1
0
mirror of https://github.com/mpv-player/mpv synced 2024-12-23 23:32:26 +00:00
mpv/stream/stream_lavf.c
wm4 aa87c143cb stream: remove chaos related to writeable streams
For some reason, we support writeable streams. (Only encoding uses that,
and the use of it looks messy enough that I want to replace it with FILE
or avio today.)

It's a chaos: most streams do not actually check the mode parameter like
they should. Simplify it, and let streams signal availability of write
mode by setting a flag in the stream info struct.
2014-05-24 16:17:52 +02:00

326 lines
9.7 KiB
C

/*
* 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 "options/options.h"
#include "options/path.h"
#include "common/msg.h"
#include "stream.h"
#include "options/m_option.h"
#include "cookies.h"
#include "bstr/bstr.h"
#include "talloc.h"
static int open_f(stream_t *stream);
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;
if (avio_seek(avio, newpos, 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) {
*(int64_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);
}
}
return STREAM_UNSUPPORTED;
}
static int interrupt_cb(void *ctx)
{
struct stream *stream = ctx;
return stream_check_interrupt(stream);
}
static const char * const prefix[] = { "lavf://", "ffmpeg://" };
static int open_f(stream_t *stream)
{
struct MPOpts *opts = stream->opts;
AVIOContext *avio = NULL;
int res = STREAM_ERROR;
AVDictionary *dict = NULL;
void *temp = talloc_new(NULL);
stream->seek = NULL;
stream->seekable = false;
int flags = stream->mode == STREAM_WRITE ? AVIO_FLAG_WRITE : AVIO_FLAG_READ;
const char *filename = stream->url;
if (!filename) {
MP_ERR(stream, "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. Note
* that libavformat doesn't even provide a protocol entry for
* this (the rtsp demuxer's probe function checks for a "rtsp:"
* filename prefix), so it has to be handled specially here.
*/
stream->demuxer = "lavf";
stream->lavf_type = "rtsp";
talloc_free(temp);
return STREAM_OK;
}
MP_VERBOSE(stream, "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 (opts->network_useragent)
av_dict_set(&dict, "user-agent", opts->network_useragent, 0);
if (opts->network_cookies_enabled) {
char *file = opts->network_cookies_file;
if (file && file[0])
file = mp_get_user_path(temp, stream->global, file);
char *cookies = cookies_lavf(temp, stream->log, file);
if (cookies && cookies[0])
av_dict_set(&dict, "cookies", cookies, 0);
}
av_dict_set(&dict, "tls_verify", opts->network_tls_verify ? "1" : "0", 0);
if (opts->network_tls_ca_file)
av_dict_set(&dict, "ca_file", opts->network_tls_ca_file, 0);
char *cust_headers = talloc_strdup(temp, "");
if (opts->network_referrer) {
cust_headers = talloc_asprintf_append(cust_headers, "Referer: %s\r\n",
opts->network_referrer);
}
if (opts->network_http_header_fields) {
for (int n = 0; opts->network_http_header_fields[n]; n++) {
cust_headers = talloc_asprintf_append(cust_headers, "%s\r\n",
opts->network_http_header_fields[n]);
}
}
if (strlen(cust_headers))
av_dict_set(&dict, "headers", cust_headers, 0);
av_dict_set(&dict, "icy", "1", 0);
AVIOInterruptCB cb = {
.callback = interrupt_cb,
.opaque = stream,
};
int err = avio_open2(&avio, filename, flags, &cb, &dict);
if (err < 0) {
if (err == AVERROR_PROTOCOL_NOT_FOUND)
MP_ERR(stream, "Protocol not found. Make sure"
" ffmpeg/Libav is compiled with networking support.\n");
goto out;
}
AVDictionaryEntry *t = NULL;
while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
MP_VERBOSE(stream, "Could not set stream option %s=%s\n",
t->key, t->value);
}
if (avio->av_class) {
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);
}
}
if (strncmp(filename, "rtmp", 4) == 0) {
stream->demuxer = "lavf";
stream->lavf_type = "flv";
}
stream->priv = avio;
stream->seekable = avio->seekable;
stream->seek = stream->seekable ? 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, "icy-%.*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 (!avio->av_class)
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 = {
.name = "ffmpeg",
.open = open_f,
.protocols = (const char*[]){
"lavf", "ffmpeg", "rtmp", "rtsp", "http", "https", "mms", "mmst", "mmsh",
"mmshttp", "udp", "ftp", "rtp", "httpproxy", "hls", "rtmpe", "rtmps",
"rtmpt", "rtmpte", "rtmpts", "srtp", "tcp", "udp", "tls", "unix", "sftp",
"md5",
NULL },
.can_write = true,
};