/*
- * NUT (de)muxer based on initial draft
- * Copyright (c) 2003 Alex Beregszaszi
+ * nut
+ * Copyright (c) 2004-2007 Michael Niedermayer
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * NUT DRAFT can be found in MPlayer CVS at DOCS/tech/mpcf.txt
- *
- * Compatible with draft version 20030906
- *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-/*
- * TODO:
- * - checksumming
- * - correct rate denom/nom and sample_mul
- * - correct timestamp handling
- * - correct startcodes
- * - index writing
- * - info and index packet reading support
- * - startcode searching for broken streams
- * - subpacket support
- * - handling of codec specific headers
-*/
-
-//#define DEBUG 1
-
-#include "avformat.h"
-#include "mpegaudio.h"
-
-typedef struct {
- int curr_frame_start;
- int last_frame_size;
- int curr_frame_size;
-} NUTContext;
-
-static int bytes_left(ByteIOContext *bc)
-{
- return bc->buf_end - bc->buf_ptr;
-}
-
-static uint64_t get_v(ByteIOContext *bc)
-{
- uint64_t val = 0;
-
-// for (; bytes_left(s)*8 > 0; )
- for(; bytes_left(bc) > 0; )
- {
- int tmp = get_byte(bc);
-
- if (tmp&0x80)
- val= (val<<7) + tmp - 0x80;
- else
- return (val<<7) + tmp;
- }
- 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;
-
- len = get_v(bc);
- for (i = 0; i < len && i < maxlen; i++)
- data[i] = get_byte(bc);
- if (i < len)
- {
- len = i;
- for (i = 0; i < len; i++)
- get_byte(bc);
- }
-
- return 0;
-}
-
-static int get_packetheader(NUTContext *nut, ByteIOContext *bc)
-{
- 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;
-}
-
-static int get_padding(NUTContext *nut, ByteIOContext *bc)
-{
- int i, tmp, len = nut->curr_frame_size - (url_ftell(bc) - nut->curr_frame_start);
-
- for (i = 0; i < len; i++)
- {
- tmp = get_byte(bc);
- if (tmp != 0)
- fprintf(stderr, "bad padding\n");
- }
-
- return 0;
-}
-
-static int put_v(ByteIOContext *bc, uint64_t val)
-{
- int i;
-
-// if (bytes_left(s)*8 < 9)
-// return -1;
-
- if (bytes_left(bc) < 1)
- return -1;
-
- val &= 0x7FFFFFFFFFFFFFFFULL; // FIXME can only encode upto 63 bits currently
- for (i=7; ; i+=7)
- if ((val>>i) == 0)
- break;
-
- for (i-=7; i>0; i-=8)
- put_byte(bc, 0x80 | (val>>i));
-
- put_byte(bc, val&0x7f);
-
- 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;
-
- put_v(bc, len);
- for (i = 0; i < len; i++)
- put_byte(bc, data[i]);
-
- return 0;
-}
-
-static int put_packetheader(NUTContext *nut, ByteIOContext *bc, int est_size)
-{
- put_flush_packet(bc);
- nut->curr_frame_start = url_ftell(bc);
- nut->curr_frame_size = est_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);
-
- nut->last_frame_size = nut->curr_frame_size;
-
- return 0;
-}
+#include "nut.h"
+#include "tree.h"
-static int put_padding(NUTContext *nut, ByteIOContext *bc)
-{
- int i, len = nut->curr_frame_size - (url_ftell(bc) - nut->curr_frame_start);
-
- put_flush_packet(bc);
- for (i = 0; i < len; i++)
- put_byte(bc, 0);
-
- dprintf("padded %d bytes\n", i);
-
- return 0;
-}
-
-static int nut_write_header(AVFormatContext *s)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- AVCodecContext *codec;
