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/* |
7fbde343 |
* NSV demuxer |
406792e7 |
* Copyright (c) 2004 The FFmpeg Project |
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* |
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* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
27d5f18f |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/
#include "avformat.h" |
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#include "riff.h" |
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|
14f283d8 |
//#define DEBUG |
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//#define DEBUG_DUMP_INDEX // XXX dumbdriving-271.nsv breaks with it commented!!
//#define DEBUG_SEEK
#define CHECK_SUBSEQUENT_NSVS
//#define DISABLE_AUDIO
/* max bytes to crawl for trying to resync
* stupid streaming servers don't start at chunk boundaries...
*/
#define NSV_MAX_RESYNC (500*1024)
#define NSV_MAX_RESYNC_TRIES 300
/*
* First version by Francois Revol - revol@free.fr
* References:
* (1) http://www.multimedia.cx/nsv-format.txt
* seems someone came to the same conclusions as me, and updated it:
* (2) http://www.stud.ktu.lt/~vitslav/nsv/nsv-format.txt
* http://www.stud.ktu.lt/~vitslav/nsv/ |
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* official docs
* (3) http://ultravox.aol.com/NSVFormat.rtf |
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* Sample files:
* (S1) http://www.nullsoft.com/nsv/samples/
* http://www.nullsoft.com/nsv/samples/faster.nsv
* http://streamripper.sourceforge.net/openbb/read.php?TID=492&page=4
*/
/*
* notes on the header (Francois Revol): |
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*
* It is followed by strings, then a table, but nothing tells |
27d5f18f |
* where the table begins according to (1). After checking faster.nsv,
* I believe NVSf[16-19] gives the size of the strings data
* (that is the offset of the data table after the header).
* After checking all samples from (S1) all confirms this.
*
* Then, about NSVf[12-15], faster.nsf has 179700. When veiwing it in VLC,
* I noticed there was about 1 NVSs chunk/s, so I ran
* strings faster.nsv | grep NSVs | wc -l |
115329f1 |
* which gave me 180. That leads me to think that NSVf[12-15] might be the |
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* file length in milliseconds.
* Let's try that:
* for f in *.nsv; do HTIME="$(od -t x4 "$f" | head -1 | sed 's/.* //')"; echo "'$f' $((0x$HTIME))s = $((0x$HTIME/1000/60)):$((0x$HTIME/1000%60))"; done
* except for nstrailer (which doesn't have an NSVf header), it repports correct time.
* |
115329f1 |
* nsvtrailer.nsv (S1) does not have any NSVf header, only NSVs chunks, |
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* so the header seems to not be mandatory. (for streaming). |
115329f1 |
* |
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* index slice duration check (excepts nsvtrailer.nsv):
* for f in [^n]*.nsv; do DUR="$(ffmpeg -i "$f" 2>/dev/null | grep 'NSVf duration' | cut -d ' ' -f 4)"; IC="$(ffmpeg -i "$f" 2>/dev/null | grep 'INDEX ENTRIES' | cut -d ' ' -f 2)"; echo "duration $DUR, slite time $(($DUR/$IC))"; done
*/
/*
* TODO:
* - handle timestamps !!!
