avcodec/libx264: fix "bitrate reconfiguration"
[ffmpeg.git] / ffmpeg_vdpau.c
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
54     AVFrame *tmp_frame;
55
56     enum AVPixelFormat pix_fmt;
57     VdpYCbCrFormat vdpau_format;
58 } VDPAUContext;
59
60 static void vdpau_uninit(AVCodecContext *s)
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);
81     av_freep(&s->hwaccel_context);
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
93 static int vdpau_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
94 {
95     InputStream         *ist = s->opaque;
96     VDPAUContext        *ctx = ist->hwaccel_ctx;
97     VdpVideoSurface *surface;
98     VdpStatus err;
99
100     av_assert0(frame->format == AV_PIX_FMT_VDPAU);
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),
107                                      vdpau_release_buffer, ctx,
108                                      AV_BUFFER_FLAG_READONLY);
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
131 static int vdpau_retrieve_data(AVCodecContext *s, AVFrame *frame)
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:
178     av_frame_unref(ctx->tmp_frame);
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
189 static int vdpau_alloc(AVCodecContext *s)
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;
204     ist->hwaccel_uninit        = vdpau_uninit;
205     ist->hwaccel_get_buffer    = vdpau_get_buffer;
206     ist->hwaccel_retrieve_data = vdpau_retrieve_data;
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
294 int vdpau_init(AVCodecContext *s)
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
331     ist->hwaccel_get_buffer    = vdpau_get_buffer;
332     ist->hwaccel_retrieve_data = vdpau_retrieve_data;
333
334     return 0;
335 }