#endif
}
+/* TODO: we could probably make a generic function for this.. */
+static gint
+aac_type_find_scan_loas_frames_ep (GstTypeFind * tf, DataScanCtx * scan_ctx,
+ gint max_frames)
+{
+ DataScanCtx c = *scan_ctx;
+ guint16 snc;
+ guint len;
+ gint count = 0;
+
+ do {
+ if (!data_scan_ctx_ensure_data (tf, &c, 5))
+ break;
+
+ /* EPAudioSyncStream */
+ len = ((c.data[2] & 0x0f) << 9) | (c.data[3] << 1) |
+ ((c.data[4] & 0x80) >> 7);
+
+ if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
+ GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
+ break;
+ }
+
+ /* check length of frame */
+ snc = GST_READ_UINT16_BE (c.data + len);
+ if (snc != 0x4de1) {
+ GST_DEBUG ("No sync found at 0x%" G_GINT64_MODIFIER "x", c.offset + len);
+ break;
+ }
+
+ ++count;
+
+ GST_DEBUG ("Found LOAS syncword #%d at offset 0x%" G_GINT64_MODIFIER "x, "
+ "framelen %u", count, c.offset, len);
+
+ data_scan_ctx_advance (tf, &c, len);
+ } while (count < max_frames && (c.offset - scan_ctx->offset) < 64 * 1024);
+
+ GST_DEBUG ("found %d consecutive frames", count);
+ return count;
+}
+
+static gint
+aac_type_find_scan_loas_frames (GstTypeFind * tf, DataScanCtx * scan_ctx,
+ gint max_frames)
+{
+ DataScanCtx c = *scan_ctx;
+ guint16 snc;
+ guint len;
+ gint count = 0;
+
+ do {
+ if (!data_scan_ctx_ensure_data (tf, &c, 3))
+ break;
+
+ /* AudioSyncStream */
+ len = ((c.data[1] & 0x1f) << 8) | c.data[2];
+ /* add size of sync stream header */
+ len += 3;
+
+ if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len)) {
+ GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
+ break;
+ }
+
+ /* check length of frame */
+ snc = GST_READ_UINT16_BE (c.data + len);
+ if ((snc & 0xffe0) != 0x56e0) {
+ GST_DEBUG ("No sync found at 0x%" G_GINT64_MODIFIER "x", c.offset + len);
+ break;
+ }
+
+ ++count;
+
+ GST_DEBUG ("Found LOAS syncword #%d at offset 0x%" G_GINT64_MODIFIER "x, "
+ "framelen %u", count, c.offset, len);
+
+ data_scan_ctx_advance (tf, &c, len);
+ } while (count < max_frames && (c.offset - scan_ctx->offset) < 64 * 1024);
+
+ GST_DEBUG ("found %d consecutive frames", count);
+ return count;
+}
+
/*** audio/mpeg version 2, 4 ***/
static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/mpeg, "
static void
aac_type_find (GstTypeFind * tf, gpointer unused)
{
- /* LUT to convert the AudioObjectType from the ADTS header to a string */
DataScanCtx c = { 0, NULL, 0 };
+ GstTypeFindProbability best_probability = GST_TYPE_FIND_NONE;
+ GstCaps *best_caps = NULL;
+ guint best_count = 0;
while (c.offset < AAC_AMOUNT) {
guint snc, len;
}
GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
- } else if (G_UNLIKELY (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1))) {
- /* LOAS frame */
-
- GST_DEBUG ("Found one LOAS syncword at offset 0x%" G_GINT64_MODIFIER
- "x, tracing next...", c.offset);
+ } else if (G_UNLIKELY ((snc & 0xffe0) == 0x56e0 || snc == 0x4de1)) {
+ gint count;
- /* check length of frame for each type of detectable LOAS streams */
- if (snc == 0x4de1) {
- /* EPAudioSyncStream */
- len = ((c.data[2] & 0x0f) << 9) | (c.data[3] << 1) |
- ((c.data[4] & 0x80) >> 7);
- /* add size of EP sync stream header */
- len += 7;
- } else {
- /* AudioSyncStream */
- len = ((c.data[1] & 0x1f) << 8) | c.data[2];
- /* add size of sync stream header */
- len += 3;
- }
-
- if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
- GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
