mpv/demux/demux_playlist.c

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/*
* This file is part of mpv.
*
Relicense some non-MPlayer source files to LGPL 2.1 or later This covers source files which were added in mplayer2 and mpv times only, and where all code is covered by LGPL relicensing agreements. There are probably more files to which this applies, but I'm being conservative here. A file named ao_sdl.c exists in MPlayer too, but the mpv one is a complete rewrite, and was added some time after the original ao_sdl.c was removed. The same applies to vo_sdl.c, for which the SDL2 API is radically different in addition (MPlayer supports SDL 1.2 only). common.c contains only code written by me. But common.h is a strange case: although it originally was named mp_common.h and exists in MPlayer too, by now it contains only definitions written by uau and me. The exceptions are the CONTROL_ defines - thus not changing the license of common.h yet. codec_tags.c contained once large tables generated from MPlayer's codecs.conf, but all of these tables were removed. From demux_playlist.c I'm removing a code fragment from someone who was not asked; this probably could be done later (see commit 15dccc37). misc.c is a bit complicated to reason about (it was split off mplayer.c and thus contains random functions out of this file), but actually all functions have been added post-MPlayer. Except get_relative_time(), which was written by uau, but looks similar to 3 different versions of something similar in each of the Unix/win32/OSX timer source files. I'm not sure what that means in regards to copyright, so I've just moved it into another still-GPL source file for now. screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but they're all gone.
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* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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
Relicense some non-MPlayer source files to LGPL 2.1 or later This covers source files which were added in mplayer2 and mpv times only, and where all code is covered by LGPL relicensing agreements. There are probably more files to which this applies, but I'm being conservative here. A file named ao_sdl.c exists in MPlayer too, but the mpv one is a complete rewrite, and was added some time after the original ao_sdl.c was removed. The same applies to vo_sdl.c, for which the SDL2 API is radically different in addition (MPlayer supports SDL 1.2 only). common.c contains only code written by me. But common.h is a strange case: although it originally was named mp_common.h and exists in MPlayer too, by now it contains only definitions written by uau and me. The exceptions are the CONTROL_ defines - thus not changing the license of common.h yet. codec_tags.c contained once large tables generated from MPlayer's codecs.conf, but all of these tables were removed. From demux_playlist.c I'm removing a code fragment from someone who was not asked; this probably could be done later (see commit 15dccc37). misc.c is a bit complicated to reason about (it was split off mplayer.c and thus contains random functions out of this file), but actually all functions have been added post-MPlayer. Except get_relative_time(), which was written by uau, but looks similar to 3 different versions of something similar in each of the Unix/win32/OSX timer source files. I'm not sure what that means in regards to copyright, so I've just moved it into another still-GPL source file for now. screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but they're all gone.
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* GNU Lesser General Public License for more details.
*
Relicense some non-MPlayer source files to LGPL 2.1 or later This covers source files which were added in mplayer2 and mpv times only, and where all code is covered by LGPL relicensing agreements. There are probably more files to which this applies, but I'm being conservative here. A file named ao_sdl.c exists in MPlayer too, but the mpv one is a complete rewrite, and was added some time after the original ao_sdl.c was removed. The same applies to vo_sdl.c, for which the SDL2 API is radically different in addition (MPlayer supports SDL 1.2 only). common.c contains only code written by me. But common.h is a strange case: although it originally was named mp_common.h and exists in MPlayer too, by now it contains only definitions written by uau and me. The exceptions are the CONTROL_ defines - thus not changing the license of common.h yet. codec_tags.c contained once large tables generated from MPlayer's codecs.conf, but all of these tables were removed. From demux_playlist.c I'm removing a code fragment from someone who was not asked; this probably could be done later (see commit 15dccc37). misc.c is a bit complicated to reason about (it was split off mplayer.c and thus contains random functions out of this file), but actually all functions have been added post-MPlayer. Except get_relative_time(), which was written by uau, but looks similar to 3 different versions of something similar in each of the Unix/win32/OSX timer source files. I'm not sure what that means in regards to copyright, so I've just moved it into another still-GPL source file for now. screenshot.c once had some minor parts of MPlayer's vf_screenshot.c, but they're all gone.
