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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 18:21:04 +00:00
vorbisdepay: fix some leaks
And leak the codebooks. Use glib base64 decoders. Use subbuffers to avoid a memcpy of the headers.
This commit is contained in:
Wim Taymans
parent
8f8e035cd5
commit
06efeff5d9
1 changed files with 52 additions and 57 deletions
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@ -119,6 +119,33 @@ gst_rtp_vorbis_depay_init (GstRtpVorbisDepay * rtpvorbisdepay,
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{
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rtpvorbisdepay->adapter = gst_adapter_new ();
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}
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static void
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free_config (GstRtpVorbisConfig * conf)
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{
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GList *headers;
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for (headers = conf->headers; headers; headers = g_list_next (headers)) {
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GstBuffer *header = GST_BUFFER_CAST (headers->data);
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gst_buffer_unref (header);
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}
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g_list_free (conf->headers);
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g_free (conf);
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}
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static void
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free_indents (GstRtpVorbisDepay * rtpvorbisdepay)
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{
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GList *walk;
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for (walk = rtpvorbisdepay->configs; walk; walk = g_list_next (walk)) {
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free_config ((GstRtpVorbisConfig *) walk->data);
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}
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g_list_free (rtpvorbisdepay->configs);
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rtpvorbisdepay->configs = NULL;
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}
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static void
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gst_rtp_vorbis_depay_finalize (GObject * object)
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{
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@ -129,54 +156,6 @@ gst_rtp_vorbis_depay_finalize (GObject * object)
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static const guint8 a2bin[256] = {
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
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52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
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64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
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64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
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41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
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};
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static guint
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decode_base64 (const gchar * in, guint8 * out)
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{
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guint8 v1, v2;
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guint len = 0;
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v1 = a2bin[(gint) * in];
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while (v1 <= 63) {
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/* read 4 bytes, write 3 bytes, invalid base64 are zeroes */
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v2 = a2bin[(gint) * ++in];
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*out++ = (v1 << 2) | ((v2 & 0x3f) >> 4);
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v1 = (v2 > 63 ? 64 : a2bin[(gint) * ++in]);
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*out++ = (v2 << 4) | ((v1 & 0x3f) >> 2);
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v2 = (v1 > 63 ? 64 : a2bin[(gint) * ++in]);
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*out++ = (v1 << 6) | (v2 & 0x3f);
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v1 = (v2 > 63 ? 64 : a2bin[(gint) * ++in]);
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len += 3;
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}
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/* move to '\0' */
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while (*in != '\0')
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in++;
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/* subtract padding */
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while (len > 0 && *--in == '=')
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len--;
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return len;
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}
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static gboolean
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gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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const gchar * configuration)
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@ -184,15 +163,18 @@ gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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GstBuffer *buf;
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guint32 num_headers;
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guint8 *data;
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guint size;
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GstBuffer *confbuf;
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gsize size;
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guint offset;
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gint i, j;
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/* deserialize base64 to buffer */
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size = strlen (configuration);
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GST_DEBUG_OBJECT (rtpvorbisdepay, "base64 config size %u", size);
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data = g_base64_decode (configuration, &size);
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data = g_malloc (size);
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size = decode_base64 (configuration, data);
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confbuf = gst_buffer_new ();
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GST_BUFFER_DATA (confbuf) = data;
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GST_BUFFER_MALLOCDATA (confbuf) = data;
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GST_BUFFER_SIZE (confbuf) = size;
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GST_DEBUG_OBJECT (rtpvorbisdepay, "config size %u", size);
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@ -215,6 +197,7 @@ gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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num_headers = GST_READ_UINT32_BE (data);
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size -= 4;
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data += 4;
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offset = 4;
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GST_DEBUG_OBJECT (rtpvorbisdepay, "have %u headers", num_headers);
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@ -257,6 +240,7 @@ gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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n_headers = data[5];
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size -= 6;
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data += 6;
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offset += 6;
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GST_DEBUG_OBJECT (rtpvorbisdepay,
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"header %d, ident 0x%08x, length %u, left %u", i, ident, length, size);
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@ -275,10 +259,15 @@ gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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if (size < 1)
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goto too_small;
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b = *data++;
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offset++;
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size--;
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h_size = (h_size << 7) | (b & 0x7f);
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} while (b & 0x80);
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GST_DEBUG_OBJECT (rtpvorbisdepay, "headers %d: size: %u", j, h_size);
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if (length < h_size)
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goto too_small;
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h_sizes[j] = h_size;
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length -= h_size;
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}
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@ -294,20 +283,22 @@ gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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guint h_size;
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h_size = h_sizes[j];
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if (size < h_size)
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if (size < h_size) {
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free_config (conf);
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goto too_small;
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}
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GST_DEBUG_OBJECT (rtpvorbisdepay, "reading header %d, size %u", j,
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h_size);
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buf = gst_buffer_new_and_alloc (h_size);
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memcpy (GST_BUFFER_DATA (buf), data, h_size);
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buf = gst_buffer_create_sub (confbuf, offset, h_size);
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conf->headers = g_list_append (conf->headers, buf);
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data += h_size;
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offset += h_size;
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size -= h_size;
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}
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rtpvorbisdepay->configs = g_list_append (rtpvorbisdepay->configs, conf);
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}
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gst_buffer_unref (confbuf);
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return TRUE;
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@ -315,6 +306,7 @@ gst_rtp_vorbis_depay_parse_configuration (GstRtpVorbisDepay * rtpvorbisdepay,
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too_small:
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{
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GST_DEBUG_OBJECT (rtpvorbisdepay, "configuration too small");
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gst_buffer_unref (confbuf);
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return FALSE;
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}
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}
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@ -637,6 +629,9 @@ gst_rtp_vorbis_depay_change_state (GstElement * element,
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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free_indents (rtpvorbisdepay);
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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break;
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default:
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