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gstreamer/subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstaudiovisualizer.c
Piotr Brzeziński 66283e8865 audiovisualizer: Don't wrap temporary memory in buffers 
Avoids potentially ending up with the buffermemory pointing to already-freed or reused addresses.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6349>
2024-03-13 07:19:39 +00:00

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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;
}
/* rewind one stride */
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, &params);
} else {
allocator = NULL;
gst_allocation_params_init (&params);
}
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, &params,
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, &params);
update_allocator = TRUE;
} else {
allocator = NULL;
gst_allocation_params_init (&params);
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, &params);
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, &params);
else
gst_query_add_allocation_param (query, allocator, &params);
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;
GstAudioVisualizerClass *klass;
GstBuffer *inbuf, *databuf;
guint64 dist, ts;
guint avail, sbpf;
gint bpf, rate;
scope = GST_AUDIO_VISUALIZER (parent);
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 (scope->priv->adapter);
}
/* Make sure have an output format */
if (gst_pad_check_reconfigure (scope->priv->srcpad)) {
if (!gst_audio_visualizer_src_negotiate (scope)) {
gst_pad_mark_reconfigure (scope->priv->srcpad);
goto not_negotiated;
}
}
rate = GST_AUDIO_INFO_RATE (&scope->ainfo);
bpf = GST_AUDIO_INFO_BPF (&scope->ainfo);
if (bpf == 0) {
ret = GST_FLOW_NOT_NEGOTIATED;
goto beach;
}
gst_adapter_push (scope->priv->adapter, buffer);
g_mutex_lock (&scope->priv->config_lock);
/* this is what we want */
sbpf = scope->req_spf * bpf;
inbuf = scope->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 (scope->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 (scope->priv->adapter, &dist);
if (GST_CLOCK_TIME_IS_VALID (ts)) {
/* convert bytes to time */
ts += gst_util_uint64_scale_int (dist, GST_SECOND, rate * bpf);
}
/* 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 (&scope->priv->segment,
GST_FORMAT_TIME, ts) + scope->priv->frame_duration;
GST_OBJECT_LOCK (scope);
earliest_time = scope->priv->earliest_time;
proportion = scope->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));
++scope->priv->dropped;
stream_time = gst_segment_to_stream_time (&scope->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,
scope->priv->processed, scope->priv->dropped);
gst_element_post_message (GST_ELEMENT (scope), qos_msg);
goto skip;
}
}
++scope->priv->processed;
g_mutex_unlock (&scope->priv->config_lock);
ret = default_prepare_output_buffer (scope, &outbuf);
g_mutex_lock (&scope->priv->config_lock);
/* recheck as the value could have changed */
sbpf = scope->req_spf * bpf;
/* 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_PTS (outbuf) = ts;
GST_BUFFER_DURATION (outbuf) = scope->priv->frame_duration;
/* this can fail as the data size we need could have changed */
if (!(databuf = gst_adapter_get_buffer (scope->priv->adapter, sbpf)))
break;
gst_video_frame_map (&outframe, &scope->vinfo, outbuf,
GST_MAP_READWRITE | GST_VIDEO_FRAME_MAP_FLAG_NO_REF);
if (scope->priv->shader) {
gst_video_frame_copy (&outframe, &scope->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_copy_into (inbuf, databuf, GST_BUFFER_COPY_MEMORY, 0, sbpf);
gst_buffer_unref (databuf);
/* 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 (scope->priv->shader &&
GST_VIDEO_INFO_COMP_PSTRIDE (&scope->vinfo, 0) == 4) {
scope->priv->shader (scope, &outframe, &scope->priv->tempframe);
}
}
}
gst_video_frame_unmap (&outframe);
g_mutex_unlock (&scope->priv->config_lock);
ret = gst_pad_push (scope->priv->srcpad, outbuf);
outbuf = NULL;
g_mutex_lock (&scope->priv->config_lock);
skip:
/* recheck as the value could have changed */
sbpf = scope->req_spf * bpf;
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 (scope->priv->adapter, sbpf);
gst_adapter_unmap (scope->priv->adapter);
} else if (avail >= sbpf) {
/* just flush a bit and stop */
gst_adapter_flush (scope->priv->adapter, (avail - sbpf));
gst_adapter_unmap (scope->priv->adapter);
break;
}
avail = gst_adapter_available (scope->priv->adapter);
if (ret != GST_FLOW_OK)
break;
}
g_mutex_unlock (&scope->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;
scope = GST_AUDIO_VISUALIZER (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, NULL, &proportion, &diff, &timestamp);
/* save stuff for the _chain() function */
GST_OBJECT_LOCK (scope);
scope->priv->proportion = proportion;
if (diff >= 0)
/* we're late, this is a good estimate for next displayable
* frame (see part-qos.txt) */
scope->priv->earliest_time = timestamp + 2 * diff +
scope->priv->frame_duration;
else
scope->priv->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (scope);
res = gst_pad_push_event (scope->priv->sinkpad, event);
break;
}
case GST_EVENT_RECONFIGURE:
/* don'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 incoming 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;
}
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