
commit 47b0a18ef3
1 changed files with 27 additions and 21 deletions
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48
lib/talk/starChart/views/talkView/talk_view_logic.dart
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@ -56,6 +56,9 @@ class TalkViewLogic extends BaseGetXController {
final Map<String, ui.Image> _imageCache = {};
// 添加一个变量用于记录上一帧的时间戳
int _lastFrameTimestamp = 0; // 初始值为 0
// 添加帧率计算相关变量
int _frameCount = 0;
int _lastFpsUpdateTime = 0;
@ -100,11 +103,11 @@ class TalkViewLogic extends BaseGetXController {
// 判断数据类型，进行分发处理
switch (contentType) {
case TalkData_ContentTypeE.G711:
// 第一帧到达时记录开始时间
if (_isFirstAudioFrame) {
_startAudioTime = currentTime;
_isFirstAudioFrame = false;
}
// // 第一帧到达时记录开始时间
// if (_isFirstAudioFrame) {
// _startAudioTime = currentTime;
// _isFirstAudioFrame = false;
// }
// 计算音频延迟
final expectedTime = _startAudioTime + talkData.durationMs;
@ -130,15 +133,16 @@ class TalkViewLogic extends BaseGetXController {
if (_isFirstFrame) {
_startTime = currentTime;
_isFirstFrame = false;
// AppLog.log('记录第一帧的时间戳${currentTime},${talkData.durationMs}');
AppLog.log('第一帧帧的时间戳：${talkData.durationMs}');
}
// AppLog.log('其他帧的时间戳：${talkData.durationMs}');
// 计算帧间间隔
if (_lastFrameTimestamp != 0) {
final int frameInterval = talkData.durationMs - _lastFrameTimestamp;
_adjustBufferSize(frameInterval); // 根据帧间间隔调整缓冲区
}
_lastFrameTimestamp = talkData.durationMs; // 更新上一帧时间戳
// 计算实际延迟：当前时间 - 预期播放时间
final expectedTime = _startTime + talkData.durationMs;
final videoDelay = currentTime - expectedTime; // 修改延迟计算方式
// 动态调整缓冲区
_adjustBufferSize(videoDelay);
// 然后添加到播放缓冲区
if (state.videoBuffer.length >= bufferSize) {
state.videoBuffer.removeAt(0);
@ -257,19 +261,21 @@ class TalkViewLogic extends BaseGetXController {
}
// 新增：动态调整缓冲区大小的方法
void _adjustBufferSize(int delay) {
const int delayThresholdHigh = 250; // 高延迟阈值（约3帧的时间）
const int delayThresholdLow = 166; // 低延迟阈值（约2帧的时间）
void _adjustBufferSize(int frameInterval) {
const int frameDuration = 83; // 假设每帧的时间间隔为 83ms（12fps）
const int delayThresholdHigh = frameDuration * 2; // 高延迟阈值（2帧时间）
const int delayThresholdLow = frameDuration; // 低延迟阈值（1帧时间）
const int adjustInterval = 1; // 每次调整1帧
if (delay > delayThresholdHigh && bufferSize < maxBufferSize) {
// 延迟较大，增加缓冲区
if (frameInterval > delayThresholdHigh && bufferSize < maxBufferSize) {
// 帧间间隔较大，增加缓冲区
bufferSize = min(bufferSize + adjustInterval, maxBufferSize);
// AppLog.log('📈 增加缓冲区 - 当前大小: $bufferSize, 延迟: ${delay}ms');
} else if (delay < delayThresholdLow && bufferSize > minBufferSize) {
// 延迟较小，减少缓冲区
AppLog.log('📈 增加缓冲区 - 当前大小: $bufferSize, 帧间间隔: ${frameInterval}ms');
} else if (frameInterval < delayThresholdLow &&
bufferSize > minBufferSize) {
// 帧间间隔较小，减少缓冲区
bufferSize = max(bufferSize - adjustInterval, minBufferSize);
// AppLog.log('📉 减少缓冲区 - 当前大小: $bufferSize, 延迟: ${delay}ms');
AppLog.log('📉 减少缓冲区 - 当前大小: $bufferSize, 帧间间隔: ${frameInterval}ms');
}
}