gstreamer/gst/inter/gstintervideosrc.c
David Schleef e9f0e27596 inter: new intermediate surface plugin
This set of elements allows easily rendering audio and video to
an intermediate surface that is then used as a source in a different
pipeline.
2011-07-04 16:47:50 -07:00

510 lines
15 KiB
C

/* GStreamer
* Copyright (C) 2011 David A. Schleef <ds@schleef.org>
*
* 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 Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstintervideosrc
*
* The intervideosrc element does FIXME stuff.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v fakesrc ! intervideosrc ! FIXME ! fakesink
* ]|
* FIXME Describe what the pipeline does.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasesrc.h>
#include <gst/video/video.h>
#include "gstintervideosrc.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_inter_video_src_debug_category);
#define GST_CAT_DEFAULT gst_inter_video_src_debug_category
/* prototypes */
static void gst_inter_video_src_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_inter_video_src_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_inter_video_src_dispose (GObject * object);
static void gst_inter_video_src_finalize (GObject * object);
static GstCaps *gst_inter_video_src_get_caps (GstBaseSrc * src);
static gboolean gst_inter_video_src_set_caps (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_inter_video_src_negotiate (GstBaseSrc * src);
static gboolean gst_inter_video_src_newsegment (GstBaseSrc * src);
static gboolean gst_inter_video_src_start (GstBaseSrc * src);
static gboolean gst_inter_video_src_stop (GstBaseSrc * src);
static void
gst_inter_video_src_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static gboolean gst_inter_video_src_is_seekable (GstBaseSrc * src);
static gboolean gst_inter_video_src_unlock (GstBaseSrc * src);
static gboolean gst_inter_video_src_event (GstBaseSrc * src, GstEvent * event);
static GstFlowReturn
gst_inter_video_src_create (GstBaseSrc * src, guint64 offset, guint size,
GstBuffer ** buf);
static gboolean gst_inter_video_src_do_seek (GstBaseSrc * src,
GstSegment * segment);
static gboolean gst_inter_video_src_query (GstBaseSrc * src, GstQuery * query);
static gboolean gst_inter_video_src_check_get_range (GstBaseSrc * src);
static void gst_inter_video_src_fixate (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_inter_video_src_unlock_stop (GstBaseSrc * src);
static gboolean
gst_inter_video_src_prepare_seek_segment (GstBaseSrc * src, GstEvent * seek,
GstSegment * segment);
enum
{
PROP_0
};
/* pad templates */
static GstStaticPadTemplate gst_inter_video_src_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
/* class initialization */
#define DEBUG_INIT(bla) \
GST_DEBUG_CATEGORY_INIT (gst_inter_video_src_debug_category, "intervideosrc", 0, \
"debug category for intervideosrc element");
GST_BOILERPLATE_FULL (GstInterVideoSrc, gst_inter_video_src, GstBaseSrc,
GST_TYPE_BASE_SRC, DEBUG_INIT);
static void
gst_inter_video_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_inter_video_src_src_template));
gst_element_class_set_details_simple (element_class, "FIXME Long name",
"Generic", "FIXME Description", "FIXME <fixme@example.com>");
}
static void
gst_inter_video_src_class_init (GstInterVideoSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);
gobject_class->set_property = gst_inter_video_src_set_property;
gobject_class->get_property = gst_inter_video_src_get_property;
gobject_class->dispose = gst_inter_video_src_dispose;
gobject_class->finalize = gst_inter_video_src_finalize;
if (0)
base_src_class->get_caps = GST_DEBUG_FUNCPTR (gst_inter_video_src_get_caps);
base_src_class->set_caps = GST_DEBUG_FUNCPTR (gst_inter_video_src_set_caps);
if (0)
base_src_class->negotiate =
GST_DEBUG_FUNCPTR (gst_inter_video_src_negotiate);
if (0)
base_src_class->newsegment =
GST_DEBUG_FUNCPTR (gst_inter_video_src_newsegment);
