libmpcodecs/vd_ffmpeg.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer 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
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <assert.h>
  22 #include <time.h>
  23 #include <stdbool.h>
  24
  25 #include <libavutil/common.h>
  26 #include <libavutil/opt.h>
  27 #include <libavutil/intreadwrite.h>
  28
  29 #include "talloc.h"
  30 #include "config.h"
  31 #include "mp_msg.h"
  32 #include "options.h"
  33 #include "av_opts.h"
  34
  35 #include "mpbswap.h"
  36 #include "fmt-conversion.h"
  37
  38 #include "vd.h"
  39 #include "img_format.h"
  40 #include "libmpdemux/stheader.h"
  41 #include "libmpdemux/demux_packet.h"
  42 #include "codec-cfg.h"
  43 #include "osdep/numcores.h"
  44 #include "libvo/csputils.h"
  45
  46 static const vd_info_t info = {
  47     "libavcodec video codecs",
  48     "ffmpeg",
  49     "",
  50     "",
  51     "native codecs",
  52     .print_name = "libavcodec",
  53 };
  54
  55 #include "libavcodec/avcodec.h"
  56
  57 #if AVPALETTE_SIZE > 1024
  58 #error palette too large, adapt libmpcodecs/vf.c:vf_get_image
  59 #endif
  60
  61 typedef struct {
  62     AVCodecContext *avctx;
  63     AVFrame *pic;
  64     enum PixelFormat pix_fmt;
  65     int do_slices;
  66     int do_dr1;
  67     int vo_initialized;
  68     int best_csp;
  69     int qp_stat[32];
  70     double qp_sum;
  71     double inv_qp_sum;
  72     int ip_count;
  73     int b_count;
  74     AVRational last_sample_aspect_ratio;
  75     enum AVDiscard skip_frame;
  76 } vd_ffmpeg_ctx;
  77
  78 #include "m_option.h"
  79
  80 static int get_buffer(AVCodecContext *avctx, AVFrame *pic);
  81 static void release_buffer(AVCodecContext *avctx, AVFrame *pic);
  82 static void draw_slice(struct AVCodecContext *s, const AVFrame *src,
  83                        int offset[4], int y, int type, int height);
  84
  85 static enum PixelFormat get_format(struct AVCodecContext *avctx,
  86                                    const enum PixelFormat *pix_fmt);
  87 static void uninit(struct sh_video *sh);
  88
  89 const m_option_t lavc_decode_opts_conf[] = {
  90     OPT_INTRANGE("bug", lavc_param.workaround_bugs, 0, -1, 999999),
  91     OPT_FLAG_ON("gray", lavc_param.gray, 0),
  92     OPT_INTRANGE("idct", lavc_param.idct_algo, 0, 0, 99),
  93     OPT_INTRANGE("ec", lavc_param.error_concealment, 0, 0, 99),
  94     OPT_FLAG_ON("vstats", lavc_param.vstats, 0),
  95     OPT_INTRANGE("debug", lavc_param.debug, 0, 0, 9999999),
  96     OPT_INTRANGE("vismv", lavc_param.vismv, 0, 0, 9999999),
  97     OPT_INTRANGE("st", lavc_param.skip_top, 0, 0, 999),
  98     OPT_INTRANGE("sb", lavc_param.skip_bottom, 0, 0, 999),
  99     OPT_FLAG_CONSTANTS("fast", lavc_param.fast, 0, 0, CODEC_FLAG2_FAST),
 100     OPT_STRING("lowres", lavc_param.lowres_str, 0),
 101     OPT_STRING("skiploopfilter", lavc_param.skip_loop_filter_str, 0),
 102     OPT_STRING("skipidct", lavc_param.skip_idct_str, 0),
 103     OPT_STRING("skipframe", lavc_param.skip_frame_str, 0),
 104     OPT_INTRANGE("threads", lavc_param.threads, 0, 0, 16),
 105     OPT_FLAG_CONSTANTS("bitexact", lavc_param.bitexact, 0, 0, CODEC_FLAG_BITEXACT),
 106     OPT_STRING("o", lavc_param.avopt, 0),
 107     {NULL, NULL, 0, 0, 0, 0, NULL}
 108 };
 109
 110 static enum AVDiscard str2AVDiscard(char *str)
 111 {
 112     if (!str)                               return AVDISCARD_DEFAULT;
 113     if (strcasecmp(str, "none"   ) == 0)    return AVDISCARD_NONE;
 114     if (strcasecmp(str, "default") == 0)    return AVDISCARD_DEFAULT;
 115     if (strcasecmp(str, "nonref" ) == 0)    return AVDISCARD_NONREF;
 116     if (strcasecmp(str, "bidir"  ) == 0)    return AVDISCARD_BIDIR;
 117     if (strcasecmp(str, "nonkey" ) == 0)    return AVDISCARD_NONKEY;
 118     if (strcasecmp(str, "all"    ) == 0)    return AVDISCARD_ALL;
 119     mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Unknown discard value %s\n", str);
 120     return AVDISCARD_DEFAULT;
 121 }
 122
 123 static int init(sh_video_t *sh)
 124 {
 125     struct lavc_param *lavc_param = &sh->opts->lavc_param;