+void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
int i;
- int stream_length = 0;
-
- for (i = 0; i < s->nb_streams; i++)
- {
- if (stream_length < (s->streams[i]->duration * (AV_TIME_BASE / 1000)))
- stream_length = s->streams[i]->duration * (AV_TIME_BASE / 1000);
+ for(i=0; i<nut->avf->nb_streams; i++){
+ nut->stream[i].last_pts= av_rescale_rnd(
+ val / nut->time_base_count,
+ time_base.num * (int64_t)nut->stream[i].time_base->den,
+ time_base.den * (int64_t)nut->stream[i].time_base->num,
+ AV_ROUND_DOWN);
}
-
- put_packetheader(nut, bc, 16); /* FIXME: estimation */
-
- /* main header */
- put_le64(bc, 1); /* FIXME: unique startcode */
- put_v(bc, 0); /* version */
- put_v(bc, s->nb_streams);
- put_v(bc, 0); /* file size */
- put_v(bc, stream_length); /* len in msec */
- put_padding(nut, bc);
- put_le32(bc, 0); /* FIXME: checksum */
-
- /* stream headers */
- for (i = 0; i < s->nb_streams; i++)
- {
- codec = &s->streams[i]->codec;
-
- put_packetheader(nut, bc, 64); /* FIXME: estimation */
- put_le64(bc, 1); /* FIXME: unique startcode */
- put_v(bc, s->streams[i]->index);
- put_v(bc, (codec->codec_type == CODEC_TYPE_AUDIO) ? 32 : 0);
- if (codec->codec_tag)
- put_b(bc, codec->codec_tag, 4);
- else if (codec->codec_type == CODEC_TYPE_VIDEO)
- {
- int tmp = codec_get_bmp_tag(codec->codec_id);
- put_b(bc, &tmp, 4);
-// put_v(bc, 4); /* len */
-// put_le32(bc, codec_get_bmp_tag(codec->codec_id));
- }
- else if (codec->codec_type == CODEC_TYPE_AUDIO)
- {
- int tmp = codec_get_wav_tag(codec->codec_id);
- put_b(bc, &tmp, 4);
-// put_v(bc, 4); /* len */
-// put_le32(bc, codec_get_wav_tag(codec->codec_id));
- }
- put_v(bc, codec->bit_rate);
- put_v(bc, 0); /* no language code */
- put_v(bc, codec->frame_rate_base);
- put_v(bc, codec->frame_rate);
- put_v(bc, 0); /* timestamp_shift */
- put_v(bc, 0); /* shuffle type */
- put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
-
- put_v(bc, 0); /* no codec specific headers */
-
- switch(codec->codec_type)
- {
- case CODEC_TYPE_AUDIO:
- put_v(bc, codec->sample_rate / (double)(codec->frame_rate_base / codec->frame_rate));
- put_v(bc, codec->channels);
- put_padding(nut, bc);
- put_le32(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, 0); /* csp type -- unknown */
- put_padding(nut, bc);
- put_le32(bc, 0); /* FIXME: checksum */
- break;
- }
- }
-
-#if 0
- /* info header */
- put_packetheader(nut, bc, 16+strlen(s->author)+strlen(s->title)+
- strlen(s->comment)+strlen(s->copyright)); /* FIXME: estimation */
- put_le64(bc, 1); /* FIXME: unique startcode */
- if (s->author[0])
- {
- put_v(bc, 5); /* type */
- put_b(bc, s->author, strlen(s->author));
- }
- if (s->title[0])
- {
- put_v(bc, 6); /* type */
- put_b(bc, s->title, strlen(s->title));
- }
- if (s->comment[0])
- {
- put_v(bc, 7); /* type */
- put_b(bc, s->comment, strlen(s->comment));
- }
- if (s->copyright[0])
- {
- put_v(bc, 8); /* type */
- put_b(bc, s->copyright, strlen(s->copyright));
- }
- /* encoder */
- put_v(bc, 9); /* type */
