#include <semaphore.h>
extern "C" {
+#include "config.h"
#include "libavformat/avformat.h"
#include "libavformat/internal.h"
#include "libavutil/imgutils.h"
+#if CONFIG_LIBZVBI
+#include <libzvbi.h>
+#endif
}
#include "decklink_common.h"
#include "decklink_dec.h"
+#if CONFIG_LIBZVBI
+static uint8_t calc_parity_and_line_offset(int line)
+{
+ uint8_t ret = (line < 313) << 5;
+ if (line >= 7 && line <= 22)
+ ret += line;
+ if (line >= 320 && line <= 335)
+ ret += (line - 313);
+ return ret;
+}
+
+int teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt)
+{
+ vbi_bit_slicer slicer;
+
+ vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, VBI_PIXFMT_UYVY);
+
+ if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)
+ return -1;
+
+ tgt[0] = 0x02; // data_unit_id
+ tgt[1] = 0x2c; // data_unit_length
+ tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset
+ tgt[3] = 0xe4; // framing code
+
+ return 0;
+}
+#endif
+
static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)
{
memset(q, 0, sizeof(AVPacketQueue));
pkt.size = videoFrame->GetRowBytes() *
videoFrame->GetHeight();
//fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
+
+#if CONFIG_LIBZVBI
+ if (!no_video && ctx->teletext_lines && videoFrame->GetPixelFormat() == bmdFormat8BitYUV && videoFrame->GetWidth() == 720) {
+ IDeckLinkVideoFrameAncillary *vanc;
+ AVPacket txt_pkt;
+ uint8_t txt_buf0[1611]; // max 35 * 46 bytes decoded teletext lines + 1 byte data_identifier
+ uint8_t *txt_buf = txt_buf0;
+
+ if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
+ int i;
+ int64_t line_mask = 1;
+ txt_buf[0] = 0x10; // data_identifier - EBU_data
+ txt_buf++;
+ for (i = 6; i < 336; i++, line_mask <<= 1) {
+ uint8_t *buf;
+ if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
+ if (teletext_data_unit_from_vbi_data(i, buf, txt_buf) >= 0)
+ txt_buf += 46;
+ }
+ if (i == 22)
+ i = 317;
+ }
+ vanc->Release();
+ if (txt_buf - txt_buf0 > 1) {
+ int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
+ while (stuffing_units--) {
+ memset(txt_buf, 0xff, 46);
+ txt_buf[1] = 0x2c; // data_unit_length
+ txt_buf += 46;
+ }
+ av_init_packet(&txt_pkt);
+ txt_pkt.pts = pkt.pts;
+ txt_pkt.dts = pkt.dts;
+ txt_pkt.stream_index = ctx->teletext_st->index;
+ txt_pkt.data = txt_buf0;
+ txt_pkt.size = txt_buf - txt_buf0;
+ if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) {
+ ++ctx->dropped;
+ }
+ }
+ }
+ }
+#endif
+
c->frame_number++;
if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
++ctx->dropped;
return AVERROR(ENOMEM);
ctx->list_devices = cctx->list_devices;
ctx->list_formats = cctx->list_formats;
+ ctx->teletext_lines = cctx->teletext_lines;
ctx->preroll = cctx->preroll;
cctx->ctx = ctx;
+#if !CONFIG_LIBZVBI
+ if (ctx->teletext_lines) {
+ av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing teletext, please recompile FFmpeg.\n");
+ return AVERROR(ENOSYS);
+ }
+#endif
+
+ /* Check audio channel option for valid values: 2, 8 or 16 */
+ switch (cctx->audio_channels) {
+ case 2:
+ case 8:
+ case 16:
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n");
+ return AVERROR(EINVAL);
+ }
+
iter = CreateDeckLinkIteratorInstance();
if (!iter) {
av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
st->codec->sample_rate = bmdAudioSampleRate48kHz;
- st->codec->channels = 2;
+ st->codec->channels = cctx->audio_channels;
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
ctx->audio_st=st;
st->codec->time_base.den = ctx->bmd_tb_den;
st->codec->time_base.num = ctx->bmd_tb_num;
- st->codec->bit_rate = avpicture_get_size(st->codec->pix_fmt, ctx->bmd_width, ctx->bmd_height) * 1/av_q2d(st->codec->time_base) * 8;
+ st->codec->bit_rate = av_image_get_buffer_size(st->codec->pix_fmt, ctx->bmd_width, ctx->bmd_height, 1) * 1/av_q2d(st->codec->time_base) * 8;
if (cctx->v210) {
st->codec->codec_id = AV_CODEC_ID_V210;
ctx->video_st=st;
- result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, 2);
+ if (ctx->teletext_lines) {
+ st = avformat_new_stream(avctx, NULL);
+ if (!st) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
+ goto error;
+ }
+ st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codec->time_base.den = ctx->bmd_tb_den;
+ st->codec->time_base.num = ctx->bmd_tb_num;
+ st->codec->codec_id = AV_CODEC_ID_DVB_TELETEXT;
+ avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+ ctx->teletext_st = st;
+ }
+
+ av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codec->channels);
+ result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, ctx->audio_st->codec->channels);
if (result != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");
projects / ffmpeg / blobdiff