From a5247e3d8de5d7a7210c2e951356c1f0b1995aad Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 3 Apr 2004 21:00:14 +0000 Subject: [PATCH] nut (de)muxer update conform to latest spec remove get/put_s() not needed anymore update_packetheader() fixed (wasnt always working) store/load extradata & aspect ratio memleak fix dont use vorbis by default yet use frame_size from the codec instead of hardcoding it in the source Originally committed as revision 2951 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/nut.c | 728 ++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 572 insertions(+), 156 deletions(-) diff --git a/libavformat/nut.c b/libavformat/nut.c index f905410..a7f91f5 100644 --- a/libavformat/nut.c +++ b/libavformat/nut.c @@ -1,6 +1,7 @@ /* - * "NUT" Container Format muxer and demuxer (DRAFT-20031003) + * "NUT" Container Format muxer and demuxer (DRAFT-200403??) * Copyright (c) 2003 Alex Beregszaszi + * Copyright (c) 2004 Michael Niedermayer * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -25,35 +26,204 @@ /* * TODO: * - checksumming - * - optimal timestamp handling + * - seeking * - index writing * - info and index packet reading support * - startcode searching for broken streams - * - subpacket support */ //#define DEBUG 1 +#include #include "avformat.h" #include "mpegaudio.h" #include "avi.h" +#undef NDEBUG +#include + //from /dev/random -#define MAIN_STARTCODE (0xF9526A6200000000ULL + ('N'<<24) + ('U'<<16) + ('T'<<8) + 'M') -#define STREAM_STARTCODE (0xD667773F00000000ULL + ('N'<<24) + ('U'<<16) + ('T'<<8) + 'S') -#define KEYFRAME_STARTCODE (0xCB86308700000000ULL + ('N'<<24) + ('U'<<16) + ('T'<<8) + 'K') -#define INDEX_STARTCODE (0xEBFCDE0E00000000ULL + ('N'<<24) + ('U'<<16) + ('T'<<8) + 'X') -#define INFO_STARTCODE (0xA37B643500000000ULL + ('N'<<24) + ('U'<<16) + ('T'<<8) + 'I') +#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 MAX_TYPE1_DISTANCE (1024*16-1) +#define MAX_TYPE2_DISTANCE (1024*64-1) + +#define MAX_SIZE_LRU 2 +#define MAX_PTS_LRU 3 + +#define FLAG_FRAME_TYPE 1 +#define FLAG_DATA_SIZE 2 +#define FLAG_PTS 16 +#define FLAG_FULL_PTS 4 +#define FLAG_KEY_FRAME 32 +#define FLAG_PRED_KEY_FRAME 64 + +typedef struct { + uint8_t flags; + uint8_t stream_id_plus1; + uint8_t size_mul; + uint8_t size_lsb; +} FrameCode; + +typedef struct { + int last_key_frame; + int msb_timestamp_shift; + int rate_num; + int rate_den; + int64_t last_pts; + int64_t last_full_pts; + int lru_pts_delta[MAX_PTS_LRU]; + int lru_size[MAX_SIZE_LRU]; + int initial_pts_predictor[MAX_PTS_LRU]; + int initial_size_predictor[MAX_SIZE_LRU]; +} StreamContext; typedef struct { - int curr_frame_start; - int last_frame_size; - int curr_frame_size; - int *msb_timestamp_shift; - int64_t *last_msb_timestamp; + AVFormatContext *avf; + int64_t packet_start; + int64_t last_packet_start; + int written_packet_size; + int64_t packet_size_pos; + int64_t last_frame_start[3]; + FrameCode frame_code[256]; + StreamContext *stream; } NUTContext; +static void update_lru(int *lru, int current, int count){ + int i; + + for(i=0; istream[stream_index]; + + stream->last_key_frame= key_frame; + nut->last_frame_start[ frame_type ]= frame_start; + update_lru(stream->lru_pts_delta, pts - stream->last_pts, 3); + update_lru(stream->lru_size , size, 2); + stream->last_pts= pts; + if( nut->frame_code[frame_code].flags & FLAG_PTS + && nut->frame_code[frame_code].flags & FLAG_FULL_PTS) + stream->last_full_pts= pts; +} + +static