+++ /dev/null
-/* GStreamer
- * Copyright (C) <2011> Stefan Kost <ensonic@users.sf.net>
- * Copyright (C) <2015> Luis de Bethencourt <luis@debethencourt.com>
- *
- * gstaudiovisualizer.h: base class for audio visualisation elements
- *
- * 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:gstaudiovisualizer
- *
- * A baseclass for scopes (visualizers). It takes care of re-fitting the
- * audio-rate to video-rate and handles renegotiation (downstream video size
- * changes).
- *
- * It also provides several background shading effects. These effects are
- * applied to a previous picture before the render() implementation can draw a
- * new frame.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <string.h>
-
-#include <gst/video/video.h>
-#include <gst/video/gstvideometa.h>
-#include <gst/video/gstvideopool.h>
-
-#include "gstaudiovisualizer.h"
-
-GST_DEBUG_CATEGORY_STATIC (audio_visualizer_debug);
-#define GST_CAT_DEFAULT (audio_visualizer_debug)
-
-#define DEFAULT_SHADER GST_AUDIO_VISUALIZER_SHADER_FADE
-#define DEFAULT_SHADE_AMOUNT 0x000a0a0a
-
-enum
-{
- PROP_0,
- PROP_SHADER,
- PROP_SHADE_AMOUNT
-};
-
-static GstBaseTransformClass *parent_class = NULL;
-
-static void gst_audio_visualizer_class_init (GstAudioVisualizerClass * klass);
-static void gst_audio_visualizer_init (GstAudioVisualizer * scope,
- GstAudioVisualizerClass * g_class);
-static void gst_audio_visualizer_set_property (GObject * object,
- guint prop_id, const GValue * value, GParamSpec * pspec);
-static void gst_audio_visualizer_get_property (GObject * object,
- guint prop_id, GValue * value, GParamSpec * pspec);
-static void gst_audio_visualizer_finalize (GObject * object);
-
-static gboolean gst_audio_visualizer_src_negotiate (GstAudioVisualizer * scope);
-static gboolean gst_audio_visualizer_src_setcaps (GstAudioVisualizer *
- scope, GstCaps * caps);
-static gboolean gst_audio_visualizer_sink_setcaps (GstAudioVisualizer *
- scope, GstCaps * caps);
-
-static GstFlowReturn gst_audio_visualizer_chain (GstPad * pad,
- GstObject * parent, GstBuffer * buffer);
-
-static gboolean gst_audio_visualizer_src_event (GstPad * pad,
- GstObject * parent, GstEvent * event);
-static gboolean gst_audio_visualizer_sink_event (GstPad * pad,
- GstObject * parent, GstEvent * event);
-
-static gboolean gst_audio_visualizer_src_query (GstPad * pad,
- GstObject * parent, GstQuery * query);
-
-static GstStateChangeReturn gst_audio_visualizer_change_state (GstElement *
- element, GstStateChange transition);
-
-static gboolean gst_audio_visualizer_do_bufferpool (GstAudioVisualizer * scope,
- GstCaps * outcaps);
-
-static gboolean
-default_decide_allocation (GstAudioVisualizer * scope, GstQuery * query);
-
-#define GST_AUDIO_VISUALIZER_GET_PRIVATE(obj) \
- (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_AUDIO_VISUALIZER, GstAudioVisualizerPrivate))
-
-struct _GstAudioVisualizerPrivate
-{
- gboolean negotiated;
-
- GstBufferPool *pool;
- gboolean pool_active;
- GstAllocator *allocator;
- GstAllocationParams params;
- GstQuery *query;
-
- /* pads */
- GstPad *srcpad, *sinkpad;
-
- GstAudioVisualizerShader shader_type;
- GstAudioVisualizerShaderFunc shader;
- guint32 shade_amount;
-
- GstAdapter *adapter;
-
- GstBuffer *inbuf;
- GstBuffer *tempbuf;
- GstVideoFrame tempframe;
-
- guint spf; /* samples per video frame */
- guint64 frame_duration;
-
- /* QoS stuff *//* with LOCK */
- gdouble proportion;
- GstClockTime earliest_time;
-
- guint dropped; /* frames dropped / not dropped */
- guint processed;
-
- /* configuration mutex */
- GMutex config_lock;
-
- GstSegment segment;
-};
-
-
-/* shading functions */
-
-#define GST_TYPE_AUDIO_VISUALIZER_SHADER (gst_audio_visualizer_shader_get_type())
-static GType
-gst_audio_visualizer_shader_get_type (void)
-{
- static GType shader_type = 0;
- static const GEnumValue shaders[] = {
- {GST_AUDIO_VISUALIZER_SHADER_NONE, "None", "none"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE, "Fade", "fade"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP, "Fade and move up",
- "fade-and-move-up"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN, "Fade and move down",
- "fade-and-move-down"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT, "Fade and move left",
- "fade-and-move-left"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT,
- "Fade and move right",
- "fade-and-move-right"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT,
