lavc: move bitstream filters into bsf/ subdir

2025-08-04 22:03:09 +02:00 · 2024-01-26 11:36:02 +01:00
parent e0da916b8f
commit 887a7817b6
45 changed files with 58 additions and 48 deletions
--- a/libavcodec/bsf/imx_dump_header.c
+++ b/libavcodec/bsf/imx_dump_header.c
@ -0,0 +1,76 @@
+/*
+ * 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 bitstream filter
+ * modifies bitstream to fit in mov and be decoded by final cut pro decoder
+ */
+
+#include "bsf.h"
+#include "bsf_internal.h"
+#include "bytestream.h"
+
+
+static int imx_dump_header(AVBSFContext *ctx, AVPacket *out)
+{
+    /* 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 };
+
+    AVPacket *in;
+    int ret = 0;
+    uint8_t *out_buf;
+
+    ret = ff_bsf_get_packet(ctx, &in);
+    if (ret < 0)
+        return ret;
+
+    ret = av_new_packet(out, in->size + 20);
+    if (ret < 0)
+        goto fail;
+
+    out_buf = out->data;
+
+    bytestream_put_buffer(&out_buf, imx_header, 16);
+    bytestream_put_byte(&out_buf, 0x83); /* KLV BER long form */
+    bytestream_put_be24(&out_buf, in->size);
+    bytestream_put_buffer(&out_buf, in->data, in->size);
+
+    ret = av_packet_copy_props(out, in);
+    if (ret < 0)
+        goto fail;
+
+fail:
+    if (ret < 0)
+        av_packet_unref(out);
+    av_packet_free(&in);
+    return ret;
+}
+
+static const enum AVCodecID codec_ids[] = {
+    AV_CODEC_ID_MPEG2VIDEO, AV_CODEC_ID_NONE,
+};
+
+const FFBitStreamFilter ff_imx_dump_header_bsf = {
+    .p.name      = "imxdump",
+    .p.codec_ids = codec_ids,
+    .filter      = imx_dump_header,
+};