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avdevice/decklink_dec: Added VANC search for all resolutions

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In preparation to make VANC decode modular, to support multiple other VANC data.

Signed-off-by: Karthick J <kjeyapal@akamai.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Karthick J 2017-08-29 16:39:28 +05:30 committed by Marton Balint
parent cb8b729180
commit e6cdf30fb4
1 changed files with 70 additions and 10 deletions
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80
libavdevice/decklink_dec.cpp
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@ -46,6 +46,63 @@ extern "C" {
#include "decklink_common.h"
#include "decklink_dec.h"
typedef struct VANCLineNumber {
BMDDisplayMode mode;
int vanc_start;
int field0_vanc_end;
int field1_vanc_start;
int vanc_end;
} VANCLineNumber;
/* These VANC line numbers need not be very accurate. In any case
* GetBufferForVerticalBlankingLine() will return an error when invalid
* ancillary line number was requested. We just need to make sure that the
* entire VANC region is covered, while making sure we don't decode VANC of
* another source during switching*/
static VANCLineNumber vanc_line_numbers[] = {
/* SD Modes */
{bmdModeNTSC, 11, 19, 274, 282},
{bmdModeNTSC2398, 11, 19, 274, 282},
{bmdModePAL, 7, 22, 320, 335},
{bmdModeNTSCp, 11, -1, -1, 39},
{bmdModePALp, 7, -1, -1, 45},
/* HD 1080 Modes */
{bmdModeHD1080p2398, 8, -1, -1, 42},
{bmdModeHD1080p24, 8, -1, -1, 42},
{bmdModeHD1080p25, 8, -1, -1, 42},
{bmdModeHD1080p2997, 8, -1, -1, 42},
{bmdModeHD1080p30, 8, -1, -1, 42},
{bmdModeHD1080i50, 8, 20, 570, 585},
{bmdModeHD1080i5994, 8, 20, 570, 585},
{bmdModeHD1080i6000, 8, 20, 570, 585},
{bmdModeHD1080p50, 8, -1, -1, 42},
{bmdModeHD1080p5994, 8, -1, -1, 42},
{bmdModeHD1080p6000, 8, -1, -1, 42},
/* HD 720 Modes */
{bmdModeHD720p50, 8, -1, -1, 26},
{bmdModeHD720p5994, 8, -1, -1, 26},
{bmdModeHD720p60, 8, -1, -1, 26},
/* For all other modes, for which we don't support VANC */
{bmdModeUnknown, 0, -1, -1, -1}
};
static int get_vanc_line_idx(BMDDisplayMode mode)
{
unsigned int i;
for (i = 0; i < FF_ARRAY_ELEMS(vanc_line_numbers); i++) {
if (mode == vanc_line_numbers[i].mode)
return i;
}
/* Return the VANC idx for Unknown mode */
return i - 1;
}
static uint8_t calc_parity_and_line_offset(int line)
{
uint8_t ret = (line < 313) << 5;
@ -502,18 +559,21 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
}
}
#endif
if (videoFrame->GetWidth() == 1920 && vanc_format == bmdFormat10BitYUV) {
int first_active_line = ctx->bmd_field_dominance == bmdProgressiveFrame ? 42 : 584;
for (i = 8; i < first_active_line; i++) {
if (vanc_format == bmdFormat10BitYUV) {
int idx = get_vanc_line_idx(ctx->bmd_mode);
for (i = vanc_line_numbers[idx].vanc_start; i <= vanc_line_numbers[idx].vanc_end; i++) {
uint8_t *buf;
if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK)
txt_buf = teletext_data_unit_from_vanc_data(buf, txt_buf, ctx->teletext_lines);
if (ctx->bmd_field_dominance != bmdProgressiveFrame && i == 20) // skip field1 active lines
i = 569;
if (txt_buf - txt_buf0 > 1611) { // ensure we still have at least 1920 bytes free in the buffer
av_log(avctx, AV_LOG_ERROR, "Too many OP47 teletext packets.\n");
break;
if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
if (videoFrame->GetWidth() == 1920) {
txt_buf = teletext_data_unit_from_vanc_data(buf, txt_buf, ctx->teletext_lines);
if (txt_buf - txt_buf0 > 1611) { // ensure we still have at least 1920 bytes free in the buffer
av_log(avctx, AV_LOG_ERROR, "Too many OP47 teletext packets.\n");
break;
}
}
}
if (i == vanc_line_numbers[idx].field0_vanc_end)
i = vanc_line_numbers[idx].field1_vanc_start - 1;
}
}
vanc->Release();