mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
change gif muxer to simple gif encoder
Originally committed as revision 6874 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier
parent
1984f5cdc9
commit
93481fe5fe
@ -82,6 +82,7 @@ OBJS-$(CONFIG_FLIC_DECODER) += flicvideo.o
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OBJS-$(CONFIG_FOURXM_DECODER) += 4xm.o
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OBJS-$(CONFIG_FRAPS_DECODER) += fraps.o
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OBJS-$(CONFIG_GIF_DECODER) += gifdec.o lzw.o
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OBJS-$(CONFIG_GIF_ENCODER) += gif.o
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OBJS-$(CONFIG_H261_DECODER) += h261.o
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OBJS-$(CONFIG_H261_ENCODER) += h261.o
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OBJS-$(CONFIG_H264_DECODER) += h264.o
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@ -68,6 +68,9 @@ void avcodec_register_all(void)
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#ifdef CONFIG_FLAC_ENCODER
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register_avcodec(&flac_encoder);
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#endif
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#ifdef CONFIG_GIF_ENCODER
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register_avcodec(&gif_encoder);
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#endif
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#ifdef CONFIG_XVID
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#ifdef CONFIG_XVID_ENCODER
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register_avcodec(&xvid_encoder);
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@ -37,8 +37,8 @@ extern "C" {
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#define AV_STRINGIFY(s) AV_TOSTRING(s)
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#define AV_TOSTRING(s) #s
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#define LIBAVCODEC_VERSION_INT ((51<<16)+(23<<8)+0)
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#define LIBAVCODEC_VERSION 51.23.0
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#define LIBAVCODEC_VERSION_INT ((51<<16)+(24<<8)+0)
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#define LIBAVCODEC_VERSION 51.24.0
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#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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@ -2138,6 +2138,7 @@ extern AVCodec mp3lame_encoder;
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extern AVCodec oggvorbis_encoder;
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extern AVCodec faac_encoder;
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extern AVCodec flac_encoder;
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extern AVCodec gif_encoder;
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extern AVCodec xvid_encoder;
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extern AVCodec mpeg1video_encoder;
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extern AVCodec mpeg2video_encoder;
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@ -47,4 +47,29 @@ static always_inline unsigned int bytestream_get_buffer(uint8_t **b, uint8_t *ds
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return size;
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}
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static always_inline void bytestream_put_le32(uint8_t **b, const unsigned int value)
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{
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*(*b)++ = value;
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*(*b)++ = value >> 8;
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*(*b)++ = value >> 16;
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*(*b)++ = value >> 24;
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}
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static always_inline void bytestream_put_le16(uint8_t **b, const unsigned int value)
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{
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*(*b)++ = value;
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*(*b)++ = value >> 8;
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}
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static always_inline void bytestream_put_byte(uint8_t **b, const unsigned int value)
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{
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*(*b)++ = value;
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}
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static always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
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{
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memcpy(*b, src, size);
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(*b) += size;
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}
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#endif /* FFMPEG_BYTESTREAM_H */
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350
libavcodec/gif.c
Normal file
350
libavcodec/gif.c
Normal file
@ -0,0 +1,350 @@
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/*
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* GIF encoder.
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* Copyright (c) 2000 Fabrice Bellard.
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* Copyright (c) 2002 Francois Revol.
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* Copyright (c) 2006 Baptiste Coudurier.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* First version by Francois Revol revol@free.fr
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*
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* Features and limitations:
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* - currently no compression is performed,
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* in fact the size of the data is 9/8 the size of the image in 8bpp
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* - uses only a global standard palette
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* - tested with IE 5.0, Opera for BeOS, NetPositive (BeOS), and Mozilla (BeOS).
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*
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* Reference documents:
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* http://www.goice.co.jp/member/mo/formats/gif.html
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* http://astronomy.swin.edu.au/pbourke/dataformats/gif/
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* http://www.dcs.ed.ac.uk/home/mxr/gfx/2d/GIF89a.txt
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*
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* this url claims to have an LZW algorithm not covered by Unisys patent:
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* http://www.msg.net/utility/whirlgif/gifencod.html
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* could help reduce the size of the files _a lot_...
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* some sites mentions an RLE type compression also.
