FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
ffmpeg_vdpau.c
Go to the documentation of this file.
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 <stdint.h>
20 
21 #include <vdpau/vdpau.h>
22 #include <vdpau/vdpau_x11.h>
23 
24 #include <X11/Xlib.h>
25 
26 #include "ffmpeg.h"
27 
28 #include "libavcodec/vdpau.h"
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/buffer.h"
32 #include "libavutil/frame.h"
33 #include "libavutil/pixfmt.h"
34 
35 typedef struct VDPAUContext {
36  Display *dpy;
37 
38  VdpDevice device;
39  VdpDecoder decoder;
40  VdpGetProcAddress *get_proc_address;
41 
42  VdpGetErrorString *get_error_string;
43  VdpGetInformationString *get_information_string;
44  VdpDeviceDestroy *device_destroy;
45  VdpDecoderCreate *decoder_create;
46  VdpDecoderDestroy *decoder_destroy;
47  VdpDecoderRender *decoder_render;
48  VdpVideoSurfaceCreate *video_surface_create;
49  VdpVideoSurfaceDestroy *video_surface_destroy;
50  VdpVideoSurfaceGetBitsYCbCr *video_surface_get_bits;
51  VdpVideoSurfaceGetParameters *video_surface_get_parameters;
52  VdpVideoSurfaceQueryGetPutBitsYCbCrCapabilities *video_surface_query;
53 
55 
57  VdpYCbCrFormat vdpau_format;
58 } VDPAUContext;
59 
61 {
62  InputStream *ist = s->opaque;
63  VDPAUContext *ctx = ist->hwaccel_ctx;
64 
65  ist->hwaccel_uninit = NULL;
66  ist->hwaccel_get_buffer = NULL;
67  ist->hwaccel_retrieve_data = NULL;
68 
69  if (ctx->decoder_destroy)
70  ctx->decoder_destroy(ctx->decoder);
71 
72  if (ctx->device_destroy)
73  ctx->device_destroy(ctx->device);
74 
75  if (ctx->dpy)
76  XCloseDisplay(ctx->dpy);
77 
78  av_frame_free(&ctx->tmp_frame);
79 
80  av_freep(&ist->hwaccel_ctx);
82 }
83 
84 static void vdpau_release_buffer(void *opaque, uint8_t *data)
85 {
86  VdpVideoSurface surface = *(VdpVideoSurface*)data;
87  VDPAUContext *ctx = opaque;
88 
89  ctx->video_surface_destroy(surface);
90  av_freep(&data);
91 }
92 
94 {
95  InputStream *ist = s->opaque;
96  VDPAUContext *ctx = ist->hwaccel_ctx;
97  VdpVideoSurface *surface;
98  VdpStatus err;
99 
101 
102  surface = av_malloc(sizeof(*surface));
103  if (!surface)
104  return AVERROR(ENOMEM);
105 
106  frame->buf[0] = av_buffer_create((uint8_t*)surface, sizeof(*surface),
109  if (!frame->buf[0]) {
110  av_freep(&surface);
111  return AVERROR(ENOMEM);
112  }
113 
114  // properly we should keep a pool of surfaces instead of creating
115  // them anew for each frame, but since we don't care about speed
116  // much in this code, we don't bother
117  err = ctx->video_surface_create(ctx->device, VDP_CHROMA_TYPE_420,
118  frame->width, frame->height, surface);
119  if (err != VDP_STATUS_OK) {
120  av_log(NULL, AV_LOG_ERROR, "Error allocating a VDPAU video surface: %s\n",
121  ctx->get_error_string(err));
122  av_buffer_unref(&frame->buf[0]);
123  return AVERROR_UNKNOWN;
124  }
125 
126  frame->data[3] = (uint8_t*)(uintptr_t)*surface;
127 
128  return 0;
129 }
130 
132 {
133  VdpVideoSurface surface = (VdpVideoSurface)(uintptr_t)frame->data[3];
134  InputStream *ist = s->opaque;
