libmpcodecs/vd_ffmpeg.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <assert.h>
   4 #include <time.h>
   5
   6 #include "config.h"
   7 #include "mp_msg.h"
   8 #include "help_mp.h"
   9 #include "options.h"
  10 #include "av_opts.h"
  11
  12 #include "libavutil/common.h"
  13 #include "libavutil/intreadwrite.h"
  14 #include "mpbswap.h"
  15 #include "fmt-conversion.h"
  16
  17 #include "vd_internal.h"
  18
  19 static const vd_info_t info = {
  20     "FFmpeg's libavcodec codec family",
  21     "ffmpeg",
  22     "A'rpi",
  23     "A'rpi, Michael, Alex",
  24     "native codecs"
  25 };
  26
  27 LIBVD_EXTERN(ffmpeg)
  28
  29 #include "libavcodec/avcodec.h"
  30
  31 #if CONFIG_XVMC
  32 #include "libavcodec/xvmc.h"
  33 #endif
  34
  35 int avcodec_initialized=0;
  36
  37 typedef struct {
  38     AVCodecContext *avctx;
  39     AVFrame *pic;
  40     enum PixelFormat pix_fmt;
  41     int do_slices;
  42     int do_dr1;
  43     int vo_initialized;
  44     int best_csp;
  45     int b_age;
  46     int ip_age[2];
  47     int qp_stat[32];
  48     double qp_sum;
  49     double inv_qp_sum;
  50     int ip_count;
  51     int b_count;
  52     AVRational last_sample_aspect_ratio;
  53     int lowres;
  54 } vd_ffmpeg_ctx;
  55
  56 #include "m_option.h"
  57
  58 static int get_buffer(AVCodecContext *avctx, AVFrame *pic);
  59 static void release_buffer(AVCodecContext *avctx, AVFrame *pic);
  60 static void draw_slice(struct AVCodecContext *s, const AVFrame *src,
  61                        int offset[4], int y, int type, int height);
  62
  63 static enum PixelFormat get_format(struct AVCodecContext *avctx,
  64                                    const enum PixelFormat *pix_fmt);
  65
  66 const m_option_t lavc_decode_opts_conf[]={
  67     OPT_INTRANGE("bug", lavc_param.workaround_bugs, 0, -1, 999999),
  68     OPT_INTRANGE("er", lavc_param.error_resilience, 0, 0, 99),
  69     OPT_FLAG_ON("gray", lavc_param.gray, 0),
  70     OPT_INTRANGE("idct", lavc_param.idct_algo, 0, 0, 99),
  71     OPT_INTRANGE("ec", lavc_param.error_concealment, 0, 0, 99),
  72     OPT_FLAG_ON("vstats", lavc_param.vstats, 0),
  73     OPT_INTRANGE("debug", lavc_param.debug, 0, 0, 9999999),
  74     OPT_INTRANGE("vismv", lavc_param.vismv, 0, 0, 9999999),
  75     OPT_INTRANGE("st", lavc_param.skip_top, 0, 0, 999),
  76     OPT_INTRANGE("sb", lavc_param.skip_bottom, 0, 0, 999),
  77     OPT_FLAG_CONSTANTS("fast", lavc_param.fast, 0, 0, CODEC_FLAG2_FAST),
  78     OPT_STRING("lowres", lavc_param.lowres_str, 0),
  79     OPT_STRING("skiploopfilter", lavc_param.skip_loop_filter_str, 0),
  80     OPT_STRING("skipidct", lavc_param.skip_idct_str, 0),
  81     OPT_STRING("skipframe", lavc_param.skip_frame_str, 0),
  82     OPT_INTRANGE("threads", lavc_param.threads, 0, 1, 8),
  83     OPT_FLAG_CONSTANTS("bitexact", lavc_param.bitexact, 0, 0, CODEC_FLAG_BITEXACT),
  84     OPT_STRING("o", lavc_param.avopt, 0),
  85     {NULL, NULL, 0, 0, 0, 0, NULL}
  86 };
  87
  88 static enum AVDiscard str2AVDiscard(char *str) {
  89     if (!str)                               return AVDISCARD_DEFAULT;
  90     if (strcasecmp(str, "none"   ) == 0)    return AVDISCARD_NONE;
  91     if (strcasecmp(str, "default") == 0)    return AVDISCARD_DEFAULT;
  92     if (strcasecmp(str, "nonref" ) == 0)    return AVDISCARD_NONREF;
  93     if (strcasecmp(str, "bidir"  ) == 0)    return AVDISCARD_BIDIR;
  94     if (strcasecmp(str, "nonkey" ) == 0)    return AVDISCARD_NONKEY;
  95     if (strcasecmp(str, "all"    ) == 0)    return AVDISCARD_ALL;
  96     mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Unknown discard value %s\n", str);
  97     return AVDISCARD_DEFAULT;
  98 }
  99
 100 // to set/get/query special features/parameters
 101 static int control(sh_video_t *sh, int cmd, void *arg, ...){
 102     vd_ffmpeg_ctx *ctx = sh->context;
 103     AVCodecContext *avctx = ctx->avctx;
 104     switch(cmd){
 105     case VDCTRL_QUERY_FORMAT:
 106     {
 107         int format =(*((int *)arg));
 108         if(format == ctx->best_csp) return CONTROL_TRUE;//supported
 109         // possible conversions:
 110         switch(format){
 111         case IMGFMT_YV12:
 112         case IMGFMT_IYUV:
 113         case IMGFMT_I420:
 114             // "converted" using pointer/stride modification
 115             if(avctx->pix_fmt==PIX_FMT_YUV420P) return CONTROL_TRUE;// u/v swap
 116             if(avctx->pix_fmt==PIX_FMT_YUV422P && !ctx->do_dr1) return CONTROL_TRUE;// half stride
 117             break;
 118 #if CONFIG_XVMC
 119         case IMGFMT_XVMC_IDCT_MPEG2:
 120         case IMGFMT_XVMC_MOCO_MPEG2:
 121             if(avctx->pix_fmt==PIX_FMT_XVMC_MPEG2_IDCT) return CONTROL_TRUE;
 122 #endif
 123         }
 124         return CONTROL_FALSE;
 125     }
 126     case VDCTRL_RESYNC_STREAM:
 127         avcodec_flush_buffers(avctx);
 128         return CONTROL_TRUE;
 129     case VDCTRL_QUERY_UNSEEN_FRAMES:;
