struct lms_stream base;
struct {
unsigned int sampling_rate;
+ unsigned int bitrate;
+ double framerate;
} priv;
};
* See http://www.microsoft.com/windows/windowsmedia/forpros/format/asfspec.aspx
*/
static const char header_guid[16] = "\x30\x26\xB2\x75\x8E\x66\xCF\x11\xA6\xD9\x00\xAA\x00\x62\xCE\x6C";
-static const char header_extension_guid[16] = "\xB5\x03\xBF\x5F\x2E\xA9\xCF\x11\x00\xC0\x0C\x20\x53\x65";
+static const char header_extension_guid[16] = "\xB5\x03\xBF\x5F\x2E\xA9\xCF\x11\x8E\xE3\x00\xC0\x0C\x20\x53\x65";
+static const char extended_stream_properties_guid[16] = "\xCB\xA5\xE6\x14\x72\xC6\x32\x43\x83\x99\xA9\x69\x52\x06\x5B\x5A";
+static const char language_list_guid[16] = "\xA9\x46\x43\x7C\xE0\xEF\xFC\x4B\xB2\x29\x39\x3E\xDE\x41\x5C\x85";
static const char file_properties_guid[16] = "\xA1\xDC\xAB\x8C\x47\xA9\xCF\x11\x8E\xE4\x00\xC0\x0C\x20\x53\x65";
static const char stream_properties_guid[16] = "\x91\x07\xDC\xB7\xB7\xA9\xCF\x11\x8E\xE6\x00\xC0\x0C\x20\x53\x65";
static const char stream_type_audio_guid[16] = "\x40\x9E\x69\xF8\x4D\x5B\xCF\x11\xA8\xFD\x00\x80\x5F\x5C\x44\x2B";
return _video_codecs[i].name;
}
+static struct stream * _stream_get_or_create(struct asf_info *info,
+ unsigned int stream_id)
+{
+ struct stream *s;
+
+ for (s = info->streams; s; s = (struct stream *) s->base.next) {
+ if (s->base.stream_id == stream_id)
+ return s;
+ }
+
+ s = calloc(1, sizeof(*s));
+ if (!s)
+ return NULL;
+
+ /* The Stream Properties Object can be anywhere inside the Header Object:
+ * before the Header Extension Object, after it or embedded into the
+ * Extended Stream Properties, inside the Header Extension Object.
+ *
+ * When parsing we either create a new stream and prepend it to the list or
+ * we return the one already created by a previous object (see the loop
+ * above).
+ *
+ * Note that the stream type is only available in the Stream Properties
+ * Object. A file with an Extended Stream Properties Object referring to a
+ * stream that doesn't have a corresponding Stream Properties is invalid. We
+ * let it into the list, but it won't have the stream_type set. In this case
+ * LMS will end up ignoring the stream when we try to add the file in the
+ * database -- this is why we set type to -1 here */
+ s->base.stream_id = stream_id;
+ s->base.type = -1;
+ s->base.next = (struct lms_stream *) info->streams;
+ info->streams = s;
+
+ return s;
+}
+
+static void _stream_copy_extension_properties(struct stream *s)
+{
+ switch (s->base.type) {
+ case LMS_STREAM_TYPE_AUDIO:
+ s->base.audio.bitrate = s->priv.bitrate;
+ break;
+ case LMS_STREAM_TYPE_VIDEO:
+ s->base.video.bitrate = s->priv.bitrate;
+ s->base.video.framerate = s->priv.framerate;
+ break;
+ default:
+ break;
+ }
+}
+
static int
-_parse_stream_properties(int fd, struct stream **pstream)
+_parse_stream_properties(int fd, struct asf_info *info)
{
struct {
char stream_type[16];
uint16_t flags;
uint32_t reserved; /* don't use, unaligned */
} __attribute__((packed)) props;
-
- int r;
+ unsigned int stream_id;
struct stream *s;
-
- *pstream = NULL;
-
- s = calloc(1, sizeof(struct stream));
- if (!s)
- return -ENOMEM;
+ int r, type;
r = read(fd, &props, sizeof(props));
if (r != sizeof(props))
- goto fail;
+ return r;
+
+ stream_id = le16toh(props.flags) & 0x7F;
+
+ /* Not a valid stream */
+ if (!stream_id)
+ return r;
if (memcmp(props.stream_type, stream_type_audio_guid, 16) == 0)
- s->base.type = LMS_STREAM_TYPE_AUDIO;
+ type = LMS_STREAM_TYPE_AUDIO;
else if (memcmp(props.stream_type, stream_type_video_guid, 16) == 0)
- s->base.type = LMS_STREAM_TYPE_VIDEO;
- else {
+ type = LMS_STREAM_TYPE_VIDEO;
+ else
/* ignore stream */
- goto fail;
- }
+ return r;
- s->base.stream_id = le16toh(props.flags) & 0x7F;
- /* Not a valid stream */
- if (!s->base.stream_id)
- goto fail;
+ s = _stream_get_or_create(info, stream_id);
+ if (!s)
+ return -ENOMEM;
+
+ s->base.type = type;
if (s->base.type == LMS_STREAM_TYPE_AUDIO) {