2016-01-19 17:36:06 +00:00
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <dirent.h>
#include <libavutil/common.h>
#include "config.h"
#include "common/common.h"
#include "options/options.h"
#include "common/msg.h"
#include "common/playlist.h"
#include "misc/thread_tools.h"
#include "options/path.h"
#include "stream/stream.h"
#include "osdep/io.h"
#include "misc/natural_sort.h"
#include "demux.h"
#define PROBE_SIZE (8 * 1024)
static bool check_mimetype(struct stream *s, const char *const *list)
{
if (s->mime_type) {
for (int n = 0; list && list[n]; n++) {
if (strcasecmp(s->mime_type, list[n]) == 0)
return true;
}
}
return false;
}
struct pl_parser {
struct mp_log *log;
struct stream *s;
char buffer[512 * 1024];
int utf16;
struct playlist *pl;
bool error;
bool probing;
bool force;
bool add_base;
enum demux_check check_level;
struct stream *real_stream;
char *format;
};
static uint16_t stream_read_word_endian(stream_t *s, bool big_endian)
{
unsigned int y = stream_read_char(s);
y = (y << 8) | stream_read_char(s);
if (!big_endian)
y = ((y >> 8) & 0xFF) | (y << 8);
return y;
}
// Read characters until the next '\n' (including), or until the buffer in s is
// exhausted.
static int read_characters(stream_t *s, uint8_t *dst, int dstsize, int utf16)
{
if (utf16 == 1 || utf16 == 2) {
uint8_t *cur = dst;
while (1) {
if ((cur - dst) + 8 >= dstsize) // PUT_UTF8 writes max. 8 bytes
return -1; // line too long
uint32_t c;
uint8_t tmp;
GET_UTF16(c, stream_read_word_endian(s, utf16 == 2), return -1;)
if (s->eof)
break; // legitimate EOF; ignore the case of partial reads
PUT_UTF8(c, tmp, *cur++ = tmp;)
if (c == '\n')
break;
}
return cur - dst;
} else {
stream: turn into a ring buffer, make size configurable In some corner cases (see #6802), it can be beneficial to use a larger stream buffer size. Use this as argument to rewrite everything for no reason. Turn stream.c itself into a ring buffer, with configurable size. The latter would have been easily achievable with minimal changes, and the ring buffer is the hard part. There is no reason to have a ring buffer at all, except possibly if ffmpeg don't fix their awful mp4 demuxer, and some subtle issues with demux_mkv.c wanting to seek back by small offsets (the latter was handled with small stream_peek() calls, which are unneeded now). In addition, this turns small forward seeks into reads (where data is simply skipped). Before this commit, only stream_skip() did this (which also mean that stream_skip() simply calls stream_seek() now). Replace all stream_peek() calls with something else (usually stream_read_peek()). The function was a problem, because it returned a pointer to the internal buffer, which is now a ring buffer with wrapping. The new function just copies the data into a buffer, and in some cases requires callers to dynamically allocate memory. (The most common case, demux_lavf.c, required a separate buffer allocation anyway due to FFmpeg "idiosyncrasies".) This is the bulk of the demuxer_* changes. I'm not happy with this. There still isn't a good reason why there should be a ring buffer, that is complex, and most of the time just wastes half of the available memory. Maybe another rewrite soon. It also contains bugs; you're an alpha tester now.
