mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/*
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* Copyright (C) 2009 Ole André Vadla Ravnås <oleavr@soundrop.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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#include "coremediabuffer.h"
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static void
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gst_core_media_meta_free (GstCoreMediaMeta * meta, GstBuffer * buf)
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{
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if (meta->image_buf != NULL) {
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CVPixelBufferUnlockBaseAddress (meta->image_buf,
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kCVPixelBufferLock_ReadOnly);
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CVBufferRelease (meta->image_buf);
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}
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if (meta->block_buf != NULL) {
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CFRelease (meta->block_buf);
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}
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CFRelease (meta->sample_buf);
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}
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GType
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gst_core_media_meta_api_get_type (void)
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{
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static volatile GType type;
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static const gchar *tags[] = { "memory", NULL };
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstCoreMediaMetaAPI", tags);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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static const GstMetaInfo *
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gst_core_media_meta_get_info (void)
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{
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static const GstMetaInfo *core_media_meta_info = NULL;
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if (g_once_init_enter (&core_media_meta_info)) {
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const GstMetaInfo *meta = gst_meta_register (GST_CORE_MEDIA_META_API_TYPE,
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"GstCoreMediaMeta", sizeof (GstCoreMediaMeta),
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(GstMetaInitFunction) NULL,
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(GstMetaFreeFunction) gst_core_media_meta_free,
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(GstMetaTransformFunction) NULL);
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g_once_init_leave (&core_media_meta_info, meta);
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}
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return core_media_meta_info;
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}
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GstBuffer *
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gst_core_media_buffer_new (CMSampleBufferRef sample_buf)
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{
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CVImageBufferRef image_buf;
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CVPixelBufferRef pixel_buf;
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CMBlockBufferRef block_buf;
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gchar *data = NULL;
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UInt32 size;
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OSStatus status;
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GstBuffer *buf;
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GstCoreMediaMeta *meta;
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image_buf = CMSampleBufferGetImageBuffer (sample_buf);
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pixel_buf = NULL;
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block_buf = CMSampleBufferGetDataBuffer (sample_buf);
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if (image_buf != NULL && CFGetTypeID (image_buf) == CVPixelBufferGetTypeID ()) {
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pixel_buf = (CVPixelBufferRef) image_buf;
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if (CVPixelBufferLockBaseAddress (pixel_buf,
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kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
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goto error;
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}
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if (CVPixelBufferIsPlanar (pixel_buf)) {
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gint plane_count, plane_idx;
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data = CVPixelBufferGetBaseAddressOfPlane (pixel_buf, 0);
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size = 0;
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plane_count = CVPixelBufferGetPlaneCount (pixel_buf);
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for (plane_idx = 0; plane_idx != plane_count; plane_idx++) {
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size += CVPixelBufferGetBytesPerRowOfPlane (pixel_buf, plane_idx) *
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CVPixelBufferGetHeightOfPlane (pixel_buf, plane_idx);
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}
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} else {
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data = CVPixelBufferGetBaseAddress (pixel_buf);
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size = CVPixelBufferGetBytesPerRow (pixel_buf) *
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CVPixelBufferGetHeight (pixel_buf);
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}
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} else if (block_buf != NULL) {
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status = CMBlockBufferGetDataPointer (block_buf, 0, 0, 0, &data);
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if (status != noErr)
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goto error;
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size = CMBlockBufferGetDataLength (block_buf);
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} else {
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goto error;
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}
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buf = gst_buffer_new ();
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meta = (GstCoreMediaMeta *) gst_buffer_add_meta (buf,
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gst_core_media_meta_get_info (), NULL);
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CFRetain (sample_buf);
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if (image_buf)
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CVBufferRetain (image_buf);
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if (block_buf)
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CFRetain (block_buf);
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meta->sample_buf = sample_buf;
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meta->image_buf = image_buf;
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meta->pixel_buf = pixel_buf;
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meta->block_buf = block_buf;
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gst_buffer_append_memory (buf,
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gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data,
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size, 0, size, NULL, NULL));
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return buf;
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error:
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return NULL;
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}
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CVPixelBufferRef
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gst_core_media_buffer_get_pixel_buffer (GstBuffer * buf)
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{
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GstCoreMediaMeta *meta = (GstCoreMediaMeta *) gst_buffer_get_meta (buf,
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GST_CORE_MEDIA_META_API_TYPE);
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g_return_val_if_fail (meta != NULL, NULL);
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return CVPixelBufferRetain (meta->pixel_buf);
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}
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