mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-23 00:36:51 +00:00
closedcaption: move CC buffering to helper object
Move most of the interesting code from ccconverter to this new helper object. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3211>
This commit is contained in:
Matthew Waters
GStreamer Marge Bot
parent
06a20f9243
commit
088597b430
5 changed files with 775 additions and 886 deletions
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@ -31,6 +31,8 @@ GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
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typedef struct cdp_fps_entry cdp_fps_entry;
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#define VAL_OR_0(v) ((v) ? (*(v)) : 0)
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static const struct cdp_fps_entry cdp_fps_table[] = {
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{0x1f, 24000, 1001, 25, 22, 3 /* FIXME: alternating max cea608 count! */ },
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{0x2f, 24, 1, 25, 22, 2},
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@ -333,3 +335,573 @@ convert_cea708_cdp_to_cc_data (GstObject * dbg_obj,
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/* skip everything else we don't care about */
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return len;
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}
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#define CC_DATA_EXTRACT_TOO_MANY_FIELD1 -2
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#define CC_DATA_EXTRACT_TOO_MANY_FIELD2 -3
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static gint
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cc_data_extract_cea608 (const guint8 * cc_data, guint cc_data_len,
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guint8 * cea608_field1, guint * cea608_field1_len,
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guint8 * cea608_field2, guint * cea608_field2_len)
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{
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guint i, field_1_len = 0, field_2_len = 0;
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if (cea608_field1_len) {
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field_1_len = *cea608_field1_len;
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*cea608_field1_len = 0;
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}
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if (cea608_field2_len) {
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field_2_len = *cea608_field2_len;
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*cea608_field2_len = 0;
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}
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if (cc_data_len % 3 != 0) {
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GST_WARNING ("Invalid cc_data buffer size %u. Truncating to a multiple "
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"of 3", cc_data_len);
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cc_data_len = cc_data_len - (cc_data_len % 3);
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}
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for (i = 0; i < cc_data_len / 3; i++) {
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guint8 byte0 = cc_data[i * 3 + 0];
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guint8 byte1 = cc_data[i * 3 + 1];
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guint8 byte2 = cc_data[i * 3 + 2];
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gboolean cc_valid = (byte0 & 0x04) == 0x04;
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guint8 cc_type = byte0 & 0x03;
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GST_TRACE ("0x%02x 0x%02x 0x%02x, valid: %u, type: 0b%u%u", byte0, byte1,
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byte2, cc_valid, (cc_type & 0x2) == 0x2, (cc_type & 0x1) == 0x1);
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if (cc_type == 0x00) {
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if (!cc_valid)
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continue;
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if (cea608_field1 && cea608_field1_len) {
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if (*cea608_field1_len + 2 > field_1_len) {
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GST_WARNING ("Too many cea608 input bytes %u for field 1",
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*cea608_field1_len + 2);
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return CC_DATA_EXTRACT_TOO_MANY_FIELD1;
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}
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if (byte1 != 0x80 || byte2 != 0x80) {
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cea608_field1[(*cea608_field1_len)++] = byte1;
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cea608_field1[(*cea608_field1_len)++] = byte2;
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}
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}
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} else if (cc_type == 0x01) {
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if (!cc_valid)
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continue;
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if (cea608_field2 && cea608_field2_len) {
