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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 | * avcodec_receive_frame() implementation for encoders. | ||
31 | */ | ||
32 | int ff_encode_receive_frame(AVCodecContext *avctx, AVFrame *frame); | ||
33 | |||
34 | /** | ||
35 | * Called by encoders to get the next frame for encoding. | ||
36 | * | ||
37 | * @param frame An empty frame to be filled with data. | ||
38 | * @return 0 if a new reference has been successfully written to frame | ||
39 | * AVERROR(EAGAIN) if no data is currently available | ||
40 | * AVERROR_EOF if end of stream has been reached, so no more data | ||
41 | * will be available | ||
42 | */ | ||
43 | int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame); | ||
44 | |||
45 | /** | ||
46 | * Get a buffer for a packet. This is a wrapper around | ||
47 | * AVCodecContext.get_encode_buffer() and should be used instead calling get_encode_buffer() | ||
48 | * directly. | ||
49 | */ | ||
50 | int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags); | ||
51 | |||
52 | /** | ||
53 | * Allocate buffers for a frame. Encoder equivalent to ff_get_buffer(). | ||
54 | */ | ||
55 | int ff_encode_alloc_frame(AVCodecContext *avctx, AVFrame *frame); | ||
56 | |||
57 | /** | ||
58 | * Check AVPacket size and allocate data. | ||
59 | * | ||
60 | * Encoders of type FF_CODEC_CB_TYPE_ENCODE can use this as a convenience to | ||
61 | * obtain a big enough buffer for the encoded bitstream. | ||
62 | * | ||
63 | * @param avctx the AVCodecContext of the encoder | ||
64 | * @param avpkt The AVPacket: on success, avpkt->data will point to a buffer | ||
65 | * of size at least `size`; the packet will not be refcounted. | ||
66 | * This packet must be initially blank. | ||
67 | * @param size an upper bound of the size of the packet to encode | ||
68 | * @return non negative on success, negative error code on failure | ||
69 | */ | ||
70 | int ff_alloc_packet(AVCodecContext *avctx, AVPacket *avpkt, int64_t size); | ||
71 | |||
72 | /** | ||
73 | * Propagate user opaque values from the frame to avctx/pkt as needed. | ||
74 | */ | ||
75 | int ff_encode_reordered_opaque(AVCodecContext *avctx, | ||
76 | AVPacket *pkt, const AVFrame *frame); | ||
77 | |||
78 | /* | ||
79 | * Perform encoder initialization and validation. | ||
80 | * Called when opening the encoder, before the FFCodec.init() call. | ||
81 | */ | ||
82 | int ff_encode_preinit(AVCodecContext *avctx); | ||
83 | |||
84 | int ff_encode_encode_cb(AVCodecContext *avctx, AVPacket *avpkt, | ||
85 | AVFrame *frame, int *got_packet); | ||
86 | |||
87 | /** | ||
88 | * Rescale from sample rate to AVCodecContext.time_base. | ||
89 | */ | ||
90 | 29388 | static av_always_inline int64_t ff_samples_to_time_base(const AVCodecContext *avctx, | |
91 | int64_t samples) | ||
92 | { | ||
93 |
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29388 | if (samples == AV_NOPTS_VALUE) |
94 | ✗ | return AV_NOPTS_VALUE; | |
95 | 29388 | return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate }, | |
96 | avctx->time_base); | ||
97 | } | ||
98 | |||
99 | #endif /* AVCODEC_ENCODE_H */ | ||
100 |