diff options
Diffstat (limited to 'libavformat/nut.c')
-rw-r--r-- | libavformat/nut.c | 1455 |
1 files changed, 0 insertions, 1455 deletions
diff --git a/libavformat/nut.c b/libavformat/nut.c deleted file mode 100644 index 4a531dbae4..0000000000 --- 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 |