base_src_class->start = GST_DEBUG_FUNCPTR (gst_inter_video_src_start);
base_src_class->stop = GST_DEBUG_FUNCPTR (gst_inter_video_src_stop);
base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_inter_video_src_get_times);
if (0)
base_src_class->is_seekable =
GST_DEBUG_FUNCPTR (gst_inter_video_src_is_seekable);
base_src_class->unlock = GST_DEBUG_FUNCPTR (gst_inter_video_src_unlock);
base_src_class->event = GST_DEBUG_FUNCPTR (gst_inter_video_src_event);
base_src_class->create = GST_DEBUG_FUNCPTR (gst_inter_video_src_create);
if (0)
base_src_class->do_seek = GST_DEBUG_FUNCPTR (gst_inter_video_src_do_seek);
base_src_class->query = GST_DEBUG_FUNCPTR (gst_inter_video_src_query);
if (0)
base_src_class->check_get_range =
GST_DEBUG_FUNCPTR (gst_inter_video_src_check_get_range);
base_src_class->fixate = GST_DEBUG_FUNCPTR (gst_inter_video_src_fixate);
if (0)
base_src_class->unlock_stop =
GST_DEBUG_FUNCPTR (gst_inter_video_src_unlock_stop);
if (0)
base_src_class->prepare_seek_segment =
GST_DEBUG_FUNCPTR (gst_inter_video_src_prepare_seek_segment);
}
static void
gst_inter_video_src_init (GstInterVideoSrc * intervideosrc,
GstInterVideoSrcClass * intervideosrc_class)
{
intervideosrc->srcpad =
gst_pad_new_from_static_template (&gst_inter_video_src_src_template,
"src");
gst_base_src_set_format (GST_BASE_SRC (intervideosrc), GST_FORMAT_TIME);
gst_base_src_set_live (GST_BASE_SRC (intervideosrc), TRUE);
intervideosrc->surface = gst_inter_surface_get ("default");
}
void
gst_inter_video_src_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
/* GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (object); */
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_inter_video_src_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
/* GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (object); */
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_inter_video_src_dispose (GObject * object)
{
/* GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (object); */
/* clean up as possible. may be called multiple times */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_inter_video_src_finalize (GObject * object)
{
/* GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (object); */
/* clean up object here */
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_inter_video_src_get_caps (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "get_caps");
return NULL;
}
static gboolean
gst_inter_video_src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
gboolean ret;
GstVideoFormat format;
int width, height;
int fps_n, fps_d;
GST_DEBUG_OBJECT (intervideosrc, "set_caps");
ret = gst_video_format_parse_caps (caps, &format, &width, &height);
ret &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
if (ret) {
intervideosrc->format = format;
intervideosrc->width = width;
intervideosrc->height = height;
intervideosrc->fps_n = fps_n;
intervideosrc->fps_d = fps_d;
GST_DEBUG ("fps %d/%d", fps_n, fps_d);
}
return ret;
}
static gboolean
gst_inter_video_src_negotiate (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "negotiate");
return TRUE;
}
static gboolean
gst_inter_video_src_newsegment (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "newsegment");
return TRUE;
}
static gboolean
gst_inter_video_src_start (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "start");
return TRUE;
}
static gboolean
gst_inter_video_src_stop (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "stop");
return TRUE;
}
static void
gst_inter_video_src_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "get_times");
/* for live sources, sync on the timestamp of the buffer */
if (gst_base_src_is_live (src)) {
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
/* get duration to calculate end time */
GstClockTime duration = GST_BUFFER_DURATION (buffer);
if (GST_CLOCK_TIME_IS_VALID (duration)) {
*end = timestamp + duration;
}
*start = timestamp;
}
} else {
*start = -1;
*end = -1;
}
}
static gboolean
