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gstaudiovisualizer.c
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gstaudiovisualizer.c
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/* 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
* @title: GstAudioVisualizer
* @short_description: Base class for visualizers.
*
* 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"
#include "pbutils-enumtypes.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 gint private_offset = 0;
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_dispose (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);
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 */
/* 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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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;
guint r = (scope->priv->shade_amount >> 16) & 0xff;
guint g = (scope->priv->shade_amount >> 8) & 0xff;
guint b = (scope->priv->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)
{
switch (scope->priv->shader_type) {
case GST_AUDIO_VISUALIZER_SHADER_NONE:
scope->priv->shader = NULL;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE:
scope->priv->shader = shader_fade;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_UP:
scope->priv->shader = shader_fade_and_move_up;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_DOWN:
scope->priv->shader = shader_fade_and_move_down;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_LEFT:
scope->priv->shader = shader_fade_and_move_left;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_RIGHT:
scope->priv->shader = shader_fade_and_move_right;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_OUT:
scope->priv->shader = shader_fade_and_move_horiz_out;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_HORIZ_IN:
scope->priv->shader = shader_fade_and_move_horiz_in;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_OUT:
scope->priv->shader = shader_fade_and_move_vert_out;
break;
case GST_AUDIO_VISUALIZER_SHADER_FADE_AND_MOVE_VERT_IN:
scope->priv->shader = shader_fade_and_move_vert_in;
break;
default:
GST_ERROR ("invalid shader function");
scope->priv->shader = NULL;
break;
}
}
/* base class */
GType
gst_audio_visualizer_get_type (void)
{
static 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", &audio_visualizer_info, G_TYPE_FLAG_ABSTRACT);
private_offset =
g_type_add_instance_private (_type, sizeof (GstAudioVisualizerPrivate));
g_once_init_leave (&audio_visualizer_type, _type);
}
return (GType) audio_visualizer_type;
}
static inline GstAudioVisualizerPrivate *
gst_audio_visualizer_get_instance_private (GstAudioVisualizer * self)
{
return (G_STRUCT_MEMBER_P (self, private_offset));
}
static void
gst_audio_visualizer_class_init (GstAudioVisualizerClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
if (private_offset != 0)
g_type_class_adjust_private_offset (klass, &private_offset);
parent_class = g_type_class_peek_parent (klass);
GST_DEBUG_CATEGORY_INIT (audio_visualizer_debug,
"baseaudiovisualizer-libvisual", 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->dispose = gst_audio_visualizer_dispose;
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_instance_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_dispose (GObject * object)
{
GstAudioVisualizer *scope = GST_AUDIO_VISUALIZER (object);
if (scope->priv->adapter) {
g_object_unref (scope->priv->adapter);
scope->priv->adapter = NULL;
}
if (scope->priv->inbuf) {
gst_buffer_unref (scope->priv->inbuf);
scope->priv->inbuf = NULL;
}
if (scope->priv->tempbuf) {
gst_video_frame_unmap (&scope->priv->tempframe);
gst_buffer_unref (scope->priv->tempbuf);
scope->priv->tempbuf = NULL;
}
if (scope->priv->config_lock.p) {
g_mutex_clear (&scope->priv->config_lock);
scope->priv->config_lock.p = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_audio_visualizer_reset (GstAudioVisualizer * scope)
{
gst_adapter_clear (scope->priv->adapter);
gst_segment_init (&scope->priv->segment, GST_FORMAT_UNDEFINED);
GST_OBJECT_LOCK (scope);
scope->priv->proportion = 1.0;
scope->priv->earliest_time = -1;
scope->priv->dropped = 0;
scope->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;
gboolean res;
if (!gst_video_info_from_caps (&info, caps))
goto wrong_caps;
klass = GST_AUDIO_VISUALIZER_CLASS (G_OBJECT_GET_CLASS (scope));
scope->vinfo = info;
scope->priv->frame_duration = gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&info), GST_VIDEO_INFO_FPS_N (&info));
scope->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 = scope->priv->spf;
if (scope->priv->tempbuf) {
gst_video_frame_unmap (&scope->priv->tempframe);
gst_buffer_unref (scope->priv->tempbuf);
}
scope->priv->tempbuf = gst_buffer_new_wrapped (g_malloc0 (scope->vinfo.size),
scope->vinfo.size);
gst_video_frame_map (&scope->priv->tempframe, &scope->vinfo,
scope->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",
scope->priv->spf, scope->req_spf);
gst_pad_set_caps (scope->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);
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 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,
const 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);