[RFC] Split out hwaccel code

/*
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <assert.h>
#include <time.h>

#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "av_opts.h"
#include "av_helpers.h"

#include "libavutil/common.h"
#include "libavutil/dict.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "fmt-conversion.h"

#include "vd_internal.h"

#if CONFIG_VDPAU
#include "libavcodec/vdpau.h"
#include "vdpau_frame_data.h"
#endif
#include "libavutil/pixdesc.h"

static const vd_info_t info = {
    "FFmpeg's libavcodec hardware codec family",
    "ffhw",
    "A'rpi",
    "A'rpi, Michael, Alex",
    "native codecs"
};

LIBVD_EXTERN(ffhw)

#include "libavcodec/avcodec.h"

#if CONFIG_XVMC
#include "libavcodec/xvmc.h"
#endif

typedef struct {
    AVCodecContext *avctx;
    AVFrame *pic;
    AVFrame *refcount_frame;
    enum AVPixelFormat pix_fmt;
    int do_slices;
    int vo_initialized;
    int best_csp;
    AVRational last_sample_aspect_ratio;
    int use_vdpau;
} vd_ffmpeg_ctx;

#include "m_option.h"

static int get_buffer_hw(AVCodecContext *avctx, AVFrame *frame, int flags);
static void release_buffer_hw(void *opaque, uint8_t *data);
static void draw_slice(struct AVCodecContext *s, const AVFrame *src, int offset[4],
                       int y, int type, int height);

static enum AVPixelFormat get_format(struct AVCodecContext *avctx,
                                     const enum AVPixelFormat *pix_fmt);

static int lavc_param_workaround_bugs= FF_BUG_AUTODETECT;
static int lavc_param_debug=0;
static char *lavc_avopt = NULL;

static const mp_image_t mpi_no_picture =
{
	.type = MP_IMGTYPE_INCOMPLETE
};

const m_option_t lavc_hwdecode_opts_conf[]={
    {"bug"           , &lavc_param_workaround_bugs      , CONF_TYPE_INT     , CONF_RANGE, -1, 999999, NULL},
    {"debug"         , &lavc_param_debug                , CONF_TYPE_INT     , CONF_RANGE, 0, 9999999, NULL},
    {"o"             , &lavc_avopt                      , CONF_TYPE_STRING  , 0, 0, 0, NULL},
    {NULL, NULL, 0, 0, 0, 0, NULL}
};

// to set/get/query special features/parameters
static int control(sh_video_t *sh, int cmd, void *arg, ...){
    vd_ffmpeg_ctx *ctx = sh->context;
    AVCodecContext *avctx = ctx->avctx;
    switch(cmd){
    case VDCTRL_QUERY_FORMAT:
    {
        int format =(*((int *)arg));
        if(format == ctx->best_csp) return CONTROL_TRUE;//supported
        // possible conversions:
        switch(format){
#if CONFIG_XVMC
        case IMGFMT_XVMC_IDCT_MPEG2:
        case IMGFMT_XVMC_MOCO_MPEG2:
            if(avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT) return CONTROL_TRUE;
#endif
        }
        return CONTROL_FALSE;
    }
    case VDCTRL_RESYNC_STREAM:
        avcodec_flush_buffers(avctx);
        return CONTROL_TRUE;
    case VDCTRL_QUERY_UNSEEN_FRAMES:
        // "has_b_frames" contains the (e.g. reorder) delay as specified
        // in the standard. "delay" contains the libavcodec-specific delay
        // e.g. due to frame multithreading
        return avctx->has_b_frames + avctx->delay + 10;
    }
    return CONTROL_UNKNOWN;
}

#if CONFIG_VDPAU
static int vdpau_render_wrapper(AVCodecContext *s, AVFrame *f,
    const VdpPictureInfo *info, uint32_t count, const VdpBitstreamBuffer *buffers)
{
    mp_image_t *mpi = f->opaque;
    sh_video_t *sh = s->opaque;
    struct vdpau_frame_data data;
    uint8_t *planes[4] = {(void *)&data};
    data.surface = (VdpVideoSurface)mpi->priv;
    data.info = info;
    data.bitstream_buffers_used = count;
    data.bitstream_buffers = buffers;
    mpcodecs_draw_slice(sh, planes, NULL, sh->disp_w, sh->disp_h, 0, 0);
    return 0;
}
#endif

static int pixfmt2imgfmt2(enum AVPixelFormat fmt, enum AVCodecID cid)
{
    if (fmt == AV_PIX_FMT_VDPAU)
        switch (cid) {
        case AV_CODEC_ID_H264:       return IMGFMT_VDPAU_H264;
        case AV_CODEC_ID_MPEG1VIDEO: return IMGFMT_VDPAU_MPEG1;
        case AV_CODEC_ID_MPEG2VIDEO: return IMGFMT_VDPAU_MPEG2;
        case AV_CODEC_ID_MPEG4:      return IMGFMT_VDPAU_MPEG4;
        case AV_CODEC_ID_WMV3:       return IMGFMT_VDPAU_WMV3;
        case AV_CODEC_ID_VC1:        return IMGFMT_VDPAU_VC1;
        case AV_CODEC_ID_HEVC:       return IMGFMT_VDPAU_HEVC;
        }
    return pixfmt2imgfmt(fmt);
}


