Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

* support for .au .gif .mov .mp4 by François Revol <revol@free.fr>

Browse Source 
hmm any opinions about GIF support ?

Originally committed as revision 385 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Zdenek Kabelac 23 years ago
parent 0129e7b3e6
commit 6cea494e32
6 changed files with 1570 additions and 1 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 2
      libav/Makefile
  2. 192
      libav/au.c
  3. 9
      libav/avformat.h
  4. 404
      libav/gif.c
  5. 960
      libav/mov.c
  6. 4
      libav/utils.c

2
libav/Makefile
Unescape View File

@ -4,7 +4,7 @@ CFLAGS= $(OPTFLAGS) -Wall -g -I../libavcodec -DHAVE_AV_CONFIG_H
OBJS= rm.o mpeg.o asf.o avienc.o jpeg.o swf.o wav.o raw.o \
avidec.o ffm.o \
avio.o aviobuf.o utils.o \
file.o img.o
file.o img.o au.o gif.o mov.o
ifeq ($(CONFIG_GRAB),yes)
OBJS+= grab.o audio.o

192
libav/au.c
Unescape View File

@ -0,0 +1,192 @@
/*
* AU encoder and decoder
* Copyright (c) 2001 Gerard Lantau.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* First version by Francois Revol revol@free.fr
*
* Reference documents:
* http://www.opengroup.org/public/pubs/external/auformat.html
* http://www.goice.co.jp/member/mo/formats/au.html
*/
#include "avformat.h"
#include "avi.h"
/* if we don't know the size in advance */
#define AU_UNKOWN_SIZE ((UINT32)(~0))
/* The ffmpeg codecs we support, and the IDs they have in the file */
CodecTag codec_au_tags[] = {
{ CODEC_ID_PCM_MULAW, 1 },
{ CODEC_ID_PCM_S16BE, 3 },
{ CODEC_ID_PCM_ALAW, 27 },
{ 0, 0 },
};
/* AUDIO_FILE header */
int put_au_header(ByteIOContext *pb, AVCodecContext *enc)
{
int tag;
tag = codec_get_tag(codec_au_tags, enc->codec_id);
if (tag == 0)
return -1;
put_tag(pb, ".snd"); /* magic number */
put_be32(pb, 24); /* header size */
put_be32(pb, AU_UNKOWN_SIZE); /* data size */
put_be32(pb, (UINT32)tag); /* codec ID */
put_be32(pb, enc->sample_rate);
put_be32(pb, (UINT32)enc->channels);
return 0;
}
static int au_write_header(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
s->priv_data = NULL;
/* format header */
if (put_au_header(pb, &s->streams[0]->codec) < 0) {
return -1;
}
put_flush_packet(pb);
return 0;
}
static int au_write_packet(AVFormatContext *s, int stream_index_ptr,
UINT8 *buf, int size)
{
ByteIOContext *pb = &s->pb;
put_buffer(pb, buf, size);
return 0;
}
static int au_write_trailer(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
offset_t file_size;
if (!url_is_streamed(&s->pb)) {
/* update file size */
file_size = url_ftell(pb);
url_fseek(pb, 8, SEEK_SET);
put_be32(pb, (UINT32)(file_size - 24));
url_fseek(pb, file_size, SEEK_SET);
put_flush_packet(pb);
}
return 0;
}
/* au input */
static int au_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int size;
unsigned int tag;
ByteIOContext *pb = &s->pb;
unsigned int id, codec, channels, rate;
AVStream *st;
/* check ".snd" header */
tag = get_le32(pb);
if (tag != MKTAG('.', 's', 'n', 'd'))
return -1;
size = get_be32(pb); /* header size */
get_be32(pb); /* data size */
id = get_be32(pb);
rate = get_be32(pb);
channels = get_be32(pb);
codec = codec_get_id(codec_au_tags, id);
if (size >= 24) {
/* skip unused data */
url_fseek(pb, size - 24, SEEK_CUR);
}
/* now we are ready: build format streams */
st = malloc(sizeof(AVStream));
if (!st)
return -1;
s->nb_streams = 1;
s->streams[0] = st;
st->id = 0;
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_tag = id;
st->codec.codec_id = codec;
st->codec.channels = channels;
st->codec.sample_rate = rate;
return 0;
}
#define MAX_SIZE 4096
static int au_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
int packet_size, n, ret;
if (url_feof(&s->pb))
return -EIO;
packet_size = url_get_packet_size(&s->pb);
n = MAX_SIZE / packet_size;
if (n <= 0)
return n = 1;
if (av_new_packet(pkt, n * packet_size))
return -EIO;
pkt->stream_index = 0;
ret = get_buffer(&s->pb, pkt->data, pkt->size);
if (ret < 0)
av_free_packet(pkt);
/* note: we need to modify the packet size here to handle the last
packet */
pkt->size = ret;
return ret;
}
static int au_read_close(AVFormatContext *s)
{
return 0;
}
AVFormat au_format = {
"au",
"SUN AU Format",
"audio/basic",
"au",
CODEC_ID_PCM_S16BE,
CODEC_ID_NONE,
au_write_header,
au_write_packet,
au_write_trailer,
au_read_header,
au_read_packet,
au_read_close,
};

9
libav/avformat.h
Unescape View File

@ -113,6 +113,10 @@ extern AVFormat asf_format;
/* avienc.c */
extern AVFormat avi_format;
/* mov.c */
extern AVFormat mov_format;
extern AVFormat mp4_format;
/* jpegenc.c */
extern AVFormat mpjpeg_format;
extern AVFormat jpeg_format;
@ -121,6 +125,11 @@ extern AVFormat single_jpeg_format;
/* swfenc.c */
extern AVFormat swf_format;
/* gif.c */
extern AVFormat gif_format;
/* au.c */
extern AVFormat au_format;
/* wav.c */
extern AVFormat wav_format;

