for #635, support IDR and NonIDR(open-gop).

@@ -1071,7 +1071,7 @@ int SrsHlsCache::write_video(SrsAvcAacCodec* codec, SrsHlsMuxer* muxer, int64_t
         //      b. always reap when not wait keyframe.
         //      b. always reap when not wait keyframe.
         if (!muxer->wait_keyframe() || sample->frame_type == SrsCodecVideoAVCFrameKeyFrame) {
         if (!muxer->wait_keyframe() || sample->frame_type == SrsCodecVideoAVCFrameKeyFrame) {
             // when wait keyframe, there must exists idr frame in sample, or NonIDR(open gop) specified.
             // when wait keyframe, there must exists idr frame in sample, or NonIDR(open gop) specified.
-            if (!sample->has_non_idr && !sample->has_idr && muxer->wait_keyframe()) {
+            if (!sample->open_gop && !sample->has_idr && muxer->wait_keyframe()) {
                 srs_warn("hls: ts starts without IDR, first nalu=%d, idr=%d", sample->first_nalu_type, sample->has_idr);
                 srs_warn("hls: ts starts without IDR, first nalu=%d, idr=%d", sample->first_nalu_type, sample->has_idr);
             }
             }
             
             
@@ -1274,6 +1274,8 @@ void SrsHls::on_unpublish()
         srs_error("ignore m3u8 muxer flush/close audio failed. ret=%d", ret);
         srs_error("ignore m3u8 muxer flush/close audio failed. ret=%d", ret);
     }
     }
     
     
+    sample->reset();
+    
     hls_enabled = false;
     hls_enabled = false;
 }
 }
 
 

@@ -324,13 +324,20 @@ SrsCodecSampleUnit::~SrsCodecSampleUnit()
 
 
 SrsCodecSample::SrsCodecSample()
 SrsCodecSample::SrsCodecSample()
 {
 {
-    clear();
+    reset();
 }
 }
 
 
 SrsCodecSample::~SrsCodecSample()
 SrsCodecSample::~SrsCodecSample()
 {
 {
 }
 }
 
 
+void SrsCodecSample::reset()
+{
+    clear();
+    
+    open_gop = false;
+}
+
 void SrsCodecSample::clear()
 void SrsCodecSample::clear()
 {
 {
     is_video = false;
     is_video = false;
@@ -339,7 +346,7 @@ void SrsCodecSample::clear()
     cts = 0;
     cts = 0;
     frame_type = SrsCodecVideoAVCFrameReserved;
     frame_type = SrsCodecVideoAVCFrameReserved;
     avc_packet_type = SrsCodecVideoAVCTypeReserved;
     avc_packet_type = SrsCodecVideoAVCTypeReserved;
-    has_aud = has_sei = has_non_idr = has_idr = false;
+    has_aud = has_idr = false;
     first_nalu_type = SrsAvcNaluTypeReserved;
     first_nalu_type = SrsAvcNaluTypeReserved;
     
     
     acodec = SrsCodecAudioReserved1;
     acodec = SrsCodecAudioReserved1;
@@ -370,10 +377,6 @@ int SrsCodecSample::add_sample_unit(char* bytes, int size)
         
         
         if (nal_unit_type == SrsAvcNaluTypeIDR) {
         if (nal_unit_type == SrsAvcNaluTypeIDR) {
             has_idr = true;
             has_idr = true;
-        } else if (nal_unit_type == SrsAvcNaluTypeNonIDR) {
-            has_non_idr = true;
-        } else if (nal_unit_type == SrsAvcNaluTypeSEI) {
-            has_sei = true;
         } else if (nal_unit_type == SrsAvcNaluTypeAccessUnitDelimiter) {
         } else if (nal_unit_type == SrsAvcNaluTypeAccessUnitDelimiter) {
             has_aud = true;
             has_aud = true;
         }
         }
@@ -698,9 +701,26 @@ int SrsAvcAacCodec::video_avc_demux(char* data, int size, SrsCodecSample* sample
             return ret;
             return ret;
         }
         }
     } else if (avc_packet_type == SrsCodecVideoAVCTypeNALU){
     } else if (avc_packet_type == SrsCodecVideoAVCTypeNALU){
+        if ((ret = video_nalu_demux(stream, sample)) != ERROR_SUCCESS) {
+            return ret;
+        }
+    } else {
+        // ignored.
+    }
+    
+    srs_info("avc decoded, type=%d, codec=%d, avc=%d, cts=%d, size=%d",
+        frame_type, video_codec_id, avc_packet_type, composition_time, size);
+    
+    return ret;
+}
+
+int SrsAvcAacCodec::video_nalu_demux(SrsStream* stream, SrsCodecSample* sample)
+{
+    int ret = ERROR_SUCCESS;
+    
     // ensure the sequence header demuxed
     // ensure the sequence header demuxed
     if (!is_avc_codec_ok()) {
     if (!is_avc_codec_ok()) {
-            srs_warn("avc ignore type=%d for no sequence header. ret=%d", avc_packet_type, ret);
+        srs_warn("avc ignore type=%d for no sequence header. ret=%d", SrsCodecVideoAVCTypeNALU, ret);
         return ret;
         return ret;
     }
     }
     
