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authorBrad <brad@comstyle.com>2011-03-26 19:03:41 -0400
committerAnton Khirnov <anton@khirnov.net>2011-03-27 10:46:45 +0200
commit15d59d2cea25cfd73bfe6ea03a498a62e24d0536 (patch)
tree31f6d5e915ceae3a7a391bfd4d8eaba7b77b25c4 /libavdevice/sndio_dec.c
parent1500be13f204acb7e74dac4325ef0052576fa2a9 (diff)
downloadffmpeg-15d59d2cea25cfd73bfe6ea03a498a62e24d0536.tar.gz
sndio support for playback and record
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Diffstat (limited to 'libavdevice/sndio_dec.c')
-rw-r--r--libavdevice/sndio_dec.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/libavdevice/sndio_dec.c b/libavdevice/sndio_dec.c
new file mode 100644
index 0000000000..ff2adeb0af
--- /dev/null
+++ b/libavdevice/sndio_dec.c
@@ -0,0 +1,108 @@
+/*
+ * sndio play and grab interface
+ * Copyright (c) 2010 Jacob Meuser
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <sndio.h>
+
+#include "libavformat/avformat.h"
+
+#include "sndio_common.h"
+
+static av_cold int audio_read_header(AVFormatContext *s1,
+ AVFormatParameters *ap)
+{
+ SndioData *s = s1->priv_data;
+ AVStream *st;
+ int ret;
+
+ if (ap->sample_rate <= 0 || ap->channels <= 0)
+ return AVERROR(EINVAL);
+
+ st = av_new_stream(s1, 0);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ s->sample_rate = ap->sample_rate;
+ s->channels = ap->channels;
+
+ ret = ff_sndio_open(s1, 0, s1->filename);
+ if (ret < 0)
+ return ret;
+
+ /* take real parameters */
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = s->codec_id;
+ st->codec->sample_rate = s->sample_rate;
+ st->codec->channels = s->channels;
+
+ av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+
+ return 0;
+}
+
+static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+ SndioData *s = s1->priv_data;
+ int64_t bdelay, cur_time;
+ int ret;
+
+ if ((ret = av_new_packet(pkt, s->buffer_size)) < 0)
+ return ret;
+
+ ret = sio_read(s->hdl, pkt->data, pkt->size);
+ if (ret == 0 || sio_eof(s->hdl)) {
+ av_free_packet(pkt);
+ return AVERROR_EOF;
+ }
+
+ pkt->size = ret;
+ s->softpos += ret;
+
+ /* compute pts of the start of the packet */
+ cur_time = av_gettime();
+
+ bdelay = ret + s->hwpos - s->softpos;
+
+ /* convert to pts */
+ pkt->pts = cur_time - ((bdelay * 1000000) /
+ (s->bps * s->channels * s->sample_rate));
+
+ return 0;
+}
+
+static av_cold int audio_read_close(AVFormatContext *s1)
+{
+ SndioData *s = s1->priv_data;
+
+ ff_sndio_close(s);
+
+ return 0;
+}
+
+AVInputFormat ff_sndio_demuxer = {
+ .name = "sndio",
+ .long_name = NULL_IF_CONFIG_SMALL("sndio audio capture"),
+ .priv_data_size = sizeof(SndioData),
+ .read_header = audio_read_header,
+ .read_packet = audio_read_packet,
+ .read_close = audio_read_close,
+ .flags = AVFMT_NOFILE,
+};