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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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324 lines
9 KiB
C
324 lines
9 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Matthew Waters <ystree00@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include "gl.h"
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#include "gstgldownload.h"
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/**
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* SECTION:gstgldownload
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* @short_description: an object that downloads GL textures
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* @see_also: #GstGLUpload, #GstGLMemory
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*
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* #GstGLDownload is an object that downloads GL textures into system memory.
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*
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* A #GstGLDownload can be created with gst_gl_download_new()
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*/
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#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
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#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
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#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
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#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
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#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
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static gboolean _do_download (GstGLDownload * download, guint texture_id,
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gpointer data[GST_VIDEO_MAX_PLANES]);
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static gboolean _init_download (GstGLDownload * download);
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static gboolean _gst_gl_download_perform_with_data_unlocked (GstGLDownload *
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download, GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES]);
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static void gst_gl_download_reset (GstGLDownload * download);
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/* *INDENT-ON* */
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struct _GstGLDownloadPrivate
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{
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const gchar *YUY2_UYVY;
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const gchar *I420_YV12;
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const gchar *AYUV;
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const gchar *ARGB;
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const gchar *vert_shader;
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GstGLMemory *in_tex[GST_VIDEO_MAX_PLANES];
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};
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GST_DEBUG_CATEGORY_STATIC (gst_gl_download_debug);
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#define GST_CAT_DEFAULT gst_gl_download_debug
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_download_debug, "gldownload", 0, "download");
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G_DEFINE_TYPE_WITH_CODE (GstGLDownload, gst_gl_download, GST_TYPE_OBJECT,
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DEBUG_INIT);
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static void gst_gl_download_finalize (GObject * object);
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#define GST_GL_DOWNLOAD_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
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GST_TYPE_GL_DOWNLOAD, GstGLDownloadPrivate))
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static void
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gst_gl_download_class_init (GstGLDownloadClass * klass)
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{
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g_type_class_add_private (klass, sizeof (GstGLDownloadPrivate));
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G_OBJECT_CLASS (klass)->finalize = gst_gl_download_finalize;
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}
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static void
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gst_gl_download_init (GstGLDownload * download)
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{
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download->priv = GST_GL_DOWNLOAD_GET_PRIVATE (download);
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gst_video_info_init (&download->info);
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}
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/**
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* gst_gl_download_new:
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* @context: a #GstGLContext
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*
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* Returns: a new #GstGLDownload object
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*/
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GstGLDownload *
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gst_gl_download_new (GstGLContext * context)
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{
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GstGLDownload *download;
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download = g_object_new (GST_TYPE_GL_DOWNLOAD, NULL);
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download->context = gst_object_ref (context);
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download->convert = gst_gl_color_convert_new (context);
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return download;
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}
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static void
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gst_gl_download_finalize (GObject * object)
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{
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GstGLDownload *download;
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download = GST_GL_DOWNLOAD (object);
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gst_gl_download_reset (download);
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if (download->convert) {
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gst_object_unref (download->convert);
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download->convert = NULL;
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}
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if (download->context) {
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gst_object_unref (download->context);
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download->context = NULL;
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}
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G_OBJECT_CLASS (gst_gl_download_parent_class)->finalize (object);
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}
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static void
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gst_gl_download_reset (GstGLDownload * download)
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{
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guint i;
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for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
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if (download->priv->in_tex[i]) {
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gst_memory_unref ((GstMemory *) download->priv->in_tex[i]);
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download->priv->in_tex[i] = NULL;
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}
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}
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}
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/**
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* gst_gl_download_set_format:
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* @download: a #GstGLDownload
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* @v_format: a #GstVideoFormat
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* @out_width: the width to download to
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* @out_height: the height to download to
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*
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* Initializes @download with the information required for download.
