* nut muxer
* Copyright (c) 2004-2007 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/tree.h"
+#include "libavutil/dict.h"
+#include "libavcodec/mpegaudiodata.h"
#include "nut.h"
+#include "internal.h"
+#include "avio_internal.h"
-#define TRACE
+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= 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, 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
+ 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 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 */
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 is_audio= codec->codec_type == AVMEDIA_TYPE_AUDIO;
int intra_only= /*codec->intra_only || */is_audio;
int pred_count;
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;
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++;
}
}
ft->pts_delta=1;
start2++;
}
-#endif
if(codec->has_b_frames){
pred_count=5;
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);
}
}
}
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_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);
}
/**
- * stores a string as vb.
+ * Store a string as vb.
*/
-static void put_str(ByteIOContext *bc, const char *string){
+static void put_str(AVIOContext *bc, const char *string){
int len= strlen(string);
- put_v(bc, len);
- put_buffer(bc, string, len);
+ ff_put_v(bc, len);
+ avio_write(bc, string, len);
}
-static void put_s(ByteIOContext *bc, int64_t val){
- put_v(bc, 2*FFABS(val) - (val>0));
+static void put_s(AVIOContext *bc, int64_t val){
+ ff_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){
- printf("get_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
+static inline void ff_put_v_trace(AVIOContext *bc, uint64_t v, char *file, char *func, int line){
+ av_log(NULL, AV_LOG_DEBUG, "ff_put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
- put_v(bc, v);
+ ff_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);
+static inline void put_s_trace(AVIOContext *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 ff_put_v(bc, v) ff_put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#endif
-static void put_packet(NUTContext *nut, ByteIOContext *bc, ByteIOContext *dyn_bc, int calculate_checksum){
+//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= url_close_dyn_buf(dyn_bc, &dyn_buf);
+ 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));
- put_v(bc, dyn_size + 4*calculate_checksum);
if(calculate_checksum)
- init_checksum(bc, av_crc04C11DB7_update, 0);
- put_buffer(bc, dyn_buf, dyn_size);
+ ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
+ avio_write(bc, dyn_buf, dyn_size);
if(calculate_checksum)
- put_le32(bc, get_checksum(bc));
+ avio_wl32(bc, ffio_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;
+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;
- put_v(bc, 2); /* version */
- put_v(bc, nut->avf->nb_streams);
- put_v(bc, MAX_DISTANCE);
- put_v(bc, nut->time_base_count);
+ ff_put_v(bc, 3); /* version */
+ 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++){
- put_v(bc, nut->time_base[i].num);
- put_v(bc, nut->time_base[i].den);
+ 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;
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_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'){
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);
+ 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) 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>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]);
}
}
-static int write_streamheader(NUTContext *nut, ByteIOContext *bc, AVCodecContext *codec, int i){
- put_v(bc, i);
+static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc, AVStream *st, int i){
+ NUTContext *nut = avctx->priv_data;
+ AVCodecContext *codec = st->codec;
+ ff_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;
+ 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;
}
- put_v(bc, 4);
+ ff_put_v(bc, 4);
if (codec->codec_tag){
- put_le32(bc, codec->codec_tag);
- }else
- return -1;
+ avio_wl32(bc, codec->codec_tag);
+ } else {
+ av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i);
+ return AVERROR(EINVAL);
+ }
- put_v(bc, (nut->stream[i].time_base - nut->time_base)/sizeof(AVRational));
- 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 */
+ 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, codec->has_b_frames);
+ avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
- put_v(bc, codec->extradata_size);
- put_buffer(bc, codec->extradata, codec->extradata_size);
+ ff_put_v(bc, codec->extradata_size);
+ avio_write(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);
+ case AVMEDIA_TYPE_AUDIO:
+ ff_put_v(bc, codec->sample_rate);
+ ff_put_v(bc, 1);
+ ff_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 */
+ case AVMEDIA_TYPE_VIDEO:
+ ff_put_v(bc, codec->width);
+ ff_put_v(bc, codec->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 write_header(AVFormatContext *s){
+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;
+
+ 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];
+ 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;
+
+ 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);
+ }
+ 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_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;