404
libav/gif.c
Unescape View File

@ -0,0 +1,404 @@
/*
* Animated GIF encoder
* Copyright (c) 2000 Gerard Lantau.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* First version by Francois Revol revol@free.fr
*
* Features and limitations:
* - currently no compression is performed,
* in fact the size of the data is 9/8 the size of the image in 8bpp
* - uses only a global standard palette
* - tested with IE 5.0, Opera for BeOS, NetPositive (BeOS), and Mozilla (BeOS).
*
* Reference documents:
* http://www.goice.co.jp/member/mo/formats/gif.html
* http://astronomy.swin.edu.au/pbourke/dataformats/gif/
* http://www.dcs.ed.ac.uk/home/mxr/gfx/2d/GIF89a.txt
*
* this url claims to have an LZW algorithm not covered by Unisys patent:
* http://www.msg.net/utility/whirlgif/gifencod.html
* could help reduce the size of the files _a lot_...
* some sites mentions an RLE type compression also.
*/
#include "avformat.h"
/* bitstream minipacket size */
#define GIF_CHUNKS 100
/* slows down the decoding (and some browsers doesn't like it) */
/* #define GIF_ADD_APP_HEADER */
typedef struct {
unsigned char r;
unsigned char g;
unsigned char b;
} rgb_triplet;
/* we use the standard 216 color palette */
/* this script was used to create the palette:
* 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
* echo -n "{ 0x$r, 0x$g, 0x$b }, "; done; echo ""; done; done
*/
const rgb_triplet gif_clut[216] = {
{ 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x33 }, { 0x00, 0x00, 0x66 }, { 0x00, 0x00, 0x99 }, { 0x00, 0x00, 0xcc }, { 0x00, 0x00, 0xff },
{ 0x00, 0x33, 0x00 }, { 0x00, 0x33, 0x33 }, { 0x00, 0x33, 0x66 }, { 0x00, 0x33, 0x99 }, { 0x00, 0x33, 0xcc }, { 0x00, 0x33, 0xff },
{ 0x00, 0x66, 0x00 }, { 0x00, 0x66, 0x33 }, { 0x00, 0x66, 0x66 }, { 0x00, 0x66, 0x99 }, { 0x00, 0x66, 0xcc }, { 0x00, 0x66, 0xff },
{ 0x00, 0x99, 0x00 }, { 0x00, 0x99, 0x33 }, { 0x00, 0x99, 0x66 }, { 0x00, 0x99, 0x99 }, { 0x00, 0x99, 0xcc }, { 0x00, 0x99, 0xff },
{ 0x00, 0xcc, 0x00 }, { 0x00, 0xcc, 0x33 }, { 0x00, 0xcc, 0x66 }, { 0x00, 0xcc, 0x99 }, { 0x00, 0xcc, 0xcc }, { 0x00, 0xcc, 0xff },
{ 0x00, 0xff, 0x00 }, { 0x00, 0xff, 0x33 }, { 0x00, 0xff, 0x66 }, { 0x00, 0xff, 0x99 }, { 0x00, 0xff, 0xcc }, { 0x00, 0xff, 0xff },
{ 0x33, 0x00, 0x00 }, { 0x33, 0x00, 0x33 }, { 0x33, 0x00, 0x66 }, { 0x33, 0x00, 0x99 }, { 0x33, 0x00, 0xcc }, { 0x33, 0x00, 0xff },
{ 0x33, 0x33, 0x00 }, { 0x33, 0x33, 0x33 }, { 0x33, 0x33, 0x66 }, { 0x33, 0x33, 0x99 }, { 0x33, 0x33, 0xcc }, { 0x33, 0x33, 0xff },
{ 0x33, 0x66, 0x00 }, { 0x33, 0x66, 0x33 }, { 0x33, 0x66, 0x66 }, { 0x33, 0x66, 0x99 }, { 0x33, 0x66, 0xcc }, { 0x33, 0x66, 0xff },
{ 0x33, 0x99, 0x00 }, { 0x33, 0x99, 0x33 }, { 0x33, 0x99, 0x66 }, { 0x33, 0x99, 0x99 }, { 0x33, 0x99, 0xcc }, { 0x33, 0x99, 0xff },
{ 0x33, 0xcc, 0x00 }, { 0x33, 0xcc, 0x33 }, { 0x33, 0xcc, 0x66 }, { 0x33, 0xcc, 0x99 }, { 0x33, 0xcc, 0xcc }, { 0x33, 0xcc, 0xff },
{ 0x33, 0xff, 0x00 }, { 0x33, 0xff, 0x33 }, { 0x33, 0xff, 0x66 }, { 0x33, 0xff, 0x99 }, { 0x33, 0xff, 0xcc }, { 0x33, 0xff, 0xff },
{ 0x66, 0x00, 0x00 }, { 0x66, 0x00, 0x33 }, { 0x66, 0x00, 0x66 }, { 0x66, 0x00, 0x99 }, { 0x66, 0x00, 0xcc }, { 0x66, 0x00, 0xff },
{ 0x66, 0x33, 0x00 }, { 0x66, 0x33, 0x33 }, { 0x66, 0x33, 0x66 }, { 0x66, 0x33, 0x99 }, { 0x66, 0x33, 0xcc }, { 0x66, 0x33, 0xff },
{ 0x66, 0x66, 0x00 }, { 0x66, 0x66, 0x33 }, { 0x66, 0x66, 0x66 }, { 0x66, 0x66, 0x99 }, { 0x66, 0x66, 0xcc }, { 0x66, 0x66, 0xff },
{ 0x66, 0x99, 0x00 }, { 0x66, 0x99, 0x33 }, { 0x66, 0x99, 0x66 }, { 0x66, 0x99, 0x99 }, { 0x66, 0x99, 0xcc }, { 0x66, 0x99, 0xff },
{ 0x66, 0xcc, 0x00 }, { 0x66, 0xcc, 0x33 }, { 0x66, 0xcc, 0x66 }, { 0x66, 0xcc, 0x99 }, { 0x66, 0xcc, 0xcc }, { 0x66, 0xcc, 0xff },
{ 0x66, 0xff, 0x00 }, { 0x66, 0xff, 0x33 }, { 0x66, 0xff, 0x66 }, { 0x66, 0xff, 0x99 }, { 0x66, 0xff, 0xcc }, { 0x66, 0xff, 0xff },
