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656 lines
21 KiB
656 lines
21 KiB
/* |
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* Blackmagic DeckLink output |
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* Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <DeckLinkAPI.h> |
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#include <pthread.h> |
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#include <semaphore.h> |
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extern "C" { |
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#include "config.h" |
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#include "libavformat/avformat.h" |
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#include "libavformat/internal.h" |
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#include "libavutil/avutil.h" |
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#include "libavutil/common.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/time.h" |
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#include "libavutil/mathematics.h" |
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#if CONFIG_LIBZVBI |
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#include <libzvbi.h> |
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#endif |
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} |
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|
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#include "decklink_common.h" |
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#include "decklink_dec.h" |
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#if CONFIG_LIBZVBI |
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static uint8_t calc_parity_and_line_offset(int line) |
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{ |
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uint8_t ret = (line < 313) << 5; |
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if (line >= 7 && line <= 22) |
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ret += line; |
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if (line >= 320 && line <= 335) |
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ret += (line - 313); |
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return ret; |
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} |
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int teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt) |
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{ |
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vbi_bit_slicer slicer; |
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vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, VBI_PIXFMT_UYVY); |
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if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE) |
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return -1; |
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tgt[0] = 0x02; // data_unit_id |
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tgt[1] = 0x2c; // data_unit_length |
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tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset |
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tgt[3] = 0xe4; // framing code |
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return 0; |
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} |
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#endif |
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static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q) |
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{ |
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memset(q, 0, sizeof(AVPacketQueue)); |
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pthread_mutex_init(&q->mutex, NULL); |
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pthread_cond_init(&q->cond, NULL); |
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q->avctx = avctx; |
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} |
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static void avpacket_queue_flush(AVPacketQueue *q) |
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{ |
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AVPacketList *pkt, *pkt1; |
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pthread_mutex_lock(&q->mutex); |
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for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) { |
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pkt1 = pkt->next; |
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av_packet_unref(&pkt->pkt); |
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av_freep(&pkt); |
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} |
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q->last_pkt = NULL; |
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q->first_pkt = NULL; |
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q->nb_packets = 0; |
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q->size = 0; |
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pthread_mutex_unlock(&q->mutex); |
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} |
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static void avpacket_queue_end(AVPacketQueue *q) |
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{ |
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avpacket_queue_flush(q); |
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pthread_mutex_destroy(&q->mutex); |
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pthread_cond_destroy(&q->cond); |
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} |
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static unsigned long long avpacket_queue_size(AVPacketQueue *q) |
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{ |
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unsigned long long size; |
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pthread_mutex_lock(&q->mutex); |
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size = q->size; |
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pthread_mutex_unlock(&q->mutex); |
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return size; |
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} |
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static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt) |
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{ |
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AVPacketList *pkt1; |
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// Drop Packet if queue size is > 1GB |
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if (avpacket_queue_size(q) > 1024 * 1024 * 1024 ) { |
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av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n"); |
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return -1; |
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} |
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/* duplicate the packet */ |
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if (av_dup_packet(pkt) < 0) { |
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return -1; |
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} |
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pkt1 = (AVPacketList *)av_malloc(sizeof(AVPacketList)); |
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if (!pkt1) { |
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return -1; |
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} |
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pkt1->pkt = *pkt; |
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pkt1->next = NULL; |
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pthread_mutex_lock(&q->mutex); |
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if (!q->last_pkt) { |
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q->first_pkt = pkt1; |
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} else { |
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q->last_pkt->next = pkt1; |
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} |
