blob: d8076eae5472ac9fbe53d5420d1f07c6bbd0199f
1 | /* |
2 | * Audio Frame Queue |
3 | * Copyright (c) 2012 Justin Ruggles |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | #ifndef AVCODEC_AUDIO_FRAME_QUEUE_H |
23 | #define AVCODEC_AUDIO_FRAME_QUEUE_H |
24 | |
25 | #include "avcodec.h" |
26 | |
27 | typedef struct AudioFrame { |
28 | int64_t pts; |
29 | int duration; |
30 | } AudioFrame; |
31 | |
32 | typedef struct AudioFrameQueue { |
33 | AVCodecContext *avctx; |
34 | int remaining_delay; |
35 | int remaining_samples; |
36 | AudioFrame *frames; |
37 | unsigned frame_count; |
38 | unsigned frame_alloc; |
39 | } AudioFrameQueue; |
40 | |
41 | /** |
42 | * Initialize AudioFrameQueue. |
43 | * |
44 | * @param avctx context to use for time_base and av_log |
45 | * @param afq queue context |
46 | */ |
47 | void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq); |
48 | |
49 | /** |
50 | * Close AudioFrameQueue. |
51 | * |
52 | * Frees memory if needed. |
53 | * |
54 | * @param afq queue context |
55 | */ |
56 | void ff_af_queue_close(AudioFrameQueue *afq); |
57 | |
58 | /** |
59 | * Add a frame to the queue. |
60 | * |
61 | * @param afq queue context |
62 | * @param f frame to add to the queue |
63 | */ |
64 | int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f); |
65 | |
66 | /** |
67 | * Remove frame(s) from the queue. |
68 | * |
69 | * Retrieves the pts of the next available frame, or a generated pts based on |
70 | * the last frame duration if there are no frames left in the queue. The number |
71 | * of requested samples should be the full number of samples represented by the |
72 | * packet that will be output by the encoder. If fewer samples are available |
73 | * in the queue, a smaller value will be used for the output duration. |
74 | * |
75 | * @param afq queue context |
76 | * @param nb_samples number of samples to remove from the queue |
77 | * @param[out] pts output packet pts |
78 | * @param[out] duration output packet duration |
79 | */ |
80 | void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts, |
81 | int64_t *duration); |
82 | |
83 | #endif /* AVCODEC_AUDIO_FRAME_QUEUE_H */ |
84 |