mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-01-26 17:18:15 +00:00
rtp: Use GLib functions for encoding/decoding base64
This commit is contained in:
Sebastian Dröge
parent
8cf0e9ff87
commit
77e2637590
5 changed files with 19 additions and 187 deletions
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@ -202,54 +202,6 @@ gst_rtp_h264_depay_get_property (GObject * object, guint prop_id,
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}
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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 (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_h264_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
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{
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@ -296,10 +248,13 @@ gst_rtp_h264_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
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b64 = GST_BUFFER_DATA (codec_data);
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total = 0;
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for (i = 0; params[i]; i++) {
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guint save = 0;
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gint state = 0;
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GST_DEBUG_OBJECT (depayload, "decoding param %d", i);
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memcpy (b64, sync_bytes, sizeof (sync_bytes));
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b64 += sizeof (sync_bytes);
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len = decode_base64 (params[i], b64);
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len = g_base64_decode_step (params[i], -1, b64, &state, &save);
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total += len + sizeof (sync_bytes);
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b64 += len;
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}
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@ -335,12 +290,16 @@ gst_rtp_h264_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
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/* start with 7 bytes header */
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len = 7;
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for (i = 0; params[i]; i++) {
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gint nal_len;
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gsize nal_len;
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guint8 *nalp;
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guint save = 0;
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gint state = 0;
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nal_len = strlen (params[i]);
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nalp = g_malloc (nal_len + 2);
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nal_len = decode_base64 (params[i], nalp + 2);
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nal_len =
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g_base64_decode_step (params[i], nal_len, nalp + 2, &state, &save);
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nalp[0] = (nal_len >> 8) & 0xff;
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nalp[1] = nal_len & 0xff;
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len += nal_len + 2;
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@ -206,31 +206,6 @@ gst_rtp_h264_pay_finalize (GObject * object)
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gchar *
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encode_base64 (const guint8 * in, guint size, guint * len)
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{
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gchar *ret, *d;
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static const gchar *v =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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*len = ((size + 2) / 3) * 4;
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d = ret = (gchar *) g_malloc (*len + 1);
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for (; size; in += 3) { /* process tuplets */
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*d++ = v[in[0] >> 2]; /* byte 1: high 6 bits (1) */
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/* byte 2: low 2 bits (1), high 4 bits (2) */
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*d++ = v[((in[0] << 4) + (--size ? (in[1] >> 4) : 0)) & 0x3f];
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/* byte 3: low 4 bits (2), high 2 bits (3) */
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*d++ = size ? v[((in[1] << 2) + (--size ? (in[2] >> 6) : 0)) & 0x3f] : '=';
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/* byte 4: low 6 bits (3) */
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*d++ = size ? v[in[2] & 0x3f] : '=';
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if (size)
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size--; /* count third character if processed */
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}
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*d = '\0'; /* tie off string */
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return ret; /* return the resulting string */
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}
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static gboolean
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gst_rtp_h264_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
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{
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@ -295,7 +270,6 @@ gst_rtp_h264_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
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for (i = 0; i < num_sps; i++) {
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gchar *set;
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guint len;
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if (size < 2)
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goto avcc_error;
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@ -309,7 +283,7 @@ gst_rtp_h264_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
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if (size < nal_size)
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goto avcc_error;
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set = encode_base64 (data, nal_size, &len);
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set = g_base64_encode (data, nal_size);
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g_string_append_printf (sprops, "%s%s", count ? "," : "", set);
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count++;
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g_free (set);
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@ -328,7 +302,6 @@ gst_rtp_h264_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
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GST_DEBUG_OBJECT (rtph264pay, "num PPS %u", num_pps);
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for (i = 0; i < num_pps; i++) {
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gchar *set;
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guint len;
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if (size < 2)
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goto avcc_error;
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@ -342,7 +315,7 @@ gst_rtp_h264_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
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if (size < nal_size)
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goto avcc_error;
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set = encode_base64 (data, nal_size, &len);
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set = g_base64_encode (data, nal_size);
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g_string_append_printf (sprops, "%s%s", count ? "," : "", set);
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count++;
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g_free (set);
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@ -553,16 +526,15 @@ gst_rtp_h264_pay_parse_sps_pps (GstBaseRTPPayload * basepayload,
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gchar *sps;
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gchar *pps;
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gchar *sprops;
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guint len;
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/* profile is 24 bit. Force it to respect the limit */
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profile = g_strdup_printf ("%06x", payloader->profile & 0xffffff);