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q->last_pkt = pkt1; |
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q->nb_packets++; |
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q->size += pkt1->pkt.size + sizeof(*pkt1); |
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pthread_cond_signal(&q->cond); |
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pthread_mutex_unlock(&q->mutex); |
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return 0; |
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} |
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static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block) |
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{ |
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AVPacketList *pkt1; |
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int ret; |
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pthread_mutex_lock(&q->mutex); |
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for (;; ) { |
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pkt1 = q->first_pkt; |
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if (pkt1) { |
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q->first_pkt = pkt1->next; |
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if (!q->first_pkt) { |
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q->last_pkt = NULL; |
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} |
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q->nb_packets--; |
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q->size -= pkt1->pkt.size + sizeof(*pkt1); |
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*pkt = pkt1->pkt; |
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av_free(pkt1); |
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ret = 1; |
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break; |
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} else if (!block) { |
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ret = 0; |
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break; |
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} else { |
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pthread_cond_wait(&q->cond, &q->mutex); |
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} |
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} |
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pthread_mutex_unlock(&q->mutex); |
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return ret; |
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} |
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class decklink_input_callback : public IDeckLinkInputCallback |
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{ |
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public: |
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decklink_input_callback(AVFormatContext *_avctx); |
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~decklink_input_callback(); |
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; } |
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virtual ULONG STDMETHODCALLTYPE AddRef(void); |
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virtual ULONG STDMETHODCALLTYPE Release(void); |
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virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags); |
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virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*); |
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private: |
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ULONG m_refCount; |
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pthread_mutex_t m_mutex; |
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AVFormatContext *avctx; |
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decklink_ctx *ctx; |
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int no_video; |
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int64_t initial_video_pts; |
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int64_t initial_audio_pts; |
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}; |
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decklink_input_callback::decklink_input_callback(AVFormatContext *_avctx) : m_refCount(0) |
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{ |
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avctx = _avctx; |
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decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
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ctx = (struct decklink_ctx *) cctx->ctx; |
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initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE; |
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pthread_mutex_init(&m_mutex, NULL); |
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} |
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decklink_input_callback::~decklink_input_callback() |
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{ |
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pthread_mutex_destroy(&m_mutex); |
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} |
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ULONG decklink_input_callback::AddRef(void) |
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{ |
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pthread_mutex_lock(&m_mutex); |
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m_refCount++; |
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pthread_mutex_unlock(&m_mutex); |
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return (ULONG)m_refCount; |
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} |
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ULONG decklink_input_callback::Release(void) |
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{ |
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pthread_mutex_lock(&m_mutex); |
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m_refCount--; |
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pthread_mutex_unlock(&m_mutex); |
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if (m_refCount == 0) { |
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delete this; |
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return 0; |
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} |
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return (ULONG)m_refCount; |
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} |
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static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame, |
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IDeckLinkAudioInputPacket *audioFrame, |
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int64_t wallclock, |
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DecklinkPtsSource pts_src, |
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AVRational time_base, int64_t *initial_pts) |
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{ |
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int64_t pts = AV_NOPTS_VALUE; |
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BMDTimeValue bmd_pts; |
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BMDTimeValue bmd_duration; |
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HRESULT res = E_INVALIDARG; |
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switch (pts_src) { |
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case PTS_SRC_AUDIO: |
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if (audioFrame) |
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res = audioFrame->GetPacketTime(&bmd_pts, time_base.den); |
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break; |
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case PTS_SRC_VIDEO: |
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if (videoFrame) |
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res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den); |
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break; |
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case PTS_SRC_REFERENCE: |
