[SCM] libav/experimental: remove old unused nut (de)muxer
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 16:05:10 UTC 2013
The following commit has been merged in the experimental branch:
commit 44f46a698e9cfef5fbc218313314e80ca07d4007
Author: Michael Niedermayer <michaelni at gmx.at>
Date: Thu Aug 9 16:15:50 2007 +0000
remove old unused nut (de)muxer
Originally committed as revision 10018 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavformat/nut.c b/libavformat/nut.c
deleted file mode 100644
index 4a531db..0000000
--- a/libavformat/nut.c
+++ /dev/null
@@ -1,1455 +0,0 @@
-/*
- * "NUT" Container Format muxer and demuxer (DRAFT-200403??)
- * Copyright (c) 2003 Alex Beregszaszi
- * Copyright (c) 2004 Michael Niedermayer
- *
- * Visit the official site at http://www.nut-container.org/.
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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
- * Lesser General Public License for more details.
- *
- * 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
- */
-
-/*
- * TODO:
- * - index writing
- * - index packet reading support
-*/
-
-//#define DEBUG 1
-
-#include <limits.h>
-#include "avformat.h"
-#include "mpegaudio.h"
-#include "riff.h"
-#include "adler32.h"
-
-#undef NDEBUG
-#include <assert.h>
-
-//#define TRACE
-
-//from /dev/random
-
-#define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
-#define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
-#define KEYFRAME_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
-#define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
-#define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
-
-#define ID_STRING "nut/multimedia container\0"
-
-#define MAX_DISTANCE (1024*16-1)
-#define MAX_SHORT_DISTANCE (1024*4-1)
-
-#define FLAG_DATA_SIZE 1
-#define FLAG_KEY_FRAME 2
-#define FLAG_INVALID 4
-
-typedef struct {
- uint8_t flags;
- uint8_t stream_id_plus1;
- uint16_t size_mul;
- uint16_t size_lsb;
- int16_t timestamp_delta;
- uint8_t reserved_count;
-} FrameCode;
-
-typedef struct {
- int last_key_frame;
- int msb_timestamp_shift;
- int rate_num;
- int rate_den;
- int64_t last_pts;
- int64_t last_sync_pos; ///<pos of last 1/2 type frame
- int decode_delay;
-} StreamContext;
-
-typedef struct {
- AVFormatContext *avf;
- int written_packet_size;
- int64_t packet_start[3]; //0-> startcode less, 1-> short startcode 2-> long startcodes
- FrameCode frame_code[256];
- unsigned int stream_count;
- uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable
- StreamContext *stream;
- int max_distance;
- int max_short_distance;
- int rate_num;
- int rate_den;
- int short_startcode;
-} NUTContext;
-
-static char *info_table[][2]={
- {NULL , NULL }, // end
- {NULL , NULL },
- {NULL , "UTF8"},
- {NULL , "v"},
- {NULL , "s"},
- {"StreamId" , "v"},
- {"SegmentId" , "v"},
- {"StartTimestamp" , "v"},
- {"EndTimestamp" , "v"},
- {"Author" , "UTF8"},
- {"Title" , "UTF8"},
- {"Description" , "UTF8"},
- {"Copyright" , "UTF8"},
- {"Encoder" , "UTF8"},
- {"Keyword" , "UTF8"},
- {"Cover" , "JPEG"},
- {"Cover" , "PNG"},
-};
-
-static void update(NUTContext *nut, int stream_index, int64_t frame_start, int frame_type, int frame_code, int key_frame, int size, int64_t pts){
- StreamContext *stream= &nut->stream[stream_index];
-
- stream->last_key_frame= key_frame;
- nut->packet_start[ frame_type ]= frame_start;
- stream->last_pts= pts;
-}
-
-static void reset(AVFormatContext *s, int64_t global_ts){
- NUTContext *nut = s->priv_data;
- int i;
-
- for(i=0; i<s->nb_streams; i++){
- StreamContext *stream= &nut->stream[i];
-
- stream->last_key_frame= 1;
-
- stream->last_pts= av_rescale(global_ts, stream->rate_num*(int64_t)nut->rate_den, stream->rate_den*(int64_t)nut->rate_num);
- }
-}
-
-static void build_frame_code(AVFormatContext *s){
- NUTContext *nut = s->priv_data;
- int key_frame, index, pred, stream_id;
- int start=0;
- int end= 255;
- int keyframe_0_esc= s->nb_streams > 2;
- int pred_table[10];
-
- if(keyframe_0_esc){
- /* keyframe = 0 escape */
- FrameCode *ft= &nut->frame_code[start];
- ft->flags= FLAG_DATA_SIZE;
- ft->stream_id_plus1= 0;
- ft->size_mul=1;
- ft->timestamp_delta=0;
- start++;
- }
-
- for(stream_id= 0; stream_id<s->nb_streams; stream_id++){
- int start2= start + (end-start)*stream_id / s->nb_streams;
- int end2 = start + (end-start)*(stream_id+1) / s->nb_streams;
- AVCodecContext *codec = s->streams[stream_id]->codec;
- int is_audio= codec->codec_type == CODEC_TYPE_AUDIO;
- int intra_only= /*codec->intra_only || */is_audio;
- int pred_count;
-
- for(key_frame=0; key_frame<2; key_frame++){
- if(intra_only && keyframe_0_esc && key_frame==0)
- continue;
-
- {
- FrameCode *ft= &nut->frame_code[start2];
- ft->flags= FLAG_KEY_FRAME*key_frame;
- ft->flags|= FLAG_DATA_SIZE;
- ft->stream_id_plus1= stream_id + 1;
- ft->size_mul=1;