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uint8_t buf[1024];
int buf_len = stream_read_peek(s, buf, sizeof(buf));
uint8_t *end = memchr(buf, '\n', buf_len);
int len = end ? end - buf + 1 : buf_len;
if (len > dstsize)
return -1; // line too long
stream: turn into a ring buffer, make size configurable In some corner cases (see #6802), it can be beneficial to use a larger stream buffer size. Use this as argument to rewrite everything for no reason. Turn stream.c itself into a ring buffer, with configurable size. The latter would have been easily achievable with minimal changes, and the ring buffer is the hard part. There is no reason to have a ring buffer at all, except possibly if ffmpeg don't fix their awful mp4 demuxer, and some subtle issues with demux_mkv.c wanting to seek back by small offsets (the latter was handled with small stream_peek() calls, which are unneeded now). In addition, this turns small forward seeks into reads (where data is simply skipped). Before this commit, only stream_skip() did this (which also mean that stream_skip() simply calls stream_seek() now). Replace all stream_peek() calls with something else (usually stream_read_peek()). The function was a problem, because it returned a pointer to the internal buffer, which is now a ring buffer with wrapping. The new function just copies the data into a buffer, and in some cases requires callers to dynamically allocate memory. (The most common case, demux_lavf.c, required a separate buffer allocation anyway due to FFmpeg "idiosyncrasies".) This is the bulk of the demuxer_* changes. I'm not happy with this. There still isn't a good reason why there should be a ring buffer, that is complex, and most of the time just wastes half of the available memory. Maybe another rewrite soon. It also contains bugs; you're an alpha tester now.
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memcpy(dst, buf, len);
stream_seek_skip(s, stream_tell(s) + len);
return len;
}
}
// On error, or if the line is larger than max-1, return NULL and unset s->eof.
// On EOF, return NULL, and s->eof will be set.
// Otherwise, return the line (including \n or \r\n at the end of the line).
// If the return value is non-NULL, it's always the same as mem.
// utf16: 0: UTF8 or 8 bit legacy, 1: UTF16-LE, 2: UTF16-BE
static char *read_line(stream_t *s, char *mem, int max, int utf16)
{
if (max < 1)
return NULL;
int read = 0;
while (1) {
// Reserve 1 byte of ptr for terminating \0.
int l = read_characters(s, &mem[read], max - read - 1, utf16);
if (l < 0 || memchr(&mem[read], '\0', l)) {
MP_WARN(s, "error reading line\n");
return NULL;
}
read += l;
if (l == 0 || (read > 0 && mem[read - 1] == '\n'))
break;
}
mem[read] = '\0';
if (!stream_read_peek(s, &(char){0}, 1) && read == 0) // legitimate EOF
return NULL;
return mem;
}
static char *pl_get_line0(struct pl_parser *p)
{
char *res = read_line(p->s, p->buffer, sizeof(p->buffer), p->utf16);
if (res) {
int len = strlen(res);
if (len > 0 && res[len - 1] == '\n')
res[len - 1] = '\0';
} else {
p->error |= !p->s->eof;
}
return res;
}
static bstr pl_get_line(struct pl_parser *p)
{
return bstr0(pl_get_line0(p));
}
static void pl_add(struct pl_parser *p, bstr entry)
{
char *s = bstrto0(NULL, entry);
playlist_add_file(p->pl, s);
talloc_free(s);
}
static bool pl_eof(struct pl_parser *p)
{
return p->error || p->s->eof;
}
static bool maybe_text(bstr d)
{
for (int n = 0; n < d.len; n++) {
unsigned char c = d.start[n];
if (c < 32 && c != '\n' && c != '\r' && c != '\t')
return false;
}
return true;
}
static int parse_m3u(struct pl_parser *p)
{
bstr line = bstr_strip(pl_get_line(p));
if (p->probing && !bstr_equals0(line, "#EXTM3U")) {
// Last resort: if the file extension is m3u, it might be headerless.
