gstreamer/gst/monoscope/gstmonoscope.c
Tim-Philipp Müller 76ff577a41 gst/monoscope/gstmonoscope.c: Don't unref buffers of which we've already given away ownership to the adapter.
Original commit message from CVS:
* gst/monoscope/gstmonoscope.c: (gst_monoscope_chain):
Don't unref buffers of which we've already given away
ownership to the adapter.
2006-08-22 12:10:32 +00:00

558 lines
16 KiB
C

/* gstmonoscope.c: implementation of monoscope drawing element
* Copyright (C) <2002> Richard Boulton <richard@tartarus.org>
* Copyright (C) <2006> Tim-Philipp Müller <tim centricular net>
* Copyright (C) <2006> Wim Taymans <wim at fluendo dot com>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-monoscope
* @see_also: monoscope
*
* <refsect2>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch -v audiotestsrc ! audioconvert ! monoscope ! ffmpegcolorspace ! ximagesink
* </programlisting>
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <string.h>
#include "gstmonoscope.h"
#include "monoscope.h"
GST_DEBUG_CATEGORY_STATIC (monoscope_debug);
#define GST_CAT_DEFAULT monoscope_debug
/* elementfactory information */
static const GstElementDetails gst_monoscope_details =
GST_ELEMENT_DETAILS ("Monoscope",
"Visualization",
"Displays a highly stabilised waveform of audio input",
"Richard Boulton <richard@tartarus.org>");
#if G_BYTE_ORDER == G_BIG_ENDIAN
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-rgb, "
"bpp = (int) 32, "
"depth = (int) 24, "
"endianness = (int) BIG_ENDIAN, "
"red_mask = (int) " GST_VIDEO_BYTE2_MASK_32 ", "
"green_mask = (int) " GST_VIDEO_BYTE3_MASK_32 ", "
"blue_mask = (int) " GST_VIDEO_BYTE4_MASK_32 ", "
"width = (int)256, "
"height = (int)128, " "framerate = " GST_VIDEO_FPS_RANGE)
);
#else
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-rgb, "
"bpp = (int) 32, "
"depth = (int) 24, "
"endianness = (int) BIG_ENDIAN, "
"red_mask = (int) " GST_VIDEO_BYTE3_MASK_32 ", "
"green_mask = (int) " GST_VIDEO_BYTE2_MASK_32 ", "
"blue_mask = (int) " GST_VIDEO_BYTE1_MASK_32 ", "
"width = (int)256, "
"height = (int)128, " "framerate = " GST_VIDEO_FPS_RANGE)
);
#endif
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS)
);
GST_BOILERPLATE (GstMonoscope, gst_monoscope, GstElement, GST_TYPE_ELEMENT);
static void gst_monoscope_finalize (GObject * object);
static GstFlowReturn gst_monoscope_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_monoscope_src_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_monoscope_sink_setcaps (GstPad * pad, GstCaps * caps);
static void gst_monoscope_reset (GstMonoscope * monoscope);
static gboolean gst_monoscope_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_monoscope_src_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn gst_monoscope_change_state (GstElement * element,
GstStateChange transition);
static void
gst_monoscope_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (element_class, &gst_monoscope_details);
}
static void
gst_monoscope_class_init (GstMonoscopeClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_monoscope_finalize;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_monoscope_change_state);
}
static void
gst_monoscope_init (GstMonoscope * monoscope, GstMonoscopeClass * klass)
{
monoscope->sinkpad =
gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_chain_function (monoscope->sinkpad,
GST_DEBUG_FUNCPTR (gst_monoscope_chain));
gst_pad_set_event_function (monoscope->sinkpad,
GST_DEBUG_FUNCPTR (gst_monoscope_sink_event));
gst_pad_set_setcaps_function (monoscope->sinkpad,
GST_DEBUG_FUNCPTR (gst_monoscope_sink_setcaps));
gst_element_add_pad (GST_ELEMENT (monoscope), monoscope->sinkpad);
monoscope->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_setcaps_function (monoscope->srcpad,
GST_DEBUG_FUNCPTR (gst_monoscope_src_setcaps));
gst_pad_set_event_function (monoscope->srcpad,
GST_DEBUG_FUNCPTR (gst_monoscope_src_event));
gst_element_add_pad (GST_ELEMENT (monoscope), monoscope->srcpad);
monoscope->adapter = gst_adapter_new ();
monoscope->next_ts = GST_CLOCK_TIME_NONE;
monoscope->bps = sizeof (gint16);
/* reset the initial video state */
monoscope->width = 256;
monoscope->height = 128;
monoscope->fps_num = 25; /* desired frame rate */
monoscope->fps_denom = 1;
monoscope->visstate = NULL;
}
