for #293, add http stream cache for audio mp3/aac stream.

@@ -140,6 +140,36 @@ int SrsVodStream::serve_flv_stream(ISrsGoHttpResponseWriter* w, SrsHttpMessage*
     return ret;
 }
 
+SrsStreamCache::SrsStreamCache(SrsSource* s)
+{
+    source = s;
+    pthread = new SrsThread("http-stream", 
+        this, SRS_CONSTS_RTMP_PULSE_TIMEOUT_US, false);
+}
+
+SrsStreamCache::~SrsStreamCache()
+{
+    pthread->stop();
+    srs_freep(pthread);
+}
+
+int SrsStreamCache::start()
+{
+    return pthread->start();
+}
+
+int SrsStreamCache::dump_cache(SrsConsumer* consumer)
+{
+    int ret = ERROR_SUCCESS;
+    return ret;
+}
+
+int SrsStreamCache::cycle()
+{
+    int ret = ERROR_SUCCESS;
+    return ret;
+}
+
 ISrsStreamEncoder::ISrsStreamEncoder()
 {
 }
@@ -158,7 +188,7 @@ SrsFlvStreamEncoder::~SrsFlvStreamEncoder()
     srs_freep(enc);
 }
 
-int SrsFlvStreamEncoder::initialize(SrsFileWriter* w)
+int SrsFlvStreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* /*c*/)
 {
     int ret = ERROR_SUCCESS;
     
@@ -189,9 +219,22 @@ int SrsFlvStreamEncoder::write_metadata(int64_t timestamp, char* data, int size)
     return enc->write_metadata(timestamp, data, size);
 }
 
+bool SrsFlvStreamEncoder::has_cache()
+{
+    // for flv stream, use gop cache of SrsSource is ok.
+    return false;
+}
+
+int SrsFlvStreamEncoder::dump_cache(SrsConsumer* /*consumer*/)
+{
+    // for flv stream, ignore cache.
+    return ERROR_SUCCESS;
+}
+
 SrsAacStreamEncoder::SrsAacStreamEncoder()
 {
     enc = new SrsAacEncoder();
+    cache = NULL;
 }
 
 SrsAacStreamEncoder::~SrsAacStreamEncoder()
@@ -199,10 +242,12 @@ SrsAacStreamEncoder::~SrsAacStreamEncoder()
     srs_freep(enc);
 }
 
-int SrsAacStreamEncoder::initialize(SrsFileWriter* w)
+int SrsAacStreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* c)
 {
     int ret = ERROR_SUCCESS;
     
+    cache = c;
+    
     if ((ret = enc->initialize(w)) != ERROR_SUCCESS) {
         return ret;
     }
@@ -227,9 +272,21 @@ int SrsAacStreamEncoder::write_metadata(int64_t /*timestamp*/, char* /*data*/, i
     return ERROR_SUCCESS;
 }
 
+bool SrsAacStreamEncoder::has_cache()
+{
+    return true;
+}
+
+int SrsAacStreamEncoder::dump_cache(SrsConsumer* consumer)
+{
+    srs_assert(cache);
+    return cache->dump_cache(consumer);
+}
+
 SrsMp3StreamEncoder::SrsMp3StreamEncoder()
 {
     enc = new SrsMp3Encoder();
+    cache = NULL;
 }
 
 SrsMp3StreamEncoder::~SrsMp3StreamEncoder()
@@ -237,10 +294,12 @@ SrsMp3StreamEncoder::~SrsMp3StreamEncoder()
     srs_freep(enc);
 }
 
-int SrsMp3StreamEncoder::initialize(SrsFileWriter* w)
+int SrsMp3StreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* c)
 {
     int ret = ERROR_SUCCESS;
     
+    cache = c;
+    
     if ((ret = enc->initialize(w)) != ERROR_SUCCESS) {
         return ret;
     }
@@ -269,6 +328,17 @@ int SrsMp3StreamEncoder::write_metadata(int64_t /*timestamp*/, char* /*data*/, i
     return ERROR_SUCCESS;
 }
 
+bool SrsMp3StreamEncoder::has_cache()
+{
+    return true;
+}
+
+int SrsMp3StreamEncoder::dump_cache(SrsConsumer* consumer)
+{
+    srs_assert(cache);
+    return cache->dump_cache(consumer);
+}
+
 SrsStreamWriter::SrsStreamWriter(ISrsGoHttpResponseWriter* w)
 {
     writer = w;
@@ -305,9 +375,10 @@ int SrsStreamWriter::write(void* buf, size_t count, ssize_t* pnwrite)
     return writer->write((char*)buf, (int)count);
 }
 