static void set_format_params(struct AVCodecContext *avctx,
                              enum AVPixelFormat fmt)
{
    sh_video_t *sh     = avctx->opaque;
    vd_ffmpeg_ctx *ctx = sh->context;
    int imgfmt;
    if (fmt == AV_PIX_FMT_NONE)
        return;
    ctx->use_vdpau = fmt == AV_PIX_FMT_VDPAU;
    imgfmt = pixfmt2imgfmt2(fmt, avctx->codec_id);
#if CONFIG_VDPAU
    if (!ctx->use_vdpau) {
        av_freep(&avctx->hwaccel_context);
    } else {
        AVVDPAUContext *vdpc = avctx->hwaccel_context;
        if (!vdpc)
            avctx->hwaccel_context = vdpc = av_alloc_vdpaucontext();
        vdpc->render2 = vdpau_render_wrapper;
    }
#endif
        avctx->get_buffer2 = get_buffer_hw;
        mp_msg(MSGT_DECVIDEO, MSGL_V, IMGFMT_IS_XVMC(imgfmt) ?
               MSGTR_MPCODECS_XVMCAcceleratedMPEG2 :
               "[VD_FFMPEG] VDPAU accelerated decoding\n");
        if (ctx->use_vdpau) {
            avctx->draw_horiz_band = NULL;
            avctx->slice_flags = 0;
            ctx->do_slices = 0;
        } else {
            avctx->draw_horiz_band = draw_slice;
            avctx->slice_flags = SLICE_FLAG_CODED_ORDER|SLICE_FLAG_ALLOW_FIELD;
            ctx->do_slices = 1;
        }
}

// init driver
static int init(sh_video_t *sh){
    AVCodecContext *avctx;
    vd_ffmpeg_ctx *ctx;
    AVCodec *lavc_codec;
    AVDictionary *opts = NULL;

    init_avcodec();

    ctx = sh->context = calloc(1, sizeof(*ctx));
    if (!ctx)
        return 0;

    lavc_codec = avcodec_find_decoder_by_name(codec_idx2str(sh->codec->dll_idx));
    if(!lavc_codec){
        mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_MissingLAVCcodec, codec_idx2str(sh->codec->dll_idx));
        uninit(sh);
        return 0;
    }

    ctx->pic = av_frame_alloc();
    ctx->avctx = avcodec_alloc_context3(lavc_codec);
    avctx = ctx->avctx;
    avctx->opaque = sh;
    avctx->codec_id = lavc_codec->id;

    avctx->get_format = get_format;

    avctx->coded_width = sh->disp_w;
    avctx->coded_height= sh->disp_h;
    avctx->workaround_bugs= lavc_param_workaround_bugs;
    avctx->codec_tag= sh->format;
    avctx->debug= lavc_param_debug;
    if (lavc_param_debug)
        av_log_set_level(AV_LOG_DEBUG);
    av_opt_set_int(avctx, "skip_alpha", 1, 0);

    if(lavc_avopt){
        if (parse_avopts(avctx, lavc_avopt) < 0 &&
            (!lavc_codec->priv_class ||
             parse_avopts(avctx->priv_data, lavc_avopt) < 0)) {
            mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", lavc_avopt);
            uninit(sh);
            return 0;
        }
    }

    mp_dbg(MSGT_DECVIDEO, MSGL_DBG2, "libavcodec.size: %d x %d\n", avctx->width, avctx->height);

    if (sh->bih && sh->bih->biSize > sizeof(*sh->bih)) {
        avctx->extradata_size = sh->bih->biSize-sizeof(*sh->bih);
        avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
        memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
    }

    if(sh->bih)
        avctx->bits_per_coded_sample= sh->bih->biBitCount;

    avctx->thread_count = 1;
    avctx->refcounted_frames = 1;

    /* open it */
    if (avcodec_open2(avctx, lavc_codec, &opts) < 0) {
        mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_CantOpenCodec);
        uninit(sh);
        return 0;
    }
    av_dict_free(&opts);
    // this is necessary in case get_format was never called and init_vo is
    // too late e.g. for H.264 VDPAU
    set_format_params(avctx, avctx->pix_fmt);
    mp_msg(MSGT_DECVIDEO, MSGL_V, "INFO: libavcodec init OK!\n");
    return 1; //mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, IMGFMT_YV12);
}

