| /* |
| * GStreamer |
| * Copyright (C) 2011 Robert Swain <robert.swain@collabora.co.uk> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| * Alternatively, the contents of this file may be used under the |
| * GNU Lesser General Public License Version 2.1 (the "LGPL"), in |
| * which case the following provisions apply instead of the ones |
| * mentioned above: |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-fieldanalysis |
| * |
| * Analyse fields from video buffers to identify whether the buffers are |
| * progressive/telecined/interlaced and, if telecined, the telecine pattern |
| * used. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v uridecodebin uri=/path/to/foo.bar ! fieldanalysis ! deinterlace ! videoconvert ! autovideosink |
| * ]| This pipeline will analyse a video stream with default metrics and thresholds and output progressive frames. |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <gst/gst.h> |
| #include <gst/video/video.h> |
| #include <string.h> |
| #include <stdlib.h> /* for abs() */ |
| |
| #include "gstfieldanalysis.h" |
| #include "gstfieldanalysisorc.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_field_analysis_debug); |
| #define GST_CAT_DEFAULT gst_field_analysis_debug |
| |
| #define DEFAULT_FIELD_METRIC GST_FIELDANALYSIS_SSD |
| #define DEFAULT_FRAME_METRIC GST_FIELDANALYSIS_5_TAP |
| #define DEFAULT_NOISE_FLOOR 16 |
| #define DEFAULT_FIELD_THRESH 0.08f |
| #define DEFAULT_FRAME_THRESH 0.002f |
| #define DEFAULT_COMB_METHOD METHOD_5_TAP |
| #define DEFAULT_SPATIAL_THRESH 9 |
| #define DEFAULT_BLOCK_WIDTH 16 |
| #define DEFAULT_BLOCK_HEIGHT 16 |
| #define DEFAULT_BLOCK_THRESH 80 |
| #define DEFAULT_IGNORED_LINES 2 |
| |
| enum |
| { |
| PROP_0, |
| PROP_FIELD_METRIC, |
| PROP_FRAME_METRIC, |
| PROP_NOISE_FLOOR, |
| PROP_FIELD_THRESH, |
| PROP_FRAME_THRESH, |
| PROP_COMB_METHOD, |
| PROP_SPATIAL_THRESH, |
| PROP_BLOCK_WIDTH, |
| PROP_BLOCK_HEIGHT, |
| PROP_BLOCK_THRESH, |
| PROP_IGNORED_LINES |
| }; |
| |
| static GstStaticPadTemplate sink_factory = |
| GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{YUY2,UYVY,Y42B,I420,YV12}"))); |
| |
| static GstStaticPadTemplate src_factory = |
| GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{YUY2,UYVY,Y42B,I420,YV12}"))); |
| |
| G_DEFINE_TYPE (GstFieldAnalysis, gst_field_analysis, GST_TYPE_ELEMENT); |
| #define parent_class gst_field_analysis_parent_class |
| |
| static void gst_field_analysis_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_field_analysis_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static gboolean gst_field_analysis_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event); |
| static GstFlowReturn gst_field_analysis_chain (GstPad * pad, GstObject * parent, |
| GstBuffer * buf); |
| static GstStateChangeReturn gst_field_analysis_change_state (GstElement * |
| element, GstStateChange transition); |
| static void gst_field_analysis_finalize (GObject * self); |
| |
| static GQueue *gst_field_analysis_flush_frames (GstFieldAnalysis * filter); |
| |
| typedef enum |
| { |
| GST_FIELDANALYSIS_SAD, |
| GST_FIELDANALYSIS_SSD, |
| GST_FIELDANALYSIS_3_TAP |
| } GstFieldAnalysisFieldMetric; |
| |
| #define GST_TYPE_FIELDANALYSIS_FIELD_METRIC (gst_fieldanalysis_field_metric_get_type()) |
| static GType |
| gst_fieldanalysis_field_metric_get_type (void) |
| { |
| static GType fieldanalysis_field_metric_type = 0; |
| |
| if (!fieldanalysis_field_metric_type) { |
| static const GEnumValue fieldanalysis_field_metrics[] = { |
| {GST_FIELDANALYSIS_SAD, "Sum of Absolute Differences", "sad"}, |
| {GST_FIELDANALYSIS_SSD, "Sum of Squared Differences", "ssd"}, |
| {GST_FIELDANALYSIS_3_TAP, "Difference of 3-tap [1,4,1] Horizontal Filter", |
| "3-tap"}, |
| {0, NULL, NULL}, |
| }; |
| |
| fieldanalysis_field_metric_type = |
| g_enum_register_static ("GstFieldAnalysisFieldMetric", |
| fieldanalysis_field_metrics); |
| } |
| |
| return fieldanalysis_field_metric_type; |
| } |
| |
| typedef enum |
| { |
| GST_FIELDANALYSIS_5_TAP, |
| GST_FIELDANALYSIS_WINDOWED_COMB |
| } GstFieldAnalysisFrameMetric; |
| |
| #define GST_TYPE_FIELDANALYSIS_FRAME_METRIC (gst_fieldanalysis_frame_metric_get_type()) |
| static GType |
| gst_fieldanalysis_frame_metric_get_type (void) |
| { |
| static GType fieldanalysis_frame_metric_type = 0; |
| |
| if (!fieldanalysis_frame_metric_type) { |
| static const GEnumValue fieldanalyis_frame_metrics[] = { |
| {GST_FIELDANALYSIS_5_TAP, "5-tap [1,-3,4,-3,1] Vertical Filter", "5-tap"}, |
| {GST_FIELDANALYSIS_WINDOWED_COMB, |
| "Windowed Comb Detection (not optimised)", |
| "windowed-comb"}, |
| {0, NULL, NULL}, |
| }; |
| |
| fieldanalysis_frame_metric_type = |
| g_enum_register_static ("GstFieldAnalysisFrameMetric", |
| fieldanalyis_frame_metrics); |
| } |
| |
| return fieldanalysis_frame_metric_type; |
| } |
| |
| #define GST_TYPE_FIELDANALYSIS_COMB_METHOD (gst_fieldanalysis_comb_method_get_type()) |
| static GType |
| gst_fieldanalysis_comb_method_get_type (void) |
| { |
| static GType fieldanalysis_comb_method_type = 0; |
| |
| if (!fieldanalysis_comb_method_type) { |
| static const GEnumValue fieldanalyis_comb_methods[] = { |
| {METHOD_32DETECT, |
| "Difference to above sample in same field small and difference to sample in other field large", |
| "32-detect"}, |
| {METHOD_IS_COMBED, |
| "Differences between current sample and the above/below samples in other field multiplied together, larger than squared spatial threshold (from Tritical's isCombed)", |
| "isCombed"}, |
| {METHOD_5_TAP, |
| "5-tap [1,-3,4,-3,1] vertical filter result is larger than spatial threshold*6", |
| "5-tap"}, |
| {0, NULL, NULL}, |
| }; |
| |
| fieldanalysis_comb_method_type = |
| g_enum_register_static ("FieldAnalysisCombMethod", |
| fieldanalyis_comb_methods); |
| } |
| |
| return fieldanalysis_comb_method_type; |
| } |
| |
| static void |
| gst_field_analysis_class_init (GstFieldAnalysisClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| |
| gobject_class->set_property = gst_field_analysis_set_property; |
| gobject_class->get_property = gst_field_analysis_get_property; |
| gobject_class->finalize = gst_field_analysis_finalize; |
| |
| g_object_class_install_property (gobject_class, PROP_FIELD_METRIC, |
| g_param_spec_enum ("field-metric", "Field Metric", |
| "Metric to be used for comparing same parity fields to decide if they are a repeated field for telecine", |
| GST_TYPE_FIELDANALYSIS_FIELD_METRIC, DEFAULT_FIELD_METRIC, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_FRAME_METRIC, |
| g_param_spec_enum ("frame-metric", "Frame Metric", |
| "Metric to be used for comparing opposite parity fields to decide if they are a progressive frame", |
| GST_TYPE_FIELDANALYSIS_FRAME_METRIC, DEFAULT_FRAME_METRIC, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_NOISE_FLOOR, |
| g_param_spec_uint ("noise-floor", "Noise Floor", |
| "Noise floor for appropriate metrics (per-pixel metric values with a score less than this will be ignored)", |
| 0, G_MAXUINT32, |
| DEFAULT_NOISE_FLOOR, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_FIELD_THRESH, |
| g_param_spec_float ("field-threshold", "Field Threshold", |
| "Threshold for field metric decisions", 0.0f, G_MAXFLOAT, |
| DEFAULT_FIELD_THRESH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_FRAME_THRESH, |
| g_param_spec_float ("frame-threshold", "Frame Threshold", |
| "Threshold for frame metric decisions", 0.0f, G_MAXFLOAT, |
| DEFAULT_FRAME_THRESH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_COMB_METHOD, |
| g_param_spec_enum ("comb-method", "Comb-detection Method", |