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*/
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#include "avcodec.h"
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#include "bytestream.h"
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#include "bitstream.h"
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/* bitstream minipacket size */
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#define GIF_CHUNKS 100
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/* slows down the decoding (and some browsers don't like it) */
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/* update on the 'some browsers don't like it issue from above: this was probably due to missing 'Data Sub-block Terminator' (byte 19) in the app_header */
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#define GIF_ADD_APP_HEADER // required to enable looping of animated gif
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typedef struct {
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unsigned char r;
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unsigned char g;
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unsigned char b;
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} rgb_triplet;
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/* we use the standard 216 color palette */
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/* this script was used to create the palette:
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* for r in 00 33 66 99 cc ff; do for g in 00 33 66 99 cc ff; do echo -n " "; for b in 00 33 66 99 cc ff; do
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* echo -n "{ 0x$r, 0x$g, 0x$b }, "; done; echo ""; done; done
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*/
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static const rgb_triplet gif_clut[216] = {
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{ 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x33 }, { 0x00, 0x00, 0x66 }, { 0x00, 0x00, 0x99 }, { 0x00, 0x00, 0xcc }, { 0x00, 0x00, 0xff },
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{ 0x00, 0x33, 0x00 }, { 0x00, 0x33, 0x33 }, { 0x00, 0x33, 0x66 }, { 0x00, 0x33, 0x99 }, { 0x00, 0x33, 0xcc }, { 0x00, 0x33, 0xff },
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{ 0x00, 0x66, 0x00 }, { 0x00, 0x66, 0x33 }, { 0x00, 0x66, 0x66 }, { 0x00, 0x66, 0x99 }, { 0x00, 0x66, 0xcc }, { 0x00, 0x66, 0xff },
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{ 0x00, 0x99, 0x00 }, { 0x00, 0x99, 0x33 }, { 0x00, 0x99, 0x66 }, { 0x00, 0x99, 0x99 }, { 0x00, 0x99, 0xcc }, { 0x00, 0x99, 0xff },
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{ 0x00, 0xcc, 0x00 }, { 0x00, 0xcc, 0x33 }, { 0x00, 0xcc, 0x66 }, { 0x00, 0xcc, 0x99 }, { 0x00, 0xcc, 0xcc }, { 0x00, 0xcc, 0xff },
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{ 0x00, 0xff, 0x00 }, { 0x00, 0xff, 0x33 }, { 0x00, 0xff, 0x66 }, { 0x00, 0xff, 0x99 }, { 0x00, 0xff, 0xcc }, { 0x00, 0xff, 0xff },
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{ 0x33, 0x00, 0x00 }, { 0x33, 0x00, 0x33 }, { 0x33, 0x00, 0x66 }, { 0x33, 0x00, 0x99 }, { 0x33, 0x00, 0xcc }, { 0x33, 0x00, 0xff },
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{ 0x33, 0x33, 0x00 }, { 0x33, 0x33, 0x33 }, { 0x33, 0x33, 0x66 }, { 0x33, 0x33, 0x99 }, { 0x33, 0x33, 0xcc }, { 0x33, 0x33, 0xff },
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{ 0x33, 0x66, 0x00 }, { 0x33, 0x66, 0x33 }, { 0x33, 0x66, 0x66 }, { 0x33, 0x66, 0x99 }, { 0x33, 0x66, 0xcc }, { 0x33, 0x66, 0xff },
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{ 0x33, 0x99, 0x00 }, { 0x33, 0x99, 0x33 }, { 0x33, 0x99, 0x66 }, { 0x33, 0x99, 0x99 }, { 0x33, 0x99, 0xcc }, { 0x33, 0x99, 0xff },