- ft->timestamp_delta=0;
- start2++;
- }
- }
-
- key_frame= intra_only;
-#if 1
- if(is_audio){
- int frame_bytes= codec->frame_size*(int64_t)codec->bit_rate / (8*codec->sample_rate);
- int pts;
- for(pts=0; pts<2; pts++){
- for(pred=0; pred<2; pred++){
- FrameCode *ft= &nut->frame_code[start2];
- ft->flags= FLAG_KEY_FRAME*key_frame;
- ft->stream_id_plus1= stream_id + 1;
- ft->size_mul=frame_bytes + 2;
- ft->size_lsb=frame_bytes + pred;
- ft->timestamp_delta=pts;
- start2++;
- }
- }
- }else{
- FrameCode *ft= &nut->frame_code[start2];
- ft->flags= FLAG_KEY_FRAME | FLAG_DATA_SIZE;
- ft->stream_id_plus1= stream_id + 1;
- ft->size_mul=1;
- ft->timestamp_delta=1;
- start2++;
- }
-#endif
-
- if(codec->has_b_frames){
- pred_count=5;
- pred_table[0]=-2;
- pred_table[1]=-1;
- pred_table[2]=1;
- pred_table[3]=3;
- pred_table[4]=4;
- }else if(codec->codec_id == CODEC_ID_VORBIS){
- pred_count=3;
- pred_table[0]=2;
- pred_table[1]=9;
- pred_table[2]=16;
- }else{
- pred_count=1;
- pred_table[0]=1;
- }
-
- for(pred=0; pred<pred_count; pred++){
- int start3= start2 + (end2-start2)*pred / pred_count;
- int end3 = start2 + (end2-start2)*(pred+1) / pred_count;
-
- for(index=start3; index<end3; index++){
- FrameCode *ft= &nut->frame_code[index];
- ft->flags= FLAG_KEY_FRAME*key_frame;
- ft->flags|= FLAG_DATA_SIZE;
- ft->stream_id_plus1= stream_id + 1;
-//FIXME use single byte size and pred from last
- ft->size_mul= end3-start3;
- ft->size_lsb= index - start3;
- ft->timestamp_delta= pred_table[pred];
- }
- }
- }
- memmove(&nut->frame_code['N'+1], &nut->frame_code['N'], sizeof(FrameCode)*(255-'N'));
- nut->frame_code['N'].flags= FLAG_INVALID;
-}
-
-static uint64_t get_v(ByteIOContext *bc)
-{
- uint64_t val = 0;
-
- for(;;)
- {
- int tmp = get_byte(bc);
-
- if (tmp&0x80)
- val= (val<<7) + tmp - 0x80;
- else{
-//av_log(NULL, AV_LOG_DEBUG, "get_v()= %"PRId64"\n", (val<<7) + tmp);
- return (val<<7) + tmp;
- }
- }
- return -1;
-}
-
-static int get_str(ByteIOContext *bc, char *string, unsigned int maxlen){
- unsigned int len= get_v(bc);
-
- if(len && maxlen)
- get_buffer(bc, string, FFMIN(len, maxlen));
- while(len > maxlen){
- get_byte(bc);
- len--;
- }
-
- if(maxlen)
- string[FFMIN(len, maxlen-1)]= 0;
-
- if(maxlen == len)
- return -1;
- else
- return 0;
-}
-
-static int64_t get_s(ByteIOContext *bc){
- int64_t v = get_v(bc) + 1;
-
- if (v&1) return -(v>>1);
- else return (v>>1);
-}
-
-static uint64_t get_vb(ByteIOContext *bc){
- uint64_t val=0;
- unsigned int i= get_v(bc);
-
- if(i>8)
- return UINT64_MAX;
-
- while(i--)
- val = (val<<8) + get_byte(bc);
-
-//av_log(NULL, AV_LOG_DEBUG, "get_vb()= %"PRId64"\n", val);
- return val;
-}
-
-#ifdef TRACE
-static inline uint64_t get_v_trace(ByteIOContext *bc, char *file, char *func, int line){
- uint64_t v= get_v(bc);
-
- printf("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);
- 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);
- return v;
-}
-#define 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)
-{
- int64_t start, size;
- start= url_ftell(bc) - 8;
-
- size= get_v(bc);
-
- init_checksum(bc, calculate_checksum ? av_adler32_update : NULL, 1);
-
- nut->packet_start[2] = start;
- nut->written_packet_size= size;
-
- return size;
-}
-
-static int check_checksum(ByteIOContext *bc){
- unsigned long checksum= get_checksum(bc);
- return checksum != get_be32(bc);
-}
-
-/**
- *
- */
-static int get_length(uint64_t val){
- int i;
-
- for (i=7; val>>i; i+=7);
-
- return i;
-}
-
-static uint64_t find_any_startcode(ByteIOContext *bc, int64_t pos){
- uint64_t state=0;
-
- if(pos >= 0)
- 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 are currently
-
- while(!url_feof(bc)){
- state= (state<<8) | get_byte(bc);
- if((state>>56) != 'N')
- continue;
- switch(state){
- case MAIN_STARTCODE:
- case STREAM_STARTCODE:
- case KEYFRAME_STARTCODE:
- case INFO_STARTCODE:
- case INDEX_STARTCODE:
- return state;
- }
- }
-
- return 0;
-}
-
-/**
- * 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 find_startcode(ByteIOContext *bc, uint64_t code, int64_t pos){
- for(;;){
- uint64_t startcode= find_any_startcode(bc, pos);
- if(startcode == code)
- return url_ftell(bc) - 8;
- else if(startcode == 0)
- return -1;
- pos=-1;
- }
-}
-
-static int64_t lsb2full(StreamContext *stream, int64_t lsb){
- int64_t mask = (1<<stream->msb_timestamp_shift)-1;
- int64_t delta= stream->last_pts - mask/2;
- return ((lsb - delta)&mask) + delta;
-}
-
-#ifdef CONFIG_MUXERS
-
-static void put_v(ByteIOContext *bc, uint64_t val)
-{
- int i;
-
-//av_log(NULL, AV_LOG_DEBUG, "put_v()= %"PRId64"\n", val);
- val &= 0x7FFFFFFFFFFFFFFFULL; // FIXME can only encode upto 63 bits currently
- i= get_length(val);
-
- for (i-=7; i>0; i-=7){
- put_byte(bc, 0x80 | (val>>i));
- }
-
- put_byte(bc, val&0x7f);
-}
-
-/**
- * stores a string as vb.
