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