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-rw-r--r--ffmpeg/libavformat/gif.c222
1 files changed, 0 insertions, 222 deletions
diff --git a/ffmpeg/libavformat/gif.c b/ffmpeg/libavformat/gif.c
deleted file mode 100644
index e52498d..0000000
--- a/ffmpeg/libavformat/gif.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
- * Animated GIF muxer
- * Copyright (c) 2000 Fabrice Bellard
- *
- * first version by Francois Revol <revol@free.fr>
- *
- * 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
- */
-
-#include "avformat.h"
-#include "internal.h"
-#include "libavutil/avassert.h"
-#include "libavutil/imgutils.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-
-static int gif_image_write_header(AVIOContext *pb, int width, int height,
- int loop_count, uint32_t *palette)
-{
- int i;
-
- avio_write(pb, "GIF", 3);
- avio_write(pb, "89a", 3);
- avio_wl16(pb, width);
- avio_wl16(pb, height);
-
- if (palette) {
- avio_w8(pb, 0xf7); /* flags: global clut, 256 entries */
- avio_w8(pb, 0x1f); /* background color index */
- avio_w8(pb, 0); /* aspect ratio */
- for (i = 0; i < 256; i++) {
- const uint32_t v = palette[i] & 0xffffff;
- avio_wb24(pb, v);
- }
- } else {
- avio_w8(pb, 0); /* flags */
- avio_w8(pb, 0); /* background color index */
- avio_w8(pb, 0); /* aspect ratio */
- }
-
-
- if (loop_count >= 0 ) {
- /* "NETSCAPE EXTENSION" for looped animation GIF */
- avio_w8(pb, 0x21); /* GIF Extension code */
- avio_w8(pb, 0xff); /* Application Extension Label */
- avio_w8(pb, 0x0b); /* Length of Application Block */
- avio_write(pb, "NETSCAPE2.0", sizeof("NETSCAPE2.0") - 1);
- avio_w8(pb, 0x03); /* Length of Data Sub-Block */
- avio_w8(pb, 0x01);
- avio_wl16(pb, (uint16_t)loop_count);
- avio_w8(pb, 0x00); /* Data Sub-block Terminator */
- }
-
- return 0;
-}
-
-typedef struct {
- AVClass *class;
- int loop;
- int last_delay;
- AVPacket *prev_pkt;
- int duration;
-} GIFContext;
-
-static int gif_write_header(AVFormatContext *s)
-{
- GIFContext *gif = s->priv_data;
- AVIOContext *pb = s->pb;
- AVCodecContext *video_enc;
- int width, height;
- uint32_t palette[AVPALETTE_COUNT];
-
- if (s->nb_streams != 1 ||
- s->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
- s->streams[0]->codec->codec_id != AV_CODEC_ID_GIF) {
- av_log(s, AV_LOG_ERROR,
- "GIF muxer supports only a single video GIF stream.\n");
- return AVERROR(EINVAL);
- }
-
- video_enc = s->streams[0]->codec;
- width = video_enc->width;
- height = video_enc->height;
-
- avpriv_set_pts_info(s->streams[0], 64, 1, 100);
- if (avpriv_set_systematic_pal2(palette, video_enc->pix_fmt) < 0) {
- av_assert0(video_enc->pix_fmt == AV_PIX_FMT_PAL8);
- gif_image_write_header(pb, width, height, gif->loop, NULL);
- } else {
- gif_image_write_header(pb, width, height, gif->loop, palette);
- }
-
- avio_flush(s->pb);
- return 0;
-}
-
-static int flush_packet(AVFormatContext *s, AVPacket *new)
-{
- GIFContext *gif = s->priv_data;
- int size;
- AVIOContext *pb = s->pb;
- uint8_t flags = 0x4, transparent_color_index = 0x1f;
- const uint32_t *palette;
- AVPacket *pkt = gif->prev_pkt;
-
- if (!pkt)
- return 0;
-
- /* Mark one colour as transparent if the input palette contains at least
- * one colour that is more than 50% transparent. */
- palette = (uint32_t*)av_packet_get_side_data(pkt, AV_PKT_DATA_PALETTE, &size);
- if (palette && size != AVPALETTE_SIZE) {
- av_log(s, AV_LOG_ERROR, "Invalid palette extradata\n");
- return AVERROR_INVALIDDATA;
- }
- if (palette) {
- unsigned i, smallest_alpha = 0xff;
-
- for (i = 0; i < AVPALETTE_COUNT; i++) {
- const uint32_t v = palette[i];
- if (v >> 24 < smallest_alpha) {
- smallest_alpha = v >> 24;
- transparent_color_index = i;
- }
- }
- if (smallest_alpha < 128)
- flags |= 0x1; /* Transparent Color Flag */
- }
-
- if (new && new->pts != AV_NOPTS_VALUE)
- gif->duration = av_clip_uint16(new->pts - gif->prev_pkt->pts);
- else if (!new && gif->last_delay >= 0)
- gif->duration = gif->last_delay;
-
- /* graphic control extension block */
- avio_w8(pb, 0x21);
- avio_w8(pb, 0xf9);
- avio_w8(pb, 0x04); /* block size */
- avio_w8(pb, flags);
- avio_wl16(pb, gif->duration);
- avio_w8(pb, transparent_color_index);
- avio_w8(pb, 0x00);
-
- avio_write(pb, pkt->data, pkt->size);
-
- av_free_packet(gif->prev_pkt);
- if (new)
- av_copy_packet(gif->prev_pkt, new);
-
- return 0;
-}
-
-static int gif_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- GIFContext *gif = s->priv_data;
-
- if (!gif->prev_pkt) {
- gif->prev_pkt = av_malloc(sizeof(*gif->prev_pkt));
- if (!gif->prev_pkt)
- return AVERROR(ENOMEM);
- return av_copy_packet(gif->prev_pkt, pkt);
- }
- return flush_packet(s, pkt);
-}
-
-static int gif_write_trailer(AVFormatContext *s)
-{
- GIFContext *gif = s->priv_data;
- AVIOContext *pb = s->pb;
-
- flush_packet(s, NULL);
- av_freep(&gif->prev_pkt);
- avio_w8(pb, 0x3b);
-
- return 0;
-}
-
-#define OFFSET(x) offsetof(GIFContext, x)
-#define ENC AV_OPT_FLAG_ENCODING_PARAM
-static const AVOption options[] = {
- { "loop", "Number of times to loop the output: -1 - no loop, 0 - infinite loop", OFFSET(loop),
- AV_OPT_TYPE_INT, { .i64 = 0 }, -1, 65535, ENC },
- { "final_delay", "Force delay (in centiseconds) after the last frame", OFFSET(last_delay),
- AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 65535, ENC },
- { NULL },
-};
-
-static const AVClass gif_muxer_class = {
- .class_name = "GIF muxer",
- .item_name = av_default_item_name,
- .version = LIBAVUTIL_VERSION_INT,
- .option = options,
-};
-
-AVOutputFormat ff_gif_muxer = {
- .name = "gif",
- .long_name = NULL_IF_CONFIG_SMALL("GIF Animation"),
- .mime_type = "image/gif",
- .extensions = "gif",
- .priv_data_size = sizeof(GIFContext),
- .audio_codec = AV_CODEC_ID_NONE,
- .video_codec = AV_CODEC_ID_GIF,
- .write_header = gif_write_header,
- .write_packet = gif_write_packet,
- .write_trailer = gif_write_trailer,
- .priv_class = &gif_muxer_class,
- .flags = AVFMT_VARIABLE_FPS,
-};
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