 126     AVCodecContext *avctx;
 127     vd_ffmpeg_ctx *ctx;
 128     AVCodec *lavc_codec;
 129     int do_vis_debug = lavc_param->vismv ||
 130             (lavc_param->debug & (FF_DEBUG_VIS_MB_TYPE | FF_DEBUG_VIS_QP));
 131
 132     ctx = sh->context = talloc_zero(NULL, vd_ffmpeg_ctx);
 133
 134     if (sh->codec->dll) {
 135         lavc_codec = avcodec_find_decoder_by_name(sh->codec->dll);
 136         if (!lavc_codec) {
 137             mp_tmsg(MSGT_DECVIDEO, MSGL_ERR,
 138                     "Cannot find codec '%s' in libavcodec...\n",
 139                     sh->codec->dll);
 140             uninit(sh);
 141             return 0;
 142         }
 143     } else if (!sh->libav_codec_id) {
 144         mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "No Libav codec ID known. "
 145                 "Generic lavc decoder is not applicable.\n");
 146         return 0;
 147     } else {
 148         lavc_codec = avcodec_find_decoder(sh->libav_codec_id);
 149         if (!lavc_codec) {
 150             mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "Libavcodec has no decoder "
 151                    "for this codec\n");
 152             return 0;
 153         }
 154     }
 155
 156     sh->codecname = lavc_codec->long_name;
 157     if (!sh->codecname)
 158         sh->codecname = lavc_codec->name;
 159
 160     if (sh->opts->vd_use_slices
 161             && (lavc_codec->capabilities & CODEC_CAP_DRAW_HORIZ_BAND)
 162             && !do_vis_debug)
 163         ctx->do_slices = 1;
 164
 165     if (lavc_codec->capabilities & CODEC_CAP_DR1 && !do_vis_debug
 166             && lavc_codec->id != CODEC_ID_H264
 167             && lavc_codec->id != CODEC_ID_INTERPLAY_VIDEO
 168             && lavc_codec->id != CODEC_ID_ROQ && lavc_codec->id != CODEC_ID_VP8
 169             && lavc_codec->id != CODEC_ID_LAGARITH)
 170         ctx->do_dr1 = 1;
 171     ctx->ip_count = ctx->b_count = 0;
 172
 173     ctx->pic = avcodec_alloc_frame();
 174     ctx->avctx = avcodec_alloc_context3(lavc_codec);
 175     avctx = ctx->avctx;
 176     avctx->opaque = sh;
 177     avctx->codec_type = AVMEDIA_TYPE_VIDEO;
 178     avctx->codec_id = lavc_codec->id;
 179
 180     if (lavc_codec->capabilities & CODEC_CAP_HWACCEL   // XvMC
 181         || lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
 182         ctx->do_dr1    = true;
 183         ctx->do_slices = true;
 184         lavc_param->threads    = 1;
 185         avctx->get_format      = get_format;
 186         avctx->get_buffer      = get_buffer;
 187         avctx->release_buffer  = release_buffer;
 188         avctx->reget_buffer    = get_buffer;
 189         avctx->draw_horiz_band = draw_slice;
 190         if (lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
 191             mp_msg(MSGT_DECVIDEO, MSGL_V, "[VD_FFMPEG] VDPAU hardware "
 192                    "decoding.\n");
 193         avctx->slice_flags = SLICE_FLAG_CODED_ORDER | SLICE_FLAG_ALLOW_FIELD;
 194     }
 195
 196     if (lavc_param->threads == 0) {
 197         int threads = default_thread_count();
 198         if (threads < 1) {
 199             mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[VD_FFMPEG] Could not determine "
 200                    "thread count to use, defaulting to 1.\n");
 201             threads = 1;
 202         }
 203         threads = FFMIN(threads, 16);
 204         lavc_param->threads = threads;
 205     }
 206     /* Our get_buffer and draw_horiz_band callbacks are not safe to call
 207      * from other threads. */
 208     if (lavc_param->threads > 1) {
 209         ctx->do_dr1 = false;
 210         ctx->do_slices = false;
 211         mp_tmsg(MSGT_DECVIDEO, MSGL_V, "Asking decoder to use "
 212                 "%d threads if supported.\n", lavc_param->threads);
 213     }
 214
 215     if (ctx->do_dr1) {
 216         avctx->flags |= CODEC_FLAG_EMU_EDGE;
 217         avctx->get_buffer = get_buffer;
 218         avctx->release_buffer = release_buffer;
 219         avctx->reget_buffer = get_buffer;
 220     }
 221
 222     avctx->flags |= lavc_param->bitexact;
 223
 224     avctx->coded_width = sh->disp_w;
