*
* Author: Jean-Paul Saman <jpsaman _AT_ videolan _DOT_ org>
*
- * This program 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
+ * This program 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.
*
* This program 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.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
#endif
#include <limits.h>
-#include <errno.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <assert.h>
+#include <errno.h>
#include <gcrypt.h>
#include <vlc_threads.h>
char *url;
char *psz_key_path; /* url key path */
- uint8_t psz_AES_key[16]; /* AES-128 */
+ uint8_t aes_key[16]; /* AES-128 */
bool b_key_loaded;
vlc_mutex_t lock;
/****************************************************************************
*
****************************************************************************/
-static const char *const ext[] = {
- "#EXT-X-TARGETDURATION",
- "#EXT-X-MEDIA-SEQUENCE",
- "#EXT-X-KEY",
- "#EXT-X-ALLOW-CACHE",
- "#EXT-X-ENDLIST",
- "#EXT-X-STREAM-INF",
- "#EXT-X-DISCONTINUITY",
- "#EXT-X-VERSION"
-};
-
static bool isHTTPLiveStreaming(stream_t *s)
{
- const uint8_t *peek, *peek_end;
+ const uint8_t *peek;
- int64_t i_size = stream_Peek(s->p_source, &peek, 46);
- if (i_size < 1)
+ int size = stream_Peek(s->p_source, &peek, 46);
+ if (size < 7)
return false;
- if (strncasecmp((const char*)peek, "#EXTM3U", 7) != 0)
+ if (memcmp(peek, "#EXTM3U", 7) != 0)
return false;
+ peek += 7;
+ size -= 7;
+
/* Parse stream and search for
* EXT-X-TARGETDURATION or EXT-X-STREAM-INF tag, see
* http://tools.ietf.org/html/draft-pantos-http-live-streaming-04#page-8 */
- peek_end = peek + i_size;
- while(peek <= peek_end)
- {
- if (*peek == '#')
+ while (size--)
+ {
+ static const char *const ext[] = {
+ "TARGETDURATION",
+ "MEDIA-SEQUENCE",
+ "KEY",
+ "ALLOW-CACHE",
+ "ENDLIST",
+ "STREAM-INF",
+ "DISCONTINUITY",
+ "VERSION"
+ };
+
+ if (*peek++ != '#')
+ continue;
+
+ if (size < 6)
+ continue;
+
+ if (memcmp(peek, "EXT-X-", 6))
+ continue;
+
+ peek += 6;
+ size -= 6;
+
+ for (size_t i = 0; i < ARRAY_SIZE(ext); i++)
{
- for (unsigned int i = 0; i < ARRAY_SIZE(ext); i++)
- {
- char *p = strstr((const char*)peek, ext[i]);
- if (p != NULL)
- return true;
- }
+ size_t len = strlen(ext[i]);
+ if (size < 0 || (size_t)size < len)
+ continue;
+ if (!memcmp(peek, ext[i], len))
+ return true;
}
- peek++;
- };
+ }
return false;
}
begin = p;
do
{
- if (strncasecmp(begin, attr, strlen(attr)) == 0)
+ if (strncasecmp(begin, attr, strlen(attr)) == 0
+ && begin[strlen(attr)] == '=')
{
/* <attr>=<value>[,]* */
p = strchr(begin, ',');
return NULL;
}
-static int hex2int(char c)
+static int string_to_IV(char *string_hexa, uint8_t iv[AES_BLOCK_SIZE])
{
- if (c >= '0' && c <= '9')
- return c - '0';
- if (c >= 'A' && c <= 'F')
- return c - 'A' + 10;
- if (c >= 'a' && c <= 'f')
- return c - 'a' + 10;
- return -1;
-}
-
-static int string_to_IV(const char *string_hexa, uint8_t iv[AES_BLOCK_SIZE])
-{
- const char *p = string_hexa;
- uint8_t *d = iv;
- unsigned int c;
-
- if (*p++ != '0')
+ unsigned long long iv_hi, iv_lo;
+ char *end = NULL;
+ if (*string_hexa++ != '0')
return VLC_EGENERIC;
- if (*p++ != 'x')
+ if (*string_hexa != 'x' && *string_hexa != 'X')
return VLC_EGENERIC;
- while (*p && *(p+1))
- {
- c = hex2int(*p++) << 4;
- c |= hex2int(*p++);
- *d++ = c;
+ string_hexa++;
+
+ size_t len = strlen(string_hexa);
+ if (len <= 16) {
