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