* - use index
* - mime-type in probe()
* - seek
*/
#ifdef DEBUG
#define PRINT(_v) printf _v
#else |
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#define PRINT(_v) |
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#endif
#if 0
struct NSVf_header {
uint32_t chunk_tag; /* 'NSVf' */
uint32_t chunk_size; |
755bfeab |
uint32_t file_size; /* max 4GB ??? no one learns anything it seems :^) */ |
27d5f18f |
uint32_t file_length; //unknown1; /* what about MSB of file_size ? */
uint32_t info_strings_size; /* size of the info strings */ //unknown2;
uint32_t table_entries;
uint32_t table_entries_used; /* the left ones should be -1 */
};
struct NSVs_header {
uint32_t chunk_tag; /* 'NSVs' */
uint32_t v4cc; /* or 'NONE' */
uint32_t a4cc; /* or 'NONE' */
uint16_t vwidth; /* assert(vwidth%16==0) */
uint16_t vheight; /* assert(vheight%16==0) */
uint8_t framerate; /* value = (framerate&0x80)?frtable[frameratex0x7f]:framerate */
uint16_t unknown;
};
struct nsv_avchunk_header {
uint8_t vchunk_size_lsb;
uint16_t vchunk_size_msb; /* value = (vchunk_size_msb << 4) | (vchunk_size_lsb >> 4) */
uint16_t achunk_size;
};
struct nsv_pcm_header {
uint8_t bits_per_sample;
uint8_t channel_count;
uint16_t sample_rate;
};
#endif
/* variation from avi.h */
/*typedef struct CodecTag {
int id;
unsigned int tag;
} CodecTag;*/
/* tags */
#define T_NSVF MKTAG('N', 'S', 'V', 'f') /* file header */
#define T_NSVS MKTAG('N', 'S', 'V', 's') /* chunk header */
#define T_TOC2 MKTAG('T', 'O', 'C', '2') /* extra index marker */
#define T_NONE MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */
#define T_SUBT MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */
#define T_ASYN MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */
#define T_KEYF MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */
#define TB_NSVF MKBETAG('N', 'S', 'V', 'f')
#define TB_NSVS MKBETAG('N', 'S', 'V', 's')
|
f4433de9 |
/* hardcoded stream indexes */ |
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#define NSV_ST_VIDEO 0
#define NSV_ST_AUDIO 1
#define NSV_ST_SUBT 2
enum NSVStatus {
NSV_UNSYNC,
NSV_FOUND_NSVF,
NSV_HAS_READ_NSVF,
NSV_FOUND_NSVS,
NSV_HAS_READ_NSVS,
NSV_FOUND_BEEF,
NSV_GOT_VIDEO,
NSV_GOT_AUDIO,
};
typedef struct NSVStream {
int frame_offset; /* current frame (video) or byte (audio) counter
(used to compute the pts) */
int scale; |
115329f1 |
int rate; |
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int sample_size; /* audio only data */
int start; |
115329f1 |
|
27d5f18f |
int new_frame_offset; /* temporary storage (used during seek) */
int cum_len; /* temporary storage (used during seek) */
} NSVStream;
typedef struct {
int base_offset;
int NSVf_end;
uint32_t *nsvf_index_data;
int index_entries;
enum NSVStatus state;
AVPacket ahead[2]; /* [v, a] if .data is !NULL there is something */
/* cached */
int64_t duration;
uint32_t vtag, atag;
uint16_t vwidth, vheight; |
2f394e1c |
int16_t avsync; |
2615800a |
AVRational framerate; |
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//DVDemuxContext* dv_demux;
} NSVContext;
|
7caf0cc6 |
static const AVCodecTag nsv_codec_video_tags[] = { |
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{ CODEC_ID_VP3, MKTAG('V', 'P', '3', ' ') },
{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, |