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{ 0x33, 0xcc, 0x00 }, { 0x33, 0xcc, 0x33 }, { 0x33, 0xcc, 0x66 }, { 0x33, 0xcc, 0x99 }, { 0x33, 0xcc, 0xcc }, { 0x33, 0xcc, 0xff },
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{ 0x33, 0xff, 0x00 }, { 0x33, 0xff, 0x33 }, { 0x33, 0xff, 0x66 }, { 0x33, 0xff, 0x99 }, { 0x33, 0xff, 0xcc }, { 0x33, 0xff, 0xff },
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{ 0x66, 0x00, 0x00 }, { 0x66, 0x00, 0x33 }, { 0x66, 0x00, 0x66 }, { 0x66, 0x00, 0x99 }, { 0x66, 0x00, 0xcc }, { 0x66, 0x00, 0xff },
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{ 0x66, 0x33, 0x00 }, { 0x66, 0x33, 0x33 }, { 0x66, 0x33, 0x66 }, { 0x66, 0x33, 0x99 }, { 0x66, 0x33, 0xcc }, { 0x66, 0x33, 0xff },
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{ 0x66, 0x66, 0x00 }, { 0x66, 0x66, 0x33 }, { 0x66, 0x66, 0x66 }, { 0x66, 0x66, 0x99 }, { 0x66, 0x66, 0xcc }, { 0x66, 0x66, 0xff },
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{ 0x66, 0x99, 0x00 }, { 0x66, 0x99, 0x33 }, { 0x66, 0x99, 0x66 }, { 0x66, 0x99, 0x99 }, { 0x66, 0x99, 0xcc }, { 0x66, 0x99, 0xff },
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{ 0x66, 0xcc, 0x00 }, { 0x66, 0xcc, 0x33 }, { 0x66, 0xcc, 0x66 }, { 0x66, 0xcc, 0x99 }, { 0x66, 0xcc, 0xcc }, { 0x66, 0xcc, 0xff },
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{ 0x66, 0xff, 0x00 }, { 0x66, 0xff, 0x33 }, { 0x66, 0xff, 0x66 }, { 0x66, 0xff, 0x99 }, { 0x66, 0xff, 0xcc }, { 0x66, 0xff, 0xff },
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{ 0x99, 0x00, 0x00 }, { 0x99, 0x00, 0x33 }, { 0x99, 0x00, 0x66 }, { 0x99, 0x00, 0x99 }, { 0x99, 0x00, 0xcc }, { 0x99, 0x00, 0xff },
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{ 0x99, 0x33, 0x00 }, { 0x99, 0x33, 0x33 }, { 0x99, 0x33, 0x66 }, { 0x99, 0x33, 0x99 }, { 0x99, 0x33, 0xcc }, { 0x99, 0x33, 0xff },
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{ 0x99, 0x66, 0x00 }, { 0x99, 0x66, 0x33 }, { 0x99, 0x66, 0x66 }, { 0x99, 0x66, 0x99 }, { 0x99, 0x66, 0xcc }, { 0x99, 0x66, 0xff },
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{ 0x99, 0x99, 0x00 }, { 0x99, 0x99, 0x33 }, { 0x99, 0x99, 0x66 }, { 0x99, 0x99, 0x99 }, { 0x99, 0x99, 0xcc }, { 0x99, 0x99, 0xff },
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{ 0x99, 0xcc, 0x00 }, { 0x99, 0xcc, 0x33 }, { 0x99, 0xcc, 0x66 }, { 0x99, 0xcc, 0x99 }, { 0x99, 0xcc, 0xcc }, { 0x99, 0xcc, 0xff },
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{ 0x99, 0xff, 0x00 }, { 0x99, 0xff, 0x33 }, { 0x99, 0xff, 0x66 }, { 0x99, 0xff, 0x99 }, { 0x99, 0xff, 0xcc }, { 0x99, 0xff, 0xff },
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{ 0xcc, 0x00, 0x00 }, { 0xcc, 0x00, 0x33 }, { 0xcc, 0x00, 0x66 }, { 0xcc, 0x00, 0x99 }, { 0xcc, 0x00, 0xcc }, { 0xcc, 0x00, 0xff },
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{ 0xcc, 0x33, 0x00 }, { 0xcc, 0x33, 0x33 }, { 0xcc, 0x33, 0x66 }, { 0xcc, 0x33, 0x99 }, { 0xcc, 0x33, 0xcc }, { 0xcc, 0x33, 0xff },
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{ 0xcc, 0x66, 0x00 }, { 0xcc, 0x66, 0x33 }, { 0xcc, 0x66, 0x66 }, { 0xcc, 0x66, 0x99 }, { 0xcc, 0x66, 0xcc }, { 0xcc, 0x66, 0xff },
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{ 0xcc, 0x99, 0x00 }, { 0xcc, 0x99, 0x33 }, { 0xcc, 0x99, 0x66 }, { 0xcc, 0x99, 0x99 }, { 0xcc, 0x99, 0xcc }, { 0xcc, 0x99, 0xff },
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{ 0xcc, 0xcc, 0x00 }, { 0xcc, 0xcc, 0x33 }, { 0xcc, 0xcc, 0x66 }, { 0xcc, 0xcc, 0x99 }, { 0xcc, 0xcc, 0xcc }, { 0xcc, 0xcc, 0xff },
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{ 0xcc, 0xff, 0x00 }, { 0xcc, 0xff, 0x33 }, { 0xcc, 0xff, 0x66 }, { 0xcc, 0xff, 0x99 }, { 0xcc, 0xff, 0xcc }, { 0xcc, 0xff, 0xff },