- "Fade and move horizontally out", "fade-and-move-horiz-out"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN,
- "Fade and move horizontally in", "fade-and-move-horiz-in"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT,
- "Fade and move vertically out", "fade-and-move-vert-out"},
- {GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN,
- "Fade and move vertically in", "fade-and-move-vert-in"},
- {0, NULL, NULL},
- };
-
- if (G_UNLIKELY (shader_type == 0)) {
- /* TODO: rename when exporting it as a library */
- shader_type =
- g_enum_register_static
- ("GstAudioVisualizerShader-BadGstAudioVisualizers", shaders);
- }
- return shader_type;
-}
-
-/* we're only supporting GST_VIDEO_FORMAT_xRGB right now) */
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
-
-#define SHADE(_d, _s, _i, _r, _g, _b) \
-G_STMT_START { \
- _d[_i * 4 + 0] = (_s[_i * 4 + 0] > _b) ? _s[_i * 4 + 0] - _b : 0; \
- _d[_i * 4 + 1] = (_s[_i * 4 + 1] > _g) ? _s[_i * 4 + 1] - _g : 0; \
- _d[_i * 4 + 2] = (_s[_i * 4 + 2] > _r) ? _s[_i * 4 + 2] - _r : 0; \
- _d[_i * 4 + 3] = 0; \
-} G_STMT_END
-
-#else /* G_BYTE_ORDER == G_LITTLE_ENDIAN */
-
-#define SHADE(_d, _s, _i, _r, _g, _b) \
-G_STMT_START { \
- _d[_i * 4 + 0] = 0; \
- _d[_i * 4 + 1] = (_s[_i * 4 + 1] > _r) ? _s[_i * 4 + 1] - _r : 0; \
- _d[_i * 4 + 2] = (_s[_i * 4 + 2] > _g) ? _s[_i * 4 + 2] - _g : 0; \
- _d[_i * 4 + 3] = (_s[_i * 4 + 3] > _b) ? _s[_i * 4 + 3] - _b : 0; \
-} G_STMT_END
-
-#endif
-
-static void
-shader_fade (GstAudioVisualizer * scope, const GstVideoFrame * sframe,
- GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- for (j = 0; j < height; j++) {
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- s += ss;
- d += ds;
- }
-}
-
-static void
-shader_fade_and_move_up (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- for (j = 1; j < height; j++) {
- s += ss;
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- d += ds;
- }
-}
-
-static void
-shader_fade_and_move_down (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- for (j = 1; j < height; j++) {
- d += ds;
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- s += ss;
- }
-}
-
-static void
-shader_fade_and_move_left (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- width -= 1;
- s += 4;
-
- /* move to the left */
- for (j = 0; j < height; j++) {
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- d += ds;
- s += ss;
- }
-}
-
-static void
-shader_fade_and_move_right (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- width -= 1;
- d += 4;
-
- /* move to the right */
- for (j = 0; j < height; j++) {
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- d += ds;
- s += ss;
- }
-}
-
-static void
-shader_fade_and_move_horiz_out (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- /* move upper half up */
- for (j = 0; j < height / 2; j++) {
- s += ss;
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- d += ds;
- }
- /* move lower half down */
- for (j = 0; j < height / 2; j++) {
- d += ds;
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- s += ss;
- }
-}
-
-static void
-shader_fade_and_move_horiz_in (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *d;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- /* move upper half down */
- for (j = 0; j < height / 2; j++) {
- d += ds;
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- s += ss;
- }
- /* move lower half up */
- for (j = 0; j < height / 2; j++) {
- s += ss;
- for (i = 0; i < width; i++) {
- SHADE (d, s, i, r, g, b);
- }
- d += ds;
- }
-}
-
-static void
-shader_fade_and_move_vert_out (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *s1, *d, *d1;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- for (j = 0; j < height; j++) {
- /* move left half to the left */
- s1 = s + 1;
- for (i = 0; i < width / 2; i++) {
- SHADE (d, s1, i, r, g, b);
- }
- /* move right half to the right */
- d1 = d + 1;
- for (; i < width - 1; i++) {
- SHADE (d1, s, i, r, g, b);
- }
- s += ss;
- d += ds;
- }
-}
-
-static void
-shader_fade_and_move_vert_in (GstAudioVisualizer * scope,
- const GstVideoFrame * sframe, GstVideoFrame * dframe)
-{
- guint i, j;
- guint32 shade_amount = scope->priv->shade_amount;
- guint r = (shade_amount >> 16) & 0xff;
- guint g = (shade_amount >> 8) & 0xff;
- guint b = (shade_amount >> 0) & 0xff;
- guint8 *s, *s1, *d, *d1;
- gint ss, ds, width, height;
-