- goto next;
- }
+ /* LOAS frame */
+ GST_INFO ("Possible LOAS syncword at offset 0x%" G_GINT64_MODIFIER
+ "x, scanning for more frames...", c.offset);
- /* check if there's a second LOAS frame */
- snc = GST_READ_UINT16_BE (c.data + len);
- if (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1)) {
- GST_DEBUG ("Found second LOAS syncword at offset 0x%"
- G_GINT64_MODIFIER "x, framelen %u", c.offset, len);
+ if (snc == 0x4de1)
+ count = aac_type_find_scan_loas_frames_ep (tf, &c, 20);
+ else
+ count = aac_type_find_scan_loas_frames (tf, &c, 20);
- gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
+ if (count >= 3 && count > best_count) {
+ gst_caps_replace (&best_caps, NULL);
+ best_caps = gst_caps_new_simple ("audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, 4,
"stream-format", G_TYPE_STRING, "loas", NULL);
- break;
+ best_count = count;
+ best_probability = GST_TYPE_FIND_POSSIBLE - 10 + count * 3;
+ if (best_probability >= GST_TYPE_FIND_LIKELY)
+ break;
}
-
- GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
} else if (!memcmp (c.data, "ADIF", 4)) {
/* ADIF header */
gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
data_scan_ctx_advance (tf, &c, 1);
}
+
+ if (best_probability > GST_TYPE_FIND_NONE) {
+ gst_type_find_suggest (tf, best_probability, best_caps);
+ gst_caps_unref (best_caps);
+ }
}
/*** audio/mpeg version 1 ***/
g_return_if_fail (layer >= 1 && layer <= 3);
gst_type_find_suggest_simple (tf, prob, "audio/mpeg",
- "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
+ "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer,
+ "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
}
}
static void
wavpack_type_find (GstTypeFind * tf, gpointer unused)
{
+ GstTypeFindProbability base_prob = GST_TYPE_FIND_POSSIBLE;
guint64 offset;
guint32 blocksize;
const guint8 *data;
+ guint count_wv, count_wvc;
data = gst_type_find_peek (tf, 0, 32);
if (!data)
* work in pull-mode */
blocksize = GST_READ_UINT32_LE (data + 4);
GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
+ count_wv = 0;
+ count_wvc = 0;
offset = 32;
- while (offset < 32 + blocksize) {
+ while (offset < 8 + blocksize) {
guint32 sublen;
/* get chunk header */
} else {
sublen += 1 + 1; /* id + length */
}
- if (sublen > blocksize - offset + 32) {
+ if (offset + sublen > 8 + blocksize) {
GST_LOG ("chunk length too big (%u > %" G_GUINT64_FORMAT ")", sublen,
blocksize - offset);
break;
switch (data[0] & 0x0f) {
case 0xa: /* ID_WV_BITSTREAM */
case 0xc: /* ID_WVX_BITSTREAM */
- gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, WAVPACK_CAPS);
- return;
+ ++count_wv;
+ break;
case 0xb: /* ID_WVC_BITSTREAM */
- gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY,
- WAVPACK_CORRECTION_CAPS);
- return;
+ ++count_wvc;
+ break;
default:
break;
}
+ if (count_wv >= 5 || count_wvc >= 5)
+ break;
}
offset += sublen;
}
+
+ /* check for second block header */
+ data = gst_type_find_peek (tf, 8 + blocksize, 4);
+ if (data != NULL && memcmp (data, "wvpk", 4) == 0) {
+ GST_DEBUG ("found second block sync");
+ base_prob = GST_TYPE_FIND_LIKELY;
+ }
+
+ GST_DEBUG ("wvc=%d, wv=%d", count_wvc, count_wv);
+
+ if (count_wvc > 0 && count_wvc > count_wv) {
+ gst_type_find_suggest (tf,
+ MIN (base_prob + 5 * count_wvc, GST_TYPE_FIND_NEARLY_CERTAIN),
+ WAVPACK_CORRECTION_CAPS);
+ } else if (count_wv > 0) {
+ gst_type_find_suggest (tf,
+ MIN (base_prob + 5 * count_wv, GST_TYPE_FIND_NEARLY_CERTAIN),
