| /* |
| * 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 <stdint.h> |
| |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/tree.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/time.h" |
| #include "libavutil/opt.h" |
| #include "libavcodec/bytestream.h" |
| #include "libavcodec/mpegaudiodata.h" |
| #include "nut.h" |
| #include "internal.h" |
| #include "avio_internal.h" |
| #include "riff.h" |
| |
| static int find_expected_header(AVCodecParameters *p, int size, int key_frame, |
| uint8_t out[64]) |
| { |
| int sample_rate = p->sample_rate; |
| |
| if (size > 4096) |
| return 0; |
| |
| AV_WB24(out, 1); |
| |
| if (p->codec_id == AV_CODEC_ID_MPEG4) { |
| if (key_frame) { |
| return 3; |
| } else { |
| out[3] = 0xB6; |
| return 4; |
| } |
| } else if (p->codec_id == AV_CODEC_ID_MPEG1VIDEO || |
| p->codec_id == AV_CODEC_ID_MPEG2VIDEO) { |
| return 3; |
| } else if (p->codec_id == AV_CODEC_ID_H264) { |
| return 3; |
| } else if (p->codec_id == AV_CODEC_ID_MP3 || |
| p->codec_id == AV_CODEC_ID_MP2) { |
| int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size; |
| int layer = p->codec_id == AV_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 = avpriv_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25); |
| |
| for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) { |
| frame_size = |
| avpriv_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 there is no crc, if there is one the user clearly does not 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 is not set |
| //FIXME the above assumptions should be checked, if these turn out false too often something should be done |
| } |
| return 0; |
| } |
| |
| static int find_header_idx(AVFormatContext *s, AVCodecParameters *p, int size, |
| int frame_type) |
| { |
| NUTContext *nut = s->priv_data; |
| uint8_t out[64]; |
| int i; |
| int len = find_expected_header(p, size, frame_type, out); |
| |
| for (i = 1; i < nut->header_count; i++) { |
| if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) { |
| return i; |
| } |
| } |
| |
| 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 |
| static const 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; |
| AVCodecParameters *par = s->streams[stream_id]->codecpar; |
| int is_audio = par->codec_type == AVMEDIA_TYPE_AUDIO; |
| int intra_only = /*codec->intra_only || */ is_audio; |
| int pred_count; |
| int frame_size = 0; |
| |
| if (par->codec_type == AVMEDIA_TYPE_AUDIO) { |
| frame_size = av_get_audio_frame_duration2(par, 0); |
| if (par->codec_id == AV_CODEC_ID_VORBIS && !frame_size) |
| frame_size = 64; |
| } else { |
| AVRational f = av_div_q(av_inv_q(s->streams[stream_id]->avg_frame_rate), *nut->stream[stream_id].time_base); |
| if (f.den == 1 && f.num>0) |
| frame_size = f.num; |
| } |
| if (!frame_size) |
| frame_size = 1; |
| |
| for (key_frame = 0; key_frame < 2; key_frame++) { |
| if (!intra_only || !keyframe_0_esc || key_frame != 0) { |
| 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, par, -1, key_frame); |
| start2++; |
| } |
| } |
| |
| key_frame = intra_only; |
| #if 1 |
| if (is_audio) { |
| int frame_bytes; |
| int pts; |
| |
| if (par->block_align > 0) { |
| frame_bytes = par->block_align; |
| } else { |
| int frame_size = av_get_audio_frame_duration2(par, 0); |
| frame_bytes = frame_size * (int64_t)par->bit_rate / (8 * par->sample_rate); |
| } |
| |
| 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 * frame_size; |
| ft->header_idx = find_header_idx(s, par, 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 = frame_size; |
| start2++; |
| } |
| #endif |
| |
| if (par->video_delay) { |
| 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 (par->codec_id == AV_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; |
| |
| pred_table[pred] *= frame_size; |
| |
| 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, par, -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; |
