[0.6.231] Fix typo error
[platform/core/multimedia/libmm-player.git] / src / mm_player_streaming.c
index f759e08..4a1735e 100644 (file)
  *
  */
 
-#include <sys/vfs.h>
 #include <dlog.h>
 #include "mm_player_utils.h"
 #include "mm_player_streaming.h"
 
+#define ESTIMATED_BUFFER_UNIT (1 * 1024 * 1024) /* 1 MBytes */
+
 typedef struct {
        gint byte_in_rate;              // byte
        gint byte_out_rate;             // byte
        gint time_rate;                 // ms
-       guint buffer_criteria;  // byte
 } streaming_bitrate_info_t;
 
 typedef struct {
@@ -41,47 +41,26 @@ typedef struct {
 typedef struct {
        guint buffering_bytes;          // bytes
        gint buffering_time;            // ms
-       gdouble percent_byte;
-       gdouble percent_time;
+       gdouble low_watermark;
+       gdouble high_watermark;
 } streaming_buffer_info_t;
 
-static void streaming_check_buffer_percent(gdouble in_low, gdouble in_high, gdouble *out_low, gdouble *out_high);
-static void streaming_set_buffer_percent(mm_player_streaming_t* streamer, BufferType type, gdouble low_percent, gdouble high_percent_byte, gdouble high_percent_time);
-static void streaming_set_queue2_queue_type(mm_player_streaming_t* streamer, MuxedBufferType type, gchar * file_path, guint64 content_size);
-static void streaming_set_buffer_size(mm_player_streaming_t* streamer, BufferType type, guint buffering_bytes, gint buffering_time);
-static void streaming_update_buffering_status(mm_player_streaming_t* streamer, GstMessage *buffering_msg, gint64 position);
-static void streaming_get_current_bitrate_info(mm_player_streaming_t* streamer,
-                                                                                               GstMessage *buffering_msg,
-                                                                                               streaming_content_info_t content_info,
-                                                                                               streaming_bitrate_info_t* bitrate_info);
-static void
-streaming_handle_fixed_buffering_mode(mm_player_streaming_t* streamer,
-                                                                               gint byte_out_rate,
-                                                                               gint fixed_buffering_time,
-                                                                               streaming_buffer_info_t* buffer_info);
-static void
-streaming_handle_adaptive_buffering_mode(mm_player_streaming_t* streamer,
-                                                                                       streaming_content_info_t content_info,
-                                                                                       streaming_bitrate_info_t bitrate_info,
-                                                                                       streaming_buffer_info_t* buffer_info,
-                                                                                       gint expected_play_time);
 static void
-streaming_update_buffer_setting(mm_player_streaming_t* streamer,
-                                                                       GstMessage *buffering_msg,
-                                                                       guint64 content_size,
-                                                                       gint64 position,
-                                                                       gint64 duration);
-
-mm_player_streaming_t *
-__mm_player_streaming_create(void)
+__streaming_update_buffer_setting(mmplayer_streaming_t *streamer,
+                                                               GstMessage *buffering_msg,
+                                                               guint64 content_size,
+                                                               gint64 position,
+                                                               gint64 duration);
+
+mmplayer_streaming_t *_mm_player_streaming_create(void)
 {
-       mm_player_streaming_t *streamer = NULL;
+       mmplayer_streaming_t *streamer = NULL;
 
        MMPLAYER_FENTER();
 
-       streamer = (mm_player_streaming_t *) g_malloc0(sizeof(mm_player_streaming_t));
+       streamer = (mmplayer_streaming_t *)g_try_malloc0(sizeof(mmplayer_streaming_t));
        if (!streamer) {
-               LOGE("fail to create streaming player handle..\n");
+               LOGE("fail to create streaming player handle..");
                return NULL;
        }
 
@@ -90,64 +69,30 @@ __mm_player_streaming_create(void)
        return streamer;
 }
 
-static void
-streaming_buffer_initialize(streaming_buffer_t* buffer_handle, gboolean buffer_init)
+static void __streaming_buffer_initialize(streaming_buffer_t *buffer_handle, gboolean buffer_init)
 {
        if (buffer_init)
                buffer_handle->buffer = NULL;
 
        buffer_handle->buffering_bytes = DEFAULT_BUFFER_SIZE_BYTES;
        buffer_handle->buffering_time = DEFAULT_BUFFERING_TIME;
-       buffer_handle->buffer_low_percent = DEFAULT_BUFFER_LOW_PERCENT;
-       buffer_handle->buffer_high_percent = DEFAULT_BUFFER_HIGH_PERCENT;
+       buffer_handle->buffer_high_watermark = DEFAULT_BUFFER_HIGH_WATERMARK;
+       buffer_handle->buffer_low_watermark = DEFAULT_BUFFER_LOW_WATERMARK;
        buffer_handle->is_live = FALSE;
-
-}
-
-void __mm_player_streaming_initialize(mm_player_streaming_t* streamer)
-{
-       MMPLAYER_FENTER();
-
-       streamer->streaming_buffer_type = BUFFER_TYPE_DEFAULT;  // multi-queue
-
-       streaming_buffer_initialize(&(streamer->buffer_handle[BUFFER_TYPE_MUXED]), TRUE);
-       streaming_buffer_initialize(&(streamer->buffer_handle[BUFFER_TYPE_DEMUXED]), TRUE);
-
-       streamer->buffering_req.mode = MM_PLAYER_BUFFERING_MODE_ADAPTIVE;
-       streamer->buffering_req.is_pre_buffering = FALSE;
-       streamer->buffering_req.prebuffer_time = 0;
-       streamer->buffering_req.rebuffer_time = 0;
-
-       streamer->default_val.buffering_monitor = FALSE;
-       streamer->default_val.buffering_time = DEFAULT_BUFFERING_TIME;
-
-       streamer->buffer_avg_bitrate = 0;
-       streamer->buffer_max_bitrate = 0;
-       streamer->need_update = FALSE;
-       streamer->need_sync = FALSE;
-
-       streamer->buffering_state = MM_PLAYER_BUFFERING_DEFAULT;
-       streamer->is_adaptive_streaming = FALSE;
-
-       streamer->buffering_percent = -1;
-       streamer->ring_buffer_size = DEFAULT_RING_BUFFER_SIZE;
-
-       MMPLAYER_FLEAVE();
-       return;
 }
 
-void __mm_player_streaming_deinitialize(mm_player_streaming_t* streamer)
+void _mm_player_streaming_initialize(mmplayer_streaming_t *streamer, gboolean buffer_init)
 {
        MMPLAYER_FENTER();
        MMPLAYER_RETURN_IF_FAIL(streamer);
 
-       streamer->streaming_buffer_type = BUFFER_TYPE_DEFAULT;  // multi-queue
+       streamer->streaming_buffer_type = BUFFER_TYPE_DEFAULT;
 
-       streaming_buffer_initialize(&(streamer->buffer_handle[BUFFER_TYPE_MUXED]), FALSE);
-       streaming_buffer_initialize(&(streamer->buffer_handle[BUFFER_TYPE_DEMUXED]), FALSE);
+       __streaming_buffer_initialize(&(streamer->buffer_handle[BUFFER_TYPE_MUXED]), buffer_init);
+       __streaming_buffer_initialize(&(streamer->buffer_handle[BUFFER_TYPE_DEMUXED]), buffer_init);
 
        streamer->buffering_req.mode = MM_PLAYER_BUFFERING_MODE_ADAPTIVE;
-       streamer->buffering_req.is_pre_buffering = FALSE;
+       streamer->buffering_req.is_pre_buffering = TRUE;
        streamer->buffering_req.prebuffer_time = 0;
        streamer->buffering_req.rebuffer_time = 0;
 
@@ -163,58 +108,48 @@ void __mm_player_streaming_deinitialize(mm_player_streaming_t* streamer)
        streamer->is_adaptive_streaming = FALSE;
 
        streamer->buffering_percent = -1;
-       streamer->ring_buffer_size = DEFAULT_RING_BUFFER_SIZE;
+       streamer->ring_buffer_size = DEFAULT_RING_BUFFER_SIZE_BYTES;
 
        MMPLAYER_FLEAVE();
        return;
 }
 
-void __mm_player_streaming_destroy(mm_player_streaming_t* streamer)
+void _mm_player_streaming_destroy(mmplayer_streaming_t *streamer)
 {
        MMPLAYER_FENTER();
 