{ 0x99, 0x00, 0x00 }, { 0x99, 0x00, 0x33 }, { 0x99, 0x00, 0x66 }, { 0x99, 0x00, 0x99 }, { 0x99, 0x00, 0xcc }, { 0x99, 0x00, 0xff },
{ 0x99, 0x33, 0x00 }, { 0x99, 0x33, 0x33 }, { 0x99, 0x33, 0x66 }, { 0x99, 0x33, 0x99 }, { 0x99, 0x33, 0xcc }, { 0x99, 0x33, 0xff },
{ 0x99, 0x66, 0x00 }, { 0x99, 0x66, 0x33 }, { 0x99, 0x66, 0x66 }, { 0x99, 0x66, 0x99 }, { 0x99, 0x66, 0xcc }, { 0x99, 0x66, 0xff },
{ 0x99, 0x99, 0x00 }, { 0x99, 0x99, 0x33 }, { 0x99, 0x99, 0x66 }, { 0x99, 0x99, 0x99 }, { 0x99, 0x99, 0xcc }, { 0x99, 0x99, 0xff },
{ 0x99, 0xcc, 0x00 }, { 0x99, 0xcc, 0x33 }, { 0x99, 0xcc, 0x66 }, { 0x99, 0xcc, 0x99 }, { 0x99, 0xcc, 0xcc }, { 0x99, 0xcc, 0xff },
{ 0x99, 0xff, 0x00 }, { 0x99, 0xff, 0x33 }, { 0x99, 0xff, 0x66 }, { 0x99, 0xff, 0x99 }, { 0x99, 0xff, 0xcc }, { 0x99, 0xff, 0xff },
{ 0xcc, 0x00, 0x00 }, { 0xcc, 0x00, 0x33 }, { 0xcc, 0x00, 0x66 }, { 0xcc, 0x00, 0x99 }, { 0xcc, 0x00, 0xcc }, { 0xcc, 0x00, 0xff },
{ 0xcc, 0x33, 0x00 }, { 0xcc, 0x33, 0x33 }, { 0xcc, 0x33, 0x66 }, { 0xcc, 0x33, 0x99 }, { 0xcc, 0x33, 0xcc }, { 0xcc, 0x33, 0xff },
{ 0xcc, 0x66, 0x00 }, { 0xcc, 0x66, 0x33 }, { 0xcc, 0x66, 0x66 }, { 0xcc, 0x66, 0x99 }, { 0xcc, 0x66, 0xcc }, { 0xcc, 0x66, 0xff },
{ 0xcc, 0x99, 0x00 }, { 0xcc, 0x99, 0x33 }, { 0xcc, 0x99, 0x66 }, { 0xcc, 0x99, 0x99 }, { 0xcc, 0x99, 0xcc }, { 0xcc, 0x99, 0xff },
{ 0xcc, 0xcc, 0x00 }, { 0xcc, 0xcc, 0x33 }, { 0xcc, 0xcc, 0x66 }, { 0xcc, 0xcc, 0x99 }, { 0xcc, 0xcc, 0xcc }, { 0xcc, 0xcc, 0xff },
{ 0xcc, 0xff, 0x00 }, { 0xcc, 0xff, 0x33 }, { 0xcc, 0xff, 0x66 }, { 0xcc, 0xff, 0x99 }, { 0xcc, 0xff, 0xcc }, { 0xcc, 0xff, 0xff },
{ 0xff, 0x00, 0x00 }, { 0xff, 0x00, 0x33 }, { 0xff, 0x00, 0x66 }, { 0xff, 0x00, 0x99 }, { 0xff, 0x00, 0xcc }, { 0xff, 0x00, 0xff },
{ 0xff, 0x33, 0x00 }, { 0xff, 0x33, 0x33 }, { 0xff, 0x33, 0x66 }, { 0xff, 0x33, 0x99 }, { 0xff, 0x33, 0xcc }, { 0xff, 0x33, 0xff },
{ 0xff, 0x66, 0x00 }, { 0xff, 0x66, 0x33 }, { 0xff, 0x66, 0x66 }, { 0xff, 0x66, 0x99 }, { 0xff, 0x66, 0xcc }, { 0xff, 0x66, 0xff },
{ 0xff, 0x99, 0x00 }, { 0xff, 0x99, 0x33 }, { 0xff, 0x99, 0x66 }, { 0xff, 0x99, 0x99 }, { 0xff, 0x99, 0xcc }, { 0xff, 0x99, 0xff },
{ 0xff, 0xcc, 0x00 }, { 0xff, 0xcc, 0x33 }, { 0xff, 0xcc, 0x66 }, { 0xff, 0xcc, 0x99 }, { 0xff, 0xcc, 0xcc }, { 0xff, 0xcc, 0xff },
{ 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
void init_put_bits_rev(PutBitContext *s,
UINT8 *buffer, int buffer_size,
void *opaque,
void (*write_data)(void *, UINT8 *, int))
{
init_put_bits(s, buffer, buffer_size, opaque, write_data);
}
void put_bits_rev(PutBitContext *s, int n, unsigned int value)
{
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));
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;
}
/* return the number of bits output */
INT64 get_bit_count_rev(PutBitContext *s)
{
return get_bit_count(s);
}
void align_put_bits_rev(PutBitContext *s)
{
align_put_bits(s);
}
/* pad the end of the output stream with zeros */
void 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 */
typedef struct {
UINT8 buffer[100]; /* data chunks */
INT64 time, file_time;
} GIFContext;
static int gif_write_header(AVFormatContext *s)
{
GIFContext *gif;
ByteIOContext *pb = &s->pb;
AVCodecContext *enc, *video_enc;
int i, width, height, rate;
/* XXX: do we reject audio streams or just ignore them ?
if(s->nb_streams > 1)
return -1;
*/
gif = malloc(sizeof(GIFContext));
if (!gif)
return -1;
s->priv_data = gif;
gif->time = 0;
gif->file_time = 0;
video_enc = NULL;
for(i=0;i<s->nb_streams;i++) {
enc = &s->streams[i]->codec;
if (enc->codec_type != CODEC_TYPE_AUDIO)
video_enc = enc;
}
if (!video_enc) {
free(gif);
return -1;
} else {
width = video_enc->width;
height = video_enc->height;
rate = video_enc->frame_rate;
}