static void
gst_monoscope_finalize (GObject * object)
{
GstMonoscope *monoscope = GST_MONOSCOPE (object);
if (monoscope->visstate)
monoscope_close (monoscope->visstate);
g_object_unref (monoscope->adapter);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_monoscope_reset (GstMonoscope * monoscope)
{
monoscope->next_ts = GST_CLOCK_TIME_NONE;
gst_adapter_clear (monoscope->adapter);
gst_segment_init (&monoscope->segment, GST_FORMAT_UNDEFINED);
GST_OBJECT_LOCK (monoscope);
monoscope->proportion = 1.0;
monoscope->earliest_time = -1;
GST_OBJECT_UNLOCK (monoscope);
}
static gboolean
gst_monoscope_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstMonoscope *monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "rate", &monoscope->rate);
GST_DEBUG_OBJECT (monoscope, "sample rate = %d", monoscope->rate);
return TRUE;
}
static gboolean
gst_monoscope_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstMonoscope *monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &monoscope->width);
gst_structure_get_int (structure, "height", &monoscope->height);
gst_structure_get_fraction (structure, "framerate", &monoscope->fps_num,
&monoscope->fps_denom);
monoscope->outsize = monoscope->width * monoscope->height * 4;
monoscope->frame_duration = gst_util_uint64_scale_int (GST_SECOND,
monoscope->fps_denom, monoscope->fps_num);
monoscope->spf =
gst_util_uint64_scale_int (monoscope->rate, monoscope->fps_denom,
monoscope->fps_num);
GST_DEBUG_OBJECT (monoscope, "dimension %dx%d, framerate %d/%d, spf %d",
monoscope->width, monoscope->height, monoscope->fps_num,
monoscope->fps_denom, monoscope->spf);
if (monoscope->visstate) {
monoscope_close (monoscope->visstate);
monoscope->visstate = NULL;
}
monoscope->visstate = monoscope_init (monoscope->width, monoscope->height);
return (monoscope->visstate != NULL);
}
static gboolean
gst_monoscope_src_negotiate (GstMonoscope * monoscope)
{
GstCaps *othercaps, *target, *intersect;
GstStructure *structure;
const GstCaps *templ;
templ = gst_pad_get_pad_template_caps (monoscope->srcpad);
GST_DEBUG_OBJECT (monoscope, "performing negotiation");
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (monoscope->srcpad);
if (othercaps) {
intersect = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
if (gst_caps_is_empty (intersect))
goto no_format;
target = gst_caps_copy_nth (intersect, 0);
gst_caps_unref (intersect);
} else {
target = gst_caps_ref ((GstCaps *) templ);
}
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 25, 1);
gst_pad_set_caps (monoscope->srcpad, target);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (intersect);
return FALSE;
}
}
static GstFlowReturn
get_buffer (GstMonoscope * monoscope, GstBuffer ** outbuf)
{
GstFlowReturn ret;
if (GST_PAD_CAPS (monoscope->srcpad) == NULL) {
if (!gst_monoscope_src_negotiate (monoscope))
return GST_FLOW_NOT_NEGOTIATED;
}
GST_LOG_OBJECT (monoscope, "allocating output buffer of size %d with caps %"
GST_PTR_FORMAT, monoscope->outsize, GST_PAD_CAPS (monoscope->srcpad));
ret =
gst_pad_alloc_buffer_and_set_caps (monoscope->srcpad,
GST_BUFFER_OFFSET_NONE, monoscope->outsize,
GST_PAD_CAPS (monoscope->srcpad), outbuf);
if (ret != GST_FLOW_OK)
return ret;
if (*outbuf == NULL)
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_monoscope_chain (GstPad * pad, GstBuffer * inbuf)
{
GstMonoscope *monoscope;
GstFlowReturn flow_ret;
monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad));
/* don't try to combine samples from discont buffer */
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_DISCONT)) {
gst_adapter_clear (monoscope->adapter);
monoscope->next_ts = GST_CLOCK_TIME_NONE;
}
/* Match timestamps from the incoming audio */
if (GST_BUFFER_TIMESTAMP (inbuf) != GST_CLOCK_TIME_NONE)
monoscope->next_ts = GST_BUFFER_TIMESTAMP (inbuf);
GST_LOG_OBJECT (monoscope, "in buffer has %d samples, ts=%" GST_TIME_FORMAT,
GST_BUFFER_SIZE (inbuf) / monoscope->bps,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf)));
gst_adapter_push (monoscope->adapter, inbuf);
inbuf = NULL;
flow_ret = GST_FLOW_OK;
/* Collect samples until we have enough for an output frame */
while (flow_ret == GST_FLOW_OK) {
gint16 *samples;
GstBuffer *outbuf = NULL;
guint32 *pixels, avail, bytesperframe;
avail = gst_adapter_available (monoscope->adapter);