-       g_free(streamer);
+       MMPLAYER_FREEIF(streamer);
 
        MMPLAYER_FLEAVE();
 
        return;
 }
 
-void __mm_player_streaming_set_content_bitrate(mm_player_streaming_t* streamer, guint max_bitrate, guint avg_bitrate)
+void _mm_player_streaming_set_content_bitrate(
+       mmplayer_streaming_t *streamer, guint max_bitrate, guint avg_bitrate)
 {
-       MMPLAYER_FENTER();
+       gboolean is_update = FALSE;
 
+       MMPLAYER_FENTER();
        MMPLAYER_RETURN_IF_FAIL(streamer);
 
-       /* Note : Update buffering criterion bytes
-       *      1. maximum bitrate is considered first.
-       *      2. average bitrage * 3 is next.
-       *      3. if there are no updated bitrate, use default buffering limit.
-       */
-       if (max_bitrate > 0 && streamer->buffer_max_bitrate != max_bitrate) {
-               LOGD("set maximum bitrate(%dbps).\n", max_bitrate);
+       if (max_bitrate > 0 && max_bitrate != streamer->buffer_max_bitrate) {
+               is_update = TRUE;
                streamer->buffer_max_bitrate = max_bitrate;
-               if (streamer->buffering_req.is_pre_buffering == FALSE) {
-                       streamer->need_update = TRUE;
-               } else {
-                       LOGD("pre-buffering...\n");
-
-                       if (IS_MUXED_BUFFERING_MODE(streamer))
-                               streaming_update_buffer_setting(streamer, NULL, 0, 0, 0);
-               }
        }
 
-       if (avg_bitrate > 0 && streamer->buffer_avg_bitrate != avg_bitrate) {
-               LOGD("set averate bitrate(%dbps).\n", avg_bitrate);
+       if (avg_bitrate > 0 && avg_bitrate != streamer->buffer_avg_bitrate) {
+               is_update = TRUE;
                streamer->buffer_avg_bitrate = avg_bitrate;
+       }
 
-               if (streamer->buffering_req.is_pre_buffering == FALSE) {
-                       streamer->need_update = TRUE;
-               } else {
-                       LOGD("pre-buffering...\n");
-
+       if (is_update) {
+               if (streamer->buffering_req.is_pre_buffering) {
+                       /* have to recalc queue2 size value after getting bitrate information */
                        if (IS_MUXED_BUFFERING_MODE(streamer))
-                               streaming_update_buffer_setting(streamer, NULL, 0, 0, 0);
+                               __streaming_update_buffer_setting(streamer, NULL, 0, 0, 0);
+               } else {
+                       streamer->need_update = TRUE;
                }
        }
 
@@ -222,48 +157,79 @@ void __mm_player_streaming_set_content_bitrate(mm_player_streaming_t* streamer,
        return;
 }
 
-static void
-streaming_check_buffer_percent(gdouble in_low, gdouble in_high, gdouble *out_low, gdouble *out_high)
+static void __streaming_calc_watermark(mmplayer_streaming_t *streamer,
+       guint expected_play_bytes, gint expected_play_time, gdouble *low_wm, gdouble *high_wm)
 {
-       gdouble buffer_low_percent = DEFAULT_BUFFER_LOW_PERCENT;
-       gdouble buffer_high_percent = DEFAULT_BUFFER_HIGH_PERCENT;
+#define PORTION_OF_HIGH_WM 1.1 /* need to compensate about low level */
+#define PORTION_OF_LOW_WM 0.1
 
-       MMPLAYER_FENTER();
+       streaming_buffer_t *buffer_handle = NULL;
+       gdouble wm_byte = 0.0, wm_time = 0.0;
+       gint current_buffering_size = 0;
 
-       MMPLAYER_RETURN_IF_FAIL(out_low && out_high);
+       MMPLAYER_RETURN_IF_FAIL(streamer && low_wm && high_wm);
 
-       if (in_low <= MIN_BUFFER_PERCENT || in_low >= MAX_BUFFER_PERCENT)
-               LOGW("buffer low percent is out of range. use defaut value.");
-       else
-               buffer_low_percent = in_low;
+       buffer_handle = &(streamer->buffer_handle[streamer->streaming_buffer_type]);
 
-       if (in_high  <=  MIN_BUFFER_PERCENT || in_high  >=  MAX_BUFFER_PERCENT)
-               LOGW("buffer high percent is out of range. use defaut value.");
-       else
-               buffer_high_percent = in_high;
+       LOGD("type %d, bytes %d / %d, time %d / %d", streamer->streaming_buffer_type,
+               expected_play_bytes, GET_CURRENT_BUFFERING_BYTE(buffer_handle),
+               expected_play_time, GET_CURRENT_BUFFERING_TIME(buffer_handle));
 
-       if (buffer_high_percent <= buffer_low_percent)
-               buffer_high_percent =  buffer_low_percent + 1.0;
+       if (expected_play_bytes > 0) {
+               /* and buffer size will be increased */
+               current_buffering_size = MAX(GET_CURRENT_BUFFERING_BYTE(buffer_handle), (expected_play_bytes * PORTION_OF_HIGH_WM));
+               GET_WATERMARK((expected_play_bytes * PORTION_OF_HIGH_WM), current_buffering_size, buffer_handle->buffer_high_watermark, wm_byte);
+               wm_byte = MIN(wm_byte, DEFAULT_BUFFER_HIGH_WATERMARK);
+       }
+
+       if (IS_MUXED_BUFFERING_MODE(streamer)) {
+               *high_wm = wm_byte;
+               *low_wm = wm_byte * PORTION_OF_LOW_WM;
+
+               /* If user set the very low level buffering time,
+                  buffer underrun could be occurred even if the min range is considered. */
+               GET_VALID_VALUE((*low_wm), LOW_WATERMARK_MIN_BYTE_LEVEL, DEFAULT_BUFFER_LOW_WATERMARK);
+       } else {
+               gdouble prev_low_wm_time = 0.0;
+               gdouble low_wm_time = 0.0, high_wm_time = 0.0;
+
+               expected_play_time = MAX(expected_play_time, LOW_WATERMARK_MIN_TIME_VALUE);
+               low_wm_time = expected_play_time * PORTION_OF_LOW_WM;
+               high_wm_time = expected_play_time * PORTION_OF_HIGH_WM;
+
+               /* 1. Get min watermark value */
+               /* 1-1. get max buffer size, expected time could be greater than current one */
+               LOGE("low wm time : %.3f ms", low_wm_time);
+               current_buffering_size = MAX(GET_CURRENT_BUFFERING_TIME(buffer_handle), high_wm_time);
+
+               /* 1-2. get previous low time value to keep the minimum watermark */
+               prev_low_wm_time = GET_CURRENT_BUFFERING_TIME(buffer_handle) * buffer_handle->buffer_low_watermark;
+               GET_VALID_VALUE(low_wm_time, LOW_WATERMARK_MIN_TIME_VALUE, prev_low_wm_time);
+
+               /* 1-3. get min watermark value based on the max buffer size */
+               GET_WATERMARK(low_wm_time, current_buffering_size, buffer_handle->buffer_low_watermark, *low_wm);
+               *low_wm = MIN(*low_wm, DEFAULT_BUFFER_LOW_WATERMARK);
+
+               /* 2. Get high watermark value.
+                     If the expected time is greater than current one, the buffer size will be increased after */
+               GET_WATERMARK(high_wm_time, current_buffering_size, buffer_handle->buffer_high_watermark, wm_time);
+               *high_wm = MAX(wm_byte, wm_time);
+               *high_wm = MIN(*high_wm, DEFAULT_BUFFER_HIGH_WATERMARK);
+       }
 
-       LOGD("set buffer percent to %2.3f ~ %2.3f.", buffer_low_percent, buffer_high_percent);
+       if (*low_wm >= *high_wm) {
+               LOGW("invalid high wm value %1.3f", *high_wm);
+               *high_wm = DEFAULT_BUFFER_HIGH_WATERMARK;
+       }
 
-       *out_low = buffer_low_percent;
-       *out_high = buffer_high_percent;
+       LOGD("new watermark value [%f ~ %f]", *low_wm, *high_wm);
 }
 
