sndio support for playback and record

Signed-off-by: Anton Khirnov <anton@khirnov.net>

1 files changed, 120 insertions, 0 deletions

diff --git a/libavdevice/sndio_common.c b/libavdevice/sndio_common.c
new file mode 100644
index 0000000000..60b7970051
--- /dev/null
+++ b/libavdevice/sndio_common.c
@@ -0,0 +1,120 @@
+/*
+ * 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 inline void movecb(void *addr, int delta)
+{
+    SndioData *s = addr;
+
+    s->hwpos += delta * s->channels * s->bps;
+}
+
+av_cold int ff_sndio_open(AVFormatContext *s1, int is_output,
+                          const char *audio_device)
+{
+    SndioData *s = s1->priv_data;
+    struct sio_hdl *hdl;
+    struct sio_par par;
+
+    hdl = sio_open(audio_device, is_output ? SIO_PLAY : SIO_REC, 0);
+    if (!hdl) {
+        av_log(s1, AV_LOG_ERROR, "Could not open sndio device\n");
+        return AVERROR(EIO);
+    }
+
+    sio_initpar(&par);
+
+    par.bits = 16;
+    par.sig  = 1;
+    par.le   = SIO_LE_NATIVE;
+
+    if (is_output)
+        par.pchan = s->channels;
+    else
+        par.rchan = s->channels;
+    par.rate = s->sample_rate;
+
+    if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) {
+        av_log(s1, AV_LOG_ERROR, "Impossible to set sndio parameters, "
+               "channels: %d sample rate: %d\n", s->channels, s->sample_rate);
+        goto fail;
+    }
+
+    if (par.bits != 16 || par.sig != 1 || par.le != SIO_LE_NATIVE ||
+        (is_output  && (par.pchan != s->channels)) ||
+        (!is_output && (par.rchan != s->channels)) ||
+        (par.rate != s->sample_rate)) {
+        av_log(s1, AV_LOG_ERROR, "Could not set appropriate sndio parameters, "
+               "channels: %d sample rate: %d\n", s->channels, s->sample_rate);
+        goto fail;
+    }
+
+    s->buffer_size = par.round * par.bps *
+                     (is_output ? par.pchan : par.rchan);
+
+    if (is_output) {
+        s->buffer = av_malloc(s->buffer_size);
+        if (!s->buffer) {
+            av_log(s1, AV_LOG_ERROR, "Could not allocate buffer\n");
+            goto fail;
+        }
+    }
+
+    s->codec_id    = par.le ? CODEC_ID_PCM_S16LE : CODEC_ID_PCM_S16BE;
+    s->channels    = is_output ? par.pchan : par.rchan;
+    s->sample_rate = par.rate;
+    s->bps         = par.bps;
+
+    sio_onmove(hdl, movecb, s);
+
+    if (!sio_start(hdl)) {
+        av_log(s1, AV_LOG_ERROR, "Could not start sndio\n");
+        goto fail;
+    }
+
+    s->hdl = hdl;
+
+    return 0;
+
+fail:
+    av_freep(&s->buffer);
+
+    if (hdl)
+        sio_close(hdl);
+
+    return AVERROR(EIO);
+}
+
+int ff_sndio_close(SndioData *s)
+{
+    av_freep(&s->buffer);
+
+    if (s->hdl)
+        sio_close(s->hdl);
+
+    return 0;
+}