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*/
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void
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gst_gl_download_set_format (GstGLDownload * download, GstVideoInfo * out_info)
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{
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g_return_if_fail (download != NULL);
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g_return_if_fail (GST_VIDEO_INFO_FORMAT (out_info) !=
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GST_VIDEO_FORMAT_UNKNOWN);
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g_return_if_fail (GST_VIDEO_INFO_FORMAT (out_info) !=
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GST_VIDEO_FORMAT_ENCODED);
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GST_OBJECT_LOCK (download);
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if (gst_video_info_is_equal (&download->info, out_info)) {
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GST_OBJECT_UNLOCK (download);
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return;
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}
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gst_gl_download_reset (download);
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download->initted = FALSE;
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download->info = *out_info;
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GST_OBJECT_UNLOCK (download);
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}
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/**
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* gst_gl_download_perform_with_data:
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* @download: a #GstGLDownload
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* @texture_id: the texture id to download
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* @data: (out): where the downloaded data should go
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*
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* Downloads @texture_id into @data. @data size and format is specified by
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* the #GstVideoFormat passed to gst_gl_download_set_format()
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*
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* Returns: whether the download was successful
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*/
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gboolean
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gst_gl_download_perform_with_data (GstGLDownload * download, GLuint texture_id,
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gpointer data[GST_VIDEO_MAX_PLANES])
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{
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gboolean ret;
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g_return_val_if_fail (download != NULL, FALSE);
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GST_OBJECT_LOCK (download);
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ret =
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_gst_gl_download_perform_with_data_unlocked (download, texture_id, data);
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GST_OBJECT_UNLOCK (download);
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return ret;
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}
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static gboolean
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_gst_gl_download_perform_with_data_unlocked (GstGLDownload * download,
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GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES])
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{
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guint i;
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g_return_val_if_fail (download != NULL, FALSE);
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g_return_val_if_fail (texture_id > 0, FALSE);
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g_return_val_if_fail (GST_VIDEO_INFO_FORMAT (&download->info) !=
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GST_VIDEO_FORMAT_UNKNOWN
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&& GST_VIDEO_INFO_FORMAT (&download->info) != GST_VIDEO_FORMAT_ENCODED,
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FALSE);
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for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&download->info); i++) {
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g_return_val_if_fail (data[i] != NULL, FALSE);
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}
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if (!download->priv->in_tex[0]) {
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GstVideoInfo temp_info;
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gst_video_info_set_format (&temp_info, GST_VIDEO_FORMAT_RGBA,
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GST_VIDEO_INFO_WIDTH (&download->info),
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GST_VIDEO_INFO_HEIGHT (&download->info));
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download->priv->in_tex[0] =
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gst_gl_memory_wrapped_texture (download->context, texture_id,
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&temp_info, 0, NULL, NULL);
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}
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download->priv->in_tex[0]->tex_id = texture_id;
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return _do_download (download, texture_id, data);
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}
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static gboolean
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_init_download (GstGLDownload * download)
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{
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GstVideoFormat v_format;
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guint out_width, out_height;
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GstVideoInfo in_info;
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v_format = GST_VIDEO_INFO_FORMAT (&download->info);
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out_width = GST_VIDEO_INFO_WIDTH (&download->info);
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out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
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if (download->initted)
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return TRUE;
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GST_TRACE ("initializing texture download for format %s",
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gst_video_format_to_string (v_format));
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if (USING_GLES2 (download->context) && !USING_GLES3 (download->context)) {
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/* GL_RGBA is the only officially supported texture format in GLES2 */
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if (v_format == GST_VIDEO_FORMAT_RGB || v_format == GST_VIDEO_FORMAT_BGR) {
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gst_gl_context_set_error (download->context, "Cannot download RGB "
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"textures in GLES2");
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return FALSE;
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}
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}
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gst_video_info_set_format (&in_info, GST_VIDEO_FORMAT_RGBA, out_width,
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out_height);
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gst_gl_color_convert_set_format (download->convert, &in_info,
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&download->info);
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return TRUE;
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}
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static gboolean
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_do_download (GstGLDownload * download, guint texture_id,
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gpointer data[GST_VIDEO_MAX_PLANES])
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{
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guint out_width, out_height;
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GstBuffer *inbuf, *outbuf;
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GstMapInfo map_info;
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gboolean ret = TRUE;
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gint i;
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out_width = GST_VIDEO_INFO_WIDTH (&download->info);
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out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
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if (!download->initted) {
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if (!_init_download (download))
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return FALSE;
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}
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GST_TRACE ("doing download of texture:%u (%ux%u)",
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download->priv->in_tex[0]->tex_id, out_width, out_height);
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inbuf = gst_buffer_new ();
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gst_buffer_append_memory (inbuf,
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gst_memory_ref ((GstMemory *) download->priv->in_tex[0]));
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outbuf = gst_gl_color_convert_perform (download->convert, inbuf);
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if (!outbuf)
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return FALSE;
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for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&download->info); i++) {
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GstMemory *out_mem = gst_buffer_peek_memory (outbuf, i);
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gpointer temp_data = ((GstGLMemory *) out_mem)->data;
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((GstGLMemory *) out_mem)->data = data[i];
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if (!gst_memory_map (out_mem, &map_info, GST_MAP_READ)) {
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GST_ERROR_OBJECT (download, "Failed to map memory");
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ret = FALSE;
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}
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gst_memory_unmap (out_mem, &map_info);
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((GstGLMemory *) out_mem)->data = temp_data;
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}
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gst_buffer_unref (inbuf);
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gst_buffer_unref (outbuf);
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return ret;
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}
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