| /* |
| * Copyright (C) 2009 Ole André Vadla Ravnås <oleavr@soundrop.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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "coremediabuffer.h" |
| |
| static void |
| gst_core_media_meta_free (GstCoreMediaMeta * meta, GstBuffer * buf) |
| { |
| if (meta->image_buf != NULL) { |
| CVPixelBufferUnlockBaseAddress (meta->image_buf, |
| kCVPixelBufferLock_ReadOnly); |
| CVBufferRelease(meta->image_buf); |
| } |
| if (meta->block_buf != NULL) { |
| CFRelease (meta->block_buf); |
| } |
| CVBufferRelease ((CVBufferRef)meta->sample_buf); |
| } |
| |
| GType |
| gst_core_media_meta_api_get_type (void) |
| { |
| static volatile GType type; |
| static const gchar *tags[] = { "memory", NULL }; |
| |
| if (g_once_init_enter (&type)) { |
| GType _type = gst_meta_api_type_register ("GstCoreMediaMetaAPI", tags); |
| g_once_init_leave (&type, _type); |
| } |
| return type; |
| } |
| |
| static const GstMetaInfo * |
| gst_core_media_meta_get_info (void) |
| { |
| static const GstMetaInfo *core_media_meta_info = NULL; |
| |
| if (g_once_init_enter (&core_media_meta_info)) { |
| const GstMetaInfo *meta = gst_meta_register (GST_CORE_MEDIA_META_API_TYPE, |
| "GstCoreMediaMeta", sizeof (GstCoreMediaMeta), |
| (GstMetaInitFunction) NULL, |
| (GstMetaFreeFunction) gst_core_media_meta_free, |
| (GstMetaTransformFunction) NULL); |
| g_once_init_leave (&core_media_meta_info, meta); |
| } |
| return core_media_meta_info; |
| } |
| |
| GstBuffer * |
| gst_core_media_buffer_new (CMSampleBufferRef sample_buf) |
| { |
| CVImageBufferRef image_buf; |
| CVPixelBufferRef pixel_buf; |
| CMBlockBufferRef block_buf; |
| gchar *data = NULL; |
| UInt32 size; |
| OSStatus status; |
| GstBuffer *buf; |
| GstCoreMediaMeta *meta; |
| |
| image_buf = CMSampleBufferGetImageBuffer (sample_buf); |
| pixel_buf = NULL; |
| block_buf = CMSampleBufferGetDataBuffer (sample_buf); |
| |
| if (image_buf != NULL && |
| CFGetTypeID (image_buf) == CVPixelBufferGetTypeID ()) { |
| pixel_buf = (CVPixelBufferRef) image_buf; |
| |
| if (CVPixelBufferLockBaseAddress (pixel_buf, |
| kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) { |
| goto error; |
| } |
| |
| if (CVPixelBufferIsPlanar (pixel_buf)) { |
| gint plane_count, plane_idx; |
| |
| data = CVPixelBufferGetBaseAddressOfPlane (pixel_buf, 0); |
| |
| size = 0; |
| plane_count = CVPixelBufferGetPlaneCount (pixel_buf); |
| for (plane_idx = 0; plane_idx != plane_count; plane_idx++) { |
| size += CVPixelBufferGetBytesPerRowOfPlane (pixel_buf, plane_idx) * |
| CVPixelBufferGetHeightOfPlane (pixel_buf, plane_idx); |
| } |
| } else { |
| data = CVPixelBufferGetBaseAddress (pixel_buf); |
| size = CVPixelBufferGetBytesPerRow (pixel_buf) * |
| CVPixelBufferGetHeight (pixel_buf); |
| } |
| } else if (block_buf != NULL) { |
| status = CMBlockBufferGetDataPointer (block_buf, 0, 0, 0, &data); |
| if (status != noErr) |
| goto error; |
| size = CMBlockBufferGetDataLength (block_buf); |
| } else { |
| goto error; |
| } |
| |
| buf = gst_buffer_new (); |
| |
| meta = (GstCoreMediaMeta *) gst_buffer_add_meta (buf, |
| gst_core_media_meta_get_info (), NULL); |
| CVBufferRetain ((CVBufferRef)sample_buf); |
| meta->sample_buf = sample_buf; |
| meta->image_buf = image_buf; |
| meta->pixel_buf = pixel_buf; |
| meta->block_buf = block_buf; |
| |
| gst_buffer_append_memory (buf, |
| gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data, |
| size, 0, size, NULL, NULL)); |
| |
| return buf; |
| |
| error: |
| return NULL; |
| } |
| |
| CVPixelBufferRef |
| gst_core_media_buffer_get_pixel_buffer (GstBuffer * buf) |
| { |
| GstCoreMediaMeta *meta = (GstCoreMediaMeta *) gst_buffer_get_meta (buf, |
| GST_CORE_MEDIA_META_API_TYPE); |
| g_return_val_if_fail (meta != NULL, NULL); |
| |
| return CVPixelBufferRetain (meta->pixel_buf); |
| } |