| "Metric to be used for identifying comb artifacts if using windowed comb detection", |
| GST_TYPE_FIELDANALYSIS_COMB_METHOD, DEFAULT_COMB_METHOD, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_SPATIAL_THRESH, |
| g_param_spec_int64 ("spatial-threshold", "Spatial Combing Threshold", |
| "Threshold for combing metric decisions", 0, G_MAXINT64, |
| DEFAULT_SPATIAL_THRESH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_BLOCK_WIDTH, |
| g_param_spec_uint64 ("block-width", "Block width", |
| "Block width for windowed comb detection", 1, G_MAXUINT64, |
| DEFAULT_BLOCK_WIDTH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_BLOCK_HEIGHT, |
| g_param_spec_uint64 ("block-height", "Block height", |
| "Block height for windowed comb detection", 0, G_MAXUINT64, |
| DEFAULT_BLOCK_HEIGHT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_BLOCK_THRESH, |
| g_param_spec_uint64 ("block-threshold", "Block threshold", |
| "Block threshold for windowed comb detection", 0, G_MAXUINT64, |
| DEFAULT_BLOCK_THRESH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_IGNORED_LINES, |
| g_param_spec_uint64 ("ignored-lines", "Ignored lines", |
| "Ignore this many lines from the top and bottom for windowed comb detection", |
| 2, G_MAXUINT64, DEFAULT_IGNORED_LINES, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| gstelement_class->change_state = |
| GST_DEBUG_FUNCPTR (gst_field_analysis_change_state); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "Video field analysis", |
| "Filter/Analysis/Video", |
| "Analyse fields from video frames to identify if they are progressive/telecined/interlaced", |
| "Robert Swain <robert.swain@collabora.co.uk>"); |
| |
| gst_element_class_add_static_pad_template (gstelement_class, &src_factory); |
| gst_element_class_add_static_pad_template (gstelement_class, &sink_factory); |
| |
| } |
| |
| static gfloat same_parity_sad (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]); |
| static gfloat same_parity_ssd (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]); |
| static gfloat same_parity_3_tap (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]); |
| static gfloat opposite_parity_5_tap (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]); |
| static guint64 block_score_for_row_32detect (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2], guint8 * base_fj, guint8 * base_fjp1); |
| static guint64 block_score_for_row_iscombed (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2], guint8 * base_fj, guint8 * base_fjp1); |
| static guint64 block_score_for_row_5_tap (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2], guint8 * base_fj, guint8 * base_fjp1); |
| static gfloat opposite_parity_windowed_comb (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]); |
| |
| static void |
| gst_field_analysis_clear_frames (GstFieldAnalysis * filter) |
| { |
| GST_DEBUG_OBJECT (filter, "Clearing %d frames", filter->nframes); |
| while (filter->nframes) { |
| gst_video_frame_unmap (&filter->frames[filter->nframes - 1].frame); |
| filter->nframes--; |
| } |
| } |
| |
| static void |
| gst_field_analysis_reset (GstFieldAnalysis * filter) |
| { |
| gst_field_analysis_clear_frames (filter); |
| GST_DEBUG_OBJECT (filter, "Resetting context"); |
| memset (filter->frames, 0, 2 * sizeof (FieldAnalysisHistory)); |
| filter->is_telecine = FALSE; |
| filter->first_buffer = TRUE; |
| gst_video_info_init (&filter->vinfo); |
| g_free (filter->comb_mask); |
| filter->comb_mask = NULL; |
| g_free (filter->block_scores); |
| filter->block_scores = NULL; |
| } |
| |
| static void |
| gst_field_analysis_init (GstFieldAnalysis * filter) |
| { |
| filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); |
| gst_pad_set_event_function (filter->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_field_analysis_sink_event)); |
| gst_pad_set_chain_function (filter->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_field_analysis_chain)); |
| |
| filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); |
| |
| gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); |
| gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); |
| |
| filter->nframes = 0; |
| gst_field_analysis_reset (filter); |
| filter->same_field = &same_parity_ssd; |
| filter->field_thresh = DEFAULT_FIELD_THRESH; |
| filter->same_frame = &opposite_parity_5_tap; |
| filter->frame_thresh = DEFAULT_FRAME_THRESH; |
| filter->noise_floor = DEFAULT_NOISE_FLOOR; |
| filter->block_score_for_row = &block_score_for_row_5_tap; |
| filter->spatial_thresh = DEFAULT_SPATIAL_THRESH; |
| filter->block_width = DEFAULT_BLOCK_WIDTH; |
| filter->block_height = DEFAULT_BLOCK_HEIGHT; |
| filter->block_thresh = DEFAULT_BLOCK_THRESH; |
| filter->ignored_lines = DEFAULT_IGNORED_LINES; |
| } |
| |
| static void |
| gst_field_analysis_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstFieldAnalysis *filter = GST_FIELDANALYSIS (object); |
| |
| switch (prop_id) { |
| case PROP_FIELD_METRIC: |
| switch (g_value_get_enum (value)) { |
| case GST_FIELDANALYSIS_SAD: |
| filter->same_field = &same_parity_sad; |
| break; |
| case GST_FIELDANALYSIS_SSD: |
| filter->same_field = &same_parity_ssd; |
| break; |
| case GST_FIELDANALYSIS_3_TAP: |
| filter->same_field = &same_parity_3_tap; |
| break; |
| default: |
| break; |
| } |
| break; |
| case PROP_FRAME_METRIC: |
| switch (g_value_get_enum (value)) { |
| case GST_FIELDANALYSIS_5_TAP: |
| filter->same_frame = &opposite_parity_5_tap; |
| break; |
| case GST_FIELDANALYSIS_WINDOWED_COMB: |
| filter->same_frame = &opposite_parity_windowed_comb; |
| break; |
| default: |
| break; |
| } |
| break; |
| case PROP_NOISE_FLOOR: |
| filter->noise_floor = g_value_get_uint (value); |
| break; |
| case PROP_FIELD_THRESH: |
| filter->field_thresh = g_value_get_float (value); |
| break; |
| case PROP_FRAME_THRESH: |
| filter->frame_thresh = g_value_get_float (value); |
| break; |
| case PROP_COMB_METHOD: |
| switch (g_value_get_enum (value)) { |
| case METHOD_32DETECT: |
| filter->block_score_for_row = &block_score_for_row_32detect; |
| break; |
| case METHOD_IS_COMBED: |
| filter->block_score_for_row = &block_score_for_row_iscombed; |
| break; |
| case METHOD_5_TAP: |
| filter->block_score_for_row = &block_score_for_row_5_tap; |
| break; |
| default: |
| break; |
| } |
| break; |
| case PROP_SPATIAL_THRESH: |
| filter->spatial_thresh = g_value_get_int64 (value); |
| break; |
| case PROP_BLOCK_WIDTH: |
| filter->block_width = g_value_get_uint64 (value); |
| if (GST_VIDEO_FRAME_WIDTH (&filter->frames[0].frame)) { |
| const gint frame_width = |
| GST_VIDEO_FRAME_WIDTH (&filter->frames[0].frame); |
| if (filter->block_scores) { |
| gsize nbytes = (frame_width / filter->block_width) * sizeof (guint); |
| filter->block_scores = g_realloc (filter->block_scores, nbytes); |
| memset (filter->block_scores, 0, nbytes); |
| } else { |
| filter->block_scores = |
| g_malloc0 ((frame_width / filter->block_width) * sizeof (guint)); |
| } |
| } |
| break; |
| case PROP_BLOCK_HEIGHT: |
| filter->block_height = g_value_get_uint64 (value); |
| break; |
| case PROP_BLOCK_THRESH: |
| filter->block_thresh = g_value_get_uint64 (value); |
| break; |
| case PROP_IGNORED_LINES: |
| filter->ignored_lines = g_value_get_uint64 (value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_field_analysis_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstFieldAnalysis *filter = GST_FIELDANALYSIS (object); |
| |
| switch (prop_id) { |
| case PROP_FIELD_METRIC: |
| { |
| GstFieldAnalysisFieldMetric metric = DEFAULT_FIELD_METRIC; |
| if (filter->same_field == &same_parity_sad) { |