+ iv_hi = 0;
+ iv_lo = strtoull(string_hexa, &end, 16);
+ if (end)
+ return VLC_EGENERIC;
+ } else {
+ iv_lo = strtoull(&string_hexa[len-16], NULL, 16);
+ if (end)
+ return VLC_EGENERIC;
+ string_hexa[len-16] = '\0';
+ iv_hi = strtoull(string_hexa, NULL, 16);
+ if (end)
+ return VLC_EGENERIC;
+ }
+
+ for (int i = 7; i >= 0 ; --i) {
+ iv[ i] = iv_hi & 0xff;
+ iv[8+i] = iv_lo & 0xff;
+ iv_hi >>= 8;
+ iv_lo >>= 8;
}
return VLC_SUCCESS;
return VLC_EGENERIC;
int value;
+ char *endptr;
if (hls->version < 3)
{
- value = strtol(token, NULL, 10);
- if (errno == ERANGE)
- {
- *duration = -1;
- return VLC_EGENERIC;
- }
- *duration = value;
+ errno = 0;
+ value = strtol(token, &endptr, 10);
+ if (token == endptr || errno == ERANGE)
+ {
+ *duration = -1;
+ return VLC_EGENERIC;
+ }
+ *duration = value;
}
else
{
- double d = strtod(token, (char **) NULL);
- if (errno == ERANGE)
+ errno = 0;
+ double d = strtof(token, &endptr);
+ if (token == endptr || errno == ERANGE)
{
*duration = -1;
return VLC_EGENERIC;
value = ((int)d) + 1;
else
value = ((int)d);
+ *duration = value;
}
/* Ignore the rest of the line */
assert(*hls == NULL);
attr = parse_Attributes(p_read, "PROGRAM-ID");
- if (attr == NULL)
+ if (attr)
{
- msg_Err(s, "#EXT-X-STREAM-INF: expected PROGRAM-ID=<value>");
- return VLC_EGENERIC;
+ id = atol(attr);
+ free(attr);
}
- id = atol(attr);
- free(attr);
+ else
+ id = 0;
attr = parse_Attributes(p_read, "BANDWIDTH");
if (attr == NULL)
if (end != NULL)
*end = 0;
}
- hls->psz_current_key_path = strdup(uri);
+ /* For absolute URI, just duplicate it
+ * don't limit to HTTP, maybe some sanity checking
+ * should be done more in here? */
+ if( strstr( uri , "://" ) )
+ hls->psz_current_key_path = strdup( uri );
+ else
+ hls->psz_current_key_path = relative_URI(hls->url, uri);
free(value);
value = iv = parse_Attributes(p_read, "IV");
*/
if (string_to_IV(iv, hls->psz_AES_IV) == VLC_EGENERIC)
+ {
+ msg_Err(s, "IV invalid");
err = VLC_EGENERIC;
+ }
else
hls->b_iv_loaded = true;
free(value);
/* M3U8 Meta Index file */
do {
+ bool failed_to_download_stream_m3u8 = false;
+
/* Next line */
line = ReadLine(p_begin, &p_read, p_end - p_begin);
if (line == NULL)
}
else
{
+ bool new_stream_added = false;
hls_stream_t *hls = NULL;
err = parse_StreamInformation(s, &streams, &hls, line, uri);
+ if (err == VLC_SUCCESS)
+ new_stream_added = true;
+
free(uri);
/* Download playlist file from server */
uint8_t *buf = NULL;
ssize_t len = read_M3U8_from_url(s, hls->url, &buf);
if (len < 0)
- err = VLC_EGENERIC;
+ {
+ msg_Warn(s, "failed to read %s, continue for other streams", hls->url);
+ failed_to_download_stream_m3u8 = true;
+
+ /* remove stream just added */
+ if (new_stream_added)
+ vlc_array_remove(streams, vlc_array_count(streams) - 1);
+
+ /* ignore download error, so we have chance to try other streams */
+ err = VLC_SUCCESS;
+ }
else
{
/* Parse HLS m3u8 content. */
} while (err == VLC_SUCCESS);
+ size_t stream_count = vlc_array_count(streams);
+ msg_Dbg(s, "%d streams loaded in Meta playlist", (int)stream_count);
+ if (stream_count == 0)
+ {
+ msg_Err(s, "No playable streams found in Meta playlist");
+ err = VLC_EGENERIC;
+ }
}
else
{
assert(hls);
/* */
+ bool media_sequence_loaded = false;
int segment_duration = -1;
do
{
else if (strncmp(line, "#EXT-X-TARGETDURATION", 21) == 0)
err = parse_TargetDuration(s, hls, line);