 130         int delay = avctx->has_b_frames;
 131 #ifdef FF_THREAD_FRAME
 132         // FFmpeg-mt has extra delay when using frame threading
 133         if (avctx->thread_type & FF_THREAD_FRAME)
 134             delay += avctx->thread_count - 1;
 135 #endif
 136         return delay + 10;
 137     }
 138     return CONTROL_UNKNOWN;
 139 }
 140
 141 static void mp_msp_av_log_callback(void *ptr, int level, const char *fmt, va_list vl)
 142 {
 143     static int print_prefix=1;
 144     AVClass *avc= ptr ? *(AVClass **)ptr : NULL;
 145     int type= MSGT_FIXME;
 146     int mp_level;
 147     char buf[256];
 148
 149     switch(level){
 150     case AV_LOG_DEBUG:  mp_level= MSGL_V   ; break;
 151     case AV_LOG_INFO :  mp_level= MSGL_INFO; break;
 152     case AV_LOG_ERROR:  mp_level= MSGL_ERR ; break;
 153     default          :  mp_level= MSGL_ERR ; break;
 154     }
 155
 156     if (!mp_msg_test(type, mp_level)) return;
 157
 158     if(ptr){
 159         if(!strcmp(avc->class_name, "AVCodecContext")){
 160             AVCodecContext *s= ptr;
 161             if(s->codec){
 162                 if(s->codec->type == CODEC_TYPE_AUDIO){
 163                     if(s->codec->decode)
 164                         type= MSGT_DECAUDIO;
 165                 }else if(s->codec->type == CODEC_TYPE_VIDEO){
 166                     if(s->codec->decode)
 167                         type= MSGT_DECVIDEO;
 168                 }
 169                 //FIXME subtitles, encoders (what msgt for them? there is no appropriate ...)
 170             }
 171         }else if(!strcmp(avc->class_name, "AVFormatContext")){
 172 #if 0 //needs libavformat include FIXME iam too lazy to do this cleanly, probably the whole should be moved out of this file ...
 173             AVFormatContext *s= ptr;
 174             if(s->iformat)
 175                 type= MSGT_DEMUXER;
 176             else if(s->oformat)
 177                 type= MSGT_MUXER;
 178 #endif
 179         }
 180     }
 181
 182     if(print_prefix && avc) {
 183         mp_msg(type, mp_level, "[%s @ %p]", avc->item_name(ptr), avc);
 184     }
 185
 186     print_prefix= strchr(fmt, '\n') != NULL;
 187     vsnprintf(buf, sizeof(buf), fmt, vl);
 188     mp_msg(type, mp_level, buf);
 189 }
 190
 191 static void set_format_params(struct AVCodecContext *avctx, enum PixelFormat fmt){
 192     int imgfmt;
 193     imgfmt = pixfmt2imgfmt(fmt);
 194     if (IMGFMT_IS_XVMC(imgfmt) || IMGFMT_IS_VDPAU(imgfmt)) {
 195         sh_video_t *sh     = avctx->opaque;
 196         vd_ffmpeg_ctx *ctx = sh->context;
 197         ctx->do_dr1    = 1;
 198         ctx->do_slices = 1;
 199         avctx->thread_count    = 1;
 200         avctx->get_buffer      = get_buffer;
 201         avctx->release_buffer  = release_buffer;
 202         avctx->reget_buffer    = get_buffer;
 203         avctx->draw_horiz_band = draw_slice;
 204         mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] XVMC-accelerated MPEG-2.\n");
 205         avctx->slice_flags = SLICE_FLAG_CODED_ORDER|SLICE_FLAG_ALLOW_FIELD;
 206     }
 207 }
 208
 209 // init driver
 210 static int init(sh_video_t *sh){
 211     struct lavc_param *lavc_param = &sh->opts->lavc_param;
 212     AVCodecContext *avctx;
 213     vd_ffmpeg_ctx *ctx;
 214     AVCodec *lavc_codec;
 215     int lowres_w=0;
 216     int do_vis_debug= lavc_param->vismv || (lavc_param->debug&(FF_DEBUG_VIS_MB_TYPE|FF_DEBUG_VIS_QP));
 217
 218     if(!avcodec_initialized){
 219         avcodec_init();
 220         avcodec_register_all();
 221         avcodec_initialized=1;
 222         av_log_set_callback(mp_msp_av_log_callback);
 223     }
 224
 225     ctx = sh->context = malloc(sizeof(vd_ffmpeg_ctx));
 226     if (!ctx)
 227         return 0;
 228     memset(ctx, 0, sizeof(vd_ffmpeg_ctx));
 229
 230     lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh->codec->dll);
 231     if(!lavc_codec){
 232         mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Cannot find codec '%s' in libavcodec...\n", sh->codec->dll);
 233         uninit(sh);
 234         return 0;
 235     }
 236
 237     if(sh->opts->vd_use_slices && (lavc_codec->capabilities&CODEC_CAP_DRAW_HORIZ_BAND) && !do_vis_debug)
 238         ctx->do_slices=1;
 239
 240     if(lavc_codec->capabilities&CODEC_CAP_DR1 && !do_vis_debug && lavc_codec->id != CODEC_ID_H264 && lavc_codec->id != CODEC_ID_INTERPLAY_VIDEO && lavc_codec->id != CODEC_ID_ROQ)
 241         ctx->do_dr1=1;
 242     ctx->b_age= ctx->ip_age[0]= ctx->ip_age[1]= 256*256*256*64;
 243     ctx->ip_count= ctx->b_count= 0;
 244
 245     ctx->pic = avcodec_alloc_frame();
 246     ctx->avctx = avcodec_alloc_context();
 247     avctx = ctx->avctx;
 248     avctx->opaque = sh;
 249
 250 #if CONFIG_VDPAU
 251     if(lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU){
 252         avctx->get_format = get_format;
 253     }
 254 #endif /* CONFIG_VDPAU */
 255 #if CONFIG_XVMC
 256     if(lavc_codec->capabilities & CODEC_CAP_HWACCEL){