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if (*cea608_field2_len + 2 > field_2_len) {
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GST_WARNING ("Too many cea608 input bytes %u for field 2",
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*cea608_field2_len + 2);
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return CC_DATA_EXTRACT_TOO_MANY_FIELD2;
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}
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if (byte1 != 0x80 || byte2 != 0x80) {
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cea608_field2[(*cea608_field2_len)++] = byte1;
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cea608_field2[(*cea608_field2_len)++] = byte2;
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}
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}
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} else {
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/* all cea608 packets must be at the beginning of a cc_data */
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break;
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}
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}
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g_assert_cmpint (i * 3, <=, cc_data_len);
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GST_LOG ("Extracted cea608-1 of length %u and cea608-2 of length %u, "
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"ccp_offset %i", VAL_OR_0 (cea608_field1_len),
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VAL_OR_0 (cea608_field2_len), i * 3);
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return i * 3;
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}
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gint
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drop_ccp_from_cc_data (guint8 * cc_data, guint cc_data_len)
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{
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return cc_data_extract_cea608 (cc_data, cc_data_len, NULL, NULL, NULL, NULL);
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}
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#define DEFAULT_MAX_BUFFER_TIME (100 * GST_MSECOND)
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struct _CCBuffer
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{
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GstObject parent;
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GArray *cea608_1;
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GArray *cea608_2;
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GArray *cc_data;
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/* used for tracking which field to write across output buffer boundaries */
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gboolean last_cea608_written_was_field1;
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GstClockTime max_buffer_time;
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};
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G_DEFINE_TYPE (CCBuffer, cc_buffer, G_TYPE_OBJECT);
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CCBuffer *
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cc_buffer_new (void)
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{
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return g_object_new (cc_buffer_get_type (), NULL);
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}
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static void
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cc_buffer_init (CCBuffer * buf)
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{
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buf->cea608_1 = g_array_new (FALSE, FALSE, sizeof (guint8));
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buf->cea608_2 = g_array_new (FALSE, FALSE, sizeof (guint8));
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buf->cc_data = g_array_new (FALSE, FALSE, sizeof (guint8));
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buf->max_buffer_time = DEFAULT_MAX_BUFFER_TIME;
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}
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static void
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cc_buffer_finalize (GObject * object)
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{
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CCBuffer *buf = GST_CC_BUFFER (object);
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g_array_unref (buf->cea608_1);
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buf->cea608_1 = NULL;
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g_array_unref (buf->cea608_2);
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buf->cea608_2 = NULL;
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g_array_unref (buf->cc_data);
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buf->cc_data = NULL;
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G_OBJECT_CLASS (cc_buffer_parent_class)->finalize (object);
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}
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static void
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cc_buffer_class_init (CCBufferClass * buf_class)
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{
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GObjectClass *gobject_class = (GObjectClass *) buf_class;