     
@@ -752,12 +772,11 @@ int SrsAvcAacCodec::video_avc_demux(char* data, int size, SrsCodecSample* sample
         }
         }
         srs_info("hls decode avc payload in annexb format.");
         srs_info("hls decode avc payload in annexb format.");
     }
     }
-    } else {
-        // ignored.
-    }
     
     
-    srs_info("avc decoded, type=%d, codec=%d, avc=%d, cts=%d, size=%d",
-        frame_type, video_codec_id, avc_packet_type, composition_time, size);
+    // for keyframe, but not IDR, it's open gop.
+    if (sample->frame_type == SrsCodecVideoAVCFrameKeyFrame && !sample->has_idr) {
+        sample->open_gop = true;
+    }
     
     
     return ret;
     return ret;
 }
 }

@@ -385,15 +385,15 @@ public:
     SrsCodecVideoAVCType avc_packet_type;
     SrsCodecVideoAVCType avc_packet_type;
     // whether sample_units contains IDR frame.
     // whether sample_units contains IDR frame.
     bool has_idr;
     bool has_idr;
-    // Whether exists NonIDR NALU.
-    bool has_non_idr;
-    // Whether exists SEI NALU.
-    bool has_sei;
     // Whether exists AUD NALU.
     // Whether exists AUD NALU.
     bool has_aud;
     bool has_aud;
     // The first nalu type.
     // The first nalu type.
     SrsAvcNaluType first_nalu_type;
     SrsAvcNaluType first_nalu_type;
 public:
 public:
+    // Whether stream is open gop, which means the keyframe is not IDR but NonIDR.
+    // @remark we will identify whether stream is open-gop util reset.
+    bool open_gop;
+public:
     // audio specified
     // audio specified
     SrsCodecAudio acodec;
     SrsCodecAudio acodec;
     // audio aac specified.
     // audio aac specified.
@@ -405,6 +405,8 @@ public:
     SrsCodecSample();
     SrsCodecSample();
     virtual ~SrsCodecSample();
     virtual ~SrsCodecSample();
 public:
 public:
+    // Reset the sample, clear the sample-base and stream-base data.
+    void reset();
     /**
     /**
     * clear all samples.
     * clear all samples.
     * the sample units never copy the bytes, it directly use the ptr,
     * the sample units never copy the bytes, it directly use the ptr,
@@ -637,6 +639,8 @@ public:
     * demux the h.264 NALUs to sampe units.
     * demux the h.264 NALUs to sampe units.
     */
     */
     virtual int video_avc_demux(char* data, int size, SrsCodecSample* sample);
     virtual int video_avc_demux(char* data, int size, SrsCodecSample* sample);
+private:
+    virtual int video_nalu_demux(SrsStream* stream, SrsCodecSample* sample);
 public:
 public:
     /**
     /**
     * directly demux the sequence header, without RTMP packet header.
     * directly demux the sequence header, without RTMP packet header.

@@ -3010,7 +3010,7 @@ int SrsTsCache::do_cache_avc(SrsAvcAacCodec* codec, SrsCodecSample* sample)
     static u_int8_t aud_nalu_7[] = { 0x09, 0xf0};
     static u_int8_t aud_nalu_7[] = { 0x09, 0xf0};
     
     
     // For NonIDR(open gop), we directly appends all frames.
     // For NonIDR(open gop), we directly appends all frames.
-    if (sample->has_non_idr || (sample->has_aud && sample->has_sei)) {
+    if (sample->open_gop) {
         for (int i = 0; i < sample->nb_sample_units; i++) {
         for (int i = 0; i < sample->nb_sample_units; i++) {
             SrsCodecSampleUnit* sample_unit = &sample->sample_units[i];
             SrsCodecSampleUnit* sample_unit = &sample->sample_units[i];
             int32_t size = sample_unit->size;
             int32_t size = sample_unit->size;
@@ -3132,6 +3132,8 @@ int SrsTsEncoder::initialize(SrsFileWriter* fw)
         return ret;
         return ret;
     }
     }
     
     
+    sample->reset();
+    
     return ret;
     return ret;
 }
 }