+ if ((ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i)) < 0)
+ 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)
+ return ret;
+ if (ret > 0)
+ put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
+ else {
+ uint8_t* buf;
+ avio_close_dyn_buf(dyn_bc, &buf);
+ av_free(buf);
+ }
+ }
+
+ 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) {
+ uint8_t *buf;
+ avio_close_dyn_buf(dyn_bc, &buf);
+ av_freep(&buf);
+ 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;
- ByteIOContext *bc = &s->pb, dyn_bc;
- AVCodecContext *codec;
- int i, j;
+ AVIOContext *bc = s->pb;
+ int i, j, ret;
nut->avf= s;
nut->stream = av_mallocz(sizeof(StreamContext)*s->nb_streams);
- nut->time_base= av_mallocz(sizeof(AVRational )*s->nb_streams);
+ if (s->nb_chapters)
+ nut->chapter = av_mallocz(sizeof(ChapterContext)*s->nb_chapters);
+ nut->time_base= av_mallocz(sizeof(AVRational )*(s->nb_streams +
+ s->nb_chapters));
+ if (!nut->stream || (s->nb_chapters && !nut->chapter) || !nut->time_base) {
+ av_freep(&nut->stream);
+ av_freep(&nut->chapter);
+ av_freep(&nut->time_base);
+ return AVERROR(ENOMEM);
+ }
for(i=0; i<s->nb_streams; i++){
AVStream *st= s->streams[i];
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);
+ 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))){
if(j==nut->time_base_count)
nut->time_base_count++;
- if(av_q2d(time_base) >= 0.001)
+ 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(1/av_q2d(time_base), 1);
+ 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);
assert(nut->frame_code['N'].flags == FLAG_INVALID);
- put_buffer(bc, ID_STRING, strlen(ID_STRING));
- put_byte(bc, 0);
+ avio_write(bc, ID_STRING, strlen(ID_STRING));
+ avio_w8(bc, 0);
+
+ if ((ret = write_headers(s, bc)) < 0)
+ return ret;
+
+ avio_flush(bc);
+
+ //FIXME index
- /* main header */
- put_be64(bc, MAIN_STARTCODE);
- url_open_dyn_buf(&dyn_bc);
- write_mainheader(nut, &dyn_bc);
- put_packet(nut, bc, &dyn_bc, 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->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);
+}
- for (i=0; i < s->nb_streams; i++){
- codec = s->streams[i]->codec;
+static int find_best_header_idx(NUTContext *nut, AVPacket *pkt){
+ int i;
+ int best_i = 0;
+ int best_len= 0;
- put_be64(bc, STREAM_STARTCODE);
- url_open_dyn_buf(&dyn_bc);
- write_streamheader(nut, &dyn_bc, codec, i);
- put_packet(nut, bc, &dyn_bc, 1);
+ 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;
+}
- put_flush_packet(bc);
+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;
+ 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 & AV_PKT_FLAG_KEY);
+ int store_sp=0;
+ int ret;
+
+ if(pkt->pts < 0)
+ return -1;
+
+ 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(pkt->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){
+ Syncpoint *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, (void *) ff_nut_sp_pos_cmp,
+ NULL);
+
+ nut->last_syncpoint_pos= avio_tell(bc);
+ ret = avio_open_dyn_buf(&dyn_bc);
+ if(ret < 0)
+ return ret;
+ put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
+ ff_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;
- //FIXME info header, header repeation, header packet CRC, ...
+ if((flags ^ needed_flags) & FLAG_KEY)
+ continue;
+
+ if(flags & FLAG_STREAM_ID)
+ length+= ff_get_v_length(pkt->stream_index);
+
+ if(pkt->size % fc->size_mul != fc->size_lsb)
+ continue;
+ if(flags & FLAG_SIZE_MSB)
+ length += ff_get_v_length(pkt->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;
+ }
+ }
+ 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;
+
+ 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, pkt->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);
+
+ 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)
+ av_add_index_entry(
+ s->streams[pkt->stream_index],
+ nut->last_syncpoint_pos,
+ pkt->pts,
+ 0,
+ 0,
+ AVINDEX_KEYFRAME);
return 0;
}
-static int write_packet(AVFormatContext *s, AVPacket *pkt){
- //FIXME
+static int nut_write_trailer(AVFormatContext *s){
+ NUTContext *nut= s->priv_data;
+ AVIOContext *bc= s->pb;
+
+ while(nut->header_count<3)
+ write_headers(s, bc);
+ avio_flush(bc);
+ ff_nut_free_sp(nut);
+ av_freep(&nut->stream);
+ av_freep(&nut->chapter);
+ av_freep(&nut->time_base);
+
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,
+AVOutputFormat ff_nut_muxer = {
+ .name = "nut",
+ .long_name = NULL_IF_CONFIG_SMALL("NUT format"),
+ .mime_type = "video/x-nut",
+ .extensions = "nut",
+ .priv_data_size = sizeof(NUTContext),
+#if CONFIG_LIBVORBIS
+ .audio_codec = CODEC_ID_VORBIS,
+#elif CONFIG_LIBMP3LAME
+ .audio_codec = CODEC_ID_MP3,
#else
- CODEC_ID_MP2, /* AC3 needs liba52 decoder */
+ .audio_codec = CODEC_ID_MP2,
#endif
- CODEC_ID_MPEG4,
- write_header,
- write_packet,
-// write_trailer,
- .flags = AVFMT_GLOBALHEADER,
- .codec_tag= (const AVCodecTag*[]){codec_bmp_tags, codec_wav_tags, 0},
+ .video_codec = CODEC_ID_MPEG4,
+ .write_header = nut_write_header,
+ .write_packet = nut_write_packet,
+ .write_trailer = nut_write_trailer,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
+ .codec_tag = (const AVCodecTag * const []){ ff_codec_bmp_tags, ff_nut_video_tags, ff_codec_wav_tags, ff_nut_subtitle_tags, 0 },
};
projects / ffmpeg / blobdiff