5ce117c3 |
{ CODEC_ID_VP5, MKTAG('V', 'P', '5', ' ') },
{ CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') }, |
9110a0e3 |
{ CODEC_ID_VP6, MKTAG('V', 'P', '6', ' ') },
{ CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
{ CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') }, |
5ce117c3 |
{ CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') }, |
27d5f18f |
/*
{ CODEC_ID_VP4, MKTAG('V', 'P', '4', ' ') },
{ CODEC_ID_VP4, MKTAG('V', 'P', '4', '0') },
*/ |
755bfeab |
{ CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') }, /* cf sample xvid decoder from nsv_codec_sdk.zip */ |
27d5f18f |
{ CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', '3') },
{ 0, 0 },
};
|
7caf0cc6 |
static const AVCodecTag nsv_codec_audio_tags[] = { |
27d5f18f |
{ CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
{ CODEC_ID_AAC, MKTAG('A', 'A', 'C', ' ') },
{ CODEC_ID_AAC, MKTAG('A', 'A', 'C', 'P') }, /* _CUTTED__MUXED_2 Heads - Out Of The City.nsv */
{ CODEC_ID_PCM_U16LE, MKTAG('P', 'C', 'M', ' ') },
{ 0, 0 },
};
//static int nsv_load_index(AVFormatContext *s);
static int nsv_read_chunk(AVFormatContext *s, int fill_header);
#ifdef DEBUG
static void print_tag(const char *str, unsigned int tag, int size)
{
printf("%s: tag=%c%c%c%c\n",
str, tag & 0xff,
(tag >> 8) & 0xff,
(tag >> 16) & 0xff,
(tag >> 24) & 0xff);
}
#endif
/* try to find something we recognize, and set the state accordingly */
static int nsv_resync(AVFormatContext *s)
{
NSVContext *nsv = s->priv_data; |
899681cd |
ByteIOContext *pb = s->pb; |
e4917f59 |
uint32_t v = 0; |
27d5f18f |
int i; |
115329f1 |
|
4733abcb |
PRINT(("%s(), offset = %"PRId64", state = %d\n", __FUNCTION__, url_ftell(pb), nsv->state)); |
115329f1 |
|
27d5f18f |
//nsv->state = NSV_UNSYNC; |
115329f1 |
|
27d5f18f |
for (i = 0; i < NSV_MAX_RESYNC; i++) {
if (url_feof(pb)) {
PRINT(("NSV EOF\n"));
nsv->state = NSV_UNSYNC;
return -1;
}
v <<= 8;
v |= get_byte(pb);
/*
if (i < 8) {
PRINT(("NSV resync: [%d] = %02x\n", i, v & 0x0FF));
}
*/ |
115329f1 |
|
27d5f18f |
if ((v & 0x0000ffff) == 0xefbe) { /* BEEF */
PRINT(("NSV resynced on BEEF after %d bytes\n", i+1));
nsv->state = NSV_FOUND_BEEF;
return 0;
}
/* we read as big endian, thus the MK*BE* */
if (v == TB_NSVF) { /* NSVf */
PRINT(("NSV resynced on NSVf after %d bytes\n", i+1));
nsv->state = NSV_FOUND_NSVF;
return 0;
}
if (v == MKBETAG('N', 'S', 'V', 's')) { /* NSVs */
PRINT(("NSV resynced on NSVs after %d bytes\n", i+1));
nsv->state = NSV_FOUND_NSVS;
return 0;
} |
115329f1 |
|
27d5f18f |
}
PRINT(("NSV sync lost\n"));
return -1;
}
static int nsv_parse_NSVf_header(AVFormatContext *s, AVFormatParameters *ap)
{
NSVContext *nsv = s->priv_data; |
899681cd |
ByteIOContext *pb = s->pb; |
88730be6 |
unsigned int file_size, size; |
27d5f18f |
int64_t duration;
int strings_size;
int table_entries;
int table_entries_used;
PRINT(("%s()\n", __FUNCTION__));
nsv->state = NSV_UNSYNC; /* in case we fail */ |
115329f1 |
|
27d5f18f |
size = get_le32(pb);
if (size < 28)
return -1;
nsv->NSVf_end = size;
//s->file_size = (uint32_t)get_le32(pb);
file_size = (uint32_t)get_le32(pb); |
bf4e3bd2 |
PRINT(("NSV NSVf chunk_size %u\n", size));
PRINT(("NSV NSVf file_size %u\n", file_size)); |
27d5f18f |
|
c0df9d75 |
nsv->duration = duration = get_le32(pb); /* in ms */ |
