move imx_dump_header bitstream filter in its own file

Originally committed as revision 9067 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 59 insertions, 0 deletions

diff --git a/libavcodec/imx_dump_header_bsf.c b/libavcodec/imx_dump_header_bsf.c
new file mode 100644
index 0000000000..5a844407bb
--- /dev/null
+++ b/libavcodec/imx_dump_header_bsf.c
@@ -0,0 +1,59 @@
+/*
+ * imx dump header bitstream filter
+ * Copyright (c) 2007 Baptiste Coudurier.
+ *
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file imx_dump_header_bsf.c
+ * imx dump header bitstream filter
+ * modifies bitstream to fit in mov and be decoded by final cut pro decoder
+ */
+
+#include "avcodec.h"
+#include "bytestream.h"
+
+
+static int imx_dump_header(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
+                           uint8_t **poutbuf, int *poutbuf_size,
+                           const uint8_t *buf, int buf_size, int keyframe)
+{
+    /* MXF essence element key */
+    static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 };
+    uint8_t *poutbufp;
+
+    if (avctx->codec_id != CODEC_ID_MPEG2VIDEO) {
+        av_log(avctx, AV_LOG_ERROR, "imx bitstream filter only applies to mpeg2video codec\n");
+        return 0;
+    }
+
+    *poutbuf = av_malloc(buf_size + 20 + FF_INPUT_BUFFER_PADDING_SIZE);
+    poutbufp = *poutbuf;
+    bytestream_put_buffer(&poutbufp, imx_header, 16);
+    bytestream_put_byte(&poutbufp, 0x83); /* KLV BER long form */
+    bytestream_put_be24(&poutbufp, buf_size);
+    bytestream_put_buffer(&poutbufp, buf, buf_size);
+    *poutbuf_size = poutbufp - *poutbuf;
+    return 1;
+}
+
+AVBitStreamFilter imx_dump_header_bsf = {
+    "imxdump",
+    0,
+    imx_dump_header,
+};