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ccconverter: don't rely on external state in *_internal()

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This allows using the _internal() variants for simply converting some
caption data without relying on any external state.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1116>
This commit is contained in:
Matthew Waters 2020-03-12 15:01:02 +11:00 committed by GStreamer Merge Bot
parent 31a0bf367d
commit 44c874fd9e
1 changed files with 32 additions and 20 deletions
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52
ext/closedcaption/gstccconverter.c
View file

@ -494,37 +494,30 @@ cdp_fps_entry_from_fps (guint fps_n, guint fps_d)
static guint
convert_cea708_cc_data_cea708_cdp_internal (GstCCConverter * self,
const guint8 * cc_data, guint cc_data_len, guint8 * cdp, guint cdp_len,
const GstVideoTimeCodeMeta * tc_meta)
const GstVideoTimeCode * tc, const struct cdp_fps_entry *fps_entry)
{
GstByteWriter bw;
guint8 flags, checksum;
guint i, len;
guint cc_count;
const struct cdp_fps_entry *fps_entry;
gst_byte_writer_init_with_data (&bw, cdp, cdp_len, FALSE);
gst_byte_writer_put_uint16_be_unchecked (&bw, 0x9669);
/* Write a length of 0 for now */
gst_byte_writer_put_uint8_unchecked (&bw, 0);
fps_entry = cdp_fps_entry_from_fps (self->out_fps_n, self->out_fps_d);
if (!fps_entry || fps_entry->fps_n == 0)
g_assert_not_reached ();
cc_count = fps_entry->max_cc_count;
gst_byte_writer_put_uint8_unchecked (&bw, fps_entry->fps_idx);
if (cc_data_len / 3 > cc_count) {
if (cc_data_len / 3 > fps_entry->max_cc_count) {
GST_WARNING_OBJECT (self, "Too many cc_data triplet for framerate: %u > %u",
cc_data_len / 3, cc_count);
cc_data_len = 3 * cc_count;
cc_data_len / 3, fps_entry->max_cc_count);
cc_data_len = 3 * fps_entry->max_cc_count;
}
/* ccdata_present | caption_service_active */
flags = 0x42;
/* time_code_present */
if (tc_meta)
if (tc)
flags |= 0x80;
/* reserved */
@ -534,9 +527,7 @@ convert_cea708_cc_data_cea708_cdp_internal (GstCCConverter * self,
gst_byte_writer_put_uint16_be_unchecked (&bw, self->cdp_hdr_sequence_cntr);
if (tc_meta) {
const GstVideoTimeCode *tc = &tc_meta->tc;
if (tc) {
gst_byte_writer_put_uint8_unchecked (&bw, 0x71);
gst_byte_writer_put_uint8_unchecked (&bw, 0xc0 |
(((tc->hours % 10) & 0x3) << 4) |
@ -559,9 +550,9 @@ convert_cea708_cc_data_cea708_cdp_internal (GstCCConverter * self,
}
gst_byte_writer_put_uint8_unchecked (&bw, 0x72);
gst_byte_writer_put_uint8_unchecked (&bw, 0xe0 | cc_count);
gst_byte_writer_put_uint8_unchecked (&bw, 0xe0 | fps_entry->max_cc_count);
gst_byte_writer_put_data_unchecked (&bw, cc_data, cc_data_len);
while (cc_count > cc_data_len / 3) {
while (fps_entry->max_cc_count > cc_data_len / 3) {
gst_byte_writer_put_uint8_unchecked (&bw, 0xf8);
gst_byte_writer_put_uint8_unchecked (&bw, 0x00);
gst_byte_writer_put_uint8_unchecked (&bw, 0x00);
@ -787,6 +778,8 @@ convert_cea608_raw_cea708_cdp (GstCCConverter * self, GstBuffer * inbuf,
GstMapInfo in, out;
guint i, n, len;
guint8 cc_data[256];
const GstVideoTimeCodeMeta *tc_meta;
const struct cdp_fps_entry *fps_entry;
n = gst_buffer_get_size (inbuf);
if (n & 1) {
@ -811,9 +804,14 @@ convert_cea608_raw_cea708_cdp (GstCCConverter * self, GstBuffer * inbuf,
cc_data[i * 3 + 2] = in.data[i * 2 + 1];
}
fps_entry = cdp_fps_entry_from_fps (self->out_fps_n, self->out_fps_d);
if (!fps_entry || fps_entry->fps_n == 0)
g_assert_not_reached ();
tc_meta = gst_buffer_get_video_time_code_meta (inbuf);
len =
convert_cea708_cc_data_cea708_cdp_internal (self, cc_data, n * 3,
out.data, out.size, gst_buffer_get_video_time_code_meta (inbuf));
out.data, out.size, tc_meta ? &tc_meta->tc : NULL, fps_entry);
gst_buffer_unmap (inbuf, &in);
gst_buffer_unmap (outbuf, &out);
@ -907,6 +905,8 @@ convert_cea608_s334_1a_cea708_cdp (GstCCConverter * self, GstBuffer * inbuf,
GstMapInfo in, out;
guint i, n, len;
guint8 cc_data[256];
const GstVideoTimeCodeMeta *tc_meta;
const struct cdp_fps_entry *fps_entry;
n = gst_buffer_get_size (inbuf);
if (n % 3 != 0) {
@ -930,9 +930,14 @@ convert_cea608_s334_1a_cea708_cdp (GstCCConverter * self, GstBuffer * inbuf,
cc_data[i * 3 + 2] = in.data[i * 3 + 2];
}
fps_entry = cdp_fps_entry_from_fps (self->out_fps_n, self->out_fps_d);
if (!fps_entry || fps_entry->fps_n == 0)
g_assert_not_reached ();
tc_meta = gst_buffer_get_video_time_code_meta (inbuf);
len =
convert_cea708_cc_data_cea708_cdp_internal (self, cc_data, n * 3,
out.data, out.size, gst_buffer_get_video_time_code_meta (inbuf));
out.data, out.size, tc_meta ? &tc_meta->tc : NULL, fps_entry);
gst_buffer_unmap (inbuf, &in);
gst_buffer_unmap (outbuf, &out);
@ -1035,6 +1040,8 @@ convert_cea708_cc_data_cea708_cdp (GstCCConverter * self, GstBuffer * inbuf,
GstMapInfo in, out;
guint n;
guint len;
const GstVideoTimeCodeMeta *tc_meta;
const struct cdp_fps_entry *fps_entry;
n = gst_buffer_get_size (inbuf);
if (n % 3 != 0) {
@ -1052,9 +1059,14 @@ convert_cea708_cc_data_cea708_cdp (GstCCConverter * self, GstBuffer * inbuf,
gst_buffer_map (inbuf, &in, GST_MAP_READ);
gst_buffer_map (outbuf, &out, GST_MAP_WRITE);
fps_entry = cdp_fps_entry_from_fps (self->out_fps_n, self->out_fps_d);
if (!fps_entry || fps_entry->fps_n == 0)
g_assert_not_reached ();
tc_meta = gst_buffer_get_video_time_code_meta (inbuf);
len =
convert_cea708_cc_data_cea708_cdp_internal (self, in.data, in.size,
out.data, out.size, gst_buffer_get_video_time_code_meta (inbuf));
out.data, out.size, tc_meta ? &tc_meta->tc : NULL, fps_entry);
gst_buffer_unmap (inbuf, &in);
gst_buffer_unmap (outbuf, &out);