- s = GST_VIDEO_FRAME_PLANE_DATA (sframe, 0);
- ss = GST_VIDEO_FRAME_PLANE_STRIDE (sframe, 0);
- d = GST_VIDEO_FRAME_PLANE_DATA (dframe, 0);
- ds = GST_VIDEO_FRAME_PLANE_STRIDE (dframe, 0);
-
- width = GST_VIDEO_FRAME_WIDTH (sframe);
- height = GST_VIDEO_FRAME_HEIGHT (sframe);
-
- for (j = 0; j < height; j++) {
- /* move left half to the right */
- d1 = d + 1;
- for (i = 0; i < width / 2; i++) {
- SHADE (d1, s, i, r, g, b);
- }
- /* move right half to the left */
- s1 = s + 1;
- for (; i < width - 1; i++) {
- SHADE (d, s1, i, r, g, b);
- }
- s += ss;
- d += ds;
- }
-}
-
-static void
-gst_audio_visualizer_change_shader (GstAudioVisualizer * scope)
-{
- GstAudioVisualizerShaderFunc shader;
-
- switch (scope->priv->shader_type) {
- case GST_AUDIO_VISUALIZER_SHADER_NONE:
- shader = NULL;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE:
- shader = shader_fade;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP:
- shader = shader_fade_and_move_up;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN:
- shader = shader_fade_and_move_down;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT:
- shader = shader_fade_and_move_left;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT:
- shader = shader_fade_and_move_right;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT:
- shader = shader_fade_and_move_horiz_out;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN:
- shader = shader_fade_and_move_horiz_in;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT:
- shader = shader_fade_and_move_vert_out;
- break;
- case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN:
- shader = shader_fade_and_move_vert_in;
- break;
- default:
- GST_ERROR ("invalid shader function");
- shader = NULL;
- break;
- }
-
- scope->priv->shader = shader;
-}
-
-/* base class */
-
-GType
-gst_audio_visualizer_get_type (void)
-{
- static volatile gsize audio_visualizer_type = 0;
-
- if (g_once_init_enter (&audio_visualizer_type)) {
- static const GTypeInfo audio_visualizer_info = {
- sizeof (GstAudioVisualizerClass),
- NULL,
- NULL,
- (GClassInitFunc) gst_audio_visualizer_class_init,
- NULL,
- NULL,
- sizeof (GstAudioVisualizer),
- 0,
- (GInstanceInitFunc) gst_audio_visualizer_init,
- };
- GType _type;
-
- /* TODO: rename when exporting it as a library */
- _type = g_type_register_static (GST_TYPE_ELEMENT,
- "GstAudioVisualizer-BadGstAudioVisualizers", &audio_visualizer_info,
- G_TYPE_FLAG_ABSTRACT);
- g_once_init_leave (&audio_visualizer_type, _type);
- }
- return (GType) audio_visualizer_type;
-}
-
-static void
-gst_audio_visualizer_class_init (GstAudioVisualizerClass * klass)
-{
- GObjectClass *gobject_class = (GObjectClass *) klass;
- GstElementClass *element_class = (GstElementClass *) klass;
-
- g_type_class_add_private (klass, sizeof (GstAudioVisualizerPrivate));
-
- parent_class = g_type_class_peek_parent (klass);
-
- GST_DEBUG_CATEGORY_INIT (audio_visualizer_debug, "baseaudiovisualizer",
- 0, "scope audio visualisation base class");
-
- gobject_class->set_property = gst_audio_visualizer_set_property;
- gobject_class->get_property = gst_audio_visualizer_get_property;
- gobject_class->finalize = gst_audio_visualizer_finalize;
-
- element_class->change_state =
- GST_DEBUG_FUNCPTR (gst_audio_visualizer_change_state);
-
- klass->decide_allocation = GST_DEBUG_FUNCPTR (default_decide_allocation);
-
- g_object_class_install_property (gobject_class, PROP_SHADER,
- g_param_spec_enum ("shader", "shader type",
- "Shader function to apply on each frame",
- GST_TYPE_AUDIO_VISUALIZER_SHADER, DEFAULT_SHADER,
- G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
- g_object_class_install_property (gobject_class, PROP_SHADE_AMOUNT,
- g_param_spec_uint ("shade-amount", "shade amount",
- "Shading color to use (big-endian ARGB)", 0, G_MAXUINT32,
- DEFAULT_SHADE_AMOUNT,
- G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
-}
-
-static void
-gst_audio_visualizer_init (GstAudioVisualizer * scope,
- GstAudioVisualizerClass * g_class)
-{
- GstPadTemplate *pad_template;
-
- scope->priv = GST_AUDIO_VISUALIZER_GET_PRIVATE (scope);
-
- /* create the sink and src pads */
- pad_template =
- gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
- g_return_if_fail (pad_template != NULL);
- scope->priv->sinkpad = gst_pad_new_from_template (pad_template, "sink");
- gst_pad_set_chain_function (scope->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_audio_visualizer_chain));