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gobject_class->finalize = cc_buffer_finalize;
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}
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/* remove padding bytes from a cc_data packet. Returns the length of the new
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* data in @cc_data */
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static guint
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compact_cc_data (guint8 * cc_data, guint cc_data_len)
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{
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gboolean started_ccp = FALSE;
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guint out_len = 0;
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guint i;
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if (cc_data_len % 3 != 0) {
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GST_WARNING ("Invalid cc_data buffer size");
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cc_data_len = cc_data_len - (cc_data_len % 3);
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}
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for (i = 0; i < cc_data_len / 3; i++) {
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gboolean cc_valid = (cc_data[i * 3] & 0x04) == 0x04;
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guint8 cc_type = cc_data[i * 3] & 0x03;
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if (!started_ccp && (cc_type == 0x00 || cc_type == 0x01)) {
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if (cc_valid) {
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/* copy over valid 608 data */
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cc_data[out_len++] = cc_data[i * 3];
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cc_data[out_len++] = cc_data[i * 3 + 1];
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cc_data[out_len++] = cc_data[i * 3 + 2];
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}
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continue;
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}
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if (cc_type & 0x10)
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started_ccp = TRUE;
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if (!cc_valid)
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continue;
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if (cc_type == 0x00 || cc_type == 0x01) {
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GST_WARNING ("Invalid cc_data. cea608 bytes after cea708");
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return 0;
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}
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cc_data[out_len++] = cc_data[i * 3];
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cc_data[out_len++] = cc_data[i * 3 + 1];
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cc_data[out_len++] = cc_data[i * 3 + 2];
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}
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GST_LOG ("compacted cc_data from %u to %u", cc_data_len, out_len);
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return out_len;
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}
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static guint
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calculate_n_cea608_doubles_from_time_ceil (CCBuffer * buf, GstClockTime ns)
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{
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/* cea608 has a maximum bitrate of 60000/1001 * 2 bytes/s */
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guint ret = gst_util_uint64_scale_ceil (ns, 120000, 1001 * GST_SECOND);
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return GST_ROUND_UP_2 (ret);
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}
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static guint
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calculate_n_cea708_doubles_from_time_ceil (CCBuffer * buf, GstClockTime ns)
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{
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/* ccp has a maximum bitrate of 9600000/1001 bits/s */
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guint ret = gst_util_uint64_scale_ceil (ns, 9600000 / 8, 1001 * GST_SECOND);
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return GST_ROUND_UP_2 (ret);
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}
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static void
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push_internal (CCBuffer * buf, const guint8 * cea608_1,
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guint cea608_1_len, const guint8 * cea608_2, guint cea608_2_len,
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const guint8 * cc_data, guint cc_data_len)
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{
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guint max_cea608_bytes;
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GST_DEBUG_OBJECT (buf, "pushing cea608-1: %u cea608-2: %u ccp: %u",
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cea608_1_len, cea608_2_len, cc_data_len);
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max_cea608_bytes =