// uninit driver
static void uninit(sh_video_t *sh){
    vd_ffmpeg_ctx *ctx = sh->context;
    AVCodecContext *avctx = ctx->avctx;

    if (ctx->refcount_frame) {
        av_frame_unref(ctx->refcount_frame);
        ctx->refcount_frame = NULL;
    }

    if (avctx) {
        if (avctx->codec && avcodec_close(avctx) < 0)
            mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_CantCloseCodec);

        av_freep(&avctx->extradata);
        av_freep(&avctx->hwaccel_context);
        av_freep(&avctx->slice_offset);
    }

    avcodec_free_context(&avctx);
    av_frame_free(&ctx->pic);
    free(ctx);
}

static void draw_slice(struct AVCodecContext *s,
                        const AVFrame *src, int offset[4],
                        int y, int type, int height){
    mp_image_t *mpi = src->opaque;
    sh_video_t *sh = s->opaque;
    vd_ffmpeg_ctx *ctx = sh->context;
    uint8_t *source[MP_MAX_PLANES]= {src->data[0] + offset[0], src->data[1] + offset[1], src->data[2] + offset[2]};
    int strides[MP_MAX_PLANES] = {src->linesize[0], src->linesize[1], src->linesize[2]};
    if (!src->data[0]) {
        mp_msg(MSGT_DECVIDEO, MSGL_FATAL, "BUG in FFmpeg, draw_slice called with NULL pointer!\n");
        return;
    }
    if (mpi && ctx->use_vdpau) {
        mp_msg(MSGT_DECVIDEO, MSGL_FATAL, "BUG in FFmpeg, draw_slice called for VDPAU!\n");
        return;
    }
/*    if (height < 0)
    {
        int i;
        height = -height;
        y -= height;
        for (i = 0; i < MP_MAX_PLANES; i++)
        {
            strides[i] = -strides[i];
            source[i] -= strides[i];
        }
    }*/
    if (y < sh->disp_h) {
        height = FFMIN(height, sh->disp_h-y);
        mpcodecs_draw_slice (sh, source, strides, sh->disp_w, height, 0, y);
    }
}

// ignore_aspect is used to not bother with aspect changes during get_buffer.
// The aspect can be wrong when get_buffer is called before decoding and it
// should simply not be necessary.
// In particular this stops spurious get_buffer aspect values from causing
// a container value to be overwritten.
static void update_configuration(sh_video_t *sh, enum AVPixelFormat pix_fmt, int ignore_aspect) {
    vd_ffmpeg_ctx *ctx = sh->context;
    AVCodecContext *avctx = ctx->avctx;
    int aspect_change = av_cmp_q(avctx->sample_aspect_ratio, ctx->last_sample_aspect_ratio);
    if (!avctx->sample_aspect_ratio.den) {
        mp_msg(MSGT_DECVIDEO, MSGL_WARN, "FFmpeg bug: Invalid aspect\n");
        avctx->sample_aspect_ratio.den = 1;
    }
     // it is possible another vo buffers to be used after vo config()
     // lavc reset its buffers on width/heigh change but not on aspect change!!!
    if ((!ignore_aspect && aspect_change) ||
        pix_fmt != ctx->pix_fmt ||
        !ctx->vo_initialized)
    {
        float aspect= av_q2d(avctx->sample_aspect_ratio) * avctx->width / avctx->height;
        ctx->vo_initialized = 0;
        // this is a special-case HACK for MPEG-1/2 VDPAU that uses neither get_format nor
        // sets the value correctly in avcodec_open.
        set_format_params(avctx, pix_fmt);

        if (!ignore_aspect) {
            mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", aspect);

            // Do not overwrite sh->original_aspect on the first call,
            // if a container aspect is available (which is preferred then).
            // But set it even if the sample aspect did not change, since a
            // resolution change can cause an aspect change even if the
            // _sample_ aspect is unchanged.
            if (sh->original_aspect == 0 || (aspect_change && ctx->last_sample_aspect_ratio.den))
                sh->original_aspect = aspect;
            ctx->last_sample_aspect_ratio = avctx->sample_aspect_ratio;
        }
        ctx->pix_fmt = pix_fmt;
        ctx->best_csp = pixfmt2imgfmt2(pix_fmt, avctx->codec_id);
    }
}

static int is_in_format_list(sh_video_t *sh, int imgfmt)
{
    int i;
    for (i = 0; i < CODECS_MAX_OUTFMT; i++)
        if (sh->codec->outfmt[i] == imgfmt)
            return 1;
    return 0;
}

static int init_vo(sh_video_t *sh, enum AVPixelFormat pix_fmt, int ignore_aspect)
{
    vd_ffmpeg_ctx *ctx = sh->context;
    const AVCodecContext *avctx = ctx->avctx;
    int width, height;
    int imgfmt = pixfmt2imgfmt2(pix_fmt, avctx->codec_id);

    // avoid initialization for formats not on the supported
    // list in the codecs.conf entry.
    if (!is_in_format_list(sh, imgfmt)) {
        if (imgfmt)
            mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Unexpected decoder output format %s\n",
                   vo_format_name(imgfmt));
        return -1;
    }

    width = avctx->width;
    height = avctx->height;

