diff options
author | Sebastien Zwickert <dilaroga@free.fr> | 2011-11-02 03:55:09 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2011-11-02 18:47:27 +0400 |
commit | d66ee6ac4898b8af2f9c39bd0893e89e823286ac (patch) | |
tree | eadeffa696d7a4438356bf75f5882a8dfa9c09b4 /libavcodec/vda_h264.c | |
parent | e377e6621bf2327161eff6de67b5f18fd070f7ae (diff) |
HWAccel: adds Video Decoder Acceleration (VDA) module for Mac OS X.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/vda_h264.c')
-rw-r--r-- | libavcodec/vda_h264.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/libavcodec/vda_h264.c b/libavcodec/vda_h264.c new file mode 100644 index 0000000000..f4791a168c --- /dev/null +++ b/libavcodec/vda_h264.c @@ -0,0 +1,107 @@ +/* + * VDA H264 HW acceleration. + * + * copyright (c) 2011 Sebastien Zwickert + * + * 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 "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 = (AVFrame*)h->s.current_picture_ptr; + 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, + .capabilities = 0, + .start_frame = start_frame, + .decode_slice = decode_slice, + .end_frame = end_frame, + .priv_data_size = sizeof(struct vda_picture_context), +}; |