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if (videoFrame) |
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res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration); |
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break; |
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case PTS_SRC_WALLCLOCK: |
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pts = av_rescale_q(wallclock, AV_TIME_BASE_Q, time_base); |
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break; |
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} |
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if (res == S_OK) |
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pts = bmd_pts / time_base.num; |
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if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE) |
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*initial_pts = pts; |
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if (*initial_pts != AV_NOPTS_VALUE) |
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pts -= *initial_pts; |
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return pts; |
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} |
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HRESULT decklink_input_callback::VideoInputFrameArrived( |
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IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame) |
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{ |
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void *frameBytes; |
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void *audioFrameBytes; |
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BMDTimeValue frameTime; |
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BMDTimeValue frameDuration; |
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int64_t wallclock = 0; |
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ctx->frameCount++; |
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if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK) |
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wallclock = av_gettime_relative(); |
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// Handle Video Frame |
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if (videoFrame) { |
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AVPacket pkt; |
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av_init_packet(&pkt); |
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if (ctx->frameCount % 25 == 0) { |
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unsigned long long qsize = avpacket_queue_size(&ctx->queue); |
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av_log(avctx, AV_LOG_DEBUG, |
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"Frame received (#%lu) - Valid (%liB) - QSize %fMB\n", |
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ctx->frameCount, |
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videoFrame->GetRowBytes() * videoFrame->GetHeight(), |
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(double)qsize / 1024 / 1024); |
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} |
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videoFrame->GetBytes(&frameBytes); |
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videoFrame->GetStreamTime(&frameTime, &frameDuration, |
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ctx->video_st->time_base.den); |
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if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) { |
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if (videoFrame->GetPixelFormat() == bmdFormat8BitYUV) { |
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unsigned bars[8] = { |
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0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035, |
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0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 }; |
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int width = videoFrame->GetWidth(); |
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int height = videoFrame->GetHeight(); |
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unsigned *p = (unsigned *)frameBytes; |
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for (int y = 0; y < height; y++) { |
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for (int x = 0; x < width; x += 2) |
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*p++ = bars[(x * 8) / width]; |
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} |
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} |
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if (!no_video) { |
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av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected " |
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"- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped); |
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} |
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no_video = 1; |
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} else { |
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if (no_video) { |
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av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned " |
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"- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped); |
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} |
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no_video = 0; |
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} |
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pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts); |
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pkt.dts = pkt.pts; |
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pkt.duration = frameDuration; |
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//To be made sure it still applies |
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pkt.flags |= AV_PKT_FLAG_KEY; |
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pkt.stream_index = ctx->video_st->index; |
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pkt.data = (uint8_t *)frameBytes; |
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pkt.size = videoFrame->GetRowBytes() * |
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videoFrame->GetHeight(); |
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//fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts); |
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#if CONFIG_LIBZVBI |
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if (!no_video && ctx->teletext_lines && videoFrame->GetPixelFormat() == bmdFormat8BitYUV && videoFrame->GetWidth() == 720) { |
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IDeckLinkVideoFrameAncillary *vanc; |
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AVPacket txt_pkt; |
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uint8_t txt_buf0[1611]; // max 35 * 46 bytes decoded teletext lines + 1 byte data_identifier |
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uint8_t *txt_buf = txt_buf0; |
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|
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if (videoFrame->GetAncillaryData(&vanc) == S_OK) { |
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int i; |
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int64_t line_mask = 1; |
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txt_buf[0] = 0x10; // data_identifier - EBU_data |
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txt_buf++; |
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for (i = 6; i < 336; i++, line_mask <<= 1) { |
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uint8_t *buf; |
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if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) { |
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if (teletext_data_unit_from_vbi_data(i, buf, txt_buf) >= 0) |
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txt_buf += 46; |