    // HACK!
    // if sh->ImageDesc is non-NULL, it means we decode QuickTime(tm) video.
    // use dimensions from BIH to avoid black borders at the right and bottom.
    if (sh->bih && sh->ImageDesc) {
        width = sh->bih->biWidth;
        height = sh->bih->biHeight;
    }
    if (width != sh->disp_w  || height != sh->disp_h)
        ctx->vo_initialized = 0;

    update_configuration(sh, pix_fmt, ignore_aspect);
    if (!ctx->vo_initialized)
    {
        sh->disp_w = width;
        sh->disp_h = height;
        if (!mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, ctx->best_csp))
            return -1;
        ctx->vo_initialized = 1;
    }
    return 0;
}

static int get_buffer_hw(AVCodecContext *avctx, AVFrame *pic, int isreference){
    sh_video_t *sh = avctx->opaque;
    vd_ffmpeg_ctx *ctx = sh->context;
    mp_image_t *mpi=NULL;
    int flags= MP_IMGFLAG_ACCEPT_ALIGNED_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE;
    int type= MP_IMGTYPE_NUMBERED;
    int width = FFMAX(avctx->width,  -(-avctx->coded_width  >> avctx->lowres));
    int height= FFMAX(avctx->height, -(-avctx->coded_height >> avctx->lowres));

    avcodec_align_dimensions(avctx, &width, &height);
//printf("get_buffer %d %d %d\n", pic->reference, ctx->ip_count, ctx->b_count);

        if(!(isreference & AV_GET_BUFFER_FLAG_REF)){
            flags|=(avctx->skip_idct<=AVDISCARD_DEFAULT && avctx->skip_frame<=AVDISCARD_DEFAULT && ctx->do_slices) ?
                     MP_IMGFLAG_DRAW_CALLBACK:0;
        }else{
            flags|= MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE
                      | (ctx->do_slices ? MP_IMGFLAG_DRAW_CALLBACK : 0);
        }

    if(init_vo(sh, avctx->pix_fmt, 1) < 0){
        return -1;
    }

    mpi= mpcodecs_get_image(sh, type, flags, width, height);
    if (!mpi) return -1;

#if CONFIG_VDPAU
    if (ctx->use_vdpau) {
        VdpVideoSurface surface = (VdpVideoSurface)mpi->priv;
        avctx->draw_horiz_band= NULL;
        mpi->planes[3] = surface;
    }
#endif
#if CONFIG_XVMC
    if(IMGFMT_IS_XVMC(mpi->imgfmt)) {
        struct xvmc_pix_fmt *render = mpi->priv; //same as data[2]
        if(!(mpi->flags & MP_IMGFLAG_DIRECT)) {
            mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_MPCODECS_OnlyBuffersAllocatedByVoXvmcAllowed);
            assert(0);
            return -1;//!!fixme check error conditions in ffmpeg
        }
        if(mp_msg_test(MSGT_DECVIDEO, MSGL_DBG5))
            mp_msg(MSGT_DECVIDEO, MSGL_DBG5, "vd_ffmpeg::get_buffer (xvmc render=%p)\n", render);
        assert(render != 0);
        assert(render->xvmc_id == AV_XVMC_ID);
        avctx->draw_horiz_band= draw_slice;
    }
#endif

    pic->data[0]= mpi->planes[0];
    pic->data[1]= mpi->planes[1];
    pic->data[2]= mpi->planes[2];
    pic->data[3]= mpi->planes[3];

    /* Note, some (many) codecs in libavcodec must have stride1==stride2 && no changes between frames
     * lavc will check that and die with an error message, if its not true
     */
    pic->linesize[0]= mpi->stride[0];
    pic->linesize[1]= mpi->stride[1];
    pic->linesize[2]= mpi->stride[2];
    pic->linesize[3]= mpi->stride[3];

    pic->width  = avctx->width;
    pic->height = avctx->height;
    pic->format = avctx->pix_fmt;

    pic->opaque = mpi;
//printf("%X\n", (int)mpi->planes[0]);

    pic->buf[0] = av_buffer_create(pic->data[0], pic->height * pic->linesize[0],
                                release_buffer_hw, pic->opaque, 0);
    if (!pic->buf[0]) {
        av_frame_unref(pic);
        release_buffer_hw(mpi, NULL);
        return AVERROR(ENOMEM);
    }

    return 0;
}

static void release_buffer_hw(void *opaque, uint8_t *data){
    mp_image_t *mpi= opaque;

    if (mpi) {
//printf("release buffer %d %d %d\n", mpi ? mpi->flags&MP_IMGFLAG_PRESERVE : -99, ctx->ip_count, ctx->b_count);

        // release mpi (in case MPI_IMGTYPE_NUMBERED is used, e.g. for VDPAU)
        mpi->usage_count--;
        if (mpi->usage_count < 0) {
            mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Bad mp_image usage count, please report!\n");
            mpi->usage_count = 0;
        }
    }