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calculate_n_cea608_doubles_from_time_ceil (buf, buf->max_buffer_time);
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if (cea608_1_len > 0) {
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if (cea608_1_len + buf->cea608_1->len > max_cea608_bytes) {
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GST_WARNING_OBJECT (buf, "cea608 field 1 overflow, dropping all "
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"previous data, max %u, attempted to hold %u", max_cea608_bytes,
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cea608_1_len + buf->cea608_1->len);
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g_array_set_size (buf->cea608_1, 0);
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}
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g_array_append_vals (buf->cea608_1, cea608_1, cea608_1_len);
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}
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if (cea608_2_len > 0) {
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if (cea608_2_len + buf->cea608_2->len > max_cea608_bytes) {
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GST_WARNING_OBJECT (buf, "cea608 field 2 overflow, dropping all "
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"previous data, max %u, attempted to hold %u", max_cea608_bytes,
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cea608_2_len + buf->cea608_2->len);
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g_array_set_size (buf->cea608_2, 0);
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}
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g_array_append_vals (buf->cea608_2, cea608_2, cea608_2_len);
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}
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if (cc_data_len > 0) {
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guint max_cea708_bytes =
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calculate_n_cea708_doubles_from_time_ceil (buf, buf->max_buffer_time);
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if (cc_data_len + buf->cc_data->len > max_cea708_bytes) {
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GST_WARNING_OBJECT (buf, "ccp data overflow, dropping all "
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"previous data, max %u, attempted to hold %u", max_cea708_bytes,
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cc_data_len + buf->cc_data->len);
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g_array_set_size (buf->cea608_2, 0);
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}
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g_array_append_vals (buf->cc_data, cc_data, cc_data_len);
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}
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}
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void
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cc_buffer_push_separated (CCBuffer * buf, const guint8 * cea608_1,
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guint cea608_1_len, const guint8 * cea608_2, guint cea608_2_len,
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const guint8 * cc_data, guint cc_data_len)
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{
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guint8 cea608_1_copy[MAX_CEA608_LEN];
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guint8 cea608_2_copy[MAX_CEA608_LEN];
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guint8 cc_data_copy[MAX_CDP_PACKET_LEN];
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guint i;
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if (cea608_1 && cea608_1_len > 0) {
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guint out_i = 0;
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for (i = 0; i < cea608_1_len / 2; i++) {
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if (cea608_1[i] != 0x80 || cea608_1[i + 1] != 0x80) {
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cea608_1_copy[out_i++] = cea608_1[i];
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cea608_1_copy[out_i++] = cea608_1[i + 1];
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}
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}
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cea608_1_len = out_i;
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} else {
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cea608_1_len = 0;
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}
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if (cea608_2 && cea608_2_len > 0) {
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guint out_i = 0;
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for (i = 0; i < cea608_2_len / 2; i++) {
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if (cea608_2[i] != 0x80 || cea608_2[i + 1] != 0x80) {
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cea608_2_copy[out_i++] = cea608_2[i];
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cea608_2_copy[out_i++] = cea608_2[i + 1];
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}
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}
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cea608_2_len = out_i;
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} else {
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cea608_2_len = 0;