- put_b(bc, LIBAVFORMAT_IDENT, strlen(LIBAVFORMAT_IDENT));
-
- put_padding(nut, bc);
- put_le32(bc, 0); /* FIXME: checksum */
-#endif
-
- put_flush_packet(bc);
-
- return 0;
}
-static int nut_write_packet(AVFormatContext *s, int stream_index,
- uint8_t *buf, int size, int force_pts)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- int key_frame = 0;
- AVCodecContext *enc;
-
- if (stream_index > s->nb_streams)
- return 1;
-
- enc = &s->streams[stream_index]->codec;
- if (enc->codec_type == CODEC_TYPE_VIDEO)
- key_frame = enc->coded_frame->key_frame;
-
- put_packetheader(nut, bc, size+(key_frame?16:8)+4); /* FIXME: estimation */
-
- if (key_frame)
- put_le64(bc, 1); /* FIXME: unique startcode */
- put_byte(bc, (key_frame ? 1<<5 : 0) + (1 << 1)); /* flags */
- put_v(bc, stream_index);
- put_s(bc, 0); /* lsb_timestamp */
-
- put_buffer(bc, buf, size);
-
- put_padding(nut, bc);
-
- put_flush_packet(bc);
-
- return 0;
-}
-
-static int nut_write_trailer(AVFormatContext *s)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
-#if 0
- int i;
-
- /* WRITE INDEX */
-
- for (i = 0; s->nb_streams; i++)
- {
- put_packetheader(nut, bc, 64); /* FIXME: estimation */
- put_le64(bc, 1); /* FIXME: unique startcode */
- put_v(bc, s->streams[i]->id);
- put_v(bc, ...);
- put_padding(nut, bc);
- put_le32(bc, 0); /* FIXME: checksum */
- }
-#endif
-
- put_flush_packet(bc);
-
- return 0;
+int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
+ int64_t mask = (1<<stream->msb_pts_shift)-1;
+ int64_t delta= stream->last_pts - mask/2;
+ return ((lsb - delta)&mask) + delta;
}
-static int nut_probe(AVProbeData *p)
-{
- return AVPROBE_SCORE_MAX;
+int ff_nut_sp_pos_cmp(syncpoint_t *a, syncpoint_t *b){
+ return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
}
-static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- int tmp;
- int cur_stream, nb_streams;
-
- /* main header */
- get_packetheader(nut, bc);
- tmp = get_le64(bc);
- if (tmp != 1)
- fprintf(stderr, "damaged? startcode!=1 (%d)\n", tmp);
-
- tmp = get_v(bc);
- if (tmp != 0)
- fprintf(stderr, "bad version (%d)\n", tmp);
-
- nb_streams = get_v(bc);
-
- s->file_size = get_v(bc);
- s->duration = get_v(bc) / (AV_TIME_BASE / 1000);
-
- get_padding(nut, bc);
- get_le32(bc); /* checkusm */
-
- s->bit_rate = 0;
-
- /* stream header */
- for (cur_stream = 0; cur_stream < nb_streams; cur_stream++)
- {
- int class;
- AVStream *st;
-
- get_packetheader(nut, bc);
- tmp = get_le64(bc);
- if (tmp != 1)
- fprintf(stderr, "damaged? startcode!=1 (%d)\n", tmp);
- st = av_new_stream(s, get_v(bc));
- if (!st)
- return AVERROR_NOMEM;
- class = get_v(bc);
- switch(class)
- {
- case 0:
- st->codec.codec_type = CODEC_TYPE_VIDEO;
-// get_v(bc);
-// tmp = get_le32(bc);
- get_b(bc, &tmp, 4);
- st->codec.codec_id = codec_get_bmp_id(tmp);
- if (st->codec.codec_id == CODEC_ID_NONE)
- fprintf(stderr, "Unknown codec?!\n");
- break;
- case 32:
- st->codec.codec_type = CODEC_TYPE_AUDIO;
-// tmp = get_v(bc);
-// tmp = get_le32(bc);
- get_b(bc, &tmp, 4);
