stream/stream_ffmpeg.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "config.h"
  20
  21 #include "libavformat/avformat.h"
  22 #include "libavformat/avio.h"
  23 #include "mp_msg.h"
  24 #include "stream.h"
  25 #include "m_option.h"
  26 #include "m_struct.h"
  27
  28 static int fill_buffer(stream_t *s, char *buffer, int max_len)
  29 {
  30     int r = url_read(s->priv, buffer, max_len);
  31     return (r <= 0) ? -1 : r;
  32 }
  33
  34 static int write_buffer(stream_t *s, char *buffer, int len)
  35 {
  36     int r = url_write(s->priv, buffer, len);
  37     return (r <= 0) ? -1 : r;
  38 }
  39
  40 static int seek(stream_t *s, off_t newpos)
  41 {
  42     s->pos = newpos;
  43     if (url_seek(s->priv, s->pos, SEEK_SET) < 0) {
  44         s->eof = 1;
  45         return 0;
  46     }
  47     return 1;
  48 }
  49
  50 static int control(stream_t *s, int cmd, void *arg)
  51 {
  52     int64_t size;
  53     switch(cmd) {
  54     case STREAM_CTRL_GET_SIZE:
  55         size = url_filesize(s->priv);
  56         if(size >= 0) {
  57             *(off_t *)arg = size;
  58             return 1;
  59         }
  60     }
  61     return STREAM_UNSUPPORTED;
  62 }
  63
  64 static void close_f(stream_t *stream)
  65 {
  66     url_close(stream->priv);
  67 }
  68
  69 static const char prefix[] = "ffmpeg://";
  70
  71 static int open_f(stream_t *stream, int mode, void *opts, int *file_format)
  72 {
  73     int flags = 0;
  74     const char *filename;
  75     URLContext *ctx = NULL;
  76     int res = STREAM_ERROR;
  77     int64_t size;
  78     int dummy;
  79
  80     av_register_all();
  81     if (mode == STREAM_READ)
  82         flags = URL_RDONLY;
  83     else if (mode == STREAM_WRITE)
  84         flags = URL_WRONLY;
  85     else {
  86         mp_msg(MSGT_OPEN, MSGL_ERR, "[ffmpeg] Unknown open mode %d\n", mode);
  87         res = STREAM_UNSUPPORTED;
  88         goto out;
  89     }
  90
  91     if (stream->url)
  92         filename = stream->url;
  93     else {
  94         mp_msg(MSGT_OPEN, MSGL_ERR, "[ffmpeg] No URL\n");
  95         goto out;
  96     }
  97     if (!strncmp(filename, prefix, strlen(prefix)))
  98         filename += strlen(prefix);
  99     dummy = !strncmp(filename, "rtsp:", 5);
 100     mp_msg(MSGT_OPEN, MSGL_V, "[ffmpeg] Opening %s\n", filename);
 101
 102     if (!dummy && url_open(&ctx, filename, flags) < 0)
 103         goto out;
 104
 105     stream->priv = ctx;
 106     size = dummy ? 0 : url_filesize(ctx);
 107     if (size >= 0)
 108         stream->end_pos = size;
 109     stream->type = STREAMTYPE_FILE;
 110     stream->seek = seek;
 111     if (dummy || ctx->is_streamed) {
 112         stream->type = STREAMTYPE_STREAM;
 113         stream->seek = NULL;
 114     }
 115     if (!dummy) {
 116         stream->fill_buffer = fill_buffer;
 117         stream->write_buffer = write_buffer;
 118         stream->control = control;
 119         stream->close = close_f;
 120     }
 121     res = STREAM_OK;
 122
 123 out:
 124     return res;
 125 }
 126
 127 const stream_info_t stream_info_ffmpeg = {
 128   "FFmpeg",
 129   "ffmpeg",
 130   "",
 131   "",
 132   open_f,
 133   { "ffmpeg", "rtmp", NULL },
 134   NULL,
 135   1 // Urls are an option string
 136 };