4733abcb |
PRINT(("NSV NSVf duration %"PRId64" ms\n", duration)); |
27d5f18f |
// XXX: store it in AVStreams
strings_size = get_le32(pb);
table_entries = get_le32(pb);
table_entries_used = get_le32(pb); |
115329f1 |
PRINT(("NSV NSVf info-strings size: %d, table entries: %d, bis %d\n", |
27d5f18f |
strings_size, table_entries, table_entries_used));
if (url_feof(pb))
return -1; |
115329f1 |
|
4733abcb |
PRINT(("NSV got header; filepos %"PRId64"\n", url_ftell(pb))); |
27d5f18f |
if (strings_size > 0) {
char *strings; /* last byte will be '\0' to play safe with str*() */
char *p, *endp;
char *token, *value;
char quote;
p = strings = av_mallocz(strings_size + 1);
endp = strings + strings_size;
get_buffer(pb, strings, strings_size);
while (p < endp) {
while (*p == ' ')
p++; /* strip out spaces */
if (p >= endp-2)
break;
token = p;
p = strchr(p, '=');
if (!p || p >= endp-2)
break;
*p++ = '\0';
quote = *p++;
value = p;
p = strchr(p, quote);
if (!p || p >= endp)
break;
*p++ = '\0';
PRINT(("NSV NSVf INFO: %s='%s'\n", token, value)); |
a233eaa6 |
av_metadata_set(&s->metadata, token, value); |
27d5f18f |
}
av_free(strings);
}
if (url_feof(pb))
return -1; |
115329f1 |
|
4733abcb |
PRINT(("NSV got infos; filepos %"PRId64"\n", url_ftell(pb))); |
27d5f18f |
if (table_entries_used > 0) {
nsv->index_entries = table_entries_used; |
568e18b1 |
if((unsigned)table_entries >= UINT_MAX / sizeof(uint32_t))
return -1; |
27d5f18f |
nsv->nsvf_index_data = av_malloc(table_entries * sizeof(uint32_t)); |
4733abcb |
#warning "FIXME: Byteswap buffer as needed"
get_buffer(pb, (unsigned char *)nsv->nsvf_index_data, table_entries * sizeof(uint32_t)); |
27d5f18f |
}
|
4733abcb |
PRINT(("NSV got index; filepos %"PRId64"\n", url_ftell(pb))); |
115329f1 |
|
27d5f18f |
#ifdef DEBUG_DUMP_INDEX
#define V(v) ((v<0x20 || v > 127)?'.':v)
/* dump index */
PRINT(("NSV %d INDEX ENTRIES:\n", table_entries));
PRINT(("NSV [dataoffset][fileoffset]\n", table_entries));
for (i = 0; i < table_entries; i++) {
unsigned char b[8];
url_fseek(pb, size + nsv->nsvf_index_data[i], SEEK_SET);
get_buffer(pb, b, 8);
PRINT(("NSV [0x%08lx][0x%08lx]: %02x %02x %02x %02x %02x %02x %02x %02x"
"%c%c%c%c%c%c%c%c\n",
nsv->nsvf_index_data[i], size + nsv->nsvf_index_data[i], |
115329f1 |
b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], |
27d5f18f |
V(b[0]), V(b[1]), V(b[2]), V(b[3]), V(b[4]), V(b[5]), V(b[6]), V(b[7]) ));
}
//url_fseek(pb, size, SEEK_SET); /* go back to end of header */
#undef V
#endif |
115329f1 |
|
27d5f18f |
url_fseek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */ |
115329f1 |
|
27d5f18f |
if (url_feof(pb))
return -1;
nsv->state = NSV_HAS_READ_NSVF;
return 0;
}
static int nsv_parse_NSVs_header(AVFormatContext *s, AVFormatParameters *ap)
{
NSVContext *nsv = s->priv_data; |
899681cd |
ByteIOContext *pb = s->pb; |
27d5f18f |
uint32_t vtag, atag;
uint16_t vwidth, vheight; |
c8389233 |
AVRational framerate;
int i; |
27d5f18f |
AVStream *st;
NSVStream *nst;
PRINT(("%s()\n", __FUNCTION__));
vtag = get_le32(pb);
atag = get_le32(pb);
vwidth = get_le16(pb);
vheight = get_le16(pb); |
c8389233 |
i = get_byte(pb); |
0a4250bc |
|
c8389233 |
PRINT(("NSV NSVs framerate code %2x\n", i)); |
0a4250bc |
if(i&0x80) { /* odd way of giving native framerates from docs */
int t=(i & 0x7F)>>2;