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{ 0xff, 0x00, 0x00 }, { 0xff, 0x00, 0x33 }, { 0xff, 0x00, 0x66 }, { 0xff, 0x00, 0x99 }, { 0xff, 0x00, 0xcc }, { 0xff, 0x00, 0xff },
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{ 0xff, 0x33, 0x00 }, { 0xff, 0x33, 0x33 }, { 0xff, 0x33, 0x66 }, { 0xff, 0x33, 0x99 }, { 0xff, 0x33, 0xcc }, { 0xff, 0x33, 0xff },
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{ 0xff, 0x66, 0x00 }, { 0xff, 0x66, 0x33 }, { 0xff, 0x66, 0x66 }, { 0xff, 0x66, 0x99 }, { 0xff, 0x66, 0xcc }, { 0xff, 0x66, 0xff },
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{ 0xff, 0x99, 0x00 }, { 0xff, 0x99, 0x33 }, { 0xff, 0x99, 0x66 }, { 0xff, 0x99, 0x99 }, { 0xff, 0x99, 0xcc }, { 0xff, 0x99, 0xff },
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{ 0xff, 0xcc, 0x00 }, { 0xff, 0xcc, 0x33 }, { 0xff, 0xcc, 0x66 }, { 0xff, 0xcc, 0x99 }, { 0xff, 0xcc, 0xcc }, { 0xff, 0xcc, 0xff },
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{ 0xff, 0xff, 0x00 }, { 0xff, 0xff, 0x33 }, { 0xff, 0xff, 0x66 }, { 0xff, 0xff, 0x99 }, { 0xff, 0xff, 0xcc }, { 0xff, 0xff, 0xff },
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};
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/* The GIF format uses reversed order for bitstreams... */
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/* at least they don't use PDP_ENDIAN :) */
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/* so we 'extend' PutBitContext. hmmm, OOP :) */
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/* seems this thing changed slightly since I wrote it... */
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#ifdef ALT_BITSTREAM_WRITER
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# error no ALT_BITSTREAM_WRITER support for now
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#endif
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static void gif_put_bits_rev(PutBitContext *s, int n, unsigned int value)
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{
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unsigned int bit_buf;
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int bit_cnt;
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// printf("put_bits=%d %x\n", n, value);
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assert(n == 32 || value < (1U << n));
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bit_buf = s->bit_buf;
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bit_cnt = 32 - s->bit_left; /* XXX:lazyness... was = s->bit_cnt; */
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// printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf);
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/* XXX: optimize */
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if (n < (32-bit_cnt)) {
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bit_buf |= value << (bit_cnt);
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bit_cnt+=n;
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} else {
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bit_buf |= value << (bit_cnt);
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*s->buf_ptr = bit_buf & 0xff;
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s->buf_ptr[1] = (bit_buf >> 8) & 0xff;
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s->buf_ptr[2] = (bit_buf >> 16) & 0xff;
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s->buf_ptr[3] = (bit_buf >> 24) & 0xff;
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//printf("bitbuf = %08x\n", bit_buf);
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s->buf_ptr+=4;
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if (s->buf_ptr >= s->buf_end)
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puts("bit buffer overflow !!"); // should never happen ! who got rid of the callback ???