//printf("R%X %X\n", pic->linesize[0], pic->data[0]);
}

// decode a frame
static mp_image_t *decode(sh_video_t *sh, void *data, int len, int flags){
    int got_picture=0;
    int ret;
    vd_ffmpeg_ctx *ctx = sh->context;
    AVFrame *pic= ctx->pic;
    AVCodecContext *avctx = ctx->avctx;
    mp_image_t *mpi=NULL;
    AVPacket pkt;

    if (ctx->refcount_frame) {
        av_frame_unref(ctx->refcount_frame);
        ctx->refcount_frame = NULL;
    }
    if(data && len<=0) return NULL; // skipped frame

    if (flags&3) {
        avctx->skip_frame = AVDISCARD_NONREF;
    }
    if (data)
    mp_msg(MSGT_DECVIDEO, MSGL_DBG2, "vd_ffmpeg data: %04x, %04x, %04x, %04x\n",
           ((int *)data)[0], ((int *)data)[1], ((int *)data)[2], ((int *)data)[3]);
    av_init_packet(&pkt);
    pkt.data = data;
    pkt.size = len;
    // Necessary to decode e.g. CorePNG and ZeroCodec correctly
    pkt.flags = (sh->ds->flags & 1) ? AV_PKT_FLAG_KEY : 0;
//    av_packet_split_side_data(&pkt);

    ret = avcodec_decode_video2(avctx, pic, &got_picture, &pkt);
    ctx->refcount_frame = pic;
    pkt.data = NULL;
    pkt.size = 0;
//    av_packet_free_side_data(&pkt);

    if(ret<0) mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Error while decoding frame!\n");
//printf("repeat: %d\n", pic->repeat_pict);

    if(!got_picture) {
        if (avctx->codec->id == AV_CODEC_ID_H264)// &&
//	    skip_frame <= AVDISCARD_DEFAULT)
	    return &mpi_no_picture; // H.264 first field only
	else
	    return NULL;    // skipped image
    }

    if(init_vo(sh, avctx->pix_fmt, 0) < 0) return NULL;

    if(pic->opaque){
        mpi=pic->opaque;
    }

    if(!mpi){        // temporary!
        mp_msg(MSGT_DECVIDEO, MSGL_WARN, MSGTR_MPCODECS_CouldntAllocateImageForCodec);
        return NULL;
    }

    if (mpi->w != avctx->width || mpi->h != avctx->height ||
        pic->width < mpi->w || pic->height < mpi->h) {
        mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Dropping frame with size not matching configured size (%ix%i vs %ix%i vs %ix%i)\n",
               mpi->w, mpi->h, pic->width, pic->height, avctx->width, avctx->height);
        return NULL;
    }

    if (!mpi->planes[0])
        return NULL;

/* to comfirm with newer lavc style */
//    mpi->qscale = av_frame_get_qp_table(pic, &mpi->qstride, &mpi->qscale_type);
    mpi->pict_type=pic->pict_type;
    mpi->fields = MP_IMGFIELD_ORDERED;
    if(pic->interlaced_frame) mpi->fields |= MP_IMGFIELD_INTERLACED;
    if(pic->top_field_first ) mpi->fields |= MP_IMGFIELD_TOP_FIRST;
    if(pic->repeat_pict == 1) mpi->fields |= MP_IMGFIELD_REPEAT_FIRST;

    return mpi;
}

static enum AVPixelFormat get_format(struct AVCodecContext *avctx,
                                     const enum AVPixelFormat *fmt)
{
    enum AVPixelFormat selected_format;
    int imgfmt;
    sh_video_t *sh = avctx->opaque;
    vd_ffmpeg_ctx *ctx = sh->context;
    int i;

    // Try to select identical format to avoid reinitializations
    if (ctx->vo_initialized && ctx->pix_fmt != AV_PIX_FMT_NONE)
        for (i = 0; fmt[i] != AV_PIX_FMT_NONE; i++)
            if (fmt[i] == ctx->pix_fmt) return ctx->pix_fmt;

    for(i=0;fmt[i]!=AV_PIX_FMT_NONE;i++){
        imgfmt = pixfmt2imgfmt2(fmt[i], avctx->codec_id);
        if(!IMGFMT_IS_HWACCEL(imgfmt) || !is_in_format_list(sh, imgfmt)) continue;
        mp_msg(MSGT_DECVIDEO, MSGL_V, MSGTR_MPCODECS_TryingPixfmt, i);
        if(init_vo(sh, fmt[i], 1) >= 0) {
            break;
        }
    }
    selected_format = fmt[i];
/*    if (selected_format == AV_PIX_FMT_NONE) {
        selected_format = avcodec_default_get_format(avctx, fmt);
        update_configuration(sh, selected_format, 1);
    }*/
    set_format_params(avctx, selected_format);
    return selected_format;
}

Index: Makefile
===================================================================
--- Makefile	(revisione 37838)
+++ Makefile	(copia locale)
@@ -56,6 +56,7 @@
                                         libmpcodecs/ad_ffmpeg.c         \
                                         libmpcodecs/ad_spdif.c          \
                                         libmpcodecs/vd_ffmpeg.c         \
+                                        libmpcodecs/vd_ffhw.c           \
                                         libmpcodecs/vf_geq.c            \
                                         libmpcodecs/vf_lavc.c           \
                                         libmpcodecs/vf_lavcdeint.c      \
Index: cfg-common.h
===================================================================
--- cfg-common.h	(revisione 37838)
+++ cfg-common.h	(copia locale)
@@ -544,6 +544,7 @@
 