| } |
| |
| static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val) |
| { |
| val *= nut->time_base_count; |
| val += time_base - nut->time_base; |
| ff_put_v(bc, val); |
| } |
| /** |
| * Store a string as vb. |
| */ |
| static void put_str(AVIOContext *bc, const char *string) |
| { |
| size_t len = strlen(string); |
| |
| ff_put_v(bc, len); |
| avio_write(bc, string, len); |
| } |
| |
| static void put_s(AVIOContext *bc, int64_t val) |
| { |
| ff_put_v(bc, 2 * FFABS(val) - (val > 0)); |
| } |
| |
| //FIXME remove calculate_checksum |
| static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc, |
| int calculate_checksum, uint64_t startcode) |
| { |
| uint8_t *dyn_buf = NULL; |
| int dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); |
| int forw_ptr = dyn_size + 4 * calculate_checksum; |
| |
| if (forw_ptr > 4096) |
| ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); |
| avio_wb64(bc, startcode); |
| ff_put_v(bc, forw_ptr); |
| if (forw_ptr > 4096) |
| avio_wl32(bc, ffio_get_checksum(bc)); |
| |
| if (calculate_checksum) |
| ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); |
| avio_write(bc, dyn_buf, dyn_size); |
| if (calculate_checksum) |
| avio_wl32(bc, ffio_get_checksum(bc)); |
| |
| av_free(dyn_buf); |
| } |
| |
| static void write_mainheader(NUTContext *nut, AVIOContext *bc) |
| { |
| int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields, |
| tmp_head_idx; |
| int64_t tmp_match; |
| |
| ff_put_v(bc, nut->version); |
| if (nut->version > 3) |
| ff_put_v(bc, nut->minor_version = 1); |
| ff_put_v(bc, nut->avf->nb_streams); |
| ff_put_v(bc, nut->max_distance); |
| ff_put_v(bc, nut->time_base_count); |
| |
| for (i = 0; i < nut->time_base_count; i++) { |
| ff_put_v(bc, nut->time_base[i].num); |
| ff_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 || |
| nut->frame_code[i].flags != tmp_flags || |
| nut->frame_code[i].stream_id != tmp_stream || |
| nut->frame_code[i].size_mul != tmp_mul || |
| nut->frame_code[i].size_lsb != tmp_size + j || |
| // nut->frame_code[i].res != tmp_res || |
| nut->frame_code[i].header_idx != tmp_head_idx) |
| break; |
| } |
| if (j != tmp_mul - tmp_size) |
| tmp_fields = 6; |
| |
| ff_put_v(bc, tmp_flags); |
| ff_put_v(bc, tmp_fields); |
| if (tmp_fields > 0) put_s(bc, tmp_pts); |
| if (tmp_fields > 1) ff_put_v(bc, tmp_mul); |
| if (tmp_fields > 2) ff_put_v(bc, tmp_stream); |
| if (tmp_fields > 3) ff_put_v(bc, tmp_size); |
| if (tmp_fields > 4) ff_put_v(bc, 0 /*tmp_res*/); |
| if (tmp_fields > 5) ff_put_v(bc, j); |
| if (tmp_fields > 6) ff_put_v(bc, tmp_match); |
| if (tmp_fields > 7) ff_put_v(bc, tmp_head_idx); |
| } |
| ff_put_v(bc, nut->header_count - 1); |
| for (i = 1; i < nut->header_count; i++) { |
| ff_put_v(bc, nut->header_len[i]); |
| avio_write(bc, nut->header[i], nut->header_len[i]); |
| } |
| // flags had been effectively introduced in version 4 |
| if (nut->version > 3) |
| ff_put_v(bc, nut->flags); |
| } |
| |
| static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc, |
| AVStream *st, int i) |
| { |
| NUTContext *nut = avctx->priv_data; |
| AVCodecParameters *par = st->codecpar; |
| |
| ff_put_v(bc, i); |
| switch (par->codec_type) { |
| case AVMEDIA_TYPE_VIDEO: ff_put_v(bc, 0); break; |
| case AVMEDIA_TYPE_AUDIO: ff_put_v(bc, 1); break; |
| case AVMEDIA_TYPE_SUBTITLE: ff_put_v(bc, 2); break; |
| default: ff_put_v(bc, 3); break; |
| } |
| ff_put_v(bc, 4); |
| |
| if (par->codec_tag) { |
| avio_wl32(bc, par->codec_tag); |
| } else { |
| av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i); |
| return AVERROR(EINVAL); |
| } |
| |
| ff_put_v(bc, nut->stream[i].time_base - nut->time_base); |
| ff_put_v(bc, nut->stream[i].msb_pts_shift); |
| ff_put_v(bc, nut->stream[i].max_pts_distance); |
| ff_put_v(bc, par->video_delay); |
| avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */ |
| |
| ff_put_v(bc, par->extradata_size); |
| avio_write(bc, par->extradata, par->extradata_size); |
| |
| switch (par->codec_type) { |
| case AVMEDIA_TYPE_AUDIO: |
| ff_put_v(bc, par->sample_rate); |
| ff_put_v(bc, 1); |
| ff_put_v(bc, par->channels); |
| break; |
| case AVMEDIA_TYPE_VIDEO: |
| ff_put_v(bc, par->width); |
| ff_put_v(bc, par->height); |
| |
| if (st->sample_aspect_ratio.num <= 0 || |
| st->sample_aspect_ratio.den <= 0) { |
| ff_put_v(bc, 0); |
| ff_put_v(bc, 0); |
| } else { |
| ff_put_v(bc, st->sample_aspect_ratio.num); |
| ff_put_v(bc, st->sample_aspect_ratio.den); |
| } |
| ff_put_v(bc, 0); /* csp type -- unknown */ |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| static int add_info(AVIOContext *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, AVIOContext *bc) |
| { |
| AVFormatContext *s = nut->avf; |
| AVDictionaryEntry *t = NULL; |
| AVIOContext *dyn_bc; |
| uint8_t *dyn_buf = NULL; |
| int count = 0, dyn_size; |
| int ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| |
| ff_standardize_creation_time(s); |
| while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) |
| count += add_info(dyn_bc, t->key, t->value); |
| |
| ff_put_v(bc, 0); //stream_if_plus1 |
| ff_put_v(bc, 0); //chapter_id |
| ff_put_v(bc, 0); //timestamp_start |
| ff_put_v(bc, 0); //length |
| |
| ff_put_v(bc, count); |
| |
| dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); |
| avio_write(bc, dyn_buf, dyn_size); |
| av_free(dyn_buf); |
| return 0; |
| } |
| |
| static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) { |
| AVFormatContext *s= nut->avf; |
| AVStream* st = s->streams[stream_id]; |
| AVDictionaryEntry *t = NULL; |
| AVIOContext *dyn_bc; |
| uint8_t *dyn_buf=NULL; |
| int count=0, dyn_size, i; |
| int ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| |
| while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) |
| count += add_info(dyn_bc, t->key, t->value); |
| for (i=0; ff_nut_dispositions[i].flag; ++i) { |
| if (st->disposition & ff_nut_dispositions[i].flag) |
| count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str); |
| } |
| if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { |
| uint8_t buf[256]; |
| if (st->r_frame_rate.num>0 && st->r_frame_rate.den>0) |
| snprintf(buf, sizeof(buf), "%d/%d", st->r_frame_rate.num, st->r_frame_rate.den); |
| else |
| snprintf(buf, sizeof(buf), "%d/%d", st->avg_frame_rate.num, st->avg_frame_rate.den); |
| count += add_info(dyn_bc, "r_frame_rate", buf); |
| } |
| dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); |
| |
| if (count) { |
| ff_put_v(bc, stream_id + 1); //stream_id_plus1 |
| ff_put_v(bc, 0); //chapter_id |
| ff_put_v(bc, 0); //timestamp_start |
| ff_put_v(bc, 0); //length |
| |
| ff_put_v(bc, count); |
| |
| avio_write(bc, dyn_buf, dyn_size); |
| } |
| |
| av_free(dyn_buf); |
| return count; |
| } |
| |
| static int write_chapter(NUTContext *nut, AVIOContext *bc, int id) |
| { |
| AVIOContext *dyn_bc; |
| uint8_t *dyn_buf = NULL; |
| AVDictionaryEntry *t = NULL; |
| AVChapter *ch = nut->avf->chapters[id]; |
| int ret, dyn_size, count = 0; |
| |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| |
| ff_put_v(bc, 0); // stream_id_plus1 |
| put_s(bc, id + 1); // chapter_id |
| put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start |
| ff_put_v(bc, ch->end - ch->start); // chapter_len |
| |
| while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) |
| count += add_info(dyn_bc, t->key, t->value); |
| |
| ff_put_v(bc, count); |
| |
| dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); |
| avio_write(bc, dyn_buf, dyn_size); |
| av_freep(&dyn_buf); |
| return 0; |
| } |
| |
| static int write_index(NUTContext *nut, AVIOContext *bc) { |
| int i; |
| Syncpoint dummy= { .pos= 0 }; |
| Syncpoint *next_node[2] = { NULL }; |
| int64_t startpos = avio_tell(bc); |
| int64_t payload_size; |