 257         mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] XVMC accelerated codec.\n");
 258         avctx->get_format= get_format;//for now only this decoder will use it
 259         // HACK around badly placed checks in mpeg_mc_decode_init
 260         set_format_params(avctx, PIX_FMT_XVMC_MPEG2_IDCT);
 261     }
 262 #endif /* CONFIG_XVMC */
 263     if(ctx->do_dr1){
 264         avctx->flags|= CODEC_FLAG_EMU_EDGE;
 265         avctx->get_buffer= get_buffer;
 266         avctx->release_buffer= release_buffer;
 267         avctx->reget_buffer= get_buffer;
 268     }
 269
 270     avctx->flags|= lavc_param->bitexact;
 271
 272     avctx->width = sh->disp_w;
 273     avctx->height= sh->disp_h;
 274     avctx->workaround_bugs= lavc_param->workaround_bugs;
 275     avctx->error_recognition= lavc_param->error_resilience;
 276     if(lavc_param->gray) avctx->flags|= CODEC_FLAG_GRAY;
 277     avctx->flags2|= lavc_param->fast;
 278     avctx->codec_tag= sh->format;
 279     avctx->stream_codec_tag= sh->video.fccHandler;
 280     avctx->idct_algo= lavc_param->idct_algo;
 281     avctx->error_concealment= lavc_param->error_concealment;
 282     avctx->debug= lavc_param->debug;
 283     if (lavc_param->debug)
 284         av_log_set_level(AV_LOG_DEBUG);
 285     avctx->debug_mv= lavc_param->vismv;
 286     avctx->skip_top   = lavc_param->skip_top;
 287     avctx->skip_bottom= lavc_param->skip_bottom;
 288     if(lavc_param->lowres_str != NULL)
 289     {
 290         sscanf(lavc_param->lowres_str, "%d,%d", &ctx->lowres, &lowres_w);
 291         if(ctx->lowres < 1 || ctx->lowres > 16 || (lowres_w > 0 && avctx->width < lowres_w))
 292             ctx->lowres = 0;
 293         avctx->lowres = ctx->lowres;
 294     }
 295     avctx->skip_loop_filter = str2AVDiscard(lavc_param->skip_loop_filter_str);
 296     avctx->skip_idct = str2AVDiscard(lavc_param->skip_idct_str);
 297     avctx->skip_frame = str2AVDiscard(lavc_param->skip_frame_str);
 298
 299     if(lavc_param->avopt){
 300         if(parse_avopts(avctx, lavc_param->avopt) < 0){
 301             mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", lavc_param->avopt);
 302             uninit(sh);
 303             return 0;
 304         }
 305     }
 306
 307     mp_dbg(MSGT_DECVIDEO, MSGL_DBG2, "libavcodec.size: %d x %d\n", avctx->width, avctx->height);
 308     switch (sh->format) {
 309     case mmioFOURCC('S','V','Q','3'):
 310     /* SVQ3 extradata can show up as sh->ImageDesc if demux_mov is used, or
 311        in the phony AVI header if demux_lavf is used. The first case is
 312        handled here; the second case falls through to the next section. */
 313         if (sh->ImageDesc) {
 314             avctx->extradata_size = (*(int *)sh->ImageDesc) - sizeof(int);
 315             avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 316             memcpy(avctx->extradata, ((int *)sh->ImageDesc)+1, avctx->extradata_size);
 317             break;
 318         }
 319         /* fallthrough */
 320
 321     case mmioFOURCC('A','V','R','n'):
 322     case mmioFOURCC('M','J','P','G'):
 323     /* AVRn stores huffman table in AVI header */
 324     /* Pegasus MJPEG stores it also in AVI header, but it uses the common
 325        MJPG fourcc :( */
 326         if (!sh->bih || sh->bih->biSize <= sizeof(BITMAPINFOHEADER))
 327             break;
 328         avctx->flags |= CODEC_FLAG_EXTERN_HUFF;
 329         avctx->extradata_size = sh->bih->biSize-sizeof(BITMAPINFOHEADER);
 330         avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 331         memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
 332
 333 #if 0
 334         {
 335             int x;
 336             uint8_t *p = avctx->extradata;
 337
 338             for (x=0; x<avctx->extradata_size; x++)
 339                 mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[%x] ", p[x]);
 340             mp_msg(MSGT_DECVIDEO, MSGL_INFO, "\n");
 341         }
 342 #endif
 343         break;
 344
 345     case mmioFOURCC('R', 'V', '1', '0'):
 346     case mmioFOURCC('R', 'V', '1', '3'):
 347     case mmioFOURCC('R', 'V', '2', '0'):
 348     case mmioFOURCC('R', 'V', '3', '0'):
 349     case mmioFOURCC('R', 'V', '4', '0'):
 350         if(sh->bih->biSize<sizeof(*sh->bih)+8){
 351             /* only 1 packet per frame & sub_id from fourcc */
 352             avctx->extradata_size= 8;
 353             avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 354             ((uint32_t *)avctx->extradata)[0] = 0;
 355             ((uint32_t *)avctx->extradata)[1] =
 356                 (sh->format == mmioFOURCC('R', 'V', '1', '3')) ? 0x10003001 : 0x10000000;
 357         } else {
 358             /* has extra slice header (demux_rm or rm->avi streamcopy) */
 359             avctx->extradata_size = sh->bih->biSize-sizeof(BITMAPINFOHEADER);
 360             avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 361             memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