135  VDPAUContext *ctx = ist->hwaccel_ctx;
136  VdpStatus err;
137  int ret, chroma_type;
138 
139  err = ctx->video_surface_get_parameters(surface, &chroma_type,
140  &ctx->tmp_frame->width,
141  &ctx->tmp_frame->height);
142  if (err != VDP_STATUS_OK) {
143  av_log(NULL, AV_LOG_ERROR, "Error getting surface parameters: %s\n",
144  ctx->get_error_string(err));
145  return AVERROR_UNKNOWN;
146  }
147  ctx->tmp_frame->format = ctx->pix_fmt;
148 
149  ret = av_frame_get_buffer(ctx->tmp_frame, 32);
150  if (ret < 0)
151  return ret;
152 
153  ctx->tmp_frame->width = frame->width;
154  ctx->tmp_frame->height = frame->height;
155 
156  err = ctx->video_surface_get_bits(surface, ctx->vdpau_format,
157  (void * const *)ctx->tmp_frame->data,
158  ctx->tmp_frame->linesize);
159  if (err != VDP_STATUS_OK) {
160  av_log(NULL, AV_LOG_ERROR, "Error retrieving frame data from VDPAU: %s\n",
161  ctx->get_error_string(err));
162  ret = AVERROR_UNKNOWN;
163  goto fail;
164  }
165 
166  if (ctx->vdpau_format == VDP_YCBCR_FORMAT_YV12)
167  FFSWAP(uint8_t*, ctx->tmp_frame->data[1], ctx->tmp_frame->data[2]);
168 
169  ret = av_frame_copy_props(ctx->tmp_frame, frame);
170  if (ret < 0)
171  goto fail;
172 
173  av_frame_unref(frame);
174  av_frame_move_ref(frame, ctx->tmp_frame);
175  return 0;
176 
177 fail:
179  return ret;
180 }
181 
182 static const int vdpau_formats[][2] = {
183  { VDP_YCBCR_FORMAT_YV12, AV_PIX_FMT_YUV420P },
184  { VDP_YCBCR_FORMAT_NV12, AV_PIX_FMT_NV12 },
185  { VDP_YCBCR_FORMAT_YUYV, AV_PIX_FMT_YUYV422 },
186  { VDP_YCBCR_FORMAT_UYVY, AV_PIX_FMT_UYVY422 },
187 };
188 
190 {
191  InputStream *ist = s->opaque;
192  int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
193  AVVDPAUContext *vdpau_ctx;
194  VDPAUContext *ctx;
195  const char *display, *vendor;
196  VdpStatus err;
197  int i;
198 
199  ctx = av_mallocz(sizeof(*ctx));
200  if (!ctx)
201  return AVERROR(ENOMEM);
202 
203  ist->hwaccel_ctx = ctx;
207 
208  ctx->tmp_frame = av_frame_alloc();
209  if (!ctx->tmp_frame)
210  goto fail;
211 
212  ctx->dpy = XOpenDisplay(ist->hwaccel_device);
213  if (!ctx->dpy) {
214  av_log(NULL, loglevel, "Cannot open the X11 display %s.\n",
215  XDisplayName(ist->hwaccel_device));
216  goto fail;
217  }
218  display = XDisplayString(ctx->dpy);
219 
220  err = vdp_device_create_x11(ctx->dpy, XDefaultScreen(ctx->dpy), &ctx->device,
221  &ctx->get_proc_address);
222  if (err != VDP_STATUS_OK) {
223  av_log(NULL, loglevel, "VDPAU device creation on X11 display %s failed.\n",
224  display);
225  goto fail;
226  }
227 
228 #define GET_CALLBACK(id, result) \
229 do { \
230  void *tmp; \
231  err = ctx->get_proc_address(ctx->device, id, &tmp); \
232  if (err != VDP_STATUS_OK) { \
233  av_log(NULL, loglevel, "Error getting the " #id " callback.\n"); \
234  goto fail; \
235  } \
236  ctx->result = tmp; \
237 } while (0)
238 
239  GET_CALLBACK(VDP_FUNC_ID_GET_ERROR_STRING, get_error_string);
240  GET_CALLBACK(VDP_FUNC_ID_GET_INFORMATION_STRING, get_information_string);