-static void
-streaming_set_buffer_percent(mm_player_streaming_t* streamer,
-                                                               BufferType type,
-                                                               gdouble low_percent,
-                                                               gdouble high_percent_byte,
-                                                               gdouble high_percent_time)
+static void __streaming_set_buffer_watermark(mmplayer_streaming_t *streamer,
+       buffer_type_e type, gdouble low_watermark, gdouble high_watermark)
 {
-       gdouble confirmed_low = DEFAULT_BUFFER_LOW_PERCENT;
-       gdouble confirmed_high = DEFAULT_BUFFER_HIGH_PERCENT;
-       gdouble high_percent = 0.0;
-
-       streaming_buffer_t* buffer_handle = NULL;
-       gchar* factory_name = NULL;
+       streaming_buffer_t *buffer_handle = NULL;
+       gchar *factory_name = NULL;
 
        MMPLAYER_FENTER();
        MMPLAYER_RETURN_IF_FAIL(streamer);
@@ -282,41 +248,32 @@ streaming_set_buffer_percent(mm_player_streaming_t* streamer,
                return;
        }
 
-       if (type == BUFFER_TYPE_MUXED)
-               high_percent = high_percent_byte;
-       else
-               high_percent = MAX(high_percent_time, high_percent_byte);
+       if (high_watermark <= MIN_BUFFER_WATERMARK || high_watermark  >=  MAX_BUFFER_WATERMARK)
+               high_watermark = DEFAULT_BUFFER_HIGH_WATERMARK;
 
-       streaming_check_buffer_percent(low_percent, high_percent, &confirmed_low, &confirmed_high);
+       if (low_watermark <= MIN_BUFFER_WATERMARK || low_watermark >= MAX_BUFFER_WATERMARK)
+               low_watermark = DEFAULT_BUFFER_LOW_WATERMARK;
 
        /* if use-buffering is disabled, this settings do not have any meaning. */
-       LOGD("target buffer elem : %s (%2.3f ~ %2.3f)",
-               GST_ELEMENT_NAME(buffer_handle->buffer), confirmed_low, confirmed_high);
-
-       if ((confirmed_low == DEFAULT_BUFFER_LOW_PERCENT) ||
-               (buffer_handle->buffer_low_percent != confirmed_low))
-               g_object_set(G_OBJECT(buffer_handle->buffer), "low-percent", (gint)confirmed_low, NULL);
+       if ((high_watermark == DEFAULT_BUFFER_HIGH_WATERMARK) ||
+               (buffer_handle->buffer_high_watermark != high_watermark) ||
+               (buffer_handle->buffer_low_watermark != low_watermark))
+               g_object_set(G_OBJECT(buffer_handle->buffer), "high-watermark", high_watermark,
+                                                       "low-watermark", low_watermark, NULL);
 
-       if ((confirmed_high == DEFAULT_BUFFER_HIGH_PERCENT) ||
-               (buffer_handle->buffer_high_percent != confirmed_high))
-               g_object_set(G_OBJECT(buffer_handle->buffer), "high-percent", (gint)confirmed_high, NULL);
+       LOGD("update elem:%s, wm:%1.3f ~ %1.3f", GST_ELEMENT_NAME(buffer_handle->buffer), low_watermark, high_watermark);
 
-       buffer_handle->buffer_low_percent = confirmed_low;
-       buffer_handle->buffer_high_percent = confirmed_high;
+       buffer_handle->buffer_high_watermark = high_watermark;
+       buffer_handle->buffer_low_watermark = low_watermark;
 
        MMPLAYER_FLEAVE();
        return;
 }
 
-static void
-streaming_set_queue2_queue_type(mm_player_streaming_t* streamer, MuxedBufferType type, gchar * file_path, guint64 content_size)
+static void __streaming_set_queue2_queue_type(mmplayer_streaming_t *streamer, muxed_buffer_type_e type)
 {
-       streaming_buffer_t* buffer_handle = NULL;
-       guint64 storage_available_size = 0; /* bytes */
+       streaming_buffer_t *buffer_handle = NULL;
        guint64 buffer_size = 0;  /* bytes */
-       gchar file_buffer_name[MM_MAX_URL_LEN] = {0};
-       struct statfs buf = {0};
-       gchar* factory_name = NULL;
 
        MMPLAYER_FENTER();
        MMPLAYER_RETURN_IF_FAIL(streamer);
@@ -324,26 +281,7 @@ streaming_set_queue2_queue_type(mm_player_streaming_t* streamer, MuxedBufferType
 
        buffer_handle = &(streamer->buffer_handle[BUFFER_TYPE_MUXED]);
 
-       if (!(buffer_handle && buffer_handle->buffer)) {
-               LOGE("buffer_handle->buffer is NULL!");
-               return;
-       }
-
-       factory_name = GST_OBJECT_NAME(gst_element_get_factory(buffer_handle->buffer));
-
-       if (!factory_name) {
-               LOGE("Fail to get factory name!");
-               return;
-       }
-
-       LOGD("target buffer elem : %s", GST_ELEMENT_NAME(buffer_handle->buffer));
-
-       if (!g_strrstr(factory_name, "queue2")) {
-               LOGD("only queue2 can use file buffer. not decodebin2 or multiQ\n");
-               return;
-       }
-
-       if (type == MUXED_BUFFER_TYPE_MEM_QUEUE) {
+       if (type == MUXED_BUFFER_TYPE_MEM_QUEUE) { /* ts */
                LOGD("use memory queue for buffering. streaming is played on push-based. \n"
                                        "buffering position would not be updated.\n"
                                        "buffered data would be flushed after played.\n"
@@ -351,46 +289,20 @@ streaming_set_queue2_queue_type(mm_player_streaming_t* streamer, MuxedBufferType
                return;
        }
 
-       LOGD("[Queue2] buffering type : %d. streaming is played on pull-based. \n", type);
-       if (type == MUXED_BUFFER_TYPE_FILE && file_path && strlen(file_path) > 0) {
-               if (statfs((const char *)file_path, &buf) < 0) {
-                       LOGW("[Queue2] fail to get available storage capacity. set mem ring buffer instead of file buffer.\n");
-                       buffer_size = (guint64)((streamer->ring_buffer_size > 0) ? (streamer->ring_buffer_size) : DEFAULT_RING_BUFFER_SIZE);
-               } else {
-                       storage_available_size = (guint64)buf.f_bavail * (guint64)buf.f_bsize; //bytes
-
-                       LOGD("[Queue2] the number of available blocks : %"G_GUINT64_FORMAT
-                                               ", the block size is %"G_GUINT64_FORMAT".\n",
-                                               (guint64)buf.f_bavail, (guint64)buf.f_bsize);
+       /* @see ini->http_ring_buffer_size */
+       buffer_size = (guint64)((streamer->ring_buffer_size > 0) ? (streamer->ring_buffer_size) : DEFAULT_RING_BUFFER_SIZE_BYTES);
 
-                       LOGD("[Queue2] calculated available storage size is %"
-                                                               G_GUINT64_FORMAT" Bytes.\n", storage_available_size);
-
-                       if (content_size <= 0 || content_size >= storage_available_size)
-                               buffer_size = storage_available_size;
-                       else
-                               buffer_size = 0L;
-
-                       g_snprintf(file_buffer_name, MM_MAX_URL_LEN, "%sXXXXXX", file_path);
-                       SECURE_LOGD("[Queue2] the buffering file name is %s.\n", file_buffer_name);
-
-                       g_object_set(G_OBJECT(buffer_handle->buffer), "temp-template", file_buffer_name, NULL);
-               }
-       } else {
-               buffer_size = (guint64)((streamer->ring_buffer_size > 0) ? (streamer->ring_buffer_size) : DEFAULT_RING_BUFFER_SIZE);
-       }
-
-       LOGW("[Queue2] set ring buffer size: %"G_GUINT64_FORMAT, buffer_size);
+       LOGW("ring buffer size: %"G_GUINT64_FORMAT, buffer_size);
        g_object_set(G_OBJECT(buffer_handle->buffer), "ring-buffer-max-size", buffer_size, NULL);
 
        MMPLAYER_FLEAVE();
        return;
 }
 
-static void
-streaming_set_buffer_size(mm_player_streaming_t* streamer, BufferType type, guint buffering_bytes, gint buffering_time)
+static void __streaming_set_buffer_size(mmplayer_streaming_t *streamer,
+       buffer_type_e type, guint buffering_bytes, gint buffering_time)
 {
-       streaming_buffer_tbuffer_handle = NULL;
+       streaming_buffer_t *buffer_handle = NULL;
 
        MMPLAYER_FENTER();
 
