3 * Copyright (c) 2003 The FFmpeg Project.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 unsigned int get_be24(ByteIOContext *s)
24 val = get_byte(s) << 16;
25 val |= get_byte(s) << 8;
30 static int flv_probe(AVProbeData *p)
37 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V') {
43 static int flv_read_header(AVFormatContext *s,
44 AVFormatParameters *ap)
49 av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
52 flags = get_byte(&s->pb);
55 st = av_new_stream(s, 0);
58 st->codec.codec_type = CODEC_TYPE_VIDEO;
59 st->codec.codec_id = CODEC_ID_FLV1;
63 st = av_new_stream(s, 1);
66 st->codec.codec_type = CODEC_TYPE_AUDIO;
67 st->codec.codec_id = CODEC_ID_MP3;
70 offset = get_be32(&s->pb);
71 url_fseek(&s->pb, offset, SEEK_SET);
76 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
78 int ret, i, type, size, pts, flags;
82 url_fskip(&s->pb, 4); /* size of previous packet */
83 type = get_byte(&s->pb);
84 size = get_be24(&s->pb);
85 pts = get_be24(&s->pb);
88 url_fskip(&s->pb, 4); /* reserved */
91 flags = get_byte(&s->pb);
93 if ((flags >> 4) != 2) { /* 0: uncompressed 1: ADPCM 2: mp3 5: Nellymoser 8kHz mono 6: Nellymoser*/
96 } else if (type == 9) {
97 flags = get_byte(&s->pb);
99 if ((flags & 0xF) != 2) { /* 2: only format */
105 printf("skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
106 url_fskip(&s->pb, size);
110 /* now find stream */
111 for(i=0;i<s->nb_streams;i++) {
113 if (st->id == ((type == 9) ? 0 : 1))
119 if (av_new_packet(pkt, size) < 0)
122 ret = get_buffer(&s->pb, pkt->data, size);
127 /* note: we need to modify the packet size here to handle the last
131 pkt->stream_index = st->index;
135 static int flv_read_close(AVFormatContext *s)
140 AVInputFormat flv_iformat = {
149 .value = CODEC_ID_FLV1,
152 int flvdec_init(void)
154 av_register_input_format(&flv_iformat);