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* 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
This commit is contained in:
Zdenek Kabelac 2002-04-08 12:32:01 +00:00
parent 0129e7b3e6
commit 6cea494e32
6 changed files with 1570 additions and 1 deletions
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2
libav/Makefile
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@ -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 Normal file
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@ -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
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@ -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 Normal file
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@ -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 */
};

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libav/mov.c Normal file
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@ -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
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);