ffmpeg_qsv.c 3.05 KB
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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <mfx/mfxvideo.h>
#include <stdlib.h>

#include "libavutil/dict.h"
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#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_qsv.h"
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#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavcodec/qsv.h"

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#include "ffmpeg.h"
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static AVBufferRef *hw_device_ctx;
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char *qsv_device = NULL;

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static int qsv_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
{
    InputStream *ist = s->opaque;

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    return av_hwframe_get_buffer(ist->hw_frames_ctx, frame, 0);
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}

static void qsv_uninit(AVCodecContext *s)
{
    InputStream *ist = s->opaque;
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    av_buffer_unref(&ist->hw_frames_ctx);
}
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static int qsv_device_init(InputStream *ist)
{
    int err;
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    AVDictionary *dict = NULL;

    if (qsv_device) {
        err = av_dict_set(&dict, "child_device", qsv_device, 0);
        if (err < 0)
            return err;
    }
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    err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV,
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                                 ist->hwaccel_device, dict, 0);
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    if (err < 0) {
        av_log(NULL, AV_LOG_ERROR, "Error creating a QSV device\n");
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        goto err_out;
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    }
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err_out:
    if (dict)
        av_dict_free(&dict);

    return err;
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}

int qsv_init(AVCodecContext *s)
{
    InputStream *ist = s->opaque;
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    AVHWFramesContext *frames_ctx;
    AVQSVFramesContext *frames_hwctx;
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    int ret;

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    if (!hw_device_ctx) {
        ret = qsv_device_init(ist);
        if (ret < 0)
            return ret;
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    }

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    av_buffer_unref(&ist->hw_frames_ctx);
    ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
    if (!ist->hw_frames_ctx)
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        return AVERROR(ENOMEM);

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    frames_ctx   = (AVHWFramesContext*)ist->hw_frames_ctx->data;
    frames_hwctx = frames_ctx->hwctx;

    frames_ctx->width             = FFALIGN(s->coded_width,  32);
    frames_ctx->height            = FFALIGN(s->coded_height, 32);
    frames_ctx->format            = AV_PIX_FMT_QSV;
    frames_ctx->sw_format         = s->sw_pix_fmt;
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    frames_ctx->initial_pool_size = 64 + s->extra_hw_frames;
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    frames_hwctx->frame_type      = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
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    ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
    if (ret < 0) {
        av_log(NULL, AV_LOG_ERROR, "Error initializing a QSV frame pool\n");
        return ret;
    }
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    ist->hwaccel_get_buffer = qsv_get_buffer;
    ist->hwaccel_uninit     = qsv_uninit;

    return 0;
}