| /* |
| * generic decoding-related code |
| * |
| * 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 |
| */ |
| |
| #ifndef AVCODEC_DECODE_H |
| #define AVCODEC_DECODE_H |
| |
| #include "libavutil/buffer.h" |
| #include "libavutil/frame.h" |
| #include "libavutil/hwcontext.h" |
| |
| #include "avcodec.h" |
| |
| /** |
| * This struct stores per-frame lavc-internal data and is attached to it via |
| * private_ref. |
| */ |
| typedef struct FrameDecodeData { |
| /** |
| * The callback to perform some delayed processing on the frame right |
| * before it is returned to the caller. |
| * |
| * @note This code is called at some unspecified point after the frame is |
| * returned from the decoder's decode/receive_frame call. Therefore it cannot rely |
| * on AVCodecContext being in any specific state, so it does not get to |
| * access AVCodecContext directly at all. All the state it needs must be |
| * stored in the post_process_opaque object. |
| */ |
| int (*post_process)(void *logctx, AVFrame *frame); |
| void *post_process_opaque; |
| void (*post_process_opaque_free)(void *opaque); |
| |
| /** |
| * Per-frame private data for hwaccels. |
| */ |
| void *hwaccel_priv; |
| void (*hwaccel_priv_free)(void *priv); |
| } FrameDecodeData; |
| |
| /** |
| * Called by decoders to get the next packet for decoding. |
| * |
| * @param pkt An empty packet to be filled with data. |
| * @return 0 if a new reference has been successfully written to pkt |
| * AVERROR(EAGAIN) if no data is currently available |
| * AVERROR_EOF if and end of stream has been reached, so no more data |
| * will be available |
| */ |
| int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt); |
| |
| /** |
| * Set various frame properties from the codec context / packet data. |
| */ |
| int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame); |
| |
| /** |
| * Called during avcodec_open2() to initialize avctx->internal->bsf. |
| * The bsf should be freed with av_bsf_free(). |
| */ |
| int ff_decode_bsfs_init(AVCodecContext *avctx); |
| |
| /** |
| * Make sure avctx.hw_frames_ctx is set. If it's not set, the function will |
| * try to allocate it from hw_device_ctx. If that is not possible, an error |
| * message is printed, and an error code is returned. |
| */ |
| int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx, |
| enum AVHWDeviceType dev_type); |
| |
| int ff_attach_decode_data(AVFrame *frame); |
| |
| #endif /* AVCODEC_DECODE_H */ |