* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
+#include <strings.h>
+#include "libavutil/avstring.h"
+#include "libavutil/bswap.h"
+#include "libavutil/tree.h"
#include "nut.h"
#undef NDEBUG
#include <assert.h>
-static uint64_t get_v(ByteIOContext *bc/*, maxstuffing*/){
- uint64_t val = 0;
-
- for(;;)
- {
- int tmp = get_byte(bc);
-
-// if(tmp=0x80){
-// if(!maxstuffing-- || val)
-// return -1;
-// }
-
- if (tmp&0x80)
- val= (val<<7) + tmp - 0x80;
- else{
- return (val<<7) + tmp;
- }
- }
- return -1;
-}
-
static int get_str(ByteIOContext *bc, char *string, unsigned int maxlen){
- unsigned int len= get_v(bc);
+ unsigned int len= ff_get_v(bc);
if(len && maxlen)
get_buffer(bc, string, FFMIN(len, maxlen));
}
static int64_t get_s(ByteIOContext *bc){
- int64_t v = get_v(bc) + 1;
+ int64_t v = ff_get_v(bc) + 1;
if (v&1) return -(v>>1);
else return (v>>1);
}
static uint64_t get_fourcc(ByteIOContext *bc){
- unsigned int len= get_v(bc);
+ unsigned int len= ff_get_v(bc);
if (len==2) return get_le16(bc);
else if(len==4) return get_le32(bc);
#ifdef TRACE
static inline uint64_t get_v_trace(ByteIOContext *bc, char *file, char *func, int line){
- uint64_t v= get_v(bc);
+ uint64_t v= ff_get_v(bc);
- printf("get_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
+ av_log(NULL, AV_LOG_DEBUG, "get_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
return v;
}
static inline int64_t get_s_trace(ByteIOContext *bc, char *file, char *func, int line){
int64_t v= get_s(bc);
- printf("get_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
+ av_log(NULL, AV_LOG_DEBUG, "get_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
return v;
}
static inline uint64_t get_vb_trace(ByteIOContext *bc, char *file, char *func, int line){
uint64_t v= get_vb(bc);
- printf("get_vb %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
+ av_log(NULL, AV_LOG_DEBUG, "get_vb %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
return v;
}
-#define get_v(bc) get_v_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
+#define ff_get_v(bc) get_v_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define get_s(bc) get_s_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define get_vb(bc) get_vb_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#endif
-static int get_packetheader(NUTContext *nut, ByteIOContext *bc, int calculate_checksum)
+static int get_packetheader(NUTContext *nut, ByteIOContext *bc, int calculate_checksum, uint64_t startcode)
{
- int64_t start, size;
+ int64_t size;
// start= url_ftell(bc) - 8;
- size= get_v(bc);
+ startcode= be2me_64(startcode);
+ startcode= ff_crc04C11DB7_update(0, &startcode, 8);
- init_checksum(bc, calculate_checksum ? av_crc04C11DB7_update : NULL, 0);
+ init_checksum(bc, ff_crc04C11DB7_update, startcode);
+ size= ff_get_v(bc);
+ if(size > 4096)
+ get_be32(bc);
+ if(get_checksum(bc) && size > 4096)
+ return -1;
-// nut->packet_start[2] = start;
-// nut->written_packet_size= size;
+ init_checksum(bc, calculate_checksum ? ff_crc04C11DB7_update : NULL, 0);
return size;
}
uint64_t state=0;
if(pos >= 0)
- url_fseek(bc, pos, SEEK_SET); //note, this may fail if the stream isnt seekable, but that shouldnt matter, as in this case we simply start where we are currently
+ url_fseek(bc, pos, SEEK_SET); //note, this may fail if the stream is not seekable, but that should not matter, as in this case we simply start where we currently are
while(!url_feof(bc)){
state= (state<<8) | get_byte(bc);
}
/**
- * find the given startcode.
+ * Find the given startcode.