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// flush_buffer_rev(s);
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bit_cnt=bit_cnt + n - 32;
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if (bit_cnt == 0) {
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bit_buf = 0;
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} else {
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bit_buf = value >> (n - bit_cnt);
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}
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}
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s->bit_buf = bit_buf;
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s->bit_left = 32 - bit_cnt;
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}
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/* pad the end of the output stream with zeros */
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static void gif_flush_put_bits_rev(PutBitContext *s)
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{
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while (s->bit_left < 32) {
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/* XXX: should test end of buffer */
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*s->buf_ptr++=s->bit_buf & 0xff;
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s->bit_buf>>=8;
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s->bit_left+=8;
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}
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// flush_buffer_rev(s);
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s->bit_left=32;
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s->bit_buf=0;
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}
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/* !RevPutBitContext */
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/* GIF header */
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static int gif_image_write_header(uint8_t **bytestream,
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int width, int height, int loop_count,
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uint32_t *palette)
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{
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int i;
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unsigned int v;
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bytestream_put_buffer(bytestream, "GIF", 3);
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bytestream_put_buffer(bytestream, "89a", 3);
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bytestream_put_le16(bytestream, width);
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bytestream_put_le16(bytestream, height);
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bytestream_put_byte(bytestream, 0xf7); /* flags: global clut, 256 entries */
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bytestream_put_byte(bytestream, 0x1f); /* background color index */
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bytestream_put_byte(bytestream, 0); /* aspect ratio */
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/* the global palette */
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if (!palette) {
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bytestream_put_buffer(bytestream, (const unsigned char *)gif_clut, 216*3);
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for(i=0;i<((256-216)*3);i++)
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bytestream_put_byte(bytestream, 0);
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} else {
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for(i=0;i<256;i++) {
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v = palette[i];
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bytestream_put_byte(bytestream, (v >> 16) & 0xff);
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bytestream_put_byte(bytestream, (v >> 8) & 0xff);
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bytestream_put_byte(bytestream, (v) & 0xff);
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}
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}
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/* update: this is the 'NETSCAPE EXTENSION' that allows for looped animated gif
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see http://members.aol.com/royalef/gifabout.htm#net-extension
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byte 1 : 33 (hex 0x21) GIF Extension code
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byte 2 : 255 (hex 0xFF) Application Extension Label
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byte 3 : 11 (hex (0x0B) Length of Application Block
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(eleven bytes of data to follow)
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bytes 4 to 11 : "NETSCAPE"
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bytes 12 to 14 : "2.0"
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byte 15 : 3 (hex 0x03) Length of Data Sub-Block
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(three bytes of data to follow)
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byte 16 : 1 (hex 0x01)
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bytes 17 to 18 : 0 to 65535, an unsigned integer in
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lo-hi byte format. This indicate the
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number of iterations the loop should
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be executed.
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bytes 19 : 0 (hex 0x00) a Data Sub-block Terminator
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*/
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/* application extension header */
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#ifdef GIF_ADD_APP_HEADER
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if (loop_count >= 0 && loop_count <= 65535) {
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bytestream_put_byte(bytestream, 0x21);
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bytestream_put_byte(bytestream, 0xff);
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bytestream_put_byte(bytestream, 0x0b);
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bytestream_put_buffer(bytestream, "NETSCAPE2.0", 11); // bytes 4 to 14
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bytestream_put_byte(bytestream, 0x03); // byte 15
|
||||
bytestream_put_byte(bytestream, 0x01); // byte 16
|
||||
bytestream_put_le16(bytestream, (uint16_t)loop_count);
|
||||
bytestream_put_byte(bytestream, 0x00); // byte 19
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* this is maybe slow, but allows for extensions */
|
||||
static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)
|
||||
{
|
||||
return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));
|
||||
}
|
||||
|
||||
|
||||
static int gif_image_write_image(uint8_t **bytestream,
|
||||
int x1, int y1, int width, int height,
|
||||
const uint8_t *buf, int linesize, int pix_fmt)
|
||||
{
|
||||
PutBitContext p;
|
||||
uint8_t buffer[200]; /* 100 * 9 / 8 = 113 */
|
||||
int i, left, w, v;
|
||||
const uint8_t *ptr;
|
||||
/* image block */
|
||||
|
||||
bytestream_put_byte(bytestream, 0x2c);
|
||||
bytestream_put_le16(bytestream, x1);
|
||||
bytestream_put_le16(bytestream, y1);
|
||||
bytestream_put_le16(bytestream, width);
|
||||
bytestream_put_le16(bytestream, height);
|
||||
bytestream_put_byte(bytestream, 0x00); /* flags */
|
||||
/* no local clut */
|
||||
|
||||
bytestream_put_byte(bytestream, 0x08);
|
||||
|
||||
left= width * height;
|
||||
|
||||
init_put_bits(&p, buffer, 130);
|
||||
|
||||
/*
|
||||
* the thing here is the bitstream is written as little packets, with a size byte before
|
||||
* but it's still the same bitstream between packets (no flush !)
