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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 <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 }