- gst_pad_set_event_function (scope->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_audio_visualizer_sink_event));
- gst_element_add_pad (GST_ELEMENT (scope), scope->priv->sinkpad);
-
- pad_template =
- gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
- g_return_if_fail (pad_template != NULL);
- scope->priv->srcpad = gst_pad_new_from_template (pad_template, "src");
- gst_pad_set_event_function (scope->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_audio_visualizer_src_event));
- gst_pad_set_query_function (scope->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_audio_visualizer_src_query));
- gst_element_add_pad (GST_ELEMENT (scope), scope->priv->srcpad);
-
- scope->priv->adapter = gst_adapter_new ();
- scope->priv->inbuf = gst_buffer_new ();
-
- /* properties */
- scope->priv->shader_type = DEFAULT_SHADER;
- gst_audio_visualizer_change_shader (scope);
- scope->priv->shade_amount = DEFAULT_SHADE_AMOUNT;
-
- /* reset the initial video state */
- gst_video_info_init (&scope->vinfo);
- scope->priv->frame_duration = GST_CLOCK_TIME_NONE;
-
- /* reset the initial state */
- gst_audio_info_init (&scope->ainfo);
- gst_video_info_init (&scope->vinfo);
-
- g_mutex_init (&scope->priv->config_lock);
-}
-
-static void
-gst_audio_visualizer_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec)
-{
- GstAudioVisualizer *scope = GST_AUDIO_VISUALIZER (object);
-
- switch (prop_id) {
- case PROP_SHADER:
- scope->priv->shader_type = g_value_get_enum (value);
- gst_audio_visualizer_change_shader (scope);
- break;
- case PROP_SHADE_AMOUNT:
- scope->priv->shade_amount = g_value_get_uint (value);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_audio_visualizer_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec)
-{
- GstAudioVisualizer *scope = GST_AUDIO_VISUALIZER (object);
-
- switch (prop_id) {
- case PROP_SHADER:
- g_value_set_enum (value, scope->priv->shader_type);
- break;
- case PROP_SHADE_AMOUNT:
- g_value_set_uint (value, scope->priv->shade_amount);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_audio_visualizer_finalize (GObject * object)
-{
- GstAudioVisualizer *scope = GST_AUDIO_VISUALIZER (object);
- GstAudioVisualizerPrivate *priv = scope->priv;
-
- if (priv->adapter) {
- g_object_unref (priv->adapter);
- priv->adapter = NULL;
- }
- if (priv->inbuf) {
- gst_buffer_unref (priv->inbuf);
- priv->inbuf = NULL;
- }
- if (priv->tempbuf) {
- gst_video_frame_unmap (&priv->tempframe);
- gst_buffer_unref (priv->tempbuf);
- priv->tempbuf = NULL;
- }
-
- g_mutex_clear (&priv->config_lock);
-
- G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-static void
-gst_audio_visualizer_reset (GstAudioVisualizer * scope)
-{
- GstAudioVisualizerPrivate *priv = scope->priv;
-
- gst_adapter_clear (priv->adapter);
- gst_segment_init (&priv->segment, GST_FORMAT_UNDEFINED);
-
- GST_OBJECT_LOCK (scope);
- priv->proportion = 1.0;
- priv->earliest_time = -1;
- priv->dropped = 0;
- priv->processed = 0;
- GST_OBJECT_UNLOCK (scope);
-}
-
-static gboolean
-gst_audio_visualizer_sink_setcaps (GstAudioVisualizer * scope, GstCaps * caps)
-{
- GstAudioInfo info;
-
- if (!gst_audio_info_from_caps (&info, caps))
- goto wrong_caps;
-
- scope->ainfo = info;
-
- GST_DEBUG_OBJECT (scope, "audio: channels %d, rate %d",
- GST_AUDIO_INFO_CHANNELS (&info), GST_AUDIO_INFO_RATE (&info));
-
- if (!gst_audio_visualizer_src_negotiate (scope)) {
- goto not_negotiated;
- }
-
- return TRUE;
-
- /* Errors */
-wrong_caps:
- {
- GST_WARNING_OBJECT (scope, "could not parse caps");
- return FALSE;
- }
-not_negotiated:
- {
- GST_WARNING_OBJECT (scope, "failed to negotiate");
- return FALSE;
- }
-}
-
-static gboolean
-gst_audio_visualizer_src_setcaps (GstAudioVisualizer * scope, GstCaps * caps)
-{
- GstVideoInfo info;
- GstAudioVisualizerClass *klass;
- GstAudioVisualizerPrivate *priv;
- gboolean res;
-
- if (!gst_video_info_from_caps (&info, caps))
- goto wrong_caps;
-
- klass = GST_AUDIO_VISUALIZER_CLASS (G_OBJECT_GET_CLASS (scope));
-
- priv = scope->priv;
-
- scope->vinfo = info;
-
- priv->frame_duration = gst_util_uint64_scale_int (GST_SECOND,
- GST_VIDEO_INFO_FPS_D (&info), GST_VIDEO_INFO_FPS_N (&info));
- priv->spf = gst_util_uint64_scale_int (GST_AUDIO_INFO_RATE (&scope->ainfo),
- GST_VIDEO_INFO_FPS_D (&info), GST_VIDEO_INFO_FPS_N (&info));
- scope->req_spf = priv->spf;
-
- if (priv->tempbuf) {
