| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * generic encoding-related code | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #ifndef AVCODEC_ENCODE_H | ||
| 22 | #define AVCODEC_ENCODE_H | ||
| 23 | |||
| 24 | #include "libavutil/frame.h" | ||
| 25 | |||
| 26 | #include "avcodec.h" | ||
| 27 | #include "packet.h" | ||
| 28 | |||
| 29 | /** | ||
| 30 | * Used by some encoders as upper bound for the length of headers. | ||
| 31 | * TODO: Use proper codec-specific upper bounds. | ||
| 32 | */ | ||
| 33 | #define FF_INPUT_BUFFER_MIN_SIZE 16384 | ||
| 34 | |||
| 35 | /** | ||
| 36 | * Called by encoders to get the next frame for encoding. | ||
| 37 | * | ||
| 38 | * @param frame An empty frame to be filled with data. | ||
| 39 | * @return 0 if a new reference has been successfully written to frame | ||
| 40 | * AVERROR(EAGAIN) if no data is currently available | ||
| 41 | * AVERROR_EOF if end of stream has been reached, so no more data | ||
| 42 | * will be available | ||
| 43 | */ | ||
| 44 | int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame); | ||
| 45 | |||
| 46 | /** | ||
| 47 | * Get a buffer for a packet. This is a wrapper around | ||
| 48 | * AVCodecContext.get_encode_buffer() and should be used instead calling get_encode_buffer() | ||
| 49 | * directly. | ||
| 50 | */ | ||
| 51 | int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags); | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Allocate buffers for a frame. Encoder equivalent to ff_get_buffer(). | ||
| 55 | */ | ||
| 56 | int ff_encode_alloc_frame(AVCodecContext *avctx, AVFrame *frame); | ||
| 57 | |||
| 58 | /** | ||
| 59 | * Check AVPacket size and allocate data. | ||
| 60 | * | ||
| 61 | * Encoders of type FF_CODEC_CB_TYPE_ENCODE can use this as a convenience to | ||
| 62 | * obtain a big enough buffer for the encoded bitstream. | ||
| 63 | * | ||
| 64 | * @param avctx the AVCodecContext of the encoder | ||
| 65 | * @param avpkt The AVPacket: on success, avpkt->data will point to a buffer | ||
| 66 | * of size at least `size`; the packet will not be refcounted. | ||
| 67 | * This packet must be initially blank. | ||
| 68 | * @param size an upper bound of the size of the packet to encode | ||
| 69 | * @return non negative on success, negative error code on failure | ||
| 70 | */ | ||
| 71 | int ff_alloc_packet(AVCodecContext *avctx, AVPacket *avpkt, int64_t size); | ||
| 72 | |||
| 73 | /** | ||
| 74 | * Propagate user opaque values from the frame to avctx/pkt as needed. | ||
| 75 | */ | ||
| 76 | int ff_encode_reordered_opaque(AVCodecContext *avctx, | ||
| 77 | AVPacket *pkt, const AVFrame *frame); | ||
| 78 | |||
| 79 | int ff_encode_encode_cb(AVCodecContext *avctx, AVPacket *avpkt, | ||
| 80 | AVFrame *frame, int *got_packet); | ||
| 81 | |||
| 82 | /** | ||
| 83 | * Add a CPB properties side data to an encoding context. | ||
| 84 | */ | ||
| 85 | AVCPBProperties *ff_encode_add_cpb_side_data(AVCodecContext *avctx); | ||
| 86 | |||
| 87 | /** | ||
| 88 | * Rescale from sample rate to AVCodecContext.time_base. | ||
| 89 | */ | ||
| 90 | 29858 | static av_always_inline int64_t ff_samples_to_time_base(const AVCodecContext *avctx, | |
| 91 | int64_t samples) | ||
| 92 | { | ||
| 93 |
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29858 | if (samples == AV_NOPTS_VALUE) |
| 94 | ✗ | return AV_NOPTS_VALUE; | |
| 95 | 29858 | return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate }, | |
| 96 | avctx->time_base); | ||
| 97 | } | ||
| 98 | |||
| 99 | #endif /* AVCODEC_ENCODE_H */ | ||
| 100 |