GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavdevice/oss_enc.c Lines: 0 31 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 14 0.0 %

Line Branch Exec Source
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/*
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 * Linux audio grab interface
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 * Copyright (c) 2000, 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "config.h"
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include "libavutil/internal.h"
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#include "libavcodec/avcodec.h"
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#include "avdevice.h"
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#include "libavformat/internal.h"
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#include "oss.h"
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static int audio_write_header(AVFormatContext *s1)
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{
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    OSSAudioData *s = s1->priv_data;
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    AVStream *st;
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    int ret;
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    st = s1->streams[0];
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    s->sample_rate = st->codecpar->sample_rate;
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    s->channels = st->codecpar->channels;
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    ret = ff_oss_audio_open(s1, 1, s1->url);
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    if (ret < 0) {
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        return AVERROR(EIO);
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    } else {
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        return 0;
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    }
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}
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static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
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{
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    OSSAudioData *s = s1->priv_data;
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    int len, ret;
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    int size= pkt->size;
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    uint8_t *buf= pkt->data;
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    while (size > 0) {
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        len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size);
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        memcpy(s->buffer + s->buffer_ptr, buf, len);
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        s->buffer_ptr += len;
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        if (s->buffer_ptr >= OSS_AUDIO_BLOCK_SIZE) {
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            for(;;) {
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                ret = write(s->fd, s->buffer, OSS_AUDIO_BLOCK_SIZE);
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                if (ret > 0)
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                    break;
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                if (ret < 0 && (errno != EAGAIN && errno != EINTR))
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                    return AVERROR(EIO);
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            }
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            s->buffer_ptr = 0;
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        }
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        buf += len;
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        size -= len;
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    }
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    return 0;
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}
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static int audio_write_trailer(AVFormatContext *s1)
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{
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    OSSAudioData *s = s1->priv_data;
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    ff_oss_audio_close(s);
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    return 0;
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}
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static const AVClass oss_muxer_class = {
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    .class_name     = "OSS outdev",
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    .item_name      = av_default_item_name,
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    .version        = LIBAVUTIL_VERSION_INT,
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    .category       = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
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};
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AVOutputFormat ff_oss_muxer = {
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    .name           = "oss",
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    .long_name      = NULL_IF_CONFIG_SMALL("OSS (Open Sound System) playback"),
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    .priv_data_size = sizeof(OSSAudioData),
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    /* XXX: we make the assumption that the soundcard accepts this format */
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    /* XXX: find better solution with "preinit" method, needed also in
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       other formats */
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    .audio_codec    = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
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    .video_codec    = AV_CODEC_ID_NONE,
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    .write_header   = audio_write_header,
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    .write_packet   = audio_write_packet,
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    .write_trailer  = audio_write_trailer,
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    .flags          = AVFMT_NOFILE,
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    .priv_class     = &oss_muxer_class,
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};