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Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/decode.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/decode.h b/media/ffvpx/libavcodec/decode.h new file mode 100644 index 0000000000..8430ffbd66 --- /dev/null +++ b/media/ffvpx/libavcodec/decode.h @@ -0,0 +1,153 @@ +/* + * 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; + +/** + * avcodec_receive_frame() implementation for decoders. + */ +int ff_decode_receive_frame(AVCodecContext *avctx, AVFrame *frame); + +/** + * 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 provided packet. + */ +int ff_decode_frame_props_from_pkt(const AVCodecContext *avctx, + AVFrame *frame, const AVPacket *pkt); + +/** + * Set various frame properties from the codec context / packet data. + */ +int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame); + +/** + * 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); + +/** + * Check whether the side-data of src contains a palette of + * size AVPALETTE_SIZE; if so, copy it to dst and return 1; + * else return 0. + * Also emit an error message upon encountering a palette + * with invalid size. + */ +int ff_copy_palette(void *dst, const AVPacket *src, void *logctx); + +/** + * Perform decoder initialization and validation. + * Called when opening the decoder, before the FFCodec.init() call. + */ +int ff_decode_preinit(AVCodecContext *avctx); + +/** + * Check that the provided frame dimensions are valid and set them on the codec + * context. + */ +int ff_set_dimensions(AVCodecContext *s, int width, int height); + +/** + * Check that the provided sample aspect ratio is valid and set it on the codec + * context. + */ +int ff_set_sar(AVCodecContext *avctx, AVRational sar); + +/** + * Select the (possibly hardware accelerated) pixel format. + * This is a wrapper around AVCodecContext.get_format() and should be used + * instead of calling get_format() directly. + * + * The list of pixel formats must contain at least one valid entry, and is + * terminated with AV_PIX_FMT_NONE. If it is possible to decode to software, + * the last entry in the list must be the most accurate software format. + * If it is not possible to decode to software, AVCodecContext.sw_pix_fmt + * must be set before calling this function. + */ +int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt); + +/** + * Get a buffer for a frame. This is a wrapper around + * AVCodecContext.get_buffer() and should be used instead calling get_buffer() + * directly. + */ +int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags); + +#define FF_REGET_BUFFER_FLAG_READONLY 1 ///< the returned buffer does not need to be writable +/** + * Identical in function to ff_get_buffer(), except it reuses the existing buffer + * if available. + */ +int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags); + +/** + * Add or update AV_FRAME_DATA_MATRIXENCODING side data. + */ +int ff_side_data_update_matrix_encoding(AVFrame *frame, + enum AVMatrixEncoding matrix_encoding); + +#endif /* AVCODEC_DECODE_H */ |