else if (strncmp(line, "#EXT-X-MEDIA-SEQUENCE", 21) == 0)
- err = parse_MediaSequence(s, hls, line);
+ {
+ /* A Playlist file MUST NOT contain more than one EXT-X-MEDIA-SEQUENCE tag. */
+ /* We only care about first one */
+ if (!media_sequence_loaded)
+ {
+ err = parse_MediaSequence(s, hls, line);
+ media_sequence_loaded = true;
+ }
+ }
else if (strncmp(line, "#EXT-X-KEY", 10) == 0)
err = parse_Key(s, hls, line);
else if (strncmp(line, "#EXT-X-PROGRAM-DATE-TIME", 24) == 0)
static int hls_DownloadSegmentKey(stream_t *s, segment_t *seg)
{
- uint8_t aeskey[32]; /* AES-512 can use up to 32 bytes */
- ssize_t len;
-
stream_t *p_m3u8 = stream_UrlNew(s, seg->psz_key_path);
if (p_m3u8 == NULL)
{
return VLC_EGENERIC;
}
- len = stream_Read(p_m3u8, aeskey, sizeof(aeskey));
+ int len = stream_Read(p_m3u8, seg->aes_key, sizeof(seg->aes_key));
+ stream_Delete(p_m3u8);
if (len != AES_BLOCK_SIZE)
{
- msg_Err(s, "The AES key loaded doesn't have the right size (%zd)", len);
- stream_Delete(p_m3u8);
+ msg_Err(s, "The AES key loaded doesn't have the right size (%d)", len);
return VLC_EGENERIC;
}
- memcpy(seg->psz_AES_key, aeskey, AES_BLOCK_SIZE);
-
- stream_Delete(p_m3u8);
-
return VLC_SUCCESS;
}
* try to copy it, and don't load the key */
if (prev_seg && prev_seg->b_key_loaded && strcmp(seg->psz_key_path, prev_seg->psz_key_path) == 0)
{
- memcpy(seg->psz_AES_key, prev_seg->psz_AES_key, AES_BLOCK_SIZE);
+ memcpy(seg->aes_key, prev_seg->aes_key, AES_BLOCK_SIZE);
seg->b_key_loaded = true;
continue;
}
}
/* Set key */
- i_gcrypt_err = gcry_cipher_setkey(aes_ctx, segment->psz_AES_key,
- sizeof(segment->psz_AES_key));
+ i_gcrypt_err = gcry_cipher_setkey(aes_ctx, segment->aes_key,
+ sizeof(segment->aes_key));
if (i_gcrypt_err)
{
msg_Err(s, "gcry_cipher_setkey failed: %s", gpg_strerror(i_gcrypt_err));
return err;
}
-/* Reload playlist */
-static int hls_UpdatePlaylist(stream_t *s, hls_stream_t *hls_new, hls_stream_t **hls)
+/* Update hls_old (an existing member of p_sys->hls_stream) to match hls_new
+ (which represents a downloaded, perhaps newer version of the same playlist) */
+static int hls_UpdatePlaylist(stream_t *s, hls_stream_t *hls_new, hls_stream_t *hls_old)
{
int count = vlc_array_count(hls_new->segments);
msg_Info(s, "updating hls stream (program-id=%d, bandwidth=%"PRIu64") has %d segments",
hls_new->id, hls_new->bandwidth, count);
+ vlc_mutex_lock(&hls_old->lock);
for (int n = 0; n < count; n++)
{
segment_t *p = segment_GetSegment(hls_new, n);
if (p == NULL) return VLC_EGENERIC;
- vlc_mutex_lock(&(*hls)->lock);
- segment_t *segment = segment_Find(*hls, p->sequence);
+ segment_t *segment = segment_Find(hls_old, p->sequence);
if (segment)
{
vlc_mutex_lock(&segment->lock);
continue;
}
/* We must free the content, because if the key was not downloaded, content can't be decrypted */
- if (segment->data)
+ if ((p->psz_key_path || p->b_key_loaded) &&
+ segment->data)
{
block_Release(segment->data);
segment->data = NULL;
}
else
{
- int last = vlc_array_count((*hls)->segments) - 1;
- segment_t *l = segment_GetSegment(*hls, last);
- if (l == NULL) goto fail_and_unlock;
+ int last = vlc_array_count(hls_old->segments) - 1;
+ segment_t *l = segment_GetSegment(hls_old, last);
+ if (l == NULL) {
+ vlc_mutex_unlock(&hls_old->lock);
+ return VLC_EGENERIC;
+ }
if ((l->sequence + 1) != p->sequence)
{
msg_Err(s, "gap in sequence numbers found: new=%d expected %d",
p->sequence, l->sequence+1);