* @param code the startcode
* @param pos the start position of the search, or -1 if the current position
* @returns the position of the startcode or -1 if not found
}
}
-static int64_t lsb2full(StreamContext *stream, int64_t lsb){
- int64_t mask = (1<<stream->msb_pts_shift)-1;
- int64_t delta= stream->last_pts - mask/2;
- return ((lsb - delta)&mask) + delta;
-}
-
static int nut_probe(AVProbeData *p){
int i;
uint64_t code= 0;
}
#define GET_V(dst, check) \
- tmp= get_v(bc);\
+ tmp= ff_get_v(bc);\
if(!(check)){\
av_log(s, AV_LOG_ERROR, "Error " #dst " is (%"PRId64")\n", tmp);\
return -1;\
static int skip_reserved(ByteIOContext *bc, int64_t pos){
pos -= url_ftell(bc);
-av_log(NULL, AV_LOG_ERROR, "skip %d\n", (int)pos);
if(pos<0){
url_fseek(bc, pos, SEEK_CUR);
return -1;
static int decode_main_header(NUTContext *nut){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
uint64_t tmp, end;
unsigned int stream_count;
- int i, j, tmp_stream, tmp_mul, tmp_pts, tmp_size, count, tmp_res;
+ int i, j, tmp_stream, tmp_mul, tmp_pts, tmp_size, count, tmp_res, tmp_head_idx;
+ int64_t tmp_match;
- end= get_packetheader(nut, bc, 1);
+ end= get_packetheader(nut, bc, 1, MAIN_STARTCODE);
end += url_ftell(bc);
GET_V(tmp , tmp >=2 && tmp <= 3)
GET_V(stream_count , tmp > 0 && tmp <=MAX_STREAMS)
- nut->max_distance = get_v(bc);
+ nut->max_distance = ff_get_v(bc);
if(nut->max_distance > 65536){
av_log(s, AV_LOG_DEBUG, "max_distance %d\n", nut->max_distance);
nut->max_distance= 65536;
for(i=0; i<nut->time_base_count; i++){
GET_V(nut->time_base[i].num, tmp>0 && tmp<(1ULL<<31))
GET_V(nut->time_base[i].den, tmp>0 && tmp<(1ULL<<31))
- if(ff_gcd(nut->time_base[i].num, nut->time_base[i].den) != 1){
+ if(av_gcd(nut->time_base[i].num, nut->time_base[i].den) != 1){
av_log(s, AV_LOG_ERROR, "time base invalid\n");
return -1;
}
tmp_pts=0;
tmp_mul=1;
tmp_stream=0;
+ tmp_match= 1-(1LL<<62);
+ tmp_head_idx= 0;
for(i=0; i<256;){
- int tmp_flags = get_v(bc);
- int tmp_fields= get_v(bc);
+ int tmp_flags = ff_get_v(bc);
+ int tmp_fields= ff_get_v(bc);
if(tmp_fields>0) tmp_pts = get_s(bc);
- if(tmp_fields>1) tmp_mul = get_v(bc);
- if(tmp_fields>2) tmp_stream= get_v(bc);
- if(tmp_fields>3) tmp_size = get_v(bc);
+ if(tmp_fields>1) tmp_mul = ff_get_v(bc);
+ if(tmp_fields>2) tmp_stream= ff_get_v(bc);
+ if(tmp_fields>3) tmp_size = ff_get_v(bc);
else tmp_size = 0;
- if(tmp_fields>4) tmp_res = get_v(bc);
+ if(tmp_fields>4) tmp_res = ff_get_v(bc);
else tmp_res = 0;
- if(tmp_fields>5) count = get_v(bc);
+ if(tmp_fields>5) count = ff_get_v(bc);
else count = tmp_mul - tmp_size;
+ if(tmp_fields>6) tmp_match = get_s(bc);
+ if(tmp_fields>7) tmp_head_idx= ff_get_v(bc);
- while(tmp_fields-- > 6)
- get_v(bc);
+ while(tmp_fields-- > 8)
+ ff_get_v(bc);
if(count == 0 || i+count > 256){
av_log(s, AV_LOG_ERROR, "illegal count %d at %d\n", count, i);
nut->frame_code[i].size_mul = tmp_mul ;
nut->frame_code[i].size_lsb = tmp_size+j;
nut->frame_code[i].reserved_count = tmp_res ;
+ nut->frame_code[i].header_idx = tmp_head_idx;
}
}
assert(nut->frame_code['N'].flags == FLAG_INVALID);
+ if(end > url_ftell(bc) + 4){
+ int rem= 1024;
+ GET_V(nut->header_count, tmp<128U)
+ nut->header_count++;
+ for(i=1; i<nut->header_count; i++){
+ GET_V(nut->header_len[i], tmp>0 && tmp<256);
+ rem -= nut->header_len[i];