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}
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if (cc_data && cc_data_len > 0) {
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memcpy (cc_data_copy, cc_data, cc_data_len);
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cc_data_len = compact_cc_data (cc_data_copy, cc_data_len);
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} else {
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cc_data_len = 0;
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}
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push_internal (buf, cea608_1_copy, cea608_1_len, cea608_2_copy,
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cea608_2_len, cc_data_copy, cc_data_len);
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}
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void
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cc_buffer_push_cc_data (CCBuffer * buf, const guint8 * cc_data,
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guint cc_data_len)
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{
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guint8 cea608_1[MAX_CEA608_LEN];
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guint8 cea608_2[MAX_CEA608_LEN];
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guint8 cc_data_copy[MAX_CDP_PACKET_LEN];
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guint cea608_1_len = MAX_CEA608_LEN;
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guint cea608_2_len = MAX_CEA608_LEN;
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int ccp_offset;
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memcpy (cc_data_copy, cc_data, cc_data_len);
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cc_data_len = compact_cc_data (cc_data_copy, cc_data_len);
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ccp_offset = cc_data_extract_cea608 (cc_data_copy, cc_data_len, cea608_1,
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&cea608_1_len, cea608_2, &cea608_2_len);
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if (ccp_offset < 0) {
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GST_WARNING_OBJECT (buf, "Failed to extract cea608 from cc_data");
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return;
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}
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push_internal (buf, cea608_1, cea608_1_len, cea608_2,
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cea608_2_len, &cc_data_copy[ccp_offset], cc_data_len - ccp_offset);
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}
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void
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cc_buffer_get_stored_size (CCBuffer * buf, guint * cea608_1_len,
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guint * cea608_2_len, guint * cc_data_len)
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{
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if (cea608_1_len)
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*cea608_1_len = buf->cea608_1->len;
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if (cea608_2_len)
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*cea608_2_len = buf->cea608_2->len;
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if (cc_data_len)
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*cc_data_len = buf->cc_data->len;
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}
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void
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cc_buffer_discard (CCBuffer * buf)
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{
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g_array_set_size (buf->cea608_1, 0);
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g_array_set_size (buf->cea608_2, 0);
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g_array_set_size (buf->cc_data, 0);
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}
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#if 0
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void
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cc_buffer_peek (CCBuffer * buf, guint8 ** cea608_1, guint * cea608_1_len,
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guint8 ** cea608_2, guint * cea608_2_len, guint8 ** cc_data,
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guint * cc_data_len)
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{
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if (cea608_1_len) {
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if (cea608_1) {
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*cea608_1 = (guint8 *) buf->cea608_1->data;
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}
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*cea608_1_len = buf->cea608_1->len;
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}
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if (cea608_1_len) {
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if (cea608_2) {
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*cea608_2 = (guint8 *) buf->cea608_2->data;
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}
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*cea608_2_len = buf->cea608_2->len;
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}
