diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/nutenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/nutenc.c | 775 |
1 files changed, 0 insertions, 775 deletions
diff --git a/contrib/ffmpeg/libavformat/nutenc.c b/contrib/ffmpeg/libavformat/nutenc.c deleted file mode 100644 index 5c0975c28..000000000 --- a/contrib/ffmpeg/libavformat/nutenc.c +++ /dev/null @@ -1,775 +0,0 @@ -/* - * nut muxer - * Copyright (c) 2004-2007 Michael Niedermayer - * - * 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 - */ - -#include "nut.h" -#include "tree.h" -#include "mpegaudiodata.h" - -static int find_expected_header(AVCodecContext *c, int size, int key_frame, uint8_t out[64]){ - int sample_rate= c->sample_rate; - - if(size>4096) - return 0; - - AV_WB24(out, 1); - - if(c->codec_id == CODEC_ID_MPEG4){ - if(key_frame){ - return 3; - }else{ - out[3]= 0xB6; - return 4; - } - }else if(c->codec_id == CODEC_ID_MPEG1VIDEO || c->codec_id == CODEC_ID_MPEG2VIDEO){ - return 3; - }else if(c->codec_id == CODEC_ID_H264){ - return 3; - }else if(c->codec_id == CODEC_ID_MP3 || c->codec_id == CODEC_ID_MP2){ - int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size; - int layer= c->codec_id == CODEC_ID_MP3 ? 3 : 2; - unsigned int header= 0xFFF00000; - - lsf = sample_rate < (24000+32000)/2; - mpeg25 = sample_rate < (12000+16000)/2; - sample_rate <<= lsf + mpeg25; - if (sample_rate < (32000 + 44100)/2) sample_rate_index=2; - else if(sample_rate < (44100 + 48000)/2) sample_rate_index=0; - else sample_rate_index=1; - - sample_rate= ff_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25); - - for(bitrate_index=2; bitrate_index<30; bitrate_index++){ - frame_size = ff_mpa_bitrate_tab[lsf][layer-1][bitrate_index>>1]; - frame_size = (frame_size * 144000) / (sample_rate << lsf) + (bitrate_index&1); - - if(frame_size == size) - break; - } - - header |= (!lsf)<<19; - header |= (4-layer)<<17; - header |= 1<<16; //no crc - AV_WB32(out, header); - if(size <= 0) - return 2; //we guess theres no crc, if there is one the user clearly doesnt care about overhead - if(bitrate_index == 30) - return -1; //something is wrong ... - - header |= (bitrate_index>>1)<<12; - header |= sample_rate_index<<10; - header |= (bitrate_index&1)<<9; - - return 2; //FIXME actually put the needed ones in build_elision_headers() - return 3; //we guess that the private bit isnt set -//FIXME the above asumtations should be checked, if these turn out false too often something should be done - } - return 0; -} - -static int find_header_idx(AVFormatContext *s, AVCodecContext *c, int size, int frame_type){ - NUTContext *nut = s->priv_data; - uint8_t out[64]; - int i; - int len= find_expected_header(c, size, frame_type, out); - -//av_log(NULL, AV_LOG_ERROR, "expected_h len=%d size=%d codec_id=%d\n", len, size, c->codec_id); - - for(i=1; i<nut->header_count; i++){ - if( len == nut->header_len[i] - && !memcmp(out, nut->header[i], len)){ -// av_log(NULL, AV_LOG_ERROR, "found %d\n", i); - return i; - } - } -// av_log(NULL, AV_LOG_ERROR, "nothing found\n"); - return 0; -} - -static void build_elision_headers(AVFormatContext *s){ - NUTContext *nut = s->priv_data; - int i; - //FIXME this is lame - //FIXME write a 2pass mode to find the maximal headers - const static uint8_t headers[][5]={ - {3, 0x00, 0x00, 0x01}, - {4, 0x00, 0x00, 0x01, 0xB6}, - {2, 0xFF, 0xFA}, //mp3+crc - {2, 0xFF, 0xFB}, //mp3 - {2, 0xFF, 0xFC}, //mp2+crc - {2, 0xFF, 0xFD}, //mp2 - }; - - nut->header_count= 7; - for(i=1; i<nut->header_count; i++){ - nut->header_len[i]= headers[i-1][0]; - nut->header [i]= &headers[i-1][1]; - } -} - -static void build_frame_code(AVFormatContext *s){ - NUTContext *nut = s->priv_data; - int