blob: 47f500d71e515195872b39e474ab3844377092da
| 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 "libavutil/internal.h" |
| 26 | |
| 27 | |
| 28 | #include "libavdevice/avdevice.h" |
| 29 | #include "libavdevice/sndio.h" |
| 30 | |
| 31 | static av_cold int audio_write_header(AVFormatContext *s1) |
| 32 | { |
| 33 | SndioData *s = s1->priv_data; |
| 34 | AVStream *st; |
| 35 | int ret; |
| 36 | |
| 37 | st = s1->streams[0]; |
| 38 | s->sample_rate = st->codecpar->sample_rate; |
| 39 | s->channels = st->codecpar->channels; |
| 40 | |
| 41 | ret = ff_sndio_open(s1, 1, s1->filename); |
| 42 | |
| 43 | return ret; |
| 44 | } |
| 45 | |
| 46 | static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt) |
| 47 | { |
| 48 | SndioData *s = s1->priv_data; |
| 49 | uint8_t *buf= pkt->data; |
| 50 | int size = pkt->size; |
| 51 | int len, ret; |
| 52 | |
| 53 | while (size > 0) { |
| 54 | len = FFMIN(s->buffer_size - s->buffer_offset, size); |
| 55 | memcpy(s->buffer + s->buffer_offset, buf, len); |
| 56 | buf += len; |
| 57 | size -= len; |
| 58 | s->buffer_offset += len; |
| 59 | if (s->buffer_offset >= s->buffer_size) { |
| 60 | ret = sio_write(s->hdl, s->buffer, s->buffer_size); |
| 61 | if (ret == 0 || sio_eof(s->hdl)) |
| 62 | return AVERROR(EIO); |
| 63 | s->softpos += ret; |
| 64 | s->buffer_offset = 0; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static int audio_write_trailer(AVFormatContext *s1) |
| 72 | { |
| 73 | SndioData *s = s1->priv_data; |
| 74 | |
| 75 | sio_write(s->hdl, s->buffer, s->buffer_offset); |
| 76 | |
| 77 | ff_sndio_close(s); |
| 78 | |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static const AVClass sndio_muxer_class = { |
| 83 | .class_name = "sndio outdev", |
| 84 | .item_name = av_default_item_name, |
| 85 | .version = LIBAVUTIL_VERSION_INT, |
| 86 | .category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT, |
| 87 | }; |
| 88 | |
| 89 | AVOutputFormat ff_sndio_muxer = { |
| 90 | .name = "sndio", |
| 91 | .long_name = NULL_IF_CONFIG_SMALL("sndio audio playback"), |
| 92 | .priv_data_size = sizeof(SndioData), |
| 93 | /* XXX: we make the assumption that the soundcard accepts this format */ |
| 94 | /* XXX: find better solution with "preinit" method, needed also in |
| 95 | other formats */ |
| 96 | .audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), |
| 97 | .video_codec = AV_CODEC_ID_NONE, |
| 98 | .write_header = audio_write_header, |
| 99 | .write_packet = audio_write_packet, |
| 100 | .write_trailer = audio_write_trailer, |
| 101 | .flags = AVFMT_NOFILE, |
| 102 | .priv_class = &sndio_muxer_class, |
| 103 | }; |
| 104 |