}
- vlc_array_append((*hls)->segments, p);
+ vlc_array_append(hls_old->segments, p);
msg_Info(s, "- segment %d appended", p->sequence);
}
- vlc_mutex_unlock(&(*hls)->lock);
}
/* update meta information */
- vlc_mutex_lock(&(*hls)->lock);
- (*hls)->sequence = hls_new->sequence;
- (*hls)->duration = (hls_new->duration == -1) ? (*hls)->duration : hls_new->duration;
- (*hls)->b_cache = hls_new->b_cache;
- vlc_mutex_unlock(&(*hls)->lock);
+ hls_old->sequence = hls_new->sequence;
+ hls_old->duration = (hls_new->duration == -1) ? hls_old->duration : hls_new->duration;
+ hls_old->b_cache = hls_new->b_cache;
+ vlc_mutex_unlock(&hls_old->lock);
return VLC_SUCCESS;
-fail_and_unlock:
- assert(0);
- vlc_mutex_unlock(&(*hls)->lock);
- return VLC_EGENERIC;
}
static int hls_ReloadPlaylist(stream_t *s)
msg_Info(s, "new HLS stream appended (id=%d, bandwidth=%"PRIu64")",
hls_new->id, hls_new->bandwidth);
}
- else if (hls_UpdatePlaylist(s, hls_new, &hls_old) != VLC_SUCCESS)
+ else if (hls_UpdatePlaylist(s, hls_new, hls_old) != VLC_SUCCESS)
msg_Info(s, "failed updating HLS stream (id=%d, bandwidth=%"PRIu64")",
hls_new->id, hls_new->bandwidth);
}
int estimated = (int)(size / p_sys->bandwidth);
if (estimated > segment->duration)
{
- msg_Warn(s,"downloading of segment %d takes %ds, which is longer than its playback (%ds)",
+ msg_Warn(s,"downloading segment %d predicted to take %ds, which exceeds its length (%ds)",
segment->sequence, estimated, segment->duration);
}
}
mtime_t start = mdate();
if (hls_Download(s, segment) != VLC_SUCCESS)
{
- msg_Err(s, "downloaded segment %d from stream %d failed",
+ msg_Err(s, "downloading segment %d from stream %d failed",
segment->sequence, *cur_stream);
vlc_mutex_unlock(&segment->lock);
return VLC_EGENERIC;
}
mtime_t duration = mdate() - start;
- if (hls->bandwidth == 0)
+ if (hls->bandwidth == 0 && segment->duration > 0)
{
/* Try to estimate the bandwidth for this stream */
- hls->bandwidth = (uint64_t)((double)segment->size / ((double)duration / 1000000.0));
+ hls->bandwidth = (uint64_t)(((double)segment->size * 8) / ((double)segment->duration));
}
/* If the segment is encrypted, decode it */
msg_Info(s, "downloaded segment %d from stream %d",
segment->sequence, *cur_stream);
- /* check for division by zero */
- double ms = (double)duration / 1000.0; /* ms */
- if (ms <= 0.0)
- return VLC_SUCCESS;
-
- uint64_t bw = ((double)(segment->size * 8) / ms) * 1000; /* bits / s */
+ uint64_t bw = segment->size * 8 * 1000000 / __MAX(1, duration); /* bits / s */
p_sys->bandwidth = bw;
if (p_sys->b_meta && (hls->bandwidth != bw))
{
if (hls == NULL)
return VLC_EGENERIC;
- /* Download first 2 segments of this HLS stream */
- for (int i = 0; i < 2; i++)
+ if (vlc_array_count(hls->segments) == 0)
+ return VLC_EGENERIC;
+ else if (vlc_array_count(hls->segments) == 1 && p_sys->b_live)
+ msg_Warn(s, "Only 1 segment available to prefetch in live stream; may stall");
+
+ /* Download first 2 segments of this HLS stream if they exist */
+ for (int i = 0; i < __MIN(vlc_array_count(hls->segments), 2); i++)
{
segment_t *segment = segment_GetSegment(hls, p_sys->download.segment);
if (segment == NULL )
uint64_t size;
do
{
+ /* NOTE: Beware the size reported for a segment by the HLS server may not
+ * be correct, when downloading the segment data. Therefore check the size
+ * and enlarge the segment data block if necessary.