if (p->check_level == DEMUX_CHECK_UNSAFE) {
char *ext = mp_splitext(p->real_stream->url, NULL);
stream: turn into a ring buffer, make size configurable In some corner cases (see #6802), it can be beneficial to use a larger stream buffer size. Use this as argument to rewrite everything for no reason. Turn stream.c itself into a ring buffer, with configurable size. The latter would have been easily achievable with minimal changes, and the ring buffer is the hard part. There is no reason to have a ring buffer at all, except possibly if ffmpeg don't fix their awful mp4 demuxer, and some subtle issues with demux_mkv.c wanting to seek back by small offsets (the latter was handled with small stream_peek() calls, which are unneeded now). In addition, this turns small forward seeks into reads (where data is simply skipped). Before this commit, only stream_skip() did this (which also mean that stream_skip() simply calls stream_seek() now). Replace all stream_peek() calls with something else (usually stream_read_peek()). The function was a problem, because it returned a pointer to the internal buffer, which is now a ring buffer with wrapping. The new function just copies the data into a buffer, and in some cases requires callers to dynamically allocate memory. (The most common case, demux_lavf.c, required a separate buffer allocation anyway due to FFmpeg "idiosyncrasies".) This is the bulk of the demuxer_* changes. I'm not happy with this. There still isn't a good reason why there should be a ring buffer, that is complex, and most of the time just wastes half of the available memory. Maybe another rewrite soon. It also contains bugs; you're an alpha tester now.
2019-11-06 20:36:02 +00:00
char probe[PROBE_SIZE];
int len = stream_read_peek(p->real_stream, probe, sizeof(probe));
bstr data = {probe, len};
if (ext && data.len > 10 && maybe_text(data)) {
const char *exts[] = {"m3u", "m3u8", NULL};
for (int n = 0; exts[n]; n++) {
if (strcasecmp(ext, exts[n]) == 0)
goto ok;
}
}
}
return -1;
}
ok:
if (p->probing)
return 0;
char *title = NULL;
while (line.len || !pl_eof(p)) {
if (bstr_eatstart0(&line, "#EXTINF:")) {
bstr duration, btitle;
if (bstr_split_tok(line, ",", &duration, &btitle) && btitle.len) {
talloc_free(title);
title = bstrto0(NULL, btitle);
}
} else if (bstr_startswith0(line, "#EXT-X-")) {
p->format = "hls";
} else if (line.len > 0 && !bstr_startswith0(line, "#")) {
char *fn = bstrto0(NULL, line);
struct playlist_entry *e = playlist_entry_new(fn);
talloc_free(fn);
e->title = talloc_steal(e, title);
title = NULL;
playlist_add(p->pl, e);
}
line = bstr_strip(pl_get_line(p));
}
talloc_free(title);
return 0;
}
static int parse_ref_init(struct pl_parser *p)
{
bstr line = bstr_strip(pl_get_line(p));
if (!bstr_equals0(line, "[Reference]"))
return -1;
// ASF http streaming redirection - this is needed because ffmpeg http://
// and mmsh:// can not automatically switch automatically between each
// others. Both protocols use http - MMSH requires special http headers
// to "activate" it, and will in other cases return this playlist.