 225     avctx->coded_height = sh->disp_h;
 226     avctx->workaround_bugs = lavc_param->workaround_bugs;
 227     if (lavc_param->gray)
 228         avctx->flags |= CODEC_FLAG_GRAY;
 229     avctx->flags2 |= lavc_param->fast;
 230     avctx->codec_tag = sh->format;
 231     avctx->stream_codec_tag = sh->video.fccHandler;
 232     avctx->idct_algo = lavc_param->idct_algo;
 233     avctx->error_concealment = lavc_param->error_concealment;
 234     avctx->debug = lavc_param->debug;
 235     if (lavc_param->debug)
 236         av_log_set_level(AV_LOG_DEBUG);
 237     avctx->debug_mv = lavc_param->vismv;
 238     avctx->skip_top   = lavc_param->skip_top;
 239     avctx->skip_bottom = lavc_param->skip_bottom;
 240     if (lavc_param->lowres_str != NULL) {
 241         int lowres, lowres_w;
 242         sscanf(lavc_param->lowres_str, "%d,%d", &lowres, &lowres_w);
 243         if (lowres < 1 || lowres > 16 ||
 244                 lowres_w > 0 && avctx->width < lowres_w)
 245             lowres = 0;
 246         avctx->lowres = lowres;
 247     }
 248     avctx->skip_loop_filter = str2AVDiscard(lavc_param->skip_loop_filter_str);
 249     avctx->skip_idct = str2AVDiscard(lavc_param->skip_idct_str);
 250     avctx->skip_frame = str2AVDiscard(lavc_param->skip_frame_str);
 251
 252     if (lavc_param->avopt) {
 253         if (parse_avopts(avctx, lavc_param->avopt) < 0) {
 254             mp_msg(MSGT_DECVIDEO, MSGL_ERR,
 255                    "Your options /%s/ look like gibberish to me pal\n",
 256                    lavc_param->avopt);
 257             uninit(sh);
 258             return 0;
 259         }
 260     }
 261
 262     // Do this after the above avopt handling in case it changes values
 263     ctx->skip_frame = avctx->skip_frame;
 264
 265     mp_dbg(MSGT_DECVIDEO, MSGL_DBG2,
 266            "libavcodec.size: %d x %d\n", avctx->width, avctx->height);
 267     switch (sh->format) {
 268     case mmioFOURCC('S','V','Q','3'):
 269         /* SVQ3 extradata can show up as sh->ImageDesc if demux_mov is used, or
 270          * in the phony AVI header if demux_lavf is used. The first case is
 271          * handled here; the second case falls through to the next section. */
 272         if (sh->ImageDesc) {
 273             avctx->extradata_size = (*(int *)sh->ImageDesc) - sizeof(int);
 274             avctx->extradata = av_mallocz(avctx->extradata_size +
 275                                           FF_INPUT_BUFFER_PADDING_SIZE);
 276             memcpy(avctx->extradata, ((int *)sh->ImageDesc) + 1,
 277                    avctx->extradata_size);
 278             break;
 279         }
 280     /* fallthrough */
 281
 282     case mmioFOURCC('A','V','R','n'):
 283     case mmioFOURCC('M','J','P','G'):
 284         /* AVRn stores huffman table in AVI header */
 285         /* Pegasus MJPEG stores it also in AVI header, but it uses the common
 286          * MJPG fourcc :( */
 287         if (!sh->bih || sh->bih->biSize <= sizeof(*sh->bih))
 288             break;
 289         av_opt_set_int(avctx, "extern_huff", 1, AV_OPT_SEARCH_CHILDREN);
 290         avctx->extradata_size = sh->bih->biSize - sizeof(*sh->bih);
 291         avctx->extradata = av_mallocz(avctx->extradata_size +
 292                                       FF_INPUT_BUFFER_PADDING_SIZE);
 293         memcpy(avctx->extradata, sh->bih + 1, avctx->extradata_size);
 294         break;
 295
 296     case mmioFOURCC('R','V','1','0'):
 297     case mmioFOURCC('R','V','1','3'):
 298     case mmioFOURCC('R','V','2','0'):
 299     case mmioFOURCC('R','V','3','0'):
 300     case mmioFOURCC('R','V','4','0'):
 301         if (sh->bih->biSize < sizeof(*sh->bih) + 8) {
 302             // only 1 packet per frame & sub_id from fourcc
 303             avctx->extradata_size = 8;
 304             avctx->extradata = av_mallocz(avctx->extradata_size +
 305                                           FF_INPUT_BUFFER_PADDING_SIZE);
 306             ((uint32_t *)avctx->extradata)[0] = 0;
 307             ((uint32_t *)avctx->extradata)[1] =
 308                     sh->format == mmioFOURCC('R','V','1','3') ?
