refine code, use decoder to parse flv stream

@@ -36,6 +36,7 @@ using namespace std;
 #include <srs_app_http.hpp>
 #include <srs_app_http_conn.hpp>
 #include <srs_core_autofree.hpp>
+#include <srs_kernel_flv.hpp>
 
 #define SRS_HTTP_FLV_STREAM_BUFFER 4096
 
@@ -92,6 +93,13 @@ int SrsAppCasterFlv::serve_http(ISrsHttpResponseWriter* w, SrsHttpMessage* r)
     SrsAutoFree(char, buffer);
     
     ISrsHttpResponseReader* rr = r->body_reader();
+    SrsHttpFileReader reader(rr);
+    SrsFlvDecoder dec;
+    
+    if ((ret = dec.initialize(&reader)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
     while (!rr->eof()) {
         int nb_read = 0;
         if ((ret = rr->read(buffer, SRS_HTTP_FLV_STREAM_BUFFER, &nb_read)) != ERROR_SUCCESS) {
@@ -118,4 +126,68 @@ int SrsDynamicHttpConn::on_got_http_message(SrsHttpMessage* msg)
     return ret;
 }
 
+SrsHttpFileReader::SrsHttpFileReader(ISrsHttpResponseReader* h)
+{
+    http = h;
+}
+
+SrsHttpFileReader::~SrsHttpFileReader()
+{
+}
+
+int SrsHttpFileReader::open(std::string /*file*/)
+{
+    return ERROR_SUCCESS;
+}
+
+void SrsHttpFileReader::close()
+{
+}
+
+bool SrsHttpFileReader::is_open()
+{
+    return false;
+}
+
+int64_t SrsHttpFileReader::tellg()
+{
+    return 0;
+}
+
+void SrsHttpFileReader::skip(int64_t /*size*/)
+{
+}
+
+int64_t SrsHttpFileReader::lseek(int64_t offset)
+{
+    return offset;
+}
+
+int64_t SrsHttpFileReader::filesize()
+{
+    return 0;
+}
+
+int SrsHttpFileReader::read(void* buf, size_t count, ssize_t* pnread)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (http->eof()) {
+        ret = ERROR_HTTP_REQUEST_EOF;
+        srs_error("flv: encoder EOF. ret=%d", ret);
+        return ret;
+    }
+    
+    int nread = 0;
+    if ((ret = http->read((char*)buf, (int)count, &nread)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    if (pnread) {
+        *pnread = nread;
+    }
+    
+    return ret;
+}
+
 #endif

@@ -44,7 +44,11 @@ class SrsHttpConn;
 #include <srs_app_conn.hpp>
 #include <srs_app_http.hpp>
 #include <srs_app_http_conn.hpp>
+#include <srs_kernel_file.hpp>
 
+/**
+ * the stream caster for flv stream over HTTP POST.
+ */
 class SrsAppCasterFlv : virtual public ISrsTcpHandler
     , virtual public IConnectionManager, virtual public ISrsHttpHandler
 {
@@ -68,6 +72,9 @@ public:
     virtual int serve_http(ISrsHttpResponseWriter* w, SrsHttpMessage* r);
 };
 
+/**
+ * the dynamic http connection, never drop the body.
+ */
 class SrsDynamicHttpConn : public SrsHttpConn
 {
 public:
@@ -77,6 +84,38 @@ public:
     virtual int on_got_http_message(SrsHttpMessage* msg);
 };
 
+/**
+ * the http wrapper for file reader,
+ * to read http post stream like a file.
+ */
+class SrsHttpFileReader : public SrsFileReader
+{
+private:
+    ISrsHttpResponseReader* http;
+public:
+    SrsHttpFileReader(ISrsHttpResponseReader* h);
+    virtual ~SrsHttpFileReader();
+public:
+    /**
+     * open file reader, can open then close then open...
+     */
+    virtual int open(std::string file);
+    virtual void close();
+public:
+    // TODO: FIXME: extract interface.
+    virtual bool is_open();
+    virtual int64_t tellg();
+    virtual void skip(int64_t size);
+    virtual int64_t lseek(int64_t offset);
+    virtual int64_t filesize();
+public:
+    /**
+     * read from file.
+     * @param pnread the output nb_read, NULL to ignore.
+     */
+    virtual int read(void* buf, size_t count, ssize_t* pnread);
+};
+
 #endif
 
 #endif

@@ -255,6 +255,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_HTTP_INVALID_CHUNK_HEADER     4026
 #define ERROR_AVC_NALU_UEV                  4027
 #define ERROR_AAC_BYTES_INVALID             4028
+#define ERROR_HTTP_REQUEST_EOF             4029
 
 ///////////////////////////////////////////////////////
 // user-define error.