shithub: libvpx

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VP9 SVC: Add enum type for framedrop_mode.

Change-Id: I3d4697b00729553e0860762b9264e29b8a89b9d4

--- a/test/datarate_test.cc

+++ b/test/datarate_test.cc

@@ -1455,7 +1455,7 @@

       if (constrained_framedrop_) {

         vpx_svc_frame_drop_t svc_drop_frame;

-        svc_drop_frame.framedrop_mode = 1;

+        svc_drop_frame.framedrop_mode = CONSTRAINED_LAYER_DROP;

         for (i = 0; i < number_spatial_layers_; i++)

           svc_drop_frame.framedrop_thresh[i] = 30;

         encoder->Control(VP9E_SET_SVC_FRAME_DROP_LAYER, &svc_drop_frame);

--- a/vp9/encoder/vp9_encoder.c

+++ b/vp9/encoder/vp9_encoder.c

@@ -4624,12 +4624,14 @@

       (!cpi->use_svc ||

        !cpi->svc.layer_context[cpi->svc.temporal_layer_id].is_key_frame)) {

     int svc_prev_layer_dropped = 0;

-    // In the contrained framedrop mode for svc (framedrop_mode = 1), if the

-    // previous spatial layer was dropped, drop the current spatial layer.

+    // In the contrained framedrop mode for svc (framedrop_mode =

+    // CONSTRAINED_LAYER_DROP), if the previous spatial layer was dropped, drop

+    // the current spatial layer.

     if (cpi->use_svc && cpi->svc.spatial_layer_id > 0 &&

         cpi->svc.drop_spatial_layer[cpi->svc.spatial_layer_id - 1])

       svc_prev_layer_dropped = 1;

-    if ((svc_prev_layer_dropped && cpi->svc.framedrop_mode) ||

+    if ((svc_prev_layer_dropped &&

+         cpi->svc.framedrop_mode == CONSTRAINED_LAYER_DROP) ||

         vp9_rc_drop_frame(cpi)) {

       vp9_rc_postencode_update_drop_frame(cpi);

       cpi->ext_refresh_frame_flags_pending = 0;

--- a/vp9/encoder/vp9_ratectrl.c

+++ b/vp9/encoder/vp9_ratectrl.c

@@ -395,14 +395,14 @@

 static int check_buffer(VP9_COMP *cpi, int drop_mark) {

   SVC *svc = &cpi->svc;

-  if (!cpi->use_svc || !cpi->svc.framedrop_mode) {

+  if (!cpi->use_svc || cpi->svc.framedrop_mode == LAYER_DROP) {

     RATE_CONTROL *const rc = &cpi->rc;

     return (rc->buffer_level <= drop_mark);

   } else {

     int i;

-    // For SVC in the constrained framedrop mode (svc->framedrop_mode = 1):

-    // the condition on buffer (to drop frame) is checked on current and

-    // upper spatial layers.

+    // For SVC in the constrained framedrop mode (svc->framedrop_mode =

+    // CONSTRAINED_LAYER_DROP): the condition on buffer (to drop frame) is

+    // checked on current and upper spatial layers.

     for (i = svc->spatial_layer_id; i < svc->number_spatial_layers; ++i) {

       const int layer = LAYER_IDS_TO_IDX(i, svc->temporal_layer_id,

                                          svc->number_temporal_layers);

--- a/vp9/encoder/vp9_svc_layercontext.c

+++ b/vp9/encoder/vp9_svc_layercontext.c

@@ -39,7 +39,7 @@

   svc->non_reference_frame = 0;

   svc->skip_enhancement_layer = 0;

   svc->disable_inter_layer_pred = INTER_LAYER_PRED_ON;

-  svc->framedrop_mode = 0;

+  svc->framedrop_mode = LAYER_DROP;

   for (i = 0; i < REF_FRAMES; ++i) svc->ref_frame_index[i] = -1;

   for (sl = 0; sl < oxcf->ss_number_layers; ++sl) {

--- a/vp9/encoder/vp9_svc_layercontext.h

+++ b/vp9/encoder/vp9_svc_layercontext.h

@@ -115,7 +115,7 @@

   int last_layer_dropped[VPX_MAX_LAYERS];

   int drop_spatial_layer[VPX_MAX_LAYERS];

   int framedrop_thresh[VPX_MAX_LAYERS];

-  int framedrop_mode;

+  SVC_LAYER_DROP_MODE framedrop_mode;

   INTER_LAYER_PRED disable_inter_layer_pred;

 } SVC;

--- a/vpx/vp8cx.h

+++ b/vpx/vp8cx.h

@@ -748,7 +748,7 @@

   int temporal_layer_id; /**< Temporal layer id number. */

 } vpx_svc_layer_id_t;

-/*!\brief  vp9 svc frame flag parameters.

+/*!\brief vp9 svc frame flag parameters.

  *

  * This defines the frame flags and buffer indices for each spatial layer for

  * svc encoding.

@@ -763,8 +763,19 @@

   int alt_fb_idx[VPX_TS_MAX_LAYERS];  /**< Altref buffer index. */

 } vpx_svc_ref_frame_config_t;

-/*!\brief  vp9 svc frame dropping parameters.

+/*!\brief VP9 svc frame dropping mode.

  *

+ * This defines the frame drop mode for SVC.

+ *

+ */

+typedef enum {

+  LAYER_DROP, /**< Any spatial layer can drop. */

+  CONSTRAINED_LAYER_DROP

+  /**< Upper layers are constrained to drop if current layer drops. */

+} SVC_LAYER_DROP_MODE;

+

+/*!\brief vp9 svc frame dropping parameters.

+ *

  * This defines the frame drop thresholds for each spatial layer, and the

  * the frame dropping mode: 0 = layer based frame dropping (default),

  * 1 = constrained dropping where current layer drop forces all upper

@@ -772,7 +783,8 @@

  */

 typedef struct vpx_svc_frame_drop {

   int framedrop_thresh[VPX_SS_MAX_LAYERS]; /**< Frame drop thresholds */

-  int framedrop_mode; /**< Layer-based or constrained dropping. */

+  SVC_LAYER_DROP_MODE

+  framedrop_mode; /**< Layer-based or constrained dropping. */

 } vpx_svc_frame_drop_t;

 /*!\cond */