initial commit

Example/SellyCloudSDK/Live/AVVideoConfiguration.m

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+//
+//  AVVideoConfiguration.m
+//  AVDemo
+//
+
+#import "AVVideoConfiguration.h"
+
+@implementation AVVideoConfiguration
+
+#pragma mark - Initialization
+
+- (instancetype)init {
+    if (self = [super init]) {
+        // 初始化默认值
+        _nickname = @"";
+        _streamId = @"";
+        _codec = AVVideoCodeH264;
+    }
+    return self;
+}
+
+#pragma mark - Factory Methods
+
++ (instancetype)defaultConfiguration {
+    AVVideoConfiguration *config = [[AVVideoConfiguration alloc] init];
+    
+    // 生成随机昵称
+    NSInteger randomNum = arc4random_uniform(1000);
+    config.nickname = [NSString stringWithFormat:@"test%03ld", (long)randomNum];
+    
+    // 生成随机 streamId：stream + 3位随机数字
+    NSInteger streamRandomNum = 100 + arc4random_uniform(900); // 100-999
+    config.streamId = [NSString stringWithFormat:@"%ld", (long)streamRandomNum];
+    
+    config.codec = AVVideoCodeH264;
+    
+    // 设置默认分辨率为 720p
+    [config setResolution:AVVideoResolution360p];
+    
+    // 设置默认视频参数
+    config.videoFrameRate = 20;
+    config.videoMinFrameRate = 15;
+    config.videoMaxKeyframeInterval = 60; // 2x fps
+    
+    // 设置默认码率（kbps → bps）
+    config.videoBitRate = 2000 * 1000;      // 2000 kbps
+    config.videoMinBitRate = 500 * 1000;    // 500 kbps
+    
+    return config;
+}
+
++ (instancetype)configurationWithResolution:(AVVideoResolution)resolution {
+    AVVideoConfiguration *config = [self defaultConfiguration];
+    [config setResolution:resolution];
+    return config;
+}
+
+#pragma mark - Resolution Management
+
+- (void)setResolution:(AVVideoResolution)resolution {
+    // 默认：采集和输出使用相同分辨率
+    [self setCaptureResolution:resolution outputResolution:resolution];
+}
+
+- (void)setCaptureResolution:(AVVideoResolution)captureResolution
+            outputResolution:(AVVideoResolution)outputResolution {
+    // 设置输出分辨率（videoSize）
+    CGSize outputSize = AVVideoResolutionSize(outputResolution);
+    self.videoSize = outputSize;
+    
+    // 根据输出分辨率自动调整码率
+    [self adjustBitrateForResolution:outputResolution];
+}
+
+- (void)adjustBitrateForResolution:(AVVideoResolution)resolution {
+    NSUInteger maxBitrate, minBitrate;
+    
+    switch (resolution) {
+        case AVVideoResolution360p:
+            maxBitrate = 600;
+            minBitrate = 300;
+            break;
+        case AVVideoResolution480p:
+            maxBitrate = 900;
+            minBitrate = 400;
+            break;
+        case AVVideoResolution540p:
+            maxBitrate = 1500;
+            minBitrate = 500;
+            break;
+        case AVVideoResolution720p:
+            maxBitrate = 2000;
+            minBitrate = 800;
+            break;
+    }
+    
+    self.videoBitRate = maxBitrate * 1000;      // Convert kbps to bps
+    self.videoMinBitRate = minBitrate * 1000;   // Convert kbps to bps
+}
+
+- (AVVideoResolution)currentResolution {
+    // 返回输出分辨率
+    return [self currentOutputResolution];
+}
+
+- (AVVideoResolution)currentOutputResolution {
+    // 根据 videoSize 返回输出分辨率
+    CGSize size = self.videoSize;
+    
+    // 处理横屏和竖屏（统一为横屏比较）
+    CGFloat width = MAX(size.width, size.height);
+    CGFloat height = MIN(size.width, size.height);
+    
+    if (width == 640 && height == 360) {
+        return AVVideoResolution360p;
+    } else if (width == 854 && height == 480) {
+        return AVVideoResolution480p;
+    } else if (width == 960 && height == 540) {
+        return AVVideoResolution540p;
+    } else if (width == 1280 && height == 720) {
+        return AVVideoResolution720p;
+    }
+    
+    // 默认返回 720p
+    return AVVideoResolution720p;
+}
+
+#pragma mark - Convenience Accessors
+
+- (NSInteger)maxBitrateKbps {
+    return self.videoBitRate / 1000;
+}
+
+- (NSInteger)minBitrateKbps {
+    return self.videoMinBitRate / 1000;
+}
+
+#pragma mark - NSCopying
+
+- (id)copyWithZone:(NSZone *)zone {
+    // 调用父类的 copy 方法
+    AVVideoConfiguration *copy = [super copyWithZone:zone];
+    
+    // 复制自己的属性
+    copy.nickname = [self.nickname copy];
+    copy.streamId = [self.streamId copy];
+    copy.codec = self.codec;
+    
+    return copy;
+}
+
+#pragma mark - Description
+
+- (NSString *)description {
+    NSMutableString *desc = @"".mutableCopy;
+    [desc appendFormat:@"<AVVideoConfiguration: %p>\n", self];
+    [desc appendFormat:@"  nickname: %@\n", self.nickname];
+    [desc appendFormat:@"  streamId: %@\n", self.streamId];
+    [desc appendFormat:@"  codec: %@\n", AVVideoCodecString(self.codec)];
+    [desc appendFormat:@"  videoSize: %@\n", NSStringFromCGSize(self.videoSize)];
+    [desc appendFormat:@"  videoFrameRate: %lu\n", (unsigned long)self.videoFrameRate];
+    [desc appendFormat:@"  videoBitRate: %lu kbps\n", (unsigned long)(self.videoBitRate / 1000)];
+    [desc appendFormat:@"  videoMinBitRate: %lu kbps", (unsigned long)(self.videoMinBitRate / 1000)];
+    return desc;
+}
+
+@end