if (le32toh(props.type_specific_len) < 18)
s->base.audio.channels = _read_word(fd);
s->priv.sampling_rate = _read_dword(fd);
s->base.audio.bitrate = _read_dword(fd) * 8;
- r += 12;
} else {
struct {
uint32_t width_unused;
/* other fields are ignored */
} __attribute__((packed)) video;
- int r2 = read(fd, &video, sizeof(video));
unsigned int num, den;
- if (r2 < 0)
+ r = read(fd, &video, sizeof(video));
+ if (r != sizeof(video))
goto done;
- r += r2;
- if ((unsigned int) r2 < get_le32(&video.size) -
+ if ((unsigned int) r < get_le32(&video.size) -
(sizeof(video) - offsetof(typeof(video), width)))
goto done;
strlen(s->base.video.aspect_ratio.str) : 0;
}
+ _stream_copy_extension_properties(s);
+
done:
- *pstream = s;
- return r;
+ /* If there's any video stream, consider the file as video */
+ if (info->type != LMS_STREAM_TYPE_VIDEO)
+ info->type = s->base.type;
-fail:
- free(s);
return r;
}
-static void
-_parse_content_description(lms_charset_conv_t *cs_conv, int fd, struct asf_info *info)
+static int _parse_extended_stream_properties(lms_charset_conv_t *cs_conv,
+ int fd, struct asf_info *info)
+{
+ struct {
+ uint64_t start_time;
+ uint64_t end_time;
+ uint32_t bitrate;
+ uint32_t unused[7];
+ uint16_t stream_id;
+ uint16_t lang_id;
+ uint64_t avg_time_per_frame;
+ uint16_t stream_name_count;
+ uint16_t payload_extension_system_count;
+ } __attribute__((packed)) props;
+ struct stream *s;
+ unsigned int stream_id;
+ uint16_t n;
+ int r;
+
+ r = read(fd, &props, sizeof(props));
+ if (r != sizeof(props))
+ return r;
+
+ stream_id = get_le16(&props.stream_id);
+ s = _stream_get_or_create(info, stream_id);
+
+ s->priv.bitrate = get_le32(&props.bitrate);
+ s->priv.framerate = (NSEC100_PER_SEC /
+ (double) get_le64(&props.avg_time_per_frame));
+ for (n = get_le16(&props.stream_name_count); n; n--) {
+ uint16_t j;
+ lseek(fd, 2, SEEK_CUR);
+ j = _read_word(fd);
+ lseek(fd, j, SEEK_CUR);
+ }
+ for (n = get_le16(&props.payload_extension_system_count); n; n--) {
+ uint32_t j;
+ lseek(fd, 18, SEEK_CUR);
+ j = _read_dword(fd);
+ lseek(fd, j, SEEK_CUR);
+ }
+
+ return 0;
+}
+
+/* Lazy implementation, let the parsing of subframes to the caller. Techically
+ * this is wrong, since it might parse objects in the extension header that
+ * should be in the header object, however this should parse ok all good files
+ * and eventually the bad ones. */
+static int _parse_header_extension(lms_charset_conv_t *cs_conv, int fd,
+ struct asf_info *info)
+{
+ lseek(fd, 22, SEEK_CUR);
+ return 0;
+}
+
+static int
+_parse_content_description(lms_charset_conv_t *cs_conv, int fd,
+ struct asf_info *info)
{
int title_length = _read_word(fd);
int artist_length = _read_word(fd);
- int copyright_length = _read_word(fd);
- int comment_length = _read_word(fd);
- int rating_length = _read_word(fd);
+
+ lseek(fd, 6, SEEK_CUR);
_read_string(fd, title_length, &info->title.str, &info->title.len);
lms_charset_conv_force(cs_conv, &info->title.str, &info->title.len);
_read_string(fd, artist_length, &info->artist.str, &info->artist.len);
lms_charset_conv_force(cs_conv, &info->artist.str, &info->artist.len);
+
/* ignore copyright, comment and rating */
- lseek(fd, copyright_length + comment_length + rating_length, SEEK_CUR);
+ return 1;
}
static void
}
}
-static void
-_parse_extended_content_description_object(lms_charset_conv_t *cs_conv, int fd, struct asf_info *info)
+static int
+_parse_extended_content_description_object(lms_charset_conv_t *cs_conv, int fd,
+ struct asf_info *info)
{
int count = _read_word(fd);
char *attr_name;
unsigned int attr_name_len;
int attr_type, attr_size;
+
while (count--) {
attr_name = NULL;
_parse_attribute_name(fd,
_skip_attribute_data(fd, 0, attr_type, attr_size);
free(attr_name);
}
+
+ return 1;
}
static void *
}
}
-/* TODO:
- * Parse the "Extended Stream Properties Object" (sec. 4.1). It contains some
- * missing fields: bitrate and language
- *
- * It may also contain the "Stream Properties Object" embedded in it.
