修复MP4解复用时不写入adts头的问题

src/Record/MP4Demuxer.cpp

@@ -160,6 +160,8 @@ struct Context{
     BufferRaw::Ptr buffer;
 };
 
+#define DATA_OFFSET ADTS_HEADER_LEN
+
 Frame::Ptr MP4Demuxer::readFrame(bool &keyFrame, bool &eof) {
     keyFrame = false;
     eof = false;
@@ -174,9 +176,9 @@ Frame::Ptr MP4Demuxer::readFrame(bool &keyFrame, bool &eof) {
     static mov_onalloc mov_onalloc = [](void *param, int bytes) -> void * {
         Context *ctx = (Context *) param;
         ctx->buffer = ctx->thiz->_buffer_pool.obtain();
-        ctx->buffer->setCapacity(bytes + 1);
-        ctx->buffer->setSize(bytes);
-        return ctx->buffer->data();
+        ctx->buffer->setCapacity(bytes + DATA_OFFSET + 1);
+        ctx->buffer->setSize(bytes + DATA_OFFSET);
+        return ctx->buffer->data() + DATA_OFFSET;
     };
 
     Context ctx = {this, 0};
@@ -204,11 +206,11 @@ template <typename Parent>
 class FrameWrapper : public Parent{
 public:
     ~FrameWrapper() = default;
-    FrameWrapper(const Buffer::Ptr &buf, int64_t pts, int64_t dts, int prefix) : Parent(buf->data(), buf->size(), dts, pts, prefix){
+    FrameWrapper(const Buffer::Ptr &buf, int64_t pts, int64_t dts, int prefix, int offset) : Parent(buf->data() + offset, buf->size() - offset, dts, pts, prefix){
         _buf = buf;
     }
 
-    FrameWrapper(CodecId codec,const Buffer::Ptr &buf, int64_t pts, int64_t dts, int prefix) : Parent(codec, buf->data(), buf->size(), dts, pts, prefix){
+    FrameWrapper(const Buffer::Ptr &buf, int64_t pts, int64_t dts, int prefix, int offset, CodecId codec) : Parent(codec, buf->data() + offset, buf->size() - offset, dts, pts, prefix){
         _buf = buf;
     }
 
@@ -224,37 +226,44 @@ Frame::Ptr MP4Demuxer::makeFrame(uint32_t track_id, const Buffer::Ptr &buf, int6
     if (it == _track_to_codec.end()) {
         return nullptr;
     }
-    auto numBytes = buf->size();
-    auto pBytes = buf->data();
+    auto bytes = buf->size() - DATA_OFFSET;
+    auto data = buf->data() + DATA_OFFSET;
     auto codec = it->second->getCodecId();
     switch (codec) {
         case CodecH264 :
         case CodecH265 : {
-            uint32_t iOffset = 0;
-            while (iOffset < numBytes) {
-                uint32_t iFrameLen;
-                memcpy(&iFrameLen, pBytes + iOffset, 4);
-                iFrameLen = ntohl(iFrameLen);
-                if (iFrameLen + iOffset + 4 > numBytes) {
+            uint32_t offset = 0;
+            while (offset < bytes) {
+                uint32_t frame_len;
+                memcpy(&frame_len, data + offset, 4);
+                frame_len = ntohl(frame_len);
+                if (frame_len + offset + 4 > bytes) {
                     return nullptr;
                 }
-                memcpy(pBytes + iOffset, "\x0\x0\x0\x1", 4);
-                iOffset += (iFrameLen + 4);
+                memcpy(data + offset, "\x0\x0\x0\x1", 4);
+                offset += (frame_len + 4);
             }
             if (codec == CodecH264) {
-                return std::make_shared<FrameWrapper<H264FrameNoCacheAble> >(buf, pts, dts, 4);
+                return std::make_shared<FrameWrapper<H264FrameNoCacheAble> >(buf, pts, dts, 4, DATA_OFFSET);
             }
-            return std::make_shared<FrameWrapper<H265FrameNoCacheAble> >(buf, pts, dts, 4);
+            return std::make_shared<FrameWrapper<H265FrameNoCacheAble> >(buf, pts, dts, 4, DATA_OFFSET);
+        }
+
+        case CodecAAC: {
+            AACTrack::Ptr track = dynamic_pointer_cast<AACTrack>(it->second);
+            assert(track);
+            //加上adts头
+            dumpAacConfig(track->getAacCfg(), buf->size() - DATA_OFFSET, (uint8_t *) buf->data() + (DATA_OFFSET - ADTS_HEADER_LEN), ADTS_HEADER_LEN);
+            return std::make_shared<FrameWrapper<FrameFromPtr> >(buf, pts, dts, ADTS_HEADER_LEN, DATA_OFFSET - ADTS_HEADER_LEN, codec);
         }
 
         case CodecOpus:
-        case CodecAAC:
         case CodecG711A:
         case CodecG711U: {
-            return std::make_shared<FrameWrapper<FrameFromPtr> >(codec, buf, pts, dts, 0);
+            return std::make_shared<FrameWrapper<FrameFromPtr> >(buf, pts, dts, 0, DATA_OFFSET, codec);
         }
-        default:
-            return nullptr;
+
+        default: return nullptr;
     }
 }