mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
|
|
* VDA H.264 hardware acceleration
|
|
*
|
|
* copyright (c) 2011 Sebastien Zwickert
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "h264.h"
|
|
#include "h264data.h"
|
|
|
|
#include "vda_internal.h"
|
|
|
|
/* This structure is used to store the bitstream of the current frame. */
|
|
struct vda_picture_context {
|
|
uint8_t *bitstream;
|
|
int bitstream_size;
|
|
};
|
|
|
|
static int start_frame(AVCodecContext *avctx,
|
|
av_unused const uint8_t *buffer,
|
|
av_unused uint32_t size)
|
|
{
|
|
const H264Context *h = avctx->priv_data;
|
|
struct vda_context *vda_ctx = avctx->hwaccel_context;
|
|
struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
|
|
|
|
if (!vda_ctx->decoder)
|
|
return -1;
|
|
|
|
pic_ctx->bitstream = NULL;
|
|
pic_ctx->bitstream_size = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_slice(AVCodecContext *avctx,
|
|
const uint8_t *buffer,
|
|
uint32_t size)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
struct vda_context *vda_ctx = avctx->hwaccel_context;
|
|
struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
|
|
void *tmp;
|
|
|
|
if (!vda_ctx->decoder)
|
|
return -1;
|
|
|
|
tmp = av_realloc(pic_ctx->bitstream, pic_ctx->bitstream_size+size+4);
|
|
if (!tmp)
|
|
return AVERROR(ENOMEM);
|
|
|
|
pic_ctx->bitstream = tmp;
|
|
|
|
AV_WB32(pic_ctx->bitstream + pic_ctx->bitstream_size, size);
|
|
memcpy(pic_ctx->bitstream + pic_ctx->bitstream_size + 4, buffer, size);
|
|
|
|
pic_ctx->bitstream_size += size + 4;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int end_frame(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
struct vda_context *vda_ctx = avctx->hwaccel_context;
|
|
struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
|
|
AVFrame *frame = &h->s.current_picture_ptr->f;
|
|
int status;
|
|
|
|
if (!vda_ctx->decoder || !pic_ctx->bitstream)
|
|
return -1;
|
|
|
|
status = ff_vda_decoder_decode(vda_ctx, pic_ctx->bitstream,
|
|
pic_ctx->bitstream_size,
|
|
frame->reordered_opaque);
|
|
|
|
if (status)
|
|
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
|
|
|
|
av_freep(&pic_ctx->bitstream);
|
|
|
|
return status;
|
|
}
|
|
|
|
AVHWAccel ff_h264_vda_hwaccel = {
|
|
.name = "h264_vda",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_H264,
|
|
.pix_fmt = PIX_FMT_VDA_VLD,
|
|
.start_frame = start_frame,
|
|
.decode_slice = decode_slice,
|
|
.end_frame = end_frame,
|
|
.priv_data_size = sizeof(struct vda_picture_context),
|
|
};
|