@@ -406,20 +318,21 @@ streaming_set_buffer_size(mm_player_streaming_t* streamer, BufferType type, guin
                                buffering_time = GET_CURRENT_BUFFERING_TIME(buffer_handle);
 
                        g_object_set(G_OBJECT(buffer_handle->buffer),
-                                                       "max-size-bytes", GET_MAX_BUFFER_BYTES(streamer),       /* mq size is fixed, control it with high/low percent value*/
+                                                       "max-size-bytes", MAX_BUFFER_SIZE_BYTES,        /* mq size is fixed, control it with high/low watermark value*/
                                                        "max-size-time", (guint64)(buffering_time * GST_MSECOND),
-                                                       "max-size-buffers", 0, NULL);                                           /* disable */
+                                                       "max-size-buffers", 0,                      /* disable */
+                                                       "use-interleave", FALSE, NULL);
 
-                       buffer_handle->buffering_time = buffering_time;
-                       buffer_handle->buffering_bytes = GET_MAX_BUFFER_BYTES(streamer);
+                       GET_CURRENT_BUFFERING_TIME(buffer_handle) = buffering_time;
+                       GET_CURRENT_BUFFERING_BYTE(buffer_handle) = MAX_BUFFER_SIZE_BYTES;
 
-                       LOGD("max-size-time : %d ms", buffering_time);
+                       LOGD("byte: %d, max-size-time : %d ms", buffering_bytes, buffering_time);
                } else {
                        /* queue2 */
                        if (buffer_handle->is_live)
                                g_object_set(G_OBJECT(buffer_handle->buffer),
                                                                "max-size-bytes", buffering_bytes,
-                                                               "max-size-time", (guint64)(buffering_time*GST_MSECOND),
+                                                               "max-size-time", (guint64)(buffering_time * GST_MSECOND),
                                                                "max-size-buffers", 0,
                                                                "use-rate-estimate", TRUE, NULL);
                        else
@@ -429,10 +342,10 @@ streaming_set_buffer_size(mm_player_streaming_t* streamer, BufferType type, guin
                                                                "max-size-buffers", 0,
                                                                "use-rate-estimate", FALSE, NULL);
 
-                       buffer_handle->buffering_bytes = buffering_bytes;
-                       buffer_handle->buffering_time = buffering_time;
+                       GET_CURRENT_BUFFERING_BYTE(buffer_handle) = buffering_bytes;
+                       GET_CURRENT_BUFFERING_TIME(buffer_handle) = buffering_time;
 
-                       LOGD("max-size-bytes : %d", buffering_bytes);
+                       LOGD("max-size-bytes : %d, time : %d", buffering_bytes, buffering_time);
                }
        }
 
@@ -440,107 +353,104 @@ streaming_set_buffer_size(mm_player_streaming_t* streamer, BufferType type, guin
        return;
 }
 
-void __mm_player_streaming_set_queue2(mm_player_streaming_t* streamer,
-                                                                               GstElement* buffer,
-                                                                               gboolean use_buffering,
-                                                                               guint buffering_bytes,
-                                                                               gint buffering_time,
-                                                                               gdouble low_percent,
-                                                                               gdouble high_percent,
-                                                                               MuxedBufferType type,
-                                                                               gchar* file_path,
-                                                                               guint64 content_size)
+void _mm_player_streaming_set_queue2(mmplayer_streaming_t *streamer, GstElement *buffer,
+       gboolean use_buffering, muxed_buffer_type_e type, guint64 content_size)
 {
+       guint queue_size_bytes = 0;
+       guint queue_size_time = 0;
+
        MMPLAYER_FENTER();
-       MMPLAYER_RETURN_IF_FAIL(streamer);
+       MMPLAYER_RETURN_IF_FAIL(streamer && buffer);
 
-       if (buffer) {
-               LOGD("USE-BUFFERING : %s", (use_buffering) ? "OOO" : "XXX");
+       LOGD("use buffering %d, type %d, content_size %"G_GUINT64_FORMAT, use_buffering, type, content_size);
 
-               streamer->buffer_handle[BUFFER_TYPE_MUXED].buffer = buffer;
+       streamer->buffer_handle[BUFFER_TYPE_MUXED].buffer = buffer;
 
-               if (use_buffering) {
-                       streamer->streaming_buffer_type = BUFFER_TYPE_MUXED;
+       if (use_buffering) { /* audio only content use queue2 for buffering */
+               streamer->streaming_buffer_type = BUFFER_TYPE_MUXED;
 
-                       if (content_size > 0) {
-                               if (streamer->buffering_req.prebuffer_time > 0)
-                                       streamer->buffering_req.is_pre_buffering = TRUE;
-                               else
-                                       streamer->buffering_req.prebuffer_time = buffering_time;
-                       } else {
-                               LOGD("live streaming without mq");
+               if (streamer->buffering_req.prebuffer_time <= MIN_BUFFERING_TIME)
+                       streamer->buffering_req.prebuffer_time = DEFAULT_PREBUFFERING_TIME;
 
-                               streamer->buffer_handle[BUFFER_TYPE_MUXED].is_live = TRUE;
-                               streamer->buffering_req.prebuffer_time = buffering_time = DEFAULT_BUFFERING_TIME;
-                       }
+               if (content_size == 0) {
+                       LOGD("live streaming without mq");
+                       streamer->buffer_handle[BUFFER_TYPE_MUXED].is_live = TRUE;
+               }
+
+               /* keep estimated value till the pipeline share the bitrate information */
+               queue_size_bytes = (guint)(streamer->buffering_req.prebuffer_time / 1000) * ESTIMATED_BUFFER_UNIT; /* temp size */
+               queue_size_bytes = MAX(queue_size_bytes, DEFAULT_BUFFER_SIZE_BYTES);
+               queue_size_time = streamer->buffering_req.prebuffer_time;
+       } else {
+               if (type >= MUXED_BUFFER_TYPE_MAX) {
+                       LOGE("invalid queue type");
+                       return;
                }
 
-               g_object_set(G_OBJECT(streamer->buffer_handle[BUFFER_TYPE_MUXED].buffer), "use-buffering", use_buffering, NULL);
+               /* set the simple queue size */
+               queue_size_bytes = DEFAULT_BUFFER_SIZE_BYTES;
+               __streaming_set_queue2_queue_type(streamer, type);
+               queue_size_time = 0; /* set in case of use-buffering */
        }
 
-       /* initial setting */
-       streaming_set_buffer_size(streamer, BUFFER_TYPE_MUXED, buffering_bytes, buffering_time);
-       streaming_set_buffer_percent(streamer, BUFFER_TYPE_MUXED, low_percent, high_percent, 0);
-       if (type < MUXED_BUFFER_TYPE_MAX)
-               streaming_set_queue2_queue_type(streamer, type, file_path, content_size);
+       g_object_set(G_OBJECT(streamer->buffer_handle[BUFFER_TYPE_MUXED].buffer), "use-buffering", use_buffering, NULL);
+
+       LOGD("buffer time: %d ms, buffer bytes: %d", queue_size_time, queue_size_bytes);
+       __streaming_set_buffer_size(streamer, BUFFER_TYPE_MUXED, queue_size_bytes, queue_size_time);
+       __streaming_set_buffer_watermark(streamer, BUFFER_TYPE_MUXED, DEFAULT_BUFFER_LOW_WATERMARK, DEFAULT_BUFFER_HIGH_WATERMARK);
 
        MMPLAYER_FLEAVE();
        return;
 }
 
-void __mm_player_streaming_sync_property(mm_player_streaming_t* streamer, GstElement* decodebin)
+void _mm_player_streaming_sync_property(mmplayer_streaming_t *streamer, GstElement *decodebin)
 {
-       streaming_buffer_tbuffer_handle = NULL;
+       streaming_buffer_t *buffer_handle = NULL;
 
        MMPLAYER_FENTER();
-
        MMPLAYER_RETURN_IF_FAIL(streamer && decodebin);
 
+       if ((!streamer->need_sync) || (streamer->streaming_buffer_type != BUFFER_TYPE_DEMUXED)) {
+               streamer->need_sync = FALSE;
+               return;
+       }
+
        buffer_handle = &(streamer->buffer_handle[BUFFER_TYPE_DEMUXED]);
 