- st->codec.codec_id = codec_get_wav_id(tmp);
- if (st->codec.codec_id == CODEC_ID_NONE)
- fprintf(stderr, "Unknown codec?!\n");
- break;
- default:
- fprintf(stderr, "Unknown stream class (%d)\n", class);
- return -1;
- }
- s->bit_rate += get_v(bc);
- tmp = get_v(bc); /* language code */
- while(tmp--)
- get_byte(bc);
- st->codec.frame_rate_base = get_v(bc);
- st->codec.frame_rate = get_v(bc);
- get_v(bc); /* FIXME: msb timestamp base */
- get_v(bc); /* shuffle type */
- get_byte(bc); /* flags */
-
- get_v(bc); /* FIXME: codec specific data headers */
-
- 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 */
- get_v(bc); /* csp type */
- get_padding(nut, bc);
- get_le32(bc); /* checksum */
- }
- if (class == 32) /* AUDIO */
- {
- st->codec.sample_rate = get_v(bc) * (double)(st->codec.frame_rate_base / st->codec.frame_rate);
- st->codec.channels = get_v(bc);
- get_padding(nut, bc);
- get_le32(bc); /* checksum */
- }
- }
-
- return 0;
+int ff_nut_sp_pts_cmp(syncpoint_t *a, syncpoint_t *b){
+ return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
}
-static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- NUTContext *nut = s->priv_data;
- ByteIOContext *bc = &s->pb;
- int tmp, id, timestamp, size;
- int key_frame = 0;
+void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
+ syncpoint_t *sp= av_mallocz(sizeof(syncpoint_t));
+ struct AVTreeNode *node= av_mallocz(av_tree_node_size);
- get_packetheader(nut, bc);
-
- if (url_feof(bc))
- return -1;
-
- tmp = get_byte(bc);
- if ((tmp & 0x7f) == 1) /* zero bit set? */
- {
- tmp = get_le32(bc)+get_le16(bc)+get_byte(bc);
- if (!tmp)
- {
- key_frame = 1;
- tmp = get_byte(bc); /* flags */
- }
- else
- fprintf(stderr, "error in zero bit / startcode\n");
+ sp->pos= pos;
+ sp->back_ptr= back_ptr;
+ sp->ts= ts;
+ av_tree_insert(&nut->syncpoints, sp, ff_nut_sp_pos_cmp, &node);
+ if(node){
+ av_free(sp);
+ av_free(node);
}
- if ((tmp & 0x9f) > 3) /* priority <= 3 */
- fprintf(stderr, "sanity check failed!\n");
- id = get_v(bc);
- timestamp = get_s(bc);
-
- size = (nut->curr_frame_size - (url_ftell(bc)-nut->curr_frame_start));
- dprintf("flags: 0x%x, timestamp: %d, packet size: %d\n", tmp, timestamp, size);
-
- if (size < 0)
- return -1;
-
- av_new_packet(pkt, size);
- get_buffer(bc, pkt->data, size);
- pkt->stream_index = id;
- if (key_frame)
- pkt->flags |= PKT_FLAG_KEY;
- pkt->pts = timestamp;
-
- return 0;
-}
-
-static AVInputFormat nut_iformat = {
- "nut",
- "nut format",
- sizeof(NUTContext),
- nut_probe,
- nut_read_header,
- nut_read_packet,
-// nut_read_close,
-// nut_read_seek,
- .extensions = "nut",
-};
-
-static AVOutputFormat nut_oformat = {
- "nut",
- "nut format",
- "video/x-nut",
- "nut",
- sizeof(NUTContext),
-#ifdef CONFIG_VORBIS
- CODEC_ID_VORBIS,
-#elif defined(CONFIG_MP3LAME)
- CODEC_ID_MP3LAME,
-#else
- CODEC_ID_MP2,
-#endif
- CODEC_ID_MPEG4,
- nut_write_header,
- nut_write_packet,
- nut_write_trailer,
-};
-
-int nut_init(void)
-{
- av_register_input_format(&nut_iformat);
- av_register_output_format(&nut_oformat);
- return 0;
}