+ */
size = stream_Size(p_ts);
if (size > segment->size)
{
while (p < end)
{
- if ((*p == '\n') || (*p == '\0'))
+ if ((*p == '\r') || (*p == '\n') || (*p == '\0'))
break;
p++;
}
- /* copy line excluding \n or \0 */
+ /* copy line excluding \r \n or \0 */
line = strndup((char *)begin, p - begin);
- if (*p == '\0')
- *pos = end;
- else
+ while ((*p == '\r') || (*p == '\n') || (*p == '\0'))
{
- /* next pass start after \n */
- p++;
- *pos = p;
+ if (*p == '\0')
+ {
+ *pos = end;
+ break;
+ }
+ else
+ {
+ /* next pass start after \r and \n */
+ p++;
+ *pos = p;
+ }
}
return line;
}
p_sys->m3u8 = psz_uri;
+ char *new_path;
+ if (asprintf(&new_path, "%s.ts", s->psz_path) < 0)
+ {
+ free(p_sys->m3u8);
+ free(p_sys);
+ return VLC_ENOMEM;
+ }
+ free(s->psz_path);
+ s->psz_path = new_path;
+
p_sys->bandwidth = 0;
p_sys->b_live = true;
p_sys->b_meta = false;
/* manage encryption key if needed */
hls_ManageSegmentKeys(s, hls_Get(p_sys->hls_stream, current));
- if (p_sys->b_live && (p_sys->playback.segment < 0))
- {
- msg_Warn(s, "less data than 3 times 'target duration' available for live playback, playback may stall");
- }
-
if (Prefetch(s, ¤t) != VLC_SUCCESS)
{
msg_Err(s, "fetching first segment failed.");
/* */
vlc_mutex_lock(&p_sys->download.lock_wait);
+ /* negate the condition variable's predicate */
+ p_sys->download.segment = p_sys->playback.segment = 0;
+ p_sys->download.seek = 0; /* better safe than sorry */
vlc_cond_signal(&p_sys->download.wait);
vlc_mutex_unlock(&p_sys->download.lock_wait);
else
segment_RestorePos(segment);
- p_sys->playback.segment++;
vlc_mutex_unlock(&segment->lock);
/* signal download thread */
vlc_mutex_lock(&p_sys->download.lock_wait);
+ p_sys->playback.segment++;
vlc_cond_signal(&p_sys->download.wait);
vlc_mutex_unlock(&p_sys->download.lock_wait);
continue;
uint64_t size = hls->size;
int count = vlc_array_count(hls->segments);
- /* restore current segment to start position */
- segment_t *segment = segment_GetSegment(hls, p_sys->playback.segment);
- if (segment == NULL)
+ segment_t *currentSegment = segment_GetSegment(hls, p_sys->playback.segment);
+ if (currentSegment == NULL)
{
vlc_mutex_unlock(&hls->lock);
return VLC_EGENERIC;
}
- vlc_mutex_lock(&segment->lock);
- segment_RestorePos(segment);
- vlc_mutex_unlock(&segment->lock);
for (int n = 0; n < count; n++)
{
/* */
if (b_found)
{
- /* restore segment to start position */
+
+ /* restore current segment to start position */
+ vlc_mutex_lock(¤tSegment->lock);
+ segment_RestorePos(currentSegment);
+ vlc_mutex_unlock(¤tSegment->lock);
+
+ /* restore seeked segment to start position */
segment_t *segment = segment_GetSegment(hls, p_sys->playback.segment);
if (segment == NULL)
{
vlc_mutex_lock(&p_sys->download.lock_wait);
p_sys->download.seek = p_sys->playback.segment;
vlc_cond_signal(&p_sys->download.wait);
- vlc_mutex_unlock(&p_sys->download.lock_wait);
/* Wait for download to be finished */
- vlc_mutex_lock(&p_sys->download.lock_wait);
msg_Info(s, "seek to segment %d", p_sys->playback.segment);
- while (((p_sys->download.seek != -1) ||
- (p_sys->download.segment - p_sys->playback.segment < 3)) &&
- (p_sys->download.segment < (count - 6)))
+ while ((p_sys->download.seek != -1) ||
+ ((p_sys->download.segment - p_sys->playback.segment < 3) &&
+ (p_sys->download.segment < count)))
{
vlc_cond_wait(&p_sys->download.wait, &p_sys->download.lock_wait);
if (!vlc_object_alive(s) || s->b_error) break;
projects / vlc / blobdiff