 362         }
 363         avctx->sub_id= AV_RB32(avctx->extradata+4);
 364
 365 //        printf("%X %X %d %d\n", extrahdr[0], extrahdr[1]);
 366         break;
 367
 368     default:
 369         if (!sh->bih || sh->bih->biSize <= sizeof(BITMAPINFOHEADER))
 370             break;
 371         avctx->extradata_size = sh->bih->biSize-sizeof(BITMAPINFOHEADER);
 372         avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 373         memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
 374         break;
 375     }
 376     /* Pass palette to codec */
 377     if (sh->bih && (sh->bih->biBitCount <= 8)) {
 378         avctx->palctrl = calloc(1, sizeof(AVPaletteControl));
 379         avctx->palctrl->palette_changed = 1;
 380         if (sh->bih->biSize-sizeof(BITMAPINFOHEADER))
 381             /* Palette size in biSize */
 382             memcpy(avctx->palctrl->palette, sh->bih+1,
 383                    FFMIN(sh->bih->biSize-sizeof(BITMAPINFOHEADER), AVPALETTE_SIZE));
 384         else
 385             /* Palette size in biClrUsed */
 386             memcpy(avctx->palctrl->palette, sh->bih+1,
 387                    FFMIN(sh->bih->biClrUsed * 4, AVPALETTE_SIZE));
 388         }
 389
 390     if(sh->bih)
 391         avctx->bits_per_coded_sample= sh->bih->biBitCount;
 392
 393     if(lavc_param->threads > 1)
 394         avcodec_thread_init(avctx, lavc_param->threads);
 395     /* open it */
 396     if (avcodec_open(avctx, lavc_codec) < 0) {
 397         mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not open codec.\n");
 398         uninit(sh);
 399         return 0;
 400     }
 401     // this is necessary in case get_format was never called and init_vo is
 402     // too late e.g. for H.264 VDPAU
 403     set_format_params(avctx, avctx->pix_fmt);
 404     mp_msg(MSGT_DECVIDEO, MSGL_V, "INFO: libavcodec init OK!\n");
 405     return 1; //mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, IMGFMT_YV12);
 406 }
 407
 408 // uninit driver
 409 static void uninit(sh_video_t *sh){
 410     vd_ffmpeg_ctx *ctx = sh->context;
 411     AVCodecContext *avctx = ctx->avctx;
 412
 413     if(sh->opts->lavc_param.vstats){
 414         int i;
 415         for(i=1; i<32; i++){
 416             mp_msg(MSGT_DECVIDEO, MSGL_INFO, "QP: %d, count: %d\n", i, ctx->qp_stat[i]);
 417         }
 418         mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] Arithmetic mean of QP: %2.4f, Harmonic mean of QP: %2.4f\n",
 419             ctx->qp_sum / avctx->coded_frame->coded_picture_number,
 420             1.0/(ctx->inv_qp_sum / avctx->coded_frame->coded_picture_number)
 421             );
 422     }
 423
 424     if (avctx) {
 425         if (avctx->codec && avcodec_close(avctx) < 0)
 426             mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not close codec.\n");
 427
 428         av_freep(&avctx->extradata);
 429         av_freep(&avctx->palctrl);
 430         av_freep(&avctx->slice_offset);
 431     }
 432
 433     av_freep(&avctx);
 434     av_freep(&ctx->pic);
 435     if (ctx)
 436         free(ctx);
 437 }
 438
 439 static void draw_slice(struct AVCodecContext *s,
 440                        const AVFrame *src, int offset[4],
 441                        int y, int type, int height){
 442     sh_video_t *sh = s->opaque;
 443     uint8_t *source[MP_MAX_PLANES]= {src->data[0] + offset[0], src->data[1] + offset[1], src->data[2] + offset[2]};
 444 #if 0
 445     int start=0, i;
 446     int width= s->width;
 447     vd_ffmpeg_ctx *ctx = sh->context;
 448     int skip_stride= ((width << ctx->lowres)+15)>>4;
 449     uint8_t *skip= &s->coded_frame->mbskip_table[(y>>4)*skip_stride];
 450     int threshold= s->coded_frame->age;
 451     if(s->pict_type!=B_TYPE){
 452         for(i=0; i*16<width+16; i++){
 453             if(i*16>=width || skip[i]>=threshold){
 454                 if(start==i) start++;
 455                 else{
 456                     uint8_t *src2[3]= {src[0] + start*16,
 457                                      src[1] + start*8,
 458                                      src[2] + start*8};
 459 //printf("%2d-%2d x %d\n", start, i, y);
 460                     mpcodecs_draw_slice (sh, src2, stride, (i-start)*16, height, start*16, y);
 461                     start= i+1;
 462                 }
 463             }
 464         }
 465     }else
 466 #endif
 467     if (y < sh->disp_h) {
 468         mpcodecs_draw_slice (sh, source, src->linesize, sh->disp_w, (y+height)<=sh->disp_h?height:sh->disp_h-y, 0, y);
 469     }
 470 }
 471
 472
 473 static int init_vo(sh_video_t *sh, enum PixelFormat pix_fmt){
 474     vd_ffmpeg_ctx *ctx = sh->context;
 475     AVCodecContext *avctx = ctx->avctx;
 476     float aspect= av_q2d(avctx->sample_aspect_ratio) * avctx->width / avctx->height;
 477     int width, height;
 478
 479     width = avctx->width;
 480     height = avctx->height;
 481
 482     // HACK!
