Add a codec control option to tune for screen content.

Change-Id: I12b0b0a06750cb9a5f1bdc3368deb44137acc9a3

vp9/encoder/vp9_encoder.h

@@ -232,6 +232,7 @@ typedef struct VP9EncoderConfig {
 #endif
 
   vp8e_tuning tuning;
+  vp9e_tune_content content;
 } VP9EncoderConfig;
 
 static INLINE int is_lossless_requested(const VP9EncoderConfig *cfg) {

vp9/vp9_cx_iface.c

@@ -40,6 +40,7 @@ struct vp9_extracfg {
   AQ_MODE                     aq_mode;
   unsigned int                frame_periodic_boost;
   BIT_DEPTH                   bit_depth;
+  vp9e_tune_content           content;
 };
 
 struct extraconfig_map {
@@ -219,6 +220,8 @@ static vpx_codec_err_t validate_config(vpx_codec_alg_priv_t *ctx,
   RANGE_CHECK_HI(extra_cfg, arnr_strength, 6);
   RANGE_CHECK(extra_cfg, arnr_type, 1, 3);
   RANGE_CHECK(extra_cfg, cq_level, 0, 63);
+  RANGE_CHECK(extra_cfg, content,
+              VP9E_CONTENT_DEFAULT, VP9E_CONTENT_INVALID - 1);
 
   // TODO(yaowu): remove this when ssim tuning is implemented for vp9
   if (extra_cfg->tuning == VP8_TUNE_SSIM)
@@ -397,6 +400,7 @@ static vpx_codec_err_t set_encoder_config(
   oxcf->arnr_type       = extra_cfg->arnr_type;
 
   oxcf->tuning = extra_cfg->tuning;
+  oxcf->content = extra_cfg->content;
 
   oxcf->tile_columns = extra_cfg->tile_columns;
   oxcf->tile_rows    = extra_cfg->tile_rows;
@@ -1213,6 +1217,13 @@ static vpx_codec_err_t ctrl_set_svc_parameters(vpx_codec_alg_priv_t *ctx,
   return VPX_CODEC_OK;
 }
 
+static vpx_codec_err_t ctrl_set_tune_content(vpx_codec_alg_priv_t *ctx,
+                                             va_list args) {
+  struct vp9_extracfg extra_cfg = ctx->extra_cfg;
+  ctx->extra_cfg.content = CAST(VP9E_SET_TUNE_CONTENT, args);
+  return update_extra_cfg(ctx, &extra_cfg);
+}
+
 static vpx_codec_ctrl_fn_map_t encoder_ctrl_maps[] = {
   {VP8_COPY_REFERENCE,                ctrl_copy_reference},
   {VP8E_UPD_ENTROPY,                  ctrl_update_entropy},
@@ -1245,6 +1256,7 @@ static vpx_codec_ctrl_fn_map_t encoder_ctrl_maps[] = {
   {VP9E_SET_SVC,                      ctrl_set_svc},
   {VP9E_SET_SVC_PARAMETERS,           ctrl_set_svc_parameters},
   {VP9E_SET_SVC_LAYER_ID,             ctrl_set_svc_layer_id},
+  {VP9E_SET_TUNE_CONTENT,             ctrl_set_tune_content},
 
   // Getters
   {VP8E_GET_LAST_QUANTIZER,           ctrl_get_quantizer},

vpx/vp8cx.h

@@ -205,7 +205,8 @@ enum vp8e_enc_control_id {
    *                     layer and 0..#vpx_codec_enc_cfg::ts_number_layers for
    *                     temporal layer.
    */
-  VP9E_SET_SVC_LAYER_ID
+  VP9E_SET_SVC_LAYER_ID,
+  VP9E_SET_TUNE_CONTENT
 };
 
 /*!\brief vpx 1-D scaling mode
@@ -277,6 +278,12 @@ typedef enum {
   VP8_EIGHT_TOKENPARTITION = 3
 } vp8e_token_partitions;
 
+/*!brief VP9 encoder content type */
+typedef enum {
+  VP9E_CONTENT_DEFAULT,
+  VP9E_CONTENT_SCREEN,
+  VP9E_CONTENT_INVALID
+} vp9e_tune_content;
 
 /*!\brief VP8 model tuning parameters
  *
@@ -370,6 +377,7 @@ VPX_CTRL_USE_TYPE(VP9E_SET_AQ_MODE, unsigned int)
 
 VPX_CTRL_USE_TYPE(VP9E_SET_FRAME_PERIODIC_BOOST, unsigned int)
 
+VPX_CTRL_USE_TYPE(VP9E_SET_TUNE_CONTENT, int) /* vp9e_tune_content */
 /*! @} - end defgroup vp8_encoder */
 #ifdef __cplusplus
 }  // extern "C"