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if (cc_data_len) {
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if (cc_data) {
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*cc_data = (guint8 *) buf->cc_data->data;
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}
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*cc_data_len = buf->cc_data->len;
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}
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}
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#endif
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static void
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cc_buffer_get_out_sizes (CCBuffer * buf, const struct cdp_fps_entry *fps_entry,
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guint * cea608_1_len, guint * field1_padding, guint * cea608_2_len,
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guint * field2_padding, guint * cc_data_len)
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{
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gint extra_ccp = 0, extra_cea608_1 = 0, extra_cea608_2 = 0;
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gint write_ccp_size = 0, write_cea608_1_size = 0, write_cea608_2_size = 0;
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gboolean wrote_first = FALSE;
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if (buf->cc_data->len) {
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extra_ccp = buf->cc_data->len - 3 * fps_entry->max_ccp_count;
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extra_ccp = MAX (0, extra_ccp);
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write_ccp_size = buf->cc_data->len - extra_ccp;
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}
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extra_cea608_1 = buf->cea608_1->len;
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extra_cea608_2 = buf->cea608_2->len;
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*field1_padding = 0;
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*field2_padding = 0;
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wrote_first = !buf->last_cea608_written_was_field1;
|
||||
/* try to push data into the packets. Anything 'extra' will be
|
||||
* stored for later */
|
||||
while (TRUE) {
|
||||
gint avail_1, avail_2;
|
||||
|
||||
avail_1 = buf->cea608_1->len - extra_cea608_1 + *field1_padding;
|
||||
avail_2 = buf->cea608_2->len - extra_cea608_2 + *field2_padding;
|
||||
if (avail_1 + avail_2 >= 2 * fps_entry->max_cea608_count)
|
||||
break;
|
||||
|
||||
if (wrote_first) {
|
||||
if (extra_cea608_1 > 0) {
|
||||
extra_cea608_1 -= 2;
|
||||
g_assert_cmpint (extra_cea608_1, >=, 0);
|
||||
write_cea608_1_size += 2;
|
||||
g_assert_cmpint (write_cea608_1_size, <=, buf->cea608_1->len);
|
||||
} else {
|
||||
*field1_padding += 2;
|
||||
}
|
||||
}
|
||||
|
||||
avail_1 = buf->cea608_1->len - extra_cea608_1 + *field1_padding;
|
||||
avail_2 = buf->cea608_2->len - extra_cea608_2 + *field2_padding;
|
||||
if (avail_1 + avail_2 >= 2 * fps_entry->max_cea608_count)
|
||||
break;
|
||||
|
||||
if (extra_cea608_2 > 0) {
|
||||
extra_cea608_2 -= 2;
|
||||
g_assert_cmpint (extra_cea608_2, >=, 0);
|
||||
write_cea608_2_size += 2;
|
||||
g_assert_cmpint (write_cea608_2_size, <=, buf->cea608_2->len);
|
||||
} else {
|
||||
/* we need to insert field 2 padding if we don't have data and are
|
||||
* requested to start with field2 */
|
||||
*field2_padding += 2;
|
||||
}
|
||||
wrote_first = TRUE;
|
||||
}
|
||||
|
||||
GST_TRACE_OBJECT (buf, "allocated sizes ccp:%u, cea608-1:%u (pad:%u), "
|
||||
"cea608-2:%u (pad:%u)", write_ccp_size, write_cea608_1_size,
|
||||
*field1_padding, write_cea608_2_size, *field2_padding);
|
||||
|
||||
*cea608_1_len = write_cea608_1_size;
|
||||
*cea608_2_len = write_cea608_2_size;
|
||||
*cc_data_len = write_ccp_size;
|
||||
}
|
||||
|
||||
void
|
||||
cc_buffer_take_separated (CCBuffer * buf,
|
||||
const struct cdp_fps_entry *fps_entry, guint8 * cea608_1,
|
||||
guint * cea608_1_len, guint8 * cea608_2, guint * cea608_2_len,
|
||||
guint8 * cc_data, guint * cc_data_len)
|
||||
{
|
||||
guint write_cea608_1_size, write_cea608_2_size, write_ccp_size;
|
||||
guint field1_padding, field2_padding;
|
||||
|
||||
cc_buffer_get_out_sizes (buf, fps_entry, &write_cea608_1_size,
|
||||
&field1_padding, &write_cea608_2_size, &field2_padding, &write_ccp_size);
|
||||
|
||||
if (cea608_1_len) {
|
||||
if (*cea608_1_len < write_cea608_1_size + field1_padding) {
|
||||
GST_WARNING_OBJECT (buf, "output cea608 field 1 buffer (%u) is too "
|
||||
"small to hold output (%u)", *cea608_1_len,
|
||||
write_cea608_1_size + field1_padding);
|
||||
*cea608_1_len = 0;
|
||||
} else if (cea608_1) {
|
||||
memcpy (cea608_1, buf->cea608_1->data, write_cea608_1_size);
|
||||
memset (&cea608_1[write_cea608_1_size], 0x80, field1_padding);
|
||||
*cea608_1_len = write_cea608_1_size + field1_padding;
|
||||
} else {
|
||||
*cea608_1_len = 0;
|
||||
}
|
||||
}
|
||||
if (cea608_2_len) {
|
||||
if (*cea608_2_len < write_cea608_2_size + field2_padding) {
|
||||
GST_WARNING_OBJECT (buf, "output cea608 field 2 buffer (%u) is too "
|
||||
"small to hold output (%u)", *cea608_2_len, write_cea608_2_size);
|
||||
*cea608_2_len = 0;
|
||||
} else if (cea608_2) {
|
||||
memcpy (cea608_2, buf->cea608_2->data, write_cea608_2_size);