-       if ((streamer->need_sync) && (streamer->streaming_buffer_type == BUFFER_TYPE_DEMUXED)) {
-               g_object_set(G_OBJECT(decodebin),
-                                       "max-size-bytes", buffer_handle->buffering_bytes,
-                                       "max-size-time", (guint64)(buffer_handle->buffering_time * GST_MSECOND),
-                                       "low-percent", (gint)buffer_handle->buffer_low_percent,
-                                       "high-percent", (gint)buffer_handle->buffer_high_percent, NULL);
-       }
+       LOGD("sync : %1.3f ~ %1.3f", buffer_handle->buffer_low_watermark, buffer_handle->buffer_high_watermark);
+       g_object_set(G_OBJECT(decodebin),
+                               "max-size-bytes", GET_CURRENT_BUFFERING_BYTE(buffer_handle),
+                               "max-size-time", (guint64)(GET_CURRENT_BUFFERING_TIME(buffer_handle) * GST_MSECOND),
+                               "high-percent", (gint)(buffer_handle->buffer_high_watermark * 100),
+                               "low-percent", (gint)(buffer_handle->buffer_low_watermark * 100), NULL);
 
        streamer->need_sync = FALSE;
 }
 
-void __mm_player_streaming_set_multiqueue(mm_player_streaming_t* streamer,
-                                                                               GstElement* buffer,
-                                                                               gint buffering_time,
-                                                                               gdouble low_percent,
-                                                                               gdouble high_percent)
+void _mm_player_streaming_set_multiqueue(mmplayer_streaming_t *streamer, GstElement *buffer)
 {
-       streaming_buffer_t* buffer_handle = NULL;
+       streaming_buffer_t *buffer_handle = NULL;
+       gdouble high_wm = 0.0, low_wm = 0.0;
 
        MMPLAYER_FENTER();
        MMPLAYER_RETURN_IF_FAIL(streamer && buffer);
 
        buffer_handle = &(streamer->buffer_handle[BUFFER_TYPE_DEMUXED]);
-
        buffer_handle->buffer = buffer;
 
+       LOGD("pre_buffering: %d ms", streamer->buffering_req.prebuffer_time);
+
        streamer->streaming_buffer_type = BUFFER_TYPE_DEMUXED;
        g_object_set(G_OBJECT(buffer_handle->buffer), "use-buffering", TRUE, NULL);
 
-
-       LOGD("pre_buffering: %d ms, during playing: %d ms\n", streamer->buffering_req.prebuffer_time, buffering_time);
-
-       if (streamer->buffering_req.prebuffer_time > 0)
-               streamer->buffering_req.is_pre_buffering = TRUE;
-       else
-               streamer->buffering_req.prebuffer_time = GET_DEFAULT_PLAYING_TIME(streamer);
-
-       high_percent = (gdouble)(streamer->buffering_req.prebuffer_time * 100) / GET_MAX_BUFFER_TIME(streamer);
-       LOGD("high_percent %2.3f %%\n", high_percent);
+       if (streamer->buffering_req.prebuffer_time <= MIN_BUFFERING_TIME)
+               streamer->buffering_req.prebuffer_time = DEFAULT_PREBUFFERING_TIME;
 
        /* initial setting */
-       streaming_set_buffer_size(streamer, BUFFER_TYPE_DEMUXED, GET_MAX_BUFFER_BYTES(streamer), GET_MAX_BUFFER_TIME(streamer));
-       streaming_set_buffer_percent(streamer, BUFFER_TYPE_DEMUXED, low_percent, 0, high_percent);
+       __streaming_set_buffer_size(streamer, BUFFER_TYPE_DEMUXED, MAX_BUFFER_SIZE_BYTES, MAX_BUFFER_SIZE_TIME);
+
+       __streaming_calc_watermark(streamer, 0, streamer->buffering_req.prebuffer_time, &low_wm, &high_wm);
+       __streaming_set_buffer_watermark(streamer, BUFFER_TYPE_DEMUXED, low_wm, high_wm);
 
        streamer->need_sync = TRUE;
 
@@ -548,20 +458,15 @@ void __mm_player_streaming_set_multiqueue(mm_player_streaming_t* streamer,
        return;
 }
 
-static void
-streaming_get_current_bitrate_info(mm_player_streaming_t* streamer,
-                                                                       GstMessage *buffering_msg,
-                                                                       streaming_content_info_t content_info,
-                                                                       streaming_bitrate_info_t* bitrate_info)
+static void __streaming_get_current_bitrate_info(mmplayer_streaming_t *streamer,
+       GstMessage *buffering_msg, streaming_content_info_t content_info, streaming_bitrate_info_t *bitrate_info)
 {
-
        GstQuery *query = NULL;
        GstBufferingMode mode = GST_BUFFERING_STREAM;
        gint in_rate = 0;
        gint out_rate = 0;
        gint64 buffering_left = -1;
 
-       guint buffer_criteria = 0;
        guint estimated_content_bitrate = 0;
 
        gint buffer_buffering_time = DEFAULT_BUFFERING_TIME;
@@ -586,34 +491,27 @@ streaming_get_current_bitrate_info(mm_player_streaming_t* streamer,
 
        LOGD("Streaming Info : in %d, out %d, left %"G_GINT64_FORMAT, in_rate, out_rate, buffering_left);
 
-       if ((content_info.content_size > 0) && (content_info.duration > 0) && ((content_info.duration/GST_SECOND) > 0))
-               estimated_content_bitrate = GET_BIT_FROM_BYTE((guint)(content_info.content_size / (content_info.duration/GST_SECOND)));
+       if ((content_info.content_size > 0) && (content_info.duration > 0) && ((content_info.duration / GST_SECOND) > 0))
+               estimated_content_bitrate = GET_BIT_FROM_BYTE((guint)(content_info.content_size / (content_info.duration / GST_SECOND)));
 
        if (streamer->buffer_max_bitrate > 0) {
                streamer->buffer_max_bitrate = MAX(streamer->buffer_max_bitrate, streamer->buffer_avg_bitrate);
                streamer->buffer_max_bitrate = MAX(streamer->buffer_max_bitrate, estimated_content_bitrate);
+       }
 
-               buffer_criteria = GET_BYTE_FROM_BIT(streamer->buffer_max_bitrate);
-
-               if (streamer->buffer_avg_bitrate > estimated_content_bitrate)
-                       out_rate = GET_BYTE_FROM_BIT(streamer->buffer_avg_bitrate);
-               else if (estimated_content_bitrate != 0)
-                       out_rate = GET_BYTE_FROM_BIT(estimated_content_bitrate);
-               else
-                       out_rate = GET_BYTE_FROM_BIT(streamer->buffer_max_bitrate/3);
-
-               LOGD("(max)content_max_byte_rate %d, byte_out_rate %d\n", buffer_criteria, out_rate);
-       } else if (streamer->buffer_avg_bitrate > 0) {
-               buffer_criteria = GET_BYTE_FROM_BIT(streamer->buffer_avg_bitrate * 3);
+       if (streamer->buffer_avg_bitrate > 0)
                out_rate = GET_BYTE_FROM_BIT(MAX(streamer->buffer_avg_bitrate, estimated_content_bitrate));
+       else if (estimated_content_bitrate > 0)
+               out_rate = GET_BYTE_FROM_BIT(estimated_content_bitrate);
+       else if (streamer->buffer_max_bitrate > 0)
+               out_rate = GET_BYTE_FROM_BIT(streamer->buffer_max_bitrate/3);
+       else
+               LOGW("There is no content information");
 
-               LOGD("(avg)content_max_byte_rate %d, byte_out_rate %d\n", buffer_criteria, out_rate);
-       } else {
-               LOGW("There is no content bitrate information\n");
-       }
+       LOGD("byte_out_rate %d", out_rate);
 
        if ((in_rate > 0) && (out_rate > 0))
-               buffer_buffering_time =  (gint)(out_rate / in_rate)*1000;
+               buffer_buffering_time =  (gint)(out_rate / in_rate) * 1000;
        else if ((in_rate <= 0) && (out_rate > 0))
                buffer_buffering_time = MAX_BUFFERING_TIME;
        else
@@ -622,253 +520,197 @@ streaming_get_current_bitrate_info(mm_player_streaming_t* streamer,
        (*bitrate_info).byte_in_rate = in_rate;
        (*bitrate_info).byte_out_rate = out_rate;
        (*bitrate_info).time_rate = buffer_buffering_time;
-       (*bitrate_info).buffer_criteria = buffer_criteria;
 }
 
