sequence callback function (#25)

* seq callback function

* bug fix

* changing some params for callback

* review comments

* switch case

* fixing minor border cases

[ROCm/rocdecode commit: 47ede638a3]

projects/rocdecode/src/parser/hevc_parser.cpp

@@ -155,6 +155,90 @@ ParserResult HEVCVideoParser::Init() {
     return PARSER_OK;
 }
 
+void HEVCVideoParser::FillSeqCallbackFn(SpsData* sps_data) {
+    video_format_params_.codec = rocDecVideoCodec_HEVC;
+    // TODO: Check the two frame_rate - setting default
+    video_format_params_.frame_rate.numerator = 0;
+    video_format_params_.frame_rate.denominator = 0;
+    video_format_params_.bit_depth_luma_minus8 = sps_data->bit_depth_luma_minus8;
+    video_format_params_.bit_depth_chroma_minus8 = sps_data->bit_depth_chroma_minus8;
+    if (sps_data->profile_tier_level.general_progressive_source_flag && !sps_data->profile_tier_level.general_interlaced_source_flag)
+        video_format_params_.progressive_sequence = 1;
+    else if (!sps_data->profile_tier_level.general_progressive_source_flag && sps_data->profile_tier_level.general_interlaced_source_flag)
+        video_format_params_.progressive_sequence = 0;
+    else // default value
+        video_format_params_.progressive_sequence = 1;
+    // TODO: Change for different layers, using 0th layer currently
+    video_format_params_.min_num_decode_surfaces = sps_data->sps_max_dec_pic_buffering_minus1[0] + 1;
+    video_format_params_.coded_width = sps_data->pic_width_in_luma_samples;
+    video_format_params_.coded_height = sps_data->pic_height_in_luma_samples;
+    video_format_params_.chroma_format = static_cast<rocDecVideoChromaFormat>(sps_data->chroma_format_idc);
+    int sub_width_c, sub_height_c;
+    switch (video_format_params_.chroma_format) {
+        case rocDecVideoChromaFormat_Monochrome: {
+            sub_width_c = 1;
+            sub_height_c = 1;
+            break;
+        }
+        case rocDecVideoChromaFormat_420: {
+            sub_width_c = 2;
+            sub_height_c = 2;
+            break;
+        }
+        case rocDecVideoChromaFormat_422: {
+            sub_width_c = 2;
+            sub_height_c = 1;
+            break;
+        }
+        case rocDecVideoChromaFormat_444: {
+            sub_width_c = 1;
+            sub_height_c = 1;
+            break;
+        }
+        default:
+            ERR(STR("Error: Sequence Callback function - Chroma Format is not supported"));
+            return;  
+    }
+    if(sps_data->conformance_window_flag) {
+        video_format_params_.display_area.left = sub_width_c * sps_data->conf_win_left_offset;
+        video_format_params_.display_area.top = sub_height_c * sps_data->conf_win_top_offset;
+        video_format_params_.display_area.right = sps_data->pic_width_in_luma_samples - (sub_width_c * sps_data->conf_win_right_offset);
+        video_format_params_.display_area.bottom = sps_data->pic_height_in_luma_samples - (sub_height_c * sps_data->conf_win_bottom_offset);
+    } 
+    else { // default values
+        video_format_params_.display_area.left = 0;
+        video_format_params_.display_area.top = 0;
+        video_format_params_.display_area.right = video_format_params_.coded_width;
+        video_format_params_.display_area.bottom = video_format_params_.coded_height;
+    }
+    
+    // TODO: Check bitrate - setting default
+    video_format_params_.bitrate = 0;
+    if (sps_data->vui_parameters_present_flag) {
+        if (sps_data->vui_parameters.aspect_ratio_info_present_flag) {
+            video_format_params_.display_aspect_ratio.x = sps_data->vui_parameters.sar_width;
+            video_format_params_.display_aspect_ratio.y = sps_data->vui_parameters.sar_height;
+        }
+        else { // default values
+            video_format_params_.display_aspect_ratio.x = 0;
+            video_format_params_.display_aspect_ratio.y = 0;
+        }
+    }
+    if (sps_data->vui_parameters_present_flag) {
+        video_format_params_.video_signal_description.video_format = sps_data->vui_parameters.video_format;
+        video_format_params_.video_signal_description.video_full_range_flag = sps_data->vui_parameters.video_full_range_flag;
+        video_format_params_.video_signal_description.color_primaries = sps_data->vui_parameters.colour_primaries;
+        video_format_params_.video_signal_description.transfer_characteristics = sps_data->vui_parameters.transfer_characteristics;
+        video_format_params_.video_signal_description.matrix_coefficients = sps_data->vui_parameters.matrix_coeffs;
+        video_format_params_.video_signal_description.reserved_zero_bits = 0;
+    }
+    // TODO: check seqhdr_data_length
+    video_format_params_.seqhdr_data_length = 0;
+
+    // callback function with RocdecVideoFormat params filled out
+    pfn_sequece_cb_ = PFNVIDSEQUENCECALLBACK(&video_format_params_);
+}
+
 bool HEVCVideoParser::ParseFrameData(const uint8_t* p_stream, uint32_t frame_data_size) {
     int ret = PARSER_OK;
     NalUnitHeader nal_unit_header;
@@ -1060,11 +1144,13 @@ bool HEVCVideoParser::ParseSliceHeader(uint32_t nal_unit_type, uint8_t *nalu, si
     m_active_vps_id_ = sps_ptr->sps_video_parameter_set_id;
 
     // Check video dimension change
-    if ( pic_width_ != sps_ptr->pic_width_in_luma_samples || pic_height_ != sps_ptr->pic_height_in_luma_samples)
+    if ( pic_width_ != sps_ptr->pic_width_in_luma_samples || pic_height_ != sps_ptr->pic_height_in_luma_samples) {
-    {
         pic_width_ = sps_ptr->pic_width_in_luma_samples;
         pic_height_ = sps_ptr->pic_height_in_luma_samples;
         pic_dimension_changed_ = true;  // Note: clear this flag after the actions with size change are taken.
+        
+        // called to fill structure RocdecVideoFormat and callback function if pic_dimensions_changed
+        FillSeqCallbackFn(sps_ptr);
     }
 
     if (!m_sh_->first_slice_segment_in_pic_flag) {

projects/rocdecode/src/parser/hevc_parser.h

@@ -819,4 +819,7 @@ private:
      * \return Returns pointer to the allocated memory for <tt>SliceHeaderData</tt>
      */
     SliceHeaderData* AllocSliceHeader();
+
+    // functions to fill structures for callback functions
+    void FillSeqCallbackFn(SpsData* sps_data);
 };

projects/rocdecode/src/parser/roc_video_parser.h

@@ -55,6 +55,8 @@ protected:
     uint32_t pic_width_;
     uint32_t pic_height_;
     bool pic_dimension_changed_;
+
+    RocdecVideoFormat video_format_params_;
 };
 
 enum ParserSeekOrigin {