 309                     0x10003001 : 0x10000000;
 310         } else {
 311             // has extra slice header (demux_rm or rm->avi streamcopy)
 312             avctx->extradata_size = sh->bih->biSize - sizeof(*sh->bih);
 313             avctx->extradata = av_mallocz(avctx->extradata_size +
 314                                           FF_INPUT_BUFFER_PADDING_SIZE);
 315             memcpy(avctx->extradata, sh->bih + 1, avctx->extradata_size);
 316         }
 317         break;
 318
 319     default:
 320         if (!sh->bih || sh->bih->biSize <= sizeof(*sh->bih))
 321             break;
 322         avctx->extradata_size = sh->bih->biSize - sizeof(*sh->bih);
 323         avctx->extradata = av_mallocz(avctx->extradata_size +
 324                                       FF_INPUT_BUFFER_PADDING_SIZE);
 325         memcpy(avctx->extradata, sh->bih + 1, avctx->extradata_size);
 326         break;
 327     }
 328
 329     if (sh->bih)
 330         avctx->bits_per_coded_sample = sh->bih->biBitCount;
 331
 332     avctx->thread_count = lavc_param->threads;
 333
 334     /* open it */
 335     if (avcodec_open2(avctx, lavc_codec, NULL) < 0) {
 336         mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not open codec.\n");
 337         uninit(sh);
 338         return 0;
 339     }
 340     return 1;
 341 }
 342
 343 static void uninit(sh_video_t *sh)
 344 {
 345     vd_ffmpeg_ctx *ctx = sh->context;
 346     AVCodecContext *avctx = ctx->avctx;
 347
 348     sh->codecname = NULL;
 349     if (sh->opts->lavc_param.vstats && avctx->coded_frame) {
 350         for (int i = 1; i < 32; i++)
 351             mp_msg(MSGT_DECVIDEO, MSGL_INFO,
 352                    "QP: %d, count: %d\n", i, ctx->qp_stat[i]);
 353         mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] Arithmetic mean of QP: "
 354             "%2.4f, Harmonic mean of QP: %2.4f\n",
 355             ctx->qp_sum / avctx->coded_frame->coded_picture_number,
 356             1.0 / (ctx->inv_qp_sum / avctx->coded_frame->coded_picture_number));
 357     }
 358
 359     if (avctx) {
 360         if (avctx->codec && avcodec_close(avctx) < 0)
 361             mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not close codec.\n");
 362
 363         av_freep(&avctx->extradata);
 364         av_freep(&avctx->slice_offset);
 365     }
 366
 367     av_freep(&avctx);
 368     av_freep(&ctx->pic);
 369     talloc_free(ctx);
 370 }
 371
 372 static void draw_slice(struct AVCodecContext *s,
 373                        const AVFrame *src, int offset[4],
 374                        int y, int type, int height)
 375 {
 376     sh_video_t *sh = s->opaque;
 377     uint8_t *source[MP_MAX_PLANES] = {
 378         src->data[0] + offset[0], src->data[1] + offset[1],
 379         src->data[2] + offset[2]
 380     };
 381     int strides[MP_MAX_PLANES] = {
 382         src->linesize[0], src->linesize[1], src->linesize[2]
 383     };
 384     if (height < 0) {
 385         int i;
 386         height = -height;
 387         y -= height;
 388         for (i = 0; i < MP_MAX_PLANES; i++) {
 389             strides[i] = -strides[i];
 390             source[i] -= strides[i];
 391         }
 392     }
 393     if (y < sh->disp_h) {
 394         height = FFMIN(height, sh->disp_h - y);
 395         mpcodecs_draw_slice(sh, source, strides, sh->disp_w, height, 0, y);
 396     }
 397 }
 398
 399 static enum mp_csp avcol_spc_to_mp_csp(enum AVColorSpace colorspace)
 400 {
 401     switch (colorspace) {
 402     case AVCOL_SPC_BT709:
 403         return MP_CSP_BT_709;
 404         break;
 405     case AVCOL_SPC_BT470BG:
 406     case AVCOL_SPC_SMPTE170M:
 407         return MP_CSP_BT_601;
 408         break;
 409     case AVCOL_SPC_SMPTE240M:
 410         return MP_CSP_SMPTE_240M;
 411         break;
 412     default:
 413         return MP_CSP_AUTO;
 414     }
 415 }
 416
 417 static enum mp_csp_levels avcol_range_to_mp_csp_levels(enum AVColorRange range)
 418 {
 419     switch (range) {
 420     case AVCOL_RANGE_MPEG:
 421         return MP_CSP_LEVELS_TV;
 422         break;
 423     case AVCOL_RANGE_JPEG:
 424         return MP_CSP_LEVELS_PC;
 425         break;
 426     default:
 427         return MP_CSP_LEVELS_AUTO;
 428     }
 429 }
 430
 431 static int init_vo(sh_video_t *sh, enum PixelFormat pix_fmt)
 432 {
 433     vd_ffmpeg_ctx *ctx = sh->context;
 434     AVCodecContext *avctx = ctx->avctx;
 435     float aspect = av_q2d(avctx->sample_aspect_ratio) *
 436                    avctx->width / avctx->height;
 437     int width, height;
 438
 439     width = avctx->width;
 440     height = avctx->height;
 441
 442     // HACK!
 443     // if sh->ImageDesc is non-NULL, it means we decode QuickTime(tm) video.
 444     // use dimensions from BIH to avoid black borders at the right and bottom.
