/*
- * Animated GIF encoder
+ * Animated GIF muxer
* Copyright (c) 2000 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
+ * 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 "bitstream.h"
+#include "libavcodec/bitstream.h"
/* bitstream minipacket size */
#define GIF_CHUNKS 100
unsigned int bit_buf;
int bit_cnt;
-#ifdef STATS
- st_out_bit_counts[st_current_index] += n;
-#endif
// printf("put_bits=%d %x\n", n, value);
assert(n == 32 || value < (1U << n));
//printf("bitbuf = %08x\n", bit_buf);
s->buf_ptr+=4;
if (s->buf_ptr >= s->buf_end)
- puts("bit buffer overflow !!"); // should never happen ! who got rid of the callback ???
+ abort();
// flush_buffer_rev(s);
bit_cnt=bit_cnt + n - 32;
if (bit_cnt == 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));
+ return (((r) / 47) % 6) * 6 * 6 + (((g) / 47) % 6) * 6 + (((b) / 47) % 6);
}
static int gif_write_header(AVFormatContext *s)
{
GIFContext *gif = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
AVCodecContext *enc, *video_enc;
int i, width, height, loop_count /*, rate*/;
// rate = video_enc->time_base.den;
}
- /* XXX: is it allowed ? seems to work so far... */
- video_enc->pix_fmt = PIX_FMT_RGB24;
+ if (video_enc->pix_fmt != PIX_FMT_RGB24) {
+ av_log(s, AV_LOG_ERROR, "ERROR: gif only handles the rgb24 pixel format. Use -pix_fmt rgb24.\n");
+ return AVERROR(EIO);
+ }
gif_image_write_header(pb, width, height, loop_count, NULL);
- put_flush_packet(&s->pb);
+ put_flush_packet(s->pb);
return 0;
}
static int gif_write_video(AVFormatContext *s,
AVCodecContext *enc, const uint8_t *buf, int size)
{
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
GIFContext *gif = s->priv_data;
int jiffies;
int64_t delay;
gif_image_write_image(pb, 0, 0, enc->width, enc->height,
buf, enc->width * 3, PIX_FMT_RGB24);
- put_flush_packet(&s->pb);
+ put_flush_packet(s->pb);
return 0;
}
static int gif_write_trailer(AVFormatContext *s)
{
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
put_byte(pb, 0x3b);
- put_flush_packet(&s->pb);
+ put_flush_packet(s->pb);
return 0;
}
-/* better than nothing gif image writer */
-int gif_write(ByteIOContext *pb, AVImageInfo *info)
-{
- gif_image_write_header(pb, info->width, info->height, AVFMT_NOOUTPUTLOOP,
- (uint32_t *)info->pict.data[1]);
- gif_image_write_image(pb, 0, 0, info->width, info->height,
- info->pict.data[0], info->pict.linesize[0],
- PIX_FMT_PAL8);
- put_byte(pb, 0x3b);
- put_flush_packet(pb);
- return 0;
-}
-
-static AVOutputFormat gif_oformat = {
+AVOutputFormat gif_muxer = {
"gif",
- "GIF Animation",
+ NULL_IF_CONFIG_SMALL("GIF Animation"),
"image/gif",
"gif",
sizeof(GIFContext),
gif_write_packet,
gif_write_trailer,
};
-
-extern AVInputFormat gif_iformat;
-
-int gif_init(void)
-{
- av_register_output_format(&gif_oformat);
- av_register_input_format(&gif_iformat);
- return 0;
-}