 #ifdef CONFIG_FFMPEG
     {"lavdopts", lavc_decode_opts_conf, CONF_TYPE_SUBCONFIG, 0, 0, 0, NULL},
+    {"lavdhwopts", lavc_hwdecode_opts_conf, CONF_TYPE_SUBCONFIG, 0, 0, 0, NULL},
     {"lavfdopts",  lavfdopts_conf, CONF_TYPE_SUBCONFIG, CONF_GLOBAL, 0, 0, NULL},
 #endif
 #ifdef CONFIG_XVID4
Index: codec-cfg.c
===================================================================
--- codec-cfg.c	(revisione 37838)
+++ codec-cfg.c	(copia locale)
@@ -388,6 +388,7 @@
         "realvid",
         "xvid",
         "libdv",
+        "ffhw",
         NULL
     };
     char **drv=audioflag?audiodrv:videodrv;
Index: etc/codecs.conf
===================================================================
--- etc/codecs.conf	(revisione 37838)
+++ etc/codecs.conf	(copia locale)
@@ -407,8 +407,6 @@
   driver ffmpeg
   dll "mpeg1video"
   out YV12,I420,IYUV
-  out IDCT_MPEG2
-  out MOCO_MPEG2
 
 videocodec ffmpeg2
   info "FFmpeg MPEG-2"
@@ -446,8 +444,6 @@
   dll "mpeg2video"
   out YV12,I420,IYUV
   out 422P,444P
-  out IDCT_MPEG2
-  out MOCO_MPEG2
 
 ; for backward compatibility
 videocodec ffmpeg12
@@ -490,8 +486,6 @@
   dll "mpegvideo"
   out YV12,I420,IYUV
   out 422P,444P
-  out IDCT_MPEG2
-  out MOCO_MPEG2
 
 videocodec mpeg12
   info "MPEG-1 or 2 (libmpeg2)"
@@ -534,7 +528,7 @@
   out 422P
 
 videocodec ffmpeg12mc
-  info "FFmpeg MPEG-1/2 (XvMC) - deprecated, just use ffmpeg12"
+  info "FFmpeg MPEG-1/2 (XvMC)"
   status buggy
   format 0x10000001  ; MPEG-1
   format 0x10000002  ; MPEG-2
@@ -566,7 +560,7 @@
   fourcc m2v1,m1v1
   fourcc "m1v "
   fourcc LMP2 ; Lead mpeg2 in avi
-  driver ffmpeg
+  driver ffhw
   dll "mpegvideo_xvmc"
   out IDCT_MPEG2
   out MOCO_MPEG2
@@ -599,7 +593,7 @@
   fourcc LMP2 ; Lead mpeg2 in avi
   fourcc m2v1,m1v1
   fourcc "m1v "
-  driver ffmpeg
+  driver ffhw
   dll "mpegvideo"
   out VDPAU_MPEG1
   out VDPAU_MPEG2
@@ -1322,7 +1316,7 @@
   info "FFmpeg WMV3/WMV9 (VDPAU)"
   status buggy
   fourcc WMV3,wmv3
-  driver ffmpeg
+  driver ffhw
   dll wmv3
   out VDPAU_WMV3
 
@@ -1348,7 +1342,7 @@
   status buggy
   fourcc WVC1,wvc1,WMVA
   fourcc vc-1,VC-1
-  driver ffmpeg
+  driver ffhw
   dll vc1
   out VDPAU_VC1
 
@@ -1403,7 +1397,7 @@
   fourcc HEVC
   fourcc hvc1
   fourcc hev1
-  driver ffmpeg
+  driver ffhw
   dll hevc
   out VDPAU_HEVC
 
@@ -1448,7 +1442,7 @@
   fourcc GAVC,UMSV
   fourcc rv64 ; Radvision
   format 0x10000005
-  driver ffmpeg
+  driver ffhw
   dll h264
   out VDPAU_H264
 
@@ -1591,7 +1585,7 @@
   fourcc DreX,DM4V,LMP4,DP02
   fourcc QMP4
   fourcc DYM4
-  driver ffmpeg
+  driver ffhw
   dll mpeg4
   out VDPAU_MPEG4
 
Index: libmpcodecs/vd.c
===================================================================
--- libmpcodecs/vd.c	(revisione 37838)
+++ libmpcodecs/vd.c	(copia locale)
@@ -39,6 +39,7 @@
 extern const vd_functions_t mpcodecs_vd_null;
 extern const vd_functions_t mpcodecs_vd_black;
 extern const vd_functions_t mpcodecs_vd_ffmpeg;
+extern const vd_functions_t mpcodecs_vd_ffhw;
 extern const vd_functions_t mpcodecs_vd_theora;
 extern const vd_functions_t mpcodecs_vd_dshow;
 extern const vd_functions_t mpcodecs_vd_dmo;
@@ -69,6 +70,7 @@
     &mpcodecs_vd_black,
 #ifdef CONFIG_FFMPEG
     &mpcodecs_vd_ffmpeg,
+    &mpcodecs_vd_ffhw,
 #endif
 #ifdef CONFIG_OGGTHEORA
     &mpcodecs_vd_theora,
Index: libmpcodecs/vd.h
===================================================================
--- libmpcodecs/vd.h	(revisione 37838)
+++ libmpcodecs/vd.h	(copia locale)
@@ -50,6 +50,7 @@
 extern float screen_size_xy;
 
 extern const m_option_t lavc_decode_opts_conf[];
+extern const m_option_t lavc_hwdecode_opts_conf[];
 extern const m_option_t xvid_dec_opts[];
 