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} |
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if (i == 22) |
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i = 317; |
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} |
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vanc->Release(); |
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if (txt_buf - txt_buf0 > 1) { |
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int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4; |
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while (stuffing_units--) { |
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memset(txt_buf, 0xff, 46); |
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txt_buf[1] = 0x2c; // data_unit_length |
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txt_buf += 46; |
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} |
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av_init_packet(&txt_pkt); |
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txt_pkt.pts = pkt.pts; |
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txt_pkt.dts = pkt.dts; |
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txt_pkt.stream_index = ctx->teletext_st->index; |
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txt_pkt.data = txt_buf0; |
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txt_pkt.size = txt_buf - txt_buf0; |
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if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) { |
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++ctx->dropped; |
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} |
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} |
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} |
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} |
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#endif |
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if (avpacket_queue_put(&ctx->queue, &pkt) < 0) { |
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++ctx->dropped; |
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} |
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} |
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// Handle Audio Frame |
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if (audioFrame) { |
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AVPacket pkt; |
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BMDTimeValue audio_pts; |
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av_init_packet(&pkt); |
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|
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//hack among hacks |
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pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (16 / 8); |
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audioFrame->GetBytes(&audioFrameBytes); |
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audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den); |
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pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts); |
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pkt.dts = pkt.pts; |
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|
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//fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts); |
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pkt.flags |= AV_PKT_FLAG_KEY; |
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pkt.stream_index = ctx->audio_st->index; |
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pkt.data = (uint8_t *)audioFrameBytes; |
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if (avpacket_queue_put(&ctx->queue, &pkt) < 0) { |
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++ctx->dropped; |
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} |
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} |
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return S_OK; |
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} |
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HRESULT decklink_input_callback::VideoInputFormatChanged( |
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BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode, |
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BMDDetectedVideoInputFormatFlags) |
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{ |
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return S_OK; |
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} |
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static HRESULT decklink_start_input(AVFormatContext *avctx) |
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{ |
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struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
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struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
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|
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ctx->input_callback = new decklink_input_callback(avctx); |
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ctx->dli->SetCallback(ctx->input_callback); |
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return ctx->dli->StartStreams(); |
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} |
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|
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extern "C" { |
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av_cold int ff_decklink_read_close(AVFormatContext *avctx) |
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{ |
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struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
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struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
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|
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if (ctx->capture_started) { |
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ctx->dli->StopStreams(); |
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ctx->dli->DisableVideoInput(); |
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ctx->dli->DisableAudioInput(); |
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} |
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ff_decklink_cleanup(avctx); |
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avpacket_queue_end(&ctx->queue); |
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av_freep(&cctx->ctx); |
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return 0; |
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} |
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av_cold int ff_decklink_read_header(AVFormatContext *avctx) |
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{ |
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struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
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struct decklink_ctx *ctx; |
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AVStream *st; |
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HRESULT result; |
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char fname[1024]; |
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char *tmp; |
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int mode_num = 0; |
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int ret; |
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ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx)); |
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if (!ctx) |
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return AVERROR(ENOMEM); |
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ctx->list_devices = cctx->list_devices; |
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ctx->list_formats = cctx->list_formats; |
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ctx->teletext_lines = cctx->teletext_lines; |
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ctx->preroll = cctx->preroll; |
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ctx->duplex_mode = cctx->duplex_mode; |