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/* build the sprop-parameter-sets */
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sps = (payloader->sps_len > 0)
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? encode_base64 (payloader->sps, payloader->sps_len, &len) : NULL;
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? g_base64_encode (payloader->sps, payloader->sps_len) : NULL;
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pps = (payloader->pps_len > 0)
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? encode_base64 (payloader->pps, payloader->pps_len, &len) : NULL;
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? g_base64_encode (payloader->pps, payloader->pps_len) : NULL;
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if (sps)
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sprops = g_strjoin (",", sps, pps, NULL);
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@ -124,6 +124,7 @@ gst_rtp_theora_depay_init (GstRtpTheoraDepay * rtptheoradepay,
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{
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rtptheoradepay->adapter = gst_adapter_new ();
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}
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static void
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gst_rtp_theora_depay_finalize (GObject * object)
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{
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@ -134,54 +135,6 @@ gst_rtp_theora_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_theora_depay_parse_configuration (GstRtpTheoraDepay * rtptheoradepay,
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const gchar * configuration)
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@ -189,15 +142,14 @@ gst_rtp_theora_depay_parse_configuration (GstRtpTheoraDepay * rtptheoradepay,
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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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gsize size;
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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 (rtptheoradepay, "base64 config size %u", size);
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data = g_malloc (size);
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size = decode_base64 (configuration, data);
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data = g_base64_decode (configuration, &size);
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GST_DEBUG_OBJECT (rtptheoradepay, "config size %u", size);
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@ -233,31 +233,6 @@ gst_rtp_theora_pay_flush_packet (GstRtpTheoraPay * rtptheorapay)
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return ret;
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}
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static gchar *
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encode_base64 (const guint8 * in, guint size, guint * len)
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{
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gchar *ret, *d;
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static const gchar *v =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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*len = ((size + 2) / 3) * 4;
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d = ret = (gchar *) g_malloc (*len + 1);
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for (; size; in += 3) { /* process tuplets */
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*d++ = v[in[0] >> 2]; /* byte 1: high 6 bits (1) */
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/* byte 2: low 2 bits (1), high 4 bits (2) */
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*d++ = v[((in[0] << 4) + (--size ? (in[1] >> 4) : 0)) & 0x3f];
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/* byte 3: low 4 bits (2), high 2 bits (3) */
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*d++ = size ? v[((in[1] << 2) + (--size ? (in[2] >> 6) : 0)) & 0x3f] : '=';
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/* byte 4: low 6 bits (3) */
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*d++ = size ? v[in[2] & 0x3f] : '=';
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if (size)
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size--; /* count third character if processed */
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}
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*d = '\0'; /* tie off string */
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return ret; /* return the resulting string */
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}
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static gboolean
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gst_rtp_theora_pay_finish_headers (GstBaseRTPPayload * basepayload)
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{
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@ -412,7 +387,7 @@ gst_rtp_theora_pay_finish_headers (GstBaseRTPPayload * basepayload)
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}
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/* serialize to base64 */
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configuration = encode_base64 (config, configlen, &size);
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configuration = g_base64_encode (config, configlen);
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g_free (config);
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/* configure payloader settings */
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@ -222,32 +222,6 @@ gst_rtp_vorbis_pay_flush_packet (GstRtpVorbisPay * rtpvorbispay)
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return ret;
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}
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static gchar *
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encode_base64 (const guint8 * in, guint size, guint * len)
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{
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gchar *ret, *d;
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static const gchar v[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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*len = ((size + 2) / 3) * 4;
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d = ret = (gchar *) g_malloc (*len + 1);
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for (; size; in += 3) { /* process tuplets */
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*d++ = v[in[0] >> 2]; /* byte 1: high 6 bits (1) */
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/* byte 2: low 2 bits (1), high 4 bits (2) */
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*d++ = v[((in[0] << 4) + (--size ? (in[1] >> 4) : 0)) & 0x3f];
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/* byte 3: low 4 bits (2), high 2 bits (3) */
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*d++ = size ? v[((in[1] << 2) + (--size ? (in[2] >> 6) : 0)) & 0x3f] : '=';
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/* byte 4: low 6 bits (3) */
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*d++ = size ? v[in[2] & 0x3f] : '=';
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if (size)
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size--; /* count third character if processed */
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}
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*d = '\0'; /* tie off string */
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return ret; /* return the resulting string */
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}
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static gboolean
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gst_rtp_vorbis_pay_finish_headers (GstBaseRTPPayload * basepayload)
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{
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@ -398,7 +372,7 @@ gst_rtp_vorbis_pay_finish_headers (GstBaseRTPPayload * basepayload)
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}
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/* serialize to base64 */
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configuration = encode_base64 (config, configlen, &size);
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configuration = g_base64_encode (config, configlen);
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g_free (config);
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/* configure payloader settings */
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