| |
| put_tt(nut, nut->max_pts_tb, bc, nut->max_pts); |
| |
| ff_put_v(bc, nut->sp_count); |
| |
| for (i=0; i<nut->sp_count; i++) { |
| av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, (void**)next_node); |
| ff_put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4)); |
| dummy.pos = next_node[1]->pos; |
| } |
| |
| for (i=0; i<nut->avf->nb_streams; i++) { |
| StreamContext *nus= &nut->stream[i]; |
| int64_t last_pts= -1; |
| int j, k; |
| for (j=0; j<nut->sp_count; j++) { |
| int flag; |
| int n = 0; |
| |
| if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) { |
| av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n"); |
| nus->keyframe_pts[j] = AV_NOPTS_VALUE; |
| } |
| |
| flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count); |
| for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++) |
| n++; |
| |
| ff_put_v(bc, 1 + 2*flag + 4*n); |
| for (k= j - n; k<=j && k<nut->sp_count; k++) { |
| if (nus->keyframe_pts[k] == AV_NOPTS_VALUE) |
| continue; |
| av_assert0(nus->keyframe_pts[k] > last_pts); |
| ff_put_v(bc, nus->keyframe_pts[k] - last_pts); |
| last_pts = nus->keyframe_pts[k]; |
| } |
| } |
| } |
| |
| payload_size = avio_tell(bc) - startpos + 8 + 4; |
| |
| avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096)); |
| |
| return 0; |
| } |
| |
| static int write_headers(AVFormatContext *avctx, AVIOContext *bc) |
| { |
| NUTContext *nut = avctx->priv_data; |
| AVIOContext *dyn_bc; |
| int i, ret; |
| |
| ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL); |
| |
| ret = avio_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++) { |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i); |
| if (ret < 0) { |
| ffio_free_dyn_buf(&dyn_bc); |
| return ret; |
| } |
| put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE); |
| } |
| |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| write_globalinfo(nut, dyn_bc); |
| put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); |
| |
| for (i = 0; i < nut->avf->nb_streams; i++) { |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| ret = write_streaminfo(nut, dyn_bc, i); |
| if (ret > 0) |
| put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); |
| else { |
| ffio_free_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| for (i = 0; i < nut->avf->nb_chapters; i++) { |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| ret = write_chapter(nut, dyn_bc, i); |
| if (ret < 0) { |
| ffio_free_dyn_buf(&dyn_bc); |
| return ret; |
| } |
| put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); |
| } |
| |
| nut->last_syncpoint_pos = INT_MIN; |
| nut->header_count++; |
| return 0; |
| } |
| |
| static int nut_write_header(AVFormatContext *s) |
| { |
| NUTContext *nut = s->priv_data; |
| AVIOContext *bc = s->pb; |
| int i, j, ret; |
| |
| nut->avf = s; |
| |
| nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags); |
| if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { |
| av_log(s, AV_LOG_ERROR, |
| "The additional syncpoint modes require version %d, " |
| "that is currently not finalized, " |
| "please set -f_strict experimental in order to enable it.\n", |
| nut->version); |
| return AVERROR_EXPERIMENTAL; |
| } |
| |
| nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream )); |
| nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter)); |
| nut->time_base= av_calloc(s->nb_streams + |
| s->nb_chapters, sizeof(*nut->time_base)); |
| if (!nut->stream || !nut->chapter || !nut->time_base) |
| return AVERROR(ENOMEM); |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| int ssize; |
| AVRational time_base; |
| ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num); |
| |
| if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate) { |
| time_base = (AVRational) {1, st->codecpar->sample_rate}; |
| } else { |
| time_base = ff_choose_timebase(s, st, 48000); |
| } |
| |