- */
-static void put_str(ByteIOContext *bc, const char *string){
- int len= strlen(string);
-
- put_v(bc, len);
- put_buffer(bc, string, len);
-}
-
-static void put_s(ByteIOContext *bc, int64_t val){
- if (val<=0) put_v(bc, -2*val );
- else put_v(bc, 2*val-1);
-}
-
-static void put_vb(ByteIOContext *bc, uint64_t val){
- int i;
-
- for (i=8; val>>i; i+=8);
-
- put_v(bc, i>>3);
- for(i-=8; i>=0; i-=8)
- put_byte(bc, (val>>i)&0xFF);
-}
-
-#ifdef TRACE
-static inline void put_v_trace(ByteIOContext *bc, uint64_t v, char *file, char *func, int line){
- printf("get_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
-
- put_v(bc, v);
-}
-
-static inline void put_s_trace(ByteIOContext *bc, int64_t v, char *file, char *func, int line){
- printf("get_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
-
- put_s(bc, v);
-}
-
-static inline void put_vb_trace(ByteIOContext *bc, uint64_t v, char *file, char *func, int line){
- printf("get_vb %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
-
- put_vb(bc, v);
-}
-#define put_v(bc, v) put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#define put_vb(bc, v) put_vb_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
-#endif
-
-static int put_packetheader(NUTContext *nut, ByteIOContext *bc, int max_size, int calculate_checksum)
-{
- put_flush_packet(bc);
- nut->packet_start[2]= url_ftell(bc) - 8;
- nut->written_packet_size = max_size;
-
- /* packet header */
- put_v(bc, nut->written_packet_size); /* forward ptr */
-
- if(calculate_checksum)
- init_checksum(bc, av_adler32_update, 1);
-
- return 0;
-}
-
-/**
- *
- * must not be called more then once per packet
- */
-static int update_packetheader(NUTContext *nut, ByteIOContext *bc, int additional_size, int calculate_checksum){
- int64_t start= nut->packet_start[2];
- int64_t cur= url_ftell(bc);
- int size= cur - start - get_length(nut->written_packet_size)/7 - 8;
-
- if(calculate_checksum)
- size += 4;
-
- if(size != nut->written_packet_size){
- int i;
-
- assert( size <= nut->written_packet_size );
-
- url_fseek(bc, start + 8, SEEK_SET);
- for(i=get_length(size); i < get_length(nut->written_packet_size); i+=7)
- put_byte(bc, 0x80);
- put_v(bc, size);
-
- url_fseek(bc, cur, SEEK_SET);
- nut->written_packet_size= size; //FIXME may fail if multiple updates with differing sizes, as get_length may differ
-
- if(calculate_checksum)
- put_be32(bc, get_checksum(bc));
- }
-
- return 0;
-}
-
-static int nut_write_header(AVFormatContext *s)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- AVCodecContext *codec;
- int i, j, tmp_time, tmp_flags,tmp_stream, tmp_mul, tmp_size, tmp_fields;
-
- if (strcmp(s->filename, "./data/b-libav.nut")) {
- av_log(s, AV_LOG_ERROR, " libavformat NUT is non-compliant and disabled\n");
- return -1;
- }
-
- nut->avf= s;
-
- nut->stream =
- av_mallocz(sizeof(StreamContext)*s->nb_streams);
-
-
- put_buffer(bc, ID_STRING, strlen(ID_STRING));
- put_byte(bc, 0);
- nut->packet_start[2]= url_ftell(bc);
-
- /* main header */
- put_be64(bc, MAIN_STARTCODE);
- put_packetheader(nut, bc, 120+5*256, 1);
- put_v(bc, 2); /* version */
- put_v(bc, s->nb_streams);
- put_v(bc, MAX_DISTANCE);
- put_v(bc, MAX_SHORT_DISTANCE);
-
- put_v(bc, nut->rate_num=1);
- put_v(bc, nut->rate_den=2);
- put_v(bc, nut->short_startcode=0x4EFE79);
-
- build_frame_code(s);
- assert(nut->frame_code['N'].flags == FLAG_INVALID);
-
- tmp_time= tmp_flags= tmp_stream= tmp_mul= tmp_size= /*tmp_res=*/ INT_MAX;
- for(i=0; i<256;){
- tmp_fields=0;
- tmp_size= 0;
- if(tmp_time != nut->frame_code[i].timestamp_delta) tmp_fields=1;
- if(tmp_mul != nut->frame_code[i].size_mul ) tmp_fields=2;
- if(tmp_stream != nut->frame_code[i].stream_id_plus1) tmp_fields=3;
- if(tmp_size != nut->frame_code[i].size_lsb ) tmp_fields=4;
-// if(tmp_res != nut->frame_code[i].res ) tmp_fields=5;
-
- tmp_time = nut->frame_code[i].timestamp_delta;
- tmp_flags = nut->frame_code[i].flags;
- tmp_stream= nut->frame_code[i].stream_id_plus1;
- tmp_mul = nut->frame_code[i].size_mul;
- tmp_size = nut->frame_code[i].size_lsb;
-// tmp_res = nut->frame_code[i].res;
-
- for(j=0; i<256; j++,i++){
- if(nut->frame_code[i].timestamp_delta != tmp_time ) break;
- if(nut->frame_code[i].flags != tmp_flags ) break;
- if(nut->frame_code[i].stream_id_plus1 != tmp_stream) break;
- if(nut->frame_code[i].size_mul != tmp_mul ) break;
- if(nut->frame_code[i].size_lsb != tmp_size+j) break;