+ if(rem < 0){
+ av_log(s, AV_LOG_ERROR, "invalid elision header\n");
+ return -1;
+ }
+ nut->header[i]= av_malloc(nut->header_len[i]);
+ get_buffer(bc, nut->header[i], nut->header_len[i]);
+ }
+ assert(nut->header_len[0]==0);
+ }
+
if(skip_reserved(bc, end) || get_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Main header checksum mismatch\n");
+ av_log(s, AV_LOG_ERROR, "main header checksum mismatch\n");
return -1;
}
static int decode_stream_header(NUTContext *nut){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
StreamContext *stc;
- int class, nom, denom, stream_id;
+ int class, stream_id;
uint64_t tmp, end;
AVStream *st;
- end= get_packetheader(nut, bc, 1);
+ end= get_packetheader(nut, bc, 1, STREAM_STARTCODE);
end += url_ftell(bc);
- GET_V(stream_id, tmp < s->nb_streams && !nut->stream[tmp].time_base.num);
+ GET_V(stream_id, tmp < s->nb_streams && !nut->stream[tmp].time_base);
stc= &nut->stream[stream_id];
st = s->streams[stream_id];
if (!st)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
- class = get_v(bc);
+ class = ff_get_v(bc);
tmp = get_fourcc(bc);
st->codec->codec_tag= tmp;
switch(class)
{
case 0:
st->codec->codec_type = CODEC_TYPE_VIDEO;
- st->codec->codec_id = codec_get_bmp_id(tmp);
- if (st->codec->codec_id == CODEC_ID_NONE)
- av_log(s, AV_LOG_ERROR, "Unknown codec?!\n");
+ st->codec->codec_id = codec_get_id(codec_bmp_tags, tmp);
break;
case 1:
st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = codec_get_wav_id(tmp);
- if (st->codec->codec_id == CODEC_ID_NONE)
- av_log(s, AV_LOG_ERROR, "Unknown codec?!\n");
+ st->codec->codec_id = codec_get_id(codec_wav_tags, tmp);
break;
case 2:
-// st->codec->codec_type = CODEC_TYPE_TEXT;
-// break;
+ st->codec->codec_type = CODEC_TYPE_SUBTITLE;
+ st->codec->codec_id = codec_get_id(ff_nut_subtitle_tags, tmp);
+ break;
case 3:
st->codec->codec_type = CODEC_TYPE_DATA;
break;
default:
- av_log(s, AV_LOG_ERROR, "Unknown stream class (%d)\n", class);
+ av_log(s, AV_LOG_ERROR, "unknown stream class (%d)\n", class);
return -1;
}
+ if(class<3 && st->codec->codec_id == CODEC_ID_NONE)
+ av_log(s, AV_LOG_ERROR, "Unknown codec?!\n");
+
GET_V(stc->time_base_id , tmp < nut->time_base_count);
GET_V(stc->msb_pts_shift , tmp < 16);
- stc->max_pts_distance= get_v(bc);
- GET_V(stc->decode_delay , tmp < 1000); //sanity limit, raise this if moors law is true
+ stc->max_pts_distance= ff_get_v(bc);
+ GET_V(stc->decode_delay , tmp < 1000); //sanity limit, raise this if Moore's law is true
st->codec->has_b_frames= stc->decode_delay;
- get_v(bc); //stream flags
+ ff_get_v(bc); //stream flags
GET_V(st->codec->extradata_size, tmp < (1<<30));
if(st->codec->extradata_size){
if (st->codec->codec_type == CODEC_TYPE_VIDEO){
GET_V(st->codec->width , tmp > 0)
GET_V(st->codec->height, tmp > 0)
- st->codec->sample_aspect_ratio.num= get_v(bc);
- st->codec->sample_aspect_ratio.den= get_v(bc);
- if((!st->codec->sample_aspect_ratio.num) != (!st->codec->sample_aspect_ratio.den)){
- av_log(s, AV_LOG_ERROR, "invalid aspect ratio\n");
+ st->sample_aspect_ratio.num= ff_get_v(bc);
+ st->sample_aspect_ratio.den= ff_get_v(bc);
+ if((!st->sample_aspect_ratio.num) != (!st->sample_aspect_ratio.den)){
+ av_log(s, AV_LOG_ERROR, "invalid aspect ratio %d/%d\n", st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