| avpriv_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 (INT64_C(1000) * time_base.num >= time_base.den) |
| nut->stream[i].msb_pts_shift = 7; |
| else |
| nut->stream[i].msb_pts_shift = 14; |
| nut->stream[i].max_pts_distance = |
| FFMAX(time_base.den, time_base.num) / time_base.num; |
| } |
| |
| for (i = 0; i < s->nb_chapters; i++) { |
| AVChapter *ch = s->chapters[i]; |
| |
| for (j = 0; j < nut->time_base_count; j++) |
| if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational))) |
| break; |
| |
| nut->time_base[j] = ch->time_base; |
| nut->chapter[i].time_base = &nut->time_base[j]; |
| if (j == nut->time_base_count) |
| nut->time_base_count++; |
| } |
| |
| nut->max_distance = MAX_DISTANCE; |
| build_elision_headers(s); |
| build_frame_code(s); |
| av_assert0(nut->frame_code['N'].flags == FLAG_INVALID); |
| |
| avio_write(bc, ID_STRING, strlen(ID_STRING)); |
| avio_w8(bc, 0); |
| |
| if ((ret = write_headers(s, bc)) < 0) |
| return ret; |
| |
| if (s->avoid_negative_ts < 0) |
| s->avoid_negative_ts = 1; |
| |
| return 0; |
| } |
| |
| static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, |
| AVPacket *pkt) |
| { |
| int flags = 0; |
| |
| if (pkt->flags & AV_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->side_data_elems && nut->version > 3) |
| flags |= FLAG_SM_DATA; |
| 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 (fc->header_idx) |
| if (pkt->size < nut->header_len[fc->header_idx] || |
| pkt->size > 4096 || |
| 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_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta) |
| { |
| int ret, i, dyn_size; |
| unsigned flags; |
| AVIOContext *dyn_bc; |
| int sm_data_count = 0; |
| uint8_t tmp[256]; |
| uint8_t *dyn_buf; |
| |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0; i<pkt->side_data_elems; i++) { |
| const uint8_t *data = pkt->side_data[i].data; |
| int size = pkt->side_data[i].size; |
| const uint8_t *data_end = data + size; |
| |
| if (is_meta) { |
| if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE |
| || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) { |
| if (!size || data[size-1]) { |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| while (data < data_end) { |
| const uint8_t *key = data; |
| const uint8_t *val = data + strlen(key) + 1; |
| |
| if(val >= data_end) { |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| put_str(dyn_bc, key); |
| put_s(dyn_bc, -1); |
| put_str(dyn_bc, val); |
| data = val + strlen(val) + 1; |
| sm_data_count++; |
| } |
| } |
| } else { |
| switch (pkt->side_data[i].type) { |
| case AV_PKT_DATA_PALETTE: |
| case AV_PKT_DATA_NEW_EXTRADATA: |
| case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: |
| default: |
| if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) { |
| put_str(dyn_bc, "Palette"); |
| } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) { |
| put_str(dyn_bc, "Extradata"); |
| } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) { |
| snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data)); |
| put_str(dyn_bc, tmp); |
| } else { |
| snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d", |
| (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT, |
| pkt->side_data[i].type); |
| put_str(dyn_bc, tmp); |
| } |
| put_s(dyn_bc, -2); |
| put_str(dyn_bc, "bin"); |
| ff_put_v(dyn_bc, pkt->side_data[i].size); |
| avio_write(dyn_bc, data, pkt->side_data[i].size); |
| sm_data_count++; |
| break; |
| case AV_PKT_DATA_PARAM_CHANGE: |
| flags = bytestream_get_le32(&data); |
| if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { |
| put_str(dyn_bc, "Channels"); |
| put_s(dyn_bc, bytestream_get_le32(&data)); |
| sm_data_count++; |
| } |
| if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { |
| put_str(dyn_bc, "ChannelLayout"); |
| put_s(dyn_bc, -2); |
| put_str(dyn_bc, "u64"); |
| ff_put_v(bc, 8); |
