feat: 新增 Amlogic AMLENC 硬件编码支持

- 新增动态加载及 ABI 校验的 AMLENC H.264/H.265 编码器
- 注册 Amlogic 后端并扩展编码器自检
- 并行执行 MJPEG 解码与 AMLENC 编码
- 复用 NV12 缓冲区并移除冗余帧初始化
- 优化低延迟帧分发及 RTCP 关键帧恢复
- 动态调整 AMLENC 码率尚未完成，效果不佳

src/video/codec/self_check.rs

@@ -3,8 +3,8 @@ use std::sync::mpsc;
 use std::time::{Duration, Instant};
 
 use super::{
-    EncoderRegistry, H264Config, H264Encoder, H265Config, H265Encoder, VP8Config, VP8Encoder,
-    VP9Config, VP9Encoder, VideoEncoderType,
+    AmlencCodec, AmlencConfig, AmlencEncoder, EncoderRegistry, H264Config, H264Encoder, H265Config,
+    H265Encoder, VP8Config, VP8Encoder, VP9Config, VP9Encoder, VideoEncoderType,
 };
 use crate::error::{AppError, Result};
 use crate::video::format::{PixelFormat, Resolution};
@@ -226,6 +226,9 @@ fn run_smoke_test(
     resolution: Resolution,
     codec_name_ffmpeg: &str,
 ) -> Result<()> {
+    if codec_name_ffmpeg.contains("amlenc") {
+        return run_amlenc_smoke_test(codec, resolution);
+    }
     match codec {
         VideoEncoderType::H264 => run_h264_smoke_test(resolution, codec_name_ffmpeg),
         VideoEncoderType::H265 => run_h265_smoke_test(resolution, codec_name_ffmpeg),
@@ -234,6 +237,37 @@ fn run_smoke_test(
     }
 }
 
+fn run_amlenc_smoke_test(codec: VideoEncoderType, resolution: Resolution) -> Result<()> {
+    let amlenc_codec = match codec {
+        VideoEncoderType::H264 => AmlencCodec::H264,
+        VideoEncoderType::H265 => AmlencCodec::H265,
+        _ => {
+            return Err(AppError::VideoError(
+                "AMLENC only supports H.264 and H.265".to_string(),
+            ))
+        }
+    };
+    let mut encoder = AmlencEncoder::new(AmlencConfig {
+        codec: amlenc_codec,
+        resolution,
+        fps: 30,
+        bitrate_kbps: bitrate_kbps_for_resolution(resolution),
+        gop: 30,
+    })?;
+    let frame_len = PixelFormat::Nv12.frame_size(resolution).ok_or_else(|| {
+        AppError::VideoError("Cannot calculate AMLENC NV12 self-check size".to_string())
+    })?;
+    let frame = build_nv12_test_frame(resolution, frame_len);
+    for _ in 0..SELF_CHECK_FRAME_ATTEMPTS {
+        if encoder.encode_raw(&frame)?.is_some() {
+            return Ok(());
+        }
+    }
+    Err(AppError::VideoError(
+        "AMLENC produced no output after multiple frames".to_string(),
+    ))
+}
+
 fn run_h264_smoke_test(resolution: Resolution, codec_name_ffmpeg: &str) -> Result<()> {
     let mut encoder = H264Encoder::with_codec(
         H264Config::low_latency(resolution, bitrate_kbps_for_resolution(resolution)),