- * For language we also need to parse "Language List Object" (sec 4.6) which
- * contains an array with all the languages used (they are in UTF-16, so they
- * need to be properly converted).
- *
- * Oh, well... there's also the optional "Stream Bitrate Properties Object"
- * which also may contain the bitrate. This property must be very important so
- * they duplicated it everywhere.
- *
- * Apparently the length can also be obtained from the "Extended Stream
- * Properties Object": start_time, end_time (paying attention to the preroll
- * field in the header).
- *
- * Knowing the length, frame rate can be calculated with the "AverageTime Per
- * Frame" field of the "Extended Stream Properties Object"
- */
+/* TODO: Parse "Language List Object" (sec 4.6) which contains an array with all
+ * the languages used (they are in UTF-16, so they need to be properly
+ * converted). */
static int
_parse(struct plugin *plugin, struct lms_context *ctxt, const struct lms_file_info *finfo, void *match)
{
struct asf_info info = { .type = LMS_STREAM_TYPE_UNKNOWN };
- int r, fd, num_objects, i;
+ int r, fd;
char guid[16];
unsigned int size;
+ unsigned long long hdrsize;
+ off_t pos_end, pos = 0;
fd = open(finfo->path, O_RDONLY);
if (fd < 0) {
r = -2;
goto done;
}
+
if (memcmp(guid, header_guid, 16) != 0) {
fprintf(stderr, "ERROR: invalid header (%s).\n", finfo->path);
r = -3;
goto done;
}
- size = _read_qword(fd);
- num_objects = _read_dword(fd);
+ hdrsize = _read_qword(fd);
+ pos_end = lseek(fd, 6, SEEK_CUR) - 24 + hdrsize;
- lseek(fd, 2, SEEK_CUR);
+ while (1) {
+ if (!pos)
+ pos = lseek(fd, 0, SEEK_CUR);
+ if (pos > pos_end - 24)
+ break;
- for (i = 0; i < num_objects; ++i) {
read(fd, &guid, 16);
size = _read_qword(fd);
- if (memcmp(guid, file_properties_guid, 16) == 0) {
+ if (memcmp(guid, header_extension_guid, 16) == 0)
+ r = _parse_header_extension(plugin->cs_conv, fd, &info);
+ else if (memcmp(guid, extended_stream_properties_guid, 16) == 0)
+ r = _parse_extended_stream_properties(plugin->cs_conv, fd, &info);
+ else if (memcmp(guid, file_properties_guid, 16) == 0)
r = _parse_file_properties(fd, &info);
- if (r < 0)
- goto done;
- lseek(fd, size - (24 + r), SEEK_CUR);
- } else if (memcmp(guid, stream_properties_guid, 16) == 0) {
- struct stream *s = NULL;
- r = _parse_stream_properties(fd, &s);
- if (r < 0)
- goto done;
-
- lseek(fd, size - (24 + r), SEEK_CUR);
-
- if (s) {
- if (info.type != LMS_STREAM_TYPE_VIDEO)
- info.type = s->base.type;
-
- s->base.next = (struct lms_stream *) info.streams;
- info.streams = s;
- }
- } else if (memcmp(guid, content_description_guid, 16) == 0)
- _parse_content_description(plugin->cs_conv, fd, &info);
+ else if (memcmp(guid, stream_properties_guid, 16) == 0)
+ r = _parse_stream_properties(fd, &info);
+ else if (memcmp(guid, language_list_guid, 16) == 0)
+ r = 1;
+ else if (memcmp(guid, content_description_guid, 16) == 0)
+ r = _parse_content_description(plugin->cs_conv, fd, &info);
else if (memcmp(guid, extended_content_description_guid, 16) == 0)
- _parse_extended_content_description_object(plugin->cs_conv, fd,
- &info);
+ r = _parse_extended_content_description_object(plugin->cs_conv, fd,
+ &info);
else if (memcmp(guid, content_encryption_object_guid, 16) == 0 ||
- memcmp(guid, extended_content_encryption_object_guid, 16) == 0) {
+ memcmp(guid, extended_content_encryption_object_guid, 16) == 0)
/* ignore DRM'd files */
- fprintf(stderr, "ERROR: ignoring DRM'd file %s\n", finfo->path);
r = -4;
+ else
+ r = 1;
+
+ if (r < 0)
goto done;
- } else
- lseek(fd, size - 24, SEEK_CUR);
+
+ if (r > 0)
+ pos = lseek(fd, pos + size, SEEK_SET);
+ else
+ pos = 0;
}
/* try to define stream type by extension */
projects / platform / upstream / lightmediascanner.git / commitdiff