 #define VDCTRL_QUERY_FORMAT 3 /* test for availabilty of a format */
Index: libmpcodecs/vd_ffmpeg.c
===================================================================
--- libmpcodecs/vd_ffmpeg.c	(revisione 37838)
+++ libmpcodecs/vd_ffmpeg.c	(copia locale)
@@ -71,10 +71,6 @@
 #error palette too large, adapt libmpcodecs/vf.c:vf_get_image
 #endif
 
-#if CONFIG_XVMC
-#include "libavcodec/xvmc.h"
-#endif
-
 typedef struct {
     AVCodecContext *avctx;
     AVFrame *pic;
@@ -92,7 +88,6 @@
     int b_count;
     AVRational last_sample_aspect_ratio;
     int palette_sent;
-    int use_vdpau;
 } vd_ffmpeg_ctx;
 
 #include "m_option.h"
@@ -193,11 +188,6 @@
             if(ctx->best_csp == IMGFMT_YV12) return CONTROL_TRUE;// u/v swap
             if(ctx->best_csp == IMGFMT_422P && !ctx->do_dr1) return CONTROL_TRUE;// half stride
             break;
-#if CONFIG_XVMC
-        case IMGFMT_XVMC_IDCT_MPEG2:
-        case IMGFMT_XVMC_MOCO_MPEG2:
-            if(avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT) return CONTROL_TRUE;
-#endif
         }
         return CONTROL_FALSE;
     }
@@ -213,39 +203,6 @@
     return CONTROL_UNKNOWN;
 }
 
-#if CONFIG_VDPAU
-static int vdpau_render_wrapper(AVCodecContext *s, AVFrame *f,
-    const VdpPictureInfo *info, uint32_t count, const VdpBitstreamBuffer *buffers)
-{
-    mp_image_t *mpi = f->opaque;
-    sh_video_t *sh = s->opaque;
-    struct vdpau_frame_data data;
-    uint8_t *planes[4] = {(void *)&data};
-    data.surface = (VdpVideoSurface)mpi->priv;
-    data.info = info;
-    data.bitstream_buffers_used = count;
-    data.bitstream_buffers = buffers;
-    mpcodecs_draw_slice(sh, planes, NULL, sh->disp_w, sh->disp_h, 0, 0);
-    return 0;
-}
-#endif
-
-static int pixfmt2imgfmt2(enum AVPixelFormat fmt, enum AVCodecID cid)
-{
-    if (fmt == AV_PIX_FMT_VDPAU)
-        switch (cid) {
-        case AV_CODEC_ID_H264:       return IMGFMT_VDPAU_H264;
-        case AV_CODEC_ID_MPEG1VIDEO: return IMGFMT_VDPAU_MPEG1;
-        case AV_CODEC_ID_MPEG2VIDEO: return IMGFMT_VDPAU_MPEG2;
-        case AV_CODEC_ID_MPEG4:      return IMGFMT_VDPAU_MPEG4;
-        case AV_CODEC_ID_WMV3:       return IMGFMT_VDPAU_WMV3;
-        case AV_CODEC_ID_VC1:        return IMGFMT_VDPAU_VC1;
-        case AV_CODEC_ID_HEVC:       return IMGFMT_VDPAU_HEVC;
-        }
-    return pixfmt2imgfmt(fmt);
-}
-
-
 /**
  * Function to set slice/dr related settings that need to be reset after
  * initializing hardware acceleration failed */
@@ -290,37 +247,8 @@
     int imgfmt;
     if (fmt == AV_PIX_FMT_NONE)
         return;
-    ctx->use_vdpau = fmt == AV_PIX_FMT_VDPAU;
-    imgfmt = pixfmt2imgfmt2(fmt, avctx->codec_id);
-#if CONFIG_VDPAU
-    if (!ctx->use_vdpau) {
-        av_freep(&avctx->hwaccel_context);
-    } else {
-        AVVDPAUContext *vdpc = avctx->hwaccel_context;
-        if (!vdpc)
-            avctx->hwaccel_context = vdpc = av_alloc_vdpaucontext();
-        vdpc->render2 = vdpau_render_wrapper;
-    }
-#endif
-    if (IMGFMT_IS_HWACCEL(imgfmt)) {
-        ctx->do_dr1    = 1;
-        ctx->nonref_dr = 0;
-        avctx->get_buffer2 = get_buffer2;
-        mp_msg(MSGT_DECVIDEO, MSGL_V, IMGFMT_IS_XVMC(imgfmt) ?
-               MSGTR_MPCODECS_XVMCAcceleratedMPEG2 :
-               "[VD_FFMPEG] VDPAU accelerated decoding\n");
-        if (ctx->use_vdpau) {
-            avctx->draw_horiz_band = NULL;
-            avctx->slice_flags = 0;
-            ctx->do_slices = 0;
-        } else {
-            avctx->draw_horiz_band = draw_slice;
-            avctx->slice_flags = SLICE_FLAG_CODED_ORDER|SLICE_FLAG_ALLOW_FIELD;
-            ctx->do_slices = 1;
-        }
-    } else {
-        set_dr_slice_settings(avctx, avctx->codec);
-    }
+    imgfmt = pixfmt2imgfmt(fmt);
+    set_dr_slice_settings(avctx, avctx->codec);
 }
 
