oss_audio: Split muxer and demuxer

Signed-off-by: Diego Biurrun <diego@biurrun.de>

1 files changed, 108 insertions, 0 deletions

diff --git a/libavdevice/oss_audio_enc.c b/libavdevice/oss_audio_enc.c
new file mode 100644
index 0000000000..688982a00f
--- /dev/null
+++ b/libavdevice/oss_audio_enc.c
@@ -0,0 +1,108 @@
+/*
+ * Linux audio grab interface
+ * Copyright (c) 2000, 2001 Fabrice Bellard
+ *
+ * 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 "config.h"
+
+#if HAVE_SOUNDCARD_H
+#include <soundcard.h>
+#else
+#include <sys/soundcard.h>
+#endif
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include "libavutil/internal.h"
+
+#include "libavcodec/avcodec.h"
+
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
+
+#include "oss_audio.h"
+
+static int audio_write_header(AVFormatContext *s1)
+{
+    OSSAudioData *s = s1->priv_data;
+    AVStream *st;
+    int ret;
+
+    st = s1->streams[0];
+    s->sample_rate = st->codec->sample_rate;
+    s->channels = st->codec->channels;
+    ret = ff_oss_audio_open(s1, 1, s1->filename);
+    if (ret < 0) {
+        return AVERROR(EIO);
+    } else {
+        return 0;
+    }
+}
+
+static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    OSSAudioData *s = s1->priv_data;
+    int len, ret;
+    int size= pkt->size;
+    uint8_t *buf= pkt->data;
+
+    while (size > 0) {
+        len = FFMIN(OSS_AUDIO_BLOCK_SIZE - s->buffer_ptr, size);
+        memcpy(s->buffer + s->buffer_ptr, buf, len);
+        s->buffer_ptr += len;
+        if (s->buffer_ptr >= OSS_AUDIO_BLOCK_SIZE) {
+            for(;;) {
+                ret = write(s->fd, s->buffer, OSS_AUDIO_BLOCK_SIZE);
+                if (ret > 0)
+                    break;
+                if (ret < 0 && (errno != EAGAIN && errno != EINTR))
+                    return AVERROR(EIO);
+            }
+            s->buffer_ptr = 0;
+        }
+        buf += len;
+        size -= len;
+    }
+    return 0;
+}
+
+static int audio_write_trailer(AVFormatContext *s1)
+{
+    OSSAudioData *s = s1->priv_data;
+
+    ff_oss_audio_close(s);
+    return 0;
+}
+
+AVOutputFormat ff_oss_muxer = {
+    .name           = "oss",
+    .long_name      = NULL_IF_CONFIG_SMALL("OSS (Open Sound System) playback"),
+    .priv_data_size = sizeof(OSSAudioData),
+    /* XXX: we make the assumption that the soundcard accepts this format */
+    /* XXX: find better solution with "preinit" method, needed also in
+       other formats */
+    .audio_codec    = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
+    .video_codec    = AV_CODEC_ID_NONE,
+    .write_header   = audio_write_header,
+    .write_packet   = audio_write_packet,
+    .write_trailer  = audio_write_trailer,
+    .flags          = AVFMT_NOFILE,
+};