if(t<16) framerate = (AVRational){1, t+1};
else framerate = (AVRational){t-15, 1};
if(i&1){
framerate.num *= 1000;
framerate.den *= 1001;
}
if((i&3)==3) framerate.num *= 24;
else if((i&3)==2) framerate.num *= 25;
else framerate.num *= 30;
}
else
framerate= (AVRational){i, 1};
|
2f394e1c |
nsv->avsync = get_le16(pb); |
2615800a |
nsv->framerate = framerate; |
27d5f18f |
#ifdef DEBUG
print_tag("NSV NSVs vtag", vtag, 0);
print_tag("NSV NSVs atag", atag, 0);
PRINT(("NSV NSVs vsize %dx%d\n", vwidth, vheight));
#endif |
115329f1 |
|
27d5f18f |
/* XXX change to ap != NULL ? */
if (s->nb_streams == 0) { /* streams not yet published, let's do that */
nsv->vtag = vtag;
nsv->atag = atag;
nsv->vwidth = vwidth;
nsv->vheight = vwidth;
if (vtag != T_NONE) {
st = av_new_stream(s, NSV_ST_VIDEO);
if (!st)
goto fail;
nst = av_mallocz(sizeof(NSVStream));
if (!nst)
goto fail;
st->priv_data = nst; |
01f4895c |
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_tag = vtag;
st->codec->codec_id = codec_get_id(nsv_codec_video_tags, vtag);
st->codec->width = vwidth;
st->codec->height = vheight; |
dd1c8f3e |
st->codec->bits_per_coded_sample = 24; /* depth XXX */ |
27d5f18f |
|
c8389233 |
av_set_pts_info(st, 64, framerate.den, framerate.num); |
27d5f18f |
st->start_time = 0; |
c0df9d75 |
st->duration = av_rescale(nsv->duration, framerate.num, 1000*framerate.den); |
27d5f18f |
}
if (atag != T_NONE) {
#ifndef DISABLE_AUDIO
st = av_new_stream(s, NSV_ST_AUDIO);
if (!st)
goto fail;
nst = av_mallocz(sizeof(NSVStream));
if (!nst)
goto fail;
st->priv_data = nst; |
01f4895c |
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_tag = atag;
st->codec->codec_id = codec_get_id(nsv_codec_audio_tags, atag); |
115329f1 |
|
57004ff1 |
st->need_parsing = AVSTREAM_PARSE_FULL; /* for PCM we will read a chunk later and put correct info */ |
27d5f18f |
|
2f394e1c |
/* set timebase to common denominator of ms and framerate */
av_set_pts_info(st, 64, 1, framerate.num*1000);
st->start_time = 0;
st->duration = (int64_t)nsv->duration * framerate.num; |
27d5f18f |
#endif
}
#ifdef CHECK_SUBSEQUENT_NSVS
} else {
if (nsv->vtag != vtag || nsv->atag != atag || nsv->vwidth != vwidth || nsv->vheight != vwidth) {
PRINT(("NSV NSVs header values differ from the first one!!!\n"));
//return -1;
}
#endif /* CHECK_SUBSEQUENT_NSVS */
}
nsv->state = NSV_HAS_READ_NSVS;
return 0;
fail:
/* XXX */
nsv->state = NSV_UNSYNC;
return -1;
}
static int nsv_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
NSVContext *nsv = s->priv_data; |
88730be6 |
int i, err; |
27d5f18f |
PRINT(("%s()\n", __FUNCTION__));
PRINT(("filename '%s'\n", s->filename));
nsv->state = NSV_UNSYNC;
nsv->ahead[0].data = nsv->ahead[1].data = NULL; |
115329f1 |
|
27d5f18f |
for (i = 0; i < NSV_MAX_RESYNC_TRIES; i++) {
if (nsv_resync(s) < 0)
return -1;
if (nsv->state == NSV_FOUND_NSVF)
err = nsv_parse_NSVf_header(s, ap);
/* we need the first NSVs also... */
if (nsv->state == NSV_FOUND_NSVS) {
err = nsv_parse_NSVs_header(s, ap);
break; /* we just want the first one */
}
}
if (s->nb_streams < 1) /* no luck so far */
return -1;
/* now read the first chunk, so we can attempt to decode more info */
err = nsv_read_chunk(s, 1); |
115329f1 |
|
27d5f18f |
PRINT(("parsed header\n"));
return 0;
}
static int nsv_read_chunk(AVFormatContext *s, int fill_header)