/* XXX: is it allowed ? seems to work so far... */
video_enc->pix_fmt = PIX_FMT_RGB24;
/* GIF header */
put_tag(pb, "GIF");
put_tag(pb, "89a");
put_le16(pb, width);
put_le16(pb, height);
put_byte(pb, 0xf7); /* flags: global clut, 256 entries */
put_byte(pb, 0x1f); /* background color index */
put_byte(pb, 0); /* aspect ratio */
/* the global palette */
put_buffer(pb, (unsigned char *)gif_clut, 216*3);
for(i=0;i<((256-216)*3);i++)
put_byte(pb, 0);
/* application extension header */
/* XXX: not really sure what to put in here... */
#ifdef GIF_ADD_APP_HEADER
put_byte(pb, 0x21);
put_byte(pb, 0xff);
put_byte(pb, 0x0b);
put_tag(pb, "NETSCAPE2.0");
put_byte(pb, 0x03);
put_byte(pb, 0x01);
put_byte(pb, 0x00);
put_byte(pb, 0x00);
#endif
put_flush_packet(&s->pb);
return 0;
}
/* this is maybe slow, but allows for extensions */
static inline unsigned char gif_clut_index(rgb_triplet *clut, UINT8 r, UINT8 g, UINT8 b)
{
return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));
}
/* chunk writer callback */
/* !!! XXX:deprecated
static void gif_put_chunk(void *pbctx, UINT8 *buffer, int count)
{
ByteIOContext *pb = (ByteIOContext *)pbctx;
put_byte(pb, (UINT8)count);
put_buffer(pb, buffer, count);
}
*/
static int gif_write_video(AVFormatContext *s,
AVCodecContext *enc, UINT8 *buf, int size)
{
ByteIOContext *pb = &s->pb;
GIFContext *gif = s->priv_data;
int i, left, jiffies;
INT64 delay;
PutBitContext p;
UINT8 buffer[200]; /* 100 * 9 / 8 = 113 */
/* graphic control extension block */
put_byte(pb, 0x21);
put_byte(pb, 0xf9);
put_byte(pb, 0x04); /* block size */
put_byte(pb, 0x04); /* flags */
/* 1 jiffy is 1/70 s */
/* the delay_time field indicates the number of jiffies - 1 */
delay = gif->file_time - gif->time;
/* XXX: should use delay, in order to be more accurate */
/* instead of using the same rounded value each time */
/* XXX: don't even remember if I really use it for now */
jiffies = (70*FRAME_RATE_BASE/enc->frame_rate) - 1;
put_le16(pb, jiffies);
put_byte(pb, 0x1f); /* transparent color index */
put_byte(pb, 0x00);
/* image block */
put_byte(pb, 0x2c);
put_le16(pb, 0);
put_le16(pb, 0);
put_le16(pb, enc->width);
put_le16(pb, enc->height);
put_byte(pb, 0x00); /* flags */
/* no local clut */
put_byte(pb, 0x08);
left=size/3;
/* XXX:deprecated */
/*init_put_bits_rev(&p, buffer, sizeof(buf), (void *)pb, gif_put_chunk); *//* mmm found a but in my code: s/sizeof(buf)/150/ */
init_put_bits_rev(&p, buffer, 130, NULL, NULL);
/*
* 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 !)
*/
while(left>0) {
put_bits_rev(&p, 9, 0x0100); /* clear code */
for(i=0;i<GIF_CHUNKS;i++) {
put_bits_rev(&p, 9, gif_clut_index(NULL, *buf, buf[1], buf[2]));
buf+=3;
}
if(left<=GIF_CHUNKS) {
put_bits_rev(&p, 9, 0x101); /* end of stream */
flush_put_bits_rev(&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 */
p.data_out_size += pbBufPtr(&p) - p.buf;
p.buf_ptr = p.buf; /* dequeue the bytes off the bitstream */
}
if(left<=GIF_CHUNKS) {
put_byte(pb, 0x00); /* end of image block */
}
left-=GIF_CHUNKS;
}
put_flush_packet(&s->pb);
return 0;
}
static int gif_write_packet(AVFormatContext *s, int stream_index,
UINT8 *buf, int size)
{
AVCodecContext *codec = &s->streams[stream_index]->codec;
if (codec->codec_type == CODEC_TYPE_AUDIO)
return 0; /* just ignore audio */
else
return gif_write_video(s, codec, buf, size);
}
static int gif_write_trailer(AVFormatContext *s)
{
GIFContext *gif = s->priv_data;
ByteIOContext *pb = &s->pb;
put_byte(pb, 0x3b);
put_flush_packet(&s->pb);
free(gif);
return 0;
}
AVFormat gif_format = {
"gif",
"GIF Animation",
"image/gif",
"gif",
CODEC_ID_NONE,
CODEC_ID_RAWVIDEO,
gif_write_header,
gif_write_packet,
gif_write_trailer,
NULL, /* read_header */
NULL, /* read_packet */
NULL, /* read_close */
};