241  GET_CALLBACK(VDP_FUNC_ID_DEVICE_DESTROY, device_destroy);
242  GET_CALLBACK(VDP_FUNC_ID_DECODER_CREATE, decoder_create);
243  GET_CALLBACK(VDP_FUNC_ID_DECODER_DESTROY, decoder_destroy);
244  GET_CALLBACK(VDP_FUNC_ID_DECODER_RENDER, decoder_render);
245  GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_CREATE, video_surface_create);
246  GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_DESTROY, video_surface_destroy);
247  GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_GET_BITS_Y_CB_CR, video_surface_get_bits);
248  GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_GET_PARAMETERS, video_surface_get_parameters);
249  GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_QUERY_GET_PUT_BITS_Y_CB_CR_CAPABILITIES,
250  video_surface_query);
251 
252  for (i = 0; i < FF_ARRAY_ELEMS(vdpau_formats); i++) {
253  VdpBool supported;
254  err = ctx->video_surface_query(ctx->device, VDP_CHROMA_TYPE_420,
255  vdpau_formats[i][0], &supported);
256  if (err != VDP_STATUS_OK) {
257  av_log(NULL, loglevel,
258  "Error querying VDPAU surface capabilities: %s\n",
259  ctx->get_error_string(err));
260  goto fail;
261  }
262  if (supported)
263  break;
264  }
265  if (i == FF_ARRAY_ELEMS(vdpau_formats)) {
266  av_log(NULL, loglevel,
267  "No supported VDPAU format for retrieving the data.\n");
268  return AVERROR(EINVAL);
269  }
270  ctx->vdpau_format = vdpau_formats[i][0];
271  ctx->pix_fmt = vdpau_formats[i][1];
272 
273  vdpau_ctx = av_vdpau_alloc_context();
274  if (!vdpau_ctx)
275  goto fail;
276  vdpau_ctx->render = ctx->decoder_render;
277 
278  s->hwaccel_context = vdpau_ctx;
279 
280  ctx->get_information_string(&vendor);
281  av_log(NULL, AV_LOG_VERBOSE, "Using VDPAU -- %s -- on X11 display %s, "
282  "to decode input stream #%d:%d.\n", vendor,
283  display, ist->file_index, ist->st->index);
284 
285  return 0;
286 
287 fail:
288  av_log(NULL, loglevel, "VDPAU init failed for stream #%d:%d.\n",
289  ist->file_index, ist->st->index);
290  vdpau_uninit(s);
291  return AVERROR(EINVAL);
292 }
293 
295 {
296  InputStream *ist = s->opaque;
297  int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
298  AVVDPAUContext *vdpau_ctx;
299  VDPAUContext *ctx;
300  VdpStatus err;
301  int profile, ret;
302 
303  if (!ist->hwaccel_ctx) {
304  ret = vdpau_alloc(s);
305  if (ret < 0)
306  return ret;
307  }
308  ctx = ist->hwaccel_ctx;
309  vdpau_ctx = s->hwaccel_context;
310 
311  ret = av_vdpau_get_profile(s, &profile);
312  if (ret < 0) {
313  av_log(NULL, loglevel, "No known VDPAU decoder profile for this stream.\n");
314  return AVERROR(EINVAL);
315  }
316 
317  if (ctx->decoder)
318  ctx->decoder_destroy(ctx->decoder);
319 
320  err = ctx->decoder_create(ctx->device, profile,
321  s->coded_width, s->coded_height,
322  16, &ctx->decoder);
323  if (err != VDP_STATUS_OK) {
324  av_log(NULL, loglevel, "Error creating the VDPAU decoder: %s\n",
325  ctx->get_error_string(err));
326  return AVERROR_UNKNOWN;
327  }
328 
329  vdpau_ctx->decoder = ctx->decoder;
330 
333 
334  return 0;
335 }