-// if(nut->frame_code[i].res != tmp_res ) break;
- }
- if(j != tmp_mul - tmp_size) tmp_fields=6;
-
- put_v(bc, tmp_flags);
- put_v(bc, tmp_fields);
- if(tmp_fields>0) put_s(bc, tmp_time);
- if(tmp_fields>1) put_v(bc, tmp_mul);
- if(tmp_fields>2) put_v(bc, tmp_stream);
- if(tmp_fields>3) put_v(bc, tmp_size);
- if(tmp_fields>4) put_v(bc, 0 /*tmp_res*/);
- if(tmp_fields>5) put_v(bc, j);
- }
-
- update_packetheader(nut, bc, 0, 1);
-
- /* stream headers */
- for (i = 0; i < s->nb_streams; i++)
- {
- int nom, denom, ssize;
-
- codec = s->streams[i]->codec;
-
- put_be64(bc, STREAM_STARTCODE);
- put_packetheader(nut, bc, 120 + codec->extradata_size, 1);
- put_v(bc, i /*s->streams[i]->index*/);
- switch(codec->codec_type){
- case CODEC_TYPE_VIDEO: put_v(bc, 0); break;
- case CODEC_TYPE_AUDIO: put_v(bc, 1); break;
-// case CODEC_TYPE_TEXT : put_v(bc, 2); break;
- case CODEC_TYPE_DATA : put_v(bc, 3); break;
- default: return -1;
- }
- if (codec->codec_tag)
- put_vb(bc, codec->codec_tag);
- else if (codec->codec_type == CODEC_TYPE_VIDEO)
- {
- put_vb(bc, codec_get_bmp_tag(codec->codec_id));
- }
- else if (codec->codec_type == CODEC_TYPE_AUDIO)
- {
- put_vb(bc, codec_get_wav_tag(codec->codec_id));
- }
- else
- put_vb(bc, 0);
-
- ff_parse_specific_params(codec, &nom, &ssize, &denom);
-
- nut->stream[i].rate_num= nom;
- nut->stream[i].rate_den= denom;
- av_set_pts_info(s->streams[i], 60, denom, nom);
-
- put_v(bc, codec->bit_rate);
- put_vb(bc, 0); /* no language code */
- put_v(bc, nom);
- put_v(bc, denom);
- if(nom / denom < 1000)
- nut->stream[i].msb_timestamp_shift = 7;
- else
- nut->stream[i].msb_timestamp_shift = 14;
- put_v(bc, nut->stream[i].msb_timestamp_shift);
- put_v(bc, codec->has_b_frames);
- put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
-
- if(codec->extradata_size){
- put_v(bc, 1);
- put_v(bc, codec->extradata_size);
- put_buffer(bc, codec->extradata, codec->extradata_size);
- }
- put_v(bc, 0); /* end of codec specific headers */
-
- switch(codec->codec_type)
- {
- case CODEC_TYPE_AUDIO:
- put_v(bc, codec->sample_rate);
- put_v(bc, 1);
- put_v(bc, codec->channels);
- break;
- case CODEC_TYPE_VIDEO:
- put_v(bc, codec->width);
- put_v(bc, codec->height);
- put_v(bc, codec->sample_aspect_ratio.num);
- put_v(bc, codec->sample_aspect_ratio.den);
- put_v(bc, 0); /* csp type -- unknown */
- break;
- default:
- break;
- }
- update_packetheader(nut, bc, 0, 1);
- }
-
- /* info header */
- put_be64(bc, INFO_STARTCODE);
- put_packetheader(nut, bc, 30+strlen(s->author)+strlen(s->title)+
- strlen(s->comment)+strlen(s->copyright)+strlen(LIBAVFORMAT_IDENT), 1);
- if (s->author[0])
- {
- put_v(bc, 9); /* type */
- put_str(bc, s->author);
- }
- if (s->title[0])
- {
- put_v(bc, 10); /* type */
- put_str(bc, s->title);
- }
- if (s->comment[0])
- {
- put_v(bc, 11); /* type */
- put_str(bc, s->comment);
- }
- if (s->copyright[0])
- {
- put_v(bc, 12); /* type */
- put_str(bc, s->copyright);
- }
- /* encoder */
- if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)){
- put_v(bc, 13); /* type */
- put_str(bc, LIBAVFORMAT_IDENT);
- }
-
- put_v(bc, 0); /* eof info */
- update_packetheader(nut, bc, 0, 1);
-
- put_flush_packet(bc);
-
- return 0;
-}
-
-static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- NUTContext *nut = s->priv_data;
- StreamContext *stream= &nut->stream[pkt->stream_index];
- ByteIOContext *bc = &s->pb;
- int key_frame = 0, full_pts=0;
- AVCodecContext *enc;
- int64_t coded_pts;
- int frame_type, best_length, frame_code, flags, i, size_mul, size_lsb, time_delta;
- const int64_t frame_start= url_ftell(bc);
- int64_t pts= pkt->pts;
- int size= pkt->size;
- int stream_index= pkt->stream_index;
-
- enc = s->streams[stream_index]->codec;
- key_frame = !!(pkt->flags & PKT_FLAG_KEY);
-
- frame_type=0;
- if(frame_start + size + 20 - FFMAX(nut->packet_start[1], nut->packet_start[2]) > MAX_DISTANCE)
- frame_type=2;
- if(key_frame && !stream->last_key_frame)
- frame_type=2;
-
- if(frame_type>1){
- int64_t global_ts= av_rescale(pts, stream->rate_den*(int64_t)nut->rate_num, stream->rate_num*(int64_t)nut->rate_den);
- reset(s, global_ts);
- put_be64(bc, KEYFRAME_STARTCODE);
- put_v(bc, global_ts);
- }
- assert(stream->last_pts != AV_NOPTS_VALUE);
- coded_pts = pts & ((1<<stream->msb_timestamp_shift)-1);
- if(lsb2full(stream, coded_pts) != pts)
- full_pts=1;
-
- if(full_pts)
- coded_pts= pts + (1<<stream->msb_timestamp_shift);
-
- best_length=INT_MAX;