| avio_write(dyn_bc, data, 8); data+=8; |
| sm_data_count++; |
| } |
| if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { |
| put_str(dyn_bc, "SampleRate"); |
| put_s(dyn_bc, bytestream_get_le32(&data)); |
| sm_data_count++; |
| } |
| if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { |
| put_str(dyn_bc, "Width"); |
| put_s(dyn_bc, bytestream_get_le32(&data)); |
| put_str(dyn_bc, "Height"); |
| put_s(dyn_bc, bytestream_get_le32(&data)); |
| sm_data_count+=2; |
| } |
| break; |
| case AV_PKT_DATA_SKIP_SAMPLES: |
| if (AV_RL32(data)) { |
| put_str(dyn_bc, "SkipStart"); |
| put_s(dyn_bc, (unsigned)AV_RL32(data)); |
| sm_data_count++; |
| } |
| if (AV_RL32(data+4)) { |
| put_str(dyn_bc, "SkipEnd"); |
| put_s(dyn_bc, (unsigned)AV_RL32(data+4)); |
| sm_data_count++; |
| } |
| break; |
| case AV_PKT_DATA_METADATA_UPDATE: |
| case AV_PKT_DATA_STRINGS_METADATA: |
| case AV_PKT_DATA_QUALITY_STATS: |
| // belongs into meta, not side data |
| break; |
| } |
| } |
| } |
| |
| fail: |
| ff_put_v(bc, sm_data_count); |
| dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); |
| avio_write(bc, dyn_buf, dyn_size); |
| av_freep(&dyn_buf); |
| |
| return ret; |
| } |
| |
| static int nut_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| NUTContext *nut = s->priv_data; |
| StreamContext *nus = &nut->stream[pkt->stream_index]; |
| AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL; |
| FrameCode *fc; |
| int64_t coded_pts; |
| int best_length, frame_code, flags, needed_flags, i, header_idx; |
| int best_header_idx; |
| int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY); |
| int store_sp = 0; |
| int ret = 0; |
| int sm_size = 0; |
| int data_size = pkt->size; |
| uint8_t *sm_buf = NULL; |
| |
| if (pkt->pts < 0) { |
| av_log(s, AV_LOG_ERROR, |
| "Negative pts not supported stream %d, pts %"PRId64"\n", |
| pkt->stream_index, pkt->pts); |
| if (pkt->pts == AV_NOPTS_VALUE) |
| av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (pkt->side_data_elems && nut->version > 3) { |
| ret = avio_open_dyn_buf(&sm_bc); |
| if (ret < 0) |
| return ret; |
| ret = write_sm_data(s, sm_bc, pkt, 0); |
| if (ret >= 0) |
| ret = write_sm_data(s, sm_bc, pkt, 1); |
| sm_size = avio_close_dyn_buf(sm_bc, &sm_buf); |
| if (ret < 0) |
| goto fail; |
| data_size += sm_size; |
| } |
| |
| if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc)) |
| write_headers(s, bc); |
| |
| if (key_frame && !(nus->last_flags & FLAG_KEY)) |
| store_sp = 1; |
| |
| if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance) |
| store_sp = 1; |
| |
| //FIXME: Ensure store_sp is 1 in the first place. |
| |
| if (store_sp && |
| (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) { |
| int64_t sp_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) { |
| sp_pos = FFMIN(sp_pos, st->index_entries[index].pos); |
| if (!nut->write_index && 2*index > st->nb_index_entries) { |
| memmove(st->index_entries, |
| st->index_entries + index, |
| sizeof(*st->index_entries) * (st->nb_index_entries - index)); |
| st->nb_index_entries -= index; |
| } |
| } |
| } |
| |
| nut->last_syncpoint_pos = avio_tell(bc); |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret < 0) |
| goto fail; |
| put_tt(nut, nus->time_base, dyn_bc, pkt->dts); |
| ff_put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0); |
| |
| if (nut->flags & NUT_BROADCAST) { |
| put_tt(nut, nus->time_base, dyn_bc, |
| av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base)); |
| } |
| put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE); |
| |
| if (nut->write_index) { |
| if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0) |
| goto fail; |
| |
| if ((1ll<<60) % nut->sp_count == 0) |
| for (i=0; i<s->nb_streams; i++) { |
| int j; |
| StreamContext *nus = &nut->stream[i]; |
| av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts)); |