return -1;
}
- get_v(bc); /* csp type */
+ ff_get_v(bc); /* csp type */
}else if (st->codec->codec_type == CODEC_TYPE_AUDIO){
GET_V(st->codec->sample_rate , tmp > 0)
- tmp= get_v(bc); // samplerate_den
- if(tmp > st->codec->sample_rate){
- av_log(s, AV_LOG_ERROR, "bleh, libnut muxed this ;)\n");
- st->codec->sample_rate= tmp;
- }
+ ff_get_v(bc); // samplerate_den
GET_V(st->codec->channels, tmp > 0)
}
if(skip_reserved(bc, end) || get_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Stream header %d checksum mismatch\n", stream_id);
+ av_log(s, AV_LOG_ERROR, "stream header %d checksum mismatch\n", stream_id);
return -1;
}
- stc->time_base= nut->time_base[stc->time_base_id];
- av_set_pts_info(s->streams[stream_id], 63, stc->time_base.num, stc->time_base.den);
+ stc->time_base= &nut->time_base[stc->time_base_id];
+ av_set_pts_info(s->streams[stream_id], 63, stc->time_base->num, stc->time_base->den);
return 0;
}
+static void set_disposition_bits(AVFormatContext* avf, char* value, int stream_id){
+ int flag = 0, i;
+ for (i=0; ff_nut_dispositions[i].flag; ++i) {
+ if (!strcmp(ff_nut_dispositions[i].str, value))
+ flag = ff_nut_dispositions[i].flag;
+ }
+ if (!flag)
+ av_log(avf, AV_LOG_INFO, "unknown disposition type '%s'\n", value);
+ for (i = 0; i < avf->nb_streams; ++i)
+ if (stream_id == i || stream_id == -1)
+ avf->streams[i]->disposition |= flag;
+}
+
static int decode_info_header(NUTContext *nut){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
uint64_t tmp;
unsigned int stream_id_plus1, chapter_start, chapter_len, count;
int chapter_id, i;
int64_t value, end;
- char name[256], str_value[1024], type_str[256], *type= type_str;
+ char name[256], str_value[1024], type_str[256];
+ const char *type;
+ AVChapter *chapter= NULL;
+ AVStream *st= NULL;
- end= get_packetheader(nut, bc, 1);
+ end= get_packetheader(nut, bc, 1, INFO_STARTCODE);
end += url_ftell(bc);
GET_V(stream_id_plus1, tmp <= s->nb_streams)
chapter_id = get_s(bc);
- chapter_start= get_v(bc);
- chapter_len = get_v(bc);
- count = get_v(bc);
+ chapter_start= ff_get_v(bc);
+ chapter_len = ff_get_v(bc);
+ count = ff_get_v(bc);
+
+ if(chapter_id && !stream_id_plus1){
+ int64_t start= chapter_start / nut->time_base_count;
+ chapter= ff_new_chapter(s, chapter_id,
+ nut->time_base[chapter_start % nut->time_base_count],
+ start, start + chapter_len, NULL);
+ } else if(stream_id_plus1)
+ st= s->streams[stream_id_plus1 - 1];
+
for(i=0; i<count; i++){
get_str(bc, name, sizeof(name));
value= get_s(bc);
type= "UTF-8";
get_str(bc, str_value, sizeof(str_value));
}else if(value == -2){
- get_str(bc, type, sizeof(type));
+ get_str(bc, type_str, sizeof(type_str));
+ type= type_str;
get_str(bc, str_value, sizeof(str_value));
}else if(value == -3){
type= "s";
value= get_s(bc);
}else if(value == -4){
type= "t";
- value= get_v(bc);
+ value= ff_get_v(bc);
}else if(value < -4){
type= "r";
get_s(bc);
type= "v";
}
- if(chapter_id==0 && !strcmp(type, "UTF-8")){
- if (!strcmp(name, "Author"))
- pstrcpy(s->author , sizeof(s->author) , str_value);
- else if(!strcmp(name, "Title"))
- pstrcpy(s->title , sizeof(s->title) , str_value);
- else if(!strcmp(name, "Copyright"))
- pstrcpy(s->copyright, sizeof(s->copyright), str_value);
- else if(!strcmp(name, "Description"))