- frame_code= -1;
- for(i=0; i<256; i++){
- int stream_id_plus1= nut->frame_code[i].stream_id_plus1;
- int fc_key_frame;
- int length=0;
- size_mul= nut->frame_code[i].size_mul;
- size_lsb= nut->frame_code[i].size_lsb;
- time_delta= nut->frame_code[i].timestamp_delta;
- flags= nut->frame_code[i].flags;
-
- assert(size_mul > size_lsb);
-
- if(stream_id_plus1 == 0) length+= get_length(stream_index);
- else if(stream_id_plus1 - 1 != stream_index)
- continue;
- fc_key_frame= !!(flags & FLAG_KEY_FRAME);
-
- assert(key_frame==0 || key_frame==1);
- if(fc_key_frame != key_frame)
- continue;
-
- if(flags & FLAG_DATA_SIZE){
- if(size % size_mul != size_lsb)
- continue;
- length += get_length(size / size_mul);
- }else if(size != size_lsb)
- continue;
-
- if(full_pts && time_delta)
- continue;
-
- if(!time_delta){
- length += get_length(coded_pts);
- }else{
- if(time_delta != pts - stream->last_pts)
- continue;
- }
-
- if(length < best_length){
- best_length= length;
- frame_code=i;
- }
-// av_log(s, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d %d %d\n", key_frame, frame_type, full_pts, size, stream_index, flags, size_mul, size_lsb, stream_id_plus1, length);
- }
-
- assert(frame_code != -1);
- flags= nut->frame_code[frame_code].flags;
- size_mul= nut->frame_code[frame_code].size_mul;
- size_lsb= nut->frame_code[frame_code].size_lsb;
- time_delta= nut->frame_code[frame_code].timestamp_delta;
-#ifdef TRACE
- best_length /= 7;
- best_length ++; //frame_code
- if(frame_type==2){
- best_length += 8; // startcode
- }
- av_log(s, AV_LOG_DEBUG, "kf:%d ft:%d pt:%d fc:%2X len:%2d size:%d stream:%d flag:%d mul:%d lsb:%d s+1:%d pts_delta:%d pts:%"PRId64" fs:%"PRId64"\n", key_frame, frame_type, full_pts ? 1 : 0, frame_code, best_length, size, stream_index, flags, size_mul, size_lsb, nut->frame_code[frame_code].stream_id_plus1,(int)(pts - stream->last_pts), pts, frame_start);
-// av_log(s, AV_LOG_DEBUG, "%d %d %d\n", stream->lru_pts_delta[0], stream->lru_pts_delta[1], stream->lru_pts_delta[2]);
-#endif
-
- assert(frame_type != 1); //short startcode not implemented yet
- put_byte(bc, frame_code);
-
- if(nut->frame_code[frame_code].stream_id_plus1 == 0)
- put_v(bc, stream_index);
- if (!time_delta){
- put_v(bc, coded_pts);
- }
- if(flags & FLAG_DATA_SIZE)
- put_v(bc, size / size_mul);
- else
- assert(size == size_lsb);
- if(size > MAX_DISTANCE){
- assert(frame_type > 1);
- }
-
- put_buffer(bc, pkt->data, size);
-
- update(nut, stream_index, frame_start, frame_type, frame_code, key_frame, size, pts);
-
- return 0;
-}
-
-static int nut_write_trailer(AVFormatContext *s)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
-
-#if 0
- int i;
-
- /* WRITE INDEX */
-
- for (i = 0; s->nb_streams; i++)
- {
- put_be64(bc, INDEX_STARTCODE);
- put_packetheader(nut, bc, 64, 1);
- put_v(bc, s->streams[i]->id);
- put_v(bc, ...);
- update_packetheader(nut, bc, 0, 1);
- }
-#endif
-
- put_flush_packet(bc);
-
- av_freep(&nut->stream);
-
- return 0;
-}
-#endif //CONFIG_MUXERS
-
-static int nut_probe(AVProbeData *p)
-{
- int i;
- uint64_t code= 0xff;
-
- for (i = 0; i < p->buf_size; i++) {
- code = (code << 8) | p->buf[i];
- if (code == MAIN_STARTCODE)
- return AVPROBE_SCORE_MAX;
- }
- return 0;
-}
-
-static int decode_main_header(NUTContext *nut){
- AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
- uint64_t tmp;
- int i, j, tmp_stream, tmp_mul, tmp_time, tmp_size, count, tmp_res;
-
- get_packetheader(nut, bc, 1);
-
- tmp = get_v(bc);
- if (tmp != 2){
- av_log(s, AV_LOG_ERROR, "bad version (%"PRId64")\n", tmp);
- return -1;
- }
-
- nut->stream_count = get_v(bc);
- if(nut->stream_count > MAX_STREAMS){
- av_log(s, AV_LOG_ERROR, "too many streams\n");
- return -1;
- }
- nut->max_distance = get_v(bc);
- nut->max_short_distance = get_v(bc);
- nut->rate_num= get_v(bc);
- nut->rate_den= get_v(bc);
- nut->short_startcode= get_v(bc);
- if(nut->short_startcode>>16 != 'N'){
- av_log(s, AV_LOG_ERROR, "invalid short startcode %X\n", nut->short_startcode);
- return -1;
- }
-
- for(i=0; i<256;){
- int tmp_flags = get_v(bc);
- int tmp_fields= get_v(bc);
- if(tmp_fields>0) tmp_time = 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);
- else tmp_size = 0;
- if(tmp_fields>4) tmp_res = get_v(bc);
- else tmp_res = 0;
- if(tmp_fields>5) count = get_v(bc);
- else count = tmp_mul - tmp_size;
-
- while(tmp_fields-- > 6)
- get_v(bc);
-
- if(count == 0 || i+count > 256){