key_frame, index, pred, stream_id; - int start=1; - int end= 254; - int keyframe_0_esc= s->nb_streams > 2; - int pred_table[10]; - FrameCode *ft; - - ft= &nut->frame_code[start]; - ft->flags= FLAG_CODED; - ft->size_mul=1; - ft->pts_delta=1; - start++; - - if(keyframe_0_esc){ - /* keyframe = 0 escape */ - FrameCode *ft= &nut->frame_code[start]; - ft->flags= FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS; - ft->size_mul=1; - 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*key_frame; - ft->flags|= FLAG_SIZE_MSB | FLAG_CODED_PTS; - ft->stream_id= stream_id; - ft->size_mul=1; - if(is_audio) - ft->header_idx= find_header_idx(s, codec, -1, key_frame); - 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*key_frame; - ft->stream_id= stream_id; - ft->size_mul=frame_bytes + 2; - ft->size_lsb=frame_bytes + pred; - ft->pts_delta=pts; - ft->header_idx= find_header_idx(s, codec, frame_bytes + pred, key_frame); - start2++; - } - } - }else{ - FrameCode *ft= &nut->frame_code[start2]; - ft->flags= FLAG_KEY | FLAG_SIZE_MSB; - ft->stream_id= stream_id; - ft->size_mul=1; - ft->pts_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*key_frame; - ft->flags|= FLAG_SIZE_MSB; - ft->stream_id= stream_id; -//FIXME use single byte size and pred from last - ft->size_mul= end3-start3; - ft->size_lsb= index - start3; - ft->pts_delta= pred_table[pred]; - if(is_audio) - ft->header_idx= find_header_idx(s, codec, -1, key_frame); - } - } - } - memmove(&nut->frame_code['N'+1], &nut->frame_code['N'], sizeof(FrameCode)*(255-'N')); - nut->frame_code[ 0].flags= - nut->frame_code[255].flags= - nut->frame_code['N'].flags= FLAG_INVALID; -} - -/** - * Gets the length in bytes which is needed to store val as v. - */ -static int get_length(uint64_t val){ - int i=1; - - while(val>>=7) - i++; - - return i; -} - -static void put_v(ByteIOContext *bc, uint64_t val){ - int i= get_length(val); - - while(--i>0) - put_byte(bc, 128 | (val>>(7*i))); - - put_byte(bc, val&127); -} - -static void put_t(NUTContext *nut, StreamContext *nus, ByteIOContext *bc, uint64_t val){ - val *= nut->time_base_count; - val += nus->time_base - nut->time_base; - put_v(bc, val); -} - -/** - * 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){ - put_v(bc, 2*FFABS(val) - (val>0)); -} - -#ifdef TRACE -static inline void put_v_trace(ByteIOContext *bc, uint64_t v, char *file, char *func, int line){ - av_log(NULL, AV_LOG_DEBUG, "put_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){ - av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line); - - put_s(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__) -#endif - -//FIXME remove calculate_checksum -static void put_packet(NUTContext *nut, ByteIOContext *bc, ByteIOContext *dyn_bc, int calculate_checksum, uint64_t startcode){ - uint8_t *dyn_buf=NULL; - int dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf); - int forw_ptr= dyn_size + 4*calculate_checksum; - - if(forw_ptr > 4096) - init_checksum(bc, ff_crc04C11DB7_update, 0); - put_be64(bc, startcode); - put_v(bc, forw_ptr); - if(forw_ptr > 4096) - put_le32(bc, get_checksum(bc)); - - if(calculate_checksum) - init_checksum(bc, ff_crc04C11DB7_update, 0); - put_buffer(bc, dyn_buf, dyn_size); - if(calculate_checksum) - put_le32(bc, get_checksum(bc)); - - av_free(dyn_buf); -} - -static void write_mainheader(NUTContext *nut, ByteIOContext *bc){ - int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields, tmp_head_idx; - int64_t tmp_match; - - put_v(bc, 3); /* version */ - put_v(bc, nut->avf->nb_streams); - put_v(bc, nut->max_distance); - put_v(bc, nut->time_base_count); - - for(i=0; i<nut->time_base_count; i++){ - put_v(bc, nut->time_base[i].num); - put_v(bc, nut->time_base[i].den); - } - - tmp_pts=0; - tmp_mul=1; - tmp_stream=0; - tmp_match= 1-(1LL<<62); - tmp_head_idx= 0; - for(i=0; i<256;){ - tmp_fields=0; - tmp_size=0; -// tmp_res=0; - if(tmp_pts != nut->frame_code[i].pts_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) 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; - if(tmp_head_idx!