| metric = GST_FIELDANALYSIS_SAD; |
| } else if (filter->same_field == &same_parity_ssd) { |
| metric = GST_FIELDANALYSIS_SSD; |
| } else if (filter->same_field == &same_parity_3_tap) { |
| metric = GST_FIELDANALYSIS_3_TAP; |
| } |
| g_value_set_enum (value, metric); |
| break; |
| } |
| case PROP_FRAME_METRIC: |
| { |
| GstFieldAnalysisFrameMetric metric = DEFAULT_FRAME_METRIC; |
| if (filter->same_frame == &opposite_parity_5_tap) { |
| metric = GST_FIELDANALYSIS_5_TAP; |
| } else if (filter->same_frame == &opposite_parity_windowed_comb) { |
| metric = GST_FIELDANALYSIS_WINDOWED_COMB; |
| } |
| g_value_set_enum (value, metric); |
| break; |
| } |
| case PROP_NOISE_FLOOR: |
| g_value_set_uint (value, filter->noise_floor); |
| break; |
| case PROP_FIELD_THRESH: |
| g_value_set_float (value, filter->field_thresh); |
| break; |
| case PROP_FRAME_THRESH: |
| g_value_set_float (value, filter->frame_thresh); |
| break; |
| case PROP_COMB_METHOD: |
| { |
| FieldAnalysisCombMethod method = DEFAULT_COMB_METHOD; |
| if (filter->block_score_for_row == &block_score_for_row_32detect) { |
| method = METHOD_32DETECT; |
| } else if (filter->block_score_for_row == &block_score_for_row_iscombed) { |
| method = METHOD_IS_COMBED; |
| } else if (filter->block_score_for_row == &block_score_for_row_5_tap) { |
| method = METHOD_5_TAP; |
| } |
| g_value_set_enum (value, method); |
| break; |
| } |
| case PROP_SPATIAL_THRESH: |
| g_value_set_int64 (value, filter->spatial_thresh); |
| break; |
| case PROP_BLOCK_WIDTH: |
| g_value_set_uint64 (value, filter->block_width); |
| break; |
| case PROP_BLOCK_HEIGHT: |
| g_value_set_uint64 (value, filter->block_height); |
| break; |
| case PROP_BLOCK_THRESH: |
| g_value_set_uint64 (value, filter->block_thresh); |
| break; |
| case PROP_IGNORED_LINES: |
| g_value_set_uint64 (value, filter->ignored_lines); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_field_analysis_update_format (GstFieldAnalysis * filter, GstCaps * caps) |
| { |
| gint width; |
| GQueue *outbufs; |
| GstVideoInfo vinfo; |
| |
| if (!gst_video_info_from_caps (&vinfo, caps)) { |
| GST_ERROR_OBJECT (filter, "Invalid caps: %" GST_PTR_FORMAT, caps); |
| return; |
| } |
| |
| /* if format is unchanged in our eyes, don't update the context */ |
| if ((GST_VIDEO_INFO_WIDTH (&filter->vinfo) == GST_VIDEO_INFO_WIDTH (&vinfo)) |
| && (GST_VIDEO_INFO_HEIGHT (&filter->vinfo) == |
| GST_VIDEO_INFO_HEIGHT (&vinfo)) |
| && (GST_VIDEO_INFO_COMP_OFFSET (&filter->vinfo, 0) == |
| GST_VIDEO_INFO_COMP_OFFSET (&vinfo, 0)) |
| && (GST_VIDEO_INFO_COMP_PSTRIDE (&filter->vinfo, 0) == |
| GST_VIDEO_INFO_COMP_PSTRIDE (&vinfo, 0)) |
| && (GST_VIDEO_INFO_COMP_STRIDE (&filter->vinfo, 0) == |
| GST_VIDEO_INFO_COMP_STRIDE (&vinfo, 0))) |
| return; |
| |
| /* format changed - process and push buffers before updating context */ |
| |
| GST_OBJECT_LOCK (filter); |
| filter->flushing = TRUE; |
| outbufs = gst_field_analysis_flush_frames (filter); |
| GST_OBJECT_UNLOCK (filter); |
| |
| if (outbufs) { |
| while (g_queue_get_length (outbufs)) |
| gst_pad_push (filter->srcpad, g_queue_pop_head (outbufs)); |
| } |
| |
| GST_OBJECT_LOCK (filter); |
| filter->flushing = FALSE; |
| |
| filter->vinfo = vinfo; |
| width = GST_VIDEO_INFO_WIDTH (&filter->vinfo); |
| |
| /* update allocations for metric scores */ |
| if (filter->comb_mask) { |
| filter->comb_mask = g_realloc (filter->comb_mask, width); |
| } else { |
| filter->comb_mask = g_malloc (width); |
| } |
| if (filter->block_scores) { |
| gsize nbytes = (width / filter->block_width) * sizeof (guint); |
| filter->block_scores = g_realloc (filter->block_scores, nbytes); |
| memset (filter->block_scores, 0, nbytes); |
| } else { |
| filter->block_scores = |
| g_malloc0 ((width / filter->block_width) * sizeof (guint)); |
| } |
| |
| GST_OBJECT_UNLOCK (filter); |
| return; |
| } |
| |
| #define FIELD_ANALYSIS_TOP_BOTTOM (1 << 0) |
| #define FIELD_ANALYSIS_BOTTOM_TOP (1 << 1) |
| #define FIELD_ANALYSIS_TOP_MATCH (1 << 2) |
| #define FIELD_ANALYSIS_BOTTOM_MATCH (1 << 3) |
| |
| /* decorate removes a buffer from the internal queue, on which we have a ref, |
| * then makes its metadata writable (could be the same buffer, could be a new |
| * buffer, but either way we have a ref on it), decorates this buffer and |
| * returns it */ |
| static GstBuffer * |
| gst_field_analysis_decorate (GstFieldAnalysis * filter, gboolean tff, |
| gboolean onefield, FieldAnalysisConclusion conclusion, gboolean drop) |
| { |
| GstBuffer *buf = NULL; |
| GstCaps *caps; |
| GstVideoInfo srcpadvinfo, vinfo = filter->vinfo; |
| |
| /* deal with incoming buffer */ |
| if (conclusion > FIELD_ANALYSIS_PROGRESSIVE || filter->is_telecine == TRUE) { |
| filter->is_telecine = conclusion != FIELD_ANALYSIS_INTERLACED; |
| if (conclusion >= FIELD_ANALYSIS_TELECINE_PROGRESSIVE |
| || filter->is_telecine == TRUE) { |
| GST_VIDEO_INFO_INTERLACE_MODE (&vinfo) = GST_VIDEO_INTERLACE_MODE_MIXED; |
| } else { |
| GST_VIDEO_INFO_INTERLACE_MODE (&vinfo) = |
| GST_VIDEO_INTERLACE_MODE_INTERLEAVED; |
| } |
| } else { |
| GST_VIDEO_INFO_INTERLACE_MODE (&vinfo) = |
| GST_VIDEO_INTERLACE_MODE_PROGRESSIVE; |
| } |
| |
| caps = gst_pad_get_current_caps (filter->srcpad); |
| gst_video_info_from_caps (&srcpadvinfo, caps); |
| gst_caps_unref (caps); |
| /* push a caps event on the src pad before pushing the buffer */ |
| if (!gst_video_info_is_equal (&vinfo, &srcpadvinfo)) { |
| gboolean ret = TRUE; |
| |
| caps = gst_video_info_to_caps (&vinfo); |
| GST_OBJECT_UNLOCK (filter); |
| ret = gst_pad_set_caps (filter->srcpad, caps); |
| GST_OBJECT_LOCK (filter); |
| gst_caps_unref (caps); |
| |
| if (!ret) { |
| GST_ERROR_OBJECT (filter, "Could not set pad caps"); |
| return NULL; |
| } |
| } |
| |
| buf = filter->frames[filter->nframes - 1].frame.buffer; |
| gst_video_frame_unmap (&filter->frames[filter->nframes - 1].frame); |
| filter->nframes--; |
| |
| /* set buffer flags */ |
| if (!tff) { |
| GST_BUFFER_FLAG_UNSET (buf, GST_VIDEO_BUFFER_FLAG_TFF); |
| } else if (tff == 1 || (tff == -1 |
| && GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_TFF))) { |
| GST_BUFFER_FLAG_SET (buf, GST_VIDEO_BUFFER_FLAG_TFF); |
| } |
| |
| if (onefield) { |
| GST_BUFFER_FLAG_SET (buf, GST_VIDEO_BUFFER_FLAG_ONEFIELD); |
| } else { |
| GST_BUFFER_FLAG_UNSET (buf, GST_VIDEO_BUFFER_FLAG_ONEFIELD); |
| } |
| |
| if (drop) { |
| GST_BUFFER_FLAG_SET (buf, GST_VIDEO_BUFFER_FLAG_RFF); |
| } else { |
| GST_BUFFER_FLAG_UNSET (buf, GST_VIDEO_BUFFER_FLAG_RFF); |
| } |
| |
| if (conclusion == FIELD_ANALYSIS_PROGRESSIVE |
| || conclusion == FIELD_ANALYSIS_TELECINE_PROGRESSIVE) { |
| GST_BUFFER_FLAG_UNSET (buf, GST_VIDEO_BUFFER_FLAG_INTERLACED); |
| } else { |
| GST_BUFFER_FLAG_SET (buf, GST_VIDEO_BUFFER_FLAG_INTERLACED); |
| } |
| |
| GST_DEBUG_OBJECT (filter, |
| "Pushing buffer with flags: %p, i %d, tff %d, 1f %d, drop %d; conc %d", |
| buf, GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_INTERLACED), |
| GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_TFF), |
| GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_ONEFIELD), |
| GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_RFF), conclusion); |
| |
| return buf; |
| } |
| |
| /* _flush_one does not touch the buffer ref counts directly but _decorate () |
| * has some influence on ref counts - see its annotation for details */ |
| static GstBuffer * |
| gst_field_analysis_flush_one (GstFieldAnalysis * filter, GQueue * outbufs) |
| { |
| GstBuffer *buf = NULL; |
| FieldAnalysis results; |
| |
| if (!filter->nframes) |
| return NULL; |
| |