- av_log(s, AV_LOG_ERROR, "illegal count %d at %d\n", count, i);
- return -1;
- }
- if(tmp_stream > nut->stream_count + 1){
- av_log(s, AV_LOG_ERROR, "illegal stream number\n");
- return -1;
- }
-
- for(j=0; j<count; j++,i++){
- nut->frame_code[i].flags = tmp_flags ;
- nut->frame_code[i].timestamp_delta = tmp_time ;
- nut->frame_code[i].stream_id_plus1 = tmp_stream;
- 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 ;
- }
- }
- if(nut->frame_code['N'].flags != FLAG_INVALID){
- av_log(s, AV_LOG_ERROR, "illegal frame_code table\n");
- return -1;
- }
-
- if(check_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Main header checksum mismatch\n");
- return -1;
- }
-
- return 0;
-}
-
-static int decode_stream_header(NUTContext *nut){
- AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
- int class, nom, denom, stream_id;
- uint64_t tmp;
- AVStream *st;
-
- get_packetheader(nut, bc, 1);
- stream_id= get_v(bc);
- if(stream_id >= nut->stream_count || s->streams[stream_id])
- return -1;
-
- st = av_new_stream(s, stream_id);
- if (!st)
- return AVERROR(ENOMEM);
-
- class = get_v(bc);
- tmp = get_vb(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");
- break;
- case 1:
- case 32: //compatibility
- 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");
- break;
- case 2:
-// st->codec->codec_type = CODEC_TYPE_TEXT;
-// break;
- case 3:
- st->codec->codec_type = CODEC_TYPE_DATA;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "Unknown stream class (%d)\n", class);
- return -1;
- }
- s->bit_rate += get_v(bc);
- get_vb(bc); /* language code */
- nom = get_v(bc);
- denom = get_v(bc);
- nut->stream[stream_id].msb_timestamp_shift = get_v(bc);
- st->codec->has_b_frames=
- nut->stream[stream_id].decode_delay= get_v(bc);
- get_byte(bc); /* flags */
-
- /* codec specific data headers */
- while(get_v(bc) != 0){
- st->codec->extradata_size= get_v(bc);
- if((unsigned)st->codec->extradata_size > (1<<30))
- return -1;
- st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- get_buffer(bc, st->codec->extradata, st->codec->extradata_size);
-// url_fskip(bc, get_v(bc));
- }
-
- if (st->codec->codec_type == CODEC_TYPE_VIDEO) /* VIDEO */
- {
- st->codec->width = get_v(bc);
- st->codec->height = get_v(bc);
- st->codec->sample_aspect_ratio.num= get_v(bc);
- st->codec->sample_aspect_ratio.den= get_v(bc);
- get_v(bc); /* csp type */
- }
- if (st->codec->codec_type == CODEC_TYPE_AUDIO) /* AUDIO */
- {
- st->codec->sample_rate = get_v(bc);
- get_v(bc); // samplerate_den
- st->codec->channels = get_v(bc);
- }
- if(check_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Stream header %d checksum mismatch\n", stream_id);
- return -1;
- }
- av_set_pts_info(s->streams[stream_id], 60, denom, nom);
- nut->stream[stream_id].rate_num= nom;
- nut->stream[stream_id].rate_den= denom;
- return 0;
-}
-
-static int decode_info_header(NUTContext *nut){
- AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
-
- get_packetheader(nut, bc, 1);
-
- for(;;){
- int id= get_v(bc);
- char *name, *type, custom_name[256], custom_type[256];
-
- if(!id)
- break;
- else if(id >= sizeof(info_table)/sizeof(info_table[0])){
- av_log(s, AV_LOG_ERROR, "info id is too large %d %zd\n", id, sizeof(info_table)/sizeof(info_table[0]));
- return -1;
- }
-
- type= info_table[id][1];
- name= info_table[id][0];
-//av_log(s, AV_LOG_DEBUG, "%d %s %s\n", id, type, name);
-
- if(!type){
- get_str(bc, custom_type, sizeof(custom_type));
- type= custom_type;
- }
- if(!name){
- get_str(bc, custom_name, sizeof(custom_name));
- name= custom_name;
- }
-
- if(!strcmp(type, "v")){
- get_v(bc);
- }else{
- if(!strcmp(name, "Author"))
- get_str(bc, s->author, sizeof(s->author));
- else if(!strcmp(name, "Title"))
- get_str(bc, s->title, sizeof(s->title));
- else if(!strcmp(name, "Copyright"))
- get_str(bc, s->copyright, sizeof(s->copyright));
- else if(!strcmp(name, "Description"))
- get_str(bc, s->comment, sizeof(s->comment));
- else
- get_str(bc, NULL, 0);
- }
- }
- if(check_checksum(bc)){
- av_log(s, AV_LOG_ERROR, "Info header checksum mismatch\n");
- return -1;
- }
- return 0;
-}
-
-static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- int64_t pos;
- int inited_stream_count;
-
- nut->avf= s;
-
- /* main header */
- pos=0;
- for(;;){
- pos= find_startcode(bc, MAIN_STARTCODE, pos)+1;
- if (pos<0){
- av_log(s, AV_LOG_ERROR, "no main startcode found\n");
- return -1;
- }
- if(decode_main_header(nut) >= 0)