- gst_video_frame_unmap (&priv->tempframe);
- gst_buffer_unref (priv->tempbuf);
- }
- priv->tempbuf = gst_buffer_new_wrapped (g_malloc0 (scope->vinfo.size),
- scope->vinfo.size);
- gst_video_frame_map (&priv->tempframe, &scope->vinfo, priv->tempbuf,
- GST_MAP_READWRITE);
-
- if (klass->setup && !klass->setup (scope))
- goto setup_failed;
-
- GST_DEBUG_OBJECT (scope, "video: dimension %dx%d, framerate %d/%d",
- GST_VIDEO_INFO_WIDTH (&info), GST_VIDEO_INFO_HEIGHT (&info),
- GST_VIDEO_INFO_FPS_N (&info), GST_VIDEO_INFO_FPS_D (&info));
- GST_DEBUG_OBJECT (scope, "blocks: spf %u, req_spf %u", priv->spf,
- scope->req_spf);
-
- gst_pad_set_caps (priv->srcpad, caps);
-
- /* find a pool for the negotiated caps now */
- res = gst_audio_visualizer_do_bufferpool (scope, caps);
- gst_caps_unref (caps);
-
- return res;
-
- /* ERRORS */
-wrong_caps:
- {
- gst_caps_unref (caps);
- GST_DEBUG_OBJECT (scope, "error parsing caps");
- return FALSE;
- }
-
-setup_failed:
- {
- GST_WARNING_OBJECT (scope, "failed to set up");
- return FALSE;
- }
-}
-
-static gboolean
-gst_audio_visualizer_src_negotiate (GstAudioVisualizer * scope)
-{
- GstCaps *othercaps, *target;
- GstStructure *structure;
- GstCaps *templ;
- gboolean ret;
-
- templ = gst_pad_get_pad_template_caps (scope->priv->srcpad);
-
- GST_DEBUG_OBJECT (scope, "performing negotiation");
-
- /* see what the peer can do */
- othercaps = gst_pad_peer_query_caps (scope->priv->srcpad, NULL);
- if (othercaps) {
- target = gst_caps_intersect (othercaps, templ);
- gst_caps_unref (othercaps);
- gst_caps_unref (templ);
-
- if (gst_caps_is_empty (target))
- goto no_format;
-
- target = gst_caps_truncate (target);
- } else {
- target = templ;
- }
-
- target = gst_caps_make_writable (target);
- structure = gst_caps_get_structure (target, 0);
- gst_structure_fixate_field_nearest_int (structure, "width", 320);
- gst_structure_fixate_field_nearest_int (structure, "height", 200);
- gst_structure_fixate_field_nearest_fraction (structure, "framerate", 25, 1);
-
- target = gst_caps_fixate (target);
-
- GST_DEBUG_OBJECT (scope, "final caps are %" GST_PTR_FORMAT, target);
-
- ret = gst_audio_visualizer_src_setcaps (scope, target);
-
- return ret;
-
-no_format:
- {
- gst_caps_unref (target);
- return FALSE;
- }
-}
-
-/* takes ownership of the pool, allocator and query */
-static gboolean
-gst_audio_visualizer_set_allocation (GstAudioVisualizer * scope,
- GstBufferPool * pool, GstAllocator * allocator,
- GstAllocationParams * params, GstQuery * query)
-{
- GstAllocator *oldalloc;
- GstBufferPool *oldpool;
- GstQuery *oldquery;
- GstAudioVisualizerPrivate *priv = scope->priv;
-
- GST_OBJECT_LOCK (scope);
- oldpool = priv->pool;
- priv->pool = pool;
- priv->pool_active = FALSE;
-
- oldalloc = priv->allocator;
- priv->allocator = allocator;
-
- oldquery = priv->query;
- priv->query = query;
-
- if (params)
- priv->params = *params;
- else
- gst_allocation_params_init (&priv->params);
- GST_OBJECT_UNLOCK (scope);
-
- if (oldpool) {
- GST_DEBUG_OBJECT (scope, "deactivating old pool %p", oldpool);
- gst_buffer_pool_set_active (oldpool, FALSE);
- gst_object_unref (oldpool);
- }
- if (oldalloc) {
- gst_object_unref (oldalloc);
- }
- if (oldquery) {
- gst_query_unref (oldquery);
- }
- return TRUE;
-}
-
-static gboolean
-gst_audio_visualizer_do_bufferpool (GstAudioVisualizer * scope,
- GstCaps * outcaps)
-{
- GstQuery *query;
- gboolean result = TRUE;
- GstBufferPool *pool = NULL;
- GstAudioVisualizerClass *klass;
- GstAllocator *allocator;
- GstAllocationParams params;
-
- /* not passthrough, we need to allocate */
- /* find a pool for the negotiated caps now */
- GST_DEBUG_OBJECT (scope, "doing allocation query");
- query = gst_query_new_allocation (outcaps, TRUE);
-
- if (!gst_pad_peer_query (scope->priv->srcpad, query)) {
- /* not a problem, we use the query defaults */
- GST_DEBUG_OBJECT (scope, "allocation query failed");
- }
-
- klass = GST_AUDIO_VISUALIZER_GET_CLASS (scope);
-
- GST_DEBUG_OBJECT (scope, "calling decide_allocation");
- g_assert (klass->decide_allocation != NULL);
- result = klass->decide_allocation (scope, query);
-
- GST_DEBUG_OBJECT (scope, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
- query);
-
- if (!result)
- goto no_decide_allocation;
-
- /* we got configuration from our peer or the decide_allocation method,
- * parse them */
- if (gst_query_get_n_allocation_params (query) > 0) {
- gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
- } else {
- allocator = NULL;
- gst_allocation_params_init (¶ms);
- }
-
- if (gst_query_get_n_allocation_pools (query) > 0)
- gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
-
- /* now store */
- result =
- gst_audio_visualizer_set_allocation (scope, pool, allocator, ¶ms,
- query);
-
- return result;
-
- /* Errors */
-no_decide_allocation:
- {
- GST_WARNING_OBJECT (scope, "Subclass failed to decide allocation");
- gst_query_unref (query);
-
- return result;
- }
-}
-
-static gboolean
-default_decide_allocation (GstAudioVisualizer * scope, GstQuery * query)
-{
- GstCaps *outcaps;
- GstBufferPool *pool;
- guint size, min, max;
- GstAllocator *allocator;
- GstAllocationParams params;
- GstStructure *config;
- gboolean update_allocator;
- gboolean update_pool;
-
- gst_query_parse_allocation (query, &outcaps, NULL);
-
- /* we got configuration from our peer or the decide_allocation method,
- * parse them */
- if (gst_query_get_n_allocation_params (query) > 0) {
- /* try the allocator */
- gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
- update_allocator = TRUE;
- } else {
- allocator = NULL;
- gst_allocation_params_init (¶ms);
- update_allocator = FALSE;
- }
-
- if (gst_query_get_n_allocation_pools (query) > 0) {
- gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
- update_pool = TRUE;
- } else {
- pool = NULL;
- size = GST_VIDEO_INFO_SIZE (&scope->vinfo);
- min = max = 0;
- update_pool = FALSE;
- }
-
- if (pool == NULL) {
- /* we did not get a pool, make one ourselves then */
- pool = gst_video_buffer_pool_new ();
- }
-
- config = gst_buffer_pool_get_config (pool);
- gst_buffer_pool_config_set_params (config, outcaps, size, min, max);
- gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
- gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
- gst_buffer_pool_set_config (pool, config);
-
- if (update_allocator)
- gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms);
- else
- gst_query_add_allocation_param (query, allocator, ¶ms);
-
- if (allocator)
- gst_object_unref (allocator);
-
- if (update_pool)
- gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
- else
- gst_query_add_allocation_pool (query, pool, size, min, max);
-
- if (pool)
- gst_object_unref (pool);
-
- return TRUE;
-}
-
-static GstFlowReturn
-default_prepare_output_buffer (GstAudioVisualizer * scope, GstBuffer ** outbuf)
-{
- GstAudioVisualizerPrivate *priv;
-
- priv = scope->priv;
-
- g_assert (priv->pool != NULL);
-
- /* we can't reuse the input buffer */
- if (!priv->pool_active) {
- GST_DEBUG_OBJECT (scope, "setting pool %p active", priv->pool);
- if (!gst_buffer_pool_set_active (priv->pool, TRUE))
- goto activate_failed;
- priv->pool_active = TRUE;
- }
- GST_DEBUG_OBJECT (scope, "using pool alloc");
-
- return gst_buffer_pool_acquire_buffer (priv->pool, outbuf, NULL);
-
- /* ERRORS */
-activate_failed:
- {
- GST_ELEMENT_ERROR (scope, RESOURCE, SETTINGS,
- ("failed to activate bufferpool"), ("failed to activate bufferpool"));
- return GST_FLOW_ERROR;
- }
-}
-
-static GstFlowReturn
-gst_audio_visualizer_chain (GstPad * pad, GstObject * parent,
- GstBuffer * buffer)
-{
- GstFlowReturn ret = GST_FLOW_OK;
- GstAudioVisualizer *scope;
- GstAudioVisualizerPrivate *priv;
- GstAudioVisualizerClass *klass;
- GstBuffer *inbuf;
- guint64 dist, ts;
- guint avail, sbpf;
- gpointer adata;
- gint bps, channels, rate;
-
- scope = GST_AUDIO_VISUALIZER (parent);
- priv = scope->priv;
- klass = GST_AUDIO_VISUALIZER_CLASS (G_OBJECT_GET_CLASS (scope));
-
- GST_LOG_OBJECT (scope, "chainfunc called");
-
- /* resync on DISCONT */
- if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
- gst_adapter_clear (priv->adapter);
- }
-
- /* Make sure have an output format */
- if (gst_pad_check_reconfigure (priv->srcpad)) {
- if (!gst_audio_visualizer_src_negotiate (scope)) {
- gst_pad_mark_reconfigure (priv->srcpad);
- goto not_negotiated;
- }
- }
-
- channels = GST_AUDIO_INFO_CHANNELS (&scope->ainfo);
- rate = GST_AUDIO_INFO_RATE (&scope->ainfo);
- bps = GST_AUDIO_INFO_BPS (&scope->ainfo);
-
- if (bps == 0) {
- ret = GST_FLOW_NOT_NEGOTIATED;
- goto beach;
- }
-
- gst_adapter_push (priv->adapter, buffer);
-
- g_mutex_lock (&priv->config_lock);
-
- /* this is what we want */
- sbpf = scope->req_spf * channels * sizeof (gint16);
-
- inbuf = priv->inbuf;
- /* FIXME: the timestamp in the adapter would be different */
