/*
* Animated GIF muxer
- * Copyright (c) 2000 Fabrice Bellard.
+ * Copyright (c) 2000 Fabrice Bellard
*
* This file is part of FFmpeg.
*
*/
#include "avformat.h"
-#include "bitstream.h"
+
+/* The GIF format uses reversed order for bitstreams... */
+/* at least they don't use PDP_ENDIAN :) */
+#define BITSTREAM_WRITER_LE
+
+#include "libavcodec/put_bits.h"
/* bitstream minipacket size */
#define GIF_CHUNKS 100
{ 0xff, 0xff, 0x00 }, { 0xff, 0xff, 0x33 }, { 0xff, 0xff, 0x66 }, { 0xff, 0xff, 0x99 }, { 0xff, 0xff, 0xcc }, { 0xff, 0xff, 0xff },
};
-/* The GIF format uses reversed order for bitstreams... */
-/* at least they don't use PDP_ENDIAN :) */
-/* so we 'extend' PutBitContext. hmmm, OOP :) */
-/* seems this thing changed slightly since I wrote it... */
-
-#ifdef ALT_BITSTREAM_WRITER
-# error no ALT_BITSTREAM_WRITER support for now
-#endif
-
-static void gif_put_bits_rev(PutBitContext *s, int n, unsigned int value)
-{
- unsigned int bit_buf;
- int bit_cnt;
-
- // printf("put_bits=%d %x\n", n, value);
- assert(n == 32 || value < (1U << n));
-
- bit_buf = s->bit_buf;
- bit_cnt = 32 - s->bit_left; /* XXX:lazyness... was = s->bit_cnt; */
-
- // printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf);
- /* XXX: optimize */
- if (n < (32-bit_cnt)) {
- bit_buf |= value << (bit_cnt);
- bit_cnt+=n;
- } else {
- bit_buf |= value << (bit_cnt);
-
- *s->buf_ptr = bit_buf & 0xff;
- s->buf_ptr[1] = (bit_buf >> 8) & 0xff;
- s->buf_ptr[2] = (bit_buf >> 16) & 0xff;
- s->buf_ptr[3] = (bit_buf >> 24) & 0xff;
-
- //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 ???
-// flush_buffer_rev(s);
- bit_cnt=bit_cnt + n - 32;
- if (bit_cnt == 0) {
- bit_buf = 0;
- } else {
- bit_buf = value >> (n - bit_cnt);
- }
- }
-
- s->bit_buf = bit_buf;
- s->bit_left = 32 - bit_cnt;
-}
-
-/* pad the end of the output stream with zeros */
-static void gif_flush_put_bits_rev(PutBitContext *s)
-{
- while (s->bit_left < 32) {
- /* XXX: should test end of buffer */
- *s->buf_ptr++=s->bit_buf & 0xff;
- s->bit_buf>>=8;
- s->bit_left+=8;
- }
-// flush_buffer_rev(s);
- s->bit_left=32;
- s->bit_buf=0;
-}
-
-/* !RevPutBitContext */
-
/* GIF header */
static int gif_image_write_header(ByteIOContext *pb,
int width, int height, int loop_count,
/* 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);
}
w = width;
while(left>0) {
- gif_put_bits_rev(&p, 9, 0x0100); /* clear code */
+ put_bits(&p, 9, 0x0100); /* clear code */
for(i=(left<GIF_CHUNKS)?left:GIF_CHUNKS;i;i--) {
if (pix_fmt == PIX_FMT_RGB24) {
} else {
v = *ptr++;
}
- gif_put_bits_rev(&p, 9, v);
+ put_bits(&p, 9, v);
if (--w == 0) {
w = width;
buf += linesize;
}
if(left<=GIF_CHUNKS) {
- gif_put_bits_rev(&p, 9, 0x101); /* end of stream */
- gif_flush_put_bits_rev(&p);
+ put_bits(&p, 9, 0x101); /* end of stream */
+ flush_put_bits(&p);
}
- if(pbBufPtr(&p) - p.buf > 0) {
- put_byte(pb, pbBufPtr(&p) - p.buf); /* byte count of the packet */
- put_buffer(pb, p.buf, pbBufPtr(&p) - p.buf); /* the actual buffer */
+ if(put_bits_ptr(&p) - p.buf > 0) {
+ put_byte(pb, put_bits_ptr(&p) - p.buf); /* byte count of the packet */
+ put_buffer(pb, p.buf, put_bits_ptr(&p) - p.buf); /* the actual buffer */
p.buf_ptr = p.buf; /* dequeue the bytes off the bitstream */
}
left-=GIF_CHUNKS;
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*/;
video_enc = NULL;
for(i=0;i<s->nb_streams;i++) {
enc = s->streams[i]->codec;
- if (enc->codec_type != CODEC_TYPE_AUDIO)
+ if (enc->codec_type != AVMEDIA_TYPE_AUDIO)
video_enc = enc;
}
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_IO;
+ 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_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
- if (codec->codec_type == CODEC_TYPE_AUDIO)
+ if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
return 0; /* just ignore audio */
else
return gif_write_video(s, codec, pkt->data, pkt->size);
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;
}
-AVOutputFormat gif_muxer = {
+AVOutputFormat ff_gif_muxer = {
"gif",
- "GIF Animation",
+ NULL_IF_CONFIG_SMALL("GIF Animation"),
"image/gif",
"gif",
sizeof(GIFContext),
projects / ffmpeg / blobdiff