- break;
- }
-
-
- s->bit_rate = 0;
-
- nut->stream = av_malloc(sizeof(StreamContext)*nut->stream_count);
-
- /* stream headers */
- pos=0;
- for(inited_stream_count=0; inited_stream_count < nut->stream_count;){
- pos= find_startcode(bc, STREAM_STARTCODE, pos)+1;
- if (pos<0+1){
- av_log(s, AV_LOG_ERROR, "not all stream headers found\n");
- return -1;
- }
- if(decode_stream_header(nut) >= 0)
- inited_stream_count++;
- }
-
- /* info headers */
- pos=0;
- for(;;){
- uint64_t startcode= find_any_startcode(bc, pos);
- pos= url_ftell(bc);
-
- if(startcode==0){
- av_log(s, AV_LOG_ERROR, "EOF before video frames\n");
- return -1;
- }else if(startcode == KEYFRAME_STARTCODE){
- nut->next_startcode= startcode;
- break;
- }else if(startcode != INFO_STARTCODE){
- continue;
- }
-
- decode_info_header(nut);
- }
-
- return 0;
-}
-
-static int decode_frame_header(NUTContext *nut, int *key_frame_ret, int64_t *pts_ret, int *stream_id_ret, int frame_code, int frame_type, int64_t frame_start){
- AVFormatContext *s= nut->avf;
- StreamContext *stream;
- ByteIOContext *bc = &s->pb;
- int size, flags, size_mul, size_lsb, stream_id, time_delta;
- int64_t pts = 0;
-
- if(frame_type < 2 && frame_start - nut->packet_start[2] > nut->max_distance){
- av_log(s, AV_LOG_ERROR, "last frame must have been damaged\n");
- return -1;
- }
-
- if(frame_type)
- nut->packet_start[ frame_type ]= frame_start; //otherwise 1 goto 1 may happen
-
- flags= nut->frame_code[frame_code].flags;
- size_mul= nut->frame_code[frame_code].size_mul;
- size_lsb= nut->frame_code[frame_code].size_lsb;
- stream_id= nut->frame_code[frame_code].stream_id_plus1 - 1;
- time_delta= nut->frame_code[frame_code].timestamp_delta;
-
- if(stream_id==-1)
- stream_id= get_v(bc);
- if(stream_id >= s->nb_streams){
- av_log(s, AV_LOG_ERROR, "illegal stream_id\n");
- return -1;
- }
- stream= &nut->stream[stream_id];
-
-// av_log(s, AV_LOG_DEBUG, "ft:%d ppts:%d %d %d\n", frame_type, stream->lru_pts_delta[0], stream->lru_pts_delta[1], stream->lru_pts_delta[2]);
-
- *key_frame_ret= !!(flags & FLAG_KEY_FRAME);
-
- if(!time_delta){
- int64_t mask = (1<<stream->msb_timestamp_shift)-1;
- pts= get_v(bc);
- if(pts > mask){
- pts -= mask+1;
- }else{
- if(stream->last_pts == AV_NOPTS_VALUE){
- av_log(s, AV_LOG_ERROR, "no reference pts available\n");
- return -1;
- }
- pts= lsb2full(stream, pts);
- }
- }else{
- if(stream->last_pts == AV_NOPTS_VALUE){
- av_log(s, AV_LOG_ERROR, "no reference pts available\n");
- return -1;
- }
- pts= stream->last_pts + time_delta;
- }
-
- if(*key_frame_ret){
-// av_log(s, AV_LOG_DEBUG, "stream:%d start:%"PRId64" pts:%"PRId64" length:%"PRId64"\n",stream_id, frame_start, av_pts, frame_start - nut->stream[stream_id].last_sync_pos);
- av_add_index_entry(
- s->streams[stream_id],
- frame_start,
- pts,
- 0,
- frame_start - nut->stream[stream_id].last_sync_pos,
- AVINDEX_KEYFRAME);
- nut->stream[stream_id].last_sync_pos= frame_start;
-// assert(nut->packet_start == frame_start);
- }
-
- assert(size_mul > size_lsb);
- size= size_lsb;
- if(flags & FLAG_DATA_SIZE)
- size+= size_mul*get_v(bc);
-
-#ifdef TRACE
-av_log(s, AV_LOG_DEBUG, "fs:%"PRId64" fc:%d ft:%d kf:%d pts:%"PRId64" size:%d mul:%d lsb:%d flags:%d delta:%d\n", frame_start, frame_code, frame_type, *key_frame_ret, pts, size, size_mul, size_lsb, flags, time_delta);
-#endif
-
- if(frame_type==0 && url_ftell(bc) - nut->packet_start[2] + size > nut->max_distance){
- av_log(s, AV_LOG_ERROR, "frame size too large\n");
- return -1;
- }
-
- *stream_id_ret = stream_id;
- *pts_ret = pts;
-
- update(nut, stream_id, frame_start, frame_type, frame_code, *key_frame_ret, size, pts);
-
- return size;
-}
-
-static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code, int frame_type, int64_t frame_start){
- AVFormatContext *s= nut->avf;
- ByteIOContext *bc = &s->pb;
- int size, stream_id, key_frame, discard;
- int64_t pts, last_IP_pts;
-
- size= decode_frame_header(nut, &key_frame, &pts, &stream_id, frame_code, frame_type, frame_start);
- if(size < 0)
- return -1;
-
- discard= s->streams[ stream_id ]->discard;
- last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
- if( (discard >= AVDISCARD_NONKEY && !key_frame)
- ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
- || discard >= AVDISCARD_ALL){
- url_fskip(bc, size);
- return 1;
- }
-
- av_get_packet(bc, pkt, size);
- pkt->stream_index = stream_id;
- if (key_frame)