- pstrcpy(s->comment , sizeof(s->comment) , str_value);
+ if (stream_id_plus1 > s->nb_streams) {
+ av_log(s, AV_LOG_ERROR, "invalid stream id for info packet\n");
+ continue;
+ }
+
+ if(!strcmp(type, "UTF-8")){
+ AVMetadata **metadata = NULL;
+ if(chapter_id==0 && !strcmp(name, "Disposition"))
+ set_disposition_bits(s, str_value, stream_id_plus1 - 1);
+ else if(chapter) metadata= &chapter->metadata;
+ else if(stream_id_plus1) metadata= &st->metadata;
+ else metadata= &s->metadata;
+ if(metadata && strcasecmp(name,"Uses")
+ && strcasecmp(name,"Depends") && strcasecmp(name,"Replaces"))
+ av_metadata_set(metadata, name, str_value);
}
}
if(skip_reserved(bc, end) || get_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Info header checksum mismatch\n");
+ av_log(s, AV_LOG_ERROR, "info header checksum mismatch\n");
return -1;
}
return 0;
}
-static int decode_syncpoint(NUTContext *nut){
+static int decode_syncpoint(NUTContext *nut, int64_t *ts, int64_t *back_ptr){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
- int64_t end;
- uint64_t tmp;
- int i;
- AVRational time_base;
+ ByteIOContext *bc = s->pb;
+ int64_t end, tmp;
nut->last_syncpoint_pos= url_ftell(bc)-8;
- end= get_packetheader(nut, bc, 1);
+ end= get_packetheader(nut, bc, 1, SYNCPOINT_STARTCODE);
end += url_ftell(bc);
- tmp= get_v(bc);
- get_v(bc); //back_ptr_div16
+ tmp= ff_get_v(bc);
+ *back_ptr= nut->last_syncpoint_pos - 16*ff_get_v(bc);
+ if(*back_ptr < 0)
+ return -1;
- time_base= nut->time_base[tmp % nut->time_base_count];
- for(i=0; i<s->nb_streams; i++){
- nut->stream[i].last_pts= av_rescale_rnd(
- tmp / nut->time_base_count,
- time_base.num * (int64_t)nut->stream[i].time_base.den,
- time_base.den * (int64_t)nut->stream[i].time_base.num,
- AV_ROUND_DOWN);
- //last_key_frame ?
- }
- //FIXME put this in a reset func maybe
+ ff_nut_reset_ts(nut, nut->time_base[tmp % nut->time_base_count], tmp / nut->time_base_count);
if(skip_reserved(bc, end) || get_checksum(bc)){
av_log(s, AV_LOG_ERROR, "sync point checksum mismatch\n");
return -1;
}
+
+ *ts= tmp / s->nb_streams * av_q2d(nut->time_base[tmp % s->nb_streams])*AV_TIME_BASE;
+ ff_nut_add_sp(nut, nut->last_syncpoint_pos, *back_ptr, *ts);
+
return 0;
}
static int find_and_decode_index(NUTContext *nut){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
uint64_t tmp, end;
int i, j, syncpoint_count;
int64_t filesize= url_fsize(bc);
int64_t *syncpoints;
int8_t *has_keyframe;
+ int ret= -1;
url_fseek(bc, filesize-12, SEEK_SET);
url_fseek(bc, filesize-get_be64(bc), SEEK_SET);
return -1;
}
- end= get_packetheader(nut, bc, 1);
+ end= get_packetheader(nut, bc, 1, INDEX_STARTCODE);
end += url_ftell(bc);
- get_v(bc); //max_pts
+ ff_get_v(bc); //max_pts
GET_V(syncpoint_count, tmp < INT_MAX/8 && tmp > 0)
syncpoints= av_malloc(sizeof(int64_t)*syncpoint_count);
has_keyframe= av_malloc(sizeof(int8_t)*(syncpoint_count+1));
for(i=0; i<syncpoint_count; i++){
- GET_V(syncpoints[i], tmp>0)
+ syncpoints[i] = ff_get_v(bc);
+ if(syncpoints[i] <= 0)
+ goto fail;
if(i)
syncpoints[i] += syncpoints[i-1];
}
for(i=0; i<s->nb_streams; i++){
int64_t last_pts= -1;
for(j=0; j<syncpoint_count;){
- uint64_t x= get_v(bc);
+ uint64_t x= ff_get_v(bc);
int type= x&1;
int n= j;
x>>=1;
x>>=1;
if(n+x >= syncpoint_count + 1){
av_log(s, AV_LOG_ERROR, "index overflow A\n");