960
libav/mov.c
Unescape View File

@ -0,0 +1,960 @@
/*
* MOV decoder.
* Copyright (c) 2001 Gerard Lantau.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "avformat.h"
#include "avi.h"
/*
* First version by Francois Revol revol@free.fr
*
* Features and limitations:
* - reads most of the QT files I have (at least the structure),
* the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.
* - ffmpeg has nearly none of the usual QuickTime codecs,
* although I succesfully dumped raw and mp3 audio tracks off .mov files.
* Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
* - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes
* (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at
* http://mpeg.telecomitalialab.com/faq.htm
* - the code is quite ugly... maybe I won't do it recursive next time :-)
*
* Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
* when coding this :) (it's a writer anyway)
*
* Reference documents:
* http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
* Apple:
* http://developer.apple.com/techpubs/quicktime/qtdevdocs/QTFF/qtff.html
* http://developer.apple.com/techpubs/quicktime/qtdevdocs/PDF/QTFileFormat.pdf
* QuickTime is a trademark of Apple (AFAIK :))
*/
#define DEBUG
#ifdef DEBUG
/*
* XXX: static sux, even more in a multithreaded environment...
* Avoid them. This is here just to help debugging.
*/
static int debug_indent = 0;
void print_atom(const char *str, UINT32 type, UINT64 offset, UINT64 size)
{
unsigned int tag, i;
tag = (unsigned int) type;
i=debug_indent;
if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
while(i--)
printf("|");
printf("parse:");
printf(" %s: tag=%c%c%c%c offset=%d size=0x%x\n",
str, tag & 0xff,
(tag >> 8) & 0xff,
(tag >> 16) & 0xff,
(tag >> 24) & 0xff,
(unsigned int)offset,
(unsigned int)size);
}
#endif
/* some streams in QT (and in MP4 mostly) aren't either video nor audio */
/* so we first list them as this, then clean up the list of streams we give back, */
/* getting rid of these */
#define CODEC_TYPE_MOV_OTHER 2
CodecTag mov_video_tags[] = {
/* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */
/* { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG */
{ CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
{ CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
/* Graphics */
/* Animation */
/* Apple video */
/* Kodak Photo CD */
/* { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG ? */
{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format A) */
{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
/* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */
/* Sorenson video */
{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, /* OpenDiVX *//* yeah ! */
{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
/* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
{ 0, 0 },
};
CodecTag mov_audio_tags[] = {
/* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */
{ CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
{ CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') }, /* 8 bits */
{ CODEC_ID_PCM_U8, 0x20776172 }, /* 8 bits unsigned */
{ CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
{ CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
{ CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
/* { CODEC_ID_, MKTAG('i', 'm', 'a', '4') }, *//* IMA-4 */
{ CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
{ CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
{ CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
/* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
/* MP4 tags */
/* { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, *//* MPEG 4 AAC or audio ? */
/* The standard for mpeg4 audio is still not normalised AFAIK anyway */
{ 0, 0 },
};
/* the QuickTime file format is quite convoluted...
* it has lots of index tables, each indexing something in another one...
* Here we just use what is needed to read the chunks
*/
typedef struct MOV_sample_to_chunk_tbl {
long first;
long count;
long id;
} MOV_sample_to_chunk_tbl;
typedef struct MOVStreamContext {
int ffindex; /* the ffmpeg stream id */
int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */
long next_chunk;
long chunk_count;
INT64 *chunk_offsets;
long sample_to_chunk_sz;
MOV_sample_to_chunk_tbl *sample_to_chunk;
long sample_size;
long sample_count;
long *sample_sizes;
} MOVStreamContext;
typedef struct MOVContext {
int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */
AVFormatContext *fc;
long time_scale;
int found_moov; /* when both 'moov' and 'mdat' sections has been found */
int found_mdat; /* we suppose we have enough data to read the file */
INT64 mdat_size;
INT64 mdat_offset;
int total_streams;
/* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
* but we need the info to be able to skip data from those streams in the 'mdat' section
*/
MOVStreamContext *streams[MAX_STREAMS];
INT64 next_chunk_offset;
} MOVContext;
struct MOVParseTableEntry;
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
/* those functions parse an atom */
/* return code:
1: found what I wanted, exit
0: continue to parse next atom
-1: error occured, exit
*/
typedef int (*mov_parse_function)(struct MOVParseTableEntry *parse_table,
ByteIOContext *pb,
UINT32 atom_type,
INT64 atom_offset, /* after the size and type field (and eventually the extended size) */
INT64 atom_size, /* total size (excluding the size and type fields) */
void *param);
/* links atom IDs to parse functions */
typedef struct MOVParseTableEntry {
UINT32 type;
mov_parse_function func;
} MOVParseTableEntry;
static int parse_leaf(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
#ifdef DEBUG
print_atom("leaf", atom_type, atom_offset, atom_size);
#endif
if(atom_size>1)
url_fskip(pb, atom_size);
/* url_seek(pb, atom_offset+atom_size, SEEK_SET); */
return 0;
}
static int parse_default(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
UINT32 type, foo=0;
UINT64 offset, size;
UINT64 total_size = 0;
int i;
int err = 0;
foo=0;
#ifdef DEBUG
print_atom("default", atom_type, atom_offset, atom_size);
debug_indent++;
#endif
offset = atom_offset;
if(atom_size < 0)
atom_size = 0x0FFFFFFFFFFFFFFF;
while((total_size < atom_size) && !url_feof(pb) && !err) {
size=atom_size;
type=0L;
if(atom_size >= 8) {
size = get_be32(pb);
type = get_le32(pb);
}
total_size += 8;