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if (cctx->video_input > 0 && (unsigned int)cctx->video_input < FF_ARRAY_ELEMS(decklink_video_connection_map)) |
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ctx->video_input = decklink_video_connection_map[cctx->video_input]; |
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if (cctx->audio_input > 0 && (unsigned int)cctx->audio_input < FF_ARRAY_ELEMS(decklink_audio_connection_map)) |
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ctx->audio_input = decklink_audio_connection_map[cctx->audio_input]; |
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ctx->audio_pts_source = cctx->audio_pts_source; |
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ctx->video_pts_source = cctx->video_pts_source; |
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cctx->ctx = ctx; |
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|
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#if !CONFIG_LIBZVBI |
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if (ctx->teletext_lines) { |
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av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing teletext, please recompile FFmpeg.\n"); |
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return AVERROR(ENOSYS); |
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} |
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#endif |
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|
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/* Check audio channel option for valid values: 2, 8 or 16 */ |
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switch (cctx->audio_channels) { |
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case 2: |
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case 8: |
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case 16: |
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break; |
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default: |
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av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n"); |
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return AVERROR(EINVAL); |
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} |
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|
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/* List available devices. */ |
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if (ctx->list_devices) { |
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ff_decklink_list_devices(avctx); |
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return AVERROR_EXIT; |
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} |
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|
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strcpy (fname, avctx->filename); |
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tmp=strchr (fname, '@'); |
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if (tmp != NULL) { |
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mode_num = atoi (tmp+1); |
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*tmp = 0; |
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} |
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|
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ret = ff_decklink_init_device(avctx, fname); |
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if (ret < 0) |
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return ret; |
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|
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/* Get input device. */ |
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if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) { |
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av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n", |
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avctx->filename); |
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ret = AVERROR(EIO); |
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goto error; |
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} |
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|
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/* List supported formats. */ |
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if (ctx->list_formats) { |
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ff_decklink_list_formats(avctx, DIRECTION_IN); |
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ret = AVERROR_EXIT; |
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goto error; |
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} |
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|
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if (mode_num > 0) { |
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if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) { |
|
av_log(avctx, AV_LOG_ERROR, "Could not set mode %d for %s\n", mode_num, fname); |
|
ret = AVERROR(EIO); |
|
goto error; |
|
} |
|
} |
|
|
|
/* Setup streams. */ |
|
st = avformat_new_stream(avctx, NULL); |
|
if (!st) { |
|
av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
|
ret = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; |
|
st->codecpar->sample_rate = bmdAudioSampleRate48kHz; |
|
st->codecpar->channels = cctx->audio_channels; |
|
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
|
ctx->audio_st=st; |
|
|
|
st = avformat_new_stream(avctx, NULL); |
|
if (!st) { |
|
av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
|
ret = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
|
st->codecpar->width = ctx->bmd_width; |
|
st->codecpar->height = ctx->bmd_height; |
|
|
|
st->time_base.den = ctx->bmd_tb_den; |
|
st->time_base.num = ctx->bmd_tb_num; |
|
|
|
if (cctx->v210) { |
|
st->codecpar->codec_id = AV_CODEC_ID_V210; |
|
st->codecpar->codec_tag = MKTAG('V', '2', '1', '0'); |
|
st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 64, st->time_base.den, st->time_base.num * 3); |
|
} else { |
|
st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO; |
|
st->codecpar->format = AV_PIX_FMT_UYVY422; |
|
st->codecpar->codec_tag = MKTAG('U', 'Y', 'V', 'Y'); |
|
st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num); |
|
} |
|
|
|
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
|
|
|
ctx->video_st=st; |
|
|
|
if (ctx->teletext_lines) { |
|
st = avformat_new_stream(avctx, NULL); |
|
if (!st) { |
|
av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n"); |
|
ret = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE; |
|
st->time_base.den = ctx->bmd_tb_den; |
|
st->time_base.num = ctx->bmd_tb_num; |
|
st->codecpar->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->codecpar->channels); |
|
result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, ctx->audio_st->codecpar->channels); |
|
|
|
if (result != S_OK) { |
|
av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n"); |
|
ret = AVERROR(EIO); |
|
goto error; |
|
} |
|
|
|
result = ctx->dli->EnableVideoInput(ctx->bmd_mode, |
|
cctx->v210 ? bmdFormat10BitYUV : bmdFormat8BitYUV, |
|
bmdVideoInputFlagDefault); |
|
|
|
if (result != S_OK) { |
|
av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n"); |
|
ret = AVERROR(EIO); |
|
goto error; |
|
} |
|
|
|
avpacket_queue_init (avctx, &ctx->queue); |
|
|
|
if (decklink_start_input (avctx) != S_OK) { |
|
av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n"); |
|
ret = AVERROR(EIO); |
|
goto error; |
|
} |
|
|
|
return 0; |
|
|
|
error: |
|
ff_decklink_cleanup(avctx); |
|
return ret; |
|
} |
|
|
|
int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt) |
|
{ |
|
struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
|
struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
|
AVFrame *frame = ctx->video_st->codec->coded_frame; |
|
|
|
avpacket_queue_get(&ctx->queue, pkt, 1); |
|
if (frame && (ctx->bmd_field_dominance == bmdUpperFieldFirst || ctx->bmd_field_dominance == bmdLowerFieldFirst)) { |
|
frame->interlaced_frame = 1; |
|
if (ctx->bmd_field_dominance == bmdUpperFieldFirst) { |
|
frame->top_field_first = 1; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
} /* extern "C" */
|
|
|