 445     if (sh->bih && sh->ImageDesc) {
 446         width = sh->bih->biWidth >> avctx->lowres;
 447         height = sh->bih->biHeight >> avctx->lowres;
 448     }
 449
 450     /* Reconfiguring filter/VO chain may invalidate direct rendering buffers
 451      * we have allocated for libavcodec (including the VDPAU HW decoding
 452      * case). Is it guaranteed that the code below only triggers in a situation
 453      * with no busy direct rendering buffers for reference frames?
 454      */
 455     if (av_cmp_q(avctx->sample_aspect_ratio, ctx->last_sample_aspect_ratio) ||
 456             width != sh->disp_w || height != sh->disp_h ||
 457             pix_fmt != ctx->pix_fmt || !ctx->vo_initialized) {
 458         ctx->vo_initialized = 0;
 459         mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", aspect);
 460
 461         // Do not overwrite s->aspect on the first call, so that a container
 462         // aspect if available is preferred.
 463         // But set it even if the sample aspect did not change, since a
 464         // resolution change can cause an aspect change even if the
 465         // _sample_ aspect is unchanged.
 466         if (sh->aspect == 0 || ctx->last_sample_aspect_ratio.den)
 467             sh->aspect = aspect;
 468         ctx->last_sample_aspect_ratio = avctx->sample_aspect_ratio;
 469         sh->disp_w = width;
 470         sh->disp_h = height;
 471         ctx->pix_fmt = pix_fmt;
 472         ctx->best_csp = pixfmt2imgfmt(pix_fmt);
 473         const unsigned int *supported_fmts;
 474         if (ctx->best_csp == IMGFMT_YV12)
 475             supported_fmts = (const unsigned int[]){
 476                 IMGFMT_YV12, IMGFMT_I420, IMGFMT_IYUV, 0xffffffff
 477             };
 478         else if (ctx->best_csp == IMGFMT_422P)
 479             supported_fmts = (const unsigned int[]){
 480                 IMGFMT_422P, IMGFMT_YV12, IMGFMT_I420, IMGFMT_IYUV, 0xffffffff
 481             };
 482         else
 483             supported_fmts = (const unsigned int[]){ctx->best_csp, 0xffffffff};
 484
 485         sh->colorspace = avcol_spc_to_mp_csp(avctx->colorspace);
 486         sh->color_range = avcol_range_to_mp_csp_levels(avctx->color_range);
 487
 488         if (!mpcodecs_config_vo2(sh, sh->disp_w, sh->disp_h, supported_fmts,
 489                                  ctx->best_csp))
 490             return -1;
 491         ctx->vo_initialized = 1;
 492     }
 493     return 0;
 494 }
 495
 496 static int get_buffer(AVCodecContext *avctx, AVFrame *pic)
 497 {
 498     sh_video_t *sh = avctx->opaque;
 499     vd_ffmpeg_ctx *ctx = sh->context;
 500     mp_image_t *mpi = NULL;
 501     int flags = MP_IMGFLAG_ACCEPT_ALIGNED_STRIDE |
 502                 MP_IMGFLAG_PREFER_ALIGNED_STRIDE;
 503     int type = MP_IMGTYPE_IPB;
 504     int width = avctx->width;
 505     int height = avctx->height;
 506     // special case to handle reget_buffer without buffer hints
 507     if (pic->opaque && pic->data[0] && !pic->buffer_hints)
 508         return 0;
 509     avcodec_align_dimensions(avctx, &width, &height);
 510
 511     if (pic->buffer_hints) {
 512         mp_msg(MSGT_DECVIDEO, MSGL_DBG2, "Buffer hints: %u\n",
 513                pic->buffer_hints);
 514         type = MP_IMGTYPE_TEMP;
 515         if (pic->buffer_hints & FF_BUFFER_HINTS_READABLE)
 516             flags |= MP_IMGFLAG_READABLE;
 517         if (pic->buffer_hints & FF_BUFFER_HINTS_PRESERVE) {
 518             type = MP_IMGTYPE_STATIC;
 519             flags |= MP_IMGFLAG_PRESERVE;
 520         }
 521         if (pic->buffer_hints & FF_BUFFER_HINTS_REUSABLE) {
 522             type = MP_IMGTYPE_STATIC;
 523             flags |= MP_IMGFLAG_PRESERVE;
 524         }
 525         flags |= ctx->do_slices ? MP_IMGFLAG_DRAW_CALLBACK : 0;
 526         mp_msg(MSGT_DECVIDEO, MSGL_DBG2,
 527                type == MP_IMGTYPE_STATIC ? "using STATIC\n" : "using TEMP\n");
 528     } else {
 529         if (!pic->reference) {
 530             ctx->b_count++;
 531             flags |= ctx->do_slices ? MP_IMGFLAG_DRAW_CALLBACK : 0;
 532         } else {
 533             ctx->ip_count++;
 534             flags |= MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE
 535                      | (ctx->do_slices ? MP_IMGFLAG_DRAW_CALLBACK : 0);
 536         }
 537     }
 538
 539     if (init_vo(sh, avctx->pix_fmt) < 0) {
 540         avctx->release_buffer = avcodec_default_release_buffer;
 541         avctx->get_buffer = avcodec_default_get_buffer;