+ WAVPACK_CAPS);
+ }
}
/*** application/postscrip ***/
gboolean seen_idr = FALSE;
gboolean seen_sps = FALSE;
gboolean seen_pps = FALSE;
+ gboolean seen_ssps = FALSE;
int nut, ref;
int good = 0;
int bad = 0;
good++;
}
} else if (nut >= 14 && nut <= 33) {
- /* reserved */
- /* Theoretically these are good, since if they exist in the
- stream it merely means that a newer backwards-compatible
- h.264 stream. But we should be identifying that separately. */
- bad++;
+ if (nut == 15) {
+ seen_ssps = TRUE;
+ good++;
+ } else if (seen_ssps && (nut == 14 || nut == 20)) {
+ good++;
+ } else {
+ /* reserved */
+ /* Theoretically these are good, since if they exist in the
+ stream it merely means that a newer backwards-compatible
+ h.264 stream. But we should be identifying that separately. */
+ bad++;
+ }
} else {
/* unspecified, application specific */
/* don't consider these bad */
}
- GST_LOG ("good:%d, bad:%d, pps:%d, sps:%d, idr:%d", good, bad, seen_pps,
- seen_sps, seen_idr);
+ GST_LOG ("good:%d, bad:%d, pps:%d, sps:%d, idr:%d ssps:%d", good, bad,
+ seen_pps, seen_sps, seen_idr, seen_ssps);
if (seen_sps && seen_pps && seen_idr && good >= 10 && bad < 4) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H264_VIDEO_CAPS);
data_scan_ctx_advance (tf, &c, 1);
}
- GST_LOG ("good:%d, bad:%d, pps:%d, sps:%d, idr:%d", good, bad, seen_pps,
- seen_sps, seen_idr);
+ GST_LOG ("good:%d, bad:%d, pps:%d, sps:%d, idr:%d ssps=%d", good, bad,
+ seen_pps, seen_sps, seen_idr, seen_ssps);
if (good >= 2 && bad == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H264_VIDEO_CAPS);
gst_type_find_suggest_simple (tf, probability, "video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
- "mpegversion", G_TYPE_INT, 1, NULL);
+ "mpegversion", G_TYPE_INT, 1, "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
}
}
}
}
+/*** audio/x-sbc ***/
+static GstStaticCaps sbc_caps = GST_STATIC_CAPS ("audio/x-sbc");
+#define SBC_CAPS (gst_static_caps_get(&sbc_caps))
+
+static gsize
+sbc_check_header (const guint8 * data, gsize len, guint * rate,
+ guint * channels)
+{
+ static const guint16 sbc_rates[4] = { 16000, 32000, 44100, 48000 };
+ static const guint8 sbc_blocks[4] = { 4, 8, 12, 16 };
+ guint n_blocks, ch_mode, n_subbands, bitpool;
+
+ if (data[0] != 0x9C || len < 4)
+ return 0;
+
+ n_blocks = sbc_blocks[(data[1] >> 4) & 0x03];
+ ch_mode = (data[1] >> 2) & 0x03;
+ n_subbands = (data[1] & 0x01) ? 8 : 4;
+ bitpool = data[2];
+ if (bitpool < 2)
+ return 0;
+
+ *rate = sbc_rates[(data[1] >> 6) & 0x03];
+ *channels = (ch_mode == 0) ? 1 : 2;
+
+ if (ch_mode == 0)
+ return 4 + (n_subbands * 1) / 2 + (n_blocks * 1 * bitpool) / 8;
+ else if (ch_mode == 1)
+ return 4 + (n_subbands * 2) / 2 + (n_blocks * 2 * bitpool) / 8;
+ else if (ch_mode == 2)
+ return 4 + (n_subbands * 2) / 2 + (n_blocks * bitpool) / 8;
+ else if (ch_mode == 3)
+ return 4 + (n_subbands * 2) / 2 + (n_subbands + n_blocks * bitpool) / 8;
+
+ return 0;
+}
+
+static void
+sbc_type_find (GstTypeFind * tf, gpointer unused)
+{
+ const guint8 *data;
+ gsize frame_len;
+ guint i, rate, channels, offset = 0;
+
+ for (i = 0; i < 10; ++i) {
+ data = gst_type_find_peek (tf, offset, 8);
+ if (data == NULL)
+ return;
+
+ frame_len = sbc_check_header (data, 8, &rate, &channels);
+ if (frame_len == 0)
+ return;
+
+ offset += frame_len;
+ }
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE, "audio/x-sbc",
