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https://github.com/FFmpeg/FFmpeg.git
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110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
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* VDA H.264 hardware acceleration
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*
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* copyright (c) 2011 Sebastien Zwickert
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "h264.h"
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#include "h264data.h"
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#include "vda_internal.h"
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/* This structure is used to store the bitstream of the current frame. */
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struct vda_picture_context {
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uint8_t *bitstream;
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int bitstream_size;
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};
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static int start_frame(AVCodecContext *avctx,
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av_unused const uint8_t *buffer,
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av_unused uint32_t size)
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{
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const H264Context *h = avctx->priv_data;
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struct vda_context *vda_ctx = avctx->hwaccel_context;
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struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
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if (!vda_ctx->decoder)
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return -1;
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pic_ctx->bitstream = NULL;
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pic_ctx->bitstream_size = 0;
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return 0;
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}
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static int decode_slice(AVCodecContext *avctx,
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const uint8_t *buffer,
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uint32_t size)
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{
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H264Context *h = avctx->priv_data;
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struct vda_context *vda_ctx = avctx->hwaccel_context;
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struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
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void *tmp;
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if (!vda_ctx->decoder)
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return -1;
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tmp = av_realloc(pic_ctx->bitstream, pic_ctx->bitstream_size+size+4);
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if (!tmp)
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return AVERROR(ENOMEM);
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pic_ctx->bitstream = tmp;
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AV_WB32(pic_ctx->bitstream + pic_ctx->bitstream_size, size);
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memcpy(pic_ctx->bitstream + pic_ctx->bitstream_size + 4, buffer, size);
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pic_ctx->bitstream_size += size + 4;
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return 0;
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}
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static int end_frame(AVCodecContext *avctx)
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{
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H264Context *h = avctx->priv_data;
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struct vda_context *vda_ctx = avctx->hwaccel_context;
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struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
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AVFrame *frame = &h->s.current_picture_ptr->f;
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int status;
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if (!vda_ctx->decoder || !pic_ctx->bitstream)
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return -1;
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status = ff_vda_decoder_decode(vda_ctx, pic_ctx->bitstream,
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pic_ctx->bitstream_size,
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frame->reordered_opaque);
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if (status)
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av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
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av_freep(&pic_ctx->bitstream);
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return status;
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}
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AVHWAccel ff_h264_vda_hwaccel = {
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.name = "h264_vda",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_H264,
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.pix_fmt = PIX_FMT_VDA_VLD,
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.start_frame = start_frame,
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.decode_slice = decode_slice,
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.end_frame = end_frame,
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.priv_data_size = sizeof(struct vda_picture_context),
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};
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