| GST_DEBUG_OBJECT (filter, "Flushing last frame (nframes %d)", |
| filter->nframes); |
| results = filter->frames[filter->nframes - 1].results; |
| if (results.holding == 1 + TOP_FIELD || results.holding == 1 + BOTTOM_FIELD) { |
| /* should be only one field needed */ |
| buf = |
| gst_field_analysis_decorate (filter, results.holding == 1 + TOP_FIELD, |
| TRUE, results.conclusion, FALSE); |
| } else { |
| /* possibility that both fields are needed */ |
| buf = |
| gst_field_analysis_decorate (filter, -1, FALSE, results.conclusion, |
| !results.holding); |
| } |
| if (buf) { |
| filter->nframes--; |
| if (outbufs) |
| g_queue_push_tail (outbufs, buf); |
| } else { |
| GST_DEBUG_OBJECT (filter, "Error occurred during decoration"); |
| } |
| return buf; |
| } |
| |
| /* _flush_frames () has no direct influence on refcounts and nor does _flush_one, |
| * but _decorate () does and so this function does indirectly */ |
| static GQueue * |
| gst_field_analysis_flush_frames (GstFieldAnalysis * filter) |
| { |
| GQueue *outbufs; |
| |
| if (filter->nframes < 2) |
| return NULL; |
| |
| outbufs = g_queue_new (); |
| |
| while (filter->nframes) |
| gst_field_analysis_flush_one (filter, outbufs); |
| |
| return outbufs; |
| } |
| |
| static gboolean |
| gst_field_analysis_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event) |
| { |
| GstFieldAnalysis *filter = GST_FIELDANALYSIS (parent); |
| gboolean forward; /* should we forward the event? */ |
| gboolean ret = TRUE; |
| |
| GST_LOG_OBJECT (pad, "received %s event: %" GST_PTR_FORMAT, |
| GST_EVENT_TYPE_NAME (event), event); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_SEGMENT: |
| case GST_EVENT_EOS: |
| { |
| /* for both SEGMENT and EOS it is safest to process and push queued |
| * buffers */ |
| GQueue *outbufs; |
| |
| forward = TRUE; |
| |
| GST_OBJECT_LOCK (filter); |
| filter->flushing = TRUE; |
| outbufs = gst_field_analysis_flush_frames (filter); |
| GST_OBJECT_UNLOCK (filter); |
| |
| if (outbufs) { |
| while (g_queue_get_length (outbufs)) |
| gst_pad_push (filter->srcpad, g_queue_pop_head (outbufs)); |
| } |
| |
| GST_OBJECT_LOCK (filter); |
| filter->flushing = FALSE; |
| GST_OBJECT_UNLOCK (filter); |
| break; |
| } |
| case GST_EVENT_FLUSH_STOP: |
| /* if we have any buffers left in the queue, unref them until the queue |
| * is empty */ |
| |
| forward = TRUE; |
| |
| GST_OBJECT_LOCK (filter); |
| gst_field_analysis_reset (filter); |
| GST_OBJECT_UNLOCK (filter); |
| break; |
| case GST_EVENT_CAPS: |
| { |
| GstCaps *caps; |
| |
| forward = FALSE; |
| |
| gst_event_parse_caps (event, &caps); |
| gst_field_analysis_update_format (filter, caps); |
| ret = gst_pad_set_caps (filter->srcpad, caps); |
| gst_event_unref (event); |
| break; |
| } |
| default: |
| forward = TRUE; |
| break; |
| } |
| |
| if (forward) { |
| ret = gst_pad_event_default (pad, parent, event); |
| } |
| |
| return ret; |
| } |
| |
| |
| static gfloat |
| same_parity_sad (GstFieldAnalysis * filter, FieldAnalysisFields (*history)[2]) |
| { |
| gint j; |
| gfloat sum; |
| guint8 *f1j, *f2j; |
| |
| const gint width = GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame); |
| const gint height = GST_VIDEO_FRAME_HEIGHT (&(*history)[0].frame); |
| const gint stride0x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const gint stride1x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, 0) << 1; |
| const guint32 noise_floor = filter->noise_floor; |
| |
| f1j = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, |
| 0) + |
| (*history)[0].parity * GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, |
| 0); |
| f2j = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, |
| 0) + |
| (*history)[1].parity * GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, |
| 0); |
| |
| sum = 0.0f; |
| for (j = 0; j < (height >> 1); j++) { |
| guint32 tempsum = 0; |
| fieldanalysis_orc_same_parity_sad_planar_yuv (&tempsum, f1j, f2j, |
| noise_floor, width); |
| sum += tempsum; |
| f1j += stride0x2; |
| f2j += stride1x2; |
| } |
| |
| return sum / (0.5f * width * height); |
| } |
| |
| static gfloat |
| same_parity_ssd (GstFieldAnalysis * filter, FieldAnalysisFields (*history)[2]) |
| { |
| gint j; |
| gfloat sum; |
| guint8 *f1j, *f2j; |
| |
| const gint width = GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame); |
| const gint height = GST_VIDEO_FRAME_HEIGHT (&(*history)[0].frame); |
| const gint stride0x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const gint stride1x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, 0) << 1; |
| /* noise floor needs to be squared for SSD */ |
| const guint32 noise_floor = filter->noise_floor * filter->noise_floor; |
| |
| f1j = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, |
| 0) + |
| (*history)[0].parity * GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, |
| 0); |
| f2j = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, |
| 0) + |
| (*history)[1].parity * GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, |
| 0); |
| |
| sum = 0.0f; |
| for (j = 0; j < (height >> 1); j++) { |
| guint32 tempsum = 0; |
| fieldanalysis_orc_same_parity_ssd_planar_yuv (&tempsum, f1j, f2j, |
| noise_floor, width); |
| sum += tempsum; |
| f1j += stride0x2; |
| f2j += stride1x2; |
| } |
| |
| return sum / (0.5f * width * height); /* field is half height */ |
| } |
| |
| /* horizontal [1,4,1] diff between fields - is this a good idea or should the |
| * current sample be emphasised more or less? */ |
| static gfloat |
| same_parity_3_tap (GstFieldAnalysis * filter, FieldAnalysisFields (*history)[2]) |
| { |
| gint i, j; |
| gfloat sum; |
| guint8 *f1j, *f2j; |
| |
| const gint width = GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame); |
| const gint height = GST_VIDEO_FRAME_HEIGHT (&(*history)[0].frame); |
| const gint stride0x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const gint stride1x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, 0) << 1; |
| const gint incr = GST_VIDEO_FRAME_COMP_PSTRIDE (&(*history)[0].frame, 0); |
| /* noise floor needs to be *6 for [1,4,1] */ |
| const guint32 noise_floor = filter->noise_floor * 6; |
| |
| f1j = GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, 0) + |
| GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, 0) + |
| (*history)[0].parity * GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, |
| 0); |
| f2j = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, |
| 0) + |
| (*history)[1].parity * GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, |
| 0); |
| |
| sum = 0.0f; |
| for (j = 0; j < (height >> 1); j++) { |
| guint32 tempsum = 0; |
| guint32 diff; |
| |
| /* unroll first as it is a special case */ |
| diff = abs (((f1j[0] << 2) + (f1j[incr] << 1)) |
| - ((f2j[0] << 2) + (f2j[incr] << 1))); |
| if (diff > noise_floor) |
| sum += diff; |
| |
| fieldanalysis_orc_same_parity_3_tap_planar_yuv (&tempsum, f1j, &f1j[incr], |
| &f1j[incr << 1], f2j, &f2j[incr], &f2j[incr << 1], noise_floor, |
| width - 1); |
| sum += tempsum; |
| |
| /* unroll last as it is a special case */ |
| i = width - 1; |
| diff = abs (((f1j[i - incr] << 1) + (f1j[i] << 2)) |
| - ((f2j[i - incr] << 1) + (f2j[i] << 2))); |
| if (diff > noise_floor) |
| sum += diff; |
| |
| f1j += stride0x2; |
| f2j += stride1x2; |
| } |
| |
| return sum / ((6.0f / 2.0f) * width * height); /* 1 + 4 + 1 = 6; field is half height */ |
| } |
| |
| /* vertical [1,-3,4,-3,1] - same as is used in FieldDiff from TIVTC, |
| * tritical's AVISynth IVTC filter */ |
| /* 0th field's parity defines operation */ |
| static gfloat |