void reset(AVFormatContext *s/*, int frame_type*/){ + NUTContext *nut = s->priv_data; + int i; + + for(i=0; inb_streams; i++){ + StreamContext *stream= &nut->stream[i]; + + stream->last_key_frame= 1; + memcpy(stream->lru_pts_delta, stream->initial_pts_predictor, sizeof(int)*MAX_PTS_LRU); + memcpy(stream->lru_size, stream->initial_size_predictor, sizeof(int)*MAX_SIZE_LRU); + } +} + +static void build_frame_code(AVFormatContext *s){ + NUTContext *nut = s->priv_data; + int key_frame, frame_type, full_pts, index, pred, stream_id; + int start=0; + int end= 255; + int keyframe_0_esc= s->nb_streams > 2; + + if(keyframe_0_esc){ + /* keyframe = 0 escapes, 3 codes */ + for(frame_type=0; frame_type<2; frame_type++){ + for(full_pts=frame_type; full_pts<2; full_pts++){ + FrameCode *ft= &nut->frame_code[start]; + ft->flags= FLAG_FRAME_TYPE*frame_type + FLAG_FULL_PTS*full_pts; + ft->flags|= FLAG_DATA_SIZE | FLAG_PTS; + ft->stream_id_plus1= 0; + ft->size_mul=1; + start++; + } + } + } + + for(stream_id= 0; stream_idnb_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; + + for(frame_type=0; frame_type<2; frame_type++){ + for(full_pts=frame_type; full_pts<2; full_pts++){ + FrameCode *ft= &nut->frame_code[start2]; + ft->flags= FLAG_FRAME_TYPE*frame_type + FLAG_FULL_PTS*full_pts + FLAG_KEY_FRAME*key_frame; + ft->flags|= FLAG_DATA_SIZE | FLAG_PTS; + ft->stream_id_plus1= stream_id + 1; + ft->size_mul=1; + 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); + for(pred=0; predframe_code[start2]; + ft->flags= FLAG_KEY_FRAME*key_frame + (FLAG_FULL_PTS+FLAG_PTS+FLAG_FRAME_TYPE)*frame_type; + ft->stream_id_plus1= stream_id + 1; + ft->size_mul=1; + ft->size_lsb=1 + pred; + start2++; + } + nut->stream[stream_id].initial_size_predictor[pred]= frame_bytes + pred; + } + }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; + start2++; + } +#endif + pred_count= 2 + codec->has_b_frames; + for(pred=0; predframe_code[index]; + ft->flags= FLAG_KEY_FRAME*key_frame + pred*4; + 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; + } + nut->stream[stream_id].initial_pts_predictor[pred]= pred+1; + } + } + memmove(&nut->frame_code['N'+1], &nut->frame_code['N'], sizeof(FrameCode)*(255-'N')); + nut->frame_code['N'].flags= 1; +} + static int bytes_left(ByteIOContext *bc) { return bc->buf_end - bc->buf_ptr; @@ -75,16 +245,6 @@ static uint64_t get_v(ByteIOContext *bc) return -1; } -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 int get_b(ByteIOContext *bc, char *data, int maxlen) { int i, len; @@ -111,15 +271,28 @@ static int get_bi(ByteIOContext *bc) return val; } -static int get_packetheader(NUTContext *nut, ByteIOContext *bc) +static int get_packetheader(NUTContext *nut, ByteIOContext *bc, int prefix_length) { - nut->curr_frame_start = url_ftell(bc); - nut->curr_frame_size = get_v(bc); - nut->last_frame_size = get_v(bc); - dprintf("Packet: fwd: %d bwd: %d\n", - nut->curr_frame_size, nut->last_frame_size); - - return 0; + int64_t start, size, last_size; + start= url_ftell(bc) - prefix_length; + + if(start != nut->packet_start + nut->written_packet_size){ + av_log(nut->avf, AV_LOG_ERROR, "get_packetheader called at weird position\n"); + return -1; + } + + size= get_v(bc); + last_size= get_v(bc); + if(nut->written_packet_size != last_size){ + av_log(nut->avf, AV_LOG_ERROR, "packet size missmatch %d != %lld at %lld\n", nut->written_packet_size, last_size, start); + return -1; + } + + nut->last_packet_start = nut->packet_start; + nut->packet_start = start; + nut->written_packet_size= size; + + return size; } /** @@ -139,7 +312,6 @@ static int get_length(uint64_t val){ static int put_v(ByteIOContext *bc, uint64_t val) { int i; - // if (bytes_left(s)*8 < 9) // return -1; @@ -158,14 +330,6 @@ static int put_v(ByteIOContext *bc, uint64_t val) return 0; } -static int put_s(ByteIOContext *bc, uint64_t val) -{ - if (val<=0) - return put_v(bc, -2*val); - else - return put_v(bc, 2*val-1); -} - static int put_b(ByteIOContext *bc, char *data, int len) { int i; @@ -187,35 +351,36 @@ static int put_bi(ByteIOContext *bc, int val) static int put_packetheader(NUTContext *nut, ByteIOContext *bc, int max_size) { put_flush_packet(bc); - nut->curr_frame_start = url_ftell(bc); - nut->curr_frame_size = max_size; - + nut->last_packet_start= nut->packet_start; + nut->packet_start+= nut->written_packet_size; + nut->packet_size_pos = url_ftell(bc); + nut->written_packet_size = max_size; + /* packet header */ - put_v(bc, nut->curr_frame_size); /* forward ptr */ - put_v(bc, nut->last_frame_size); /* backward ptr */ - dprintf("Packet: fwd: %d, bwd: %d\n", - nut->curr_frame_size, nut->last_frame_size); + put_v(bc, nut->written_packet_size); /* forward ptr */ + put_v(bc, nut->packet_start - nut->last_packet_start); /* backward ptr */ - nut->last_frame_size = nut->curr_frame_size; - return 0; } static int update_packetheader(NUTContext *nut, ByteIOContext *bc, int additional_size){ - offset_t start= nut->curr_frame_start; - offset_t cur= url_ftell(bc); + int64_t start= nut->packet_start; + int64_t cur= url_ftell(bc); int size= cur - start + additional_size; - assert( size <= nut->curr_frame_size ); + if(size != nut->written_packet_size){ + int i; + + assert( size <= nut->written_packet_size ); - url_fseek(bc, start, SEEK_SET); - put_v(bc, size); - if(get_length(size) < get_length(nut->curr_frame_size)) - put_byte(bc, 0x80); - nut->curr_frame_size= size; - dprintf("Packet update: size: %d\n", size); - - url_fseek(bc, cur, SEEK_SET); + url_fseek(bc, nut->packet_size_pos, 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 + } return 0; } @@ -225,26 +390,55 @@ static int nut_write_header(AVFormatContext *s) NUTContext *nut = s->priv_data; ByteIOContext *bc = &s->pb; AVCodecContext *codec; - int i; + int i, j; + nut->avf= s; + + nut->stream = + av_mallocz(sizeof(StreamContext)*s->nb_streams); + + av_set_pts_info(s, 60, 1, AV_TIME_BASE); + /* main header */ put_be64(bc, MAIN_STARTCODE); - put_packetheader(nut, bc, 120); - put_v(bc, 0); /* version */ + put_packetheader(nut, bc, 120+5*256); + put_v(bc, 1); /* version */ put_v(bc, s->nb_streams); + put_v(bc, 3); /* checksum threshold */ + + build_frame_code(s); + assert(nut->frame_code['N'].flags == 1); + for(i=0; i<256;){ + int tmp_flags = nut->frame_code[i].flags; + int tmp_stream= nut->frame_code[i].stream_id_plus1; + int tmp_mul = nut->frame_code[i].size_mul; + int tmp_size = nut->frame_code[i].size_lsb; + put_v(bc, tmp_flags); + put_v(bc, tmp_stream); + put_v(bc, tmp_mul); + put_v(bc, tmp_size); + + for(j=0; i<256; j++,i++){ + 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 ) break; + if(++tmp_size >= tmp_mul){ + tmp_size=0; + tmp_stream++; + } + } + put_v(bc, j); + } + put_be32(bc, 0); /* FIXME: checksum */ update_packetheader(nut, bc, 0); - nut->msb_timestamp_shift = - av_mallocz(sizeof(nut->msb_timestamp_shift)*s->nb_streams); - nut->last_msb_timestamp = - av_mallocz(sizeof(nut->last_msb_timestamp)*s->nb_streams); - /* stream headers */ for (i = 0; i < s->nb_streams; i++) { - int nom, denom; + int nom, denom, gcd; codec = &s->streams[i]->codec; @@ -272,38 +466,57 @@ static int nut_write_header(AVFormatContext *s) } else { - nom = codec->sample_rate/8; - denom = 8; + nom = codec->sample_rate; + if(codec->frame_size>0) + denom= codec->frame_size; + else + denom= 1; //unlucky } + gcd= ff_gcd(nom, denom); + nom /= gcd; + denom /= gcd; + nut->stream[i].rate_num= nom; + nut->stream[i].rate_den= denom; + put_v(bc, codec->bit_rate); put_v(bc, 0); /* no language code */ put_v(bc, nom); put_v(bc, denom); - nut->msb_timestamp_shift[i] = 0; - put_v(bc, nut->msb_timestamp_shift[i]); - put_v(bc, 0); /* shuffle type */ + 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); + for(j=0; j<3; j++) + put_v(bc, nut->stream[i].initial_pts_predictor[j]); + for(j=0; j<2; j++) + put_v(bc, nut->stream[i].initial_size_predictor[j]); put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */ - put_v(bc, 0); /* no codec specific headers */ + 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 * denom) / nom); put_v(bc, codec->channels); - put_be32(bc, 0); /* FIXME: checksum */ break; case CODEC_TYPE_VIDEO: put_v(bc, codec->width); put_v(bc, codec->height); - put_v(bc, 0); /* aspected w */ - put_v(bc, 0); /* aspected h */ + put_v(bc, codec->sample_aspect_ratio.num); + put_v(bc, codec->sample_aspect_ratio.den); put_v(bc, 0); /* csp type -- unknown */ - put_be32(bc, 0); /* FIXME: checksum */ break; default: break; } + put_be32(bc, 0); /* FIXME: checksum */ update_packetheader(nut, bc, 0); } @@ -351,52 +564,144 @@ static int nut_write_packet(AVFormatContext *s, int stream_index, const uint8_t *buf, int size, int64_t pts) { NUTContext *nut = s->priv_data; + StreamContext *stream= &nut->stream[stream_index]; ByteIOContext *bc = &s->pb; - int key_frame = 0, flags, msb_pts = 0; + int key_frame = 0, full_pts=0; AVCodecContext *enc; - int64_t lsb_pts; + int64_t lsb_pts, delta_pts; + int frame_type, best_length, frame_code, flags, i, size_mul, size_lsb; + const int64_t frame_start= url_ftell(bc); if (stream_index > s->nb_streams) return 1; + + pts= (av_rescale(pts, stream->rate_num, stream->rate_den) + AV_TIME_BASE/2) / AV_TIME_BASE; enc = &s->streams[stream_index]->codec; - // FIXME, lavc reports always keyframes for audio, which will make - // _huge_ overhead - if (enc->codec_type == CODEC_TYPE_VIDEO) - key_frame = enc->coded_frame->key_frame; - - if (key_frame /*|| - ((pts - (nut->last_msb_timestamp[stream_index] << - nut->msb_timestamp_shift[stream_index])) > 1024)*/) - { - msb_pts = 1; - nut->last_msb_timestamp[stream_index] = pts >> nut->msb_timestamp_shift[stream_index]; + key_frame = enc->coded_frame->key_frame; + delta_pts= pts - stream->last_pts; + + frame_type=0; + if(frame_start + size + 20 - FFMAX(nut->last_frame_start[1], nut->last_frame_start[2]) > MAX_TYPE1_DISTANCE) + frame_type=1; + if(key_frame){ + if(frame_type==1 && frame_start + size - nut->last_frame_start[2] > MAX_TYPE2_DISTANCE) + frame_type=2; + if(!stream->last_key_frame) + frame_type=2; } - lsb_pts = pts - (nut->last_msb_timestamp[stream_index] << nut->msb_timestamp_shift[stream_index]); - - flags=0; - flags<<=2; flags|=1; //priority - flags<<=1; flags|=0; //checksum - flags<<=1; flags|=msb_pts; //msb_timestamp_flag - flags<<=2; flags|=1; //subpacket_type - flags<<=1; flags|=0; //reserved + if(frame_type>0){ + update_packetheader(nut, bc, 