-static void
-streaming_handle_fixed_buffering_mode(mm_player_streaming_t* streamer,
-                                                                               gint byte_out_rate,
-                                                                               gint fixed_buffering_time,
-                                                                               streaming_buffer_info_t* buffer_info)
+static void __streaming_handle_fixed_buffering_mode(mmplayer_streaming_t *streamer,
+       gint byte_out_rate, gint expected_play_time, streaming_buffer_info_t *buffer_info)
 {
-       streaming_buffer_tbuffer_handle = NULL;
+       streaming_buffer_t *buffer_handle = NULL;
 
-       guint buffering_bytes = 0;
-       gint buffering_time = 0;
-       gdouble per_byte = 0.0;
-       gdouble per_time = 0.0;
+       guint expected_play_bytes = 0;
+       gdouble high_wm = 0.0, low_wm = 0.0;
 
        MMPLAYER_RETURN_IF_FAIL(streamer);
        MMPLAYER_RETURN_IF_FAIL(buffer_info);
 
        buffer_handle = &(streamer->buffer_handle[streamer->streaming_buffer_type]);
-       buffering_time = fixed_buffering_time;
 
-       LOGD("buffering time: %d ms, out rate: %d\n", buffering_time, byte_out_rate);
+       LOGD("buffering time: %d ms, out rate: %d", expected_play_time, byte_out_rate);
 
-       if ((buffering_time > 0) && (byte_out_rate > 0)) {
-               buffering_bytes = (guint)GET_NEW_BUFFERING_BYTE((gdouble)(byte_out_rate * buffering_time)/1000);
+       if (byte_out_rate > 0) {
+               guint max_size_byte = GET_MAX_BUFFER_SIZE_BYTES(streamer->streaming_buffer_type);
+               expected_play_bytes = (guint)GET_NEW_BUFFERING_BYTE((gdouble)(byte_out_rate * expected_play_time) / 1000, max_size_byte);
        } else {
-               if (buffering_time <= 0)
-                       buffering_time = GET_CURRENT_BUFFERING_TIME(buffer_handle);
-
-               LOGW("content bitrate is not updated yet.\n");
-               buffering_bytes = GET_CURRENT_BUFFERING_BYTE(buffer_handle);
+               LOGW("content bitrate is not updated yet.");
+               expected_play_bytes = GET_CURRENT_BUFFERING_BYTE(buffer_handle);
        }
 
-       GET_PERCENT(buffering_time, GET_CURRENT_BUFFERING_TIME(buffer_handle), buffer_handle->buffer_high_percent, per_time);
-       GET_PERCENT(buffering_bytes, GET_CURRENT_BUFFERING_BYTE(buffer_handle), buffer_handle->buffer_high_percent, per_byte);
+       __streaming_calc_watermark(streamer, expected_play_bytes, expected_play_time, &low_wm, &high_wm);
 
-       LOGD("bytes %d, time %d, per_byte %f, per_time %f\n", buffering_bytes, buffering_time, per_byte, per_time);
-
-       (*buffer_info).buffering_bytes = buffering_bytes;
-       (*buffer_info).buffering_time = buffering_time;
-       (*buffer_info).percent_byte = per_byte;
-       (*buffer_info).percent_time = per_time;
+       (*buffer_info).buffering_bytes = expected_play_bytes;
+       (*buffer_info).buffering_time = expected_play_time;
+       (*buffer_info).high_watermark = high_wm;
+       (*buffer_info).low_watermark = low_wm;
 }
 
-static void
-streaming_handle_adaptive_buffering_mode(mm_player_streaming_t* streamer,
-                                                                               streaming_content_info_t content_info,
-                                                                               streaming_bitrate_info_t bitrate_info,
-                                                                               streaming_buffer_info_t* buffer_info,
-                                                                               gint expected_play_time)
+static void __streaming_handle_adaptive_buffering_mode(mmplayer_streaming_t *streamer,
+       streaming_content_info_t content_info, streaming_bitrate_info_t bitrate_info,
+       streaming_buffer_info_t *buffer_info, gint expected_play_time)
 {
-       streaming_buffer_t* buffer_handle = NULL;
-
        gint buffering_bytes = 0;
        gint adj_buffering_bytes = 0;
        gint buffer_buffering_time = 0;
-       gdouble per_byte = 0.0;
-       gdouble per_time = 0.0;
+       gdouble high_wm = 0.0, low_wm = 0.0;
        gdouble portion = 0.0;
        gint default_buffering_time = 0;
 
        MMPLAYER_RETURN_IF_FAIL(streamer);
        MMPLAYER_RETURN_IF_FAIL(buffer_info);
 
-       LOGD("pos %"G_GINT64_FORMAT", dur %"G_GINT64_FORMAT", size %"G_GUINT64_FORMAT", in/out:%d/%d, buffer_criteria:%d, time_rate:%d, need:%d ms\n",
-                                                       content_info.position, content_info.duration, content_info.content_size,
-                                                       bitrate_info.byte_in_rate, bitrate_info.byte_out_rate,
-                                                       bitrate_info.buffer_criteria, bitrate_info.time_rate, expected_play_time);
+       LOGD("monitor %d, pos %"G_GINT64_FORMAT", dur %"G_GINT64_FORMAT", size %"G_GUINT64_FORMAT", in/out:%d/%d, time_rate:%d, need:%d ms",
+                                       streamer->default_val.buffering_monitor, content_info.position, content_info.duration, content_info.content_size,
+                                       bitrate_info.byte_in_rate, bitrate_info.byte_out_rate, bitrate_info.time_rate, expected_play_time);
 
        if ((content_info.duration <= 0) ||
                (content_info.content_size <= 0)) {
-               LOGW("keep previous setting.\n");
+               LOGW("keep previous setting.");
                return;
        }
 
-       if ((bitrate_info.byte_out_rate <= 0) || (bitrate_info.buffer_criteria == 0)) {
-               LOGW("keep previous setting.\n");
+       if (bitrate_info.byte_out_rate <= 0) {
+               LOGW("keep previous setting.");
                return;
        }
 
-       buffer_handle = &(streamer->buffer_handle[streamer->streaming_buffer_type]);
-
        if (bitrate_info.byte_in_rate < bitrate_info.byte_out_rate) {
+               guint max_size_byte = GET_MAX_BUFFER_SIZE_BYTES(streamer->streaming_buffer_type);
                portion = (double)(expected_play_time * GST_MSECOND) / (double)content_info.duration;
-               buffering_bytes = GET_NEW_BUFFERING_BYTE(((double)content_info.content_size * portion)  \
-                                                                                                                       * (1 - (double)bitrate_info.byte_in_rate/(double)bitrate_info.byte_out_rate));
+               buffering_bytes = GET_NEW_BUFFERING_BYTE(
+                       (((double)content_info.content_size * portion) *
+                         (1 - (double)bitrate_info.byte_in_rate / (double)bitrate_info.byte_out_rate)), max_size_byte);
        } else {
                /* buffering_bytes will be set as streamer->default_val.buffering_time *
                 * receiving rate is bigger than avg content bitrate
                 * so there is no reason to buffering. if the buffering msg is posted
                 * in-rate or contents bitrate has wrong value. */
-               LOGW("don't need to do buffering.\n");
+               LOGW("don't need to do buffering.");
        }
 
        if (buffering_bytes > 0)
-               buffer_buffering_time = (gint)(buffering_bytes / bitrate_info.byte_out_rate)*1000;
+               buffer_buffering_time = (gint)(buffering_bytes / bitrate_info.byte_out_rate) * 1000;
 
        if (content_info.position <= 0) {
                /* if the buffer is filled under 50%, MSL use the original default buffering time.
                   if not, MSL use just 2 sec as a default buffering time. (to reduce initial buffering time) */
-               default_buffering_time = streamer->default_val.buffering_time - ((gdouble)streamer->buffering_percent/50)*1000;
+               default_buffering_time = streamer->default_val.buffering_time - ((gdouble)streamer->buffering_percent / 50) * 1000;
        } else {
                default_buffering_time = streamer->default_val.buffering_time;
        }
 
        if (buffer_buffering_time < default_buffering_time) {
-               LOGD("adjusted time: %d -> %d ms\n", buffer_buffering_time, default_buffering_time);
-               LOGD("adjusted bytes : %d or %d or %d\n",
-                       buffering_bytes,
-                       (gint)(bitrate_info.byte_out_rate * buffer_buffering_time/1000),
-                       (gint)(bitrate_info.buffer_criteria * buffer_buffering_time/1000));
+               guint max_size_byte = GET_MAX_BUFFER_SIZE_BYTES(streamer->streaming_buffer_type);
+
+               LOGD("adjusted time: %d -> %d ms", buffer_buffering_time, default_buffering_time);
+               LOGD("adjusted bytes : %d or %d", buffering_bytes,
+                       (gint)(bitrate_info.byte_out_rate * buffer_buffering_time / 1000));
 