 483     // if sh->ImageDesc is non-NULL, it means we decode QuickTime(tm) video.
 484     // use dimensions from BIH to avoid black borders at the right and bottom.
 485     if (sh->bih && sh->ImageDesc) {
 486         width = sh->bih->biWidth >> ctx->lowres;
 487         height = sh->bih->biHeight >> ctx->lowres;
 488     }
 489
 490      // it is possible another vo buffers to be used after vo config()
 491      // lavc reset its buffers on width/heigh change but not on aspect change!!!
 492     if (av_cmp_q(avctx->sample_aspect_ratio, ctx->last_sample_aspect_ratio) ||
 493         width != sh->disp_w  ||
 494         height != sh->disp_h ||
 495         pix_fmt != ctx->pix_fmt ||
 496         !ctx->vo_initialized)
 497     {
 498         // this is a special-case HACK for MPEG-1/2 VDPAU that uses neither get_format nor
 499         // sets the value correctly in avcodec_open.
 500         set_format_params(avctx, avctx->pix_fmt);
 501         mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", aspect);
 502         if (sh->aspect == 0 ||
 503             av_cmp_q(avctx->sample_aspect_ratio,
 504                      ctx->last_sample_aspect_ratio))
 505             sh->aspect = aspect;
 506         ctx->last_sample_aspect_ratio = avctx->sample_aspect_ratio;
 507         sh->disp_w = width;
 508         sh->disp_h = height;
 509         ctx->pix_fmt = pix_fmt;
 510         ctx->best_csp = pixfmt2imgfmt(pix_fmt);
 511         if (!mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, ctx->best_csp))
 512             return -1;
 513         ctx->vo_initialized = 1;
 514     }
 515     return 0;
 516 }
 517
 518 static int get_buffer(AVCodecContext *avctx, AVFrame *pic){
 519     sh_video_t *sh = avctx->opaque;
 520     vd_ffmpeg_ctx *ctx = sh->context;
 521     mp_image_t *mpi=NULL;
 522     int flags= MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE;
 523     int type= MP_IMGTYPE_IPB;
 524     int width= avctx->width;
 525     int height= avctx->height;
 526     int align=15;
 527 //printf("get_buffer %d %d %d\n", pic->reference, ctx->ip_count, ctx->b_count);
 528     if(avctx->pix_fmt == PIX_FMT_YUV410P)
 529         align=63; //yes seriously, its really needed (16x16 chroma blocks in SVQ1 -> 64x64)
 530
 531     if (pic->buffer_hints) {
 532         mp_msg(MSGT_DECVIDEO, MSGL_DBG2, "Buffer hints: %u\n", pic->buffer_hints);
 533         type = MP_IMGTYPE_TEMP;
 534         if (pic->buffer_hints & FF_BUFFER_HINTS_READABLE)
 535             flags |= MP_IMGFLAG_READABLE;
 536         if (pic->buffer_hints & FF_BUFFER_HINTS_PRESERVE) {
 537             type = MP_IMGTYPE_STATIC;
 538             flags |= MP_IMGFLAG_PRESERVE;
 539         }
 540         if (pic->buffer_hints & FF_BUFFER_HINTS_REUSABLE) {
 541             type = MP_IMGTYPE_STATIC;
 542             flags |= MP_IMGFLAG_PRESERVE;
 543         }
 544         flags|=(!avctx->hurry_up && ctx->do_slices) ?
 545                  MP_IMGFLAG_DRAW_CALLBACK:0;
 546         mp_msg(MSGT_DECVIDEO, MSGL_DBG2, type == MP_IMGTYPE_STATIC ? "using STATIC\n" : "using TEMP\n");
 547     } else {
 548         if(!pic->reference){
 549             ctx->b_count++;
 550             flags|=(!avctx->hurry_up && ctx->do_slices) ?