 542         avctx->reget_buffer = avcodec_default_reget_buffer;
 543         if (pic->data[0])
 544             release_buffer(avctx, pic);
 545         return avctx->get_buffer(avctx, pic);
 546     }
 547
 548     if (IMGFMT_IS_HWACCEL(ctx->best_csp))
 549         type =  MP_IMGTYPE_NUMBERED | (0xffff << 16);
 550     else if (!pic->buffer_hints) {
 551         if (ctx->b_count > 1 || ctx->ip_count > 2) {
 552             mp_tmsg(MSGT_DECVIDEO, MSGL_WARN, "[VD_FFMPEG] DRI failure.\n");
 553
 554             ctx->do_dr1 = 0; //FIXME
 555             avctx->get_buffer = avcodec_default_get_buffer;
 556             avctx->reget_buffer = avcodec_default_reget_buffer;
 557             if (pic->data[0])
 558                 release_buffer(avctx, pic);
 559             return avctx->get_buffer(avctx, pic);
 560         }
 561
 562         if (avctx->has_b_frames || ctx->b_count)
 563             type = MP_IMGTYPE_IPB;
 564         else
 565             type = MP_IMGTYPE_IP;
 566         mp_msg(MSGT_DECVIDEO, MSGL_DBG2,
 567                type == MP_IMGTYPE_IPB ? "using IPB\n" : "using IP\n");
 568     }
 569
 570     if (ctx->best_csp == IMGFMT_RGB8 || ctx->best_csp == IMGFMT_BGR8)
 571         flags |= MP_IMGFLAG_RGB_PALETTE;
 572     mpi = mpcodecs_get_image(sh, type, flags, width, height);
 573     if (!mpi)
 574         return -1;
 575
 576     // ok, let's see what did we get:
 577     if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK &&
 578         !(mpi->flags & MP_IMGFLAG_DIRECT)) {
 579         // nice, filter/vo likes draw_callback :)
 580         avctx->draw_horiz_band = draw_slice;
 581     } else
 582         avctx->draw_horiz_band = NULL;
 583     if (IMGFMT_IS_HWACCEL(mpi->imgfmt))
 584         avctx->draw_horiz_band = draw_slice;
 585
 586     pic->data[0] = mpi->planes[0];
 587     pic->data[1] = mpi->planes[1];
 588     pic->data[2] = mpi->planes[2];
 589     pic->data[3] = mpi->planes[3];
 590
 591     /* Note: some (many) codecs in libavcodec require
 592      * linesize[1] == linesize[2] and no changes between frames.
 593      * Lavc will check that and die with an error message if it's not true.
 594      */
 595     pic->linesize[0] = mpi->stride[0];
 596     pic->linesize[1] = mpi->stride[1];
 597     pic->linesize[2] = mpi->stride[2];
 598     pic->linesize[3] = mpi->stride[3];
 599
 600     pic->opaque = mpi;
 601
 602     pic->type = FF_BUFFER_TYPE_USER;
 603
 604     /* The libavcodec reordered_opaque functionality is implemented by
 605      * a similar copy in avcodec_default_get_buffer() and without a
 606      * workaround like this it'd stop working when a custom buffer
 607      * callback is used.
 608      */
 609     pic->reordered_opaque = avctx->reordered_opaque;
 610     return 0;
 611 }
 612
 613 static void release_buffer(struct AVCodecContext *avctx, AVFrame *pic)
 614 {
 615     mp_image_t *mpi = pic->opaque;
 616     sh_video_t *sh = avctx->opaque;
 617     vd_ffmpeg_ctx *ctx = sh->context;
 618
 619     if (ctx->ip_count <= 2 && ctx->b_count <= 1) {
 620         if (mpi->flags & MP_IMGFLAG_PRESERVE)
 621             ctx->ip_count--;
 622         else
 623             ctx->b_count--;
 624     }
 625
 626     if (mpi) {
 627         // Palette support: free palette buffer allocated in get_buffer
 628         if (mpi->bpp == 8)
 629             av_freep(&mpi->planes[1]);
 630         // release mpi (in case MPI_IMGTYPE_NUMBERED is used, e.g. for VDPAU)
 631         mpi->usage_count--;
 632     }
 633
 634     if (pic->type != FF_BUFFER_TYPE_USER) {
 635         avcodec_default_release_buffer(avctx, pic);
 636         return;
 637     }
 638
 639     for (int i = 0; i < 4; i++)
 640         pic->data[i] = NULL;
 641 }
 642
 643 static av_unused void swap_palette(void *pal)
 644 {
 645     int i;
 646     uint32_t *p = pal;
 647     for (i = 0; i < AVPALETTE_COUNT; i++)
 648         p[i] = le2me_32(p[i]);
 649 }
 650
 651 static struct mp_image *decode(struct sh_video *sh, struct demux_packet *packet,
 652                                void *data, int len, int flags,
 653                                double *reordered_pts)
 654 {
 655     int got_picture = 0;
 656     int ret;
 657     vd_ffmpeg_ctx *ctx = sh->context;
 658     AVFrame *pic = ctx->pic;
 659     AVCodecContext *avctx = ctx->avctx;
 660     struct lavc_param *lavc_param = &sh->opts->lavc_param;
 661     mp_image_t *mpi = NULL;
 662     int dr1 = ctx->do_dr1;
 663     AVPacket pkt;
 664
 665     if (!dr1)