{
NSVContext *nsv = s->priv_data; |
899681cd |
ByteIOContext *pb = s->pb; |
27d5f18f |
AVStream *st[2] = {NULL, NULL};
NSVStream *nst;
AVPacket *pkt;
int i, err = 0; |
e4917f59 |
uint8_t auxcount; /* number of aux metadata, also 4 bits of vsize */
uint32_t vsize;
uint16_t asize;
uint16_t auxsize;
uint32_t auxtag; |
115329f1 |
|
27d5f18f |
PRINT(("%s(%d)\n", __FUNCTION__, fill_header)); |
115329f1 |
|
27d5f18f |
if (nsv->ahead[0].data || nsv->ahead[1].data)
return 0; //-1; /* hey! eat what you've in your plate first! */
null_chunk_retry:
if (url_feof(pb))
return -1; |
115329f1 |
|
27d5f18f |
for (i = 0; i < NSV_MAX_RESYNC_TRIES && nsv->state < NSV_FOUND_NSVS && !err; i++)
err = nsv_resync(s);
if (err < 0)
return err;
if (nsv->state == NSV_FOUND_NSVS)
err = nsv_parse_NSVs_header(s, NULL);
if (err < 0)
return err;
if (nsv->state != NSV_HAS_READ_NSVS && nsv->state != NSV_FOUND_BEEF)
return -1; |
115329f1 |
|
27d5f18f |
auxcount = get_byte(pb);
vsize = get_le16(pb);
asize = get_le16(pb);
vsize = (vsize << 4) | (auxcount >> 4);
auxcount &= 0x0f; |
bf4e3bd2 |
PRINT(("NSV CHUNK %d aux, %u bytes video, %d bytes audio\n", auxcount, vsize, asize)); |
27d5f18f |
/* skip aux stuff */
for (i = 0; i < auxcount; i++) {
auxsize = get_le16(pb);
auxtag = get_le32(pb); |
115329f1 |
PRINT(("NSV aux data: '%c%c%c%c', %d bytes\n",
(auxtag & 0x0ff),
((auxtag >> 8) & 0x0ff), |
27d5f18f |
((auxtag >> 16) & 0x0ff),
((auxtag >> 24) & 0x0ff),
auxsize));
url_fskip(pb, auxsize); |
e4917f59 |
vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming braindead */ |
27d5f18f |
} |
115329f1 |
|
27d5f18f |
if (url_feof(pb))
return -1;
if (!vsize && !asize) {
nsv->state = NSV_UNSYNC;
goto null_chunk_retry;
} |
115329f1 |
|
27d5f18f |
/* map back streams to v,a */
if (s->streams[0])
st[s->streams[0]->id] = s->streams[0];
if (s->streams[1])
st[s->streams[1]->id] = s->streams[1]; |
115329f1 |
|
27d5f18f |
if (vsize/* && st[NSV_ST_VIDEO]*/) {
nst = st[NSV_ST_VIDEO]->priv_data;
pkt = &nsv->ahead[NSV_ST_VIDEO]; |
2692067a |
av_get_packet(pb, pkt, vsize); |
27d5f18f |
pkt->stream_index = st[NSV_ST_VIDEO]->index;//NSV_ST_VIDEO; |
8076609a |
pkt->dts = nst->frame_offset; |
2f394e1c |
pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */ |
27d5f18f |
/*
for (i = 0; i < MIN(8, vsize); i++)
PRINT(("NSV video: [%d] = %02x\n", i, pkt->data[i]));
*/
} |
638f489c |
if(st[NSV_ST_VIDEO]) |
fffd6a5f |
((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset++; |
8076609a |
|
27d5f18f |
if (asize/*st[NSV_ST_AUDIO]*/) {
nst = st[NSV_ST_AUDIO]->priv_data;
pkt = &nsv->ahead[NSV_ST_AUDIO];
/* read raw audio specific header on the first audio chunk... */
/* on ALL audio chunks ?? seems so! */ |
01f4895c |
if (asize && st[NSV_ST_AUDIO]->codec->codec_tag == MKTAG('P', 'C', 'M', ' ')/* && fill_header*/) { |
27d5f18f |
uint8_t bps;
uint8_t channels;
uint16_t samplerate;
bps = get_byte(pb);
channels = get_byte(pb);
samplerate = get_le16(pb);
asize-=4; |
bf4e3bd2 |
PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate)); |
27d5f18f |
if (fill_header) { |
57004ff1 |
st[NSV_ST_AUDIO]->need_parsing = AVSTREAM_PARSE_NONE; /* we know everything */ |
27d5f18f |
if (bps != 16) {
PRINT(("NSV AUDIO bit/sample != 16 (%d)!!!\n", bps));
}
bps /= channels; // ???