0); + reset(s); + full_pts=1; + } + //FIXME ensure that the timestamp can be represented by either delta or lsb or full_pts=1 + + lsb_pts = pts & ((1 << stream->msb_timestamp_shift)-1); + + 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= stream->last_key_frame; + int length=0; + size_mul= nut->frame_code[i].size_mul; + size_lsb= nut->frame_code[i].size_lsb; + flags= nut->frame_code[i].flags; + + if(stream_id_plus1 == 0) length+= get_length(stream_index); + else if(stream_id_plus1 - 1 != stream_index) + continue; + if(flags & FLAG_PRED_KEY_FRAME){ + if(flags & FLAG_KEY_FRAME) + fc_key_frame= !fc_key_frame; + }else{ + fc_key_frame= !!(flags & FLAG_KEY_FRAME); + } + assert(key_frame==0 || key_frame==1); + if(fc_key_frame != key_frame) + continue; + + if((!!(flags & FLAG_FRAME_TYPE)) != (frame_type > 0)) + continue; + + if(size_mul <= size_lsb){ + int p= stream->lru_size[size_lsb - size_mul]; + if(p != size) + continue; + }else{ + if(size % size_mul != size_lsb) + continue; + if(flags & FLAG_DATA_SIZE) + length += get_length(size / size_mul); + else if(size/size_mul) + continue; + } + + if(full_pts != ((flags & FLAG_PTS) && (flags & FLAG_FULL_PTS))) + continue; + + if(flags&FLAG_PTS){ + if(flags&FLAG_FULL_PTS){ + length += get_length(pts); + }else{ + length += get_length(lsb_pts); + } + }else{ + int delta= stream->lru_pts_delta[(flags & 12)>>2]; + if(delta != pts - stream->last_pts) + continue; + assert(frame_type == 0); + } + + 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); + } - if (key_frame) + 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; +#if 0 + best_length /= 7; + best_length ++; //frame_code + if(frame_type>0){ + best_length += 4; //packet header + if(frame_type>1) + 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\n", key_frame, frame_type, full_pts ? 2 : ((flags & FLAG_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)); +#endif + + if (frame_type==2) put_be64(bc, KEYFRAME_STARTCODE); - put_byte(bc, flags); - - put_packetheader(nut, bc, size+20); - put_v(bc, stream_index); - if (msb_pts) - put_v(bc, nut->last_msb_timestamp[stream_index]); - put_v(bc, lsb_pts); /* lsb_timestamp */ - update_packetheader(nut, bc, size); + put_byte(bc, frame_code); + + if(frame_type>0) + put_packetheader(nut, bc, FFMAX(size+20, MAX_TYPE1_DISTANCE)); + if(nut->frame_code[frame_code].stream_id_plus1 == 0) + put_v(bc, stream_index); + if (flags & FLAG_PTS){ + if (flags & FLAG_FULL_PTS) + put_v(bc, pts); + else + put_v(bc, lsb_pts); + } + if(flags & FLAG_DATA_SIZE) + put_v(bc, size / size_mul); + if(size > MAX_TYPE1_DISTANCE){ + assert(frame_type > 0); + update_packetheader(nut, bc, size); + } put_buffer(bc, buf, size); - - put_flush_packet(bc); + update(nut, stream_index, frame_start, frame_type, frame_code, key_frame, size, pts); + return 0; } @@ -404,6 +709,9 @@ static int nut_write_trailer(AVFormatContext *s) { NUTContext *nut = s->priv_data; ByteIOContext *bc = &s->pb; + + update_packetheader(nut, bc, 0); + #if 0 int i; @@ -422,10 +730,7 @@ static int nut_write_trailer(AVFormatContext *s) put_flush_packet(bc); - if (nut->last_msb_timestamp) - av_free(nut->last_msb_timestamp); - if (nut->msb_timestamp_shift) - av_free(nut->msb_timestamp_shift); + av_freep(&nut->stream); return 0; } @@ -451,27 +756,74 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap) NUTContext *nut = s->priv_data; ByteIOContext *bc = &s->pb; uint64_t tmp; - int cur_stream, nb_streams; + int cur_stream, nb_streams, i, j; + + nut->avf= s; + av_set_pts_info(s, 60, 1, AV_TIME_BASE); + /* main header */ tmp = get_be64(bc); if (tmp != MAIN_STARTCODE) av_log(s, AV_LOG_ERROR, "damaged? startcode!