- return -1;
+ goto fail;
}
while(x--)
has_keyframe[n++]= flag;
while(x != 1){
if(n>=syncpoint_count + 1){
av_log(s, AV_LOG_ERROR, "index overflow B\n");
- return -1;
+ goto fail;
}
has_keyframe[n++]= x&1;
x>>=1;
}
if(has_keyframe[0]){
av_log(s, AV_LOG_ERROR, "keyframe before first syncpoint in index\n");
- return -1;
+ goto fail;
}
assert(n<=syncpoint_count+1);
- for(; j<n; j++){
+ for(; j<n && j<syncpoint_count; j++){
if(has_keyframe[j]){
- uint64_t B, A= get_v(bc);
+ uint64_t B, A= ff_get_v(bc);
if(!A){
- A= get_v(bc);
- B= get_v(bc);
+ A= ff_get_v(bc);
+ B= ff_get_v(bc);
//eor_pts[j][i] = last_pts + A + B
}else
B= 0;
}
if(skip_reserved(bc, end) || get_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Index checksum mismatch\n");
- return -1;
- }
- return 0;
+ av_log(s, AV_LOG_ERROR, "index checksum mismatch\n");
+ goto fail;
+ }
+ ret= 0;
+fail:
+ av_free(syncpoints);
+ av_free(has_keyframe);
+ return ret;
}
static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
int64_t pos;
- int inited_stream_count;
+ int initialized_stream_count;
nut->avf= s;
do{
pos= find_startcode(bc, MAIN_STARTCODE, pos)+1;
if (pos<0+1){
- av_log(s, AV_LOG_ERROR, "no main startcode found\n");
+ av_log(s, AV_LOG_ERROR, "No main startcode found.\n");
return -1;
}
}while(decode_main_header(nut) < 0);
/* stream headers */
pos=0;
- for(inited_stream_count=0; inited_stream_count < s->nb_streams;){
+ for(initialized_stream_count=0; initialized_stream_count < s->nb_streams;){
pos= find_startcode(bc, STREAM_STARTCODE, pos)+1;
if (pos<0+1){
- av_log(s, AV_LOG_ERROR, "not all stream headers found\n");
+ av_log(s, AV_LOG_ERROR, "Not all stream headers found.\n");
return -1;
}
if(decode_stream_header(nut) >= 0)
- inited_stream_count++;
+ initialized_stream_count++;
}
/* info headers */
s->data_offset= pos-8;
- if(0 &&!url_is_streamed(bc)){
+ if(!url_is_streamed(bc)){
int64_t orig_pos= url_ftell(bc);
find_and_decode_index(nut);
url_fseek(bc, orig_pos, SEEK_SET);
return 0;
}
-static int decode_frame_header(NUTContext *nut, int *flags_ret, int64_t *pts, int *stream_id, int frame_code){
+static int decode_frame_header(NUTContext *nut, int64_t *pts, int *stream_id, uint8_t *header_idx, int frame_code){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
StreamContext *stc;
int size, flags, size_mul, pts_delta, i, reserved_count;
uint64_t tmp;
if(url_ftell(bc) > nut->last_syncpoint_pos + nut->max_distance){
- av_log(s, AV_LOG_ERROR, "last frame must have been damaged %Ld > %Ld + %d\n", url_ftell(bc), nut->last_syncpoint_pos, nut->max_distance);
+ av_log(s, AV_LOG_ERROR, "Last frame must have been damaged %"PRId64" > %"PRId64" + %d\n", url_ftell(bc), nut->last_syncpoint_pos, nut->max_distance);
return -1;
}
*stream_id = nut->frame_code[frame_code].stream_id;
pts_delta = nut->frame_code[frame_code].pts_delta;
reserved_count = nut->frame_code[frame_code].reserved_count;
+ *header_idx = nut->frame_code[frame_code].header_idx;
if(flags & FLAG_INVALID)
return -1;
if(flags & FLAG_CODED)
- flags ^= get_v(bc);
+ flags ^= ff_get_v(bc);
if(flags & FLAG_STREAM_ID){
GET_V(*stream_id, tmp < s->nb_streams)
}
stc= &nut->stream[*stream_id];
if(flags&FLAG_CODED_PTS){
- int coded_pts= get_v(bc);
+ int coded_pts= ff_get_v(bc);
//FIXME check last_pts validity?
