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/*
* Copyright (C) 2012 Igalia S.L
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#if USE(GSTREAMER)
#include "GStreamerUtilities.h"
#include "IntSize.h"
#include <gst/audio/audio.h>
#include <gst/gst.h>
#include <wtf/MathExtras.h>
#include <wtf/gobject/GUniquePtr.h>
namespace WebCore {
const char* webkitGstMapInfoQuarkString = "webkit-gst-map-info";
GstPad* webkitGstGhostPadFromStaticTemplate(GstStaticPadTemplate* staticPadTemplate, const gchar* name, GstPad* target)
{
GstPad* pad;
GstPadTemplate* padTemplate = gst_static_pad_template_get(staticPadTemplate);
if (target)
pad = gst_ghost_pad_new_from_template(name, target, padTemplate);
else
pad = gst_ghost_pad_new_no_target_from_template(name, padTemplate);
gst_object_unref(padTemplate);
return pad;
}
#if ENABLE(VIDEO)
bool getVideoSizeAndFormatFromCaps(GstCaps* caps, WebCore::IntSize& size, GstVideoFormat& format, int& pixelAspectRatioNumerator, int& pixelAspectRatioDenominator, int& stride)
{
GstVideoInfo info;
gst_video_info_init(&info);
if (!gst_video_info_from_caps(&info, caps))
return false;
format = GST_VIDEO_INFO_FORMAT(&info);
size.setWidth(GST_VIDEO_INFO_WIDTH(&info));
size.setHeight(GST_VIDEO_INFO_HEIGHT(&info));
pixelAspectRatioNumerator = GST_VIDEO_INFO_PAR_N(&info);
pixelAspectRatioDenominator = GST_VIDEO_INFO_PAR_D(&info);
stride = GST_VIDEO_INFO_PLANE_STRIDE(&info, 0);
return true;
}
#endif
GstBuffer* createGstBuffer(GstBuffer* buffer)
{
gsize bufferSize = gst_buffer_get_size(buffer);
GstBuffer* newBuffer = gst_buffer_new_and_alloc(bufferSize);
if (!newBuffer)
return 0;
gst_buffer_copy_into(newBuffer, buffer, static_cast<GstBufferCopyFlags>(GST_BUFFER_COPY_METADATA), 0, bufferSize);
return newBuffer;
}
GstBuffer* createGstBufferForData(const char* data, int length)
{
GstBuffer* buffer = gst_buffer_new_and_alloc(length);
gst_buffer_fill(buffer, 0, data, length);
return buffer;
}
char* getGstBufferDataPointer(GstBuffer* buffer)
{
GstMiniObject* miniObject = reinterpret_cast<GstMiniObject*>(buffer);
GstMapInfo* mapInfo = static_cast<GstMapInfo*>(gst_mini_object_get_qdata(miniObject, g_quark_from_static_string(webkitGstMapInfoQuarkString)));
return reinterpret_cast<char*>(mapInfo->data);
}
void mapGstBuffer(GstBuffer* buffer)
{
GstMapInfo* mapInfo = g_slice_new(GstMapInfo);
if (!gst_buffer_map(buffer, mapInfo, GST_MAP_WRITE)) {
g_slice_free(GstMapInfo, mapInfo);
gst_buffer_unref(buffer);
return;
}
GstMiniObject* miniObject = reinterpret_cast<GstMiniObject*>(buffer);
gst_mini_object_set_qdata(miniObject, g_quark_from_static_string(webkitGstMapInfoQuarkString), mapInfo, 0);
}
void unmapGstBuffer(GstBuffer* buffer)
{
GstMiniObject* miniObject = reinterpret_cast<GstMiniObject*>(buffer);
GstMapInfo* mapInfo = static_cast<GstMapInfo*>(gst_mini_object_steal_qdata(miniObject, g_quark_from_static_string(webkitGstMapInfoQuarkString)));
if (!mapInfo)
return;
gst_buffer_unmap(buffer, mapInfo);
g_slice_free(GstMapInfo, mapInfo);
}
bool initializeGStreamer()
{
#if GST_CHECK_VERSION(0, 10, 31)
if (gst_is_initialized())
return true;
#endif
GUniqueOutPtr<GError> error;
// FIXME: We should probably pass the arguments from the command line.
bool gstInitialized = gst_init_check(0, 0, &error.outPtr());
ASSERT_WITH_MESSAGE(gstInitialized, "GStreamer initialization failed: %s", error ? error->message : "unknown error occurred");
return gstInitialized;
}
unsigned getGstPlayFlag(const char* nick)
{
static GFlagsClass* flagsClass = static_cast<GFlagsClass*>(g_type_class_ref(g_type_from_name("GstPlayFlags")));
ASSERT(flagsClass);
GFlagsValue* flag = g_flags_get_value_by_nick(flagsClass, nick);
if (!flag)
return 0;
return flag->value;
}
GstClockTime toGstClockTime(float time)
{
// Extract the integer part of the time (seconds) and the fractional part (microseconds). Attempt to
// round the microseconds so no floating point precision is lost and we can perform an accurate seek.
float seconds;
float microSeconds = modff(time, &seconds) * 1000000;
GTimeVal timeValue;
timeValue.tv_sec = static_cast<glong>(seconds);
timeValue.tv_usec = static_cast<glong>(roundf(microSeconds / 10000) * 10000);
return GST_TIMEVAL_TO_TIME(timeValue);
}
}
#endif // USE(GSTREAMER)
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