mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/*
|
|
* generic encoding-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_ENCODE_H
|
|
#define AVCODEC_ENCODE_H
|
|
|
|
#include "libavutil/frame.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "packet.h"
|
|
|
|
/**
|
|
* avcodec_receive_frame() implementation for encoders.
|
|
*/
|
|
int ff_encode_receive_frame(AVCodecContext *avctx, AVFrame *frame);
|
|
|
|
/**
|
|
* Called by encoders to get the next frame for encoding.
|
|
*
|
|
* @param frame An empty frame to be filled with data.
|
|
* @return 0 if a new reference has been successfully written to frame
|
|
* AVERROR(EAGAIN) if no data is currently available
|
|
* AVERROR_EOF if end of stream has been reached, so no more data
|
|
* will be available
|
|
*/
|
|
int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame);
|
|
|
|
/**
|
|
* Get a buffer for a packet. This is a wrapper around
|
|
* AVCodecContext.get_encode_buffer() and should be used instead calling get_encode_buffer()
|
|
* directly.
|
|
*/
|
|
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags);
|
|
|
|
/**
|
|
* Allocate buffers for a frame. Encoder equivalent to ff_get_buffer().
|
|
*/
|
|
int ff_encode_alloc_frame(AVCodecContext *avctx, AVFrame *frame);
|
|
|
|
/**
|
|
* Check AVPacket size and allocate data.
|
|
*
|
|
* Encoders of type FF_CODEC_CB_TYPE_ENCODE can use this as a convenience to
|
|
* obtain a big enough buffer for the encoded bitstream.
|
|
*
|
|
* @param avctx the AVCodecContext of the encoder
|
|
* @param avpkt The AVPacket: on success, avpkt->data will point to a buffer
|
|
* of size at least `size`; the packet will not be refcounted.
|
|
* This packet must be initially blank.
|
|
* @param size an upper bound of the size of the packet to encode
|
|
* @return non negative on success, negative error code on failure
|
|
*/
|
|
int ff_alloc_packet(AVCodecContext *avctx, AVPacket *avpkt, int64_t size);
|
|
|
|
/**
|
|
* Propagate user opaque values from the frame to avctx/pkt as needed.
|
|
*/
|
|
int ff_encode_reordered_opaque(AVCodecContext *avctx,
|
|
AVPacket *pkt, const AVFrame *frame);
|
|
|
|
/*
|
|
* Perform encoder initialization and validation.
|
|
* Called when opening the encoder, before the FFCodec.init() call.
|
|
*/
|
|
int ff_encode_preinit(AVCodecContext *avctx);
|
|
|
|
int ff_encode_encode_cb(AVCodecContext *avctx, AVPacket *avpkt,
|
|
AVFrame *frame, int *got_packet);
|
|
|
|
/**
|
|
* Rescale from sample rate to AVCodecContext.time_base.
|
|
*/
|
|
static av_always_inline int64_t ff_samples_to_time_base(const AVCodecContext *avctx,
|
|
int64_t samples)
|
|
{
|
|
if (samples == AV_NOPTS_VALUE)
|
|
return AV_NOPTS_VALUE;
|
|
return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
|
|
avctx->time_base);
|
|
}
|
|
|
|
#endif /* AVCODEC_ENCODE_H */
|