- gst_buffer_copy_into (inbuf, buffer, GST_BUFFER_COPY_METADATA, 0, -1);
-
- /* this is what we have */
- avail = gst_adapter_available (priv->adapter);
- GST_LOG_OBJECT (scope, "avail: %u, bpf: %u", avail, sbpf);
- while (avail >= sbpf) {
- GstBuffer *outbuf;
- GstVideoFrame outframe;
-
- /* get timestamp of the current adapter content */
- ts = gst_adapter_prev_pts (priv->adapter, &dist);
- if (GST_CLOCK_TIME_IS_VALID (ts)) {
- /* convert bytes to time */
- dist /= bps;
- ts += gst_util_uint64_scale_int (dist, GST_SECOND, rate);
- }
-
- /* check for QoS, don't compute buffers that are known to be late */
- if (GST_CLOCK_TIME_IS_VALID (ts)) {
- GstClockTime earliest_time;
- gdouble proportion;
- gint64 qostime;
-
- qostime =
- gst_segment_to_running_time (&priv->segment, GST_FORMAT_TIME,
- ts) + priv->frame_duration;
-
- GST_OBJECT_LOCK (scope);
- earliest_time = priv->earliest_time;
- proportion = priv->proportion;
- GST_OBJECT_UNLOCK (scope);
-
- if (GST_CLOCK_TIME_IS_VALID (earliest_time) && qostime <= earliest_time) {
- GstClockTime stream_time, jitter;
- GstMessage *qos_msg;
-
- GST_DEBUG_OBJECT (scope,
- "QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT,
- GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
-
- ++priv->dropped;
- stream_time = gst_segment_to_stream_time (&priv->segment,
- GST_FORMAT_TIME, ts);
- jitter = GST_CLOCK_DIFF (qostime, earliest_time);
- qos_msg = gst_message_new_qos (GST_OBJECT (scope), FALSE, qostime,
- stream_time, ts, GST_BUFFER_DURATION (buffer));
- gst_message_set_qos_values (qos_msg, jitter, proportion, 1000000);
- gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS,
- priv->processed, priv->dropped);
- gst_element_post_message (GST_ELEMENT (scope), qos_msg);
-
- goto skip;
- }
- }
-
- ++priv->processed;
-
- g_mutex_unlock (&priv->config_lock);
- ret = default_prepare_output_buffer (scope, &outbuf);
- g_mutex_lock (&priv->config_lock);
- /* recheck as the value could have changed */
- sbpf = scope->req_spf * channels * sizeof (gint16);
-
- /* no buffer allocated, we don't care why. */
- if (ret != GST_FLOW_OK)
- break;
-
- /* sync controlled properties */
- if (GST_CLOCK_TIME_IS_VALID (ts))
- gst_object_sync_values (GST_OBJECT (scope), ts);
-
- GST_BUFFER_TIMESTAMP (outbuf) = ts;
- GST_BUFFER_DURATION (outbuf) = priv->frame_duration;
-
- /* this can fail as the data size we need could have changed */
- if (!(adata = (gpointer) gst_adapter_map (priv->adapter, sbpf)))
- break;
-
- gst_video_frame_map (&outframe, &scope->vinfo, outbuf, GST_MAP_READWRITE);
-
- if (priv->shader) {
- gst_video_frame_copy (&outframe, &priv->tempframe);
- } else {
- /* gst_video_frame_clear() or is output frame already cleared */
- gint i;
-
- for (i = 0; i < scope->vinfo.finfo->n_planes; i++) {
- memset (outframe.data[i], 0, outframe.map[i].size);
- }
- }
-
- gst_buffer_replace_all_memory (inbuf,
- gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY, adata, sbpf, 0,
- sbpf, NULL, NULL));
-
- /* call class->render() vmethod */
- if (klass->render) {
- if (!klass->render (scope, inbuf, &outframe)) {
- ret = GST_FLOW_ERROR;
- gst_video_frame_unmap (&outframe);
- goto beach;
- } else {
- /* run various post processing (shading and geometric transformation) */
- /* FIXME: SHADER assumes 32bpp */
- if (priv->shader && GST_VIDEO_INFO_COMP_PSTRIDE (&scope->vinfo, 0) == 4) {
- priv->shader (scope, &outframe, &priv->tempframe);
- }
- }
- }
- gst_video_frame_unmap (&outframe);
-
- g_mutex_unlock (&priv->config_lock);
- ret = gst_pad_push (priv->srcpad, outbuf);
- outbuf = NULL;
- g_mutex_lock (&priv->config_lock);
-
- skip:
- /* recheck as the value could have changed */
- sbpf = scope->req_spf * channels * sizeof (gint16);
- GST_LOG_OBJECT (scope, "avail: %u, bpf: %u", avail, sbpf);
- /* we want to take less or more, depending on spf : req_spf */
- if (avail - sbpf >= sbpf) {
- gst_adapter_flush (priv->adapter, sbpf);
- gst_adapter_unmap (priv->adapter);
- } else if (avail >= sbpf) {
- /* just flush a bit and stop */
- gst_adapter_flush (priv->adapter, (avail - sbpf));
- gst_adapter_unmap (priv->adapter);
- break;
- }
- avail = gst_adapter_available (priv->adapter);
-
- if (ret != GST_FLOW_OK)
- break;
- }
-
- g_mutex_unlock (&priv->config_lock);
-
-beach:
- return ret;
-
- /* ERRORS */
-not_negotiated:
- {
- GST_DEBUG_OBJECT (scope, "Failed to renegotiate");
