FFmpeg  2.6.9
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ffmpeg_vda.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg 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.
8  *
9  * FFmpeg 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.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavcodec/avcodec.h"
20 #include "libavcodec/vda.h"
21 #include "libavutil/imgutils.h"
22 
23 #include "ffmpeg.h"
24 
25 typedef struct VDAContext {
27 } VDAContext;
28 
30 {
31  InputStream *ist = s->opaque;
32  VDAContext *vda = ist->hwaccel_ctx;
33  CVPixelBufferRef pixbuf = (CVPixelBufferRef)frame->data[3];
34  OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
35  CVReturn err;
36  uint8_t *data[4] = { 0 };
37  int linesize[4] = { 0 };
38  int planes, ret, i;
39 
41 
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;
45  default:
47  "Unsupported pixel format: %u\n", pixel_format);
48  return AVERROR(ENOSYS);
49  }
50 
51  vda->tmp_frame->width = frame->width;
52  vda->tmp_frame->height = frame->height;
53  ret = av_frame_get_buffer(vda->tmp_frame, 32);
54  if (ret < 0)
55  return ret;
56 
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;
61  }
62 
63  if (CVPixelBufferIsPlanar(pixbuf)) {
64 
65  planes = CVPixelBufferGetPlaneCount(pixbuf);
66  for (i = 0; i < planes; i++) {
67  data[i] = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
68  linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
69  }
70  } else {
71  data[0] = CVPixelBufferGetBaseAddress(pixbuf);
72  linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
73  }
74 
76  data, linesize, vda->tmp_frame->format,
77  frame->width, frame->height);
78 
79  ret = av_frame_copy_props(vda->tmp_frame, frame);
80  CVPixelBufferUnlockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
81 
82  if (ret < 0)
83  return ret;
84 
85  av_frame_unref(frame);
86  av_frame_move_ref(frame, vda->tmp_frame);
87 
88  return 0;
89 }
90 
92 {
93  InputStream *ist = s->opaque;
94  VDAContext *vda = ist->hwaccel_ctx;
95 
96  ist->hwaccel_uninit = NULL;
98 
99  av_frame_free(&vda->tmp_frame);
100 
102  av_freep(&ist->hwaccel_ctx);
103 }
104 
106 {
107  InputStream *ist = s->opaque;
108  int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
109  VDAContext *vda;
110  int ret;
111 
112  vda = av_mallocz(sizeof(*vda));
113  if (!vda)
114  return AVERROR(ENOMEM);
115 
116  ist->hwaccel_ctx = vda;
117  ist->hwaccel_uninit = vda_uninit;
119 
120  vda->tmp_frame = av_frame_alloc();
121  if (!vda->tmp_frame) {
122  ret = AVERROR(ENOMEM);
123  goto fail;
124  }
125 
126  ret = av_vda_default_init(s);
127  if (ret < 0) {
128  av_log(NULL, loglevel, "Error creating VDA decoder.\n");
129  goto fail;
130  }
131 
132  return 0;
133 fail:
134  vda_uninit(s);
135  return ret;
136 }