gst_inter_video_src_is_seekable (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "is_seekable");
return FALSE;
}
static gboolean
gst_inter_video_src_unlock (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "unlock");
return TRUE;
}
static gboolean
gst_inter_video_src_event (GstBaseSrc * src, GstEvent * event)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "event");
return TRUE;
}
static GstFlowReturn
gst_inter_video_src_create (GstBaseSrc * src, guint64 offset, guint size,
GstBuffer ** buf)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GstBuffer *buffer;
guint8 *data;
GST_DEBUG_OBJECT (intervideosrc, "create");
buffer = NULL;
g_mutex_lock (intervideosrc->surface->mutex);
if (intervideosrc->surface->video_buffer) {
buffer = gst_buffer_ref (intervideosrc->surface->video_buffer);
intervideosrc->surface->video_buffer_count++;
if (intervideosrc->surface->video_buffer_count >= 30) {
gst_buffer_unref (intervideosrc->surface->video_buffer);
intervideosrc->surface->video_buffer = NULL;
}
}
g_mutex_unlock (intervideosrc->surface->mutex);
if (buffer == NULL) {
buffer =
gst_buffer_new_and_alloc (gst_video_format_get_size
(intervideosrc->format, intervideosrc->width, intervideosrc->height));
data = GST_BUFFER_DATA (buffer);
memset (data, 16,
gst_video_format_get_row_stride (intervideosrc->format, 0,
intervideosrc->width) *
gst_video_format_get_component_height (intervideosrc->format, 0,
intervideosrc->height));
memset (data + gst_video_format_get_component_offset (intervideosrc->format,
1, intervideosrc->width, intervideosrc->height),
128,
2 * gst_video_format_get_row_stride (intervideosrc->format, 1,
intervideosrc->width) *
gst_video_format_get_component_height (intervideosrc->format, 1,
intervideosrc->height));
#if 0
{
int i;
for (i = 0; i < 10000; i++) {
data[i] = g_random_int () & 0xff;
}
}
#endif
}
buffer = gst_buffer_make_metadata_writable (buffer);
GST_BUFFER_TIMESTAMP (buffer) =
gst_util_uint64_scale_int (GST_SECOND * intervideosrc->n_frames,
intervideosrc->fps_d, intervideosrc->fps_n);
GST_DEBUG_OBJECT (intervideosrc, "create ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
GST_BUFFER_DURATION (buffer) =
gst_util_uint64_scale_int (GST_SECOND * (intervideosrc->n_frames + 1),
intervideosrc->fps_d,
intervideosrc->fps_n) - GST_BUFFER_TIMESTAMP (buffer);
GST_BUFFER_OFFSET (buffer) = intervideosrc->n_frames;
GST_BUFFER_OFFSET_END (buffer) = -1;
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
if (intervideosrc->n_frames == 0) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
}
gst_buffer_set_caps (buffer, GST_PAD_CAPS (GST_BASE_SRC_PAD (intervideosrc)));
intervideosrc->n_frames++;
*buf = buffer;
return GST_FLOW_OK;
}
static gboolean
gst_inter_video_src_do_seek (GstBaseSrc * src, GstSegment * segment)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "do_seek");
return FALSE;
}
static gboolean
gst_inter_video_src_query (GstBaseSrc * src, GstQuery * query)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "query");
return TRUE;
}
static gboolean
gst_inter_video_src_check_get_range (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "get_range");
return FALSE;
}
static void
gst_inter_video_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GstStructure *structure;
GST_DEBUG_OBJECT (intervideosrc, "fixate");
structure = gst_caps_get_structure (caps, 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", 30, 1);
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
if (gst_structure_has_field (structure, "color-matrix"))
gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
}
static gboolean
gst_inter_video_src_unlock_stop (GstBaseSrc * src)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "stop");
return TRUE;
}
static gboolean
gst_inter_video_src_prepare_seek_segment (GstBaseSrc * src, GstEvent * seek,
GstSegment * segment)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GST_DEBUG_OBJECT (intervideosrc, "seek_segment");
return FALSE;
}