- return GST_FLOW_NOT_NEGOTIATED;
- }
-}
-
-static gboolean
-gst_audio_visualizer_src_event (GstPad * pad, GstObject * parent,
- GstEvent * event)
-{
- gboolean res;
- GstAudioVisualizer *scope;
- GstAudioVisualizerPrivate *priv;
-
- scope = GST_AUDIO_VISUALIZER (parent);
- priv = scope->priv;
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_QOS:
- {
- gdouble proportion;
- GstClockTimeDiff diff;
- GstClockTime timestamp;
-
- gst_event_parse_qos (event, NULL, &proportion, &diff, ×tamp);
-
- /* save stuff for the _chain() function */
- GST_OBJECT_LOCK (scope);
- priv->proportion = proportion;
- if (diff >= 0)
- /* we're late, this is a good estimate for next displayable
- * frame (see part-qos.txt) */
- priv->earliest_time = timestamp + 2 * diff + priv->frame_duration;
- else
- priv->earliest_time = timestamp + diff;
- GST_OBJECT_UNLOCK (scope);
-
- res = gst_pad_push_event (priv->sinkpad, event);
- break;
- }
- case GST_EVENT_RECONFIGURE:
- /* dont't forward */
- gst_event_unref (event);
- res = TRUE;
- break;
- default:
- res = gst_pad_event_default (pad, parent, event);
- break;
- }
-
- return res;
-}
-
-static gboolean
-gst_audio_visualizer_sink_event (GstPad * pad, GstObject * parent,
- GstEvent * event)
-{
- gboolean res;
- GstAudioVisualizer *scope;
-
- scope = GST_AUDIO_VISUALIZER (parent);
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_CAPS:
- {
- GstCaps *caps;
-
- gst_event_parse_caps (event, &caps);
- res = gst_audio_visualizer_sink_setcaps (scope, caps);
- gst_event_unref (event);
- break;
- }
- case GST_EVENT_FLUSH_STOP:
- gst_audio_visualizer_reset (scope);
- res = gst_pad_push_event (scope->priv->srcpad, event);
- break;
- case GST_EVENT_SEGMENT:
- {
- /* the newsegment values are used to clip the input samples
- * and to convert the incomming timestamps to running time so
- * we can do QoS */
- gst_event_copy_segment (event, &scope->priv->segment);
-
- res = gst_pad_push_event (scope->priv->srcpad, event);
- break;
- }
- default:
- res = gst_pad_event_default (pad, parent, event);
- break;
- }
-
- return res;
-}
-
-static gboolean
-gst_audio_visualizer_src_query (GstPad * pad, GstObject * parent,
- GstQuery * query)
-{
- gboolean res = FALSE;
- GstAudioVisualizer *scope;
-
- scope = GST_AUDIO_VISUALIZER (parent);
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_LATENCY:
- {
- /* We need to send the query upstream and add the returned latency to our
- * own */
- GstClockTime min_latency, max_latency;
- gboolean us_live;
- GstClockTime our_latency;
- guint max_samples;
- gint rate = GST_AUDIO_INFO_RATE (&scope->ainfo);
-
- if (rate == 0)
- break;
-
- if ((res = gst_pad_peer_query (scope->priv->sinkpad, query))) {
- gst_query_parse_latency (query, &us_live, &min_latency, &max_latency);
-
- GST_DEBUG_OBJECT (scope, "Peer latency: min %"
- GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
- GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
-
- /* the max samples we must buffer buffer */
- max_samples = MAX (scope->req_spf, scope->priv->spf);
- our_latency = gst_util_uint64_scale_int (max_samples, GST_SECOND, rate);
-
- GST_DEBUG_OBJECT (scope, "Our latency: %" GST_TIME_FORMAT,
- GST_TIME_ARGS (our_latency));
-
- /* we add some latency but only if we need to buffer more than what
- * upstream gives us */
- min_latency += our_latency;
- if (max_latency != -1)
- max_latency += our_latency;
-
- GST_DEBUG_OBJECT (scope, "Calculated total latency : min %"
- GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
- GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
-
- gst_query_set_latency (query, TRUE, min_latency, max_latency);
- }
- break;
- }
- default:
- res = gst_pad_query_default (pad, parent, query);
- break;
- }
-
- return res;
-}
-
-static GstStateChangeReturn
-gst_audio_visualizer_change_state (GstElement * element,
- GstStateChange transition)
-{
- GstStateChangeReturn ret;
- GstAudioVisualizer *scope;
-
- scope = GST_AUDIO_VISUALIZER (element);
-
- switch (transition) {
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- gst_audio_visualizer_reset (scope);
- break;
- default:
- break;
- }
-
- ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- gst_audio_visualizer_set_allocation (scope, NULL, NULL, NULL, NULL);
- break;
- case GST_STATE_CHANGE_READY_TO_NULL:
- break;
- default:
- break;
- }
-
- return ret;
-}
projects / platform / upstream / gstreamer.git / commitdiff