 666         avctx->draw_horiz_band = NULL;
 667
 668     if (flags & 2)
 669         avctx->skip_frame = AVDISCARD_ALL;
 670     else if (flags & 1)
 671         avctx->skip_frame = AVDISCARD_NONREF;
 672     else
 673         avctx->skip_frame = ctx->skip_frame;
 674
 675     av_init_packet(&pkt);
 676     pkt.data = data;
 677     pkt.size = len;
 678     /* Some codecs (ZeroCodec, some cases of PNG) may want keyframe info
 679      * from demuxer. */
 680     if (packet && packet->keyframe)
 681         pkt.flags |= AV_PKT_FLAG_KEY;
 682     if (packet && packet->avpacket) {
 683         pkt.side_data = packet->avpacket->side_data;
 684         pkt.side_data_elems = packet->avpacket->side_data_elems;
 685     }
 686     // The avcodec opaque field stupidly supports only int64_t type
 687     union pts { int64_t i; double d; };
 688     avctx->reordered_opaque = (union pts){.d = *reordered_pts}.i;
 689     ret = avcodec_decode_video2(avctx, pic, &got_picture, &pkt);
 690     *reordered_pts = (union pts){.i = pic->reordered_opaque}.d;
 691
 692     dr1 = ctx->do_dr1;
 693     if (ret < 0)
 694         mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Error while decoding frame!\n");
 695     //-- vstats generation
 696     while (lavc_param->vstats) { // always one time loop
 697         static FILE *fvstats = NULL;
 698         char filename[20];
 699         static long long int all_len = 0;
 700         static int frame_number = 0;
 701         static double all_frametime = 0.0;
 702         AVFrame *pic = avctx->coded_frame;
 703         double quality = 0.0;
 704
 705         if (!pic)
 706             break;
 707
 708         if (!fvstats) {
 709             time_t today2;
 710             struct tm *today;
 711             today2 = time(NULL);
 712             today = localtime(&today2);
 713             sprintf(filename, "vstats_%02d%02d%02d.log", today->tm_hour,
 714                     today->tm_min, today->tm_sec);
 715             fvstats = fopen(filename, "w");
 716             if (!fvstats) {
 717                 perror("fopen");
 718                 lavc_param->vstats = 0; // disable block
 719                 break;
 720                 /*exit(1);*/
 721             }
 722         }
 723
 724         // average MB quantizer
 725         {
 726             int x, y;
 727             int w = ((avctx->width << avctx->lowres) + 15) >> 4;
 728             int h = ((avctx->height << avctx->lowres) + 15) >> 4;
 729             int8_t *q = pic->qscale_table;
 730             for (y = 0; y < h; y++) {
 731                 for (x = 0; x < w; x++)
 732                     quality += (double)*(q + x);
 733                 q += pic->qstride;
 734             }
 735             quality /= w * h;
 736         }
 737
 738         all_len += len;
 739         all_frametime += sh->frametime;
 740         fprintf(fvstats, "frame= %5d q= %2.2f f_size= %6d s_size= %8.0fkB ",
 741                 ++frame_number, quality, len, (double)all_len / 1024);
 742         fprintf(fvstats, "time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
 743                 all_frametime, (double)(len * 8) / sh->frametime / 1000.0,
 744                 (double)(all_len * 8) / all_frametime / 1000.0);
 745         switch (pic->pict_type) {
 746         case AV_PICTURE_TYPE_I:
 747             fprintf(fvstats, "type= I\n");
 748             break;
 749         case AV_PICTURE_TYPE_P:
 750             fprintf(fvstats, "type= P\n");
 751             break;
 752         case AV_PICTURE_TYPE_S:
 753             fprintf(fvstats, "type= S\n");
 754             break;
 755         case AV_PICTURE_TYPE_B:
 756             fprintf(fvstats, "type= B\n");
 757             break;
 758         default:
 759             fprintf(fvstats, "type= ? (%d)\n", pic->pict_type);
 760             break;
 761         }
 762
 763         ctx->qp_stat[(int)(quality + 0.5)]++;
 764         ctx->qp_sum += quality;
 765         ctx->inv_qp_sum += 1.0 / (double)quality;
 766
 767         break;
 768     }
 769     //--
 770
 771     if (!got_picture)
 772         return NULL;                     // skipped image
 773
 774     if (init_vo(sh, avctx->pix_fmt) < 0)
 775         return NULL;
 776
 777     if (dr1 && pic->opaque)
 778         mpi = (mp_image_t *)pic->opaque;
 779
 780     if (!mpi)
 781         mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, MP_IMGFLAG_PRESERVE,
 782                                  avctx->width, avctx->height);
 783     if (!mpi) {   // temporary error?