-               /* start monitoring the abmormal state */
+               /* start monitoring the abnormal state */
                if (content_info.position > 0)
                        streamer->default_val.buffering_monitor = TRUE;
 
                buffer_buffering_time = default_buffering_time;
-               adj_buffering_bytes = GET_NEW_BUFFERING_BYTE(bitrate_info.byte_out_rate * (gint)ceil((gdouble)buffer_buffering_time/1000));
+               adj_buffering_bytes = GET_NEW_BUFFERING_BYTE(
+                       (bitrate_info.byte_out_rate * (gint)ceil((gdouble)buffer_buffering_time / 1000)), max_size_byte);
                buffering_bytes = MAX(buffering_bytes, adj_buffering_bytes);
        }
 
-       GET_PERCENT(buffering_bytes, GET_CURRENT_BUFFERING_BYTE(buffer_handle), buffer_handle->buffer_high_percent, per_byte);
-       GET_PERCENT(buffer_buffering_time, GET_CURRENT_BUFFERING_TIME(buffer_handle), buffer_handle->buffer_high_percent, per_time);
-
-       LOGD("monitor %d, bytes %d, time %d, per_byte %f, per_time %f\n",
-                                                                               streamer->default_val.buffering_monitor,
-                                                                               buffering_bytes, buffer_buffering_time, per_byte, per_time);
+       __streaming_calc_watermark(streamer, buffering_bytes, buffer_buffering_time, &low_wm, &high_wm);
 
        (*buffer_info).buffering_bytes = buffering_bytes;
        (*buffer_info).buffering_time = buffer_buffering_time;
-       (*buffer_info).percent_byte = per_byte;
-       (*buffer_info).percent_time = per_time;
-
+       (*buffer_info).high_watermark = high_wm;
+       (*buffer_info).low_watermark = low_wm;
 }
 
-static void
-streaming_update_buffer_setting(mm_player_streaming_t* streamer,
-                                                                       GstMessage *buffering_msg,      /* can be null */
-                                                                       guint64 content_size,
-                                                                       gint64 position,
-                                                                       gint64 duration)
+static void __streaming_update_buffer_setting(mmplayer_streaming_t *streamer,
+       GstMessage *buffering_msg, guint64 content_size, gint64 position, gint64 duration)
 {
-       streaming_buffer_t* buffer_handle = NULL;
-       MMPlayerBufferingMode buffering_mode = MM_PLAYER_BUFFERING_MODE_ADAPTIVE;
+       streaming_buffer_t *buffer_handle = NULL;
+       mmplayer_buffering_mode_e buffering_mode = MM_PLAYER_BUFFERING_MODE_ADAPTIVE;
+       gint expected_play_time = DEFAULT_REBUFFERING_TIME;
 
-       streaming_buffer_info_t buffer_info;
-       streaming_content_info_t content_info;
-       streaming_bitrate_info_t bitrate_info;
-
-       gdouble low_percent = 0.0;
+       streaming_buffer_info_t buffer_info = {0,};
+       streaming_content_info_t content_info = {0,};
+       streaming_bitrate_info_t bitrate_info = {0,};
 
        MMPLAYER_FENTER();
-
        MMPLAYER_RETURN_IF_FAIL(streamer);
 
-       memset(&buffer_info, 0x00, sizeof(streaming_buffer_info_t));
-       memset(&content_info, 0x00, sizeof(streaming_content_info_t));
-       memset(&bitrate_info, 0x00, sizeof(streaming_bitrate_info_t));
-
        buffer_handle = &(streamer->buffer_handle[streamer->streaming_buffer_type]);
 
-       if (streamer->buffering_req.is_pre_buffering == TRUE)
+       if (streamer->buffering_req.is_pre_buffering == TRUE) {
                buffering_mode = MM_PLAYER_BUFFERING_MODE_FIXED;
-       else
-               buffering_mode = streamer->buffering_req.mode;
+               expected_play_time = streamer->buffering_req.prebuffer_time;
+       } else {
+               if (content_size == 0 || duration == 0) /* can not support adaptive mode */
+                       buffering_mode = MM_PLAYER_BUFFERING_MODE_FIXED;
+               else
+                       buffering_mode = streamer->buffering_req.mode;
+
+               if (buffering_mode == MM_PLAYER_BUFFERING_MODE_FIXED) {
+                       if (streamer->buffering_req.rebuffer_time > 0)
+                               expected_play_time = streamer->buffering_req.rebuffer_time;
+                       else
+                               expected_play_time = DEFAULT_LIVE_REBUFFER_TIME;
+               }
+       }
 
-       buffer_info.buffering_bytes = buffer_handle->buffering_bytes;
-       buffer_info.buffering_time = buffer_handle->buffering_time;
-       buffer_info.percent_byte = buffer_handle->buffer_high_percent;
-       buffer_info.percent_time = buffer_handle->buffer_high_percent;
+       LOGD("buffering mode: %d, time: %d", buffering_mode, expected_play_time);
 
        content_info.position = position;
        content_info.duration = duration;
        content_info.content_size = content_size;
 
-       streaming_get_current_bitrate_info(streamer, buffering_msg, content_info, &bitrate_info);
+       __streaming_get_current_bitrate_info(streamer, buffering_msg, content_info, &bitrate_info);
 
-       LOGD("buffering mode %d, new info in_r:%d, out_r:%d, cb:%d, bt:%d\n",
-                                       buffering_mode, bitrate_info.byte_in_rate, bitrate_info.byte_out_rate,
-                                       bitrate_info.buffer_criteria, bitrate_info.time_rate);
-
-       /* calculate buffer low/high percent */
-       low_percent = DEFAULT_BUFFER_LOW_PERCENT;
+       LOGD("in_r:%d, out_r:%d", bitrate_info.byte_in_rate, bitrate_info.byte_out_rate);
 
        if (buffering_mode == MM_PLAYER_BUFFERING_MODE_FIXED) {
-               /********************
-                * (1) fixed mode   *
-                ********************/
-               gint buffering_time = 0;
-
-               if (streamer->buffering_req.is_pre_buffering == TRUE)
-                       buffering_time = streamer->buffering_req.prebuffer_time;
-               else
-                       buffering_time = streamer->buffering_req.rebuffer_time;
-
-               streaming_handle_fixed_buffering_mode(streamer, bitrate_info.byte_out_rate, buffering_time, &buffer_info);
+               __streaming_handle_fixed_buffering_mode(streamer, bitrate_info.byte_out_rate, expected_play_time, &buffer_info);
        } else {
-               /*********************************
-                * (2) adaptive mode (default)   *
-                *********************************/
-               gint expected_play_time = DEFAULT_PLAYING_TIME;
-
-               if (streamer->buffering_req.rebuffer_time > 0)
-                       expected_play_time = streamer->buffering_req.rebuffer_time;
-               else if ((position == 0) && (streamer->buffering_state & MM_PLAYER_BUFFERING_IN_PROGRESS))
-                       expected_play_time = streamer->buffering_req.prebuffer_time;
+               __streaming_handle_adaptive_buffering_mode(streamer, content_info, bitrate_info, &buffer_info, expected_play_time);
 
-               if (expected_play_time <= 0)
-                       expected_play_time = DEFAULT_PLAYING_TIME;
-
-               streaming_handle_adaptive_buffering_mode(streamer, content_info, bitrate_info, &buffer_info, expected_play_time);
-
-               if (IS_MUXED_BUFFERING_MODE(streamer))  // even if new byte size is smaller than the previous one, time need to be updated.
-                       buffer_handle->buffering_time = buffer_info.buffering_time;
+               /* even if new byte size is smaller than the previous one, time need to be updated. */
+               if (IS_MUXED_BUFFERING_MODE(streamer))
+                       GET_CURRENT_BUFFERING_TIME(buffer_handle) = buffer_info.buffering_time;
        }
 
