libavformat/rawutils.h

   1 /*
   2  * copyright (c) 2001 Fabrice Bellard
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVFORMAT_RAWUTILS_H
  22 #define AVFORMAT_RAWUTILS_H
  23
  24 #include <stdint.h>
  25 #include "libavcodec/codec_par.h"
  26 #include "libavcodec/packet.h"
  27 #include "avformat.h"
  28
  29 #define CONTAINS_PAL 2
  30 /**
  31  * Reshuffles the lines to use the user specified stride.
  32  *
  33  * @param ppkt input and output packet
  34  * @return negative error code or
  35  *         0 if no new packet was allocated
  36  *         non-zero if a new packet was allocated and ppkt has to be freed
  37  *         CONTAINS_PAL if in addition to a new packet the old contained a palette
  38  */
  39 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
  40
  41 /**
  42  * Retrieves the palette from a packet, either from side data, or
  43  * appended to the video data in the packet itself (raw video only).
  44  * It is commonly used after a call to ff_reshuffle_raw_rgb().
  45  *
  46  * Use 0 for the ret parameter to check for side data only.
  47  *
  48  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
  49  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
  50  * @param palette pointer to palette buffer
  51  * @return negative error code or
  52  *         1 if the packet has a palette, else 0
  53  */
  54 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
  55
  56 #endif /* AVFORMAT_RAWUTILS_H */