+ "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels,
+ "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
+}
+
/*** audio/iLBC-sh ***/
/* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
"application/octet-stream", NULL);
}
+/* SSA/ASS subtitles
+ *
+ * http://en.wikipedia.org/wiki/SubStation_Alpha
+ * http://matroska.org/technical/specs/subtitles/ssa.html
+ */
+static void
+ssa_type_find (GstTypeFind * tf, gpointer private)
+{
+ const gchar *start, *end, *ver_str, *media_type = NULL;
+ const guint8 *data;
+ gchar *str, *script_type, *p = NULL;
+ gint64 len;
+
+ data = gst_type_find_peek (tf, 0, 32);
+
+ if (data == NULL)
+ return;
+
+ /* there might be a BOM at the beginning */
+ if (memcmp (data, "[Script Info]", 13) != 0 &&
+ memcmp (data + 2, "[Script Info]", 13) != 0 &&
+ memcmp (data + 3, "[Script Info]", 13) != 0 &&
+ memcmp (data + 4, "[Script Info]", 13) != 0) {
+ return;
+ }
+
+ /* now check if we have SSA or ASS */
+ len = gst_type_find_get_length (tf);
+ if (len > 8192)
+ len = 8192;
+
+ data = gst_type_find_peek (tf, 0, len);
+ if (data == NULL)
+ return;
+
+ /* skip BOM */
+ start = (gchar *) memchr (data, '[', 5);
+ g_assert (start);
+ len -= (start - (gchar *) data);
+
+ /* ignore anything non-UTF8 for now, in future we might at least allow
+ * other UTF variants that are clearly prefixed with the appropriate BOM */
+ if (!g_utf8_validate (start, len, &end) && (len - (end - start)) > 6) {
+ GST_FIXME ("non-UTF8 SSA/ASS file");
+ return;
+ }
+
+ /* something at start, but not a UTF-8 BOM? */
+ if (data[0] != '[' && (data[0] != 0xEF || data[1] != 0xBB || data[2] != 0xBF))
+ return;
+
+ /* ignore any partial UTF-8 characters at the end */
+ len = end - start;
+
+ /* create a NUL-terminated string so it's easier to process it safely */
+ str = g_strndup (start, len - 1);
+ script_type = strstr (str, "ScriptType:");
+ if (script_type != NULL) {
+ gdouble version;
+
+ ver_str = script_type + 11;
+ while (*ver_str == ' ' || *ver_str == 'v' || *ver_str == 'V')
+ ++ver_str;
+ version = g_ascii_strtod (ver_str, &p);
+ if (version == 4.0 && p != NULL && *p == '+')
+ media_type = "application/x-ass";
+ else if (version >= 1.0 && version <= 4.0)
+ media_type = "application/x-ssa";
+ }
+
+ if (media_type == NULL) {
+ if (strstr (str, "[v4+ Styles]") || strstr (str, "[V4+ Styles]"))
+ media_type = "application/x-ass";
+ else if (strstr (str, "[v4 Styles]") || strstr (str, "[V4 Styles]"))
+ media_type = "application/x-ssa";
+ }
+
+ if (media_type != NULL) {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
+ media_type, "parsed", G_TYPE_BOOLEAN, FALSE, NULL);
+ } else {
+ GST_WARNING ("could not detect SSA/ASS variant");
+ }
+
+ g_free (str);
+}
+
/*** generic typefind for streams that have some data at a specific position***/
typedef struct
{
"amr", "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY, ilbc_type_find,
"ilbc", ILBC_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-sbc", GST_RANK_MARGINAL, sbc_type_find,
+ "sbc", SBC_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
"sid", "PSID", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
TYPE_FIND_REGISTER (plugin, "application/octet-stream", GST_RANK_MARGINAL,
dvdiso_type_find, NULL, NULL, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ssa", GST_RANK_SECONDARY,
+ ssa_type_find, "ssa,ass", NULL, NULL, NULL);
+
return TRUE;
}
projects / platform / upstream / gstreamer.git / blobdiff