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mpv/stream/stream_lavf.c

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/*
* 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 <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavutil/opt.h>
#include "config.h"
#include "mpvcore/options.h"
#include "mpvcore/mp_msg.h"
#include "stream.h"
#include "mpvcore/m_option.h"
#include "cookies.h"
#include "mpvcore/bstr.h"
#include "mpvcore/mp_talloc.h"
static int open_f(stream_t *stream, int mode);
static char **read_icy(stream_t *stream);
static int fill_buffer(stream_t *s, char *buffer, int max_len)
{
AVIOContext *avio = s->priv;
if (!avio)
return -1;
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;
if (!avio)
return -1;
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;
if (!avio)
return -1;
s->pos = newpos;
if (avio_seek(avio, s->pos, SEEK_SET) < 0) {
return 0;
}
return 1;
}
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.
*/
if (avio)
avio_close(avio);
}
static int control(stream_t *s, int cmd, void *arg)
{
AVIOContext *avio = s->priv;
if (!avio && cmd != STREAM_CTRL_RECONNECT)
return -1;
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;
case STREAM_CTRL_GET_METADATA: {
*(char ***)arg = read_icy(s);
if (!*(char ***)arg)
break;
return 1;
}
case STREAM_CTRL_RECONNECT: {
if (avio && avio->write_flag)
break; // don't bother with this
// avio doesn't seem to support this - emulate it by reopening
close_f(s);
s->priv = NULL;
return open_f(s, STREAM_READ);
}
}
return STREAM_UNSUPPORTED;
}
static bool mp_avio_has_opts(AVIOContext *avio)
{
#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(54, 0, 0)
return avio->av_class != NULL;
#else
return false;
#endif
}
static const char * const prefix[] = { "lavf://", "ffmpeg://" };
static int open_f(stream_t *stream, int mode)
{
int flags = 0;
AVIOContext *avio = NULL;
int res = STREAM_ERROR;
AVDictionary *dict = NULL;
void *temp = talloc_new(NULL);
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;
}
const char *filename = stream->url;
if (!filename) {
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->seek = NULL;
stream->demuxer = "lavf";
stream->lavf_type = "rtsp";
return STREAM_OK;
}
mp_msg(MSGT_OPEN, MSGL_V, "[ffmpeg] Opening %s\n", filename);
// Replace "mms://" with "mmsh://", so that most mms:// URLs just work.
bstr b_filename = bstr0(filename);
if (bstr_eatstart0(&b_filename, "mms://") ||
bstr_eatstart0(&b_filename, "mmshttp://"))
{
filename = talloc_asprintf(temp, "mmsh://%.*s", BSTR_P(b_filename));
}
// HTTP specific options (other protocols ignore them)
if (network_useragent)
av_dict_set(&dict, "user-agent", network_useragent, 0);
if (network_cookies_enabled)
av_dict_set(&dict, "cookies", talloc_steal(temp, cookies_lavf()), 0);
char *cust_headers = talloc_strdup(temp, "");
if (network_referrer) {
cust_headers = talloc_asprintf_append(cust_headers, "Referer: %s\r\n",
network_referrer);
}
if (network_http_header_fields) {
for (int n = 0; network_http_header_fields[n]; n++) {
cust_headers = talloc_asprintf_append(cust_headers, "%s\r\n",
network_http_header_fields[n]);
}
}
if (strlen(cust_headers))
av_dict_set(&dict, "headers", cust_headers, 0);
av_dict_set(&dict, "icy", "1", 0);
int err = avio_open2(&avio, filename, flags, NULL, &dict);
if (err < 0) {
if (err == AVERROR_PROTOCOL_NOT_FOUND)
mp_msg(MSGT_OPEN, MSGL_ERR, "[ffmpeg] Protocol not found. Make sure"
" ffmpeg/Libav is compiled with networking support.\n");
goto out;
}
if (mp_avio_has_opts(avio)) {
uint8_t *mt = NULL;
if (av_opt_get(avio, "mime_type", AV_OPT_SEARCH_CHILDREN, &mt) >= 0) {
stream->mime_type = talloc_strdup(stream, mt);
av_free(mt);
}
}
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]))) {
stream->demuxer = "lavf";
stream->lavf_type = "flv";
}
stream->priv = avio;
int64_t size = avio_size(avio);
if (size >= 0)
stream->end_pos = size;
stream->seek = seek;
if (!avio->seekable)
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:
av_dict_free(&dict);
talloc_free(temp);
return res;
}
static void append_meta(char ***info, int *num_info, bstr name, bstr val)
{
if (name.len && val.len) {
char *cname = talloc_asprintf(*info, "%.*s", BSTR_P(name));
char *cval = talloc_asprintf(*info, "%.*s", BSTR_P(val));
MP_TARRAY_APPEND(NULL, *info, *num_info, cname);
MP_TARRAY_APPEND(NULL, *info, *num_info, cval);
}
}
static char **read_icy(stream_t *s)
{
AVIOContext *avio = s->priv;
if (!mp_avio_has_opts(avio))
return NULL;
uint8_t *icy_header = NULL;
if (av_opt_get(avio, "icy_metadata_headers", AV_OPT_SEARCH_CHILDREN,
&icy_header) < 0)
icy_header = NULL;
uint8_t *icy_packet;
if (av_opt_get(avio, "icy_metadata_packet", AV_OPT_SEARCH_CHILDREN,
&icy_packet) < 0)
icy_packet = NULL;
char **res = NULL;
if ((!icy_header || !icy_header[0]) && (!icy_packet || !icy_packet[0]))
goto done;
res = talloc_new(NULL);
int num_res = 0;
bstr header = bstr0(icy_header);
while (header.len) {
bstr line = bstr_strip_linebreaks(bstr_getline(header, &header));
bstr name, val;
if (bstr_split_tok(line, ": ", &name, &val)) {
bstr_eatstart0(&name, "icy-");
append_meta(&res, &num_res, name, val);
}
}
bstr packet = bstr0(icy_packet);
bstr head = bstr0("StreamTitle='");
int i = bstr_find(packet, head);
if (i >= 0) {
packet = bstr_cut(packet, i + head.len);
int end = bstrchr(packet, '\'');
packet = bstr_splice(packet, 0, end);
append_meta(&res, &num_res, bstr0("title"), packet);
}
if (res) {
MP_TARRAY_APPEND(NULL, res, num_res, NULL);
MP_TARRAY_APPEND(NULL, res, num_res, NULL);
}
done:
av_free(icy_header);
av_free(icy_packet);
return res;
}
const stream_info_t stream_info_ffmpeg = {
"ffmpeg",
open_f,
{ "lavf", "ffmpeg", "rtmp", "rtsp", "http", "https", "mms", "mmst", "mmsh",
"mmshttp", "udp", "ftp", "rtp", "httpproxy", NULL },
};
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