| opposite_parity_5_tap (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]) |
| { |
| gint j; |
| gfloat sum; |
| guint8 *fjm2, *fjm1, *fj, *fjp1, *fjp2; |
| guint32 tempsum; |
| |
| const gint width = GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame); |
| const gint height = GST_VIDEO_FRAME_HEIGHT (&(*history)[0].frame); |
| const gint stride0x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const gint stride1x2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, 0) << 1; |
| /* noise floor needs to be *6 for [1,-3,4,-3,1] */ |
| const guint32 noise_floor = filter->noise_floor * 6; |
| |
| sum = 0.0f; |
| |
| /* fj is line j of the combined frame made from the top field even lines of |
| * field 0 and the bottom field odd lines from field 1 |
| * fjp1 is one line down from fj |
| * fjm2 is two lines up from fj |
| * fj with j == 0 is the 0th line of the top field |
| * fj with j == 1 is the 0th line of the bottom field or the 1st field of |
| * the frame*/ |
| |
| /* unroll first line as it is a special case */ |
| if ((*history)[0].parity == TOP_FIELD) { |
| fj = GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, 0); |
| fjp1 = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, 0); |
| fjp2 = fj + stride0x2; |
| } else { |
| fj = GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, 0); |
| fjp1 = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0); |
| fjp2 = fj + stride1x2; |
| } |
| |
| tempsum = 0; |
| fieldanalysis_orc_opposite_parity_5_tap_planar_yuv (&tempsum, fjp2, fjp1, fj, |
| fjp1, fjp2, noise_floor, width); |
| sum += tempsum; |
| |
| for (j = 1; j < (height >> 1) - 1; j++) { |
| /* shift everything down a line in the field of interest (means += stridex2) */ |
| fjm2 = fj; |
| fjm1 = fjp1; |
| fj = fjp2; |
| if ((*history)[0].parity == TOP_FIELD) { |
| fjp1 += stride1x2; |
| fjp2 += stride0x2; |
| } else { |
| fjp1 += stride0x2; |
| fjp2 += stride1x2; |
| } |
| |
| tempsum = 0; |
| fieldanalysis_orc_opposite_parity_5_tap_planar_yuv (&tempsum, fjm2, fjm1, |
| fj, fjp1, fjp2, noise_floor, width); |
| sum += tempsum; |
| } |
| |
| /* unroll the last line as it is a special case */ |
| /* shift everything down a line in the field of interest (means += stridex2) */ |
| fjm2 = fj; |
| fjm1 = fjp1; |
| fj = fjp2; |
| |
| tempsum = 0; |
| fieldanalysis_orc_opposite_parity_5_tap_planar_yuv (&tempsum, fjm2, fjm1, fj, |
| fjm1, fjm2, noise_floor, width); |
| sum += tempsum; |
| |
| return sum / ((6.0f / 2.0f) * width * height); /* 1 + 4 + 1 == 3 + 3 == 6; field is half height */ |
| } |
| |
| /* this metric was sourced from HandBrake but originally from transcode |
| * the return value is the highest block score for the row of blocks */ |
| static inline guint64 |
| block_score_for_row_32detect (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2], guint8 * base_fj, guint8 * base_fjp1) |
| { |
| guint64 i, j; |
| guint8 *comb_mask = filter->comb_mask; |
| guint *block_scores = filter->block_scores; |
| guint64 block_score; |
| guint8 *fjm2, *fjm1, *fj, *fjp1; |
| const gint incr = GST_VIDEO_FRAME_COMP_PSTRIDE (&(*history)[0].frame, 0); |
| const gint stridex2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const guint64 block_width = filter->block_width; |
| const guint64 block_height = filter->block_height; |
| const gint64 spatial_thresh = filter->spatial_thresh; |
| const gint width = |
| GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame) - |
| (GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame) % block_width); |
| |
| fjm2 = base_fj - stridex2; |
| fjm1 = base_fjp1 - stridex2; |
| fj = base_fj; |
| fjp1 = base_fjp1; |
| |
| for (j = 0; j < block_height; j++) { |
| /* we have to work one result ahead of ourselves which results in some small |
| * peculiarities below */ |
| gint diff1, diff2; |
| |
| diff1 = fj[0] - fjm1[0]; |
| diff2 = fj[0] - fjp1[0]; |
| /* change in the same direction */ |
| if ((diff1 > spatial_thresh && diff2 > spatial_thresh) |
| || (diff1 < -spatial_thresh && diff2 < -spatial_thresh)) { |
| comb_mask[0] = abs (fj[0] - fjm2[0]) < 10 && abs (fj[0] - fjm1[0]) > 15; |
| } else { |
| comb_mask[0] = FALSE; |
| } |
| |
| for (i = 1; i < width; i++) { |
| const guint64 idx = i * incr; |
| const guint64 res_idx = (i - 1) / block_width; |
| |
| diff1 = fj[idx] - fjm1[idx]; |
| diff2 = fj[idx] - fjp1[idx]; |
| if ((diff1 > spatial_thresh && diff2 > spatial_thresh) |
| || (diff1 < -spatial_thresh && diff2 < -spatial_thresh)) { |
| comb_mask[i] = abs (fj[idx] - fjm2[idx]) < 10 |
| && abs (fj[idx] - fjm1[idx]) > 15; |
| } else { |
| comb_mask[i] = FALSE; |
| } |
| |
| if (i == 1 && comb_mask[i - 1] && comb_mask[i]) { |
| /* left edge */ |
| block_scores[res_idx]++; |
| } else if (i == width - 1) { |
| /* right edge */ |
| if (comb_mask[i - 2] && comb_mask[i - 1] && comb_mask[i]) |
| block_scores[res_idx]++; |
| if (comb_mask[i - 1] && comb_mask[i]) |
| block_scores[i / block_width]++; |
| } else if (comb_mask[i - 2] && comb_mask[i - 1] && comb_mask[i]) { |
| block_scores[res_idx]++; |
| } |
| } |
| /* advance down a line */ |
| fjm2 = fjm1; |
| fjm1 = fj; |
| fj = fjp1; |
| fjp1 = fjm1 + stridex2; |
| } |
| |
| block_score = 0; |
| for (i = 0; i < width / block_width; i++) { |
| if (block_scores[i] > block_score) |
| block_score = block_scores[i]; |
| } |
| |
| g_free (block_scores); |
| g_free (comb_mask); |
| return block_score; |
| } |
| |
| /* this metric was sourced from HandBrake but originally from |
| * tritical's isCombedT Avisynth function |
| * the return value is the highest block score for the row of blocks */ |
| static inline guint64 |
| block_score_for_row_iscombed (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2], guint8 * base_fj, guint8 * base_fjp1) |
| { |
| guint64 i, j; |
| guint8 *comb_mask = filter->comb_mask; |
| guint *block_scores = filter->block_scores; |
| guint64 block_score; |
| guint8 *fjm1, *fj, *fjp1; |
| const gint incr = GST_VIDEO_FRAME_COMP_PSTRIDE (&(*history)[0].frame, 0); |
| const gint stridex2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const guint64 block_width = filter->block_width; |
| const guint64 block_height = filter->block_height; |
| const gint64 spatial_thresh = filter->spatial_thresh; |
| const gint64 spatial_thresh_squared = spatial_thresh * spatial_thresh; |
| const gint width = |
| GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame) - |
| (GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame) % block_width); |
| |
| fjm1 = base_fjp1 - stridex2; |
| fj = base_fj; |
| fjp1 = base_fjp1; |
| |
| for (j = 0; j < block_height; j++) { |
| /* we have to work one result ahead of ourselves which results in some small |
| * peculiarities below */ |
| gint diff1, diff2; |
| |
| diff1 = fj[0] - fjm1[0]; |
| diff2 = fj[0] - fjp1[0]; |
| /* change in the same direction */ |
| if ((diff1 > spatial_thresh && diff2 > spatial_thresh) |
| || (diff1 < -spatial_thresh && diff2 < -spatial_thresh)) { |
| comb_mask[0] = |
| (fjm1[0] - fj[0]) * (fjp1[0] - fj[0]) > spatial_thresh_squared; |
| } else { |
| comb_mask[0] = FALSE; |
| } |
| |
| for (i = 1; i < width; i++) { |
| const guint64 idx = i * incr; |
| const guint64 res_idx = (i - 1) / block_width; |
| |
| diff1 = fj[idx] - fjm1[idx]; |
| diff2 = fj[idx] - fjp1[idx]; |
| if ((diff1 > spatial_thresh && diff2 > spatial_thresh) |
| || (diff1 < -spatial_thresh && diff2 < -spatial_thresh)) { |
| comb_mask[i] = |
| (fjm1[idx] - fj[idx]) * (fjp1[idx] - fj[idx]) > |
| spatial_thresh_squared; |
| } else { |
| comb_mask[i] = FALSE; |
| } |
| |
| if (i == 1 && comb_mask[i - 1] && comb_mask[i]) { |