|
||||
*/
|
||||
ptr = buf;
|
||||
w = width;
|
||||
while(left>0) {
|
||||
|
||||
gif_put_bits_rev(&p, 9, 0x0100); /* clear code */
|
||||
|
||||
for(i=(left<GIF_CHUNKS)?left:GIF_CHUNKS;i;i--) {
|
||||
if (pix_fmt == PIX_FMT_RGB24) {
|
||||
v = gif_clut_index(ptr[0], ptr[1], ptr[2]);
|
||||
ptr+=3;
|
||||
} else {
|
||||
v = *ptr++;
|
||||
}
|
||||
gif_put_bits_rev(&p, 9, v);
|
||||
if (--w == 0) {
|
||||
w = width;
|
||||
buf += linesize;
|
||||
ptr = buf;
|
||||
}
|
||||
}
|
||||
|
||||
if(left<=GIF_CHUNKS) {
|
||||
gif_put_bits_rev(&p, 9, 0x101); /* end of stream */
|
||||
gif_flush_put_bits_rev(&p);
|
||||
}
|
||||
if(pbBufPtr(&p) - p.buf > 0) {
|
||||
bytestream_put_byte(bytestream, pbBufPtr(&p) - p.buf); /* byte count of the packet */
|
||||
bytestream_put_buffer(bytestream, p.buf, pbBufPtr(&p) - p.buf); /* the actual buffer */
|
||||
p.buf_ptr = p.buf; /* dequeue the bytes off the bitstream */
|
||||
}
|
||||
left-=GIF_CHUNKS;
|
||||
}
|
||||
bytestream_put_byte(bytestream, 0x00); /* end of image block */
|
||||
bytestream_put_byte(bytestream, 0x3b);
|
||||
return 0;
|
||||
}
|
||||
|
||||
typedef struct {
|
||||
int64_t time, file_time;
|
||||
uint8_t buffer[100]; /* data chunks */
|
||||
AVFrame picture;
|
||||
} GIFContext;
|
||||
|
||||
static int gif_encode_init(AVCodecContext *avctx)
|
||||
{
|
||||
GIFContext *s = avctx->priv_data;
|
||||
|
||||
avctx->coded_frame = &s->picture;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* better than nothing gif encoder */
|
||||
static int gif_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data)
|
||||
{
|
||||
GIFContext *s = avctx->priv_data;
|
||||
AVFrame *pict = data;
|
||||
AVFrame *const p = (AVFrame *)&s->picture;
|
||||
uint8_t *outbuf_ptr = outbuf;
|
||||
|
||||
*p = *pict;
|
||||
p->pict_type = FF_I_TYPE;
|
||||
p->key_frame = 1;
|
||||
gif_image_write_header(&outbuf_ptr, avctx->width, avctx->height, -1, (uint32_t *)pict->data[1]);
|
||||
gif_image_write_image(&outbuf_ptr, 0, 0, avctx->width, avctx->height, pict->data[0], pict->linesize[0], PIX_FMT_PAL8);
|
||||
return outbuf_ptr - outbuf;
|
||||
}
|
||||
|
||||
AVCodec gif_encoder = {
|
||||
"gif",
|
||||
CODEC_TYPE_VIDEO,
|
||||
CODEC_ID_GIF,
|
||||
sizeof(GIFContext),
|
||||
gif_encode_init,
|
||||
gif_encode_frame,
|
||||
NULL, //encode_end,
|
||||
.pix_fmts= (enum PixelFormat[]){PIX_FMT_PAL8, -1},
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user