PeerStreamer

/*

 * Video Acceleration API (video decoding)

 * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1

 *

 * Copyright (C) 2008-2009 Splitted-Desktop Systems

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * 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.

 *

 * FFmpeg 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "vaapi_internal.h"

/**

 * \addtogroup VAAPI_Decoding

 *

 * @{

 */

static void destroy_buffers(VADisplay display, VABufferID *buffers, unsigned int n_buffers)

{

    unsigned int i;

    for (i = 0; i < n_buffers; i++) {

        if (buffers[i]) {

            vaDestroyBuffer(display, buffers[i]);

            buffers[i] = 0;

        }

    }

}

static int render_picture(struct vaapi_context *vactx, VASurfaceID surface)

{

    VABufferID va_buffers[3];

    unsigned int n_va_buffers = 0;

    vaUnmapBuffer(vactx->display, vactx->pic_param_buf_id);

    va_buffers[n_va_buffers++] = vactx->pic_param_buf_id;

    if (vactx->iq_matrix_buf_id) {

        vaUnmapBuffer(vactx->display, vactx->iq_matrix_buf_id);

        va_buffers[n_va_buffers++] = vactx->iq_matrix_buf_id;

    }

    if (vactx->bitplane_buf_id) {

        vaUnmapBuffer(vactx->display, vactx->bitplane_buf_id);

        va_buffers[n_va_buffers++] = vactx->bitplane_buf_id;

    }

    if (vaBeginPicture(vactx->display, vactx->context_id,

                       surface) != VA_STATUS_SUCCESS)

        return -1;

    if (vaRenderPicture(vactx->display, vactx->context_id,

                        va_buffers, n_va_buffers) != VA_STATUS_SUCCESS)

        return -1;

    if (vaRenderPicture(vactx->display, vactx->context_id,

                        vactx->slice_buf_ids,

                        vactx->n_slice_buf_ids) != VA_STATUS_SUCCESS)

        return -1;

    if (vaEndPicture(vactx->display, vactx->context_id) != VA_STATUS_SUCCESS)

        return -1;

    return 0;

}

static int commit_slices(struct vaapi_context *vactx)

{

    VABufferID *slice_buf_ids;

    VABufferID slice_param_buf_id, slice_data_buf_id;

    if (vactx->slice_count == 0)

        return 0;

    slice_buf_ids =

        av_fast_realloc(vactx->slice_buf_ids,

                        &vactx->slice_buf_ids_alloc,

                        (vactx->n_slice_buf_ids + 2) * sizeof(slice_buf_ids[0]));

    if (!slice_buf_ids)

        return -1;

    vactx->slice_buf_ids = slice_buf_ids;

    slice_param_buf_id = 0;

    if (vaCreateBuffer(vactx->display, vactx->context_id,

                       VASliceParameterBufferType,

                       vactx->slice_param_size,

                       vactx->slice_count, vactx->slice_params,

                       &slice_param_buf_id) != VA_STATUS_SUCCESS)

        return -1;

    vactx->slice_count = 0;

    slice_data_buf_id = 0;

    if (vaCreateBuffer(vactx->display, vactx->context_id,

                       VASliceDataBufferType,

                       vactx->slice_data_size,

                       1, (void *)vactx->slice_data,

                       &slice_data_buf_id) != VA_STATUS_SUCCESS)

        return -1;

    vactx->slice_data = NULL;

    vactx->slice_data_size = 0;

    slice_buf_ids[vactx->n_slice_buf_ids++] = slice_param_buf_id;

    slice_buf_ids[vactx->n_slice_buf_ids++] = slice_data_buf_id;

    return 0;

}

static void *alloc_buffer(struct vaapi_context *vactx, int type, unsigned int size, uint32_t *buf_id)

{

    void *data = NULL;

    *buf_id = 0;

    if (vaCreateBuffer(vactx->display, vactx->context_id,

                       type, size, 1, NULL, buf_id) == VA_STATUS_SUCCESS)

        vaMapBuffer(vactx->display, *buf_id, &data);

    return data;

}

void *ff_vaapi_alloc_picture(struct vaapi_context *vactx, unsigned int size)

{

    return alloc_buffer(vactx, VAPictureParameterBufferType, size, &vactx->pic_param_buf_id);

}

void *ff_vaapi_alloc_iq_matrix(struct vaapi_context *vactx, unsigned int size)

{

    return alloc_buffer(vactx, VAIQMatrixBufferType, size, &vactx->iq_matrix_buf_id);

}

uint8_t *ff_vaapi_alloc_bitplane(struct vaapi_context *vactx, uint32_t size)

{

    return alloc_buffer(vactx, VABitPlaneBufferType, size, &vactx->bitplane_buf_id);

}

VASliceParameterBufferBase *ff_vaapi_alloc_slice(struct vaapi_context *vactx, const uint8_t *buffer, uint32_t size)

{

    uint8_t *slice_params;

    VASliceParameterBufferBase *slice_param;

    if (!vactx->slice_data)

        vactx->slice_data = buffer;

    if (vactx->slice_data + vactx->slice_data_size != buffer) {

        if (commit_slices(vactx) < 0)

            return NULL;

        vactx->slice_data = buffer;

    }

    slice_params =

        av_fast_realloc(vactx->slice_params,

                        &vactx->slice_params_alloc,

                        (vactx->slice_count + 1) * vactx->slice_param_size);

    if (!slice_params)

        return NULL;

    vactx->slice_params = slice_params;

    slice_param = (VASliceParameterBufferBase *)(slice_params + vactx->slice_count * vactx->slice_param_size);

    slice_param->slice_data_size   = size;

    slice_param->slice_data_offset = vactx->slice_data_size;

    slice_param->slice_data_flag   = VA_SLICE_DATA_FLAG_ALL;

    vactx->slice_count++;

    vactx->slice_data_size += size;

    return slice_param;

}

int ff_vaapi_common_end_frame(MpegEncContext *s)

{

    struct vaapi_context * const vactx = s->avctx->hwaccel_context;

    int ret = -1;

    dprintf(s->avctx, "ff_vaapi_common_end_frame()\n");

    if (commit_slices(vactx) < 0)

        goto done;

    if (vactx->n_slice_buf_ids > 0) {

        if (render_picture(vactx, ff_vaapi_get_surface_id(s->current_picture_ptr)) < 0)

            goto done;

        ff_draw_horiz_band(s, 0, s->avctx->height);

    }

    ret = 0;

done:

    destroy_buffers(vactx->display, &vactx->pic_param_buf_id, 1);

    destroy_buffers(vactx->display, &vactx->iq_matrix_buf_id, 1);

    destroy_buffers(vactx->display, &vactx->bitplane_buf_id, 1);

    destroy_buffers(vactx->display, vactx->slice_buf_ids, vactx->n_slice_buf_ids);

    av_freep(&vactx->slice_buf_ids);

    av_freep(&vactx->slice_params);

    vactx->n_slice_buf_ids     = 0;

    vactx->slice_buf_ids_alloc = 0;

    vactx->slice_count         = 0;

    vactx->slice_params_alloc  = 0;

    return ret;

}

/* @} */