| /* left edge */ |
| block_scores[res_idx]++; |
| } else if (i == width - 1) { |
| /* right edge */ |
| if (comb_mask[i - 2] && comb_mask[i - 1] && comb_mask[i]) |
| block_scores[res_idx]++; |
| if (comb_mask[i - 1] && comb_mask[i]) |
| block_scores[i / block_width]++; |
| } else if (comb_mask[i - 2] && comb_mask[i - 1] && comb_mask[i]) { |
| block_scores[res_idx]++; |
| } |
| } |
| /* advance down a line */ |
| fjm1 = fj; |
| fj = fjp1; |
| fjp1 = fjm1 + stridex2; |
| } |
| |
| block_score = 0; |
| for (i = 0; i < width / block_width; i++) { |
| if (block_scores[i] > block_score) |
| block_score = block_scores[i]; |
| } |
| |
| g_free (block_scores); |
| g_free (comb_mask); |
| return block_score; |
| } |
| |
| /* this metric was sourced from HandBrake but originally from |
| * tritical's isCombedT Avisynth function |
| * the return value is the highest block score for the row of blocks */ |
| static inline guint64 |
| block_score_for_row_5_tap (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2], guint8 * base_fj, guint8 * base_fjp1) |
| { |
| guint64 i, j; |
| guint8 *comb_mask = filter->comb_mask; |
| guint *block_scores = filter->block_scores; |
| guint64 block_score; |
| guint8 *fjm2, *fjm1, *fj, *fjp1, *fjp2; |
| const gint incr = GST_VIDEO_FRAME_COMP_PSTRIDE (&(*history)[0].frame, 0); |
| const gint stridex2 = |
| GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0) << 1; |
| const guint64 block_width = filter->block_width; |
| const guint64 block_height = filter->block_height; |
| const gint64 spatial_thresh = filter->spatial_thresh; |
| const gint64 spatial_threshx6 = 6 * spatial_thresh; |
| const gint width = |
| GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame) - |
| (GST_VIDEO_FRAME_WIDTH (&(*history)[0].frame) % block_width); |
| |
| |
| fjm2 = base_fj - stridex2; |
| fjm1 = base_fjp1 - stridex2; |
| fj = base_fj; |
| fjp1 = base_fjp1; |
| fjp2 = fj + stridex2; |
| |
| for (j = 0; j < block_height; j++) { |
| /* we have to work one result ahead of ourselves which results in some small |
| * peculiarities below */ |
| gint diff1, diff2; |
| |
| diff1 = fj[0] - fjm1[0]; |
| diff2 = fj[0] - fjp1[0]; |
| /* change in the same direction */ |
| if ((diff1 > spatial_thresh && diff2 > spatial_thresh) |
| || (diff1 < -spatial_thresh && diff2 < -spatial_thresh)) { |
| comb_mask[0] = |
| abs (fjm2[0] + (fj[0] << 2) + fjp2[0] - 3 * (fjm1[0] + fjp1[0])) > |
| spatial_threshx6; |
| |
| /* motion detection that needs previous and next frames |
| this isn't really necessary, but acts as an optimisation if the |
| additional delay isn't a problem |
| if (motion_detection) { |
| if (abs(fpj[idx] - fj[idx] ) > motion_thresh && |
| abs( fjm1[idx] - fnjm1[idx]) > motion_thresh && |
| abs( fjp1[idx] - fnjp1[idx]) > motion_thresh) |
| motion++; |
| if (abs( fj[idx] - fnj[idx]) > motion_thresh && |
| abs(fpjm1[idx] - fjm1[idx] ) > motion_thresh && |
| abs(fpjp1[idx] - fjp1[idx] ) > motion_thresh) |
| motion++; |
| } else { |
| motion = 1; |
| } |
| */ |
| } else { |
| comb_mask[0] = FALSE; |
| } |
| |
| for (i = 1; i < width; i++) { |
| const guint64 idx = i * incr; |
| const guint64 res_idx = (i - 1) / block_width; |
| |
| diff1 = fj[idx] - fjm1[idx]; |
| diff2 = fj[idx] - fjp1[idx]; |
| if ((diff1 > spatial_thresh && diff2 > spatial_thresh) |
| || (diff1 < -spatial_thresh && diff2 < -spatial_thresh)) { |
| comb_mask[i] = |
| abs (fjm2[idx] + (fj[idx] << 2) + fjp2[idx] - 3 * (fjm1[idx] + |
| fjp1[idx])) > spatial_threshx6; |
| } else { |
| comb_mask[i] = FALSE; |
| } |
| |
| if (i == 1 && comb_mask[i - 1] && comb_mask[i]) { |
| /* left edge */ |
| block_scores[res_idx]++; |
| } else if (i == width - 1) { |
| /* right edge */ |
| if (comb_mask[i - 2] && comb_mask[i - 1] && comb_mask[i]) |
| block_scores[res_idx]++; |
| if (comb_mask[i - 1] && comb_mask[i]) |
| block_scores[i / block_width]++; |
| } else if (comb_mask[i - 2] && comb_mask[i - 1] && comb_mask[i]) { |
| block_scores[res_idx]++; |
| } |
| } |
| /* advance down a line */ |
| fjm2 = fjm1; |
| fjm1 = fj; |
| fj = fjp1; |
| fjp1 = fjp2; |
| fjp2 = fj + stridex2; |
| } |
| |
| block_score = 0; |
| for (i = 0; i < width / block_width; i++) { |
| if (block_scores[i] > block_score) |
| block_score = block_scores[i]; |
| } |
| |
| g_free (block_scores); |
| g_free (comb_mask); |
| return block_score; |
| } |
| |
| /* a pass is made over the field using one of three comb-detection metrics |
| and the results are then analysed block-wise. if the samples to the left |
| and right are combed, they contribute to the block score. if the block |
| score is above the given threshold, the frame is combed. if the block |
| score is between half the threshold and the threshold, the block is |
| slightly combed. if when analysis is complete, slight combing is detected |
| that is returned. if any results are observed that are above the threshold, |
| the function returns immediately */ |
| /* 0th field's parity defines operation */ |
| static gfloat |
| opposite_parity_windowed_comb (GstFieldAnalysis * filter, |
| FieldAnalysisFields (*history)[2]) |
| { |
| gint j; |
| gboolean slightly_combed; |
| |
| const gint height = GST_VIDEO_FRAME_HEIGHT (&(*history)[0].frame); |
| const gint stride = GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0); |
| const guint64 block_thresh = filter->block_thresh; |
| const guint64 block_height = filter->block_height; |
| guint8 *base_fj, *base_fjp1; |
| |
| if ((*history)[0].parity == TOP_FIELD) { |
| base_fj = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, 0); |
| base_fjp1 = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[1].frame, 0); |
| } else { |
| base_fj = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[1].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[1].frame, 0); |
| base_fjp1 = |
| GST_VIDEO_FRAME_COMP_DATA (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_OFFSET (&(*history)[0].frame, |
| 0) + GST_VIDEO_FRAME_COMP_STRIDE (&(*history)[0].frame, 0); |
| } |
| |
| /* we operate on a row of blocks of height block_height through each iteration */ |
| slightly_combed = FALSE; |
| for (j = 0; j <= height - filter->ignored_lines - block_height; |
| j += block_height) { |
| guint64 line_offset = (filter->ignored_lines + j) * stride; |
| guint block_score = |
| filter->block_score_for_row (filter, history, base_fj + line_offset, |
| base_fjp1 + line_offset); |
| |
| if (block_score > (block_thresh >> 1) |
| && block_score <= block_thresh) { |
| /* blend if nothing more combed comes along */ |
| slightly_combed = TRUE; |
| } else if (block_score > block_thresh) { |
| if (GST_VIDEO_INFO_INTERLACE_MODE (&(*history)[0].frame.info) == |
| GST_VIDEO_INTERLACE_MODE_INTERLEAVED) { |
| return 1.0f; /* blend */ |
| } else { |
| return 2.0f; /* deinterlace */ |
| } |
| } |
| } |
| |
| return (gfloat) slightly_combed; /* TRUE means blend, else don't */ |
| } |
| |
| /* this is where the magic happens |
| * |
| * the buffer incoming to the chain function (buf_to_queue) is added to the |
| * internal queue and then should no longer be used until it is popped from the |
| * queue. |
| * |
| * analysis is performed on the incoming buffer (peeked from the queue) and the |
| * previous buffer using two classes of metrics making up five individual |
| * scores. |
| * |
| * there are two same-parity comparisons: top of current with top of previous |
| * and bottom of current with bottom of previous |
| * |
| * there are three opposing parity comparisons: top of current with bottom of |
| * _current_, top of current with bottom of previous and bottom of current with |