 551                      MP_IMGFLAG_DRAW_CALLBACK:0;
 552         }else{
 553             ctx->ip_count++;
 554             flags|= MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE
 555                       | (ctx->do_slices ? MP_IMGFLAG_DRAW_CALLBACK : 0);
 556         }
 557     }
 558
 559     if(init_vo(sh, avctx->pix_fmt) < 0){
 560         avctx->release_buffer= avcodec_default_release_buffer;
 561         avctx->get_buffer= avcodec_default_get_buffer;
 562         return avctx->get_buffer(avctx, pic);
 563     }
 564
 565     if (IMGFMT_IS_XVMC(ctx->best_csp) || IMGFMT_IS_VDPAU(ctx->best_csp)) {
 566         type =  MP_IMGTYPE_NUMBERED | (0xffff << 16);
 567     } else
 568     if (!pic->buffer_hints) {
 569         if(ctx->b_count>1 || ctx->ip_count>2){
 570             mp_tmsg(MSGT_DECVIDEO, MSGL_WARN, "[VD_FFMPEG] DRI failure.\n");
 571
 572             ctx->do_dr1=0; //FIXME
 573             avctx->get_buffer= avcodec_default_get_buffer;
 574             return avctx->get_buffer(avctx, pic);
 575         }
 576
 577         if(avctx->has_b_frames){
 578             type= MP_IMGTYPE_IPB;
 579         }else{
 580             type= MP_IMGTYPE_IP;
 581         }
 582         mp_msg(MSGT_DECVIDEO, MSGL_DBG2, type== MP_IMGTYPE_IPB ? "using IPB\n" : "using IP\n");
 583     }
 584
 585     mpi= mpcodecs_get_image(sh, type, flags,
 586                         (width+align)&(~align), (height+align)&(~align));
 587     if (!mpi) return -1;
 588
 589     // ok, let's see what did we get:
 590     if(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK &&
 591        !(mpi->flags&MP_IMGFLAG_DIRECT)){
 592         // nice, filter/vo likes draw_callback :)
 593         avctx->draw_horiz_band= draw_slice;
 594     } else
 595         avctx->draw_horiz_band= NULL;
 596     if(IMGFMT_IS_VDPAU(mpi->imgfmt)) {
 597         avctx->draw_horiz_band= draw_slice;
 598     }
 599 #if CONFIG_XVMC
 600     if(IMGFMT_IS_XVMC(mpi->imgfmt)) {
 601         struct xvmc_pix_fmt *render = mpi->priv; //same as data[2]
 602         avctx->draw_horiz_band= draw_slice;
 603         if(!avctx->xvmc_acceleration) {
 604             mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] The mc_get_buffer should work only with XVMC acceleration!!");
 605             assert(0);
 606             exit(1);
 607 //            return -1;//!!fixme check error conditions in ffmpeg
 608         }
 609         if(!(mpi->flags & MP_IMGFLAG_DIRECT)) {
 610             mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "[VD_FFMPEG] Only buffers allocated by vo_xvmc allowed.\n");
 611             assert(0);
 612             exit(1);
 613 //            return -1;//!!fixme check error conditions in ffmpeg
 614         }
 615         if(mp_msg_test(MSGT_DECVIDEO, MSGL_DBG5))
 616             mp_msg(MSGT_DECVIDEO, MSGL_DBG5, "vd_ffmpeg::get_buffer (xvmc render=%p)\n", render);
 617         assert(render != 0);
 618         assert(render->xvmc_id == AV_XVMC_ID);
 619         render->state |= AV_XVMC_STATE_PREDICTION;
 620     }
 621 #endif
 622
 623     // Palette support: libavcodec copies palette to *data[1]
 624     if (mpi->bpp == 8)
 625         mpi->planes[1] = av_malloc(AVPALETTE_SIZE);
 626
 627     pic->data[0]= mpi->planes[0];
 628     pic->data[1]= mpi->planes[1];
 629     pic->data[2]= mpi->planes[2];
 630
 631 #if 0
 632     assert(mpi->width >= ((width +align)&(~align)));
 633     assert(mpi->height >= ((height+align)&(~align)));
 634     assert(mpi->stride[0] >= mpi->width);
 635     if(mpi->imgfmt==IMGFMT_I420 || mpi->imgfmt==IMGFMT_YV12 || mpi->imgfmt==IMGFMT_IYUV){
 636         const int y_size= mpi->stride[0] * (mpi->h-1) + mpi->w;
 637         const int c_size= mpi->stride[1] * ((mpi->h>>1)-1) + (mpi->w>>1);
 638
 639         assert(mpi->planes[0] > mpi->planes[1] || mpi->planes[0] + y_size <= mpi->planes[1]);
 640         assert(mpi->planes[0] > mpi->planes[2] || mpi->planes[0] + y_size <= mpi->planes[2]);
 641         assert(mpi->planes[1] > mpi->planes[0] || mpi->planes[1] + c_size <= mpi->planes[0]);
 642         assert(mpi->planes[1] > mpi->planes[2] || mpi->planes[1] + c_size <= mpi->planes[2]);
 643         assert(mpi->planes[2] > mpi->planes[0] || mpi->planes[2] + c_size <= mpi->planes[0]);
