summaryrefslogtreecommitdiffstats
path: root/stream/stream_lavf.c
blob: 4c7e5a7c40c03e7c49ba1ce80aa30072e473d143 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
/*
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include "libavformat/avformat.h"
#include "libavformat/avio.h"
#include "core/mp_msg.h"
#include "stream.h"
#include "core/m_option.h"
#include "core/m_struct.h"
#include "demux/demux.h"

static int fill_buffer(stream_t *s, char *buffer, int max_len)
{
    AVIOContext *avio = s->priv;
    int r = avio_read(avio, buffer, max_len);
    return (r <= 0) ? -1 : r;
}

static int write_buffer(stream_t *s, char *buffer, int len)
{
    AVIOContext *avio = s->priv;
    avio_write(avio, buffer, len);
    avio_flush(avio);
    if (avio->error)
        return -1;
    return len;
}

static int seek(stream_t *s, int64_t newpos)
{
    AVIOContext *avio = s->priv;
    s->pos = newpos;
    if (avio_seek(avio, s->pos, SEEK_SET) < 0) {
        s->eof = 1;
        return 0;
    }
    return 1;
}

static int control(stream_t *s, int cmd, void *arg)
{
    AVIOContext *avio = s->priv;
    int64_t size, ts;
    double pts;
    switch(cmd) {
    case STREAM_CTRL_GET_SIZE:
        size = avio_size(avio);
        if(size >= 0) {
            *(uint64_t *)arg = size;
            return 1;
        }
        break;
    case STREAM_CTRL_SEEK_TO_TIME:
        pts = *(double *)arg;
        ts = pts * AV_TIME_BASE;
        ts = avio_seek_time(avio, -1, ts, 0);
        if (ts >= 0)
            return 1;
        break;
    }
    return STREAM_UNSUPPORTED;
}

static void close_f(stream_t *stream)
{
    AVIOContext *avio = stream->priv;
    /* NOTE: As of 2011 write streams must be manually flushed before close.
     * Currently write_buffer() always flushes them after writing.
     * avio_close() could return an error, but we have no way to return that
     * with the current stream API.
     */
    avio_close(avio);
}

static const char * const prefix[] = { "lavf://", "ffmpeg://" };

static int open_f(stream_t *stream, int mode, void *opts, int *file_format)
{
    int flags = 0;
    const char *filename;
    AVIOContext *avio = NULL;
    int res = STREAM_ERROR;

    if (mode == STREAM_READ)
        flags = AVIO_FLAG_READ;
    else if (mode == STREAM_WRITE)
        flags = AVIO_FLAG_WRITE;
    else {
        mp_msg(MSGT_OPEN, MSGL_ERR, "[ffmpeg] Unknown open mode %d\n", mode);
        res = STREAM_UNSUPPORTED;
        goto out;
    }

    if (stream->url)
        filename = stream->url;
    else {
        mp_msg(MSGT_OPEN, MSGL_ERR, "[ffmpeg] No URL\n");
        goto out;
    }
    for (int i = 0; i < sizeof(prefix) / sizeof(prefix[0]); i++)
        if (!strncmp(filename, prefix[i], strlen(prefix[i])))
            filename += strlen(prefix[i]);
    if (!strncmp(filename, "rtsp:", 5)) {
        /* This is handled as a special demuxer, without a separate
         * stream layer. demux_lavf will do all the real work.
         */
        stream->type = STREAMTYPE_STREAM;
        stream->seek = NULL;
        *file_format = DEMUXER_TYPE_LAVF;
        stream->lavf_type = "rtsp";
        return STREAM_OK;
    }
    mp_msg(MSGT_OPEN, MSGL_V, "[ffmpeg] Opening %s\n", filename);

    if (avio_open(&avio, filename, flags) < 0)
        goto out;

    char *rtmp[] = {"rtmp:", "rtmpt:", "rtmpe:", "rtmpte:", "rtmps:"};
    for (int i = 0; i < FF_ARRAY_ELEMS(rtmp); i++)
        if (!strncmp(filename, rtmp[i], strlen(rtmp[i]))) {
            *file_format = DEMUXER_TYPE_LAVF;
            stream->lavf_type = "flv";
        }
    stream->priv = avio;
    int64_t size = avio_size(avio);
    if (size >= 0)
        stream->end_pos = size;
    stream->type = STREAMTYPE_FILE;
    stream->seek = seek;
    if (!avio->seekable) {
        stream->type = STREAMTYPE_STREAM;
        stream->seek = NULL;
    }
    stream->fill_buffer = fill_buffer;
    stream->write_buffer = write_buffer;
    stream->control = control;
    stream->close = close_f;
    // enable cache (should be avoided for files, but no way to detect this)
    stream->streaming = true;
    res = STREAM_OK;

out:
    return res;
}

const stream_info_t stream_info_ffmpeg = {
  "FFmpeg",
  "ffmpeg",
  "",
  "",
  open_f,
  { "lavf", "ffmpeg", "rtmp", "rtsp", "http", "https", NULL },
  NULL,
  1 // Urls are an option string
};