if (bps == 8) |
01f4895c |
st[NSV_ST_AUDIO]->codec->codec_id = CODEC_ID_PCM_U8; |
27d5f18f |
samplerate /= 4;/* UGH ??? XXX */
channels = 1; |
01f4895c |
st[NSV_ST_AUDIO]->codec->channels = channels;
st[NSV_ST_AUDIO]->codec->sample_rate = samplerate; |
bf4e3bd2 |
PRINT(("NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate)); |
27d5f18f |
}
} |
2692067a |
av_get_packet(pb, pkt, asize); |
27d5f18f |
pkt->stream_index = st[NSV_ST_AUDIO]->index;//NSV_ST_AUDIO; |
2f394e1c |
pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */
if( nsv->state == NSV_HAS_READ_NSVS && st[NSV_ST_VIDEO] ) {
/* on a nsvs frame we have new information on a/v sync */
pkt->dts = (((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset-1); |
2615800a |
pkt->dts *= (int64_t)1000 * nsv->framerate.den;
pkt->dts += (int64_t)nsv->avsync * nsv->framerate.num; |
2f394e1c |
PRINT(("NSV AUDIO: sync:%d, dts:%"PRId64, nsv->avsync, pkt->dts));
}
nst->frame_offset++; |
27d5f18f |
} |
115329f1 |
|
27d5f18f |
nsv->state = NSV_UNSYNC;
return 0;
}
static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
NSVContext *nsv = s->priv_data;
int i, err = 0;
PRINT(("%s()\n", __FUNCTION__)); |
115329f1 |
|
27d5f18f |
/* in case we don't already have something to eat ... */
if (nsv->ahead[0].data == NULL && nsv->ahead[1].data == NULL)
err = nsv_read_chunk(s, 0);
if (err < 0)
return err; |
115329f1 |
|
27d5f18f |
/* now pick one of the plates */
for (i = 0; i < 2; i++) {
if (nsv->ahead[i].data) { |
bb270c08 |
PRINT(("%s: using cached packet[%d]\n", __FUNCTION__, i)); |
27d5f18f |
/* avoid the cost of new_packet + memcpy(->data) */
memcpy(pkt, &nsv->ahead[i], sizeof(AVPacket));
nsv->ahead[i].data = NULL; /* we ate that one */
return pkt->size;
}
} |
115329f1 |
|
27d5f18f |
/* this restaurant is not approvisionned :^] */
return -1;
}
static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
{ |
88730be6 |
#if 0 |
27d5f18f |
NSVContext *avi = s->priv_data;
AVStream *st;
NSVStream *ast;
int frame_number, i;
int64_t pos; |
88730be6 |
#endif |
27d5f18f |
return -1;
}
static int nsv_read_close(AVFormatContext *s)
{ |
88730be6 |
/* int i; */ |
27d5f18f |
NSVContext *nsv = s->priv_data;
if (nsv->index_entries)
av_free(nsv->nsvf_index_data);
#if 0
for(i=0;i<s->nb_streams;i++) {
AVStream *st = s->streams[i];
NSVStream *ast = st->priv_data;
if(ast){
av_free(ast->index_entries);
av_free(ast);
} |
01f4895c |
av_free(st->codec->palctrl); |
27d5f18f |
}
#endif
return 0;
}
static int nsv_probe(AVProbeData *p)
{
int i; |
61f4aa96 |
// PRINT(("nsv_probe(), buf_size %d\n", p->buf_size)); |
27d5f18f |
/* check file header */
/* streamed files might not have any header */
if (p->buf[0] == 'N' && p->buf[1] == 'S' && |
65a00bd6 |
p->buf[2] == 'V' && (p->buf[3] == 'f' || p->buf[3] == 's')) |
27d5f18f |
return AVPROBE_SCORE_MAX;
/* XXX: do streamed files always start at chunk boundary ?? */
/* or do we need to search NSVs in the byte stream ? */
/* seems the servers don't bother starting clean chunks... */
/* sometimes even the first header is at 9KB or something :^) */
for (i = 1; i < p->buf_size - 3; i++) {
if (p->buf[i+0] == 'N' && p->buf[i+1] == 'S' &&
p->buf[i+2] == 'V' && p->buf[i+3] == 's')
return AVPROBE_SCORE_MAX-20;
}
/* so we'll have more luck on extension... */
if (match_ext(p->filename, "nsv")) |
ac5565d8 |
return AVPROBE_SCORE_MAX/2; |
27d5f18f |
/* FIXME: add mime-type check */
return 0;
}
|
ff70e601 |
AVInputFormat nsv_demuxer = { |
27d5f18f |
"nsv", |
517ac243 |
NULL_IF_CONFIG_SMALL("Nullsoft Streaming Video"), |
27d5f18f |
sizeof(NSVContext),
nsv_probe,
nsv_read_header,
nsv_read_packet,
nsv_read_close,
nsv_read_seek,
}; |