| if (!nus->keyframe_pts) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++) |
| nus->keyframe_pts[j] = AV_NOPTS_VALUE; |
| } |
| } |
| } |
| av_assert0(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 += ff_get_v_length(pkt->stream_index); |
| |
| if (data_size % fc->size_mul != fc->size_lsb) |
| continue; |
| if (flags & FLAG_SIZE_MSB) |
| length += ff_get_v_length(data_size / fc->size_mul); |
| |
| if (flags & FLAG_CHECKSUM) |
| length += 4; |
| |
| if (flags & FLAG_CODED_PTS) |
| length += ff_get_v_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; |
| } |
| } |
| av_assert0(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; |
| |
| ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); |
| avio_w8(bc, frame_code); |
| if (flags & FLAG_CODED) { |
| ff_put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED)); |
| flags = needed_flags; |
| } |
| if (flags & FLAG_STREAM_ID) ff_put_v(bc, pkt->stream_index); |
| if (flags & FLAG_CODED_PTS) ff_put_v(bc, coded_pts); |
| if (flags & FLAG_SIZE_MSB ) ff_put_v(bc, data_size / fc->size_mul); |
| if (flags & FLAG_HEADER_IDX) ff_put_v(bc, header_idx = best_header_idx); |
| |
| if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc)); |
| else ffio_get_checksum(bc); |
| |
| if (flags & FLAG_SM_DATA) { |
| avio_write(bc, sm_buf, sm_size); |
| } |
| avio_write(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 && !(nut->flags & NUT_PIPE)) { |
| av_add_index_entry( |
| s->streams[pkt->stream_index], |
| nut->last_syncpoint_pos, |
| pkt->pts, |
| 0, |
| 0, |
| AVINDEX_KEYFRAME); |
| if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE) |
| nus->keyframe_pts[nut->sp_count] = pkt->pts; |
| } |
| |
| if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) { |
| nut->max_pts = pkt->pts; |
| nut->max_pts_tb = nus->time_base; |
| } |
| |
| fail: |
| av_freep(&sm_buf); |
| |
| return ret; |
| } |
| |
| static int nut_write_trailer(AVFormatContext *s) |
| { |
| NUTContext *nut = s->priv_data; |
| AVIOContext *bc = s->pb, *dyn_bc; |
| int ret; |
| |
| while (nut->header_count < 3) |
| write_headers(s, bc); |
| |
| if (!nut->sp_count) |
| return 0; |
| |
| ret = avio_open_dyn_buf(&dyn_bc); |
| if (ret >= 0) { |
| av_assert1(nut->write_index); // sp_count should be 0 if no index is going to be written |
| write_index(nut, dyn_bc); |
| put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE); |
| } |
| |
| return 0; |
| } |
| |
| static void nut_write_deinit(AVFormatContext *s) |
| { |
| NUTContext *nut = s->priv_data; |
| int i; |
| |
| ff_nut_free_sp(nut); |
| if (nut->stream) |
| for (i=0; i<s->nb_streams; i++) |
| av_freep(&nut->stream[i].keyframe_pts); |
| |
| av_freep(&nut->stream); |
| av_freep(&nut->chapter); |
| av_freep(&nut->time_base); |
| } |
| |
| #define OFFSET(x) offsetof(NUTContext, x) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" }, |
| { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" }, |
| { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, "syncpoints" }, |
| { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" }, |
| { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E, }, |
| { NULL }, |
| }; |
| |
| static const AVClass class = { |
| .class_name = "nutenc", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVOutputFormat ff_nut_muxer = { |
| .name = "nut", |
| .long_name = NULL_IF_CONFIG_SMALL("NUT"), |
| .mime_type = "video/x-nut", |
| .extensions = "nut", |
| .priv_data_size = sizeof(NUTContext), |
| .audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS : |
| CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2, |
| .video_codec = AV_CODEC_ID_MPEG4, |
| .write_header = nut_write_header, |
| .write_packet = nut_write_packet, |
| .write_trailer = nut_write_trailer, |
| .deinit = nut_write_deinit, |
| .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS, |
| .codec_tag = ff_nut_codec_tags, |
| .priv_class = &class, |
| }; |