 644         assert(mpi->planes[2] > mpi->planes[1] || mpi->planes[2] + c_size <= mpi->planes[1]);
 645     }
 646 #endif
 647
 648     /* Note, some (many) codecs in libavcodec must have stride1==stride2 && no changes between frames
 649      * lavc will check that and die with an error message, if its not true
 650      */
 651     pic->linesize[0]= mpi->stride[0];
 652     pic->linesize[1]= mpi->stride[1];
 653     pic->linesize[2]= mpi->stride[2];
 654
 655     pic->opaque = mpi;
 656 //printf("%X\n", (int)mpi->planes[0]);
 657 #if 0
 658 if(mpi->flags&MP_IMGFLAG_DIRECT)
 659     printf("D");
 660 else if(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)
 661     printf("S");
 662 else
 663     printf(".");
 664 #endif
 665     if(pic->reference){
 666         pic->age= ctx->ip_age[0];
 667
 668         ctx->ip_age[0]= ctx->ip_age[1]+1;
 669         ctx->ip_age[1]= 1;
 670         ctx->b_age++;
 671     }else{
 672         pic->age= ctx->b_age;
 673
 674         ctx->ip_age[0]++;
 675         ctx->ip_age[1]++;
 676         ctx->b_age=1;
 677     }
 678     pic->type= FF_BUFFER_TYPE_USER;
 679     return 0;
 680 }
 681
 682 static void release_buffer(struct AVCodecContext *avctx, AVFrame *pic){
 683     mp_image_t *mpi= pic->opaque;
 684     sh_video_t *sh = avctx->opaque;
 685     vd_ffmpeg_ctx *ctx = sh->context;
 686     int i;
 687
 688 //printf("release buffer %d %d %d\n", mpi ? mpi->flags&MP_IMGFLAG_PRESERVE : -99, ctx->ip_count, ctx->b_count);
 689
 690     if(ctx->ip_count <= 2 && ctx->b_count<=1){
 691         if(mpi->flags&MP_IMGFLAG_PRESERVE)
 692             ctx->ip_count--;
 693         else
 694             ctx->b_count--;
 695     }
 696
 697     if (mpi) {
 698         // Palette support: free palette buffer allocated in get_buffer
 699         if (mpi->bpp == 8)
 700             av_freep(&mpi->planes[1]);
 701 #if CONFIG_XVMC
 702         if (IMGFMT_IS_XVMC(mpi->imgfmt)) {
 703             struct xvmc_pix_fmt *render = (struct xvmc_pix_fmt*)pic->data[2]; //same as mpi->priv
 704             if(mp_msg_test(MSGT_DECVIDEO, MSGL_DBG5))
 705                 mp_msg(MSGT_DECVIDEO, MSGL_DBG5, "vd_ffmpeg::release_buffer (xvmc render=%p)\n", render);
 706             assert(render!=NULL);
 707             assert(render->xvmc_id == AV_XVMC_ID);
 708             render->state&=~AV_XVMC_STATE_PREDICTION;
 709         }
 710 #endif
 711         // release mpi (in case MPI_IMGTYPE_NUMBERED is used, e.g. for VDPAU)
 712         mpi->usage_count--;
 713     }
 714
 715     if(pic->type!=FF_BUFFER_TYPE_USER){
 716         avcodec_default_release_buffer(avctx, pic);
 717         return;
 718     }
 719
 720     for(i=0; i<4; i++){
 721         pic->data[i]= NULL;
 722     }
 723 //printf("R%X %X\n", pic->linesize[0], pic->data[0]);
 724 }
 725
 726 // copypaste from demux_real.c - it should match to get it working!
 727 //FIXME put into some header
 728 typedef struct dp_hdr_s {
 729     uint32_t chunks;        // number of chunks
 730     uint32_t timestamp; // timestamp from packet header
 731     uint32_t len;        // length of actual data
 732     uint32_t chunktab;        // offset to chunk offset array
 733 } dp_hdr_t;
 734
 735 static void swap_palette(void *pal) {
 736     int i;
 737     uint32_t *p = pal;
 738     for (i = 0; i < AVPALETTE_COUNT; i++)
 739         p[i] = le2me_32(p[i]);
 740 }
 741
 742 // decode a frame
 743 static mp_image_t *decode(sh_video_t *sh, void *data, int len, int flags){
 744     int got_picture=0;
 745     int ret;
 746     vd_ffmpeg_ctx *ctx = sh->context;
 747     AVFrame *pic= ctx->pic;
 748     AVCodecContext *avctx = ctx->avctx;
 749     struct lavc_param *lavc_param = &sh->opts->lavc_param;
 750     mp_image_t *mpi=NULL;
 751     int dr1= ctx->do_dr1;
 752
 753     if(len<=0) return NULL; // skipped frame
 754
 755 //ffmpeg interlace (mpeg2) bug have been fixed. no need of -noslices
 756     if (!dr1)
 757     avctx->draw_horiz_band=NULL;
 758     if(ctx->vo_initialized && !(flags&3) && !dr1){
 759         mpi=mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, MP_IMGFLAG_PRESERVE |
 760             (ctx->do_slices?MP_IMGFLAG_DRAW_CALLBACK:0),
 761             sh->disp_w, sh->disp_h);
 762         if(mpi && mpi->flags&MP_IMGFLAG_DRAW_CALLBACK){
 763             // vd core likes slices!
