avformat/utils: Move ff_get_packet_palette() to rawutils.c

ff_get_packet_palette() and ff_reshuffle_raw_rgb() belong together:
E.g. the former takes the return value of the latter as argument.
So move ff_get_packet_palette() to rawutils.c (which consists solely
of ff_reshuffle_raw_rgb()).
Also add a separate header for these two functions.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/libavformat/rawutils.h b/libavformat/rawutils.h
new file mode 100644
index 0000000000..a91123412b
--- /dev/null
+++ b/libavformat/rawutils.h
@@ -0,0 +1,56 @@
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * 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
+ */
+
+#ifndef AVFORMAT_RAWUTILS_H
+#define AVFORMAT_RAWUTILS_H
+
+#include <stdint.h>
+#include "libavcodec/codec_par.h"
+#include "libavcodec/packet.h"
+#include "avformat.h"
+
+#define CONTAINS_PAL 2
+/**
+ * Reshuffles the lines to use the user specified stride.
+ *
+ * @param ppkt input and output packet
+ * @return negative error code or
+ *         0 if no new packet was allocated
+ *         non-zero if a new packet was allocated and ppkt has to be freed
+ *         CONTAINS_PAL if in addition to a new packet the old contained a palette
+ */
+int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
+
+/**
+ * Retrieves the palette from a packet, either from side data, or
+ * appended to the video data in the packet itself (raw video only).
+ * It is commonly used after a call to ff_reshuffle_raw_rgb().
+ *
+ * Use 0 for the ret parameter to check for side data only.
+ *
+ * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
+ * @param ret return value from ff_reshuffle_raw_rgb(), or 0
+ * @param palette pointer to palette buffer
+ * @return negative error code or
+ *         1 if the packet has a palette, else 0
+ */
+int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
+
+#endif /* AVFORMAT_RAWUTILS_H */