offset+=8;
// printf("type: %08lx sz: %08lx", type, size);
if(size == 1) { /* 64 bit extended size */
size = get_be64(pb);
offset+=8;
total_size+=8;
size-=8;
}
if(size == 0)
size = atom_size - total_size;
size-=8;
for(i=0; parse_table[i].type != 0L && parse_table[i].type != type; i++);
// printf(" i=%ld\n", i);
if(parse_table[i].type == NULL) { /* skip leaf atoms data */
// url_seek(pb, atom_offset+atom_size, SEEK_SET);
#ifdef DEBUG
print_atom("unknown", type, offset, size);
#endif
url_fskip(pb, size);
} else
err = (parse_table[i].func)(parse_table, pb, type, offset, size, param);
offset+=size;
total_size+=size;
}
#ifdef DEBUG
debug_indent--;
#endif
return err;
}
static int parse_mvhd(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
#ifdef DEBUG
print_atom("mvhd", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
get_be32(pb); /* creation time */
get_be32(pb); /* modification time */
c->time_scale = get_be32(pb); /* time scale */
get_be32(pb); /* duration */
get_be32(pb); /* preferred scale */
get_be16(pb); /* preferred volume */
url_fskip(pb, 10); /* reserved */
url_fskip(pb, 36); /* display matrix */
get_be32(pb); /* preview time */
get_be32(pb); /* preview duration */
get_be32(pb); /* poster time */
get_be32(pb); /* selection time */
get_be32(pb); /* selection duration */
get_be32(pb); /* current time */
get_be32(pb); /* next track ID */
return 0;
}
/* this atom should contain all header atoms */
static int parse_moov(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
int err;
MOVContext *c;
#ifdef DEBUG
print_atom("moov", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
err = parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);
/* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
/* so we don't parse the whole file if over a network */
c->found_moov=1;
if(c->found_mdat)
return 1; /* found both, just go */
return 0; /* now go for mdat */
}
/* this atom contains actual media data */
static int parse_mdat(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
int err;
MOVContext *c;
#ifdef DEBUG
print_atom("mdat", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
if(atom_size == 0) /* wrong one (MP4) */
return 0;
c->found_mdat=1;
c->mdat_offset = atom_offset;
c->mdat_size = atom_size;
if(c->found_moov)
return 1; /* found both, just go */
url_fskip(pb, atom_size);
return 0; /* now go for moov */
}
static int parse_trak(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("trak", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = malloc(sizeof(AVStream));
if (!st) return -2;
memset(st, 0, sizeof(AVStream));
c->fc->streams[c->fc->nb_streams] = st;
sc = malloc(sizeof(MOVStreamContext));
st->priv_data = sc;
st->codec.codec_type = CODEC_TYPE_MOV_OTHER;
c->streams[c->fc->nb_streams++] = sc;
return parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);
}
static int parse_tkhd(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
AVStream *st;
#ifdef DEBUG
print_atom("tkhd", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
get_byte(pb); /* version */
get_byte(pb); get_byte(pb);
get_byte(pb); /* flags */
/*
MOV_TRACK_ENABLED 0x0001
MOV_TRACK_IN_MOVIE 0x0002
MOV_TRACK_IN_PREVIEW 0x0004
MOV_TRACK_IN_POSTER 0x0008
*/
get_be32(pb); /* creation time */
get_be32(pb); /* modification time */
st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
get_be32(pb); /* reserved */
get_be32(pb); /* duration */
get_be32(pb); /* reserved */
get_be32(pb); /* reserved */
get_be16(pb); /* layer */
get_be16(pb); /* alternate group */
get_be16(pb); /* volume */
get_be16(pb); /* reserved */
url_fskip(pb, 36); /* display matrix */
/* those are fixed-point */
st->codec.width = get_be32(pb) >> 16; /* track width */
st->codec.height = get_be32(pb) >> 16; /* track height */
return 0;
}
static int parse_hdlr(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int len;
char *buf, ch;
UINT32 type;
AVStream *st;
UINT32 ctype;
#ifdef DEBUG
print_atom("hdlr", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
/* component type */
ctype = get_le32(pb);
type = get_le32(pb); /* component subtype */
#ifdef DEBUG
printf("ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], ctype);
printf("stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
#endif
#ifdef DEBUG
/* XXX: yeah this is ugly... */
if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
if(type == MKTAG('v', 'i', 'd', 'e'))
puts("hdlr: vide");
else if(type == MKTAG('s', 'o', 'u', 'n'))
puts("hdlr: soun");
} else if(ctype == 0) { /* MP4 */
if(type == MKTAG('v', 'i', 'd', 'e'))
puts("hdlr: vide");
else if(type == MKTAG('s', 'o', 'u', 'n'))
puts("hdlr: soun");
else if(type == MKTAG('o', 'd', 's', 'm'))
puts("hdlr: odsm");
else if(type == MKTAG('s', 'd', 's', 'm'))
puts("hdlr: sdsm");
} else puts("hdlr: meta");
#endif
if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
if(type == MKTAG('v', 'i', 'd', 'e'))
st->codec.codec_type = CODEC_TYPE_VIDEO;
else if(type == MKTAG('s', 'o', 'u', 'n'))
st->codec.codec_type = CODEC_TYPE_AUDIO;
} else if(ctype == 0) { /* MP4 */
if(type == MKTAG('v', 'i', 'd', 'e'))
st->codec.codec_type = CODEC_TYPE_VIDEO;
else if(type == MKTAG('s', 'o', 'u', 'n'))
st->codec.codec_type = CODEC_TYPE_AUDIO;
}
get_be32(pb); /* component manufacture */
get_be32(pb); /* component flags */
get_be32(pb); /* component flags mask */
if(atom_size <= 24)
return 0; /* nothing left to read */
/* XXX: MP4 uses a C string, not a pascal one */
/* component name */
if(c->mp4) {
#ifdef DEBUG
puts("MP4!!!");
#endif
while(ch=get_byte(pb));
} else {
len = get_byte(pb);
if(len) {
buf = malloc(len+1);
get_buffer(pb, buf, len);
buf[len] = '\0';
#ifdef DEBUG
puts(buf);
#endif
free(buf);
}
}
return 0;
}
static int parse_stsd(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, size, samp_sz, frames_per_sample;
char *buf;
UINT32 format;
AVStream *st;
#ifdef DEBUG
print_atom("stsd", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
while(entries--) {
size = get_be32(pb); /* size */
format = get_le32(pb); /* data format */
get_be32(pb); /* reserved */
get_be16(pb); /* reserved */
get_be16(pb); /* index */
/* if(format == MKTAG('m', 'p', '4', 'v')) */
/* st->codec.codec_type=CODEC_TYPE_VIDEO; *//* force things (XXX: was this for .mp4 ?) */
if(st->codec.codec_type==CODEC_TYPE_VIDEO) {
st->codec.codec_tag = format;
st->codec.codec_id = codec_get_id(mov_video_tags, format);