|
||||
memset (&cea608_2[write_cea608_2_size], 0x80, field2_padding);
|
||||
*cea608_2_len = write_cea608_2_size + field2_padding;
|
||||
} else {
|
||||
*cea608_2_len = 0;
|
||||
}
|
||||
}
|
||||
if (cc_data_len) {
|
||||
if (*cc_data_len < write_ccp_size) {
|
||||
GST_WARNING_OBJECT (buf, "output ccp buffer (%u) is too "
|
||||
"small to hold output (%u)", *cc_data_len, write_ccp_size);
|
||||
*cc_data_len = 0;
|
||||
} else if (cc_data) {
|
||||
memcpy (cc_data, buf->cc_data->data, write_ccp_size);
|
||||
*cc_data_len = write_ccp_size;
|
||||
} else {
|
||||
*cc_data_len = 0;
|
||||
}
|
||||
}
|
||||
|
||||
g_array_remove_range (buf->cea608_1, 0, write_cea608_1_size);
|
||||
g_array_remove_range (buf->cea608_2, 0, write_cea608_2_size);
|
||||
g_array_remove_range (buf->cc_data, 0, write_ccp_size);
|
||||
|
||||
GST_LOG_OBJECT (buf, "bytes currently stored, cea608-1:%u, cea608-2:%u "
|
||||
"ccp:%u", buf->cea608_1->len, buf->cea608_2->len, buf->cc_data->len);
|
||||
}
|
||||
|
||||
void
|
||||
cc_buffer_take_cc_data (CCBuffer * buf,
|
||||
const struct cdp_fps_entry *fps_entry, guint8 * cc_data,
|
||||
guint * cc_data_len)
|
||||
{
|
||||
guint write_cea608_1_size, write_cea608_2_size, write_ccp_size;
|
||||
guint field1_padding, field2_padding;
|
||||
gboolean wrote_first;
|
||||
|
||||
cc_buffer_get_out_sizes (buf, fps_entry, &write_cea608_1_size,
|
||||
&field1_padding, &write_cea608_2_size, &field2_padding, &write_ccp_size);
|
||||
|
||||
{
|
||||
guint cea608_1_i = 0, cea608_2_i = 0;
|
||||
guint out_i = 0;
|
||||
guint8 *cea608_1 = (guint8 *) buf->cea608_1->data;
|
||||
guint8 *cea608_2 = (guint8 *) buf->cea608_2->data;
|
||||
guint cea608_output_count =
|
||||
write_cea608_1_size + write_cea608_2_size + field1_padding +
|
||||
field2_padding;
|
||||
|
||||
wrote_first = !buf->last_cea608_written_was_field1;
|
||||
while (cea608_1_i + cea608_2_i < cea608_output_count) {
|
||||
if (wrote_first) {
|
||||
if (cea608_1_i < write_cea608_1_size) {
|
||||
cc_data[out_i++] = 0xfc;
|
||||
cc_data[out_i++] = cea608_1[cea608_1_i];
|
||||
cc_data[out_i++] = cea608_1[cea608_1_i + 1];
|
||||
cea608_1_i += 2;
|
||||
buf->last_cea608_written_was_field1 = TRUE;
|
||||
} else if (cea608_1_i < write_cea608_1_size + field1_padding) {
|
||||
cc_data[out_i++] = 0xf8;
|
||||
cc_data[out_i++] = 0x80;
|
||||
cc_data[out_i++] = 0x80;
|
||||
cea608_1_i += 2;
|
||||
buf->last_cea608_written_was_field1 = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
if (cea608_2_i < write_cea608_2_size) {
|
||||
cc_data[out_i++] = 0xfd;
|
||||
cc_data[out_i++] = cea608_2[cea608_2_i];
|
||||
cc_data[out_i++] = cea608_2[cea608_2_i + 1];
|
||||
cea608_2_i += 2;
|
||||
buf->last_cea608_written_was_field1 = FALSE;
|
||||
} else if (cea608_2_i < write_cea608_2_size + field2_padding) {
|
||||
cc_data[out_i++] = 0xf9;
|
||||
cc_data[out_i++] = 0x80;
|
||||
cc_data[out_i++] = 0x80;
|
||||
cea608_2_i += 2;
|
||||
buf->last_cea608_written_was_field1 = FALSE;
|
||||
}
|
||||
|
||||
wrote_first = TRUE;
|
||||
}
|
||||
|
||||
if (write_ccp_size > 0)
|
||||
memcpy (&cc_data[out_i], buf->cc_data->data, write_ccp_size);
|
||||
*cc_data_len = out_i + write_ccp_size;
|
||||
}
|
||||
|
||||
g_array_remove_range (buf->cea608_1, 0, write_cea608_1_size);
|
||||
g_array_remove_range (buf->cea608_2, 0, write_cea608_2_size);
|
||||
g_array_remove_range (buf->cc_data, 0, write_ccp_size);
|
||||
|
||||
GST_LOG_OBJECT (buf, "bytes currently stored, cea608-1:%u, cea608-2:%u "
|
||||
"ccp:%u", buf->cea608_1->len, buf->cea608_2->len, buf->cc_data->len);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -50,6 +50,7 @@ typedef enum {
|
|||
GST_CC_CDP_MODE_CC_SVC_INFO = (1<<2)
|
||||
} GstCCCDPMode;
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
guint convert_cea708_cc_data_to_cdp (GstObject * dbg_obj,
|
||||
GstCCCDPMode cdp_mode,
|
||||
guint16 cdp_hdr_sequence_cntr,
|
||||
|
|
@ -60,14 +61,60 @@ guint convert_cea708_cc_data_to_cdp (GstObject * dbg_obj,
|
|||
const GstVideoTimeCode * tc,
|
||||
const struct cdp_fps_entry *fps_entry);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
guint convert_cea708_cdp_to_cc_data (GstObject * dbg_obj,
|
||||
const guint8 * cdp,
|
||||
guint cdp_len,
|
||||
guint8 *cc_data,
|
||||
GstVideoTimeCode * tc,
|
||||
const struct cdp_fps_entry **out_fps_entry);
|
||||
G_GNUC_INTERNAL
|
||||
gint drop_ccp_from_cc_data (guint8 * cc_data,
|
||||
guint cc_data_len);
|
||||
|
||||
#define MAX_CDP_PACKET_LEN 256
|
||||
#define MAX_CEA608_LEN 32
|
||||
|
||||
G_DECLARE_FINAL_TYPE (CCBuffer, cc_buffer, GST, CC_BUFFER, GObject);
|
||||
|
||||
G_GNUC_INTERNAL
|
||||
CCBuffer * cc_buffer_new (void);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_get_stored_size (CCBuffer * buf,
|
||||
guint * cea608_1_len,
|
||||
guint * cea608_2_len,
|
||||
guint * cc_data_len);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_push_separated (CCBuffer * buf,
|
||||
const guint8 * cea608_1,
|
||||
guint cea608_1_len,
|
||||
const guint8 * cea608_2,
|
||||
guint cea608_2_len,
|
||||
const guint8 * cc_data,
|
||||
guint cc_data_len);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_push_cc_data (CCBuffer * buf,
|
||||
const guint8 * cc_data,
|
||||
guint cc_data_len);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_take_cc_data (CCBuffer * buf,
|
||||
const struct cdp_fps_entry * fps_entry,
|
||||
guint8 * cc_data,