=nut->frame_code[i].header_idx)tmp_fields=8; - - tmp_pts = nut->frame_code[i].pts_delta; - tmp_flags = nut->frame_code[i].flags; - tmp_stream= nut->frame_code[i].stream_id; - tmp_mul = nut->frame_code[i].size_mul; - tmp_size = nut->frame_code[i].size_lsb; -// tmp_res = nut->frame_code[i].res; - tmp_head_idx= nut->frame_code[i].header_idx; - - for(j=0; i<256; j++,i++){ - if(i == 'N'){ - j--; - continue; - } - if(nut->frame_code[i].pts_delta != tmp_pts ) break; - if(nut->frame_code[i].flags != tmp_flags ) break; - if(nut->frame_code[i].stream_id != 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(nut->frame_code[i].header_idx!= tmp_head_idx) 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_pts); - 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); - if(tmp_fields>6) put_v(bc, tmp_match); - if(tmp_fields>7) put_v(bc, tmp_head_idx); - } - put_v(bc, nut->header_count-1); - for(i=1; i<nut->header_count; i++){ - put_v(bc, nut->header_len[i]); - put_buffer(bc, nut->header[i], nut->header_len[i]); - } -} - -static int write_streamheader(NUTContext *nut, ByteIOContext *bc, AVCodecContext *codec, int i){ - put_v(bc, i); - 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; - default : put_v(bc, 3); break; - } - put_v(bc, 4); - if (codec->codec_tag){ - put_le32(bc, codec->codec_tag); - }else - return -1; - - put_v(bc, nut->stream[i].time_base - nut->time_base); - put_v(bc, nut->stream[i].msb_pts_shift); - put_v(bc, nut->stream[i].max_pts_distance); - put_v(bc, codec->has_b_frames); - put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */ - - put_v(bc, codec->extradata_size); - put_buffer(bc, codec->extradata, codec->extradata_size); - - 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); - - if(codec->sample_aspect_ratio.num<=0 || codec->sample_aspect_ratio.den<=0){ - put_v(bc, 0); - put_v(bc, 0); - }else{ - 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; - } - return 0; -} - -static int add_info(ByteIOContext *bc, const char *type, const char *value){ - put_str(bc, type); - put_s(bc, -1); - put_str(bc, value); - return 1; -} - -static int write_globalinfo(NUTContext *nut, ByteIOContext *bc){ - AVFormatContext *s= nut->avf; - ByteIOContext *dyn_bc; - uint8_t *dyn_buf=NULL; - int count=0, dyn_size; - int ret = url_open_dyn_buf(&dyn_bc); - if(ret < 0) - return ret; - - if(s->title [0]) count+= add_info(dyn_bc, "Title" , s->title); - if(s->author [0]) count+= add_info(dyn_bc, "Author" , s->author); - if(s->copyright[0]) count+= add_info(dyn_bc, "Copyright", s->copyright); - if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) - count+= add_info(dyn_bc, "Encoder" , LIBAVFORMAT_IDENT); - - put_v(bc, 0); //stream_if_plus1 - put_v(bc, 0); //chapter_id - put_v(bc, 0); //timestamp_start - put_v(bc, 0); //length - - put_v(bc, count); - - dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf); - put_buffer(bc, dyn_buf, dyn_size); - av_free(dyn_buf); - return 0; -} - -static int write_headers(NUTContext *nut, ByteIOContext *bc){ - ByteIOContext *dyn_bc; - int i, ret; - - ret = url_open_dyn_buf(&dyn_bc); - if(ret < 0) - return ret; - write_mainheader(nut, dyn_bc); - put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE); - - for (i=0; i < nut->avf->nb_streams; i++){ - AVCodecContext *codec = nut->avf->streams[i]->codec; - - ret = url_open_dyn_buf(&dyn_bc); - if(ret < 0) - return ret; - write_streamheader(nut, dyn_bc, codec, i); - put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE); - } - - ret = url_open_dyn_buf(&dyn_bc); - if(ret < 0) - return ret; - write_globalinfo(nut, dyn_bc); - put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); - - nut->last_syncpoint_pos= INT_MIN; - nut->header_count++; - return 0; -} - -static int write_header(AVFormatContext *s){ - NUTContext *nut = s->priv_data; - ByteIOContext *bc = s->pb; - int i, j; - - nut->avf= s; - - nut->stream = av_mallocz(sizeof(StreamContext)*s->nb_streams); - nut->time_base= av_mallocz(sizeof(AVRational )*s->nb_streams); - - for(i=0; i<s->nb_streams; i++){ - AVStream *st= s->streams[i]; - int ssize; - AVRational time_base; - ff_parse_specific_params(st->codec, &time_base.den, &ssize, &time_base.num); - - av_set_pts_info(st, 64, time_base.num, time_base.den); - - for(j=0; j<nut->time_base_count; j++){ - if(!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))){ - break; - } - } - nut->time_base[j]= time_base; - nut->stream[i].time_base= &nut->time_base[j]; - if(j==nut->time_base_count) - nut->time_base_count++; - - if(av_q2d(time_base) >= 0.001) - nut->stream[i].msb_pts_shift = 7; - else - nut->stream[i].msb_pts_shift = 14; - nut->stream[i].max_pts_distance= FFMAX(1/av_q2d(time_base), 1); - } - - nut->max_distance = MAX_DISTANCE; - build_elision_headers(s); - build_frame_code(s); - assert(nut->frame_code['N'].flags == FLAG_INVALID); - - put_buffer(bc, ID_STRING, strlen(ID_STRING)); - put_byte(bc, 0); - - write_headers(nut, bc); - - put_flush_packet(bc); - - //FIXME index - - return 0; -} - -static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, AVPacket *pkt){ - int flags= 0; - - if(pkt->flags & PKT_FLAG_KEY ) flags |= FLAG_KEY; - if(pkt->stream_index != fc->stream_id ) flags |= FLAG_STREAM_ID; - if(pkt->size / fc->size_mul ) flags |= FLAG_SIZE_MSB; - if(pkt->pts - nus->last_pts != fc->pts_delta) flags |= FLAG_CODED_PTS; - if(pkt->size > 2*nut->max_distance ) flags |= FLAG_CHECKSUM; - if(FFABS(pkt->pts - nus->last_pts) - > nus->max_pts_distance) flags |= FLAG_CHECKSUM; - if( pkt->size < nut->header_len[fc->header_idx] - || (pkt->size > 4096 && fc->header_idx) - || memcmp(pkt->data, nut->header[fc->header_idx], nut->header_len[fc->header_idx])) - flags |= FLAG_HEADER_IDX; - - return flags | (fc->flags & FLAG_CODED); -} - -static int find_best_header_idx(NUTContext *nut, AVPacket *pkt){ - int i; - int best_i = 0; - int best_len= 0; - - if(pkt->size > 4096) - return 0; - - for(i=1; i<nut->header_count; i++){ - if( pkt->size >= nut->header_len[i] - && nut->header_len[i] > best_len - && !memcmp(pkt->data, nut->header[i], nut->header_len[i])){ - best_i= i; - best_len= nut->header_len[i]; - } - } - return best_i; -} - -static int write_packet(AVFormatContext *s, AVPacket *pkt){ - NUTContext *nut = s->priv_data; - StreamContext *nus= &nut->stream[pkt->stream_index]; - ByteIOContext *bc = s->pb, *dyn_bc; - FrameCode *fc; - int64_t coded_pts; - int best_length, frame_code, flags, needed_flags, i, header_idx, best_header_idx; - int key_frame = !!(pkt->flags & PKT_FLAG_KEY); - int store_sp=0; - int ret; - - if(1LL<<(20+3*nut->header_count) <= url_ftell(bc)) - write_headers(nut, bc); - - if(key_frame && !