 784         mp_tmsg(MSGT_DECVIDEO, MSGL_WARN,
 785                 "[VD_FFMPEG] Couldn't allocate image for codec.\n");
 786         return NULL;
 787     }
 788
 789     if (!dr1) {
 790         mpi->planes[0] = pic->data[0];
 791         mpi->planes[1] = pic->data[1];
 792         mpi->planes[2] = pic->data[2];
 793         mpi->planes[3] = pic->data[3];
 794         mpi->stride[0] = pic->linesize[0];
 795         mpi->stride[1] = pic->linesize[1];
 796         mpi->stride[2] = pic->linesize[2];
 797         mpi->stride[3] = pic->linesize[3];
 798     }
 799
 800     if (!mpi->planes[0])
 801         return NULL;
 802
 803     if (ctx->best_csp == IMGFMT_422P && mpi->chroma_y_shift == 1) {
 804         // we have 422p but user wants 420p
 805         mpi->stride[1] *= 2;
 806         mpi->stride[2] *= 2;
 807     }
 808
 809 #if HAVE_BIGENDIAN
 810     // FIXME: this might cause problems for buffers with FF_BUFFER_HINTS_PRESERVE
 811     if (mpi->bpp == 8)
 812         swap_palette(mpi->planes[1]);
 813 #endif
 814
 815     mpi->qscale = pic->qscale_table;
 816     mpi->qstride = pic->qstride;
 817     mpi->pict_type = pic->pict_type;
 818     mpi->qscale_type = pic->qscale_type;
 819     mpi->fields = MP_IMGFIELD_ORDERED;
 820     if (pic->interlaced_frame)
 821         mpi->fields |= MP_IMGFIELD_INTERLACED;
 822     if (pic->top_field_first)
 823         mpi->fields |= MP_IMGFIELD_TOP_FIRST;
 824     if (pic->repeat_pict == 1)
 825         mpi->fields |= MP_IMGFIELD_REPEAT_FIRST;
 826
 827     return mpi;
 828 }
 829
 830 static enum PixelFormat get_format(struct AVCodecContext *avctx,
 831                                    const enum PixelFormat *fmt)
 832 {
 833     sh_video_t *sh = avctx->opaque;
 834     int i;
 835
 836     for (i = 0; fmt[i] != PIX_FMT_NONE; i++) {
 837         int imgfmt = pixfmt2imgfmt(fmt[i]);
 838         if (!IMGFMT_IS_HWACCEL(imgfmt))
 839             continue;
 840         mp_msg(MSGT_DECVIDEO, MSGL_V, "[VD_FFMPEG] Trying pixfmt=%d.\n", i);
 841         if (init_vo(sh, fmt[i]) >= 0)
 842             break;
 843     }
 844     return fmt[i];
 845 }
 846
 847 static int control(sh_video_t *sh, int cmd, void *arg, ...)
 848 {
 849     vd_ffmpeg_ctx *ctx = sh->context;
 850     AVCodecContext *avctx = ctx->avctx;
 851     switch (cmd) {
 852     case VDCTRL_QUERY_FORMAT: {
 853         int format = (*((int *)arg));
 854         if (format == ctx->best_csp)
 855             return CONTROL_TRUE;
 856         // possible conversions:
 857         switch (format) {
 858         case IMGFMT_YV12:
 859         case IMGFMT_IYUV:
 860         case IMGFMT_I420:
 861             // "converted" using pointer/stride modification
 862             if (ctx->best_csp == IMGFMT_YV12)
 863                 return CONTROL_TRUE;   // u/v swap
 864             if (ctx->best_csp == IMGFMT_422P && !ctx->do_dr1)
 865                 return CONTROL_TRUE;   // half stride
 866             break;
 867         }
 868         return CONTROL_FALSE;
 869     }
 870     case VDCTRL_RESYNC_STREAM:
 871         avcodec_flush_buffers(avctx);
 872         return CONTROL_TRUE;
 873     case VDCTRL_QUERY_UNSEEN_FRAMES:;
 874         int delay = avctx->has_b_frames;
 875         if (avctx->active_thread_type & FF_THREAD_FRAME)
 876             delay += avctx->thread_count - 1;
 877         return delay + 10;
 878     case VDCTRL_RESET_ASPECT:
 879         if (ctx->vo_initialized)
 880             ctx->vo_initialized = false;
 881         init_vo(sh, avctx->pix_fmt);
 882         return true;
 883     }
 884     return CONTROL_UNKNOWN;
 885 }
 886
 887 const struct vd_functions mpcodecs_vd_ffmpeg = {
 888     .info = &info,
 889     .init = init,
 890     .uninit = uninit,
 891     .control = control,
 892     .decode2 = decode
 893 };