=1 (%Ld)\n", tmp); - get_packetheader(nut, bc); + get_packetheader(nut, bc, 8); tmp = get_v(bc); - if (tmp != 0) + if (tmp != 1) av_log(s, AV_LOG_ERROR, "bad version (%Ld)\n", tmp); nb_streams = get_v(bc); + get_v(bc); //checksum threshold + + for(i=0; i<256;){ + int tmp_flags = get_v(bc); + int tmp_stream= get_v(bc); + int tmp_mul = get_v(bc); + int tmp_size = get_v(bc); + int count = 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_flags & FLAG_FRAME_TYPE) && tmp_flags != 1){ + if(tmp_flags & FLAG_PRED_KEY_FRAME){ + av_log(s, AV_LOG_ERROR, "keyframe prediction in non 0 frame type\n"); + return -1; + } + if(!(tmp_flags & FLAG_PTS) || !(tmp_flags & FLAG_FULL_PTS) ){ + av_log(s, AV_LOG_ERROR, "no full pts in non 0 frame type\n"); + return -1; + } + } + + for(j=0; j nb_streams + 1){ + av_log(s, AV_LOG_ERROR, "illegal stream number\n"); + return -1; + } + + nut->frame_code[i].flags = tmp_flags ; + 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 ; + if(++tmp_size >= tmp_mul){ + tmp_size=0; + tmp_stream++; + } + } + } + if(nut->frame_code['N'].flags != 1){ + av_log(s, AV_LOG_ERROR, "illegal frame_code table\n"); + return -1; + } + get_be32(bc); /* checkusm */ s->bit_rate = 0; - nut->msb_timestamp_shift = - av_malloc(sizeof(nut->msb_timestamp_shift)*s->nb_streams); - nut->last_msb_timestamp = - av_malloc(sizeof(nut->last_msb_timestamp)*s->nb_streams); + nut->stream = av_malloc(sizeof(StreamContext)*nb_streams); /* stream header */ for (cur_stream = 0; cur_stream < nb_streams; cur_stream++) @@ -482,7 +834,7 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap) tmp = get_be64(bc); if (tmp != STREAM_STARTCODE) av_log(s, AV_LOG_ERROR, "damaged? startcode!=1 (%Ld)\n", tmp); - get_packetheader(nut, bc); + get_packetheader(nut, bc, 8); st = av_new_stream(s, get_v(bc)); if (!st) return AVERROR_NOMEM; @@ -510,22 +862,28 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap) get_b(bc, NULL, 0); /* language code */ nom = get_v(bc); denom = get_v(bc); - nut->msb_timestamp_shift[cur_stream] = get_v(bc); - get_v(bc); /* shuffle type */ + nut->stream[cur_stream].msb_timestamp_shift = get_v(bc); + for(i=0; i<3; i++) + nut->stream[cur_stream].initial_pts_predictor[i]= get_v(bc); + for(i=0; i<2; i++) + nut->stream[cur_stream].initial_size_predictor[i]= get_v(bc); get_byte(bc); /* flags */ /* codec specific data headers */ - while(get_v(bc) != 0) - url_fskip(bc, get_v(bc)); + while(get_v(bc) != 0){ + st->codec.extradata_size= get_v(bc); + st->codec.extradata= av_mallocz(st->codec.extradata_size); + get_buffer(bc, st->codec.extradata, st->codec.extradata_size); +// url_fskip(bc, get_v(bc)); + } if (class == 0) /* VIDEO */ { st->codec.width = get_v(bc); st->codec.height = get_v(bc); - get_v(bc); /* aspected w */ - get_v(bc); /* aspected h */ + st->codec.sample_aspect_ratio.num= get_v(bc); + st->codec.sample_aspect_ratio.den= get_v(bc); get_v(bc); /* csp type */ - get_be32(bc); /* checksum */ st->codec.frame_rate = nom; st->codec.frame_rate_base = denom; @@ -534,8 +892,10 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap) { st->codec.sample_rate = (get_v(bc) * nom) / denom; st->codec.channels = get_v(bc); - get_be32(bc); /* checksum */ } + get_be32(bc); /* checksum */ + nut->stream[cur_stream].rate_num= nom; + nut->stream[cur_stream].rate_den= denom; } return 0; @@ -544,51 +904,107 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap) static int nut_read_packet(AVFormatContext *s, AVPacket *pkt) { NUTContext *nut = s->priv_data; + StreamContext *stream; ByteIOContext *bc = &s->pb; - int id, size; + int size, frame_code, flags, size_mul, size_lsb, stream_id; int key_frame = 0; - uint64_t tmp; + int frame_type= 0; int64_t pts = 0; + const int64_t frame_start= url_ftell(bc); if (url_feof(bc)) return -1; - tmp = get_byte(bc); - if (tmp & 0x80) /* zero bit set? */ - { + frame_code = get_byte(bc); + if(frame_code == 'N'){ + uint64_t tmp= frame_code; tmp<<=8 ; tmp |= get_byte(bc); tmp<<=16; tmp |= get_be16(bc); tmp<<=32; tmp |= get_be32(bc); if (tmp == KEYFRAME_STARTCODE) { - key_frame = 1; - tmp = get_byte(bc); /* flags */ + frame_code = get_byte(bc); + frame_type = 2; } else av_log(s, AV_LOG_ERROR, "error in zero bit / startcode %LX\n", tmp); } - get_packetheader(nut, bc); -#if 0 - if (((tmp & 0x60)>>5) > 3) /* priority <= 3 */ - av_log(s, AV_LOG_ERROR, "sanity check failed!\n"); -#endif - id = get_v(bc); - if ((tmp & 0x8) >> 3) - pts = get_v(bc) << nut->msb_timestamp_shift[id]; - pts += get_v(bc); - - size = (nut->curr_frame_size - (url_ftell(bc)-nut->curr_frame_start)); - dprintf("flags: 0x%llx, timestamp: %llx, packet size: %d\n", tmp, pts, size); + 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; + + if(flags & FLAG_FRAME_TYPE){ + reset(s); + if(frame_type==2){ + get_packetheader(nut, bc, 8+1); + }else{ + get_packetheader(nut, bc, 1); + frame_type= 1; + } + } + + 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]; - if (size < 0) - return -1; + if(flags & FLAG_PRED_KEY_FRAME){ + if(flags & FLAG_KEY_FRAME) + key_frame= !stream->last_key_frame; + else + key_frame= stream->last_key_frame; + }else{ + key_frame= !!(flags & FLAG_KEY_FRAME); + } + if(flags & FLAG_PTS){ + if(flags & FLAG_FULL_PTS){ + pts= get_v(bc); + }else{ + int64_t mask = (1<msb_timestamp_shift)-1; + int64_t delta= stream->last_pts - mask/2; + pts= ((get_v(bc) - delta)&mask) + delta; + } + }else{ + pts= stream->last_pts + stream->lru_pts_delta[(flags&12)>>2]; + } + + if(size_mul <= size_lsb){ + size= stream->lru_size[size_lsb - size_mul]; + }else{ + if(flags & FLAG_DATA_SIZE) + size= size_mul*get_v(bc) + size_lsb; + else + size= size_lsb; + } + +//av_log(s, AV_LOG_DEBUG, "fs:%lld fc:%d ft:%d kf:%d pts:%lld\n", frame_start, frame_code, frame_type, key_frame, pts); + av_new_packet(pkt, size); get_buffer(bc, pkt->data, size); - pkt->stream_index = id; + pkt->stream_index = stream_id; if (key_frame) pkt->flags |= PKT_FLAG_KEY; - pkt->pts = pts; + pkt->pts = pts * AV_TIME_BASE * stream->rate_den / stream->rate_num; + + update(nut, stream_id, frame_start, frame_type, frame_code, key_frame, size, pts); + + return 0; +} + +static int nut_read_close(AVFormatContext *s) +{ + NUTContext *nut = s->priv_data; + int i; + + for(i=0;inb_streams;i++) { + av_freep(&s->streams[i]->codec.extradata); + } + av_freep(&nut->stream); return 0; } @@ -600,7 +1016,7 @@ static AVInputFormat nut_iformat = { nut_probe, nut_read_header, nut_read_packet, -// nut_read_close, + nut_read_close, // nut_read_seek, .extensions = "nut", }; @@ -612,7 +1028,7 @@ static AVOutputFormat nut_oformat = { "video/x-nut", "nut", sizeof(NUTContext), -#ifdef CONFIG_VORBIS +#if 0 //#ifdef CONFIG_VORBIS CODEC_ID_VORBIS, #elif defined(CONFIG_MP3LAME) CODEC_ID_MP3, -- 2.7.4