split voc.c into vocdec.c and vocenc.c

Originally committed as revision 7145 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 121 insertions, 0 deletions

diff --git a/libavformat/vocenc.c b/libavformat/vocenc.c
new file mode 100644
index 0000000000..64e8ccf473
--- /dev/null
+++ b/libavformat/vocenc.c
@@ -0,0 +1,121 @@
+/*
+ * Creative Voice File muxer.
+ * Copyright (c) 2006  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "avformat.h"
+#include "riff.h"    /* for CodecTag */
+#include "voc.h"
+
+
+static const unsigned char voc_magic[] = "Creative Voice File\x1A";
+
+static const CodecTag voc_codec_tags[] = {
+    {CODEC_ID_PCM_U8,        0x00},
+    {CODEC_ID_ADPCM_SBPRO_4, 0x01},
+    {CODEC_ID_ADPCM_SBPRO_3, 0x02},
+    {CODEC_ID_ADPCM_SBPRO_2, 0x03},
+    {CODEC_ID_PCM_S16LE,     0x04},
+    {CODEC_ID_PCM_ALAW,      0x06},
+    {CODEC_ID_PCM_MULAW,     0x07},
+    {CODEC_ID_ADPCM_CT,    0x0200},
+    {0, 0},
+};
+
+
+typedef struct voc_enc_context {
+    int param_written;
+} voc_enc_context_t;
+
+static int voc_write_header(AVFormatContext *s)
+{
+    ByteIOContext *pb = &s->pb;
+    const int header_size = 26;
+    const int version = 0x0114;
+
+    if (s->nb_streams != 1
+        || s->streams[0]->codec->codec_type != CODEC_TYPE_AUDIO)
+        return AVERROR_NOTSUPP;
+
+    put_buffer(pb, voc_magic, sizeof(voc_magic) - 1);
+    put_le16(pb, header_size);
+    put_le16(pb, version);
+    put_le16(pb, ~version + 0x1234);
+
+    return 0;
+}
+
+static int voc_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    voc_enc_context_t *voc = s->priv_data;
+    AVCodecContext *enc = s->streams[0]->codec;
+    ByteIOContext *pb = &s->pb;
+
+    if (!voc->param_written) {
+        int format = codec_get_tag(voc_codec_tags, enc->codec_id);
+
+        if (format > 0xFF) {
+            put_byte(pb, VOC_TYPE_NEW_VOICE_DATA);
+            put_le24(pb, pkt->size + 12);
+            put_le32(pb, enc->sample_rate);
+            put_byte(pb, enc->bits_per_sample);
+            put_byte(pb, enc->channels);
+            put_le16(pb, format);
+            put_le32(pb, 0);
+        } else {
+            if (s->streams[0]->codec->channels > 1) {
+                put_byte(pb, VOC_TYPE_EXTENDED);
+                put_le24(pb, 4);
+                put_le16(pb, 65536-256000000/(enc->sample_rate*enc->channels));
+                put_byte(pb, format);
+                put_byte(pb, enc->channels - 1);
+            }
+            put_byte(pb, VOC_TYPE_VOICE_DATA);
+            put_le24(pb, pkt->size + 2);
+            put_byte(pb, 256 - 1000000 / enc->sample_rate);
+            put_byte(pb, format);
+        }
+        voc->param_written = 1;
+    } else {
+        put_byte(pb, VOC_TYPE_VOICE_DATA_CONT);
+        put_le24(pb, pkt->size);
+    }
+
+    put_buffer(pb, pkt->data, pkt->size);
+    return 0;
+}
+
+static int voc_write_trailer(AVFormatContext *s)
+{
+    put_byte(&s->pb, 0);
+    return 0;
+}
+
+AVOutputFormat voc_muxer = {
+    "voc",
+    "Creative Voice File format",
+    "audio/x-voc",
+    "voc",
+    sizeof(voc_enc_context_t),
+    CODEC_ID_PCM_U8,
+    CODEC_ID_NONE,
+    voc_write_header,
+    voc_write_packet,
+    voc_write_trailer,
+};