| * top of previous. |
| * |
| * from the results of these comparisons we can use some rather complex logic to |
| * identify the state of the previous buffer, decorate and return it and |
| * identify some preliminary state of the current buffer. |
| * |
| * the returned buffer has a ref on it (it has come from _make_metadata_writable |
| * that was called on an incoming buffer that was queued and then popped) */ |
| static GstBuffer * |
| gst_field_analysis_process_buffer (GstFieldAnalysis * filter, |
| GstBuffer ** buf_to_queue) |
| { |
| /* res0/1 correspond to f0/1 */ |
| FieldAnalysis *res0, *res1; |
| FieldAnalysisFields history[2]; |
| GstBuffer *outbuf = NULL; |
| |
| /* move previous result to index 1 */ |
| filter->frames[1] = filter->frames[0]; |
| |
| if (!gst_video_frame_map (&filter->frames[0].frame, &filter->vinfo, |
| *buf_to_queue, GST_MAP_READ)) { |
| GST_ERROR_OBJECT (filter, "Failed to map buffer: %" GST_PTR_FORMAT, |
| *buf_to_queue); |
| return NULL; |
| } |
| filter->nframes++; |
| /* note that we have a ref and mapping the buffer takes a ref so to destroy a |
| * buffer we need to unmap it and unref it */ |
| |
| res0 = &filter->frames[0].results; /* results for current frame */ |
| res1 = &filter->frames[1].results; /* results for previous frame */ |
| |
| history[0].frame = filter->frames[0].frame; |
| /* we do it like this because the first frame has no predecessor so this is |
| * the only result we can get for it */ |
| if (filter->nframes >= 1) { |
| history[1].frame = filter->frames[0].frame; |
| history[0].parity = TOP_FIELD; |
| history[1].parity = BOTTOM_FIELD; |
| /* compare the fields within the buffer, if the buffer exhibits combing it |
| * could be interlaced or a mixed telecine frame */ |
| res0->f = filter->same_frame (filter, &history); |
| res0->t = res0->b = res0->t_b = res0->b_t = G_MAXINT64; |
| if (filter->nframes == 1) |
| GST_DEBUG_OBJECT (filter, "Scores: f %f, t , b , t_b , b_t ", res0->f); |
| if (res0->f <= filter->frame_thresh) { |
| res0->conclusion = FIELD_ANALYSIS_PROGRESSIVE; |
| } else { |
| res0->conclusion = FIELD_ANALYSIS_INTERLACED; |
| } |
| res0->holding = -1; /* needed fields unknown */ |
| res0->drop = FALSE; |
| } |
| if (filter->nframes >= 2) { |
| guint telecine_matches; |
| gboolean first_buffer = filter->first_buffer; |
| |
| filter->first_buffer = FALSE; |
| |
| history[1].frame = filter->frames[1].frame; |
| |
| /* compare the top and bottom fields to the previous frame */ |
| history[0].parity = TOP_FIELD; |
| history[1].parity = TOP_FIELD; |
| res0->t = filter->same_field (filter, &history); |
| history[0].parity = BOTTOM_FIELD; |
| history[1].parity = BOTTOM_FIELD; |
| res0->b = filter->same_field (filter, &history); |
| |
| /* compare the top field from this frame to the bottom of the previous for |
| * for combing (and vice versa) */ |
| history[0].parity = TOP_FIELD; |
| history[1].parity = BOTTOM_FIELD; |
| res0->t_b = filter->same_frame (filter, &history); |
| history[0].parity = BOTTOM_FIELD; |
| history[1].parity = TOP_FIELD; |
| res0->b_t = filter->same_frame (filter, &history); |
| |
| GST_DEBUG_OBJECT (filter, |
| "Scores: f %f, t %f, b %f, t_b %f, b_t %f", res0->f, |
| res0->t, res0->b, res0->t_b, res0->b_t); |
| |
| /* analysis */ |
| telecine_matches = 0; |
| if (res0->t_b <= filter->frame_thresh) |
| telecine_matches |= FIELD_ANALYSIS_TOP_BOTTOM; |
| if (res0->b_t <= filter->frame_thresh) |
| telecine_matches |= FIELD_ANALYSIS_BOTTOM_TOP; |
| /* normally if there is a top or bottom field match, it is significantly |
| * smaller than the other match - try 10% */ |
| if (res0->t <= filter->field_thresh || res0->t * (100 / 10) < res0->b) |
| telecine_matches |= FIELD_ANALYSIS_TOP_MATCH; |
| if (res0->b <= filter->field_thresh || res0->b * (100 / 10) < res0->t) |
| telecine_matches |= FIELD_ANALYSIS_BOTTOM_MATCH; |
| |
| if (telecine_matches & (FIELD_ANALYSIS_TOP_MATCH | |
| FIELD_ANALYSIS_BOTTOM_MATCH)) { |
| /* we have a repeated field => some kind of telecine */ |
| if (res1->f <= filter->frame_thresh) { |
| /* prev P */ |
| if ((telecine_matches & FIELD_ANALYSIS_TOP_MATCH) |
| && (telecine_matches & FIELD_ANALYSIS_BOTTOM_MATCH)) { |
| /* prev P, cur repeated => cur P */ |
| res0->conclusion = FIELD_ANALYSIS_TELECINE_PROGRESSIVE; |
| res0->holding = 1 + BOTH_FIELDS; |
| /* push prev P, RFF */ |
| res1->drop = TRUE; |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } else { |
| /* prev P, cur t xor b matches => cur TCM */ |
| res0->conclusion = FIELD_ANALYSIS_TELECINE_MIXED; |
| /* hold non-repeated: if bottom match, hold top = 1 + 0 */ |
| res0->holding = 1 + !(telecine_matches & FIELD_ANALYSIS_BOTTOM_MATCH); |
| /* push prev P */ |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } |
| } else { |
| /* prev !P */ |
| gboolean b, t; |
| |
| if (res0->f <= filter->frame_thresh) { |
| /* cur P */ |
| res0->conclusion = FIELD_ANALYSIS_TELECINE_PROGRESSIVE; |
| res0->holding = 1 + BOTH_FIELDS; |
| } else { |
| /* cur !P */ |
| res0->conclusion = FIELD_ANALYSIS_TELECINE_MIXED; |
| if (telecine_matches & FIELD_ANALYSIS_TOP_MATCH |
| && telecine_matches & FIELD_ANALYSIS_BOTTOM_MATCH) { |
| /* cur t && b */ |
| res0->holding = 0; |
| } else { |
| /* cur t xor b; hold non-repeated */ |
| res0->holding = |
| 1 + !(telecine_matches & FIELD_ANALYSIS_BOTTOM_MATCH); |
| } |
| } |
| |
| if (res1->holding == -1) { |
| b = t = TRUE; |
| } else { |
| b = res1->holding == 1 + BOTTOM_FIELD; |
| t = res1->holding == 1 + TOP_FIELD; |
| } |
| |
| if ((t && telecine_matches & FIELD_ANALYSIS_BOTTOM_MATCH) || (b |
| && telecine_matches & FIELD_ANALYSIS_TOP_MATCH)) { |
| if (t && telecine_matches & FIELD_ANALYSIS_BOTTOM_MATCH) { |
| res1->holding = 1 + TOP_FIELD; |
| } else if (b && telecine_matches & FIELD_ANALYSIS_TOP_MATCH) { |
| res1->holding = 1 + BOTTOM_FIELD; |
| } |
| /* push 1F held field */ |
| outbuf = |
| gst_field_analysis_decorate (filter, !(res1->holding - 1), TRUE, |
| res1->conclusion, res1->drop); |
| } else if (res0->f > filter->frame_thresh && ((t |
| && telecine_matches & FIELD_ANALYSIS_BOTTOM_TOP) || (b |
| && telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM))) { |
| if (t && telecine_matches & FIELD_ANALYSIS_BOTTOM_TOP) { |
| res1->holding = 1 + TOP_FIELD; |
| } else if (b && telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM) { |
| res1->holding = 1 + BOTTOM_FIELD; |
| } |
| res0->conclusion = FIELD_ANALYSIS_TELECINE_MIXED; |
| /* hold the opposite field to the one held in the last frame */ |
| res0->holding = 1 + (res1->holding == 1 + TOP_FIELD); |
| /* push 1F held field */ |
| outbuf = |
| gst_field_analysis_decorate (filter, !(res1->holding - 1), TRUE, |
| res1->conclusion, res1->drop); |
| } else if (first_buffer && (telecine_matches & FIELD_ANALYSIS_BOTTOM_TOP |
| || telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM)) { |
| /* non-matched field is an orphan in the first buffer - push orphan as 1F */ |
| res1->conclusion = FIELD_ANALYSIS_TELECINE_MIXED; |
| /* if prev b matched, prev t is orphan */ |
| res1->holding = 1 + !(telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM); |
| /* push 1F held field */ |
| outbuf = |
| gst_field_analysis_decorate (filter, !(res1->holding - 1), TRUE, |
| res1->conclusion, res1->drop); |
| } else if (res1->holding == 1 + BOTH_FIELDS || res1->holding == -1) { |
| /* holding both fields, push prev as is */ |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } else { |
| /* push prev as is with RFF */ |
| res1->drop = TRUE; |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } |
| } |
| } else if (res0->f <= filter->frame_thresh) { |
| /* cur P */ |
| res0->conclusion = FIELD_ANALYSIS_PROGRESSIVE; |
| res0->holding = 1 + BOTH_FIELDS; |
| if (res1->holding == 1 + BOTH_FIELDS || res1->holding == -1) { |
| /* holding both fields, push prev as is */ |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } else if (res1->holding > 0) { |
| /* holding one field, push prev 1F held */ |
| outbuf = |
| gst_field_analysis_decorate (filter, !(res1->holding - 1), TRUE, |
| res1->conclusion, res1->drop); |
| } else { |
| /* unknown or no fields held, push prev as is with RFF */ |
| /* this will push unknown as drop - should be pushed as not drop? */ |
| res1->drop = TRUE; |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } |
| } else { |
| /* cur !P */ |
| if (telecine_matches & (FIELD_ANALYSIS_TOP_BOTTOM | |
| FIELD_ANALYSIS_BOTTOM_TOP)) { |
| /* cross-parity match => TCM */ |
| gboolean b, t; |
| |
| if (res1->holding == -1) { |
| b = t = TRUE; |
| } else { |
| b = res1->holding == 1 + BOTTOM_FIELD; |
| t = res1->holding == 1 + TOP_FIELD; |
| } |
| |
| res0->conclusion = FIELD_ANALYSIS_TELECINE_MIXED; |
| /* leave holding as unknown */ |
| if (res1->holding == 1 + BOTH_FIELDS) { |
| /* prev P/TCP/I [or TCM repeated (weird case)] */ |
| /* push prev as is */ |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } else if ((t && telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM) || (b |
| && telecine_matches & FIELD_ANALYSIS_BOTTOM_TOP)) { |
| /* held is opposite to matched => need both field from prev */ |
| /* if t_b, hold bottom from prev and top from current, else vice-versa */ |
| res1->holding = 1 + ! !(telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM); |
| res0->holding = 1 + !(telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM); |
| /* push prev TCM */ |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } else if ((res1->holding > 0 && res1->holding != 1 + BOTH_FIELDS) || (t |
| && telecine_matches & FIELD_ANALYSIS_BOTTOM_TOP) || (b |
| && telecine_matches & FIELD_ANALYSIS_TOP_BOTTOM)) { |
| /* held field is needed, push prev 1F held */ |
| outbuf = |
| gst_field_analysis_decorate (filter, !(res1->holding - 1), TRUE, |
| res1->conclusion, res1->drop); |
| } else { |
| /* holding none or unknown */ |
| /* push prev as is with RFF */ |
| res1->drop = TRUE; |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } |
| } else { |
| /* cur I */ |
| res0->conclusion = FIELD_ANALYSIS_INTERLACED; |
| res0->holding = 1 + BOTH_FIELDS; |
| /* push prev appropriately */ |
| res1->drop = res1->holding <= 0; |
| if (res1->holding != 0) { |
| res1->drop = FALSE; |
| if (res1->holding == 1 + BOTH_FIELDS || res1->holding == -1) { |
| /* push prev as is */ |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, |
| res1->conclusion, res1->drop); |
| } else { |
| /* push prev 1F held */ |
| outbuf = |
| gst_field_analysis_decorate (filter, !(res1->holding - 1), TRUE, |
| res1->conclusion, res1->drop); |
| } |
| } else { |
| /* push prev as is with RFF */ |
| res1->drop = TRUE; |
| outbuf = |
| gst_field_analysis_decorate (filter, -1, FALSE, res1->conclusion, |
| res1->drop); |
| } |
| } |
| } |
| } |
| |
| switch (res0->conclusion) { |
| case FIELD_ANALYSIS_PROGRESSIVE: |
| GST_DEBUG_OBJECT (filter, "Conclusion: PROGRESSIVE"); |
| break; |
| case FIELD_ANALYSIS_INTERLACED: |
| GST_DEBUG_OBJECT (filter, "Conclusion: INTERLACED"); |
| break; |
| case FIELD_ANALYSIS_TELECINE_PROGRESSIVE: |
| GST_DEBUG_OBJECT (filter, "Conclusion: TC PROGRESSIVE"); |
| break; |
| case FIELD_ANALYSIS_TELECINE_MIXED: |
| GST_DEBUG_OBJECT (filter, "Conclusion: TC MIXED %s", |
| res0->holding == |
| 1 + BOTH_FIELDS ? "top and bottom" : res0->holding == |
| 1 + BOTTOM_FIELD ? "bottom" : "top"); |
| break; |
| default: |
| GST_DEBUG_OBJECT (filter, "Invalid conclusion! This is a bug!"); |
| break; |
| } |
| |
| return outbuf; |
| } |
| |
| /* we have a ref on buf when it comes into chain */ |
| static GstFlowReturn |
| gst_field_analysis_chain (GstPad * pad, GstObject * parent, GstBuffer * buf) |
| { |
| GstFlowReturn ret = GST_FLOW_OK; |
| GstFieldAnalysis *filter; |
| GstBuffer *outbuf = NULL; |
| |
| filter = GST_FIELDANALYSIS (parent); |
| |
| GST_OBJECT_LOCK (filter); |
| if (filter->flushing) { |
| GST_DEBUG_OBJECT (filter, "We are flushing."); |
| /* we have a ref on buf so it must be unreffed */ |
| goto unref_unlock_ret; |
| } |
| |
| if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT)) { |
| GST_DEBUG_OBJECT (filter, "Discont: flushing"); |
| /* we should have a ref on outbuf, either because we had one when it entered |
| * the queue and _make_metadata_writable () inside _decorate () returned |
| * the same buffer or because it returned a new buffer on which we have one |
| * ref */ |
| outbuf = gst_field_analysis_flush_one (filter, NULL); |
| |
| if (outbuf) { |
| /* we give away our ref on outbuf here */ |
| GST_OBJECT_UNLOCK (filter); |
| ret = gst_pad_push (filter->srcpad, outbuf); |
| GST_OBJECT_LOCK (filter); |
| if (filter->flushing) { |
| GST_DEBUG_OBJECT (filter, "We are flushing. outbuf already pushed."); |
| /* we have a ref on buf so it must be unreffed */ |
| goto unref_unlock_ret; |
| } |
| } |
| |
| gst_field_analysis_clear_frames (filter); |
| |
| if (ret != GST_FLOW_OK) { |
| GST_DEBUG_OBJECT (filter, |
| "Pushing of flushed buffer failed with return %d", ret); |
| /* we have a ref on buf so it must be unreffed */ |
| goto unref_unlock_ret; |
| } else { |
| outbuf = NULL; |
| } |
| } |
| |
| /* after this function, buf has been pushed to the internal queue and its ref |
| * retained there and we have a ref on outbuf */ |
| outbuf = gst_field_analysis_process_buffer (filter, &buf); |
| |
| GST_OBJECT_UNLOCK (filter); |
| |
| /* here we give up our ref on outbuf */ |
| if (outbuf) |
| ret = gst_pad_push (filter->srcpad, outbuf); |
| |
| return ret; |
| |
| unref_unlock_ret: |
| /* we must unref the input buffer here */ |
| gst_buffer_unref (buf); |
| GST_OBJECT_UNLOCK (filter); |
| return ret; |
| } |
| |
| static GstStateChangeReturn |
| gst_field_analysis_change_state (GstElement * element, |
| GstStateChange transition) |
| { |
| GstStateChangeReturn ret; |
| GstFieldAnalysis *filter = GST_FIELDANALYSIS (element); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_NULL_TO_READY: |
| break; |
| case GST_STATE_CHANGE_READY_TO_PAUSED: |
| break; |
| case GST_STATE_CHANGE_PAUSED_TO_PLAYING: |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| if (ret != GST_STATE_CHANGE_SUCCESS) |
| return ret; |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_PLAYING_TO_PAUSED: |
| break; |
| case GST_STATE_CHANGE_PAUSED_TO_READY: |
| gst_field_analysis_reset (filter); |
| break; |
| case GST_STATE_CHANGE_READY_TO_NULL: |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void |
| gst_field_analysis_finalize (GObject * object) |
| { |
| GstFieldAnalysis *filter = GST_FIELDANALYSIS (object); |
| |
| gst_field_analysis_reset (filter); |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| |
| static gboolean |
| fieldanalysis_init (GstPlugin * fieldanalysis) |
| { |
| GST_DEBUG_CATEGORY_INIT (gst_field_analysis_debug, "fieldanalysis", |
| 0, "Video field analysis"); |
| |
| return gst_element_register (fieldanalysis, "fieldanalysis", GST_RANK_NONE, |
| GST_TYPE_FIELDANALYSIS); |
| } |
| |
| GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, |
| GST_VERSION_MINOR, |
| fieldanalysis, |
| "Video field analysis", |
| fieldanalysis_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/") |