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avcodec/utils: calculate frame number of HEVC if the framerate > 30FPS
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
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@ -367,6 +367,7 @@ AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx);
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* Check AVFrame for S12M timecode side data and allocate and fill TC SEI message with timecode info
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*
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* @param frame Raw frame to get S12M timecode side data from
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* @param rate The frame rate
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* @param prefix_len Number of bytes to allocate before SEI message
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* @param data Pointer to a variable to store allocated memory
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* Upon return the variable will hold NULL on error or if frame has no S12M timecode info.
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@ -375,7 +376,7 @@ AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx);
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* @param sei_size Pointer to a variable to store generated SEI message length
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* @return Zero on success, negative error code on failure
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*/
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int ff_alloc_timecode_sei(const AVFrame *frame, size_t prefix_len,
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int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_len,
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void **data, size_t *sei_size);
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/**
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@ -2219,7 +2219,7 @@ static int nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
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void *tc_data = NULL;
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size_t tc_size = 0;
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if (ff_alloc_timecode_sei(frame, 0, (void**)&tc_data, &tc_size) < 0) {
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if (ff_alloc_timecode_sei(frame, avctx->framerate, 0, (void**)&tc_data, &tc_size) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Not enough memory for timecode sei, skipping\n");
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}
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@ -2213,7 +2213,7 @@ static unsigned bcd2uint(uint8_t bcd)
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return low + 10*high;
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}
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int ff_alloc_timecode_sei(const AVFrame *frame, size_t prefix_len,
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int ff_alloc_timecode_sei(const AVFrame *frame, AVRational rate, size_t prefix_len,
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void **data, size_t *sei_size)
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{
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AVFrameSideData *sd = NULL;
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@ -2249,6 +2249,17 @@ int ff_alloc_timecode_sei(const AVFrame *frame, size_t prefix_len,
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unsigned ff = bcd2uint(tcsmpte>>24 & 0x3f); // 6-bit frames
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unsigned drop = tcsmpte & 1<<30 && !0; // 1-bit drop if not arbitrary bit
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/* Calculate frame number of HEVC by SMPTE ST 12-1:2014 Sec 12.2 if rate > 30FPS */
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if (av_cmp_q(rate, (AVRational) {30, 1}) == 1) {
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unsigned pc;
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ff *= 2;
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if (av_cmp_q(rate, (AVRational) {50, 1}) == 0)
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pc = !!(tcsmpte & 1 << 7);
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else
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pc = !!(tcsmpte & 1 << 23);
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ff = (ff + pc) & 0x7f;
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}
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put_bits(&pb, 1, 1); // clock_timestamp_flag
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put_bits(&pb, 1, 1); // units_field_based_flag
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put_bits(&pb, 5, 0); // counting_type
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