static const char *const mmsh_types[] = {"audio/x-ms-wax",
"audio/x-ms-wma", "video/x-ms-asf", "video/x-ms-afs", "video/x-ms-wmv",
"video/x-ms-wma", "application/x-mms-framed",
"application/vnd.ms.wms-hdr.asfv1", NULL};
bstr burl = bstr0(p->s->url);
if (bstr_eatstart0(&burl, "http://") && check_mimetype(p->s, mmsh_types)) {
MP_INFO(p, "Redirecting to mmsh://\n");
playlist_add_file(p->pl, talloc_asprintf(p, "mmsh://%.*s", BSTR_P(burl)));
return 0;
}
while (!pl_eof(p)) {
line = bstr_strip(pl_get_line(p));
if (bstr_case_startswith(line, bstr0("Ref"))) {
bstr_split_tok(line, "=", &(bstr){0}, &line);
if (line.len)
pl_add(p, line);
}
}
return 0;
}
static int parse_ini_thing(struct pl_parser *p, const char *header,
const char *entry)
{
bstr line = {0};
while (!line.len && !pl_eof(p))
line = bstr_strip(pl_get_line(p));
if (bstrcasecmp0(line, header) != 0)
return -1;
if (p->probing)
return 0;
while (!pl_eof(p)) {
line = bstr_strip(pl_get_line(p));
bstr key, value;
if (bstr_split_tok(line, "=", &key, &value) &&
bstr_case_startswith(key, bstr0(entry)))
{
value = bstr_strip(value);
if (bstr_startswith0(value, "\"") && bstr_endswith0(value, "\""))
value = bstr_splice(value, 1, -1);
pl_add(p, value);
}
}
return 0;
}
static int parse_pls(struct pl_parser *p)
{
return parse_ini_thing(p, "[playlist]", "File");
}
static int parse_url(struct pl_parser *p)
{
return parse_ini_thing(p, "[InternetShortcut]", "URL");
}
static int parse_txt(struct pl_parser *p)
{
if (!p->force)
return -1;
if (p->probing)
return 0;
MP_WARN(p, "Reading plaintext playlist.\n");
while (!pl_eof(p)) {
bstr line = bstr_strip(pl_get_line(p));
if (line.len == 0)
continue;
pl_add(p, line);
}
return 0;
}
#define MAX_DIR_STACK 20
static bool same_st(struct stat *st1, struct stat *st2)
{
return st1->st_dev == st2->st_dev && st1->st_ino == st2->st_ino;
}
// Return true if this was a readable directory.
static bool scan_dir(struct pl_parser *p, char *path,
struct stat *dir_stack, int num_dir_stack,
char ***files, int *num_files)
{
if (strlen(path) >= 8192 || num_dir_stack == MAX_DIR_STACK)
return false; // things like mount bind loops
DIR *dp = opendir(path);
if (!dp) {
MP_ERR(p, "Could not read directory.\n");
return false;
}
struct dirent *ep;
while ((ep = readdir(dp))) {
if (ep->d_name[0] == '.')
continue;
if (mp_cancel_test(p->s->cancel))
break;
char *file = mp_path_join(p, path, ep->d_name);
struct stat st;
if (stat(file, &st) == 0 && S_ISDIR(st.st_mode)) {
for (int n = 0; n < num_dir_stack; n++) {
if (same_st(&dir_stack[n], &st)) {
MP_VERBOSE(p, "Skip recursive entry: %s\n", file);
goto skip;
}
}
dir_stack[num_dir_stack] = st;
scan_dir(p, file, dir_stack, num_dir_stack + 1, files, num_files);
} else {
MP_TARRAY_APPEND(p, *files, *num_files, file);
}
skip: ;
}
closedir(dp);
return true;
}
static int cmp_filename(const void *a, const void *b)
{
return mp_natural_sort_cmp(*(char **)a, *(char **)b);
}
static int parse_dir(struct pl_parser *p)
{
if (!p->real_stream->is_directory)
return -1;
if (p->probing)
return 0;
char *path = mp_file_get_path(p, bstr0(p->real_stream->url));
if (!path)
return -1;
char **files = NULL;
int num_files = 0;
struct stat dir_stack[MAX_DIR_STACK];
scan_dir(p, path, dir_stack, 0, &files, &num_files);
if (files)
qsort(files, num_files, sizeof(files[0]), cmp_filename);
for (int n = 0; n < num_files; n++)
playlist_add_file(p->pl, files[n]);
p->add_base = false;
return num_files > 0 ? 0 : -1;
}
#define MIME_TYPES(...) \
.mime_types = (const char*const[]){__VA_ARGS__, NULL}
struct pl_format {
const char *name;
int (*parse)(struct pl_parser *p);
const char *const *mime_types;
};
static const struct pl_format formats[] = {
{"directory", parse_dir},