GST_LOG_OBJECT (monoscope, "bytes avail now %u", avail);
/* do negotiation if not done yet, so ->spf etc. is set */
if (GST_PAD_CAPS (monoscope->srcpad) == NULL) {
flow_ret = get_buffer (monoscope, &outbuf);
if (flow_ret != GST_FLOW_OK)
goto out;
gst_buffer_unref (outbuf);
outbuf = NULL;
}
bytesperframe = monoscope->spf * monoscope->bps;
if (avail < bytesperframe)
break;
/* FIXME: something is wrong with QoS, we are skipping way too much
* stuff even with very low CPU loads */
#if 0
if (monoscope->next_ts != -1) {
gboolean need_skip;
gint64 qostime;
qostime = gst_segment_to_running_time (&monoscope->segment,
GST_FORMAT_TIME, monoscope->next_ts);
GST_OBJECT_LOCK (monoscope);
/* check for QoS, don't compute buffers that are known to be late */
need_skip =
GST_CLOCK_TIME_IS_VALID (monoscope->earliest_time) &&
qostime <= monoscope->earliest_time;
GST_OBJECT_UNLOCK (monoscope);
if (need_skip) {
GST_WARNING_OBJECT (monoscope,
"QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT,
GST_TIME_ARGS (qostime), GST_TIME_ARGS (monoscope->earliest_time));
goto skip;
}
}
#endif
samples = (gint16 *) gst_adapter_peek (monoscope->adapter, bytesperframe);
if (monoscope->spf < 512) {
gint16 in_data[512], i;
for (i = 0; i < 512; ++i) {
gdouble off;
off = ((gdouble) i * (gdouble) monoscope->spf) / 512.0;
in_data[i] = samples[MIN ((guint) off, monoscope->spf)];
}
pixels = monoscope_update (monoscope->visstate, in_data);
} else {
/* not really correct, but looks much prettier */
pixels = monoscope_update (monoscope->visstate, samples);
}
flow_ret = get_buffer (monoscope, &outbuf);
if (flow_ret != GST_FLOW_OK)
goto out;
memcpy (GST_BUFFER_DATA (outbuf), pixels, monoscope->outsize);
GST_BUFFER_TIMESTAMP (outbuf) = monoscope->next_ts;
GST_BUFFER_DURATION (outbuf) = monoscope->frame_duration;
flow_ret = gst_pad_push (monoscope->srcpad, outbuf);
#if 0
skip:
#endif
if (GST_CLOCK_TIME_IS_VALID (monoscope->next_ts))
monoscope->next_ts += monoscope->frame_duration;
gst_adapter_flush (monoscope->adapter, bytesperframe);
}
out:
return flow_ret;
}
static gboolean
gst_monoscope_sink_event (GstPad * pad, GstEvent * event)
{
GstMonoscope *monoscope;
gboolean res;
monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_push_event (monoscope->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
gst_monoscope_reset (monoscope);
res = gst_pad_push_event (monoscope->srcpad, event);
break;
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate, arate;
gint64 start, stop, time;
gboolean update;
/* 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_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
/* now configure the values */
gst_segment_set_newsegment_full (&monoscope->segment, update,
rate, arate, format, start, stop, time);
res = gst_pad_push_event (monoscope->srcpad, event);
break;
}
default:
res = gst_pad_push_event (monoscope->srcpad, event);
break;
}
gst_object_unref (monoscope);
return res;
}
static gboolean
gst_monoscope_src_event (GstPad * pad, GstEvent * event)
{
GstMonoscope *monoscope;
gboolean res;
monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, &proportion, &diff, &timestamp);
/* save stuff for the _chain() function */
GST_OBJECT_LOCK (monoscope);
monoscope->proportion = proportion;
if (diff >= 0)
/* we're late, this is a good estimate for next displayable
* frame (see part-qos.txt) */
monoscope->earliest_time =
timestamp + 2 * diff + monoscope->frame_duration;
else
monoscope->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (monoscope);
res = gst_pad_push_event (monoscope->sinkpad, event);
break;
}
default:
res = gst_pad_push_event (monoscope->sinkpad, event);
break;
}
gst_object_unref (monoscope);
return res;
}
static GstStateChangeReturn
gst_monoscope_change_state (GstElement * element, GstStateChange transition)
{
GstMonoscope *monoscope = GST_MONOSCOPE (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_monoscope_reset (monoscope);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (monoscope_debug, "monoscope", 0,
"monoscope element");
return gst_element_register (plugin, "monoscope",
GST_RANK_NONE, GST_TYPE_MONOSCOPE);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"monoscope",
"Monoscope visualization",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);