-       LOGD("adj buffer(%d) %d->%d bytes/%d->%d ms\n",
-                                       streamer->streaming_buffer_type,
-                                       GET_CURRENT_BUFFERING_BYTE(buffer_handle), buffer_info.buffering_bytes,
-                                       GET_CURRENT_BUFFERING_TIME(buffer_handle), buffer_info.buffering_time);
+       LOGD("adj buffer(%d) %d->%d bytes/%d->%d ms",
+               streamer->streaming_buffer_type,
+               GET_CURRENT_BUFFERING_BYTE(buffer_handle), buffer_info.buffering_bytes,
+               GET_CURRENT_BUFFERING_TIME(buffer_handle), buffer_info.buffering_time);
 
        /* queue2 : bytes, multiqueue : time */
        if (((GET_CURRENT_BUFFERING_BYTE(buffer_handle) < buffer_info.buffering_bytes) && IS_MUXED_BUFFERING_MODE(streamer)) ||
                ((GET_CURRENT_BUFFERING_TIME(buffer_handle) < buffer_info.buffering_time) && IS_DEMUXED_BUFFERING_MODE(streamer))) {
                if (duration > 0 && position > 0) {
-                       gint buffering_time_limit = (gint)(duration - position)/GST_MSECOND;
+                       gint buffering_time_limit = (gint)(duration - position) / GST_MSECOND;
 
                        if (buffer_info.buffering_time > buffering_time_limit)
                                buffer_info.buffering_time = buffering_time_limit;
                }
-
-               streaming_set_buffer_size(streamer, streamer->streaming_buffer_type, buffer_info.buffering_bytes, buffer_info.buffering_time);
+               __streaming_set_buffer_size(streamer, streamer->streaming_buffer_type, buffer_info.buffering_bytes, buffer_info.buffering_time);
        }
 
-       streaming_set_buffer_percent(streamer, streamer->streaming_buffer_type, low_percent, buffer_info.percent_byte, buffer_info.percent_time);
+       __streaming_set_buffer_watermark(streamer, streamer->streaming_buffer_type, buffer_info.low_watermark, buffer_info.high_watermark);
 
-       LOGD("buffer setting: size %d, time %d, per %f\n",
-                                                       GET_CURRENT_BUFFERING_BYTE(buffer_handle),
-                                                       GET_CURRENT_BUFFERING_TIME(buffer_handle),
-                                                       buffer_handle->buffer_high_percent);
+       LOGD("buffer setting: size %d, time %d, watermark %f", GET_CURRENT_BUFFERING_BYTE(buffer_handle),
+               GET_CURRENT_BUFFERING_TIME(buffer_handle), buffer_handle->buffer_high_watermark);
 
        streamer->need_sync = TRUE;
 }
 
-static void
-streaming_adjust_min_threshold(mm_player_streaming_t* streamer, gint64 position)
+static void __streaming_adjust_min_threshold(mmplayer_streaming_t *streamer, gint64 position)
 {
 #define DEFAULT_TIME_PAD 1000  /* ms */
        gint playing_time = 0;
@@ -882,7 +724,7 @@ streaming_adjust_min_threshold(mm_player_streaming_t* streamer, gint64 position)
        LOGD("buffering monitor = %s", (streamer->default_val.buffering_monitor) ? "ON" : "OFF");
        LOGD("playing_time (%d ms) = %"G_GINT64_FORMAT" - %"G_GINT64_FORMAT, playing_time, position, streamer->default_val.prev_pos);
        LOGD("default time : %d, prev buffering t : %d",
-                                       streamer->default_val.buffering_time, streamer->buffer_handle[streamer->streaming_buffer_type].buffering_time);
+               streamer->default_val.buffering_time, streamer->buffer_handle[streamer->streaming_buffer_type].buffering_time);
 
        if ((streamer->default_val.buffering_monitor) && (playing_time <= streamer->default_val.buffering_time)) {
                gint time_gap = 0;
@@ -890,20 +732,19 @@ streaming_adjust_min_threshold(mm_player_streaming_t* streamer, gint64 position)
                if (time_gap <= 0)
                        time_gap = DEFAULT_TIME_PAD;
 
-               streamer->default_val.buffering_time += time_gap*2;
+               streamer->default_val.buffering_time += time_gap * 2;
                streamer->default_val.buffering_time = MIN(streamer->default_val.buffering_time, MAX_BUFFERING_TIME);
        } else {
                streamer->default_val.buffering_time = DEFAULT_BUFFERING_TIME;
        }
 
-       LOGD("new default min value %d \n", streamer->default_val.buffering_time);
+       LOGD("new default min value %d", streamer->default_val.buffering_time);
 
        streamer->default_val.buffering_monitor = FALSE;
        streamer->default_val.prev_pos = position;
 }
 
-static void
-streaming_update_buffering_status(mm_player_streaming_t* streamer, GstMessage *buffering_msg, gint64 position)
+static void __streaming_update_buffering_status(mmplayer_streaming_t *streamer, GstMessage *buffering_msg, gint64 position)
 {
        gint buffer_percent = 0;
 
@@ -911,6 +752,8 @@ streaming_update_buffering_status(mm_player_streaming_t* streamer, GstMessage *b
 
        MMPLAYER_RETURN_IF_FAIL(streamer);
        MMPLAYER_RETURN_IF_FAIL(buffering_msg);
+       MMPLAYER_RETURN_IF_FAIL(GST_IS_MESSAGE(buffering_msg));
+       MMPLAYER_RETURN_IF_FAIL((GST_MESSAGE_TYPE(buffering_msg) == GST_MESSAGE_BUFFERING));
 
        /* update when buffering has started. */
        if (!(streamer->buffering_state & MM_PLAYER_BUFFERING_IN_PROGRESS)) {
@@ -919,7 +762,7 @@ streaming_update_buffering_status(mm_player_streaming_t* streamer, GstMessage *b
 
                if (!streamer->buffering_req.is_pre_buffering) {
                        streamer->need_update = TRUE;
-                       streaming_adjust_min_threshold(streamer, position);
+                       __streaming_adjust_min_threshold(streamer, position);
                }
        }
 
@@ -937,6 +780,7 @@ streaming_update_buffering_status(mm_player_streaming_t* streamer, GstMessage *b
        if (streamer->buffering_percent == MAX_BUFFER_PERCENT) {
                streamer->buffering_state = MM_PLAYER_BUFFERING_DEFAULT;
                streamer->buffering_req.is_pre_buffering = FALSE;
+               streamer->need_update = TRUE;
        } else if (streamer->buffering_state & MM_PLAYER_BUFFERING_COMPLETE) {
                streamer->buffering_state = MM_PLAYER_BUFFERING_COMPLETE; /* have to keep state to ignore remained msg till get 100% msg */
                streamer->buffering_req.is_pre_buffering = FALSE;
@@ -945,29 +789,24 @@ streaming_update_buffering_status(mm_player_streaming_t* streamer, GstMessage *b
        }
 }
 
-void __mm_player_streaming_buffering(mm_player_streaming_t* streamer,
-                                                                               GstMessage *buffering_msg,
-                                                                               guint64 content_size,
-                                                                               gint64 position,
-                                                                               gint64 duration)
+void _mm_player_streaming_buffering(mmplayer_streaming_t *streamer, GstMessage *buffering_msg,
+       guint64 content_size, gint64 position, gint64 duration)
 {
        MMPLAYER_FENTER();
-
        MMPLAYER_RETURN_IF_FAIL(streamer);
-       MMPLAYER_RETURN_IF_FAIL(buffering_msg);
-       MMPLAYER_RETURN_IF_FAIL(GST_IS_MESSAGE(buffering_msg));
-       MMPLAYER_RETURN_IF_FAIL((GST_MESSAGE_TYPE(buffering_msg) == GST_MESSAGE_BUFFERING));
 
-       if (position > (gint64)(streamer->buffering_req.prebuffer_time * GST_MSECOND))
-               streamer->buffering_req.is_pre_buffering = FALSE;
+       if (buffering_msg) {
+               if (position > (gint64)(streamer->buffering_req.prebuffer_time * GST_MSECOND))
+                       streamer->buffering_req.is_pre_buffering = FALSE;
 
-       streaming_update_buffering_status(streamer, buffering_msg, position);
+               __streaming_update_buffering_status(streamer, buffering_msg, position);
 
-       if (!streamer->need_update)
-               return;
+               if (!streamer->need_update)
+                       return;
+       }
 
        streamer->need_update = FALSE;
-       streaming_update_buffer_setting(streamer, buffering_msg, content_size, position, duration);
+       __streaming_update_buffer_setting(streamer, buffering_msg, content_size, position, duration);
 
        return;
 }