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2ba45a60 DM |
1 | /* |
2 | * sndio play and grab interface | |
3 | * Copyright (c) 2010 Jacob Meuser | |
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 | #include <stdint.h> | |
23 | #include <sndio.h> | |
24 | ||
25 | #include "avdevice.h" | |
26 | #include "sndio_common.h" | |
27 | ||
28 | static av_cold int audio_write_header(AVFormatContext *s1) | |
29 | { | |
30 | SndioData *s = s1->priv_data; | |
31 | AVStream *st; | |
32 | int ret; | |
33 | ||
34 | st = s1->streams[0]; | |
35 | s->sample_rate = st->codec->sample_rate; | |
36 | s->channels = st->codec->channels; | |
37 | ||
38 | ret = ff_sndio_open(s1, 1, s1->filename); | |
39 | ||
40 | return ret; | |
41 | } | |
42 | ||
43 | static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt) | |
44 | { | |
45 | SndioData *s = s1->priv_data; | |
46 | uint8_t *buf= pkt->data; | |
47 | int size = pkt->size; | |
48 | int len, ret; | |
49 | ||
50 | while (size > 0) { | |
51 | len = FFMIN(s->buffer_size - s->buffer_offset, size); | |
52 | memcpy(s->buffer + s->buffer_offset, buf, len); | |
53 | buf += len; | |
54 | size -= len; | |
55 | s->buffer_offset += len; | |
56 | if (s->buffer_offset >= s->buffer_size) { | |
57 | ret = sio_write(s->hdl, s->buffer, s->buffer_size); | |
58 | if (ret == 0 || sio_eof(s->hdl)) | |
59 | return AVERROR(EIO); | |
60 | s->softpos += ret; | |
61 | s->buffer_offset = 0; | |
62 | } | |
63 | } | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static int audio_write_trailer(AVFormatContext *s1) | |
69 | { | |
70 | SndioData *s = s1->priv_data; | |
71 | ||
72 | sio_write(s->hdl, s->buffer, s->buffer_offset); | |
73 | ||
74 | ff_sndio_close(s); | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static const AVClass sndio_muxer_class = { | |
80 | .class_name = "sndio outdev", | |
81 | .item_name = av_default_item_name, | |
82 | .version = LIBAVUTIL_VERSION_INT, | |
83 | .category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT, | |
84 | }; | |
85 | ||
86 | AVOutputFormat ff_sndio_muxer = { | |
87 | .name = "sndio", | |
88 | .long_name = NULL_IF_CONFIG_SMALL("sndio audio playback"), | |
89 | .priv_data_size = sizeof(SndioData), | |
90 | /* XXX: we make the assumption that the soundcard accepts this format */ | |
91 | /* XXX: find better solution with "preinit" method, needed also in | |
92 | other formats */ | |
93 | .audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), | |
94 | .video_codec = AV_CODEC_ID_NONE, | |
95 | .write_header = audio_write_header, | |
96 | .write_packet = audio_write_packet, | |
97 | .write_trailer = audio_write_trailer, | |
98 | .flags = AVFMT_NOFILE, | |
99 | .priv_class = &sndio_muxer_class, | |
100 | }; |