|
||||
guint * cc_data_len);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_take_separated (CCBuffer * buf,
|
||||
const struct cdp_fps_entry * fps_entry,
|
||||
guint8 * cea608_1,
|
||||
guint * cea608_1_len,
|
||||
guint8 * cea608_2,
|
||||
guint * cea608_2_len,
|
||||
guint8 * cc_data,
|
||||
guint * cc_data_len);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_discard (CCBuffer * buf);
|
||||
G_GNUC_INTERNAL
|
||||
void cc_buffer_set_max_buffer_time (CCBuffer * buf,
|
||||
GstClockTime max_time);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load diff
|
|
@ -25,6 +25,8 @@
|
|||
#include <gst/base/base.h>
|
||||
#include <gst/video/video.h>
|
||||
|
||||
#include "ccutils.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
#define GST_TYPE_CCCONVERTER \
|
||||
(gst_cc_converter_get_type())
|
||||
|
|
@ -40,9 +42,6 @@ G_BEGIN_DECLS
|
|||
typedef struct _GstCCConverter GstCCConverter;
|
||||
typedef struct _GstCCConverterClass GstCCConverterClass;
|
||||
|
||||
#define MAX_CDP_PACKET_LEN 256
|
||||
#define MAX_CEA608_LEN 32
|
||||
|
||||
typedef enum {
|
||||
GST_CC_CONVERTER_CDP_MODE_TIME_CODE = (1<<0),
|
||||
GST_CC_CONVERTER_CDP_MODE_CC_DATA = (1<<1),
|
||||
|
|
@ -67,21 +66,13 @@ struct _GstCCConverter
|
|||
/* for framerate differences, we need to keep previous/next frames in order
|
||||
* to split/merge data across multiple input or output buffers. The data is
|
||||
* stored as cc_data */
|
||||
guint8 scratch_cea608_1[MAX_CEA608_LEN];
|
||||
guint scratch_cea608_1_len;
|
||||
guint8 scratch_cea608_2[MAX_CEA608_LEN];
|
||||
guint scratch_cea608_2_len;
|
||||
guint8 scratch_ccp[MAX_CDP_PACKET_LEN];
|
||||
guint scratch_ccp_len;
|
||||
CCBuffer *cc_buffer;
|
||||
|
||||
guint input_frames;
|
||||
guint output_frames;
|
||||
GstVideoTimeCode current_output_timecode;
|
||||
/* previous buffer for copying metas onto */
|
||||
GstBuffer *previous_buffer;
|
||||
|
||||
/* used for tracking which field to write across output buffer boundaries */
|
||||
gboolean last_cea608_written_was_field1;
|
||||
};
|
||||
|
||||
struct _GstCCConverterClass
|
||||
|
|
|
|||
|
|
@ -476,12 +476,12 @@ GST_START_TEST (convert_cea708_cdp_cea608_raw)
|
|||
{ 0x96, 0x69, 0x13, 0x5f, 0x43, 0x00, 0x00, 0x72, 0xe2, 0xfc, 0x80, 0x80,
|
||||
0xfd, 0x80, 0x80, 0x74, 0x00, 0x00, 0x8a
|
||||
};
|
||||
const guint8 out1[] = { 0x80, 0x80, 0x80, 0x80 };
|
||||
const guint8 out1[] = { 0x80, 0x80, };
|
||||
const guint8 in2[] =
|
||||
{ 0x96, 0x69, 0x13, 0x5f, 0x43, 0x00, 0x00, 0x72, 0xe2, 0xfc, 0x80, 0x81,
|
||||
0xfd, 0x82, 0x83, 0x74, 0x00, 0x00, 0x8a
|
||||
};
|
||||
const guint8 out2[] = { 0x80, 0x81, 0x80, 0x80 };
|
||||
const guint8 out2[] = { 0x80, 0x81, };
|
||||
check_conversion_tc_passthrough (in1, sizeof (in1), out1, sizeof (out1),
|
||||
"closedcaption/x-cea-708,format=(string)cdp,framerate=30/1",
|
||||
"closedcaption/x-cea-608,format=(string)raw");
|
||||
|
|
@ -514,7 +514,7 @@ GST_START_TEST (convert_cea708_cdp_cea708_cc_data)
|
|||
};
|
||||
const guint8 out[] = { 0xf8, 0x80, 0x80, 0xf9, 0x80, 0x80 };
|
||||
check_conversion_tc_passthrough (in, sizeof (in), out, sizeof (out),
|
||||
"closedcaption/x-cea-708,format=(string)cdp",
|
||||
"closedcaption/x-cea-708,format=(string)cdp,framerate=30/1",
|
||||
"closedcaption/x-cea-708,format=(string)cc_data");
|
||||
}
|
||||
|
||||
|
|
@ -524,17 +524,23 @@ GST_START_TEST (convert_cea708_cdp_cea708_cc_data_too_big)
|
|||
{
|
||||
/* tests that too large input is truncated */
|
||||
const guint8 in[] =
|
||||
{ 0x96, 0x69, 0x2e, 0x8f, 0x43, 0x00, 0x00, 0x72, 0xeb, 0xfc, 0x80, 0x80,
|
||||
{ 0x96, 0x69, 0x4c, 0x8f, 0x43, 0x00, 0x00, 0x72, 0xf5, 0xfc, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0x74, 0x00, 0x00, 0x8a,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0x74, 0x00, 0x00, 0x8a,
|
||||
};
|
||||
const guint8 out[] = { 0xf8, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
const guint8 out[] = { 0xf8, 0x80, 0x80, 0xf9, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80, 0xfe, 0x80, 0x80,
|
||||
0xfe, 0x80, 0x80
|
||||
};
|
||||
check_conversion_tc_passthrough (in, sizeof (in), out, sizeof (out),
|
||||
"closedcaption/x-cea-708,format=(string)cdp",
|
||||
"closedcaption/x-cea-708,format=(string)cdp,framerate=30/1",
|
||||
"closedcaption/x-cea-708,format=(string)cc_data");
|
||||
}
|
||||
|
||||
|
|
@ -1131,12 +1137,12 @@ GST_START_TEST (convert_cea708_cc_data_cea708_cdp_field1_overflow)
|
|||
gsize in_data_offset;
|
||||
/* take frames sequentially from the input */
|
||||
gsize in_idx = i / 2;
|
||||
/* take the first 16 input frames, then skip the next 16 frames and take
|
||||
* the next 16 frames etc.
|
||||
* 32 is the byte size of the internal cea608 field buffers that we are
|
||||
/* take the first 12 input frames, then skip the next 12 frames and take
|
||||
* the next 12 frames etc.
|
||||
* 24 is the byte size of the internal cea608 field buffers that we are
|
||||
* overflowing but every second buffer will have cea608 field 1 in it.
|
||||
* 16 frames is 32 bytes stored and is enough to cause overflow */
|
||||
in_idx = (in_idx / 16) * 32 + in_idx % 16;
|
||||
* 12 frames is 24 bytes stored and is enough to cause overflow */
|
||||
in_idx = (in_idx / 6) * 12 + in_idx % 6;
|
||||
in_data_offset = in_idx * 3;
|
||||
|
||||
out_data[i * 43 + 9] = in_data[in_data_offset + 0];
|
||||
|
|
|
|||
Loading…
Reference in a new issue