-SrsLiveStream::SrsLiveStream(SrsSource* s, SrsRequest* r)
+SrsLiveStream::SrsLiveStream(SrsSource* s, SrsRequest* r, SrsStreamCache* c)
 {
     source = s;
+    cache = c;
     req = r->copy();
 }
 
@@ -339,9 +410,9 @@ int SrsLiveStream::serve_http(ISrsGoHttpResponseWriter* w, SrsHttpMessage* r)
     }
     SrsAutoFree(ISrsStreamEncoder, enc);
     
-    // create consumer of souce.
+    // create consumer of souce, ignore gop cache, use the audio gop cache.
     SrsConsumer* consumer = NULL;
-    if ((ret = source->create_consumer(consumer)) != ERROR_SUCCESS) {
+    if ((ret = source->create_consumer(consumer, !enc->has_cache())) != ERROR_SUCCESS) {
         srs_error("http: create consumer failed. ret=%d", ret);
         return ret;
     }
@@ -353,9 +424,18 @@ int SrsLiveStream::serve_http(ISrsGoHttpResponseWriter* w, SrsHttpMessage* r)
     
     // the memory writer.
     SrsStreamWriter writer(w);
-    if ((ret = enc->initialize(&writer)) != ERROR_SUCCESS) {
+    if ((ret = enc->initialize(&writer, cache)) != ERROR_SUCCESS) {
+        srs_error("http: initialize stream encoder failed. ret=%d", ret);
+        return ret;
+    }
+    
+    // if gop cache enabled for encoder, dump to consumer.
+    if (enc->has_cache()) {
+        if ((ret = enc->dump_cache(consumer)) != ERROR_SUCCESS) {
+            srs_error("http: dump cache to consumer failed. ret=%d", ret);
             return ret;
         }
+    }
     
     while (true) {
         // get messages from consumer.
@@ -424,6 +504,7 @@ int SrsLiveStream::streaming_send_messages(ISrsStreamEncoder* enc, SrsSharedPtrM
 SrsLiveEntry::SrsLiveEntry()
 {
     stream = NULL;
+    cache = NULL;
 }
 
 SrsHttpServer::SrsHttpServer()
@@ -485,7 +566,14 @@ int SrsHttpServer::mount(SrsSource* s, SrsRequest* r)
     // remove the default vhost mount
     mount = srs_string_replace(mount, SRS_CONSTS_RTMP_DEFAULT_VHOST"/", "/");
     
-    entry->stream = new SrsLiveStream(s, r);
+    entry->cache = new SrsStreamCache(s);
+    entry->stream = new SrsLiveStream(s, r, entry->cache);
+    
+    // start http stream cache thread
+    if ((ret = entry->cache->start()) != ERROR_SUCCESS) {
+        srs_error("http: start stream cache failed. ret=%d", ret);
+        return ret;
+    }
     
     // mount the http flv stream.
     if ((ret = mux.handle(mount, entry->stream)) != ERROR_SUCCESS) {

@@ -37,9 +37,11 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_http.hpp>
 #include <srs_app_reload.hpp>
 #include <srs_kernel_file.hpp>
+#include <srs_app_thread.hpp>
 
 class SrsSource;
 class SrsRequest;
+class SrsConsumer;
 class SrsStSocket;
 class SrsAacEncoder;
 class SrsMp3Encoder;
@@ -65,6 +67,27 @@ protected:
 };
 
 /**
+* for the srs http stream cache, 
+* for example, the audio stream cache to make android(weixin) happy.
+* we start a thread to shrink the queue.
+*/
+class SrsStreamCache : public ISrsThreadHandler
+{
+private:
+    SrsSource* source;
+    SrsThread* pthread;
+public:
+    SrsStreamCache(SrsSource* s);
+    virtual ~SrsStreamCache();
+public:
+    virtual int start();
+    virtual int dump_cache(SrsConsumer* consumer);
+// interface ISrsThreadHandler.
+public:
+    virtual int cycle();
+};
+
+/**
 * the stream encoder in some codec, for example, flv or aac.
 */
 class ISrsStreamEncoder
@@ -73,10 +96,29 @@ public:
     ISrsStreamEncoder();
     virtual ~ISrsStreamEncoder();
 public:
-    virtual int initialize(SrsFileWriter* w) = 0;
+    /**
+    * initialize the encoder with file writer(to http response) and stream cache.
+    * @param w the writer to write to http response.
+    * @param c the stream cache for audio stream fast startup.
+    */
+    virtual int initialize(SrsFileWriter* w, SrsStreamCache* c) = 0;
+    /**
+    * write rtmp video/audio/metadata.
+    */
     virtual int write_audio(int64_t timestamp, char* data, int size) = 0;
     virtual int write_video(int64_t timestamp, char* data, int size) = 0;
     virtual int write_metadata(int64_t timestamp, char* data, int size) = 0;
+public:
+    /**
+    * for some stream, for example, mp3 and aac, the audio stream,
+    * we use large gop cache in encoder, for the gop cache of SrsSource is ignore audio.
+    * @return true to use gop cache of encoder; otherwise, use SrsSource.
+    */
+    virtual bool has_cache() = 0;
+    /**
+    * dumps the cache of encoder to consumer.
+    */
+    virtual int dump_cache(SrsConsumer* consumer) = 0;
 };
 