if(coded_pts < (1<<stc->msb_pts_shift)){
- *pts=lsb2full(stc, coded_pts);
+ *pts=ff_lsb2full(stc, coded_pts);
}else
*pts=coded_pts - (1<<stc->msb_pts_shift);
}else
*pts= stc->last_pts + pts_delta;
if(flags&FLAG_SIZE_MSB){
- size += size_mul*get_v(bc);
+ size += size_mul*ff_get_v(bc);
}
+ if(flags&FLAG_MATCH_TIME)
+ get_s(bc);
+ if(flags&FLAG_HEADER_IDX)
+ *header_idx= ff_get_v(bc);
if(flags&FLAG_RESERVED)
- reserved_count= get_v(bc);
+ reserved_count= ff_get_v(bc);
for(i=0; i<reserved_count; i++)
- get_v(bc);
+ ff_get_v(bc);
+
+ if(*header_idx >= (unsigned)nut->header_count){
+ av_log(s, AV_LOG_ERROR, "header_idx invalid\n");
+ return -1;
+ }
+ if(size > 4096)
+ *header_idx=0;
+ size -= nut->header_len[*header_idx];
+
if(flags&FLAG_CHECKSUM){
get_be32(bc); //FIXME check this
+ }else if(size > 2*nut->max_distance || FFABS(stc->last_pts - *pts) > stc->max_pts_distance){
+ av_log(s, AV_LOG_ERROR, "frame size > 2max_distance and no checksum\n");
+ return -1;
}
- *flags_ret= flags;
stc->last_pts= *pts;
- stc->last_key_frame= flags&FLAG_KEY; //FIXME change to last flags
-
- if(flags&FLAG_KEY){
- av_add_index_entry(
- s->streams[*stream_id],
- nut->last_syncpoint_pos,
- *pts,
- 0,
- 0,
- AVINDEX_KEYFRAME);
- }
+ stc->last_flags= flags;
return size;
}
static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){
AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
- int size, stream_id, flags, discard;
+ ByteIOContext *bc = s->pb;
+ int size, stream_id, discard;
int64_t pts, last_IP_pts;
+ StreamContext *stc;
+ uint8_t header_idx;
- size= decode_frame_header(nut, &flags, &pts, &stream_id, frame_code);
+ size= decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
if(size < 0)
return -1;
+ stc= &nut->stream[stream_id];
+
+ if (stc->last_flags & FLAG_KEY)
+ stc->skip_until_key_frame=0;
+
discard= s->streams[ stream_id ]->discard;
last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
- if( (discard >= AVDISCARD_NONKEY && !(flags & FLAG_KEY))
+ if( (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
- || discard >= AVDISCARD_ALL){
+ || discard >= AVDISCARD_ALL
+ || stc->skip_until_key_frame){
url_fskip(bc, size);
return 1;
}
- av_get_packet(bc, pkt, size);
+ av_new_packet(pkt, size + nut->header_len[header_idx]);
+ memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
+ pkt->pos= url_ftell(bc); //FIXME
+ get_buffer(bc, pkt->data + nut->header_len[header_idx], size);
+
pkt->stream_index = stream_id;
- if (flags & FLAG_KEY)
+ if (stc->last_flags & FLAG_KEY)
pkt->flags |= PKT_FLAG_KEY;
pkt->pts = pts;
static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
{
NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
+ ByteIOContext *bc = s->pb;
int i, frame_code=0, ret, skip;
+ int64_t ts, back_ptr;
for(;;){
int64_t pos= url_ftell(bc);
uint64_t tmp= nut->next_startcode;
nut->next_startcode=0;
- if (url_feof(bc))
- return -1;
-
if(tmp){
pos-=8;
}else{
frame_code = get_byte(bc);
+ if(url_feof(bc))
+ return -1;
if(frame_code == 'N'){
tmp= frame_code;
for(i=1; i<8; i++)
case MAIN_STARTCODE:
case STREAM_STARTCODE:
case INDEX_STARTCODE:
- skip= get_packetheader(nut, bc, 0);
+ skip= get_packetheader(nut, bc, 0, tmp);
url_fseek(bc, skip, SEEK_CUR);
break;
case INFO_STARTCODE:
goto resync;
break;
case SYNCPOINT_STARTCODE:
- if(decode_syncpoint(nut)<0)
+ if(decode_syncpoint(nut, &ts, &back_ptr)<0)
goto resync;
frame_code = get_byte(bc);
case 0:
default:
resync:
av_log(s, AV_LOG_DEBUG, "syncing from %"PRId64"\n", pos);
- tmp= find_any_startcode(bc, pos+1);
+ tmp= find_any_startcode(bc, nut->last_syncpoint_pos+1);
if(tmp==0)
return -1;
av_log(s, AV_LOG_DEBUG, "sync\n");
static int64_t nut_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos_arg, int64_t pos_limit){
NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- int64_t pos, pts;
- int frame_code, stream_id,size, flags;
+ ByteIOContext *bc = s->pb;
+ int64_t pos, pts, back_ptr;
av_log(s, AV_LOG_DEBUG, "read_timestamp(X,%d,%"PRId64",%"PRId64")\n", stream_index, *pos_arg, pos_limit);
pos= *pos_arg;
-resync:
do{
pos= find_startcode(bc, SYNCPOINT_STARTCODE, pos)+1;
if(pos < 1){
assert(nut->next_startcode == 0);
- av_log(s, AV_LOG_ERROR, "read_timestamp failed\n");
+ av_log(s, AV_LOG_ERROR, "read_timestamp failed.\n");
return AV_NOPTS_VALUE;
}
- }while(decode_syncpoint(nut) < 0);
+ }while(decode_syncpoint(nut, &pts, &back_ptr) < 0);
*pos_arg = pos-1;
assert(nut->last_syncpoint_pos == *pos_arg);
- do{
- frame_code= get_byte(bc);
- if(frame_code == 'N'){
- pos= url_ftell(bc)-1;
- goto resync;
- }
- //FIXME consider pos_limit and eof
- size= decode_frame_header(nut, &flags, &pts, &stream_id, frame_code);
+ av_log(s, AV_LOG_DEBUG, "return %"PRId64" %"PRId64"\n", pts,back_ptr );
+ if (stream_index == -1) return pts;
+ else if(stream_index == -2) return back_ptr;
+
+assert(0);
+}
+
+static int read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags){
+ NUTContext *nut = s->priv_data;
+ AVStream *st= s->streams[stream_index];
+ Syncpoint dummy={.ts= pts*av_q2d(st->time_base)*AV_TIME_BASE};
+ Syncpoint nopts_sp= {.ts= AV_NOPTS_VALUE, .back_ptr= AV_NOPTS_VALUE};
+ Syncpoint *sp, *next_node[2]= {&nopts_sp, &nopts_sp};
+ int64_t pos, pos2, ts;
+ int i;
+
+ if(st->index_entries){
+ int index= av_index_search_timestamp(st, pts, flags);
+ if(index<0)
+ return -1;
- if(size < 0)
- goto resync;
+ pos2= st->index_entries[index].pos;
+ ts = st->index_entries[index].timestamp;
+ }else{
+ av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pts_cmp, next_node);
+ av_log(s, AV_LOG_DEBUG, "%"PRIu64"-%"PRIu64" %"PRId64"-%"PRId64"\n", next_node[0]->pos, next_node[1]->pos,
+ next_node[0]->ts , next_node[1]->ts);
+ pos= av_gen_search(s, -1, dummy.ts, next_node[0]->pos, next_node[1]->pos, next_node[1]->pos,
+ next_node[0]->ts , next_node[1]->ts, AVSEEK_FLAG_BACKWARD, &ts, nut_read_timestamp);
+
+ if(!(flags & AVSEEK_FLAG_BACKWARD)){
+ dummy.pos= pos+16;
+ next_node[1]= &nopts_sp;
+ av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, next_node);
+ pos2= av_gen_search(s, -2, dummy.pos, next_node[0]->pos , next_node[1]->pos, next_node[1]->pos,
+ next_node[0]->back_ptr, next_node[1]->back_ptr, flags, &ts, nut_read_timestamp);
+ if(pos2>=0)
+ pos= pos2;
+ //FIXME dir but I think it does not matter
+ }
+ dummy.pos= pos;
+ sp= av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, NULL);
- url_fseek(bc, size, SEEK_CUR);
- }while(stream_id != stream_index || !(flags & FLAG_KEY));
- assert(nut->next_startcode == 0);
- av_log(s, AV_LOG_DEBUG, "read_timestamp success\n");
+ assert(sp);
+ pos2= sp->back_ptr - 15;
+ }
+ av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos2);
+ pos= find_startcode(s->pb, SYNCPOINT_STARTCODE, pos2);
+ url_fseek(s->pb, pos, SEEK_SET);
+ av_log(NULL, AV_LOG_DEBUG, "SP: %"PRId64"\n", pos);
+ if(pos2 > pos || pos2 + 15 < pos){
+ av_log(NULL, AV_LOG_ERROR, "no syncpoint at backptr pos\n");
+ }
+ for(i=0; i<s->nb_streams; i++)
+ nut->stream[i].skip_until_key_frame=1;
- return pts;
+ return 0;
}
static int nut_read_close(AVFormatContext *s)
return 0;
}
-#ifdef CONFIG_NUT_DEMUXER
+#if CONFIG_NUT_DEMUXER
AVInputFormat nut_demuxer = {
"nut",
- "nut format",
+ NULL_IF_CONFIG_SMALL("NUT format"),
sizeof(NUTContext),
nut_probe,
nut_read_header,
nut_read_packet,
nut_read_close,
- NULL,
- nut_read_timestamp,
+ read_seek,
.extensions = "nut",
};
#endif
projects / frescor / ffmpeg.git / blobdiff