mirror of
https://github.com/FFmpeg/FFmpeg.git
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827d6fe73d
This commit follows the same logic as 061a0c14bb, but for the encode API: The
new public encoding API will no longer be a wrapper around the old deprecated
one, and the internal API used by the encoders now consists of a single
receive_packet() callback that pulls frames as required.
amf encoders adapted by James Almer
librav1e encoder adapted by James Almer
nvidia encoders adapted by James Almer
MediaFoundation encoders adapted by James Almer
vaapi encoders adapted by Linjie Fu
v4l2_m2m encoders adapted by Andriy Gelman
Signed-off-by: James Almer <jamrial@gmail.com>
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/*
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* V4L2 mem2mem helper functions
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*
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* Copyright (C) 2017 Alexis Ballier <aballier@gentoo.org>
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* Copyright (C) 2017 Jorge Ramirez <jorge.ramirez-ortiz@linaro.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#ifndef AVCODEC_V4L2_M2M_H
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#define AVCODEC_V4L2_M2M_H
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#include <semaphore.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <linux/videodev2.h>
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#include "libavcodec/avcodec.h"
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#include "v4l2_context.h"
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#define container_of(ptr, type, member) ({ \
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const __typeof__(((type *)0)->member ) *__mptr = (ptr); \
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(type *)((char *)__mptr - offsetof(type,member) );})
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#define V4L_M2M_DEFAULT_OPTS \
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{ "num_output_buffers", "Number of buffers in the output context",\
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OFFSET(num_output_buffers), AV_OPT_TYPE_INT, { .i64 = 16 }, 6, INT_MAX, FLAGS }
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typedef struct V4L2m2mContext {
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char devname[PATH_MAX];
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int fd;
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/* the codec context queues */
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V4L2Context capture;
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V4L2Context output;
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/* dynamic stream reconfig */
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AVCodecContext *avctx;
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sem_t refsync;
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atomic_uint refcount;
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int reinit;
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/* null frame/packet received */
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int draining;
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AVPacket buf_pkt;
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/* Reference to a frame. Only used during encoding */
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AVFrame *frame;
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/* Reference to self; only valid while codec is active. */
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AVBufferRef *self_ref;
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/* reference back to V4L2m2mPriv */
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void *priv;
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} V4L2m2mContext;
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typedef struct V4L2m2mPriv {
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AVClass *class;
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V4L2m2mContext *context;
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AVBufferRef *context_ref;
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int num_output_buffers;
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int num_capture_buffers;
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} V4L2m2mPriv;
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/**
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* Allocate a new context and references for a V4L2 M2M instance.
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*
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* @param[in] ctx The V4L2m2mPriv instantiated by the encoder/decoder.
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* @param[out] ctx The V4L2m2mContext.
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*
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* @returns 0 in success, a negative error code otherwise.
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*/
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int ff_v4l2_m2m_create_context(V4L2m2mPriv *priv, V4L2m2mContext **s);
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/**
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* Probes the video nodes looking for the required codec capabilities.
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*
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* @param[in] ctx The V4L2m2mPriv instantiated by the encoder/decoder.
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*
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* @returns 0 if a driver is found, a negative number otherwise.
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*/
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int ff_v4l2_m2m_codec_init(V4L2m2mPriv *priv);
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/**
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* Releases all the codec resources if all AVBufferRefs have been returned to the
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* ctx. Otherwise keep the driver open.
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*
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* @param[in] The V4L2m2mPriv instantiated by the encoder/decoder.
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*
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* @returns 0
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*
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*/
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int ff_v4l2_m2m_codec_end(V4L2m2mPriv *priv);
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/**
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* Reinitializes the V4L2m2mContext when the driver cannot continue processing
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* with the capture parameters.
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*
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* @param[in] ctx The V4L2m2mContext instantiated by the encoder/decoder.
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*
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* @returns 0 in case of success, negative number otherwise
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*/
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int ff_v4l2_m2m_codec_reinit(V4L2m2mContext *ctx);
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/**
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* Reinitializes the V4L2m2mContext when the driver cannot continue processing
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* with the any of the current V4L2Contexts (ie, changes in output and capture).
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*
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* @param[in] ctx The V4L2m2mContext instantiated by the encoder/decoder.
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*
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* @returns 0 in case of success, negative number otherwise
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*/
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int ff_v4l2_m2m_codec_full_reinit(V4L2m2mContext *ctx);
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#endif /* AVCODEC_V4L2_M2M_H */
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