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{"m3u", parse_m3u,
MIME_TYPES("audio/mpegurl", "audio/x-mpegurl", "application/x-mpegurl")},
{"ini", parse_ref_init},
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{"pls", parse_pls,
MIME_TYPES("audio/x-scpls")},
{"url", parse_url},
{"txt", parse_txt},
};
static const struct pl_format *probe_pl(struct pl_parser *p)
{
int64_t start = stream_tell(p->s);
for (int n = 0; n < MP_ARRAY_SIZE(formats); n++) {
const struct pl_format *fmt = &formats[n];
stream_seek(p->s, start);
if (check_mimetype(p->s, fmt->mime_types)) {
MP_VERBOSE(p, "forcing format by mime-type.\n");
p->force = true;
return fmt;
}
if (fmt->parse(p) >= 0)
return fmt;
}
return NULL;
}
static int open_file(struct demuxer *demuxer, enum demux_check check)
{
if (!demuxer->access_references)
return -1;
bool force = check < DEMUX_CHECK_UNSAFE || check == DEMUX_CHECK_REQUEST;
struct pl_parser *p = talloc_zero(NULL, struct pl_parser);
p->log = demuxer->log;
p->pl = talloc_zero(p, struct playlist);
p->real_stream = demuxer->stream;
p->add_base = true;
stream: turn into a ring buffer, make size configurable In some corner cases (see #6802), it can be beneficial to use a larger stream buffer size. Use this as argument to rewrite everything for no reason. Turn stream.c itself into a ring buffer, with configurable size. The latter would have been easily achievable with minimal changes, and the ring buffer is the hard part. There is no reason to have a ring buffer at all, except possibly if ffmpeg don't fix their awful mp4 demuxer, and some subtle issues with demux_mkv.c wanting to seek back by small offsets (the latter was handled with small stream_peek() calls, which are unneeded now). In addition, this turns small forward seeks into reads (where data is simply skipped). Before this commit, only stream_skip() did this (which also mean that stream_skip() simply calls stream_seek() now). Replace all stream_peek() calls with something else (usually stream_read_peek()). The function was a problem, because it returned a pointer to the internal buffer, which is now a ring buffer with wrapping. The new function just copies the data into a buffer, and in some cases requires callers to dynamically allocate memory. (The most common case, demux_lavf.c, required a separate buffer allocation anyway due to FFmpeg "idiosyncrasies".) This is the bulk of the demuxer_* changes. I'm not happy with this. There still isn't a good reason why there should be a ring buffer, that is complex, and most of the time just wastes half of the available memory. Maybe another rewrite soon. It also contains bugs; you're an alpha tester now.
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char probe[PROBE_SIZE];
int probe_len = stream_read_peek(p->real_stream, probe, sizeof(probe));
p->s = stream_memory_open(demuxer->global, probe, probe_len);
p->s->mime_type = demuxer->stream->mime_type;
p->utf16 = stream_skip_bom(p->s);
p->force = force;
p->check_level = check;
p->probing = true;
const struct pl_format *fmt = probe_pl(p);
free_stream(p->s);
playlist_clear(p->pl);
if (!fmt) {
talloc_free(p);
return -1;
}
p->probing = false;
p->error = false;
p->s = demuxer->stream;
p->utf16 = stream_skip_bom(p->s);
bool ok = fmt->parse(p) >= 0 && !p->error;
if (p->add_base)
playlist_add_base_path(p->pl, mp_dirname(demuxer->filename));
playlist_set_stream_flags(p->pl, demuxer->stream_origin);
demuxer->playlist = talloc_steal(demuxer, p->pl);
demuxer->filetype = p->format ? p->format : fmt->name;
demuxer->fully_read = true;
talloc_free(p);
if (ok)
demux_close_stream(demuxer);
return ok ? 0 : -1;
}
const struct demuxer_desc demuxer_desc_playlist = {
.name = "playlist",
.desc = "Playlist file",
.open = open_file,
};