get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
get_be32(pb); /* temporal quality */
get_be32(pb); /* spacial quality */
st->codec.width = get_be16(pb); /* width */
st->codec.height = get_be16(pb); /* height */
get_be32(pb); /* horiz resolution */
get_be32(pb); /* vert resolution */
get_be32(pb); /* data size, always 0 */
frames_per_sample = get_be16(pb); /* frame per samples */
#ifdef DEBUG
printf("frames/samples = %ld\n", frames_per_sample);
#endif
url_fskip(pb, 32); /* codec name */
get_be16(pb); /* depth */
get_be16(pb); /* colortable id */
get_be16(pb); /* */
get_be16(pb); /* */
st->codec.sample_rate = 25 * FRAME_RATE_BASE;
if(size > 16)
url_fskip(pb, size-(16+24+18+32));
} else {
st->codec.codec_tag = format;
get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
st->codec.channels = get_be16(pb);/* channel count */
samp_sz = get_be16(pb); /* sample size */
#ifdef DEBUG
if(samp_sz != 16)
puts("!!! stsd: audio sample size is not 16 bit !");
#endif
st->codec.codec_id = codec_get_id(mov_audio_tags, format);
/* handle specific s8 codec */
if (st->codec.codec_id == CODEC_ID_PCM_S16BE && samp_sz == 8)
st->codec.codec_id = CODEC_ID_PCM_S8;
get_be16(pb); /* compression id = 0*/
get_be16(pb); /* packet size = 0 */
st->codec.sample_rate = ((get_be32(pb) >> 16));
st->codec.bit_rate = 0;
/* this is for .mp4 files */
if(format == MKTAG('m', 'p', '4', 'v')) { /* XXX */
st->codec.codec_type=CODEC_TYPE_VIDEO; /* force things */
st->codec.codec_id = CODEC_ID_MPEG4;
st->codec.frame_rate = 25;
st->codec.bit_rate = 100000;
}
#if 0
get_be16(pb); get_be16(pb); /* */
get_be16(pb); /* */
get_be16(pb); /* */
get_be16(pb); /* */
get_be16(pb); /* */
#endif
if(size > 16)
url_fskip(pb, size-(16+20));
}
#ifdef DEBUG
printf("4CC= %c%c%c%c\n", *((char *)&format), ((char *)&format)[1], ((char *)&format)[2], ((char *)&format)[3]);
#endif
}
/*
if(len) {
buf = malloc(len+1);
get_buffer(pb, buf, len);
buf[len] = '\0';
puts(buf);
free(buf);
}
*/
return 0;
}
static int parse_stco(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, i;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("stco", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
sc = (MOVStreamContext *)st->priv_data;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
sc->chunk_count = entries;
sc->chunk_offsets = malloc(entries * sizeof(INT64));
if(atom_type == MKTAG('s', 't', 'c', 'o')) {
for(i=0; i<entries; i++) {
sc->chunk_offsets[i] = get_be32(pb);
/*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/
}
} else if(atom_type == MKTAG('c', 'o', '6', '4')) {
for(i=0; i<entries; i++) {
sc->chunk_offsets[i] = get_be64(pb);
/*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/
}
} else
return -1;
return 0;
}
static int parse_stsc(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, i;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("stsc", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
sc = (MOVStreamContext *)st->priv_data;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
entries = get_be32(pb);
sc->sample_to_chunk_sz = entries;
sc->sample_to_chunk = malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
for(i=0; i<entries; i++) {
sc->sample_to_chunk[i].first = get_be32(pb);
sc->sample_to_chunk[i].count = get_be32(pb);
sc->sample_to_chunk[i].id = get_be32(pb);
#ifdef DEBUG
/* printf("sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); */
#endif
}
return 0;
}
static int parse_stsz(MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)
{
MOVContext *c;
int entries, i;
AVStream *st;
MOVStreamContext *sc;
#ifdef DEBUG
print_atom("stsz", atom_type, atom_offset, atom_size);
#endif
c = (MOVContext *)param;
st = c->fc->streams[c->fc->nb_streams-1];
sc = (MOVStreamContext *)st->priv_data;
get_byte(pb); /* version */
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
sc->sample_size = get_be32(pb);
entries = get_be32(pb);
sc->sample_count = entries;
printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
if(sc->sample_size)
return 0; /* there isn't any table following */
sc->sample_sizes = malloc(entries * sizeof(long));
for(i=0; i<entries; i++) {
sc->sample_sizes[i] = get_be32(pb);
#ifdef DEBUG
/* printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */
#endif
}
return 0;
}
static const MOVParseTableEntry mov_default_parse_table[] = {
/* mp4 atoms */
{ MKTAG( 'm', 'p', '4', 'a' ), parse_default },
{ MKTAG( 'c', 'o', '6', '4' ), parse_stco },
{ MKTAG( 's', 't', 'c', 'o' ), parse_stco },
{ MKTAG( 'c', 'r', 'h', 'd' ), parse_default },
{ MKTAG( 'c', 't', 't', 's' ), parse_leaf },
{ MKTAG( 'c', 'p', 'r', 't' ), parse_default },
{ MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },
{ MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },
{ MKTAG( 'd', 'i', 'n', 'f' ), parse_default },
{ MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },
{ MKTAG( 's', 't', 'd', 'p' ), parse_default },
{ MKTAG( 'e', 's', 'd', 's' ), parse_default },
{ MKTAG( 'e', 'd', 't', 's' ), parse_default },
{ MKTAG( 'e', 'l', 's', 't' ), parse_leaf },
{ MKTAG( 'u', 'u', 'i', 'd' ), parse_default },
{ MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },
{ MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },
{ MKTAG( 'h', 'm', 'h', 'd' ), parse_default },
{ MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },
{ MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },
{ MKTAG( 'm', 'p', '4', 's' ), parse_default },
{ MKTAG( 'm', 'd', 'i', 'a' ), parse_default },
{ MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },
{ MKTAG( 'm', 'd', 'h', 'd' ), parse_leaf },
{ MKTAG( 'm', 'i', 'n', 'f' ), parse_default },
{ MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },
{ MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },
{ MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },
{ MKTAG( 'o', 'd', 'h', 'd' ), parse_default },
{ MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },
{ MKTAG( 's', 't', 's', 'd' ), parse_stsd },
{ MKTAG( 's', 't', 's', 'z' ), parse_stsz },
{ MKTAG( 's', 't', 'b', 'l' ), parse_default },
{ MKTAG( 's', 't', 's', 'c' ), parse_stsc },
{ MKTAG( 's', 'd', 'h', 'd' ), parse_default },
{ MKTAG( 's', 't', 's', 'h' ), parse_default },
{ MKTAG( 's', 'k', 'i', 'p' ), parse_default },
{ MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },
{ MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },
{ MKTAG( 's', 't', 's', 's' ), parse_leaf },
{ MKTAG( 's', 't', 't', 's' ), parse_leaf },
{ MKTAG( 't', 'r', 'a', 'k' ), parse_trak },
{ MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },
{ MKTAG( 't', 'r', 'e', 'f' ), parse_default }, /* not really */
{ MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },
{ MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },
{ MKTAG( 'm', 'p', '4', 'v' ), parse_default },
/* extra mp4 */
{ MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },
/* QT atoms */
{ MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },
{ MKTAG( 'c', 'l', 'i', 'p' ), parse_default },
{ MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },
{ MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },
{ MKTAG( 'm', 'a', 't', 't' ), parse_default },
{ MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },
{ MKTAG( 'r', 'm', 'd', 'a' ), parse_default },
{ MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },
//{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },
{ MKTAG( 'r', 'm', 'r', 'a' ), parse_default },
{ MKTAG( 's', 'c', 'p', 't' ), parse_leaf },
{ MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },
{ MKTAG( 's', 's', 'r', 'c' ), parse_leaf },
{ MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },
{ MKTAG( 'w', 'i', 'd', 'e' ), parse_leaf }, /* place holder */
{ 0L, parse_leaf }
};
static void mov_free_stream_context(MOVStreamContext *sc)
{
if(sc) {
if(sc->chunk_offsets)
free(sc->chunk_offsets);
if(sc->sample_to_chunk)
free(sc->sample_to_chunk);
free(sc);
}
}
int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MOVContext *mov;
ByteIOContext *pb = &s->pb;
UINT32 tag, tag1;
int i, j, nb, bps, err;
INT64 size;
AVStream *st;
mov = malloc(sizeof(MOVContext));
if (!mov)
return -1;
memset(mov, 0, sizeof(MOVContext));
s->priv_data = mov;
mov->fc = s;
if(s->format->name[1] == 'p')
mov->mp4 = 1;
if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
size = url_filesize(url_fileno(pb));
else
size = 0x7FFFFFFFFFFFFFFF;
#ifdef DEBUG
printf("filesz=%ld\n", size);
#endif
/* check MOV header */
err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);
if(err<0 || (!mov->found_moov || !mov->found_mdat)) {
puts("header not found !!!");
exit(1);
}
#ifdef DEBUG
printf("on_parse_exit_offset=%ld\n", url_ftell(pb));
#endif
/* some cleanup : make sure we are on the mdat atom */
if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
url_fseek(pb, mov->mdat_offset, SEEK_SET);
mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
#ifdef DEBUG
printf("mdat_reset_offset=%ld\n", url_ftell(pb));
#endif
#ifdef DEBUG
printf("streams= %ld\n", s->nb_streams);
#endif
mov->total_streams = nb = s->nb_streams;
#if 1
for(i=0; i<s->nb_streams;) {
if(s->streams[i]->codec.codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
free(s->streams[i]);
for(j=i+1; j<s->nb_streams; j++)
s->streams[j-1] = s->streams[j];
s->nb_streams--;
} else
i++;
}
for(i=0; i<s->nb_streams;i++) {
MOVStreamContext *sc;
sc = (MOVStreamContext *)s->streams[i]->priv_data;
sc->ffindex = i;
sc->is_ff_stream = 1;
}
#endif
#ifdef DEBUG
printf("real streams= %ld\n", s->nb_streams);
#endif
return 0;
}
/* Yes, this is ugly... I didn't write the specs of QT :p */
/* XXX:remove useless commented code sometime */
int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
{
MOVContext *mov = s->priv_data;
INT64 offset = 0x0FFFFFFFFFFFFFFF;
int i, j;
int st_id = 0, size;
size = 0x0FFFFFFF;
again:
for(i=0; i<mov->total_streams; i++) {
/* printf("%8ld ", mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk]); */
if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)
&& (mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] < offset)) {
/* printf("y"); */
st_id = i;
offset = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk];
}
/* else printf("n"); */
}
mov->streams[st_id]->next_chunk++;
if(offset==0x0FFFFFFFFFFFFFFF)
return -1;
if(mov->next_chunk_offset < offset) /* some meta data */
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
if(!mov->streams[st_id]->is_ff_stream) {
url_fskip(&s->pb, (offset - mov->next_chunk_offset));
offset = 0x0FFFFFFFFFFFFFFF;
/* puts("*"); */
goto again;
}
/* printf("\nchunk offset = %ld\n", offset); */
/* now get the chunk size... */
for(i=0; i<mov->total_streams; i++) {
/* printf("%ld ", mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset); */
if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)
&& ((mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset) < size)) {
/* printf("y"); */
size = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset;
}
/* else printf("n"); */
}
/* printf("\nchunk size = %ld\n", size); */
if(size == 0x0FFFFFFF)
size = mov->mdat_size + mov->mdat_offset - offset;
if(size < 0)
return -1;
if(size == 0)
return -1;
av_new_packet(pkt, size);
pkt->stream_index = mov->streams[st_id]->ffindex;
get_buffer(&s->pb, pkt->data, pkt->size);
#ifdef DEBUG
/*
printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);
for(i=0; i<8; i++)
printf("%02x ", pkt->data[i]);
for(i=0; i<8; i++)
printf("%c ", (pkt->data[i]) & 0x7F);
puts("");
*/
#endif
mov->next_chunk_offset = offset + size;
return 0;
}
int mov_read_close(AVFormatContext *s)
{
int i;
MOVContext *mov = s->priv_data;
for(i=0; i<mov->total_streams; i++)
mov_free_stream_context(mov->streams[i]);
for(i=0; i<s->nb_streams; i++)
free(s->streams[i]);
free(mov);
return 0;
}
AVFormat mov_format = {
"mov",
"QuickTime format",
"video/quicktime",
"mov",
CODEC_ID_MP2,
CODEC_ID_MJPEG,
NULL,
NULL,
NULL,
mov_read_header,
mov_read_packet,
mov_read_close,
};
AVFormat mp4_format = {
"mp4",
"MPEG4 file format",
"video/mpeg4",
"mp4",
CODEC_ID_MP2,
CODEC_ID_MJPEG,
NULL,
NULL,
NULL,
mov_read_header,
mov_read_packet,
mov_read_close,
};

4
libav/utils.c
Unescape View File

@ -138,10 +138,14 @@ void register_all(void)
register_avformat(&rm_format);
register_avformat(&asf_format);
register_avformat(&avi_format);
register_avformat(&mov_format);
register_avformat(&mp4_format);
register_avformat(&mpjpeg_format);
register_avformat(&jpeg_format);
register_avformat(&single_jpeg_format);
register_avformat(&swf_format);
register_avformat(&gif_format);
register_avformat(&au_format);
register_avformat(&wav_format);
register_avformat(&pcm_s16le_format);
register_avformat(&pcm_s16be_format);

Write Preview
Loading…
Cancel
Save