 // init driver
@@ -548,10 +476,6 @@
         mp_msg(MSGT_DECVIDEO, MSGL_FATAL, "BUG in FFmpeg, draw_slice called with NULL pointer!\n");
         return;
     }
-    if (mpi && ctx->use_vdpau) {
-        mp_msg(MSGT_DECVIDEO, MSGL_FATAL, "BUG in FFmpeg, draw_slice called for VDPAU!\n");
-        return;
-    }
     if (height < 0)
     {
         int i;
@@ -607,7 +531,7 @@
             ctx->last_sample_aspect_ratio = avctx->sample_aspect_ratio;
         }
         ctx->pix_fmt = pix_fmt;
-        ctx->best_csp = pixfmt2imgfmt2(pix_fmt, avctx->codec_id);
+        ctx->best_csp = pixfmt2imgfmt(pix_fmt);
     }
 }
 
@@ -625,7 +549,7 @@
     vd_ffmpeg_ctx *ctx = sh->context;
     const AVCodecContext *avctx = ctx->avctx;
     int width, height;
-    int imgfmt = pixfmt2imgfmt2(pix_fmt, avctx->codec_id);
+    int imgfmt = pixfmt2imgfmt(pix_fmt);
 
     // avoid initialization for formats not on the supported
     // list in the codecs.conf entry.
@@ -702,9 +626,7 @@
         goto disable_dr1;
     }
 
-    if (IMGFMT_IS_HWACCEL(ctx->best_csp)) {
-        type =  MP_IMGTYPE_NUMBERED;
-    } else if (avctx->has_b_frames) {
+    if (avctx->has_b_frames) {
         // HACK/TODO: slices currently do not work properly with B-frames,
         // causing out-of-order frames or crashes with e.g. -vf scale,unsharp
         // or -vf screenshot,unsharp.
@@ -737,28 +659,6 @@
         avctx->draw_horiz_band= draw_slice;
     } else
         avctx->draw_horiz_band= NULL;
-#if CONFIG_VDPAU
-    if (ctx->use_vdpau) {
-        VdpVideoSurface surface = (VdpVideoSurface)mpi->priv;
-        avctx->draw_horiz_band= NULL;
-        mpi->planes[3] = surface;
-    }
-#endif
-#if CONFIG_XVMC
-    if(IMGFMT_IS_XVMC(mpi->imgfmt)) {
-        struct xvmc_pix_fmt *render = mpi->priv; //same as data[2]
-        if(!(mpi->flags & MP_IMGFLAG_DIRECT)) {
-            mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_MPCODECS_OnlyBuffersAllocatedByVoXvmcAllowed);
-            assert(0);
-            return -1;//!!fixme check error conditions in ffmpeg
-        }
-        if(mp_msg_test(MSGT_DECVIDEO, MSGL_DBG5))
-            mp_msg(MSGT_DECVIDEO, MSGL_DBG5, "vd_ffmpeg::get_buffer (xvmc render=%p)\n", render);
-        assert(render != 0);
-        assert(render->xvmc_id == AV_XVMC_ID);
-        avctx->draw_horiz_band= draw_slice;
-    }
-#endif
 
     pic->data[0]= mpi->planes[0];
     pic->data[1]= mpi->planes[1];
@@ -1095,7 +995,7 @@
             if (fmt[i] == ctx->pix_fmt) return ctx->pix_fmt;
 
     for(i=0;fmt[i]!=AV_PIX_FMT_NONE;i++){
-        imgfmt = pixfmt2imgfmt2(fmt[i], avctx->codec_id);
+        imgfmt = pixfmt2imgfmt(fmt[i]);
         if(!IMGFMT_IS_HWACCEL(imgfmt) || !is_in_format_list(sh, imgfmt)) continue;
         mp_msg(MSGT_DECVIDEO, MSGL_V, MSGTR_MPCODECS_TryingPixfmt, i);
         if(init_vo(sh, fmt[i], 1) >= 0) {
@@ -1203,10 +1103,6 @@
         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
 
         planes = av_pix_fmt_count_planes(frame->format);
-        /* workaround for AVHWAccel plane count of 0, buf[0] is used as
-           check for allocated buffers: make libavcodec happy */
-        if (desc && desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
-            planes = 1;
         if (!desc || planes <= 0) {
             ret = AVERROR(EINVAL);
             goto fail;