 /**
@@ -90,10 +132,13 @@ public:
     SrsFlvStreamEncoder();
     virtual ~SrsFlvStreamEncoder();
 public:
-    virtual int initialize(SrsFileWriter* w);
+    virtual int initialize(SrsFileWriter* w, SrsStreamCache* c);
     virtual int write_audio(int64_t timestamp, char* data, int size);
     virtual int write_video(int64_t timestamp, char* data, int size);
     virtual int write_metadata(int64_t timestamp, char* data, int size);
+public:
+    virtual bool has_cache();
+    virtual int dump_cache(SrsConsumer* consumer);
 };
 
 /**
@@ -103,14 +148,18 @@ class SrsAacStreamEncoder : public ISrsStreamEncoder
 {
 private:
     SrsAacEncoder* enc;
+    SrsStreamCache* cache;
 public:
     SrsAacStreamEncoder();
     virtual ~SrsAacStreamEncoder();
 public:
-    virtual int initialize(SrsFileWriter* w);
+    virtual int initialize(SrsFileWriter* w, SrsStreamCache* c);
     virtual int write_audio(int64_t timestamp, char* data, int size);
     virtual int write_video(int64_t timestamp, char* data, int size);
     virtual int write_metadata(int64_t timestamp, char* data, int size);
+public:
+    virtual bool has_cache();
+    virtual int dump_cache(SrsConsumer* consumer);
 };
 
 /**
@@ -120,14 +169,18 @@ class SrsMp3StreamEncoder : public ISrsStreamEncoder
 {
 private:
     SrsMp3Encoder* enc;
+    SrsStreamCache* cache;
 public:
     SrsMp3StreamEncoder();
     virtual ~SrsMp3StreamEncoder();
 public:
-    virtual int initialize(SrsFileWriter* w);
+    virtual int initialize(SrsFileWriter* w, SrsStreamCache* c);
     virtual int write_audio(int64_t timestamp, char* data, int size);
     virtual int write_video(int64_t timestamp, char* data, int size);
     virtual int write_metadata(int64_t timestamp, char* data, int size);
+public:
+    virtual bool has_cache();
+    virtual int dump_cache(SrsConsumer* consumer);
 };
 
 /**
@@ -159,8 +212,9 @@ class SrsLiveStream : public ISrsGoHttpHandler
 private:
     SrsRequest* req;
     SrsSource* source;
+    SrsStreamCache* cache;
 public:
-    SrsLiveStream(SrsSource* s, SrsRequest* r);
+    SrsLiveStream(SrsSource* s, SrsRequest* r, SrsStreamCache* c);
     virtual ~SrsLiveStream();
 public:
     virtual int serve_http(ISrsGoHttpResponseWriter* w, SrsHttpMessage* r);
@@ -176,6 +230,7 @@ struct SrsLiveEntry
     std::string vhost;
     std::string mount;
     SrsLiveStream* stream;
+    SrsStreamCache* cache;
     
     SrsLiveEntry();
 };

@@ -1702,7 +1702,7 @@ void SrsSource::on_unpublish()
     handler->on_unpublish(this, _req);
 }
 
-int SrsSource::create_consumer(SrsConsumer*& consumer)
+int SrsSource::create_consumer(SrsConsumer*& consumer, bool dump_gop_cache)
 {
     int ret = ERROR_SUCCESS;
     
@@ -1750,11 +1750,14 @@ int SrsSource::create_consumer(SrsConsumer*& consumer)
     srs_info("dispatch audio sequence header success");
     
     // copy gop cache to client.
+    if (dump_gop_cache) {
         if ((ret = gop_cache->dump(consumer, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
             return ret;
         }
-    
         srs_trace("create consumer, queue_size=%.2f, tba=%d, tbv=%d", queue_size, sample_rate, frame_rate);
+    } else {
+        srs_trace("create consumer, ignore gop cache, tba=%d, tbv=%d", sample_rate, frame_rate);
+    }
     
     return ret;
 }

@@ -494,7 +494,7 @@ public:
     virtual void on_unpublish();
 // consumer methods
 public:
-    virtual int create_consumer(SrsConsumer*& consumer);
+    virtual int create_consumer(SrsConsumer*& consumer, bool dump_gop_cache = true);
     virtual void on_consumer_destroy(SrsConsumer* consumer);
     virtual void set_cache(bool enabled);
 // internal