2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavcodec/avcodec.h"
20 #include "libavcodec/vda.h"
21 #include "libavutil/imgutils.h"
25 typedef struct VDAContext {
29 static int vda_retrieve_data(AVCodecContext *s, AVFrame *frame)
31 InputStream *ist = s->opaque;
32 VDAContext *vda = ist->hwaccel_ctx;
33 CVPixelBufferRef pixbuf = (CVPixelBufferRef)frame->data[3];
34 OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
36 uint8_t *data[4] = { 0 };
37 int linesize[4] = { 0 };
40 av_frame_unref(vda->tmp_frame);
42 switch (pixel_format) {
43 case kCVPixelFormatType_420YpCbCr8Planar: vda->tmp_frame->format = AV_PIX_FMT_YUV420P; break;
44 case kCVPixelFormatType_422YpCbCr8: vda->tmp_frame->format = AV_PIX_FMT_UYVY422; break;
46 av_log(NULL, AV_LOG_ERROR,
47 "Unsupported pixel format: %u\n", pixel_format);
48 return AVERROR(ENOSYS);
51 vda->tmp_frame->width = frame->width;
52 vda->tmp_frame->height = frame->height;
53 ret = av_frame_get_buffer(vda->tmp_frame, 32);
57 err = CVPixelBufferLockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
58 if (err != kCVReturnSuccess) {
59 av_log(NULL, AV_LOG_ERROR, "Error locking the pixel buffer.\n");
60 return AVERROR_UNKNOWN;
63 if (CVPixelBufferIsPlanar(pixbuf)) {
65 planes = CVPixelBufferGetPlaneCount(pixbuf);
66 for (i = 0; i < planes; i++) {
67 data[i] = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
68 linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
71 data[0] = CVPixelBufferGetBaseAddress(pixbuf);
72 linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
75 av_image_copy(vda->tmp_frame->data, vda->tmp_frame->linesize,
76 data, linesize, vda->tmp_frame->format,
77 frame->width, frame->height);
79 ret = av_frame_copy_props(vda->tmp_frame, frame);
83 av_frame_unref(frame);
84 av_frame_move_ref(frame, vda->tmp_frame);
89 static void vda_uninit(AVCodecContext *s)
91 InputStream *ist = s->opaque;
92 VDAContext *vda = ist->hwaccel_ctx;
94 ist->hwaccel_uninit = NULL;
95 ist->hwaccel_retrieve_data = NULL;
97 av_frame_free(&vda->tmp_frame);
99 av_vda_default_free(s);
100 av_freep(&ist->hwaccel_ctx);
103 int vda_init(AVCodecContext *s)
105 InputStream *ist = s->opaque;
106 int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
110 vda = av_mallocz(sizeof(*vda));
112 return AVERROR(ENOMEM);
114 ist->hwaccel_ctx = vda;
115 ist->hwaccel_uninit = vda_uninit;
116 ist->hwaccel_retrieve_data = vda_retrieve_data;
118 vda->tmp_frame = av_frame_alloc();
119 if (!vda->tmp_frame) {
120 ret = AVERROR(ENOMEM);
124 ret = av_vda_default_init(s);
126 av_log(NULL, loglevel, "Error creating VDA decoder.\n");