 764             avctx->draw_horiz_band=draw_slice;
 765         }
 766     }
 767
 768     avctx->hurry_up=(flags&3)?((flags&2)?2:1):0;
 769
 770     mp_msg(MSGT_DECVIDEO, MSGL_DBG2, "vd_ffmpeg data: %04x, %04x, %04x, %04x\n",
 771            ((int *)data)[0], ((int *)data)[1], ((int *)data)[2], ((int *)data)[3]);
 772     ret = avcodec_decode_video(avctx, pic,
 773              &got_picture, data, len);
 774
 775     dr1= ctx->do_dr1;
 776     if(ret<0) mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Error while decoding frame!\n");
 777 //printf("repeat: %d\n", pic->repeat_pict);
 778 //-- vstats generation
 779     while(lavc_param->vstats){ // always one time loop
 780         static FILE *fvstats=NULL;
 781         char filename[20];
 782         static long long int all_len=0;
 783         static int frame_number=0;
 784         static double all_frametime=0.0;
 785         AVFrame *pic= avctx->coded_frame;
 786         double quality=0.0;
 787
 788         if(!fvstats) {
 789             time_t today2;
 790             struct tm *today;
 791             today2 = time(NULL);
 792             today = localtime(&today2);
 793             sprintf(filename, "vstats_%02d%02d%02d.log", today->tm_hour,
 794                 today->tm_min, today->tm_sec);
 795             fvstats = fopen(filename, "w");
 796             if(!fvstats) {
 797                 perror("fopen");
 798                 lavc_param->vstats=0; // disable block
 799                 break;
 800                 /*exit(1);*/
 801             }
 802         }
 803
 804         // average MB quantizer
 805         {
 806             int x, y;
 807             int w = ((avctx->width  << ctx->lowres)+15) >> 4;
 808             int h = ((avctx->height << ctx->lowres)+15) >> 4;
 809             int8_t *q = pic->qscale_table;
 810             for(y = 0; y < h; y++) {
 811                 for(x = 0; x < w; x++)
 812                     quality += (double)*(q+x);
 813                 q += pic->qstride;
 814             }
 815             quality /= w * h;
 816         }
 817
 818         all_len+=len;
 819         all_frametime+=sh->frametime;
 820         fprintf(fvstats, "frame= %5d q= %2.2f f_size= %6d s_size= %8.0fkB ",
 821             ++frame_number, quality, len, (double)all_len/1024);
 822         fprintf(fvstats, "time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
 823            all_frametime, (double)(len*8)/sh->frametime/1000.0,
 824            (double)(all_len*8)/all_frametime/1000.0);
 825         switch(pic->pict_type){
 826         case FF_I_TYPE:
 827             fprintf(fvstats, "type= I\n");
 828             break;
 829         case FF_P_TYPE:
 830             fprintf(fvstats, "type= P\n");
 831             break;
 832         case FF_S_TYPE:
 833             fprintf(fvstats, "type= S\n");
 834             break;
 835         case FF_B_TYPE:
 836             fprintf(fvstats, "type= B\n");
 837             break;
 838         default:
 839             fprintf(fvstats, "type= ? (%d)\n", pic->pict_type);
 840             break;
 841         }
 842
 843         ctx->qp_stat[(int)(quality+0.5)]++;
 844         ctx->qp_sum += quality;
 845         ctx->inv_qp_sum += 1.0/(double)quality;
 846
 847         break;
 848     }
 849 //--
 850
 851     if(!got_picture) return NULL;        // skipped image
 852
 853     if(init_vo(sh, avctx->pix_fmt) < 0) return NULL;
 854
 855     if(dr1 && pic->opaque){
 856         mpi= (mp_image_t *)pic->opaque;
 857     }
 858
 859     if(!mpi)
 860     mpi=mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, MP_IMGFLAG_PRESERVE,
 861         avctx->width, avctx->height);
 862     if(!mpi){        // temporary!
 863         mp_tmsg(MSGT_DECVIDEO, MSGL_WARN, "[VD_FFMPEG] Couldn't allocate image for codec.\n");
 864         return NULL;
 865     }
 866
 867     if(!dr1){
 868         mpi->planes[0]=pic->data[0];
 869         mpi->planes[1]=pic->data[1];
 870         mpi->planes[2]=pic->data[2];
 871         mpi->stride[0]=pic->linesize[0];
 872         mpi->stride[1]=pic->linesize[1];
 873         mpi->stride[2]=pic->linesize[2];
 874     }
 875
 876     if (!mpi->planes[0])
 877         return NULL;
 878
 879     if(avctx->pix_fmt==PIX_FMT_YUV422P && mpi->chroma_y_shift==1){
 880         // we have 422p but user wants 420p
 881         mpi->stride[1]*=2;
 882         mpi->stride[2]*=2;
 883     }
 884
 885 #ifdef WORDS_BIGENDIAN
 886     // FIXME: this might cause problems for buffers with FF_BUFFER_HINTS_PRESERVE
 887     if (mpi->bpp == 8)
 888         swap_palette(mpi->planes[1]);
 889 #endif
 890 /* to comfirm with newer lavc style */
 891     mpi->qscale =pic->qscale_table;
 892     mpi->qstride=pic->qstride;
 893     mpi->pict_type=pic->pict_type;
 894     mpi->qscale_type= pic->qscale_type;
 895     mpi->fields = MP_IMGFIELD_ORDERED;
 896     if(pic->interlaced_frame) mpi->fields |= MP_IMGFIELD_INTERLACED;
 897     if(pic->top_field_first ) mpi->fields |= MP_IMGFIELD_TOP_FIRST;
 898     if(pic->repeat_pict == 1) mpi->fields |= MP_IMGFIELD_REPEAT_FIRST;
 899
 900     return mpi;
 901 }
 902
 903 #if CONFIG_XVMC || CONFIG_VDPAU
 904 static enum PixelFormat get_format(struct AVCodecContext *avctx,
 905                                     const enum PixelFormat *fmt){
 906     enum PixelFormat selected_format;
 907     int imgfmt;
 908     sh_video_t *sh = avctx->opaque;
 909     int i;
 910
 911     for(i=0;fmt[i]!=PIX_FMT_NONE;i++){
 912         imgfmt = pixfmt2imgfmt(fmt[i]);
 913         if(!IMGFMT_IS_XVMC(imgfmt) && !IMGFMT_IS_VDPAU(imgfmt)) continue;
 914         mp_tmsg(MSGT_DECVIDEO, MSGL_INFO, "[VD_FFMPEG] Trying pixfmt=%d.\n", i);
 915         if(init_vo(sh, fmt[i]) >= 0) {
 916             break;
 917         }
 918     }
 919     selected_format = fmt[i];
 920     set_format_params(avctx, selected_format);
 921     return selected_format;
 922 }
 923 #endif /* CONFIG_XVMC || CONFIG_VDPAU */