- pkt->flags |= PKT_FLAG_KEY;
- pkt->pts = pts;
-
- return 0;
-}
-
-static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- int i, frame_code=0, ret;
-
- for(;;){
- int64_t pos= url_ftell(bc);
- int frame_type= 0;
- 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(frame_code == 'N'){
- tmp= frame_code;
- for(i=1; i<8; i++)
- tmp = (tmp<<8) + get_byte(bc);
- }
- }
- switch(tmp){
- case MAIN_STARTCODE:
- case STREAM_STARTCODE:
- case INDEX_STARTCODE:
- get_packetheader(nut, bc, 0);
- assert(nut->packet_start[2] == pos);
- url_fseek(bc, nut->written_packet_size, SEEK_CUR);
- break;
- case INFO_STARTCODE:
- if(decode_info_header(nut)<0)
- goto resync;
- break;
- case KEYFRAME_STARTCODE:
- frame_type = 2;
- reset(s, get_v(bc));
- frame_code = get_byte(bc);
- case 0:
- ret= decode_frame(nut, pkt, frame_code, frame_type, pos);
- if(ret==0)
- return 0;
- else if(ret==1) //ok but discard packet
- break;
- default:
-resync:
-av_log(s, AV_LOG_DEBUG, "syncing from %"PRId64"\n", nut->packet_start[2]+1);
- tmp= find_any_startcode(bc, nut->packet_start[2]+1);
- if(tmp==0)
- return -1;
-av_log(s, AV_LOG_DEBUG, "sync\n");
- nut->next_startcode= tmp;
- }
- }
-}
-
-static int64_t nut_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos_arg, int64_t pos_limit){
- NUTContext *nut = s->priv_data;
- StreamContext *stream;
- ByteIOContext *bc = &s->pb;
- int64_t pos, pts;
- uint64_t code;
- int frame_code,step, stream_id, i,size, key_frame;
-av_log(s, AV_LOG_DEBUG, "read_timestamp(X,%d,%"PRId64",%"PRId64")\n", stream_index, *pos_arg, pos_limit);
-
- if(*pos_arg < 0)
- return AV_NOPTS_VALUE;
-
- pos= *pos_arg;
- step= FFMIN(16*1024, pos);
- do{
- pos-= step;
- code= find_any_startcode(bc, pos);
-
- if(code && url_ftell(bc) - 8 <= *pos_arg)
- break;
- step= FFMIN(2*step, pos);
- }while(step);
-
- if(!code) //nothing found, not even after pos_arg
- return AV_NOPTS_VALUE;
-
- url_fseek(bc, -8, SEEK_CUR);
- for(i=0; i<s->nb_streams; i++)
- nut->stream[i].last_sync_pos= url_ftell(bc);
-
- for(;;){
- int frame_type=0;
- int64_t pos= url_ftell(bc);
- uint64_t tmp=0;
-
- if(pos > pos_limit || url_feof(bc))
- return AV_NOPTS_VALUE;
-
- frame_code = get_byte(bc);
- if(frame_code == 'N'){
- tmp= frame_code;
- for(i=1; i<8; i++)
- tmp = (tmp<<8) + get_byte(bc);
- }
-//av_log(s, AV_LOG_DEBUG, "before switch %"PRIX64" at=%"PRId64"\n", tmp, pos);
-
- switch(tmp){
- case MAIN_STARTCODE:
- case STREAM_STARTCODE:
- case INDEX_STARTCODE:
- case INFO_STARTCODE:
- get_packetheader(nut, bc, 0);
- assert(nut->packet_start[2]==pos);
- url_fseek(bc, nut->written_packet_size, SEEK_CUR);
- break;
- case KEYFRAME_STARTCODE:
- frame_type=2;
- reset(s, get_v(bc));
- frame_code = get_byte(bc);
- case 0:
- size= decode_frame_header(nut, &key_frame, &pts, &stream_id, frame_code, frame_type, pos);
- if(size < 0)
- goto resync;
-
- stream= &nut->stream[stream_id];
- if(stream_id != stream_index || !key_frame || pos < *pos_arg){
- url_fseek(bc, size, SEEK_CUR);
- break;
- }
-
- *pos_arg= pos;
- return pts;
- default:
-resync:
-av_log(s, AV_LOG_DEBUG, "syncing from %"PRId64"\n", nut->packet_start[2]+1);
- if(!find_any_startcode(bc, nut->packet_start[2]+1))
- return AV_NOPTS_VALUE;
-
- url_fseek(bc, -8, SEEK_CUR);
- }
- }
- return AV_NOPTS_VALUE;
-}
-
-static int nut_read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
-// NUTContext *nut = s->priv_data;
- int64_t pos;
-
- if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
- return -1;
-
- pos= url_ftell(&s->pb);
- nut_read_timestamp(s, stream_index, &pos, pos-1);
-
- return 0;
-}
-
-static int nut_read_close(AVFormatContext *s)
-{
- NUTContext *nut = s->priv_data;
-
- av_freep(&nut->stream);
-
- return 0;
-}
-
-#ifdef CONFIG_NUT_DEMUXER
-AVInputFormat nut_demuxer = {
- "nut",
- "nut format",
- sizeof(NUTContext),
- nut_probe,
- nut_read_header,
- nut_read_packet,
- nut_read_close,
- nut_read_seek,
- nut_read_timestamp,
- .extensions = "nut",
-};
-#endif
-#ifdef CONFIG_NUT_MUXER
-AVOutputFormat nut_muxer = {
- "nut",
- "nut format",
- "video/x-nut",
- "nut",
- sizeof(NUTContext),
-#ifdef CONFIG_LIBVORBIS
- CODEC_ID_VORBIS,
-#elif defined(CONFIG_LIBMP3LAME)
- CODEC_ID_MP3,
-#else
- CODEC_ID_MP2, /* AC3 needs liba52 decoder */
-#endif
- CODEC_ID_MPEG4,
- nut_write_header,
- nut_write_packet,
- nut_write_trailer,
- .flags = AVFMT_GLOBALHEADER,
-};
-#endif
--
Libav/FFmpeg packaging
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