(nus->last_flags & FLAG_KEY)) - store_sp= 1; - - if(pkt->size + 30/*FIXME check*/ + url_ftell(bc) >= nut->last_syncpoint_pos + nut->max_distance) - store_sp= 1; - -//FIXME: Ensure store_sp is 1 in the first place. - - if(store_sp){ - syncpoint_t *sp, dummy= {.pos= INT64_MAX}; - - ff_nut_reset_ts(nut, *nus->time_base, pkt->dts); - for(i=0; i<s->nb_streams; i++){ - AVStream *st= s->streams[i]; - int64_t dts_tb = av_rescale_rnd(pkt->dts, - nus->time_base->num * (int64_t)nut->stream[i].time_base->den, - nus->time_base->den * (int64_t)nut->stream[i].time_base->num, - AV_ROUND_DOWN); - int index= av_index_search_timestamp(st, dts_tb, AVSEEK_FLAG_BACKWARD); - if(index>=0) dummy.pos= FFMIN(dummy.pos, st->index_entries[index].pos); - } - if(dummy.pos == INT64_MAX) - dummy.pos= 0; - sp= av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, NULL); - - nut->last_syncpoint_pos= url_ftell(bc); - ret = url_open_dyn_buf(&dyn_bc); - if(ret < 0) - return ret; - put_t(nut, nus, dyn_bc, pkt->dts); - put_v(dyn_bc, sp ? (nut->last_syncpoint_pos - sp->pos)>>4 : 0); - put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE); - - ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0/*unused*/, pkt->dts); - } - assert(nus->last_pts != AV_NOPTS_VALUE); - - coded_pts = pkt->pts & ((1<<nus->msb_pts_shift)-1); - if(ff_lsb2full(nus, coded_pts) != pkt->pts) - coded_pts= pkt->pts + (1<<nus->msb_pts_shift); - - best_header_idx= find_best_header_idx(nut, pkt); - - best_length=INT_MAX; - frame_code= -1; - for(i=0; i<256; i++){ - int length= 0; - FrameCode *fc= &nut->frame_code[i]; - int flags= fc->flags; - - if(flags & FLAG_INVALID) - continue; - needed_flags= get_needed_flags(nut, nus, fc, pkt); - - if(flags & FLAG_CODED){ - length++; - flags = needed_flags; - } - - if((flags & needed_flags) != needed_flags) - continue; - - if((flags ^ needed_flags) & FLAG_KEY) - continue; - - if(flags & FLAG_STREAM_ID) - length+= get_length(pkt->stream_index); - - if(pkt->size % fc->size_mul != fc->size_lsb) - continue; - if(flags & FLAG_SIZE_MSB) - length += get_length(pkt->size / fc->size_mul); - - if(flags & FLAG_CHECKSUM) - length+=4; - - if(flags & FLAG_CODED_PTS) - length += get_length(coded_pts); - - if( (flags & FLAG_CODED) - && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx]+1){ - flags |= FLAG_HEADER_IDX; - } - - if(flags & FLAG_HEADER_IDX){ - length += 1 - nut->header_len[best_header_idx]; - }else{ - length -= nut->header_len[fc->header_idx]; - } - - length*=4; - length+= !(flags & FLAG_CODED_PTS); - length+= !(flags & FLAG_CHECKSUM); - - if(length < best_length){ - best_length= length; - frame_code=i; - } - } - assert(frame_code != -1); - fc= &nut->frame_code[frame_code]; - flags= fc->flags; - needed_flags= get_needed_flags(nut, nus, fc, pkt); - header_idx= fc->header_idx; - - init_checksum(bc, ff_crc04C11DB7_update, 0); - put_byte(bc, frame_code); - if(flags & FLAG_CODED){ - put_v(bc, (flags^needed_flags) & ~(FLAG_CODED)); - flags = needed_flags; - } - if(flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index); - if(flags & FLAG_CODED_PTS) put_v(bc, coded_pts); - if(flags & FLAG_SIZE_MSB) put_v(bc, pkt->size / fc->size_mul); - if(flags & FLAG_HEADER_IDX) put_v(bc, header_idx= best_header_idx); - - if(flags & FLAG_CHECKSUM) put_le32(bc, get_checksum(bc)); - else get_checksum(bc); - - put_buffer(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]); - nus->last_flags= flags; - nus->last_pts= pkt->pts; - - //FIXME just store one per syncpoint - if(flags & FLAG_KEY) - av_add_index_entry( - s->streams[pkt->stream_index], - nut->last_syncpoint_pos, - pkt->pts, - 0, - 0, - AVINDEX_KEYFRAME); - - return 0; -} - -static int write_trailer(AVFormatContext *s){ - NUTContext *nut= s->priv_data; - ByteIOContext *bc= s->pb; - - while(nut->header_count<3) - write_headers(nut, bc); - put_flush_packet(bc); - - return 0; -} - -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, - write_header, - write_packet, - write_trailer, - .flags = AVFMT_GLOBALHEADER, - .codec_tag= (const AVCodecTag*[]){codec_bmp_tags, codec_wav_tags, 0}, -}; |